CN1666191B - 执行无线切换的方法 - Google Patents

执行无线切换的方法 Download PDF

Info

Publication number
CN1666191B
CN1666191B CN038159236A CN03815923A CN1666191B CN 1666191 B CN1666191 B CN 1666191B CN 038159236 A CN038159236 A CN 038159236A CN 03815923 A CN03815923 A CN 03815923A CN 1666191 B CN1666191 B CN 1666191B
Authority
CN
China
Prior art keywords
user
wlan
frequency
carrier
sap
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
CN038159236A
Other languages
English (en)
Other versions
CN1666191A (zh
Inventor
朱安·卡勒斯·强尼加
泰瑞沙·琼安·亨克勒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
InterDigital Technology Corp
Original Assignee
InterDigital Technology Corp
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 InterDigital Technology Corp filed Critical InterDigital Technology Corp
Publication of CN1666191A publication Critical patent/CN1666191A/zh
Application granted granted Critical
Publication of CN1666191B publication Critical patent/CN1666191B/zh
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10—Dynamic resource partitioning
    • 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
    • H04L5/0023—Time-frequency-space
    • 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
    • H04B7/0617—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 for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Small-Scale Networks (AREA)
  • Transmitters (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Radio Transmission System (AREA)

Abstract

一种无线LAN(WLAN)系统，用于在基本服务系统或胞元内多个用户间的通信，包含一切换存取点(SAP)以传输及接受一点至多点的通信至及自用户。在SAP有多个端口可供使用，每个端口被指定一独特载体频率，具非永久频率指定的能力及动态或伪随机载体指定能力，可隔离用户间的通信以防止冲突。SAP的另一实施例利用波束形成以提供空间端口以指定给多个用户。

Description

执行无线切换的方法
技术领域
本发明有关与数用户连接的无线LAN系统(WLAN)，特别是关于供避免冲突的WLAN系统的切换。
背景技术
WLAN系统利用无执照波段供无线通信。一无线LAN(WLAN)通信系统可自一特别终端至一理想目的地，相同基本服务系统(BSS)内或基干网络的另一终端，但始终在同一载体内。WLAN系统有二作业模式：项目及基础结构。项目模式中，终端可一点至多点方式彼此通话。基本结构模式时，一存取点(AP)作为一基站以控制用户间的通话，因而提供一点至多点无线网络。因所有用户均分享WLAN中的一相同媒体，基本结构模式变为半繁忙至繁忙负荷的网络更有效率。
在基本结构模式中，当发送数据至理想目的地终端时，终端首先与AP通话。AP于是桥路或路由信息至理想目的地。因此在此模式中，WLAN通信系统的一AP控制BSS或单元中的传输。
媒体存取控制(MAC)协议被限定协调分享该波段的WLAN用户的频道使用。此等MAC协议是基于避免用户间同时存取频道的冲突。协议的效率以成功的避免冲突而衡量。
WLAN使用的二协议为CSMA/CA MAC及CSMA/CD以太网协议。二协议可感测出其它传输的载体。以太网可以不同方式连接，包括以太网网络集线器及以太网开关。以太网网络集线器将中央点的连接集中为一点至多点连接，而不影响性能。一以太网开关在来自终端的包封每次到达时操作。该开关读取目的地的地址，了解其连接至何端口，及在二物理端口之间作成直接连接。该以太网开关的优点为，MAC不能感测媒体中的任何用户，与以太网络集线器比较，因而经由冲突降低可能性及可改进输出量而改善性能。一以太网络集线器将接收的包封传输至所有用户，即使仅有一个接收者亦如此。该网络集线器不检示地址信息。以太网络开关仅发出包封直接至预定的目的地，结果导致可用带宽的更有效利用。
一般WLAN AP无法同时利用一个以上的载波频率，因而引起低协议效率。以太网开关已证明可大幅改善以太网协议的效率。
因此，当终端分享相同媒体时，需要一能改进无线点至多点网络的性能的方法。
发明内容
在一基本服务系统或包含切换存取点(SAP)的单元，以传输及接收一点至多点通信自及至各用户的一种无线LAN(WLAN)系统中。在SAP有多个端口可资利用，以非永久频率指定的能力及动态或伪随机载体指定的能力，每一被指定一独特载波频率以隔离用户间的通信，以防止冲突。SAP的另一实施例利用波束形成以提供空间端口指定给多个用户。
附图说明
图1A显示具有频率载体以太网络端口的一WLAN的系统图。
图1B显示一简化的用户终端及利用频率载体以太网络端口的切换存取点的略图。
图2A显示具有空间波束以太网络端口的WLAN的系统图。
图2B显示用户终端及利用空间波束以太网络端口的切换存取点的简化图。
具体实施方式
图1A显示一系统，其应用以太网络切换原则于一存取点(AP)以操作多频率，使该AP变成一切换存取点(SAP)106。频率载体f1-f5被认为SAP中不同端口处理，自SAP该用户终端101-105以控制方式具有集中的存取至频率载体f1-f5。
如图1A所示，每一用户终端101-105被指定一频率载体f1-f5，SAP106有能力接收及发射每一载体f1-f5。为避免永久指定载体f1-f5给每一用户终端101-105，可使用二种方法。在较佳实施例中，理想是但非必要，不永久指定载体给用户终端101-105。一非永久指定可避免指定给一不发射数据的一终端。当更多终端较可用频率多时，如一永久指定的频率终端而不使用该频率时，一有发射数据的终端可被防止指定频率。
一动态载体指定DCA计划可予应用，其中，用户终端101-105在共享载体中发出请求传输(RTS)，于是SAP以可以传输(CTS)回答，指出该载体可用来供传输之用。
或者，可利用一跳频计划，其中，用户终端101-105具有一伪随机顺序以改变载体，由用户终端101-105及SAP106称为先验，以便使二用户终端同时利用相同载体的可能性最小。根据目前802.11b标准发展的较佳WLAN，三载体供跳频之用。但802.11a标准中，八载体供跳频之用。无线切换系统100可利用DCA及跳频或分别及组合使用。
图1B说明一较佳用户终端及利用多频率的SAP。SAP 106有一频率指定装置120以指定频率(频率端口)给用户终端101-105。一多频率接收机118接收自终端101-105利用指定的频率端口发出的数据。一多频率发射机116自一终端至另一终端利用目的地终端的指定频率发射数据。多频率发射机116较佳亦发射指定至终端101-105。一天线122或天线列用以发出及接收由SAP106的数据于数据接口124上。
终端101-105有一多频率接收机114以接收频率指定，及在终端的指定频率上恢复发射的数据。一频率控制器108利用接收的指定频率以控制终端101-105的发射及接收频率。一多频率发射机110在指定频率上发射数据。
图2A显示无线切换的另一实施例，其指定每一用户终端201-205以空间端口而非特殊频率如图2A所示，空间波束b1-b5由波束形成建立，可用以作为端口以便将用户终端201-206彼此隔离。SAP206可辨认每一用户终端201-205的目的地的地址，及将波束与每一地址关连。SAP206能同时接收一个以上的波束。
图2B说明较佳用户终端及利用空间波束的SAP。该SAP206有一波束控制器220以决定何一波束(空间端口)与一特别用户有关。该控制器220提供一波束形成发射机216及波束形成接收机218供波束信息之用，使一适当空间端口用来供一指定的终端。一天线阵列214用来在无线接口222上传输及接收数据。
终端201-205具有一波束形成接收机210，以接收利用天线阵列212发射的数据。波束形成发射机208利用天线阵列212发射数据至SAP206。
虽然，图1A，1B，2A及2B中的系统构型显示五个用户终端，任何数目的用户终端均可使用。其目的为示范而非限制系统能力范围。图1A及2A中的无线切换系统可分别使用或联合使用。为说明起见，用户终端101-105可由空间波束及频率的组合加以区别。图1A及2A的无线切换系统可应用于包括以下系统，但不限于，直接顺序(DS)WLAN及正交频率区分多任务(OFDM)WLAN系统。

Claims (6)

1.一种无线LAN(WLAN)系统，用于在一基本服务系统或胞元内的多个用户间的通信，包含：
一切换存取点(SAP)，用以传输及接收一点至多点的通信至及自各用户，该切换存取点包含：
一多频发射机，经设置以执行波束形成发射；
一指定装置；及
多个用户终端，每一用户终端经由该指定装置而被指定一独特的空间端口与载体频率的组合，以隔离用户间的通信以防止冲突；
其中每一指定并非永久，反之，有一以自用户的请求发送信号及自SAP的清除发送信号来达成动态或伪随机载体指定的能力。
2.如权利要求1所述的系统，其特征在于该核准传送信号指示一指定给用户的频率。
3.如权利要求1所述的系统，其特征在于该核准传送信号指示给用户的伪随机载体指定。
4.如权利要求1所述的系统，其特征在于该伪随机载体指定是由用户沿改变载体的顺序跳频而达成，该顺序由用户及SAP称为先验。
5.一种无线LAN(WLAN)用户终端，包含：
一多频发射机，经设置以发射请求发送信息，及在指定的独特空间端口与发射载体的组合上发射数据；
一多频接收机，经设置以在第一频率接收核准传输信号，及在指定的独特空间波束与接收载体的组合上接收数据；及
一频率控制器，可操作地耦合至多频接收机，利用接收的核准传输信号，以决定用户终端的指定的发射及指定的接收载体。
6.如权利要求5所述的WLAN用户终端，其特征在于该核准传输信号指示一伪随机发射及接收载体指定。
CN038159236A 2002-07-05 2003-07-02 执行无线切换的方法 Expired - Fee Related CN1666191B (zh)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US39415102P 2002-07-05 2002-07-05
US60/394,151 2002-07-05
US10/334,858 US20040004951A1 (en) 2002-07-05 2002-12-31 Method for performing wireless switching
US10/334,858 2002-12-31
PCT/US2003/020823 WO2004006117A1 (en) 2002-07-05 2003-07-02 Method for performing wireless switching

Related Child Applications (2)

Application Number Title Priority Date Filing Date
CN2007101527695A Division CN101132333B (zh) 2002-07-05 2003-07-02 执行无线切换的方法
CN201010143544A Division CN101772040A (zh) 2002-07-05 2003-07-02 执行无线切换的方法

Publications (2)

Publication Number Publication Date
CN1666191A CN1666191A (zh) 2005-09-07
CN1666191B true CN1666191B (zh) 2010-04-28

Family

ID=30002848

Family Applications (3)

Application Number Title Priority Date Filing Date
CN2007101527695A Expired - Fee Related CN101132333B (zh) 2002-07-05 2003-07-02 执行无线切换的方法
CN038159236A Expired - Fee Related CN1666191B (zh) 2002-07-05 2003-07-02 执行无线切换的方法
CN201010143544A Pending CN101772040A (zh) 2002-07-05 2003-07-02 执行无线切换的方法

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CN2007101527695A Expired - Fee Related CN101132333B (zh) 2002-07-05 2003-07-02 执行无线切换的方法

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN201010143544A Pending CN101772040A (zh) 2002-07-05 2003-07-02 执行无线切换的方法

Country Status (18)

Country Link
US (5) US20040004951A1 (zh)
EP (2) EP1895716B1 (zh)
JP (5) JP2005532737A (zh)
KR (4) KR100973241B1 (zh)
CN (3) CN101132333B (zh)
AT (2) ATE538558T1 (zh)
AU (1) AU2003281428A1 (zh)
BR (1) BR0312546A (zh)
CA (3) CA2491631C (zh)
DE (1) DE60318322T2 (zh)
DK (1) DK1540504T3 (zh)
ES (1) ES2297180T3 (zh)
HK (2) HK1075723A1 (zh)
IL (2) IL166161A0 (zh)
MX (1) MXPA05000355A (zh)
NO (1) NO20050295L (zh)
TW (3) TWI276327B (zh)
WO (1) WO2004006117A1 (zh)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7272358B2 (en) * 2002-03-07 2007-09-18 Texas Instruments Incorporated Channelization scheme for wireless local area networks
US20040004951A1 (en) * 2002-07-05 2004-01-08 Interdigital Technology Corporation Method for performing wireless switching
US7231220B2 (en) * 2002-10-01 2007-06-12 Interdigital Technology Corporation Location based method and system for wireless mobile unit communication
TW589841B (en) * 2002-12-26 2004-06-01 Newsoft Technology Corp Method and system for improving transmission efficiency of wireless local area network
CN100559765C (zh) * 2003-04-09 2009-11-11 皇家飞利浦电子股份有限公司 连接通信网的子网的方法和桥接终端以及所述通信网
US6981599B2 (en) * 2003-08-08 2006-01-03 Westinghouse Air Brake Technologies Corporation High capacity shear mechanism
EP1530316A1 (en) * 2003-11-10 2005-05-11 Go Networks Improving the performance of a wireless packet data communication system
JP2006025065A (ja) * 2004-07-07 2006-01-26 Nec Corp ネットワーク、ネットワーク機器及びそれに用いるローカル認証方法並びにそのプログラム
US8504110B2 (en) * 2004-09-10 2013-08-06 Interdigital Technology Corporation Method and apparatus for transferring smart antenna capability information
TWI366356B (en) * 2004-09-10 2012-06-11 Interdigital Tech Corp Station for exchanging antenna capability in wireless communications and method thereof
US20060056345A1 (en) * 2004-09-10 2006-03-16 Interdigital Technology Corporation Method and system for supporting use of a smart antenna in a wireless local area network
CN100477851C (zh) * 2005-01-05 2009-04-08 国际商业机器公司 在无线局域网的两种通信模式之间进行切换的方法和系统
US20060203784A1 (en) * 2005-03-14 2006-09-14 International Business Machines Corporation Smart roaming to avoid time-outs during WLAN association
US8077683B2 (en) 2005-11-03 2011-12-13 Interdigital Technology Corporation Method and system for performing peer-to-peer communication between stations within a basic service set
KR100884803B1 (ko) 2007-05-09 2009-02-20 삼성전자주식회사 사용자 단말기의 포트 관리 방법 및 장치
JP5322621B2 (ja) * 2008-12-19 2013-10-23 京セラメディカル株式会社 ステント作製用口腔模型の製造装置およびステント作製用口腔模型の製造システム
US8660057B2 (en) 2010-08-26 2014-02-25 Golba, Llc Method and system for distributed communication
US9374613B2 (en) * 2011-12-07 2016-06-21 Verizon Patent And Licensing Inc. Media content flicking systems and methods
US9110951B2 (en) * 2013-09-16 2015-08-18 GM Global Technology Operations LLC Method and apparatus for isolating a fault in a controller area network
CN107889280B (zh) * 2014-08-22 2021-06-25 安科讯(福建)科技有限公司 自适应信号最佳路径选择的wlan室外无线接入点装置
US10626354B2 (en) 2016-04-29 2020-04-21 Novozymes A/S Detergent compositions and uses thereof
US10904784B2 (en) * 2016-06-15 2021-01-26 Qualcomm Incorporated Beam reporting and scheduling in multicarrier beamformed communications
DE102017125559A1 (de) 2017-11-01 2019-05-02 Henkel Ag & Co. Kgaa Reinigungszusammensetzungen, die dispersine ii enthalten
DE102017125560A1 (de) 2017-11-01 2019-05-02 Henkel Ag & Co. Kgaa Reinigungszusammensetzungen, die dispersine iii enthalten
DE102017125558A1 (de) 2017-11-01 2019-05-02 Henkel Ag & Co. Kgaa Reinigungszusammensetzungen, die dispersine i enthalten
CN112422245B (zh) * 2019-08-23 2022-04-22 华为技术有限公司 发送和接收指示的方法和装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1179250A (zh) * 1995-12-26 1998-04-15 Ntt移动通信网株式会社 移动无线数据通信系统

Family Cites Families (82)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5463400A (en) * 1994-06-30 1995-10-31 Motorola, Inc. Method and apparatus for synchronizing to a multi-beam satellite TDMA communication system
EP0709983B1 (en) * 1994-10-26 2001-06-06 International Business Machines Corporation Allocation method and apparatus for reusing network resources in a wireless communication system
US5726978A (en) * 1995-06-22 1998-03-10 Telefonaktiebolaget L M Ericsson Publ. Adaptive channel allocation in a frequency division multiplexed system
US5933420A (en) * 1996-04-30 1999-08-03 3Com Corporation Method and apparatus for assigning spectrum of a wireless local area network
US6215982B1 (en) * 1996-06-28 2001-04-10 Cisco Systems, Inc. Wireless communication method and device with auxiliary receiver for selecting different channels
CA2302289C (en) * 1996-08-29 2005-11-08 Gregory G. Raleigh Spatio-temporal processing for communication
US5905719A (en) 1996-09-19 1999-05-18 Bell Communications Research, Inc. Method and system for wireless internet access
JPH10126850A (ja) 1996-10-14 1998-05-15 Nippon Telegr & Teleph Corp <Ntt> 無線通信装置
US5933421A (en) * 1997-02-06 1999-08-03 At&T Wireless Services Inc. Method for frequency division duplex communications
WO1998037654A2 (en) * 1997-02-24 1998-08-27 At & T Wireless Services, Inc. Vertical adaptive antenna array for a discrete multitone spread spectrum communications system
US6584144B2 (en) * 1997-02-24 2003-06-24 At&T Wireless Services, Inc. Vertical adaptive antenna array for a discrete multitone spread spectrum communications system
US6359923B1 (en) * 1997-12-18 2002-03-19 At&T Wireless Services, Inc. Highly bandwidth efficient communications
US6052594A (en) * 1997-04-30 2000-04-18 At&T Corp. System and method for dynamically assigning channels for wireless packet communications
US7133380B1 (en) * 2000-01-11 2006-11-07 At&T Corp. System and method for selecting a transmission channel in a wireless communication system that includes an adaptive array
FI105063B (fi) * 1997-05-16 2000-05-31 Nokia Networks Oy Menetelmä lähetyssuunnan määrittämiseksi ja radiojärjestelmä
CA2260227C (en) * 1997-07-03 2002-08-27 Kabushiki Kaisha Toshiba Satellite broadcasting system
JP3045985B2 (ja) 1997-08-07 2000-05-29 インターナショナル・ビジネス・マシーンズ・コーポレイション 接続確立方法、通信方法、状態変化伝達方法、状態変化実行方法、無線装置、無線デバイス、及びコンピュータ
US6088337A (en) 1997-10-20 2000-07-11 Motorola, Inc. Method access point device and peripheral for providing space diversity in a time division duplex wireless system
US6377562B1 (en) * 1997-11-18 2002-04-23 Bell Atlantic Network Services, Inc. Wireless asymmetric local loop (WASL) communication
JPH11331125A (ja) * 1997-12-04 1999-11-30 Sanyo Electric Co Ltd 無線受信システム
US7430257B1 (en) * 1998-02-12 2008-09-30 Lot 41 Acquisition Foundation, Llc Multicarrier sub-layer for direct sequence channel and multiple-access coding
US6134261A (en) * 1998-03-05 2000-10-17 At&T Wireless Svcs. Inc FDD forward link beamforming method for a FDD communications system
US6112094A (en) * 1998-04-06 2000-08-29 Ericsson Inc. Orthogonal frequency hopping pattern re-use scheme
KR100394201B1 (ko) 1998-04-24 2003-08-06 샤프 가부시키가이샤 공간 분할 다중화 근거리 통신망
JP2933080B1 (ja) * 1998-04-24 1999-08-09 日本電気株式会社 チャープ信号による受信同期装置
US6259898B1 (en) * 1998-05-05 2001-07-10 Telxon Corporation Multi-communication access point
US6795424B1 (en) * 1998-06-30 2004-09-21 Tellabs Operations, Inc. Method and apparatus for interference suppression in orthogonal frequency division multiplexed (OFDM) wireless communication systems
US6345043B1 (en) * 1998-07-06 2002-02-05 National Datacomm Corporation Access scheme for a wireless LAN station to connect an access point
US6813254B1 (en) * 1998-11-25 2004-11-02 Lucent Technologies Inc. Methods and apparatus for wireless communication using code division duplex time-slotted CDMA
JP4450517B2 (ja) * 1999-04-20 2010-04-14 エヌエックスピー ビー ヴィ 携帯電話機におけるアンテナ方向の検出
IL149269A0 (en) * 1999-10-22 2002-11-10 Nextnet Wireless Inc Fixed ofdm wireless metropolitan area network utilizing consumer premise equipment having internal antenna
JP3464183B2 (ja) 1999-12-06 2003-11-05 日本電信電話株式会社 無線通信におけるチャネル切り替え方式
US6967937B1 (en) * 1999-12-17 2005-11-22 Cingular Wireless Ii, Llc Collision-free multiple access reservation scheme for multi-tone modulation links
US7058114B2 (en) * 2000-02-25 2006-06-06 Texas Instruments Incorporated Wireless device and method
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
US6952454B1 (en) * 2000-03-22 2005-10-04 Qualcomm, Incorporated Multiplexing of real time services and non-real time services for OFDM systems
US6859450B1 (en) * 2000-03-27 2005-02-22 Sharp Laboratories Of America, Inc. Method for coordinated collision avoidance in multi-transceiver frequency hopping wireless device
US20010030988A1 (en) * 2000-03-31 2001-10-18 Fry Terry L. Spread spectrum, frequency hopping transceiver with frequency discriminator quadrature filter
JP4380015B2 (ja) 2000-04-11 2009-12-09 ソニー株式会社 無線通信システム、無線基地局装置、無線移動局装置及び無線通信方法
JP3874991B2 (ja) * 2000-04-21 2007-01-31 株式会社東芝 無線基地局およびそのフレーム構成方法
US6647015B2 (en) * 2000-05-22 2003-11-11 Sarnoff Corporation Method and apparatus for providing a broadband, wireless, communications network
US7248841B2 (en) * 2000-06-13 2007-07-24 Agee Brian G Method and apparatus for optimization of wireless multipoint electromagnetic communication networks
KR20030026993A (ko) 2000-08-01 2003-04-03 이트론 인코포레이티드 주파수 불안정 신호의 고감도 트래킹 및 동기화 기능을가진 주파수 호핑 확산 스펙트럼 시스템
JP2002084221A (ja) 2000-09-06 2002-03-22 Ntt Docomo Inc 無線中継装置
US7158493B1 (en) 2000-09-29 2007-01-02 Arraycomm, Llc Radio communications system with a minimal broadcast channel
US6721569B1 (en) * 2000-09-29 2004-04-13 Nortel Networks Limited Dynamic sub-carrier assignment in OFDM systems
US7630346B2 (en) * 2000-09-29 2009-12-08 Intel Corporation Hopping on random access channels
JP3827931B2 (ja) 2000-09-29 2006-09-27 セイコーインスツル株式会社 無線通信システムにおける通信モード切換方法及び無線通信用携帯端末装置
US7072315B1 (en) * 2000-10-10 2006-07-04 Adaptix, Inc. Medium access control for orthogonal frequency-division multiple-access (OFDMA) cellular networks
US6870808B1 (en) * 2000-10-18 2005-03-22 Adaptix, Inc. Channel allocation in broadband orthogonal frequency-division multiple-access/space-division multiple-access networks
US7095754B2 (en) * 2000-11-03 2006-08-22 At&T Corp. Tiered contention multiple access (TCMA): a method for priority-based shared channel access
US20020086707A1 (en) * 2000-11-15 2002-07-04 Struhsaker Paul F. Wireless communication system using block filtering and fast equalization-demodulation and method of operation
US7230931B2 (en) * 2001-01-19 2007-06-12 Raze Technologies, Inc. Wireless access system using selectively adaptable beam forming in TDD frames and method of operation
CA2467700C (en) * 2000-11-15 2012-03-20 Ensemble Communications, Inc. Improved frame structure for a communication system using adaptive modulation
US6947748B2 (en) * 2000-12-15 2005-09-20 Adaptix, Inc. OFDMA with adaptive subcarrier-cluster configuration and selective loading
US7023798B2 (en) * 2000-12-27 2006-04-04 Wi-Lan, Inc. Adaptive call admission control for use in a wireless communication system
GB0102316D0 (en) * 2001-01-30 2001-03-14 Koninkl Philips Electronics Nv Radio communication system
KR100645427B1 (ko) * 2001-02-08 2006-11-14 삼성전자주식회사 채널 특성에 따라 불균등한 빔 폭을 형성하는 오에프디엠수신 장치와 이를 적용한 통신장치 및 방법
WO2002071770A1 (en) * 2001-03-06 2002-09-12 Beamreach Networks, Inc. Adaptive communications methods for multiple user packet radio wireless networks
US6940827B2 (en) * 2001-03-09 2005-09-06 Adaptix, Inc. Communication system using OFDM for one direction and DSSS for another direction
US6785513B1 (en) * 2001-04-05 2004-08-31 Cowave Networks, Inc. Method and system for clustered wireless networks
JP3801460B2 (ja) * 2001-04-19 2006-07-26 松下電器産業株式会社 基地局装置及び無線通信方法
US6611231B2 (en) * 2001-04-27 2003-08-26 Vivato, Inc. Wireless packet switched communication systems and networks using adaptively steered antenna arrays
US7177369B2 (en) * 2001-04-27 2007-02-13 Vivato, Inc. Multipath communication methods and apparatuses
DE60212761T2 (de) * 2001-05-29 2006-11-16 Kabushiki Kaisha Toshiba Gerät zur drahtlosen Kommunikation
JP3822530B2 (ja) 2001-05-29 2006-09-20 株式会社東芝 無線通信装置
US7167526B2 (en) * 2001-06-07 2007-01-23 National Univ. Of Singapore Wireless communication apparatus and method
GB0115937D0 (en) * 2001-06-29 2001-08-22 Koninkl Philips Electronics Nv Radio communication system
KR100438155B1 (ko) * 2001-08-21 2004-07-01 (주)지에스텔레텍 무선랜 네트워크 시스템 및 그 운용방법
US7139330B1 (en) * 2001-10-31 2006-11-21 Vixs Systems, Inc. System for signal mixing and method thereof
US20030125040A1 (en) * 2001-11-06 2003-07-03 Walton Jay R. Multiple-access multiple-input multiple-output (MIMO) communication system
US20030087645A1 (en) * 2001-11-08 2003-05-08 Kim Byoung-Jo J. Frequency assignment for multi-cell IEEE 802.11 wireless networks
US7346357B1 (en) * 2001-11-08 2008-03-18 At&T Corp. Frequency assignment for multi-cell IEEE 802.11 wireless networks
US7304939B2 (en) * 2001-12-03 2007-12-04 Nortel Networks Limited Communication using simultaneous orthogonal signals
US7573891B1 (en) * 2001-12-05 2009-08-11 Optimal Innovations, Inc. Hybrid fiber/conductor integrated communication networks
US7020110B2 (en) * 2002-01-08 2006-03-28 Qualcomm Incorporated Resource allocation for MIMO-OFDM communication systems
US6687492B1 (en) * 2002-03-01 2004-02-03 Cognio, Inc. System and method for antenna diversity using joint maximal ratio combining
US6785520B2 (en) * 2002-03-01 2004-08-31 Cognio, Inc. System and method for antenna diversity using equal power joint maximal ratio combining
US6850741B2 (en) * 2002-04-04 2005-02-01 Agency For Science, Technology And Research Method for selecting switched orthogonal beams for downlink diversity transmission
US9628231B2 (en) * 2002-05-14 2017-04-18 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US6999724B2 (en) * 2002-06-20 2006-02-14 Lucent Technologies Inc. Slowing the observed rate of channel fluctuations in a multiple antenna system
US20040004951A1 (en) * 2002-07-05 2004-01-08 Interdigital Technology Corporation Method for performing wireless switching

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1179250A (zh) * 1995-12-26 1998-04-15 Ntt移动通信网株式会社 移动无线数据通信系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
同上.

Also Published As

Publication number Publication date
TWI276327B (en) 2007-03-11
US10116421B2 (en) 2018-10-30
KR100973244B1 (ko) 2010-07-30
KR20090066333A (ko) 2009-06-23
JP2014030225A (ja) 2014-02-13
CA2869462C (en) 2019-10-29
DE60318322T2 (de) 2008-12-11
US11171749B2 (en) 2021-11-09
IL166161A0 (en) 2006-01-15
JP5010146B2 (ja) 2012-08-29
WO2004006117A1 (en) 2004-01-15
IL203390A0 (en) 2011-08-01
DK1540504T3 (da) 2008-05-13
CN1666191A (zh) 2005-09-07
JP2015046935A (ja) 2015-03-12
TW200721866A (en) 2007-06-01
BR0312546A (pt) 2005-04-19
CA2491631A1 (en) 2004-01-15
EP1895716B1 (en) 2011-12-21
JP2006166483A (ja) 2006-06-22
US20150071243A1 (en) 2015-03-12
ATE538558T1 (de) 2012-01-15
ES2297180T3 (es) 2008-05-01
EP1540504A4 (en) 2006-08-02
HK1113880A1 (en) 2008-10-17
TWI332782B (en) 2010-11-01
EP1540504B1 (en) 2007-12-26
MXPA05000355A (es) 2005-03-31
EP1895716A1 (en) 2008-03-05
KR20090120012A (ko) 2009-11-23
CA2689852A1 (en) 2004-01-15
AU2003281428A1 (en) 2004-01-23
ATE382168T1 (de) 2008-01-15
US9712294B2 (en) 2017-07-18
NO20050295L (no) 2005-01-19
DE60318322D1 (de) 2008-02-07
CN101132333B (zh) 2012-11-21
US20190068339A1 (en) 2019-02-28
JP2012090336A (ja) 2012-05-10
CA2869462A1 (en) 2004-01-15
TW200501779A (en) 2005-01-01
CN101132333A (zh) 2008-02-27
US20040004951A1 (en) 2004-01-08
KR101037645B1 (ko) 2011-05-30
CA2491631C (en) 2010-04-13
KR100973241B1 (ko) 2010-07-30
EP1540504A1 (en) 2005-06-15
TW200405697A (en) 2004-04-01
US20110222617A1 (en) 2011-09-15
US8917660B2 (en) 2014-12-23
KR20050016984A (ko) 2005-02-21
JP2005532737A (ja) 2005-10-27
KR20050101569A (ko) 2005-10-24
US20170302413A1 (en) 2017-10-19
CA2689852C (en) 2014-11-04
TWI357735B (en) 2012-02-01
HK1075723A1 (en) 2005-12-23
CN101772040A (zh) 2010-07-07

Similar Documents

Publication Publication Date Title
CN1666191B (zh) 执行无线切换的方法
CN113891493A (zh) 多链路设备的aid分配方法及相关装置
CN110784244B (zh) 一种数据传输方法及全双工Ad Hoc网络系统
JPH10507882A (ja) デジタルセルラ移動通信網のための基地局システム
Shigeno et al. Design and performance evaluation of new STMA/DA peer‐to‐peer MAC scheme for wireless LAN using directional antennas

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
REG Reference to a national code

Ref country code: HK

Ref legal event code: DE

Ref document number: 1075723

Country of ref document: HK

C14 Grant of patent or utility model
GR01 Patent grant
REG Reference to a national code

Ref country code: HK

Ref legal event code: GR

Ref document number: 1075723

Country of ref document: HK

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100428

Termination date: 20180702