CN104205686B - 无线通信网络中增强型物理下行链路控制信道的映射 - Google Patents

无线通信网络中增强型物理下行链路控制信道的映射 Download PDF

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CN104205686B
CN104205686B CN201380017102.8A CN201380017102A CN104205686B CN 104205686 B CN104205686 B CN 104205686B CN 201380017102 A CN201380017102 A CN 201380017102A CN 104205686 B CN104205686 B CN 104205686B
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ecce
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CN104205686A (zh
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朱源
陈晓刚
李庆华
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Intel Corp
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Abstract

在实施例中，无线通信网络的演进型节点B(eNB)可以将一个物理资源块(PRB)对的各个增强型控制信道单元(eCCE)映射到该PRB对的多个非连续的增强型资源单元组(eREG)。eNB还可以将所述多个eREG映射到各个天线端口，以便向UE进行传输，其中各个天线端口与连续的一组eREG相关联。eNB可以将增强型物理下行链路控制信道(ePDCCH)的至少一部分分配到所述eCCE中的一个或多个，以便向UE进行传输。另外地或者替代地，eNB可以将多个PRB对的eCCE映射到多个分布式资源块(DRB)对。

Description

无线通信网络中增强型物理下行链路控制信道的映射
相关申请的交叉引用
本申请要求享受于2012年4月13日提交的、名称为“ADVANCED WIRELESSCOMMUNICATION SYSTEMS AND TECHNIQUES”的美国临时专利申请No.61/624,185和于2012年11月8日提交的、名称为“MAPPING OF ENHANCED PHYSICAL DOWNLINK CONTROL CHANNELSIN A WIRELESS COMMUNICATION NETWORK”的美国专利申请No.13/672,560的优先权。故以引用方式将这两份公开内容并入本文。
技术领域
概括地说，本发明的实施例涉及通信领域，更具体地说，本发明的实施例涉及无线通信网络中增强型物理下行链路控制信道的映射。
背景技术
在无线通信网络中，演进型节点B(eNB)向用户设备发送诸如增强型物理下行链路控制信道(ePDCCH)之类的控制信道。ePDCCH包括：下行链路控制信息(DCI)，DCI具有UE为了接收物理下行链路共享信道(PDSCH)而使用的信息。在很多无线通信网络中，eNB可以使用集中式或者分布式ePDCCH传输。但是，与集中式ePDCCH传输相比，分布式ePDCCH传输可能呈现不同的干扰特征(fingerprint)，这会使得相邻小区很难消除这种干扰。
另外，在一些无线通信网络中，不容许与ePDCCH在相同的物理资源块(PRB)对中发送PDSCH。由于在用于发送ePDCCH的部分或者全部的PRB对中存在未利用的资源单元，因此这可能造成带宽浪费。
附图说明
通过结合附图的以下详细描述，将容易理解实施例。为了有助于该描述，相同的附图标记标示相同的结构单元。在附图的各图中，通过举例的方式而不是限制的方式，示出了实施例。
图1是示出了根据各个实施例的无线通信网络的框图。
图2是示出了根据各个实施例的物理资源块(PRB)对的框图。
图3是示出了根据各个实施例的、用于将一个PRB对的增强型资源单元组(eREG)映射到各自的增强型控制信道单元(eCCE)和天线端口的映射方案的图。
图4是示出了根据各个实施例的、用于将一个替代的PRB对的eREG映射到各自的eCCE和天线端口的映射方案的图。
图5是示出了根据各个实施例的、用于将多个PRB对的eCCE映射到多个分布式资源块(DRB)对的映射方案的图。
图6是示出了根据各个实施例可以由用户设备执行的、用于接收增强型物理下行链路控制信道(ePDCCH)和物理下行链路共享信道(PDSCH)的方法的流程图。
图7是示出了根据各个实施例的示例性计算系统的框图。
具体实施方式
本公开内容的说明性实施例包括但不限于：用于在无线通信网络中映射增强型物理下行链路控制信道的方法、系统和装置。
将使用本领域技术人员通常所使用的术语来对说明性实施例的各个方面进行描述，以便将它们的工作实质传达给本领域其他技术人员。然而，对于本领域技术人员将显而易见的是，可以仅使用所描述的方面中的某些来实施替代实施例。出于解释的目的，阐述了具体的数字、材料和配置，以便提供对说明性实施例的彻底理解。然而，对于本领域技术人员将显而易见的是，可以不用这些具体细节而实施替代的实施例。在其它实例中，省略或简化了公知的特征，以免模糊说明性实施例。
此外，各种操作将以最有助于理解说明性实施例的方式依次被描述为多个分立的操作；然而，描述的顺序不应当被解释为暗示这些操作必然是顺序依赖的。具体地说，不需要按呈现的顺序来执行这些操作。
短语“在一些实施例中”被反复使用。该短语一般不指代相同的实施例，然而，它可以指代相同的实施例。术语“包括”、“具有”和“包含”是同义的，除非上下文另有规定。短语“A和/或B”意指(A)、(B)或(A和B)。短语“A/B”意指(A)、(B)或(A和B)，类似于短语“A和/或B”。短语“A、B和C中的至少一个”意指“(A)、(B)、(C)、(A和B)、(A和C)、(B和C)或(A、B和C)”。短语“(A)B”意指“(B)或(A和B)”，也就是说，A是可选的。
尽管本文已经示出和描述了特定实施例，但是本领域普通技术人员将意识到，在不脱离本公开内容的实施例的范围的情况下，可以用各种各样的替代和/或等效的实现来替换所示出和所描述的特定实施例。本申请旨在覆盖本文所讨论的实施例的任何调整和变型。因此，显然意图是本公开内容的实施例仅仅由权利要求书及其等效项来限制。
如本文所使用的，术语“模块”可以指代以下各项、可以是以下各项的部分或者可以包括以下各项：专用集成电路(ASIC)、电子电路、执行一个或多个软件或固件程序的处理器(共享的、专用的或群组)和/或存储器(共享的、专用的或群组)、组合逻辑电路、和/或提供所描述的功能的其它适当的组件。
图1示意性地示出了根据各个实施例的无线通信网络100。无线通信网络100(下文称为“网络100”)可以是诸如演进型通用移动通信系统(UMTS)陆地无线接入网(E-UTRAN)之类的第三代合作伙伴计划(3GPP)长期演进(LTE)的接入网。网络100可以包括：基站(例如，演进型节点B(eNB)104)，其被配置为与用户设备(UE)108无线地通信。网络100还可以包括与eNB 104无线地通信的一个或多个其它UE(例如，UE 112和116)。
UE 108可以包括彼此相耦合的通信模块120和信道资源管理模块124。通信模块120可以通过网络100与eNB 104进行通信(例如，发送和/或接收)。资源管理模块124可以有助于网络的物理资源(例如，资源单元和/或资源块)到物理信道的映射，如下文进一步讨论的。
UE 108可以包括任何适当数量的天线128。在各个实施例中，UE 108可以包括至少与UE 108从eNB 104接收的同时空间层或者流的数量相同的多个天线128，但本公开内容的范围并不受限于该方面。该同时空间层或者流的数量还可以称为传输秩或者简单地说秩。
天线128中的一个或多个天线可以交替地用作发射天线或者接收天线。替代地或者另外地，天线128中的一个或多个天线可以是专用的接收天线或者专用的发射天线。
虽然没有明确地示出，但UE 112和116可以包括与UE 104的模块/组件相似的模块/组件。
eNB 104可以包括至少如所示出的彼此相耦合的通信模块132、控制模块136和映射模块140。通信模块132还可以与eNB 104的一个或多个天线144相耦合。通信模块132可以通过网络100与一个或多个UE(例如，UE108、112和/或116)进行通信(例如，发送和/或接收)。在各个实施例中，eNB 104可以包括至少与向UE 108发送的同时传输流的数量相同的多个天线144，但本公开内容的范围并不受限于该方面。天线144中的一个或多个天线可以交替地用作发射天线或者接收天线。替代地或者另外地，天线144中的一个或多个天线可以是专用的接收天线或者专用的发射天线。
在各个实施例中，天线144可以与eNB 104的多个天线端口相关联。这些天线端口可以向它们各自的传输应用不同的波束成形参数，以便在不同的天线端口的传输之间提供空间分集。例如，这些天线端口可以使用诸如UE特定的参考信号(UE-RS，其还称为解调参考信号(DM-RS))之类的不同参考信号，以便向UE 108和/或其它UE进行传输。
在各个实施例中，控制模块136可以生成增强型物理下行链路控制信道(ePDCCH)，以便向一个或多个UE(例如，UE 108)进行传输。ePDCCH可以包括针对UE 108的下行链路控制信息(DCI)。例如，该DCI可以包括与以下各项相关的信息：针对物理下行链路共享信道(PDSCH)的下行链路资源的调度、针对物理上行链路共享信道(PUSCH)的上行链路资源的调度、和/或针对PUSCH和/或物理上行链路控制信道(PUCCH)的发射功率控制命令。
在各个实施例中，映射模块140可以将该ePDCCH分配到一个物理资源块(PRB)对的一个或多个增强型控制信道单元(eCCE)。可以发送具有聚合水平的ePDCCH，该聚合水平指示使用多少eCCE来发送该ePDCCH。在一些实施例中，该聚合水平可以是1、2、4或8。
各个eCCE可以包括多个增强型资源单元组(eREG)，并且这些eREG可以包括多个资源单元。各个资源单元可以与该PRB对内的频率和时间资源相对应。在一些实施例中，这些eREG可以包括一组连续的资源单元。至于连续性，其意味着在各个eREG中包括的每一个资源单元可以与相同eREG中的至少一个其它资源单元在时间和/或频率上是连续的。在另一个实施例中，这些eREG可以包括一组非连续的资源单元(例如，各个eREG可以包括与该eREG的另一个资源单元不连续的至少一个资源单元)。
PRB对的各个eREG可以与一个索引(例如，1、2、…、n，其中n是该PRB对中的eREG的数量)相关联。例如，图2示出了具有16个eREG的PRB对200，该16个eREG具有从1到16的相应索引。可以在一行共同的频率内以连续的时间间隔对索引进行排序，接着对具有连续频率值的下一行eREG进行排序，如图2中所示出的。其它实施例可以包括PRB对内的eREG的替代排列。
在各个实施例中，映射模块140可以将PRB对200的各个eCCE映射到PRB对200的多个非连续的eREG和/或映射到跨越不同的PRB对中的eREG。也就是说，eCCE可以包括一组eREG，该组eREG具有相关联的不连续的索引编号(例如，在该组的eREG的索引之间具有至少一个不连续)。如果在该组eREG的各个eREG的索引之间存在至少一个不连续，则可以将该组eREG视作为非连续的。举例而言，由eREG1、eREG2、eREG5和eREG6构成的一组eREG被视作为非连续的，因为其不包括eREG3或eREG4。具有非连续的一组eREG的eCCE可以称为分布式eCCE。在一些实施例中，分布式eCCE的eREG也可以是非连续的，但这并非需要的。
图3示出了将PRB对200的eREG映射到四个分布式eCCE 304a-d(eCCE1304a、eCCE2304b、eCCE3304c和eCCE4304d)的映射方案300。每一个eCCE 304a-d包括如所示出的一组四个非连续的eREG。例如，eCCE1 304a包括eREG1、eREG2、eREG5和eREG6，而eCCE2304b包括eREG3、eREG4、eREG7和eREG8。在其它实施例中，分布式eCCE 304a-b可以包括更多或者更少的eREG。
分布式eCCE 304a-d可以与包括一组连续的eREG(例如，eREG 1、eREG 2、eREG 3和eREG 4)的集中式eCCE形成对照。在各个实施例中，eNB 104可以在发送分布式eCCE与发送集中式eCCE之间进行切换。例如，当eNB 104具有子带信道状态信息(CSI)时，eNB 104可以使用集中式eCCE传输，这可以允许eNB 104实现频率调度增益。当eNB 104不具有子带CSI时，eNB 104可以使用分布式eCCE进行传输。分布式eCCE可以提供频率和空间分集，以有助于eNB 104实现块错误率(BLER)目标。
在各个实施例中，映射模块140可以将eREG映射到eNB 104的各个天线端口308a-d来进行传输。天线端口308a-d可以分别对应于天线端口7、天线端口8、天线端口9和天线端口10。天线端口308a-d可以与不同的UE-RS相关联，以便在它们的各自传输之间提供空间分集。
在各个实施例中，映射模块140可以将eREG映射到各自的天线端口308a-d，使得各个天线端口308a-d与连续的一组eREG相关联。例如，eREG 1到eREG 4可以映射到天线端口308a，eREG 5到eREG 8可以映射到天线端口308b，eREG 9-12可以映射到天线端口308c，以及eREG 13-16可以映射到天线端口308d。因此，对于分布式eCCE 304a-d来说，eREG到天线端口映射可以与集中式eCCE相同。因此，ePDCCH可以呈现相同的干扰特征，无论eNB 108是使用集中式传输，还是使用分布式传输。这可以有助于相邻小区成功地阻止干扰。
由于各个eCCE可以包括一组非连续的eREG，因此eCCE包括映射到不同的天线端口的eREG，从而为eCCE的传输提供空间分集。因此，映射方案300可以为分布式eCCE提供空间分集，同时还针对分布式eCCE和集中式eCCE呈现相同的干扰特征。
在各个实施例中，映射模块140可以将ePDCCH的至少一部分映射到eCCE中的一个或多个eCCE，以便向UE 108进行传输。在一些实施例中，可以将ePDCCH分布在多个PRB对(例如，不同频率的PRB对)的eCCE之中。在其它实施例中，可以将ePDCCH全部映射到该PRB对200中。在一些实施例中，映射模块140可以将一个或多个另外的ePDCCH(例如，用于其它UE的ePDCCH)映射到PRB对200的其它eCCE中。
图4示出了用于替代的PRB对402的映射方案400，PRB对402包括四个eCCE 404a-d，四个eCCE 404a-d均具有两个eREG。各个eCCE 404a-d可以包括非连续的eREG(例如，具有非连续索引的eREG)。例如，eCCE 404a可以包括eREG 1和eREG 3，而eCCE 404b可以包括eREG2和eREG 4。
这些eREG可以以连续的组映射到天线端口408a-d。例如，eREG 1和eREG 2可以映射到天线端口408a，而eREG 3和eREG 4可以映射到天线端口408b。因此，eCCE 404a-d可以包括映射到不同天线端口的eREG，而对于集中式eCCE来说，eREG到天线端口映射方案可以呈现相同的干扰特征。
图5示出了根据各个实施例的用于将多个PRB对508a-d映射到多个分布式资源块(DRB)对504a-d的映射方案500。除了本文所描述的映射方案300和/或映射方案400之外，或者独立于本文所描述的映射方案300和/或映射方案400，可以使用DRB对映射方案500。
在各个实施例中，eNB 104的通信模块132可以使用多个PRB对508a-d来与UE 108进行通信。各个PRB对508a-d可以包括如所示出的多个(例如，四个)eCCE。这些eCCE可以是集中式的或分布式的。映射模块140可以将各个PRB对的eCCE映射到多个DRB对。例如，映射模块140可以定义四个DRB对504a-d，其中各个DRB对504a-d包括来自四个PRB对508a-d中的每一个PRB对的eCCE，如图5中所示出的。因此，DRB对504a可以包括来自PRB对508a-d中的每一个PRB对的一个eCCE(例如，eCCE0、eCCE4、eCCE8和eCCE12)。虽然图5示出了映射到四个DRB对504a-d的四个PRB对508a-d，其它实施例可以包括映射到N个DRB对的任意数量(N)个PRB对。
在各个实施例中，映射模块140可以将ePDCCH分配到DRB对504a-d中的一个或多个DRB对，以进行传输。可以以集中式方式将ePDCCH分配到所述一个或多个DRB对(例如，尽可能集中在几个DRB对中)。例如，如果该ePDCCH具有聚合水平1、2或4，则可以将整个ePDCCH分配到一个DRB对(例如，DRB对504a)。如果该ePDCCH具有聚合水平8，则可以将该ePDCCH分配到两个DRB对(例如，DRB对504a和504b)，并且其可以使用这两个DRB对的所有八个eCCE。
在LTE版本11中，要求的是PDSCH可以不与ePDCCH在相同的PRB对中进行发送。该要求简化了UE 108的实现复杂度。例如，eNB 104可以向UE 108发送DCI，该DCI指示包括PDSCH的全部PRB对。UE 108可以不需要围绕该ePDCCH的资源单元进行速率匹配。
但是，对于分布式ePDCCH而言，其可以被分配到多个PRB对的eREG，该要求可能造成带宽浪费，因为包括一个ePDCCH的一部分的PRB对的剩余资源可能没有用于发送PDSCH。DRB对映射方案500提供了分布式ePDCCH的益处(因为每一个DRB对504a-d包括来自多个PRB对508a-d的eCCE)，同时释放其它DRB对504a-d以用于发送PDSCH。
因此，DRB对504a-d中的一个或多个DRB对可以被指定用于控制信道(例如，ePDCCH)传输，而剩余的DRB对504a-d中的一个或多个DRB对可以被指定用于PDSCH传输。例如，映射模块140可以将ePDCCH分配到DRB对504a，并且可以指定DRB对504b-d来用于PDSCH的传输。
在各个实施例中，PRB对508a-d可以在频域上进行区分。另外地或者替代地，eNB104的通信模块132可以应用不同的波束成形属性(例如，不同的DM-RS)，以便发送给定的DRB对的各个eCCE。因此，各个DRB对的eCCE可以具有频率分集和/或空间分集。
在一些实施例中，映射模块140可以将多个ePDCCH分配到DRB对504a-d(例如，用于多个UE的ePDCCH)。例如，DRB对504a可以用于发送聚合水平2的两个ePDCCH、聚合水平2的一个ePDCCH和聚合水平1的一个或两个ePDCCH、或者聚合水平1的多达四个ePDCCH。
在各个实施例中，UE 108(例如，资源管理模块124)可以接收被分配到如本文所描述的一个或多个DRB对504a-d的分布式ePDCCH，并且UE108可以将该ePDCCH识别成分布式，而不是集中式。ePDCCH可以包括DCI，该DCI包括资源块标识符，以便标识在其上发送PDSCH的资源。UE 108可以基于将该ePDCCH识别成分布式，将这些资源块标识符解读为指代DRB对，而不是PRB对。另一方面，如果UE 108接收集中式ePDCCH(例如，在一个或多个PRB中接收ePDCCH)，则UE 108可以将这些资源块标识符解读为与PRB对相对应，而不是与DRB对相对应。其后，UE 108可以基于将该ePDCCH识别成分布式和在DCI中包括的资源块标识符，在另一个DRB对中接收PDSCH。
例如，如图5中所示出的，PRB对508a-d可以分别对应于资源空间的PRB0、PRB3、PRB6和PRB9。DRB对504a-d可以分别对应于DRB0、DRB3、DRB6和DRB9。如果UE 108在DRB0504a中接收分布式ePDCCH，其中DCI指示资源块3、资源块6和资源块9被分配给UE 108以进行PDSCH传输，则UE 108可以将该DCI解读为指示：将在DRB3 504b、DRB6 504c和DRB9 504d上发送PDSCH。但是，如果UE 108在PRB 508a中接收集中式ePDCCH，其中DCI指示资源块3、资源块6和资源块9被分配给UE108以进行PDSCH传输，则UE 108可以将该DCI解读为指示：将在PRB3 508b、PRB6 508c和PRB9 508d上发送PDSCH。因此，映射方案500可以不需要另外的信令来向UE 108通知这些资源块标识符指代DRB对504a-d，而不是指代PRB对508a-d。
在一些实施例中，DRB对504a-d可以只用于针对单个UE(例如，UE108)的秩1传输。这可能是由于UE-RS的限制。但是，UE 108可以仍然在一个或多个PRB对上接收较高的秩传输(例如，多输入多输出(MIMO)传输和/或多用户MIMO(MU-MIMO)传输)。例如，UE可以知道PRB0、PRB3、PRB6和PRB9映射到如图5中所示出的DRB。资源空间中的一个或多个其它PRB(例如，PRB1、PRB2等等)可能没有映射到DRB。如果UE接收DCI，该DCI分配DRB连同其它PRB来进行PDSCH传输，则UE可以将DRB视作为第一层，而不管与这些DRB相关联的UE-RS端口。
举例而言，UE可以在DRB0 504a中接收DCI(例如，DCI格式2C)，该DCI指示：分配该UE使用UE-RS端口7和8来在具有秩2传输的PRB 1、PRB 2、PRB 3、PRB 6和PRB 9上接收PDSCH。在该情况下，UE可以将PRB 3、PRB 6和PRB 9分别解读为指代DRB3 504b、DRB6 504c和DRB9 504d。可以在UE-RS端口7上的PRB1和PRB2上以及在eCCE特定的天线端口上的DRB3、DRB6和DRB9上发送第一PDSCH层。可以使用UE-RS端口8来只在PRB1和PRB2上发送第二PDSCH层。不可以在DRB上发送第二PDSCH层。
图6示出了根据各个实施例的可以由UE(例如，UE 108)执行的方法600。在一些实施例中，该UE可以包括一种或多种计算机可读介质和/或具有对一种或多种计算机可读介质的访问，所述一种或多种计算机可读介质具有存储在其上的指令，当所述指令被执行时，使该UE执行方法600。
在604处，UE可以从eNB(例如，eNB 104)接收分布式ePDCCH。该分布式ePDCCH可以包括DCI，该DCI被分配到第一DRB对(例如，DRB对504a)的一个或多个eCCE。第一DRB对可以包括映射自多个PRB对的eCCE，如本文所描述的。该DCI可以包括资源块标识符，该资源块标识符指示向该UE分配的用于接收PDSCH的资源。
在608处，UE可以将该ePDCCH识别成分布式，而不是集中式。
在612处，基于将该ePDCCH识别成分布式以及在该DCI中包括的资源块标识符，UE可以在第二DRB中接收PDSCH传输。基于将该ePDCCH识别成分布式，UE可以将该资源块标识符解读为与第二DRB相对应。
使用任何适当的硬件和/或软件来如所期望的进行配置，可以将本文所描述的eNB104和/或UE 108实现到系统中。对于一个实施例而言，图7示出了示例性系统700，示例性系统700包括一个或多个处理器704、与处理器704中的至少一个处理器相耦合的系统控制逻辑单元708、与系统控制逻辑单元708相耦合的系统存储器712、与系统控制逻辑单元708相耦合的非易失性存储器(NVM)/存储装置716、与系统控制逻辑单元708相耦合的网络接口720、以及与系统控制逻辑708单元相耦合的输入/输出(I/O)设备732。
处理器704可以包括一个或多个单核或多核处理器。处理器704可以包括通用处理器和专用处理器(例如，图形处理器、应用处理器、基带处理器等等)的任意组合。
针对一个实施例的系统控制逻辑单元708可以包括任何适当的接口控制器，以便向处理器704中的至少一个处理器和/或与系统控制逻辑单元708相通信的任何适当设备或组件提供任何适当的接口。
针对一个实施例的系统控制逻辑单元708可以包括一个或多个存储器控制器，以便向系统存储器712提供接口。例如，系统存储器712可以用于加载和存储例如用于系统700的数据和/或指令。例如，针对一个实施例的系统存储器712可以包括任何适当的易失性存储器(例如，适当的动态随机存取存储器(DRAM))。
例如，NVM/存储装置716可以包括用于存储数据和/或指令的一个或多个有形的、非暂时性计算机可读介质。NVM/存储装置716可以包括例如任何适当的非易失性存储器(例如，闪存)，和/或可以包括例如任何适当的非易失性存储设备(例如，一个或多个硬盘驱动器(HDD)、一个或多个紧致碟(CD)驱动器和/或一个或多个数字多用途光盘(DVD)驱动器)。
NVM/存储装置716可以包括：存储资源，该存储资源在物理上是系统700安装在其上的设备的一部分，或者其可以由该设备来存取，但不必是该设备的一部分。例如，可以经由网络接口720通过网络和/或通过输入/输出(I/O)设备732来存取NVM/存储设备616。
网络接口720可以具有收发机722，以提供用于系统700的无线接口，从而通过一个或多个网络进行通信和/或与任何其它适当的设备进行通信。收发机722可以实现UE 108的通信模块120或eNB 104的通信模块132。在各个实施例中，收发机722可以与系统700的其它组件相集成。例如，收发机722可以包括处理器704中的处理器、系统存储器712中的存储器和NVM/存储装置716中的NVM/存储装置。网络接口720可以包括任何适当的硬件和/或固件。网络接口720可以包括多个天线，以便提供多个输入、多个输出无线接口。例如，针对一个实施例的网络接口720可以包括有线网络适配器、无线网络适配器、电话调制解调器和/或无线调制解调器。
对于一个实施例而言，可以将处理器704中的至少一个处理器与用于系统控制逻辑单元708的一个或多个控制器的逻辑单元封装在一起。对于一个实施例而言，可以将处理器704中的至少一个处理器与用于系统控制逻辑单元708的一个或多个控制器的逻辑单元封装在一起，以形成系统级封装(SiP)。对于一个实施例而言，可以将处理器704中的至少一个处理器与用于系统控制逻辑单元708的一个或多个控制器的逻辑单元集成在同一管芯(die)上。对于一个实施例而言，可以将处理器704中的至少一个处理器与用于系统控制逻辑单元708的一个或多个控制器的逻辑单元集成在同一管芯上，以形成片上系统(SoC)。
在各个实施例中，I/O设备732可以包括：被设计为使得用户能够与系统700进行交互的用户接口、被设计为使得外围组件能够与系统700进行交互的外围组件接口、和/或被设计为确定与系统700相关的环境状况和/或位置信息的传感器。
在各个实施例中，用户接口可以包括但不限于：显示器(例如，液晶显示器、触摸屏显示器等等)、扬声器、麦克风、一个或多个照相机(例如，静态照相机和/或摄像机)、闪光灯(例如，发光二极管闪光灯)和键盘。
在各个实施例中，外围组件接口可以包括但不限于：非易失性存储器端口、通用串行总线(USB)端口、音频插孔和电源接口。
在各个实施例中，传感器可以包括但不限于：陀螺仪传感器、加速计、近程传感器、环境光传感器和定位单元。定位单元还可以是网络接口720的一部分，或者与网络接口720进行交互，以便与定位网络的组成部分(例如，全球定位系统(GPS)卫星)进行通信。
在各个实施例中，系统700可以是移动计算设备，诸如但不限于：膝上型计算设备、平板计算设备、上网本、智能电话等等。在各个实施例中，系统700可以具有更多或者更少的组件、和/或不同的架构。
示例
在一个例子中，提供了一种用于在无线通信网络中映射物理下行链路信道的装置。所述装置包括：通信模块，其被配置为经由多个天线端口在无线通信网络上与用户设备(UE)进行通信；控制模块，其被配置为生成增强型物理下行链路控制信道(ePDCCH)；以及与控制模块和通信模块相耦合的映射模块。所述映射模块被配置为：将包括多个增强型控制信道单元(eCCE)的一个物理资源块(PRB)对中的各个eCCE映射到所述PRB对的多个非连续的增强型资源单元组(eREG)；将所述多个eREG映射到各个天线端口，以便向UE进行传输，其中，各个天线端口与连续的一组eREG相关联；以及将所述ePDCCH的至少一部分分配到所述eCCE中的一个或多个，以便向UE进行传输。
在一些实施例中，所述ePDCCH包括针对UE的下行链路控制信息(DCI)。
在一些实施例中，所述控制模块被配置为：将所述ePDCCH分布到不同频率的多个PRB对的eCCE上。在一些实施例中，所述PRB对包括四个eCCE。在一些实施例中，各个eCCE包括四个eREG。在一些实施例中，所述PRB对包括以连续顺序的eREG 1到eREG 16，并且其中，所述四个eCCE中的第一eCCE包括eREG 1、eREG 2、eREG 5和eREG 6。
在一些实施例中，所述多个天线端口包括第一天线端口、第二天线端口、第三天线端口和第四天线端口，其中，所述ePDCCH是分布式ePDCCH，并且其中，所述eREG到所述天线端口的映射关系对于分布式ePDCCH来说与集中式ePDCCH是相同的。
在一些实施例中，所述多个天线端口包括第一天线端口、第二天线端口、第三天线端口和第四天线端口，并且：eREG 1到eREG 4映射到第一天线端口；eREG 5到eREG 8映射到第二天线端口；eREG 9到eREG 12映射到第三天线端口；以及eREG 13到eREG 16映射到第四天线端口。
在一些实施例中，各个eCCE包括两个eREG。在一些这样的实施例中，所述PRB对包括以连续顺序的eREG 1到eREG 8，并且其中，所述四个eCCE中的第一eCCE包括eREG 1和eREG 3。
在一些实施例中，所述天线端口与不同的解调参考信号(DM-RS)相关联。
在另一个例子中，提供了一种用于在无线通信网络中映射物理下行链路信道的装置。所述装置包括：通信模块，其被配置为使用多个物理资源块(PRB)对来在无线通信网络上与用户设备(UE)进行通信，各个PRB对包括多个增强型控制信道单元(eCCE)；控制模块，其被配置为提供增强型物理下行链路控制信道(ePDCCH)；以及映射模块。所述映射模块被配置为：将所述eCCE映射到多个分布式资源块(DRB)对，以便在所述多个DRB对之中分布各个PRB对的eCCE；以及将所述ePDCCH分配到所述多个DRB对中的第一DRB对，以便向所述UE中的一个或多个进行传输。
在一些实施例中，所述PRB对是在频域中进行区分的。在一些实施例中，所述第一DRB对被指定用于ePDCCH传输。在一些实施例中，所述多个DRB对中的第二DRB对的所述eCCE被指定用于物理下行链路共享信道(PDSCH)的传输。
在一些实施例中，候选ePDCCH具有聚合水平1、2或4，并且将所述整个ePDCCH分配到第一DRB对，或者所述候选ePDCCH具有聚合水平8，并且将所述ePDCCH分配到包括第一DRB对的两个DRB对。
在一些实施例中，四个PRB对映射到四个DRB对，每一个DRB对包括来自所述PRB对中的每一个PRB对的eCCE。在一些实施例中，所述ePDCCH是第一ePDCCH，并且所述映射模块还被配置为将第二ePDCCH映射到第一DRB对。
在一些实施例中，所述eCCE是集中式eCCE。
在一些实施例中，所述通信模块被配置为使用不同的波束成形属性来发送第一DRB中的所述各个eCCE。在一些实施例中，所述ePDCCH包括下行链路控制信息(DCI)，以便向UE通知用于发送物理下行链路共享信道(PDSCH)的DRB。
另一个例子提供了一种由UE使用以接收下行链路物理信道的方法。所述方法包括：从e Node B(eNB)接收分布式增强型物理下行链路控制信道(ePDCCH)，所述分布式ePDCCH包括下行链路控制信息(DCI)，所述DCI被分配到向第一分布式资源块(DRB)对的一个或多个增强型控制信道单元(eCCE)，其中，第一DRB对包括映射自多个物理资源块(PRB)对的eCCE；将所述ePDCCH识别成分布式，而不是集中式；以及基于所述识别和在所述DCI中包括的资源块标识符，接收第二DRB对中的物理下行链路共享信道(PDSCH)传输。
在一些实施例中，第一DRB对被指定用于ePDCCH传输，并且第二DRB对被指定用于PDSCH传输，
在一些实施例中，所述PRB对在频域中进行区分。
在一些实施例中，四个PRB对映射到四个DRB对，各个PRB对的所述eCCE均匀地分布在所述DRB对上。
在一些实施例中，第一DRB对和第二DRB对包括与同一个PRB对相关联的eCCE。
在一些实施例中，所述ePDCCH具有聚合水平1、2或4，并且所述ePDCCH全部地包含在第一DRB对内。
在一些实施例中，所述PDCCH具有聚合水平8，并且所述PDCCH包含在两个DRB对内。
另一个例子提供了具有存储在其上的指令的一个或多个非暂时性计算机可读介质，当所述指令被执行时，使计算系统执行上面所描述的示例性方法。
另一个例子提供了一种由UE使用的装置，所述装置包括：用于执行上面所描述的示例性方法的各种操作的单元。
虽然为了说明目的，本文已示出和描述了某些实施例，但在不脱离本公开内容的范围的情况下，经计算为用于实现相同目的的多种多样的替代实施例和/或等效实施例或者实现可以替代所示出和描述的实施例。本申请旨在覆盖本文所讨论的实施例的任何调整或者变型。因此，显然意图是本文所描述的实施例仅仅由权利要求书及其等效项来限制。

Claims (7)

1.一种用于在无线通信网络中映射物理下行链路信道的方法，包括：
生成增强型物理下行链路控制信道(ePDCCH)；
将包括多个增强型控制信道单元(eCCE)的物理资源块(PRB)对中的所述多个eCCE映射到所述PRB对的多个增强型资源单元组(eREG)，其中，各个eCCE包括多个eREG；
将所述多个eREG映射到多个天线端口的各个天线端口，以便向用户设备(UE)进行传输，其中，各个天线端口与一组连续的eREG相关联；以及
将所述ePDCCH的至少一部分分配到所述eCCE中的一个或多个，以便向所述UE进行传输，
其中，如果子带信道状态信息(CSI)能够使用则所述多个eREG是连续的，以实现频率调度增益；
其中，如果子带CSI不能够使用则所述多个eREG是非连续的，以实现频率分集；并且
其中，所述eREG到所述天线端口的映射关系对于所述多个eREG是连续的eREG和对于所述多个eREG包括非连续的eREG是相同的。
2.根据权利要求1所述的方法，其中，还包括将所述ePDCCH分布到不同频率的多个PRB对的eCCE上。
3.根据权利要求1所述的方法，其中，所述PRB对包括四个eCCE。
4.根据权利要求3所述的方法，其中，各个eCCE包括四个eREG。
5.根据权利要求4所述的方法，其中，所述PRB对包括以连续顺序的eREG 1到eREG 16，并且其中，所述四个eCCE中的第一eCCE包括eREG1、eREG 2、eREG 5和eREG 6，其中，eREG编号与逐频率和逐时间间隔地对所述PRB对的eREG进行排序和做标注相对应。
6.根据权利要求1所述的方法，其中，所述多个天线端口包括第一天线端口、第二天线端口、第三天线端口和第四天线端口。
7.根据权利要求6所述的方法，其中，
eREG 1到eREG 4映射到所述第一天线端口；
eREG 5到eREG 8映射到所述第二天线端口；
eREG 9到eREG 12映射到所述第三天线端口；以及
eREG 13到eREG 16映射到所述第四天线端口。
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