TWI380635B - System for permitting control of the purging of a node b by the serving radio network controller - Google Patents

System for permitting control of the purging of a node b by the serving radio network controller Download PDF

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TWI380635B
TWI380635B TW098118282A TW98118282A TWI380635B TW I380635 B TWI380635 B TW I380635B TW 098118282 A TW098118282 A TW 098118282A TW 98118282 A TW98118282 A TW 98118282A TW I380635 B TWI380635 B TW I380635B
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node
communication system
wireless communication
clear
buffer
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TW098118282A
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TW201008176A (en
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Stephen E Terry
Yi Ju Chao
James M Miller
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Interdigital Tech Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1809—Selective-repeat protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/06—Generation of reports
    • H04L43/065—Generation of reports related to network devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/30—Flow control; Congestion control in combination with information about buffer occupancy at either end or at transit nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/32—Flow control; Congestion control by discarding or delaying data units, e.g. packets or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/34—Flow control; Congestion control ensuring sequence integrity, e.g. using sequence numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/90—Buffering arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0247—Traffic management, e.g. flow control or congestion control based on conditions of the access network or the infrastructure network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H04W28/12—Flow control between communication endpoints using signalling between network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H04W28/14—Flow control between communication endpoints using intermediate storage
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • 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
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/04—Registration at HLR or HSS [Home Subscriber Server]
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0097—Relays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external 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
    • H04W88/12—Access point controller devices

Description

1380635 六、發明說明： 【發明所屬之技術領域】 本發明係關於無線電通訊的領域’更特定言之，本發明係 關於藉由提供伺服無線電網路控制器的允許B節點之清除控制 之糸統及方法。 ,' 【先前技術】 第二代（3G)通用地面無線電存取網路（utmn)包括呼 籲乡無線電網雜槪（RNCs)，每—個練電網路控制器私 至:或更多B節點，每—個b節點包括—或更多服務一或更多 的基地台’該B節點必然與—或更多制者設備（版）通 -裡糸統，其包括頻分雙
:括冰 ▲ '…人一、1以以/久吋为、雙工(TDI 、工’ /、型上使用該RNC以分佈（亦即，緩衝及調度） = 而’對3G蜂寫系統的高速頻道，資料係由該 =刀佈°例如’這些高速頻道的其中-個為高速下行分享頻; (HS-DSCH)。因資料由該B節點 证1- .需先緩衝在齡節點的資料。伸⑽輸至該证則 合阳^許録該B節點緩衝㈣料再有⑽案例，且盆.存>?
Hs•臟就魏（由以 ，，舊的資料，，⑽'，在娜目===;間切換 輸至該UE的資料）在該Hs:Ci^元^= π 自該緩衝^清除此¥資料及停止此資 料的傳輸’因此作法節魏衝資源及無線電連結資浑。 第二個案例係關於無線電連結控制器（RLC)層。該RLC 無線電網路控制器（糖c).及該证皆為對等實體， 在當該RLC點_齡纽，頭虹重新奴其本身 失效的原因為因情況而異的且此種原因不在本發 不重新設定其本身，則先前在該B 衝的貝枓不再為有用的因該贴重新併發及重新開始傳 衝的轉僅料起傳輸延遲及不必要的無線電資源之 使用，右被傳輸，此資料只會由該1C對等實體捨棄。 次叔第二個案例係關於藉由該咖在確認應答模式（AM)的 序傳送。該施贴的要求為確認通訊協^資料單位 的依序傳送發生。該虹。使用一種伴隨每-個贿 的^ (SN)以確認、PDUs的依序傳送至較高層。當有失序傳 ^ (亦即，當找不到PDU時）時，在該证的紅傳送一個狀 If，至其在該B節點的對等實體，要求該失聯的pDUS ^ 輸’一旦接到該狀態報告pDU，在該RNC的該對等實 體重新傳輸該失聯的PDU之複本。 、 基於許多理由，高度希望已重新傳輸的pDUs儘可能快速 接收侧（亦即’該UE)的該j^C。首先，因依序傳送的要 求，該失聯的PDU會防止後續的PDUs向前送至較高層，第二， 該^的緩衝尺寸需足夠大以容納重新傳輸的延遲，並仍維持有 六的負料速率延遲愈長，該证的緩衝器尺寸必須愈大以容許 該UE缓衝停滞_ pDUs及持續的資料接收直到正確的序列 PD=可被向別送至較高層。雜大的緩衝尺寸造成哪的增加 硬體成本。此為非常不欲的。 第1圖為先前技藝系統，其包括一種RNC、一種B節點、 1380635 一種UE及它們的附屬緩衝器。在此先前技藝系統，具SN=3的 種PDU未被該UE成功接收。所以，在該UE的該rlc要求 在該RNC的其對等rlc層重新傳輸。同時，具SNs=6_9的pDUs 在，B，點緩衝，且具SNs=4及5的PDUs在該征緩衝。應 注意的是雖然第1圖僅顯示被緩衝的許多PDUs，事實上許多更 多的PDUs (例如100或更多）及自其他rlc對等的pDUs 被緩衝。 μ如第2圖所示，具SN=3的該PDU之重新傳輸必須在該B 即點緩衝的行之末端等待，且僅在具SNs=6_9的pDUs被傳輸後 才被傳輸。在該UE # PDUs無法向前送至較高層直到所有pDUs 依^被接收。在此情況下，具SN=3的該咖停止後續的pDUs 向前送至較高層（亦即，SNs=4_9)，假設所有該pDUs被成功 傳輸。注意此實例僅反映10個PDUs，但是在正常操作中數百 個PDUs可在重新傳輸的資料PDUs之前被調度 的 延遲及資料緩衝議題惡化。 文便得鍋 上述案例儘為許多實例的少數，其中在該B節點之資 除會產生無線電通信系統的更有效率操作。 ^ ίίί—齡統及方法，由此該可控财該B節點緩 ===除。在許多情況下，此緩衝資料_除 【發明内容】 本發明包括-種允許㈣控制在削節點緩衝的資料的清 除之糸統及方法。清除指令刪除伴隨特定证 料，基於树RNC發生㈣定㈣清 4·=^ 定清除特定现的所有資料，在一或許多使用者事^3= 1380635 列上或在-^更多在該B節關邏輯通道的資料，碰該臟^ 通知該Β，·點清除傳輸資料的需求，該清除指令可包括-種架 構=使B節點在接收由該腿:起始的現有(先前技藝)步驟以清 除資料i可包括-種全新的步驟’其特定地要求B節點的資料 清除或是可停留在财步驟喊是以顯示B節點清除要求的位 元或信息元件的資料傳輸。 【實施方式】 本發明較佳具體實施例係參考圖式敘述之，其中相同數字 表示相同元件。 f考第3A圖，根據本發明該讀^控制在該B節點内的清 除功能之方法10被示出。該職^等待伴隨特定顶的該清除，, 觸發事件（步驟12)的發生，例如此觸發事件可包括一種饲服 fS DSCH胞元變化、一種虹匸重新設定或自該证的虹c狀 ^報告之產生以要求某些PDUs之重新傳輸。雖然這些為觸發事 it個實例’熟知本縣者應清楚地認知任何魏可被用做觸 以α除該Β節點，若該β節點的清除可產生對夺统摔 ^益。因此，之後所敘述的本發财法及系統應不僅 該二個已列舉的觸發事件。 、
祕ί該清除觸發事件而定，伴隨证的所有資料，伴隨該UE 貧料流的資料或伴隨該证的一或更多邏輯通道的資料可 被要求在該Β節點的清除。 、 服fS DSCH胞元變化的情況下’在該飼服 不足^胞元變化後，在該來源B節點緩衝的所有該UE資料 ㈣。該RNC清除該來源B節點以釋出在伴隨該证 、斤有緩衝器的資料使沒有任何無線電來源會在不必要的資料 1380635 傳輪上被浪費。 在RLC重新設定或RLC重新傳輸的情況下，該可藉 由傳輪優先順序行或是交替地由伴隨該RLC實例的邏輯通道而 對特定UE選擇性地清除在該B節點緩衝的資料。在j^c重新 傳輪的情況下，該清除功能會減少RLC重新傳輸的延遲且在 ic重新設定的情況下，該清除功能會避免無線電來源的浪費。 再一次參考第3A圖’該RNC決定觸發事件是否已接收（步
驟14)，若未接收，則該RNC回到步驟12並持續等待觸發事 件的發生。細發事件已被_，_職傳送—個清除訊息 至該B節點，此訊息顯示該B節點應清除伴隨該ug的所欲資 料（步驟16)，此可為在一或更多缓衝器的資料，其伴隨著一 或更多資·。在該B節點接收該訊息後（步驟18)其清除所 欲緩衝器（步驟20)。 根據本發明的方法10 ’應認知在該B節_資料的清除删 除了不再為刻的資料及釋出在該B _的㈣緩衝來源及不 必要地被分配以傳輸此資料的無線電來源。
亦應由胁本技藝者了解由轉16所騎騎除訊息可€ 括任何-或更多下㈣代方式。在該清_息的第—替代方i 中’在現有UTRAN步驟内的清除訊息在該職及該b節辦 發出訊息’鼠該B節職構形為由該B節點賊紐收起女 -清除。在f代方式中，在現有步驟中的該資料清除為絕射 且僅僅是訊息接收，沒有任何額外發出訊號，造成一種即使是自 ，息是關於完全㈣的功_紐清除。此_結合可以訊框长 可在咖臟攜帶、或是可以総技細 的U件或B㈣應用部份⑽則或 用部份（NASAP)的步驟被攜帶而發生。 硌于乎制 1380635 ..在該清除訊息的第二替代方式中，該清除訊息可包括在該 RNC及該B節點間發出訊息的完全新的或唯—的步 驟，其明確地指示該B節點開始所欲緩衝器的清除。此包括一 個完全屬於該清除功能的個別訊息。在此替代方式中，例如，在 訊框協定的一個新的控制訊框係專屬於該清除功能或是新的 NBAP步驟或是新的rnsap步驟係專屬於該清除功能。 該清除訊息的第三替代方式中，該清除訊息可包括一部份 現有UTRAN步驟。在此具體實施例中，於在該及該b節 點間發出訊息的現有UTRAN步驟的一部份訊息之位元或作自 屬於該清除功能。該B節點經由現有步驟接收此“ 及項取該位7G或信息元件以決定清除是否應發生。 料除Γ息的第四替代方式中，該B節點被預先構 訊息(其可為先前技藝訊息或新的訊息)時 了/月除貝枓。在此替代方式中，例如，哕 亦應由熟知本技藝者了解，佑赭 統操作的制，其他魏可能鱗在該…因適當系 能。對不同案例，本發明不防止由 除功能之性 清除功能與其他功能之統合。錢B即點的經狀C控制的 如第3B圖所示，与Γ R γ田L__ *⑽與參考第l圖l ::可:外確認清除功能。步辣 同。因此，這些步驟不He述的步驟⑽相 1380635 其送出一資料已被清除之確認至該RNC(步驟122)，該rnc接 著接收及處理此確認(步驟124)。 確認的形式及該RNC回應此確保所採取的動作基於合適不 同案例的不同系統結構而不同。做為實例，在HSDPA當清除功 能被設計用於RLC PDU重新傳輸時，在完成清除功能後由該b • 節點至該RNC的確認可被進行以使該rnc重新開始pDU傳 輸。在此情況下，該確認可以如先前所提及的類似方法進行。 在該確認訊息的第一替代方式中，該確認訊息在由該B節 Φ 點至該的現有訊息内如訊框協定資料框架的標頭、或 NBAP或RASAP的先前技藝訊息的一或許多位元或信息元件。 在該確認訊息的第二替代方式中，該確認訊息可包括完全 新的或唯-的訊息。此包括-個完全屬於該清除魏的碟認之個 :別訊息，例如’在專屬於該清除破認功能的該訊框協定的一鑛 的控制訊框或是專屬於該清除確認功能的或是顧从 新訊息。. 心目ί後i該確認訊息的第三替代方式中，由該B節點至該 訊先構形躺示該清除魏的顧，岐在訊息中 場熟知本技藝者了解，依據 其他可達到適當系統操作的方法可被使用以域認 式為何’應注意該確認可包括許多功能，首先， ，、匕括元成該清除功能之該B節 該B筋It沾即點的確涊。或者，其可提供在 不矣、#輸之狀_以輔助該綱：操作。因該B節點 不知道該PDU的SN，故該B節f㈣即 的汹回到該rnc，該B節勢^法直接傳达經傳輸的PDUs 占θ Μ如辨識在該Β節點的PDUs [S1 9 【來通知該關於該PDU的傳輸狀態，該狀態可 顯7^已被清除及正等待傳輪的PDUs或PDUs之數目。 兮TTT^f 4〇^，本發明方法5G的—個實例被示出，在此案例， ^ 態PDU’其顯示一或更多PDUs為失聯的。在步 L % ί輸一耻狀態報告至該職，其顯示該咖s 舰3% #此貝例中’饭設該狀態報告顯示一或更多PDUs為失 狀態報告後，該腿:送出—訊息至⑽節點以 該===_PDUS，咖細峨重新傳輸的 =除訊息可經由訊框協定以具已重新傳輸的PDU的資料 =或::在較已重新傳輸的PDU為高的優先順序傳送的控制 ^匡。或者，在該ΝΒΛΡ或該抓⑽_息亦可被用來通知該 B主=’該B節點自所欲緩衝器清除該pDUs(步驟寧確認該 二矛…該PDU狀態至該rnc(步驟58)，接著該重新傳 j聯的及後續的PDUs(步驟6G)。該B節點.將這些pDUs向 ί (步驟62)。或者，該清除訊息可隨在訊框協定的失 ^=DUs而被包括或是可在譲处或該職从被傳輸，或 做為其上的個別訊息。 為傳傳t的情況下進行該料點的清除功能的益處 ί== 明於下列實例。參考第5圖，使用根據 本發月的 >月除功能，該Β節點清除緩衝器，故具SNs=6 9的ρ 被刪除’凊除功能完狀後，該β _確認清除魏至該細^ 且之後該RNC自SN=3(亦即在該证失聯的該pD戰新開始 RLC傳輸二之後該B節點接收具SN=3的該pDu，因沒有其^ PDUs在其前面，具SN=3的該經重新傳輸蘭較第2圖所示 例更為快速地被傳輸。在此實财，_ B節點已被清除後具 SNs=6-9的該PDUs由傳輪側的該虹再次被重新傳輸。 重新酬後’該腹：立即以其最佳能力開始 ^開始正W PDU順序’或者其可料直_咖清除狀離 自該B節點送出，確認清除及給予信息於該已清除的職，、 第—#代方射，該清除魏之確認未行，或是即 二：=:r d傳自該~指; 在第二替代方式中，該耽等待直到清除確認自該B節點 ^田右财認亦含在該B節點資料區塊傳輸的狀態，_ RNC w吏用該k息以決定於何處重新開始該pDU傳輸。 亂f第6圖’根據本發明替代方法70被示出。此方法70 、似於第4 ®所不的方法5G，除了無清除 點送至該RNC的PDU狀態。 m β即 r圍ίΓ本發明已以較佳具體實施例敘述，在於下文申請專利 =列出的在本發明範圍内的其他變化為熟知本技藝者明顯易 【圖式簡單說明】 第1圖為該RNC的先前技藝重新傳輸。 '第2圖為無清除的先前技藝RLC重新傳輸。 第3Α圖為根據本發明產生清除訊息的方法。 ^犯圖為根據本發明包括確認應答的產生清除訊息的替代方 1380635 第4圖為根據本發明方法的該B節點的清除 等待直到該PDU清除狀態已接收才重新傳輪。只·
，且該RNC 第5圖為根據本發明方法具清除的RLC重新傳輪。 第^圖為根據本發明方法的該B節點的清除之實例’且該RNC 不等待直到該PDU清除狀態已接收即重新傳輸。 【主要元件符號說明】 10、50、、100 方法 12-20、52-62、112-120、122、124 步驟
12

Claims (1)

1380635* 101年8月10日修正替換頁 七、申請專利範圍： -—— 1. 一種用於有效管理封包資料單元(PDU)傳輸的無線通訊系 統’該糸統包括： 热線電網路控制器(RNC)，被配置用於偵測關於與一使 用者設備(UE)關聯的複數個pdu的一清除觸發事件，以及用於 傳送一清除訊息到一節點B以請求從該節點B的缓衝器清除與 該UE關聯的該複數個pDU的至少一部分；以及 一節點B，包括用於儲存等待傳送到一使用者設備(UE)的 一緩衝器，該節點B被配置用於在接收到該清除訊息時從該緩 衝器刪除該請求的複數個PDU。 2. 如申請專利範圍第丨項所述的無線通訊系統，其中該清除觸發 事件為該UE的一高速下行分享頻道(HS_DSCH)胞元變化。 3. 士申β專利範圍弟1項所述的热線通訊系統，其中該清除觸發 事件為一無線電連結控制重置。 4. 如申請專利範圍第1項所述的無線通訊系統，其中該及該 筇點B以一確認應答模式(AM)進行通訊，且該清除觸發事件為 從該UE傳送至該節點B的一無線電連結控制狀態報告訊息。 5·如申請專利範圍第1項所述的無線通訊系統，其中該節點^被 配置用於從該節點B的該緩衝器刪除所有與該证關聯的該複 數個PDU。 ~ 6·如申請專利範圍第1項所述的無線通訊系統，其中該清除訊息 被包括在從該RNC傳送到該節點B的一資料框架中。 ^ 7‘如申請專利範圍第6項所述的無線通訊系統，其中該清除訊息 13 為從該RNC傳送到該節點B的該資料框架中所包括的一信息 元件。 8. 如申請專利朗第6項所述的無線通訊系統，其中該清除訊息 為從該RNC傳送到該節點B的該資料框架中所包括的一位元。 9. 如申請專利麵第7撕述的無線通訊系統，其中該清除訊息 指出一 liS-DSCH持訊者的釋出。 10. 如申請專利範圍第9項所述的無線通訊系統，其中該節點B更 被配置用於在從該節點B的緩衝器刪除該請求的複數個脚 時傳送一緩衝清除確認至該RNC。 11. 如申4專利範圍第9項所述的無線通訊系統，其中該緩衝清除 確認包括該節點B處的PDU傳輸狀態。 12. 如申响專利範圍第9項所述的無線通訊系統，其中該幻更被 配置用於在接收到該緩衝清除確認時繼續傳送pDU到該節點 B。 13. 如申請專利範圍第9項所述的無線通訊系統，其中該缓衝清除 確認被包括在一資料框架標頭中。 14. 如申請專利範圍第Π項所述的無線通訊系統，其中該緩衝清除 確認被包括在該資料框架標頭的一信息元件中。 15. 如申請專利第13項所述的無線通訊系統，其中該緩衝清除 確認為該資料框架標頭的至少一位元。
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