DK3544198T3 - Fremgangsmåde og anordning i et trådløst kommunikationssystem - Google Patents

Fremgangsmåde og anordning i et trådløst kommunikationssystem Download PDF

Info

Publication number
DK3544198T3
DK3544198T3 DK19172955.7T DK19172955T DK3544198T3 DK 3544198 T3 DK3544198 T3 DK 3544198T3 DK 19172955 T DK19172955 T DK 19172955T DK 3544198 T3 DK3544198 T3 DK 3544198T3
Authority
DK
Denmark
Prior art keywords
wireless communication
communication system
wireless
communication
Prior art date
Application number
DK19172955.7T
Other languages
English (en)
Inventor
Bo Göransson
George Jöngren
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
Application granted granted Critical
Publication of DK3544198T3 publication Critical patent/DK3544198T3/da

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/005Control of transmission; Equalising
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity 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
    • H04B7/0615Diversity 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
    • H04B7/0619Diversity 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
    • H04B7/0621Feedback content
    • H04B7/0632Channel quality parameters, e.g. channel quality indicator [CQI]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0478Special codebook structures directed to feedback optimisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0482Adaptive codebooks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity 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
    • H04B7/0615Diversity 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
    • H04B7/0619Diversity 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity 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
    • H04B7/0615Diversity 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
    • H04B7/0619Diversity 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
    • H04B7/0621Feedback content
    • H04B7/0634Antenna weights or vector/matrix coefficients
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity 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
    • H04B7/0615Diversity 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
    • H04B7/0619Diversity 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
    • H04B7/0636Feedback format
    • H04B7/0639Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity 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
    • H04B7/0615Diversity 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
    • H04B7/0619Diversity 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
    • H04B7/0658Feedback reduction
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025Transmission of mode-switching indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028Formatting

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)
DK19172955.7T 2007-01-12 2007-10-18 Fremgangsmåde og anordning i et trådløst kommunikationssystem DK3544198T3 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0700062 2007-01-12
EP07835339.8A EP2119030B1 (en) 2007-01-12 2007-10-18 Method and arrangement in a wireless communications system

Publications (1)

Publication Number Publication Date
DK3544198T3 true DK3544198T3 (da) 2021-10-18

Family

ID=39608883

Family Applications (2)

Application Number Title Priority Date Filing Date
DK07835339.8T DK2119030T3 (da) 2007-01-12 2007-10-18 Fremgangsmåde og anordning i et trådløst kommunikationssystem
DK19172955.7T DK3544198T3 (da) 2007-01-12 2007-10-18 Fremgangsmåde og anordning i et trådløst kommunikationssystem

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DK07835339.8T DK2119030T3 (da) 2007-01-12 2007-10-18 Fremgangsmåde og anordning i et trådløst kommunikationssystem

Country Status (16)

Country Link
US (6) US8724543B2 (da)
EP (3) EP2119030B1 (da)
JP (1) JP5368999B2 (da)
KR (1) KR101413778B1 (da)
CN (2) CN104579445B (da)
AR (1) AR064884A1 (da)
AU (1) AU2007342726B2 (da)
DK (2) DK2119030T3 (da)
ES (2) ES2733048T3 (da)
MX (1) MX2009007129A (da)
PL (2) PL3544198T3 (da)
PT (2) PT3544198T (da)
SG (1) SG177972A1 (da)
TR (1) TR201909036T4 (da)
TW (2) TW201230710A (da)
WO (1) WO2008085096A1 (da)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8724543B2 (en) * 2007-01-12 2014-05-13 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement in a wireless communications system
KR101435846B1 (ko) * 2008-10-30 2014-08-29 엘지전자 주식회사 다중안테나를 갖는 무선 통신 시스템에서 간섭 제어 방법
CN102217206B (zh) 2009-01-05 2014-10-08 马维尔国际贸易有限公司 用于mimo通信系统的预编码码本
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
US9130607B2 (en) 2010-03-30 2015-09-08 Qualcomm Incorporated Systems, apparatuses, and methods to facilitate coordinated scheduling in wireless communication systems
PT3300263T (pt) 2010-04-07 2019-08-21 Ericsson Telefon Ab L M Estrutura de pré-codificador para pré-codificação mimo
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
PL3352380T3 (pl) * 2010-10-04 2019-11-29 Samsung Electronics Co Ltd Sposób i urządzenie do wysyłania i odbierania bitmapy ograniczenia podzbioru zestawu kodowego
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
KR20150038671A (ko) * 2010-12-02 2015-04-08 인터디지탈 패튼 홀딩스, 인크 간섭 예측을 사용하여 무선 통신에서 채널 품질 표시 피드백 정확도를 향상시키는 시스템 및 방법
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
US9020058B2 (en) 2011-11-07 2015-04-28 Marvell World Trade Ltd. Precoding feedback for cross-polarized antennas based on signal-component magnitude difference
WO2013068916A1 (en) 2011-11-07 2013-05-16 Marvell World Trade Ltd. Codebook sub-sampling for frequency-selective precoding feedback
WO2014027949A2 (en) * 2012-08-15 2014-02-20 Telefonaktiebolaget L M 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
EP1760907A4 (en) * 2004-07-30 2012-02-01 Panasonic Corp WIRELESS TRANSMITTER AND WIRELESS TRANSMITTING METHOD
US7813458B2 (en) 2004-08-20 2010-10-12 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
US8971461B2 (en) * 2005-06-01 2015-03-03 Qualcomm Incorporated CQI and rank prediction for list sphere decoding and ML MIMO receivers
US7428269B2 (en) * 2005-06-01 2008-09-23 Qualcomm Incorporated CQI and rank prediction for list sphere decoding and ML MIMO receivers
EP1896988B1 (en) * 2005-06-16 2018-11-21 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
US8724543B2 (en) * 2007-01-12 2014-05-13 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement in a wireless communications system

Also Published As

Publication number Publication date
US20210006305A1 (en) 2021-01-07
KR20090101228A (ko) 2009-09-24
US10771129B2 (en) 2020-09-08
US8724543B2 (en) 2014-05-13
US9059762B2 (en) 2015-06-16
CN101578774B (zh) 2015-01-21
SG177972A1 (en) 2012-02-28
US20140247773A1 (en) 2014-09-04
PL3544198T3 (pl) 2022-01-31
US9866296B2 (en) 2018-01-09
US20100039990A1 (en) 2010-02-18
PT2119030T (pt) 2019-07-10
EP2119030B1 (en) 2019-05-08
US20150263801A1 (en) 2015-09-17
JP2010516168A (ja) 2010-05-13
JP5368999B2 (ja) 2013-12-18
PT3544198T (pt) 2021-10-21
MX2009007129A (es) 2009-07-09
US20180131419A1 (en) 2018-05-10
AR064884A1 (es) 2009-04-29
US11552681B2 (en) 2023-01-10
ES2733048T3 (es) 2019-11-27
DK2119030T3 (da) 2019-07-08
PL2119030T3 (pl) 2019-11-29
AU2007342726A1 (en) 2008-07-17
US9531464B2 (en) 2016-12-27
KR101413778B1 (ko) 2014-06-30
CN104579445A (zh) 2015-04-29
EP2119030A1 (en) 2009-11-18
WO2008085096A1 (en) 2008-07-17
TWI382694B (zh) 2013-01-11
EP2119030A4 (en) 2015-05-06
EP3544198B1 (en) 2021-09-15
CN101578774A (zh) 2009-11-11
AU2007342726B2 (en) 2012-04-05
EP3975437A1 (en) 2022-03-30
TW200841622A (en) 2008-10-16
TW201230710A (en) 2012-07-16
US20170078005A1 (en) 2017-03-16
EP3544198A1 (en) 2019-09-25
ES2899934T3 (es) 2022-03-15
TR201909036T4 (tr) 2019-07-22
CN104579445B (zh) 2019-06-21

Similar Documents

Publication Publication Date Title
DK3444967T3 (da) Fremgangsmåde og anordning i et trådløst kommunikationssystem
DK3544198T3 (da) Fremgangsmåde og anordning i et trådløst kommunikationssystem
DK2449844T3 (da) Fremgangsmåde og anordning i et trådløst kommunikationssystem
DK3681234T3 (da) Fremgangsmåde og anordning i et trådløst kommunikationssystem
DK3605936T3 (da) Fremgangsmåder og indretninger i et telekommunikationssystem
DK2115909T3 (da) Fremgangsmåde og anordning i et telekommunikationssystem tilnabocellemålinger
DK3598690T3 (da) Fremgangsmåde og indretning i et telekommunikationssystem
DK3397009T3 (da) Fremgangsmåder og indretninger i et kommunikationsnetværk
DK2186240T3 (da) Fremgangsmåde og indretning tilpasset til overordnet modulation i trådløs kommunikation
BRPI0813485A2 (pt) Dispositivo de comunicação móvel e método
DK3142394T3 (da) Fremgangsmåde og indretning til ressourcegenanvendelse i et kommunikationssystem
DK3582423T3 (da) Fremgangsmåde og indretning i et telekommunikationssystem
DE602007001844D1 (de) Drahtloses Kommunikationsgerät und drahtloses Kommunikationsverfahren
DK3145110T3 (da) Fremgangsmåde og indretning til muting-signalering i et trådløst kommunikationsnetværk
EP2117252A4 (en) USER EQUIPMENT AND METHOD USED IN A MOBILE COMMUNICATION SYSTEM
EP2154552A4 (en) COMMUNICATION DEVICE BETWEEN LABELS AND ITS METHOD
DK2255293T3 (da) Indretninger og fremgangsmåder til evaluering af en person til et søvnsystem
EP2187671A4 (en) USER DEVICE AND METHOD IN A MOBILE COMMUNICATION SYSTEM
EP2201466A4 (en) SYSTEM AND METHOD FOR MARKING FOR A WIRELESS DEVICE
DE602007010204D1 (de) Funkkommunikationsgerät und Funkkommunikationsverfahren
DK2359489T3 (da) Fremgangsmåde og apparat til kanaltilgang i et trådløst kommunikationssystem
DK2272149T3 (da) Apparat, system og metode for en UPS
EP2180732A4 (en) RADIO COMMUNICATION DEVICE AND RADIO COMMUNICATION METHOD
DE602007010526D1 (de) Funkkommunikationsgerät und Funkkommunikationsverfahren
DK2107829T3 (da) Forstærket høretelefonanordning, system og fremgangsmåde