TWI257779B - System and method for efficient recovery of node-B buffered data following MAC layer reset - Google Patents

System and method for efficient recovery of node-B buffered data following MAC layer reset Download PDF

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Publication number
TWI257779B
TWI257779B TW092125124A TW92125124A TWI257779B TW I257779 B TWI257779 B TW I257779B TW 092125124 A TW092125124 A TW 092125124A TW 92125124 A TW92125124 A TW 92125124A TW I257779 B TWI257779 B TW I257779B
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Taiwan
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packet data
pdu
user equipment
data unit
controller
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TW092125124A
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English (en)
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TW200405691A (en
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Stephen E Terry
Yi-Ju Chao
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Interdigital Tech Corp
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    • H04N9/80Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
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    • H04N9/8042Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
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Description

1257779 九、發明說明: 【發明領域】 本發明係有關於無線通#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層重設後, 一對第一層(Layer 2)自動重覆要求(ARq)對等實體間、 資料傳輸的有效回復,其中,資料傳輸係經由這個中間節 點進行散佈。這種轉移情節的-個例子係一種利用混合式 自動重覆要求ARQ)及__變及編碼(麗)技 術的系統。 【發明背景】 -個第三代(3G)通用地表無線存取網路(臟 具有數個無線網路控制器(RNC), ”
制器⑽〇係關連於一個或多個二各:無,路控 節點係關連於-個或多個胞元。並且’各個B 通笔’這些第三代(3g)分井 工(TDD)系統係利用〜— v、又工(FDD)及分時雙 資料傳輸散佈(亦即:緩衝及排程)=(叫猎以將 (UE)。然而’對於第三 士應的使用者設備 而言’資料係利用這㈣節點散:動=統 頻道的-個例子係高 牛例來說,這些高速 於資料係利用這個B節.點j 了;;旱頻道(HS-DSCH)。由 衝’藉以進行B節點的傳二心:’資料必須要加以緩 的散佈實體(Β節點)發=吉這,用者設備⑽ 思個散佈實體的緩衝 1257779 禮可能會出現資料遺失。由於資料_用這個中間節點 (B節點)散佈,因此,這個無線網路控制器()並益 法得知封包資料單元(_的最新傳輸狀態。有鑑於此,、 這個使用者設備(UE)必須㈣測#料遺失、舰由這個 無線網路控制器⑽)要求遺失封包資料單元(酬)的 重新傳輸(諸如:利用-個狀態封包資料單元(p_。若 适個狀態封包資料單元(刚)的產生發生延遲,則資料重 新傳輸的延遲便可能變大,並且,服務品質(⑽)要求亦 可能無法達到。 在這種高速下機結共享頻道(Hs —DSGH)的情況 中由於各個無線網路控制器⑽C)係關連於數個B節點, ^且’由於使用者設備⑽胞元轉移的_,-個^動 =者設備(UE)改變B_的機會係更大(相較於改變 制器(_的機會),因此,這個問題亦可能 廣性^種高速下行連料享縣(HS —DS⑻係利用適 二_线編碼(蓮)技術進行高速的㈣傳輸,並且, 合ί Ϊ動重覆要求(H —_)增加成功傳遞資料的 個使用者設備(UE)必須改變這個通用地表 網路(UTRAN)存取點的關連胞元時,—個服務高 這個2連結共享頻道(HS—DSCH)胞元係發生改變,其中, 用地表無線存取網路⑽AN)存取點係執行這個 二::連、I!共享頻道(HS—DSCH)無線連結的傳輸及 卜,當另一個胞元實現改良實體頻道條件及/或 1257779 改良實體容量時,這個服務高速下行連結共享頻道(Hs dsch )胞元亦會發生改變。 /服務高速下行連結共享頻道dDSCH)胞元改變 係具有兩種類型。當這個使用者設備(UE)在關連於相同
t節點的兩個就間發生改變時,這種改變係稱為一種内B 即點(Intra-Node B)服務高速下行連結共享頻道(Hs —DSCH)胞元改變。另外,當這個使用者設備(UE)在關 連於不同B節點的兩個胞元間發生改變時,這種改變係稱 為—種外B節‘點(Inter-NodeB)服務高速下行連社丑古 頻道(HS-_)胞元改變。當發生一個外B節點二二 —Node B)服務高速下行連結共享頻道(hs — ds㈤胞元 改變時’在這倾務高速下行連料享賴(Hs—劃) 胞元改變以前的B節點係稱為來源B節點,並且,在這個 服務高速下行連料享财⑽—赃⑺胞元改變以後的 B節點係稱為目標B節點。 這個無線網路控制器⑽)及這個使用者設備⑽ 均會具有解的無線連結控制器⑽)實體。這個發送無 線連結控㈣⑽)實體會在這個封包f料單元(_ =内錢-㈣列數目⑽,其係提供這個接收無線連 …工| & me)貫體使用’藉以確認這個 資料單元⑽)均沒有遺失。若這個傳n =Γ)的遺失(可以經由封包資料單么二 ::傳_,這個接收無線連結控制器⑽)實體便 曰傳达-個狀祕告封包資料單元(_,藉以將遺失封 1257779 包資料單元(PDU)的情況告知這個傳送無線連結控制器 (RLC)實體。這個狀態報告封包資料單元(pDU)係描述 成功及/或失敗資料傳輸的狀態。另外,這個狀態報告封 包貧料單兀(pDU)亦會指出遺失或接收封包資料單元(pDU) 的序列數目。若遺失某個封包資料單元(pDU),這個傳送 無線連結控制器(RLC)實體便會將這個遺失封包資料單元 (PDU )的複本重新傳輸至這個接收無線連結控制器 (RLC)〇 口口 這個傳送無線連結控制器(RLC)實體亦可以經由這 個接收無線連結控制器(RLC)實體輪詢一個狀態報告封包 貧料單元(PDU)。這個輪詢功能係提供一種機制,藉以讓 這個傳送無線連結控制器(RLC)實體得以要求封包資料單 元(PDU)傳輸的狀態。雖然這種混合自動重覆要求(η一 ARQ)操作可轉除部分纽傳輸、並且增加成功傳遞資料 的可能性,但是,這個無線連結控制器(RLC)協定層最終 才是確保成功傳遞資料的主要關鍵。 由於傳遞條件的動態改變,這個高速下行連纟士乓享 (HS-DSCH)胞元改變必須快速達成,藉以維持相當 服務品質(QoS)。當這個服務高速下行連結共享頻道 — DSCH)胞元改變時,在這個來源Β節點的所' 育料單元(酬)成功傳輸以前,這個使用者設備(^E)$ 以停止這個來源Β節關傳輸及接收。由於這 二 點係執行資料的排程及緩衝,並且’由於這 二即 極向(舉例來說,l〇Mb/sec或更高),當這個使二設: 1257779 (UE)執行某個服務高速下行連結共享頻道(Hs — j)sch) 胞元改變時(特別是,當執行相互B節點轉移時),這個來 源B郎點的相當緩衝資料將可能會遺失。這種資料遺失的 理由係:在這種通用行動電信系統(UMTS)地表無線存取 網路(UTRAN)架構内,這個來源B節點的緩衝資料並沒有 任何機制,藉以轉移至這個目標B節點。當某個服務高速 下行連結共享頻道(HS — DSCH)胞元改變時,這個無線網 路控制為(題C),當發生資料遺失的時候,並無法瞭解總 共遺失多少資料,因為這個無線網路控制器(RNC)並無從 得知這個來源B節點的緩衝資料。 目前,習知技術系統大致上可以應用兩種方式,藉 以處理這個來源B節點的緩衝資料回復。在某個高速下行 連結共享頻道(HS — DSCH)胞元變化以後,(1)這個無線 網路控制器(RNC)經由這個使用者設備(UE)具體輪詢一 個狀態封包資料單元(PDU),或者,(2)這個無線網路控 制器(RNC)可以在這個目標胞元中進行傳輸,並且,這個 使用者設備(UE)理解的失序傳遞將會產生這個狀態封包 資料單元(PDU)。 在第一種情況中,其中,這個無線網路控制器(RNC) 會具體輪詢-個狀態封包資料單元(pDU),首先,這個無 線網路控制$ (RNC)必須等待,直到新胞元中建立這個實 體頻道。隨後,這個狀態封包資料單元⑽U)要求會傳送 出去,並且,經由這個使用者設備(UE)接收及處理。這 個使用者設備(UE)會產生這個狀態封包資料單元(pDu), 10 1257779 並且,將這個狀態封包資料單元(PDU)回傳至這個無線網 路控制器(R N C),藉以處理這個狀態封包資料單元(PD u)、 並決定那些封包資料單元(PDU)需要重新傳輸。 在第二種情況中’其中,這個無線網路控制器(RNC) 直接由這個來源胞元的停止位置開始傳輸封包資料單元 (PDU),這個使用者設備(UE)會識別資料的失序傳遞, 並產生一個狀態封包資料單元(PDU),藉以回傳至這個無 線網路控制器(RNC)。這個無線網路控制器(RNC)係處理 這個狀態封包資料單元(PDU)、並學習那些封包資料單元 (PDU)需要重新傳輸。 、 ^在這兩種情況中,若這個來源B節點的緩衝資料需 tr復i則—個狀態封包資料單元(PDU)將會進行處理, ^疋’每個使用者設備(UE)重新傳輸資料的適當接收將 會產生相當程度的延遲。這是由於這個使用者設備㈣ ,延€產生這個狀態封包資料單元(_,以及,這個益 制器⑽)的接收這個狀態封包資料單元⑽)。 是在這個鱗連結控㈣⑽)確認模式中進行, :釣、衾:會傳运至較高層級(layer),直到合序資料傳遞 = 因此’這個使用者設備⑽將會需要緩衝這 傳輪。、言貝;斗’直到那些遺失封包資料單元()能夠重新 亦^’這個制者設備⑽ 收緩衝記憶體,藉以連續性的資料接 的資料^些遺失資料可以成功地重新傳輸。否則,有效 貝枓傳輪逮率將會降低,進而影響服務品質_。由 1257779 ;己匕體需要較尚成本,這種設計亦不符實際需要。
緩衝器將可以重新排列這些資料方塊。 在外B節點(lnter —N〇de B)或内”點 -_B)轉移時,這些無線資源控制器(RRc)訊息通常 會承載-個親存取控制n (MAG)層重設指標至這個使用 者没備(UE)。在收到一個媒體存取控制器(财c)層重設 關於轉㈣另—姻題乃是職㈣者設備(ue) 合、友衝貧料。在這個媒體存取控制器(MAC)層内部,通常 ^具有數個混合式自動重覆要求(H — ARQ)處理器,藉以 、曰二混合式自動重覆要求(H-_)處理。如第!圖所示, 厂式自動重覆要求(H-_處理乃是—種方法,並包 1 .傳輪端點(P1B至P1E)的數個並聯混合式自動重覆要 ,(H —ARQ)處理器,以及,接收端點(piUE至ρι皿)的 數個對應並聯混合式自動重覆要求(H-_處理器。各 對處理器(舉例來說,及P1UE)係重覆地及依序地嘗 f傳輸―個資料方塊,朗這個傳輪成功,藉以確保各; 貧料方塊能夠無誤地接收。對於各個資料方塊而言,達到 成功混合式自動重覆要求(H—_傳輸的f要時間各不 f同、。由於數個資料方塊係並聯處理,因此,傳輸順序可 能無法維持。有鑑於此,#這個魏混合式自動重覆要求 (H-ARQ)處理器成功㈣某個資料方塊時,這個資料方 塊將會轉达至-個記賴觸’細合序地傳遞至這個無 線連結控制H (紅)層。基於:轉方塊在轉送至這個 無線連結控制器⑽)層以前指定的傳輸序號,這些記錄 12 1257779 置指標時’這個使用者設備⑽會執行一系列立 包括但不限於:清除所有架構混合式自動重覆要求二二 ARQ)處理的緩衝n (亦即:將這些記錄輯器的所速 媒體存取控制器⑽— hs)層封包龍單元⑽^解 成專用媒體存取控制器(MAC〜d)層封包資料單元(p^)、 專用媒體存取控制器⑽—d)層封包資料單元 )傳处專用碰存取㈣器( 控制器⑽)實體,藉以清除這些記錄= °°) °在卜B節點轉移時(包括部分内B節點轉移),這個 =媒=轉㈣⑽―hs)層必财這個使用者設備 重叹,猎以使所有混合式自動重覆要求(H〜ARQ) 处里及所有z錄緩衝$能夠重設’進*達成這個目標B節 點的某個新高速媒體存取控制器( — hs)層實體的資料 接收。 ' 7 在某個服務高速下行連結共享頻道(HS-DSCH)胞 =改變後,成功或失敗接收封包㈣單元(酬)的正確狀 悲將無法制,朗這侧體存取控彻(MAG)層重設的 私序70成,並且,這些資料方塊己經利用這個無線連結控 制器(RLC)進行處理。 有鑑於此,本發明的主要目的便是提供一種系統及 方法,其中,這個使用者設備⑶E)的緩衝資料可以補償, 藉以適當維持服務品質(Qos)的要求。 【發明概述】 13 1257779 本I月係-種方法及糸統,其 及無線網路控制器⑽c)會執 =使用者5又備⑽ :並且,避免某個媒體存取控制器崎層重設時 :==單元_遺失。這個使用者設備⑽的產 t t㈣包㈣單係输至這個媒體存取控 二:)層重设。在這個媒體存取控制器(MAC)層重 汉後,由於某個媒體存取控制器⑽)層重設要求的接收, =使用者設備⑽媒體存取控制器_層記錄緩衝 =所有封㈣料單元(觸)會清除至無線連結控制器 i t貫體,並且,在產生某個封包資料單元(™)狀 悲報告雨,利用無線連結控制器(RLC)實體進行處理。這 資料單元⑽)狀態報告係提供所有成功接收封包 貧广單元(PDU)的狀態至這個無線網路控制器(RN〇。如 此^個封包資料單元(PDU)狀態報告便可以快速產生。 在這個無線網路控制器(RNC)收到一個 狀態報告後,遺失的桃資鮮元⑽)便可1早理^重) 新傳輸至這個使用者設備(UE)。 【較佳實施例的詳細說明】 本發明的較佳實施例係配合所附圖式詳細說明如下, 其中’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 車父佳實施例。這種較佳實施例係包括··一種在一個媒體 存取控制為(MAC)層重設條件後,決定這些封包資料單元 14 1257779 (PDU)傳輸的狀態至這個使用者設備(UE)的方法1〇, 並且,這種較佳實施例係具有最小延遲。在這個程序中,
首先,這個無線網路控制器(RNC)係理解重設這個使用I 設備(UE)媒體存取控制器(MC)層重設的需要(步驟 12)。 一個使用者設備(UE)媒體存取控制器(MAC)層重 設的可能原因乃是發生一個服務高速下行連結共享頻道 (HS — DSCH)胞元變化。在某個外B節點服務高速下行速 結共子頻道(HS-DSOI)胞元變化的情況下,以及,在這 個來源B節點等於這個目標B節點、但傳輸㈣I法由這 個來源胞元重新路由至這個目標胞元的某個内”點服務 高速下行連結共享頻道(HS — DS⑻胞元變化的情況下, 這個無線網路控、⑽)會將賴服務高速下行連結共 享頻道(HS-DSCH)胞元變化通知這個β節點(步驟14)。 在任何一種情況下,—舰存取控制II (MAC)層重設係有 所需要。隨著這個高速下行連結共享頻道(Hs—議)胞 元改變指示’這個使用者設備⑽會被告 路控制器⑽)的媒體存取控制器⑽)層重設要t 壯.經由某個無線資料控制器⑽)訊息指示(步驟 Γ不應步驟16亦可能在步驟14前啟動,並 且,不會具有任何負面影響。 熟習此技術領域者#瞭解,除了這 共享頻道(HS — DSCH)腧分作儿t 门I卜盯連、、、口 哭mn⑯會1 以外,一個媒體存取控制 °。()層4可能具有許多,並且,這種方法 15 I257779 =亦可叫應,藉以麵财取㈣^ (mag)層重 f用這個無線網路控制器(W)決定封包資料單元⑽) =輪狀態。舉例來說’這種較佳實施例可以保證—個媒體 ^取控制WMAC)層重設,每當這個B節點混合式自動重 设要求(H —ARQ)處理需要重新啟動。 =個無線資源控制器⑽)訊息内部存在一個識 別碼’措此,這個媒體存取控制器()層係可以執行一 個重設。這個酬碼可叹服務高速下行連結丘享頻 道(HS-DSCH)胞元變化的部分程序,或者,這個識別碼, 在某個外B節點胞元變化或某_B節點航變化中,亦 可以是重設B節點及使用者設備(UE)的媒體存取控制器 (MAC)層的部分程序。熟習此技術領域者應該瞭解,這個 媒體存取控制器(MAC)層係具有許多特徵,包括:高速媒 體存取控制器(MAC-hs)層及專用媒體存取控制器(Mc -d)層。為方便說明本發明’這種較佳實施例係統稱為媒 體存取控制器(MAC)層。 這個高速下行連結共享頻道(HS—DSCH)乃是一個 資^專輸頻道。各师料傳輸頻道係具有數個無線連結控 制器(RLC)實例(i nstance)。這些無線連結控制器(RLC) 實例(instance)基本上為邏輯頻道,其可以映射至相同 的傳輸頻道;舉例來說,數個無線連結控制器(RLC)實體 可以映射至單個傳輸頻道的高速下行連結共享頻道(HS— DSCH)。一個無線連結控制器(RLC)實例(丨阳拉nce)係 稱為確§忍模式(AM),若對等無線連結控制器()實例 16 1257779 (instance)間的正確傳輸係利用自動重覆要求(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),藉以使這個接收者能夠將封 包資料單元(PDU)的成功傳輸狀態指示給這個傳送者。在 這個高速下行連結共享頻道(HS — DSCH)胞元變化及某個 媒體存取控制器(MAC)層重設以後,關連於某個特定高速 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)實例便可以產生一個狀態封包資料單 元(PDU)。 隨著這個媒體存取控制器(MAC)層重設指示,這個 無線資源控制器(RRC)訊息係利用這個使用者設備(UE) 的無線資源控制器(RRC)進行接收及處理(步驟18)。這 個使用者設備(UE)的無線資源控制器(RRC)會檢查某個 媒體存取控制器(MAC)層重設指示是否設定,並且,在這 個媒體存取控制器(MAC)層重設指示設定後,這個無線資 源控制器(RRC)會將這個媒體存取控制器(MAC)層重設 要f告知這個媒體存取控制器(MAC)層(步驟2〇)。在收 到<個媒體存取控制器(MAC)層重設要求後,這個媒體存 取控制H (MAC)層會進行重設,並且,清除記錄緩衝器的 ,斤有封包資料單元(PDU)至映射至這個高速下行連結共享 頻道(HS — DSCH)的無線連結控制器(RLC)實體(步驟 22)°隨後,所有清除封包資料單元(pDU)會在產生一個 封^貝料單兀(PDU)狀態報告(步驟26)前,利用映射 至鬲逮下行連結共享頻道(HS —DSCH)的無線連結控制器 17 1257779 (RLC)貝例(instance)進行處理。
在產生-個封包資料單元(_狀態報告以前,記 賴衝器的延遲封包資料單^(刚)係需要無線連結控制 益(RLC)處理,藉以提供射且完整的傳輸狀態至這個無 線網路控㈣(聰)。若封包單元⑽)狀態報告能 夠提早產生(亦即:在媒體存取控⑽)記錄符列的 所有緩衝封包資料單元⑽)利用這些無線連結控制器 jRLC)實例進行處理以前),部分封包資料單元可 能會被誤認為尚未收到’因此,這個無線網路控制器() 便可以產生不必要的封包資料單元(刚)重新傳輸。 已知,數種方法可以確保所有封包資料單元(PDU) 均已經利料個紐連結控㈣(RLG)進行處理,藉以使 這些確認模式⑽無線連結控制器(RLC)實體能^得到 所有成功_封包㈣單元⑽)的正確狀態。首先,這 俯某體存取控㈣⑽)層必須由各個糊宁列依序轉送
單元⑽)’然後,再產生各個記錄仔列的,,封 u貝枓早元(PDU)結束,,指示。 在第二種替代方法巾,各個記錄㈣的最後一個封 j料單元⑽)會具有-個特別指示。這些特別指示即 =使用者稍(UE)的接收無線連結控咖(⑽封 匕貝料單元(PDU)的狀態報告。 ^在第二㈣代方法中’這個無線連結控制器() 曰向讀媒體存取控制器(MA〇層確認處理封包資料單元 的日守間,並且,在處理所有封包資料單元(?而) 18 1257779 以後:這個媒體存取控制器(MAC)層亦會產生一個次 料單元(PDU)狀恶要求至這個無線連結控制器(rlc ^ 該暸解的是’許多方法均可以賴這侧體存取控制^ (MAC)層及這個無線連結控制器(RLC),藉以確保產° 生這個封包資料單元⑽)狀態訊息以前,所有封包資料 單元(PDU)均已經進行處理。 貝广 > #在接收及處理這些封包資料單元(PDU)以後,這個 確認模式(AM)無線連結控制器(RLC)會產生_個封包次 料單元(PDU)狀態報告(步,藉以指示所有成= 未成功收_封包資料單元(_。映射至這個高速下行 連結共享頻道(HS-DSCH)的各個確認模式⑽)無線連 結控制器(RLC)實例(instance)分別會產生—個封 料單疋(PDU)狀‘%報告。另外,即使某個確賴式() 無線連結控繼⑽)實倾沒有自這烟體存取控制器 (MAC)層轉送任何封包資料單元(刚),這個確認模式㈤ 無線連f控制器(RLC)實例(instance)亦會產生一個封 包貧料單it (PDU)狀態報告。隨後,這個使用者設備⑽) 便可以將關連於這個高速下行連結共享賴(hs—剛) 的各個確4¼式(AM)無線連結控難(㈣)實例 (instance)的封包資料單元⑽)狀態報告傳送至這個 無線網路控制器(RNC)。 在這個無線網路控制器⑽c)中,假設這些確認模 ^ (AM)無線連結控制器⑽)及媒體存取控㈣(MAC) 貫體亚未被告知:因為這個媒體存取控制器(MAC)層重設 19 1257779 祕須停止傳輸封㈣料單元(酬),騎個無線網路控 制器(RNC)將會無視於這個媒體存取控制器(MAC)層重 設地持續傳輸封包資料單元(酬)。在收到關連於這個高 速下行連結共享頻道(HS-DS⑻的各個確認模式⑽ 無線連結控制器(RLC)實例(instance)的封包㈣單元 (PDU)狀態報告後’這個無線網路控制器(騰)的無線 連結控制器(RLC)實例(instance)將會處理這些狀態報 告(步驟28)以決定遺失的封包資料單元(刚),並且, 視需要產生封包資料單元⑽)的重新傳輸,#以確保成 功的資料傳遞。為了達到服務品質⑽)要求,這些重新 傳輸必須優先於現有的傳輸處理。 應該注意的是,媒體存取控制器(MAC)層重設的需 ,係常見於產生封包資料單元⑽)狀態報告的需要。要 ^部分f見指示)係可以發送至這個使用者設備 ⑽,猎以同日樣動這個媒體存取控制器(崎層重設 及f生廷個封包資料單元⑽)狀態報告。隨後,這個使 用者设備(UE)將可以根據下列順序,執行各個功能。 轉本發明的第—較佳實施例,如 :無網路控制器⑽)係能约在資料路徑咖 …切換至另—憾線連結時,持續傳輸封包資料單元(酬) 者設備(UE)。然而,根據本發明的兩個替代較 -i ί ! 4 5 八子叔(HS-DSGH)胞元變倾其 器陶層重設的事件時,資料傳輪則會 20 1257779 娜件發生。應該㈣的是,在第3 W及第4财,與第 2圖具有相同圖式符號的步驟係完全相同。因此,這些牛 驟的詳細說明將不再重覆於第3圖及第4圖的詳細說= 一本發明的第二較佳實施例,如第3 _示,係具有 一種在=個髓存取控㈣(MO層重設條件後,決定這 -封包資料單元(PDU)傳輸的狀態至這個使用者設備⑽) 的方法10 ’並且,這種較佳實施例係具有最小延遲。在這 Γ無Ϊ網路控制器(RN〇理解某個媒體存取控制器(MAC) 二重設的需要(步驟12)、並告知這個β節點及使用者設 —(UE^(步驟14及16)後,這個無線網路控制器(燃) 會中止高速下行連結共享頻道(HS — DS⑻的所有下行連 :傳輸(步驟17)。需要注意的是,步驟17亦可以發生在 〔驟14或16以前,並且,不會造成任何負面影響。接著, =固,線網路控制器(RNC)會接收這個封包資料單元⑽) 如(步驟32)°這個封包資料單元⑽)狀態報告 在某個馬速下行連結共享頻道d_)胞元 二”況下,媒體存取控制11 (MAG)層重設所致的封包 貝;斗單7L (PDU) m失及來源β節點的其他封包資料單元 遺失。隨後,独封包㈣單元⑽)狀態報告 :合仃處理(步驟34),並且,這些遺失封包資料單元⑽) 料重新傳輸至物_者設備(UE)(步驟⑹。藉著安 =要百先重新傳輪的遺失封包資料單元(_的重輸時 二這個無線網路控制器⑽)將會啟動新胞元的重輸。 現後,廷個無線網路控制器()會由步驟17停止的先 1257779 前傳輸位置開始,繼續封句咨 ⑻m音^ 1 科早凡(™)傳輸(步驟 ):要庄^的疋’步驟36及38亦可以同時執行。 #參考第4 ® ’其係表示根據本發明第三較佳實施 、=-,方法50。這種方法5G係類似於第3圖所示的方 法40。然而,這種方法π 一 50並不會因應於某個封包資料單 ^ )狀態報告的接收(如第3圖之步驟32所示),進 ==這個高速下行連結共享頻道⑽-晴的下 仃連…傳輸至运個使用者設備(UE)。相對於此,本發明第 三較佳實施_枝5〇會麵蝴目” 個預定事件)後(步驟19),重新開始這 連结 共享頻道⑽-嶋)的下行辆錄。㈣連中: =個觸發信號可咕括:在如行動電㈣統(廳)地 表热線存取網路(UTRAN)的傳輸頻道建立,1可以利用一 個無線網路控制器()的新,,目標,,B節點發送程序加 以達成,如《此技術領域麵知。這__路控制哭 (RNC)接收的一個確認信號(由這個B節點產生)即可以 做為這傭觸發信號。 在第二種例子中,這個觸發信號可以具有這個”同 步”指示的接收及偵測。在這個目標β節點中建立專用資 源時,這個B節點可以,在指派實體頻道決定為可供B節 點傳輸時,決定一個”同步”。這個事件的指示會傳達給 這個恶線網路控制(R【),以及,可以用來做為一個觸 發信號。 在第三種例子中,這個觸發信號可以具有這個無線 22 1257779 資源控制Is (RRC)程序的完成(亦即:這個無線網路控制 器(RNC)接收及這個使用者設備(UE)無線資源控制器(rrc) 訊息的確認信號)。在步驟16中,這個無線資源控制器 (RRC)訊息會產生一個無線資源控制器(RRC)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ϋ (RNG)。當這個紐網路控制器 ()收刺他息時,這個訊息亦可賴為— 號。
應該注意的是,這錢用者錢( 網路控繼⑽〇間亦存在許多不同的 並且、, 使用者亦可能選定任何传梦,兹、 Θ就X且 鲈。ratl· 错从做為本發明的觸發信 唬。因此,先刖所述的三種例子 本發明。無論這_發信號㈣成^來介紹、而非限定 控制器觸收到這個觸發信號後為:個=個無線網路 享頻道⑽-DSCH)的下行 下行連結共 驟21)。 得輸便可以重新開始(步
23 1257779 【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(H 一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); 以及 ~ 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前,這個盔 線網路控制器⑽)係等待-個觸發j I、、 【主要元件符號說明】 22媒體存取控制器層重設及清除記錄緩衝器 RNC無線網路控制器 UE使用者設備 24

Claims (1)

1257779 十、申請專利範圍: 1· 一種快速回復B節點緩衝資料之系统,★ ^ 一無線網路控制器(隨〇,關連於至少一 B節點具有 一 B節點更關連於至少一使用者設備(UE),兮“、、’遠至少 味至少一佶用 者設備(UE)具有至少一記錄缓衝器,藉以緩衝炉^ 線網路控制器(81^)傳送之封包資料單元(1^1/工35亥無 包括: _)’该系統 ()’藉以產生1體存取控制 該無線網路控制器 恭(MAC)層重設通知; 一控制單元,位於該使用者設備(UE)内部,藉以接 收該媒體存取控制器(MAC)層重設通知,並且,清除該至 少一記錄緩衝器; 狀態裝置,位於該使用者設備(UE)内部,藉以在清 除該記錄緩衝器以後,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一 狀態報告;以及 傳輸裝置,藉以將該狀態報告傳輸至該無線網路控制 器(RNC)。 2·如申請專利範圍第1項所述之系統,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)〇 3·如申請專利範圍第2項所述之系統,其中,該控制 25 1257779 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)後產生。 4. 如申請專利範圍第2項所述之系統,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早元(PDU)。 5. 如申請專利範圍第2項所述之系統,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不。 6. 如申請專利範圍第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 生該控制信號。 7. 如申請專利範圍第1項所述之系統,其中,該無線 網路控制器(RNC)係,在產生該媒體存取控制器(MAC) 層重設通知後,中斷資料傳輸。 8. 如申請專利範圍第7項所述之糸統’其中’該無線 網路控制器(RNC)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,在收到一預定觸發信號後,重新啟 動資料傳輸。 10. 如申請專利範圍第9項所述之系統,其中,該預定 觸發信號係該狀態報告之接收。 11. 如申請專利範圍第9項所述之系統,其中,該使用 26 1257779 並且,該預定觸發信號 者設備(UE)係產生—同步指示 係該同步指示之接收。
12 ·種在一系統中高速下行連結共享頻道(η s〜j) s⑻ 胞兀鏠化之方法,該系統具有一遠端無線網路控制器 (RNC),該無線網路控制器(RNC)耦接於至少一 b節點^ 口亥至v B節點更輕接於至少一使用者設備(UE),該至少 /使用者設備(UE)具有至少一記錄緩衝器,藉以緩衝經 由該無線網路控制器(RNC)傳送之封包資料單元(pDu), 該方法係包括: 在該無線網路控制器(冊C)偵測一高速下行連結共享 頻道(HS-DSCH)胞元變化之需要; 、予 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,包括清除該至少一記錄緩 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,藉以產生一狀態報告;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)。 13·如申請專利範圍第12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 該至少一記錄緩衝器已經清除所有封包資料單元(PDU)。 14·如申請專利範圍第13項所述之方法,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 27 1257779 (PDU)結束指示係在該至少一 料單元(PDU)時產生。…κ衝11清除所有封包資 15·如申請專利軸第咖所述之 一記錄緩衝H之-最後封包_單=其巾,該至少 並且’該控制信號係具有該最後 )無二, 16·如申請專利範圍第13項所述之;:早=,。 一記錄緩衝器之該最後封包資料單元該至少 示,並且,該控制信號係具有該特別指示。特別指 17.如申請專利範圍㈣項所述之方法,更 Ξ器已經清除所有封包資料單元_時,細 18·如申請專利範圍第12項所述之方法,更包括 偵測步驟後,中斷資料傳輸。 Μ 仪如申請專利範圍第18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。 20·如申請專利範圍第18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。 21·如申請專利範圍第2〇項所述之方法,其中,該預定 觸發信號係該狀態報告之接收。 22·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。 23· —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, 28 1257779 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 (酬)。 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。
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