DK1941647T3 - Forkodning til segmentsensitiv tidsplanlægning i trådløse kommunikationssystemer - Google Patents

Forkodning til segmentsensitiv tidsplanlægning i trådløse kommunikationssystemer

Info

Publication number
DK1941647T3
DK1941647T3 DK06826907.5T DK06826907T DK1941647T3 DK 1941647 T3 DK1941647 T3 DK 1941647T3 DK 06826907 T DK06826907 T DK 06826907T DK 1941647 T3 DK1941647 T3 DK 1941647T3
Authority
DK
Denmark
Prior art keywords
coding
segment
wireless communication
communication systems
sensitive scheduling
Prior art date
Application number
DK06826907.5T
Other languages
English (en)
Inventor
Dhananjay Ashok Gore
Hemanth Sampath
Tamer Kadous
Jibing Wang
Gwendolyn Barriac
Original Assignee
Qualcomm Inc
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 Qualcomm Inc filed Critical Qualcomm Inc
Application granted granted Critical
Publication of DK1941647T3 publication Critical patent/DK1941647T3/da

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure
    • 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
    • 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
    • H04L1/0015Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0016Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy involving special memory structures, e.g. look-up tables
    • 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
    • H04L1/0026Transmission of channel quality indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/02Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0618Space-time coding
    • H04L1/0675Space-time coding characterised by the signaling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03891Spatial equalizers
    • H04L25/03898Spatial equalizers codebook-based design
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/02Channels characterised by the type of signal
    • H04L5/023Multiplexing of multicarrier modulation signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/0204Channel estimation of multiple channels
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044Arrangements for allocating sub-channels of the transmission path allocation of payload
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
DK06826907.5T 2005-10-27 2006-10-27 Forkodning til segmentsensitiv tidsplanlægning i trådløse kommunikationssystemer DK1941647T3 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US73155805P 2005-10-27 2005-10-27
PCT/US2006/042058 WO2007050924A1 (en) 2005-10-27 2006-10-27 Precoding for segment sensitive scheduling in wireless communication systems

Publications (1)

Publication Number Publication Date
DK1941647T3 true DK1941647T3 (da) 2013-08-26

Family

ID=37813600

Family Applications (1)

Application Number Title Priority Date Filing Date
DK06826907.5T DK1941647T3 (da) 2005-10-27 2006-10-27 Forkodning til segmentsensitiv tidsplanlægning i trådløse kommunikationssystemer

Country Status (19)

Country Link
US (2) US8639190B2 (da)
EP (1) EP1941647B1 (da)
JP (3) JP2009514400A (da)
KR (1) KR100969845B1 (da)
CN (1) CN101346926B (da)
AU (1) AU2006306011B2 (da)
BR (1) BRPI0617868A2 (da)
CA (1) CA2627401C (da)
DK (1) DK1941647T3 (da)
ES (1) ES2422289T3 (da)
IL (1) IL191100A (da)
MY (1) MY146738A (da)
NO (1) NO338922B1 (da)
NZ (1) NZ567799A (da)
PL (1) PL1941647T3 (da)
PT (1) PT1941647E (da)
RU (2) RU2527748C2 (da)
UA (1) UA91880C2 (da)
WO (1) WO2007050924A1 (da)

Families Citing this family (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10644916B1 (en) 2002-05-14 2020-05-05 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US8542763B2 (en) * 2004-04-02 2013-09-24 Rearden, Llc Systems and methods to coordinate transmissions in distributed wireless systems via user clustering
US11431386B1 (en) 2004-08-02 2022-08-30 Genghiscomm Holdings, LLC Transmit pre-coding
EP1941647B1 (en) 2005-10-27 2013-06-19 Qualcomm Incorporated Precoding for segment sensitive scheduling in wireless communication systems
US7917176B2 (en) * 2006-02-14 2011-03-29 Nec Laboratories America, Inc. Structured codebook and successive beamforming for multiple-antenna systems
US10873375B2 (en) * 2006-03-20 2020-12-22 Texas Instruments Incorporated Pre-coder selection based on resource block grouping
EP2022227A2 (en) * 2006-05-09 2009-02-11 Interdigital Technology Corporation Codebook precoding with variable feedback
US7839835B2 (en) * 2006-08-22 2010-11-23 Nec Laboratories America, Inc. Quantized precoding over a set of parallel channels
US7702029B2 (en) * 2006-10-02 2010-04-20 Freescale Semiconductor, Inc. MIMO precoding enabling spatial multiplexing, power allocation and adaptive modulation and coding
US7885176B2 (en) 2007-06-01 2011-02-08 Samsung Electronics Co., Ltd. Methods and apparatus for mapping modulation symbols to resources in OFDM systems
US8179775B2 (en) * 2007-08-14 2012-05-15 Texas Instruments Incorporated Precoding matrix feedback processes, circuits and systems
US8325852B2 (en) * 2007-06-08 2012-12-04 Samsung Electronics Co., Ltd. CDD precoding for open loop SU MIMO
US8798183B2 (en) * 2007-08-13 2014-08-05 Qualcomm Incorporated Feedback and rate adaptation for MIMO transmission in a time division duplexed (TDD) communication system
US8830812B2 (en) * 2007-08-31 2014-09-09 Alcatel Lucent Optimizing precoder settings using average SINR reports for groups of tones
KR100991793B1 (ko) 2007-12-31 2010-11-03 엘지전자 주식회사 셀간 간섭 감소 방법
CN101960729B (zh) 2008-02-28 2014-05-07 苹果公司 传送包含标识要应用于无线传送的信令的编码的信息的反馈数据结构
US8144797B2 (en) * 2008-03-25 2012-03-27 Intel Mobile Communications GmbH CQI table for wireless MIMO networks
US8238954B2 (en) * 2008-06-25 2012-08-07 Samsung Electronics Co., Ltd. Inter-cell interference avoidance for downlink transmission
US8072899B2 (en) * 2008-07-02 2011-12-06 Interdigital Patent Holdings, Inc. Method and apparatus for measuring and reporting a rank and a precoding matrix for multiple-input multiple-output communication
KR101495824B1 (ko) * 2008-08-22 2015-02-25 삼성전자주식회사 다중 안테나 무선통신 시스템에서 프리코딩 행렬 선택 방법및 장치
JP5218977B2 (ja) * 2008-12-02 2013-06-26 日本電気株式会社 通信装置、無線通信システムおよびフィードバック情報演算時の近似方法ならびにプログラム
US20110103510A1 (en) * 2009-04-23 2011-05-05 Qualcomm Incorporated Rank and precoding indication for mimo operation
US20110105137A1 (en) * 2009-04-23 2011-05-05 Qualcomm Incorporated Rank and precoding indication for mimo operation
US8699610B2 (en) 2009-07-30 2014-04-15 Lg Electronics Inc. Feedback scheme for multi-cell interference mitigation consideration legacy mobile users
EP2556638B1 (en) * 2010-04-06 2015-05-27 Nokia Technologies OY Codebook design and structure for modular feedback
CN101877627B (zh) * 2010-06-21 2015-09-16 中兴通讯股份有限公司 信道状态信息的反馈方法及终端
US9112737B2 (en) * 2013-03-06 2015-08-18 Qualcomm Incorporated Systems and methods for determining a channel variation metric
US10637705B1 (en) 2017-05-25 2020-04-28 Genghiscomm Holdings, LLC Peak-to-average-power reduction for OFDM multiple access
US10243773B1 (en) 2017-06-30 2019-03-26 Genghiscomm Holdings, LLC Efficient peak-to-average-power reduction for OFDM and MIMO-OFDM
US10812216B2 (en) 2018-11-05 2020-10-20 XCOM Labs, Inc. Cooperative multiple-input multiple-output downlink scheduling
US10659112B1 (en) 2018-11-05 2020-05-19 XCOM Labs, Inc. User equipment assisted multiple-input multiple-output downlink configuration
US10432272B1 (en) 2018-11-05 2019-10-01 XCOM Labs, Inc. Variable multiple-input multiple-output downlink user equipment
US10756860B2 (en) 2018-11-05 2020-08-25 XCOM Labs, Inc. Distributed multiple-input multiple-output downlink configuration
CA3119325C (en) 2018-11-27 2023-07-04 XCOM Labs, Inc. Non-coherent cooperative multiple-input multiple-output communications
US10756795B2 (en) 2018-12-18 2020-08-25 XCOM Labs, Inc. User equipment with cellular link and peer-to-peer link
US11063645B2 (en) 2018-12-18 2021-07-13 XCOM Labs, Inc. Methods of wirelessly communicating with a group of devices
US11330649B2 (en) 2019-01-25 2022-05-10 XCOM Labs, Inc. Methods and systems of multi-link peer-to-peer communications
US11917604B2 (en) 2019-01-25 2024-02-27 Tybalt, Llc Orthogonal multiple access and non-orthogonal multiple access
US10756767B1 (en) 2019-02-05 2020-08-25 XCOM Labs, Inc. User equipment for wirelessly communicating cellular signal with another user equipment
US11032841B2 (en) 2019-04-26 2021-06-08 XCOM Labs, Inc. Downlink active set management for multiple-input multiple-output communications
US10756782B1 (en) 2019-04-26 2020-08-25 XCOM Labs, Inc. Uplink active set management for multiple-input multiple-output communications
US10686502B1 (en) 2019-04-29 2020-06-16 XCOM Labs, Inc. Downlink user equipment selection
US10735057B1 (en) 2019-04-29 2020-08-04 XCOM Labs, Inc. Uplink user equipment selection
CN111954309A (zh) * 2019-05-17 2020-11-17 株式会社Ntt都科摩 终端和基站
WO2020242898A1 (en) 2019-05-26 2020-12-03 Genghiscomm Holdings, LLC Non-orthogonal multiple access
US11411778B2 (en) 2019-07-12 2022-08-09 XCOM Labs, Inc. Time-division duplex multiple input multiple output calibration
US11411779B2 (en) 2020-03-31 2022-08-09 XCOM Labs, Inc. Reference signal channel estimation
CA3178604A1 (en) 2020-05-26 2021-12-02 XCOM Labs, Inc. Interference-aware beamforming
EP4229846A1 (en) 2020-10-19 2023-08-23 Xcom Labs, Inc. Reference signal for wireless communication systems
WO2022093988A1 (en) 2020-10-30 2022-05-05 XCOM Labs, Inc. Clustering and/or rate selection in multiple-input multiple-output communication systems

Family Cites Families (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR980007105A (ko) * 1996-06-28 1998-03-30 김광호 이동국 송신전력 제어방법
JPH11136180A (ja) * 1997-10-31 1999-05-21 Sony Corp データ通信方法、送信装置及びセルラー無線通信システム
US5955992A (en) * 1998-02-12 1999-09-21 Shattil; Steve J. Frequency-shifted feedback cavity used as a phased array antenna controller and carrier interference multiple access spread-spectrum transmitter
US6704399B1 (en) * 1999-04-12 2004-03-09 Conexant Systems, Inc. Quick connect parameter exchange
FI107307B (fi) * 2000-01-18 2001-06-29 Tellabs Oy Menetelmä ja laitteisto kanavakorjauksen tekemiseksi digitaalisella tietoliikenneyhteydellä
US6473467B1 (en) * 2000-03-22 2002-10-29 Qualcomm Incorporated Method and apparatus for measuring reporting channel state information in a high efficiency, high performance communications system
KR20020087001A (ko) 2000-04-25 2002-11-21 코닌클리케 필립스 일렉트로닉스 엔.브이. 엔-비트 소스어를 대응한 엠-비트 채널어로, 이와 반대로인코딩 및 디코딩하는 장치
US6859503B2 (en) 2001-04-07 2005-02-22 Motorola, Inc. Method and system in a transceiver for controlling a multiple-input, multiple-output communications channel
RU2207723C1 (ru) 2001-10-01 2003-06-27 Военный университет связи Способ распределения ресурсов в системе электросвязи с множественным доступом
US7154936B2 (en) 2001-12-03 2006-12-26 Qualcomm, Incorporated Iterative detection and decoding for a MIMO-OFDM system
US7020110B2 (en) 2002-01-08 2006-03-28 Qualcomm Incorporated Resource allocation for MIMO-OFDM communication systems
US7197084B2 (en) * 2002-03-27 2007-03-27 Qualcomm Incorporated Precoding for a multipath channel in a MIMO system
US8208364B2 (en) * 2002-10-25 2012-06-26 Qualcomm Incorporated MIMO system with multiple spatial multiplexing modes
KR100494844B1 (ko) * 2002-12-21 2005-06-14 한국전자통신연구원 통신 시스템의 적응형 자원 할당 방법
US7327795B2 (en) 2003-03-31 2008-02-05 Vecima Networks Inc. System and method for wireless communication systems
TW593511B (en) 2003-04-25 2004-06-21 Posaidon Entpr Co Ltd An interpenetrating network elastomeric composition and process for producing gloves by using such composition
CN1759617B (zh) * 2003-05-01 2012-03-21 美国博通公司 利用基于射频和基带传输信号加权与合并的多天线通信系统权重生成方法
KR100575993B1 (ko) * 2003-08-07 2006-05-02 삼성전자주식회사 다중 송수신 안테나를 사용하는 이동통신 시스템에서 다중사용자를 위한 스케쥴링 방법 및 장치
KR100943624B1 (ko) * 2003-09-15 2010-02-24 삼성전자주식회사 직교 주파수 분할 다중 통신 시스템에서 동적 자원 할당장치 및 방법
KR100913874B1 (ko) * 2003-10-27 2009-08-26 삼성전자주식회사 직교주파수분할다중 시스템에서 부채널 간 간섭 제거 방법
US8705659B2 (en) * 2003-11-06 2014-04-22 Apple Inc. Communication channel optimization systems and methods in multi-user communication systems
KR20050109863A (ko) * 2004-05-17 2005-11-22 삼성전자주식회사 다중 사용자 mimo/ofdma 시스템을 위한 부채널및 비트 할당 기법
US8116262B2 (en) * 2004-06-22 2012-02-14 Rockstar Bidco Lp Methods and systems for enabling feedback in wireless communication networks
ATE527794T1 (de) * 2004-08-12 2011-10-15 Interdigital Tech Corp Verfahren und vorrichtung zur implementierung von raum-frequenz-blockcodierung in einem drahtlosen orthogonalen frequenzmultiplex- kommunikationssystem
US8031642B2 (en) * 2004-10-20 2011-10-04 Zte (Usa) Inc. Subcarrier cluster-based power control in wireless communications
US7139328B2 (en) 2004-11-04 2006-11-21 Motorola, Inc. Method and apparatus for closed loop data transmission
US8031793B2 (en) * 2005-01-19 2011-10-04 Dumitru Mihai Ionescu Apparatus using concatenations of signal-space codes for jointly encoding across multiple transmit antennas, and employing coordinate interleaving
KR100950644B1 (ko) * 2005-03-04 2010-04-01 삼성전자주식회사 다중사용자 다중입출력 시스템의 피드백 방법
US7602855B2 (en) * 2005-04-01 2009-10-13 Interdigital Technology Corporation Method and apparatus for singular value decomposition of a channel matrix
US7466964B2 (en) * 2005-06-29 2008-12-16 Intel Corporation Wireless communication device and method for coordinated channel access with reduced latency in a wireless network
EP1941647B1 (en) 2005-10-27 2013-06-19 Qualcomm Incorporated Precoding for segment sensitive scheduling in wireless communication systems
US20070149249A1 (en) * 2005-12-22 2007-06-28 Interdigital Technology Corporation Method and apparatus for efficient configuration of hybrid sub-carrier allocation
US8583132B2 (en) * 2006-05-18 2013-11-12 Qualcomm Incorporated Efficient channel structure for a wireless communication system
MY157698A (en) * 2006-08-17 2016-07-15 Intel Corp Method and apparatus for providing efficient precoding feedback in a mimo wireless communication system
US9131486B2 (en) * 2006-12-01 2015-09-08 Qualcomm Incorporated Control signal transmission for wireless communication systems
US8379578B2 (en) * 2006-12-01 2013-02-19 Qualcomm Incorporated Control signal transmission for wireless communication systems

Also Published As

Publication number Publication date
JP2009514400A (ja) 2009-04-02
UA91880C2 (ru) 2010-09-10
EP1941647A1 (en) 2008-07-09
US20140219189A1 (en) 2014-08-07
RU2008121170A (ru) 2009-12-10
PL1941647T3 (pl) 2013-10-31
US8639190B2 (en) 2014-01-28
JP5661556B2 (ja) 2015-01-28
JP2013258726A (ja) 2013-12-26
PT1941647E (pt) 2013-08-22
IL191100A (en) 2012-08-30
RU2384958C2 (ru) 2010-03-20
NO338922B1 (no) 2016-10-31
CN101346926A (zh) 2009-01-14
RU2009143440A (ru) 2011-05-27
AU2006306011A1 (en) 2007-05-03
BRPI0617868A2 (pt) 2011-08-09
WO2007050924A1 (en) 2007-05-03
CA2627401C (en) 2015-05-05
ES2422289T3 (es) 2013-09-10
NO20082363L (no) 2008-07-08
US20070098099A1 (en) 2007-05-03
KR100969845B1 (ko) 2010-07-13
RU2527748C2 (ru) 2014-09-10
JP2011205669A (ja) 2011-10-13
EP1941647B1 (en) 2013-06-19
CN101346926B (zh) 2012-11-14
US8971823B2 (en) 2015-03-03
AU2006306011B2 (en) 2010-09-09
MY146738A (en) 2012-09-14
KR20080069655A (ko) 2008-07-28
NZ567799A (en) 2010-05-28
CA2627401A1 (en) 2007-05-03

Similar Documents

Publication Publication Date Title
DK1941647T3 (da) Forkodning til segmentsensitiv tidsplanlægning i trådløse kommunikationssystemer
PL1932296T3 (pl) Systemy komunikacji bezprzewodowej z szeregowaniem
DE602007005454D1 (de) Drahtloses Kommunikationssystem
DE602005025554D1 (de) Umfassendes Kommunikationssystem
TWI371937B (en) Communication system
EP1852986A4 (en) WIRELESS COMMUNICATION SYSTEM
EP1916806A4 (en) WIRELESS COMMUNICATION SYSTEM
TWI373220B (en) Eigen-beamforming for wireless communication systems
DE602007000400D1 (de) Drahtloses Kommunikationssystem
EP1838012A4 (en) WIRELESS COMMUNICATION SYSTEM
HK1113443A1 (en) Communication system
EP1949756A4 (en) COMMUNICATION SYSTEM
GB0503291D0 (en) Mobile communication
EP1838022A4 (en) WIRELESS COMMUNICATION SYSTEM
GB0620373D0 (en) Wireless communication systems
DE602008005068D1 (de) Funkkommunikationssystem
EP1955476A4 (en) COMMUNICATION WITHIN A GROUP
GB0500223D0 (en) Communication system
DE602005008965D1 (de) Aeronautisches Kommunikationssystem
GB2427792B (en) Wireless communications system
DE602005008354D1 (de) Kommunikationssystem
GB2426893B (en) Wireless communications system
GB2425440B (en) Wireless communications system
SG126826A1 (en) Wireless phone system
EP1863195A4 (en) MOBILE COMMUNICATION SYSTEM