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 PDF

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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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sir
threshold
communication
patent application
ack
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TW092127600A
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TWI325241B (en
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Stephen G Dick
Young-Lok Kim
Nader Bolourchi
Sung-Hyuk Shin
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Interdigital Tech Corp
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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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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

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  • 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)

  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 -
TW092127600A 2002-02-19 2003-02-19 Method and apparatus for avoiding an erroneous determination of an acknowledge (ack) of a communication containing an error TWI325241B (en)

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TWI325241B TWI325241B (en) 2010-05-21

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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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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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