TWI324892B - Point to multi-point services using shared channels in wireless communication systems - Google Patents

Point to multi-point services using shared channels in wireless communication systems Download PDF

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Publication number
TWI324892B
TWI324892B TW095115508A TW95115508A TWI324892B TW I324892 B TWI324892 B TW I324892B TW 095115508 A TW095115508 A TW 095115508A TW 95115508 A TW95115508 A TW 95115508A TW I324892 B TWI324892 B TW I324892B
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channel
user
point
users
service
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TW095115508A
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TW200711486A (en
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E Terry Stephen
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Interdigital Tech Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/185—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with management of multicast group membership
    • 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
    • H04W4/08—User group management
    • 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
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • 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
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70718—Particular systems or standards
    • H04B2201/70724—UMTS
    • 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
    • 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
    • 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
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
    • 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
    • H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Computer Security & Cryptography (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)

Description

九、發明說明： 【發明所屬之技術領域】 特別是本發明係關於 本發明一般係關於無線通訊系統 此種系統中的點對多點服務。 【先前技術】 笛]2愈希Ϊ使用ί無線通訊系統中的點對多點服務，如 弟1圖所不，在點對多點(PtM)，-種服務係自單一點，如基 地台ίο，送至多點，如多重使用者設備12rl 對 務的實例為多媒體廣播及群播服務。 ’ 在第二代夥伴專案（3GPP)提出系統，可被用於此種服 務的一個經提出頻道為轉送接取頻道（FACH；^該FACH為 一種下行共同傳輸頻道（TrCH)，其可由所有使用者接收。 該FACH TrCH藉由將其施用於次要共同控制實體頻道 (S-CCPCH)而被傳播。該S_CCPCH被傳送至所有胞元使用 者。 為限制由該S-CCPCH所使用的無線電資源，該|§_CCPCH 資料速度被限制。為說明用途，若高資料速度服務在該 S-CCPCH上被傳輸，則需要使用低資料冗餘來傳輸以達到高 資料速度。因該S-CCPCH係傳輸至整個胞元，其在某服務質 望（QOS)在該胞元周圍足以由使用者接收的功率位準下傳 輸。在此功率位準下傳播高資料速度服務會增加至其他使用者 的介面，減少系統容量，因胞元資源的效率不足使用，其為非 常不欲的。 此外’因該S-CCPCH及FACH的傳播本性，該S-CCPCH 及FACH所需的無線電資源為非常靜態的。因藉由層3發訊 技術所提供的頻道分配及在這些頻道的訊息係於相當低的速 度被提供，該S-CCPCH所使用的調變及編碼組（MCS)及傳 輸功率位準需為足夠的以在該胞元周圍維持某Q0S。該 S_CCPCH結構的靜態本性不允許這些參數的動態調整以進行 無線電資源的有效利用。此外，傳輸的排程亦於此緩慢速度進 行’其不允許此無線電資源的有效利用且不允許至每一個使用 者的資料流的有效多工。 另一種可被用於點對點(PtP)服務的頻道為下行丘享頻道 (DSCHs)。該DSCHs由多個使用者共享，在該DSQi至不 同使用者（使用者設備）的傳輸為時間共享。結果，該DSCHs 為時間共享的頻道。 •f 的每—個使肖者具上行及下行專屬控制頻 ^。这些控道允許該DSCHs的更有效無線源利用， g控制頻道允許每―個使用者在該DSCH傳輸的電力㈣ 屬頻道的值於尥々刀及第一射刀該第一部份指示該下行專 職傳輸的發生 則該下行Λ ί 傳細抛傳社使用者， ^下仃控制頻道具該TFCI組的第二部份 後’該傳輸會於後續傳輸時間間隔（TTI)發生 ::二監：傳4二用者“確的該_ 傳送，該而‘部傳:的會=在=專;= 點服允許錄㈣源蚊有效_，㈣輯
此至許錢用麵飾需要在該DSCH 1324892 的許多傳輸，其使用大量的無線電資源。 因此，希望在提供無線點對多點服務具更多彈性。 【發明内容】
在一無線通訊系統中傳輸一服務資料，一個指示被同步 地傳輸以由在該系統胞元的一組使用者接收，該使用者群組並 不包括該胞元的所有使用者。各群組使用者接收服務指示，各 群組使用者監測在下行共享頻道傳輸的服務辨識，該服務資料 於具服務辨識的下行共享頻道傳輸。各群組使用者偵測服務辨 識及接收下行共享頻道的服務資料。 【實施方式】 雖然該較佳具體實施例係以結合較佳的3GPP提出系統 敘述，它們可與其他使賴射點傳輸的無線電系統一起被使 用0
第2圖為較佳的共享頻道16及其附屬下行及上行專屬控 ，頻道14r14N的說明。雖然該較佳具體實施例使用下行及上 ^專屬?制頻道’在另一具體實施例中，在這些頻道上傳送的 資料可藉由其他裝置如共同實體控制頻道或層2/3訊號的1他 裝置傳送二一組使用者UE i 12ι、…、证；12j、…、证N'12n 要接收共旱服務16 ^每_個使用者的_種下行專屬控制頻道 =rl4N被用來建立該共享頻道及其他目的。共享頻道π係由 =地台10送出且由UEs 121-12>^群接收。UEs，如UEX 12x， ^在它們的專屬控制頻道14χ^_共享頻道分配指示及 接收該共享頻道16的資料。
第3圖為RNC 20/Β節點18及ues的其中一個，【正了 ^用於傳輸在該共享頻道傳送資料之簡化圖式。在RNC 瓜節點18,每一個下行專屬控制頻道(DDCC)產生器24r24N 7 (S > 1知的控制頻道訊號。一種多點同步裝置 25被用來在該使用者的DDCCs上同步化至屬於共同腦服 務的使用者族群之DSCH分配。對证 2 或天線陣列經由無線介面22射出後= _二2^34或天線陣列接收且由控制頻道接收器36處 理以回復該頻道的控制資料。 傳送。該共享頻道訊難制其天線34或天線 頻道接收器38使用該專屬控制頻道資料而被回復種 取該下行專屬頻道及/或共享頻道的頻道品 料’如接收訊號碼功率、相對介面、及字組錯誤率。 = Ϊ皮送至該就肅節點18。典型而言，此頻道品 f輸功率指令（TPC)、相位位移及振幅資料 以用於波束成型、及經傳送功率及介面的測量值。 相、^ίί該聰2〇/ B節點18的測量接收器30自該共享 ΪίίΪ ΐ”回復該頻道測量。—種功率控制裝置28使 #料以設定該共享頻道的功率位準。此外，一 置29可使用相位位移及振輻資料以設定該共享 成型。雖然可使用更長時間範圍，較佳為該功率位 準及波束成型在每個傳輸時間間隔（ΓΓΙ)被更新。 —，專翻道被連續保持，該已接收之的BLER被用來決 介面比（SIR)目標。基於該接收的經估計SIR，TPC 生^:當該DSCH被活化，所需電力係得自該專屬頻 ’厂典型上並不^全相同，因二者間的該见跋要求 $,丨=目/不同。對刪傳輸，該傳輸功率位準被設定以得 PtM傳輸的最差接收品質的朗者的所欲Q〇s。亦 °在該PtM細者族群内的使帛者，目它們的QoS要求 132.4892 因在此傳輸的物理限制而無法達到。 、對具多重子資料流的服務，各種子資料流的傳輸特性可 被個另’]處理。為說明用途，多媒體服務可具音聲、影像及内文 子資料流。每一個子資料流的Q0S可為不同使得不同傳輸屬 性可由每一個子資料流使用。此方法可得到更佳的資源效率， 每一個子資料流可在個別DSCH傳輸被個別處理而非傳輸每 一個子資料流以符合最高的Q0S子資料流要求。 第4圖為較佳無線電網路控制器(RNC) 42的簡化方塊圖 f :該，佳RNC 42具一種排程機構46，該排程機構46較佳 $被每一個TTI排程資料’雖然可使用較長的排程時 Ϊ接機構46接收要在該共享頻道資源傳輸的資料。該 之祕包括PtP及PtM服務的資料。該排程機構排程 ΐ 料。為排織資料，_程機構 ί ί 要求（包括胞元及每一個頻道的總功 丰要求及先束指向資料）。對每一個TTI，該 5^^^的最佳使用以排程該資料傳輸。為說明用: 延t = PtM服務傳輸可被延遲1 若？1接著，1的彈性= 1秒)崎例如應毫秒或 期間夫ΐ情況T ’f源被分配且在該時間 輪的頻道及定時。t ττΐ ΘΝ關於PtP及PtM傳 料延遲要求的更大能力，並維供及資 到該⑽要求並達變
9 S 者或，一個使用 化ΐϋϊptp使用者或舰使用者群的傳輸以最大 t Γ ί使用。因提供用於傳輸的資料具特定Q〇s要 的只體資源及頻道品質測量基於ττι A準變化，在此 “ΪίΪίί力改找意使转的數目及實體#源的整體 藉由減少停頓無線電資源的發生，每一個ΤΉ的較 =少在服務間的資源衝突，此外，該TTI排程允許舰傳 ^至附傳輸的快速變化且反之亦然。為說明用途，一種多媒 _服務經由PtM傳輸送至多個使用者，對一個特定ττι，僅一 =吏用者需要此傳輸且該排雜構46排織TTIS服務傳輸為 」认在下一個TTI ’多個使用者需要該服務傳輸且一種ptM 傳輸被排程。使用該較佳排程機構46，該ptp及ptM服務可 被分割及在多個不鄰近的TTI位置重新組合。此排程機構46 進一步增加無線電資源指定的彈性及產生更大的無線電資源 效率。 ，第5A、5B ' 5C、5D及5E圖為一種PtM服務的共享頻 道的可能分配之說明。在PtM使用者族群的每一個使用者， 使用者1至使用者Ν’的專屬控制頻道H1-14N，接收如第5A 圖所不的服務，控制資料被傳送。如在3Gpp FDD系統的第 5B圖所示，有一個晶片偏移，，D〇FF"被用來間隔使用者TT][s 的開，。如第5A圖及第5B圖所示，對ptM服務使用者族群 内的每一個使用者’一種服務傳輪指示（STI) 50被沿該專屬 控制資料傳送。該服務傳輸指示50指示服務資料會在該共享 頻道16上傳送。該較佳服務傳輸指示為在該專屬下行控制頻 道爆衝的TFCI的第二部份之存在，雖然不同指示器（如位元 或字元）可被使用。在設定時間期間後，該服務資料在該共享 1324892 毳 DSCH接收器66回復。一種使用者回饋傳送器68傳送頻道資 料’例如TPC及/或相位位移資料回到該B節點18。該B節 點18使用使用者回饋接收器62回復來自相關每一個ptM使 用者群的所有使用者之該頻道資料。 要在該DSCH傳送的每一個PtM使用者群之資料係由 DSCH產生器56產生。一種功率控制裝置58使用已接收的回 饋資料建立該DSCH或每一個DSCH束的傳輸功率位準。該 DSCH的束由波束操縱控制器6〇決定，其提供適當的大小及 權重值至該B節點天線陣列的天線7〇1至7知的每一個。 【圖式簡單說明】 第1圖為點對多點服務的說明。 第2圖為較佳分享頻道的說明。 第3圖為較佳的無線電網路控制節點及使用者設備的簡 化圖式。 第4圖為具較佳的分享頻道的調度機構之較佳無線電網路 控制器的簡化圖式。 第5A 5B 5C犯及5E圖為該分享頻道的較佳調度訊號的 說明。 第6圖為建立及傳輸在下行分享頻道上點對多點服務的較 佳訊號之說明。 第7圖為使用共享頻道的傳輸功率控制及光束指向之較佳 B-節點及使用者設備執行的簡化圖式。 13 1324892 【主要元件符號說明】 1-G 使用者族群 10 基地台 12、12r12a、12r12N 使用者設備 14r14N 、14x 14r14s，14„-14GN 專屬控制頻道(DDCC) 16、16】 、162 共享頻道（dsch) 22、64 無線發送介面 • 24r24N 控制頻道產生器 25 多點同步裝置 26 頻道產生器 28 功率控制裝置 29 傳輸分集裝置 30 測量接收器 32、34 、7〇i_7〇n、72 天線 • 36 控制頻道接收器 38 共享頻道接收器 40 共享頻道量測裝置 42 無線網路控制器（RNC) 46 排程機構 50 ' 5〇! ' 502 服務指示器（ST1) 52 ' 52! ' 522 服務ED (SID) 54r54G 族群ID (GID) 14 1324892 56 DSCH產生器 58 功率控制裝置 60 波束操縱控制器 62 使用者回饋接收器 66 使用者DSCH接受器 68 使用者回饋傳輸器 70、76 UTMS地面無線電接取網路(UTRAN)系統
€=¾ 15

Claims (1)

  1. 十、申請專利範園： h -種用於-Β節財㈣共享頻道以及波束成型以執行點 對多點(PtM)的方法，該方法包括： (a) 從一共旱頻道的複數使用者接收頻道資訊； (b) 使崎接㈣縣資訊來確錢共翔道的各波束的 一功率位準； (c) 使用所接_頻道資絲決定享頻道的波束 ;以及 ()使用天線陣列以所確定的功率位準在所決定的波束 ' 上同時傳送該共享頻道。 如U她®第1項所述的方法，其中該頻道資訊包括來 自各該等魏使用者的—路徑損失估計。 • *申明專利範圍第1項所述的方法，其中該頻道資訊包括來 自各該等複數制者的—外環功率指令。 如申崎專利範圍第1項所述的方法，其中該頻道資訊包括來 5自各轉魏賴相—_辨指令。 如申巧專利乾圍第1項所述的方法，其中該頻道資訊包括來 自各該等複數使用者的一位置。 6. ^申請專利範圍幻項所述的方法，其中決定各波束的一功 德準包括藉由-使用者來設定用於接收的一接收功率， 16 1324892
    - ό__________ 該使用者具有一基於頻道品質資訊的最差頻道品質。 7.如申請專利範圍第1項所述的方法，更包括： ⑹在每一傳輸時間間隔(ΤΤΙ)重複步驟⑻-(d)。 17
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