| Targeted Patent: Patent: US8467366B2 Filed: 2004-03-09 Issued: 2013-06-18 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 random access in multi-carrier communication systems | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US20040042386A1 Filed: 2001-07-31 Issued: 2004-03-04 Patent Holder: (Original Assignee) Individual (Current Assignee) Panasonic Holdings Corp Inventor(s): Mitsuru Uesugi, Kazunori Inogai, Atsushi Sumasu Title: Data transmission apparatus and data transmission method |
| [FEATURE ID: 1] multi-cell orthogonal frequency division multiple access, transmit, signal, sequence, time domain | symbol, spread, uplink, message, burst, channel, radio | [FEATURE ID: 1] transmission, data |
| [FEATURE ID: 2] wireless communication system, base stations, base station | transceiver, system, radio, base, network, scheme, terminal | [FEATURE ID: 2] data transmission apparatus |
| [TRANSITIVE ID: 3] comprising | including, employing, utilizing, with, of, include, by | [TRANSITIVE ID: 3] combining, comprising, using |
| [FEATURE ID: 4] mobile station, apparatus | means, unit, transmitter, processor, device, adder, circuit | [FEATURE ID: 4] section, multiplexer |
| [FEATURE ID: 5] communication channel | radio, frequency, antenna, communication | [FEATURE ID: 5] CDMA method |
| [FEATURE ID: 6] data signal, ranging | request, signaling, data, channel, user, timing, packet | [FEATURE ID: 6] propagation condition |
| [TRANSITIVE ID: 7] comprises | consists, includes, represents, uses, contains, has, combines | [TRANSITIVE ID: 7] composed |
| [FEATURE ID: 8] adjacent, different | common, same, identical, unique, parallel, equal, uniform | [FEATURE ID: 8] orthogonal variable, similar, different |
| [FEATURE ID: 9] non-adjacent subcarriers, symbols, subcarriers | signals, channels, cells, segments, tones, carriers, slots | [FEATURE ID: 9] transmission data |
| [TRANSITIVE ID: 10] formed | generated, modulated, transmitted, encoded, obtained, scrambled, sent | [TRANSITIVE ID: 10] spread |
| [FEATURE ID: 11] sequences, power levels, subchannels | frequencies, symbols, resources, signals, parameters, values, messages | [FEATURE ID: 11] factors |
| [FEATURE ID: 12] multiple orthogonal frequency division multiplexing | several, symbol, two, plural | [FEATURE ID: 12] multiple integer |
| [FEATURE ID: 13] OFDM, subcarrier configuration | type, frequency, data, modulation, structure, allocation, arrangement | [FEATURE ID: 13] modulation method |
| [FEATURE ID: 14] low peak, average power ratio | minimum, peak, code, mean, average, maximal, bandwidth | [FEATURE ID: 14] total |
| [FEATURE ID: 15] claim | clam, claimed, paragraph, item, invention, statement, aspect | [FEATURE ID: 15] claim |
| [FEATURE ID: 16] subcarrier configurations | the, which, each, that | [FEATURE ID: 16] being |
| 1 . In a multi-cell orthogonal frequency division multiple access [FEATURE ID: 1] ( OFDMA ) wireless communication system [FEATURE ID: 2] comprising [TRANSITIVE ID: 3] a plurality of base stations [FEATURE ID: 2] and mobile stations , a mobile station [FEATURE ID: 4] configured to communicate with a serving base station [FEATURE ID: 2] in a cell via a communication channel [FEATURE ID: 5] , the mobile station comprising : an apparatus [FEATURE ID: 4] configured to transmit [TRANSITIVE ID: 1] a data signal [FEATURE ID: 6] to the serving base station in the cell over a data subchannel , wherein the data subchannel comprises [TRANSITIVE ID: 7] a plurality of adjacent [FEATURE ID: 8] or non-adjacent subcarriers [FEATURE ID: 9] within the communication channel ; and an apparatus configured to transmit a ranging [TRANSITIVE ID: 6] signal [FEATURE ID: 1] to the serving base station in the cell over a ranging subchannel for random access , wherein : the ranging signal is formed [TRANSITIVE ID: 10] from a ranging sequence [FEATURE ID: 1] selected from a set of ranging sequences [FEATURE ID: 11] associated with the cell for identifying the mobile station ; the ranging signal lasts over a period of one or multiple orthogonal frequency division multiplexing [FEATURE ID: 12] ( OFDM [FEATURE ID: 13] ) symbols [FEATURE ID: 9] and the ranging signal exhibits a low peak [FEATURE ID: 14] - to - average power ratio [FEATURE ID: 14] in the time domain [FEATURE ID: 1] ; and the ranging subchannel comprises at least one block of subcarriers [FEATURE ID: 9] within the communication channel and power levels [FEATURE ID: 11] of subcarriers at both ends of a block are set to zero . 2 . The mobile station of claim [FEATURE ID: 15] 1 , wherein the subcarrier configuration [FEATURE ID: 13] of the ranging subchannel for the cell is different [FEATURE ID: 8] from subcarrier configurations [FEATURE ID: 16] of ranging subchannels [FEATURE ID: 11] |
1 . A data transmission apparatus [FEATURE ID: 2] that performs transmission [FEATURE ID: 1] of data [FEATURE ID: 1] by combining [TRANSITIVE ID: 3] multicarrier modulation method [FEATURE ID: 13] and CDMA method [FEATURE ID: 5] , wherein said data transmission apparatus comprising [TRANSITIVE ID: 3] : spreading section [FEATURE ID: 4] that spreads simultaneously a plurality of transmission data [FEATURE ID: 9] in both directions , frequency axis direction and time axis direction using [TRANSITIVE ID: 3] two dimensional orthogonal spreading code which composed [TRANSITIVE ID: 7] of orthogonal variable [FEATURE ID: 8] spreading factor of frequency axis direction and orthogonal variable spreading factor of time axis direction ; and multiplexer [FEATURE ID: 4] that multiplexes said a plurality of transmission data after being [TRANSITIVE ID: 16] spread [TRANSITIVE ID: 10] . 2 . The data transmission apparatus according to claim [FEATURE ID: 15] 1 further comprising : first generator that generates first spreading code that is used in frequency axis direction in orthogonal variable spreading factor ; and second generator that generates second spreading code that is used in time axis direction in orthogonal variable spreading factor , wherein said spreading section performs simultaneously spreading processing on both frequency axis direction and time axis direction used in first spreading code generated by said first generator and second spreading code generated by said second generator . 3 . The data transmission apparatus according to claim 1 , wherein said two dimensional orthogonal spreading code of which the spreading factors [FEATURE ID: 11] of frequency axis direction are similar [FEATURE ID: 8] , and the spreading factors of time axis direction are also similar during said a plurality of transmission data . 4 . The data transmission apparatus according to claim 1 , wherein said two dimensional orthogonal spreading code of which the spreading factors of frequency axis direction are similar , and the spreading factors of time axis direction are different [FEATURE ID: 8] only in multiple integer [FEATURE ID: 12] ; and the symbol portion of time - axis direction in two dimensional orthogonal spreading code of which spreading factor of the time - axis direction is maximum matches the symbol portions of the time - axis directions in all other two dimensional orthogonal spreading code . 5 . The data transmission apparatus according to claim 1 , wherein said two dimensional orthogonal spreading code of which the spreading factors of time axis direction are similar , and spreading factors of frequency axis direction are different only in multiple integer ; and the symbol portion of frequency - axis direction in the two dimensional orthogonal spreading code of which spreading factor of the frequency - axis direction is maximum matches the symbol portions of the frequency - axis directions in all other two dimensional orthogonal spreading code . 6 . The data transmission apparatus according to claim 1 , wherein said two dimensional orthogonal spreading code of which the spreading factors of frequency axis direction are different in only multiple integer , and spreading factors of time axis direction are also different only in multiple integer ; and the symbol portion of frequency axis direction in the two dimensional orthogonal spreading code of which spreading factor of the frequency axis direction is maximum matches the symbol portions of the frequency axis directions in all other two dimensional orthogonal spreading code , in addition , the symbol portion of time axis direction in two dimensional orthogonal spreading code of which spreading factor of the time axis direction is maximum matches the symbol portions of the time axis directions in all other two dimensional orthogonal spreading code . 7 . The data transmission apparatus according to claim 1 , wherein said two dimensional orthogonal spreading code of which has fixed total [FEATURE ID: 14] spreading factor is obtained by multiplying spreading factor of frequency axis direction with spreading factor of time axis direction ; and the symbol portion of frequency axis direction in two dimensional orthogonal spreading code of which spreading factor of the frequency - axis direction is maximum matches the symbol portions of the frequency axis directions in all other two dimensional orthogonal spreading code , in addition , the symbol portion of time axis direction in two dimensional orthogonal spreading code of which spreading factor of the time axis direction is maximum matches the symbol portions of the time axis directions in all other two dimensional orthogonal spreading code . 8 . The data transmission apparatus according to claim 1 , wherein said two dimensional orthogonal spreading code of which the spreading factor of frequency axis direction and the spreading factor of time axis direction can be changed based on propagation condition [FEATURE ID: 6] |
| Targeted Patent: Patent: US8467366B2 Filed: 2004-03-09 Issued: 2013-06-18 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 random access in multi-carrier communication systems | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US6615050B1 Filed: 1992-03-05 Issued: 2003-09-02 Patent Holder: (Original Assignee) Qualcomm Inc (Current Assignee) Qualcomm Inc Inventor(s): Edward G. Tiedemann, Jr., Lindsay A. Weaver, Jr., Roberto Padovani Title: Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communication system |
| [FEATURE ID: 1] wireless communication system, data signal, subchannel, sequence, time domain | radio, channel, transceiver, slot, system, transmission, transmitter | [FEATURE ID: 1] communication channel, different access channel, mobile radio unit, communications system |
| [TRANSITIVE ID: 2] comprising | implementing, containing, comprises, featuring, by, encompassing, incorporating | [TRANSITIVE ID: 2] comprising |
| [FEATURE ID: 3] base stations, mobile stations, symbols, subcarriers, subchannels, other cells | channels, carriers, cells, subscribers, terminals, pilots, transmissions | [FEATURE ID: 3] first transceivers, base station, mobile radio units |
| [FEATURE ID: 4] mobile station, serving, cell, apparatus | transmitter, mobile, device, unit, receiver, station, base | [FEATURE ID: 4] method, second transceiver, mobile radio telephone, means, first power level |
| [TRANSITIVE ID: 5] communicate | transmit, establish, exchange, wireless | [TRANSITIVE ID: 5] initiate |
| [FEATURE ID: 6] base station | station, unit, device, transmitter, one | [FEATURE ID: 6] first transceiver |
| [FEATURE ID: 7] communication channel, low peak, block | burst, preamble, beam, probe, beacon, packet, channel | [FEATURE ID: 7] access probe, signal |
| [TRANSITIVE ID: 8] transmit | signal, broadcast, transmission, output, emit, transmitting, relay | [TRANSITIVE ID: 8] transmitted, retransmit |
| [FEATURE ID: 9] adjacent | frequency, single, orthogonal, fixed, discrete | [FEATURE ID: 9] spread |
| [FEATURE ID: 10] non-adjacent subcarriers, power levels | frequencies, symbols, cells, values, blocks, channels, groups | [FEATURE ID: 10] codes |
| [TRANSITIVE ID: 11] ranging, random access | synchronization, signaling, registration, detection, access, transmissions, tracking | [TRANSITIVE ID: 11] communication, access channel interference |
| [FEATURE ID: 12] signal | sequence, symbol, channel, tone, number | [FEATURE ID: 12] code |
| [TRANSITIVE ID: 13] formed, selected, associated, different | provided, defined, generated, obtained, identified, derived, specified | [TRANSITIVE ID: 13] used, determined, received |
| [FEATURE ID: 14] set, period | series, sequence, block, range, combination, group, list | [FEATURE ID: 14] predefined set |
| [FEATURE ID: 15] sequences | bits, parameters, values, channels | [FEATURE ID: 15] information |
| [FEATURE ID: 16] OFDM | data, modulation, pilot, access | [FEATURE ID: 16] spectrum signal coding |
| [FEATURE ID: 17] average power ratio | power, threshold, value, maximum, minimum | [FEATURE ID: 17] level |
| [FEATURE ID: 18] claim | step, item, embodiment, invention, figure, clair, claimed | [FEATURE ID: 18] claim |
| [FEATURE ID: 19] subcarrier configurations | that, each, which, the | [FEATURE ID: 19] said |
| 1 . In a multi-cell orthogonal frequency division multiple access ( OFDMA ) wireless communication system [FEATURE ID: 1] comprising [TRANSITIVE ID: 2] a plurality of base stations [FEATURE ID: 3] and mobile stations [FEATURE ID: 3] , a mobile station [FEATURE ID: 4] configured to communicate [TRANSITIVE ID: 5] with a serving [TRANSITIVE ID: 4] base station [FEATURE ID: 6] in a cell [FEATURE ID: 4] via a communication channel [FEATURE ID: 7] , the mobile station comprising : an apparatus [FEATURE ID: 4] configured to transmit [TRANSITIVE ID: 8] a data signal [FEATURE ID: 1] to the serving base station in the cell over a data subchannel , wherein the data subchannel comprises a plurality of adjacent [FEATURE ID: 9] or non-adjacent subcarriers [FEATURE ID: 10] within the communication channel ; and an apparatus configured to transmit a ranging [TRANSITIVE ID: 11] signal [FEATURE ID: 12] to the serving base station in the cell over a ranging subchannel [FEATURE ID: 1] for random access [FEATURE ID: 11] , wherein : the ranging signal is formed [TRANSITIVE ID: 13] from a ranging sequence [FEATURE ID: 1] selected [TRANSITIVE ID: 13] from a set [FEATURE ID: 14] of ranging sequences [FEATURE ID: 15] associated [TRANSITIVE ID: 13] with the cell for identifying the mobile station ; the ranging signal lasts over a period [FEATURE ID: 14] of one or multiple orthogonal frequency division multiplexing ( OFDM [FEATURE ID: 16] ) symbols [FEATURE ID: 3] and the ranging signal exhibits a low peak [FEATURE ID: 7] - to - average power ratio [FEATURE ID: 17] in the time domain [FEATURE ID: 1] ; and the ranging subchannel comprises at least one block [FEATURE ID: 7] of subcarriers [FEATURE ID: 3] within the communication channel and power levels [FEATURE ID: 10] of subcarriers at both ends of a block are set to zero . 2 . The mobile station of claim [FEATURE ID: 18] 1 , wherein the subcarrier configuration of the ranging subchannel for the cell is different [FEATURE ID: 13] from subcarrier configurations [FEATURE ID: 19] of ranging subchannels [FEATURE ID: 3] for other cells [FEATURE ID: 3] |
1 . A method [FEATURE ID: 4] for reducing interference in a communication channel [FEATURE ID: 1] used [TRANSITIVE ID: 13] by at least one of a plurality of first transceivers [FEATURE ID: 3] to initiate [TRANSITIVE ID: 5] communication [FEATURE ID: 11] with a second transceiver [FEATURE ID: 4] , said [TRANSITIVE ID: 19] method comprising [TRANSITIVE ID: 2] the steps of : transmitting from said at least one first transceiver [FEATURE ID: 6] an access probe [FEATURE ID: 7] at a first level of power , said first level of power being determined [TRANSITIVE ID: 13] on the basis of amount of power at which a signal [FEATURE ID: 7] transmitted [TRANSITIVE ID: 8] from said second transceiver is received [TRANSITIVE ID: 13] ; determining whether said access probe has been received at said second transceiver ; and retransmitting said access probe from said at least one first transceiver at a level [FEATURE ID: 17] of power greater than said first level of power until said access probe is received at said second transceiver . 2 . The method of claim [FEATURE ID: 18] 1 further including the step of upon receiving said access probe , transmitting an acknowledgment signal from said second transceiver to said at least one first transceiver . 3 . The method of claim 1 wherein said at least one first transceiver is a mobile radio telephone [FEATURE ID: 4] and said second transceiver is a base station [FEATURE ID: 3] . 4 . The method of claim 1 wherein said access probe is transmitted using spread [FEATURE ID: 9] - spectrum signal coding [FEATURE ID: 16] . 5 . The method of claim 1 wherein said step of transmitting further includes the step of generating said access probe using a spreading code [FEATURE ID: 12] selected from a predefined set [FEATURE ID: 14] of spreading codes [FEATURE ID: 10] . 6 . The method of claim 5 wherein said predefined set of codes are determined from information [FEATURE ID: 15] broadcast by said second transceiver , each code in said predefined set corresponding to a different access channel [FEATURE ID: 1] . 7 . A mobile radio unit [FEATURE ID: 1] for communicating with a base station , comprising : means for transmitting an access probe at a first level of power to said base station , said first level of power being determined on the basis of amount of power at which a signal transmitted from said base station is received ; means for detecting an acknowledgment signal from said base station ; and means for commanding said means [FEATURE ID: 4] for transmitting to retransmit [FEATURE ID: 8] said access probe at an increased level of power if said acknowledgment signal has not been detected . 8 . The mobile radio unit of claim 7 wherein said means for transmitting includes means for selecting a spreading code corresponding to an access channel in accordance with access channel information broadcast by said base station . 9 . A communications system [FEATURE ID: 1] with minimized access channel interference [FEATURE ID: 11] , comprising : a plurality of mobile radio units [FEATURE ID: 3] , each mobile radio unit including : means for transmitting an access probe initially at a first power level [FEATURE ID: 4] |
| Targeted Patent: Patent: US8467366B2 Filed: 2004-03-09 Issued: 2013-06-18 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 random access in multi-carrier communication systems | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US20030072255A1 Filed: 2001-10-17 Issued: 2003-04-17 Patent Holder: (Original Assignee) Nortel Networks Ltd (Current Assignee) Apple Inc Inventor(s): Jianglei Ma, Ming Jia, Peiying Zhu, Wen Tong Title: System access and synchronization methods for MIMO OFDM communications systems and physical layer packet and preamble design |
| [FEATURE ID: 1] mobile stations, other cells | channels, terminals, carriers, satellites, beams, subscribers, users | [FEATURE ID: 1] antennas |
| [FEATURE ID: 2] mobile station, base station, communication channel | device, receiver, transceiver, system, station, radio, unit | [FEATURE ID: 2] OFDM transmitter, antenna, transmitter |
| [TRANSITIVE ID: 3] configured | connected, implemented, programmed, suitable, coupled, equipped, enabled | [TRANSITIVE ID: 3] adapted |
| [TRANSITIVE ID: 4] transmit | modulate, provide, deliver, process, generate, send, output | [TRANSITIVE ID: 4] transmit |
| [FEATURE ID: 5] data signal, signal, period, time domain | channel, payload, symbol, burst, transmission, sequence, prefix | [FEATURE ID: 5] header symbol format, header OFDM symbol, dedicated pilot channel, preamble, pilot channel |
| [FEATURE ID: 6] adjacent | different, similar, shared, same, identical, distinct, consecutive | [FEATURE ID: 6] multiplexed, common, respective |
| [FEATURE ID: 7] non-adjacent subcarriers, sequences, power levels, subchannels | slots, signals, bits, segments, frequencies, symbols, blocks | [FEATURE ID: 7] sub-carriers, header symbols, identical OFDM symbols, pilot channel sub-carriers |
| [TRANSITIVE ID: 8] ranging | training, detection, synchronization, transmission, tracking, data | [TRANSITIVE ID: 8] efficient BTS identification |
| [FEATURE ID: 9] random access | acquisition, synchronization, detection, tracking, demodulation, access, timing | [FEATURE ID: 9] accurate initial acquisition, fine synchronization |
| [FEATURE ID: 10] sequence, subcarrier configuration | pattern, set, structure, portion, signal, symbol, value | [FEATURE ID: 10] complex sequence |
| [FEATURE ID: 11] set | collection, series, number, range, sequence, combination, subset | [FEATURE ID: 11] non-contiguous set, respective set, different set |
| [TRANSITIVE ID: 12] associated, different | unique, common, defined, used, allocated, known, not | [TRANSITIVE ID: 12] assigned, different |
| [FEATURE ID: 13] multiple orthogonal frequency division multiplexing | three, eight, four, several, two, multiple | [FEATURE ID: 13] N antennas |
| [FEATURE ID: 14] symbols | signals, carriers, frame, slots, transmissions, symbol | [FEATURE ID: 14] header OFDM symbols |
| [FEATURE ID: 15] subcarriers | bandwidth, slots, space, time, symbols, intervals | [FEATURE ID: 15] N sub-carriers |
| [FEATURE ID: 16] claim | step, claimed, paragraph, item, clam, cl claim, aspect | [FEATURE ID: 16] claim |
| 1 . In a multi-cell orthogonal frequency division multiple access ( OFDMA ) wireless communication system comprising a plurality of base stations and mobile stations [FEATURE ID: 1] , a mobile station [FEATURE ID: 2] configured [TRANSITIVE ID: 3] to communicate with a serving base station [FEATURE ID: 2] in a cell via a communication channel [FEATURE ID: 2] , the mobile station comprising : an apparatus configured to transmit [TRANSITIVE ID: 4] a data signal [FEATURE ID: 5] to the serving base station in the cell over a data subchannel , wherein the data subchannel comprises a plurality of adjacent [FEATURE ID: 6] or non-adjacent subcarriers [FEATURE ID: 7] within the communication channel ; and an apparatus configured to transmit a ranging [TRANSITIVE ID: 8] signal [FEATURE ID: 5] to the serving base station in the cell over a ranging subchannel for random access [FEATURE ID: 9] , wherein : the ranging signal is formed from a ranging sequence [FEATURE ID: 10] selected from a set [FEATURE ID: 11] of ranging sequences [FEATURE ID: 7] associated [TRANSITIVE ID: 12] with the cell for identifying the mobile station ; the ranging signal lasts over a period [FEATURE ID: 5] of one or multiple orthogonal frequency division multiplexing [FEATURE ID: 13] ( OFDM ) symbols [FEATURE ID: 14] and the ranging signal exhibits a low peak - to - average power ratio in the time domain [FEATURE ID: 5] ; and the ranging subchannel comprises at least one block of subcarriers [FEATURE ID: 15] within the communication channel and power levels [FEATURE ID: 7] of subcarriers at both ends of a block are set to zero . 2 . The mobile station of claim [FEATURE ID: 16] 1 , wherein the subcarrier configuration [FEATURE ID: 10] of the ranging subchannel for the cell is different [FEATURE ID: 12] from subcarrier configurations of ranging subchannels [FEATURE ID: 7] for other cells [FEATURE ID: 1] |
1 . A MIMO - OFDM transmitter [FEATURE ID: 2] adapted [TRANSITIVE ID: 3] to transmit [TRANSITIVE ID: 4] a header symbol format [FEATURE ID: 5] in which sub-carriers [FEATURE ID: 7] of a header OFDM symbol [FEATURE ID: 5] are divided into a non-contiguous set [FEATURE ID: 11] of sub-carriers for each of a plurality of antennas [FEATURE ID: 1] , with each antenna [FEATURE ID: 2] transmitting the header OFDM symbol only on the respective set [FEATURE ID: 11] of sub-carriers . 2 . A transmitter [FEATURE ID: 2] according to claim [FEATURE ID: 16] 1 wherein there are N antennas [FEATURE ID: 13] and a different set [FEATURE ID: 11] of sub-carriers separated by N sub-carriers [FEATURE ID: 15] is assigned [TRANSITIVE ID: 12] to each of the plurality of antennas . 3 . A transmitter according to claim 1 wherein the header symbols [FEATURE ID: 7] contain a multiplexed [TRANSITIVE ID: 6] dedicated pilot channel [FEATURE ID: 5] on dedicated pilot channel sub-carriers and common synchronization channel on common synchronization channel sub-carriers for each of the plurality of antennas . 4 . A transmitter according to claim 3 wherein the header OFDM symbols [FEATURE ID: 14] further contain multiplexed broadcasting sub-carriers for each of the plurality of antennas . 5 . A transmitter according to claim 1 , adapted to transmit a preamble [FEATURE ID: 5] having a prefix , followed by two identical OFDM symbols [FEATURE ID: 7] having said header OFDM symbol format . 6 . A transmitter according to claim 5 wherein the prefix is a cyclic extension of the two identical OFDM symbols . 7 . A transmitter according to claim 3 wherein the pilot channel sub-carriers [FEATURE ID: 7] have a BTS specific mapped complex sequence [FEATURE ID: 10] allowing efficient BTS identification [FEATURE ID: 8] . 8 . A transmitter according to any one of claims 3 wherein the common synchronization channel is designed for fast and accurate initial acquisition [FEATURE ID: 9] . 9 . A transmitter according to claim 3 wherein the common synchronization channel is used for course synchronization and fine synchronization [FEATURE ID: 9] and the pilot channel [FEATURE ID: 5] is used for fine synchronization . 10 . A transmitter according to claim 3 wherein the common synchronization channel is used to transmit a complex sequence which is different [FEATURE ID: 12] for each transmit antenna of one transmitter , but which is common [FEATURE ID: 6] for respective [FEATURE ID: 6] |
| Targeted Patent: Patent: US8467366B2 Filed: 2004-03-09 Issued: 2013-06-18 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 random access in multi-carrier communication systems | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US6539320B1 Filed: 1998-12-24 Issued: 2003-03-25 Patent Holder: (Original Assignee) Mitsubishi Electric Corp (Current Assignee) Mitsubishi Electric Corp Inventor(s): Wieslaw Jerzy Szajnowski, Paul A. Ratliff Title: Time delay determination and determination of signal shift |
| [TRANSITIVE ID: 1] comprising | of, containing, for, utilizing, incorporating, involving, employing | [TRANSITIVE ID: 1] comprising, using |
| [FEATURE ID: 2] mobile station, communication channel | transmitter, signal, radio, device, receiver, repeater, terminal | [FEATURE ID: 2] delay path, other signal |
| [TRANSITIVE ID: 3] configured, selected | provided, generated, disposed, located, taken, assigned, arranged | [TRANSITIVE ID: 3] occurring |
| [TRANSITIVE ID: 4] serving, low peak | reference, target, respective, corresponding, sample, pulse, pair | [TRANSITIVE ID: 4] first, second, reference signal |
| [FEATURE ID: 5] data signal | sequence, transmission, response, data | [FEATURE ID: 5] determined delay |
| [FEATURE ID: 6] adjacent | successive, consecutive, individual, discrete, overlapping, equidistant, different | [FEATURE ID: 6] combining, aperiodic |
| [FEATURE ID: 7] non-adjacent subcarriers, power levels, subcarrier configurations | components, values, samples, symbols, periods, regions, elements | [FEATURE ID: 7] segments, parts, respective events, signals |
| [TRANSITIVE ID: 8] ranging | distance, timing, transmission, latency | [TRANSITIVE ID: 8] distance measurement |
| [FEATURE ID: 9] signal | frame, sequence, signals, pulse | [FEATURE ID: 9] second signal |
| [FEATURE ID: 10] random access | acquisition, timing, reception, detection | [FEATURE ID: 10] sampling |
| [TRANSITIVE ID: 11] formed, associated | defined, provided, obtained, established, originating, identified, made | [TRANSITIVE ID: 11] derived |
| [FEATURE ID: 12] sequence, average power ratio | pattern, length, parameter, signal, set, vector, duration | [FEATURE ID: 12] feature, succession, value, number, delay |
| [FEATURE ID: 13] set, sets | subset, series, collection, plurality, cluster, number, range | [FEATURE ID: 13] combination |
| [FEATURE ID: 14] sequences | signals, sequence, series, values | [FEATURE ID: 14] events |
| [FEATURE ID: 15] period, time domain | duration, region, cycle, time, bandwidth, block, range | [FEATURE ID: 15] event, segment, speed |
| [FEATURE ID: 16] symbols | units, slots, cycles, intervals, samples | [FEATURE ID: 16] times |
| [FEATURE ID: 17] subcarriers, ends | frequency, locations, nodes, data, segments, boundaries, points | [FEATURE ID: 17] non-uniform intervals, samples |
| [FEATURE ID: 18] claim | step, embodiment, item, previous claim, figure, clair, claimed | [FEATURE ID: 18] claim |
| 1 . In a multi-cell orthogonal frequency division multiple access ( OFDMA ) wireless communication system comprising [TRANSITIVE ID: 1] a plurality of base stations and mobile stations , a mobile station [FEATURE ID: 2] configured [TRANSITIVE ID: 3] to communicate with a serving [TRANSITIVE ID: 4] base station in a cell via a communication channel [FEATURE ID: 2] , the mobile station comprising : an apparatus configured to transmit a data signal [FEATURE ID: 5] to the serving base station in the cell over a data subchannel , wherein the data subchannel comprises a plurality of adjacent [FEATURE ID: 6] or non-adjacent subcarriers [FEATURE ID: 7] within the communication channel ; and an apparatus configured to transmit a ranging [TRANSITIVE ID: 8] signal [FEATURE ID: 9] to the serving base station in the cell over a ranging subchannel for random access [FEATURE ID: 10] , wherein : the ranging signal is formed [TRANSITIVE ID: 11] from a ranging sequence [FEATURE ID: 12] selected [TRANSITIVE ID: 3] from a set [FEATURE ID: 13] of ranging sequences [FEATURE ID: 14] associated [TRANSITIVE ID: 11] with the cell for identifying the mobile station ; the ranging signal lasts over a period [FEATURE ID: 15] of one or multiple orthogonal frequency division multiplexing ( OFDM ) symbols [FEATURE ID: 16] and the ranging signal exhibits a low peak [FEATURE ID: 4] - to - average power ratio [FEATURE ID: 12] in the time domain [FEATURE ID: 15] ; and the ranging subchannel comprises at least one block of subcarriers [FEATURE ID: 17] within the communication channel and power levels [FEATURE ID: 7] of subcarriers at both ends [FEATURE ID: 17] of a block are set to zero . 2 . The mobile station of claim [FEATURE ID: 18] 1 , wherein the subcarrier configuration of the ranging subchannel for the cell is different from subcarrier configurations [FEATURE ID: 7] of ranging subchannels for other cells . 3 . The mobile station of claim 1 , wherein the set of ranging sequences for the cell is different from sets [FEATURE ID: 13] |
1 . A method of determining the amount by which one signal is delayed with respect to another signal , the method comprising [TRANSITIVE ID: 1] deriving from a first [FEATURE ID: 4] of the signals events occurring [TRANSITIVE ID: 3] at non-uniform intervals [FEATURE ID: 17] , using [TRANSITIVE ID: 1] each event [FEATURE ID: 15] to define a segment [FEATURE ID: 15] of the second signal [FEATURE ID: 9] , forming a representation of a combination [FEATURE ID: 13] of the segments [FEATURE ID: 7] and determining the delay amount from the position within the representation of a feature [FEATURE ID: 12] derived [TRANSITIVE ID: 11] from combining [TRANSITIVE ID: 6] parts [FEATURE ID: 7] of the second signal associated with the respective events [FEATURE ID: 7] derived from the first signal . 2 . A method of measuring the amount by which one signal is delayed with respect to a corresponding signal , the method comprising deriving from a first of the signals events which are spaced apart by a succession [FEATURE ID: 12] of non-uniform intervals , using the events [FEATURE ID: 14] to trigger the sampling [FEATURE ID: 10] of a second [FEATURE ID: 4] of the signals [FEATURE ID: 7] , and combining the samples [FEATURE ID: 17] to derive a value [FEATURE ID: 12] which is influenced by the number [FEATURE ID: 12] of times [FEATURE ID: 16] the sampling has substantially coincided with parts of the second signal which correspond with respective events derived from the first signal , repeating the sampling with different delays between the second signal and the succession of events , and selecting the delay [FEATURE ID: 12] associated with the greatest degree of coincidence . 3 . A method as claimed in claim [FEATURE ID: 18] 1 , wherein the events are at least substantially aperiodic [FEATURE ID: 6] . 4 . A method as claimed in claim 1 , wherein one of the signals has been transmitted and received via a delay path [FEATURE ID: 2] , and the other signal [FEATURE ID: 2] comprises a reference signal [FEATURE ID: 4] , the method being used to determine the delay associated with the delay path . 5 . A method as claimed in claim 4 , when the method comprises calculating a distance measurement [FEATURE ID: 8] from the determined delay [FEATURE ID: 5] . 6 . A method as claimed in claim 4 , comprising calculating the speed [FEATURE ID: 15] |
| Targeted Patent: Patent: US8467366B2 Filed: 2004-03-09 Issued: 2013-06-18 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 random access in multi-carrier communication systems | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US6535736B1 Filed: 1998-12-11 Issued: 2003-03-18 Patent Holder: (Original Assignee) Lucent Technologies Inc (Current Assignee) Nokia of America Corp ; WSOU Investments LLC Inventor(s): Dan Anthony Balogh, John K. Burgess, Terry Si-Fong Cheng, Ching Yao Huang, Shawn S. Yu Title: System and method for variably delaying access requests in wireless communications system |
| [FEATURE ID: 1] multi-cell orthogonal frequency division multiple access | broadcast, distributed, radio, wireless | [FEATURE ID: 1] shared |
| [TRANSITIVE ID: 2] comprising | containing, providing, involving, including, comprises, for, of | [TRANSITIVE ID: 2] comprising, representing |
| [FEATURE ID: 3] base stations, mobile stations, communicate, subchannel, symbols, time domain, subcarriers, other cells | carriers, cells, access, networks, resources, bandwidth, communication | [FEATURE ID: 3] access channel, terminals, resource, access channels, channels |
| [FEATURE ID: 4] mobile station, base station, communication channel | device, node, communication, transmitter, terminal, cell, means | [FEATURE ID: 4] method |
| [TRANSITIVE ID: 5] serving | respective, specific, given, corresponding | [TRANSITIVE ID: 5] said |
| [FEATURE ID: 6] apparatus | arrangement, indicator, interface, actuator | [FEATURE ID: 6] adjustment signal |
| [FEATURE ID: 7] data signal, ranging, random access, subchannels | signaling, transmission, request, data, communication, traffic, channel | [FEATURE ID: 7] access requests, adjustment signal available, messages, message preamble, message capsule, measurement interval |
| [FEATURE ID: 8] non-adjacent subcarriers, power levels | symbols, blocks, signals, bursts, cells, segments, samples | [FEATURE ID: 8] sequential access slots, slots, frames, occupied access slots, access channel frames |
| [FEATURE ID: 9] signal | frame, burst, message, sequence, channel, preamble | [FEATURE ID: 9] Access Channel preamble minus |
| [TRANSITIVE ID: 10] formed, selected, associated | provided, defined, generated, specified, identified, configured, determined | [TRANSITIVE ID: 10] characterized |
| [FEATURE ID: 11] sequence, block | number, group, length, set, value, plurality, signal | [FEATURE ID: 11] % interval occupancy, maximum number |
| [FEATURE ID: 12] sequences | messages, parameters, values, channels | [FEATURE ID: 12] occupancy signals |
| [FEATURE ID: 13] period, average power ratio | maximum, duration, mean, average, plurality, value, bandwidth | [FEATURE ID: 13] number |
| [FEATURE ID: 14] claim | step, claim of, cl claim, the claim, embodiment, paragraph, item | [FEATURE ID: 14] claim |
| 1 . In a multi-cell orthogonal frequency division multiple access [FEATURE ID: 1] ( OFDMA ) wireless communication system comprising [TRANSITIVE ID: 2] a plurality of base stations [FEATURE ID: 3] and mobile stations [FEATURE ID: 3] , a mobile station [FEATURE ID: 4] configured to communicate [TRANSITIVE ID: 3] with a serving [TRANSITIVE ID: 5] base station [FEATURE ID: 4] in a cell via a communication channel [FEATURE ID: 4] , the mobile station comprising : an apparatus [FEATURE ID: 6] configured to transmit a data signal [FEATURE ID: 7] to the serving base station in the cell over a data subchannel , wherein the data subchannel comprises a plurality of adjacent or non-adjacent subcarriers [FEATURE ID: 8] within the communication channel ; and an apparatus configured to transmit a ranging [TRANSITIVE ID: 7] signal [FEATURE ID: 9] to the serving base station in the cell over a ranging subchannel [FEATURE ID: 3] for random access [FEATURE ID: 7] , wherein : the ranging signal is formed [TRANSITIVE ID: 10] from a ranging sequence [FEATURE ID: 11] selected [TRANSITIVE ID: 10] from a set of ranging sequences [FEATURE ID: 12] associated [TRANSITIVE ID: 10] with the cell for identifying the mobile station ; the ranging signal lasts over a period [FEATURE ID: 13] of one or multiple orthogonal frequency division multiplexing ( OFDM ) symbols [FEATURE ID: 3] and the ranging signal exhibits a low peak - to - average power ratio [FEATURE ID: 13] in the time domain [FEATURE ID: 3] ; and the ranging subchannel comprises at least one block [FEATURE ID: 11] of subcarriers [FEATURE ID: 3] within the communication channel and power levels [FEATURE ID: 8] of subcarriers at both ends of a block are set to zero . 2 . The mobile station of claim [FEATURE ID: 14] 1 , wherein the subcarrier configuration of the ranging subchannel for the cell is different from subcarrier configurations of ranging subchannels [FEATURE ID: 7] for other cells [FEATURE ID: 3] |
1 . A method [FEATURE ID: 4] for variably delaying access requests [FEATURE ID: 7] over at least one access channel [FEATURE ID: 3] from each of a plurality of terminals [FEATURE ID: 3] to a shared [TRANSITIVE ID: 1] resource [FEATURE ID: 3] , origination of access requests at said [TRANSITIVE ID: 5] terminals being subject to a pseudo-random delay characterized [TRANSITIVE ID: 10] by a first parameter , the method comprising [TRANSITIVE ID: 2] generating one or more occupancy signals [FEATURE ID: 12] reflecting the relative occupancy of said access channels [FEATURE ID: 3] , based on said occupancy signals , generating an adjustment signal [FEATURE ID: 6] representing [TRANSITIVE ID: 2] a modification of said first parameter , and making said adjustment signal available [FEATURE ID: 7] to at least some of said terminals , wherein each of said channels [FEATURE ID: 3] is arranged to receive messages [FEATURE ID: 7] in sequential access slots [FEATURE ID: 8] , each of said slots [FEATURE ID: 8] comprising a plurality of frames [FEATURE ID: 8] , each of said messages comprising a message preamble [FEATURE ID: 7] and a message capsule [FEATURE ID: 7] , and said generating of said one or more occupancy signals reflecting the relative occupancy of said access channels comprises determining for each access channel the % interval occupancy [FEATURE ID: 11] in accordance with % Interval Occupancy =[ M × ( 4 + MAX CAP — SZ + PAM — SZ ) % , where M is the number [FEATURE ID: 13] of occupied access slots [FEATURE ID: 8] during a measurement interval [FEATURE ID: 7] , MAX CAP SZ is the maximum number [FEATURE ID: 11] of access channel frames [FEATURE ID: 8] in an Access Channel message capsule minus 3 , and PAM SZ is the number of frames in the Access Channel preamble minus [FEATURE ID: 9] 1 . 2 . The method of claim [FEATURE ID: 14] |
| Targeted Patent: Patent: US8467366B2 Filed: 2004-03-09 Issued: 2013-06-18 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 random access in multi-carrier communication systems | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US6526091B1 Filed: 1998-08-17 Issued: 2003-02-25 Patent Holder: (Original Assignee) Telefonaktiebolaget LM Ericsson AB (Current Assignee) Unwired Planet LLC Inventor(s): Johan Nyström, Branislav Popovic Title: Communication methods and apparatus based on orthogonal hadamard-based sequences having selected correlation properties |
| [FEATURE ID: 1] multi-cell orthogonal frequency division multiple access, base stations, mobile station, base station, cell, communication channel, transmit, time domain | mobile, radio, device, wireless, signal, network, transceiver | [FEATURE ID: 1] digital communication system |
| [FEATURE ID: 2] wireless communication system, apparatus | transceiver, device, system, radio, signal, station, channel | [FEATURE ID: 2] digital radio transmission system, transmitter, receiver |
| [TRANSITIVE ID: 3] comprising | implementing, incorporating, comprises, by, including, having, with | [TRANSITIVE ID: 3] comprising |
| [TRANSITIVE ID: 4] serving | receiving, first, reference, given | [TRANSITIVE ID: 4] received |
| [FEATURE ID: 5] data signal, ranging, random access | transmission, signaling, channel, symbol, synchronization, sequence, timing | [FEATURE ID: 5] frame, synchronization signal |
| [FEATURE ID: 6] adjacent, sets | different, separate, sequences, successive, distinct, identical, combinations | [FEATURE ID: 6] respective, distinct sequences |
| [FEATURE ID: 7] non-adjacent subcarriers, subcarriers, subchannels, other cells | symbols, elements, bits, samples, blocks, values, codes | [FEATURE ID: 7] signals, code groups, code words, steps, cyclic shifts, sequences, signs, versions, members, complex elements |
| [FEATURE ID: 8] signal | signature, code, sequence, channel, symbol, preamble, value | [FEATURE ID: 8] code group, signal, correlation, special sequence, time location |
| [TRANSITIVE ID: 9] formed, selected | generated, transmitted, received, provided, determined, modulated, defined | [TRANSITIVE ID: 9] scrambled, encoded |
| [FEATURE ID: 10] sequence, set, period, block | series, group, number, plurality, frame, pair, string | [FEATURE ID: 10] sequence, first set |
| [FEATURE ID: 11] sequences, power levels, subcarrier configurations | values, parameters, pairs, symbols, signals, signatures, each | [FEATURE ID: 11] identities, Hadamard sequences, correlations |
| [TRANSITIVE ID: 12] associated | designated, mapped, identified, allocated | [TRANSITIVE ID: 12] assigned |
| [FEATURE ID: 13] symbols | chips, signals, carriers, tones | [FEATURE ID: 13] codes |
| [FEATURE ID: 14] low peak | peak, mean, highest, max | [FEATURE ID: 14] maximal |
| [FEATURE ID: 15] claim | step, claimed, embodiment, paragraph, item, invention, aspect | [FEATURE ID: 15] claim |
| 1 . In a multi-cell orthogonal frequency division multiple access [FEATURE ID: 1] ( OFDMA ) wireless communication system [FEATURE ID: 2] comprising [TRANSITIVE ID: 3] a plurality of base stations [FEATURE ID: 1] and mobile stations , a mobile station [FEATURE ID: 1] configured to communicate with a serving [TRANSITIVE ID: 4] base station [FEATURE ID: 1] in a cell [FEATURE ID: 1] via a communication channel [FEATURE ID: 1] , the mobile station comprising : an apparatus [FEATURE ID: 2] configured to transmit [TRANSITIVE ID: 1] a data signal [FEATURE ID: 5] to the serving base station in the cell over a data subchannel , wherein the data subchannel comprises a plurality of adjacent [FEATURE ID: 6] or non-adjacent subcarriers [FEATURE ID: 7] within the communication channel ; and an apparatus configured to transmit a ranging [TRANSITIVE ID: 5] signal [FEATURE ID: 8] to the serving base station in the cell over a ranging subchannel for random access [FEATURE ID: 5] , wherein : the ranging signal is formed [TRANSITIVE ID: 9] from a ranging sequence [FEATURE ID: 10] selected [TRANSITIVE ID: 9] from a set [FEATURE ID: 10] of ranging sequences [FEATURE ID: 11] associated [TRANSITIVE ID: 12] with the cell for identifying the mobile station ; the ranging signal lasts over a period [FEATURE ID: 10] of one or multiple orthogonal frequency division multiplexing ( OFDM ) symbols [FEATURE ID: 13] and the ranging signal exhibits a low peak [FEATURE ID: 14] - to - average power ratio in the time domain [FEATURE ID: 1] ; and the ranging subchannel comprises at least one block [FEATURE ID: 10] of subcarriers [FEATURE ID: 7] within the communication channel and power levels [FEATURE ID: 11] of subcarriers at both ends of a block are set to zero . 2 . The mobile station of claim [FEATURE ID: 15] 1 , wherein the subcarrier configuration of the ranging subchannel for the cell is different from subcarrier configurations [FEATURE ID: 11] of ranging subchannels [FEATURE ID: 7] for other cells [FEATURE ID: 7] . 3 . The mobile station of claim 1 , wherein the set of ranging sequences for the cell is different from sets [FEATURE ID: 6] |
1 . A method of determining a scrambling code group [FEATURE ID: 8] for a received [TRANSITIVE ID: 4] signal [FEATURE ID: 8] in a digital communication system [FEATURE ID: 1] , in which signals [FEATURE ID: 7] are scrambled [TRANSITIVE ID: 9] by respective [FEATURE ID: 6] scrambling codes [FEATURE ID: 13] , the scrambling codes are assigned [TRANSITIVE ID: 12] to respective scrambling code groups [FEATURE ID: 7] , identities [FEATURE ID: 11] of the scrambling code groups are encoded [TRANSITIVE ID: 9] in the signals by respective code - word-wise cyclically distinct sequences [FEATURE ID: 6] of signed code words [FEATURE ID: 7] , the method comprising [TRANSITIVE ID: 3] the steps [FEATURE ID: 7] of : correlating the received signal to each of a plurality of the code words , wherein the code words are S - Hadamard sequences [FEATURE ID: 11] ; coherently combining the correlations [FEATURE ID: 11] in accordance with cyclic shifts [FEATURE ID: 7] of each of a plurality of sequences [FEATURE ID: 7] of signs [FEATURE ID: 7] ; and determining a maximal [FEATURE ID: 14] coherently combined correlation [FEATURE ID: 8] to identify the scrambling code group for the received signal . 2 . The method of claim [FEATURE ID: 15] 1 , wherein each sequence [FEATURE ID: 10] of signed code words corresponds to a frame [FEATURE ID: 5] of the received signal , and determining the maximal coherently combined correlation identifies a start of the frame . 3 . A method of determining a scrambling code group for a received signal in a digital communication system , in which signals are scrambled by respective scrambling codes , the scrambling codes are assigned to respective scrambling code groups , identities of the scrambling code groups are encoded in the signals by respective code - word-wise cyclically distinct sequences of code words , the method comprising the steps of : correlating the received signal to cyclic shifts of each of a plurality of sequences of code words , wherein the code words are S - Hadamard sequences ; combining the correlations for each of the plurality of sequences of code words ; and determining a maximal combined correlation to identify the scrambling code group for the received signal . 4 . The method of claim 3 , wherein each sequence of code words corresponds to a frame of the received signal , and determining the maximal combined correlation identifies a start of the frame . 5 . The method of claim 3 , wherein the correlations are coherently combined . 6 . The method of claim 3 , wherein the correlations are non-coherently combined . 7 . A digital radio transmission system [FEATURE ID: 2] having at least one transmitter [FEATURE ID: 2] and at least one receiver [FEATURE ID: 2] , comprising : means in the transmitter for generating a synchronization signal [FEATURE ID: 5] that includes signed versions [FEATURE ID: 7] of S - Hadamard sequences , wherein the S - Hadamard sequences correspond to members [FEATURE ID: 7] of a first set [FEATURE ID: 10] of Walsh - Hadamard sequences position-wise scrambled with a special sequence [FEATURE ID: 8] having complex elements [FEATURE ID: 7] of constant magnitude ; means in the receiver for estimating a time location [FEATURE ID: 8] |
| Targeted Patent: Patent: US8467366B2 Filed: 2004-03-09 Issued: 2013-06-18 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 random access in multi-carrier communication systems | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US6519449B1 Filed: 1999-10-29 Issued: 2003-02-11 Patent Holder: (Original Assignee) Nortel Networks Ltd (Current Assignee) Apple Inc Inventor(s): Genzao G. Zhang, Kuang-Tsan Wu, Jiandong Zhuang, Pei Hou, Shiwei Gao, Harvey H. Lee Title: Method and apparatus for a signal power control in a wireless communication system |
| [FEATURE ID: 1] multi-cell orthogonal frequency division multiple access | distributed, duplex, slotted, synchronous, hybrid, spread, mobile | [FEATURE ID: 1] TDMA, division multiple access |
| [FEATURE ID: 2] wireless communication system, apparatus, time domain, subcarrier configuration | system, device, architecture, transceiver, arrangement, configuration, structure | [FEATURE ID: 2] wireless communications network, receiver dynamic range, unit |
| [TRANSITIVE ID: 3] comprising, comprises | including, of, by, include, has, over, providing | [TRANSITIVE ID: 3] having, comprising |
| [FEATURE ID: 4] base stations | transceiver, network, channel, base, second, mobile, radio | [FEATURE ID: 4] second station, first |
| [FEATURE ID: 5] mobile station, ranging | terminal, transceiver, receiver, channel, base, handset, data | [FEATURE ID: 5] signal, first station, receiver dynamic range position, base transceiver station, customer premises equipment |
| [TRANSITIVE ID: 6] configured, selected, associated | assigned, provided, specified, allocated, intended, determined, programmed | [TRANSITIVE ID: 6] set |
| [TRANSITIVE ID: 7] serving, low peak, different | designated, known, first, specific, variable, selected, given | [TRANSITIVE ID: 7] particular, defined |
| [FEATURE ID: 8] base station | base, bt, transceiver, station, transceiver station | [FEATURE ID: 8] BTS |
| [FEATURE ID: 9] communication channel, random access | communication, relay, feedback, link, transmission, handover, channel | [FEATURE ID: 9] signal power control, first control loop |
| [TRANSITIVE ID: 10] transmit | output, signal, emit, transmission, receive, send, tx | [TRANSITIVE ID: 10] operate, transmit |
| [FEATURE ID: 11] data signal | request, report, communication, pilot, response, channel | [FEATURE ID: 11] second control loop internal |
| [FEATURE ID: 12] signal | frame, tone, signals, code, pulse, radio signal, channel signal | [FEATURE ID: 12] time, control power signal |
| [TRANSITIVE ID: 13] formed | issued, originating, emitted, provided, sent | [TRANSITIVE ID: 13] transmitted |
| [FEATURE ID: 14] sequence, set, average power ratio, block, sets | value, series, plurality, group, subset, range, pair | [FEATURE ID: 14] power, number |
| [FEATURE ID: 15] period | window, cycle, range, span | [FEATURE ID: 15] term |
| [FEATURE ID: 16] subcarriers, power levels | energy, symbols, bits, samples, pilots, estimates, values | [FEATURE ID: 16] signal power samples |
| [FEATURE ID: 17] claim | step, embodiment, item, invention, statement, figure, clair | [FEATURE ID: 17] claim |
| 1 . In a multi-cell orthogonal frequency division multiple access [FEATURE ID: 1] ( OFDMA ) wireless communication system [FEATURE ID: 2] comprising [TRANSITIVE ID: 3] a plurality of base stations [FEATURE ID: 4] and mobile stations , a mobile station [FEATURE ID: 5] configured [TRANSITIVE ID: 6] to communicate with a serving [TRANSITIVE ID: 7] base station [FEATURE ID: 8] in a cell via a communication channel [FEATURE ID: 9] , the mobile station comprising : an apparatus [FEATURE ID: 2] configured to transmit [TRANSITIVE ID: 10] a data signal [FEATURE ID: 11] to the serving base station in the cell over a data subchannel , wherein the data subchannel comprises [TRANSITIVE ID: 3] a plurality of adjacent or non-adjacent subcarriers within the communication channel ; and an apparatus configured to transmit a ranging [TRANSITIVE ID: 5] signal [FEATURE ID: 12] to the serving base station in the cell over a ranging subchannel for random access [FEATURE ID: 9] , wherein : the ranging signal is formed [TRANSITIVE ID: 13] from a ranging sequence [FEATURE ID: 14] selected [TRANSITIVE ID: 6] from a set [FEATURE ID: 14] of ranging sequences associated [TRANSITIVE ID: 6] with the cell for identifying the mobile station ; the ranging signal lasts over a period [FEATURE ID: 15] of one or multiple orthogonal frequency division multiplexing ( OFDM ) symbols and the ranging signal exhibits a low peak [FEATURE ID: 7] - to - average power ratio [FEATURE ID: 14] in the time domain [FEATURE ID: 2] ; and the ranging subchannel comprises at least one block [FEATURE ID: 14] of subcarriers [FEATURE ID: 16] within the communication channel and power levels [FEATURE ID: 16] of subcarriers at both ends of a block are set to zero . 2 . The mobile station of claim [FEATURE ID: 17] 1 , wherein the subcarrier configuration [FEATURE ID: 2] of the ranging subchannel for the cell is different [FEATURE ID: 7] from subcarrier configurations of ranging subchannels for other cells . 3 . The mobile station of claim 1 , wherein the set of ranging sequences for the cell is different from sets [FEATURE ID: 14] |
1 . A method of providing a signal power control [FEATURE ID: 9] in a TDMA [FEATURE ID: 1] ( time [FEATURE ID: 12] - division multiple access [FEATURE ID: 1] ) wireless communications network [FEATURE ID: 2] for a signal [FEATURE ID: 5] transmitted [TRANSITIVE ID: 13] from a first station [FEATURE ID: 5] set [TRANSITIVE ID: 6] to operate [TRANSITIVE ID: 10] at a particular [FEATURE ID: 7] transmit [TRANSITIVE ID: 10] power [FEATURE ID: 14] to a second station [FEATURE ID: 4] having [TRANSITIVE ID: 3] a defined [TRANSITIVE ID: 7] receiver dynamic range [FEATURE ID: 2] , the method comprising [TRANSITIVE ID: 3] : receiving in the second station the signal ; sampling the received signal in the second station upon receipt of the received signal and prior to any demodulation of the received signal to produce signal power samples [FEATURE ID: 16] ; estimating in the second station a received signal power based on the signal power samples ; producing in the second station a control power signal [FEATURE ID: 12] based on the received signal power estimated ; transmitting the control power signal from the second station to the first station ; adjusting in the first station the transmit power based on the control power signal transmitted ; and shifting in the second station the receiver dynamic range based on the received signal power estimated for maintaining the signal received within the receiver dynamic range . 2 . The method of claim [FEATURE ID: 17] 1 wherein estimating in the second station a received signal power based on the signal power samples comprises : short - term [FEATURE ID: 15] averaging the signal power samples to produce a short - term average of the received signal power ; and long - term averaging the signal power samples to produce a long - term average of the received signal power . 3 . The method of claim 2 wherein short - term averaging the signal power samples to produce a short - term average of the received signal power is done for a predetermined number [FEATURE ID: 14] of signal power samples defining a short - term averaging window . 4 . The method of claim 2 wherein long - term averaging the signal power samples to produce a long - term average of the received signal power is done for a predetermined number of signal power samples defining a long - term averaging window . 5 . The method of claim 2 wherein producing in the second station a control power signal based on the received signal power estimated comprises calculating in the second station a transmit power offset based on the short - term average and the long - term average of the received signal power estimated . 6 . The method of claim 5 wherein adjusting in the first station the transmit power based on the control power signal transmitted comprises summing in the first station the transmit power offset with a previously calculated transmit power setting . 7 . The method of claim 2 wherein shifting in the second station the receiver dynamic range based on the received signal power estimated comprises : calculating in the second station an optimized receiver dynamic range based on the long - term average ; and shifting the receiver dynamic range position [FEATURE ID: 5] to the optimized receiver dynamic range calculated . 8 . The method of claim 7 wherein a first control loop [FEATURE ID: 9] formed of the first [FEATURE ID: 4] and second station is used for adjusting in the first station the transmit power based on the control power signal transmitted and wherein a second control loop internal [FEATURE ID: 11] to the second station is used for adjusting in the second station a receiver dynamic range based on the received signal power estimated . 9 . The method of claim 8 wherein the second station is a base transceiver station [FEATURE ID: 5] ( BTS [FEATURE ID: 8] ) , the first station is a customer premises equipment [FEATURE ID: 5] ( CPE ) unit [FEATURE ID: 2] |
| Targeted Patent: Patent: US8467366B2 Filed: 2004-03-09 Issued: 2013-06-18 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 random access in multi-carrier communication systems | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US6480525B1 Filed: 1999-11-29 Issued: 2002-11-12 Patent Holder: (Original Assignee) Golden Bridge Technology Inc (Current Assignee) Google LLC Inventor(s): Kourosh Parsa, Emmanuel Kanterakis Title: Second level collision resolution for packet data communications |
| [FEATURE ID: 1] multi-cell orthogonal frequency division multiple access, subcarriers | wireless, spread, synchronous, td, radio, division, packet | [FEATURE ID: 1] code, multiple |
| [FEATURE ID: 2] OFDMA | rim, mim access, for ma, das, access | [FEATURE ID: 2] CDMA |
| [FEATURE ID: 3] wireless communication system, subcarrier configuration | architecture, configuration, arrangement, structure, device, environment, wireless network | [FEATURE ID: 3] system |
| [TRANSITIVE ID: 4] comprising | utilizing, using, providing, by, featuring, for, of | [TRANSITIVE ID: 4] employing, comprising |
| [FEATURE ID: 5] base stations, mobile stations | base, stations, bs, mobile, channels, users, transmitters | [FEATURE ID: 5] base stations, base station, mobile stations, mobile station |
| [FEATURE ID: 6] mobile station | system, transmitter, transceiver, base station, processor, terminal, station | [FEATURE ID: 6] radio network controller, method, detectable power level |
| [FEATURE ID: 7] base station | station, mobile station, base, subscriber station, reference mobile, plurality ms, second | [FEATURE ID: 7] first mobile station, second mobile station |
| [FEATURE ID: 8] communication channel | signal, transmitter, frequency, receiver | [FEATURE ID: 8] spectrum transmitter |
| [FEATURE ID: 9] data signal, signal, sequence | request, symbol, signature, message, frame, packet, transmission | [FEATURE ID: 9] access, access preamble |
| [FEATURE ID: 10] adjacent | identical, single, similar, fixed, different, same, common | [FEATURE ID: 10] spread, said |
| [FEATURE ID: 11] non-adjacent subcarriers, sequences, symbols, power levels, subcarrier configurations, subchannels, other cells | signals, slots, codes, frequencies, carriers, blocks, cells | [FEATURE ID: 11] channels, groups, CPCH channels, preambles |
| [FEATURE ID: 12] random access | acquisition, authentication, demodulation, transmission | [FEATURE ID: 12] receipt |
| [TRANSITIVE ID: 13] selected | one, derived, designated, provided, elected, different, specified | [TRANSITIVE ID: 13] selected |
| [FEATURE ID: 14] set, period, block, sets | series, plurality, subset, range, sequence, combination, collection | [FEATURE ID: 14] group |
| [TRANSITIVE ID: 15] associated | unique, mapped, assigned, allocated, common | [TRANSITIVE ID: 15] corresponding |
| [FEATURE ID: 16] low peak, time domain | frequency, bandwidth, peak, communication, spectral, symbol, burst | [FEATURE ID: 16] spectrum modulation |
| [FEATURE ID: 17] least | only, lease, lea nt, lest, 15 least, last, most | [FEATURE ID: 17] least |
| 1 . In a multi-cell orthogonal frequency division multiple access [FEATURE ID: 1] ( OFDMA [FEATURE ID: 2] ) wireless communication system [FEATURE ID: 3] comprising [TRANSITIVE ID: 4] a plurality of base stations [FEATURE ID: 5] and mobile stations [FEATURE ID: 5] , a mobile station [FEATURE ID: 6] configured to communicate with a serving base station [FEATURE ID: 7] in a cell via a communication channel [FEATURE ID: 8] , the mobile station comprising : an apparatus configured to transmit a data signal [FEATURE ID: 9] to the serving base station in the cell over a data subchannel , wherein the data subchannel comprises a plurality of adjacent [FEATURE ID: 10] or non-adjacent subcarriers [FEATURE ID: 11] within the communication channel ; and an apparatus configured to transmit a ranging signal [FEATURE ID: 9] to the serving base station in the cell over a ranging subchannel for random access [FEATURE ID: 12] , wherein : the ranging signal is formed from a ranging sequence [FEATURE ID: 9] selected [TRANSITIVE ID: 13] from a set [FEATURE ID: 14] of ranging sequences [FEATURE ID: 11] associated [TRANSITIVE ID: 15] with the cell for identifying the mobile station ; the ranging signal lasts over a period [FEATURE ID: 14] of one or multiple orthogonal frequency division multiplexing ( OFDM ) symbols [FEATURE ID: 11] and the ranging signal exhibits a low peak [FEATURE ID: 16] - to - average power ratio in the time domain [FEATURE ID: 16] ; and the ranging subchannel comprises at least [FEATURE ID: 17] one block [FEATURE ID: 14] of subcarriers [FEATURE ID: 1] within the communication channel and power levels [FEATURE ID: 11] of subcarriers at both ends of a block are set to zero . 2 . The mobile station of claim 1 , wherein the subcarrier configuration [FEATURE ID: 3] of the ranging subchannel for the cell is different from subcarrier configurations [FEATURE ID: 11] of ranging subchannels [FEATURE ID: 11] for other cells [FEATURE ID: 11] . 3 . The mobile station of claim 1 , wherein the set of ranging sequences for the cell is different from sets [FEATURE ID: 14] |
1 . In a code [FEATURE ID: 1] - division - multiple [FEATURE ID: 1] - access [FEATURE ID: 9] ( CDMA [FEATURE ID: 2] ) system [FEATURE ID: 3] employing [TRANSITIVE ID: 4] spread [FEATURE ID: 10] - spectrum modulation [FEATURE ID: 16] comprising [TRANSITIVE ID: 4] a radio network controller [FEATURE ID: 6] , a plurality of base stations [FEATURE ID: 5] , each base station [FEATURE ID: 5] ( BS ) comprising a BS - spread - spectrum transmitter [FEATURE ID: 8] and a BS - spread - spectrum receiver , and a plurality of mobile stations [FEATURE ID: 5] , each mobile station [FEATURE ID: 5] ( MS ) comprising an MS - spread - spectrum transmitter and an MS - spread - spectrum receiver , a method [FEATURE ID: 6] comprising the steps of : transmitting from an MS - spread - spectrum transmitter of a first mobile station [FEATURE ID: 7] at least [FEATURE ID: 17] one access preamble [FEATURE ID: 9] comprising an access preamble signature corresponding [TRANSITIVE ID: 15] to a group [FEATURE ID: 14] of common packet channel ( CPCH ) channels [FEATURE ID: 11] selected [TRANSITIVE ID: 13] from a plurality of groups [FEATURE ID: 11] of CPCH channels [FEATURE ID: 11] ; transmitting from an MS - spread - spectrum transmitter of a second mobile station [FEATURE ID: 7] at least one access preamble comprising said [TRANSITIVE ID: 10] access preamble signature ; receiving at the BS spread - spectrum receiver of one of the base stations at least one of the access preambles [TRANSITIVE ID: 11] at a detectable - power level ; responsive to receipt [FEATURE ID: 12] of the at least one access preamble at the detectable power level [FEATURE ID: 6] |
| Targeted Patent: Patent: US8467366B2 Filed: 2004-03-09 Issued: 2013-06-18 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 random access in multi-carrier communication systems | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US20020159537A1 Filed: 2001-04-27 Issued: 2002-10-31 Patent Holder: (Original Assignee) Vivato Inc (Current Assignee) XR Communications LLC Inventor(s): William Crilly Title: Multipath communication methods and apparatuses |
| [TRANSITIVE ID: 1] comprising | for, providing, comprises, featuring, by, encompassing, of | [TRANSITIVE ID: 1] comprising |
| [FEATURE ID: 2] base stations, cell | network, wireless, transceiver, sector, cellular, radio, mobile | [FEATURE ID: 2] reverse transmission path, wireless communication system |
| [FEATURE ID: 3] mobile station, base station, time domain | system, terminal, transceiver, device, receiver, network, transmitter | [FEATURE ID: 3] reverse path data signal, first device, base station device, antenna, second device |
| [TRANSITIVE ID: 4] configured | programmed, equipped, disposed, structured, implemented, adapted, operable | [TRANSITIVE ID: 4] configurable |
| [FEATURE ID: 5] communication channel, transmit | signal, channel, uplink, receiver, carrier, communication, transmission | [FEATURE ID: 5] forward path data signal, transmission path |
| [FEATURE ID: 6] data signal | symbol, packet, traffic, burst, transmission, stream, information | [FEATURE ID: 6] data, path data signal |
| [FEATURE ID: 7] adjacent | different, orthogonal, proximate, equal, identical | [FEATURE ID: 7] reciprocal |
| [FEATURE ID: 8] non-adjacent subcarriers, symbols, subcarriers, subchannels | tones, channels, cells, signals, blocks, carriers, bits | [FEATURE ID: 8] different types, modulation values |
| [TRANSITIVE ID: 9] ranging | training, control, first, transmission, reference | [TRANSITIVE ID: 9] forward path data |
| [FEATURE ID: 10] signal | transmission, information, signature, sequence, channel, preamble, code | [FEATURE ID: 10] training data |
| [FEATURE ID: 11] random access | transmission, communication, reuse, reception, access | [FEATURE ID: 11] use |
| [TRANSITIVE ID: 12] formed | generated, modulated, resulting, determined, transmitted, obtained | [TRANSITIVE ID: 12] modified |
| [FEATURE ID: 13] sequence | signal, value, parameter, waveform, vector | [FEATURE ID: 13] channel response |
| [FEATURE ID: 14] set | list, table, library, pair, plurality, subset, series | [FEATURE ID: 14] group, local version |
| [FEATURE ID: 15] sequences | signals, parameters, values, channels, symbols | [FEATURE ID: 15] sub-carrier pre-equalized OFDM data |
| [FEATURE ID: 16] period, low peak, average power ratio, block | bandwidth, value, distance, set, minimum, portion, threshold | [FEATURE ID: 16] type, multipath transmission delay spread, guard interval |
| [FEATURE ID: 17] least | only, minus, most, lease, at least, 15 least, than | [FEATURE ID: 17] least |
| [FEATURE ID: 18] power levels | signals, values, symbols, pilots, coefficients, estimates, components | [FEATURE ID: 18] pre-equalized OFDM data |
| [FEATURE ID: 19] claim | step, requirement, the claim, embodiment, item, statement, aspect | [FEATURE ID: 19] claim |
| 1 . In a multi-cell orthogonal frequency division multiple access ( OFDMA ) wireless communication system comprising [TRANSITIVE ID: 1] a plurality of base stations [FEATURE ID: 2] and mobile stations , a mobile station [FEATURE ID: 3] configured [TRANSITIVE ID: 4] to communicate with a serving base station [FEATURE ID: 3] in a cell [FEATURE ID: 2] via a communication channel [FEATURE ID: 5] , the mobile station comprising : an apparatus configured to transmit [TRANSITIVE ID: 5] a data signal [FEATURE ID: 6] to the serving base station in the cell over a data subchannel , wherein the data subchannel comprises a plurality of adjacent [FEATURE ID: 7] or non-adjacent subcarriers [FEATURE ID: 8] within the communication channel ; and an apparatus configured to transmit a ranging [TRANSITIVE ID: 9] signal [FEATURE ID: 10] to the serving base station in the cell over a ranging subchannel for random access [FEATURE ID: 11] , wherein : the ranging signal is formed [TRANSITIVE ID: 12] from a ranging sequence [FEATURE ID: 13] selected from a set [FEATURE ID: 14] of ranging sequences [FEATURE ID: 15] associated with the cell for identifying the mobile station ; the ranging signal lasts over a period [FEATURE ID: 16] of one or multiple orthogonal frequency division multiplexing ( OFDM ) symbols [FEATURE ID: 8] and the ranging signal exhibits a low peak [FEATURE ID: 16] - to - average power ratio [FEATURE ID: 16] in the time domain [FEATURE ID: 3] ; and the ranging subchannel comprises at least [FEATURE ID: 17] one block [FEATURE ID: 16] of subcarriers [FEATURE ID: 8] within the communication channel and power levels [FEATURE ID: 18] of subcarriers at both ends of a block are set to zero . 2 . The mobile station of claim [FEATURE ID: 19] 1 , wherein the subcarrier configuration of the ranging subchannel for the cell is different from subcarrier configurations of ranging subchannels [FEATURE ID: 8] |
1 . A method comprising [TRANSITIVE ID: 1] : identifying at least one multipath transmission delay within a reverse path data signal [FEATURE ID: 3] ; determining at least one forward path pre-equalization parameter based on said at least one transmission delay ; and modifying a forward path data signal [FEATURE ID: 5] based on said at least one forward path pre-equalization parameter . 2 . The method as recited in claim [FEATURE ID: 19] 1 , further comprising : receiving said reverse path data signal over at least one reverse transmission path [FEATURE ID: 2] . 3 . The method as recited in claim 2 , further comprising : transmitting said modified [TRANSITIVE ID: 12] forward path data signal over at least one forward transmission path [FEATURE ID: 5] . 4 . The method as recited in claim 1 , wherein said reverse path data signal includes at least [FEATURE ID: 17] one type [FEATURE ID: 16] of data [FEATURE ID: 6] selected from a group [FEATURE ID: 14] of different types [FEATURE ID: 8] of data comprising Orthogonal Frequency Division Multiplexing ( OFDM ) data and Quadrature Phase Shift Keying ( QPSK ) data . 5 . The method as recited in claim 1 , wherein said modified forward path data signal includes at least one type of data selected from a group of different types of data comprising Orthogonal Frequency Division Multiplexing ( OFDM ) data and Quadrature Phase Shift Keying ( QPSK ) data . 6 . The method as recited in claim 5 , wherein said modified forward path data signal includes sub-carrier pre-equalized OFDM data [FEATURE ID: 18] . 7 . The method as recited in claim 6 , further comprising : generating corresponding Quadrature Phase Shift Keying ( QPSK ) modulation values [FEATURE ID: 8] based on said sub-carrier pre-equalized OFDM data [FEATURE ID: 15] . 8 . The method as recited in claim 4 , wherein identifying said at least one multipath transmission delay includes : identifying at least one multipath transmission delay spread [FEATURE ID: 16] that is greater than a guard interval [FEATURE ID: 16] . 9 . The method as recited in claim 1 , wherein said reverse path data signal includes identifiable training data . 10 . The method as recited in claim 9 , further comprising : comparing said received identifiable training data to a local version [FEATURE ID: 14] of said training data [FEATURE ID: 10] to identify said at least one multipath transmission delay within said reverse path data signal . 11 . The method as recited in claim 3 , wherein modifying said forward path data signal based on at least one forward path pre-equalization parameter further includes : selectively inverting and applying a measured channel response [FEATURE ID: 13] to said forward path data [FEATURE ID: 9] signal to significantly reduce subsequent induced deleterious channel response changes to said modified forward path data signal during transmission over said at least one forward transmission path . 12 . The method as recited in claim 3 , wherein said at least one reverse transmission path is substantially reciprocal [FEATURE ID: 7] to said at least one forward transmission path . 13 . The method as recited in claim 1 , wherein identifying said at least one multipath transmission delay , determining said at least one forward path pre-equalization parameter , and modifying said forward path data signal are performed by a first device [FEATURE ID: 3] . 14 . The method as recited in claim 13 , wherein said first device includes a base station device [FEATURE ID: 3] that is operatively configurable [FEATURE ID: 4] for use [FEATURE ID: 11] in a wireless communication system [FEATURE ID: 2] . 15 . The method as recited in claim 13 , further comprising : using at least one first device receive antenna [FEATURE ID: 3] operatively coupled to said first device to receive said reverse path data signal [FEATURE ID: 6] over at least one reverse transmission path from a second device [FEATURE ID: 3] |
| Targeted Patent: Patent: US8467366B2 Filed: 2004-03-09 Issued: 2013-06-18 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 random access in multi-carrier communication systems | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US20020154705A1 Filed: 2000-03-22 Issued: 2002-10-24 Patent Holder: (Original Assignee) Qualcomm Inc (Current Assignee) Qualcomm Inc Inventor(s): Jay Walton, Mark Wallace, Ahmad Jalali Title: High efficiency high performance communications system employing multi-carrier modulation |
| [FEATURE ID: 1] multi-cell orthogonal frequency division multiple access | digital, broadcast, radio, uplink, wireless | [FEATURE ID: 1] transmitted |
| [FEATURE ID: 2] wireless communication system, base station, subcarrier configuration | device, structure, cell, network, configuration, transmitter, node | [FEATURE ID: 2] transmitter unit, communications system configurable |
| [TRANSITIVE ID: 3] comprising | incorporating, comprises, featuring, by, including, having, with | [TRANSITIVE ID: 3] comprising |
| [FEATURE ID: 4] base stations | transmitters, carriers, channels, beams, antennas | [FEATURE ID: 4] modulation symbol vector streams |
| [FEATURE ID: 5] mobile station, apparatus | transmitter, device, transceiver, unit, means, receiver, channel | [FEATURE ID: 5] system data processor operative, system data processor |
| [TRANSITIVE ID: 6] configured, associated | operable, adapted, provided, designed, arranged, used, implemented | [TRANSITIVE ID: 6] coupled, modulator operative, antenna operative, channel data processor operative, encoder operative, operative |
| [FEATURE ID: 7] communication channel | symbol, transmitter, carrier, channel, sector, signal, beam | [FEATURE ID: 7] antenna, modulation symbol vector, modulator, respective channel data processor |
| [TRANSITIVE ID: 8] transmit | output, channel, map, uplink, encode, modulate, signal | [TRANSITIVE ID: 8] input data stream, process |
| [FEATURE ID: 9] data signal, sequences, period, symbols, subchannels, other cells | sequence, transmission, channel, payload, symbol, packet, vector | [FEATURE ID: 9] signals, modulation symbol vector stream, data, respective modulation symbol vector stream, signal, respective channel data stream, data stream |
| [TRANSITIVE ID: 10] comprises | provides, encompasses, identifies, indicates, including, forms, defines | [TRANSITIVE ID: 10] comprises |
| [FEATURE ID: 11] non-adjacent subcarriers, power levels | segments, signals, components, bits, portions, groups, symbols | [FEATURE ID: 11] channel data streams, modulation symbol vectors representative, modulation symbols, symbol sub-streams |
| [FEATURE ID: 12] signal, time domain | sequence, code, channel, transmission, number, frame, burst | [FEATURE ID: 12] frequency, manner, stream |
| [TRANSITIVE ID: 13] formed | modulated, mapped, provided, configured, transmitted, determined, encoded | [TRANSITIVE ID: 13] generated |
| [FEATURE ID: 14] sequence, block | number, group, frame, train, pattern, packet, string | [FEATURE ID: 14] sequence |
| [FEATURE ID: 15] set | selection, collection, subset, pair, variety, range | [FEATURE ID: 15] combination |
| [FEATURE ID: 16] least | only, minus, most, east, last, lease, lest | [FEATURE ID: 16] least |
| [FEATURE ID: 17] subcarriers | space, bandwidth, power, time, frequency | [FEATURE ID: 17] temporal diversity |
| [FEATURE ID: 18] claim | statement, pop claim, paragraph, item, invention, aspect, feature | [FEATURE ID: 18] claim |
| 1 . In a multi-cell orthogonal frequency division multiple access [FEATURE ID: 1] ( OFDMA ) wireless communication system [FEATURE ID: 2] comprising [TRANSITIVE ID: 3] a plurality of base stations [FEATURE ID: 4] and mobile stations , a mobile station [FEATURE ID: 5] configured [TRANSITIVE ID: 6] to communicate with a serving base station [FEATURE ID: 2] in a cell via a communication channel [FEATURE ID: 7] , the mobile station comprising : an apparatus [FEATURE ID: 5] configured to transmit [TRANSITIVE ID: 8] a data signal [FEATURE ID: 9] to the serving base station in the cell over a data subchannel , wherein the data subchannel comprises [TRANSITIVE ID: 10] a plurality of adjacent or non-adjacent subcarriers [FEATURE ID: 11] within the communication channel ; and an apparatus configured to transmit a ranging signal [FEATURE ID: 12] to the serving base station in the cell over a ranging subchannel for random access , wherein : the ranging signal is formed [TRANSITIVE ID: 13] from a ranging sequence [FEATURE ID: 14] selected from a set [FEATURE ID: 15] of ranging sequences [FEATURE ID: 9] associated [TRANSITIVE ID: 6] with the cell for identifying the mobile station ; the ranging signal lasts over a period [FEATURE ID: 9] of one or multiple orthogonal frequency division multiplexing ( OFDM ) symbols [FEATURE ID: 9] and the ranging signal exhibits a low peak - to - average power ratio in the time domain [FEATURE ID: 12] ; and the ranging subchannel comprises at least [FEATURE ID: 16] one block [FEATURE ID: 14] of subcarriers [FEATURE ID: 17] within the communication channel and power levels [FEATURE ID: 11] of subcarriers at both ends of a block are set to zero . 2 . The mobile station of claim [FEATURE ID: 18] 1 , wherein the subcarrier configuration [FEATURE ID: 2] of the ranging subchannel for the cell is different from subcarrier configurations of ranging subchannels [FEATURE ID: 9] for other cells [FEATURE ID: 9] |
1 . A transmitter unit [FEATURE ID: 2] in a communications system configurable [FEATURE ID: 2] to provide antenna [FEATURE ID: 7] , frequency [FEATURE ID: 12] , or temporal diversity [FEATURE ID: 17] , or a combination [FEATURE ID: 15] thereof , for transmitted [TRANSITIVE ID: 1] signals [FEATURE ID: 9] , comprising [TRANSITIVE ID: 3] : a system data processor operative [FEATURE ID: 5] to receive and partition an input data stream [FEATURE ID: 8] into a plurality of channel data streams [FEATURE ID: 11] and to process [TRANSITIVE ID: 8] the plurality of channel data streams to generate one or more modulation symbol vector streams [FEATURE ID: 4] , wherein each modulation symbol vector stream [FEATURE ID: 9] comprises [TRANSITIVE ID: 10] a sequence [FEATURE ID: 14] of modulation symbol vectors representative [FEATURE ID: 11] of the data [FEATURE ID: 9] in one or more channel data streams , and wherein each modulation symbol vector [FEATURE ID: 7] comprises a plurality of modulation symbols [FEATURE ID: 11] and is generated [TRANSITIVE ID: 13] and transmitted in a manner [FEATURE ID: 12] to provide antenna , frequency , or temporal diversity , or a combination thereof ; at least one modulator [FEATURE ID: 7] coupled [TRANSITIVE ID: 6] to the system data processor [FEATURE ID: 5] , the at least one modulator operative [FEATURE ID: 6] to receive and modulate a respective modulation symbol vector stream [FEATURE ID: 9] to provide a modulated signal [FEATURE ID: 9] ; and at least one antenna coupled to the at least one modulator , the at least one antenna operative [FEATURE ID: 6] to receive and transmit a respective modulated signal . 2 . The transmitter unit of claim [FEATURE ID: 18] 1 , wherein the system data processor includes at least [FEATURE ID: 16] one channel data processor , each channel data processor operative [FEATURE ID: 6] to receive and process a respective channel data stream [FEATURE ID: 9] to generate a stream [FEATURE ID: 12] of modulation symbols . 3 . The transmitter unit of claim 2 , wherein the system data processor further includes at least one encoder , each encoder operative [FEATURE ID: 6] to receive and encode a respective channel data stream to generate an encoded data stream [FEATURE ID: 9] , and wherein each channel data processor is operative [FEATURE ID: 6] to receive and process a respective encoded data stream . 4 . The transmitter unit of claim 2 , wherein the system data processor further includes at least one demultiplexer , each demultiplexer coupled to a respective channel data processor [FEATURE ID: 7] and operative to receive and demultiplex the stream of modulation symbols into one or more symbol sub-streams [FEATURE ID: 11] |
| Targeted Patent: Patent: US8467366B2 Filed: 2004-03-09 Issued: 2013-06-18 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 random access in multi-carrier communication systems | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US6442152B1 Filed: 1998-07-13 Issued: 2002-08-27 Patent Holder: (Original Assignee) Samsung Electronics Co Ltd (Current Assignee) Samsung Electronics Co Ltd Inventor(s): Su-Won Park, Jin-Soo Park, Soon-Young Yoon, Jae-Min Ahn, Young-Ky Kim, Doo-Gyun Kim Title: Device and method for communicating packet data in mobile communication system |
| [FEATURE ID: 1] multi-cell orthogonal frequency division multiple access, ranging, random access | relay, transmission, wireless, signaling, uplink, tracking, positioning | [FEATURE ID: 1] transmitting |
| [FEATURE ID: 2] wireless communication system, cell | system, ran, call, sector, mobile, network, station | [FEATURE ID: 2] mobile communication system |
| [TRANSITIVE ID: 3] comprising | implementing, incorporating, comprises, by, encompassing, including, having | [TRANSITIVE ID: 3] comprising |
| [FEATURE ID: 4] base stations | transceiver, mobile, bs, network | [FEATURE ID: 4] base station |
| [FEATURE ID: 5] mobile station, base station, period, block | unit, receiver, processor, controller, multiplexer, transceiver, scrambler | [FEATURE ID: 5] device, common channel data generator, specific mobile station, selector, long code generator, mixer, data generator, transmitter, mobile station, spreader, pilot channel transmitter, common channel message, call origination |
| [TRANSITIVE ID: 6] configured | used, programmed, assigned, designed, provided | [TRANSITIVE ID: 6] designated |
| [TRANSITIVE ID: 7] serving | designated, first, specific, single, corresponding, given | [TRANSITIVE ID: 7] selected |
| [FEATURE ID: 8] communication channel | preamble, signal, frequency, carrier, call, channel, slot | [FEATURE ID: 8] reverse common channel, common PN code, reverse pilot channel signal |
| [FEATURE ID: 9] apparatus | arrangement, exciter, oscillator, amplifier, interface, adder, emitter | [FEATURE ID: 9] orthogonal modulator |
| [TRANSITIVE ID: 10] transmit | uplink, transport, output, broadcast, transfer | [TRANSITIVE ID: 10] transmission |
| [FEATURE ID: 11] data signal, non-adjacent subcarriers, sequences, time domain, subcarriers, subchannels | signals, data, symbol, cells, symbols, channel, transmission | [FEATURE ID: 11] common channel data frame, frame data, output, pilot channel signal, dedicated channel |
| [FEATURE ID: 12] signal, symbols, low peak | symbol, frame, code, signals, channel, packet, bandwidth | [FEATURE ID: 12] mixer output, frequency |
| [TRANSITIVE ID: 13] formed | generated, modulated, processed, distributed, scrambled, mapped, emitted | [TRANSITIVE ID: 13] transmitted, spread |
| [FEATURE ID: 14] sequence | signal, value, length, pattern | [FEATURE ID: 14] long code mask |
| [TRANSITIVE ID: 15] selected | provided, included, defined, received | [TRANSITIVE ID: 15] generated |
| [TRANSITIVE ID: 16] associated | shared, designated, assigned, unique, allocated, exclusive, available | [TRANSITIVE ID: 16] dedicated, dedicated |
| [FEATURE ID: 17] claim | paragraph, previous claim, embodiment, invention, item, clam, aspect | [FEATURE ID: 17] claim |
| 1 . In a multi-cell orthogonal frequency division multiple access [FEATURE ID: 1] ( OFDMA ) wireless communication system [FEATURE ID: 2] comprising [TRANSITIVE ID: 3] a plurality of base stations [FEATURE ID: 4] and mobile stations , a mobile station [FEATURE ID: 5] configured [TRANSITIVE ID: 6] to communicate with a serving [TRANSITIVE ID: 7] base station [FEATURE ID: 5] in a cell [FEATURE ID: 2] via a communication channel [FEATURE ID: 8] , the mobile station comprising : an apparatus [FEATURE ID: 9] configured to transmit [TRANSITIVE ID: 10] a data signal [FEATURE ID: 11] to the serving base station in the cell over a data subchannel , wherein the data subchannel comprises a plurality of adjacent or non-adjacent subcarriers [FEATURE ID: 11] within the communication channel ; and an apparatus configured to transmit a ranging [TRANSITIVE ID: 1] signal [FEATURE ID: 12] to the serving base station in the cell over a ranging subchannel for random access [FEATURE ID: 1] , wherein : the ranging signal is formed [TRANSITIVE ID: 13] from a ranging sequence [FEATURE ID: 14] selected [TRANSITIVE ID: 15] from a set of ranging sequences [FEATURE ID: 11] associated [TRANSITIVE ID: 16] with the cell for identifying the mobile station ; the ranging signal lasts over a period [FEATURE ID: 5] of one or multiple orthogonal frequency division multiplexing ( OFDM ) symbols [FEATURE ID: 12] and the ranging signal exhibits a low peak [FEATURE ID: 12] - to - average power ratio in the time domain [FEATURE ID: 11] ; and the ranging subchannel comprises at least one block [FEATURE ID: 5] of subcarriers [FEATURE ID: 11] within the communication channel and power levels of subcarriers at both ends of a block are set to zero . 2 . The mobile station of claim [FEATURE ID: 17] 1 , wherein the subcarrier configuration of the ranging subchannel for the cell is different from subcarrier configurations of ranging subchannels [FEATURE ID: 11] |
1 . A transmitting [TRANSITIVE ID: 1] device [FEATURE ID: 5] for a base station [FEATURE ID: 4] in a mobile communication system [FEATURE ID: 2] , comprising [TRANSITIVE ID: 3] : a common channel data generator [FEATURE ID: 5] for generating a common channel data frame [FEATURE ID: 11] to be transmitted [TRANSITIVE ID: 13] ; a first mask for generating a first long code for a forward common channel ; a second mask for generating a second long code for a forward common channel to be designated [TRANSITIVE ID: 6] as dedicated [TRANSITIVE ID: 16] to a specific mobile station [FEATURE ID: 5] ; a selector [FEATURE ID: 5] for selecting one of the first and second long code masks generated [TRANSITIVE ID: 15] in the first and second mask ; a long code generator [FEATURE ID: 5] for generating a long code with the selected [TRANSITIVE ID: 7] long code mask [FEATURE ID: 14] from the selector ; a mixer [FEATURE ID: 5] for mixing the frame data [FEATURE ID: 11] received from the data generator [FEATURE ID: 5] and the long code received from the long code generator ; and a transmitter [FEATURE ID: 5] for spreading a mixer output [FEATURE ID: 12] for transmission [FEATURE ID: 10] . 2 . A transmitting device for a mobile station [FEATURE ID: 5] in a mobile communication system , comprising : an orthogonal modulator [FEATURE ID: 9] for orthogonally modulating frame data to be transmitted ; a first mask for generating a first long code for a reverse common channel [FEATURE ID: 8] ; a second mask for generating a second long code for a reverse common channel to be designated as dedicated [FEATURE ID: 16] ; a selector for selecting one of the first and second long code masks in the first and second mask ; a long code generator for generating a long code with the selected long code mask ; a mixer for producing a spreading code by mixing a common PN code [FEATURE ID: 8] with the generated long code ; a spreader [FEATURE ID: 5] for multiplying the orthogonally modulated frame data by the spreading code ; and a transmitter for upconverting the frequency [FEATURE ID: 12] of the output [FEATURE ID: 11] of the spreader , for transmission . 3 . The transmitting device of claim [FEATURE ID: 17] 2 , further comprising : a pilot channel transmitter [FEATURE ID: 5] for spreading a reverse pilot channel signal [FEATURE ID: 8] to be transmitted simultaneously with the common channel message [FEATURE ID: 5] by the spreading code and continuously transmitting the spread [FEATURE ID: 13] reverse pilot channel signal [FEATURE ID: 11] ; and wherein said reverse common channel is designated upon a call origination [FEATURE ID: 5] in a dedicated channel [FEATURE ID: 11] |
| Targeted Patent: Patent: US8467366B2 Filed: 2004-03-09 Issued: 2013-06-18 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 random access in multi-carrier communication systems | Cross Reference / Shared Meaning between the Lines |
Charted Against: Patent: US6424618B1 Filed: 1996-11-07 Issued: 2002-07-23 Patent Holder: (Original Assignee) Matsushita Electric Industrial Co Ltd (Current Assignee) Panasonic Holdings Corp ; Panasonic Intellectual Property Corp of America Inventor(s): Mitsuru Uesugi, Taku Nagase, Osamu Kato Title: Code generating method and code selecting method |
| [FEATURE ID: 1] multi-cell orthogonal frequency division multiple access, base station, cell, time domain | network, system, mobile, cells, spectrum, transmitter, station | [FEATURE ID: 1] CDMA communication |
| [FEATURE ID: 2] wireless communication system, subchannel | system, transceiver, apparatus, device, radio, transmitter, cell | [FEATURE ID: 2] order, user, base station apparatus, mobile station apparatus, communication system |
| [TRANSITIVE ID: 3] comprising | containing, with, including, of, implementing, involving, using | [TRANSITIVE ID: 3] comprising, having |
| [FEATURE ID: 4] base stations, mobile stations, power levels, other cells | sectors, channels, beams, stations, carriers, subscribers, terminals | [FEATURE ID: 4] users |
| [FEATURE ID: 5] mobile station | receiver, device, controller, means, transmitter, processor, unit | [FEATURE ID: 5] method, respective orthogonal code, code generator, spreader, apparatus, correlation value calculator |
| [TRANSITIVE ID: 6] serving | first, single, designated, corresponding, respective, given | [TRANSITIVE ID: 6] specific |
| [FEATURE ID: 7] communication channel, ranging, random access | registration, transmission, synchronization, relay, communication, positioning, signaling | [FEATURE ID: 7] code, CDMA wireless communication |
| [FEATURE ID: 8] apparatus | indicator, oscillator, array, adder | [FEATURE ID: 8] unused first orthogonal code |
| [TRANSITIVE ID: 9] transmit | output, emit, provide, receive | [TRANSITIVE ID: 9] generate |
| [FEATURE ID: 10] data signal, signal, set, period, block | sequence, packet, burst, channel, frame, number, symbol | [FEATURE ID: 10] certain second orthogonal code |
| [FEATURE ID: 11] adjacent, different | identical, unique, same, orthogonal, independent, common, parallel | [FEATURE ID: 11] orthogonalized |
| [FEATURE ID: 12] non-adjacent subcarriers, sequences, symbols, subcarriers, subchannels | cells, signals, channels, resources, slots, tones, carriers | [FEATURE ID: 12] codes, data |
| [TRANSITIVE ID: 13] formed, associated | provided, defined, transmitted, shared, assigned, usable, mapped | [TRANSITIVE ID: 13] used |
| [FEATURE ID: 14] sequence | number, parameter, pattern, element, value | [FEATURE ID: 14] factor |
| [TRANSITIVE ID: 15] selected | allocated, obtained, provided, included, assigned | [TRANSITIVE ID: 15] available |
| [FEATURE ID: 16] low peak | maximal, highest, constant, minimum | [FEATURE ID: 16] minimal |
| [FEATURE ID: 17] claim | step, requirement, invention, paragraph, item, clam, aspect | [FEATURE ID: 17] claim |
| 1 . In a multi-cell orthogonal frequency division multiple access [FEATURE ID: 1] ( OFDMA ) wireless communication system [FEATURE ID: 2] comprising [TRANSITIVE ID: 3] a plurality of base stations [FEATURE ID: 4] and mobile stations [FEATURE ID: 4] , a mobile station [FEATURE ID: 5] configured to communicate with a serving [TRANSITIVE ID: 6] base station [FEATURE ID: 1] in a cell [FEATURE ID: 1] via a communication channel [FEATURE ID: 7] , the mobile station comprising : an apparatus [FEATURE ID: 8] configured to transmit [TRANSITIVE ID: 9] a data signal [FEATURE ID: 10] to the serving base station in the cell over a data subchannel , wherein the data subchannel comprises a plurality of adjacent [FEATURE ID: 11] or non-adjacent subcarriers [FEATURE ID: 12] within the communication channel ; and an apparatus configured to transmit a ranging [TRANSITIVE ID: 7] signal [FEATURE ID: 10] to the serving base station in the cell over a ranging subchannel [FEATURE ID: 2] for random access [FEATURE ID: 7] , wherein : the ranging signal is formed [TRANSITIVE ID: 13] from a ranging sequence [FEATURE ID: 14] selected [TRANSITIVE ID: 15] from a set [FEATURE ID: 10] of ranging sequences [FEATURE ID: 12] associated [TRANSITIVE ID: 13] with the cell for identifying the mobile station ; the ranging signal lasts over a period [FEATURE ID: 10] of one or multiple orthogonal frequency division multiplexing ( OFDM ) symbols [FEATURE ID: 12] and the ranging signal exhibits a low peak [FEATURE ID: 16] - to - average power ratio in the time domain [FEATURE ID: 1] ; and the ranging subchannel comprises at least one block [FEATURE ID: 10] of subcarriers [FEATURE ID: 12] within the communication channel and power levels [FEATURE ID: 4] of subcarriers at both ends of a block are set to zero . 2 . The mobile station of claim [FEATURE ID: 17] 1 , wherein the subcarrier configuration of the ranging subchannel for the cell is different [FEATURE ID: 11] from subcarrier configurations of ranging subchannels [FEATURE ID: 12] for other cells [FEATURE ID: 4] |
1 . A method [FEATURE ID: 5] for generating spreading codes [FEATURE ID: 12] used [TRANSITIVE ID: 13] in a CDMA communication [FEATURE ID: 1] , comprising [TRANSITIVE ID: 3] : preparing a plurality of first orthogonal codes , orthogonalized [TRANSITIVE ID: 11] to each other , each having [TRANSITIVE ID: 3] a specific [FEATURE ID: 6] spreading factor [FEATURE ID: 14] ; and combining each first orthogonal code , of the plurality of first orthogonal codes , and its polarity inverted orthogonal code to generate [TRANSITIVE ID: 9] a plurality of second orthogonal codes , orthogonalized to each other and to the first orthogonal codes , each second orthogonal code , of the plurality of second orthogonal codes , having a spreading factor larger than a specific spreading factor of an associated first orthogonal code . 2 . The method of claim [FEATURE ID: 17] 1 , wherein an unused first orthogonal code [FEATURE ID: 8] is combined with its polarity inverted orthogonal code to generate a certain second orthogonal code [FEATURE ID: 10] . 3 . A method for selecting a spreading code [FEATURE ID: 7] used in a CDMA communication , comprising : preparing a plurality of first orthogonal codes , orthogonalized to each other , each first orthogonal code , of the plurality of orthogonal codes , having a specific spreading factor ; combining each first orthogonal code and its polarity inverted orthogonal code to generate a plurality of second orthogonal codes , orthogonalized to each other and to the first orthogonal codes , each second orthogonal code , of the plurality of second orthogonal codes , having a spreading factor larger than a specific spreading factor of an associated first orthogonal code ; and assigning the first orthogonal codes and the second orthogonal codes to users [FEATURE ID: 4] in an order [FEATURE ID: 2] in which an orthogonal code of a predetermined spreading factor is assigned to a user [FEATURE ID: 2] using an orthogonal code of the predetermined spreading factor . 4 . The method of claim 3 , wherein said orthogonal code of a predetermined spreading factor comprises an orthogonal code having a minimal [FEATURE ID: 16] spreading factor . 5 . The method of claim 3 , further comprising : examining whether an orthogonal code of a spreading factor desired by a user to be assigned an orthogonal code is available [FEATURE ID: 15] ; and arranging the first plurality of orthogonal codes and the second plurality of orthogonal codes when the desired orthogonal spreading factor is not available . 6 . A method for selecting a spreading code used in a CDMA communication , comprising : preparing a plurality of first orthogonal codes , orthogonalized to each other , each first orthogonal code , of the plurality of first orthogonal codes , having a specific spreading factor ; combining each first orthogonal code and its polarity inverted orthogonal code to generate a plurality of second orthogonal codes , orthogonalized to each other and to the first orthogonal codes , each second orthogonal code , of the plurality of second orthogonal codes , having a spreading factor larger than a specific spreading factor of an associated first orthogonal code ; calculating a time dependence value in correlation of each first orthogonal code and each second orthogonal code ; and selecting an orthogonal code having a predetermined calculated time dependence value in correlation . 7 . The method of claim 6 , further comprising : assigning the plurality of first orthogonal codes and the plurality of second orthogonal codes in a predetermined order in which an orthogonal code having a spreading factor that is smaller than a spreading factor of a respective orthogonal code [FEATURE ID: 5] is assigned to a user . 8 . A base station apparatus [FEATURE ID: 2] used in a CDMA communication , comprising : a code generator [FEATURE ID: 5] that generates a plurality of first orthogonal codes , orthogonalized to each other , each first orthogonal code , of said plurality of first orthogonal codes , having a specific spreading factor , said code generator combining each first orthogonal code and its polarity inverted orthogonal code to generate a plurality of second orthogonal codes , orthogonalized to each other and to said plurality of first orthogonal codes , each second orthogonal code , of said plurality of second orthogonal codes , having a spreading factor that is larger than a specific spreading factor of an associated first orthogonal code ; and a spreader [FEATURE ID: 5] that spreads data [FEATURE ID: 12] using said plurality of first orthogonal codes and said plurality of second orthogonal codes . 9 . The apparatus [FEATURE ID: 5] of claim 8 , further comprising : an administer that administers said plurality of first orthogonal codes and said plurality of second orthogonal codes used by users communicating with said base station apparatus . 10 . The apparatus of claim 8 , further comprising : an assigner that assigns said plurality of first orthogonal codes and said plurality of second orthogonal codes to users in an order in which an orthogonal code having a spreading factor that is smaller than a spreading factor of a respective orthogonal code is assigned to a user . 11 . The apparatus of claim 8 , further comprising : a correlation value calculator [FEATURE ID: 5] that calculates a time dependence value in correlation of each of said plurality of first orthogonal codes and said plurality of second orthogonal codes . 12 . The apparatus of claim 11 , further comprising : an assigner that assigns said plurality of first orthogonal codes and said plurality of second orthogonal codes to users in an order in which an orthogonal code with a time dependence value smaller in correlation to another orthogonal code is assigned to a user . 13 . The apparatus of claim 8 , wherein a mobile station apparatus [FEATURE ID: 2] performs a CDMA wireless communication [FEATURE ID: 7] with said base station apparatus . 14 . A communication system [FEATURE ID: 2] |