WO2006010027A3 - Method and apparatus for determining channel quality and performing adaptive modulation/coding within a multicarrier communication system - Google Patents

Method and apparatus for determining channel quality and performing adaptive modulation/coding within a multicarrier communication system Download PDF

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Publication number
WO2006010027A3
WO2006010027A3 PCT/US2005/024328 US2005024328W WO2006010027A3 WO 2006010027 A3 WO2006010027 A3 WO 2006010027A3 US 2005024328 W US2005024328 W US 2005024328W WO 2006010027 A3 WO2006010027 A3 WO 2006010027A3
Authority
WO
WIPO (PCT)
Prior art keywords
coding
channel quality
modulation
communication system
ϝeff
Prior art date
Application number
PCT/US2005/024328
Other languages
French (fr)
Other versions
WO2006010027A2 (en
Inventor
Yufei W Blankenship
Brian K Classon
Philippe J Sartori
Original Assignee
Motorola Inc
Yufei W Blankenship
Brian K Classon
Philippe J Sartori
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc, Yufei W Blankenship, Brian K Classon, Philippe J Sartori filed Critical Motorola Inc
Priority to EP05764608A priority Critical patent/EP1766826B1/en
Priority to AT05764608T priority patent/ATE522058T1/en
Priority to CN200580022958XA priority patent/CN101048963B/en
Publication of WO2006010027A2 publication Critical patent/WO2006010027A2/en
Publication of WO2006010027A3 publication Critical patent/WO2006010027A3/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0019—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy in which mode-switching is based on a statistical approach
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0012—Modulated-carrier systems arrangements for identifying the type of modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2646—Arrangements specific to the transmitter only using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H04L5/0085—Timing of allocation when channel conditions change
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0016—Time-frequency-code
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

In a multi-carrier communication system employing adaptive modulation and coding, a receiver (600) feeds back channel quality information (501) for a 'binned' group of subcarriers instead of sending an individual quality report for each subcarrier. A transmitter (100) will utilize the channel quality information for the bin to determine a set of Ϝeff values (505) corresponding to a set of modulation and coding scheme candidates (503), where Ϝeff is an effective SNR that would yield a same FER in an AWGN channel. The transmitter utilizes the set of Ϝeff values to aid in determining a modulation and coding scheme, and determine a single modulation and coding scheme (507) for all subcarriers within the channel.
PCT/US2005/024328 2004-07-07 2005-07-07 Method and apparatus for determining channel quality and performing adaptive modulation/coding within a multicarrier communication system WO2006010027A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP05764608A EP1766826B1 (en) 2004-07-07 2005-07-07 Method and apparatus for determining channel quality and performing adaptive modulation/coding within a multicarrier communication system
AT05764608T ATE522058T1 (en) 2004-07-07 2005-07-07 METHOD AND DEVICE FOR DETERMINING CHANNEL QUALITY AND EXECUTING ADAPTIVE MODULATION AND CODING IN A MULTI-CARRIER COMMUNICATIONS SYSTEM
CN200580022958XA CN101048963B (en) 2004-07-07 2005-07-07 Method and apparatus for determining channel quality and performing adaptive modulation/coding within a multicarrier communication system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/886,476 2004-07-07
US10/886,476 US7272190B2 (en) 2004-07-07 2004-07-07 Method and apparatus for determining channel quality and performing adaptive modulation/coding within a multicarrier communication system

Publications (2)

Publication Number Publication Date
WO2006010027A2 WO2006010027A2 (en) 2006-01-26
WO2006010027A3 true WO2006010027A3 (en) 2006-10-05

Family

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Family Applications (1)

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Country Status (8)

Country Link
US (1) US7272190B2 (en)
EP (1) EP1766826B1 (en)
KR (1) KR100865626B1 (en)
CN (1) CN101048963B (en)
AR (1) AR050076A1 (en)
AT (1) ATE522058T1 (en)
TW (1) TWI389519B (en)
WO (1) WO2006010027A2 (en)

Families Citing this family (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7308052B2 (en) * 2003-07-31 2007-12-11 Matsushita Electrical Industrial Co., Ltd. Radio transmitter apparatus and modulation scheme selecting method
US7606319B2 (en) * 2004-07-15 2009-10-20 Nokia Corporation Method and detector for a novel channel quality indicator for space-time encoded MIMO spread spectrum systems in frequency selective channels
US8457152B2 (en) * 2004-07-16 2013-06-04 Qualcomm Incorporated Multiple modulation schemes in single rate layering wireless communication systems
US20060034244A1 (en) * 2004-08-11 2006-02-16 Interdigital Technology Corporation Method and system for link adaptation in an orthogonal frequency division multiplexing (OFDM) wireless communication system
EP1810462A1 (en) * 2004-11-11 2007-07-25 Telefonaktiebolaget LM Ericsson (publ) Method and apparatus for routing packets
CN1780278A (en) * 2004-11-19 2006-05-31 松下电器产业株式会社 Self adaptable modification and encode method and apparatus in sub-carrier communication system
KR20070085542A (en) * 2004-11-30 2007-08-27 마츠시타 덴끼 산교 가부시키가이샤 Wireless communication apparatus and wireless communication method in multicarrier communication
US7623490B2 (en) * 2004-12-22 2009-11-24 Qualcomm Incorporated Systems and methods that utilize a capacity-based signal-to-noise ratio to predict and improve mobile communication
US7385959B1 (en) * 2005-02-28 2008-06-10 Marvell International Ltd. Power-efficient channel condition feedback for OFDM channels
US7804802B2 (en) * 2005-02-15 2010-09-28 Alvarion Ltd. Establishing parameters for transmissions in wireless communications network
JP4455389B2 (en) * 2005-04-01 2010-04-21 株式会社エヌ・ティ・ティ・ドコモ Wireless communication apparatus and wireless communication method
US20060251180A1 (en) * 2005-05-03 2006-11-09 Motorola, Inc. Method and system for selecting mcs in a communication network
US7916681B2 (en) * 2005-05-20 2011-03-29 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for communication channel error rate estimation
US7457588B2 (en) * 2005-08-01 2008-11-25 Motorola, Inc. Channel quality indicator for time, frequency and spatial channel in terrestrial radio access network
EP1898540B1 (en) * 2005-08-04 2015-10-07 Optis Wireless Technology, LLC Mobile station device
RU2418368C2 (en) 2005-08-19 2011-05-10 Панасоник Корпорэйшн Radio communication mobile station device, radio communication base station device and cqi messaging technique
US7706330B2 (en) * 2005-10-03 2010-04-27 Motorola, Inc. Method and system for link adaptation in a wireless multi-carrier communication system
US8218563B2 (en) * 2005-11-04 2012-07-10 Samsung Electronics Co., Ltd. Method and system for providing adaptive modulation and coding in a multi-carrier wireless network
US7957745B2 (en) * 2005-11-23 2011-06-07 Motorola Mobility, Inc. Adaptive bearer configuration for broadcast/multicast service
US7593384B2 (en) * 2005-12-15 2009-09-22 Telefonaktiebolaget Lm Ericsson (Publ) Efficient channel quality reporting and link adaptation for multi-carrier broadband wireless communication
US20070149132A1 (en) 2005-12-22 2007-06-28 Junyl Li Methods and apparatus related to selecting control channel reporting formats
CN101026429B (en) * 2006-02-17 2010-11-10 华为技术有限公司 Method for distributing high speed downlink sharing channels for multi carrier user device
JP4642679B2 (en) 2006-03-14 2011-03-02 富士通株式会社 Wireless communication apparatus and wireless communication method
EP2381607B1 (en) * 2006-04-21 2013-01-16 Panasonic Corporation Mimo receiver apparatus and mimo transmitter apparatus
JP2007295356A (en) * 2006-04-26 2007-11-08 Fujitsu Ltd Ofdma communication system
KR100736728B1 (en) * 2006-09-20 2007-07-09 한국전자통신연구원 Apparatus and method for fair resource allocation in the band amc mode in portable internet system
KR101093346B1 (en) * 2006-11-16 2011-12-14 엘지에릭슨 주식회사 Apparatus and method for transmitting ofdma symbol
US8959239B2 (en) * 2006-12-29 2015-02-17 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for reporting streaming media quality
KR101314611B1 (en) * 2007-01-30 2013-10-07 엘지전자 주식회사 Method And Apparatus For Selecting MCS Index According To Frequency Selectivity, And Communication System For The Same
US8077796B2 (en) * 2007-03-05 2011-12-13 Intel Corporation Methods and arrangements for communicating in a multiple input multiple output system
US8687561B2 (en) 2007-05-04 2014-04-01 Motorola Mobility Llc Method and system for link adaptation using metric feedback
JPWO2009038018A1 (en) * 2007-09-21 2011-01-06 シャープ株式会社 Wireless transmission device, wireless communication system, and wireless transmission method
KR101339587B1 (en) * 2007-12-12 2013-12-10 고려대학교 산학협력단 Method of determining modulation and coding scheme in multiple antenna system
US8300716B1 (en) 2007-12-26 2012-10-30 Marvell International Ltd. Link adaptation for OFDM systems
EP2232750B1 (en) 2007-12-26 2015-12-16 BlackBerry Limited System and method for modulation scheme changes
US8493874B2 (en) * 2008-05-05 2013-07-23 Motorola Mobility Llc Method and apparatus for providing channel quality feedback in an orthogonal frequency division multiplexing communication system
US8355360B2 (en) * 2008-05-14 2013-01-15 Motorola Mobility Llc Method and apparatus for allocating downlink power in an orthogonal frequency division multiplexing communication system
US8681721B2 (en) * 2008-05-23 2014-03-25 Telefonaktiebolaget L M Ericsson (Publ) Method for link adaptation with a signal quality margin based on the bandwidth
WO2009156794A1 (en) * 2008-06-26 2009-12-30 Freescale Semiconductor, Inc. Channel condition dependent scheduling
US8310981B2 (en) * 2008-10-22 2012-11-13 Qualcomm Incorporated Common and dedicated modulation and coding scheme for a multicarrier system
CN104702376B (en) * 2009-07-29 2018-04-13 马维尔国际贸易有限公司 The method and apparatus sent for WLAN
CN102075461B (en) * 2009-11-20 2014-11-12 富士通株式会社 Link quality estimation method and device and link adaptive method and device
CN101827456A (en) * 2010-03-24 2010-09-08 黄正裕 802.11 technology-based wireless access method and device for remote local area network
KR101758759B1 (en) * 2011-07-18 2017-07-17 삼성전자주식회사 Method and apparatus for feedback channel information in wireless communication system
US9419858B2 (en) * 2012-07-23 2016-08-16 Maxlinear, Inc. Method and system for service group management in a cable network
EP2835926B1 (en) * 2013-08-05 2019-06-12 Alcatel Lucent Transmitter apparatus for conditioning a multicarrier signal, network node, method for conditioning a multicarrier signal, and computer program thereof
CN103647742B (en) * 2013-12-25 2017-09-08 上海贝岭股份有限公司 The communication means and equipment of power line carrier ofdm system
JP6374166B2 (en) * 2014-01-17 2018-08-15 株式会社Ｎｔｔドコモ Wireless base station, user terminal, and wireless communication method
ITUB20152257A1 (en) * 2015-07-17 2017-01-17 Inst Rundfunktechnik Gmbh TRANSMITTER FOR SENDING A DATA TRANSMISSION SIGNAL AND RECEIVER FOR RECEIVING THE DATA TRANSMISSION SIGNAL
US9419838B1 (en) * 2015-08-14 2016-08-16 The Regents Of The University Of Michigan Low power wireless communication utilizing OFDM backchannels
CN106571889B (en) * 2015-10-10 2019-09-06 中国科学院上海高等研究院 Self-adaptive modulation method
CN105336147B (en) * 2015-10-21 2018-08-24 宁波三星医疗电气股份有限公司 Method for power consumer adaptive multi-carrier modulation system meter reading
US10785008B2 (en) * 2015-11-13 2020-09-22 Comcast Cable Communications, Llc Determining one or more data modulation profiles for one or more devices
EP3240226A1 (en) * 2016-04-26 2017-11-01 Xieon Networks S.à r.l. Method and apparatus for transmitting data in a super channel
CN110505029B (en) * 2019-07-31 2022-01-07 北京秋石科技有限公司 Millimeter wave band dynamic link self-adaption method and management system based on rainfall intensity
CN116746237A (en) * 2021-01-11 2023-09-12 高通股份有限公司 Variance indication of reference signals for positioning measurement occasions

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020123831A1 (en) * 2001-03-01 2002-09-05 Shinji Nakagawa Hybrid vehicle control apparatus
US20040264507A1 (en) * 2003-06-24 2004-12-30 Samsung Electronics Co., Ltd. Apparatus and method for transmitting/receiving data in a communication system using a multiple access scheme

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6985434B2 (en) * 2000-09-01 2006-01-10 Nortel Networks Limited Adaptive time diversity and spatial diversity for OFDM
US6850481B2 (en) 2000-09-01 2005-02-01 Nortel Networks Limited Channels estimation for multiple input—multiple output, orthogonal frequency division multiplexing (OFDM) system
US6701129B1 (en) 2000-09-27 2004-03-02 Nortel Networks Limited Receiver based adaptive modulation scheme
US7672381B1 (en) * 2000-10-17 2010-03-02 Motorola, Inc. Method of multiple-carrier communication within a noncontiguous wideband spectrum and apparatus therefor
US6961388B2 (en) * 2001-02-01 2005-11-01 Qualcomm, Incorporated Coding scheme for a wireless communication system
US7123580B2 (en) * 2004-01-16 2006-10-17 Nokia Corporation Multiple user adaptive modulation scheme for MC-CDMA
US20060268976A1 (en) * 2005-05-03 2006-11-30 Motorola, Inc. Method and apparatus for determining channel quality and performing adaptive modulation coding within a multi carrier communication system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020123831A1 (en) * 2001-03-01 2002-09-05 Shinji Nakagawa Hybrid vehicle control apparatus
US20040264507A1 (en) * 2003-06-24 2004-12-30 Samsung Electronics Co., Ltd. Apparatus and method for transmitting/receiving data in a communication system using a multiple access scheme

Also Published As

Publication number Publication date
EP1766826A4 (en) 2009-08-12
TW200627878A (en) 2006-08-01
US20060008020A1 (en) 2006-01-12
ATE522058T1 (en) 2011-09-15
AR050076A1 (en) 2006-09-27
CN101048963B (en) 2011-12-21
EP1766826B1 (en) 2011-08-24
TWI389519B (en) 2013-03-11
EP1766826A2 (en) 2007-03-28
KR20070041739A (en) 2007-04-19
CN101048963A (en) 2007-10-03
WO2006010027A2 (en) 2006-01-26
KR100865626B1 (en) 2008-10-27
US7272190B2 (en) 2007-09-18

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