TW200423574A - Method and apparatus for providing biasing criteria for binary decisions for use in wireless communications to enhance protection - Google Patents
Method and apparatus for providing biasing criteria for binary decisions for use in wireless communications to enhance protection Download PDFInfo
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- TW200423574A TW200423574A TW092127600A TW92127600A TW200423574A TW 200423574 A TW200423574 A TW 200423574A TW 092127600 A TW092127600 A TW 092127600A TW 92127600 A TW92127600 A TW 92127600A TW 200423574 A TW200423574 A TW 200423574A
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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
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
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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
- H04L1/12—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
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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
- H04L1/12—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
- H04L1/1803—Stop-and-wait protocols
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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
- H04L1/12—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
- H04L1/1829—Arrangements specially adapted for 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
- 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
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1854—Scheduling and prioritising arrangements
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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
- H04L5/0055—Physical resource allocation for ACK/NACK
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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
- H04L5/0058—Allocation criteria
- H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
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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
- H04W28/04—Error control
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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
- H04L2001/0098—Unequal error protection
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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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L2001/125—Arrangements for preventing errors in the return channel
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Description
200423574 0) 玖、發明說明 (發明說明應敘明:發明所屬之技術領域、先前技術、內容、實施方式及圖式簡單說明) 技術領域 本發明係關於無線通信。具體而言,本發明係關於爲高 速下行鏈路封包(HSDP)提供已偏壓的二進位決定。 先前技術 在HSDP HSDPA以及許多其他的通信系統中,有的應用需 要二進位元決定,但其中錯誤的懲罰在二決定之間是不等 的。 例如,HSDPA使用一 ACK/NACK信號,其中使用者設備(user equipment ; UE)可指示所發送的一資料區塊是否已成功解 碼。已發現:將NACK訊息錯誤地解釋爲ACK較將ACK訊息 錯誤地解碼爲NACK對系統效能損害更大。在後一種情形 下,錯誤將導致所發送的區塊進行不必要地重新發送,這 只不過相當於效率的較小損失。在前一種情形下,發送器 將假定先前所發送的區塊已成功發送,不再進行重新發送。 此種災難性故障會引起嚴重的系統崩潰。 已發現數種明顯的技術可施加偏壓於應答,以便識別 NACK之條件。例如,在二進位相移鍵控(binary phase shift keying ; BPSK)之正常固有的解調變中,輸出信號通常加以 標準化,如代表1的理想信號爲+1.0,而代表〇的理想信號則 爲-1.0,且在具有損失、干擾和雜訊的典型通道中,標準化 輸出可能採用兩者之間的任何値。 在未施加偏壓的決定中,若一輸出z>0,則該程序便宣告 1 ;若該輸出z<〇,則該程序便宣告該輸出=0。在施加偏壓 200423574 (2) 髮劈設明_頁’ 的決定中,若該輸出ζ>Χ,則宣告1,否則宣告〇。χ視爲臨 界値,並根據分析來選擇。若希望輸出爲1,則X將爲負, 例如一較小的負數,如-0.1等。 使用上述程序來使輸出標準化,並得出最佳臨界値,實 施起來是棘手且複雜的,且實施中的公差會引起降級。 發明內容 根據本發明,可利用一標準以使該決定在應用中簡單且 可靠甚多,該標準明顯比簡單的X臨界値更加可靠。 根據此標準,對於時間劃分雙工(TDD)而言,該標準係以 所測量的信號干擾比(SIR)爲基礎,該信號干擾比係源自通 道估測程序。可見實際上所有的錯誤實例都發生在SIR値較 低時。 無線電調變(RM)解碼器的故障或近似故障與傳輸中其他 位元錯誤之間的相關性較高;因此,本發明之標準具有高 度可靠性,且易於實施。 實施方式 圖1之常式係用以實施本發明之技術。在圖中所示的下行 鏈路範例中,諸如基地台(BS10)之類的裝置以來自UE12的通 信(步驟S1)爲基礎,利用此通信獲得通道估測値(步驟S2)。 在步驟S3處,BS10使用廣爲人知的技術自該通道估測値 得出一信號干擾比(SIR)。在步驟S4處,BS10將在步驟S3處 所獲得的SIR與一既定的臨界値比較。 該臨界値可藉由採用多種不同技術之一予以決定。一種 可能使用的技術爲:藉由借助類比之分析及使用測試裝置 200423574 (3) __酵 之實際測試的結合來決定。測試信號及雜訊係輸入至測試 « 裝置,並檢查輸出信號。測量輸出信號,並決定二進位決 定的正確性。對整個範圍的有用信號(包括極低信號)重複進 行測試。對於每個振幅位準,均儲存正確決定和不正確決 定的實例數目。一般而言,強信號與正確決定的極高頻率 有關,而弱信號則與不正確信號的高賓例有關。該臨界値 最好係大於單獨雜訊的位準。 因爲目的是避免特定類型的錯誤,如發送NACK時,宣告 -ACK的可能性,故選擇(即施加偏壓於)該臨界値,從而當信 號局於該臨界値時’有可接受之較低頻率的錯誤:發生,而 當信號低於該臨界値時,有不可接受之頻率的錯誤發生。 因爲目的是避免ACK的虛假宣告,故與低於該臨界値之信 號一起發生的任何決定均宣告爲NACK。具體而言,當信號 低於該臨界値時,二進位決定係施加偏壓,使最低災難性 結果減至最低(即使在錯誤中)。此技術如步驟S11所示,可 能由BS10(或UE12)來離線或周期性實施。同樣地,必要時可 使用其他技術來獲得一臨界値。 若SIR小於該臨界値,則在步驟S5處,BS10將一 NACK信號 發送至UE12。在步驟S6處,UE12接收並偵測該NACK信號, 且在步驟S7處重新發送暫時儲存的通信,其係在步驟S8處 由BS10所接收。 返回步驟S4,假定SIR大於該臨界値,該常式分支到步驟 S9,以發送一 ACK信號。在步驟S10處,UE12接收ACK信號, 並清除步驟S1所暫時儲存的通信。 200423574 (4) 發明鏡明續頁\ V / :獅:雜義:殽;麵纖驢弦;:;感猶蘧& :浞法 應瞭解,圖1所示的常式可等效地應用於上行鏈路,其中 % BS10及UE12所執行的功能反向,且在步驟S1發送及暫時儲 存通信的是BS10。UE12在步驟S2處獲得通道估測値,在步 驟S3處獲得SIR,在步驟S4將所衍生的SIR與一既定的臨界値 比較,且在步驟S5將NACK發送至BS。BS10分別在步驟S6及 S7處接收NACK並發送所暫時儲存的通信,重新發送的通信 在步驟S8處由UE12接收。若SIR係大於該臨界値,則UE在步 驟S9發送一 ACK條件(其在步驟S10由BS10接收),從而該ACK 信號使該BS10清除所暫時儲存的通信。 應瞭解,本發明之技術亦可同時用於使用者設備與基:地 台之間的上行鏈路及下行鏈路通信。 圖式簡單說明 圖1係槪略性說明實施本發明之新穎方法的裝置。 圖式代表符號說明 BS10 基地台 UE12 使用者設備
Claims (1)
- 200423574 ,屢圍ΪΚ 拾、申請專利範圍 1 · 一種用以在含有一錯誤之一通訊中避免一確認(ACK ) 之一錯誤判定之方法,該方法包括如下步驟: 接收該通訊; 在該通訊上測量一訊號干擾比(SIR); 比較該量測的SIR及一SIR臨界値;以及 若該量測的SIR低於該SIR臨界値,則傳輸一NACK訊 號。 2·如申請專利範圍第1項之方法,其中該SIR臨界値係定期 更新。 3.如申請專利範圍第1項之方法,其中該SIR臨界値係設定 至一 ACK之一錯誤判定之頻率低到不會不利地影響整個 通訊系統效能之層級。 4 ·如申請專利範圍第^頁之方法,其中進一步包含於該通訊 中執行一錯誤的確認。 5 ·如申請專利範圍第4之方法,其中該比較係在該錯誤確認 之前執行。 6·~種用以在含有一錯誤之一通訊中避免一確認(ACK) 之一錯誤判定之裝置,該裝置包括: 一接收器,用以接收該通訊; 用以量測該通訊之一訊號干擾比(SIR)之構件; 一比較器,用以比較該量測的SIR及一 SIR臨界値;以 及 一傳輸器,用已於該量測的SIR低於該SIR臨界値時, 200423574 ___續頁纟 傳輸一 NACK訊號。 ^ 7. 如申請專利範圍第6項之裝置,其中該SIR臨界値係設定 至一 ACK之一判定較一非確認(NACK )之一判定更難之 層級。 8. 如申請專利範圍第7項之方法,其中該SIR臨界値係定期 更新。 9. 如申請專利範圍第7項之方法,其中該SIR臨界値係設定 至一 ACK之一錯誤判定之頻率低到不會不利地影響整個 通訊系統效能之層級。 -11 -
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US35794702P | 2002-02-19 | 2002-02-19 |
Publications (2)
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TW200423574A true TW200423574A (en) | 2004-11-01 |
TWI325241B TWI325241B (en) | 2010-05-21 |
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Family Applications (6)
Application Number | Title | Priority Date | Filing Date |
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TW092202592U TW586716U (en) | 2002-02-19 | 2003-02-19 | Apparatus for providing biasing criteria for binary decisions employed by a user equipment (UE) in wireless communications to enhance protection |
TW092103408A TWI246839B (en) | 2002-02-19 | 2003-02-19 | Method and apparatus for providing biasing criteria for binary decisions for use in wireless communications to enhance protection |
TW095105678A TWI350081B (en) | 2002-02-19 | 2003-02-19 | Method and apparatus for providing biasing criteria for binary decisions for use in wireless communications to enhance protection |
TW098121464A TW200943812A (en) | 2002-02-19 | 2003-02-19 | Method and apparatus for providing biasing criteria for binary decisions for use in wireless communications to enhance protection |
TW092127600A TWI325241B (en) | 2002-02-19 | 2003-02-19 | Method and apparatus for avoiding an erroneous determination of an acknowledge (ack) of a communication containing an error |
TW092202591U TW585379U (en) | 2002-02-19 | 2003-02-19 | Apparatus for providing biasing criteria for binary decisions employed by a base station (BS) in wireless communications to enhance protection |
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TW092202592U TW586716U (en) | 2002-02-19 | 2003-02-19 | Apparatus for providing biasing criteria for binary decisions employed by a user equipment (UE) in wireless communications to enhance protection |
TW092103408A TWI246839B (en) | 2002-02-19 | 2003-02-19 | Method and apparatus for providing biasing criteria for binary decisions for use in wireless communications to enhance protection |
TW095105678A TWI350081B (en) | 2002-02-19 | 2003-02-19 | Method and apparatus for providing biasing criteria for binary decisions for use in wireless communications to enhance protection |
TW098121464A TW200943812A (en) | 2002-02-19 | 2003-02-19 | Method and apparatus for providing biasing criteria for binary decisions for use in wireless communications to enhance protection |
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TW092202591U TW585379U (en) | 2002-02-19 | 2003-02-19 | Apparatus for providing biasing criteria for binary decisions employed by a base station (BS) in wireless communications to enhance protection |
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US (3) | US7428425B2 (zh) |
EP (1) | EP1476964A4 (zh) |
KR (8) | KR200329899Y1 (zh) |
CN (2) | CN2731876Y (zh) |
AR (1) | AR038569A1 (zh) |
AU (1) | AU2003217588A1 (zh) |
DE (2) | DE20302714U1 (zh) |
HK (2) | HK1053587A2 (zh) |
MY (1) | MY154973A (zh) |
TW (6) | TW586716U (zh) |
WO (1) | WO2003071717A1 (zh) |
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