CN105164949A - Lte网络中用于支持协作多点传输的中央处理单元和方法 - Google Patents

Lte网络中用于支持协作多点传输的中央处理单元和方法 Download PDF

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CN105164949A
CN105164949A CN201480024879.1A CN201480024879A CN105164949A CN 105164949 A CN105164949 A CN 105164949A CN 201480024879 A CN201480024879 A CN 201480024879A CN 105164949 A CN105164949 A CN 105164949A
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harq
harq procedure
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阿列克谢·达维多夫
格雷戈里·摩罗佐维
何宏
阿波斯托洛斯·帕帕萨娜西欧
韩承希
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Abstract

本文一般地描述了用于在具有非理想回程链路的3GPP?LTE网络中支持协作多点(CoMP)传输的中央处理单元和方法的实施例。在一些实施例中,CPU可以被安排用于通过回程链路为下属的增强型节点B(eNB)调度和分配资源以用于CoMP传输。调度可以包括额外数量的HARQ过程以至少部分地补偿回程链路延迟。

Description

LTE网络中用于支持协作多点传输的中央处理单元和方法
优先权声明
本申请要求于2013年12月12日递交的美国专利申请No.14/104,725的优先权权益,该美国专利申请要求于2013年6月7日递交的美国临时专利申请No.61/832,644的优先权权益,这二者中每一个的全部内容通过引用被合并于此。
技术领域
实施例涉及无线通信。一些实施例涉及蜂窝网络(例如,根据长期演进(LTE)的3GPP标准(3GPPLTE)之一进行操作的E-UTRAN网络)中的协作多点(CoMP)操作。
背景技术
通过协调和合并来自多个天线位置的信号,CoMP操作可以使移动用户在访问和共享视频、照片及其他高带宽服务时,无论他们是在小区的中心附近还是在小区的外边缘,均能够享受始终如一的性能和质量。在CoMP操作期间,用户设备(UE)可以接收来自多个站点(例如,远程无线电头端(RRH)或下属的增强型节点B(eNB))的信号以利用多接收来提高链路性能并且降低干扰。在CoMP操作期间,中央处理单元(CPU)执行调度并且协调由下属的eNB通过非理想回程链路进行的传输。CoMP操作的一个问题是由于延迟导致难以对通过非理想回程链路向UE进行的传输进行调度和同步。此外,与非理想回程链路相关联的附加延迟使其难以支持来自所有下行链路子帧的连续传输。
因此,存在对于对通过非理想回程链路向UE进行的传输进行更高效地调度和同步的CoMP操作的系统和方法的一般需求。还存在对于在考虑与非理想回程链路相关联的附加延迟的情况下能够支持来自下行链路子帧的连续传输的CoMP操作的系统和方法的一般需求。
附图说明
图1根据一些实施例,示出了无线网络;
图2示出了针对具有回程链路延迟的下行链路CoMP传输的混合自动重传请求(HARQ)过程数分配;
图3根据一些实施例,示出了针对具有回程链路延迟的下行链路CoMP传输的HARQ过程数分配;
图4A根据一些实施例,示出了针对各种TDDUL/DL配置的HARQ过程的数量;
图4B示出了针对图4A的各种TDDUL/DL配置的子帧使用;
图5根据一些实施例,示出了针对具有回程链路延迟的下行链路CoMP传输的HARQ过程数分配;以及
图6根据一些实施例,示出了PUCCH资源的重配置。
具体实施方式
以下描述和附图足以说明具体实施例以使本领域技术人员能够实现这些实施例。其他实施例可以包括结构、逻辑、电学、过程以及其他改变。一些实施例的部分和特征可以被包括在其他实施例的部分和特征中或被其他实施例的部分和特征替代。权利要求中给出的实施例包括这些权利要求所有可能的等同形式。
图1根据一些实施例示出了无线网络。无线网络100可以是3GPPLTE网络,并且可以包括用户设备(UE)102、CPU104和多个下属的eNB106。根据实施例,网络100可以被配置用于协作多点(CoMP)操作,其中一个或多个下行链路信道107由eNB106以协作的方式进行传输。
根据一些实施例,CPU104可以被安排为通过回程链路105来为下属的eNB106调度和分配资源以用于CoMP传输。在这些实施例中,调度包括调度额外数量的混合自动重传请求(HARQ)过程来至少部分地补偿回程链路延迟。所增加数量的HAPQ过程可以通过允许调度和传输更大数量的下行链路子帧来支持连续的CoMP传输。下文将更详细地描述这些实施例以及其他实施例。
在一些实施例中,调度包括将下行链路控制信息(DCI)配置为包括HARQ过程数字段,该HARQ过程数字段具有额外比特来指示额外数量的HARQ过程。
在一些实施例中,对于频分双工(FDD)操作,DCI被配置为包括具有四个或更多个比特的HARQ过程数字段,并且对于时分双工(TDD)操作,DCI被配置为包括具有五个或更多个比特的HARQ过程数字段。在这些实施例中,DCI格式2D可以通过增加HARQ过程数字段的大小而被修改为DCI格式2E。
在一些实施例中,下属的eNB106被安排为响应于调度信息和由CPU104进行的资源分配来执行基带处理和LTE子帧生成。下属的eNB106被安排用于针对来自用户设备(UE)102的子帧的发送和接收的CoMP操作。在一些实施例中,CPU104可以是下属的eNB106之一的一部分,但这不是必须的。
图2示出了针对具有回程链路延迟的下行链路CoMP传输的HARQ过程数分配。图3根据一些实施例,示出了针对具有回程链路延迟的下行链路CoMP传输的HARQ过程数分配。在一些实施例中,调度包括调度某一数量的子帧用于由下属的eNB106进行的传输,该数量被指示在HARQ过程字段中,其中每个子帧与一个HARQ过程302相关联。在这些实施例中,CPU104可以禁止调度额外的子帧用于由下属的eNB106进行的传输,直到空闲的HARQ过程数304可用为止。
在一些实施例中,当从HARQ过程304之一接收到应答(ACK)或否定应答(NACK)时,CPU104可以调度额外的子帧用于由下属的eNB106进行传输。在这些实施例中,空闲的HARQ过程数可能直到从HARQ过程之一接收到应答(ACK)或否定应答(NACK)才可用。在这些实施例中,每个HARQ过程可以与单个HARQ过程ID相关联。在一些实施例中,对于FDD操作,HARQ过程的数量可配置为大于8。
图4A根据一些实施例,示出了针对各种TDDUL/DL配置的HARQ过程的数量。图4B示出了针对图4A的各种TDDUL/DL配置的子帧使用。对于TDD操作,HARQ过程的数量可以基于TDD上行链路/下行链路(UL/DL)配置402。
在一些实施例中,TDDUL/DL配置402指示帧内用于下行链路数据传输、用于上行链路数据传输以及用于特定字段传输的特定子帧。对于TDDUL/DL“0”配置,子帧数可配置为大于4,对于TDDUL/DL“1”配置,子帧数可配置为大于7,对于TDDUL/DL“2”配置,子帧数可配置为大于10,对于TDDUL/DL“3”配置,子帧数可配置为大于9,对于TDDUL/DL“4”配置,子帧数可配置为大于12,对于TDDUL/DL“5”配置,子帧数可配置为大于15,对于TDDUL/DL“6”配置,子帧数可配置为大于6。在这些实施例中,对于上行链路和下行链路,TDD操作可以使用相同的频率带。如图4B所示,通过在帧的不同子帧中携带UL和DL数据来隔离传输方向。传输方向之间的子帧分布可以适于数据流量,并且或是对称地(DL和UL子帧数量相等)做出或是不对称地做出。在图4B中,“D”表示在该子帧中传输DL数据,“U”表示传输上行链路数据,“S”表示在该子帧中可以传输特定字段(例如,DwPTS、GP和UpPTS)。
在这些实施例中,调度或资源分配决策以信号的方式被从CPU104发送到下属的eNB106,并且下属的eNB106根据由CPU做出的调度/资源分配决策来生成信号。在一些替换实施例中,CPU104可以是服务eNB或主eNB的一部分,而下属的eNB106可以是RRH。在这些实施例中,子帧由服务eNB生成并且通过回程链路105被传输到RRH,并且这些子帧包括完全生成的RF信号。RRH被配置为将完全生成的RF信号变换到更高频率,以由一个或多个天线传输,从而实现向UE的同步传输。
图5根据一些实施例,示出了针对具有回程链路延迟的下行链路CoMP传输的HARQ过程数分配。在一些实施例中,CPU104可以针对UE102配置单个资源分配,以在时域中跨越两个或更多连续的子帧,其中配置包括将单个HARQ过程ID505分配给单个资源分配。在这些实施例中的一些实施例中,针对单个资源分配,多个下行链路子帧502可以被捆绑为经捆绑的子帧。
在一些实施例中,单个资源分配中的下行链路子帧的数量是固定的预定数量。在图5所示的示例中,两个下行链路子帧502被示为被配置用于单个资源分配504并且具有HARQ过程ID3。被配置用于单个资源分配的子帧502(例如,被捆绑为经捆绑的子帧)具有相同的HARQ过程ID。在一些实施例中,单个资源分配中的下行链路子帧的数量可由无线电资源控制(RRC)信令来配置。
在一些实施例中,要与单个HARQ过程相关联的下行链路子帧的数量可以在下行链路控制信息(DCI)的HARQ过程字段中进行指示,该数量至少是2。CPU104可以通过回程链路105为下属的增强型节点B(eNB)106调度和分配资源,以用于协作多点(CoMP)传输。调度可以包括固定数量的HARQ过程。在这些实施例中,要与单个HARQ过程相关联的至少两个下行链路子帧至少部分地补偿回程链路延迟。
图6根据一些实施例,示出了PUCCH资源的重配置。在图6所示的一些实施例中,CPU104可以指示物理上行链路控制信道(PUCCH)资源以供用户设备(UE)用于HARQ应答(ACK)(HARQ-ACK)资源偏置(ARO)字段。UE可以被半静态地配置为针对多个PUCCH资源602以用于HARQ-ARQ反馈,并且被配置为动态确定PUCCH资源。在这些实施例中,PUCCH资源被预配置并且被CPU104知晓,以在CPU侧实现串扰功能。
CPU104可以被配置为对在相关联的上行链路帧的经指示的(即,经映射的)PUCCH资源上接收到的HARQ-ACK信息进行解码。下属的eNB106可以被安排为禁止向CPU104转发HARQ-ACK。在这些实施例中,通常由于从下属的eNB106向CPU104转发HARQ-ACK而导致的延迟可被降低。在这些实施例中,CPU104可以从由下属的eNB106服务的UE接收UL传输,CPU104针对该下属的eNB106执行决策。如果eNB向CPU104提供PUCCH资源的配置,则对从UE到eNB的ACK/NACK反馈的解码还可以在CPU104处执行。因此,通过避免从eNB向CPU104转发ACK/NACK来降低延迟。
在一些实施例中,UE被半静态地配置为针对四个或更多PUCCH资源。在一些实施例中,PUCCH资源被指示在相应的下行链路控制信道(例如,EPDCCH或PDCCH)的下行链路控制信息(DCI)中,并且UE被配置为根据DCI中的ARO字段来动态确定精确的PUCCH资源。在一些实施例中,根据第一控制信道元素(CCH)索引或增强型CCH(eCCH)索引来指示PUCCH资源。
在LTE-A版本11中,下行链路CoMP特征被引入以处理网络侧的干扰问题。为了协助传输点之间的协作,假设具有RRH的部署场景(现今被独立eNB覆盖)。在这样的场景中,RRH被通过使用接近理想的回程链路(例如,光纤链路)而连接到中央eNB。中央eNB执行调度并且向每个RRH发送完全生成的RF信号。然后,RRH仅将接收到的信号变换到更高频率以通过RRH天线发送。虽然该版本11的CoMP方法可以动态协调来自多个点的传输,但其实际实现是相当困难的,因为将RRH与中央eNB连接的光纤基础设备在多数的当前LTE-A网络部署中不可用。由于该限制,一些运营商可能不能从CoMP操作中获得性能效益。因此,为了协助具有非理想回程链路的网络中的CoMP操作,增强型CoMP被认为是LTE-A版本12的一部分。一个目的是评估具有典型回程链路的协作调度和协作波束成形(CS/CB)方案。
来自使用非理想回程链路的一个关键挑战是独立eNB的调度器通过回程链路进行通信以同步到UE的传输所需的额外延迟。然后对FDD中8ms的分组往返时间(RTT,从发送到重发)以及相应的HARQ过程的数量的当前假设可能不足以实现来自所有下行链路子帧的CoMP传输,并且相应地降低所预期的峰值数据速率性能。图2更详细地示出了这一问题:在图2中,假设调度过程在中央处理单元(CPU)中执行,该CPU可以与下属的eNB之一同地协作。然后,PDSCH调度决策(例如,资源位置、MCS、天线端口数等)被传递给eNB以进行基带和RF处理。可以看出,由于回程链路延迟,8个HARQ处理不足以支持来自所有下行链路子帧的连续传输。本文公开的实施例提供了若干解决方案来支持来自更大数量的下行链路子帧的连续CoMP传输。
在第一实施例中,HARQ过程的数量在FDD中从8增加到8+x(例如,x=8),而在TDD中从y增加到y+x,其中y是LTE规范中针对给定的TDDUL/DL配置所支持的现有的HARQ过程的数量。为了支持该提议,通过在FDD中将HARQ过程数字段的大小从3比特增加到4比特(或大于4的其他值),或者在TDD中将HARQ过程数字段的大小从4比特增加到5比特(或大于5的其他值),DCI格式2D被修改为DCI格式2E。图3示出了对更大的HARQ过程的数量的使用。
根据这些实施例,HARQ过程的数量在如图4A所示的与一个特定的TDDUL/DL配置相关联的TDD系统中为y,在FDD系统中为8。
在第二实施例中(如图5所示),多个下行链路子帧可以被捆绑,并且一个HARQ过程ID可被用于调度来自捆绑的子帧的传输。图5示出了对下行链路子帧捆绑的使用。参与捆绑的下行链路子帧的数量可以是固定的也可以是RRC可配置的。此外,为了避免从eNB到CPU转发HARQ-ACK,一个替换的解决方案可以描述为如下:
步骤-1:UE被半静态地配置有M个PUCCH资源(例如,M=4)以通过沿着PDSCH的现有HARQ-ACK时间线进行HARQ-ACK反馈。
在第三实施例中,PUCCH格式3资源的四个半静态配置的值可以针对UE进行预配置,并且可以根据在CPU侧已知的相应EPDCCH/PDCCH的DCI格式中的HARQ-ACK资源偏置(ARO)字段来动态确定精确的PUCCH资源。
在第四实施例中,指代用于子帧n中相应的PDCCH的传输的第一CCE或eCCE的数量的值在CPU处是已知的,因此当UE被配置有具有信道选择的PUCCH格式1b时,根据现有的PUCCH资源映射方法,与该PDSCH相关联的PUCCH资源对于CPU是已知的。图6根据这些实施例,示出了PUCCH资源的重配置。
步骤-2:对于由相应的PDCCH或EPDCCH或者指示子帧n中发布的下行链路半静态调度(semi-persistentscheduling,SPS)的PDCCH或EPDCCH的检测所指示的PDSCH传输,用于HARQ-ACK反馈的PUCCH资源或是根据更高层配置和DCI中的ARO值,或是根据步骤-1中所描述的第一CCE或eCCE索引来确定的。UE使用经映射的PUCCH资源、沿着现有的HARQ-ACK时间线反馈HARQ-ACK信息。关于HARQ-ACK时序方面,在UE侧对于HARQ-ACK反馈没有改变。
步骤-3:CPU对相关联的UL子帧的经映射的PUCCH资源上的HARQ-ACK信息进行解码。
在一些实施例中,UE102可以是便携式无线通信设备的一部分,该便携式无线通信设备例如是:个人数字助理(PDA)、具有无线通信功能的膝上型或便携式计算机、web平板、无线电话、智能电话、无线耳机、寻呼机、即时消息设备、数字照相机、接入点、电视、医学设备(例如,心率监测仪、血压检测仪等)或可以无线地接收和/或发送信息的其他设备。在一些实施例中,UE102可以包括键盘、显示器、非易失性存储器端口、多个天线、图形处理器、应用处理器、扬声器和其他移动设备元件中的一个或多个。显示器可以是包括触屏的LCD屏。在一些实施例中,eNB106和UE可以采用多个天线以进行多输入多输出(MIMO)操作。
4GLTECoMP紧密协调多个在地理上分离的eNB之间的操作,以提供联合调度和传输,并且提供对接收信号的联合处理。通过这种方式,小区边缘处的UE能够由两个或更多个eNB服务,从而尤其在小区边缘的条件下改善信号接收/发送并且增加吞吐量。
实际上,4GLTECoMP(协作多点)落入两个主要类别中——联合处理和/或协作调度或波束成形。联合处理发生于在向UE同时发送或从UE同时接收的多个实体(基站)之间存在协作的情况。协作调度或波束成形通常被称为CS/CB(协作调度/协作波束成形),其是UE利用单个发送或接收点(基站)进行传输的一种协作形式。然而,该通信通过在若干协作实体之间交换控制来做出。为了实现这些模式中的任一个,需要以快速的方式对信道属性进行非常详细的反馈,使得这些改变能够被做出。另一个需求是为了在eNB之间进行非常紧密的协作以协助数据的结合或小区的快速切换。用于协作多点(CoMP)的技术对于上行链路和下行链路而言是不同的。这是因为如下事实:eNB在网络中、被连接到其他eNB,而手机或UE是独立的元件。
下行链路LTECoMP
下行链路LTECoMP需要在若干个在地理上分离的、向UE进行传输的eNB之间进行动态协作。针对下行链路可以划分两种形式的协作多点:
用于在下行链路中进行传输的联合处理方案:使用LTECoMP的这一元素,数据被同时从多个不同的eNB传输到UE。其目的是提高接收信号质量和强度。其还可以具有主动消除来自针对其他UE的传输的干扰的目的。该种形式的协作多点对回程网络具有很高的要求,因为要被传输给UE的数据需要被发送给将其传输给UE的每个eNB。取决于有多少eNB将发送该数据,这可能很容易将网络中的数据量翻倍或增至三倍。除此之外,联合处理数据需要在CoMP区域中所涉及的所有eNB之间进行发送。
协作调度和/或波束成形:使用这一概念,针对单个UE的数据被从一个eNB发送。调度决策以及任意波束被协调以控制可能生成的干扰。该方法的一个优势是大大降低了对于跨越回程网络进行协作的需求,原因有两个:UE数据不必从多个eNB发送,因此只需要被指向一个eNB。调度决策和波束细节可以在多个eNB之间进行协调。
上行链路LTECoMP
联合接收和处理:这一形式背后的基本概念是利用不同站点处的天线。通过在不同的eNB之间进行协调,可以形成虚拟天线阵列。由eNB接收的信号随后被合并并被处理以产生最终输出信号。该技术允许接收强度非常低或者在一些区域中被干扰遮掩的信号,并且误差很少。该技术的一个缺点是大量数据需要在对其操作的eNB之间进行传输。
协作调度:该方案通过在eNB之间协调调度决策以使干扰最小化来操作。如下行链路的情形,这种形式在回程网络中提供了大大降低的负载,因为只需要在彼此协作的不同eNB之间传输调度数据。
在一些实施例中,由CPU104执行的操作可以由一个或多个功能元件来执行,并且可以被合并,并且可以由软件配置的元件(例如,包括数字信号处理器(DSP)的处理元件)和/或其他硬件元件的组合来实现。例如,一些元件可以包括一个或多个微处理器、DSP、现场可编程门阵列(FPGA)、专用集成电路(ASIC)、射频集成电路(RFIC)以及用于执行至少本文所描述的功能的各种硬件和逻辑电路的组合。在一些实施例中,功能元件可以指代在一个或多个处理元件上操作的一个或多个过程。
实施例可以在硬件、固件和软件中的一个或组合中实现。实施例还可以被实现为存储在计算机可读存储设备上的指令,该指令可被至少一个处理器读取并执行以执行本文所描述的操作。计算机可读存储设备可以包括用于以机器(例如,计算机)可读的形式来存储信息的任意非暂态机制。例如,计算机可读存储设备可以包括只读存储器(ROM)、随机存取存储器(RAM)、磁盘存储介质、光存储介质、闪存设备及其他存储设备和介质。一些实施例可以包括一个或多个处理器并且可以被配置有存储在计算机可读存储设备上的指令。
摘要被提供以符合要求摘要的37C.F.R.章1.72(b),其中摘要将允许读者确定本技术公开的性质和要点。其在理解其将不被用于限制或解释权利要求的范围或含义的情况下被提交。所附权利要求据此被合并到具体实施方式中,每个权利要求基于其自身作为单独的实施例。

Claims (20)

1.一种由3GPPLTE网络中的中央处理单元(CPU)执行的方法,该方法包括:
通过回程链路为下属的增强型节点B(eNB)调度和分配资源以用于协作多点(CoMP)传输,所述调度包括额外数量的混合自动重传请求(HARQ)过程以至少部分地补偿回程链路延迟。
2.如权利要求1所述的方法,其中所述调度包括将下行链路控制信息(DCI)配置为包括HARQ过程数字段,该HARQ过程数字段具有用来指示所述额外数量的HARQ过程的额外比特。
3.如权利要求2所述的方法,其中对于频分双工(FDD)操作,所述DCI被配置为包括具有四个或更多个比特的HARQ过程数字段,并且
对于时分双工(TDD)操作,所述DCI被配置为包括具有五个或更多个比特的HARQ过程数字段。
4.如权利要求3所述的方法,其中所述下属的eNB被安排为响应于由所述CPU进行的资源分配和调度信息来执行基带处理和LTE子帧生成,并且
其中所述下属的eNB被安排用于针对来自用户设备(UE)的子帧的发送和接收的CoMP操作。
5.如权利要求3所述的方法,其中调度包括调度用于由所述下属的eNB传输的某一数量的子帧,该数量被指示在所述HARQ过程字段中,其中每个子帧与一个HARQ过程相关联,并且
由所述CPU禁止调度用于所述下属的eNB进行的传输的额外子帧,直到空闲的HARQ过程数可用为止。
6.如权利要求5所述的方法,还包括当从所述HARQ过程之一接收到应答(ACK)或否定应答(NACK)时,所述CPU调度所述额外子帧用于由所述下属的eNB进行的传输。
7.如权利要求3所述的方法,其中对于FDD操作,所述HARQ过程的数量可配置为大于8,并且
其中对于TDD操作,所述HARQ过程的数量基于TDD上行链路/下行链路(UL/DL)配置。
8.如权利要求7所述的方法,其中所述TDDUL/DL配置指示帧内用于下行链路数据传输、用于上行链路数据传输以及用于特定字段传输的的特定子帧;
其中对于TDDUL/DL“0”配置,子帧的数量可配置为大于4;
其中对于TDDUL/DL“1”配置,子帧的数量可配置为大于7;
其中对于TDDUL/DL“2”配置,子帧的数量可配置为大于10;
其中对于TDDUL/DL“3”配置,子帧的数量可配置为大于9;
其中对于TDDUL/DL“4”配置,子帧的数量可配置为大于12;
其中对于TDDUL/DL“5”配置,子帧的数量可配置为大于15;
其中对于TDDUL/DL“6”配置,子帧的数量可配置为大于6。
9.如权利要求2所述的方法,还包括:
将多个下行链路子帧捆绑为单个经捆绑的子帧;以及
将单个HARQ过程ID与每个经捆绑的子帧相关联,
其中每个经捆绑的子帧504包括至少两个下行链路子帧502。
10.一种被安排为在3GPPLTE网络中操作的中央处理单元(CPU),所述CPU包括被安排为通过回程链路为下属的增强型节点B(eNB)调度和分配资源以用于协作多点(CoMP)传输的处理电路和网络接口电路,所述调度包括额外数量的混合自动重传请求(HARQ)过程来至少部分地补偿回程链路延迟,
其中所述调度包括将下行链路控制信息(DCI)配置为包括HARQ过程数字段,该HARQ过程数字段具有额外比特来指示所述额外数量的HARQ过程。
11.如权利要求10所述的CPU,其中对于频分双工(FDD)操作,所述DCI被配置为包括具有四个或更多个比特的HARQ过程数字段,并且
对于时分双工(TDD)操作,所述DCI被配置为包括具有五个或更多个比特的HARQ过程数字段。
12.一种由被配置用于协作多点(CoMP)传输的3GPPLTE网络中的中央处理单元(CPU)执行的方法,该方法包括:
针对用户设备(UE)配置单个资源分配,以在时域中跨越两个或更多个连续的子帧,其中配置包括将单个混合自动重传请求(HARQ)过程ID分配给所述单个资源分配。
13.如权利要求12所述的方法,还包括针对所述单个资源分配,将多个下行链路子帧502捆绑为经捆绑的子帧。
14.如权利要求12所述的方法,其中所述单个资源分配中的下行链路子帧的数量是固定的预定数量。
15.如权利要求12所述的方法,其中所述单个资源分配中的下行链路子帧的数量可由无线电资源控制(RRC)信令来配置。
16.如权利要求12所述的方法,还包括:
在下行链路控制信息(DCI)的HARQ过程字段中指示要与单个HARQ过程相关联的下行链路子帧的数量,该数量至少是2;
通过回程链路为下属的增强型节点B(eNB)调度和分配资源以用于协作多点(CoMP)传输,所述调度包括固定数量的HARQ过程,
其中要与单个HARQ过程相关联的至少两个下行链路子帧至少部分地补偿回程链路延迟。
17.一种由3GPPLTE网络中的中央处理单元(CPU)执行的方法,其中所述CPU通过回程链路为下属的增强型节点B(eNB)调度和分配资源以用于协作多点(CoMP)传输,该方法包括:
由所述CPU指示物理上行链路控制信道(PUCCH)资源以供用户设备(UE)用于混合自动重传请求(HARQ)应答(ACK)(HARQ-ACK)资源偏置(ARO)字段,其中UE被半静态地配置为针对多个PUCCH资源以用于HARQ-ARQ反馈,并且被配置为动态确定所述PUCCH资源;以及
由所述CPU对在相关联的上行链路帧的经指示的(即,经映射的)PUCCH资源上接收到的HARQ-ACK信息进行解码,
其中所述下属的eNB被安排为禁止向所述CPU转发HARQ-ACK。
18.如权利要求17所述的方法,其中所述UE被半静态地配置为针对四个或更多PUCCH资源。
19.如权利要求17所述的方法,其中所述PUCCH资源被指示在相应的下行链路控制信道的下行链路控制信息(DCI)中,并且
其中UE被配置为根据所述DCI中的ARO字段来动态确定精确的PUCCH资源。
20.如权利要求17所述的方法,其中所述PUCCH资源是根据第一控制信道元素(CCH)索引或增强型CCH(eCCH)索引来指示的。
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