Targeted Patent: Patent: US10075941B2 Filed: 2004-01-29 Issued: 2018-09-11 Patent Holder: (Original Assignee) Neocific Inc (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Methods and apparatus for multi-carrier communication systems with adaptive transmission and feedback	Cross Reference / Shared Meaning between the Lines	Charted Against: Patent: US6681256B1 Filed: 1999-12-21 Issued: 2004-01-20 Patent Holder: (Original Assignee) Nokia Oyj (Current Assignee) Nokia Solutions and Networks Oy ; Nokia Inc Inventor(s): Roland Kuntze, Jari Jokela, Fujio Watanabe Title: Method for dynamically selecting allocation of random access channels in a communication system
[FEATURE ID: 1] link adaptation method	used, transmitted, provided, sent, implemented	[FEATURE ID: 1] defined
[FEATURE ID: 2] base station, mobile stations, communication system, method, mobile station, control channel, frequency subchannel, time slot, subchannel configuration, scheme, training pilot pattern, transmitter, receiver	channel, transceiver, transmission, network, station, radio, device	[FEATURE ID: 2] frame, communication system, mobile terminal, determiner, selector, coverage area
[TRANSITIVE ID: 3] serving	managing, controlling, providing, scheduling	[TRANSITIVE ID: 3] selecting
[TRANSITIVE ID: 4] utilizing, comprising	involving, providing, including, employing, being, with, featuring	[TRANSITIVE ID: 4] having
[FEATURE ID: 5] transmission structure, subsequent transmission, channel condition	preamble, channel, protocol, subframe, transmission, carrier, packet	[FEATURE ID: 5] nonrandom access portion
[FEATURE ID: 6] time slots, frequency subchannels	transmissions, signals, symbols, channels, bursts, communications, cells	[FEATURE ID: 6] length frames, random access channels, data, collisions
[FEATURE ID: 7] control message	channel, preamble, request, signal, communication, frame, report	[FEATURE ID: 7] communicate, random access channel, random access portion, registration message
[FEATURE ID: 8] transmission parameters	configuration, indications, the, control	[FEATURE ID: 8] selection
[TRANSITIVE ID: 9] allocated	selected, designated, configured, assigned, requested, adapted	[TRANSITIVE ID: 9] operable
[TRANSITIVE ID: 10] indicate	designate, establish, determine, identify, specify, represent	[TRANSITIVE ID: 10] define
[FEATURE ID: 11] antenna transmission scheme	array, antenna, object, uplink, implementation, arrangement, interface	[FEATURE ID: 11] access point, improvement
[TRANSITIVE ID: 12] corresponding	desired, respective, particular, different, predetermined, first	[TRANSITIVE ID: 12] selected
[FEATURE ID: 13] multiple	plural, the, two, various, several	[FEATURE ID: 13] many
[TRANSITIVE ID: 14] characterized	comprised, constituted, configured, defined	[TRANSITIVE ID: 14] formed
[FEATURE ID: 15] data packet, power control information	data, signaling, traffic, communication, channel, retransmission, throughput	[FEATURE ID: 15] communications, threshold
[FEATURE ID: 16] claim	item, figure, paragraph, statement, aspect, embodiment, of claim	[FEATURE ID: 16] claim
[FEATURE ID: 17] channel state information	instructions, information, measurements, parameters	[FEATURE ID: 17] indications
1 . A link adaptation method [FEATURE ID: 1] by a base station [FEATURE ID: 2] serving [TRANSITIVE ID: 3] a plurality of mobile stations [FEATURE ID: 2] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 2] , the communication system utilizing [TRANSITIVE ID: 4] a transmission structure [FEATURE ID: 5] with time slots [FEATURE ID: 6] in the time domain and frequency subchannels [FEATURE ID: 6] in the frequency domain , the method [FEATURE ID: 2] comprising [TRANSITIVE ID: 4] : transmitting a control message [FEATURE ID: 7] to a mobile station [FEATURE ID: 2] over a control channel [FEATURE ID: 2] , wherein : the control message contains transmission parameters [FEATURE ID: 8] allocated [TRANSITIVE ID: 9] to the mobile station for a subsequent transmission [FEATURE ID: 5] of data by the base station over a frequency subchannel [FEATURE ID: 2] to the mobile station in a time slot [FEATURE ID: 2] ; and the mobile station - specific transmission parameters indicate [TRANSITIVE ID: 10] an antenna transmission scheme [FEATURE ID: 11] and a corresponding [TRANSITIVE ID: 12] subchannel configuration [FEATURE ID: 2] , the antenna transmission scheme comprising a transmission diversity scheme or a multiple [FEATURE ID: 13] - input multiple - output ( MIMO ) scheme [FEATURE ID: 2] and the corresponding subchannel configuration characterized [TRANSITIVE ID: 14] by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet [FEATURE ID: 15] to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 2 . The method in claim [FEATURE ID: 16] 1 , wherein the mobile station - specific transmission parameters further indicate a training pilot pattern [FEATURE ID: 2] . 3 . The method in claim 1 , wherein the mobile station - specific transmission parameters further indicate power control information [FEATURE ID: 15] . 4 . The method in claim 1 , wherein the antenna transmission scheme is based on a channel condition [FEATURE ID: 5] . 5 . The method in claim 1 , wherein the corresponding subchannel configuration is selected based on a channel condition . 6 . A base station serving a plurality of mobile stations in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the communication system utilizing a transmission structure with time slots in the time domain and frequency subchannels in the frequency domain , the base station comprising a transmitter [FEATURE ID: 2] configured to : transmit a control message to a mobile station over a control channel , wherein : the control message contains transmission parameters allocated to the mobile station for a subsequent transmission of data by the base station over a frequency subchannel to the mobile station in a time slot ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding subchannel configuration , the antenna transmission scheme comprising a transmission diversity scheme or a multiple - input multiple - output ( MIMO ) scheme and the corresponding subchannel configuration characterized by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 7 . The base station in claim 6 , further comprising a receiver [FEATURE ID: 2] configured to receive channel state information [FEATURE ID: 17]		1 . In a multi-user , frame [FEATURE ID: 2] - formatted communication system [FEATURE ID: 2] in which fixed - length frames [FEATURE ID: 6] are defined [TRANSITIVE ID: 1] , each frame having [TRANSITIVE ID: 4] a random - access portion and a nonrandom access portion [FEATURE ID: 5] , the communication system having at least one mobile terminal [FEATURE ID: 2] that is capable of random access to a selected [TRANSITIVE ID: 12] number of random access channels [FEATURE ID: 6] , defined within the random - access portion of each frame , to communicate [TRANSITIVE ID: 7] data [FEATURE ID: 6] to an access point [FEATURE ID: 11] , an improvement [FEATURE ID: 11] of apparatus for selecting [TRANSITIVE ID: 3] the selected number of the random access channels defined within the random - access portion , thereby to define [TRANSITIVE ID: 10] , in part , how much of the frame is formed [TRANSITIVE ID: 14] of the random - access portion , said apparatus comprising : a determiner [FEATURE ID: 2] coupled to receive indications [FEATURE ID: 17] of a parameters indicative of anticipated communications [FEATURE ID: 15] between each of the at least one mobile terminal and the access point during the frame , said determiner for determining a number of random access channels needed to maintain a collision possibility of collisions [FEATURE ID: 6] between data communicated by the at least one mobile terminal upon a random access channel [FEATURE ID: 7] of the frame beneath a threshold [FEATURE ID: 15] ; and a selector [FEATURE ID: 2] in the access point operable responsive to determination made by said determiner , said selector for selecting how many random access channels are defined within the random - access portion of the frame , selection [FEATURE ID: 8] made by said selector being determinative of how much of the frame is comprised of the random access portion [FEATURE ID: 7] and determinative , at least in part , of how much of the frame is comprised of the nonrandom access portion . 2 . The apparatus of claim [FEATURE ID: 16] 1 wherein the indications of the parameter indicative of anticipated communication between each of the at least one mobile terminal and the access point which said determiner is coupled to receive comprise indications of how many [FEATURE ID: 13] of the at least one mobile terminal are associated with the access point . 3 . The apparatus of claim 2 wherein the access point defines a coverage area [FEATURE ID: 2] and wherein each of the at least one mobile terminal is associated with the access point when the mobile terminal is positioned within the coverage area of the access point . 4 . The apparatus of claim 3 wherein each of the at least one mobile terminal is operable [FEATURE ID: 9] to send a registration message [FEATURE ID: 7]

Targeted Patent: Patent: US10075941B2 Filed: 2004-01-29 Issued: 2018-09-11 Patent Holder: (Original Assignee) Neocific Inc (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Methods and apparatus for multi-carrier communication systems with adaptive transmission and feedback	Cross Reference / Shared Meaning between the Lines	Charted Against: Patent: EP0841763B1 Filed: 1996-10-25 Issued: 2003-12-10 Patent Holder: (Original Assignee) Nokia Oyj (Current Assignee) Nokia Oyj Inventor(s): Kari Rikkinen, Mikko J. Rinne, Kalle Ahmavaara, Mika Rinne Title: Method for radio resource control
[FEATURE ID: 1] link adaptation method	implementation, processing, operation, communication, transmission	[FEATURE ID: 1] use
[FEATURE ID: 2] base station, communication system, method, mobile station, scheme, transmitter, receiver	system, transceiver, station, device, terminal, network, radio	[FEATURE ID: 2] A method, radio system, base station subsystem
[TRANSITIVE ID: 3] serving, comprising, transmitting	providing, including, employing, using, scheduling, with, of	[TRANSITIVE ID: 3] controlling, comprising
[FEATURE ID: 4] mobile stations	cells, equipment, entities, devices, clients, receivers, vehicles	[FEATURE ID: 4] several mobile stations
[TRANSITIVE ID: 5] utilizing, indicate	comprising, exhibiting, have, are, define, contain, involving	[TRANSITIVE ID: 5] containing, having
[FEATURE ID: 6] transmission structure	bandwidth, carrier, slot, frame, channel, phase, modulation	[FEATURE ID: 6] frequency, code, radio connections
[FEATURE ID: 7] time slots, frequency domain, control channel, power control information, channel state information	data, symbols, time, information, channels, resources, traffic	[FEATURE ID: 7] physical radio resources, slots, different data transmission capacities, physical resources, respective physical radio resources
[FEATURE ID: 8] frequency subchannels	channels, symbols, frames, cells	[FEATURE ID: 8] dimensional slots
[FEATURE ID: 9] control message, data packet	data, communication, content, transmission, service, grant, response	[FEATURE ID: 9] duration
[FEATURE ID: 10] transmission parameters, subchannel configuration	transmission, characteristics, configuration, size, bandwidth, allocation, requirements	[FEATURE ID: 10] data transmission capacity, data transmission needs, volume
[TRANSITIVE ID: 11] allocated, distributed	configured, provided, divided, shared, transmitted, adapted, dedicated	[TRANSITIVE ID: 11] assignable
[FEATURE ID: 12] subsequent transmission	plurality, sequence, block, subset	[FEATURE ID: 12] multitude
[FEATURE ID: 13] frequency subchannel, training pilot pattern, channel condition	frequency, channel, bandwidth, location, carrier, rate, timing	[FEATURE ID: 13] time
[FEATURE ID: 14] time slot	cell, period, time, slots, single slot, symbol, cycle	[FEATURE ID: 14] slot, frame
[FEATURE ID: 15] multiple	two, various, several, different, the	[FEATURE ID: 15] said
[TRANSITIVE ID: 16] characterized	constituted, represented, described, delimited, provided, formed, defined	[TRANSITIVE ID: 16] determined
[FEATURE ID: 17] claim	item, step, figure, the, paragraph, of claim, clair	[FEATURE ID: 17] claim
1 . A link adaptation method [FEATURE ID: 1] by a base station [FEATURE ID: 2] serving [TRANSITIVE ID: 3] a plurality of mobile stations [FEATURE ID: 4] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 2] , the communication system utilizing [TRANSITIVE ID: 5] a transmission structure [FEATURE ID: 6] with time slots [FEATURE ID: 7] in the time domain and frequency subchannels [FEATURE ID: 8] in the frequency domain [FEATURE ID: 7] , the method [FEATURE ID: 2] comprising [TRANSITIVE ID: 3] : transmitting [TRANSITIVE ID: 3] a control message [FEATURE ID: 9] to a mobile station [FEATURE ID: 2] over a control channel [FEATURE ID: 7] , wherein : the control message contains transmission parameters [FEATURE ID: 10] allocated [TRANSITIVE ID: 11] to the mobile station for a subsequent transmission [FEATURE ID: 12] of data by the base station over a frequency subchannel [FEATURE ID: 13] to the mobile station in a time slot [FEATURE ID: 14] ; and the mobile station - specific transmission parameters indicate [TRANSITIVE ID: 5] an antenna transmission scheme and a corresponding subchannel configuration [FEATURE ID: 10] , the antenna transmission scheme comprising a transmission diversity scheme or a multiple [FEATURE ID: 15] - input multiple - output ( MIMO ) scheme [FEATURE ID: 2] and the corresponding subchannel configuration characterized [TRANSITIVE ID: 16] by distributed [TRANSITIVE ID: 11] subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet [FEATURE ID: 9] to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 2 . The method in claim [FEATURE ID: 17] 1 , wherein the mobile station - specific transmission parameters further indicate a training pilot pattern [FEATURE ID: 13] . 3 . The method in claim 1 , wherein the mobile station - specific transmission parameters further indicate power control information [FEATURE ID: 7] . 4 . The method in claim 1 , wherein the antenna transmission scheme is based on a channel condition [FEATURE ID: 13] . 5 . The method in claim 1 , wherein the corresponding subchannel configuration is selected based on a channel condition . 6 . A base station serving a plurality of mobile stations in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the communication system utilizing a transmission structure with time slots in the time domain and frequency subchannels in the frequency domain , the base station comprising a transmitter [FEATURE ID: 2] configured to : transmit a control message to a mobile station over a control channel , wherein : the control message contains transmission parameters allocated to the mobile station for a subsequent transmission of data by the base station over a frequency subchannel to the mobile station in a time slot ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding subchannel configuration , the antenna transmission scheme comprising a transmission diversity scheme or a multiple - input multiple - output ( MIMO ) scheme and the corresponding subchannel configuration characterized by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 7 . The base station in claim 6 , further comprising a receiver [FEATURE ID: 2] configured to receive channel state information [FEATURE ID: 7]		1 A method [FEATURE ID: 2] for controlling [TRANSITIVE ID: 3] physical radio resources [FEATURE ID: 7] in a radio system [FEATURE ID: 2] comprising [TRANSITIVE ID: 3] a base station subsystem [FEATURE ID: 2] and several mobile stations [FEATURE ID: 4] in radio connection thereto , characterised in that the physical radio resources are divided into chronologically consecutive frames ( 14 ) , said [TRANSITIVE ID: 15] frames containing [TRANSITIVE ID: 5] two - dimensional slots [FEATURE ID: 8] ( 16 , 17 , 18 ) having [TRANSITIVE ID: 5] varying data transmission capacities , in which case the data transmission capacity [FEATURE ID: 10] of each slot [FEATURE ID: 14] is determined [TRANSITIVE ID: 16] by the dimensions of the slot , and at least one frame [FEATURE ID: 14] contains slots [FEATURE ID: 7] of different data transmission capacities [FEATURE ID: 7] , each slot represents a given share of the physical resources [FEATURE ID: 7] contained in the frame , a multitude [FEATURE ID: 12] of slots in at least one frame are each dynamically assignable [FEATURE ID: 11] for the use [FEATURE ID: 1] of a given radio connection for the duration [FEATURE ID: 9] of the frame , the first dimension of the slots is time [FEATURE ID: 13] and the second dimension of the slots is one of the following : frequency [FEATURE ID: 6] , code [FEATURE ID: 6] ; and the base station subsystem makes a decision of allocating the slots for the radio connections [FEATURE ID: 6] on the basis of the data transmission needs [FEATURE ID: 10] of the radio connections , the changes in the data transmission needs of the radio connections occuring during the radio connections , and the size and state of occupancy of the slots . 2 A method according to claim [FEATURE ID: 17] 1 , characterised in that the slots contained in the frame belong , according to the volume [FEATURE ID: 10] of the respective physical radio resources [FEATURE ID: 7]

Targeted Patent: Patent: US10075941B2 Filed: 2004-01-29 Issued: 2018-09-11 Patent Holder: (Original Assignee) Neocific Inc (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Methods and apparatus for multi-carrier communication systems with adaptive transmission and feedback	Cross Reference / Shared Meaning between the Lines	Charted Against: Patent: US6657949B1 Filed: 1999-07-06 Issued: 2003-12-02 Patent Holder: (Original Assignee) Cisco Technology Inc (Current Assignee) Cisco Technology Inc Inventor(s): Vincent K. Jones, IV, James M. Gardner Title: Efficient request access for OFDM systems
[FEATURE ID: 1] link adaptation method	wireless method, technique, procedure, methodology	[FEATURE ID: 1] method
[FEATURE ID: 2] base station, communication system, transmission structure, method, mobile station, control channel, frequency subchannel, scheme, channel condition, transmitter, receiver	channel, transceiver, network, system, protocol, radio, terminal	[FEATURE ID: 2] digital communication system, medium, selected, data communication device, central access point
[TRANSITIVE ID: 3] serving, comprising, transmitting	providing, including, supporting, using, communicating, implementing, with	[TRANSITIVE ID: 3] employing, operating
[FEATURE ID: 4] mobile stations	subscribers, antennas, transmitters, users, neighbors, noise, upstream	[FEATURE ID: 4] other subscriber units, other data communication devices
[TRANSITIVE ID: 5] utilizing	performing, including, involving, defining, implementing, having, providing	[TRANSITIVE ID: 5] comprising, forming
[FEATURE ID: 6] time slots, time domain, frequency domain	samples, frames, signals, channels, bits, values, sequences	[FEATURE ID: 6] frequency domain symbols, data, time domain symbols, frequency domain positions, requests, access requests, differential decoding results, non-zero values, symbols, training symbols, symbol periods
[FEATURE ID: 7] frequency subchannels, transmission parameters, channel state information	channels, data, information, communications, resources, bandwidth, communication	[FEATURE ID: 7] access, values, multiple antennas
[FEATURE ID: 8] control message, data packet	data, broadcast, signal, communication, response, transmission, grant	[FEATURE ID: 8] OFDM, request, access request data
[TRANSITIVE ID: 9] allocated, multiple	dedicated, first, selected, requested, data, single, distributed	[TRANSITIVE ID: 9] shared
[FEATURE ID: 10] subsequent transmission	plurality, sequence, block, subset	[FEATURE ID: 10] second group
[FEATURE ID: 11] time slot, training pilot pattern	timing, time, frequency, rate, bandwidth, period, duration	[FEATURE ID: 11] number
[TRANSITIVE ID: 12] indicate	have, provide, specify, contain, enable, communicate, define	[TRANSITIVE ID: 12] request, comprise
[FEATURE ID: 13] claim	requirement, item, statement, figure, paragraph, embodiment, clair	[FEATURE ID: 13] claim
[FEATURE ID: 14] power control information	scrambling, information, differential, data, encryption, repetition, encoding	[FEATURE ID: 14] repetition coding, multiple subscriber units
1 . A link adaptation method [FEATURE ID: 1] by a base station [FEATURE ID: 2] serving [TRANSITIVE ID: 3] a plurality of mobile stations [FEATURE ID: 4] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 2] , the communication system utilizing [TRANSITIVE ID: 5] a transmission structure [FEATURE ID: 2] with time slots [FEATURE ID: 6] in the time domain [FEATURE ID: 6] and frequency subchannels [FEATURE ID: 7] in the frequency domain [FEATURE ID: 6] , the method [FEATURE ID: 2] comprising [TRANSITIVE ID: 3] : transmitting [TRANSITIVE ID: 3] a control message [FEATURE ID: 8] to a mobile station [FEATURE ID: 2] over a control channel [FEATURE ID: 2] , wherein : the control message contains transmission parameters [FEATURE ID: 7] allocated [TRANSITIVE ID: 9] to the mobile station for a subsequent transmission [FEATURE ID: 10] of data by the base station over a frequency subchannel [FEATURE ID: 2] to the mobile station in a time slot [FEATURE ID: 11] ; and the mobile station - specific transmission parameters indicate [TRANSITIVE ID: 12] an antenna transmission scheme and a corresponding subchannel configuration , the antenna transmission scheme comprising a transmission diversity scheme or a multiple [FEATURE ID: 9] - input multiple - output ( MIMO ) scheme [FEATURE ID: 2] and the corresponding subchannel configuration characterized by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet [FEATURE ID: 8] to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 2 . The method in claim [FEATURE ID: 13] 1 , wherein the mobile station - specific transmission parameters further indicate a training pilot pattern [FEATURE ID: 11] . 3 . The method in claim 1 , wherein the mobile station - specific transmission parameters further indicate power control information [FEATURE ID: 14] . 4 . The method in claim 1 , wherein the antenna transmission scheme is based on a channel condition [FEATURE ID: 2] . 5 . The method in claim 1 , wherein the corresponding subchannel configuration is selected based on a channel condition . 6 . A base station serving a plurality of mobile stations in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the communication system utilizing a transmission structure with time slots in the time domain and frequency subchannels in the frequency domain , the base station comprising a transmitter [FEATURE ID: 2] configured to : transmit a control message to a mobile station over a control channel , wherein : the control message contains transmission parameters allocated to the mobile station for a subsequent transmission of data by the base station over a frequency subchannel to the mobile station in a time slot ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding subchannel configuration , the antenna transmission scheme comprising a transmission diversity scheme or a multiple - input multiple - output ( MIMO ) scheme and the corresponding subchannel configuration characterized by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 7 . The base station in claim 6 , further comprising a receiver [FEATURE ID: 2] configured to receive channel state information [FEATURE ID: 7]		1 . In a digital communication system [FEATURE ID: 2] employing [TRANSITIVE ID: 3] a shared [TRANSITIVE ID: 9] medium [FEATURE ID: 2] , a method [FEATURE ID: 1] for operating [TRANSITIVE ID: 3] a selected [TRANSITIVE ID: 2] data communication device [FEATURE ID: 2] to request [TRANSITIVE ID: 12] access [FEATURE ID: 7] to said shared medium , said method comprising [TRANSITIVE ID: 5] : forming [TRANSITIVE ID: 5] frequency domain symbols [FEATURE ID: 6] of an OFDM burst , wherein a first group of frequency domain symbols comprise [TRANSITIVE ID: 12] differentially encoded data [FEATURE ID: 6] and a second group [FEATURE ID: 10] of frequency domain symbols comprise zero values [FEATURE ID: 7] to reserve said second group for data transmitted by other subscriber units [FEATURE ID: 4] ; transforming said frequency domain symbols of said OFDM [FEATURE ID: 8] burst into time domain symbols [FEATURE ID: 6] ; and transmitting said time domain symbols as a request [FEATURE ID: 8] for access to said shared medium . 2 . The method of claim [FEATURE ID: 13] 1 wherein values of said frequency domain symbols of said first group repeat within said first group to implement repetition coding [FEATURE ID: 14] . 3 . The method of claim 1 wherein forming comprises : providing a phase scrambling code that specifies phase shifts for frequency domain positions [FEATURE ID: 6] within said OFDM burst ; and applying said phase shifts of said phase scrambling code to frequency domain symbols of said first group according to positions of said frequency domain symbols within said OFDM burst . 4 . In a digital communication system employing a shared medium , a method for operating a central access point [FEATURE ID: 2] to receive requests [FEATURE ID: 6] for access to said shared medium , said method comprising : receiving an OFDM burst of time domain symbols ; converting said OFDM burst of time domain symbols into frequency domain symbols ; differentially decoding said frequency domain symbols ; obtaining access requests [FEATURE ID: 6] from multiple subscriber units [FEATURE ID: 14] ; and providing a phase descrambling code that specifies phase shifts for frequency domain positions within said OFDM burst ; and applying said phase shifts of said phase descrambling code to said frequency domain symbols according to positions of said frequency domain symbols . 5 . The method of claim 4 wherein receiving comprises receiving via multiple antennas [FEATURE ID: 7] , converting and differentially decoding are performed independently for each of said multiple antennas , and access requests obtaining comprises combining differential decoding results [FEATURE ID: 6] for said multiple antennas . 6 . In a digital communication system employing a shared medium , a method for operating a selected data communication device to request access to said shared medium , said method comprising : forming frequency domain symbols of an OFDM burst , wherein a first group of frequency domain symbols comprise non-zero values [FEATURE ID: 6] and a second group of frequency domain symbols comprise zero values to reserve said second group for data transmitted by other data communication devices [FEATURE ID: 4] , said first group of frequency domain symbols being contiguous to one another ; transforming said frequency domain symbols of said OFDM burst into time domain symbols ; and transmitting said time domain symbols as a request for access to said shared medium . 7 . The method of claim 6 wherein said first group of symbols [FEATURE ID: 6] comprises symbols carrying access request data [FEATURE ID: 8] and training symbols [FEATURE ID: 6] having predetermined values to facilitate channel estimation . 8 . The method of claim 7 wherein said symbols carrying access request data are repeated to implement repetition coding . 9 . The method of claim 7 wherein the number [FEATURE ID: 11] of said training symbols is less than v , a number of symbol periods [FEATURE ID: 6]

Targeted Patent: Patent: US10075941B2 Filed: 2004-01-29 Issued: 2018-09-11 Patent Holder: (Original Assignee) Neocific Inc (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Methods and apparatus for multi-carrier communication systems with adaptive transmission and feedback	Cross Reference / Shared Meaning between the Lines	Charted Against: Patent: US6654612B1 Filed: 2000-06-30 Issued: 2003-11-25 Patent Holder: (Original Assignee) Lucent Technologies Inc (Current Assignee) Nokia of America Corp ; WSOU Investments LLC Inventor(s): Dan Avidor, Sayandev Mukherjee, Jeong-Dong Ryoo Title: Distributed channel assignment method
[FEATURE ID: 1] link adaptation method, scheme	procedure, technique, operation, scheduling method, wireless method, supported, used	[FEATURE ID: 1] method, served
[FEATURE ID: 2] base station, communication system, control message, mobile station, control channel, frequency subchannel, channel condition, transmitter, receiver	transceiver, terminal, radio, station, network, transmission, sector	[FEATURE ID: 2] channel, wireless terminal, wireless communication system, cell, common receiver power level, base station, downlink channel, cluster
[FEATURE ID: 3] mobile stations	cells, station, devices, bs, sectors, nodes, antennas	[FEATURE ID: 3] base stations
[TRANSITIVE ID: 4] utilizing, comprising, transmitting, contains	providing, using, containing, generating, establishing, receiving, defining	[TRANSITIVE ID: 4] assigning, comprising, developing, selecting
[FEATURE ID: 5] transmission structure, frequency subchannels, transmission parameters, time slot, subchannel configuration, power control information	transmission, bandwidth, channel, communications, allocation, channelization, information	[FEATURE ID: 5] service, term basis
[FEATURE ID: 6] time slots, data packet	cells, data, resources, categories, signals, channels, services	[FEATURE ID: 6] regions, channel groups, downlink channels, downlink channel groups
[FEATURE ID: 7] method	process, following, technique, improvement, system, operations, step	[FEATURE ID: 7] steps, invention
[FEATURE ID: 8] multiple	first, single, two, one	[FEATURE ID: 8] long
[TRANSITIVE ID: 9] characterized, distributed	configured, allocated, classified, separated, formed, defined, partitioned	[TRANSITIVE ID: 9] divided
[FEATURE ID: 10] accordance	correspondence, parallel, conformity, conformance, order, communication, respect	[FEATURE ID: 10] response
[FEATURE ID: 11] claim	clair, item, figure, paragraph, point, of claim, step	[FEATURE ID: 11] claim
[FEATURE ID: 12] training pilot pattern, channel state information	traffic, information, retransmission, parameters, bandwidth, measurements, power	[FEATURE ID: 12] interregion interference estimates
1 . A link adaptation method [FEATURE ID: 1] by a base station [FEATURE ID: 2] serving a plurality of mobile stations [FEATURE ID: 3] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 2] , the communication system utilizing [TRANSITIVE ID: 4] a transmission structure [FEATURE ID: 5] with time slots [FEATURE ID: 6] in the time domain and frequency subchannels [FEATURE ID: 5] in the frequency domain , the method [FEATURE ID: 7] comprising [TRANSITIVE ID: 4] : transmitting [TRANSITIVE ID: 4] a control message [FEATURE ID: 2] to a mobile station [FEATURE ID: 2] over a control channel [FEATURE ID: 2] , wherein : the control message contains [TRANSITIVE ID: 4] transmission parameters [FEATURE ID: 5] allocated to the mobile station for a subsequent transmission of data by the base station over a frequency subchannel [FEATURE ID: 2] to the mobile station in a time slot [FEATURE ID: 5] ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding subchannel configuration [FEATURE ID: 5] , the antenna transmission scheme comprising a transmission diversity scheme or a multiple [FEATURE ID: 8] - input multiple - output ( MIMO ) scheme [FEATURE ID: 1] and the corresponding subchannel configuration characterized [TRANSITIVE ID: 9] by distributed [TRANSITIVE ID: 9] subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet [FEATURE ID: 6] to the mobile station over the frequency subchannel in accordance [FEATURE ID: 10] with the mobile station - specific transmission parameters . 2 . The method in claim [FEATURE ID: 11] 1 , wherein the mobile station - specific transmission parameters further indicate a training pilot pattern [FEATURE ID: 12] . 3 . The method in claim 1 , wherein the mobile station - specific transmission parameters further indicate power control information [FEATURE ID: 5] . 4 . The method in claim 1 , wherein the antenna transmission scheme is based on a channel condition [FEATURE ID: 2] . 5 . The method in claim 1 , wherein the corresponding subchannel configuration is selected based on a channel condition . 6 . A base station serving a plurality of mobile stations in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the communication system utilizing a transmission structure with time slots in the time domain and frequency subchannels in the frequency domain , the base station comprising a transmitter [FEATURE ID: 2] configured to : transmit a control message to a mobile station over a control channel , wherein : the control message contains transmission parameters allocated to the mobile station for a subsequent transmission of data by the base station over a frequency subchannel to the mobile station in a time slot ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding subchannel configuration , the antenna transmission scheme comprising a transmission diversity scheme or a multiple - input multiple - output ( MIMO ) scheme and the corresponding subchannel configuration characterized by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 7 . The base station in claim 6 , further comprising a receiver [FEATURE ID: 2] configured to receive channel state information [FEATURE ID: 12]		1 . A method [FEATURE ID: 1] for assigning [TRANSITIVE ID: 4] a channel [FEATURE ID: 2] in response [FEATURE ID: 10] to a request for service [FEATURE ID: 5] for a wireless terminal [FEATURE ID: 2] of a wireless communication system [FEATURE ID: 2] , the territory served [TRANSITIVE ID: 1] by said wireless communication system being divided [TRANSITIVE ID: 9] into a plurality of regions [FEATURE ID: 6] , said wireless terminal being located in one of said regions , the method comprising [TRANSITIVE ID: 4] the steps [FEATURE ID: 7] of : developing [TRANSITIVE ID: 4] a prioritized list of channel groups [FEATURE ID: 6] for at least said region in which said wireless terminal is located ; and selecting [TRANSITIVE ID: 4] a channel from the one of said channel groups that has the highest priority of those channel groups that have an available channel within said region , the method being CHARACTERIZED in that said prioritized list is developed based on interference measurements which are only made from time to time on a long [FEATURE ID: 8] - term basis [FEATURE ID: 5] . 2 . The invention [FEATURE ID: 7] as defined in claim [FEATURE ID: 11] 1 wherein said region is a cell [FEATURE ID: 2] of said wireless communication system . 3 . The invention as defined in claim 1 wherein said region is a sector of a cell of said wireless communication system . 4 . The invention as defined in claim 1 wherein , in said selecting step , said channel is selected randomly from the available channels of said group of channels having the highest priority and having an available channel . 5 . The invention as defined in claim 1 wherein said developing step further comprises the steps of : determining interregion interference estimates [FEATURE ID: 12] for said fixed wireless communication system . 6 . The invention as defined in claim 5 wherein said interregion interference is determined using a common receiver power level [FEATURE ID: 2] at a base station [FEATURE ID: 2] of said region . 7 . The invention as defined in claim 1 wherein said method is performed for a plurality of base station is and wherein , each of said base stations [FEATURE ID: 3] performs said selecting step randomly and independently . 8 . The invention as defined in claim 1 wherein for each of said regions there is a priority list for uplink channels and a priority list for downlink channels [FEATURE ID: 6] . 9 . The invention as defined in claim 1 wherein said developing and selecting steps are performed for uplink channels , the method further comprising the steps of : developing a prioritized list of downlink channel groups [FEATURE ID: 6] for at least said region in which said wireless terminal is located ; and selecting a downlink channel [FEATURE ID: 2] from the one of said downlink channel groups having the highest priority and having an available channel . 10 . The invention as defined in claim 1 wherein each of said regions belongs to a channel reuse cluster [FEATURE ID: 2]

Targeted Patent: Patent: US10075941B2 Filed: 2004-01-29 Issued: 2018-09-11 Patent Holder: (Original Assignee) Neocific Inc (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Methods and apparatus for multi-carrier communication systems with adaptive transmission and feedback	Cross Reference / Shared Meaning between the Lines	Charted Against: Patent: US6654429B1 Filed: 1998-12-31 Issued: 2003-11-25 Patent Holder: (Original Assignee) AT&T Corp (Current Assignee) AT&A CORP ; AT&T Corp Inventor(s): Ye Li Title: Pilot-aided channel estimation for OFDM in wireless systems
[FEATURE ID: 1] link adaptation method, allocated, transmitter	transmitted, provided, transmission, sent, receiver, wireless method, procedure	[FEATURE ID: 1] method, received
[FEATURE ID: 2] base station, communication system, frequency domain, control channel, subchannel configuration, receiver	transceiver, channel, transmission, radio, frequency, wireless, communication	[FEATURE ID: 2] wireless communication channel
[TRANSITIVE ID: 3] utilizing, comprising	providing, containing, including, being, having, implementing, performing	[TRANSITIVE ID: 3] comprising
[FEATURE ID: 4] transmission structure	transmission, slot, channel, carrier	[FEATURE ID: 4] block
[FEATURE ID: 5] time slots, transmission parameters	data, values, channels, samples, symbols, bits, components	[FEATURE ID: 5] OFDM blocks, signal tones, blocks, elements, reference pilot symbol values, estimates
[FEATURE ID: 6] frequency subchannels	symbols, data, information, taps, estimates, coefficients, values	[FEATURE ID: 6] elements representative, channel parameters
[FEATURE ID: 7] method	methods, process, following, step, procedure	[FEATURE ID: 7] steps
[TRANSITIVE ID: 8] transmitting	decoding, processing, sending, generating, broadcasting, providing	[TRANSITIVE ID: 8] receiving, transmission
[FEATURE ID: 9] control message, data packet	block, preamble, burst, signal, frame, channel, group	[FEATURE ID: 9] packet, OFDM block
[FEATURE ID: 10] subsequent transmission	plurality, packet, burst, multiple, collection, row, string	[FEATURE ID: 10] number N, number K
[FEATURE ID: 11] frequency subchannel	different channel, signal, corresponding channel, channel	[FEATURE ID: 11] N channel
[FEATURE ID: 12] time slot	time, period, duration, symbol	[FEATURE ID: 12] time index
[FEATURE ID: 13] multiple	single, corresponding, linear, parallel, inverse, different, local	[FEATURE ID: 13] first, second
[FEATURE ID: 14] scheme, claim	embodiment, requirement, aspect, figure, feature, item, statement	[FEATURE ID: 14] claim
[FEATURE ID: 15] training pilot pattern, power control information	bandwidth, rank, frequency, periodicity, channel, modulation, throughput	[FEATURE ID: 15] frequency index
[FEATURE ID: 16] channel condition	parameter, pattern, matrix, weight	[FEATURE ID: 16] second array
[FEATURE ID: 17] channel state information	data, information, results, parameters	[FEATURE ID: 17] estimates
1 . A link adaptation method [FEATURE ID: 1] by a base station [FEATURE ID: 2] serving a plurality of mobile stations in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 2] , the communication system utilizing [TRANSITIVE ID: 3] a transmission structure [FEATURE ID: 4] with time slots [FEATURE ID: 5] in the time domain and frequency subchannels [FEATURE ID: 6] in the frequency domain [FEATURE ID: 2] , the method [FEATURE ID: 7] comprising [TRANSITIVE ID: 3] : transmitting [TRANSITIVE ID: 8] a control message [FEATURE ID: 9] to a mobile station over a control channel [FEATURE ID: 2] , wherein : the control message contains transmission parameters [FEATURE ID: 5] allocated [TRANSITIVE ID: 1] to the mobile station for a subsequent transmission [FEATURE ID: 10] of data by the base station over a frequency subchannel [FEATURE ID: 11] to the mobile station in a time slot [FEATURE ID: 12] ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding subchannel configuration [FEATURE ID: 2] , the antenna transmission scheme comprising a transmission diversity scheme or a multiple [FEATURE ID: 13] - input multiple - output ( MIMO ) scheme [FEATURE ID: 14] and the corresponding subchannel configuration characterized by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet [FEATURE ID: 9] to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 2 . The method in claim [FEATURE ID: 14] 1 , wherein the mobile station - specific transmission parameters further indicate a training pilot pattern [FEATURE ID: 15] . 3 . The method in claim 1 , wherein the mobile station - specific transmission parameters further indicate power control information [FEATURE ID: 15] . 4 . The method in claim 1 , wherein the antenna transmission scheme is based on a channel condition [FEATURE ID: 16] . 5 . The method in claim 1 , wherein the corresponding subchannel configuration is selected based on a channel condition . 6 . A base station serving a plurality of mobile stations in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the communication system utilizing a transmission structure with time slots in the time domain and frequency subchannels in the frequency domain , the base station comprising a transmitter [FEATURE ID: 1] configured to : transmit a control message to a mobile station over a control channel , wherein : the control message contains transmission parameters allocated to the mobile station for a subsequent transmission of data by the base station over a frequency subchannel to the mobile station in a time slot ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding subchannel configuration , the antenna transmission scheme comprising a transmission diversity scheme or a multiple - input multiple - output ( MIMO ) scheme and the corresponding subchannel configuration characterized by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 7 . The base station in claim 6 , further comprising a receiver [FEATURE ID: 2] configured to receive channel state information [FEATURE ID: 17]		1 . A method [FEATURE ID: 1] for processing an OFDM signal received [TRANSITIVE ID: 1] over a wireless communication channel [FEATURE ID: 2] , said OFDM signal comprising [TRANSITIVE ID: 3] a packet [FEATURE ID: 9] of a number N [FEATURE ID: 10] of OFDM blocks [FEATURE ID: 5] , each OFDM block [FEATURE ID: 9] comprising a number K [FEATURE ID: 10] of signal tones [FEATURE ID: 5] , the method comprising the steps [FEATURE ID: 7] of : sequentially receiving [TRANSITIVE ID: 8] N channel [FEATURE ID: 11] - impaired OFDM blocks ; computing noisy channel estimates , based on said channel - impaired blocks [FEATURE ID: 5] ; arranging the noisy channel estimates [TRANSITIVE ID: 17] into a first array having a first axis representative of a frequency index [FEATURE ID: 15] of the noisy channel estimates and a second axis representative of a time index [FEATURE ID: 12] of the noisy channel estimates ; performing a first [FEATURE ID: 13] two - dimensional Fourier transform on said first array ; multiplying the Fourier transformed first array with a second array [FEATURE ID: 16] representing a two - dimensional filter to thereby form a third array ; and performing a second [FEATURE ID: 13] two - dimensional Fourier transform on said third array to thereby form a fourth array comprising elements representative [FEATURE ID: 6] of an estimate of channel parameters [FEATURE ID: 6] for said wireless communication channel . 2 . The method of claim [FEATURE ID: 14] 1 , wherein the two - dimensional filter is a diamond shaped filter . 3 . The method of claim 1 , wherein said step of computing the noisy channel estimates is performed by multiplying elements [FEATURE ID: 5] of each channel - impaired OFDM block with corresponding reference pilot symbol values [FEATURE ID: 5] known to have been inserted into that block [FEATURE ID: 4] upon transmission [FEATURE ID: 8] . 4 . The method of claim 1 , wherein said step of computing the noisy channel estimates is performed by multiplying elements of each channel - impaired OFDM block with corresponding estimates [FEATURE ID: 5]

Targeted Patent: Patent: US10075941B2 Filed: 2004-01-29 Issued: 2018-09-11 Patent Holder: (Original Assignee) Neocific Inc (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Methods and apparatus for multi-carrier communication systems with adaptive transmission and feedback	Cross Reference / Shared Meaning between the Lines	Charted Against: Patent: US20030214927A1 Filed: 2002-05-16 Issued: 2003-11-20 Patent Holder: (Original Assignee) NTT Docomo Inc (Current Assignee) NTT Docomo Inc Inventor(s): Hiroyuki Atarashi, Sadayuki Abeta, Noriyuki Maeda, Mamoru Sawahashi Title: Transmitter for multi-carrier transmission and multi-carrier transmitting method
[FEATURE ID: 1] link adaptation method, allocated, characterized	provided, configured, defined, supported, transmitted, selected, formed	[FEATURE ID: 1] allocated
[FEATURE ID: 2] base station, communication system, mobile station, transmitter, receiver	transceiver, device, system, communicator, terminal, radio, unit	[FEATURE ID: 2] transmitter, pilot symbol allocater, spreaders, controller, propagation path, receiver, radio channel
[TRANSITIVE ID: 3] serving, comprising	including, providing, of, to, using, containing, with	[TRANSITIVE ID: 3] having
[FEATURE ID: 4] OFDM	of, rf, ff, cf	[FEATURE ID: 4] OVSF
[TRANSITIVE ID: 5] utilizing	having, containing, involving, using, including	[TRANSITIVE ID: 5] comprising
[FEATURE ID: 6] transmission structure, frequency subchannel, time slot, channel condition	channel, bandwidth, subframe, carrier, pilot, signal, configuration	[FEATURE ID: 6] pilot symbol duration, code
[FEATURE ID: 7] time slots, data, subcarriers, data packet, power control information, channel state information	channels, carriers, periods, blocks, traffic, pilots, timing	[FEATURE ID: 7] sub-carriers, pilot symbol patterns, pilot symbol durations, portion, numbers, symbol durations, symbols, time base
[FEATURE ID: 8] frequency subchannels	segments, slots, blocks, symbols, frames	[FEATURE ID: 8] consecutive sub-carriers
[FEATURE ID: 9] method	the method, apparatus, process, methods, processing method, system	[FEATURE ID: 9] method
[FEATURE ID: 10] control channel, subsequent transmission	preamble, subframe, pilot, radio, transmitter, symbol, block	[FEATURE ID: 10] pilot symbol pattern, multi-carrier
[TRANSITIVE ID: 11] contains	specifies, has, identifies, defines, indicates	[TRANSITIVE ID: 11] changes
[FEATURE ID: 12] transmission parameters	configuration, properties, parameter, characteristics	[FEATURE ID: 12] condition
[TRANSITIVE ID: 13] indicate	support, provide, have, include	[TRANSITIVE ID: 13] transmit
[TRANSITIVE ID: 14] corresponding	predetermined, different, respective, frequency	[TRANSITIVE ID: 14] sub-carrier
[FEATURE ID: 15] subchannel configuration	configuration, arrangement, allocation, bandwidth	[FEATURE ID: 15] length
[FEATURE ID: 16] scheme, claim	figure, embodiment, requirement, aspect, feature, item, paragraph	[FEATURE ID: 16] claim
[FEATURE ID: 17] training pilot pattern	sequence, frequency, code, rate	[FEATURE ID: 17] Factor
1 . A link adaptation method [FEATURE ID: 1] by a base station [FEATURE ID: 2] serving [TRANSITIVE ID: 3] a plurality of mobile stations in an Orthogonal Frequency Division Multiplexing ( OFDM [FEATURE ID: 4] ) communication system [FEATURE ID: 2] , the communication system utilizing [TRANSITIVE ID: 5] a transmission structure [FEATURE ID: 6] with time slots [FEATURE ID: 7] in the time domain and frequency subchannels [FEATURE ID: 8] in the frequency domain , the method [FEATURE ID: 9] comprising [TRANSITIVE ID: 3] : transmitting a control message to a mobile station [FEATURE ID: 2] over a control channel [FEATURE ID: 10] , wherein : the control message contains [TRANSITIVE ID: 11] transmission parameters [FEATURE ID: 12] allocated [TRANSITIVE ID: 1] to the mobile station for a subsequent transmission [FEATURE ID: 10] of data [FEATURE ID: 7] by the base station over a frequency subchannel [FEATURE ID: 6] to the mobile station in a time slot [FEATURE ID: 6] ; and the mobile station - specific transmission parameters indicate [TRANSITIVE ID: 13] an antenna transmission scheme and a corresponding [TRANSITIVE ID: 14] subchannel configuration [FEATURE ID: 15] , the antenna transmission scheme comprising a transmission diversity scheme or a multiple - input multiple - output ( MIMO ) scheme [FEATURE ID: 16] and the corresponding subchannel configuration characterized [TRANSITIVE ID: 1] by distributed subcarriers [FEATURE ID: 7] or localized subcarriers in the frequency domain ; and transmitting a data packet [FEATURE ID: 7] to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 2 . The method in claim [FEATURE ID: 16] 1 , wherein the mobile station - specific transmission parameters further indicate a training pilot pattern [FEATURE ID: 17] . 3 . The method in claim 1 , wherein the mobile station - specific transmission parameters further indicate power control information [FEATURE ID: 7] . 4 . The method in claim 1 , wherein the antenna transmission scheme is based on a channel condition [FEATURE ID: 6] . 5 . The method in claim 1 , wherein the corresponding subchannel configuration is selected based on a channel condition . 6 . A base station serving a plurality of mobile stations in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the communication system utilizing a transmission structure with time slots in the time domain and frequency subchannels in the frequency domain , the base station comprising a transmitter [FEATURE ID: 2] configured to : transmit a control message to a mobile station over a control channel , wherein : the control message contains transmission parameters allocated to the mobile station for a subsequent transmission of data by the base station over a frequency subchannel to the mobile station in a time slot ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding subchannel configuration , the antenna transmission scheme comprising a transmission diversity scheme or a multiple - input multiple - output ( MIMO ) scheme and the corresponding subchannel configuration characterized by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 7 . The base station in claim 6 , further comprising a receiver [FEATURE ID: 2] configured to receive channel state information [FEATURE ID: 7]		1 . A transmitter [FEATURE ID: 2] for multi-carrier transmission configured to transmit [TRANSITIVE ID: 13] a plurality of sub-carriers [FEATURE ID: 7] having [TRANSITIVE ID: 3] at least one pilot symbol duration [FEATURE ID: 6] comprising [TRANSITIVE ID: 5] : a pilot symbol allocater [FEATURE ID: 2] configured to allocate a plurality of pilot symbol patterns [FEATURE ID: 7] which are orthogonal to each other , to the at least one pilot symbol durations [FEATURE ID: 7] in at least two sub-carriers . 2 . A transmitter for multi-carrier transmission according to claim [FEATURE ID: 16] 1 , wherein the pilot symbol allocater changes [TRANSITIVE ID: 11] the length [FEATURE ID: 15] of a pilot symbol pattern [FEATURE ID: 10] based on the number of the pilot symbol patterns which are allocated [TRANSITIVE ID: 1] . 3 . A transmitter for multi-carrier transmission according to claim 1 , wherein the pilot symbol pattern is configured with an Orthogonal Variable Spreading Factor [FEATURE ID: 17] ( OVSF [FEATURE ID: 4] ) code [FEATURE ID: 6] . 4 . A transmitter for multi-carrier transmission according to claim 1 , wherein the pilot symbol allocater allocates the pilot symbol patterns to any given portion [FEATURE ID: 7] in the at least one pilot symbol durations in at least two sub-carriers ; and the pilot symbol patterns which are allocated to the same portion are orthogonal to each other . 5 . A transmitter for multi-carrier transmission according to claim 1 , wherein the pilot symbol allocater allocates the pilot symbol patterns to the at least one pilot symbol durations in predetermined numbers [FEATURE ID: 7] of consecutive sub-carriers [FEATURE ID: 8] . 6 . A transmitter for multi-carrier transmission configured to transmit a plurality of sub-carriers having a plurality of symbol durations [FEATURE ID: 7] comprising : spreaders [FEATURE ID: 2] configured to spread and transmit symbols [FEATURE ID: 7] over the symbol durations in a plurality of sub-carriers , using sub-carrier [FEATURE ID: 14] spreading factor assigned in the direction of the sub-carriers and time - base spreading factor assigned in the direction of the time base [FEATURE ID: 7] ; and a controller [FEATURE ID: 2] configured to change the sub-carrier spreading factor or the time - base spreading factor , based on the condition [FEATURE ID: 12] of a propagation path [FEATURE ID: 2] between the transmitter and a receiver [FEATURE ID: 2] for multi-carrier transmission . 7 . A transmitter for multi-carrier transmission according to claim 6 , wherein the controller changes the sub-carrier spreading factor or the time - base spreading factor when a radio channel [FEATURE ID: 2] is set up between the transmitter and the receiver . 8 . A transmitter for multi-carrier transmission according to claim 6 , wherein the controller changes the sub-carrier spreading factor or the time - base spreading factor , following a change in the condition of the propagation path . 9 . A multi-carrier [FEATURE ID: 10] transmitting method [FEATURE ID: 9]

Targeted Patent: Patent: US10075941B2 Filed: 2004-01-29 Issued: 2018-09-11 Patent Holder: (Original Assignee) Neocific Inc (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Methods and apparatus for multi-carrier communication systems with adaptive transmission and feedback	Cross Reference / Shared Meaning between the Lines	Charted Against: Patent: EP1037303B1 Filed: 1999-03-12 Issued: 2003-11-12 Patent Holder: (Original Assignee) Motorola Inc (Current Assignee) Motorola Solutions Inc Inventor(s): Francesc Boixadera Espax, Yann Farmine, Nicholas Whinnett Title: Apparatus and method for generating transmitter antenna weights
[FEATURE ID: 1] base station, mobile station, transmitter	device, system, unit, means, terminal, circuit, transceiver	[FEATURE ID: 1] path, first communication device, first device, apparatus, second communications device, receiver, transmitter, channel estimator, timer
[TRANSITIVE ID: 2] serving, comprising	providing, with, includes, having, featuring, involving, being	[TRANSITIVE ID: 2] including
[TRANSITIVE ID: 3] utilizing	defining, containing, incorporating, being, using, including, having	[TRANSITIVE ID: 3] comprising
[FEATURE ID: 4] transmission structure, frequency subchannel, subchannel configuration, channel condition	channel, frequency, carrier, bandwidth, transmission, subband, resource	[FEATURE ID: 4] sub-carrier, reference signal
[FEATURE ID: 5] time slots, transmission parameters, power control information	channels, symbols, tones, information, packets, data, carriers	[FEATURE ID: 5] antenna weights, signals, sub-carriers, subbands
[FEATURE ID: 6] frequency subchannels	carrier, subband, frequency, bandwidth, signals	[FEATURE ID: 6] sub-band
[FEATURE ID: 7] method	process, apparatus, method further, system, step, said method, processing method	[FEATURE ID: 7] A method, method
[FEATURE ID: 8] control message, subsequent transmission	communication, notification, broadcast, preamble, report, repetition, reception	[FEATURE ID: 8] request, transmission
[FEATURE ID: 9] control channel	radio, first, communication, transceiver, transport, wireless	[FEATURE ID: 9] transmit
[TRANSITIVE ID: 10] contains	has, involves, incorporates, comprises, provides, carries, defines	[TRANSITIVE ID: 10] includes
[FEATURE ID: 11] time slot	duration, transmission, timing, moment, cycle	[FEATURE ID: 11] frequency
[FEATURE ID: 12] data packet	datum, pilot, waveform, sequence, preamble	[FEATURE ID: 12] signal
[FEATURE ID: 13] accordance	comparison, coincidence, correspondence, relation, combination	[FEATURE ID: 13] correlation
[FEATURE ID: 14] claim	item, clair, paragraph, cl claim, requirement, figure	[FEATURE ID: 14] claim
[FEATURE ID: 15] training pilot pattern	frequency, throughput, delay, bandwidth, channel, state, noise	[FEATURE ID: 15] frequency response, coherence time
[FEATURE ID: 16] receiver	circuitry, processor, monitor, device, unit	[FEATURE ID: 16] means
[FEATURE ID: 17] channel state information	feedback, information, data, parameters, measurements, signals, symbols	[FEATURE ID: 17] signal quality, reference signals
1 . A link adaptation method by a base station [FEATURE ID: 1] serving [TRANSITIVE ID: 2] a plurality of mobile stations in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the communication system utilizing [TRANSITIVE ID: 3] a transmission structure [FEATURE ID: 4] with time slots [FEATURE ID: 5] in the time domain and frequency subchannels [FEATURE ID: 6] in the frequency domain , the method [FEATURE ID: 7] comprising [TRANSITIVE ID: 2] : transmitting a control message [FEATURE ID: 8] to a mobile station [FEATURE ID: 1] over a control channel [FEATURE ID: 9] , wherein : the control message contains [TRANSITIVE ID: 10] transmission parameters [FEATURE ID: 5] allocated to the mobile station for a subsequent transmission [FEATURE ID: 8] of data by the base station over a frequency subchannel [FEATURE ID: 4] to the mobile station in a time slot [FEATURE ID: 11] ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding subchannel configuration [FEATURE ID: 4] , the antenna transmission scheme comprising a transmission diversity scheme or a multiple - input multiple - output ( MIMO ) scheme and the corresponding subchannel configuration characterized by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet [FEATURE ID: 12] to the mobile station over the frequency subchannel in accordance [FEATURE ID: 13] with the mobile station - specific transmission parameters . 2 . The method in claim [FEATURE ID: 14] 1 , wherein the mobile station - specific transmission parameters further indicate a training pilot pattern [FEATURE ID: 15] . 3 . The method in claim 1 , wherein the mobile station - specific transmission parameters further indicate power control information [FEATURE ID: 5] . 4 . The method in claim 1 , wherein the antenna transmission scheme is based on a channel condition [FEATURE ID: 4] . 5 . The method in claim 1 , wherein the corresponding subchannel configuration is selected based on a channel condition . 6 . A base station serving a plurality of mobile stations in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the communication system utilizing a transmission structure with time slots in the time domain and frequency subchannels in the frequency domain , the base station comprising a transmitter [FEATURE ID: 1] configured to : transmit a control message to a mobile station over a control channel , wherein : the control message contains transmission parameters allocated to the mobile station for a subsequent transmission of data by the base station over a frequency subchannel to the mobile station in a time slot ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding subchannel configuration , the antenna transmission scheme comprising a transmission diversity scheme or a multiple - input multiple - output ( MIMO ) scheme and the corresponding subchannel configuration characterized by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 7 . The base station in claim 6 , further comprising a receiver [FEATURE ID: 16] configured to receive channel state information [FEATURE ID: 17]		1 Apparatus for generating antenna weights [FEATURE ID: 5] for a transmit [TRANSITIVE ID: 9] path [FEATURE ID: 1] ( 3 ) of a first communication device [FEATURE ID: 1] ( 1 ) , said first device [FEATURE ID: 1] including [TRANSITIVE ID: 2] an antenna array ( 4 , 5,6 ) , in which the apparatus [FEATURE ID: 1] includes [TRANSITIVE ID: 10] , in a second communications device [FEATURE ID: 1] ( 2 ) a receiver [FEATURE ID: 1] ( 15 ) for receiving multi-carrier signals [FEATURE ID: 5] comprising [TRANSITIVE ID: 3] a plurality of sub-carriers [FEATURE ID: 5] transmitted from the antenna array ( 4 , 5 , 6 ) over a plurality of subbands [FEATURE ID: 5] , means [TRANSITIVE ID: 16] ( 18 ) for measuring a parameter of the received signals for each sub-carrier [FEATURE ID: 4] comprising each sub-band [FEATURE ID: 6] , means ( 19 ) for identifying at least one sub-band including a sub-carrier whose measured parameter meets predetermined criterion , a transmitter [FEATURE ID: 1] ( 14 ) for transmitting to the first communication device ( 1 ) a request [FEATURE ID: 8] for a reference signal [FEATURE ID: 4] in said identified sub-band , and calculating means ( 18 ) for calculating antenna weights for each sub-carrier included in said identified sub-band from an analysis of said reference signal . 2 Apparatus as claimed in either preceding claim [FEATURE ID: 14] in which the measured parameter is received signal quality [FEATURE ID: 17] . 3 Apparatus as claimed in any preceding claim in which the calculating means ( 18 ) is adapted to calculate the antenna weights by reference to a correlation [FEATURE ID: 13] of the reference signals [FEATURE ID: 17] with a stored signal [FEATURE ID: 12] . 4 Apparatus as claimed in any preceding claim in which the means for identifying sub-bands comprises a channel estimator [FEATURE ID: 1] ( 19 ) for estimating the frequency response [FEATURE ID: 15] of the transmit path ( 3 ) . 5 Apparatus as claimed in any preceding claim and further including a timer [FEATURE ID: 1] ( 20 ) for controlling the frequency [FEATURE ID: 11] of a transmission [FEATURE ID: 8] of the request for a reference signal . 6 Apparatus as claimed in any preceding claim and further including means ( 19 ) for estimating the coherence time [FEATURE ID: 15] of the transmit path ( 3 ) . 7 Apparatus as claimed in claim 1 and further including means ( 14 ) for transmitting the calculated antenna weights to the first communication device ( 1 ) . 8 Apparatus as claimed in Claims 6 and 7 and including a timer ( 20 ) for controlling frequency of the transmission of the calculated antenna weights . 9 A method [FEATURE ID: 7] for generating antenna weights for a transmit path of a first communication device ( 1 ) , said first communication device including an antenna array ( 4 , 5,6 ) in which method [FEATURE ID: 7]

Targeted Patent: Patent: US10075941B2 Filed: 2004-01-29 Issued: 2018-09-11 Patent Holder: (Original Assignee) Neocific Inc (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Methods and apparatus for multi-carrier communication systems with adaptive transmission and feedback	Cross Reference / Shared Meaning between the Lines	Charted Against: Patent: US6647078B1 Filed: 2000-06-30 Issued: 2003-11-11 Patent Holder: (Original Assignee) Motorola Inc (Current Assignee) Motorola Solutions Inc Inventor(s): Timothy A. Thomas, Frederick W. Vook Title: Method and device for multi-user frequency-domain channel estimation based on gradient optimization techniques
[FEATURE ID: 1] link adaptation method, method, scheme, characterized	procedure, technique, defined, provided, system, wireless method, methodology	[FEATURE ID: 1] method, computed
[FEATURE ID: 2] base station, communication system, mobile station, control channel, transmitter, receiver	transceiver, station, terminal, processor, radio, demodulator, scheduler	[FEATURE ID: 2] communication system, receiver, previous time, device, channel estimation device
[TRANSITIVE ID: 3] serving	providing, using, managing, of, supporting, with, implementing	[TRANSITIVE ID: 3] operating, including, comprising
[FEATURE ID: 4] mobile stations, frequency subchannels, transmission parameters, channel state information	frames, information, resources, channels, antennas, data, receivers	[FEATURE ID: 4] pilot symbols, symbol estimates
[TRANSITIVE ID: 5] utilizing	performing, employing, taking, defining, receiving, comprising, implementing	[TRANSITIVE ID: 5] determining, using
[FEATURE ID: 6] transmission structure, subsequent transmission, frequency subchannel, time slot	subframe, transmission, burst, carrier, transmitter, link, channel	[FEATURE ID: 6] pilot block
[FEATURE ID: 7] time slots	pilots, data, information, estimates, signals, carriers, bursts	[FEATURE ID: 7] data symbols, channel estimation, pilot data block
[TRANSITIVE ID: 8] comprising, contains	includes, involves, encompasses, has, represents, consists, including	[TRANSITIVE ID: 8] comprises
[TRANSITIVE ID: 9] transmitting	processing, sending, generating, communicating, selecting, storing, identifying	[TRANSITIVE ID: 9] providing, receiving
[FEATURE ID: 10] control message, data, power control information	transmission, information, traffic, user data, communication, signal, traffic data	[FEATURE ID: 10] pilot data
[TRANSITIVE ID: 11] allocated, corresponding	selected, associated, respective, first, communicated, configured, transmitted	[TRANSITIVE ID: 11] received
[FEATURE ID: 12] data packet	pilot, channel, feedback, symbol, retransmission	[FEATURE ID: 12] second channel estimate
[FEATURE ID: 13] claim	clam, item, figure, statement, paragraph, embodiment, of claim	[FEATURE ID: 13] claim
[FEATURE ID: 14] training pilot pattern	sequence, rank, pilot, delay	[FEATURE ID: 14] step size
[FEATURE ID: 15] channel condition	channel, matrix, parameter, signal, pilot, vector, first	[FEATURE ID: 15] first channel estimate, second direction vector, channel estimate
1 . A link adaptation method [FEATURE ID: 1] by a base station [FEATURE ID: 2] serving [TRANSITIVE ID: 3] a plurality of mobile stations [FEATURE ID: 4] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 2] , the communication system utilizing [TRANSITIVE ID: 5] a transmission structure [FEATURE ID: 6] with time slots [FEATURE ID: 7] in the time domain and frequency subchannels [FEATURE ID: 4] in the frequency domain , the method [FEATURE ID: 1] comprising [TRANSITIVE ID: 8] : transmitting [TRANSITIVE ID: 9] a control message [FEATURE ID: 10] to a mobile station [FEATURE ID: 2] over a control channel [FEATURE ID: 2] , wherein : the control message contains [TRANSITIVE ID: 8] transmission parameters [FEATURE ID: 4] allocated [TRANSITIVE ID: 11] to the mobile station for a subsequent transmission [FEATURE ID: 6] of data [FEATURE ID: 10] by the base station over a frequency subchannel [FEATURE ID: 6] to the mobile station in a time slot [FEATURE ID: 6] ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding [TRANSITIVE ID: 11] subchannel configuration , the antenna transmission scheme comprising a transmission diversity scheme or a multiple - input multiple - output ( MIMO ) scheme [FEATURE ID: 1] and the corresponding subchannel configuration characterized [TRANSITIVE ID: 1] by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet [FEATURE ID: 12] to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 2 . The method in claim [FEATURE ID: 13] 1 , wherein the mobile station - specific transmission parameters further indicate a training pilot pattern [FEATURE ID: 14] . 3 . The method in claim 1 , wherein the mobile station - specific transmission parameters further indicate power control information [FEATURE ID: 10] . 4 . The method in claim 1 , wherein the antenna transmission scheme is based on a channel condition [FEATURE ID: 15] . 5 . The method in claim 1 , wherein the corresponding subchannel configuration is selected based on a channel condition . 6 . A base station serving a plurality of mobile stations in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the communication system utilizing a transmission structure with time slots in the time domain and frequency subchannels in the frequency domain , the base station comprising a transmitter [FEATURE ID: 2] configured to : transmit a control message to a mobile station over a control channel , wherein : the control message contains transmission parameters allocated to the mobile station for a subsequent transmission of data by the base station over a frequency subchannel to the mobile station in a time slot ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding subchannel configuration , the antenna transmission scheme comprising a transmission diversity scheme or a multiple - input multiple - output ( MIMO ) scheme and the corresponding subchannel configuration characterized by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 7 . The base station in claim 6 , further comprising a receiver [FEATURE ID: 2] configured to receive channel state information [FEATURE ID: 4]		1 . A method [FEATURE ID: 1] of operating [TRANSITIVE ID: 3] a communication system [FEATURE ID: 2] including [TRANSITIVE ID: 3] at least one receiver [FEATURE ID: 2] comprising [TRANSITIVE ID: 3] : providing [TRANSITIVE ID: 9] a plurality of pilot symbols [FEATURE ID: 4] ; receiving [TRANSITIVE ID: 9] pilot data [FEATURE ID: 10] ; determining [TRANSITIVE ID: 5] an initial time vector as a function of the received [TRANSITIVE ID: 11] pilot data and pilot symbols ; determining an initial direction vector as a function of the initial time vector and the pilot symbols ; and determining a first channel estimate [FEATURE ID: 15] as a function of the initial direction vector , the initial time vector , and an initial step size . 2 . The method of claim [FEATURE ID: 13] 1 wherein the initial time vector is computed [TRANSITIVE ID: 1] using [TRANSITIVE ID: 5] Discrete Fourier Transform ( DFT ) processing . 3 . The method of claim 2 wherein the Discrete Fourier Transform ( DFT ) comprises [TRANSITIVE ID: 8] a Fast Fourier Transform ( FFT ) . 4 . The method of claim 1 further comprising determining a second channel estimate [FEATURE ID: 12] as a function of a second direction vector [FEATURE ID: 15] , the first channel estimate and a second step size . 5 . The method of claim 1 further comprising determining an initial gradient vector from the initial direction vector , wherein the first channel estimate is determined as a function of the initial gradient vector . 6 . A method of operating a communication system including at least one receiver comprising : providing a plurality of symbol estimates [FEATURE ID: 4] ; receiving a plurality of data symbols [FEATURE ID: 7] ; determining an initial time vector as a function of the received data symbols and symbol estimates ; determining an initial direction vector as a function of the initial time vector , the symbol estimates , and an initial channel estimate ; and determining a first channel estimate as a function of the initial direction vector , the initial channel estimate and an initial step size . 7 . The method of claim 6 wherein the initial time vector is computed using Discrete Fourier Transform ( DFT ) processing . 8 . The method of claim 6 wherein the Discrete Fourier Transform ( DFT ) comprises a Fast Fourier Transform ( FFT ) . 9 . The method of claim 6 further comprising determining a second channel estimate as a function of a second direction vector , the first channel estimate and a second step size . 10 . The method of claim 6 wherein the initial channel estimate is equal to a channel estimate [FEATURE ID: 15] from a previous time [FEATURE ID: 2] . 11 . The method of determining channel estimation [FEATURE ID: 7] for a pilot block [FEATURE ID: 6] between a transmitting device [FEATURE ID: 2] and a receiving device comprising : a ) initializing a channel estimation device [FEATURE ID: 2] by storing pilot symbols ; b ) receiving pilot data ; c ) computing an initial time vector as a function of a received pilot data block [FEATURE ID: 7] and pilot symbols ; d ) initializing an iteration number t to zero ; e ) initializing a channel estimate to equal the initial time vector ; f ) computing a direction vector based on the initial time vector , pilot symbols , and channel estimate at iteration t ; g ) computing a channel estimate at iteration t +1 based on the direction vector at iteration t , a channel estimate at iteration t , and a step size [FEATURE ID: 14]

Targeted Patent: Patent: US10075941B2 Filed: 2004-01-29 Issued: 2018-09-11 Patent Holder: (Original Assignee) Neocific Inc (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Methods and apparatus for multi-carrier communication systems with adaptive transmission and feedback	Cross Reference / Shared Meaning between the Lines	Charted Against: Patent: US6643281B1 Filed: 1998-03-05 Issued: 2003-11-04 Patent Holder: (Original Assignee) AT&T Wireless Services Inc (Current Assignee) Clear Wireless LLC ; Clearwire IP Holdings LLC ; Clearwire Legacy LLC ; Clearwire Communications LLC Inventor(s): David James Ryan Title: Synchronization preamble method for OFDM waveforms in a communications system
[FEATURE ID: 1] base station, mobile stations, mobile station, control channel, receiver	transceiver, station, mobile, terminal, transmitter, network, radio	[FEATURE ID: 1] base station, remote station, remote station clock, wireless discrete multitone spread spectrum communications system
[TRANSITIVE ID: 2] utilizing, comprising	having, containing, comprises, employing, involving, by, implementing	[TRANSITIVE ID: 2] comprising, including
[FEATURE ID: 3] transmission structure, channel condition	carrier, channel, preamble, protocol, configuration, bandwidth, subframe	[FEATURE ID: 3] spread signal
[FEATURE ID: 4] time slots	channels, signals, resources, transmissions, symbols, intervals, times	[FEATURE ID: 4] tone frequencies, outgoing frequencies, incoming frequencies
[FEATURE ID: 5] frequency subchannels	components, antennas, symbols, beams, signals, resources	[FEATURE ID: 5] weights
[TRANSITIVE ID: 6] transmitting	transmission, transferring, distributing, emitting, delivering, signaling, generating	[TRANSITIVE ID: 6] transmitting
[FEATURE ID: 7] control message, frequency subchannel	signal, transmission, frame, preamble, channel, broadcast, communication	[FEATURE ID: 7] synchronization burst, error signal spread
[TRANSITIVE ID: 8] allocated	related, according, assigned, corresponding, specific, dedicated	[TRANSITIVE ID: 8] pattern unique
[FEATURE ID: 9] subsequent transmission	preamble, period, subframe, sequence, burst	[FEATURE ID: 9] time window
[FEATURE ID: 10] time slot	time, burst, period, window, moment, duration	[FEATURE ID: 10] base station reference instant
[FEATURE ID: 11] antenna transmission scheme	interface, antenna, array, aerial, uplink	[FEATURE ID: 11] antenna element
[TRANSITIVE ID: 12] characterized	defined, produced, provided, represented, identified, determined, specified	[TRANSITIVE ID: 12] established
[FEATURE ID: 13] data packet, channel state information	data, communication, retransmission, content, feedback, traffic, symbols	[FEATURE ID: 13] synchronization signal
[FEATURE ID: 14] accordance	comparison, parallel, conformity, conformance, order, correspondence, respect	[FEATURE ID: 14] response
[FEATURE ID: 15] claim	item, clam, statement, aspect, figure, paragraph, embodiment	[FEATURE ID: 15] claim
[FEATURE ID: 16] training pilot pattern	delay, timing, frequency, waveform, code, rate	[FEATURE ID: 16] phase
[FEATURE ID: 17] power control information	traffic, information, coverage, throughput, frequency, power	[FEATURE ID: 17] bandwidth
[FEATURE ID: 18] transmitter	sender, broadcaster, transmitting, emitter, transmission, receiver	[FEATURE ID: 18] source
1 . A link adaptation method by a base station [FEATURE ID: 1] serving a plurality of mobile stations [FEATURE ID: 1] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the communication system utilizing [TRANSITIVE ID: 2] a transmission structure [FEATURE ID: 3] with time slots [FEATURE ID: 4] in the time domain and frequency subchannels [FEATURE ID: 5] in the frequency domain , the method comprising [TRANSITIVE ID: 2] : transmitting [TRANSITIVE ID: 6] a control message [FEATURE ID: 7] to a mobile station [FEATURE ID: 1] over a control channel [FEATURE ID: 1] , wherein : the control message contains transmission parameters allocated [TRANSITIVE ID: 8] to the mobile station for a subsequent transmission [FEATURE ID: 9] of data by the base station over a frequency subchannel [FEATURE ID: 7] to the mobile station in a time slot [FEATURE ID: 10] ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme [FEATURE ID: 11] and a corresponding subchannel configuration , the antenna transmission scheme comprising a transmission diversity scheme or a multiple - input multiple - output ( MIMO ) scheme and the corresponding subchannel configuration characterized [TRANSITIVE ID: 12] by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet [FEATURE ID: 13] to the mobile station over the frequency subchannel in accordance [FEATURE ID: 14] with the mobile station - specific transmission parameters . 2 . The method in claim [FEATURE ID: 15] 1 , wherein the mobile station - specific transmission parameters further indicate a training pilot pattern [FEATURE ID: 16] . 3 . The method in claim 1 , wherein the mobile station - specific transmission parameters further indicate power control information [FEATURE ID: 17] . 4 . The method in claim 1 , wherein the antenna transmission scheme is based on a channel condition [FEATURE ID: 3] . 5 . The method in claim 1 , wherein the corresponding subchannel configuration is selected based on a channel condition . 6 . A base station serving a plurality of mobile stations in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the communication system utilizing a transmission structure with time slots in the time domain and frequency subchannels in the frequency domain , the base station comprising a transmitter [FEATURE ID: 18] configured to : transmit a control message to a mobile station over a control channel , wherein : the control message contains transmission parameters allocated to the mobile station for a subsequent transmission of data by the base station over a frequency subchannel to the mobile station in a time slot ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding subchannel configuration , the antenna transmission scheme comprising a transmission diversity scheme or a multiple - input multiple - output ( MIMO ) scheme and the corresponding subchannel configuration characterized by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 7 . The base station in claim 6 , further comprising a receiver [FEATURE ID: 1] configured to receive channel state information [FEATURE ID: 13]		1 . A highly bandwidth [FEATURE ID: 17] - efficient communications method , comprising [TRANSITIVE ID: 2] : forming a synchronization burst [FEATURE ID: 7] at an antenna element [FEATURE ID: 11] of a base station [FEATURE ID: 1] , including [TRANSITIVE ID: 2] a plurality of tone frequencies [FEATURE ID: 4] arranged in a distinctive orthogonal frequency division multiplexed pattern unique [FEATURE ID: 8] to the base station ; transmitting [TRANSITIVE ID: 6] the synchronization burst from the antenna element at a base station reference instant [FEATURE ID: 10] of time ; receiving the synchronization burst at a remote station [FEATURE ID: 1] during a remote station receive time window [FEATURE ID: 9] which begins at a remote station reference instant of time established [TRANSITIVE ID: 12] by a remote station clock [FEATURE ID: 1] ; recognizing the pattern of the plurality of tone frequencies as having the base station as the source [FEATURE ID: 18] of the synchronization burst ; transmitting an error signal back to the base station at an instant referenced with respect to the remote station reference instant of time , in response [FEATURE ID: 14] to the recognizing ; deriving from the error signal a correction value related to a relative time error between the base station reference instant of time and the remote station reference instant of time ; and transmitting the correction value to the remote station to correct the remote station clock . 2 . The highly bandwidth - efficient communications method of claim [FEATURE ID: 15] 1 , wherein deriving further comprises : deriving from the error signal a second value related to a relative phase error between the base station and the remote station ; and transmitting the second value to the remote station to correct the remote station . 3 . The highly bandwidth - efficient communications method of claim 1 , wherein forming the synchronization burst comprises : selecting the distinctive orthogonal frequency division multiplexed pattern unique to the base station ; computing spreading weights [FEATURE ID: 5] at the base station to spread an outgoing synchronization signal over a plurality of outgoing frequencies [FEATURE ID: 4] , using the pattern ; and spreading the synchronization signal [FEATURE ID: 13] over the plurality of outgoing frequencies using the computed spreading weights , thereby forming the synchronization burst . 4 . The highly bandwidth - efficient communications method of claim 1 , wherein deriving the error signal at the base station comprises : receiving at the base station a spread signal [FEATURE ID: 3] comprising an incoming signal that includes the error signal spread [FEATURE ID: 7] over a plurality of incoming frequencies [FEATURE ID: 4] ; adaptively despreading the spread signal received at the base station by using despreading weights , recovering the error signal ; deriving from the error signal the relative time error ; comparing the relative time error with a desired relative time difference value ; calculating the correction value in response to the comparing , to minimize a difference between the relative time error and the desired relative time difference value . 5 . The highly bandwidth - efficient communications method of claim 1 , wherein the base station is part of a wireless discrete multitone spread spectrum communications system [FEATURE ID: 1] . 6 . The highly bandwidth - efficient communications method of claim 1 , wherein a time of arrival of the error signal at the base station is used to derive the correction value . 7 . The highly bandwidth - efficient communications method of claim 1 , wherein a phase [FEATURE ID: 16]

Targeted Patent: Patent: US10075941B2 Filed: 2004-01-29 Issued: 2018-09-11 Patent Holder: (Original Assignee) Neocific Inc (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Methods and apparatus for multi-carrier communication systems with adaptive transmission and feedback	Cross Reference / Shared Meaning between the Lines	Charted Against: Patent: US6615024B1 Filed: 1998-05-01 Issued: 2003-09-02 Patent Holder: (Original Assignee) Arraycomm LLC (Current Assignee) Intel Corp Inventor(s): Tibor Boros, Craig H. Barratt, Christopher R. Uhlik, Mitchell D. Trott Title: Method and apparatus for determining signatures for calibrating a communication station having an antenna array
[FEATURE ID: 1] link adaptation method, method	procedure, methodology, communication, technique, step, scheme, protocol	[FEATURE ID: 1] method
[FEATURE ID: 2] base station, transmitter, receiver	station, device, transceiver, unit, terminal, channel, processor	[FEATURE ID: 2] wireless communication system, main transceiver, antenna array
[TRANSITIVE ID: 3] serving, utilizing	providing, including, of, having, implementing, containing, performing	[TRANSITIVE ID: 3] comprising
[FEATURE ID: 4] mobile stations	sites, units, devices, transmitters, sectors, nodes, cells	[FEATURE ID: 4] distinct antenna elements
[FEATURE ID: 5] transmission structure	channel, transmission, transmitter, format, schedule, waveform	[FEATURE ID: 5] downlink weight vector
[FEATURE ID: 6] time slots, frequency subchannels, transmission parameters, subcarriers, data packet, power control information, channel state information	channels, data, transmissions, symbols, pilots, tones, beams	[FEATURE ID: 6] downlink calibration waveforms, antenna elements, constant modulus calibration signals, calibration signals, signals, uplink calibration waveforms, antenna signals, uplink calibration signals, idle waveforms
[TRANSITIVE ID: 7] comprising, contains	comprises, includes, represents, containing, provides, carries, defines	[TRANSITIVE ID: 7] comprise
[TRANSITIVE ID: 8] transmitting	conveying, providing, distributing, emitting, delivering, repeating, signaling	[TRANSITIVE ID: 8] transmitting
[FEATURE ID: 9] control message	preamble, signal, transmission, channel, data	[FEATURE ID: 9] determined uplink weights
[FEATURE ID: 10] mobile station	user, radiotelephone, transmitter, receiver, transceiver	[FEATURE ID: 10] remote transceiver
[FEATURE ID: 11] control channel	first, broadcast, transceiver, transport, transmission, wireless, radio	[FEATURE ID: 11] transmit
[TRANSITIVE ID: 12] allocated	distributed, sent, selected, communicated, provided	[TRANSITIVE ID: 12] transmitted
[FEATURE ID: 13] subsequent transmission, time slot	packet, period, sequence, block, burst, subset, group	[FEATURE ID: 13] set, number
[FEATURE ID: 14] antenna transmission scheme	antenna, array, uplink, algorithm, assignment, encoding	[FEATURE ID: 14] air interface standard
[FEATURE ID: 15] multiple	plural, two, four, several, different	[FEATURE ID: 15] modulated
[FEATURE ID: 16] scheme, claim	embodiment, requirement, figure, aspect, specification, clair, step	[FEATURE ID: 16] claim
[FEATURE ID: 17] accordance	comparison, parallel, respect, correspondence, connection, association	[FEATURE ID: 17] relation
[FEATURE ID: 18] training pilot pattern	modulation, timing, channel, carrier, delay	[FEATURE ID: 18] frequency
[FEATURE ID: 19] channel condition	parameter, location, beam, configuration, polarization, weight, response	[FEATURE ID: 19] reference antenna element, calibration function
1 . A link adaptation method [FEATURE ID: 1] by a base station [FEATURE ID: 2] serving [TRANSITIVE ID: 3] a plurality of mobile stations [FEATURE ID: 4] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the communication system utilizing [TRANSITIVE ID: 3] a transmission structure [FEATURE ID: 5] with time slots [FEATURE ID: 6] in the time domain and frequency subchannels [FEATURE ID: 6] in the frequency domain , the method [FEATURE ID: 1] comprising [TRANSITIVE ID: 7] : transmitting [TRANSITIVE ID: 8] a control message [FEATURE ID: 9] to a mobile station [FEATURE ID: 10] over a control channel [FEATURE ID: 11] , wherein : the control message contains [TRANSITIVE ID: 7] transmission parameters [FEATURE ID: 6] allocated [TRANSITIVE ID: 12] to the mobile station for a subsequent transmission [FEATURE ID: 13] of data by the base station over a frequency subchannel to the mobile station in a time slot [FEATURE ID: 13] ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme [FEATURE ID: 14] and a corresponding subchannel configuration , the antenna transmission scheme comprising a transmission diversity scheme or a multiple [FEATURE ID: 15] - input multiple - output ( MIMO ) scheme [FEATURE ID: 16] and the corresponding subchannel configuration characterized by distributed subcarriers [FEATURE ID: 6] or localized subcarriers in the frequency domain ; and transmitting a data packet [FEATURE ID: 6] to the mobile station over the frequency subchannel in accordance [FEATURE ID: 17] with the mobile station - specific transmission parameters . 2 . The method in claim [FEATURE ID: 16] 1 , wherein the mobile station - specific transmission parameters further indicate a training pilot pattern [FEATURE ID: 18] . 3 . The method in claim 1 , wherein the mobile station - specific transmission parameters further indicate power control information [FEATURE ID: 6] . 4 . The method in claim 1 , wherein the antenna transmission scheme is based on a channel condition [FEATURE ID: 19] . 5 . The method in claim 1 , wherein the corresponding subchannel configuration is selected based on a channel condition . 6 . A base station serving a plurality of mobile stations in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the communication system utilizing a transmission structure with time slots in the time domain and frequency subchannels in the frequency domain , the base station comprising a transmitter [FEATURE ID: 2] configured to : transmit a control message to a mobile station over a control channel , wherein : the control message contains transmission parameters allocated to the mobile station for a subsequent transmission of data by the base station over a frequency subchannel to the mobile station in a time slot ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding subchannel configuration , the antenna transmission scheme comprising a transmission diversity scheme or a multiple - input multiple - output ( MIMO ) scheme and the corresponding subchannel configuration characterized by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 7 . The base station in claim 6 , further comprising a receiver [FEATURE ID: 2] configured to receive channel state information [FEATURE ID: 6]		1 . In a wireless communication system [FEATURE ID: 2] , a method [FEATURE ID: 1] comprising [TRANSITIVE ID: 3] : ( a ) transmitting [TRANSITIVE ID: 8] a set [FEATURE ID: 13] of one or more downlink calibration waveforms [FEATURE ID: 6] from a main transceiver [FEATURE ID: 2] via an array of antenna elements [FEATURE ID: 6] of a transmit [TRANSITIVE ID: 11] antenna array [FEATURE ID: 2] of the main transceiver to a remote transceiver [FEATURE ID: 10] , wherein the set of downlink calibration waveforms comprise [TRANSITIVE ID: 7] modulated [TRANSITIVE ID: 15] constant modulus calibration signals [FEATURE ID: 6] selected so that the dot product of any two calibration signals [FEATURE ID: 6] transmitted [TRANSITIVE ID: 12] from any two distinct antenna elements [FEATURE ID: 4] of the transmit array is a pure tone ; ( b ) processing the signals [FEATURE ID: 6] received at the remote transceiver corresponding to the downlink calibration waveforms , the processing to determine downlink signature related signals related to the downlink signature for the remote transceiver , wherein the downlink signature related signals are determined in relation [FEATURE ID: 17] to a reference antenna element [FEATURE ID: 19] of the transmit antenna array ; ( c ) transmitting the downlink signature related signals from the remote transceiver to the main transceiver ; and ( d ) determining the downlink signature of the remote transceiver from the downlink signature related signals received at the main transceiver . 2 . The method of claim [FEATURE ID: 16] 1 , further comprising : ( e ) transmitting a set of one or more uplink calibration waveforms [FEATURE ID: 6] from the remote transceiver to the main transceiver ; ( f ) processing at the main transceiver the received antenna signals [FEATURE ID: 6] corresponding to the uplink calibration signals [FEATURE ID: 6] transmitted from the remote transceiver , the processing determining the uplink signature for the remote transceiver ; and ( h ) determining a calibration function [FEATURE ID: 19] from the main transceiver from the uplink and downlink signatures for the remote transceiver . 3 . The method of claim 2 , wherein the uplink calibration signals are idle traffic waveforms . 4 . The method of claim 2 , wherein the uplink calibration signals are the downlink signature related signals . 5 . The method of claim 2 , further comprising : ( h ) determining at the main transceiver an uplink weight vector for receiving from the remote transceiver by processing received antenna signals received while the remote transceiver is transmitting to the main transceiver ; and ( j ) determining at the main transceiver a downlink weight vector [FEATURE ID: 5] for transmitting to the remote transceiver from the determined uplink weights [FEATURE ID: 9] and the calibration function . 6 . The method of claim 1 , wherein each of the set of downlink calibration waveforms conform to an air interface standard [FEATURE ID: 14] . 7 . The method of claim 1 , wherein the downlink calibration waveforms are transmitted during silent periods . 8 . The method of claim 1 , wherein the downlink calibration waveforms are transmitted only after a number [FEATURE ID: 13] of idle waveforms [FEATURE ID: 6] are transmitted from the main transceiver . 9 . The method of claim 1 , wherein the downlink calibration waveforms transmitted from the main transceiver in step ( a ) are designed to be robust to one or more of the set comprising frequency [FEATURE ID: 18]

Targeted Patent: Patent: US10075941B2 Filed: 2004-01-29 Issued: 2018-09-11 Patent Holder: (Original Assignee) Neocific Inc (Current Assignee) Neo Wireless LLC Inventor(s): Xiaodong Li, Titus Lo, Kemin Li, Haiming Huang Title: Methods and apparatus for multi-carrier communication systems with adaptive transmission and feedback	Cross Reference / Shared Meaning between the Lines	Charted Against: Patent: US6611506B1 Filed: 1999-01-21 Issued: 2003-08-26 Patent Holder: (Original Assignee) Lucent Technologies Inc (Current Assignee) Nokia of America Corp Inventor(s): Ching Yao Huang, Frances Jiang, Yuen-Yin L. Koo Title: Enhanced channel allocation among multiple carriers in a spread spectrum communications system
[FEATURE ID: 1] link adaptation method, method	procedure, methodology, technique, wireless method, apparatus, scheme, protocol	[FEATURE ID: 1] method
[FEATURE ID: 2] base station, transmission structure, control channel, frequency subchannel, multiple, channel condition, transmitter, receiver	channel, carrier, radio, network, transceiver, system, frequency	[FEATURE ID: 2] wireless communications system, geographic region, second carrier, communication system
[TRANSITIVE ID: 3] serving, comprising, transmitting, contains	supporting, communicating, providing, scheduling, managing, comprises, includes	[TRANSITIVE ID: 3] allocating, including, serving
[FEATURE ID: 4] mobile stations	sites, subscribers, vehicles, transmitters, sectors, nodes, antennas	[FEATURE ID: 4] multiple carriers
[FEATURE ID: 5] communication system	network, method, systems, transmission	[FEATURE ID: 5] system
[TRANSITIVE ID: 6] utilizing	providing, having, involving, incorporating, being, defining, applying	[TRANSITIVE ID: 6] comprising, determining
[FEATURE ID: 7] time slots, frequency domain, training pilot pattern	bandwidth, frequency, time, carriers, channels, spectrum, throughput	[FEATURE ID: 7] traffic
[FEATURE ID: 8] frequency subchannels, subchannel configuration	bandwidth, frequency, spectrum, carrier, second, subband, channelization	[FEATURE ID: 8] first frequency spectrum, second frequency spectrum different
[FEATURE ID: 9] mobile station	station, receiver, user, terminal	[FEATURE ID: 9] subscriber
[FEATURE ID: 10] transmission parameters	communications, transmission, bandwidth, allocation, resources	[FEATURE ID: 10] access
[FEATURE ID: 11] scheme, claim	figure, embodiment, requirement, aspect, clair, paragraph, feature	[FEATURE ID: 11] claim
[FEATURE ID: 12] power control information	traffic, power, data, information	[FEATURE ID: 12] differential electromagnetic interference
[FEATURE ID: 13] channel state information	data, power, measurements, parameters	[FEATURE ID: 13] measured
1 . A link adaptation method [FEATURE ID: 1] by a base station [FEATURE ID: 2] serving [TRANSITIVE ID: 3] a plurality of mobile stations [FEATURE ID: 4] in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system [FEATURE ID: 5] , the communication system utilizing [TRANSITIVE ID: 6] a transmission structure [FEATURE ID: 2] with time slots [FEATURE ID: 7] in the time domain and frequency subchannels [FEATURE ID: 8] in the frequency domain [FEATURE ID: 7] , the method [FEATURE ID: 1] comprising [TRANSITIVE ID: 3] : transmitting [TRANSITIVE ID: 3] a control message to a mobile station [FEATURE ID: 9] over a control channel [FEATURE ID: 2] , wherein : the control message contains [TRANSITIVE ID: 3] transmission parameters [FEATURE ID: 10] allocated to the mobile station for a subsequent transmission of data by the base station over a frequency subchannel [FEATURE ID: 2] to the mobile station in a time slot ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding subchannel configuration [FEATURE ID: 8] , the antenna transmission scheme comprising a transmission diversity scheme or a multiple [FEATURE ID: 2] - input multiple - output ( MIMO ) scheme [FEATURE ID: 11] and the corresponding subchannel configuration characterized by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 2 . The method in claim [FEATURE ID: 11] 1 , wherein the mobile station - specific transmission parameters further indicate a training pilot pattern [FEATURE ID: 7] . 3 . The method in claim 1 , wherein the mobile station - specific transmission parameters further indicate power control information [FEATURE ID: 12] . 4 . The method in claim 1 , wherein the antenna transmission scheme is based on a channel condition [FEATURE ID: 2] . 5 . The method in claim 1 , wherein the corresponding subchannel configuration is selected based on a channel condition . 6 . A base station serving a plurality of mobile stations in an Orthogonal Frequency Division Multiplexing ( OFDM ) communication system , the communication system utilizing a transmission structure with time slots in the time domain and frequency subchannels in the frequency domain , the base station comprising a transmitter [FEATURE ID: 2] configured to : transmit a control message to a mobile station over a control channel , wherein : the control message contains transmission parameters allocated to the mobile station for a subsequent transmission of data by the base station over a frequency subchannel to the mobile station in a time slot ; and the mobile station - specific transmission parameters indicate an antenna transmission scheme and a corresponding subchannel configuration , the antenna transmission scheme comprising a transmission diversity scheme or a multiple - input multiple - output ( MIMO ) scheme and the corresponding subchannel configuration characterized by distributed subcarriers or localized subcarriers in the frequency domain ; and transmitting a data packet to the mobile station over the frequency subchannel in accordance with the mobile station - specific transmission parameters . 7 . The base station in claim 6 , further comprising a receiver [FEATURE ID: 2] configured to receive channel state information [FEATURE ID: 13]		1 . A method [FEATURE ID: 1] for allocating [TRANSITIVE ID: 3] traffic [FEATURE ID: 7] between multiple carriers [FEATURE ID: 4] in a wireless communications system [FEATURE ID: 2] , the system [FEATURE ID: 5] including [TRANSITIVE ID: 3] at least a first carrier within a first frequency spectrum [FEATURE ID: 8] and serving [TRANSITIVE ID: 3] a geographic region [FEATURE ID: 2] and a second carrier [FEATURE ID: 2] within a second frequency spectrum different [FEATURE ID: 8] from the first frequency spectrum and serving the geographic region , the method comprising [TRANSITIVE ID: 6] : determining [TRANSITIVE ID: 6] a threshold based upon differential electromagnetic interference [FEATURE ID: 12] measured [TRANSITIVE ID: 13] within the second frequency spectrum relative to the first frequency spectrum in the geographic region , the threshold ranging from a maximum at a highest measured differential interference to a minimum at a lowest measured differential interference ; prohibiting inter-carrier hand - offs between the first carrier and the second carrier at the maximum ; and allowing inter-carrier hand - offs below the maximum . 2 . The method according to claim [FEATURE ID: 11] 1 , further comprising : receiving a subscriber ' s request for access [FEATURE ID: 10] to the communication system [FEATURE ID: 2] via the first carrier ; measuring a first loading level on the first carrier ; measuring a second loading level on the second carrier ; selecting one of the first and second carriers based on at least one of a comparison of the first loading level to the second loading level and on a comparison of a difference between the first and second loading levels to the threshold . 3 . The method according to claim 2 , wherein said selecting further includes : selecting the first carrier to service a subscriber [FEATURE ID: 9]