PT3544198T - Método e configuração num sistema de comunicações sem fios - Google Patents

Método e configuração num sistema de comunicações sem fios

Info

Publication number
PT3544198T
PT3544198T PT191729557T PT19172955T PT3544198T PT 3544198 T PT3544198 T PT 3544198T PT 191729557 T PT191729557 T PT 191729557T PT 19172955 T PT19172955 T PT 19172955T PT 3544198 T PT3544198 T PT 3544198T
Authority
PT
Portugal
Prior art keywords
arrangement
wireless communications
communications system
wireless
communications
Prior art date
Application number
PT191729557T
Other languages
English (en)
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of PT3544198T publication Critical patent/PT3544198T/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/005—Control of transmission; Equalising
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0478—Special codebook structures directed to feedback optimisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0482—Adaptive codebooks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0634—Antenna weights or vector/matrix coefficients
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0658—Feedback reduction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • 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
    • 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
    • H04L1/0025—Transmission of mode-switching indication
    • 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
    • H04L1/0028—Formatting

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)
PT191729557T 2007-01-12 2007-10-18 Método e configuração num sistema de comunicações sem fios PT3544198T (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0700062 2007-01-12

Publications (1)

Publication Number Publication Date
PT3544198T true PT3544198T (pt) 2021-10-21

Family

ID=39608883

Family Applications (2)

Application Number Title Priority Date Filing Date
PT07835339T PT2119030T (pt) 2007-01-12 2007-10-18 Método e configuração num sistema de comunicações sem fios
PT191729557T PT3544198T (pt) 2007-01-12 2007-10-18 Método e configuração num sistema de comunicações sem fios

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PT07835339T PT2119030T (pt) 2007-01-12 2007-10-18 Método e configuração num sistema de comunicações sem fios

Country Status (16)

Country Link
US (6) US8724543B2 (pt)
EP (3) EP3544198B1 (pt)
JP (1) JP5368999B2 (pt)
KR (1) KR101413778B1 (pt)
CN (2) CN104579445B (pt)
AR (1) AR064884A1 (pt)
AU (1) AU2007342726B2 (pt)
DK (2) DK2119030T3 (pt)
ES (2) ES2733048T3 (pt)
MX (1) MX2009007129A (pt)
PL (2) PL2119030T3 (pt)
PT (2) PT2119030T (pt)
SG (1) SG177972A1 (pt)
TR (1) TR201909036T4 (pt)
TW (2) TW201230710A (pt)
WO (1) WO2008085096A1 (pt)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104579445B (zh) * 2007-01-12 2019-06-21 Lm爱立信电话有限公司 无线通信系统中的方法和结构
KR101435846B1 (ko) * 2008-10-30 2014-08-29 엘지전자 주식회사 다중안테나를 갖는 무선 통신 시스템에서 간섭 제어 방법
US8391392B2 (en) 2009-01-05 2013-03-05 Marvell World Trade Ltd. Precoding codebooks for MIMO communication systems
KR101505689B1 (ko) * 2009-01-08 2015-03-25 엘지전자 주식회사 다중 셀 협력에 기반하는 데이터 전송 방법
JP5258002B2 (ja) * 2010-02-10 2013-08-07 マーベル ワールド トレード リミテッド Ｍｉｍｏ通信システムにおける装置、移動通信端末、チップセット、およびその方法
US8948800B2 (en) * 2010-03-30 2015-02-03 Qualcomm Incorporated Systems, apparatuses, and methods to facilitate coordinated scheduling in wireless communication systems
DK2556597T3 (en) 2010-04-07 2017-09-25 ERICSSON TELEFON AB L M (publ) PRE-CODE STRUCTURE FOR MIMO CODE
CN101917365B (zh) * 2010-08-16 2015-06-03 中兴通讯股份有限公司 一种码本的配置方法、装置和系统
EP2437408B1 (en) * 2010-10-04 2017-12-27 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving codebook subset restriction bitmap
JP2012100254A (ja) 2010-10-06 2012-05-24 Marvell World Trade Ltd Ｐｕｃｃｈフィードバックのためのコードブックサブサンプリング
EP2647149A1 (en) * 2010-12-02 2013-10-09 Interdigital Patent Holdings, Inc. Systems and methods for improving channel quality indication feedback accuracy in wireless communication using interference prediction
JP5265657B2 (ja) * 2010-12-27 2013-08-14 シャープ株式会社 基地局装置、端末装置、通信システムおよび通信方法
WO2013068915A2 (en) 2011-11-07 2013-05-16 Marvell World Trade Ltd. Precoding feedback for cross-polarized antennas with magnitude information
WO2013068916A1 (en) 2011-11-07 2013-05-16 Marvell World Trade Ltd. Codebook sub-sampling for frequency-selective precoding feedback
EP2885891B1 (en) * 2012-08-15 2016-11-30 Telefonaktiebolaget LM Ericsson (publ) Implementing codebook subset restrictions in wireless communication systems
JP5701332B2 (ja) * 2013-05-07 2015-04-15 シャープ株式会社 基地局装置、端末装置、通信システムおよび通信方法
CN104144030B (zh) * 2013-05-09 2019-05-10 中兴通讯股份有限公司 数据发送、接收方法、数据发送及接收端
US9872242B2 (en) * 2014-01-31 2018-01-16 Qualcomm Incorporated Joint transmission of CSI-RS for channel state feedback and transmission point selection
US9692579B2 (en) * 2014-08-05 2017-06-27 Telefonaktiebolaget Lm Ericsson (Publ) Multiple description media broadcast aided by a secondary base station
US10439690B2 (en) * 2015-10-23 2019-10-08 Samsung Electronics Co., Ltd. Precoder codebook for advanced wireless communication systems
EP3358754A1 (en) * 2017-02-02 2018-08-08 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Antenna array codebook with beamforming coefficients adapted to an arbitrary antenna response of the antenna array
EP3588800A1 (en) 2018-06-29 2020-01-01 FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V. Antenna array codebook with beamforming coefficients adapted to an arbitrary antenna response of the antenna array

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19950653B4 (de) * 1999-10-21 2020-01-16 Ipcom Gmbh & Co. Kg Verfahren zum Betreiben eines Mobilfunknetzes
US7242724B2 (en) * 2003-07-16 2007-07-10 Lucent Technologies Inc. Method and apparatus for transmitting signals in a multi-antenna mobile communications system that compensates for channel variations
US7684372B2 (en) * 2004-05-04 2010-03-23 Ipwireless, Inc. Signaling MIMO allocations
KR101053610B1 (ko) * 2004-06-25 2011-08-03 엘지전자 주식회사 Ｏｆｄｍ／ｏｆｄｍａ 시스템의 무선자원 할당 방법
US7796938B2 (en) * 2004-07-30 2010-09-14 Panasonic Corporation Wireless transmitter and method that select a subcarrier based on subcarrier reception quality information
EP1779574A1 (en) 2004-08-20 2007-05-02 Nokia Corporation System and method for precoding in a multiple-input multiple-output (mimo) system
US7778826B2 (en) 2005-01-13 2010-08-17 Intel Corporation Beamforming codebook generation system and associated methods
US8189714B2 (en) * 2005-05-04 2012-05-29 Rockstar Bidco, LP Wireless feedback system and method
KR101124932B1 (ko) * 2005-05-30 2012-03-28 삼성전자주식회사 어레이 안테나를 이용하는 이동 통신 시스템에서의 데이터송/수신 장치 및 방법
US7428269B2 (en) * 2005-06-01 2008-09-23 Qualcomm Incorporated CQI and rank prediction for list sphere decoding and ML MIMO receivers
US8971461B2 (en) * 2005-06-01 2015-03-03 Qualcomm Incorporated CQI and rank prediction for list sphere decoding and ML MIMO receivers
US7907958B2 (en) * 2005-06-16 2011-03-15 Qualcomm, Incorporated Negotiated channel information reporting in a wireless communication system
US9136974B2 (en) 2005-08-30 2015-09-15 Qualcomm Incorporated Precoding and SDMA support
US20070165738A1 (en) 2005-10-27 2007-07-19 Barriac Gwendolyn D Method and apparatus for pre-coding for a mimo system
US10248914B2 (en) * 2005-11-29 2019-04-02 The Boeing Company Sustaining a fleet of configuration-controlled assets
US8238322B2 (en) * 2006-06-30 2012-08-07 Nokia Corporation Optimizing of channel allocation in a wireless communications system
CN104579445B (zh) * 2007-01-12 2019-06-21 Lm爱立信电话有限公司 无线通信系统中的方法和结构

Also Published As

Publication number Publication date
TW201230710A (en) 2012-07-16
TW200841622A (en) 2008-10-16
US9531464B2 (en) 2016-12-27
US20100039990A1 (en) 2010-02-18
CN101578774A (zh) 2009-11-11
AU2007342726A1 (en) 2008-07-17
EP3544198B1 (en) 2021-09-15
US8724543B2 (en) 2014-05-13
PT2119030T (pt) 2019-07-10
JP2010516168A (ja) 2010-05-13
EP2119030A1 (en) 2009-11-18
US11552681B2 (en) 2023-01-10
DK2119030T3 (da) 2019-07-08
US10771129B2 (en) 2020-09-08
TWI382694B (zh) 2013-01-11
US20170078005A1 (en) 2017-03-16
CN104579445A (zh) 2015-04-29
CN104579445B (zh) 2019-06-21
PL2119030T3 (pl) 2019-11-29
KR101413778B1 (ko) 2014-06-30
AR064884A1 (es) 2009-04-29
AU2007342726B2 (en) 2012-04-05
SG177972A1 (en) 2012-02-28
EP3975437A1 (en) 2022-03-30
US20140247773A1 (en) 2014-09-04
DK3544198T3 (da) 2021-10-18
EP2119030B1 (en) 2019-05-08
ES2899934T3 (es) 2022-03-15
US20150263801A1 (en) 2015-09-17
ES2733048T3 (es) 2019-11-27
US9866296B2 (en) 2018-01-09
MX2009007129A (es) 2009-07-09
US20180131419A1 (en) 2018-05-10
CN101578774B (zh) 2015-01-21
US9059762B2 (en) 2015-06-16
PL3544198T3 (pl) 2022-01-31
US20210006305A1 (en) 2021-01-07
EP2119030A4 (en) 2015-05-06
KR20090101228A (ko) 2009-09-24
EP3544198A1 (en) 2019-09-25
TR201909036T4 (tr) 2019-07-22
WO2008085096A1 (en) 2008-07-17
JP5368999B2 (ja) 2013-12-18

Similar Documents

Publication Publication Date Title
PL3174221T3 (pl) Sposób i układ w bezprzewodowym systemie komunikacji
PT2119030T (pt) Método e configuração num sistema de comunicações sem fios
HK1204721A1 (en) Method and arrangement in a communication system
HUE049123T2 (hu) Eljárás és elrendezés vezeték nélküli kommunikációs rendszerben
HK1171312A1 (zh) 無線通信系統中的方法和布置
EP2394455A4 (en) Method and arrangement in a wireless communication system
GB201006802D0 (en) Wireless communication system and method
EP2200352A4 (en) WIRELESS COMMUNICATION SYSTEM AND METHOD
EP2062374A4 (en) WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD
EP2102999A4 (en) METHOD AND ARRANGEMENT IN A COMMUNICATION SYSTEM
EP2338240A4 (en) METHOD IN A WIRELESS COMMUNICATION SYSTEM
TWI350675B (en) Wireless communication system and method
EP2186223A4 (en) SYSTEM AND METHOD FOR EXECUTING COMMUNICATIONS IN A WIRELESS COMMUNICATIONS NETWORK
EP2491737A4 (en) METHOD AND DISPOSITION IN A WIRELESS COMMUNICATION SYSTEM
HK1125236A1 (en) A method and system for wireless communication
EP2496018A4 (en) COMMUNICATION METHOD IN A MOBILE COMMUNICATION SYSTEM AND CORRESPONDING SYSTEM
EP2266338A4 (en) SYSTEM AND METHOD FOR THE USE OF SPECTRAL RESOURCES IN WIRELESS COMMUNICATION SYSTEMS
HUE041539T2 (hu) Eljárás és elrendezés vezeték nélküli kommunikációs hálózatban
EP2291929A4 (en) METHOD AND ARRANGEMENT IN A COMMUNICATION SYSTEM
EP2082549A4 (en) METHOD AND ARRANGEMENT IN A COMMUNICATION SYSTEM
EP2425559A4 (en) METHOD AND ARRANGEMENTS IN A WIRELESS COMMUNICATION SYSTEM
IL206733A0 (en) Method and arrangement in a wireless communication network
EP2449828A4 (en) METHOD AND ARRANGEMENT IN A WIRELESS COMMUNICATION SYSTEM
EP2018748A4 (en) METHOD AND ARRANGEMENT IN A COMMUNICATION SYSTEM
EP2478633A4 (en) Method and arrangement in a mobile communication system