TWI410076B - 無線通訊系統中之混合式自動重傳請求回饋通道索引方案 - Google Patents

無線通訊系統中之混合式自動重傳請求回饋通道索引方案 Download PDF

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TWI410076B
TWI410076B TW099113309A TW99113309A TWI410076B TW I410076 B TWI410076 B TW I410076B TW 099113309 A TW099113309 A TW 099113309A TW 99113309 A TW99113309 A TW 99113309A TW I410076 B TWI410076 B TW I410076B
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harq feedback
hfip
feedback channel
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TW201112672A (en
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Yujian Zhang
Hujun Yin
Yi Hsuan
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Intel Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • 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
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • 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
    • H04L1/1835—Buffer management
    • 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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—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
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Communication Control (AREA)

Description

無線通訊系統中之混合式自動重傳請求回饋通道索引方案
本申請案係有關IEEE 802.16m，尤係有關在IEEE 標準下之混合式自動重傳要求(Hybrid Automatic Repeat Request；簡稱HARQ)。
現階段最高技術的無線通訊標準廣泛地支援混合式自動重傳要求(HARQ)。在自動重傳要求(Automatic Repeat Request；簡稱ARQ)下，錯誤偵測資訊先被加入資料，然後才被傳輸，因而保證接收器能夠將該資料解碼。使用HARQ時，前向錯誤校正(Forward Error Correction；簡稱FEC)位元也被加入資料中。
電機及電子工程師協會(Institute of Electrical and Electronic Engineers；簡稱IEEE)界定了數種無線通訊標準，其中包括802.16e(寬頻無線存取(broadband wireless access))及802.16m(先進空中介面標準(advanced air interface standard))。本說明書中將IEEE 802.16e稱為"802.16e"或"寬頻無線存取標準"；本說明書中將IEEE 802.16m稱為"802.16m"或"先進空中介面標準"。
在HARQ操作期間，使用HARQ回饋通道。第1圖是HARQ回饋通道在該等兩種標準間之差異之一示意圖。該HARQ回饋通道根據資料叢訊的解碼結果而載送一肯定的確認(ACK)或一否定的確認(NACK)。在806.16e寬頻無線標準中，該HARQ回饋通道被稱為ACKCH 10。在806.16m先進空中介面標準中，當在上鏈中傳輸時，該HARQ回饋通道被稱為HARQ回饋控制通道20，且當在下鏈中傳輸時，該HARQ回饋通道被稱為HARQ回饋A-MAP(HF-A-MAP)30。
在現行802.16m標準中，先進式媒體存取協定(A-MAP)載送單點傳播(unicast)服務控制資訊。單點傳播服務控制資訊由特定使用者控制資訊以及非特定使用者控制資訊組成。如第2圖所示，特定使用者控制資訊被進一步分成在指定A-MAP 32中傳輸之指定資訊、HARQ回饋資訊、及功率控制資訊、HARQ回饋A-MAP 30、以及功率控制A-MAP 36。HARQ回饋A-MAP 30是在802.16m下於下鏈(第1圖)中之HARQ回饋通道。在非特定使用者A-MAP 38中傳輸非特定使用者控制資訊。
有一組被分配的HARQ回饋通道資源以及需要一方法，以便指定使HARQ回饋通道與資料叢訊相關聯之方式，此被稱為HARQ回饋通道索引。
 【發明內容及實施方式】
根據本發明所述之實施例，揭示了一種無線通訊系統中之HARQ回饋通道索引之增強式半明確的解決方案。可將該HARQ回饋通道索引方法應用於在下鏈中傳輸之HARQ回饋通道以及在上鏈中傳輸之HARQ回饋通道。
有三種HARQ回饋通道索引方法：明確的方法、隱含的方法、以及半明確的方法。在該明確的方法下，係在下鏈控制發信(802.16m中之指定A-MAP 32)的組內指定完整的HARQ回饋通道索引。在該隱含的方法中，係使HARQ回饋通道索引與某些傳輸參數相關聯，但是該索引並未被用於下鏈控制發信。相關聯的傳輸參數可包括資料叢訊資源索引以及控制通道索引等的傳輸參數。
使用半明確的方法時，涉及以發信通知一部分的HARQ回饋通道索引，而該部分的HARQ回饋通道索引與其他的傳輸參數結合，而形成完整的HARQ回饋通道索引。該半明確的方法之效益在於：與該明確的方法比較時，可節省發信的額外負擔。
802.16e標準支援用來得到HARQ回饋通道索引之明確的及隱含的方法兩者。在802.16m中，舉例而言，可明確地以發信通知HARQ回饋通道索引，而決定該索引。此種明確的發信將導致控制發信中之很多的額外負擔。該HARQ回饋通道索引方案提供了一種在最小的控制額外負擔下傳輸HARQ回饋通道索引之有效率的方式。
第3圖示出根據某些實施例的一HARQ回饋通道索引方法100之機制。HARQ回饋通道索引方法100在非特定使用者控制通道(802.16m中之在非特定使用者A-MAP 38)中採用了一增添的欄位。在第3圖中，以一被稱為HARQ回饋索引參數(HARQ Feedback Index Parameter；簡稱HFIP)之欄位50附加到非特定使用者A-MAP 38(亦如第2圖所示)。HFIP欄位50被用來指示如何根據被選擇的一個或多個傳輸參數以及在下鏈控制發信(802.16m中之指定A-MAP 32)上發信通知之部分索引而得到該HARQ回饋通道索引之選擇。在某些實施例中，HFIP欄位50具有NHFIP 個位元，因而提供了得到該HARQ回饋通道索引之最多個選擇。
HFIP 50中提供的該等選擇係將重點放在如何選擇及(或)轉換HARQ回饋通道索引計算中之各傳輸參數。在某些實施例中，有兩個實施HFIP 50之選項。在本說明書中被稱為選項A之第一選項中，有多個傳輸參數，且HFIP 50指示要被使用的傳輸參數之一子集。在本說明書中被稱為選項B之第二選項中，使用了單一傳輸參數，且HFIP 50指示該單一參數中之哪一部分被使用。
在某些實施例中，選項A被進一步細分為選項A1及A2。在選項A1中，諸如通訊台識別碼(Station Identifier；簡稱STID)等的一傳輸參數被選擇作為一基線。在選項A1之下，於計算該HARQ回饋通道索引時，總是使用該被選擇的基線參數。因此，HFIP欄位50被用來指示也被用於計算該HARQ回饋通道索引的一些其他參數之組合。下表1提供了實施2位元的HFIP 50的方式之一例子。
在該例子中，假設：HFIP 50中以發信通知之值是j，且對應的參數組M(j)={mi }。在該例子中，總是使用STID參數，最高有效位元(Most Significant Bit；簡稱MSB)指示是否使用了資源索引參數，而最低有效位元(Least Significant Bit；簡稱LSB)指示是否使用了MCS參數。例如，當HFIP 50是2(二進制的10)時，MSB是1，且LSB是0，因而指示：除了使用STID參數之外，也使用了資源索引參數(但並未使用MCS參數)以計算該HARQ回饋通道索引。
或者，在選項A2中，沒有任何參數是基線。HFIP 50因而指示被用來計算該HARQ回饋通道索引的所有參數之組合。HFIP 50中之零的值可指示不使用任何參數，且零值可指示參數之一特殊組合。下表2中示出將選項A2用來計算該HARQ回饋通道索引之一例子。
在該例子中，MSB指示是否使用資源索引參數，而LSB指示是否使用STID參數。例如，當HFIP 50值是2(二進制的10)時，MSB是1，且LSB是0，因而指示：將資源索引參數用來計算該HARQ回饋通道索引，但是並未使用STID參數。請注意，零的HFIP 50指示STID及MCS參數都被用來計算該HARQ回饋通道索引。
在某些實施例中，當單一參數被用來計算該HARQ回饋通道索引時，可使用選項B。在該例子中，該HARQ回饋通道索引參數指示單一傳輸參數中之哪一部分被用來計算該HARQ回饋通道索引。在選項B中，假設使用了STID參數。在某些實施例中，將右移運算子(>>)用來選擇該STID參數中被用來計算該HARQ回饋通道索引之部分。右移運算a >>b = a /2 b ，其中 x 是x的弱取整(floor)，換言之，最大整數小於或等於x。例如，15>>1=7，15>>2=3。在選項B中，假設HFIP 50之值是j，則可將STID>>(j*sf)用來選擇該STID參數的一部份，其中sf是可在系統中被配置的或可在標準中指定的比例因數(scaling factor)。sf的可能值可以是1、2等的值。
對於前文所述之選項A1而言，第4圖示出在某些實施例中使用計算該HARQ回饋通道索引之一模數運算(modulo operation)之一簡單機制。(同樣地，第5圖示出使用選項B時的計算流程。例如，對於在下鏈中(第1圖)傳輸的HARQ回饋A-MAP(HF-A-MAP)30而言，假設：
在指定A-MAP 32中以發信告知之HF-A-MAP索引是n(方塊102)
被配置的HF-A-MAP之總數是NHF-A-MAP (方塊104)
HFIP 50之值是j(方塊106)
然後，由下式得到一相關聯的完整HF-A-MAP索引：
(P(j)+n)mod NHF-A-MAP ，
如第4圖(方塊108)所示，其中P(j)是j的函數，且根據前文所述之不同的選項而使用P(j)：
選項A：，其中係根據該值j而選擇集合{mi }(方塊112)
選項B：P(j)=STID>>(j*sf)(第5圖)
例如，假設使用選項A1，換言之，將一完整HF-A-MAP索引計算為mod NHF-A-MAP 。假設NHF-A- MAP =16，j=2，n=1，則資源索引參數=15，且STID參數=334。因為j=2，所以STID及資源索引參數被用來根據表1而計算一完整HF-A-MAP索引。因此，使用上述之加總方程式時，該完整HF-A-MAP索引是(15+334+1)mod 16=14。
第6圖以示意圖示出根據某些實施例而以HARQ回饋通道索引方法100計算HF-A-MAP索引之基地台70及行動台80操作。在以子訊框a表示之一第一子訊框中，一基地台70將非特定使用者A-MAP 38及指定A-MAP 32傳輸到一行動台80。非特定使用者A-MAP 38包含HFIP欄位50，而指定A-MAP 32包含部分HF-A-MAP索引40。行動台80遵循以其為目標的指定A-MAP中之排程，且在以子訊框b表示之一後續子訊框中傳輸上鏈資料。根據HFIP欄位50及部分HF-A-MAP索引40，基地台70及行動台80兩者皆可根據本發明所述之方法計算一完整HF-A-MAP索引100。因此，基地台70可根據所計算出的該索引而傳輸相關聯的HF-A-MAP，且行動台80然後根據所計算出的該索引而接收該HF-A-MAP 100。
HARQ回饋通道索引方法100因而提供了一種用來明確地傳輸HARQ回饋通道索引之機制。藉由在非特定使用者控制通道(非特定使用者A-MAP 38)加入一單一欄位，即可傳送如何根據被選擇的一個或多個傳輸參數以及在下鏈控制發信(指定A-MAP 32中之部分HF-A-MAP 索引40)上發信告知之部分索引而得到該HARQ回饋通道索引之選擇。現有的解決方案不容許如同本發明的某些實施例中提出的得到該HARQ回饋通道索引之不同機制。
該HARQ回饋通道索引方法提供了一種無線通訊系統中之HARQ回饋通道索引裝置及方法。在某些實施例中，裝置將包含一基地台排程器、一基地台HF-A-MAP傳輸器、一行動台HF-A-MAP接收器、及一行動台HARQ回饋通道傳輸器等的組件。在802.16m中，應決定HARQ回饋通道索引。一種方式是明確地發信通知該索引。然而，此種方式將導致控制發信中之很多的額外負擔。該HARQ回饋通道索引方法提供了一種在最小的控制額外負擔下傳輸HARQ回饋通道索引之有效率的方式。
第7圖是根據某些實施例的一HARQ回饋通道索引基地台端裝置200之一示意方塊圖。基地台排程器60使用一HF-A-MAP控制器65、一非特定使用者A-MAP控制器70、以及一指定A-MAP控制器75而計算及設定HFIP 50、部分HF-A-MAP索引40、及各相關部分之值。然後，構成該HF-A-MAP索引之相關聯的位元被多工器80多工處理，且於下鏈傳輸期間被傳輸到該行動台。
雖然以與有限數目的實施例有關之方式說明了本申請案，但是熟悉本門技術者當可了解本申請案的許多修改及變化。最後的申請專利範圍將涵蓋在本發明的真實精神及範圍內之所有此類修改及變化。
10．．．確認通道
20．．．HARQ回饋控制通道
30．．．HARQ回饋A-MAP
32．．．指定A-MAP
36．．．功率控制A-MAP
38．．．非特定使用者A-MAP
50．．．HFIP欄位
40．．．部分HF-A-MAP索引
100．．．完整HF-A-MAP索引
60．．．基地台排程器
65．．．HF-A-MAP控制器
70．．．非特定使用者A-MAP控制器
75．．．指定A-MAP控制器
80．．．多工器
若參照前文中之詳細說明，並配合各附圖，將可更佳地了解且因而更易於理解本文件的前文所述之觀點及許多伴隨之優點，而在所有各附圖中，除非另有指定，否則類似的元件符號將參照到類似的部分。
第1圖是根據先前技術的在寬頻無線存取及先進空中介面標準兩者下之一HARQ回饋通道之一示意圖；
第2圖是根據先前技術的HARQ回饋通道索引方法使用的通道之一示意圖；
第3圖是根據某些實施例而將被加入第2圖所示HARQ回饋通道索引方法使用的一非特定使用者A-MAP的一HARQ回饋索引參數之一示意圖；
第4圖是根據某些實施例的HARQ回饋通道索引方法於實施選項A時的操作之一流程圖；
第5圖是根據某些實施例的HARQ回饋通道索引方法於實施選項B時的操作之一流程圖；
第6圖是根據某些實施例的用於下鏈中之HARQ回饋A-MAP的基地台及行動台操作之一示意圖；以及
第7圖是根據某些實施例的一HARQ回饋通道索引裝置之一示意圖。
60．．．基地台排程器
65．．．HF-A-MAP控制器
70．．．非特定使用者A-MAP控制器
75．．．指定A-MAP控制器
80．．．多工器

Claims (20)

  1. 一種執行混合式自動重傳要求(HARQ)索引之方法，該方法包含：在一第一子訊框中將包含一HARQ回饋索引參數(HFIP)之一非特定使用者先進式媒體存取協定(A-MAP)傳輸到一行動台，其中該A-MAP包含單點傳播服務控制資訊；在該第一子訊框中將包含一部分HARQ回饋A-MAP(HF-A-MAP)索引之一指定A-MAP傳輸到該行動台；根據目標為該行動台的該指定A-MAP中之排程而自該行動台接收一第二子訊框中之上鏈資料；以及使用該HFIP及該部分HARQ回饋A-MAP索引而計算一完整HARQ回饋索引。
  2. 如申請專利範圍第1項之方法，其中使用該HFIP及該部分HARQ回饋A-MAP索引兩者而計算一完整HARQ回饋索引進一步包含：計算(P(j)+n)mod NHF-A-MAP ，其中j是在該HFIP中發現的值，P(j)是j的一函數，n是在該部分HF-A-MAP索引中發現的值，且NHF-A-MAP 是被配置的HF-A-MAP之總數。
  3. 如申請專利範圍第2項之方法，其中解該方程式(P(j)+n)mod NHF-A-MAP 進一步包含：計算，其中係根據該值j而選擇集合{mi }。
  4. 如申請專利範圍第3項之方法，其中一傳輸參數被選擇為一基線參數，其中該基線參數被用來計算該HARQ回饋通道索引。
  5. 如申請專利範圍第3項之方法，其中並無任何傳輸參數被選擇為一基線參數。
  6. 如申請專利範圍第2項之方法，其中解該方程式(P(j)+n)mod NHF-A-MAP 進一步包含：計算P(j)=TP>>(j*sf)，其中sf是一比例因數，且TP是一傳輸參數。
  7. 一種執行混合式自動重傳要求(HARQ)索引之方法，該方法包含：自一基地台在一第一子訊框中接收包含一HARQ回饋索引參數(HFIP)之一非特定使用者先進式媒體存取協定(A-MAP)，其中該A-MAP包含單點傳播服務控制資訊；自該基地台在該第一子訊框中接收包含一部分HARQ回饋A-MAP(HF-A-MAP)索引之一指定A-MAP；以及根據該指定A-MAP中之排程而將一第二子訊框中之上鏈資料傳輸到該基地台；其中係使用該HFIP及該部分HARQ回饋A-MAP索引而計算一完整HARQ回饋索引。
  8. 如申請專利範圍第7項之方法，其中使用該HFIP及該部分HARQ回饋A-MAP索引兩者而計算一完整HARQ回饋索引進一步包含：計算(P(j)+n)mod NHF-A-MAP ，其中j是在該HFIP中發現的值，P(j)是j的一函數，n是在該部分HF-A-MAP索引中發現的值，且NHF-A-MAP 是被配置的HF-A-MAP之總數。
  9. 如申請專利範圍第8項之方法，其中解該方程式(P(j)+n)mod NHF-A-MAP 進一步包含：計算，其中係根據該值j而選擇集合{mi }。
  10. 如申請專利範圍第9項之方法，其中一傳輸參數被選擇為一基線參數，其中該基線參數被用來計算該HARQ回饋通道索引。
  11. 如申請專利範圍第9項之方法，其中並無任何傳輸參數被選擇為一基線參數。
  12. 如申請專利範圍第8項之方法，其中解該方程式(P(j)+n)mod NHF-A-MAP 進一步包含：計算P(j)=TP>>(j*sf)，其中sf是一比例因數，且TP是一傳輸參數。
  13. 一種計算混合式自動重傳要求(HARQ)回饋通道索引之系統，該系統包含：包含一HARQ回饋索引參數(HFIP)之一非特定使用者先進式MAP控制器；以及包含一部分HARQ先進式MAP(HF-A-MAP)索引之一指定先進式MAP控制器；其中自該HFIP及該部分HF-A-MAP索引得到一完整HARQ回饋通道索引。
  14. 如申請專利範圍第13項之系統，其中該HFIP是兩位元的值。
  15. 如申請專利範圍第13項之系統，其中使用下列公式得到該完整HARQ回饋通道索引：(P(j)+n)mod NHF-A-MAP ，其中j是在該HFIP中發現的值，P(j)是j的一函數，n是在該部分HF-A-MAP索引中發現的值，且NHF-A-MAP 是被配置的HF-A-MAP之總數。
  16. 如申請專利範圍第15項之系統，其中有多個傳輸參數，且該HFIP指示被用來計算該完整HARQ回饋通道索引的一子集之傳輸參數。
  17. 如申請專利範圍第16項之系統，其中該子集之傳輸參數中之一傳輸參數是一基線參數，且該HFIP指示被用來連同該基線參數而計算該完整HARQ回饋通道索引的一子集之其餘傳輸參數。
  18. 如申請專利範圍第15項之系統，其中一單一傳輸參數被用來計算該完整HARQ回饋通道索引，且該HFIP指示該單一傳輸參數中之哪一部分被用來執行該計算。
  19. 如申請專利範圍第15項之系統，其中對該HFIP執行一右移運算，而得到該完整HARQ回饋通道索引。
  20. 如申請專利範圍第15項之系統，其中使用一比例因數而得到該完整HARQ回饋通道索引。
TW099113309A 2009-04-28 2010-04-27 無線通訊系統中之混合式自動重傳請求回饋通道索引方案 TWI410076B (zh)

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