TWI357735B - Method for performing wireless switching - Google Patents

Method for performing wireless switching Download PDF

Info

Publication number
TWI357735B
TWI357735B TW93105233A TW93105233A TWI357735B TW I357735 B TWI357735 B TW I357735B TW 93105233 A TW93105233 A TW 93105233A TW 93105233 A TW93105233 A TW 93105233A TW I357735 B TWI357735 B TW I357735B
Authority
TW
Taiwan
Prior art keywords
sap
user
users
frequency
carrier
Prior art date
Application number
TW93105233A
Other languages
English (en)
Other versions
TW200501779A (en
Inventor
Carlos Zuniga Juan
Joanne Hunkeler Teresa
Original Assignee
Interdigital Tech 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 Tech Corp filed Critical Interdigital Tech Corp
Publication of TW200501779A publication Critical patent/TW200501779A/zh
Application granted granted Critical
Publication of TWI357735B publication Critical patent/TWI357735B/zh

Links

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)

Description

1357735 六、發明說明： 【發明所屬之技術領域】 本發明關於與數帛戶連接之無線LAN祕⑽綱。特別關 於供避免衝突之WLAN系統之切換。 【先前技術】 WLAN系統利用無執照波段供無線通信。一無線 通仏系統可自-特定終端至—所欲目的地、相同基本服務系統 (BSS)内或基幹網路之另—終端，但始終在同一載波内。乳必 系統有二作龍式：專案及基礎結構。於專雜式巾，終端能以 多點對多财倾此通話。而於基本結翻式時，—存取點⑽ 係作為-基站以控綱戶間之傳輸，因而可提供—點對多點無線 網路。因為所有用戶均分享脱颜中之一相同媒體，基本結構模 式對於半繁忙至繁忙負載網路而言也變得更有效率。 、，在基本結構模式中，當發送資料至所欲目的地終端時，終端 百先與AP if話。AP於是橋路或路由資訊至所欲目的地。因此在 此模式中，WLAN通信系統之—Ap控制BSS或單元中之傳輪。 媒體存取控制(MAC)協定被限定協調分享該波段之肌顧用 戶之頻迢使用。此等MAC協定絲於避免用戶朋時存取頻道之 衝突。協定之效率以成功之避免衝突而衡量。 使用之二協定為CSMA/CA MAC及CSMA/CD以太網 協疋一tw疋可感測出其他傳輸之載波。以太網可以不同方式連 接i括以太通4路集線态及以太網開關。以太網網路集線器將 中央點之連接集中為一點至多點連接，而不影響性能。一以太網 1357735 開關在來自终端之包封每次到達時操作。該開關讀取目的地之地 址，瞭解其連接至何埠，及在二實體埠之間作成直接連接。該以 太網開關之優點為，MAC不能感測媒體中之任何用戶，與以太網 路集線器比較，因而經由衝突降低可能性及可改進輸出量而改善 性能。一以太網路集線器將接收之包封傳輸至所有用戶，即使僅 有一個接收者亦如此。該網路集線器不檢示地址資訊。以太網路 開關僅發出包封直接至預定之目騎，絲導致可用帶寬之更有 效利用。 -般WLAN AP無法同時_—個以上之載波頻率，因而引 起低協枝率，太_關已證明可大幅改善以太網協定之效率。 因此，當終端分享_時’需要―紋進鱗點至多點網路 之性能之方法。 【發明内容】 在-基本服務系贼包含場存取點(SAp)之單元，以傳輸及 :收'點至多點通信自及至各用戶之—種無線lan(wlm)系統 有魏辨可，_永久鮮指定之能力及動 機載波指定之能力，每—被指定一獨特载波頻率以隔離 ==信’以防止衝突。SAP之另-實施例利用波束形成以 長:供二間埠指定給複數個用戶。 【實施方式】 用以太網路切換原則於一存取點 成一切換存取點(SAP) 106。頻率 弟1A圖顯示一系統，其應 (AP) ’以操作多頻率，俾該Ap變 1357735 載波fl-β被認為SAP巾不料處理，自SAp，綱戶終端1〇1_1〇5 以控制方式具有集t之存取至鮮戴波邮。 如第1A圖所示’每一用戶終端1〇M〇5被指定一頻率載波 fl-f5 ’ SAP1G6錢力触及發縣—肺。為縣永久指定 載波fl-f5給每-用戶終端.1()5，可使用二種方法。在較佳實 知例中’理想疋但非必要，不永久指定戴波給用戶終端⑼·1〇5。 一非永久指定可避免指定給—不發射#料之—終端。#更多終端 較可用鮮多時’如—永久指定之醉終端而不使用該鮮時， 一有發射資料之終端可被防止指定頻率。 動怨載波指定DCA計劃可予應用，其中，用戶終端1〇u〇5 在、旱载波中發出睛求傳輸(RJS)，於是SAP以可以傳輸(CTS)回 答，指出該載波可用來供傳輸之用。 或者，可利用一跳頻計劃，其中’用戶終端1〇M〇5具有一偽 隨機順序以改變載波，由用戶終端⑼.及SApi〇6稱為先驗， 以便使二用戶終端同時利用相同載波之可能性最小。根據目前 8〇2.11b標準發展之較佳wlan，三載波供跳頻之用。但敝山 標準中，八載波供跳頻之用。無線切換系統1〇〇可利用dca及 跳頻或分別及組合使用。 第1B圖說明一較佳用戶終端及利用多頻率之SAp。sa 有-頻率指定裝置12G以指定鮮(頻率埠)闕戶終端1〇1携。 —多頻率接收機m接收自終端ι〇ι_ι〇5利用指定之頻率璋發出 y#料。-多頻率發射機116自—終端至另—終端利用目的地终 端之指定頻率發射資料。多頻率發射機116較佳亦發射指定至終 端101-105。-天線122或天線列用以發出及接收由SApi〇6之資 1357735 料於資料介面124上。 終端101-105有一多頻率接收機114以接收頻率指定，及在終 端之指定頻率上恢復發射之資料。一頻率控制器108利用接收之 指定頻率以控制終端101-105之發射及接收頻率。一多頻率發射機 110在指定頻率上發射資料。 第2A圖顯示無線切換之另一實施例，其指定每一用戶終端 201-205以空間埠而非特殊頻率如第2A圖所示，空間波束bi_b5 由波束形成建立，可用以作為埠以便將用戶終端2〇1_2〇5彼此隔 離。SAP206可辨認每一用戶終端201-205之目的地之地址，及將 波束與每一地址關連。SAP206能同時接收一個以上之波束。 第2B圖說明較佳用戶終端及利用空間波束之SAp。該SAp2〇6有 一波束控制益220以決定何一波束(空間埠)與一特別用戶有關。該 控制器220提供一波束形成發射機216及波束形成接收機218供 波束為訊之用，俾一適當空間埠用來供一指定之終端。一天線陣 列214用來在無線介面222上傳輸及接收資料。 終端201-205具有一波束形成接收機210，以接收利用天線陣 列212發射之資料。波束形成發射機2〇8利用天線陣列212發射 資料至SAP206。 x 雖然’第1A’1B’2a及2B圖中之系統構型顯示五細戶終 端’任何數目之用戶終端均可使用。其目的為示範而非限制系統 能力範圍。第认錢圖中之無線切換系統可分別使用或聯合使 用。為說用戶終端㈣G5可由抑波束及頻率之組合加 以區別。#及2A圖之無線切換系統可應用於包括以下系統， 但不限於，直接順序(DS)WLAN及正交頻率區分多工 6 1357735 (OFDM)WLAN 系统。 【圖式簡單說明】 第1A圖顯示具有頻率载波以太網路埠之一 wlaN之系統圖。 第1B圖顯示一簡化之用戶終端及利用頻率載波以太網路埠之切 換存取點之略圖。 第2A圖顯不具有空間波束以太網路埠之WLAN之系統
第2B 圖 之簡化圖 圖顯示用戶終端及利用空間波束以太網路埠之切換存取 點
【主要元件符號說明】 100無線切換系統 106、206切換存取點(SAp) 101-105、201-205 用戶終端 108頻率控制器 110、116多頻率發射機 114、118多頻率接收機 120頻率指定裝置 112、122 天線 124、222無線介面 208、216波束形成發射機 212、214天線陣列 210、218波束形成接收機 220波束控制器 7

Claims (1)

  1. 七、申請專利範圍： 1.種用以促進無線LAN( WLAN)系統的胞元或基本服務系統内 複數用戶間通信之切換存取點(SAp)，該切換存取點(SAp)包含： ' 一頻率指定裝置，用以指定頻率給複數用戶，使得一獨特載 波頻率係基於一非永久、動態或偽隨機載波指定而指定給各用戶； -波束控制if裝置’用以指定—觸空間波束給各該複數用 夕頻接收機，用以自該複數用戶接收資料，對各用戶如同 獨特空間波束與所指定頻率的一組合；以及 如 #頻發射機’用以將自一用戶所接收的資料發射至在猶 2波束與所指賴率的—組合上的另—用戶，然後透過該指定 裝置進行指定。 專利範圍第1項所述之SAP，其中該頻率指定褒置基於來 μ荨用戶之4求發咖quest_tG德d)信號以及來自該SAp之生 除^咏略send臟’峨[齡久、動誠波指定。’ 來第2項所述之SAP，射鮮概_、被組離 紅知除發送信號’以指示—指定給該等用戶之解。.、 ^如申請專概㈣2韻述之SAp，射該㈣魏 來發射清除發送信號，以指干展 》糸被'、且，忐 5如申、Χ :偽隨機載波指定至該等用戶。 申π專如圍弟4項所述之SAp 對該用戶及兮9ΛΡ而士失〇 茂卞仰久牧置係基於 沿改變載波二順序二而驗㈣Ο10之一順序’藉由該等用戶 找反之順序跳頻而做出偽隨機戴波指定。 6.如申請專利範圍第丨項所述之SAp 用波東形成处⑽帥波東。H皮束控—裝置係使 /π年〆月 >丨日修正替換頁 該無線LAN 切換存取點(SAP)及複數 絲H無線LANOVLAN)系統執行無線切換的方法， '、統具有於基本服務系統或胞元内之一 终端用戶，該方法包含： 在該SAP : 決定該複數終端用戶之傳輸狀態； 間之通信； 選擇指定至各該用戶終端之載波頻率， 以隔離該等用戶 選擇一獨特空間波束，其用以指定給各用戶欲端，以陰 離該等用戶間之通信； ^各用戶終^，以隔 自的终端用發戶送Γ組合獨特空間波東與載波頻率的指定至每一各 及 自各用戶終端接收資料； 發送接收的資料至來自該Sap之一 預期的用戶終端；以 根，用戶終端之傳輸狀態以重新選擇指定至各 η波頻率。 補娜7所述之方法，其中該載波頻率指定係為一動 j波才曰疋，由來自該用戶終端之請求發送㈣祕t〇__信號及 水自該SAP之清除發送信號而達成。 =申请專利範圍第8所述之方法，其中該清除發送信號係指示一 和定至該等用戶之頻率。 申請專娜㈣7所狀方法，射賴波鱗指定係為一 爲ik機載波指定。 11·如申請細娜H)所述之方法，其中該偽隨機载波指定係藉 1357735 > : 卜。年〖。月>\日修正替換頁 . 由該等用戶沿改變載波之一順序之跳頻而達成，對於該等用戶及 該SAP而言，該順序為一先驗(priori)。 12.如申請專利範圍第7所述之方法，其中該波束形成係用以產生 該空間波束。 1357735 [公告本丨 —--At /啤〃月 >丨日修正替換頁 Ί 發明專利說明書 — 十^說明書格式、順序，請勿任意更動’※記號部分請勿填寫） ※·申請案號：093105233 ※申+主 η .分‘7. $ 、 入Ίf义(2006.01) X甲D月日.3 ※…分類：⑽^ (2006.01) 毛月名稱·（中文/英文） ¥7, {,0〇τ〇Ό 執行無線切換之方法/ METHOD FOR PERFORMING WIRELESS SWITCHING 一、中文發明摘要： 一種無線LAN(WLAN)系統’用於在基本服務系統或胞元内複 數個用戶間之通信，包含一切換存取點(SAp)以傳輸及接受至及來 自用戶之點對多點通信。在SAp有複數個埠可供使用，每埠被指 定一獨特載波頻率，具非永久頻率指定之能力及動態或偽隨機載 波指定能力，可隔離用戶間之通信以防止衝突。SAP之另一實施 例利用波束形成以提供空間埠以指定給複數個用戶。 三、 英文發明摘要： A wireless LAN (WLAN) system for communications among a plurality of users within a basic service system or cell comprising a switching access point (SAP) for transmitting and receiving point-to-multipoint communications to and from the users. A plurality of ports are available at the SAP, each of which assigned to a unique carrier frequency for isolating. 四、 指定代表圖： (一) 本案指定代表圖為：第1A圖。 (二) 本代表圖之元件符號簡單說明： 1
TW93105233A 2002-07-05 2003-07-03 Method for performing wireless switching TWI357735B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US39415102P 2002-07-05 2002-07-05
US10/334,858 US20040004951A1 (en) 2002-07-05 2002-12-31 Method for performing wireless switching

Publications (2)

Publication Number Publication Date
TW200501779A TW200501779A (en) 2005-01-01
TWI357735B true TWI357735B (en) 2012-02-01

Family

ID=30002848

Family Applications (3)

Application Number Title Priority Date Filing Date
TW95124221A TWI332782B (en) 2002-07-05 2003-07-03 Method for performing wireless switching
TW93105233A TWI357735B (en) 2002-07-05 2003-07-03 Method for performing wireless switching
TW92118253A TWI276327B (en) 2002-07-05 2003-07-03 Wireless LAN (WLAN) system and WLAN user terminal

Family Applications Before (1)

Application Number Title Priority Date Filing Date
TW95124221A TWI332782B (en) 2002-07-05 2003-07-03 Method for performing wireless switching

Family Applications After (1)

Application Number Title Priority Date Filing Date
TW92118253A TWI276327B (en) 2002-07-05 2003-07-03 Wireless LAN (WLAN) system and WLAN user terminal

Country Status (18)

Country Link
US (5) US20040004951A1 (zh)
EP (2) EP1895716B1 (zh)
JP (5) JP2005532737A (zh)
KR (4) KR20090066333A (zh)
CN (3) CN1666191B (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) TWI332782B (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
US7016673B2 (en) * 2002-10-01 2006-03-21 Interdigital Technology Corporation Wireless communication method and system with controlled WTRU peer-to-peer communications
TW589841B (en) * 2002-12-26 2004-06-01 Newsoft Technology Corp Method and system for improving transmission efficiency of wireless local area network
US9089004B2 (en) * 2003-04-09 2015-07-21 Koninklijke Philips N.V. Network with subnets being connectable via bridge terminals
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
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
EP3576310B1 (en) * 2004-09-10 2023-03-22 InterDigital Technology Corporation Implementing a smart antenna in a wireless local area network
US8504110B2 (en) * 2004-09-10 2013-08-06 Interdigital Technology Corporation Method and apparatus for transferring smart antenna capability information
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
CN107889281B (zh) * 2014-08-22 2021-06-08 安科讯(福建)科技有限公司 基于lte网络的wlan室外无线接入点实现方法
WO2017186943A1 (en) 2016-04-29 2017-11-02 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
DE102017125558A1 (de) 2017-11-01 2019-05-02 Henkel Ag & Co. Kgaa Reinigungszusammensetzungen, die dispersine i enthalten
DE102017125560A1 (de) 2017-11-01 2019-05-02 Henkel Ag & Co. Kgaa Reinigungszusammensetzungen, die dispersine iii 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

Family Cites Families (83)

* 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
DE69427404T2 (de) * 1994-10-26 2001-11-08 International Business Machines Corp., Armonk Zuordnungsverfahren und Vorrichtung zur Wiederverwendung von Netzressourcen in einem drahtlosen Kommunikationssystem
US5726978A (en) * 1995-06-22 1998-03-10 Telefonaktiebolaget L M Ericsson Publ. Adaptive channel allocation in a frequency division multiplexed system
AU714005B2 (en) * 1995-12-26 1999-12-16 Ntt Mobile Communications Network, Inc. Mobile wireless data communications 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
AU4238697A (en) * 1996-08-29 1998-03-19 Cisco Technology, Inc. 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
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
US6052594A (en) * 1997-04-30 2000-04-18 At&T Corp. System and method for dynamically assigning channels for wireless packet communications
FI105063B (fi) * 1997-05-16 2000-05-31 Nokia Networks Oy Menetelmä lähetyssuunnan määrittämiseksi ja radiojärjestelmä
KR100347409B1 (ko) * 1997-07-03 2002-08-03 가부시끼가이샤 도시바 위성 방송 시스템
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
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
JP3969562B2 (ja) 1998-04-24 2007-09-05 シャープ株式会社 空間分割多重全２重ローカルエリアネットワーク
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
KR100707294B1 (ko) 1999-04-20 2007-04-16 코닌클리케 필립스 일렉트로닉스 엔.브이. 통신 시스템 및 무선국, 제어 가능 구조를 제어하는 방법 및 이러한 통신 시스템을 사용하기 위한 연산 방법
CN1819537A (zh) * 1999-10-22 2006-08-16 耐克斯特奈特无线公司 利用具有内部天线的cpe的固定ofdm无线大城市区通信网
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
US6952454B1 (en) * 2000-03-22 2005-10-04 Qualcomm, Incorporated Multiplexing of real time services and non-real time services for OFDM systems
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
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
BR0112854A (pt) 2000-08-01 2003-08-26 Itron Inc Sistema de comunicação de espectro espalhado sem fio para transmitir dados
JP2002084221A (ja) 2000-09-06 2002-03-22 Ntt Docomo Inc 無線中継装置
US6721569B1 (en) * 2000-09-29 2004-04-13 Nortel Networks Limited Dynamic sub-carrier assignment in OFDM systems
US7158493B1 (en) 2000-09-29 2007-01-02 Arraycomm, Llc Radio communications system with a minimal broadcast channel
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
US7630346B2 (en) * 2000-09-29 2009-12-08 Intel Corporation Hopping on random access channels
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
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
WO2002041520A2 (en) * 2000-11-15 2002-05-23 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
WO2002052875A2 (en) * 2000-12-27 2002-07-04 Ensemble Communications, Inc. Adaptive call admission control for use in a wireless communication system
US7075967B2 (en) * 2001-01-19 2006-07-11 Raze Technologies, Inc. Wireless communication system using block filtering and fast equalization-demodulation and method of operation
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
JP3822530B2 (ja) 2001-05-29 2006-09-20 株式会社東芝 無線通信装置
DE60212761T2 (de) * 2001-05-29 2006-11-16 Kabushiki Kaisha Toshiba Gerät zur drahtlosen Kommunikation
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

Also Published As

Publication number Publication date
AU2003281428A1 (en) 2004-01-23
ATE538558T1 (de) 2012-01-15
CN1666191A (zh) 2005-09-07
CN1666191B (zh) 2010-04-28
TW200721866A (en) 2007-06-01
DE60318322D1 (de) 2008-02-07
CA2689852C (en) 2014-11-04
EP1895716A1 (en) 2008-03-05
KR20050016984A (ko) 2005-02-21
CN101132333A (zh) 2008-02-27
ATE382168T1 (de) 2008-01-15
KR100973241B1 (ko) 2010-07-30
TW200501779A (en) 2005-01-01
US11171749B2 (en) 2021-11-09
BR0312546A (pt) 2005-04-19
WO2004006117A1 (en) 2004-01-15
DE60318322T2 (de) 2008-12-11
CN101772040A (zh) 2010-07-07
HK1075723A1 (en) 2005-12-23
US8917660B2 (en) 2014-12-23
EP1895716B1 (en) 2011-12-21
US20110222617A1 (en) 2011-09-15
JP2005532737A (ja) 2005-10-27
HK1113880A1 (en) 2008-10-17
JP2014030225A (ja) 2014-02-13
TWI332782B (en) 2010-11-01
TWI276327B (en) 2007-03-11
DK1540504T3 (da) 2008-05-13
US10116421B2 (en) 2018-10-30
EP1540504B1 (en) 2007-12-26
ES2297180T3 (es) 2008-05-01
IL166161A0 (en) 2006-01-15
EP1540504A1 (en) 2005-06-15
US20150071243A1 (en) 2015-03-12
US9712294B2 (en) 2017-07-18
US20040004951A1 (en) 2004-01-08
KR20090066333A (ko) 2009-06-23
CA2869462C (en) 2019-10-29
JP5010146B2 (ja) 2012-08-29
MXPA05000355A (es) 2005-03-31
TW200405697A (en) 2004-04-01
KR20050101569A (ko) 2005-10-24
US20170302413A1 (en) 2017-10-19
IL203390A0 (en) 2011-08-01
CA2869462A1 (en) 2004-01-15
CA2689852A1 (en) 2004-01-15
KR101037645B1 (ko) 2011-05-30
JP2006166483A (ja) 2006-06-22
CA2491631A1 (en) 2004-01-15
NO20050295L (no) 2005-01-19
KR100973244B1 (ko) 2010-07-30
JP2012090336A (ja) 2012-05-10
KR20090120012A (ko) 2009-11-23
US20190068339A1 (en) 2019-02-28
CN101132333B (zh) 2012-11-21
EP1540504A4 (en) 2006-08-02
JP2015046935A (ja) 2015-03-12
CA2491631C (en) 2010-04-13

Similar Documents

Publication Publication Date Title
TWI357735B (en) Method for performing wireless switching
KR101240219B1 (ko) 무선 네트워크에서 노드들 사이에서의 통신을 위한 방법
JP2005532737A5 (zh)
Nakagawa et al. Multi-channel ad-hoc wireless local area network
CN118524582A (zh) 多链路通信方法及装置

Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees