TWI360976B - Power control using erasure techniques - Google Patents
Power control using erasure techniques Download PDFInfo
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- 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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H—ELECTRICITY
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- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/12—Outer and inner loops
- H04W52/125—Outer and inner loops cascaded outer loop power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/20—TPC being performed according to specific parameters using error rate
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Description
1360976 九、發明說明: 【發明所屬之技術領域】 本發明大體係關於資料通信’且更具體言之係關於用於 在無線通信系統中執行抹除偵測及功率控制的技術。 【先前技術】 無線多重存取通信系統可同時支持對於多個無線終端機 的通信。每一終端機經由正向鏈路及反向鏈路上之傳輸而 與—或多個基地台通信。正向鏈路(或下行鏈路)係指自美 地台至終端機之通信鏈路,且反向鏈路(或上行鏈路)係= 自終端機至基地台之通信鏈路。 藉由使多個終端機之傳輸多工為彼此正交,多個終端機 可同時於反向鏈路上傳輸。該多工試圖於多個反向鍵路傳 輸間達成時間、頻率及/或程式碼領域之正交性。完全正 交性(若達成)導致-接收基地台處來自每一終端機=輸 不干擾來自其它終端機之傳輸。然而,歸因於通道條件、 接收器缺陷等,經常無法實現來自不同終端機之傳輸間的 完全正交性。正交性之損失導致每—終端機引起對其它终 端機的一定量之+语。妙w么、 疋里之干擾。然後來自所有其它終端機之 母一終端機之效能降級。 在反向鏈路上’可使用_功率控制機製來 機之傳輸功率以確保所有終端機之良好效能。、兩= 功率控制循環來實施此功率控制機製,該等循環;= "内,.循環及”外”•内循環調節終端機 稱: 使得接收基地台處所量測之其已接收訊號品質心 102551.doc 1360976 於目標識。外猶環調節目標隨,以維持所要之區塊誤 差率(BLER)或封包誤差率(pER)。 習知功率控制機f調節每—終端機之傳輸功率,以使得 對於來自终端機之反向鏈路傳輸達錢要之區塊/封包誤 差率。通常使用諸如猶環冗餘校驗(CRC)碼之誤差價測碼 來判定每-已接收資料㈣/封包得以正確解碼還是錯誤 解碼。㈣基於誤㈣測解碼之結果而相應地調節目標 隨。然而’誤差偵測碼不可用於一些傳輸,例如若認為 誤差㈣碼之耗用過度。依賴於誤差制碼之習知功率控 制機製不可直接用於此等傳輸。 、因此,當不使用誤差偵測編碼時,先前技術中需要用以 適當調節用於一傳輸的傳輸功率的技術。 【發明内容】 本文描述用於對"實體"通道(例如控制通道或資料通道) 上之不使用誤差㈣編碼之傳輸執行抹除㈣及功率斤 ㈣㈣。資料在實體通道上作為,,碼字組,,傳輸,其中^ -碼字組可為—區塊之已編碼或未編碼之資料。 對於抹除偵測而言,一傳輸實體(例如無線終端機)於實 體通道上且經由-無線通道將竭字組傳輸至—接 基地台)。如以下描述,基地台為每一已接收碼字組 =-量度’ 2比較所計算之量度與一抹除臨限值。基地 二衿比較結果而宣佈每_已接收碼字組為”已抹除"碼字 :或”未抹除,,碼字組。基地台動態地調節抹除臨限值以達 成目標效能等、級,其可由目標條件誤差率加以量化,當一 102551.doc 率指示已接收碼宝,^ 子,·且時’该目標條件誤差 ‘·~ ,、且破錯誤解碼的機率。如以下y ,f 基於已接收如以下描述,可 t子組而調節抹除臨限值,唁等已接收 之已知碼字組為用於與 1 Μ已接收 碼字組的已接收碼字端機所傳輸之已知 道條件下提 ㈤#之抹除臨限值可於各種通 供穩固之抹除偵測效能。 可使用一具有三個 M if ^ τΛ Φ 内循裱、一外循環及一第三 。控制機製來控制用於實體通道之傳輸功率。 =節用於實體通道之傳輸功率以維持:接=處 =:或接近於該目標贿。外循環基於已接收碼字 :(已抹除或未抹除)而調節目標歡以達成目標抹 厂Ά目標抹除率為宣佈—已接收碼字組為已抹除碼字 好,· ”弟—循祓基於已接收之已知碼字組之狀態(··良 子不良,或已抹除)而調節抹除臨限值以達成目標條 件誤差率。目標抹除率及目標條件誤差率為實 能之兩個量測。 以下進一步詳細描述本發明之各種態樣及實施例。 【實施方式】 詞”例示性"用在本文中意謂,,充當實例、例子或說明"。 在本文中描述為"例示性"的任一實施例或設計不一定被解 釋為相對於其它實施例或設計而較佳或有利。 :圖1展不一無線多向近接通信系統100。系統1 〇〇包括若 干基地D 11 〇,g亥等基地台支持若干無線終端機i 2〇之通 基地台為用於與終端機通信的固定台且亦可將其稱為 102551 .doc 1360976 存取點、即點B,或某其它術語。終端機12〇 一般遍佈於整 個糸I且母終端機可為固定的或行動的。終端機亦可 桩稱為行動台、使用者設備(UE)、無線通信設備,或某其 匕術。在任一特定時刻,每一终端機可在正向鏈路及反 向鏈路上與一或多個基地台通信。此視該終端機是否在作 用中、是否支持軟式交遞及該終端機是否處於軟式交遞過 程中而疋為簡明起見,圖1僅展示反向鏈路上之傳輸。 一系統控制器13 〇輕接至基地台i J 〇 ;對此等基地台提供協 調及控制;並進-步控制用於此等基地台所伺服之終端機 的資料路由》 ' 本文所描述之抹除偵測及功率控制技術可用於各種無線 通信系統。舉例而t,此等技術可用於劃碼多向近接 (CDMA)系統、劃時多向近接(TDMA)系統、劃頻多向近接 (FDMA)系統、正交劃頻多向近接(〇FDMA)系統,等等。 CDMA系統使用劃碼多王,且藉由將不同正交(例如偏叫 碼用於反向鏈路而使得不同终端機的傳輸正交。該等終端 機將不同僞隨機數(PN)序列用於CDMA中之反向鏈路且^ 此不完全正交。TDMA系統使用劃時多工,且藉由在不同 時間間隔中傳輸而使得用於不同終端機的傳輸正交。 FDMA系統使用劃頻多工,且藉由在不同次頻帶中傳輸而 使得不同終端機的傳輸正交。〇FDMA系統使用正交劃頻 多工(OFDM),其有效地將整偭系統頻寬分割為若干正交 之次頻帶。此等次頻帶一般亦被稱為音調、次載波、貯藏 器(bin)及頻率通道。0FDMA系統可使用各種正交多工方 10255 丨.doc 1360976 案且可使用劃時多工、劃頻多工及/或劃碼多工之任一組 合。 本文所描述之技術可用於不使用誤差偵測編碼的各種類 型之"實體"通道。亦可將實體通道稱為編碼通道、傳送通 道’或某其它術語。實體通道一般包括用於發送訊務/封 包資料的"資料,I通道及用於發送耗用/控制資料的"控制,,通 道。系統可使用不同控制通道來發送不同類型之控制資 • 訊。舉例而言,系統可使用(1)(:(51通道來發送指示無線通 道之品質的通道品質指示符(CQI) ; (2)ACK通道來發送對 混合自動重傳(H-ARQ)方案的確認(ACK) ; (3)REQ通道來 發送用於對資料傳輸的請求,等等。即使未使用誤差偵測 編碼,實體通道亦可使用或不使用其它類型之編碼。舉例 而5 ,實體通道可不使用任一編碼,且於實體通道上"不 受阻礙地,,發送資料。實體通道亦可使用區塊編碼,以便 將每一區塊之資料編碼以獲得一相應區塊之編碼資料,然 馨後於實體通道上將其發送。本文所描述之技術可用於任— 或所有此等不同實體(資料及控制)通道。 為清晰減’以下特定地描述抹除偵測及功率控制技術 用於反向鏈路所使用之—例示性控制通道。此控制通道上 來自不同終端機之傳輸可在頻率、時間 方面經正交多工。在完全正交之情況下,控制通道上每一 終端機不會觀察到任何干擾 > — 1 丁復然而,由於存在頻率選擇性 衣落(或越過系統頻寬的頻率0庙微儿、^ ^ 领手口應變化)及Doppler效應(歸 因於移動)’自不同終端機之僂鈐 現I得輸在接收基地台處可能不 I02551.doc 1360976 彼此正交。 資料在例示性控制通道上以區塊之形式發送,每一區塊 包含一預定數目(L)之資料位元。使用—區塊碼將每一資 料區塊編碼以獲得一相應碼字組或編碼資料區塊。約為每 一資料區塊包含1^個位元,所以有2l個可能之不同資料區 塊,其被映射至一編碼薄中之妙個可能之碼字組,—碣字 組用於每一不同資料區塊。終端機於控制通道上傳輸用於 資料區塊之碼字組。 •基地台藉由不同終端機來接收控制通道上所傳輸 組。基地台對於每-已接收碼字組執行補充區塊解碼以獲 得一解碼資料區塊’該解碼資料區塊是被認為最有可能已 傳輸用於該已接收之碼字組的資料區塊。可以各種方式執 行區塊解碼。舉例而言,基地台可計算已接收碼字組與編 碼薄中之妙個可能有效碼字組之每—者之間的 Eudidean(歐幾裏德)距離。通常,已接收碼字組與一特定 馨有效碼字組愈接近’則已接收碼字組與有效碼字組之間的 Euclidean距離愈短,而已接收碼字組離有效碼字組愈遠, 則已接收碼字組與有效碼字組之間的Euclidean距離愈長。 將對應於具有至已接收碼字組之最短Eudidean距離的有效 碼字組的資料區塊提供為用於已接收碼字組之解碼資料區 塊。 - 作為一實例,可將用於一資料區塊之[個資料位元映射 至一碼子組,泫碼字組包含用於一特定調變方案(例如 BPSK、QPSK、M_PSK、Μ-QAM等等)之K個調變符號。每 J02551.doc 1360976 有效碼字組與一組不同之尺個調變符號相關,且用於2l 個可能之有效碼字組的2l個組之調變符號可被選擇為彼此 盡可能遠離(相距Euclidean距離)。然後一已接收碼字組包 含K個已接收符號,其中每一已接收符號為一已傳輸調變 符號之一有雜訊之版本。已接收碼字組與一特定有效碼字 組之間的Euclidean距離可按下式來計算: ^W=^Efe0)-^0))2 式⑴ 其中為用於已接收碼字組k之第』個已接收符號;
Si⑴為用於有效碼字組i之第j個調變符號;且 山⑻為已接收碼字組k與有效碼字組i之間的^距 離。 式(丨)將EucHdean距離計算為用於已接收碼字組的κ個已 接收符號與用於有效媽字組㈣個調變符號之間之均方誤 差。將對應於具有最小di(k)的有效碼字組的資料區塊提供 為用於已接收碼字組之解碼資料區塊。 沒有誤差债測碼’便沒有直接方式來判定一特定已接收 碼字組之區塊解媽是正確還是錯誤,且解碼資料區塊的確 為已傳輸資料區塊。可定義一量度且使用其來提供對解碼 結果之可信度的一指示。在一實施例中,_量度可定義如 下: 式(2) 其中㈣為已接收碼字組k與最近之有效碼字組之間的 Euclidean距離; 102551.doc 12 已接收碼字組k與下—最近之有效碼字組之間的 Euclidean距離;且 讲㈨為用於已接收碼字組k之量度。 若已接收碼字組相 下最近之碼字組而更加接近於最 f碼字組,則量較小值轉碼資料區塊正確的可 m級較…相反地’若已接收碼字組與最近碼字組之
距離近似等於其盘下一爭、安々成〜A /、 最近之碼子組之距離,則量度所⑻ 或雄J 1 ’且解碼資料區塊正確的可信度較低。 式(2)展示一基於EucUdean距離之比率的例示性量度, :該量度可用於判定—特定已接收碼字組之區塊解碼是正 還是錯誤。其它量度亦可用於抹除制,且此在本發明 之範疇内。通常,可其^ 曰 了基於任一適當可靠性函數/hCj而定 一量度’其中Γ為已接收石馬字組且C為編碼薄或所有可能 之碼^且之集合。函數/㈣應可指示已接收竭字組之品 質可罪I·生且應具有適當特徵(例如债測可靠性無變化)。 可執行抹除制來判定每一已接收碼字組之解碼結果是 否達到預定之可信度等級。可比較用於已接收碣字組之= 度所W與抹除臨限值ΤΗ—,以獲得對於該已接= 組之解碼決策,如下: m(k)<THerasure,宣佈未抹除碼字組, m(k) 2 TH_e,宣佈已抹除碼字組。 式(3) 如式(3)中展示,⑴若晋^丨# &斗、丄^ 右里度m㈨專於或大於抹除臨限 值,則宣佈I亥已接收碼字組為"已抹除,•碼字組;且⑺若量 度_小於抹除臨限值,則宣佈該已接收碼字組為^抹 102551.doc 13 !36〇976 除m基地台可以不同方式處理用於未抹除碼字組 及已抹除财組的解碼資料區塊。舉例而t,基地台可將 用於未抹除碼字組之解碼f料區塊用於隨後處理,而丢棄 用於已抹除碼字組之解碼資料區塊。
:將宣佈-已接收碼字組為已抹除碼字組之機率稱為抹除 率且將其表不為Pi*ei_asiue。抹除率視用於抹除㈣之抹除臨 :值及用於„亥已接收碼字組之已接收訊號品質(S皿)而 定。訊號品質可由訊雜比、訊雜干擾比等加以量化。對於 4,疋已接收SNR而言,較低抹除臨限值會增大已 字組被宣佈為已抹除竭字組的機率,且反之亦然。對於一 特定抹除臨限值而·r ’較低已接收SNR亦會增大已接收碼 字組被宣佈為已抹除財組的機率,且反之亦然。對於一 特定㈣臨限值而言,可設定(如以下所描述,藉由控制 用於控制通道的傳輸功率)已接收隨以達成所要之抹除 率。 可設定抹除臨限值以達成控制通道所要之效能。舉例而 言,以未抹除碼字組為條件之誤錢率(稱為條件誤差率) 可用於控制通道。將此條件誤差率表示為pr 一且其意謂 士下H又6接收碼字組被宣佈為未抹除碼字組,則用 於該已接收碼字組之解碼資料區塊不正確的機率為 Pre,。當宣佈未抹除碼字組時’較低之U例如_ (M%)對應於解碼結果之較高可信度H可#㈣㈣ 1 erroi 重要的許多類型之傳輪需要較低之pw。可將抹除臨限 值设定為適當專級以達成所需之p r 102551.doc 14 可希望良好定義之關係存在於抹除㈣⑽叩、條件誤差 率咖、#除臨限值TH—及已接收遞之間。詳古 之,對於一特定抹除臨限值及—特定已接收SNR而言,存 在特殊袜除率及-特殊條件誤差率。藉由改變抹除臨限 值,可於抹除率與條件誤差率之間做出折衷。可執行電腦 或做出實驗性置測來判定或預測對於不同抹除臨 二值及不同已接收㈣的抹除率與條件誤差率之間的關 係0
然而’在實際系統中,此等四個參數之間的關係不可預 先得知且其可視配置情況而定。舉例而言,可㈣所要之 抹’于、率及條件#差率的特殊抹除臨限值不可預先得知且其 甚至隨時間流逝而改變,但可能較慢。此外,不知道經由 模擬或藉由其它方法所獲得之抹除率與條件誤差率之間的 "預測"關係在實際配置中是否仍將是正確的。
可使用—功率&制機冑來動態地言周節抹除臨限值及已接 收SNR ’以達成控制通道所要之效能。可由目標抹除率 Prerasure(例如1G%之抹除率,或Ρ“〇·1)及目標條件誤 差率1^_(例如1%之條件誤差率,或υ叫意即 (Prerasure,prerr()r)對,來量化控制通道效能。 圖2展示一功率控制機製2〇〇,其用於動態地調節抹除臨 限值並控制用於在該控制通道上自終端機發送至基地台之 傳輸的傳輸功率。功率控制機製200包括一内循環21〇、一 外循環220及一第三循環23〇。 内循% 210試圖維持基地台處所量測之用於傳輸的已接 J02551.doc 15 1360976 收SNR盡可能接近目標SNR。對於内循環210而言,為出基 地台處之一 SNR估算器242估算用於傳輸之已接收SNR且將 該已接收SNR提供至一傳輸功率控制(TPC)發生器244。 TPC發生器244亦接收用於該控制通道之目標SNR ;比較已 接收SNR與目標SNR ;並基於比較結果而產生TPC指令。 每一 TPC指令為(1)使控制通道的傳輸功率增大之UP(上行) 指令’或(2)使傳輸功率減小之DOWN(下行)指令。基地台 在正向鏈路(雲狀物260)將TPC指令傳輪至終端機。 終端機接收並處理來自基地台之正向鏈路傳輸且將•'已 接收"TPC指令提供至一 TPC處理器262。每一已接收TPC指 令為由基地台所發送之TPC指令的一有雜訊之版本。TPC 處理器262偵測每一已接收TPC指令且獲得一 TPC決策, ⑴若認為已接收TPC指令為UP指令,則該TPC決策為UP決 策’或(2)若認為已接收TPC指令為DOWN指令,則該TPC 決策為DOWN決策。 一傳輸(TX)功率調節單元264基於來自TPC處理器262之 TPC決策而調節用於該控制通道上之傳輸的傳輸功率。單 元264可如下調節傳輸功率:
Pc〇h(n + l) 式⑷ [Pcch(n) + APup 對於 UP決策, [Pcch(n)-APdn 對於 DOWN決策, 其中PCCh (η)為用於内循環更新間隔η之傳輸功率; △ Pup為用於傳輸功率之上行步進大小(up step size);且 △ Pdn為用於傳輸功率之下行步進大小。 傳輸功率PCCh(n)及步進大小及ΔΡ{ΐη以分貝(dB)為單 102551.doc 16 1360976 位。如式⑷中展示,傳輸功率對於每一 up決策增大 △Pup ’而對於每一d〇wn決策減小。儘管為了簡易起 見上文中未加以描述’但是若認為已接收TPC指令太不可 靠,則TPC決策亦可為"非操作性(n〇〇p)"決策在該種情 況下傳輸功率可維持於相同等級,或Pcc“n+1)=pcch(n)e △Pup及^步進大小一般相等,且皆被設定為i 〇 dB、〇5 dB或某其它值。 歸因於反向鏈路(雲狀物24〇)上之路徑損耗、衰落、及 多路徑效應(其一般隨時間流逝而變化且對於行動終端機 而言尤其如此),用於控制通道上之傳輸的已接收snr不斷 地波動。在反向鏈路通道條件存在變化的情況下,内循環 210試圖維持已接收SNR處於目標SNR處或接近於目標 SNR。 ^ 外循環220不斷地調節目標SNR,以便為控制通道達成 目標抹除率。如以上描述,一量度計算單元252計算用於 • 自該控制通道所獲得之每一已接收碼字組的量度。— 抹除❹】器254基於料字組之已計#量度_及抹除: 限值而對每一已接收碼字組執行抹除偵測,且將已接收碼 字組之狀態(已抹除或未抹除)提供至一目標s N R調節單^ 256 ° 目標SNR調節單元256獲得每一已接收碼字組之狀態且 調節用於該控制通道之目標SNR,如下: SNR (k + Π = iSNR,㈣(k) + △說'",對於已抹除碼字组 ,對於未抹除碼字組 式(5) 102551.doc •17· 1360976 其中SNRtarget(k)為用於外循環更新間隔k之目標snr ; △ SNRup為用於目標SNR之增大步進大小;且 △ SNRdn為用於目標snr之下行步進大小。
目標SNR SNRtarget(k)及步進大小副^與Δ8Ν]^以犯 為早位°如式(5)中展示,m -已接收碼字組為未抹除 碼字組,其指示用於該控制通道之已接收SNR高於所需, 則單元256將目“ SNR減小ASNRdn。相反地,若認為一已 接收碼子組為已抹除瑪字組,其指示用於該控制通道之已 接收SNR低於所需,則單元256將目標SNR增大。 用於調節目標SNR之娜!^及細^步進大小可基P於以 下關係來設定: =咖Rd„
式(6)
舉例而言,若用於該控制通道之目標抹除率為1〇%(或 Prerasure = 〇.〗),則上行步進大小為下行步進大小之9倍(或 △SNRup=Wdn)。若將上行步進大小選擇為〇 $分貝 ㈣,則下行步進大小約為〇 〇56犯。△魏叫及綱^之 較大值會加速外循環220之收斂率。綱%之較大值亦使 得處於穩定狀態之目標SNR更多地波動或變化。 第三循環230動態地調節抹除臨限值,以便為控制通道 達成目標條件誤差率 '終端機可於該控制通道上週期性地 傳輸-已知碼字組或無論何時經觸發便傳輸該已知碼字 組。基地台接收經傳輸之已知碼字組。量度計曾單元M2 及抹除们則器254基於抹除臨限值且以與用^已开接早收疋碼字 102551.doc •18· 1360976 組之相同方式來對每一已接收之已知碼字組執行抹除偵 測。對於被認為是未抹除的每一已接收碼字組而言,—解 碼器262將該已接收之已知碼字組解碼且判定解碼資料區 塊疋正確還是錯誤,因為已知該碼字組所以可完成上述操 作。解碼器262將每一已接收之已知碼字組的狀態提供至 字組,(2)若該已接收之已知碼字組為未抹除碼字組且經正 確解碼,則為"良好,,碼字組,或(3)若該已接收已知碼字組 為未抹除碼字組但經錯誤解碼,則為"不良"碼字組。 抹除臨限值調節單元264獲得已接收之已知碼字組之狀 態且調節抹除臨限值,如下: erasure⑺+ △ΤΗ#’對於良好碼字組, ,,對於不良碼字組;且 式 ⑺,對於已抹除碼字組, 其中THersure(l)為用於第三循環間隔】之抹除臨限值; △ THup為用於抹除臨限值之增大步進大小,·且
—抹除臨限值調節單元264,該碼字組可為:〇)已抹除碼 THerasure (£ +1) △ THdn為用於抹除臨限值之下行步進大小。 如式7中展示,對於每一已接收之已知碼字組(其為不良 碼字組),使抹除臨限值減小ATHdn。較低抹除臨限值㈣ 於較嚴格之_測標準且導致已接收碼字組更可能被認 為是已抹除的’當認為該已接收碼字組未抹除時其又導致 該已接收碼字组更可能被正確解碼。相反地,對於每一已 接收之已知碼字組(其為良好碼字組),使抹除臨限值增大 △ THUP。冑高抹除臨限值對應於—較不嚴格之抹㈣測標 準且導致已接收碼字組較不可能被認為是已抹除的,當認 102551.doc 19 1360976 為該已接收碼字組未抹除時其又導致該已接收碼字組更可 能被錯誤解碼。對於已抹除之已接收的已知碼字組,將抹 除臨限值維持於相同等級。 用於調節抹除臨限值的ATHup& ΛΤΗ<ίη步進大小基於以下 關係來設定:
Pr. error / 式(8) 舉例而言’若用於該控制通道之目標條件誤差率為 /〇則下步進大小為上行步進大小之99倍。可基於已 接收符號之預期量值、第三循環所要之收敛率及可能之其 它因素來判定△THup& △THdni量值。 通常,抹除臨限值之調節視如何定義用於抹除偵測的量 度而定。式⑺及⑻係基於如式⑺中所示而定義的量度。 亦可以其它方式(例心,而不是 m(k)=dnl(k)/dn2(k))定氣铱f 产,九 改對抹除臨限值之調節^二=情況下可相應地修 η即 了凋即之抹除臨限值亦可與任一 測技術結合❹’以達成對於各種通道條件的穩固 抹除偵測效能。 可以各種方式動態地調節抹除臨限值% 實施例中,基.地台為與基地 erasure 立之第三猶環。此實施例允心= '終端機維持-獨 除臨限值,然後並允呼為,二終端機個別地調節抹 谩”允泎為该終端機特殊 能。舉例而言,不同终 制疋控制通道效 其可藉由為此等終端機操作獨;;^目標條件誤差率’; -實施例中,基地台為與基地環而達成。在另 也口通仏之所有終端機維持單 10255J.doc -20· 1360976 一第三循環。然後將共同抹除臨限值用於對所有此等終端 機之抹除偵測,且亦基於基地台自此等終端機所接收之已 知碼字組而更新該共同抹除臨限值。若控制通道效能在各 種通道條件下對於此等終端機為穩固的,則此實施例向所 有終端機提供良好效能。此實施例允許第三循環之較快收 斂率,且因為每一終端機以較低速率(例如每幾百毫秒— 次)傳輸已知喝字組,所以亦減小了耗用。在又一實施例 中丄基地台為具有相同控制通道效能的每一組終端機維持 早-第三猶環’且基於基地台自該組中之所有終端機所接 收之已知碼字組而更新抹除臨限值。 通常以不同速率更新内循環21〇、外循環22〇及第三循環 23〇。内循環21〇為三個循環中最快之循環,且用於控制通 道=傳輸功率可以一特定速率(例如每秒15〇次)來更新。外 循衣220為下一最快之循環,且無論何時於控制通道上接 收到碼字組便可更新目標SNR。第三循環23〇為最慢之循 ^ ’且無論何時於控制通道上接收到已知碼字組便可更新 心《 了選擇5亥4二個循%之更新速率以達成抹除 偵測及功率控制所要之效能。 作述之實施例而言’目標條件誤差率^用 ’工制通道的效能之量測之一,且設計第三循環以達成 效能之其它量測亦可用於控制通道,且相應地 =三循環1例而言,當認為已抹除時,已接收碼字 、U解碼之目標機率可詩第三循環。 圖从及扣展示用於更新功率控制機製3〇〇之第二循環及 10255 丨.doc 1360976 第一循環的一過程300之一流程圖。最初自該控制通道而 獲得已接收碼字組k(步驟312)β例如如以上所描述,為已 接收馬子、,且计算里度讲«)(步驟314),且比較該量度與抹除 臨限值(步驟316)。若如步驟32〇中判定,已計算之量度 防㈨大於或等於抹除臨限值,且若如步驟322中判定,已 接收碼子組並非已知碼字組,則宣佈已接收碼字組為已抹 除碼字組(步驟324)。若已計算之量度,大於或等於抹除 臨限值,則不管已接收碼字組為已知還是未知的’都將目 UNR增大步進大小(步驟326)。在步驟似之後, 該過程返回至步驟312,以處理下—已接收碼字組。 若如步驟320中判定,ρ斗管 > 曰+ 已计异之ϊ度所队)小於抹除臨限 值,且若如步驟332中判定,已接收碼字組並非已知碼字 組’則宣佈已接收碼字相或土 # μ + 子、,且為未抹馀碼子組(步驟334),且將 目標驗減小細Rdn步進大小(步驟336)。該過程返回至 步驟312,以處理下一已接收碼字組。 若如步驟320中判定,已钟笪旦 算之里度w小於抹除臨限 值’且若如步驟332中判定,已接收碼字組為已知碼字 組,則(參看圖3B)將已接收碼字組解碼(步驟34〇)。若如步 驟342中判定,解碼正確,+ 雉則旦佈已接收之已知碼字組為 良好子組(步驟344),且將抹除臨限值增大綱叩步進大小 (步驟346广否則,若如步驟 乂娜M2中判定,存在解碼錯誤, 則宣佈已接收之已知碼字組為 為不良碼字组(步驟354),且將 抹除臨限值減小ATHdn#進大小 (^驟3 5.6)。該過程自步驟 346及356返回至圖从中之步驟^ 以處理下一已接收媽 I0255I.doc -22- 1360976 子組。 如上所述’本文所描述之技術可用於不使用誤差偵測編 碼之各種類型的實體通道。以下描述此等技術在一例示性 資料傳輸方案中的用途。對於此傳輸方案而言,需要正向 鏈路傳輸之終端機估算用於其伺服基地台的正向鏈路之已 接收訊號品質(例如基於該基地台所傳輸之前導訊號 (pilot))。可將已接收訊號品質估算轉化為L位元值,其被 稱為通道品質指示符(CQI)。CQI可指示用於正向鏈路之已 接收SNR、用於正向鏈路之所支持之資料速率,等等。在 任一情況下,對CQI執行區塊編碼以獲得CQI碼字組。作 為一特殊實例,L可等於4,且CQI碼字組可包含“個卩”尺 調變符號,或[Si(l) Si(2)….Si(i6)]。終端機於cqj通道(其 為控制通道之一)上將CQI碼字組傳輸至伺服基地台。伺服 基地台接收CQI通道上所發送之CQI碼字組且對已接收 碼字組執行抹除偵測。若已接收CQI碼字組未被抹除,則 伺服基地台將已接收CQI碼字組解碼且使用已解碼之 對該終端機之資料傳輸進行排程。 圖4展示用於例示性資料傳輸方案的一組資料通道及控 制通道。終端機量測正向鏈路之已接收訊號品質且於匸切 通f上傳輸CQI碼字組。終端機不斷地對正向鏈路品質做 出量測且於CQI通道上發送已更新之cqi碼字組。因此, :棄被認為已抹除之已接收CQI碼字組不會損害系統效 1。然而,認為未抹除之已接收CQI碼字組應具有較高品 質因為可基於包含於此等未抹除之CQI碼字组中的資訊 102551.doc •23 · 1360976 來對正向鏈路傳輸排程。 若該終端機被排程用於正向鏈路傳輸’則伺服基地台處 理貝料封包以獲得編碼封包且於正向鏈路資料通道上將編 馬封包傳輸至该終端機。對於混合自動重傳(H_ARQ)方案 而言,將每一編碼封包分為多個子區塊,且每一次傳輸— 子區塊而用於編碼封包。由於在正向鍵路資料通道上接收 用於-特定編碼封包的每一子區塊,因此該終端機試圖基 於到此為止所接收到之用於該封包之所有子區塊而解碼並 恢復該封包。因為子區塊包含當已接收訊號品質不良時有 助於解碼但當已接收訊號品質良好時不需要的冗餘資訊, 所以該終端機能夠基於-部分傳輸而恢復該封包。若將封 包正確解碼,則終端機於ACK通道上傳輸確認(AM),否 則傳輸否定確認(ΝΑ”。正向鏈路傳輸繼續以此方式進 行直至將所有編碼封包傳輸至終端機為止。 本文所描述之技術可有利地用於CQI通道。如上所述, 可對每一已接收CQl碼字組執行抹除價測。可使用功率护 制機製300來調節用於⑽通道之傳輸功率,以達 道所要之效能(例如所要之抹除率及所要之條件誤差率)。 亦可基於用於CQI通道之功率控制傳輸功率來設定用於其 它控制通道(例如ACK通道)及反向鏈路眘 ^ 叇峪貝枓通道之傳輸功 半 〇 為清晰起見’已具體描述用於反向鏈 鍵路之抹除偵測及功 率控制技術》此等技術亦可用於正向鉍 l 门鏈路上所發送之傳輸 的抹除偵測及功率控制。 <02551^0, -24- 1360976 圖5展示一基地台11 〇x及一終端機12〇乂之一實施例的一 方塊圖。在反向鏈路上,於終端機12(^處,一傳輸(τχ)資 料處理器5 10接收並處理(例如格式化、编碼、交錯,及調 變)反向鏈路(RL)訊務資料且為訊務資料提供調變符號。 ΤΧ貧料處理器510亦處理來自一控制器52〇之控制資料(例 如CQI)且為控制資料提供調變符號。一調變器(M〇D)512 處理用於訊務資料及控制資料之調變符號及前導符號,並 k供一序列之複值碼片(c〇mplex valued chip)。由τχ資料 處理5 10及調變器5U執行之處理視系統而定。舉例而 言,若系統使用OFDM,則調變器512執行〇FDM調變。一 傳輸器單元(TMTR)5 14調節(例如,變換至類比、放大、濾 波,及增頻變換)該序列之碼片,並產生一反向鏈路訊 號,該訊號經由一雙工器(D)516而投送且經由一天線518 ‘傳輸。 在基地σ 1 10x處,來自終端機12〇χ之反向鏈路訊號由一 天線552接收、經由一雙工器554而投送且被提供至一接收 器單元(rcvr)556。接收器單元556調節(例如,滤波、放 大及降頻變換)已#收訊號且m吏已調節訊號數位 化,以獲得一資料樣本流。一解調變器(dem〇d)558處理 資料樣本謂得符號估算H接收㈣資料處理器 處理(例如解交錯及解碼)符號估算以獲得用於终端機 12〇X之解碼資料。RX資料處理器560亦執行抹除偵測且將 用於力率控制的每一已接收碼字組之狀態提供至一控制器 570。由解調變器558及以資料處理器56q所執行之處理; 10255i.doc •25· ^60976 別補充由調變器5 12及TX資料處理器5丨〇所執行之處理。 可以類似於以上所描述之對於反向鏈路傳輸之處理的方 式執行對於正向鏈路傳輸之處理。一般由系統指定對於反 向鏈路傳輸及正向鏈路傳輸之處理。 對於反向鏈路功率控制而言,一 SNR估算器574估算用 於终端機120χ之已接收SNR且將已接收SNR提供至一 Tpc 產生器576。TPC產生器576亦接收目標SNR且產生用於終 _ 端機l2〇x之TPC指令。TPC指令由一 TX資料處理器582處 理、由一調變器584進一步處理、由一傳輸器單元586調 即、經由雙工器554而投送,且經由天線552而傳輸至終端 機120x 〇 在終端機120χ處,來自基地台11〇χ之正向鏈路訊號由天 線518接收、經由雙工器516而投送、由一接收器單元54〇 調節並加以數位化、由一解調變器542處理,且由一 rX資 料處理器544進—步處理,以獲得已接收之Tpc指令。然 鲁後一 TPC處理器524偵測已接收TPC指令以獲得用於產生傳 輸功率調節控制的TPC決策。調變器512自TPC處理器524 接收控制且調節用於反向鏈路傳輸之傳輸功率。以一類似 方式可違成正向鏈路功率控制。 控制器520及570分別指導終端機12(^及基地台11(^内之 各種處理單元之操作。控制器52〇及57〇亦執行用於對於正 向鏈路及反向鏈路之抹除偵測及功率控制的各種功能。舉 例而s ’每一控制器可實施用於其鏈路的SNR估算器、 TPC產生器及目標SNR調節單元。控制器57〇及資料處 102551.doc •26· 1360976 理器560亦可實施圖3八及邛中之過程3〇〇。記憶體單元η? 及572分別儲存用於控制器52〇及57〇之資料及程式碼。 可由各種方法來貫施本文描述之抹除偵測及功率控制技 術。舉例而言’可在硬體、軟體或其一組合中實施此等技 術。對於硬體實施例而言,用於執行抹除㈣及/或功率 控制之處理單7L可實施於一或多個特殊應用積體電路 (ASIC)、數位訊號處理器(Dsp) '數位訊號處理設備 (DSPD)、可程式化邏輯設備(pLD)、現場可程式化間極陣 列(FPGA)、處理器、控制器、微控制器、微處理器、經設 計以執行本文所描述之功能的其它電子單元或其一組合 内。 *對於軟體實施例而言,可❹執行本文所描述之功能的 模,且(例如私序、功能,等等)來實施本文所描述之技術。 軟體各式碼可儲存於記憶體單元(例如圖5中之記憶體單元 572)中且由一處理器(例如控制器57〇)來執行。記憶體單元 可㈣於處理器内或處理器外部,在該種情況下,其可經 由先前技術中已知 。。 打…之各種方法以可通信方式耦接至處理 姦〇 者=!!示實施例之先前描述以賦能任-熟習此項技術 抑此項技1使用本發明°對此等實施例之各種修正對於熟 二=者而言將顯而易見’且本文所定義之一般原理 :應:於其它實施例而不會脫離本發明之精神及範略。因 本 斤展不之貫施例,而是將符合與 所揭不之原理及新㈣徵—致的最廣泛範嘴。 102551.doc -27. 1360976 【圖式簡單說明】 圖1展示一無線多向近接通信系統; 圖2展示一具有三個循環之功率控制機製; 圖3 A及3B展示一用於更新圖2中所展示之功率控制機製 的第二及第三循環的過程; 圖4展示用於一資料傳輸方案的資料通道及控制通道;且 圖5展示一基地台及一終端機之方塊圖。 【主要元件符號說明】
100 無線多向近接通信系統 110, 110x 基地台 120, 120x 無線終端機 130 系統控制器 200 功率控制機製 210 内循環 220 外循環 230 第三循環 240 反向鍵路 242 SNR估算器 244 傳輸功率控制發生器 252 量度計算單元 254 抹除偵測器 256 目標SNR調節單元 260 正向鏈路 262 TPC處理器/解碼器 10255I.doc • 28 · 1360976
264 傳輸功率調節單元/抹除臨限值調節單元 300 功率控制機製/過程 510 傳輸資料處理器 512 調變器 514 傳輸器單元 516 雙工器 518 天線 520 控制器 522 記憶體單元 524 TPC處理器 540 接收器單元 542 解調變器 544 RX資料處理器 552 天線 554 雙工器 556 接收器單元 558 解調變器 560 RX資料處理器 570 控制器 572 記憶體單元 574 SNR估算器 576 TPC產生器 582 TX資料處理器 584 調變器 586 傳輸器單元 102551.doc -29-
Claims (1)
- 、申請專利範圍: -種在-通信系統中執行抹除偵測的方法,其包含: 獲得用於匕由-無線通道所傳輸之碼字組的已接收巧 字組ϋ傳輸碼字組為—區塊之已編碼或未編碼資 料且每一已接收碼字組為—已傳輸碼字組之-有雜訊 的版本; ° 為母一該等已接收碼字組計算一量度; 比較用於每-已接收碼字組之該已計算之量度與 除臨限值; Μ + 基於對每-已接收碼字組之—比較結果而宣佈該每— 已接收碼字組為-已抹除碼字組或—未抹除碼字組;及 動態地調節該抹除臨限值以達成用於抹除偵測的一目 標效能等級。 2.如請求項1之方法,其進一步包含: 獲知用於經由該無線通道所傳輸之已知 收之已知碼字組,每-已知碼字組為-區塊之 料,且每一已接收之已知碼字組為一已傳輸之已知碼二 組之—有雜訊的版本; 為一良 良好石馬 將每一該等已接收之已知碼字組之一狀態判定 好碼字組、一不良碼字組或一已抹除碼字組,— 字組係被宣佈為一未抹除碼字組且經正確解一 已接 收之已知碼字組,且一不良碼字組係被宣佈為—未抹除 碼字組但經錯誤解碼的一已接收之已知碼字組;及 基於每一已接收之已知碼字組之該狀態而調節該抹除 10255 丨,doc 臨限值。 如"月求項2之方法’其中該等已知碼字組由—或多個傳 輸實體以已知次數來傳輸。 4·如。月求項2之方法,其中當受到指導時,.該等已知碼字 組由一傳輸實體來傳輸。 5. 如請求jg〗夕士 方法,其中一未抹除碼字組與經正確接收 的特疋可信度等級相關,且一已抹除碼字組與經錯誤 接收的一特定可信度等級_。 、 6. 如請求 Ji 1 $ , 峭艾方法’其中用於抹除偵測的該目標效能等 =為-目標條件誤差率,其可指示若—已接收碼字組被 —佈為未抹除碼字組則其被錯誤解碼之一預定機率。 7. =請求項1之彳法,#中每一已傳輸碼字組為複數個可 月匕之有效碼字组之―,且其中該量度係基於可指示一已 接收碼字組之可靠性的一函數。 8_如請求項7之方法,其中用於每一已接收碼字組之該量 至最近之有效碼字組之一Euclidean(歐幾裏德) 距離對至一下一啬 一 蚨近之有效碼子組之一 Euclidean距離的 一=率’至該最近之有效碼字組之該Euelidean距離為該 已接收碼字組與最接近於該已接收碼字組的一有效碼字 組之間的該Euclidean距離,且至該下—最近之有效碼字 組之該—lidean距離為該已接收碼字組與下—最接近於 :已接收碼字耝的-有效碼字組之間的該距 離0 9.如請求項〗之方法,其中每一已 傳輪碼字組為藉由 對 10255I.doc =之未編碼資料執行區塊 貧料》 々獲付的一區塊之編碼 10.如請求項][之方 差谓測石馬。 /、母一已傳輪碼字組不包括—誤 置,呆在—無線通信系統中執行抹除伯測的裝 道的其可操作,得用於經由-無線通 碼字組計㈣字心騎—料已接收 ^ 1度’其中每-已傳輸碼 已編碼或去铯次,, * ^ 一塊之 ^ -飞禾編碼資料,且其中 傳輸碼字组之-有雜訊的版本;接收碼子組為-已 所二其可操作以比較為每-已接收碼字組 斤十算之該量度與—抹除臨限值並基於對該已接收 ,·且的—比較結果而宣佈每一已接 字組或-未抹除碼字組;及碼于組為-6一 “-調節單元’其可操作以動態地調節該抹除臨限值, 從而達成用於抹除偵測的—目標效能等級。 12.如請求項丨丨之裝置,其進一步包含: 一解碼器,其可操作以 獲得用於經由該無線通道所傳輸之已知碼字組的已 接收之已知碼字組,每一已知碼字組為一區塊之—已 知資料’且每一已接收之已知碼字奴為一已傳輸之已 知碼字組之一有雜訊的版本, 將被認為是一未抹除碼字組的每—已接收之已知碼 102551.doc 字組解碼,及 將每-已接收之已知碼字組的一狀態判定為 碼子組、-不良碼字組或—已抹除碼字組,一 字組係被宣佈為一未抹降 木採除碼子組且經正確解碼的—已 接收之已知碼字植,日 -r- A _ 子組且一不良碼字組係被宣佈為—未 抹除碼社但經錯誤解碼的_已接收之已知碼字組 其中該調節單元可操作以基 土 、母匕接收之已知碼丰 ,,-且之該狀態而調節該抹除臨限值。 η :種:I”以在一無線通信系統中執行抹除偵測的裝 置’其包含: 衣 2獲付用於經由一無線通道所傳輸之碼字組的已接 碼字組的構件,每一已傳輸 或未編碼資料,且每—已接 ^ 編碼 之古^ 子組為一已傳輸碼字組 之一有雜訊的版本; 用於為每一該等已接收碼字組計算—量度的構件; ^於比較為每-已接收碼字組所計算之該量度與一抹 除臨限值的構件.; ^ 用於基於對每_已接收碼字組 已桩此级—,A 比季乂、,,°果而宣佈該 件;及 飞未抹除碼字組的構 用於動涵地調節該抹除臨限伯U、去丄、扣 末除L限值以達成用於抹除偵測的 目軚效能等級的構件。 14.如請求項13之裝置,其進一步包含: 用於獲得用於經由該無線通道所傳輪之已知瑪字組的 102551.doc -4- 1360976 已接收之已知碼字組的構件,每一已知碼字組為—區塊 之一已知資料,且每一已接收之已知碼字組為一已傳輸 之已知碼字組之一有雜訊的版本; 用於將每一該等已接收之已知碼字組之一狀態判定為 一良好碼字組 '一不良碼字組或一已抹除碼字組的構 件,一良妤碼字組係被宣佈為一未抹除碼字組且經正確 解碼的-已接收之已知碼字組,且—不良碼字組係被宣 佈為一未抹除碼字組但經錯誤解碼的一已接收之已知碼 字組;及 用於基於每一已接收之已知碼字組之該狀態而調節該 抹除臨限值的構件。 15· 一種在一無線通信系統中對經由一無線通道所發送之一 傳輸執行功率控制的方法,其包含: 獲得用於該傳輸中所傳輸之碼字組的已接收碼字组, 母-已傳㈣字組為—區塊之已編媽或未編碼資料,且 =一已接收碼字組為—已傳輸碼字組之-有雜訊的版 —抹除臨限 已抹除碼字 基於為該已接收碼字組所計算之—量声 值而將每-已接收碼字組的一狀態判定為 組或一未抹除碼字組; 一目標訊號品 於該傳輸之傳 基於每-已接收石馬字組之該狀態而調節 質(SNR),其中基於該目標謝而調節用 輸功率; 已知碼字組的已接 獲得用於經由該無線通道所傳輸之 102551.doc Μ 1360976 收之已知碼字组’每―已知碼字組為-區塊之-已知資 料,且每-已接收之已知碼字組為一已傳輸之已知碼字 組之一有雜訊的版本; 一將每—已接收之已知碼字組的—狀態判定為一良好碼 子组、-不良碼字組或—已抹除碼字組,—良好碼字組 係被認為是-未抹除碼字組且經正確解碼的—已接收之 已知碼字組,且—不良碼字組為絲認為是-未抹除碼字組但經錯誤解碼的—已接收之已知碼字組;及 基於母-已接收之已知碼字組之該狀態而調節該抹除 臨限值。 16,如請求項15之方法,其中該調節該目標snr之步驟包括 對於被經認為是一未抹除碼字組的每一已接收碼字 組’將該目標SNR減小一下行步進(d〇wn “邛),及 對於被認為是-已抹除碼字組的每一已接收碼字电, 將該目標SNR增大^上行步進(upstep)。 17·如請求項16之方法,其中用於調節該目標SNR的該下行 步進及該上行步進由—目標抹除率來判定,該目標抹除 率可指示宣佈一已接收碼字組為一已抹除碼字組之—預 定機率。 18.如 '求項15之方法,其中一較低抹除臨限值對應於一已 接收碼字組被認為是—已抹除碼字組的—較高機率,且 其中該調節該抹除臨限值之步驟包括 對於被認為是-不良碼字組的每一已接收之已知竭字 組,將該抹除臨限值減小一下行步進,及 10255I.doc 對於被認為是-良好碼字組的每一已接收之已知碼字 組,將該抹除臨限值增大一上行步進。 19.如請求項!8之方法’其中該調節該抹除臨限值之步驟進 一步包括 一對於被認為是一已抹除碼字組的每一已接收之已知碼 子組,將該抹除臨限值維持於相同等級。 2〇.如請求項18之方法’其中用於調節該抹除臨限值之兮下 行步進及該上行步進由一目標條件誤差率來判定,該目 標條件誤差率可指已接收之碼字組被宣佈為—未 抹除碼字組則其經錯誤解碼之一預定機率。 θ求項1 5之方法’其中該等已接收之已知碼字組係自 複數個不同傳輸實體而獲得。 22·如請求項15之方法,其進一步包含: 估算用於該傳輸之一已接收SNR; 比較該已接收SNR與該目標SNR;及 基於該比較之έ士罢&太丄x μ 。果而產生指令,其中該等指令用於調 郎用於該傳輸之該傳輸功率。 23. -種可操作以在_無線通信系統中對經由—無線通道所 發运之一傳輸執行功率控制的裝置,其包含: 一資料處理器,其可操作以 獲得用於該傳輸中所傳輸之碼字組的已接收碼字 :組’每-已傳輸碼字組為一區塊之已編碼或未_資 料 4已接收碼字組為-已傳輸碼字Μ之一有雜 訊的版本, 力雜 102551.doc 1360976 基於為該已接收碣字組所計算之—量度及 限值而將每一已接收碼字組的一狀態判 碼字組或-未㈣碼字組, 抹 獲得用於經由該無線通道所傳輸之已知喝字組的已 接收之已知碼字組,每一已知碼字組為一區塊之一已 知資料,且每一已接收之已知碼字組為一已傳輸之已 知碼字組之一有雜訊的版本,及:每-已接收之已知碼字組的—狀態判定為一良好 :子組、一不良碼字組或-已抹除碼字組,-良好碼 字組係被認為是—未抹除碼字組且經正確解的-已 接收之已知碼字組’且一不良碼字組係被認為是一未 抹除碼字組但經錯誤經派μ „ 戎解碼的一已接收之已知碼车 組;及 卞 控制器’其可操作以 已接收碼字組之該狀態而調節一目標訊號基於每一 品質(SNR), 之傳輸功率 其中基於該目標SNR而調節用於該傳輸 ,且 ’ 基於每一 除臨限值。 已接收之已知碼字組之該狀態而調節該抹 24.如請求項23之裝置,其進—步包含: 一隨估算器,其可操作以估算用於該傳輸之 收SNR ;及 C ^ 產生器#可操作以比較該已接收SNR與該目才》 SNR並產生用於調節 曰知 ;DX傳輸之該傳輸功率的指令。 I02551.doc 25.如請求項23之裝 A 臨限值來遠志,、中这控制益可操作以調節該抹除 #亍从 目標條件誤差率,言亥目標條件誤差率可 二右已接收之碼字組被宣佈為一未抹 經錯誤解碼之—預定機率。 子,續其 26.如請求項23之裝 SNRm_ ^操作以調節該目標 達成目標抹除率,該目標抹除~p _ P 知徠除千可指示宣佈一 ’H為-已抹除碼字組之—職機率。 7·如請求初之裝置,其中該傳輸係用於—控制通道。 =請求項27之裝置,其中該控制通道心發送通道品質 #訊且其中母一已傳輪碼字组係用於一通道品質指示 付。 已知碼字組係自複 29.如請求項23之裝置,其中該已接收之 數個不同傳輸實體而獲得。 3〇.如請求項23之裝置,且其用於一基地台中。 如明求項23之裝置’且其用於—無線終端機中。 32. -種可㈣以在-無料㈣統巾對經由—無線通道所 發送之一傳輸執行功率控制的裝置,其包含: 用於獲得用於該傳輸中所傳輸之碼字組的已接收碼字 組的構件,每—已傳輸碼字組為-區塊之已編碼或未編 碼資料’且其中每-已接收碼字組為—已傳輸碼字組之 一有雜訊的版本; 用於基於為該已接收碼字纽所計算之—量度及一抹除 臨限值而將每·已接收碼字組之_狀態判定為一已抹除 碼字組或一未抹除碼字組的構件; I02551.doc -9- 1360976 而調節一目標訊 之傳輸功率基於 用於基於每一已接收碼字組之該狀態 號品質(SNR)的構件,其中用於該傳輪 該目標SNR加以調節; 用於獲得用於經由該無線通道所傳輸之已知碼字組的 已接收之已知碼字組的構件’每一已知碼字組為一區塊 之-已知資料’且每—已接收之已知碼字組為一已傳輸 之已知碼字組之一有雜訊的版本; 用=將每一已接枚之已知碼字組之—狀態判定為一良 好碼字組、-不良碼字組或—已抹除碼字組的,— 良好碼字㈣被認為p未抹除碼字組且經正確解碼的 一已接收之已知碼字爸且,日__ 丁 & ^ ,、、且不良碼予組係被認為是— 未抹除碼字組但經錯誤解碼的—已接收之已知碼字組;及 用於基於母-已接收之已知碼字組之該狀態而調節兮 抹除臨限值的構件。 ^ 33·如請求項32之裝置,其進一步包含: 用於估算用於該傳輸之一已接收SNR的構件; 用於比較該已接收SNR與該目標SNR的構件;及 用於基於該比較之結果而產生指令的構件,其中該等 指令用於調節用於該傳輸之該傳輸功率。 10255I.doc • J0-
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| CN1969473B (zh) * | 2004-06-14 | 2011-02-09 | 三星电子株式会社 | 多输入多输出移动通信系统中控制传输模式的装置和方法 |
| US7197692B2 (en) | 2004-06-18 | 2007-03-27 | Qualcomm Incorporated | Robust erasure detection and erasure-rate-based closed loop power control |
| US7724777B2 (en) | 2004-06-18 | 2010-05-25 | Qualcomm Incorporated | Quasi-orthogonal multiplexing for a multi-carrier communication system |
| US7594151B2 (en) | 2004-06-18 | 2009-09-22 | Qualcomm, Incorporated | Reverse link power control in an orthogonal system |
| US8452316B2 (en) * | 2004-06-18 | 2013-05-28 | Qualcomm Incorporated | Power control for a wireless communication system utilizing orthogonal multiplexing |
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- 2004-07-13 US US10/890,717 patent/US7197692B2/en not_active Expired - Lifetime
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2005
- 2005-06-07 JP JP2007516550A patent/JP4575442B2/ja not_active Expired - Lifetime
- 2005-06-07 AU AU2005262561A patent/AU2005262561C1/en not_active Ceased
- 2005-06-07 RU RU2007101708/09A patent/RU2348115C2/ru active
- 2005-06-07 NZ NZ552149A patent/NZ552149A/en not_active IP Right Cessation
- 2005-06-07 EP EP05758666.1A patent/EP1766829B1/en not_active Expired - Lifetime
- 2005-06-07 WO PCT/US2005/020087 patent/WO2006007317A1/en not_active Ceased
- 2005-06-07 ES ES05758666.1T patent/ES2642587T3/es not_active Expired - Lifetime
- 2005-06-07 BR BRPI0512201-5A patent/BRPI0512201B1/pt active IP Right Grant
- 2005-06-07 CA CA2570343A patent/CA2570343C/en not_active Expired - Fee Related
- 2005-06-07 HU HUE05758666A patent/HUE035959T2/en unknown
- 2005-06-07 CN CN2005800279019A patent/CN101006672B/zh not_active Expired - Lifetime
- 2005-06-16 TW TW094120047A patent/TWI360976B/zh not_active IP Right Cessation
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101006672A (zh) | 2007-07-25 |
| TW200614724A (en) | 2006-05-01 |
| NO20070270L (no) | 2007-01-16 |
| BRPI0512201B1 (pt) | 2019-02-19 |
| US20110296279A1 (en) | 2011-12-01 |
| RU2007101708A (ru) | 2008-07-27 |
| US7197692B2 (en) | 2007-03-27 |
| EP1766829A1 (en) | 2007-03-28 |
| BRPI0512201A (pt) | 2008-02-19 |
| US20070150799A1 (en) | 2007-06-28 |
| AU2005262561C1 (en) | 2010-04-29 |
| HK1104725A1 (zh) | 2008-01-18 |
| NZ552149A (en) | 2008-09-26 |
| WO2006007317A1 (en) | 2006-01-19 |
| AR049926A1 (es) | 2006-09-13 |
| CA2570343C (en) | 2012-01-31 |
| CN101006672B (zh) | 2011-02-23 |
| AU2005262561A1 (en) | 2006-01-19 |
| HUE035959T2 (en) | 2018-05-28 |
| EP1766829B1 (en) | 2017-07-19 |
| JP2008503924A (ja) | 2008-02-07 |
| IL180120A0 (en) | 2007-06-03 |
| US20050283715A1 (en) | 2005-12-22 |
| RU2348115C2 (ru) | 2009-02-27 |
| AU2005262561B2 (en) | 2009-07-23 |
| US8516314B2 (en) | 2013-08-20 |
| CA2570343A1 (en) | 2006-01-19 |
| IL180120A (en) | 2011-01-31 |
| JP4575442B2 (ja) | 2010-11-04 |
| ES2642587T3 (es) | 2017-11-16 |
| NO343267B1 (no) | 2019-01-14 |
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