TWI321918B - Channel switching for support of multlmedia broadcast and multicast services - Google Patents

Channel switching for support of multlmedia broadcast and multicast services Download PDF

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Publication number
TWI321918B
TWI321918B TW093110028A TW93110028A TWI321918B TW I321918 B TWI321918 B TW I321918B TW 093110028 A TW093110028 A TW 093110028A TW 93110028 A TW93110028 A TW 93110028A TW I321918 B TWI321918 B TW I321918B
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mbms
wtru
segment
sources
transmission
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TW093110028A
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TW200503458A (en
Inventor
E Terry Stephen
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Interdigital Tech Corp
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Classifications

    • 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
    • H04W72/20Control 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
    • H04W72/12Wireless 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
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/51Allocation or scheduling criteria for wireless resources based on terminal or device properties

Description

1321918 五、發明說明(1) 發明所屬之技術領域 本發明概括而言是有關無線通訊系統,特別是,本發明 是有關在該系統中多媒體廣播及多播服務的頻道切換及排 程。 先前技術 在無線通訊系統中使用多媒體廣播/多播服務(MBMS)的 需求正在上升,對於特定的MBMS而言,網路中一個授予的 胞元可能具有無、一個、或多個的使用者、無線傳送/接 收單元(WTRUs),而使用該MBMS。當使用者在胞元間遷移 時’一原本可能具有一個或沒有使用該服務的使用者的胞 元在稍後可能會有多個使用該服務的使用者,相反地,一 個在一點具有多個使用該服務的使用者在另一時間可能只 有一個或沒有使用者。 使用者的遷移會產生無線資源無效率的使用。如果只有 一個或很少的使用者在該胞元使用該MBMS,對使用者來說 使用專用頻道來支援該服務是值得嚮往的,專用頻道可利 用功率控制及波束導向以減少用來支援MBMS之無線資源的 數量。 然而,如果太多使用者使用在該胞元中的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’ 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,
第6頁 1321918 五、發明說明(2) 但總頻道數量的降低可減少無線資源的使用。當在胞元中 MBMS使用者的數量改變,原本不是共有/共享頻道就是專 用頻道的選擇在後來就不是那麼地理想了。 另一個由使用者遷移所導致的潛在問題乃是MBMS的排 程。當一個MBMS使用者在胞元間移動時,該使用者需要藉 由接收自兩胞元的資訊以重新建立MBMS服務,如果兩胞元 同步化他們的MBMS傳送,該MBMS使用者就能在胞元間無間 隙的移動,然而,類似的情景通常不會實現且會令人失 望。在基於胞元裝載和有效資源的某種程度時間間隙下, 其中一胞元在某時可能會比在另一時間具有較多的有效資 源以支援MBMS傳送’因此,在該時間讓該胞元傳送較大量 的MBMS資料就令人滿意,對於另一個在同一時間間隙的胞 元而言’支援相同MBMS頻寬的資源並無法利用。因此,在 胞元間替MBMS傳送做不同的排程以更有效利用該資源就頗 令人渴望。當MBMS使用者在胞元間移動時,使用者移動進 入的新胞元其傳送不是在另一胞元的傳送之前就是之後, 因此,MBMS使用者就可能漏失MBMS資料或接收無用多餘的 MBMS資料。 ' 因此’讓MBMS具有較佳資源利用就成為眾人渴求的事。 發明内容 本案係包含一種無線存取網路與一種用以發送使用頻道 切換的多媒體廣播/多播服務(MBMS)的方法,該頻道切換 係介於專用與共有/共享頻道之間。本案亦包含使用於當
1321918 五、發明說明(3) 一無線傳送/接收裝置接收來自多個傳、 務時的MBMS接收排程。此來源係已不同运A ^源的—MMS服 MBMS服務資料。在一實施例中其使用敢-人序來傳送該 在另一實施例中則使用頻帶外同步資訊。内區段資訊’而 實施方式 雖然較佳實施例說明是結合第三代 分碼多工存取U-CDMA)系統,但實计晝(3GPP)寬頻 MBMS的無線系統,之後的無線傳送/接也適_用於任何使用 但不限制於一使用者裝備、行動基地早=Κυ)包含 者單元、呼叫器或任何形式可在I線产η固疋或订動使用 ^ η ^ …、綠&境操作下的裝置。 第一圖疋一用以讓MBMS頻道切換之、 元,使用該服務之WTRUS數量是由步驟2匕〇 θ 。在一特疋胞 Λ , 里疋田步驟2〇所決定或估計, :型地,it貝訊是已知的。使用在該胞元及/或其他胞元 二訊中WTRUs的數目,例如胞元狀態、可利用的胞元資源 專等之類的資訊,是否使用專用頻道或共有/乒享頻道或 兩者皆用的選擇,即步驟22。在頻道選擇決定之後,該 MBMS資料就會映像至對應的頻道,即步驟“。一種可能接 近的方法以決定何種類型的頻道被使用即是一種門檻測 °式’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送差異技術, 這些技術預期當高資料速率的〇1^的傳送產生時,會有效 率地使用可利用的資源。 如果WTRUs數量超出門檻值’即使用共通/共享頻道,例
第8頁 1321918 五、發明說明(6) 或同時地被多數個與共通DSCH (c—DSCH)相關之使用者接 收。對一特定的MBMS來說,當僅有一個使用者或少數使用 者在胞元内離開’對使用者或是多個使用者來說DSCH將成 為D-DSCH ’而當與特定的MBMS相關的使用者數量增加,為 該MBMS使用者群將建立c-DSCH。 當該第一WTRU 40成為在胞元間為啟動,一D-DSCH將為 該第一使用者建立,MBMS傳送可能就不需要連續處於啟動. 狀惡’在DSCH上MBMS的傳送會被指示給在相連專用頻道上 之該第一WTRU 40 ’這項指示可在傳送時間間隙(TTI)基礎 上開啟或關閉。 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MMS使用者群組中的
所有使用者能接收到共同的DSCH傳送。一指示會隨同MBMS 傳送而發出k號,以指示專用於特定使用者或是共通於使 用^群組中之使用者的MBMS傳送,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體傳送特 性。專用DSCH與共通DSCH之間的MBMS轉換係較WTRU40來得 清楚。 ' 在另—實施例中,頻道切換係應用於高速])SCH(HS-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 用B節點38之HS-DSCH控制頻道上。 在又一實施例中’切換可以在不使用相關專用頻道下,
第11頁 1321918 五、發明說明(7) 於專用實體頻道與共通實體頻道之間發生。專用頻道與共 通頻道之間的頻道切換會明確地發出信號給每個使用 者。RAN第二層協疋允許發送無線電幅至專用與共通頻道 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。 第二圖與第四圖係為允許不同胞元與不同胞元内❿…傳 送來排入不同順序之流程圖。為了說明起見,假設一第一 胞元此夠在一無線電幅内傳送大量MbmS資料至WTRUs,而 第一胞元不能,結果,在第一胞元内之傳送可能超前 第二胞元一或多個無線電幅或TTIs。 為了說明胞元内,在一胞元内部,一組使用者係可能位 於一火車站中並接受共通DSCH的服務,而在同一個胞元内 的其他使用者係處於火車站外並接受專用頻道或專用DSCH 的服務’以充分利用波束成形及電力控制。根據DSCH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 4〇至共通DSCH, 並解除專用頻道。在這種情況下,外部WTRU 4〇需要趕上 共通DSCH的傳送,或是允許該傳送趕±WTRU 4〇已接收到 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 何情況下都能接收到MBMS服務傳送的單元。因此,MBMS服 務傳送並不需要於使用者通道上之胞元進行再次初始化,
第12頁

Claims (1)

1321918------
六、申請專利範圍 1. 一種用以接收來自至少二來源之一多媒體廣播/多播服 務(MBMS)之無線傳送/接收單元(WTRU),該至少二來源具 有一不同時間同步,該WTRU包含: 用以接收來自該至少二來源之MBMS區段之裝置,該 MBMS區段具有區段資訊;以及 用以因應該區段資訊而結合來自該至少二來源之接收 MBMS區段以產生MBMS資料之裝置。 2. 如申請專利範圍第1項所述之WTRU,其中該結合裝置安 排該MBMS區段以產生該MBMS資料。
3. 如申請專利範圍第1項所述之WTRU,其中該至少二來源 係為至少二基地台。
第16頁 丄19 . j 军):丨〖比(史)土皆决只|
第7圖
第 頁 1321918 .圖® Ofi 19 Ο .、人.乂 j...___________J 步驟42 步驟44 步驟46 •個WTRU接收與MBMS資料一起的MBMS區段資訊 WTRU在MBMS傳送來源之間移動 V WTRU接收來自新的傳送來源之區段與 利用區段資訊來重組此區段 第3 步驟48--- WTRU接收來自一特定來源的MBMS傳送 > r 步驟50--- WTRU接收MBMS的頻帶外排程資訊 > f 步驟52--- 隨者WTRU移至不同的來源, WTRU接收來自新的來源的MBMS資料並使用該來源 的頻帶外排程資料,重組MBMS接收的區段 了1Q1R 丄 ^ 丄 C_ J _ _ίΙ_ L_ _N 丨·I I _ !--» |l --III — I ·. ' _ _ l,_ •"Μ ^ :日¢(¾正咎換頁 WTRU 40
第5圖
第6圖
TW093110028A 2002-08-07 2003-08-05 Channel switching for support of multlmedia broadcast and multicast services TWI321918B (en)

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US40216102P 2002-08-07 2002-08-07

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TWI321918B true TWI321918B (en) 2010-03-11

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ID=30116098

Family Applications (8)

Application Number Title Priority Date Filing Date
TW092214221U TWM240733U (en) 2002-08-07 2003-08-05 Radio network controller for multimedia broadcast and multicast services channel switching
TW100120265A TWI475829B (zh) 2002-08-07 2003-08-05 支援多媒體廣播及多播服務之頻道切換
TW095128942A TWI349452B (en) 2002-08-07 2003-08-05 Channel switching for support of multlmedia broadcast and multicast services
TW092214223U TWM240065U (en) 2002-08-07 2003-08-05 Wireless transmit/receive unit for multimedia broadcast and multicast services
TW093110028A TWI321918B (en) 2002-08-07 2003-08-05 Channel switching for support of multlmedia broadcast and multicast services
TW099105086A TWI455509B (zh) 2002-08-07 2003-08-05 支援多媒體廣播及多播服務之頻道切換
TW092121435A TWI259000B (en) 2002-08-07 2003-08-05 Channel switching for support of multimedia broadcast and multicast services
TW103144066A TWI544819B (zh) 2002-08-07 2003-08-05 支援多媒體廣播及多播服務之頻道切換

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Application Number Title Priority Date Filing Date
TW092214221U TWM240733U (en) 2002-08-07 2003-08-05 Radio network controller for multimedia broadcast and multicast services channel switching
TW100120265A TWI475829B (zh) 2002-08-07 2003-08-05 支援多媒體廣播及多播服務之頻道切換
TW095128942A TWI349452B (en) 2002-08-07 2003-08-05 Channel switching for support of multlmedia broadcast and multicast services
TW092214223U TWM240065U (en) 2002-08-07 2003-08-05 Wireless transmit/receive unit for multimedia broadcast and multicast services

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TW099105086A TWI455509B (zh) 2002-08-07 2003-08-05 支援多媒體廣播及多播服務之頻道切換
TW092121435A TWI259000B (en) 2002-08-07 2003-08-05 Channel switching for support of multimedia broadcast and multicast services
TW103144066A TWI544819B (zh) 2002-08-07 2003-08-05 支援多媒體廣播及多播服務之頻道切換

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EP (2) EP2579624B1 (zh)
JP (7) JP4444105B2 (zh)
KR (10) KR101313581B1 (zh)
CN (6) CN101527881B (zh)
AR (1) AR040814A1 (zh)
AU (1) AU2003254320B2 (zh)
BR (2) BR0313578A (zh)
CA (4) CA2666198C (zh)
DE (2) DE20312162U1 (zh)
ES (1) ES2633937T3 (zh)
GE (2) GEP20104904B (zh)
HK (6) HK1057974A2 (zh)
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IL (4) IL166558A (zh)
MX (1) MXPA05001512A (zh)
MY (3) MY137140A (zh)
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