Targeted Patent:

Patent: US10447450B2
Filed: 2005-09-28
Issued: 2019-10-15
Patent Holder: (Original Assignee) Neocific Inc     (Current Assignee) Neo Wireless LLC
Inventor(s): Xiaodong Li, Haiming Huang, Titus Lo, Ruifeng Wang

Title: Method and system for multi-carrier packet communication with reduced overhead

 
Cross Reference / Shared Meaning between the Lines		 Charted Against:

Patent: US6947748B2
Filed: 2000-12-15
Issued: 2005-09-20
Patent Holder: (Original Assignee) Adaptix Inc     (Current Assignee) SDR HOLDINGS LLC ; Adaptix Inc ; Kaon Systems Inc
Inventor(s): Xiaodong Li, Hui Liu, Kemin Li, Wenzhong Zhang

Title: OFDMA with adaptive subcarrier-cluster configuration and selective loading
[FEATURE ID: 1] operating method, identifier, transmittingassignment, access, allocation, indicia, identity, acknowledgment, index[FEATURE ID: 1] subcarrier selection, indication
[FEATURE ID: 2] wireless network, base station, mobile stationtransmitter, transceiver, network, node, base, cell, repeater[FEATURE ID: 2] system, subscriber, base station, bas station
[TRANSITIVE ID: 3] comprising, containing, assigning, havingincluding, providing, representing, includes, with, of, by[TRANSITIVE ID: 3] employing, comprising, comprises
[TRANSITIVE ID: 4] employing, recoveringgenerating, receiving, detecting, transmitting, determining, providing, deriving[TRANSITIVE ID: 4] measuring, selecting
[FEATURE ID: 5] frame structure, method, mobile devicesystem, process, apparatus, device, protocol, procedure, scheme[FEATURE ID: 5] method
[FEATURE ID: 6] multiple frames, time intervals, frequency subcarriers, frequency resource units, OFDM symbols, subcarrierssymbols, channels, cells, blocks, data, resources, slots[FEATURE ID: 6] subcarriers, pilot symbols, reception, candidate subcarriers, intra-cell traffic load, selection
[FEATURE ID: 7] transmissioncommunication, synchronization, time, scheduling[FEATURE ID: 7] pilot periods
[FEATURE ID: 8] time interval, segment, unit, groupblock, slot, period, one, portion, packet, section[FEATURE ID: 8] cluster
[FEATURE ID: 9] orthogonal frequency division multiplexingof, frequency, spatial multiplex, frequency division[FEATURE ID: 9] orthogonal frequency division multiple access
[FEATURE ID: 10] OFDMof, om, od, af, multiple access[FEATURE ID: 10] OFDMA
[FEATURE ID: 11] OFDM symbolcarrier, resource, signal, symbol, frequency, noise, power[FEATURE ID: 11] channel, noise ratio
[FEATURE ID: 12] signaldata, transmission, signals, channel, communication[FEATURE ID: 12] feedback information, power
[FEATURE ID: 13] informationsignaling, energy, interference, the, traffic[FEATURE ID: 13] signal
[FEATURE ID: 14] set, conjunctioncluster, combination, plurality, use, accordance, parallel, pair[FEATURE ID: 14] set, order
[TRANSITIVE ID: 15] receivingcapturing, measuring, acquiring, obtaining, observing, detecting, sensing[TRANSITIVE ID: 15] monitoring
[TRANSITIVE ID: 16] transmitted, receivedtransferred, communicated, sent, broadcast, transmission, returned, delivered[TRANSITIVE ID: 16] received, known
[FEATURE ID: 17] claimstep, figure, request claim, the claim, par claim, requirement, embodiment[FEATURE ID: 17] claim
[FEATURE ID: 18] subcarrierchannel, power, symbol, carrier, time, bandwidth, chip[FEATURE ID: 18] interference, intra-cell traffic
[FEATURE ID: 19] furtheroptionally, furthermore, additionally, alternatively, also[FEATURE ID: 19] further
1 . An operating method [FEATURE ID: 1]

for a wireless network [FEATURE ID: 2]

comprising [TRANSITIVE ID: 3]

at least a base station [FEATURE ID: 2]

and a mobile station [FEATURE ID: 2]

, the wireless network employing [TRANSITIVE ID: 4]

a frame structure [FEATURE ID: 5]

of multiple frames [FEATURE ID: 6]

for transmission [FEATURE ID: 7]

, each frame comprising a plurality of time intervals [FEATURE ID: 6]

, each time interval [FEATURE ID: 8]

comprising a plurality of orthogonal frequency division multiplexing [FEATURE ID: 9]

( OFDM [FEATURE ID: 10]

) symbols , and each OFDM symbol [FEATURE ID: 11]

containing [TRANSITIVE ID: 3]

a plurality of frequency subcarriers [FEATURE ID: 6]

, the method [FEATURE ID: 5]

comprising : assigning [TRANSITIVE ID: 3]

an identifier [FEATURE ID: 1]

to the mobile station ; transmitting [TRANSITIVE ID: 1]

a signal [FEATURE ID: 12]

containing information [FEATURE ID: 13]

from the base station to the mobile station over a segment [FEATURE ID: 8]

of time - frequency resource , the segment having [TRANSITIVE ID: 3]

a starting time - frequency coordinate and the segment comprising N time - frequency resource units [FEATURE ID: 6]

within a time interval , each unit [FEATURE ID: 8]

containing a set [FEATURE ID: 14]

of frequency subcarriers in a group [FEATURE ID: 8]

of OFDM symbols [FEATURE ID: 6]

, where N = 2 , 4 , or 8 ; and receiving [TRANSITIVE ID: 15]

by the mobile station the transmitted [TRANSITIVE ID: 16]

signal ; and recovering [TRANSITIVE ID: 4]

by the mobile station the information from the received [TRANSITIVE ID: 16]

signal based on the starting time - frequency coordinate and N in conjunction [FEATURE ID: 14]

with the identifier assigned to the mobile station . 2 . The method of claim [FEATURE ID: 17]

1 , wherein the starting time - frequency coordinate indicates a starting OFDM symbol of the segment of time - frequency resource . 3 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting subcarrier [FEATURE ID: 18]

of the segment of time - frequency resource . 4 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting group of subcarriers [FEATURE ID: 6]

of the segment of time - frequency resource . 5 . The method of claim 1 , wherein modular coding is applied to the time - frequency resource units in the segment of time - frequency resource . 6 . The method of claim 5 , wherein a repetition coding is further [FEATURE ID: 19]

applied to the time - frequence resource units . 7 . A mobile device [FEATURE ID: 5]

1 . A method [FEATURE ID: 5]

for subcarrier selection [FEATURE ID: 1]

for a system [FEATURE ID: 2]

employing [TRANSITIVE ID: 3]

orthogonal frequency division multiple access [FEATURE ID: 9]

( OFDMA [FEATURE ID: 10]

) comprising [TRANSITIVE ID: 3]

: a subscriber [FEATURE ID: 2]

measuring [TRANSITIVE ID: 4]

channel [FEATURE ID: 11]

and interference information for a plurality of subcarriers [FEATURE ID: 6]

based on pilot symbols [FEATURE ID: 6]

received [TRANSITIVE ID: 16]

from a base station [FEATURE ID: 2]

, wherein the subscriber measuring channel and interference information comprises [TRANSITIVE ID: 3]

the subscriber continuously monitoring [TRANSITIVE ID: 15]

reception [FEATURE ID: 6]

of the pilot symbols known [TRANSITIVE ID: 16]

to the base station and measuring signal [FEATURE ID: 13]

- plus - interference [FEATURE ID: 18]

- to - noise ratio [FEATURE ID: 11]

( SINR ) of each cluster [FEATURE ID: 8]

of subcarriers , and the subscriber measuring intra-cell traffic [FEATURE ID: 18]

; the subscriber selecting [TRANSITIVE ID: 4]

a set [FEATURE ID: 14]

of candidate subcarriers [FEATURE ID: 6]

, wherein the subscriber selects candidate subcarriers based , at least in part , on the intra-cell traffic load balancing ; the subscriber providing feedback information [FEATURE ID: 12]

on the set of candidate subcarriers to the base station ; and the subscriber receiving an indication [FEATURE ID: 1]

of subcarriers of the set of subcarriers selected by the base station for use by the subscriber . 2 . The method defined in claim [FEATURE ID: 17]

1 further [FEATURE ID: 19]

comprising the base station selecting the subcarriers in order [FEATURE ID: 14]

to balance intra-cell traffic load [FEATURE ID: 6]

on each cluster . 3 . A method for subcarrier selection for a system employing orthogonal frequency division multiple access ( OFDMA ) comprising : a subscriber measuring channel and interference information for a plurality of subcarriers based on pilot symbols received from a base station , wherein the subscriber measuring channel and interference information comprises using information from pilot symbol periods and data periods to measure channel and interference information ; the subscriber selecting a set of candidate subcarriers based on the SINR of a cluster of subcarriers and a difference between measured power [FEATURE ID: 12]

corresponding to each cluster during pilot periods [FEATURE ID: 7]

and measured power during data periods ; the subscriber providing feedback information on the set of candidate subcarriers to the base station ; and the subscriber receiving an indication of subcarriers of the set of subcarriers selected by the bas station [FEATURE ID: 2]

for use by the subscriber . 4 . The method defined in claim 3 further comprising the subscriber using the power difference to distinguish , during selection [FEATURE ID: 6]







Targeted Patent:

Patent: US10447450B2
Filed: 2005-09-28
Issued: 2019-10-15
Patent Holder: (Original Assignee) Neocific Inc     (Current Assignee) Neo Wireless LLC
Inventor(s): Xiaodong Li, Haiming Huang, Titus Lo, Ruifeng Wang

Title: Method and system for multi-carrier packet communication with reduced overhead

 
Cross Reference / Shared Meaning between the Lines		 Charted Against:

Patent: US6944120B2
Filed: 2000-04-12
Issued: 2005-09-13
Patent Holder: (Original Assignee) Canada Minister of Industry     (Current Assignee) Canada, AS REPRESENTED BY TH MINISTER OF INDUSTRY ; Apple Inc
Inventor(s): Yiyan Wu, Bernard Caron

Title: Method and system for tiered digital television terrestrial broadcasting services using multi-bit-stream frequency interleaved OFDM
[FEATURE ID: 1] wireless network, base station, mobile station, mobile devicetransmitter, network, transceiver, receiver, system, user, node[FEATURE ID: 1] broadcasting channel, RF channel
[TRANSITIVE ID: 2] comprising, employing, containing, havingusing, including, comprises, providing, with, has, involving[TRANSITIVE ID: 2] comprising
[FEATURE ID: 3] frame structurefrequency, scheme, succession, frame, sequence, series, transmission[FEATURE ID: 3] fashion, OFDM signal
[FEATURE ID: 4] multiple frames, transmission, information, OFDM symbols, subcarrierssymbols, data, channels, packets, signals, values, resources[FEATURE ID: 4] sub-carriers, different bit streams
[FEATURE ID: 5] time intervalssymbols, channels, tones, frames, samples, cells, pulses[FEATURE ID: 5] parallel OFDM sub-carriers
[FEATURE ID: 6] time intervalchannel, period, signal, stream, group, time, symbol[FEATURE ID: 6] different service
[FEATURE ID: 7] OFDM symbolsignal, channel, subband, resource, carrier, time, frequency[FEATURE ID: 7] available frequency spectrum
[FEATURE ID: 8] frequency subcarrierspilots, samples, resources, data, carriers, bits, values[FEATURE ID: 8] OFDM sub-carriers
[FEATURE ID: 9] methodfirst method, step, process, scheme, system, procedure, methods[FEATURE ID: 9] method
[TRANSITIVE ID: 10] assigningtransmitting, transferring, delivering, providing, receiving, sending[TRANSITIVE ID: 10] tiered digital broadcasting
[TRANSITIVE ID: 11] transmittingdistributing, receiving, broadcasting, communicating, projecting, generating[TRANSITIVE ID: 11] modulating
[FEATURE ID: 12] signal, transmitted, subcarrierdata, transmission, information, channel, code, payload, stream[FEATURE ID: 12] bit stream, digital data, upconverted signal
[FEATURE ID: 13] starting timetemporal, space, non, frequency, spatial, phase[FEATURE ID: 13] time
[FEATURE ID: 14] set, groupplurality, grouping, section, multiplicity, subset, segment, combination[FEATURE ID: 14] different number, portion
[FEATURE ID: 15] claimstep, clair, embodiment, clause, paragraph, item, aspect[FEATURE ID: 15] claim
[FEATURE ID: 16] repetition codingpreamble, transform, permutation, constellation, mapping, pattern, matrix[FEATURE ID: 16] Forward Error Correction code
[FEATURE ID: 17] furthersimultaneously, randomly, then, periodically, jointly, repeatedly, separately[FEATURE ID: 17] frequency
1 . An operating method for a wireless network [FEATURE ID: 1]

comprising [TRANSITIVE ID: 2]

at least a base station [FEATURE ID: 1]

and a mobile station [FEATURE ID: 1]

, the wireless network employing [TRANSITIVE ID: 2]

a frame structure [FEATURE ID: 3]

of multiple frames [FEATURE ID: 4]

for transmission [FEATURE ID: 4]

, each frame comprising a plurality of time intervals [FEATURE ID: 5]

, each time interval [FEATURE ID: 6]

comprising a plurality of orthogonal frequency division multiplexing ( OFDM ) symbols , and each OFDM symbol [FEATURE ID: 7]

containing [TRANSITIVE ID: 2]

a plurality of frequency subcarriers [FEATURE ID: 8]

, the method [FEATURE ID: 9]

comprising : assigning [TRANSITIVE ID: 10]

an identifier to the mobile station ; transmitting [TRANSITIVE ID: 11]

a signal [FEATURE ID: 12]

containing information [FEATURE ID: 4]

from the base station to the mobile station over a segment of time - frequency resource , the segment having [TRANSITIVE ID: 2]

a starting time [FEATURE ID: 13]

- frequency coordinate and the segment comprising N time - frequency resource units within a time interval , each unit containing a set [FEATURE ID: 14]

of frequency subcarriers in a group [FEATURE ID: 14]

of OFDM symbols [FEATURE ID: 4]

, where N = 2 , 4 , or 8 ; and receiving by the mobile station the transmitted [TRANSITIVE ID: 12]

signal ; and recovering by the mobile station the information from the received signal based on the starting time - frequency coordinate and N in conjunction with the identifier assigned to the mobile station . 2 . The method of claim [FEATURE ID: 15]

1 , wherein the starting time - frequency coordinate indicates a starting OFDM symbol of the segment of time - frequency resource . 3 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting subcarrier [FEATURE ID: 12]

of the segment of time - frequency resource . 4 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting group of subcarriers [FEATURE ID: 4]

of the segment of time - frequency resource . 5 . The method of claim 1 , wherein modular coding is applied to the time - frequency resource units in the segment of time - frequency resource . 6 . The method of claim 5 , wherein a repetition coding [FEATURE ID: 16]

is further [FEATURE ID: 17]

applied to the time - frequence resource units . 7 . A mobile device [FEATURE ID: 1]

1 . A method [FEATURE ID: 9]

for interleaving sub-carriers [FEATURE ID: 4]

of a plurality of different bit streams [FEATURE ID: 4]

in frequency domain comprising [TRANSITIVE ID: 2]

the steps of : modulating [TRANSITIVE ID: 11]

each bit - stream of the plurality of different bit - streams on a plurality of OFDM sub-carriers [FEATURE ID: 8]

; converting each modulated bit stream [FEATURE ID: 12]

on a plurality of parallel OFDM sub-carriers [FEATURE ID: 5]

in frequency domain ; and , frequency [FEATURE ID: 17]

interleaving the parallel OFDM sub-carriers of each bit - stream with the parallel OFDM sub-carriers of the other bit streams of the plurality of different bit streams such that the parallel OFDM sub-carriers of each bit - stream are spread over an entire available frequency spectrum . 2 . A method for interleaving sub-carriers of a plurality of different bit streams in frequency domain as defined in claim [FEATURE ID: 15]

1 , wherein the sub-carriers of different bit streams have different spectral efficiency . 3 . A method for interleaving sub-carriers of a plurality of different bit streams in frequency domain as defined in claim 2 , wherein the sub-carriers of the different bit streams are alternated in a predetermined fashion [FEATURE ID: 3]

. 4 . A method for interleaving sub-carriers of a plurality of different bit streams in frequency domain as defined in claim 3 , wherein the available frequency spectrum [FEATURE ID: 7]

is equally divided between the different bit streams resulting in a substantially equal number of sub-carriers for each bit stream . 5 . A method for interleaving sub-carriers of a plurality of different bit streams in frequency domain as defined in claim 3 , wherein the available frequency spectrum is unequally divided between the different bit streams resulting in a different number [FEATURE ID: 14]

of sub-carriers for different bit streams . 6 . A method for interleaving sub-carriers of a plurality of different bit streams in frequency domain as defined in claim 3 , wherein the predetermined fashion is time [FEATURE ID: 13]

varying . 7 . A method for interleaving sub-carriers of a plurality of different bit streams in frequency domain as defined in claim 2 , wherein the sub-carriers are interleaved statistically using a pseudo-random sequence . 8 . A method for interleaving sub-carriers of a plurality of different bit streams in frequency domain as defined in claim 7 , wherein the pseudo-random sequence is time varying . 9 . A method for tiered digital broadcasting [FEATURE ID: 10]

comprising the steps of : receiving a plurality of different bit streams , wherein each bit stream represents digital data [FEATURE ID: 12]

targeted for a different service [FEATURE ID: 6]

; modulating each bit - stream of the plurality of different bit - streams on a plurality of OFDM sub-carriers , wherein the sub-carriers of different bit streams have different spectral efficiency ; converting each modulated bit stream on a plurality of parallel OFDM sub-carriers in frequency domain ; frequency interleaving the parallel OFDM sub-carriers of each bit - stream with the parallel OFDM sub-carriers of the other bit streams of the plurality of different bit streams such that the parallel OFDM sub-carriers of each bit - stream are spread over an entire available frequency spectrum ; transforming the interleaved sub-carriers into time domain for providing a frequency interleaved OFDM signal [FEATURE ID: 3]

; upconverting the frequency interleaved OFDM signal to the frequency of a broadcasting channel [FEATURE ID: 1]

: and , transmitting the upconverted signal [FEATURE ID: 12]

. 10 . A method for tiered digital broadcasting as defined in claim 9 , wherein the step of modulating each bit - stream comprises coding based on a Forward Error Correction code [FEATURE ID: 16]

. 11 . A method for tiered digital broadcasting as defined in claim 9 , wherein the interleaved sub-carriers are transformed into time domain using IFFT . 12 . A method for interleaving sub-carriers of a plurality of different bit streams in frequency domain as defined in claim 11 , wherein the sub-carriers of different bit streams have different spectral efficiency . 13 . A method for tiered digital broadcasting as defined in claim 12 , wherein the available frequency spectrum comprises the entire spectrum of a RF channel [FEATURE ID: 1]

. 14 . A method for tiered digital broadcasting as defined in claim 12 , wherein the available frequency spectrum comprises a portion [FEATURE ID: 14]







Targeted Patent:

Patent: US10447450B2
Filed: 2005-09-28
Issued: 2019-10-15
Patent Holder: (Original Assignee) Neocific Inc     (Current Assignee) Neo Wireless LLC
Inventor(s): Xiaodong Li, Haiming Huang, Titus Lo, Ruifeng Wang

Title: Method and system for multi-carrier packet communication with reduced overhead

 
Cross Reference / Shared Meaning between the Lines		 Charted Against:

Patent: US6940914B1
Filed: 2001-06-11
Issued: 2005-09-06
Patent Holder: (Original Assignee) Cingular Wireless II LLC     (Current Assignee) Huawei Technologies Co Ltd
Inventor(s): Titus Lo, Ruifeng Wang

Title: Turbo channel estimation for OFDM systems
[FEATURE ID: 1] operating methodapparatus, infrastructure, exchange, antenna, interleaver, interface, amplifier[FEATURE ID: 1] OFDM communication system, OFDM protocol
[FEATURE ID: 2] wireless network, base station, OFDM symbol, signal, subcarriers, mobile devicenetwork, transmitter, receiver, transceiver, block, wireless, radio[FEATURE ID: 2] method, channel, communication system, multi-antenna receiver, multiple antenna receiver, wireless receiver, wireless channel, system, wireless communication system, channel estimation system, symbol selector
[TRANSITIVE ID: 3] comprising, containing, havingrepresenting, of, being, with, receiving, involving, providing[TRANSITIVE ID: 3] comprising, including, using
[FEATURE ID: 4] mobile stationswitch, receiver, controller, transmitter, compensator, channel, counter[FEATURE ID: 4] symbol compensator, channel estimator
[TRANSITIVE ID: 5] employing, transmitting, receiving, recoveringgenerating, processing, using, providing, detecting, acquiring, decoding[TRANSITIVE ID: 5] estimating, receiving, compensating
[FEATURE ID: 6] frame structureplurality, series, set, period, frequency, sequence, frame[FEATURE ID: 6] group, number
[FEATURE ID: 7] multiple frames, transmission, symbols, OFDM symbolsdata, packets, bits, channels, messages, transmissions, frames[FEATURE ID: 7] symbols, data symbols, data sequences
[FEATURE ID: 8] time intervalssymbols, blocks, frames, cycles, samples, attempts, steps[FEATURE ID: 8] times, iterations
[FEATURE ID: 9] time interval, segment, set, group, subcarriersequence, unit, slot, burst, channel, period, portion[FEATURE ID: 9] block, criteria
[FEATURE ID: 10] frequency subcarriersantennas, pilots, signals, data, bits, leaders, peaks[FEATURE ID: 10] strongest symbols, strongest data symbols
[FEATURE ID: 11] methodmethods, action, stage, operations, procedure, step[FEATURE ID: 11] steps
[TRANSITIVE ID: 12] assigningidentifying, receiving, obtaining, determining, setting[TRANSITIVE ID: 12] choosing
[TRANSITIVE ID: 13] transmittedencoded, communicated, emitted, data, delivered, modulated, received[TRANSITIVE ID: 13] transmitted
[TRANSITIVE ID: 14] receivedoutput, sent, incoming, returned, obtained, stored, input[TRANSITIVE ID: 14] received
[FEATURE ID: 15] claimstep, figure, par claim, requirement, embodiment, clause, item[FEATURE ID: 15] claim
1 . An operating method [FEATURE ID: 1]

for a wireless network [FEATURE ID: 2]

comprising [TRANSITIVE ID: 3]

at least a base station [FEATURE ID: 2]

and a mobile station [FEATURE ID: 4]

, the wireless network employing [TRANSITIVE ID: 5]

a frame structure [FEATURE ID: 6]

of multiple frames [FEATURE ID: 7]

for transmission [FEATURE ID: 7]

, each frame comprising a plurality of time intervals [FEATURE ID: 8]

, each time interval [FEATURE ID: 9]

comprising a plurality of orthogonal frequency division multiplexing ( OFDM ) symbols [FEATURE ID: 7]

, and each OFDM symbol [FEATURE ID: 2]

containing [TRANSITIVE ID: 3]

a plurality of frequency subcarriers [FEATURE ID: 10]

, the method [FEATURE ID: 11]

comprising : assigning [TRANSITIVE ID: 12]

an identifier to the mobile station ; transmitting [TRANSITIVE ID: 5]

a signal [FEATURE ID: 2]

containing information from the base station to the mobile station over a segment [FEATURE ID: 9]

of time - frequency resource , the segment having [TRANSITIVE ID: 3]

a starting time - frequency coordinate and the segment comprising N time - frequency resource units within a time interval , each unit containing a set [FEATURE ID: 9]

of frequency subcarriers in a group [FEATURE ID: 9]

of OFDM symbols [FEATURE ID: 7]

, where N = 2 , 4 , or 8 ; and receiving [TRANSITIVE ID: 5]

by the mobile station the transmitted [TRANSITIVE ID: 13]

signal ; and recovering [TRANSITIVE ID: 5]

by the mobile station the information from the received [TRANSITIVE ID: 14]

signal based on the starting time - frequency coordinate and N in conjunction with the identifier assigned to the mobile station . 2 . The method of claim [FEATURE ID: 15]

1 , wherein the starting time - frequency coordinate indicates a starting OFDM symbol of the segment of time - frequency resource . 3 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting subcarrier [FEATURE ID: 9]

of the segment of time - frequency resource . 4 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting group of subcarriers [FEATURE ID: 2]

of the segment of time - frequency resource . 5 . The method of claim 1 , wherein modular coding is applied to the time - frequency resource units in the segment of time - frequency resource . 6 . The method of claim 5 , wherein a repetition coding is further applied to the time - frequence resource units . 7 . A mobile device [FEATURE ID: 2]

1 . A method [FEATURE ID: 2]

of estimating [TRANSITIVE ID: 5]

a channel [FEATURE ID: 2]

in a communication system [FEATURE ID: 2]

, the method comprising [TRANSITIVE ID: 3]

: receiving [TRANSITIVE ID: 5]

a block [FEATURE ID: 9]

of “ n ” transmitted [TRANSITIVE ID: 13]

symbols [FEATURE ID: 7]

, the symbols including [TRANSITIVE ID: 3]

pilot symbols and “ d ” data symbols [FEATURE ID: 7]

; estimating a channel using [TRANSITIVE ID: 3]

the pilot symbols to create a channel estimate ; choosing [TRANSITIVE ID: 12]

a group [FEATURE ID: 6]

of “ m ” strongest symbols [FEATURE ID: 10]

from the “ d ” received [TRANSITIVE ID: 14]

data symbols ; compensating [TRANSITIVE ID: 5]

the group of “ m ” strongest symbols using the channel estimate to create a group of “ m ” compensated symbols ; re-estimating the channel using the group of “ m ” compensated symbols and pilot symbols ; and either : repeating the steps [FEATURE ID: 11]

of choosing the group of “ m ” strongest symbols , compensating the group of “ m ” strongest symbols and re-estimating the channel , or using a latest channel estimate to compensate all symbols within the block . 2 . The method of claim [FEATURE ID: 15]

1 , wherein the communication system is an OFDM communication system [FEATURE ID: 1]

. 3 . The method of claim 1 , wherein “ m ” is less than “ d ” . 4 . The method of claim 1 , wherein “ m ” equals “ d ” . 5 . The method of claim 1 , wherein the communication system is associated with a multi-antenna receiver [FEATURE ID: 2]

. 6 . A method of estimating a channel in a communication system , the method comprising : receiving a block of “ n ” transmitted symbols , the symbols including pilot symbols and “ d ” data symbols ; estimating a channel using the pilot symbols to create a channel estimate ; choosing a group of “ m ” strongest symbols from the “ d ” received data symbols ; compensating the group of “ m ” strongest symbols using the channel estimate to create a group of “ m ” compensated symbols ; re-estimating the channel using the group of “ m ” compensated symbols and pilot symbols ; and either : choosing a group of “ x ” strongest symbols , compensating the group of “ x ” strongest symbols and re-estimating the channel , or using a latest channel estimate to compensate all symbols within the block . 7 . The method of claim 6 , wherein “ m ” is less than “ d ” . 8 . The method of claim 7 , wherein “ x ” is less than “ m ” . 9 . The method of claim 6 , wherein “ x ” is greater than “ m ” . 10 . The method of claim 6 , wherein “ d ” equals “ m ” and “ m ” equals “ x ” . 11 . The method of claim 6 , wherein the communication system is associated with an OFDM protocol [FEATURE ID: 1]

. 12 . The method of claim 6 , wherein the communication system is associated with a multiple antenna receiver [FEATURE ID: 2]

. 13 . A method of estimating a channel in a wireless receiver [FEATURE ID: 2]

, the method comprising : receiving a block of “ n ” transmitted symbols , the block including pilot symbols and “ d ” data symbols ; estimating a wireless channel [FEATURE ID: 2]

using the pilot symbols to create a channel estimate ; choosing a group of “ m ” strongest data symbols [FEATURE ID: 10]

from the “ d ” received data symbols ; compensating the group of “ m ” strongest symbols using the channel estimate to create a group of “ m ” compensated symbols ; re-estimating the wireless channel using the group of “ m ” compensated symbols and pilot symbols ; and either : repeating the steps of choosing the group of “ x ” strongest symbols , compensating the group of “ x ” strongest symbols and re-estimating the channel at least once , or using a latest channel estimate to compensate all data symbols within the block . 14 . The method of claim 13 , wherein “ m ” equals “ x ” . 15 . The method of claim 13 , wherein “ x ” is less than “ m ” . 16 . The method of claim 13 , wherein “ m ” equals “ d ” . 17 . The method of claim 13 , wherein if the steps of choosing a group of “ x ” strongest symbols , compensating the group of “ x ” strongest symbols and re-estimating the channel at least once are repeated , the steps are repeated a plurality of times [FEATURE ID: 8]

. 18 . A method of estimating a channel in a communication system , the method comprising : receiving a block of symbols ; estimating a channel using at least one of the symbols ; choosing a group of symbols from the received symbols , wherein the group of symbols chosen is chosen based on signal strength ; compensating the group of symbols using the channel estimate ; and re-estimating the channel using the group of compensated symbols and the at least one of the symbols . 19 . The method of claim 18 , wherein the signal strength of the symbols chosen in the group is associated with a predetermined criteria [FEATURE ID: 9]

. 20 . A method of estimating a channel in a wireless receiver , the method comprising : receiving a block of “ n ” transmitted symbols , the block including pilot symbols and “ d ” data symbols ; estimating a wireless channel using the pilot symbols to create a channel estimate ; choosing a group of “ m ” strongest data symbols from the “ d ” received data symbols ; compensating the group of “ m ” strongest symbols using the channel estimate to create a group of “ m ” compensated symbols ; re-estimating the wireless channel using the group of “ m ” compensated symbols and pilot symbols ; determining whether a number [FEATURE ID: 6]

of iterations [FEATURE ID: 8]

is equal to or greater than T , where T is an integer ; and if the number is less than T : choosing “ x ” strongest symbols ; compensating the “ x ” strongest symbols ; and repeating the method continuing at the step of re-estimating the channel using the “ x ” compensated symbols and the pilot symbols ; and if the number is equal to or greater than T : using a latest channel estimate to compensate all data symbols within the block . 21 . A method of estimating a channel in a wireless receiver according to claim 20 , further comprising : if “ x ” is equal to or greater than “ m ” : setting “ m ” equal to “ x ” ; and repeating the method from the step of choosing a group of “ m ” strongest symbols from the “ d ” received data symbols ; and if “ x ” is less than “ m ” , continuing the method at the step of choosing “ x ” strongest symbols . 22 . A system [FEATURE ID: 2]

for performing channel estimation associated with a wireless communication system [FEATURE ID: 2]

, the wireless communication system receiving a block of symbols including pilot symbols and data symbols , the channel estimation system [FEATURE ID: 2]

comprising : a symbol selector [FEATURE ID: 2]

; an initial channel estimator ; a symbol compensator [FEATURE ID: 4]

; and a channel estimator [FEATURE ID: 4]

, wherein the initial channel estimator produces an initial channel estimate using the pilot symbols and the symbol selector chooses a group of “ m ” strongest data symbols , and wherein the “ m ” strongest data symbols are compensated using the initial channel estimate and the channel estimator re-estimates the channel using the compensated symbols and the pilot symbols . 23 . A method of recovering data symbols from a plurality of data sequences [FEATURE ID: 7]







Targeted Patent:

Patent: US10447450B2
Filed: 2005-09-28
Issued: 2019-10-15
Patent Holder: (Original Assignee) Neocific Inc     (Current Assignee) Neo Wireless LLC
Inventor(s): Xiaodong Li, Haiming Huang, Titus Lo, Ruifeng Wang

Title: Method and system for multi-carrier packet communication with reduced overhead

 
Cross Reference / Shared Meaning between the Lines		 Charted Against:

Patent: US6940845B2
Filed: 2000-03-23
Issued: 2005-09-06
Patent Holder: (Original Assignee) AT&T Corp     (Current Assignee) AT&T Corp
Inventor(s): Mathilde Benveniste

Title: Asymmetric measurement-based dynamic packet assignment system and method for wireless data services
[FEATURE ID: 1] operating methodidentifier, assignment, uplink, access, antenna, address, indication[FEATURE ID: 1] uplink channel, uplink channel assignment
[FEATURE ID: 2] wireless network, mobile station, time interval, signal, information, subcarrier, mobile devicenetwork, transceiver, station, device, mobile, channel, receiver[FEATURE ID: 2] downlink channel, mobile station, base station, downlink traffic channel, base stations, system, computer program product, processor
[TRANSITIVE ID: 3] comprising, containingcomprises, includes, with, having, of, including, carrying[TRANSITIVE ID: 3] comprising
[FEATURE ID: 4] base stationsystem, beacon, radio, network, cell[FEATURE ID: 4] periodic super-frame
[TRANSITIVE ID: 5] employing, assigning, transmitting, having, receivingproviding, determining, applying, defining, communicating, scheduling, issuing[TRANSITIVE ID: 5] assigning, medium access control
[FEATURE ID: 6] frame structure, methodsystem, process, scheme, procedure, methods, transmission, frequency[FEATURE ID: 6] method, list
[FEATURE ID: 7] multiple frames, time intervals, identifier, frequency resource units, subcarriersslots, channels, data, transmissions, cells, frequencies, information[FEATURE ID: 7] pilot tones, packets, downlink channel assignment, uplink channels, traffic channels
[FEATURE ID: 8] transmission, segmenttraffic, data, communication, assignment, radio, dl, packet[FEATURE ID: 8] paging, traffic packet, access, downlink channels, uncoupled downlink
[FEATURE ID: 9] framesymbol, subframe, field, transmission frame, given frame, single frame, cycle[FEATURE ID: 9] frame
[FEATURE ID: 10] OFDM symbolchannel, frequency, tone, carrier, signal, symbol, band[FEATURE ID: 10] pilot tone, band pilot tones
[FEATURE ID: 11] frequency subcarrierspilots, sectors, carriers, antennas[FEATURE ID: 11] active mobile stations
[FEATURE ID: 12] OFDM symbolsunits, cells, channels, groups[FEATURE ID: 12] mobile stations
[TRANSITIVE ID: 13] transmitted, receivedbroadcast, transferred, first, emitted, communicated, sent, modulated[TRANSITIVE ID: 13] transmitted, pending
[FEATURE ID: 14] claimstep, invention, embodiment, clause, paragraph, item, figure[FEATURE ID: 14] claim
[FEATURE ID: 15] furthersimultaneously, is, not, sequentially, separately, periodically[FEATURE ID: 15] being
1 . An operating method [FEATURE ID: 1]

for a wireless network [FEATURE ID: 2]

comprising [TRANSITIVE ID: 3]

at least a base station [FEATURE ID: 4]

and a mobile station [FEATURE ID: 2]

, the wireless network employing [TRANSITIVE ID: 5]

a frame structure [FEATURE ID: 6]

of multiple frames [FEATURE ID: 7]

for transmission [FEATURE ID: 8]

, each frame [FEATURE ID: 9]

comprising a plurality of time intervals [FEATURE ID: 7]

, each time interval [FEATURE ID: 2]

comprising a plurality of orthogonal frequency division multiplexing ( OFDM ) symbols , and each OFDM symbol [FEATURE ID: 10]

containing [TRANSITIVE ID: 3]

a plurality of frequency subcarriers [FEATURE ID: 11]

, the method [FEATURE ID: 6]

comprising : assigning [TRANSITIVE ID: 5]

an identifier [FEATURE ID: 7]

to the mobile station ; transmitting [TRANSITIVE ID: 5]

a signal [FEATURE ID: 2]

containing information [FEATURE ID: 2]

from the base station to the mobile station over a segment [FEATURE ID: 8]

of time - frequency resource , the segment having [TRANSITIVE ID: 5]

a starting time - frequency coordinate and the segment comprising N time - frequency resource units [FEATURE ID: 7]

within a time interval , each unit containing a set of frequency subcarriers in a group of OFDM symbols [FEATURE ID: 12]

, where N = 2 , 4 , or 8 ; and receiving [TRANSITIVE ID: 5]

by the mobile station the transmitted [TRANSITIVE ID: 13]

signal ; and recovering by the mobile station the information from the received [TRANSITIVE ID: 13]

signal based on the starting time - frequency coordinate and N in conjunction with the identifier assigned to the mobile station . 2 . The method of claim [FEATURE ID: 14]

1 , wherein the starting time - frequency coordinate indicates a starting OFDM symbol of the segment of time - frequency resource . 3 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting subcarrier [FEATURE ID: 2]

of the segment of time - frequency resource . 4 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting group of subcarriers [FEATURE ID: 7]

of the segment of time - frequency resource . 5 . The method of claim 1 , wherein modular coding is applied to the time - frequency resource units in the segment of time - frequency resource . 6 . The method of claim 5 , wherein a repetition coding is further [FEATURE ID: 15]

applied to the time - frequence resource units . 7 . A mobile device [FEATURE ID: 2]

1 . A method [FEATURE ID: 6]

of assigning [TRANSITIVE ID: 5]

a downlink channel [FEATURE ID: 2]

to a mobile station [FEATURE ID: 2]

registered with a base station [FEATURE ID: 2]

, comprising [TRANSITIVE ID: 3]

the steps of : a ) turning off pilot tones [FEATURE ID: 7]

being [TRANSITIVE ID: 15]

transmitted [TRANSITIVE ID: 13]

by a plurality of active mobile stations [FEATURE ID: 11]

registered with the base station , each turned off pilot tone [FEATURE ID: 10]

corresponding to an assigned downlink channel ; b ) paging [FEATURE ID: 8]

the mobile station with a pending [TRANSITIVE ID: 13]

traffic packet [FEATURE ID: 8]

from the base station ; c ) performing interference sensing at the base station to identify interference - free downlink channels ; d assigning , at the base station , a downlink traffic channel [FEATURE ID: 2]

to the mobile station to receive the pending packets [FEATURE ID: 7]

; e ) transmitting the downlink channel assignment [FEATURE ID: 7]

from the base station to the mobile station ; and wherein there are a plurality of base stations [FEATURE ID: 2]

and steps a ) - e ) are performed successively for each of the plurality of base stations . 2 . A method of assigning an uplink channel [FEATURE ID: 1]

to a mobile station registered with a base station , comprising the steps of : a ) turning off pilot tones being transmitted by the base station , each pilot tones corresponding to an uplink channel assigned to one of a plurality of active mobile stations registered with the base station ; b ) requesting access [FEATURE ID: 8]

from the mobile station for a traffic packet ; c ) performing interference sensing at the plurality of active mobile stations to identify interference - free uplink channels ; d ) transmitting from each one of the plurality of active mobile stations a list [FEATURE ID: 6]

of uplink channels [FEATURE ID: 7]

identified as being acceptably interference - free ; e ) assigning , at the base station , an uplink channel to the mobile station ; and f ) transmitting the uplink channel assignment [FEATURE ID: 1]

from the base station to the mobile station . 3 . The method of claim [FEATURE ID: 14]

2 , wherein uplink channels are assigned to a plurality of mobile stations [FEATURE ID: 12]

registered with the base station . 4 . The method of claim 2 , wherein there are a plurality of base stations and steps a ) - f ) are performed successively for each of the plurality of base stations . 5 . A method of assigning an uplink channel and a downlink channel to a mobile station registered with a base station , comprising the steps of : a ) turning off pilot tones being transmitted by a plurality of active mobile stations registered with the base station , each turned off pilot tone corresponding to an assigned downlink channel ; b ) turning off pilot tones being transmitted by the base station , each pilot tones corresponding to an uplink channel assigned to one of the plurality of active mobile stations registered with the base station ; c ) paging the mobile station with a pending traffic packet from the base station ; d ) requesting access from the mobile station for a traffic packet ; e ) performing interference sensing at the base station to identify interference - free downlink channels ; f ) performing interference sensing at the plurality of active mobile stations to identify interference - free uplink channels ; g ) transmitting from each one of the plurality of active mobile stations a list of uplink channels identified as being acceptably interference - free ; h ) assigning , at the base station , a downlink traffic channel to the mobile station to receive the pending packets ; i ) assigning , at the base station , an uplink channel to the mobile station ; and j ) transmitting the downlink channel assignment and the uplink channel assignment from the base station to the mobile station . 6 . The method of claim 5 , wherein downlink channels [FEATURE ID: 8]

and uplink channels are assigned to a plurality of mobile stations registered with the base station . 7 . The method of claim 5 , wherein there are a plurality of base stations and steps a ) - j ) are performed successively for each of the plurality of base stations . 8 . A system [FEATURE ID: 2]

for assigning an uplink channel to a mobile station registered with a base station , comprising : means for turning off pilot tones being transmitted by the base station , each pilot tones corresponding to an uplink channel assigned to one of a plurality of active mobile stations registered with the base station ; means for requesting access from the mobile station for a traffic packet ; means for performing interference sensing at the plurality of active mobile stations to identify interference - free uplink channels ; means for transmitting from each one of the plurality of active mobile stations a list of uplink channels identified as being acceptably interference - free ; means for assigning , at the base station , an uplink channel to the mobile station ; and means for transmitting the uplink channel assignment from the base station to the mobile station . 9 . The system of claim 8 , wherein downlink channels are assigned to a plurality of mobile stations registered with the base station . 10 . The system of claim 8 , wherein there are a plurality of base stations and the system operates on each of the plurality of base stations . 11 . A system for assigning an uplink channel and a downlink channel to a mobile station registered with a base station , comprising : means for turning off pilot tones being transmitted by a plurality of active mobile stations registered with the base station , each turned off pilot tone corresponding to an assigned downlink channel ; means for turning off pilot tones being transmitted by the base station , each pilot tones corresponding to an uplink channel assigned to one of the plurality of active mobile stations registered with the base station ; means for paging the mobile station with a pending traffic packet from the base station ; means for requesting access from the mobile station for a traffic packet ; means for performing interference sensing at the base station to identify interference - free downlink channels ; means for performing interference sensing at the plurality of active mobile stations to identify interference - free uplink channels ; means for transmitting from each one of the plurality of active mobile stations a list of uplink channels identified as being acceptably interference - free ; means for assigning , at the base station , a downlink traffic channel to the mobile station to receive the pending packets ; means for assigning , at the base station , an uplink channel to the mobile station ; and means for transmitting the downlink channel assignment and the uplink channel assignment from the base station to the mobile station . 12 . The system of claim 11 , wherein downlink channels and uplink channels are assigned to a plurality of mobile stations registered with the base station . 13 . The system of claim 11 , wherein there are a plurality of base stations and the system operates on each of the plurality of base stations . 14 . A computer program product [FEATURE ID: 2]

for assigning a downlink channel to a mobile station registered with a base station , comprising : a computer readable medium ; computer program instructions , recorded on the computer readable medium , executable by a processor [FEATURE ID: 2]

, for performing the steps of : a ) turning off pilot tones being transmitted by a plurality of active mobile stations registered with the base station , each turned off pilot tone corresponding to an assigned downlink channel ; b ) paging the mobile station with a pending traffic packet from the base station ; c ) performing interference sensing at the base station to identify interference - free downlink channels ; d ) assigning , at the base station , a downlink traffic channel to the mobile station to receive the pending packets ; e ) transmitting the downlink channel assignment from the base station to the mobile station ; and wherein there are a plurality of base stations and steps a ) - e ) are performed successively for each of the plurality of base stations . 15 . A computer program product for assigning a uplink channel to a mobile station registered with a base station , comprising : a computer readable medium ; computer program instructions , recorded on the computer readable medium , executable by a processor , for performing the steps of : a ) turning off pilot tones being transmitted by the base station , each pilot tones corresponding to an uplink channel assigned to one of a plurality of active mobile stations registered with the base station ; b ) requesting access from the mobile station for a traffic packet ; c ) performing interference sensing at the plurality of active mobile stations to identify interference - free uplink channels ; d ) transmitting from each one of the plurality of active mobile stations a list of uplink channels identified as being acceptably interference - free ; e ) assigning , at the base station , an uplink channel to the mobile station ; and f ) transmitting the uplink channel assignment from the base station to the mobile station . 16 . The computer program product of claim 15 , wherein downlink channels are assigned to a plurality of mobile stations registered with the base station . 17 . The computer program product of claim 15 , wherein there are a plurality of base stations and steps a ) - f ) are performed successively for each of the plurality of base stations . 18 . A computer program product for assigning an uplink channel and a downlink channel to a mobile station registered with a base station , comprising : a computer readable medium ; computer program instructions , recorded on the computer readable medium , executable by a processor , for performing the steps of : a ) turning off pilot tones being transmitted by a plurality of active mobile stations registered with the base station , each turned off pilot tone corresponding to an assigned downlink channel ; b ) turning off pilot tones being transmitted by the base station , each pilot tones corresponding to an uplink channel assigned to one of the plurality of active mobile stations registered with the base station ; c ) paging the mobile station with a pending traffic packet from the base station ; d ) requesting access from the mobile station for a traffic packet ; e ) performing interference sensing at the base station to identify interference - free downlink channels ; f ) performing interference sensing at the plurality of active mobile stations to identify interference - free uplink channels ; g ) transmitting from each one of the plurality of active mobile stations a list of uplink channels identified as being acceptably interference - free ; h ) assigning , at the base station , a downlink traffic channel to the mobile station to receive the pending packets ; i ) assigning , at the base station , an uplink channel to the mobile station ; and j ) transmitting the downlink channel assignment and the uplink channel assignment from the base station to the mobile station . 19 . The computer program product of claim 18 , wherein downlink channels and uplink channels are assigned to a plurality of mobile stations registered with the base station . 20 . The computer program product of claim 18 , wherein there are a plurality of base stations and steps a ) - j ) are performed successively for each of the plurality of base stations . 21 . A method for medium access control [FEATURE ID: 5]

for uncoupled downlink [FEATURE ID: 8]

and uplink channel assignment , comprising : assigning a base station a frame [FEATURE ID: 9]

within a periodic super-frame [FEATURE ID: 4]

during which it transmits ; transmitting narrow - band pilot tones [FEATURE ID: 10]

from the base station , corresponding to assigned traffic channels [FEATURE ID: 7]







Targeted Patent:

Patent: US10447450B2
Filed: 2005-09-28
Issued: 2019-10-15
Patent Holder: (Original Assignee) Neocific Inc     (Current Assignee) Neo Wireless LLC
Inventor(s): Xiaodong Li, Haiming Huang, Titus Lo, Ruifeng Wang

Title: Method and system for multi-carrier packet communication with reduced overhead

 
Cross Reference / Shared Meaning between the Lines		 Charted Against:

Patent: US6940827B2
Filed: 2001-03-09
Issued: 2005-09-06
Patent Holder: (Original Assignee) Adaptix Inc     (Current Assignee) J & K SERVICES LLC ; SDR HOLDINGS LLC ; Adaptix Inc ; Kaon Systems Inc
Inventor(s): Xiaodong Li, Hui Liu, Wenzhong Zhang

Title: Communication system using OFDM for one direction and DSSS for another direction
[FEATURE ID: 1] operating method, identifierindication, encoding, operation, index, address, interface, assignment[FEATURE ID: 1] output
[FEATURE ID: 2] wireless network, mobile devicetransmitter, receiver, transceiver, terminal, modem, network, station[FEATURE ID: 2] subscriber, base station, system, DSSS transmitter, second switch, first frequency duplexer, second frequency duplexer, encoder
[TRANSITIVE ID: 3] comprising, containing, havingof, including, with, defining, has, using, includes[TRANSITIVE ID: 3] comprising, comprises, having
[FEATURE ID: 4] base stationcontroller, transmitter, first, transceiver, coupler, second, wireless antenna[FEATURE ID: 4] first antenna, second antenna coup, first switch
[FEATURE ID: 5] mobile stationcontroller, transmitter, device, subscriber, receiver, transceiver, processor[FEATURE ID: 5] DSSS receiver, FEC encoder
[TRANSITIVE ID: 6] employingusing, transmitting, receiving, operating[TRANSITIVE ID: 6] communicating
[FEATURE ID: 7] multiple frames, transmission, time intervals, frequency subcarriers, signal, information, OFDM symbols, transmitted, subcarriersdata, symbols, channels, tones, transmissions, bits, messages[FEATURE ID: 7] signal, signals, OFDM signals, DSSS signals, subscribers, signals
[FEATURE ID: 8] time intervalstream, sequence, symbol, space[FEATURE ID: 8] sequence spread spectrum
[FEATURE ID: 9] orthogonal frequency division multiplexingof, modulated, spread spectrum, quadrature, interleave modulated, orthogonally modulated, amplitude modulation[FEATURE ID: 9] orthogonal frequency domain multiplexing
[FEATURE ID: 10] OFDMof, os, od, ot, om[FEATURE ID: 10] OFDM
[FEATURE ID: 11] methodfirst method, process, procedure, methods, system[FEATURE ID: 11] method
[TRANSITIVE ID: 12] assigning, transmitting, receiving, recoveringgenerating, obtaining, determining, delivering, processing, emitting, providing[TRANSITIVE ID: 12] transmitting, receiving
[FEATURE ID: 13] conjunctionaccordance, comparison, parallel, reference[FEATURE ID: 13] response
[FEATURE ID: 14] claimstep, clair, the claim, requirement, embodiment, paragraph, item[FEATURE ID: 14] claim
1 . An operating method [FEATURE ID: 1]

for a wireless network [FEATURE ID: 2]

comprising [TRANSITIVE ID: 3]

at least a base station [FEATURE ID: 4]

and a mobile station [FEATURE ID: 5]

, the wireless network employing [TRANSITIVE ID: 6]

a frame structure of multiple frames [FEATURE ID: 7]

for transmission [FEATURE ID: 7]

, each frame comprising a plurality of time intervals [FEATURE ID: 7]

, each time interval [FEATURE ID: 8]

comprising a plurality of orthogonal frequency division multiplexing [FEATURE ID: 9]

( OFDM [FEATURE ID: 10]

) symbols , and each OFDM symbol containing [TRANSITIVE ID: 3]

a plurality of frequency subcarriers [FEATURE ID: 7]

, the method [FEATURE ID: 11]

comprising : assigning [TRANSITIVE ID: 12]

an identifier [FEATURE ID: 1]

to the mobile station ; transmitting [TRANSITIVE ID: 12]

a signal [FEATURE ID: 7]

containing information [FEATURE ID: 7]

from the base station to the mobile station over a segment of time - frequency resource , the segment having [TRANSITIVE ID: 3]

a starting time - frequency coordinate and the segment comprising N time - frequency resource units within a time interval , each unit containing a set of frequency subcarriers in a group of OFDM symbols [FEATURE ID: 7]

, where N = 2 , 4 , or 8 ; and receiving [TRANSITIVE ID: 12]

by the mobile station the transmitted [TRANSITIVE ID: 7]

signal ; and recovering [TRANSITIVE ID: 12]

by the mobile station the information from the received signal based on the starting time - frequency coordinate and N in conjunction [FEATURE ID: 13]

with the identifier assigned to the mobile station . 2 . The method of claim [FEATURE ID: 14]

1 , wherein the starting time - frequency coordinate indicates a starting OFDM symbol of the segment of time - frequency resource . 3 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting subcarrier of the segment of time - frequency resource . 4 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting group of subcarriers [FEATURE ID: 7]

of the segment of time - frequency resource . 5 . The method of claim 1 , wherein modular coding is applied to the time - frequency resource units in the segment of time - frequency resource . 6 . The method of claim 5 , wherein a repetition coding is further applied to the time - frequence resource units . 7 . A mobile device [FEATURE ID: 2]

1 . A method [FEATURE ID: 11]

for communicating [TRANSITIVE ID: 6]

with at least one subscriber [FEATURE ID: 2]

, the method comprising [TRANSITIVE ID: 3]

: transmitting [TRANSITIVE ID: 12]

orthogonal frequency domain multiplexing [FEATURE ID: 9]

( OFDM [FEATURE ID: 10]

) signal [FEATURE ID: 7]

to the at least one subscriber ; and receiving [TRANSITIVE ID: 12]

direct - sequence spread spectrum [FEATURE ID: 8]

( DSSS ) signals [FEATURE ID: 7]

from the at least one subscriber in response [FEATURE ID: 13]

to the OFDM signals [FEATURE ID: 7]

. 2 . The method defined in claim [FEATURE ID: 14]

1 wherein receiving the DSSS signals [FEATURE ID: 7]

comprises [TRANSITIVE ID: 3]

receiving multiple code division multiple access ( CDMA ) signals from a plurality of subscribers [FEATURE ID: 7]

. 3 . A method for communicating with a base station [FEATURE ID: 2]

, the method comprising : receiving orthogonal frequency domain multiplexing ( OFDM ) signals from the base station ; and transmitting direct - sequence spread spectrum ( DSSS ) signals [TRANSITIVE ID: 7]

to the base station in response to the OFDM signals . 4 . The method defined in claim 3 wherein transmitting the DSSS signals comprises transmitting multiple code division multiple access ( CDMA ) signals from a plurality of subscribers . 5 . A system [FEATURE ID: 2]

comprising : a subscriber having [TRANSITIVE ID: 3]

a DSSS transmitter [FEATURE ID: 2]

, an OFDM receiver , a first antenna [FEATURE ID: 4]

coupled to the DSSS transmitter and the OFDM receiver ; and a base station communicably coupled with the subscriber , the base station having a DSSS receiver [FEATURE ID: 5]

, an OFDM transmitter , a second antenna coup [FEATURE ID: 4]

ted to the DSSS receiver and the OFDM transmitter , wherein the OFDM receiver of the subscriber is to receive OFDM signals from the OFDM transmitter of the base station , wherein the DSSS transmitter of the subscriber is to transmit DSSS signals to the base station in response to the received OFDM signals , and wherein the DSSS signals are received by the DSSS receiver of the base station . 6 . The system defined in claim 5 further comprising : a first switch [FEATURE ID: 4]

to couple to the DSSS transmitter and the OFDM receiver to the first antenna ; and a second switch [FEATURE ID: 2]

to couple to the DSSS receiver and the OFDM transmitter to the second antenna . 7 . The system defined in claim 5 further comprising : a first frequency duplexer [FEATURE ID: 2]

to couple to the DSSS transmitter and the OFDM receiver to the first antenna ; and a second frequency duplexer [FEATURE ID: 2]

to couple to the DSSS receiver and the OFDM transmitter to the second antenna . 8 . The system defined in claim 5 wherein the OFDM transmitter comprises : a plurality of processing paths , wherein each of the processing paths has a forward error correction ( FEC ) encoder [FEATURE ID: 2]

, an interleaver coupled to an output [FEATURE ID: 1]

of the FEC encoder [FEATURE ID: 5]







Targeted Patent:

Patent: US10447450B2
Filed: 2005-09-28
Issued: 2019-10-15
Patent Holder: (Original Assignee) Neocific Inc     (Current Assignee) Neo Wireless LLC
Inventor(s): Xiaodong Li, Haiming Huang, Titus Lo, Ruifeng Wang

Title: Method and system for multi-carrier packet communication with reduced overhead

 
Cross Reference / Shared Meaning between the Lines		 Charted Against:

Patent: US6937665B1
Filed: 1999-04-19
Issued: 2005-08-30
Patent Holder: (Original Assignee) Interuniversitair Microelektronica Centrum vzw IMEC     (Current Assignee) RPX Corp
Inventor(s): Patrick Vandenameele

Title: Method and apparatus for multi-user transmission
[FEATURE ID: 1] wireless network, base station, mobile station, mobile devicenetwork, node, receiver, device, transmitter, system, mobile[FEATURE ID: 1] means, receiving, terminal, means
[TRANSITIVE ID: 2] comprising, employing, containing, assigning, transmitting, havingproviding, using, including, has, with, defining, carrying[TRANSITIVE ID: 2] transmitting, having, comprising, being
[FEATURE ID: 3] frame structure, set, groupplurality, combination, pattern, succession, cluster, row, series[FEATURE ID: 3] method, different composite data signal
[FEATURE ID: 4] multiple frames, transmission, time intervals, information, subcarrierssymbols, channels, frames, data, packets, bits, transmissions[FEATURE ID: 4] data signals, respective data signals, spectra, subbands, composite data signals
[FEATURE ID: 5] time interval, signal, subcarrierchannel, subframe, transmission, data, slot, time, sequence[FEATURE ID: 5] spatial diversity, data signal
[FEATURE ID: 6] OFDM symbolchannel, signal, frequency, symbol, subspace, frame, spectrum[FEATURE ID: 6] subband, subband basis
[FEATURE ID: 7] frequency subcarrierscomponents, signals, values, samples, copies, symbols, sets[FEATURE ID: 7] terminals, versions, estimates, intermediate estimates
[FEATURE ID: 8] methodmethod further, step, system, methods[FEATURE ID: 8] receiving terminal
[FEATURE ID: 9] identifieraccount, index, indication, image[FEATURE ID: 9] estimate
[FEATURE ID: 10] OFDM symbolsblocks, units, clusters, components, groups[FEATURE ID: 10] sets
[TRANSITIVE ID: 11] receiving, recoveringobtaining, decoding, analyzing, processing, detecting, reception, demodulation[TRANSITIVE ID: 11] subband processing, estimation
[TRANSITIVE ID: 12] transmittedresulting, received, first, sent, transmission, corresponding[TRANSITIVE ID: 12] transformed
[TRANSITIVE ID: 13] receivedreceiving, wireless, incoming, resulting, processed, transmitted, input[TRANSITIVE ID: 13] received
[FEATURE ID: 14] claimstep, clair, request claim, the claim, requirement, embodiment, clause[FEATURE ID: 14] claim
[FEATURE ID: 15] modular coding, repetition codingmapping, interpolation, compression, channelization, spreading, permutation, diversity[FEATURE ID: 15] inverse subband processing, guard interval introduction, orthogonal frequency division demultiplexing
[FEATURE ID: 16] furtherthen, jointly, subsequently, selectively, sequentially, directly[FEATURE ID: 16] inverse subband
1 . An operating method for a wireless network [FEATURE ID: 1]

comprising [TRANSITIVE ID: 2]

at least a base station [FEATURE ID: 1]

and a mobile station [FEATURE ID: 1]

, the wireless network employing [TRANSITIVE ID: 2]

a frame structure [FEATURE ID: 3]

of multiple frames [FEATURE ID: 4]

for transmission [FEATURE ID: 4]

, each frame comprising a plurality of time intervals [FEATURE ID: 4]

, each time interval [FEATURE ID: 5]

comprising a plurality of orthogonal frequency division multiplexing ( OFDM ) symbols , and each OFDM symbol [FEATURE ID: 6]

containing [TRANSITIVE ID: 2]

a plurality of frequency subcarriers [FEATURE ID: 7]

, the method [FEATURE ID: 8]

comprising : assigning [TRANSITIVE ID: 2]

an identifier [FEATURE ID: 9]

to the mobile station ; transmitting [TRANSITIVE ID: 2]

a signal [FEATURE ID: 5]

containing information [FEATURE ID: 4]

from the base station to the mobile station over a segment of time - frequency resource , the segment having [TRANSITIVE ID: 2]

a starting time - frequency coordinate and the segment comprising N time - frequency resource units within a time interval , each unit containing a set [FEATURE ID: 3]

of frequency subcarriers in a group [FEATURE ID: 3]

of OFDM symbols [FEATURE ID: 10]

, where N = 2 , 4 , or 8 ; and receiving [TRANSITIVE ID: 11]

by the mobile station the transmitted [TRANSITIVE ID: 12]

signal ; and recovering [TRANSITIVE ID: 11]

by the mobile station the information from the received [TRANSITIVE ID: 13]

signal based on the starting time - frequency coordinate and N in conjunction with the identifier assigned to the mobile station . 2 . The method of claim [FEATURE ID: 14]

1 , wherein the starting time - frequency coordinate indicates a starting OFDM symbol of the segment of time - frequency resource . 3 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting subcarrier [FEATURE ID: 5]

of the segment of time - frequency resource . 4 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting group of subcarriers [FEATURE ID: 4]

of the segment of time - frequency resource . 5 . The method of claim 1 , wherein modular coding [FEATURE ID: 15]

is applied to the time - frequency resource units in the segment of time - frequency resource . 6 . The method of claim 5 , wherein a repetition coding [FEATURE ID: 15]

is further [FEATURE ID: 16]

applied to the time - frequence resource units . 7 . A mobile device [FEATURE ID: 1]

1 . A method [FEATURE ID: 3]

of transmitting [TRANSITIVE ID: 2]

data signals [FEATURE ID: 4]

from at least two transmitting terminals [FEATURE ID: 7]

, with each having [TRANSITIVE ID: 2]

at least one transmitting means [FEATURE ID: 1]

, to at least one receiving [TRANSITIVE ID: 1]

terminal [FEATURE ID: 1]

having a spatial diversity [FEATURE ID: 5]

receiving means , the method comprising [TRANSITIVE ID: 2]

: transmitting from the transmitting terminals transformed [TRANSITIVE ID: 12]

data signals , being [TRANSITIVE ID: 2]

transformed versions [FEATURE ID: 7]

of respective data signals [FEATURE ID: 4]

, wherein spectra [FEATURE ID: 4]

of the transformed data signals are at least partly overlapping ; receiving on the spatial diversity means [TRANSITIVE ID: 1]

received [TRANSITIVE ID: 13]

data signals , wherein the received data signals are each a function of one of the transformed data signals ; subband processing [FEATURE ID: 11]

of the received data signals in the receiving terminal ; and determining estimates [FEATURE ID: 7]

of the respective data signals , on a subband [FEATURE ID: 6]

by subband basis [FEATURE ID: 6]

, from the subband processed received data signals in the receiving terminal , wherein said determining includes , for at least one data signal [FEATURE ID: 5]

: selecting from the data signals a selected data signal ; determining an estimate [FEATURE ID: 9]

of the selected data signal from the subband processed received data signals ; modifying the subband processed received data signals based on the estimate of the selected data signal ; and determining estimates of the remaining data signals from the modified subband processed received data signals . 2 . The method of claim [FEATURE ID: 14]

1 , wherein the transmitting is substantially simultaneous . 3 . The method of claim 1 , wherein selecting a data signal is based on the receiving power of the data signals . 4 . The method of claim 1 , wherein selecting a data signal is based on the interference ratio of the data signals . 5 . The method of claim 1 , wherein selecting a data signal is based on the interference ratio of the data signals . 6 . The method of claim 1 , wherein the subbands [FEATURE ID: 4]

, being involved in the subband processing , are grouped into sets [FEATURE ID: 10]

, at least one set comprising at least two subbands ; and wherein determining the estimates of the data signals in the receiving terminal [FEATURE ID: 8]

comprises : determining relations between the data signals and subband processed received data signals on a set - by - set basis ; and exploiting the relations between the data signals and the subband processed received data signals for determining the data signals . 7 . The method of claim 1 , wherein the transformation of the data signals to transformed data signals comprises inverse subband processing [FEATURE ID: 15]

. 8 . The method of claim 1 , wherein determining estimates of the data signals from subband processed received data signals in the receiving terminal comprises : determining intermediate estimates [FEATURE ID: 7]

of the data signals from the subband processed received data signals in the receiving terminal ; and obtaining the estimates of the data signals by inverse subband [FEATURE ID: 16]

processing the intermediate estimates . 9 . The method of claim 1 , wherein the transformation of the data signals to transmitted data signals further comprises guard interval introduction [FEATURE ID: 15]

. 10 . The method of claim 1 , wherein the subband processing comprises orthogonal frequency division demultiplexing [FEATURE ID: 15]

. 11 . The method of claim 7 , wherein the inverse subband processing comprises orthogonal frequency division multiplexing . 12 . The method of claim 1 , wherein the determining of the data signals is essentially based on the distinct spatial signatures of the received data signals . 13 . A method of transmitting data signals from a transmitting terminal having a spatially diverse transmitting means comprising at least two transmitting means to at least two receiving terminals , the method comprising : providing at least two data signals at the transmitting terminal ; determining at least two combined data signals in the transmitting terminal , the combined data signals each being transformed versions of the data signals , wherein the combined data signals are adapted for facilitating estimation [FEATURE ID: 11]

of the data signals by the receiving terminals ; inverse subband processing each of the combined data signals ; transmitting one of the inverse subband processed combined data signals from each of the at least two transmitting means , wherein said inverse subband processed combined data signals form a different composite data signal [FEATURE ID: 3]

at each of said at least two receiving terminals ; receiving at each receiving terminal one of a plurality of composite data signals [FEATURE ID: 4]







Targeted Patent:

Patent: US10447450B2
Filed: 2005-09-28
Issued: 2019-10-15
Patent Holder: (Original Assignee) Neocific Inc     (Current Assignee) Neo Wireless LLC
Inventor(s): Xiaodong Li, Haiming Huang, Titus Lo, Ruifeng Wang

Title: Method and system for multi-carrier packet communication with reduced overhead

 
Cross Reference / Shared Meaning between the Lines		 Charted Against:

Patent: US6937592B1
Filed: 2000-09-01
Issued: 2005-08-30
Patent Holder: (Original Assignee) Intel Corp     (Current Assignee) ISOSPAN WIRELESS Inc ; Apple Inc ; Gigabit Wireless Inc
Inventor(s): Robert W. Heath, Jr., Rajeev Krishnamoorthy, Peroor K. Sebastian, Arogyaswami J. Paulraj

Title: Wireless communications system that supports multiple modes of operation
[FEATURE ID: 1] operating method, identifierapparatus, access, indication, address, allocation, method, attribute[FEATURE ID: 1] mode determination logic, input
[FEATURE ID: 2] wireless network, base station, mobile station, method, segment, mobile devicetransceiver, node, transmitter, receiver, device, radio, network[FEATURE ID: 2] wireless communications system, base transceiver station, subscriber unit, determination logic, subscriber datastream, multiple access protocol
[TRANSITIVE ID: 3] comprising, employing, containing, havingusing, has, with, providing, defining, includes, comprises[TRANSITIVE ID: 3] comprising, utilizing, including
[FEATURE ID: 4] frame structure, set, groupplurality, combination, series, pair, grouping, collection, multiplicity[FEATURE ID: 4] group
[FEATURE ID: 5] multiple frames, time intervals, frequency subcarriers, information, subcarriersbits, channels, symbols, data, packets, cells, slots[FEATURE ID: 5] information, transmission, multiple access protocols
[FEATURE ID: 6] transmissioncommunication, data, channel, performance, transmitting, use, parameter[FEATURE ID: 6] signal, transmission characteristic, system conditions
[FEATURE ID: 7] time interval, OFDM symbolchannel, signal, block, slot, time, symbol, tone[FEATURE ID: 7] delay, post-processing signal
[TRANSITIVE ID: 8] assigning, transmitting, receivingsignaling, sending, delivering, providing, distributing, broadcasting, communicating[TRANSITIVE ID: 8] transmitting, determining
[FEATURE ID: 9] signal, receivedtransmission, first, channel, detected, radio, processed, resulting[FEATURE ID: 9] received
[TRANSITIVE ID: 10] transmittedtransferred, delivered, received, transmission, sent, broadcast[TRANSITIVE ID: 10] transmitted
[FEATURE ID: 11] conjunctioncorrespondence, accordance, concert, comparison, use, reference, connection[FEATURE ID: 11] communication, response
[FEATURE ID: 12] claimaspect, paragraph, statement, clause, embodiment, requirement, figure[FEATURE ID: 12] claim
[FEATURE ID: 13] subcarriersymbol, gain, energy, carrier, time, noise, code[FEATURE ID: 13] noise ratio, square error
[FEATURE ID: 14] modular codingdiversity, power, statistics, dispersion, bandwidth, rate, fading[FEATURE ID: 14] non-spatial multiplexing, residual inter-symbol interference, coherence time, path loss
1 . An operating method [FEATURE ID: 1]

for a wireless network [FEATURE ID: 2]

comprising [TRANSITIVE ID: 3]

at least a base station [FEATURE ID: 2]

and a mobile station [FEATURE ID: 2]

, the wireless network employing [TRANSITIVE ID: 3]

a frame structure [FEATURE ID: 4]

of multiple frames [FEATURE ID: 5]

for transmission [FEATURE ID: 6]

, each frame comprising a plurality of time intervals [FEATURE ID: 5]

, each time interval [FEATURE ID: 7]

comprising a plurality of orthogonal frequency division multiplexing ( OFDM ) symbols , and each OFDM symbol [FEATURE ID: 7]

containing [TRANSITIVE ID: 3]

a plurality of frequency subcarriers [FEATURE ID: 5]

, the method [FEATURE ID: 2]

comprising : assigning [TRANSITIVE ID: 8]

an identifier [FEATURE ID: 1]

to the mobile station ; transmitting [TRANSITIVE ID: 8]

a signal [FEATURE ID: 9]

containing information [FEATURE ID: 5]

from the base station to the mobile station over a segment [FEATURE ID: 2]

of time - frequency resource , the segment having [TRANSITIVE ID: 3]

a starting time - frequency coordinate and the segment comprising N time - frequency resource units within a time interval , each unit containing a set [FEATURE ID: 4]

of frequency subcarriers in a group [FEATURE ID: 4]

of OFDM symbols , where N = 2 , 4 , or 8 ; and receiving [TRANSITIVE ID: 8]

by the mobile station the transmitted [TRANSITIVE ID: 10]

signal ; and recovering by the mobile station the information from the received [TRANSITIVE ID: 9]

signal based on the starting time - frequency coordinate and N in conjunction [FEATURE ID: 11]

with the identifier assigned to the mobile station . 2 . The method of claim [FEATURE ID: 12]

1 , wherein the starting time - frequency coordinate indicates a starting OFDM symbol of the segment of time - frequency resource . 3 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting subcarrier [FEATURE ID: 13]

of the segment of time - frequency resource . 4 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting group of subcarriers [FEATURE ID: 5]

of the segment of time - frequency resource . 5 . The method of claim 1 , wherein modular coding [FEATURE ID: 14]

is applied to the time - frequency resource units in the segment of time - frequency resource . 6 . The method of claim 5 , wherein a repetition coding is further applied to the time - frequence resource units . 7 . A mobile device [FEATURE ID: 2]

1 . A wireless communications system [FEATURE ID: 2]

for transmitting [TRANSITIVE ID: 8]

information [FEATURE ID: 5]

between a base transceiver station [FEATURE ID: 2]

and a subscriber unit [FEATURE ID: 2]

comprising [TRANSITIVE ID: 3]

: rode determination logic [FEATURE ID: 2]

, in communication [FEATURE ID: 11]

with said base transceiver station and said subscriber unit , for determining [TRANSITIVE ID: 8]

, in response [FEATURE ID: 11]

to a received [TRANSITIVE ID: 9]

signal [FEATURE ID: 6]

, if a subscriber datastream [FEATURE ID: 2]

should be transmitted [TRANSITIVE ID: 10]

between said base transceiver station and said subscriber unit utilizing [TRANSITIVE ID: 3]

spatial multiplexing or non-spatial multiplexing [FEATURE ID: 14]

, the mode determination logic [FEATURE ID: 1]

including [TRANSITIVE ID: 3]

: a comparator ( s ) logic to compare a delay [FEATURE ID: 7]

spread measure for said received signal to a delay spread threshold ; and a selector ( s ) to select spatial multiplexing for transmission [FEATURE ID: 5]

of said subscriber datastream if said delay spread measure is below said delay spread thresholds . 2 . The wireless communications system of claim [FEATURE ID: 12]

1 wherein said mode determination logic has an input [FEATURE ID: 1]

for receiving a measure of a transmission characteristic [FEATURE ID: 6]

related to said received signal . 3 . The wireless communications system of claim 2 wherein said mode determination logic includes logic for : comparing said measured transmission characteristic to a transmission characteristic threshold ; and selecting one of spatial multiplexing and non-spatial multiplexing in response to said comparison of said measured transmission characteristic to said transmission characteristic threshold . 4 . The wireless communications system of claim 3 wherein said transmission characteristic threshold varies in response to system conditions [FEATURE ID: 6]

. 5 . The wireless communications system of claim 2 wherein said transmission characteristic includes at least one of : delay spread ; post-processing signal [FEATURE ID: 7]

- to - noise ratio [FEATURE ID: 13]

; cyclical redundancy check ( CRC ) failure ; residual inter-symbol interference [FEATURE ID: 14]

; mean square error [FEATURE ID: 13]

; coherence time [FEATURE ID: 14]

; or path loss [FEATURE ID: 14]

. 6 . The wireless communications system of claim 1 wherein said base transceiver station and said subscriber unit utilize a multiple access protocol [FEATURE ID: 2]

to transmit said subscriber datastream , wherein said multiple access protocol is selected from at least one of a group [FEATURE ID: 4]

of multiple access protocols [FEATURE ID: 5]







Targeted Patent:

Patent: US10447450B2
Filed: 2005-09-28
Issued: 2019-10-15
Patent Holder: (Original Assignee) Neocific Inc     (Current Assignee) Neo Wireless LLC
Inventor(s): Xiaodong Li, Haiming Huang, Titus Lo, Ruifeng Wang

Title: Method and system for multi-carrier packet communication with reduced overhead

 
Cross Reference / Shared Meaning between the Lines		 Charted Against:

Patent: US6937557B1
Filed: 1999-08-27
Issued: 2005-08-30
Patent Holder: (Original Assignee) Matsushita Electric Industrial Co Ltd     (Current Assignee) Panasonic Intellectual Property Corp of America
Inventor(s): Hiroaki Sudo

Title: OFDM communication apparatus
[FEATURE ID: 1] operating method, base station, identifier, mobile deviceobject, antenna, arrangement, system, transceiver, aspect, element[FEATURE ID: 1] OFDM communication apparatus, OFDM communication method
[FEATURE ID: 2] wireless network, mobile stationreceiver, device, transceiver, modem, controller, node, station[FEATURE ID: 2] transmitter, branch, apparatus, modulator, second transmitter, OFDM communication terminal apparatus, communication terminal apparatus, base station apparatus
[TRANSITIVE ID: 3] comprising, employing, containing, havingusing, including, providing, comprises, has, includes, with[TRANSITIVE ID: 3] having, comprising
[FEATURE ID: 4] frame structure, starting timeperiod, combination, phase, plurality, series, duration, first[FEATURE ID: 4] case, set
[FEATURE ID: 5] multiple frames, transmission, time intervals, frequency subcarriers, information, OFDM symbolssymbols, bits, data, packets, channels, resources, cells[FEATURE ID: 5] signals, subcarriers
[FEATURE ID: 6] OFDM symbol, set, groupsegment, pair, plurality, collection, section, succession, row[FEATURE ID: 6] first subcarrier
[FEATURE ID: 7] methodmethod further, procedure, methods, apparatus, first method, communication[FEATURE ID: 7] method
[TRANSITIVE ID: 8] transmittedcorresponding, information, transmission, received, encoded, data[TRANSITIVE ID: 8] modulated
[TRANSITIVE ID: 9] receivedtransmission, first, second, receiver[TRANSITIVE ID: 9] first transmitter
[FEATURE ID: 10] conjunctionaccordance, comparison, relationship, use[FEATURE ID: 10] respect
[FEATURE ID: 11] claimitem, invention, embodiment, paragraph, statement, aspect, claims[FEATURE ID: 11] claim
[FEATURE ID: 12] subcarrierscarriers, channels, terminals, antennas, units[FEATURE ID: 12] transmitters
[FEATURE ID: 13] furthersimultaneously, only, sequentially, independently, directly, separately, repeatedly[FEATURE ID: 13] arranged
1 . An operating method [FEATURE ID: 1]

for a wireless network [FEATURE ID: 2]

comprising [TRANSITIVE ID: 3]

at least a base station [FEATURE ID: 1]

and a mobile station [FEATURE ID: 2]

, the wireless network employing [TRANSITIVE ID: 3]

a frame structure [FEATURE ID: 4]

of multiple frames [FEATURE ID: 5]

for transmission [FEATURE ID: 5]

, each frame comprising a plurality of time intervals [FEATURE ID: 5]

, each time interval comprising a plurality of orthogonal frequency division multiplexing ( OFDM ) symbols , and each OFDM symbol [FEATURE ID: 6]

containing [TRANSITIVE ID: 3]

a plurality of frequency subcarriers [FEATURE ID: 5]

, the method [FEATURE ID: 7]

comprising : assigning an identifier [FEATURE ID: 1]

to the mobile station ; transmitting a signal containing information [FEATURE ID: 5]

from the base station to the mobile station over a segment of time - frequency resource , the segment having [TRANSITIVE ID: 3]

a starting time [FEATURE ID: 4]

- frequency coordinate and the segment comprising N time - frequency resource units within a time interval , each unit containing a set [FEATURE ID: 6]

of frequency subcarriers in a group [FEATURE ID: 6]

of OFDM symbols [FEATURE ID: 5]

, where N = 2 , 4 , or 8 ; and receiving by the mobile station the transmitted [TRANSITIVE ID: 8]

signal ; and recovering by the mobile station the information from the received [TRANSITIVE ID: 9]

signal based on the starting time - frequency coordinate and N in conjunction [FEATURE ID: 10]

with the identifier assigned to the mobile station . 2 . The method of claim [FEATURE ID: 11]

1 , wherein the starting time - frequency coordinate indicates a starting OFDM symbol of the segment of time - frequency resource . 3 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting subcarrier of the segment of time - frequency resource . 4 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting group of subcarriers [FEATURE ID: 12]

of the segment of time - frequency resource . 5 . The method of claim 1 , wherein modular coding is applied to the time - frequency resource units in the segment of time - frequency resource . 6 . The method of claim 5 , wherein a repetition coding is further [FEATURE ID: 13]

applied to the time - frequence resource units . 7 . A mobile device [FEATURE ID: 1]

1 . An OFDM communication apparatus [FEATURE ID: 1]

having [TRANSITIVE ID: 3]

a plurality of transmitters [FEATURE ID: 12]

that transmit or retransmit a plurality of modulated [TRANSITIVE ID: 8]

signals [FEATURE ID: 5]

, each corresponding to one of a plurality of subcarriers [FEATURE ID: 5]

, simultaneously from a plurality of branches , each transmitter [FEATURE ID: 2]

having one of the plurality of branches as a corresponding branch [FEATURE ID: 2]

and transmits or retransmits one of the modulated signals arranged [TRANSITIVE ID: 13]

on one of the plurality of subcarriers from the corresponding branch , the apparatus [FEATURE ID: 2]

comprising [TRANSITIVE ID: 3]

: a modulator [FEATURE ID: 2]

that modulates a plurality of signals to generate the plurality of modulated signals ; and a selector that : ( 1 ) selects , with respect [FEATURE ID: 10]

to a first branch and a second branch of the plurality of branches , a first modulated signal to be arranged on a first subcarrier [FEATURE ID: 6]

of the plurality of subcarriers from among the plurality modulated signals , the first branch and the second branch being different from each other , ( 2 ) outputs the first modulated signal to a first transmitter [FEATURE ID: 9]

of the plurality of transmitters in a case [FEATURE ID: 4]

of transmitting the plurality of modulated signals , the first transmitter having the first branch as the corresponding branch , and ( 3 ) outputs the first modulated signal to a second transmitter [FEATURE ID: 2]

of the plurality of transmitters in a case of retransmitting the plurality of modulated signals , the second transmitter having the second branch as the corresponding branch . 2 . The OFDM communication apparatus according to claim [FEATURE ID: 11]

1 , wherein the selector comprises : a first selector that outputs the first modulated signal with respect to the first branch in both cases of transmitting and retransmitting the plurality of modulated signals ; a second selector that outputs the first modulated signal with respect to the second branch in both cases of transmitting and retransmitting the plurality of modulated signals ; and a third selector that outputs , among outputs of the first selector and the second selector , the outputs of the first selector to the first transmitter in the case of transmitting the plurality of modulated signals , and outputs , among the outputs of the first selector and the second selector , the outputs of the second selector to the second transmitter in the case of retransmitting the plurality of modulated signals . 3 . The OFDM communication terminal apparatus [FEATURE ID: 2]

according to claim 2 , wherein the first selector and the second selector output a set [FEATURE ID: 4]

of modulated signals as the first modulated signal , the set of modulated signals corresponding to a set of subcarriers , the set of subcarriers consisting of either one of odd - numbered subcarriers and even - numbered subcarriers . 4 . A communication terminal apparatus [FEATURE ID: 2]

comprising the OFDM communication apparatus according to claim 1 . 5 . A base station apparatus [FEATURE ID: 2]

comprising the OFDM communication apparatus according to claim 1 . 6 . An OFDM communication method [FEATURE ID: 1]

to be used in an OFDM communication apparatus having a-plurality of transmitters that transmit or retransmit a plurality of modulated signals , each corresponding to one of a plurality of subcarriers , simultaneously from a plurality of branches , each transmitter having one of the plurality of branches as a corresponding branch and transmits or retransmits one of the modulated signals arranged on one of the plurality of subcarriers from the corresponding branch , the method [FEATURE ID: 7]







Targeted Patent:

Patent: US10447450B2
Filed: 2005-09-28
Issued: 2019-10-15
Patent Holder: (Original Assignee) Neocific Inc     (Current Assignee) Neo Wireless LLC
Inventor(s): Xiaodong Li, Haiming Huang, Titus Lo, Ruifeng Wang

Title: Method and system for multi-carrier packet communication with reduced overhead

 
Cross Reference / Shared Meaning between the Lines		 Charted Against:

Patent: US20050185733A1
Filed: 2004-02-20
Issued: 2005-08-25
Patent Holder: (Original Assignee) Nokia Oyj     (Current Assignee) Nokia Oyj
Inventor(s): Antti Tolli, Marian Codreanu

Title: Data transmission method, communication system, base station and transceiver
[FEATURE ID: 1] wireless network, base station, mobile station, method, received, mobile devicenetwork, receiver, system, transmitter, transceiver, radio, transmission[FEATURE ID: 1] data transmission method
[TRANSITIVE ID: 2] comprising, havinginvolving, providing, with, of, by, featuring, employing[TRANSITIVE ID: 2] utilizing, comprising, using
[TRANSITIVE ID: 3] employing, receiving, recoveringdetermining, generating, detecting, obtaining, acquiring, establishing, transmitting[TRANSITIVE ID: 3] estimating
[FEATURE ID: 4] frame structure, OFDM symbol, setplurality, pattern, series, structure, protocol, transmission, system[FEATURE ID: 4] method, frame format
[FEATURE ID: 5] multiple frames, time intervals, frequency subcarriers, OFDM symbols, subcarrierschannels, symbols, data, components, bits, values, cells[FEATURE ID: 5] transmission parameters, channel parameters, level, transceivers
[FEATURE ID: 6] transmission, frame, information, segment, unit, subcarrier, repetition codingcommunication, data, channel, sequence, slot, period, message[FEATURE ID: 6] signal, transmission power, transmissions, frame
[FEATURE ID: 7] time intervalchannel, transmission, stream, subframe, symbol, slot, bit[FEATURE ID: 7] bit error rate, subcarrier
[TRANSITIVE ID: 8] containingcomprising, being, including, defining[TRANSITIVE ID: 8] depicting
[TRANSITIVE ID: 9] assigning, transmittingproviding, receiving, generating, delivering, communicating, issuing, sending[TRANSITIVE ID: 9] transmitting, comparing
[FEATURE ID: 10] signalsignals, data, transmission, channel[FEATURE ID: 10] measurement
[FEATURE ID: 11] starting timeduration, timing, frequency, phase[FEATURE ID: 11] modulation
[FEATURE ID: 12] groupcorresponding, unit, range, multiple, number[FEATURE ID: 12] respective bit error rate value
[TRANSITIVE ID: 13] transmitted, modular codingresulting, wireless, superposition, delivered, synchronization, redundancy, polarization[TRANSITIVE ID: 13] time division duplex, received
[FEATURE ID: 14] conjunctioncombination, relationship, reference, communication, connection[FEATURE ID: 14] comparison
[FEATURE ID: 15] claimitem, paragraph, clause, figure, clair, embodiment[FEATURE ID: 15] claim
1 . An operating method for a wireless network [FEATURE ID: 1]

comprising [TRANSITIVE ID: 2]

at least a base station [FEATURE ID: 1]

and a mobile station [FEATURE ID: 1]

, the wireless network employing [TRANSITIVE ID: 3]

a frame structure [FEATURE ID: 4]

of multiple frames [FEATURE ID: 5]

for transmission [FEATURE ID: 6]

, each frame [FEATURE ID: 6]

comprising a plurality of time intervals [FEATURE ID: 5]

, each time interval [FEATURE ID: 7]

comprising a plurality of orthogonal frequency division multiplexing ( OFDM ) symbols , and each OFDM symbol [FEATURE ID: 4]

containing [TRANSITIVE ID: 8]

a plurality of frequency subcarriers [FEATURE ID: 5]

, the method [FEATURE ID: 1]

comprising : assigning [TRANSITIVE ID: 9]

an identifier to the mobile station ; transmitting [TRANSITIVE ID: 9]

a signal [FEATURE ID: 10]

containing information [FEATURE ID: 6]

from the base station to the mobile station over a segment [FEATURE ID: 6]

of time - frequency resource , the segment having [TRANSITIVE ID: 2]

a starting time [FEATURE ID: 11]

- frequency coordinate and the segment comprising N time - frequency resource units within a time interval , each unit [FEATURE ID: 6]

containing a set [FEATURE ID: 4]

of frequency subcarriers in a group [FEATURE ID: 12]

of OFDM symbols [FEATURE ID: 5]

, where N = 2 , 4 , or 8 ; and receiving [TRANSITIVE ID: 3]

by the mobile station the transmitted [TRANSITIVE ID: 13]

signal ; and recovering [TRANSITIVE ID: 3]

by the mobile station the information from the received [TRANSITIVE ID: 1]

signal based on the starting time - frequency coordinate and N in conjunction [FEATURE ID: 14]

with the identifier assigned to the mobile station . 2 . The method of claim [FEATURE ID: 15]

1 , wherein the starting time - frequency coordinate indicates a starting OFDM symbol of the segment of time - frequency resource . 3 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting subcarrier [FEATURE ID: 6]

of the segment of time - frequency resource . 4 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting group of subcarriers [FEATURE ID: 5]

of the segment of time - frequency resource . 5 . The method of claim 1 , wherein modular coding [FEATURE ID: 13]

is applied to the time - frequency resource units in the segment of time - frequency resource . 6 . The method of claim 5 , wherein a repetition coding [FEATURE ID: 6]

is further applied to the time - frequence resource units . 7 . A mobile device [FEATURE ID: 1]

1 . A data transmission method [FEATURE ID: 1]

utilizing [TRANSITIVE ID: 2]

time division duplex [FEATURE ID: 13]

between a first and a second transceiver , the method [FEATURE ID: 4]

comprising [TRANSITIVE ID: 2]

: transmitting [TRANSITIVE ID: 9]

a signal [FEATURE ID: 6]

from the first transceiver to the second transceiver using [TRANSITIVE ID: 2]

given transmission parameters [FEATURE ID: 5]

; estimating [TRANSITIVE ID: 3]

, with the second transceiver , a signal quality metric from the signal received [TRANSITIVE ID: 13]

from the first transceiver , the metric depicting [TRANSITIVE ID: 8]

signal quality degradation caused by interference ; comparing [TRANSITIVE ID: 9]

, with the second transceiver , the estimated metric to a target metric ; determining , with the second transceiver , an offset value on the basis of the comparison [FEATURE ID: 14]

; transmitting , with the second transceiver , the offset value to the first transceiver ; adjusting , with the first transceiver , transmission parameters on the basis of the offset value ; and transmitting , with the first transceiver , a signal to the second transceiver using the adjusted transmission parameters . 2 . A data transmission method utilizing time division duplex between a first and a second transceiver , the method comprising : measuring , with the first transceiver , channel parameters [FEATURE ID: 5]

from a signal transmitted by the second transceiver ; selecting , with the first transceiver , transmission parameters on the basis of the measurement [FEATURE ID: 10]

; transmitting a signal from the first transceiver to the second transceiver using the selected transmission parameters ; estimating , with the second transceiver , estimating a signal quality metric from the signal received from the first transceiver , the metric depicting signal quality degradation caused by interference ; comparing , with the second transceiver , the estimated metric to a target metric ; determining , with the second transceiver , an offset value on the basis of the comparison ; transmitting , with the second transceiver , the offset value to the first transceiver ; adjusting , with the first transceiver , transmission parameters on the basis of the offset value ; and transmitting , with the first transceiver , a signal to the second transceiver using the adjusted transmission parameters . 3 . The method of claim [FEATURE ID: 15]

1 , further comprising : selecting the transmission parameters to comprise at least one of transmission power [FEATURE ID: 6]

, coding , and modulation [FEATURE ID: 11]

. 4 . The method of claim 2 , further comprising : determining in the first transceiver a target signal quality metric on the basis of the measured channel parameters ; and , transmitting the target metric to the second transceiver . 5 . The method of claim 1 , further comprising : choosing the target metric to comprise at least one of a frame error rate value , a bit error rate value , and a raw bit error rate value . 6 . The method of claim 1 , further comprising : selecting the offset value to include a command to change the transmission parameters when the target metric and the estimated metric differ from each other by more than a given hysteresis value . 7 . The method of claim 1 , further comprising : selecting the offset value to include a command not to change the transmission parameters when the target metric and the estimated metric differ from each other by less than a given hysteresis value . 8 . The method of claim 1 , further comprising : selecting the offset value to comprise a stepwise command to perform at least one of increasing transmission power and decreasing transmission power . 9 . The method of claim 5 , further comprising : using the second transceiver to estimate a bit error rate [FEATURE ID: 7]

of the received signal , to convert the target frame error rate value to a respective bit error rate value [FEATURE ID: 12]

, and to compare the estimated bit error rate to the respective bit error rate value to produce the offset value , 10 . The method of claim 1 , further comprising : using the second transceiver to measure the interference level of the received signal , and to also utilize the measured level [FEATURE ID: 5]

in determining the offset value . 11 . The method of claim 1 , further comprising : formatting the transmissions [FEATURE ID: 6]

between the transceivers [FEATURE ID: 5]

in a frame format [FEATURE ID: 4]

; and measuring , with the second transceiver , the signal quality metric for each received frame [FEATURE ID: 6]

. 12 . The method of claim 1 , further comprising : utilizing more than one subcarrier [FEATURE ID: 7]







Targeted Patent:

Patent: US10447450B2
Filed: 2005-09-28
Issued: 2019-10-15
Patent Holder: (Original Assignee) Neocific Inc     (Current Assignee) Neo Wireless LLC
Inventor(s): Xiaodong Li, Haiming Huang, Titus Lo, Ruifeng Wang

Title: Method and system for multi-carrier packet communication with reduced overhead

 
Cross Reference / Shared Meaning between the Lines		 Charted Against:

Patent: US6928120B1
Filed: 2000-09-25
Issued: 2005-08-09
Patent Holder: (Original Assignee) Cingular Wireless II LLC     (Current Assignee) AT&T Mobility II LLC ; AT&T Wireless Services Inc
Inventor(s): Hongliang Zhang

Title: Methods and apparatus for use in reducing residual phase error in OFDM communication signals
[FEATURE ID: 1] wireless network, mobile station, frame structure, methodreceiver, system, device, modem, procedure, scheme, network[FEATURE ID: 1] method, slicer
[TRANSITIVE ID: 2] comprising, containing, transmittingproviding, using, carrying, including, includes, having, comprises[TRANSITIVE ID: 2] comprising, performing
[TRANSITIVE ID: 3] employingreceiving, reducing, applying, uses, providing, establishing, forming[TRANSITIVE ID: 3] use, determining
[FEATURE ID: 4] multiple frames, transmission, symbols, information, OFDM symbols, subcarriersdata, channels, bits, frames, packets, transmissions, codes[FEATURE ID: 4] communications signals, data symbols, information symbols, phases, OFDM communication signals, communication signals, OFDM communications signals
[FEATURE ID: 5] time intervalssymbols, samples, tones, channels[FEATURE ID: 5] pilot tones
[FEATURE ID: 6] time interval, subcarrier, repetition codingpilot, channel, sequence, symbol, code, slot, period[FEATURE ID: 6] pilot tone symbol
[FEATURE ID: 7] orthogonal frequency division multiplexingquadrature, frequency, orthogonal, frequency division[FEATURE ID: 7] orthogonal frequency division
[FEATURE ID: 8] OFDMof, os, od, ot, ff, orthogonal frequency, om[FEATURE ID: 8] OFDM
[FEATURE ID: 9] OFDM symbolsymbol, frequency, carrier, signal[FEATURE ID: 9] channel
[FEATURE ID: 10] frequency subcarrierssymbols, elements, components, values[FEATURE ID: 10] largest magnitudes
[TRANSITIVE ID: 11] assigning, having, receivingdetermining, providing, identifying, obtaining, indicating, detecting, measuring[TRANSITIVE ID: 11] reducing, calculating
[FEATURE ID: 12] signalburst, carrier, payload, preamble[FEATURE ID: 12] residual phase error
[FEATURE ID: 13] set, groupplurality, range, combination, portion, pair, collection, multiple[FEATURE ID: 13] subset
[TRANSITIVE ID: 14] recoveringderive, recover, extract, synthesize, identify, prepare, generating[TRANSITIVE ID: 14] generate, estimate
[FEATURE ID: 15] claimstep, formula, request claim, protection claim, the claim, requirement, embodiment[FEATURE ID: 15] claim
[FEATURE ID: 16] mobile devicedevice, processor, receiver, apparatus[FEATURE ID: 16] correction apparatus
1 . An operating method for a wireless network [FEATURE ID: 1]

comprising [TRANSITIVE ID: 2]

at least a base station and a mobile station [FEATURE ID: 1]

, the wireless network employing [TRANSITIVE ID: 3]

a frame structure [FEATURE ID: 1]

of multiple frames [FEATURE ID: 4]

for transmission [FEATURE ID: 4]

, each frame comprising a plurality of time intervals [FEATURE ID: 5]

, each time interval [FEATURE ID: 6]

comprising a plurality of orthogonal frequency division multiplexing [FEATURE ID: 7]

( OFDM [FEATURE ID: 8]

) symbols [FEATURE ID: 4]

, and each OFDM symbol [FEATURE ID: 9]

containing [TRANSITIVE ID: 2]

a plurality of frequency subcarriers [FEATURE ID: 10]

, the method [FEATURE ID: 1]

comprising : assigning [TRANSITIVE ID: 11]

an identifier to the mobile station ; transmitting [TRANSITIVE ID: 2]

a signal [FEATURE ID: 12]

containing information [FEATURE ID: 4]

from the base station to the mobile station over a segment of time - frequency resource , the segment having [TRANSITIVE ID: 11]

a starting time - frequency coordinate and the segment comprising N time - frequency resource units within a time interval , each unit containing a set [FEATURE ID: 13]

of frequency subcarriers in a group [FEATURE ID: 13]

of OFDM symbols [FEATURE ID: 4]

, where N = 2 , 4 , or 8 ; and receiving [TRANSITIVE ID: 11]

by the mobile station the transmitted signal ; and recovering [TRANSITIVE ID: 14]

by the mobile station the information from the received signal based on the starting time - frequency coordinate and N in conjunction with the identifier assigned to the mobile station . 2 . The method of claim [FEATURE ID: 15]

1 , wherein the starting time - frequency coordinate indicates a starting OFDM symbol of the segment of time - frequency resource . 3 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting subcarrier [FEATURE ID: 6]

of the segment of time - frequency resource . 4 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting group of subcarriers [FEATURE ID: 4]

of the segment of time - frequency resource . 5 . The method of claim 1 , wherein modular coding is applied to the time - frequency resource units in the segment of time - frequency resource . 6 . The method of claim 5 , wherein a repetition coding [FEATURE ID: 6]

is further applied to the time - frequence resource units . 7 . A mobile device [FEATURE ID: 16]

1 . A method [FEATURE ID: 1]

for use [FEATURE ID: 3]

in reducing [TRANSITIVE ID: 11]

a residual phase error [FEATURE ID: 12]

in orthogonal frequency division [FEATURE ID: 7]

multiplexed ( OFDM [FEATURE ID: 8]

) communications signals [FEATURE ID: 4]

, the method comprising [TRANSITIVE ID: 2]

: calculating [TRANSITIVE ID: 11]

a phase of each one of a plurality of channel [FEATURE ID: 9]

- compensated data symbols [FEATURE ID: 4]

to generate [TRANSITIVE ID: 14]

a plurality of data symbol phases ; performing [TRANSITIVE ID: 2]

a hard - decision on each one of the plurality of channel - compensated data symbols to estimate [TRANSITIVE ID: 14]

a plurality of information symbols [FEATURE ID: 4]

; calculating a phase difference between each data symbol phase and its associated information symbol phase to generate a plurality of phase differences ; and determining [TRANSITIVE ID: 3]

a residual phase error based on the plurality of phase differences . 2 . The method according to claim [FEATURE ID: 15]

1 , further comprising : correcting phases [FEATURE ID: 4]

of channel compensated data symbols based on the determined residual phase error . 3 . The method according to claim 1 , further comprising : correcting phases of OFDM communication signals [FEATURE ID: 4]

based on the determined residual phase error . 4 . The method according to claim 1 , further comprising : prior to calculating each data symbol phase and generating each information symbol , performing channel compensation on OFDM communication signals using a pilot tone symbol [FEATURE ID: 6]

received in the OFDM communication signals to generate the plurality of channel - compensated data symbols . 5 . The method according to claim 1 , wherein determining the residual phase error comprises determining the residual phase error without considering one or more of the largest magnitudes [FEATURE ID: 10]

in the plurality of phase differences . 6 . The method according to claim 1 , further comprising : using the one or more phase differences to generate an average phase difference ; and wherein determining the residual phase error comprises determining the residual phase error based on the average phase difference . 7 . The method according to claim 1 , further comprising : disregarding one or more of the largest magnitudes in the plurality of phase differences in selecting the one or more phase differences ; using the one or more phase differences to generate an average phase difference ; wherein determining the residual phase error comprises determining the residual phase error based on the average phase difference ; an correcting phases of channel compensated data symbols based on the determined residual phase error . 8 . A method for use in reducing a residual phase error in orthogonal frequency division multiplexed ( OFDM ) communication signals [FEATURE ID: 4]

, the method comprising : generating a plurality of channel - compensated data symbols by performing channel compensation on OFDM communications signals [FEATURE ID: 4]

using one or more pilot tones [FEATURE ID: 5]

; calculating a phase of each one of the plurality of channel - compensated data symbols to generate a plurality of data symbol phases ; performing a hard - decision on each one of the plurality of channel - compensated data symbols to estimate a plurality of information symbols ; calculating a phase of each one of the plurality of information symbols to generate a plurality of information symbol phases ; and calculating a phase difference between each data symbol phase and its associated information symbol phase to generate a plurality of phase differences . 9 . The method according to claim 8 , further comprising : selecting a subset [FEATURE ID: 13]

of phase differences from the plurality of phase differences that do not include one or more of the largest magnitudes in the plurality of phase differences ; using the subset of phase differences to generate an average phase difference ; determining a residual phase error based on the average phase difference ; and correcting phases of channel compensated data symbols based on the determined residual phase error . 10 . The method according to claim 8 , wherein calculating the phase of the plurality of channel - compensated data symbols is based on a four - quadrant inverse tangent function . 11 . The method according to claim 8 , wherein calculating the phase of the plurality of information symbols is based on a four - quadrant inverse tangent function . 12 . A residual phase error ( RPE ) correction apparatus [FEATURE ID: 16]

for orthogonal frequency division multiplexed ( OFDM ) communications signals , comprising : a first phase calculator to calculate a phase of each one of a plurality of channel - compensated data symbols to generate a plurality of data symbol phases ; a slicer [FEATURE ID: 1]







Targeted Patent:

Patent: US10447450B2
Filed: 2005-09-28
Issued: 2019-10-15
Patent Holder: (Original Assignee) Neocific Inc     (Current Assignee) Neo Wireless LLC
Inventor(s): Xiaodong Li, Haiming Huang, Titus Lo, Ruifeng Wang

Title: Method and system for multi-carrier packet communication with reduced overhead

 
Cross Reference / Shared Meaning between the Lines		 Charted Against:

Patent: US6925068B1
Filed: 1999-05-21
Issued: 2005-08-02
Patent Holder: (Original Assignee) WiLAN Inc     (Current Assignee) Quarterhill Inc
Inventor(s): Kenneth L. Stanwood, James F. Mollenauer, Israel Jay Klein, Sheldon L. Gilbert

Title: Method and apparatus for allocating bandwidth in a wireless communication system
[FEATURE ID: 1] operating methodoperation, architecture, protocol, algorithm, arrangement, approach, configuration[FEATURE ID: 1] scheme, user, time slot allocation approach
[FEATURE ID: 2] wireless network, base station, mobile station, time interval, mobile devicenetwork, system, modem, node, transceiver, channel, user[FEATURE ID: 2] communication link, link, communication system, service, wireless communication link
[TRANSITIVE ID: 3] comprising, containing, havingwith, including, involving, by, comprises, defining, incorporating[TRANSITIVE ID: 3] using, comprising
[TRANSITIVE ID: 4] employing, assigning, transmitting, recoveringgenerating, providing, establishing, receiving, defining, identifying, obtaining[TRANSITIVE ID: 4] duplexing, predicting, setting
[FEATURE ID: 5] frame structure, OFDM symbol, set, group, subcarriersegment, combination, plurality, pattern, unit, slot, sequence[FEATURE ID: 5] method, period, frame
[FEATURE ID: 6] multiple frames, time intervals, frequency subcarriers, signal, information, OFDM symbols, subcarriersdata, channels, signals, symbols, bits, packets, resources[FEATURE ID: 6] transmissions, uplink time slots, time, uplink transmissions, requests, downlink time slot allocations, N time slots
[FEATURE ID: 7] transmission, receivingcommunication, transmitting, monitoring, determining, listening, time, signalling[FEATURE ID: 7] monitoring bandwidth usage, bandwidth requests
[FEATURE ID: 8] methodmethods, action, following, process, procedure, step[FEATURE ID: 8] steps
[FEATURE ID: 9] segmentburst, predetermined, frame, slot[FEATURE ID: 9] time division
[TRANSITIVE ID: 10] transmitted, receivedsent, transferred, modulated, broadcast, transmission, first, emitted[TRANSITIVE ID: 10] communicated
[FEATURE ID: 11] conjunctioncorrespondence, parallel, comparison, conformance, relationship, conformity, accordance[FEATURE ID: 11] response
[FEATURE ID: 12] claimstep, feature, the claim, requirement, embodiment, clause, paragraph[FEATURE ID: 12] claim
[FEATURE ID: 13] furthersimultaneously, also, subsequently, not, then, only[FEATURE ID: 13] downlink transmissions
1 . An operating method [FEATURE ID: 1]

for a wireless network [FEATURE ID: 2]

comprising [TRANSITIVE ID: 3]

at least a base station [FEATURE ID: 2]

and a mobile station [FEATURE ID: 2]

, the wireless network employing [TRANSITIVE ID: 4]

a frame structure [FEATURE ID: 5]

of multiple frames [FEATURE ID: 6]

for transmission [FEATURE ID: 7]

, each frame comprising a plurality of time intervals [FEATURE ID: 6]

, each time interval [FEATURE ID: 2]

comprising a plurality of orthogonal frequency division multiplexing ( OFDM ) symbols , and each OFDM symbol [FEATURE ID: 5]

containing [TRANSITIVE ID: 3]

a plurality of frequency subcarriers [FEATURE ID: 6]

, the method [FEATURE ID: 8]

comprising : assigning [TRANSITIVE ID: 4]

an identifier to the mobile station ; transmitting [TRANSITIVE ID: 4]

a signal [FEATURE ID: 6]

containing information [FEATURE ID: 6]

from the base station to the mobile station over a segment [FEATURE ID: 9]

of time - frequency resource , the segment having [TRANSITIVE ID: 3]

a starting time - frequency coordinate and the segment comprising N time - frequency resource units within a time interval , each unit containing a set [FEATURE ID: 5]

of frequency subcarriers in a group [FEATURE ID: 5]

of OFDM symbols [FEATURE ID: 6]

, where N = 2 , 4 , or 8 ; and receiving [TRANSITIVE ID: 7]

by the mobile station the transmitted [TRANSITIVE ID: 10]

signal ; and recovering [TRANSITIVE ID: 4]

by the mobile station the information from the received [TRANSITIVE ID: 10]

signal based on the starting time - frequency coordinate and N in conjunction [FEATURE ID: 11]

with the identifier assigned to the mobile station . 2 . The method of claim [FEATURE ID: 12]

1 , wherein the starting time - frequency coordinate indicates a starting OFDM symbol of the segment of time - frequency resource . 3 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting subcarrier [FEATURE ID: 5]

of the segment of time - frequency resource . 4 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting group of subcarriers [FEATURE ID: 6]

of the segment of time - frequency resource . 5 . The method of claim 1 , wherein modular coding is applied to the time - frequency resource units in the segment of time - frequency resource . 6 . The method of claim 5 , wherein a repetition coding is further [FEATURE ID: 13]

applied to the time - frequence resource units . 7 . A mobile device [FEATURE ID: 2]

1 . A method [FEATURE ID: 5]

for adaptively duplexing [TRANSITIVE ID: 4]

transmissions [FEATURE ID: 6]

in a communication link [FEATURE ID: 2]

using [TRANSITIVE ID: 3]

a time division [FEATURE ID: 9]

duplexing scheme [FEATURE ID: 1]

wherein transmissions are communicated [TRANSITIVE ID: 10]

in an uplink direction during uplink time slots [FEATURE ID: 6]

and wherein transmissions are communicated in a downlink direction during downlink time slots , comprising [TRANSITIVE ID: 3]

the steps [FEATURE ID: 8]

of : ( a ) monitoring bandwidth usage [FEATURE ID: 7]

in the communication link over a period [FEATURE ID: 5]

of time [FEATURE ID: 6]

to determine uplink and downlink bandwidth utilization parameters ; ( b ) predicting [TRANSITIVE ID: 4]

an uplink bandwidth requirement and a downlink bandwidth requirement of the communication link , wherein the uplink and downlink bandwidth requirements are predicted using the uplink and downlink bandwidth utilization parameters ; ( c ) setting [TRANSITIVE ID: 4]

an uplink / downlink bandwidth requirement ratio based upon the uplink and downlink bandwidth requirements of the link [FEATURE ID: 2]

; ( d ) allocating uplink and downlink time slots in a frame [FEATURE ID: 5]

with the set uplink / downlink ratio in response [FEATURE ID: 11]

to bandwidth requests [FEATURE ID: 7]

; and ( e ) enabling uplink transmissions [FEATURE ID: 6]

during the allocated uplink time slots and downlink transmissions [FEATURE ID: 13]

during the allocated downlink time slots . 2 . The method of claim [FEATURE ID: 12]

1 , wherein the uplink and downlink bandwidth requirements are initially determined when the link is installed in the communication system [FEATURE ID: 2]

. 3 . The method of claim 1 , wherein the uplink and downlink bandwidth requirements are determined by periodically monitoring the bandwidth utilization parameters for uplink and downlink transmissions in the communication link . 4 . The method of claim 1 , wherein the uplink and downlink bandwidth requirements are determined by periodically monitoring requests [FEATURE ID: 6]

for uplink and downlink transmissions in the communication link . 5 . The method of claim 1 , wherein the bandwidth requirements are periodically determined and the associated uplink / downlink bandwidth requirement ratio for the link is periodically updated , and wherein the uplink and downlink time slot allocations [FEATURE ID: 6]

are updated periodically in response to the updated uplink / downlink bandwidth ratio . 6 . The method of claim 5 , wherein the uplink and downlink bandwidth requirements are periodically determined by continuously monitoring the transmissions in the communication link . 7 . The method of claim 1 , wherein the uplink and downlink bandwidth requirements vary depending upon the type of service [FEATURE ID: 2]

provided over the communication link . 8 . The method of claim 1 , wherein the uplink and downlink bandwidth requirements vary depending upon the type of user [FEATURE ID: 1]

of the communication link . 9 . The method of claim 1 , wherein the communication link comprises a wireless communication link [FEATURE ID: 2]

. 10 . The method of claim 1 , wherein the uplink and downlink time slots are dynamically allocated using a frame - based time slot allocation approach [FEATURE ID: 1]

. 11 . The method of claim 10 , wherein a frame comprises N time slots [FEATURE ID: 6]







Targeted Patent:

Patent: US10447450B2
Filed: 2005-09-28
Issued: 2019-10-15
Patent Holder: (Original Assignee) Neocific Inc     (Current Assignee) Neo Wireless LLC
Inventor(s): Xiaodong Li, Haiming Huang, Titus Lo, Ruifeng Wang

Title: Method and system for multi-carrier packet communication with reduced overhead

 
Cross Reference / Shared Meaning between the Lines		 Charted Against:

Patent: US20050163068A1
Filed: 2002-06-20
Issued: 2005-07-28
Patent Holder: (Original Assignee) Ahmed Saifuddin     
Inventor(s): Ahmed Saifuddin

Title: Adaptive gain adjustment control
[FEATURE ID: 1] operating methodassembly, method, embodiment, antenna, uplink, interface, arrangement[FEATURE ID: 1] apparatus
[FEATURE ID: 2] wireless network, base station, mobile station, methodsystem, transceiver, network, device, transmission, node, controller[FEATURE ID: 2] method, receiver, third power level, third power level relative, computer program, transmitter
[TRANSITIVE ID: 3] comprising, containing, havingcomprises, includes, involving, with, defining, representing, of[TRANSITIVE ID: 3] comprising, including
[TRANSITIVE ID: 4] employinggenerating, using, establishing, transmitting, receiving, deriving, selecting[TRANSITIVE ID: 4] adjusting, providing
[FEATURE ID: 5] frame structurepattern, periodicity, series, frequency, group, set, sequence[FEATURE ID: 5] reference power level, program
[FEATURE ID: 6] multiple frames, time intervals, frequency subcarriers, OFDM symbols, subcarriersbits, symbols, blocks, data, channels, cells, slots[FEATURE ID: 6] data groups, instructions executable
[FEATURE ID: 7] transmissionbroadcasting, messaging, signalling, transmitting[FEATURE ID: 7] communications
[FEATURE ID: 8] frame, OFDM symbol, signal, segment, subcarrierslot, subframe, symbol, sequence, burst, channel, block[FEATURE ID: 8] data frame
[FEATURE ID: 9] time interval, set, groupportion, segment, sequence, transmission, packet, signal, section[FEATURE ID: 9] second one, reference signal, parameter
[TRANSITIVE ID: 10] assigning, recoveringreceiving, processing, providing, identifying, determining, sending, communicating[TRANSITIVE ID: 10] transmitting, decoding, retransmitting
[TRANSITIVE ID: 11] transmittingforwarding, transfer, transmit, broadcasting, transmission[TRANSITIVE ID: 11] initial transmission
[FEATURE ID: 12] informationsignaling, metadata, communication, transmission, signals[FEATURE ID: 12] feedback
[TRANSITIVE ID: 13] receivingtransmitting, processing, receipt, reception[TRANSITIVE ID: 13] retransmission
[TRANSITIVE ID: 14] transmitted, received, conjunctiontransmission, first, communicated, sent, resulting, emitted, recovered[TRANSITIVE ID: 14] decoded, power ratio
[FEATURE ID: 15] claimitem, paragraph, clause, aspect, embodiment, figure, clair[FEATURE ID: 15] claim
[FEATURE ID: 16] mobile devicedevice, machine, processor, server[FEATURE ID: 16] Computer
1 . An operating method [FEATURE ID: 1]

for a wireless network [FEATURE ID: 2]

comprising [TRANSITIVE ID: 3]

at least a base station [FEATURE ID: 2]

and a mobile station [FEATURE ID: 2]

, the wireless network employing [TRANSITIVE ID: 4]

a frame structure [FEATURE ID: 5]

of multiple frames [FEATURE ID: 6]

for transmission [FEATURE ID: 7]

, each frame [FEATURE ID: 8]

comprising a plurality of time intervals [FEATURE ID: 6]

, each time interval [FEATURE ID: 9]

comprising a plurality of orthogonal frequency division multiplexing ( OFDM ) symbols , and each OFDM symbol [FEATURE ID: 8]

containing [TRANSITIVE ID: 3]

a plurality of frequency subcarriers [FEATURE ID: 6]

, the method [FEATURE ID: 2]

comprising : assigning [TRANSITIVE ID: 10]

an identifier to the mobile station ; transmitting [TRANSITIVE ID: 11]

a signal [FEATURE ID: 8]

containing information [FEATURE ID: 12]

from the base station to the mobile station over a segment [FEATURE ID: 8]

of time - frequency resource , the segment having [TRANSITIVE ID: 3]

a starting time - frequency coordinate and the segment comprising N time - frequency resource units within a time interval , each unit containing a set [FEATURE ID: 9]

of frequency subcarriers in a group [FEATURE ID: 9]

of OFDM symbols [FEATURE ID: 6]

, where N = 2 , 4 , or 8 ; and receiving [TRANSITIVE ID: 13]

by the mobile station the transmitted [TRANSITIVE ID: 14]

signal ; and recovering [TRANSITIVE ID: 10]

by the mobile station the information from the received [TRANSITIVE ID: 14]

signal based on the starting time - frequency coordinate and N in conjunction [FEATURE ID: 14]

with the identifier assigned to the mobile station . 2 . The method of claim [FEATURE ID: 15]

1 , wherein the starting time - frequency coordinate indicates a starting OFDM symbol of the segment of time - frequency resource . 3 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting subcarrier [FEATURE ID: 8]

of the segment of time - frequency resource . 4 . The method of claim 1 , wherein the starting time - frequency coordinate indicates a starting group of subcarriers [FEATURE ID: 6]

of the segment of time - frequency resource . 5 . The method of claim 1 , wherein modular coding is applied to the time - frequency resource units in the segment of time - frequency resource . 6 . The method of claim 5 , wherein a repetition coding is further applied to the time - frequence resource units . 7 . A mobile device [FEATURE ID: 16]

1 . A method [FEATURE ID: 2]

of communications [FEATURE ID: 7]

, comprising [TRANSITIVE ID: 3]

: transmitting [TRANSITIVE ID: 10]

a plurality of data groups [FEATURE ID: 6]

to a receiver [FEATURE ID: 2]

at a first power level ; decoding [TRANSITIVE ID: 10]

the plurality of data groups by the receiver ; and retransmitting [TRANSITIVE ID: 10]

one of the data groups at a second power level lower than the first power level if the one of the data groups is unsuccessfully decoded [TRANSITIVE ID: 14]

by the receiver . 2 . The method of claim [FEATURE ID: 15]

1 further comprising retransmitting another of the data groups at third power level different from the second power level if the another of the data groups is unsuccessfully decoded by the receiver . 3 . The method of claim 2 further including [TRANSITIVE ID: 3]

adjusting [TRANSITIVE ID: 4]

the third power level [FEATURE ID: 2]

as a function of the second power level . 4 . The method of claim 3 further including : lowering the third power level relative [FEATURE ID: 2]

to the second power level if the one of the data groups is successfully decoded ; and increasing the third power level relative to the second power level if the one of the data groups is unsuccessfully decoded . 5 . A method of communications , comprising : transmitting a plurality of data groups to a receiver at a first power level ; retransmitting a first one of the data groups to the receiver at a second power level lower than the first power level ; providing [TRANSITIVE ID: 4]

feedback [FEATURE ID: 12]

from the receiver relating to the retransmission [FEATURE ID: 13]

of the first one of the data groups ; and retransmitting a second one [FEATURE ID: 9]

of the data groups to the receiver at a third power level different from the second power level , the third power level being a function of the feedback . 6 . The method of claim 5 wherein the third power level is set relative to the second power level as a function of the feedback . 7 . The method of claim 5 wherein each of the data groups comprises a data frame [FEATURE ID: 8]

. 8 . The method of claim 5 wherein the third power level is less than the first power level . 9 . The method of claim 5 further comprising encoding each of the data groups , and wherein the feedback indicates whether the retransmission of the first one of the data groups was successfully decoded by the receiver . 10 . The method of claim 9 wherein the third power level is set higher than the second power level if the feedback indicates that the retransmission of the first one of the data groups was not successfully decoded by the receiver , and the third power level is set lower than the second power level if the feedback indicates that the retransmission of the first one of the data groups was successfully decoded by the receiver . 11 . The method of claim 10 wherein the third power level is set half - way between the first power level and the second power level if the feedback indicates that the retransmission of the first one of the data groups was not successfully decoded by the receiver , and the third power level is set half - way between a minimum power level and the second power level if the feedback indicates that the retransmission of the first one of the data groups was successfully decoded by the receiver , the minimum power level being less than the second power level . 12 . The method of claim 5 further comprising computing a reference power level [FEATURE ID: 5]

for transmitting a reference signal [FEATURE ID: 9]

with each of the data groups , computing a first power ratio as function of a parameter [FEATURE ID: 9]

, setting the first power level as a function of the reference power level and the first power ratio , deriving a second power ratio , setting of the second power level as a function of the reference power level and the second power ratio , deriving a third power ratio as a function of the feedback , and setting the third power level as a function of the reference power level and the power ratio [FEATURE ID: 14]

. 13 . The method of claim 12 wherein the third power ratio is set relative to the second power ratio as a function of the feedback . 14 . The method of claim 12 wherein the first power ratio is defined as the first power level divided by the reference power level , the second power ratio is defined as the second power level divided by the reference power level , and the third power ratio is defined as the third power level divided by the reference power level . 15 . The method of claim 14 wherein the third power ratio is less than the first power ratio . 16 . The method of claim 12 further comprising encoding each of the data groups , and wherein the feedback indicates whether the retransmission of the first one of the data groups was successfully decoded by the receiver . 17 . The method of claim 16 wherein the first power ratio is defined as the first power level divided by the reference power level , the second power ratio is defined as the second power level divided by the reference power level , and the third power ratio is defined as the third power level divided by the reference power level , the third power ratio being set higher than the second power ratio if the feedback indicates that the retransmission of the first one of the data groups was not successfully decoded by the receiver , and third power ratio being set lower than the second power ratio if the feedback indicates that the retransmission of the first one of the data groups was successfully decoded by the receiver . 18 . The method of claim 17 wherein the third power ratio is set half - way between the first power ratio and the second power ratio if the feedback indicates that the retransmission of the first one of the data groups was not successfully decoded by the receiver , and the third power ratio is set half - way between a minimum power ratio and the second power ratio if the feedback indicates that the retransmission of the first one of the data groups was successfully decoded by the receiver , the minimum power ratio being less than the second power ratio . 19 . Computer [FEATURE ID: 16]

- readable media embodying a program [FEATURE ID: 5]

of instructions executable [FEATURE ID: 6]

by a computer program [FEATURE ID: 2]

to perform a method of communications , the method comprising : transmitting a plurality of data groups to a receiver at a first power level ; decoding the plurality of data groups by the receiver ; and retransmitting one of the data groups at a second power level lower than the first power level if the one of the data groups is unsuccessfully decoded by the receiver . 20 . The computer - readable media of claim 19 wherein the method further comprising retransmitting another of the data groups at third power level different from the second power level if the another of the data groups is unsuccessfully decoded by the receiver . 21 . The computer - readable media of claim 20 wherein the method further including adjusting the third power level as a function of the second power level . 22 . The computer - readable media of claim 21 wherein the method further including : lowering the third power level relative to the second power level if the one of the data groups is successfully decoded ; and increasing the third power level relative to the second power level if the one of the data groups is unsuccessfully decoded . 23 . An apparatus [FEATURE ID: 1]

, comprising : a transmitter [FEATURE ID: 2]

; a buffer configured to provide a plurality of data groups to the transmitter for initial transmission [FEATURE ID: 11]