TW200405691A - System for efficient recovery of node-b buffered data following MAC layer reset - Google Patents
System for efficient recovery of node-b buffered data following MAC layer reset Download PDFInfo
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- TW200405691A TW200405691A TW092125124A TW92125124A TW200405691A TW 200405691 A TW200405691 A TW 200405691A TW 092125124 A TW092125124 A TW 092125124A TW 92125124 A TW92125124 A TW 92125124A TW 200405691 A TW200405691 A TW 200405691A
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Description
200405691 五、發明說明(l) " 〔發明領域〕 本發明係有關於無線通信領域。特別是,本發明係有 關於,在一個中間節點的媒體存取控制器(MAC )層重設 後,一對第二層(Layer 2 )自動重覆要求(ARQ )對等實 =二資料傳輸的有效回復,其中,資料傳輸係經由這個 !::點進行散佈。這種轉移情節的-個例子係一種利用 7 5二自動重覆要求(H 一刷)及適應性調變及編 (AM&C )技術的系統。 〔發明背景〕 係且有通用地表無線存取網路(UTRAN) '、,、有數们…線、,,罔路控制器(RNC ) f ^f,Jil (RNC^ -Λ Λ Β節點係關連於一個或多個胞元。 “ i且’各個 工(τ通二 將資料傳輸散佈(亦即^線網路控制器⑽…藉以 備(UE )。然而,對於二緩衝及排程)至對應的使用者設 頻道而言,資料係利田第二代(3G )行動電話系統的高速 高速頻道的一個例子:,個B節點散佈。舉例來說,這些 DSCH)。由於資料係=高^下行連結共享頻道(HS — 須要加以緩衝,藉以 '用這個B節點散佈,因此,資料必 者設備(UE )的散佈^仃B節點的傳輸。當連結這個使用 佈實體的緩衝資料可二體(B節點)發生改變時,這個散 如會出現資料遺失。由於資料係利用
五 、發明說明(2) 這個中間節點(B節點)散 器(RNC )並無法得知封包資时_ ’這個無線網路控制 態。有鑑於此,這個使用者設早70 ( PDU )的最新傳輪狀 失、並經由這個無線網路控 此)必須要偵測資料遺 料單元(PDU)的重新傳輪I諸° (RNC)要求遺失封包資 料單元(PDU ))。若這個狀能=二利用一個狀態封包資 生發生延遲’則資料重新傳輸ν:Λ料單元(剛)的產 服務品質(QoS )要求亦 7延遲便可能變大,並且, 在這種高速下行連纟士」、、、会達到。 中’由於各個無線網;;制以(^^ 點,並且,由於使用者設備^RNC)係關連於數個6節 行動使用者設備(UE)改 )胞兀轉移的關係,一個 改變無線網路控制哭即4的機會係更大(相較於 亦可能會更形惡化y 的機會),因此,這個問題 這種高速下行連結乒 性調變及編碼(應)技進\(hs-dsCh)得、利用適應 利用混合式自•重覆要=進:南速的貲料傳輸’並且’ 可能性。告Μ 4田j (H〜ARQ )增加成功傳遞資料的 無線存取=(UE)必須改變這個通用地表 :速丁連結共享頻道(HS,)胞元係發生改變,^ 這個用地表無線存取網路(UTRAN)存取點係執行 傳輸及I向速下行連結共享頰道(HS —DSCH)無線連結的 及/式收。另外,當另一個胞元實現改良實體頻道條件 3 e良實體容5時’這個服務高速下行連結共享頻道 200405691 五、發明說明(3) ----- (HS — DSCH )胞元亦會發生改變。 服務南速下行連結共享頻道(HS — DSCH )胞元改變係 ^有兩種類型。當這個使用者設備(UE )在關連於相同B =點的兩個胞元間發生改變日夺,這種改變係稱為一種内β 二=(Intra_—Node B)服務高速下行連結共享頻道(HS SCH )胞改變。另外,當這個使用者設備(UE )在關 不同點的兩個胞元間發生改變時,這種改變係稱 即點(Inter〜N〇de B)服務高速下行連結共享 ^ ^ DSCH ^胞兀改變。當發生一個外B節點(Inter 改=ΓB) T務南速下行連結共享頻道(hs — dsch )胞元 的,日^" 1.在^個服務高逮下行連結共享頻道(Hs — dsch ) i =改又以4的B節點係稱為來源B節點,並且,在這個服 二W速下行連結共享頻道(HS — DSCH )胞元改變以後的B 即點係稱為目標B節點。 ^個無線網路控制器(RNC )及這個使用者設備 個;^…均會具有對等的無線連結控制器(RLC )實體。這 、兔运無線連結控制器(RLC )實體會在這個封包資料單 $ PDU )標頭内發送一個序列數目(SN ),其係提供這 偯2彳欠無線連、结控制器(RLC )實體使用’藉以確認這個 =的所有封包資料單元(PDU )均沒有遺失。若這個傳 ^ ^,發生封包資料單元(PDU )的遺失(可以經由封包 =料單凡(PDU )的失序傳遞得知),這個接收無線連結 ^ ^為(1(:)實體便會傳送一個狀態報告封包資料單元 DU ) ’藉以將遺失封包資料單元(PDU )的情況告知這
200405691 五、發明說明(4) 個傳送無線連社批也丨 資料單元實體κ固狀態報告封包 態。另外,這個⑧/成功及/或失敗f料傳輪的狀 遺失或接收,告封包資料單元(PDU)亦會指出 個封包次料J匕貝枓早兀(叩ϋ)的序列數目。若遺 me ^V.(PDU) 重新傳輸至這個3接將收 遺表失封包資料單元(PDU)的複本 _ ^似接收無線連結控制器(RLC )。 這個傳送無線連結控制 ( 個接收無線連結㈣哭上八? 可以經由這 包資料單元(PD^ )貫體輪詢一個狀態報告封 、 (DU )。這個輪詢功能传接征 ^ . 以讓這個傳送無線連結控制器心巧::種機:’藉 資料單元(PDU)傳輸的狀能μ體得以要求封包 求u-ARQ)操作可以排除;分失、敗Τ广合自動重覆要 協定層最終才是耗成功傳遞資料的1 =控制器、me) 由於傳遞條件的動態改變,、 要關鍵。 道(HS — DSCH )胞元改變必須快速^逮下行連結共享頻 務品質(QoS )。當這個服務古、、广這成,藉以維持相當服 一 DSCH)胞元改變時,在這個^下^連結共享頻道(HS 資料單元( PDU )成功傳輸以前,、言:點的所有現存封包 可以停止這個來源B節點的傳輪及=固使用者設備(UE ) 點係執行資料的排程及緩衝,並且收。由於這個來源B節 極高(舉例來說,l〇Mb/sec或更言’由於這些資料速率係 備(U E )執行某個服務高速下行向’當這個使用者設 硬結共享頻道(HS — 200405691 五、發明說明(5) ' —- DSCH )胞元改變時(特別是,當執行相互B節點轉 時),這個來源B節點的相當緩衝資料將可能會遺 種資料遺失的理由係:在這種通用行動電信系統、(umts°) 地,無線存取網路(UTRAN)架構内,這個來源β節點 衝貪料亚,有任何機制,藉以轉移至這個目標^節點。、者 $個服務高速下行連結共享頻道(HS_DSCH)月包元改變" 桫’這個無線網路控制器(RNC ),當發生 候,並無法瞭解總共遺失多少f ® ^/失的$ 制哭r /巧天夕乂貝抖,因為這個無線網路控 μ ; 亚…從得知這個來源β節點的緩衝資料。 ^刖,、白知技術系統大致上可以應用兩種方式,藉以 處理這個來源β節點的绣输杳 9 rHQ nc衝貝枓回復。在某個高速下行連 =子頻迢(HS-DSCH)胞元變化以後 網路控制器(RNC )經由、士·你^ ^ -個狀態封包資料單元;;:吏用者設備(UE)具體輪詢 ^ , 才早疋(PDU ),或者,(2 )這個益線網 = =NC丄可…個目標胞元中進行傳輸:並 &能=^ t #押,備(UE )理解的失序傳遞將會產生這個 狀恕封包貧料早几(pDu )。 (_在、第;^5況中,其中,這個無線網路控制器 Γ人Λ敗詢1狀態封包資料單元(PDU ),首 先,延個無線網路控制σσ 中建立這個實體頻道益(RNC)必須等待,直到新胞元 (PDU)要求會傳送出。/後,,這個狀態封包資料單元 (UE )接收及處理。,I且,經由這個使用者設備 態封包資料單元(PDU )個使用者設備/ UE )會產生f,個狀 、 ),並且,將這個狀態封包資料單
醒1_
五、發明說明(6) 2 ( PDUJ回傳至這個無線網路 這個狀態封包資料單元(pD 二制為(RNC ),藉以處理 元(PDU )需要重新傳輸。 、並決定那些封包資料單 在第二種情況中,盆中,、 (RNC)直接由這個來源胞元無線網路控制器 料單元(PDU ),這個使用Λ ^位I開始傳輸封包資 序傳遞,並產生—個狀態封包會識別資料的失 傳至這個無線網路控制器、"早广(PDU ),藉以回 (RNC )係處理這個狀°封 。這個無線網路控制器 些封包㈣單元⑽^;::^。(間、並學習那 回復在5: Ξ :;若這個來源β節點的緩衝資料需要 但是,這個::::r=i,(PDU)將會進行處理, 會產生相當程=傳輪資料的適當接收將 的延遲產决、丄加此&遲&疋由於這個使用者設備(ue ) 益魂㈣"悲'封包資料單& (pdu),以及,這個 ,,二 Λ器 / _ 4 右專輸疋在延個無線連結控制器(RLC )確認模 資料將不會傳送至較高層級(1尋),直到 合+ !: 1遞能夠達到。因此’這個使用者設備(uE)將 曰齡這個失序資料,直到那些遺失封包資料單元 、一 旎夠重新傳輸。這不僅會導致傳輸延遲,並且, =個使用者設備(UE)亦會額外需要一個資料緩衝記憶 :舌猎以連續性的資料接收,直到那些遺失資料可以成功 新傳輸。否則,有效的資料傳輸迷率將會降低,進而
第10頁 200405691 五、發明說明(7) 影響服務品質(Q〇S )。由於記憶體需要較高成本,這種 設計亦不符實際需要。
關於轉移的另一個問題乃是這個使用者設備(此)的 緩衝資料。在這個媒體存取控制器(MAC )層内部,通常 會具有數個混合式自動重覆要求(Η 一 ARq )處理器,藉以 執行混合式自動重覆要求(Η — ARQ )處理。如第}圖所 不’混合式自動重覆要求(H —ARQ )處理乃是一種方法, ,包括:傳輸端點(Ρ1Β至Ρ1Ε )的數個並聯混合式自動重 覆要求(H-ARQ )處理器,以及,接收端點(ρν至ρΐυΕ ) .的數個對應並聯混合式自動重覆要求(H—ARQ)處理器。 =對處理器(舉例來說,P1B及以旧)係重覆地及依序地堂 輸一個資料方塊,直到這個傳輸成功,藉以確保各^ 二;方塊能夠無誤地接收。對於各個資料方塊而言, f功混合式自動重覆要求(H—ARQ)傳輸的需要時間各 2,、。由於數個資料方塊係並聯處理,因此,傳輸川員二 月匕…、法維持。有鑑於此,當這個接收混合式自動重覆1 二:ARQ) 4理器成功收到某個資料方塊時,資料J 線】Κι至一個記錄緩衝器,藉以合序地傳遞至這個盔 結控制器(RLC)層。基於這些資料方塊在轉送至二 線連結控制器(RLC)層以前指定的傳輸序號,這: 。錄緩衝器將可以重新排列這些資料方塊。 一 ^外B節點(Inter—Node B)或内B節點(Intra〜 =)轉移時’這些無線資源控制器(RRC)訊息通 曰1栽—個媒體存取控制器(MAC)層重設指標至這個
第11頁 200405691 五、發明說明(8) 用者設備(UE )。在收到一個媒體存取控 重設置指標時,這個使用者設備(UE )會執;;_(MAC )層 能,其包括但不限於··清除所有架構混合:二系列功 U—ARQ)處理的緩衝器(亦即··將這些 2重覆要求 有高速媒體存取控制器(MAC —hs )層封包資斜、。衝器的所 (PM)分解成專用媒體存取控制器(Mac—^叶=兀 料單元(PM)、並將所有專用媒體存取控制以包資 (MAC -d ) I及其關連的無線連結控制 取控, 藉以清除這些記錄緩衝器)。 )只體, 層必須在這個使用者今借n ( MAC — hs ) 自動重覆要求:二備,)重設’藉以使所有混合式 設,進二處理及所有記錄緩衝器能夠重 達成這個目標B節點的竿個斩古、*碰辨六% ° 器㈤C-hs)層實體的資料接收,“速媒體存取控制 改變後?:行連結共享頻·(HS-DSCH)胞元 態將無法得^敗,收封包資料單元(PDU)的正確狀 的程序完成,二直到=個★某體存取控制器(MAC )層重設 控制器(亚且,4些貝料方塊己經利用這個無線連結 有二KLL〕進行處理。 法,其中,$ -本發明的主要目的便是提供-種系統及方 藉以適當維持,用者設備(UE )的緩衝資料可以補償, 、艮矛乃品質(Q 〇 S )的要求。 200405691 五、發明說明(9) 〔發明概述〕 MIF 1 I月係種方法及系統,其中,這個使用者設備 以降i =線,路控制器(RNC)會執行一系統動作,藉 (macmH延 並且,避免某個媒體存取控制器 去私J ^ 時的封包資料單元(PDu)遺失。這個使用 接至、▲彳π E )的產生廷個狀態封包資料單元(PDU )係耦 (MAC),重嗖要;’由於某個媒體存取控制器 存取控制器二使用者設備(UE)媒體 產生竿個控制器(RLC)實體,並且,在 結控制器(RLC)實體進行處^ ::報口刚,幻用無線連 狀恕報告係提供所有成功接收封包資料單元 )的狀態至這個無線網路# ^ ' 個封包資料單元(PDU)狀態、(RNC)。如此,- 個無線網路控制器(RNC )收到二個二快速f生。在這 狀態報告後,遺失的封包資料單元=資料:元(間 番雜彳自认 、7寸早凡(P D U )便可以理解並 重新傳輸至這個使用者設備(UE )。 解亚 〔較佳實施例的詳細說明〕 其中本:: 月的2實施例係配合所附圖式詳細說明如下, /、 類似圖式符號係表示類似元件。 請參考第2圖所示的流程圖,其係表示本發明的第一
第13頁 200405691 五、發明說明〇〇 〜 —-- ㈣)#輸的i!重設條件後’決定這些封包資料单70 並且,這種較社至這個使用者設備(UE)的方法10, 首先,這個無ί貫施例係具有最小延遲。在這個程序中, 去#備ίϋ/Γ、表網路控制器(RNC )係理解重設這個使用 驟^ )。 媒體存取控制器(MAC )層重設的需要(步 一個使用主# 設的可能原因^^^ (UE)媒體存取控制器(MAC)層重 (HS -DSCH ) 疋啦生一個服務高速下行連結共享頻道 結共享頻道變化。在某個外B節點服務高速下行連 個來源Β節點等/、^CH )胞元變化的情況下,以及,在這 來源胞元重新路;攻個^標B節點、但傳輸佇列無法由這個 速下行連結技古* 、,這個目標胞元的某個内B節點服務高 個無線網路控:哭、^ ( Μ〜D S C Η )胞元變化的情況下,這 享頻道(HS〜Dsi a RNC )會將這個服務高速丁行連結共 14 )。在任何一)主胞元變化通知這個B節點(步驟 重設係有所需:種’ 一媒體存取控制器(說)層 DSCH )胞元改變$,者廷個高速不行連結共享頻道(HS — 個無線網路控制固使用者設備(UE)會被告知這 設要求,諸如:::由二)的媒體存取控制器(MAC)層重 示(步驟U)。無線資料控制器(RRC)訊息指 啟動,並且,不^有f的是,步驟16亦可能在步驟14前 熟習此技“域負面影響。 、次者§瞭解,除了這個高速下行連結共
第14頁 200405691 五、發明說明(π) ' ------- 子頻運(HS DSCH )胞元變化以外,一個媒體存取控制器 (MAC)、層重设亦可能具有許多原因,並i,這種方法1〇 亦可^適應’ #以在媒體存取控制器(MAC )層重設後, 利用XI個無線網路控制器(霞)決定封包資料單元 (PDIO傳輸狀態。舉例來說’這種較佳實施例可以保證 存取控制器(MAC)層重設,每當這個B節點混合 式自動重覆要纟(H〜ARq )處理需要重新啟動。 在^個無線資源控制器(RRC )訊息内部存在一個識 別碼i藉此,這個媒體存取控制器(MAC)層係可以執 一個重設。這個識別碼可以是這個服務 頻道(HS-嶋)⑩元變化的部分程序,或者 碼,在T個外B節點胞元變化或某個_節點胞元變化中, 重/『節點及使用者設備(UE)的媒體存取控制 :上搵丄部分程序。熟習此技術領域者應該瞭解, 坆们媒體存取控制器(MAC )層係具有許多特徵,· (MAc^hs) 叩YMAC —d)層。為方便說明本發明,這種較佳實 統稱為媒體存取控制器(mac )層。 、 ’、 這個高速下行連結共享頻道(HS — DSCH)乃 一 ====頻道無線連結“ 貝1 J 〈instance ) 。34些無線連結控 (RLC)實例(instance)基本上為邏輯頻道, 射至相同的傳輸頻道;舉例來說,數個無線連結控制哭、 (RLC )實體可以映射至單個傳輸頻道的高速下行連姓1
第15頁 200405691 五、發明說明(12) 享頻道(HS -DSCH )。一個無線連結控制器(RLC )實例 (instance )係稱為確認模式(Am ),若對等無線連結控 制為(RLC )實例(i nstance )間的正確傳輸係利用自動 重,要求(ARQ)確認。一對確認模式(AM)無線連結控 制器(RLC )實體係利用狀態封包資料單元(pDu ) ,°藉工以 f j個接收者能夠將封包資料單元(PDU)的成功傳輸曰狀 給=個傳送者。在這個高速下行連結共享頻道(M 、/CH )胞兀變化及某個媒體存取控制器(mac ’關連於某個特定高速下行連結共享頻道(HS曰-°又 ==ί!確認模式(AM)無線連結控制器⑽)實 幻便可^產生一個狀態封包資料單元(pDu )。 、 隨著這個媒體存取控制器(ΜΑ(:) 無線資源控制器(RRC )訊自孫剎田、_^门“日不沒個 陶的無線資源控制使用者設備 18)。這個使用者:nC)進订接收及處理(步驟
公认士 又備(UE )的無線資源栌制哭rPPfM 會榀查某個媒體存取控 、拴制即(RRC ) 定,並且,在這個媒體::上:)層重設指示是否設 定後,這個無線資源控制器二層重設指示設 制器(MAC )層重設要1 i ^ έ將廷個媒體存取控 層(步驟20) 。在收到這°個°這雜個媒^存取控制器、(MAC) 設要求後,這個媒體存取=::存取控制器(MAC)層重 並且,清除記錄緩衝器的^ = (MAC )層會進行重設, 射至這個高速下行連結共古j =貧料單元(PDU )至映 控制器(RLC )實體(步驟^ 逼(HS〜DSCH )的無線連結 ^ "驟22)。隨後,所有清除封包資 五、發明說明(13) 料單元(PDU )合右吝斗 —~ ^ (#^26) (PD^ -DSCH)的無線連結控制哭下一仃連結共享頻道(HS 行處理。 口。 LC )貫例(instance )進 錄緩元:r)狀態報告以前,記 制器(RLC )處理^^提早供1(Γυ )係、需要無線連結控 個無線網路控制哭(R '、1確且完整的傳輸狀態至這 報告能夠提早產;::即V在口^ 錄件列的所有緩衝封包資肖^媒^存取控㈣器' (MAC)記 結控制器(RLC )實例進行處理疋DU )利用這些無線連 元(PDU)可能會被誤認 =),部分封包資料單 路控制哭(RNC ) # ; U U,因此,這個無線網 (咖)°重新傳輸/以產生不必要的封包資料單元 已知,數種方法可以確保所 均已經利用這個無線連結控制=貝科早凡(刪) 使這些確認模式(ΑΜ)無線連姓押)進仃處理,错以 得到所有成功收到封包資料單(RLC)實f能夠 :’這個媒體存取控制器(MAC) ::確狀態。首 依序轉送封包資料單元(PDU) f必須由各個記錄佇列 佇列的"封包資料單元(PDU)結束=,:再產生各個記錄 一 在第二種替代方法中,各個 心不。 資料單元(PDU )會具有一個特。、彔佇列的最後一個封包 是這個使用者設備(UE )的接收奋示。這些特別指示即 又無線連結控制器(RLC ) TAj $ 17頁 200405691 五、發明說明(14) ' - 封包資料單元(PDU )的狀態報告。 在第三種替代方法中,這個無線連結控制 rlc 雷向這個媒體存取控制器(ΜΑ(Μ 一 w、MAL )層確認處理封包資料單 ,(PDU)的時間’並且,在處理所有封包資料單元 (PDU)以後,這個媒體存取控制器(MAC)層亦合產生一 個=資料單S (PM)狀態要求至這個無線連^控制器 )。纏秉解的是,#多方法均可以協調這個媒體 子控制裔(MAC )層及這個無線連結控制器(RLC ),藉 =確保,在產生這個封包資料單元(ρΜ)狀態訊息以 丽,所有封包資料單元(PDU)均已經進行處理。 二^接收及處理這些封包資料單元(pDU)以後,這個 j認,式(AM )無線連結控制器(RLC )會產生一個封包 貧料單元(PDU )狀態報告(步驟26 ),藉以指示所有成 功或未成功收到的封包資料單元(PDU )。映射至這個高 速下行連結共享頻道(HS—DSCH)的各個確認模式(AM) 無線連結控制器(RLC)實例(instance)分別會產生一 個封包資料單元(p D U )狀態報告。另外,即使某個確認 換式(AM )無線連結控制器(RLC )實例並沒有自這個媒 體存取控制器(MAC)層轉送任何封包資料單元(PDlJ), 這個確認模式(AM )無線連結控制器(rlc )實例 (instance)亦會產生一個封包資料單元(pDu)狀態報 告。隨後,這個使用者設備(UE )便可以將關連於這個高 速下行連結共享頻道(HS—DSCH)的各個確認模式(AM) 無線連結控制器(RLC)實例(instance)的封包資料單
第18頁 200405691 五、發明說明(15) 元(P D U )狀態報告傳送至 在這個無線網路控制器(:路控制器(RNC )。 式(AM )無線連結控制器(Rl ’假設這些確認模 (MAC )實體並未被告知:因“及媒體存取控制器、 (MAC)層重設而必須停止傳^ 媒體存取控制器 這個無線網路控制器(RNC )將备益 十早70 ( PDU ),則 制器(M A C )層重設地持續傳二、視於這個媒體存取控 收到關連於這個高速下行連資料單元(PDU)。在 j文、、、0共旱頻道 個確認模式(AM )無線連結控制器('uc ~DsCH)的各 (instance)的封包資料單元(pD L^)〜f例 無線網路控制器(RNC )的無線,報告後,這個 (instance)將會處理這此狀能運控制$ (RL〇實例 失的封包資料單元(PDU)並\報告丄步驟2”以決定遺 單元(PDU )的重新傳輪,藉以破彳/ =要產生封包資料 了達到服務品質⑶。”要;料傳遞:為 現有的傳輸處理。 、二重新傳輸必須優先於 〃應該注意的& ’媒體存取控制器(mac) I重設的需 要係常見於產生封包資料單元(PDU)狀: 要求指示(或部分常見指示)係可以鉻、、/ 口的而妥> 備(UE),藉以同時啟動這個焊體存取這個使用者设 郑體存取控制哭f Μ Α Γ )層 重設及產生這個封包資料單元(PDU)狀態報° ,吏用者設備⑽)將可以根據下列順序,執行各個功 月& 〇 根據本發明的第-較佳實施例,如第2圖所示,這個
200405691 五、發明說明(16) 無線網路控制器(RNC )係能夠在資料路徑由某個無線連 結切換至另一個無線連結時,持續傳輸封包資料單元 (PDU)至這個使用者設備(UE)。然.而,根據本發明的 兩個替代較佳實施例,如第3圖及第4圖所示,當某個高速 下行連結共享頻道(HS — DSCH )胞元變化或其二需要^體 存取控制器(MAC )層重設的事件時,資料傳輪貝彳而會中” $由直到下一個事件發生。應該注意的是,在第'3 ^及第4 團中’與第2圖具有相同圖式符號的步驟係完全相同。因 此’這些步驟的詳細說明將不再重覆於第3圖及圖的 細說明。 ϋ 本發明的第二較佳實施例,如第3圖所 ^ y. … ^ ^.....,… |係具有一 2在一個媒體存取控制器(MAC )層重設條件後,決定這 些封包資料單元(PDU )傳輸的狀態至這個 ^ 的方法1〇,並且,這種較佳實施例係具有者最又小備延 生。。、在這個無線網路控制器(RNC )理解某個媒體存取控 及:(MAC )層重設的需要(步驟12 ) '並告知這個B節點 制Ϊ用者設備(UEV步驟14及16 ”4 ’這個無線網路控 (RNC )會中止高速下行連結共享頻道(HS _dsc K有下行連結料(步驟17)。需要注意的是, 亦可以發生在步驟1 4或]R a 、,Q ^ ^ 爭迹 王/哪4 ^lb U刖,亚且,不會造成任何負面 :二。接著κ固無線網路控制器(RNC) 。料單元⑽)狀態報告(步驟32)。這個 : 議告係指示,在某個高速 結共; 頻逼US-DSCH)胞元變化的情況下,媒體存取控予
第20頁 200405691 五、發明說明(17) (MAC )層重設所致的封包資料單元(PDU )遺失及來源B 節點的其他封包資料單元(p D U )遺失。隨後,這個封包 資料單元(PDU )狀態報告會進行處理(步驟34 ),並 且,這些遺失封包資料單元(PDU )亦會重新傳輸至這個 使用者設備(U E )(步驟3 6 )。藉著安排需要首先重新傳 輸的遺失封包資料單元(PDU )的重輸時程,這個無線網 路控制器(RNC )將會啟動新胞元的重輸。隨後,^個無 線網路控制器(RNC)會由步驟17停止的先前傳輪=置^ 始,繼續封包資料單元(PDU )傳輸(步驟38 )。需要^ 意的是,步驟36及38亦可以同時執行。 / 請參考第4圖,其係表示根據本發明第三較佳實施例 的一種方法50。這種方法50係類似於第3圖所示的二法 4 0。然而,這種方法5 〇並不會因應於某個封包資料單元 (P D U )狀悲報告的接收(如弟3圖之步驟3 2所干、 重新開始這個高速下行連結共享頻道二: 連結傳輸至這個使用者設備(UE)。相對於此,本 =方法5°會在接收某個”觸發信號"(i某個 ,疋事件)* (步驟19 ),重新開始這個高 旱頻道(HS-Dsch)的下行連結傳輸 一共 這個觸發信號可以包括:在通用行動電信^種例子中, 表無線存取網路(UTRAN )的傳輪頻道建°立、、、’ (UMTS )地 一個無線網路控制器(RNC)的新,,目 ’其可以利用 以達成,如熟習此技術領域者所知。這:點發送程序加 (道)接收的一個確認信號(由這個ς =路控制器 ^屋生)即可以
第21頁 200405691 五、發明說明(18) 做為這個觸發信號。 在第二種例子中,這個觸發信號可以 再有這個,’ Π
步π指示的接收及偵測。在這個目標B節點中建立 J 時,這個B節點可以,在指派實體頻道決定 立專用貪源 輸時,決定一個”同步"。這個事件的指示會”、、可供^ =點傳 線網路控制器(RNC ),以及,可以用來做A 、/給足個無 號。 文為一個觸發信 在第三種例子中,這個觸發信號可以 、rr , 於百這個益綠杳
控制器(RRC )矛呈序的完成(亦即:這個無線網路;、 為(RNC )接收及這個使用者設備(UE )無線資源控^哭 (RRC)訊息的確認信號)。在步驟16中,這個無&次= 控制為(RRC )訊息會產生一個無線資源控制器(/確 認訊息,其乃是利用這個使用者設備(UE )產生,並且, 可以傳送至這個無線網路控制器(RNC )。當這個無線網 路控制器(RNC )收到這個訊息時,這個訊息亦可以 一個觸發信號。 馬
應該注意的是,這個使用者設備(UE )及這個無線 路控制為(RNC )間亦存在許多不同的發送信號,並且, j吏用者亦可能選定任何信號,藉以做為本發明的觸發信 號 因此’先如所述的三種例子僅是用來介紹、而非限定 f發明。無論這個觸發信號的形成為何,在這個無線網路 控,器(RNC )收到這個觸發信號後,這個高速下行連結 共享頻道(HS—DSCH.)的下行連結傳輸便可以重新開始 (步驟21 )。 "
第22頁 200405691 圖式簡單說明 第1圖係表示習知技術的混合式自動重覆要求(Η — ARQ ) 處理的方塊圖。 第2圖係表示,在某個高速下行連結共享頻道(HS — DSCH )胞元變化後,根據本發明較佳實施例,快速回復使 用者設備(UE )緩衝資料的流程圖。 第3圖係表示本發明第一種替代方法的流程圖,其中,在 開始傳輸這個目標胞元的某個新傳輸以前,這個無線網路 控制器(RNC )係等待一個狀態封包資料單元(PDU )。 第4圖係表示本發明第二種替代方法的流程圖,其中,在 開始傳輸這個目標胞元的某個新傳輸以前,這個無線網路 控制器(RNC )係等待一個觸發信號。 元件符號說明: 22 媒體存取控制器層重設及清除記錄缓衝器 RNC 無線網路控制器 UE 使用者設備
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Claims (1)
- 20040^691 六 1· 申請專利範圍 一種快、步 — 線網路抻告丨回復Β節點緩衝資料之系統,該系統具有一無 節點更器(RNC),關連於至少—B節點,該至少—、β 設備(UE ) 2至少—使用者設備(UE ),該至少—使用者 網路控制哭// D有至少一記錄缓衝一态,藉以緩衝經由該無線 包括:( R N C )傳送之封包資料單元(P D u ),該系统 哭tC罔路控制胃(rnc ),藉以產生-媒體存取控制 一 L)層重設通知; 1二ΐ制翠元’位於該使用者設備(ue )内部,藉以接收 肢存取控制器(MAC)層重設通知,並且,清除該至 少一記錄緩衝器; Λ至 上狀態裝置,位於該使用者設備(UE )内部,藉以在清除 該f錄緩衝器以後,決定該使用者設備(UE )接收封包資 料單元(PDU )的狀態,以及,基於該決定狀態以產生— 狀悲報告;以及 傳輸裝置,藉以將該狀態報告傳輸至該無線網路控制哭 (RNC) 。 °° 2 ·如申請專利範圍第1項所述之糸統,其中,該狀態裝置 係因應一控制信號,藉以執行該決定步驟,其中,該控制信號係表示該記錄緩衝器已經清除所有封包資料單元 (PDU )。 " 3·如申請專利範圍第2項所述之系統,其中,該控制信號 係一封包資料單元(PDU )結束指示,該封包資料單元 (P D U )結束指示係在清除該記錄緩衝裔之所有封包資料200405691申請專利範圍 單元(PDU )後產生。 ^如申t專利範圍第2項所述之系統,其中,該記錄緩衝 為之:最後封包資料單元(PDU )係獨一無二,並且,該 控制信號係具有該最後封包資料單元(PDU )。 t如申睛專利範圍第2項所述之系統,其中,該記錄緩衝 f之该最後封包資料單元(PDU )係一特別指示,並且, 5亥控制信號将呈女ϋ _ 具有該特別指π。 :^申請專利範圍第2項所述之系統,其中,該控制單元 係當該記錄緩衝器清除所有封包資料單元(PDU )時產生 该控制信號。 ^ 請專利範圍第1項所述之系統,其中,該無線網路 工J器(RNC )係,在產生該媒體存取控制器(MAc )芦 ,通,中斷資料傳輸。 ^ 批〇 =凊專利範圍第7項所述之系統,其中,該無線網路 】的(⑽◦)係,在收到該狀態報告後,重新啟動資料 傳輸。 、 9&如申請專利範圍第7項所述之系統,其中,該無線網路 控制器(RNC)係,在收 預定觸發信號後,重新啟動 貧料傳輸。 W如申請專利範圍第9項戶 之系統, ,jl I ’ 其中,該使用者 該預定觸發信號係 ? 虎係該狀態報告之接收。 •口申請專利範圍第g項所述 係產生-同步指系 同V拍不之接收。 200405691 六、申請專利範圍 1 2· —種在一系統中高速下行連結共享頻道(HS — DSCΗ ) 胞元變化之方法,該系統具有〆遠端無線網路控制器 (R N C ) ’纟亥無線網路控制哭(r ν C )耦接於至少一 Β郎 點,該至少一Β節點更耦接二至少一使用者設備(UE ), 該至少一使用者設備(UE )具有至少一記錄緩衝器,藉以 緩衝經由談無線網路控制器(rNC )傳送之封包資料單元 (P D U ) ’該方法係包括: 在該無線網路控制器(RNC )偵測一高速下行連結共享 頻道(HS — DSCH )胞元變化之需要; 通知該使用者設備(UE )以執行一重設; 在該使用者設備(UE )重設,包括清除違至少一記錄緩 衝器; 在該重設步驟後,在該使用者設備(UE )決定接收封包 資料單元(PDU )之狀態; 基於該決定步驟,藉以產生〆狀悲報告,以及 將該狀態報告由該使用者設備(UE )傳送至該無線網路 控制器(RNC )。 1 3 ·如申請專利範圍第1 2項所述之方法,其中,該決定步 驟係因應一控制信號而執行,其中,該控制信號係表示該 至少—記錄緩衝器已經清除所有封包炱料單70 ( PDU )。 U •如申請專利範圍第丨3頊所述之f法,其中,該控制信 號係一封包資料單元(pDlJ )結束指不’該封包資料單元 pmo、结束指示係在ΐ至少〆記錄緩衝器清除所有封包 貧料單元(PDU )時產生。200405691 六、申請專利範圍 1 5.如申請專利範圍第1 3項所述之方法,其中,該至少一 記錄緩衝器之一最後封包資料單元(P D U )係獨一無二, 並且,該控制信號係具有該最後封包資料單元(PDU )。 1 6.如申請專利範圍第1 3項所述之方法,其中,該至少一 記錄緩衝器之該最後封包資料單元(PDU )係一特別指 示,並且,該控制信號係具有該特別指示。 1 7.如申請專利範圍第1 3項所述之方法,更包括:在該記 錄緩衝器已經清除所有封包資料單元(PDU )時,產生該 控制信號。 1 8.如申請專利範圍第1 2項所述之方法,更包括:在該偵 測步驟後,中斷資料傳輸。 1 9.如申請專利範圍第1 8項所述之方法,更包括:在收到 該狀態報告後,重新啟動資料傳輸。 2 0.如申請專利範圍第1 8項所述之方法,更包括:在收到 一預定觸發信號後,重新啟動資料傳輸。 2 1.如申請專利範圍第2 0項所述之方法,其中,該預定觸 發信號係該狀態報告之接收。 2 2.如申請專利範圍第20項所述之方法,更包括:在該使 用者設備(UE )產生一同步指示,並且,該預定觸發信號 係該同步指示之接收。 2 3 · —種使用者設備(UE ),用以加速由一來源胞元至一 目標胞元之高速下行連結共享頻道(HS —DSCH )胞元變 化,該使用者設備(UE )具有至少一記錄緩衝器,藉以緩 衝該使用者設備(UE )之接收封包資料單元(PDU ),該第27頁 200405691 六、申請專利範圍 使用者設備(UE )係包括: 裝置,藉以偵測一重設指示,以及,因應該重設指示, 清除該至少一記錄緩衝器; 狀態裝置,藉以在清除該至少一記錄緩衝器後,決定該 使用者設備(UE )之接收資料狀態; 裝置,基於該決定步驟,藉以產生一狀態報告;以及 裝置,藉以傳輸該資料狀態報告。 24. 如申請專利範圍第23項所述之使用者設備(UE ),其 中,該狀態裝置係因應一控制信號,藉以執行該決定步 驟,其中,該控制信號係表示該記錄緩衝器已經清除所有 封包資料單元(PDU )。 25. 如申請專利範圍第24項所述之使用者設備(UE ),其 中,該控制信號係一封包資料單元(PDU )結束指示,該 封包資料單元(PDU )結束指示係在清除該記錄緩衝器之 所有封包資料單元(PDU )時產生。 26. 如申請專利範圍第24項所述之使用者設備(UE ),其 中,該記錄緩衝器之一最後封包資料單元(PDU )係獨一 無二,並且,該控制信號係具有該最後封包資料單元 (PDU )。 27·如申請專利範圍第24項所述之使用者設備(UE ),其 中,該記錄緩衝器之該最後封包資料單元(PDU )係一特 別指示,並且,該控制信號係具有該特別指示。第28頁
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