ClassID:

224835

H04L1/1692 - CPC Classification

Classification description:

Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals; Details of the supervisory signal Physical properties of the supervisory signal, e.g. acknowledgement by energy bursts

Recent Application in this class:
#1
20250365096
2025-11-27

MANAGING ACKNOWLEDGMENT (ACK) TO NEGATIVE ACK (A2N) ERRORS

#2
20250096945
2025-03-20

TWO PART HYBRID AUTOMATIC REPEAT REQUEST ACKNOWLEDGEMENT (HARQ-ACK) FOR COMPRESSING A HARQ-ACK PAYLOAD

#3
20250039909
2025-01-30

PHYSICAL SIDELINK FEEDBACK CHANNEL PADDING

#4
20240396669
2024-11-28

METHODS AND PROCEDURES FOR SUBCARRIER SPACING FOR DOWNLINK SHARED CHANNEL TRANSMISSION

#5
20240322981
2024-09-26

FEEDBACK INFORMATION PROCESSING METHOD, DEVICE AND SYSTEM

#6
20240305410
2024-09-12

A DATA PACKET TRANSACTION TIMING SOLUTION FOR A WIRELESS COMMUNICATION SYSTEM

#7
20240235666
2024-07-11

GHOST BEAMS IN A SATELLITE COMMUNICATION SYSTEM

#8
20240040569
2024-02-01

METHOD FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEMS

#9
20240023116
2024-01-18

COMMUNICATION SYSTEM

#10
20240014940
2024-01-11

Methods and procedures for transmitting a transport block over multiple time units in an uplink shared channel

#11
20230073645
2023-03-09

ACKNOWLEDGMENT REPORTING FOR MULTI-LINK TRANSMISSIONS

#12
20230056476
2023-02-23

LOW-LATENCY FORWARD ERROR CORRECTION FOR HIGH-SPEED SERIAL LINKS

#13
20220393797
2022-12-08

Low latency ACK/NACK transmission

#14
20220303057
2022-09-22

Methods and procedures for subcarrier spacing for downlink shared channel transmission

#15
20220295475
2022-09-15

Terminal device, base station device, transmitting method and receiving method

#16
20220103249
2022-03-31

LOW DATA VOLUME SATELLITE COMMUNICATION SYSTEM

#17
20220052823
2022-02-17

Feedback information processing method, device and system

#18
20220045796
2022-02-10

Low latency ACK/NACK transmission

#19
20220014283
2022-01-13

ENERGY DETECTION INDICATOR

#20
20210410159
2021-12-30

Terminal and communication method to provide communication services

#21
20210360699
2021-11-18

LBT parameters for uplink in unlicensed spectrum

#22
20210264122
2021-08-26

Efficient decoding of RFID tags based on relevant RN16 selection

#23
20210160847
2021-05-27

Method for transmitting control information in wireless communication systems

#24
20210143968
2021-05-13

Method for transmitting control information in wireless communication system and apparatus therefor

#25
20210143903
2021-05-13

Low data volume satellite communication system

#26
20210120534
2021-04-22

Communication system

#27
20210076331
2021-03-11

Network-controlled power control on side-link communications

#28
20210021364
2021-01-21

Message Rearrangement for Improved Wireless Code Performance

#29
20200403733
2020-12-24

Contention window size adaptation

#30
20200359237
2020-11-12

Apparatus and method for feeding back data receiving status

#31
20200305136
2020-09-24

Communication system

#32
20200287662
2020-09-10

Information processing device, communication system, information processing method, and program

#33
20200280419
2020-09-03

Method for transmitting control information in wireless communication system and apparatus therefor

#34
20200275435
2020-08-27

Terminal device, base station device, transmitting method and receiving method

#35
20200244403
2020-07-30

Contention window size adjustment for wideband operation in new radio—unlicensed

#36
20200213995
2020-07-02

Method and apparatus for transmitting channel state information in wireless access system supporting machine type communication

#37
20200205135
2020-06-25

Communication system

#38
20200205101
2020-06-25

Coordinated synchronization channel transmission and restricted measurement

#39
20200204305
2020-06-25

Methods and procedures for search space configuration

#40
20200145990
2020-05-07

Method and apparatus for transmitting uplink control information in wireless communication system

#41
20200145988
2020-05-07

Method and apparatus for transmitting uplink control information in wireless communication system

#42
20200120688
2020-04-16

Terminal and communication method to provide communication services

#43
20200119808
2020-04-16

Low data volume satellite communication system

#44
20200112418
2020-04-09

Method for transmitting control information in wireless communication system and apparatus therefor

#45
20200084765
2020-03-12

Terminal device and transmission method

#46
20200014520
2020-01-09

Feedback information processing method, device and system

#47
20190312684
2019-10-10

Methods and apparatuses for group transmissions

#48
20190305888
2019-10-03

Low-latency forward error correction for high-speed serial links

#49
20190274160
2019-09-05

Efficient signaling over access channel

#50
20190268899
2019-08-29

Method and apparatus for controlling uplink control information in wireless communication system

#51
20190258555
2019-08-22

Read technique for a bus interface system

#52
20190254065
2019-08-15

Efficient signaling over access channel

#53
20190253955
2019-08-15

Discovery procedure signaling

#54
20190246392
2019-08-08

Terminal device, base station device, transmitting method and receiving method

#55
20190215825
2019-07-11

Terminal device and transmission method

#56
20190200342
2019-06-27

Method and apparatus for transmitting channel state information in wireless access system supporting machine type communication

#57
20190191456
2019-06-20

MBMS and PMCH in unlicensed bands

#58
20190173573
2019-06-06

Low data volume satellite communication system

#59
20190159190
2019-05-23

Method for transmitting control information in wireless communication systems

#60
20190158253
2019-05-23

Method for transmitting control information in wireless communication system and apparatus therefor

#61
20190150196
2019-05-16

LBT parameters for uplink in unlicensed spectrum

#62
20190132091
2019-05-02

Method to decrease bluetooth power consumption for periodic traffic profiles

#63
20190104504
2019-04-04

Communication system

#64
20190097779
2019-03-28

UPLINK CONTROL INFORMATION SCHEDULING METHOD AND WIRELESS COMMUNICATIONS APPARATUS

#65
20190082437
2019-03-14

Method and apparatus for controlling uplink control information in wireless communication system

#66
20190053217
2019-02-14

Uplink control channel design for high reliability transmission in mobile communications

#67
20190044663
2019-02-07

Repetition process cycling for grant-less or grant-based transmission

#68
20190037610
2019-01-31

User equipment and method for resource allocation

#69
20180337762
2018-11-22

Method for transmitting control information in wireless communication system and apparatus therefor

#70
20180316464
2018-11-01

Methods and procedures for narrowband LTE operation

#71
20180279302
2018-09-27

Terminal device and transmission method

#72
20180278376
2018-09-27

Methods, apparatuses and user equipment for hybrid automatic repeat request transmission

#73
20180254858
2018-09-06

Contention window size adaptation

#74
20180249354
2018-08-30

Apparatus and method for feeding back data receiving status

#75
20180242260
2018-08-23

Method and apparatus for transmitting control information in a wireless communication system

#76
20180220473
2018-08-02

Method and apparatus for transmitting reception confirmation response of user equipment in wireless communication system

#77
20180213493
2018-07-26

Coordinated synchronization channel transmission and restricted measurement

#78
20180199370
2018-07-12

Data transmission on a contention based physical data channel

#79
20180167934
2018-06-14

Method and apparatus for transmitting uplink control information in wireless communication system

#80
20180167170
2018-06-14

Methods and apparatuses for performing hybrid automatic retransmission request in wireless access system supporting machine-type communication

#81
20180146472
2018-05-24

Method and apparatus for transmitting uplink control information in a wireless communication system

#82
20180139026
2018-05-17

Acknowledgement transmission method and apparatus in wireless communication system

#83
20180124821
2018-05-03

Efficient signaling over access channel

#84
20180124779
2018-05-03

Method and apparatus for controlling uplink control information in wireless communication system

#85
20180103467
2018-04-12

Method and apparatus for transmitting uplink control information in wireless communication system

#86
20180084457
2018-03-22

Method and device for sending and controlling feedback information

#87
20180062816
2018-03-01

Transmission diversity and multiplexing for HARQ-ACK signals in communication systems

#88
20180062792
2018-03-01

Information processing device, communication system, information processing method, and program

#89
20180049187
2018-02-15

Terminal device, base station device, transmitting method and receiving method

#90
20180041318
2018-02-08

Terminal apparatus, radio communication system and communication method

#91
20180020488
2018-01-18

User equipment and method for resource allocation

#92
20180014163
2018-01-11

Feedback signaling for multicast data transmission

#93
20170373814
2017-12-28

Method for transmitting control information in wireless communication system and apparatus therefor

#94
20170303284
2017-10-19

Feedback method and device

#95
20170303270
2017-10-19

Terminal device and transmission method

#96
20170288809
2017-10-05

Efficient signaling over access channel

#97
20170257830
2017-09-07

Method and apparatus for transmitting control information in a wireless communication system

#98
20170223684
2017-08-03

Communication system

#99
20170207894
2017-07-20

Narrow band ACK / NACK transmissions

#100
20170188350
2017-06-29

Method and apparatus for transmitting channel state information in wireless access system supporting machine type communication

#101
20170181152
2017-06-22

Method for transmitting control information in wireless communication systems

#102
20170094676
2017-03-30

Terminal and communication method to provide communication services

#103
20170085341
2017-03-23

Apparatus and method for transmitting and receiving signal in communication system

#104
20170070332
2017-03-09

Method for transmitting control information in wireless communication system and apparatus therefor

#105
20170070270
2017-03-09

Wireless communication apparatus, wireless communication system, and wireless communication method

#106
20160381677
2016-12-29

Terminal device, base station device, transmitting method and receiving method

#107
20160373903
2016-12-22

Method and apparatus for managing group communications

#108
20160359588
2016-12-08

Method and system for aggregating messages

#109
20160353388
2016-12-01

Method and apparatus for transmitting control information in a wireless communication system

#110
20160337064
2016-11-17

Method and apparatus for transmitting and receiving signals in wireless communication system

#111
20160301510
2016-10-13

Method and apparatus for transmitting reception confirmation in wireless system

#112
20160242047
2016-08-18

Apparatus and method for feeding back data receiving status

#113
20160233715
2016-08-11

Method for performing wireless charging control of an electronic device with aid of variant slot timing and simple response indicating acknowledgement, and associated apparatus

#114
20160227587
2016-08-04

User equipment and method for resource allocation

#115
20160173257
2016-06-16

Method of transmitting sounding reference signal in wireless communication system

#116
20160156449
2016-06-02

Method for allocating physical hybrid automatic repeat request indicator channel

#117
20160105270
2016-04-14

Method and apparatus for transmitting ACK/NACK in a TDD-based wireless communication system

#118
20160073396
2016-03-10

Method and apparatus for transmitting uplink control information in wireless communication system

#119
20160057777
2016-02-25

Efficient signaling over access channel

#120
20160044691
2016-02-11

Multiplexing of control and data with varying power offsets in a SC-FDMA system

#121
20160014745
2016-01-14

Resource indexing for acknowledgement signals in response to receptions of multiple assignments

#122
20160014744
2016-01-14

Resource indexing for acknowledgement signals in response to receptions of multiple assignments

#123
20160014743
2016-01-14

Resource indexing for acknowledgement signals in response to receptions of multiple assignments

#124
20160014742
2016-01-14

Resource indexing for acknowledgement signals in response to receptions of multiple assignments

#125
20160014741
2016-01-14

Resource indexing for acknowledgement signals in response to receptions of multiple assignments

#126
20150282031
2015-10-01

Apparatus and method of transmitting and receiving data in soft handoff of a wireless communication system

#127
20150271795
2015-09-24

Terminal device, base station device, transmitting method and receiving method

#128
20150263828
2015-09-17

Management of ARQ detection threshold in communication networks

#129
20150230238
2015-08-13

Method and apparatus for transmitting uplink control information in a wireless communication system

#130
20150207548
2015-07-23

Method and apparatus for managing group communications

#131
20150193298
2015-07-09

Write technique for a bus interface system

#132
20150193297
2015-07-09

Read technique for a bus interface system

#133
20150139174
2015-05-21

Method and apparatus for transmitting control information in a wireless communication system

#134
20150098340
2015-04-09

Terminal device and transmission method

#135
20150092715
2015-04-02

Method and apparatus for transmitting reception confirmation in wireless system

#136
20150078322
2015-03-19

Method for transmitting control information in wireless communication system and apparatus therefor

#137
20150078320
2015-03-19

Method for transmitting control information in wireless communication system and apparatus therefor

#138
20150074481
2015-03-12

Fractional HARQ re-transmission

#139
20150029882
2015-01-29

Method and terminal for detecting PHICH in wireless access system

#140
20150023312
2015-01-22

Method of receiving uplink control signals identified by cyclic shift values in wireless communication system

#141
20150023185
2015-01-22

Method and apparatus for use of a relay schemed to facilitate efficient broadcast communication in device to device environment

#142
20150016398
2015-01-15

Terminal device, base station device, transmitting method and receiving method

#143
20150016388
2015-01-15

Method of transmitting sounding reference signal in wireless communication system

#144
20140376424
2014-12-25

Method and apparatus for transmitting uplink control information in wireless communication system

#145
20140369399
2014-12-18

Transmission method, transmission device, transmission program, and transmission system

#146
20140362707
2014-12-11

Selecting between normal and virtual dual layer ACK/NACK

#147
20140355553
2014-12-04

Method and arrangement in a telecommunication system

#148
20140355552
2014-12-04

Method and arrangement in a telecommunication system

#149
20140355551
2014-12-04

Method and arrangement in a telecommunication system

#150
20140334505
2014-11-13

Transmission of acknowledgment of short duration

#151
20140325295
2014-10-30

Communication circuit, physical quantity measurement device, electronic apparatus, moving object, and communication method

#152
20140321293
2014-10-30

Method and apparatus for performing retransmission operation in device to device communication system

#153
20140301311
2014-10-09

Multiplexing of control and data with varying power offsets in a SC-FDMA system

#154
20140233534
2014-08-21

Message rearrangement for improved wireless code performance

#155
20140233517
2014-08-21

Method and apparatus for transmitting uplink control information in wireless communication system

#156
20140233506
2014-08-21

Transmission diversity and multiplexing for HARQ-ACK signals in communication systems

#157
20140226608
2014-08-14

Method and apparatus for transmitting uplink control information in wireless communication system

#158
20140219372
2014-08-07

Arrangement and method for improving HARQ feedback in telecommunication systems

#159
20140219217
2014-08-07

Scrambling and modulation to constrain the constellation size of ACK/NAK transmission on the data channel

#160
20140219207
2014-08-07

Method for allocating physical hybrid automatic repeat request indicator channel

#161
20140198710
2014-07-17

Feedback signalling for multicast data transmission

#162
20140185590
2014-07-03

Radio communication device and radio communication method

#163
20140119249
2014-05-01

Method and apparatus for transmitting and receiving signals in wireless communication system

#164
20140115344
2014-04-24

Apparatus and method for operating and switching a single conductor interface

#165
20140112294
2014-04-24

Fractional HARQ re-transmission

#166
20140078955
2014-03-20

Data transmission via a relay station with ACK/NACK feedback

#167
20140056231
2014-02-27

Method and system for wirelessly transmitting data

#168
20140016600
2014-01-16

Method and apparatus for transmitting uplink control information in a wireless communication system

#169
20140010193
2014-01-09

Resource indexing for acknowledgement signals in response to receptions of multiple assignments

#170
20130322356
2013-12-05

Method for allocating physical hybrid automatic repeat request indicator channel

#171
20130315176
2013-11-28

Feedback information relating to a mobile communications system using carrier aggregation

#172
20130315165
2013-11-28

Radio communication system, base station apparatus, mobile station apparatus, and radio communication method

#173
20130308593
2013-11-21

User terminal, radio base station apparatus and radio communication method

#174
20130286996
2013-10-31

Radio base station apparatus and control information detection method

#175
20130286948
2013-10-31

Uplink power control method, power control parameter configuration method and apparatus thereof

#176
20130250901
2013-09-26

Terminal device, base station device, transmitting method and receiving method

#177
20130250814
2013-09-26

Apparatus and method for network controlling in wireless communication system

#178
20130242822
2013-09-19

Method and apparatus for transmitting ACK/NACK in a TDD-based wireless communication system

#179
20130235854
2013-09-12

Apparatus and method for feeding back data receiving status

#180
20130215807
2013-08-22

Method and apparatus for transmitting control information

#181
20130188535
2013-07-25

Method and apparatus for transmitting reception confirmation in wireless system

#182
20130163557
2013-06-27

Method for transmitting control information in wireless communication systems

#183
20130163546
2013-06-27

Selecting between normal and virtual dual layer ACK/NACK

#184
20130148631
2013-06-13

Apparatus and method of transmitting and receiving data in soft handoff of a wireless communication system

#185
20130148612
2013-06-13

Method of transmitting control signal in wireless communication system

#186
20130128854
2013-05-23

Mobile station device, communication system, communication method, integrated circuit, and circuit device

#187
20130121302
2013-05-16

Method and device for transmitting control information

#188
20130114575
2013-05-09

METHOD FOR TRANSMITTING HARQ-ACK FEEDBACK INFORMATION

#189
20130114501
2013-05-09

Mobile terminal apparatus and radio communication method

#190
20130114479
2013-05-09

Method and apparatus for transmitting reception confirmation response of user equipment in wireless communication system

#191
20130107868
2013-05-02

Mitigating impact of power imbalance on remote data rate in wireless local area network

#192
20130064209
2013-03-14

Support of UL ACK/NACK feedback for carrier aggregation during timing uncertainty component carrier (re-) configuration/activation/de-activation period

#193
20130044593
2013-02-21

Management of ARQ detection threshold in communication networks

#194
20130028243
2013-01-31

FACILITATING CHANNEL SOUNDING FOR MULTIPLE INPUT AND MULTIPLE OUTPUT (MIMO) TRANSMISSIONS

#195
20120320826
2012-12-20

Method and apparatus for transmitting uplink control information in a wireless communication system

#196
20120243486
2012-09-27

Method and apparatus for managing group communications

#197
20120236773
2012-09-20

Transmission of ACK/NACK bits and their embedding in the CQI reference signal

#198
20120230234
2012-09-13

Communication apparatus, communication system, and communication method

#199
20120218943
2012-08-30

Control resource mapping for a wireless communication system

#200
20120188926
2012-07-26

METHOD AND APPARATUS FOR FEEDING BACK ACK/NACK INFORMATION

#201
20120176988
2012-07-12

COMMUNICATION SYSTEM

#202
20120170524
2012-07-05

Allocation of acknowledgement channels to channel groups having variable transmit energies

#203
20120170479
2012-07-05

Allocation of acknowledgement channels to channel groups having fixed transmit energies

#204
20120163330
2012-06-28

COMMUNICATION SYSTEM

#205
20120163159
2012-06-28

Interference randomization for uplink signaling

#206
20120155354
2012-06-21

Wireless communication apparatus and response control method

#207
20120155337
2012-06-21

Method and apparatus for transmitting and receiving signals in wireless communication system

#208
20120140728
2012-06-07

Terminal device and signal transmission control method

#209
20120140703
2012-06-07

Relay station and method of relay station transmitting backhaul uplink signal

#210
20120099545
2012-04-26

Method and apparatus for transmitting control information in wireless communication system

#211
20120087437
2012-04-12

Message rearrangement for improved wireless code performance

#212
20120083284
2012-04-05

Orthogonal resource selection transmit diversity and resource assignment

#213
20120039342
2012-02-16

ARRANGEMENT AND METHOD FOR IMPROVING HARQ FEEDBACK IN TELECOMMUNICATION SYSTEMS

#214
20120039276
2012-02-16

METHOD AND APPARATUS FOR HARQ FEEDBACK TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM

#215
20120026985
2012-02-02

Method and apparatus for grant loss detection and related processing in a wireless communication network

#216
20120020241
2012-01-26

HARQ indicator determination

#217
20120008585
2012-01-12

Method for transmitting control information in wireless communication system and apparatus therefor

#218
20120008545
2012-01-12

WIRELESS COMMUNICATION SYSTEM AND DATA TRANSMISSION METHOD THEREOF

#219
20110305224
2011-12-15

METHOD AND SYSTEM FOR ADAPTIVE DOWNLINK SIGNALING DETECTION USING DYNAMIC DOWNLINK SIGNALING POWER DISTRIBUTION PROFILES

#220
20110305179
2011-12-15

Peer-to-peer communication with symmetric waveform for downlink and uplink

#221
20110286436
2011-11-24

Radio communication system, base station apparatus, mobile station apparatus, and radio communication method

#222
20110280171
2011-11-17

Uplink control channel transit power control based on received transmission

#223
20110274023
2011-11-10

Error propagation protection in non-binary multiple ACK/NACKS

#224
20110273999
2011-11-10

Data transmission via a relay station with ACK/NACK feedback

#225
20110268059
2011-11-03

Apparatus and method for feeding back data receiving status

#226
20110256862
2011-10-20

Description method for optimizing exchanges of information on acknowledgement in asynchronous communication between terminal and network

#227
20110206030
2011-08-25

Radio communication device and radio communication method

#228
20110205994
2011-08-25

Method and apparatus for data transmission using a plurality of resources in a multiple antenna system

#229
20110182328
2011-07-28

Radio communication device and response signal diffusion method

#230
20110165906
2011-07-07

Resource indexing for acknowledgement signals in response to receptions of multiple assignments

#231
20110149762
2011-06-23

Method and system for detecting enhanced relative grants in a wireless communications system

#232
20110142075
2011-06-16

Control channel signaling for multiple ACK/NACK assignments

#233
20110110244
2011-05-12

Method and system for detecting enhanced relative grants in a wireless communications system

#234
20110103334
2011-05-05

Method for allocating physical hybrid automatic repeat request indicator channel

#235
20110096928
2011-04-28

Wireless Communication Base Station Device, Wireless Communication Mobile Station Device, and Method for Scrambling Response Signal in ARQ

#236
20110096693
2011-04-28

Method and arrangement in a telecommunication system

#237
20110090825
2011-04-21

Transmission diversity and multiplexing for HARQ-ACK signals in communication systems

#238
20110069631
2011-03-24

Technique for radio resource management

#239
20110051824
2011-03-03

Method and apparatus for performing HARQ in a multiple antenna system

#240
20110051621
2011-03-03

Method of transmitting control signal in wireless communication system

#241
20110044196
2011-02-24

User equipment terminal and communication control method

#242
20110019529
2011-01-27

INTERFERENCE SUPPRESSION IN UPLINK ACKNOWLEDGEMENT

#243
20110002402
2011-01-06

Data transmission

#244
20110002278
2011-01-06

Method and apparatus for ARQ control in wireless communications

#245
20100329194
2010-12-30

Concurrent transmission of multiple acknowledge/not acknowledge and scheduling request indicator in time division duplex uplink signaling

#246
20100322324
2010-12-23

Mapping PHICH resources

#247
20100322257
2010-12-23

Sensor node for using asynchronous MAC

#248
20100303000
2010-12-02

Wireless relay device, wireless relay method, and wireless communication system

#249
20100284352
2010-11-11

Method for transmitting/receiving ACK/NAK signal in an OFDM communication system

#250
20100260340
2010-10-14

Communication system, response notifying method and apparatus

#251
20100238979
2010-09-23

Method for transmitting signals for interference randomization

#252
20100238870
2010-09-23

Communication system

#253
20100232339
2010-09-16

Method and apparatus for transmitting and receiving feedback information in a communication system including user terminals with different numbers of antennas

#254
20100220672
2010-09-02

Method for assigning signature sequences for E-HICH channel

#255
20100210256
2010-08-19

Transmission of bundled ACK/NAK bits

#256
20100208709
2010-08-19

Method of transmitting ACK/NACK bit supporting HARQ in mobile communication system supporting multi user MIMO

#257
20100202318
2010-08-12

Method for allocating physical hybrid automatic repeat request indicator channel

#258
20100189051
2010-07-29

Data modulation in a communication system

#259
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Block interleaving scheme with configurable size to achieve time and frequency diversity

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ACK/NAK repetition schemes in wireless networks

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Power for uplink acknowledgment transmission

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Method for optimizing exchanges of information on acknowledgement in asynchronous communication between terminal and network

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Method for the transmission of data using self-diagnostic pulse width modulation

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Transmission of ACK/NACK bits and their embedding in the CQI reference signal

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Methods for detecting acknowledgement channels using probabilities

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Systems and methods for transmission and reception of data including frequency and channel code selection

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Acknowledgments or negative acknowledgments by relay stations and subscriber stations