CN102415017B - 无线通信系统中的harq反馈信道编索引方案 - Google Patents

无线通信系统中的harq反馈信道编索引方案 Download PDF

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CN102415017B
CN102415017B CN201080019460.9A CN201080019460A CN102415017B CN 102415017 B CN102415017 B CN 102415017B CN 201080019460 A CN201080019460 A CN 201080019460A CN 102415017 B CN102415017 B CN 102415017B
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CN102415017A (zh
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Y·张
Y·宣
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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
    • 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
    • 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
    • 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
    • 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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  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
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Abstract

公开一种用于在无线通信系统中HARQ反馈信道编索引的增强型半显式解决方案。该HARQ反馈信道编索引方法可适用于在下行链路中传送的HARQ反馈信道以及在上行链路中传送的HARQ反馈信道。

Description

无线通信系统中的HARQ反馈信道编索引方案
技术领域
本申请涉及IEEE 802.16m，更具体来说，涉及按照IEEE标准的混合自动重传请求(HARQ)。
背景技术
在当前技术发展水平的无线通信标准中普遍支持混合自动重传请求(HARQ)。按照自动重传请求(ARQ)，在传输之前向数据添加错误检测信息，确保接收器能够将数据解码。对于HARQ，也对数据添加额外的前向纠错(FEC)位。
电气和电子工程师协会(IEEE)定义了若干个无线通信标准，包括802.16e(宽带无线接入)和802.16m(高级空中接口标准)。IEEE 802.16e在本文称为“802.16e”或“宽带无线接入标准”；IEEE 802.16m在本文称为“802.16m”或“高级空中接口标准”。
在HARQ操作期间，使用HARQ反馈信道。图1中描绘了用于HARQ反馈信道的两种标准之间的差异的示意图。取决于数据突发的解码结果，HARQ反馈信道要么承载肯定确认(ACK)，要么承载否定确认(NACK)。对于802.16e宽带无线标准，HARQ反馈信道称为ACKCH 10。对于802.16m高级空中接口标准，HARQ反馈信道当在上行链路中传送时称为HARQ反馈控制信道20，而当在下行链路中传送时称为HARQ反馈A-MAP(HF-A-MAP)30。
在当前的802.16m标准中，高级MAP(A-MAP)承载单播服务控制信息。单播服务控制信息由用户特定的控制信息和非用户特定的控制信息组成。用户特定的控制信息进一步分为分别在指配A-MAP 32、HARQ反馈A-MAP 30和功率控制A-MAP 36中传送的指配信息、HARQ反馈信息和功率控制信息，如图2中所示。HARQ反馈A-MAP30是按照802.16m在下行链路中的HARQ反馈信道(图1)。非用户特定的控制信息是在非用户特定的A-MAP 38中传送的。
分配了一组HARQ反馈信道资源，并且需要一种方法来指定如何将HARQ反馈信道与数据突发相关联，这称为HARQ反馈信道编索引。
附图说明
本文的以上方面和许多伴随的优点将变得更容易理解，因为通过结合附图时参考以下详细描述会更好地理解它们，其中，除非另外指出，否则在各图中类似的参考标号表示类似的部分。
图1是根据现有技术按照宽带无线接入和高级空中接口标准的HARQ反馈信道的示意图；
图2是根据现有技术由HARQ反馈信道编索引方法所使用的信道的示意图；
图3是根据一些实施例由图2的HARQ反馈信道索引方法使用的要添加到非用户特定的A-MAP中的HARQ反馈索引参数的示意图；
图4是示出根据一些实施例在实现选项A时HARQ反馈信道编索引方法的操作的流程图；
图5是示出根据一些实施例在实现选项B时HARQ反馈信道编索引方法的操作的流程图；
图6是根据一些实施例用于下行链路中的HARQ反馈A-MAP的基站和移动台操作的示意图；以及
图7是根据一些实施例的HARQ反馈信道编索引设备的示意图。
具体实施方式
根据本文描述的实施例，公开一种用于在无线通信系统中HARQ反馈信道编索引的增强型半显式解决方案。该HARQ反馈信道编索引方法可适用于在下行链路中传送的HARQ反馈信道以及在上行链路中传送的HARQ反馈信道。
现有三种HARQ反馈信道编索引方法：显式方法，隐式方法，以及半显式方法。按照显式方法，在下行链路控制信令中的集合(对于802.16m为指配A-MAP 32)内指定完整HARQ反馈信道索引。对于隐式方法，HARQ反馈信道索引与某些传输参数相关联，但是在下行链路控制信令中不使用该索引。相关联的传输参数可包括数据突发资源索引、控制信道索引、等等。
利用半显式方法涉及用信号通知部分HARQ反馈信道索引，该索引与其它传输参数组合而形成完整HARQ反馈信道索引。与显式方法相比，半显式方法的好处是可以节省信令开销。
802.16e标准支持用于获得HARQ反馈信道索引的显式和隐式方法。在802.16m中，作为一个实例，HARQ反馈信道索引可通过显式地用信号通知该索引来确定。这种显式信令导致控制信令中的大开销。HARQ反馈信道编索引方案提供了一种以最小化的控制开销来传送HARQ反馈信道索引的有效方法。
图3描绘根据一些实施例的HARQ反馈信道编索引方法100的技巧。HARQ反馈信道编索引方法100采用在非用户特定的控制信道(对于802.16m为非用户特定的A-MAP 38)中增加的字段。在图3中，非用户特定的A-MAP 38(也在图2中)附有称为HARQ反馈索引参数(HFIP)的字段50。HFIP字段50用于指示如何基于所选择的一个或多个传输参数和在下行链路控制信令(对于802.16m为指配A-MAP 32)上用信号通知的部分索引来导出HARQ反馈信道索引的选择。在一些实施例中，HFIP字段50具有NHFIP个位。
在HFIP 50中提供的选择集中在如何在HARQ反馈信道索引计算中选择和/或变换传输参数。在一些实施例中，有两个选项来实现HFIP50。在本文称为选项A的第一选项中，有多个传输参数，并且HFIP 50指示要使用的传输参数的子集。在本文称为选项B的第二选项中，使用单个传输参数，并且HFIP 50指示使用该单个参数的哪部分。
在一些实施例中，选项A被进一步细分为选项A1和A2。在选项A1中，选择一个传输参数作为基线，诸如，例如，站标识符(STID)参数。按照选项A1，在计算HARQ反馈信道索引时总是使用所选择的基线参数。因此，HFIP字段50用于指示在计算HARQ反馈信道索引时还要使用的其它参数的组合。下表1中给出如何可实现2位HFIP50的一个实例。
表1.HARQ反馈索引参数-选项A1
在这个实例中，假设HFIP 50中用信号通知的值是j，并且对应的参数集合M(j)＝{mi}。在这个实例中，总是使用STID参数，最高有效位(MSB)指示是否使用资源索引参数，而最低有效位(LSB)指示是否使用MCS参数。例如，当HFIP 50是2(二进制10)时，MSB是1，而LSB是0，这指示，除了使用STID参数之外，还使用资源索引参数(但是不使用MCS参数)来计算HARQ反馈信道索引。
或者，在选项A2中，没有参数是基线。因此，HFIP 50指示用于计算HARQ反馈信道索引的所有参数的组合。HFIP 50中的值0可指示不使用参数，或者值0可指示参数的特殊组合。下表2中示出使用选项A2来计算HARQ反馈信道索引的一个示例。
表2HARQ反馈索引参数-选项A2
在这个实例中，MSB指示是否使用资源索引参数，而LSB指示是否使用STID参数。例如，当HFIP 50值是2(二进制10)时，MSB是1，而LSB是0，因此，使用资源索引参数来计算HARQ反馈信道索引，而不使用STID参数。注意，为0的HFIP 50指示使用STID和MCS参数来计算HARQ反馈信道索引。
在一些实施例中，当使用单个参数来计算HARQ反馈信道索引时，可使用选项B。在这种情况下，HARQ反馈信道索引参数指示使用单个传输参数的哪部分来计算HARQ反馈信道索引。在选项B中，假设使用STID参数。在一些实施例中，使用右移操作符(＞＞)来选择用于计算HARQ反馈信道索引的STID参数的部分。右移操作其中是x的向下舍入，换句话说，是小于或等于x的最大整数。例如，15＞＞1＝7，15＞＞2＝3。在选项B中，假设HFIP50的值是j，那么STID＞＞(j*sf可用于选择STID参数的部分，其中sf是比例因子，它可配置在系统中或在标准中指定。sf的可能值可以是1、2、等等。
对于上文描述的选项A1，图4示出在一些实施例中利用模操作来计算HARQ反馈信道索引的简单机制。(类似地，图5示出其中使用选项B的计算流程)例如，对于在下行链路中传送的HARQ反馈A-MAP(HF-A-MAP)30(图1)，假设：
在指配A-MAP 32中用信号通知的部分HF-A-MAP索引40是n(框102)
所配置的HF-A-MAP的总数是NHF-A-MAP(框104)
HFIP 50值是j(框106)
那么，相关联的完整HF-A-MAP索引300由下式给定：
(P(j)+n)modNHF-A-MAP，
如图4所示(框108)，其中P(j)是j的函数，并且根据上文描述的选项来使用：
选项A：其中，基于值j选择集合{mi}(框112)
选项B：P(j)＝STID＞＞(j*sf)(图5)
例如，假设使用选项A1，换句话说，按照计算完整HF-A-MAP索引300。假设NHF-A-MAP＝16，j＝2，n＝1，资源索引参数＝15，并且STID参数＝334。由于j＝2，所以根据表1使用STID和资源索引参数来计算完整HF-A-MAP索引300。因此，利用以上求和式子，完整HF-A-MAP索引300为(15+334+1)mod 16＝14。
根据一些实施例，图6中示意性地示出用于通过HARQ反馈信道编索引方法100计算HF-A-MAP索引300的基站70和移动台80操作。在表示为子帧a的第一子帧中，基站70向移动台80传送非用户特定的A-MAP 38和指配A-MAP 32。非用户特定的A-MAP 38包含HFIP字段50，而指配A-MAP 32包含部分HF-A-MAP索引40。移动台80遵照针对它的指配A-MAP中的调度，并且在表示为子帧b的随后子帧中传送上行链路数据。根据HFIP字段50和部分HF-A-MAP索引40，基站70和移动台80都可按照本文描述的方法计算完整HF-A-MAP索引300。因此，基站70可根据所计算的索引来传送相关联的HF-A-MAP，而移动台80则根据所计算的索引300来接收所述HF-A-MAP。
因此，HARQ反馈信道编索引方法100提供了用于显式地传送HARQ反馈信道的索引的机制。通过在非用户特定的控制信道(非用户特定的A-MAP 38)中添加单个字段，传达了如何基于所选择的一个或多个传输参数和在下行链路控制信令上用信号通知的部分索引(指配A-MAP 32中的部分HF-A-MAP索引40)导出HARQ反馈信道索引的选择。当前的解决方案不允许如本文提出的在一些实施例中的用于导出HARQ反馈信道索引的不同机制。
所述HARQ反馈信道编索引方法提供了用于在无线通信系统中HARQ反馈信道编索引的设备和方法。在一些实施例中，设备会包括基站调度器、基站HF-A-MAP传送器、移动台HF-A-MAP接收器、移动台HARQ反馈信道传送器、等等。在802.16m中，应确定HARQ反馈信道索引。一种方法是显式地用信号通知该索引。但是，这会导致控制信令中的大开销。所述HARQ反馈信道编索引方法提供了一种以最小化的控制开销传送HARQ反馈信道索引的有效方法。
图7是根据一些实施例的HARQ反馈信道编索引基站侧设备200的示意性框图。利用HF-A-MAP控制器65、非用户特定的A-MAP控制器70和指配A-MAP控制器75，基站调度器60计算并设置HFIP 50、部分HF-A-MAP索引40和有关部分的值。然后，由复用器80复用组成HF-A-MAP索引300的相关联的位，并且在下行链路传送期间将其传送到移动台。
虽然关于有限数量的实施例描述了本申请，但是本领域技术人员将由此明白众多的修改和变化。所附权利要求意在涵盖落入本发明的真实精神和范围内的所有这类修改和变化。

Claims (17)

1. 一种执行混合自动重传请求(HARQ)编索引的方法，所述方法包括：
在第一子帧中向移动台传送包括HARQ反馈索引参数(HFIP)的非用户特定的高级映射(A-MAP)，其中所述A-MAP包含单播服务控制信息；
在所述第一子帧中向所述移动台传送包括部分HARQ反馈A-MAP(HF-A-MAP)索引的指配A-MAP；
按照针对所述移动台的所述指配A-MAP中的调度，在第二子帧中从所述移动台接收上行链路数据；以及
通过计算                                               ，利用所述HFIP和所述部分HARQ反馈A-MAP索引来计算完整HARQ反馈索引，其中j是在所述HFIP中得到的值，P(j)是j的函数，n是在所述部分HF-A-MAP索引中得到的值，并且N HF-A-MAP 是所配置的HF-A-MAP的总数。
2. 如权利要求1所述的方法，对式子求解进一步包括：
计算  ，其中，基于值j来选择集合{m i }。
3. 如权利要求2所述的方法，其中，选择一个传输参数作为基线参数，其中，所述基线参数用于计算HARQ反馈信道索引。
4. 如权利要求2所述的方法，其中，不选择传输参数作为基线参数。
5. 如权利要求1所述的方法，对所述式子求解进一步包括：
计算，其中sf是比例因子，并且TP是传输参数。
6. 一种执行混合自动重传请求(HARQ)编索引的方法，所述方法包括：
在第一子帧中从基站接收包括HARQ反馈索引参数(HFIP)的非用户特定的高级映射(A-MAP)，其中所述A-MAP包含单播服务控制信息；
在所述第一子帧中从所述基站接收包括部分HARQ反馈A-MAP(HF-A-MAP)索引的指配A-MAP；
按照所述指配A-MAP中的调度，在第二子帧中向所述基站传送上行链路数据；以及
如下所述利用所述HFIP和所述部分HARQ反馈A-MAP索引来计算完整HARQ反馈索引：
计算，其中j是在所述HFIP中得到的值，P(j)是j的函数，n是在所述部分HF-A-MAP索引中得到的值，并且N HF-A-MAP 是所配置的HF-A-MAP的总数。
7. 如权利要求6所述的方法，对式子求解进一步包括：
计算  ，其中，基于值j来选择集合{m i }。
8. 如权利要求7所述的方法，其中，选择一个传输参数作为基线参数，其中，所述基线参数用于计算HARQ反馈信道索引。
9. 如权利要求7所述的方法，其中，不选择传输参数作为基线参数。
10. 如权利要求6所述的方法，对所述式子求解进一步包括：
计算，其中sf是比例因子，并且TP是传输参数。
11. 一种计算混合自动重传请求(HARQ)反馈信道索引的系统，所述系统包括：
包括HARQ反馈索引参数(HFIP)的非用户特定的高级映射控制器；以及
包括部分HARQ高级映射(HF-A-MAP)索引的指配高级映射控制器；
其中，利用下式从所述HFIP和所述部分HF-A-MAP索引获得完整HARQ反馈信道索引：
，
其中，j是在所述HFIP中得到的值，P(j)是j的函数，n是在所述部分HF-A-MAP索引中得到的值，并且N HF-A-MAP 是所配置的HF-A-MAP的总数。
12. 如权利要求11所述的系统，其中，所述HFIP是两位的值。
13. 如权利要求11所述的系统，其中，有多个传输参数，并且所述HFIP指示用于计算所述完整HARQ反馈信道索引的传输参数的子集。
14. 如权利要求13所述的系统，其中，所述传输参数的子集中的一个传输参数是基线参数，并且所述HFIP指示与所述基线参数一起用于计算所述完整HARQ反馈信道索引的剩余传输参数的子集。
15. 如权利要求11所述的系统，其中，使用单个传输参数来计算所述完整HARQ反馈信道索引，并且所述HFIP指示使用所述单个传输参数的哪个部分来执行所述计算。
16. 如权利要求11所述的系统，其中，通过对所述HFIP执行右移操作来获得所述完整HARQ反馈信道索引。
17. 如权利要求11所述的系统，其中，利用比例因子来获得所述 完整HARQ反馈信道索引。
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