TWM240733U - Radio network controller for multimedia broadcast and multicast services channel switching - Google Patents

Radio network controller for multimedia broadcast and multicast services channel switching Download PDF

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Publication number
TWM240733U
TWM240733U TW092214221U TW92214221U TWM240733U TW M240733 U TWM240733 U TW M240733U TW 092214221 U TW092214221 U TW 092214221U TW 92214221 U TW92214221 U TW 92214221U TW M240733 U TWM240733 U TW M240733U
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Taiwan
Prior art keywords
mbms
channel
shared
cell
data
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TW092214221U
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English (en)
Inventor
Stephen E Terry
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Interdigital Tech Corp
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Publication of TWM240733U publication Critical patent/TWM240733U/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/02Details
    • H04L12/16Arrangements for providing special services to substations
    • H04L12/18Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/189Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling
    • H04W72/1263Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/30Resource management for broadcast services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/12Access point controller devices
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18Service support devices; Network management devices
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/51Allocation or scheduling criteria for wireless resources based on terminal or device properties

Description

M240733 五、創作說明(1) 創作領域 曰本創作是大體來說是有關無線通訊系統,尤其本創作 疋有關在該系統中多媒體廣播及多播服務的頻道切換及排 創作背景 、•在無線通祝系統中使用多媒體廣播/多播服務() 的需求正在上升,對於特定的MBMS而言,網路中一個授予 ^胞元可此具有無、一個、或多個用戶、無線傳輸/接收 单元(WTRUs)使用該MBMS。當用戶在胞元間遷移時,一原 t可能具有一個或沒有使用該服務的用戶的胞元在稍後可 ^會有多個使用該服務的用戶,相反地,一個在一點具有 多個使用該服務的用戶在另一時間可能只有一個或沒有用 戶。 用戶的遷移會產生無線資源無效率的使用。如果只有 一個或很少的用戶在該胞元使用該MBMS,對用戶來說使用 專用頻道使用該服務是值得嚮往的,專用頻道可利用功率 $制及波束導向以減少用來使用MBMS之無線資源的數 苗1·. 〇 、然而’如果太多用戶在該胞元使用MBMS,則多個專用 頻道總計可能會用到相當大量的無線資源,在這種情形 下丄一個較理想的無線資源使用可能會是透過一個共有/ 共享頻道來發送MBMS資料給一群使用該MBMS的使用者。雖 然在該情形下使用波束導向和功率控制會受限制,但總頻
第5頁 >540 M240733 五、創作說明(2) 道數量的降 戶的數量改 擇在後來就 另一個 低可減 變,原 不是那 由用戶 在胞元 重新建 該 MBMS 情景通 當MBMS用戶 元的資訊以 MBMS傳輸, 而,類似的 裂載和有效資源的 時可能會比在另一 輸,因此,在該時 令人滿意,對於另 相同MBMS頻寬的資 傳輸做不同的排程 MBMS用戶在胞元間 不是在另一胞元的 可能漏失MBMS資料 因此,讓MBMS 〇 少無線 本不是 麼地理 遷移導 間移動 立 MBMS 用戶就 常不會 某種程 時間具 間讓該 一個在 源就不 以更有 移動時 傳輪之 或接收 具有較 貧源的使用。當在胞元中㈣駝用 共有/共享頻道就是專用頻道選 想了。 ^的潛在問題乃是MBMS的排程。 時’該用戶需要藉由接收自兩胞 服務’如果兩胞元同步化他們的 能在胞元間無間隙的移動,然 實現且會令人失望。在基於胞元 度時間間隙下,其中一胞元在某 有較多的有效資源以支援MBMS傳 胞元傳輸較大量的MBMS資料就叫 同一時間間隙的胞元而言,支援 會存在。因此,在胞元間替MBMS 效利用該資源就頗令人嚮往。當 ’用戶移動進入的新胞元其傳輸 前就是之後,因此,MBMS用戶就 無用多餘的MBMS資料。 佳資源利用就成為眾人渴求的 創作概述 一種無線網路控制器,係包含一輸入,其係被配置用 以接收一多媒體廣播/多媒體服務(MBMS)資料,一輸入, 係破配置用以接收一具有MBMS服務個體的無線電通信鏈路
M240733 五、創作說明(3) --- 之建立,該服務個體辨識該MBMS資料的—特定mms服務’ 以及一MBMS頻道切換裝置,係用以決定該MMS資料,就一 特定胞7L而言’是否應該被映像至一專用頻道或是一共 享/共用頻道,與映像該MBMS資料至該特定胞元之一決定 的頻道上,該決定的頻道係基於該特定胞元的多個使用 者。而MBMS頻道切換裝置更包含一輸出,係被配置用以依 據頻道決疋而產生一專用頻道或是一共享/此用頻道。 較佳實施例 雖然較佳實施例說明是結合第三代伙伴計晝(3Gpp)寬 頻分碼多工存取(W-CDMA)系統,但實施例也適$於任何使 用Μ B M S的無線糸統,之後的無線傳輸/接收單元(界τ r u)包 含但不限制於一用戶裝備、行動基地台、固定或行動用戶 單元、呼叫器或任何形式可在無線環境操作下的裝置。 第1圖是一用以讓MBMS頻道切換之流程圖。在一特定 胞元,使用該服務之WTRUs數量是由步驟20所決定或估 計,典型地,這資訊是未知的。使用在該胞元及/或其他 胞元資訊中WTRUs的數目,例如胞元狀態、有效的胞元資 源等等之類的資訊,是否使用專用頻道或共有/共享頻道 或兩者皆用的選擇,即步驟22。在頻道選擇決定之後,該 MBMS資料就會映至對應的頻道,即步雜24 ° —種可能接近 的方法以決定何種類型的頻道被使用即是一種門播測試, 如果WTRUs在胞元的數量低於某值,則使用專用頻道,該 專用頻道允許功率控制並且會利用傳输差異技術’這些技
5542 第7頁 M240733 五、創作說明(4) ^ 術預期當高資料速率的MBMS的傳輸產生時’會有效率地使 用可利用的資源。 如果WTRUs數量超出Η檻值,即使用共用/共享頻道, 例如一共享頻道、一高速共享頻道或一輔助共用控制實體 頻道(S-CCPCH)。一共享頻道或高速共享頻道能被用來同 時傳輸MBMS資料給多數個WTRUs,S-CCPCH則能被用來廣播 MBMS資料給多數個用戶,典型地,該共享/共用頻道就有 較低的無線資源效率。
在另一實施例中,使用一個兩門檻的方案。如果在胞 元中使用MBMS的WTRUs的數量低於第一個門檻值,即使用 專用頻道,如果數量在第一和第二門檻值之間,即使用共 旱或高速共享頻道,如果數量超過第二門檻值,即使用共 用頻道來廣播MBMS。 在某些狀況下,可能會較欲使用共享和專用兩種頻道 以支持MBMS。為了說明,很多使用的WTRUs可能會定位在 一起,例如在一列基地台,而少數或單— WTRU可能就在一 列基地台外,在此情況下,胞元資源最有效率的使用以支 援MBMS可能是分配一共享頻道給一列基地台上的WTRUs, 而分配一專用頻道給其他的WTRU,當在胞元中用戶的數量
改變,胞元狀態改變或頻道選擇會週期性的重複使用新資 訊,即步驟26。 、 第2圖是一用以執行頻道切換之較佳無線存取網路 (R A N)之圖示’邊r a N係由管理使用者服務的服務網路控制 器(S-RNC) 30以及管理胞元實體資源之控制無線網路^制
5^43 M240733 五、創作說明(5) ' 器(C-RNC) 34所管理,提供s_RNCs 30及C-RNC 34之間協 調以便RAN適當地操作之信號發出程序會被使用。 一頻道切換實體(MBMS頻道切換裝置36)決定該用哪個 頻道,例如專用、共享或共用,提供MBMS傳輸且其亦協調 WTRUs 40^40Ν (40)之MBMS接收,MBMS資料則透過B節點 38 被送往WTRUs 40。 ” 一頻道切換之較佳實施方式如下所述,一第一使用 MBMS之WTRU 40能自主地進入和離開胞元,其係有關M]gMS 服務之分佈及啟動狀態,當MBM首先為該第一WTRU 4〇或少 數在特定胞元的用戶建立時,專用頻道會隨著一辨識mbms 服務之獨特無線鏈路(RL)指示器而建立,一欲使用其他 MBMS之第二WTRU 40會具有一個不同的專用頻道分派給該 使用者,當該RL為每一用戶建立後,一獨特心…指示器回 從S-RNC 30發送信號至C-RNC 34,該MBMS指示器對每一提 供給該用戶之服務而言都是獨特的,該c —RNC 34維護一所 有對特定MBMS服務而言正在使用中的用戶之資料庫,且古亥 群組被認知為MBMS用戶群。 ' ~ 每一啟動之MBMS服務之資料會由核心網路28透過mbms 資料流分配給C-RNC 34 ’ 一獨特與每一MMS資料流相連的 辨識子允許該C-RNC 34以連接該資料與適當的用戶或用戶 群,^更該資料能合適地排定路由。根據特定_s服務之 啟動用戶數量及胞το狀態’該C-RNC 34將決定是否服務該 在專用或共享/共用頻道上傳輪。 ^ 既然個別用戶自動地進入或離開該胞元,專用和共用
5544 M240733 五、創作說明(6) J ί :a’ :切換即動態且可能在不間斷進行的傳輸時發生。 動悲切換能適用於下行通路共享頻道(DSCH), DSCH上送出以被與專用DSCH (C_DSCH)相關之、一 b 同時地被多數個與共用DSCH (C_DSCH)相關之 一。 對一特定的MMS來說,當僅有一個用戶或少數用戶在 内離開,對用戶來說DSCH將成$D-DSeH,a t
知_从田a批曰以 竹风馬υ ,萄與特定的MBMS 才關的用戶數κ杧加,為該MBMS用戶群將立 …當該第一 WTRU 40成為在胞元間為啟動,一卜⑽^將 =ί第二二二建立,MBMS傳輸可能就不需要連續處於啟動 狀悲^在DSCH上MBMS的傳輸會被指示給在相連專用頻道上 之该第一WTRU 40,這項指示可在傳輸時間間 上開啟或關閉。 、 j 土足 C-DSH也許實質上相同於D —DSCH,然而不同之處在 於,與位於MBMS使用者群組中之專用頻道有關之個人使用 者之DSCH傳送信號係為同步傳送,其允許〇以使用者群組 中的所有使用者能接收到共同的DSCH傳送。一指示器會隨 同MBMS傳送而發出信號,以指示〇化傳送使用於特用 者或是MBMS使用者群組中的一般使用者,以達成電力控制 技術之適當操作、傳送多元化、或任何其他獨特的實^傳 送特性。專用DSCH與一般DSCH之間的MBMS轉換係較WTRU40 來得清楚。 在另一貫施例中,頻道轉換係應用於高速DSCH(HS一 DSCH)上。使用HS-DSCH來取代DSCH之差異在於其並非於c_ RNC34之相關專用頻道上使用同步分配,其同步分配係使 第10頁 SS45 M240733 五、創作說明(7) 用B節點38之HS-DSCH控制頻道上。 在又一實施例中,轉換可以在不使用相關專用頻道 下’於專用實體頻道與一般實體頻道之間發生。專用頻道 與一般頻道之間的頻道轉換會明確地以信號通知每個使用 者。Ran第三層協定允許發送無線電幅至專用與一般頻道 之間的轉換之程序,信號發送係以發送轉換之無線電幅或 以發送傳送排程資訊的方式來執行。第3圖與第4圖係為允 _不同胞元與不同内胞元MBMS傳送來排入不同順序之流程 圖。,為了說明起見,假設一第一胞元能夠在一無線電幅内 傳送大量MBMS資料至WTRUs,而第二胞元不能,結果,在 弟胞元内之MBMS傳送可能超前第二胞元一或多個無線電 幅或TTIs。 為了說明位於胞元中之内胞元,一組使用者係定位於 一火車站中並接受一般dsch的服務,而另一位於同一個胞 兀中的使用者係處於火車站外並接受專用頻道或專用dsch 的服務’以充分利用電波形式及電力控制。根據負載 及其他因素,火車站WTRUs 40的傳送領先或落後WTRU外的 傳送,皆是令人滿意的。假如位於WTRUs外的使用者進入 火車站,最有可能令人滿意地轉換WTRU 4〇至一般DSCH, 並解除專用頻道。在這種情況下,外部訂㈣需要趕上 一般DSCH的傳送,或是允許該傳送趕上WTRU 40已接收到 的區段。 為了維持持續的服務分配並更有效率地使用無線電資 源,MBMS傳送較佳地係區段化或排程化,以讓使用者在任
第11頁 M240733
何情況下都能接收到MBMS服務傳送的 務傳送並不需要於使用者通道上之胞元此,MBMS服 且使用者也不需要等待與存在之MBMS服務= =, 化。 々1寻运進行同步 第3圖係為使用頻帶内區段資訊來控制内 間之=同MBMS傳送順序。跟隨MBMS傳送,區段資訊5 MBMS資料一起傳送,步驟42。該區段資訊典型地包含二【 段辨別器,以使每個接收WTRU皆能辨別其接收的^二。二 特定WTRU於MBMS傳送來源間移動時(胞元或轉換頻°道又之田 間),步驟44,WTRU能從新的MBMS來源接收區段,、^並重組 該傳送以復原所有的MBMS資料,步驟46。 ' 第5圖係為WRTU 40接收不同MBMS傳送之簡化方塊 圖。W R T U 4 0係使用一天線5 4來接收Μ B M S傳送。μ B M S接收 器56從不同傳送來源接收MBMS傳送,其中包含了頻帶内區 段資訊。一區段資訊回復裝置5 8係用以回復區段資訊。使 用分割資訊及接收MBMS區段,一MB MS分割重組裝置60係重 組區段以回復MBMS資料。 第4圖係為使用頻帶外傳送排程資訊來控制不同μ B M S 傳送順序之流程圖。WTRU從一特定來源接收MBMS傳送,步 驟48 qWTRU也接收頻帶外排程資訊,步驟50。當WTRU移動 至不同的來源,WTRU能從新的來源接收MBMS資料,並使用 該來源之頻帶外排程資料來重組MB MS接收區段,步驟52。 第6圖係為WRTU接收不同MBMS傳送之簡化方塊 圖。WTRU 40係使用一天線54來接收MBMS傳送。MBMS接收
5S4? 第12頁 M240733
五、創作說明(9) 一頻帶外同步資訊 。使用同步資訊及 重組區段以回復 器64係從不同傳送來源接收MBMS傳送。 裝置62係從多重傳送來源接收同步資訊 接收MBMS區段,MBMS分割重組裝置68係 MBMS資料。 第3圖及第4圖的方法皆允許位於胞位内的使用者在 用與一般頻道之間進行適當的轉換,而不需中斷或延遲 MBMS傳送。此外,即使新胞元與舊胞元之間的傳送順序不 同,進入胞元的WTRU仍能持續接收MBMS的服務。一旦Mbms 傳送資料被接收,WRTU將依據頻帶内區段及/或頻帶外傳 送排程資訊來記錄資訊。 由於應用了頻帶内分割或頻帶外排程,遺失或失敗的 傳送能有效率地藉由WTRU於再傳送時的使用而被回 復。RNC MBMS再傳送排程也能藉由考慮到WTRUs之轉換接 收而降低。進一步地說,假如RNC知道所有使用者皆接收 到一特定MBMS區段,該區段之再傳送就能被預防。
第13頁 圖式簡單說明 第1圖 為一使MBMS頻道切換之流程圖。 第2圖-是一用以執行頻道切換之較佳無線存取網路(RAN) 訊的多重來源的MB MS之 第3圖為來自使用頻帶内區段資 協同接收流程圖。 ' 第4圖 為來自使用頻 協同接收流程圖。 帶外區段資訊的多重來源的MBMS之 第5圖 WRTU 〇 為用以接收使用頻帶内 區段資訊的MBMS資訊之一 第6圖 WRTU。 為用以接收使用頻 只$外同步資訊的MBMS資訊之一 元件符號說明 28 核心網路 3 4 控制無線網路控制 36 MBMS頻道切換裝置 401-40n WTRUs 56 MBMS接收器 6 0 MBMS分割重組袭置 64 MBMS接收器 ^ 30器(C〜RNC) 服務網路控制 裔(S〜RNC) 38 B節點 54 天線 586266
MBMS 刀則重組裝

Claims (1)

  1. M240733 六、申請專利範圍 ---- 1 一種無線網路控制器,係包含 一輸入’係被配置用以接收一多媒體廣播/多媒體服 務(MBMS)資料, 一,入’係被配置用以接收一具有MBMS服務個體的無 線電通信鏈路之建立,該服務個體辨識該MBMS資料的一 定MBMS服務,以及 ' 一MBMS頻道切換裝置,係用以決定該〇MS資料,就一 特定胞元而言,是否應該被映像至一專用頻道或是_共 享/共用頻道’與映像該MBMS資料至該特定胞元之一決定 的頻道上,該決定的頻道係基於該特定胞元的多個使用 者,且該MBMS頻道切換裝置係包含 一輸出’係被配置用以依據頻道決定而產生一專 用頻道或是一共享/共用頻道。
    5ί>50
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