TWI275272B - Radio network controller and node-B - Google Patents
Radio network controller and node-B Download PDFInfo
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- TWI275272B TWI275272B TW93105324A TW93105324A TWI275272B TW I275272 B TWI275272 B TW I275272B TW 93105324 A TW93105324 A TW 93105324A TW 93105324 A TW93105324 A TW 93105324A TW I275272 B TWI275272 B TW I275272B
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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
- H04W28/0205—Traffic management, e.g. flow control or congestion control at the air interface
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- 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
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- 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
- H04L47/17—Interaction among intermediate nodes, e.g. hop by hop
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- 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
- H04L47/26—Flow control; Congestion control using explicit feedback to the source, e.g. choke packets
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- 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
- H04L47/26—Flow control; Congestion control using explicit feedback to the source, e.g. choke packets
- H04L47/263—Rate modification at the source after receiving feedback
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
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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
- H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
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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
- H04W28/0247—Traffic management, e.g. flow control or congestion control based on conditions of the access network or the infrastructure network
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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
- H04W28/0278—Traffic management, e.g. flow control or congestion control using buffer status reports
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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
- H04W28/10—Flow control between communication endpoints
- H04W28/14—Flow control between communication endpoints using intermediate storage
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/52—Allocation or scheduling criteria for wireless resources based on load
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- 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]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/04—Interfaces between hierarchically different network devices
- H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Quality & Reliability (AREA)
- Databases & Information Systems (AREA)
- Mobile Radio Communication Systems (AREA)
- Communication Control (AREA)
- Small-Scale Networks (AREA)
- Telephonic Communication Services (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Description
1275272 五、發明說明(1) 發明所屬之技術領域 本發明係關於無線電 明係關於在第三代(3G) 1 =肩域,更特定言之,本發 (R N C )及B節點間資料二、尤中於無線電網路控制器 、了叶得輸流控制之運用 先前技術 一種3G通用地面盔 RNCs ^ (UmN) 一步伴隨著一或更多胞元 B郎點且每一個β節點進 該3G頻分雙工(FDD )及 ^ 使用該RNC以分佈(介 刀雙工(TDD)模式典型上 者設備(UE)的資緩衝及調度)至至少一個使用 道,資料被調度以進〜^…丨而,對3G蜂窩系統的高速通 通道的其中-:為Ϊ:·節點,傳輸。例如,這些高速 料係由該β節點調〜度^,、下订分旱通道(hs—dsch )。因資 UE(s)。 X 須在該B節點緩衝資料以傳輸至該 5夕大里在該β節點緩衝的資料對系絲 負面影響的案例,一此U 貝枓對糸統的整體刼作有 第一個崇彳丨^ 二這二案例將敛述於後。 點對端點資料傳二=公在3G系統的重新傳輸機構以達到端 如,該β節點已再因許多不同的原因。例 定傳輪的傳輸時輸數次而未成功,或者,用於特 涵蓋這些情7 β二、,、失效。更詳細敘述於後的本發明意欲 ' 貧料傳輸的失敗促使無線電連結控制器
1275272
(RLC)重新傳輸的任何其他情況。 重新傳輸機構有許多 。如一個 組接入Γ Ηςηρ a、a # ~门思下仃分 USDPA )的混合自動重發請求(H —ARQ ) ::^-⑽方法提供—種機構,於此錯誤 =傳 ^不給該發射m該發射器重新傳輸該資料皮 被正確接收。 且巧4貝枓 R^mRQ方法外’在該rnc及該ue有實體。該傳送 貝體在特定通訊協定資料單位(PDU)的標頭發出序號
傳_ 4腕其ϊ ΐ收rlc實體使用以確保沒有任何pDus在該 傳輸失聯,右在傳輸期間有PDUs失聯(由PDUs的失序傳送 而知悉),則該接收RLC實體傳送一個狀態報告pDU以通知 該傳运RLC實體某些PDUs為失聯的,該狀態報告pDu敘述成 功及/或不成功資料傳輸的狀態,其辨識已失聯或已接收 PDUs的序號。若PDUs為失聯的,則該傳送rlc實體會重新 傳輸該已失聯PDU的副本至該接收RLC實體。 重新傳輪對系統性能的影響參考第丨圖被敘述。如所 示,當具SN = 3的該PDU未被該UE成功接收時,在該龍内的 該RLC要求在該RNC的其對等實體重新傳輸。同時,具sNs = 6及7的P D U s在該B節點的緩衝器排列。 ^參考第2圖,因重新傳輸方法需要一些時間且資料持 續被傳輸,多兩個具SNs = 8及9的PDUs已在具SNs = 6及7的 PDUs之後排列,且在具SN = 3的已重新傳輸PDU前。具SN = 3 的該PDU必須等待直到具SNs = 6 —9的⑼以已被傳輸至該UE。 此外,因至較高層的資料依序傳送之要求,具SNs = 4-9的
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PDUs不會通過較高層直到 依序傳送可被進行。 具SN = 3的該PDU被接收且資料的
該UE被要求緩衝該失序 輸。此不僅造成傳輸的延遲 能夠進行持續資料接收的資 功地重新傳輸。否則,有效 影響服務品質。因記憶體為 限制。因此,此第一個案例 節點緩衝的大量資料造成較 記憶體要求。
資料直到失聯的PDU可被傳 ,亦需要該UE具足夠的記憶體 料緩衝直到已失聯資料可被成 的資料傳輸速度被降低,因而 非常昂貴的,此為不欲的設計 為當需要RLC重新傳輸且在該B 大的資料傳輸延遲及較高的UE
弟一茶例為當在該β節點資料的緩衝負面地影響系 、,ί生月匕為層2 ( L 2 )或層3 ( L 3 )訊號及資料傳輸由相同調 ,方法進行或分享在該Β節點的單一緩衝器之情況。雖然 二料被緩衝及進行且L2/3訊號在其後,但訊號無法繞過傳 輸排列。在傳輸緩衝器内的資料量愈大(其以先入先出 jFIFO)緩衝器操作),L2/3訊號或資料通過該緩衝器的 犄間愈長。任何高優先順序的L2 / 3訊號因在該緩衝器的資 料而被延遲。 、
第二個案例當在該β節點資料的緩衝負面地影響系統 性能係因伺服HS-DSCH胞元變化的情況。因該Β節點執行 HS-DSCH資料的調度及緩衝,當該UE執行自來源Β節點至目 標Β節點的伺服hs —DSCH胞元變化,有一種可能為在交接後 相當量的資料仍在來源Β節點被緩衝,此資料為不能回復 的因當自來源Β節點要被傳輸至目標Β節點在UTRAN結構内
B· 1275272
=貝料緩衝的機構。當伺服⑽―Dsc{i胞元變化時,該㈣c 何,於多少資料(若有時)遺失的信息,因該RNC ^可種貧料在該來源B節點被緩衝。在HS —DSCH胞元變化 :=況,在該B節點被緩衝的資料量愈大,最終被滯留在 以Λ =、B即點且必須被重新傳輸的資料量愈大。 呈因此’對上述原因希望限制在該B節點缓衝的資料 内容 的資種藉由聰明地使用在該及在節點間 :控制以改善無線通信系統的性能之系統及方 WncH統監測某些準則且若必須時適當地增加或減少在 i料流° 允許重新傳輪的資 步驟及其他要以較先前技藝系統S快的速ΐ f ^ &的貪料,藉由減少在該Β節點緩衝的資料量來V" 良傳輸糸統的性能。當通道品質降 :+里來改 用以”在該B節點的緩衝且咖交2^制破運 在較佳具體實施例中,本發明於包含 ρ、目丨 求“RNC迗出一定篁的賁料至該Β節點。今Β〜 •、、、占^測所選擇的品質指示符及基於 :以郎 計算緩衝器的容量分佈。該B節點將容斤量^布的訊叩質= RNC。為回應該容量分佈的接收,該RNC以根據該=量分^
1275272 五、發明說明(5) 所決定的資料流速率傳輸資料至該B節點。 實施方式 本發明係參考圖式敘述之,其中相同數字表示相同元 件。雖然本發明以參考排列於緩衝器特定數目的pDUs (如 數十PD Us )而被敘述,此提及的pous數目僅為簡化用途, 根據先前案例被傳輸及緩衝的PDUs實際數目更可能在數百 PDUs或更多。本發明及其意旨意欲適用於任何數目的pDUs 及任何尺寸傳輸緩衝器。 一般,當該UE的通道品質降級時,對UE本發明減少至 該B節點的資料流,且該UE的通道品質改良時,增加至該b 節點的資料流。為控制在該RNC及在該B節點間的資料傳輸 流’本發明監測一或更多通道品質的參數,此資料流控制 為可基於一個準則或是許多不同準則的組合。此外,如於 下文更詳細說明,該準則可由該B節點内部地產生,或是 可由外部實體產生(如該UE ),並傳送至該B節點。 參考第3 A圖,根據本發明監測通信通道品質及調整在 該RNC 52及在該B節點54間的資料流之方法50被示出。此 方法5 0處理在該r N C 5 2及在該B節點5 4間的資料傳輸,該 RNC 52傳輸一容量要求至該b節點54 (步驟58 )。基本上 該容量要求為自該RNC 52至該B節點54的要求使該RNC 52 送出一定量的資料至該B節點54,該B節點54接收此容量要 求及監測所選擇的品質指示符(步驟6 〇 )。此所選擇的品 質指示符可基於自該UE傳輸的資料(於後文詳細說明),
1275272 五、發明說明(6) 或是可基於内部產生的品質指示符,如在該B節點54緩衝 器的深度。 该B節點5 4亦監測在該B節點内緩衝器的狀態(步驟 6 2J> 。如可由熟知本技藝者了解,雖然本發明以參考在該 B節點5 4内的單一緩衝器敘述以簡化,大部份該緩衝器包 括許多緩衝器或是被分成許多子緩衝器的單一緩衝器,每 一個緩衝器或子緩衝器被分配有一或更多資料流。無論是 =有:或多個多重緩衝器,一種顯示在緩衝器内資料量的 指不符在該B節點内内部地產生。此使得該B節點54監測在 緩衝器内的資料量,及亦可監測該緩衝器可接受的 料量。 、1貝 该B响點54計算並傳輸一種容量分佈(步驟64 )至該 RNC 52,該容量分佈由該B節點54授權以允許該RNC 52送 出一定量的資料。在接收該容量分佈時,該RNc 52根 分〜佈傳輸資料(步驟66),亦即,該RNC52傳輸資料至^ B即」點5Ί一里不超過該容量分佈。而後該β節點據以調= ,、緩衝器以容納及儲存該資料(步驟69)。儲存於該 =的資料量會依據由52傳輸的進至 UE 示於第3B圖)的送出資料來變化。 寻翰至邊 熟知本技藝者會欣喜的是當資料流由該RNC: 52至 郎點54,及當該流速連續由該”點“ 第亥 圖的方法5。可固定地被重覆。亦應注意方法步驟5δ、、?〇Α 62 : 64、66及69不必要依序執行,且在方法5 被施用丽任何一個步驟可被施用多次。此外,一些:驟驟
第10頁 1275272 五、發明說明(7) 如容量分佈步驟64,可顯示重覆的資料分佈使得資料傳輪 (步驟66 )可被定期地進行。 參考第3B圖,根據本發明監測該B節點54及該UE 82間 的通信通道品質之方法8 0被示出。該B節點5 4傳輸資料至 該UE 8 2 (步驟8 4 )。該UE 8 2接收此資料及傳輸一訊號品 質指示符(步驟8 6 ),例如通道品質指標(CQ I )至該B節 點5 4。此訊號品質指不符再被用做苐3 A圖步驟6 〇中的所選 擇品質指示符。 、 可由熟知本技藝者注意的是方法步驟8 4及8 6不必要依 序執行,例如,在FDD模式,無論是否資料被傳輸,訊號 口口貝指不符為定期自該U E 8 2傳送’在此情況下,該u e 8 2 可定期地或為回應特定事件傳輸一訊號品質指示符至該B 卽點5 4 ’該訊號品質指示符再被用做第3 A圖步驟6 〇中的所 選擇品質指不符。 如上所述’该所選擇品質指示符可由該B節點内部地 產生,或者由另一實體(如該UE )外部地產生並送至該B 節點。根據第一具體實施例,準則為自該UE的通道品質回 饋。在此具體實施例’為下行通道品質的指標的CQ I被使 用。 在第二具體實施例’準則為該UE根據該h —ARq方法所 產生的ACK或NACK。例如,在一段時間,ACKs的數目及/或 NACKs的數目可被用來得到通道品質的指標。 在第二具體實施例,準則為該β節點選擇的調變及編 碼組(MCS )’其是需要的以成功地傳輪資料。如可由熟
1275272 五、發明說明(8) 知本技I,所了解當通道條件為差的日寺,非常強烈的似 被使用> 1 ί /、當通道條件為良好時,較不強烈的MCS被 使用且里賢料被傳輸。最強烈的MCS組之選擇可被使用 :為差白道品質條件之㈣,但最不強烈 象徵通道品質條件為佳的。 在第四具體貫施例’準則為在該β節點傳輸缓衝器内 广:2 j = Ue)、之深度。例如,若該Β節點54緩衝器目前儲 在該β^τ貞點僂於通縫道二質條件的指標可能是差的’因該資料 可=、畜卩酋口所剧欠’衝器被’’向後移動,’。些微負載的緩衝器 月匕k = 口口貝條件為良好的指標且資料未向後移動。 旦。ί : ΐ f體實施例,準則為”落”在該β節點的資料 ί重新傳於f t本技藝者所了解掉落的資料為該Β節點企 條件為差的指標。 此為通道口口貝 百急ΐ第ΐ具體實施例,準則為在預先決定時間(例如一 質。’::工節點傳輸的資料量。依通訊通道的品 定的時的PDUs數目可變化。雖然預先決 間2 了被固疋,因改變通道品質條件,在預弁Μ # 間内可被傳輸的PDUs量可被顯荖改蠻。如丄預先决疋% 條件為佳的,一百個二被顯者改t例如,若通道品質 時間内件非常差’僅十刪US可在-百秒的 熟知本技藝者應了解可直接或間接顯示通道條件的其
第12頁 然而,若通、f σ s可在一百笔秒的時間内被傳輸; 1275272
他準則可根據本發明被利用。此外,依系統使用者的特定 需求’二或更多上述準則的組合可據此被利用或權重。疋 參考第4圖,適當控制在該RNC及在該B節點間的資料 流之益處可被看出。該實例為因失敗傳輸而需要重新傳輸 且在該RNC及在該B節點間的資料流被減少之案例。資料^ 減少的結果為僅一個額外具SN=8 wpDU在具SN=3的已重新L 傳輸PDU之前排列。如第4圖所示,與第2圖(具SNs = 8的 PMs,在具SN = 3的PDU之前排列)所示的先前技藝處理 較’貧料流控制之運用減少具㈣=3的PDU之重新傳 ,•因此,、具SN = 3的PM可被早點重新傳輸至該肫。’該 士傳迗要求產生更快的處理及pDUs 4至8至較高層之傳 具體貫施例敛述,在如下文申請 範圍内的其他變化為熟知本技藝 僅管本發明已以較佳 專利範圍所列出的本發明 者明顯易見的。
第13頁 1275272 圖式簡單說明 第1圖顯不在該R N C、該B節點、及該U E的貧料之先前技藝 緩衝。 第2圖顯示在重新傳輸情況下,在該R N C、該B節點、及該 UE的資料之先前技藝緩衝。 第3 A及3B圖共同為根據本發明方法監測通道品質及調整在 該R N C及在該B節點間的貢料流。 第4圖為使用第3A及3B圖的方法,在重新傳輸情況下,在 該R N C、該B節點、及該U E的資料之緩衝。
元件符號說明 52 RNC 54 B節點 60 步驟 64 容量分佈步驟
58 > 60、62、64、66、69、84 及 86 方法步驟 82 UE
第14頁
Claims (1)
1275272 六、申請專利範圍 1· 一種無線電網路控制器(RNC),其包含: (a)用以發出該RNC發送一定量資料至 要求給—記憶裝置之裝置; “己以置之一 (C)用以根據該資料容量分佈與至少—預 所決定資料流速而傳輸資料至該記憶裝置之爭置、 、 2且圍第1項所述之無線電網路控制器。(厦), 其中該記憶裝置係為一 B節點。 3. 如申請專利範圍第2項所述之無線電網路 其中該B節點包含·· f!加(RNC) (i )至少一緩衝器,用以儲存資料; (i i)用以從該RNC接收〆訊號其要i _ 聲衣該RNC發送一定量 資料至該B節點之裝置; s (i i i)用以監測一選定品質指示符之事置· (i v )用以基於該選定指示符計算哕绘1 w ’ %該綾衝器的一容量分 佈之裝置, (v)用以將該容量分佈發出訊號至該RNC之巧置; (v i )用以根據該容量分佈與至少_ $ ' 里 t 夕 預先決定準則所決 定資料流速而從該RNC接收資料之裝置;以及 (v i i)用以相應地調整該緩衝器之裝置。 4. 如申請專利範i第3項所述之無、缘電網路控制器(r , 其中該選〃定品質j旨示符係基於從至少—使用者設備(ue)傳 輸至該B卽點的資料。
1275272
六、申請專利範圍 5 ·如申請專利範圍第4項所述之無線電網路控制哭(RNC ), 其中該選定品質指示符係為,通道品質指標(CQ1 ),其 指示在該UE及該β節點間所建立的一下行通道的品質。八 6.如申請專利範圍第4項所述之無線電網路控制:(RNC), 其中該至少一預先決定準則係基於該UE根據—混°合自動重 發請求(H-ARQ)所產生的/ ACK或NACK。 7 ·如申二專利範圍第3項所述之無線電網路控制器(r n c ), 其中該資料流速係增加以商應該選定品質指示符之一改 I t «I ί Ϊ 7乾圍第3項所述之無線電網路控制器(RNC), 八中5亥1疋⑽質指示符係由該B節點於内部所產生。 申:ΐ ^範園第3項所述之無線電網路控制器 擇的詷、變/亥始至少—預先決定準則係基於由該Β節點所選 擇的一调變及編碼組(Mcs)。 1A申:f辜、圍第3項所述之無線電網路控制器 ^ ^至少一預先決定準則係基於該緩衝器内的 一仔列(queue)之深度。 c申i Ϊ 2範圍第3項所述之無線電網路控制器 資料量’ /、〜至少一預先決定準則係基於落在該B節點的
第16頁 1275272
六、申請專利範圍 (RNC),其中該至少一預先決定準則係基於在預先決定护 間内可由該β節點所傳輸的資料量。 、疋寸 1 4· 一種Β節點,其包含: (i )至少一緩衝器,用以儲存資料; (i i)用以從一無線電網路控制器(RNC)接收一訊號其 要求該RNC發送一定量資料至該B節點之裝置; 儿八 (i i i )用以監測一選定品質指示符之裝置; (i v)用以基於該選定指示符計算該緩衝器的一六旦八 佈之裝置; - 合里刀 (v )用以將該容量分佈發出訊號至該㈣c之裝置· (Vi )用以根據該容量分佈與至少一預先決^準則所決 定資料流速而從該RNC接收資料之裝置;以及 (v i i )用以相應地調整該緩衝器之袭置。 1 5 ·如申請專利範圍第1 4項所述之B節點,其中★亥選定。質 指示符係基於從至少一使用者設備(u E )傳輸至=點°°的3 資料。 1 6·如申請專利範圍第1 5項所述之B節點,其中$選定品f 指示符係為一通道品質指標(CQ I ),复指 ?日不在該UE及該B 節點間所建立的一下行通道的品質。 1 7 ·如申請專利範圍第1 5項所述之B節點,其中談至少_預 先決定準則係基於該U E根據一混合自動重發社^ (η 、 ARQ)所產生的一 ACK或NACK。 》 18.如申請專利範圍第14項所述之Β節點,其中該資料流速 係增加以回應該選定品質指不符之一改呈。 、
1275272 六、申請專利範圍 1 9.如申請專利範圍第1 4項所述之B節點,其中該資料流速 係減少以回應該選定品質指示符之一降級。 2 0.如申請專利範圍第1 4項所述之B節點,其中該選定品質 指示符係由該B節點於内部所產生。 2 1.如申請專利範圍第1 4項所述之B節點,其中該至少一預 先決定準則係基於由該B節點所選擇的一調變及編碼組 (MCS ) ° 2 2.如申請專利範圍第3項所述之B節點,其中該至少一預 先決定準則係基於該緩衝器内的一佇列(queue)之深度。
2 3.如申請專利範圍第1 4項所述之B節點,其中該至少一預 先決定準則係基於落在該B節點的資料量。 2 4.如申請專利範圍第1 4項所述之B節點,其中該至少一預 先決定準則係基於在預先決定時間内可由該B節點所傳輸 的資料量。
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