TWI339034B - Closed loop transmit diversity of point to multipoint physical channels - Google Patents
Closed loop transmit diversity of point to multipoint physical channels Download PDFInfo
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- TWI339034B TWI339034B TW093110031A TW93110031A TWI339034B TW I339034 B TWI339034 B TW I339034B TW 093110031 A TW093110031 A TW 093110031A TW 93110031 A TW93110031 A TW 93110031A TW I339034 B TWI339034 B TW I339034B
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- 230000005540 biological transmission Effects 0.000 claims description 60
- 238000004891 communication Methods 0.000 claims description 7
- 230000004044 response Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 1
- 241000255925 Diptera Species 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0634—Antenna weights or vector/matrix coefficients
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- 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
-
- 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
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
1339034 九、發明說明: 【發明所屬之技術領域】 本發明基本上係關於一無線通信系統,特別是,本發明係關 於使用傳輸多樣化以在如此之系統中支持點對多點頻道。 【先前技術】 於無線通信系統中,對於使用點對多點服務之需求不斷的增 加,而在點對多點服務中,一個傳輸點係同時傳送資料至多個接 收點。點對多點服務之例子是多媒體廣播(multimediabr〇adcast) 及多重傳送服務(multicast service )。 無線通佗系統中一般使用之概念是傳輸多樣化。在傳輸多樣 化中,多個天線元件係被用以傳輸相同的服務信號,而藉由每一 個天線,所傳輸之信號之相位及振幅皆會加以調整,因此,整體 的傳輸係會被強迫朝向一所需之接收器,而在系統中之其他接收 器則自該服務傳輸中接收較少量或是沒有接收到任何傳輸能量。 對點對點服務而言,傳輸多樣化可被用以隔離使用者,並且據此 而增加整體之無線資源效能(ra(Ji〇 reS〇UrCe efJjCienCy )。 雖然傳輸多樣化可被用來讓無線資源之使用更為有效,但在 點對多點通信中應用傳輸多樣化是有問題的。接收點對多點通信 之使用者在地理上付出如此之多,以致於傳輸多樣化可能會降低 -些使用者所接枚之信號的品質,另外,來自多個使用者之相位 及振幅資訊需要加以處理,並且來自多個使用者的資訊可能會相 5 1339034 衝突而難以加以協調。然而,在某些情況下,傳輸多樣化技術卻 可提供較好的無線資源利用。據此,使用點對多點的方式之 多樣化具有令人滿意的技術。 、 【發明内容】 在一無線傳輸系統中,資料是從一傳輸點到多重接收點來傳 輸的。一傳輸天線陣列在一個傳輸點上具有多樣的天線元件。頻 道資訊係為了在每一個接收點之每一個天線元件而測量。天線的 調整係使崎量得的頻道資訊來蚊。從所有朗者被測量所得 之頻道資訊與決定每一個天線元件之加權係數相關聯。加權係數 到一點對多點傳輸係被應用優先於被每一個天線元件播放出去。 【實施方式】 雖然較佳實施例被描述與一第三代合夥關係裎序(3Gpp)寬 頻密碼分衫重存取系統(W_CDMA)相關,實補仍可應用 在使用點對乡轉輸之任何m⑨巾。赠,—無線傳輸/接收 單元(WTRU)包含但並*舰在—使用妓置、行動基地台、 固定或行動電話用戶單元、傳呼器或任何其他類型可以在一無線 環境下操作的裝置。 圖—係一基地台20以及一群WTRUs 22]至22M (22)接收一 點對夕點(PtM)服務使用傳輸或選擇傳輸多樣化之簡化圖。觸 頻道係破產生’例如藉由—PtM頻道產生器裝置%。當傳輸多樣 6 1339034 化被用於PtM頻道,一傳輸(xmjt)多樣化加權裝置28估計由 基地台傳輸陣列的母一天線元件38!至38N (38)所發射的ptM頻 道訊號的變化加權。 在PtM頻道訊號從無線介面通過,每一個WTRU 22接收一 復合的PtM頻道訊號,例如藉由使用一天線37l至37m。一 ptM 頻道估計裝置32!至32M (32)估計每一個PtM頻道訊號之傳輸變 化的頻道回應。頻道回應資料係提供至一傳輸(XMIT)多樣化相 位/振幅訊號裝置34!至34M (34)。傳輸多樣化相位/振幅訊號裳置籲 34決定傳輸陣列38所需的相位/振幅調整以允許由wtRU 22之更 好的PtM訊號接收。傳輸多樣化相位/振幅裝置34向基地台20發 出此資料的訊號,例如藉由一層1訊號使用一專用的上行鏈結實 際頻道或一層2/3訊息。典型地’在WTRU 22中之頻道估計測量 以及在基地接收傳遞的資料訊號之間的時間係被了解介於wtru 22以及基地台20之間。 在基地台20’一 WTRU相位/振幅收集裝置3〇收集來自關聯籲 於每一個PtM服務的所有WTRUs中已經傳訊的相位/振幅資料。 典型地,每一個P舰服務係分別以傳輸多樣化分析被處理。一 ptM 頻道加權裝置26使用累積的相位/振幅資料來調整傳輸多樣化加 權裝置28°PtM頻道加權裝置26可能亦決定傳輸多樣化在一無線 電組織或TTI基地要打開以及關上。 較佳地,傳輸多樣化加權裝置28決定一復合的加權向量用於 7 1339034 天線元件38。如果PtM服務之每一 WTRU 22之連結效能沒有比 當傳輸多樣化不使用的時候之連結效能更差,加權向量係被用於 PtM中。如果任何使用者在使用加權向量時將遭遇一連結效能的 降低’傳輸多樣化係不被採用。 在較佳實施例中,點對多點(PtM)傳輸之傳輸多樣化係選擇 性地被採’賴其他技術可驗制。—般地,當—高度相關 性(測量間的相似性)存在於接收WTRU相位/振幅資料存在之 間,傳輸多樣化加權向量必須被作調整。當較少相關性存在時,籲 傳輸多樣化被關上或不改變加權向量。 圖二係-選擇性的使用傳輸錢化之流。接收觸服務 之每- WTRU22收集PtlVU賣數,例如藉由完成一頻道估計於舰 服務上,步驟40。使用收集的PtM資料,wtru 22決定所需的 相位以及/或振幅調整以改善其PtM之接收,步騍 上傳此料至戎基地台,例如在一上行鏈結專用實際控制頻道藉 由層-傳訊或是藉由層Μ傳訊,步驟44。上傳的資料,如回饋籲 資料(FBI)位元,在較佳實施例中係為藉由资肋2〕所決定之 天線加權值’ _其他型式之上料可能被賴。基地台與從 所有WTRUs之上傳資料相關。 招關的上傳資料係被分析以決定是傳輸多樣化方案應該 被利用,步驟46。如果-方案不應該被利用,傳輪多樣化係被關 上,步驟48。如果傳輸多樣化方案應被使用,則作出―是否傳輸 g 1339034 〇線元件需要作加權_之決定,步驟5Q。如果加職被調整, 新的加權係被採用於陣列38,步驟52。如果加權不應被調整,則 先前加權應該被維持,步驟54。 -分析上傳轉之枝係―服綱戦。相_加權值係 與-門紅®互相比較。如果相_加雜猶範難,則傳輸 多樣化係何用。如果細加雜在範财,則不作調整。如果 相關加權只比範圍高,則一平均加權調整係被使用。 圖二係一 PtM傳輸多樣化之程序表現之完成說明。每一 籲 WTRU 22在PtM服務群中,決定相位/振幅在基地台傳輸陣列外 至56M上所需要作的調整。WTRU22決定陣列%至%之每一 天線元件70,至70N之加權係數。基地台2〇接收且處理所有wtru 之加權係數以及使用PtM頻道加權程序60製造每一天線元件7〇 之頻道加權值。對於PtM調變器/傳輸電路系統,PtM服務資料係 由一 PtM頻道產生器62所製造。PtM頻道資訊,對於較佳的3GPP W-CDMA系統’係使用一混合器64與一傳輸以及展頻及擾頻碼籲 混合。 每一天線元件70之傳輸以及展頻及擾頻PtM頻道係藉由一加 權裝置66!至66n (66)來處理。每一天線之決定的頻道加權值係 藉由加權裝置66被使用於傳輸以及展頻及擾頻PtM頻道。每一衡 量過的天線訊號係較佳地藉由一結合器681至681^ (68)與一參考 頻道訊號結合以促進WTRUs之頻道估計。每一 WTRU 22可使用 9 1339034 從一天線70傳送之參考頻道訊號來估計頻道回應與該天線70聯 合。每一結合的頻道訊號使用其相對應的天線元件70被發射至 WTRUs 22。 【圖式簡單說明】 圖一係一點對多點基地以及WTRU使用傳輸多樣化之簡化圖。 圖二係一選擇性傳輸多樣化之流程圖。 圖二係一 PtM傳輸多樣化完成之程序流程。 【主要元件符號說明】 37天線 66加權裴置
20基地台 22 WTRU 38天線元件 64混合器 68結合器 70天線元件 24頻道產生器 26 PTM頻道加 30 WTRU項位振幅收集裝置 34 XMIT多樣化相位/振幅傳訊敦置 36無線介面 28 XMIT多樣化加權裝置 32PTM頻道估計裝置 62PtM頻道產生器
Claims (1)
1339034 十、申請專利範圍: 一種在一無線通訊中用以提供傳輸多樣化服務到多重接收點的 基站,該基站包含: 複數個天線元件,配置以傳輸一點對多點(PtM)頻道訊號到 多重接收點; 一收集裝置,配置以從每一接收點收集每一天線元件之相位 與振幅資訊; 一加權處理裝置,配置以根據所收集的每一天線元件之相位馨 與振幅資訊來調整每一天線元件的加權值;以及 一加權裝置’配置以將調整的加權值施用於該點對多點(ptM) 頻道訊號;以及 其令’該加權裝置更配置以: 在該調整的加權值高於-門檀範圍的狀況時,該加權裝置將 調整的加權值施用於該點對多點(PtM)頻道訊號; 在該調整的加權值低於該範圍的狀況時,則無法傳輸多# 樣化; 在該調整的加權值在—門絲圍之⑽狀況時,·持先前 的加權值。 根據申請專利範圍第】項所述之基站,其令該相位與振 包含一頻道響應資訊。 、 3.根據申請專利範圍第!項所述之基站,其中該加權處理裝置配 置以使用累積的她資訊與累積陳幅資訊以總加權值。 11 1339034 根據申叫專利範圍第1項所述之基站,其中在每一接收點的 連結表現至少與響應不使用傳輸多樣化所獲得的連接表現一樣 好的狀況時’該加權裝置配置以施用該加權值。 5.根據申請專利範圍第1項所述之基站,其中,在提供傳輸多樣 化服務的情況下’在無接收點在連絲現巾產生衰減的狀況時, 該加權裝置提供傳輸多樣化。 6·種提供傳輸多樣化服務到多重接收點的基站,該基站包含: 複數個天線元件,配置以傳輸一點對多點(PtM)頻道訊號到 多重接收點; 用以收7K從母一接收點相關連的每一天線元件之相位與振幅 資訊的裝置; 用以根據收集的相位與振幅資訊決定每一天線元件之新頻道 加權值的裝置; 用以根據收集的相位與振幅資訊決定傳輸多樣化是否需要的 裝置; 傳輸多樣化在調整後的加權值低於一門檻範圍的狀況時用以 停止該傳輸多樣化的裝置; 在傳輸多樣化是需要的狀況時用以決定是否需要施用新頻道 加權值的裴置; 該新頻道加權值在調整後的加權值低於一門檻範圍的狀况時 用以施用新頻道加權值的裝置;以及 12 丄呀034 遠新頻道加權值在該調整後的加權值在一門梭範圍内的狀況 時用以維持絲頻道加權值的裝置。 根據申6月專利範圍第6項所述之基站,其中傳輸多樣化是否需 要X及疋否需要施加該新頻道加難係藉由比較該新頻道加權值 與該門檻範圍所決定。 8. 根射請專利範圍第7項所述之基站,其中,若騎頻道加權 值低於該門檻範圍,該傳輸多樣化是不需要的。
9. 根據中請專利範㈣7項所述之基站,其中,在該新頻道加權 值尚於該門檻範圍的狀況時,則需要施加該新加權值。 10. 根據申請專利範圍第7項所述之基站,其+,在該新頻道加權 值在該門檻範圍之内的狀況時’則施加該先前加權值。 其中該相位與振幅包含 11.根據申請專利範圍第6項所述之基站, 一頻道響應資訊。
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Applications Claiming Priority (1)
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US40219902P | 2002-08-07 | 2002-08-07 |
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TW200509707A TW200509707A (en) | 2005-03-01 |
TWI339034B true TWI339034B (en) | 2011-03-11 |
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TW092121434A TWI252644B (en) | 2002-08-07 | 2003-08-05 | Closed loop transmit diversity of point to multipoint physical channels |
TW092214220U TWM240732U (en) | 2002-08-07 | 2003-08-05 | Base station using closed loop transmit diversity of point to multipoint physical channels |
TW093110031A TWI339034B (en) | 2002-08-07 | 2003-08-05 | Closed loop transmit diversity of point to multipoint physical channels |
TW095128939A TWI334739B (en) | 2002-08-07 | 2003-08-05 | Closed loop transmit diversity of point to multipoint physical channels |
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TW092121434A TWI252644B (en) | 2002-08-07 | 2003-08-05 | Closed loop transmit diversity of point to multipoint physical channels |
TW092214220U TWM240732U (en) | 2002-08-07 | 2003-08-05 | Base station using closed loop transmit diversity of point to multipoint physical channels |
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TW095128939A TWI334739B (en) | 2002-08-07 | 2003-08-05 | Closed loop transmit diversity of point to multipoint physical channels |
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US (1) | US7181176B2 (zh) |
EP (1) | EP1527634A4 (zh) |
KR (3) | KR20040014326A (zh) |
CN (1) | CN2686249Y (zh) |
AR (1) | AR040815A1 (zh) |
AU (1) | AU2003261376A1 (zh) |
DE (1) | DE20312161U1 (zh) |
HK (1) | HK1057970A2 (zh) |
TW (4) | TWI252644B (zh) |
WO (1) | WO2004016006A1 (zh) |
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EP1931057A4 (en) * | 2005-09-28 | 2013-05-01 | Nec Corp | MOBILE UNIT, MOBILE COMMUNICATION SYSTEM, AND ANTENNA VERIFICATION METHOD |
EP2182650B1 (en) * | 2007-08-21 | 2014-12-17 | Fujitsu Limited | Mobile station and transmission diversity control method |
US8559374B2 (en) | 2009-02-20 | 2013-10-15 | Lg Electronics Inc. | Method and apparatus for data communication through a coordinated multi-point transmission |
US11569886B2 (en) * | 2019-04-01 | 2023-01-31 | Qualcomm Incorporated | Network-sensitive transmit diversity scheme |
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US5812935A (en) * | 1993-04-17 | 1998-09-22 | Hughes Electronics | Cellular system employing base station transmit diversity according to transmission quality level |
US5918154A (en) * | 1995-08-23 | 1999-06-29 | Pcs Wireless, Inc. | Communications systems employing antenna diversity |
FI105740B (fi) | 1995-09-29 | 2000-09-29 | Nokia Mobile Phones Ltd | Toimistoviestintäjärjestelmä |
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-
2003
- 2003-08-05 TW TW092121434A patent/TWI252644B/zh not_active IP Right Cessation
- 2003-08-05 TW TW092214220U patent/TWM240732U/zh not_active IP Right Cessation
- 2003-08-05 TW TW093110031A patent/TWI339034B/zh not_active IP Right Cessation
- 2003-08-05 TW TW095128939A patent/TWI334739B/zh not_active IP Right Cessation
- 2003-08-06 AU AU2003261376A patent/AU2003261376A1/en not_active Abandoned
- 2003-08-06 EP EP03784920A patent/EP1527634A4/en not_active Withdrawn
- 2003-08-06 WO PCT/US2003/024483 patent/WO2004016006A1/en not_active Application Discontinuation
- 2003-08-06 DE DE20312161U patent/DE20312161U1/de not_active Expired - Lifetime
- 2003-08-07 HK HK03105653A patent/HK1057970A2/xx not_active IP Right Cessation
- 2003-08-07 CN CNU032048637U patent/CN2686249Y/zh not_active Expired - Lifetime
- 2003-08-07 US US10/637,023 patent/US7181176B2/en not_active Expired - Fee Related
- 2003-08-07 AR AR20030102838A patent/AR040815A1/es active IP Right Grant
- 2003-08-07 KR KR1020030054653A patent/KR20040014326A/ko not_active Application Discontinuation
- 2003-08-11 KR KR20-2003-0025822U patent/KR200331916Y1/ko not_active IP Right Cessation
- 2003-10-23 KR KR1020030074319A patent/KR20040014373A/ko not_active Application Discontinuation
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AU2003261376A1 (en) | 2004-02-25 |
TW200412743A (en) | 2004-07-16 |
TWI334739B (en) | 2010-12-11 |
DE20312161U1 (de) | 2003-12-11 |
TW200509707A (en) | 2005-03-01 |
KR200331916Y1 (ko) | 2003-10-30 |
KR20040014326A (ko) | 2004-02-14 |
TWM240732U (en) | 2004-08-11 |
CN2686249Y (zh) | 2005-03-16 |
US7181176B2 (en) | 2007-02-20 |
TWI252644B (en) | 2006-04-01 |
WO2004016006A1 (en) | 2004-02-19 |
AR040815A1 (es) | 2005-04-20 |
TW200723905A (en) | 2007-06-16 |
US20040097200A1 (en) | 2004-05-20 |
EP1527634A4 (en) | 2010-08-25 |
EP1527634A1 (en) | 2005-05-04 |
KR20040014373A (ko) | 2004-02-14 |
HK1057970A2 (en) | 2004-04-08 |
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