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CN106899382A - 用于LTE TDD eIMTA系统中的灵活子帧的非周期CSI报告触发的方法 - Google Patents

用于LTE TDD eIMTA系统中的灵活子帧的非周期CSI报告触发的方法 Download PDF

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CN106899382A
CN106899382A CN201610856061.7A CN201610856061A CN106899382A CN 106899382 A CN106899382 A CN 106899382A CN 201610856061 A CN201610856061 A CN 201610856061A CN 106899382 A CN106899382 A CN 106899382A
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csi
subframe
aperiodic
value
triggered
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CN106899382B (zh
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阿列克谢·胡尔耶夫
韩承希
崔基烷
符仲凯
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Apple Inc
Intel Corp
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Intel IP Corp
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Abstract

本公开涉及用于LTE TDD eIMTA系统中的灵活子帧的非周期CSI报告触发的方法。提出了一种在具有动态上行链路‑下行链路配置的LTE TDD系统中触发CSI报告的方法。当上行链路子帧能够在任意子帧上被发送，该方法还定义了如何指示哪个测量子帧集将被用于报告非周期CSI报告。该方法可用于同构网络和采用加强干扰管理和流量适应(eIMTA)的网络。

Description

用于LTE TDD eIMTA系统中的灵活子帧的非周期CSI报告触发 的方法
本申请是申请日为2014年09月25日、题为“用于针对具有动态UL-DL的LTE TDDeIMTA系统中的灵活子帧的非周期CSI报告触发的方法”的中国发明专利申请No.201480047362.4(PCT国际申请PCT/US2014/057440)的分案申请。
相关申请的交叉引用
本申请要求于2013年9月26日向美国专利商标局递交的美国临时专利申请NO.61/883,127的权益。
技术领域
本申请涉及异构网络、加强干扰管理和流量适应(eIMTA)、以及非周期CSI报告。
背景技术
无线移动通信技术使用各种标准和协议来在节点(例如，传输站或收发器节点)和无线设备(例如，移动设备)之间传输数据。一些无线设备在下行链路(DL)传输中使用正交频分多址(OFDMA)并且在上行链路(UL)传输中使用单载波频分多址(SC-FDMA)来进行通信。使用正交频分多址(OFDMA)来进行信号传输的标准和协议包括第三代合作伙伴计划(3GPP)长期演进(LTE)、电气和电子工程师协会(IEEE)802.16标准(例如，802.16e、802.16m)(对行业群体而言通常称作WiMAX(微波接入全球互通))、以及IEEE 802.1 1标准(对行业群体而言通常称作WiFi)。
在3GPP无线接入网络(RAN)LTE系统中，节点能够是演进型能够陆地无线接入网络(E-UTRAN)NodeB(通常也表示为加强NodeB、演进型NodeB、eNodeB、或eNB)和无线网络控制器(RNC)的组合。这些eNB与被称作用户设备(UE)的无线设备通信。DL传输能够是从节点(例如，eNB)到无线设备(例如，UE)的传输，UL传输能够是从无线设备到节点的传输。
在同构网络中，节点(也称作宏节点)能够向小区中的无线设备提供基板的无线覆盖。小区能够是在其内部无线设备可操作来与宏节点通信的物理范围或区域。由于增加的使用量和无线设备的功能，所以异构网络(HetNet)能够被用来处理增加的流量负载。HetNet能够包括覆盖有较低功率节点(小eNB、微eNB、微微eNB、毫微微eNB、或家庭eNB(HeNB))层的高功率宏节点(或宏eNB)层，较低功率节点能够以未精心策划或甚至完全未经协调的方式被覆盖在宏节点的覆盖区域(小区)内。较低功率节点(LPN)一般能够被称作“低功率节点”、小节点、或小小区。
宏节点能够被用于基本覆盖。低功率节点能够被用于填充覆盖孔洞，以提升热区或宏节点的覆盖区域之间的边界处的容量，并且改善建筑结构阻碍信号传输的地方的室内覆盖。小区间干扰协调(ICIC)或加强ICIC(eICIC)可以被用于资源协调以减低HetNet中的节点(比如，宏节点和低功率节点)之间的干扰。
HetNet能够使用时分双工(TDD)或频分双工(FDD)来进行下行链路或上行链路传输。TDD是采用时分复用(TDM)来分离下行链路信号和上行链路信号的应用。在TDD中，DL和UL信号可以使用相同载波频率来运载，其中DL信号使用与UL信号不同的时间间隔。因此，DL信号和UL信号彼此不产生干扰。TDM是一种类型的数字复用，其中两个或更多个位流或信号(比如，DL或UL信号)看起来同时作为一个通信信道中的子信道进行传送，但是物理上是在不同时间资源上传输的。在FDD中，UL传输和DL传输能够使用不同频率再来进行操作。在FDD中，因为DL信号使用与UL信号不同的频率载波，所以可以避免干扰。
时分双工(TDD)提供灵活的部署而不要求频谱资源对。长期演进(LTE)TDD通过提供七个不同半静态配置的UL-DL帧配置允许非对称上行链路-下行链路(UL-DL)分配，下面更详细地描述。这些预定义的LTE帧配置可以包括灵活子帧，其中最初为上行链路传输定义的子帧中的一些可以被改变为下行链路子帧。
加强干扰抑制和流量适应(eIMTA)(也称作“动态TDD”)向LTE TDD系统提供了这样的加强以用于更有效的DL-UL流量管理。在eIMTA下，eNB能够使用无线帧的上行链路子帧中的一个来传输下行链路数据。因此，上行链路和下行链路分配之间的无限帧平衡能够被动态改变以满足瞬时流量状况。通过允许基于小小区中的瞬时流量状况的TDD UL-DL重新配置以及通过考虑(一个或多个)干扰抑制方案能够获得显著的性能益处。
信道状况由于UE操作在无线邻域中而改变。这可能是由于UE的移动、在UE的视线中存在建筑物或车辆、以及其他状况，比如，来自相邻站的干扰等。信道状态信息(CSI)是关于信道状况的数据并且由UE在无线通信期间提供给eNB。CSI可以包括信道质量信息(CQI)、预编码矩阵指示、等级指示、以及关于无线信道的其他信息。
在LTE中定义了两种CSI报告模式：非周期和周期。当eNB做出请求并且UE在PUSCH信道中供应CSI报告时发生非周期CSI报告。对两种CSI报告模式的支持对于评估常规子帧和灵活子帧中的不同干扰环境是可取的。
针对非周期模式，根据旧有系统行为，为了触发针对灵活子帧的CSI报告，eNB需要以灵活子帧中的一个子帧上的非周期报告触发来发送UL授权。然而，由于eIMTA专门HARQ操作行为并且还考虑到与载波聚合(CA)的结合操作、经协调的多点传输(CoMP)、或这些的组合，可能不总是可以在灵活子帧上发送UL授权，并且需要定义用于非周期CSI触发的新方法。
因此，存在对于克服现有技术的缺点的方法的持续需求。
附图说明
当通过连同附图参考下面的具体实施方式时本文档的上述各方面和很多伴随的优势将变得更容易认知同时变得更好理解，其中，除非另有规定，在全部各个视图中相似的标号指代相似的部分。
图1是根据一些实施例的包括服务于多个用户设备的宏小区和微微小区的异构网络的简化图示；
图2是根据一些实施例的旧有LTE TDD半静态配置的上行链路-下行链路子帧配置的图示；
图3是根据一些实施例的示出了CSI参考信号及其到CSI触发的关系的简化图示；
图4A和4B是根据一些实施例的示出了对旧有TDD LTE系统而言非周期报告如何发生的简化图示；
图5是根据一些实施例的在TDD异构网络中触发非周期CSI报告的方法的简化框图；
图6是根据一些实施例的示出了如何重定义CSI测量子帧集以触发针对常规子帧和灵活子帧两者的非周期CSI报告的简化图示；
图7A-7B根据一些实施例示出了分别针对常规子帧和灵活子帧的图6的第一解决方案；
图8是根据一些实施例的示出了图5的触发非周期CSI报告的方法的第一解决方案所采取的步骤的流程图；
图9A和9B是根据一些实施例的示出了图5的触发非周期CSI报告的方法的第二解决方案的简化图示；以及
图10A和10B是根据一些实施例的示出了图5的触发非周期CSI报告的方法的第三解决方案的简化图示。
具体实施方式
根据本文描述的实施例，提出了针对灵活子帧触发非周期CSI报告的方法。当上行链路授权能够在任意子帧上被发送时，该方法还定义了如何指示哪个测得子帧集将被用于报告该非周期CSI。
在下面的详细描述中，参照了附图，附图通过举例说明示出了本文描述的主题可以在其中被实践的具体实施例。然而，将会理解的是在阅读本公开后其它实施例对本领域的普通技术人员来说将是明显的。因此，下面的详细描述不应当被解释为限制性意义，主题的范围由权利要求限定。
图1示出了异构网络(HetNet)100，包括在宏小区40中的宏节点30(例如，宏演进型节点B(eNB))、以及分别在小小区42、44、46和48中的多个低功率节点(LPN)32、34、36和38。如本文所使用的，小区能够指代节点或节点的覆盖区域。低功率节点(LPN)能够指代小节点，小节点能够包括小eNB、微eNB、微微节点、微微eNB、毫微微eNB、家庭eNB(HeNB)、远程射频头(RRH)、远程无线电设备(RRE)、或远程无线电单元(RRU)。如本文所使用的，术语“小节点”可以被与术语“微微节点”(或微微eNB)交替使用，并且在这些示例中术语“小小区”可以被与术语“微微小区”交替使用，以辅助在宏节点和LPN或小节点之间、并且在宏小区和小小区之间进行区分。宏节点能够经由回程链路(未示出)(比如，通过使用X2接口或光纤连接)被连接到每个LPN。
HetNet能够包括宏节点30，宏节点30通常能够以相对高的功率等级(例如，大约5瓦(W)到40W)进行传输，以覆盖宏小区40。HetNet能够被覆盖有LPN 32、34、36和38，这些LPN可以以大幅降低的功率等级(例如，大约100毫瓦(mW)到40W)进行传输。在示例中，宏节点的可用传输功率可以至少10倍于低功率节点的可用传输功率。LPN能够被用于热点或热区中，热点或热区指代具有高无线流量负载或高容量活动传输无线设备(例如，UE)的区域。LPN能够被用于微小区、微微小区、和/或家庭网络中。
在图1的示例中，无线设备(例如，UE 50A-E、52、54A-B、56A-B和58)能够由宏节点30或者由LPN 32、34、36和38之一来服务。无线设备能够与网络中的小区(例如，节点)相关地进行描述。例如，图1的HetNet 100包括宏小区40和四个小小区42、44、46和48。主要由宏小区覆盖区域40中的宏节点30来服务的无线设备能够被称作宏UE(MUE)50A-E。主要由小小区覆盖区域42、44、46和48中的小节点32、34、36和38(例如，LPN或微微节点)来服务的无线设备能够被称作微微UE (PUE)52、54A-B、56A-B和58。
HetNet部署已经被认为与传统同构网络相比提供了增大蜂窝覆盖和容量的有效方式。HetNet可以包括不同无线接入技术、发射-接收技术、和基站(eNB)传输功率、以及其他可能的架构组合的共存。针对时分双工(TDD)系统和网络，允许基于不同小区中的流量状况的适应上行链路-下行链路(UL-DL)子帧配置能够显著提升系统性能。旧有LTE TDD能够通过提供7个不同的半静态配置的UL-DL子帧配置来支持非对称UL-DL分配。
如图2中所绘，旧有LTE TDD无线帧60包括七个UL-DL配置(在Y轴上被标号为0-6)，每个帧具有十个子帧(在X轴上被标号为0-9)，这些子帧被分配以执行上行链路传输或下行链路传输中的任一者(第三特殊子帧被分配作为保护时间)。子帧被标注为使得“D”表示下行链路(DL)子帧，“S”表示特殊子帧，并且“U”表示上行链路(UL)子帧。相对于传输方向，特殊子帧能够类似于下行链路子帧地操作。
UL-DL被称作半静态是因为这些配置不经常变化。配置可以由于更多UE进入无线邻域、UE的运动、以及其他因素(比如，长期平均流量统计)而改变。
UL-DL配置0能够在子帧2、3、4、7、8和9中包括六个上行链路子帧，并且在子帧0、1、5和6包括四个下行链路子帧或特殊子帧。UL-DL配置5能够在子帧2中包括一个上行链路子帧并且在子帧0、1、3、4、5、6、7、8和9中包括九个下行链路子帧或特殊子帧。UL-DL配置0能够被看作上行链路有利型(或着重(heavy))UL-DL配置，UL-DL配置5能够被看作下行链路有利型(或着重)UL-DL配置。
因此，针对七个可用LTE TDD帧60，第一个(0)和最后一个(6)子帧是UL着重，第二个子帧(1)是对称的，并且其余四个子帧(2、3、4和5)是DL着重。现有的一组旧有TDD UL-DL配置能够在40％(例如，UL-DL配置0)到90％(例如，UL-DL配置5)之间的范围内提供DL子帧分配。
在旧有LTE下定义的半静态分配可以匹配或可以不匹配瞬时流量状况。高级UL-DL配置允许子帧3、4、7、8和9(被称作灵活子帧(并且在图2中用红色框出))将它们的配置从预定义的旧有LTE指定进行改变。
在示例中，网络的小区(例如，宏小区和小小区)能够同步地改变UL-DL配置，以避免与其他小区的干扰。然而，这种要求会限制网络的不同小区中的流量管理能力。
对旧有LTE而言，无线帧内的UL和DL子帧分配能够通过系统信息广播(SIB)信令被重新配置。因此，在示例中，可以预期曾经配置的UL-DL分配半静态地变化。预定或半静态配置的UL-DL配置可能不匹配瞬时流量状况，导致低效的资源利用，特别是在具有下载或上传大量数据的少量用户(例如，UE)的小区中。
适应UL-DL配置能够被用来处理依赖于小区的流量不对称并且匹配瞬时流量状况。针对在不同小区中具有不同UL-DL配置的这种TDD LTE部署，能够产生新类型的干扰，包括BS-对-BS and UE-对-UE干扰。会损害网络的功能的干扰类型可以是小区间DL-UL(BS-对-BS)干扰，该干扰可以显著降低从不同小区中的DL-UL配置的适应能力获得的益处。
宏小区(在同构网络中)之间的或者宏小区和小小区(在HetNet中)之间的BS-对-BS(DL-UL)干扰的强度能够进行难于实现的UL-DL配置的动态适应。在示例中为解决对于BS-对-BS干扰的问题，LTE TDD网络能够使宏小区的每个子帧的传输方向与其他小区的子帧的传输方向对齐，从而小区彼此同步地工作，有效地避免了DL-UL小区间干扰。
UL-DL配置的改变可能在灵活和常规/静态子帧中造成不同干扰环境，这些干扰环境可能要求对链路适应和信道状态信息(CSI)报告机制的调整以进一步优化LTE-TDD性能。
再次参考图2，在具有动态UL-DL配置调整(例如，灵活子帧)的LTE TDD系统中，子帧可以根据改变传输方向的可能性进行分类：
·常规DL子帧(子帧0、1、5、6)；
·常规UL子帧(子帧2)；
·能够被配置为DL或UL中的任一者的灵活子帧(子帧3、4、7、8、9)
在HetNet中，灵活和常规DL子帧可以具有不同干扰环境，因为在DL-灵活子帧中进行发送的一组活动站可以是不同的。例如，一些eNB可以使用灵活子帧来进行下行链路传输，而另一邻近eNB使用同一子帧来进行上行链路传输。通常，相邻小区中的UL传输增大了灵活子帧处的信号与干扰加噪声比(SINR)，因为UE以较低功率等级进行发送并且UE-对-UE传播经受更高的衰减。因此，在常规子帧处估计的CQI相对于在灵活子帧处估计的CQI能够看起来是悲观的，并且评估该CQI差值并且识别何时多个CSI测量能够是有益的场景是有意思的。在常规子帧和灵活子帧处观察到的DL CQI差值可以取决于DL-UL干扰抑制和流量适应方案。
CSI测量子帧集
高达两个无线资源控制(RRC)配置的子帧集(本文称作CSI测量子帧集或CSI测量子帧)能够是UE专门信令的(每服务小区)以允许分开的CSI测量/报告。在LTE规范中已经支持资源受限的CSI测量的机制。RRC信令能够为UE配置具有被准许重叠的两个独立的CSI测量子帧集(CCSI，0和CCSI，1)的CSI测量子帧模式。该机制允许eNB比较针对不同组的子帧的UE的CSI报告。
在对LTE-TDD eIMTA的应用中，现有CSI测量子帧集和信令能够被重新使用，以使得子帧集中的一个(CCSI，0)以常规DL子帧上的CSI测量为目标，并且第二子帧集(CCSI，1)为传输方向能够从UL改变到DL的灵活子帧上的测量服务。
针对eIMTA系统，对非周期和周期CSI报告两者的支持对于评估两种子帧测量集上的干扰环境是可取的。
CSI报告触发
根据3GPP规范36.213，LTE；演进型通用陆地无线接入(E-UTRA)物理层过程(第11.7.0版第11次发行)：如果相应的CSI请求字段被设定为触发报告并且未被保留，当在子帧n中针对服务小区c解码以下两项中的任一项后，UE将在服务小区c上的子帧n+k中使用PUSCH执行非周期CSI报告：
·上行链路DCI格式，或
·随机接入响应授权。
在3GPP LTE中，非周期CSI报告采用触发机制来告诉UE何时向eNB报告CSI。一种触发机制是下行链路控制信号(DCI)格式0中的位-UL授权，UL授权提供用于后续UL传输的资源分配信息，在本文中被称作上行链路授权。eNB将触发传输到UE，之后UE将测得的CSI传输到eNB。测得的CSI是在物理上行链路共享信道(PUSCH)内部的上行链路反馈信道上传输的。CSI测量包括以下各项中的一项或多项：针对每个下行链路分量载波(CC)的等级指示符(RI)、信道质量指示符(CQI)、预编码矩阵指示符(PMI)。
CSI参考信号
对下行链路参考符号(RS)、小区专用参考符号(CRS)或CSI参考符号(CSI-RS)中的任一者执行UE测量。CSI-RS、CSI参考资源针对CSI测量。并非每个下行链路子帧都包含CSI-RS。
针对CSI报告，LTE规范中明确定义了CSI参考资源。在时域中，CSI参考资源被定义如下。针对在具有针对服务小区配置的单一CSI处理的传输模式10或传输模式1-9中配置的UE，CSI参考资源由单一下行链路子帧(n-nCQI_ref)来定义，
其中，针对周期CSI报告，nCQI_ref是大于或等于四的最小值，从而它对应于有效最小子帧
其中，针对非周期CSI报告，nCQI_ref使得CSI-RS在与上行链路DCI格式中的相应CSI请求在相同有效下行链路子帧中
非周期CSI报告是由下行链路控制信息(DCI格式0)触发的，其中CQI请求字段被设定为1。这根据一些实施例在图3中示出。多个CSI-RS 70被周期性地部署在子帧150中。CSI触发72符合DL子帧中的一个DL子帧，UL授权74在该DL子帧中被传输。此外，具有CSI-RS 70的子帧之后的PUSCH子帧76包含CSI报告，并且至少是来自参考资源的nCQI_ref78。
旧有LTE系统中的非周期CSI报告
图4A和4B示出了旧有LTE系统中如何发生非周期CSI报告。eNB配置两个独立且正交的CSI测量子帧集，CCSI，A和CCSI，B。在3GPP规范中，这些测量子帧集被称作CCSI，0和CCSI，1，但被给以不同名称以与在方法200中所使用的测量子帧集相区分，如下所述。位图中为“1”的位指示哪个子帧是该测量子帧集的一部分，并且这两个子帧是互斥的。因此，如果子帧属于特定测量子帧集，则同一子帧不能属于另一测量子帧集。UE将根据来自eNB的指令独立地针对子帧集执行CSI测量。
指令呈现为上行链路授权的形式。一旦eNB在下行链路子帧上发送上行链路授权，UE将指导将针对哪个测量子帧集执行CSI测量。如果上行链路授权在属于CSI子帧集A的下行链路子帧上被发送，则意味着eNB请求对测量子帧集A(CCSI，A)中的子帧执行CSI测量。如果上行链路授权在属于CSI子帧集B的下行链路子帧上被发送，则意味着eNB请求对测量子帧集B(CCSI，B)中的子帧执行CSI测量。
这在图4A和4B中示出。在此示例中，预定义的UL-DL子帧配置0被使用(图2)，但是该原理适用于任何UL-DL配置。CSI测量子帧集CCSI，A和CCSI，B被指示。构成由eNB创建的CSI子帧集的特定子帧可能看起来不同于图4A和4B中所描绘的那样，但是已知构成针对一个CSI子帧集的位图的子帧与针对另一子帧集的子帧互斥。
UL授权由eNB仅在DL子帧上发送。在图4A中，UL授权在DL子帧0或特殊子帧6中的任一者上发生(为了这些目的，被分类为DL子帧)、或者子帧0和子帧6上发生。通常每个子帧可以具有对给定UE的一个UL授权。在UL-DL配置0的情形下可能存在例外，因为DL子帧的数目小于UL子帧的数目。因为这些子帧属于CSI测量子帧集CCSI，A，所以UE隐式地知道使用CSI测量子帧集CCSI，A将CSI报告发送到eNB。换言之，CSI报告将基于子帧0和6。
在图4B中，UL授权发生在特殊子帧1或DL子帧5中的任一者上。因为这些子帧属于CSI测量子帧集CCSI，B，所以UE隐式地知道使用CSI测量子帧集CCSI，B将CSI报告发送到eNB。换言之，CSI报告将基于子帧1和5。
CSI资源被链接到DL子帧测量子集。DCI UL授权(其触发非周期CSI报告)在来自不同子帧测量集的DL子帧上被发送，并因此被用于触发针对不同子帧测量既的非周期报告。
在eIMTA系统的情形下，来自不同子帧测量集的DL子帧可以被用于触发针对不同子帧测量集的非周期报告。具体地，为了触发针对灵活子帧的CSI报告，具有非周期报告触发的UL授权可以在灵活子帧中的一个上被发送。
这可能与无线接入网络第1层工作组(RAN1 WG)协议矛盾，这些协议断言以下：
·DL HARQ时间线-使用DL有利型UL-DL配置2或5(参见图2)；以及
·UL HARQ时间线-使用来自系统信息块的位一(SIB1)或无线资源控制(RRC)配置的UL-DL配置
根据和这些协议，关于灵活子帧的下行链路控制信息(DCI)不能被用于调度UL授权。因此，针对灵活子帧的非周期CSI报告不能被触发，如图4A和4B中所示。
触发非周期CSI报告的方法
当eNB做出请求并且UE提供CSI报告时，发生非周期CSI报告。
针对非周期CSI报告，具有非周期报告触发的UL授权应当在灵活子帧中的一个上被发送以触发针对该灵活子帧的CSI报告。在一些情形下，UL授权能够在任意子帧上被发送。在其他情形下，为了使UL混合自动重复请求(HARQ)时间线保持在动态TDD UL-DL重新配置下并且简化支持eIMTA的系统中的HARQ操作，可能无法在灵活子帧上发送UL授权。即使在CSI报告能够在任意子帧上被发送的情形下，也需要定义哪个测量子帧集将被用于非周期CSI报告。
因此，图5根据一些实施例一般地示出了触发针对灵活子帧的非周期CSI报告的方法200。方法200解决了两种情况。在第一情形220下，针对不同子帧测量集被隐式地触发的非周期CSI报告被定义以支持其中UL授权不能在灵活子帧上被发送的情形(HARQ定时约束)。在第二种更一般的情形230中，CSI报告触发被明确地定义。该方法可以不依赖于DL子帧，其中具有非周期CSI触发的UL授权被发送。
情形1：针对两个测量集的非周期CSI报告(HARQ定时约束)
在第一情形220下，由于UL HARQ定时约束；UL授权不能在灵活子帧上被发送。本文提出了两种解决方案222和224。
解决方案1(222)
在一些实施例中，第一解决方案222采用针对两个测量子帧集定义的两个位图：
·针对常规子帧的CCSI，0；和
·针对灵活子帧的CCSI，1
在一些实施例中，位图或者是新定义的或者重复使用针对CCSI，0和CCSI，1的两个测量子帧集的现有位图模式。在旧有系统中，CCSI，A和CCSI，B不重叠并未彼此互斥，如图4A和4B中所示。相反，在解决方案222中，在一些实施例中，两个位图可以重叠。这使得逻辑与(AND)操作指示UL授权针对哪个测量子帧集触发该非周期CSI报告。在一些实施例中，如果UL授权在指示针对灵活子帧触发非周期CSI报告的常规DL子帧上被发送，则非周期CSI报告能够针对灵活子帧被触发，如新定义的
虽然如此，eNB需要能够向UE指示
将针对哪个测量子帧集生成CSI报告。不同于在将针对其做出CSI报告的子帧上发送上行链路授权，解决方案222涉及另外的指示符，因为上行链路授权不能在灵活子帧上被发送。
图6提供了对在第一解决方案222下如何定义CCSI，0和CCSI，1的位图的说明。这些位图被用于生成新的位图CCSI，R和CCSI，F，它们分别指定针对常规子帧和灵活子帧的CSI子帧测量集。对CCSI，0和CCSI，1的解释如下：
·CCSI，0：位图中任意被设定为“1”的位X指示哪个常规DL子帧用于CCSI，R(X位可被认为是CCSI，0的常规子帧位)。
因此，在与灵活子帧相对应的位中仅示出了“0”位。
·在CCSI，1中，存在三种类型的位，被标记为W、Y和Z。
·常规DL子帧处的Y位指示对这些子帧的UL授权是否触发针对灵活子帧的常规子帧的CSI报告
·0→针对常规子帧触发的非周期CSI报告
·0→针对灵活子帧触发的非周期CSI报告
·Z位指示那些子帧构成CCSI，F。(Z位可被认为是CCSI，1的灵活子帧位。)
·W位是无关位并且可被默认地设定为0
W位是无关位的原因在于：对七个可用LTE帧配置(图2)中的每个而言，子帧2仅包含UL子帧。因此，在该子帧中未能发出UL授权，，CCSI，1的该特定位将因此不必被解释。
查看图6的另一方式是看如果逻辑操作AND(X，Y)的结果＝1，则携带UL授权的常规DL子帧被用于触发针对CCSI，F的非周期CSI报告，否则针对CCSI，R的非周期报告被触发。
图7A和7B根据一些实施例提供了第一解决方案222如何操作的两个示例。为便于理解，这些图还包括步骤指示符1、2、3和4。在图7A中，上行链路授权在子帧1或子帧5中的任一者上被发送(步骤1)。如上面所定义的，因为CCSI，1中的子帧0和5被设定为“0”，这意味着将发生针对常规子帧的非周期CSI报告(步骤2)。CCSI，0中的任意被设定为“1”的位指示哪个常规DL子帧用于针对常规子帧的CSI测量集CCSI，R(步骤3)(如果步骤2中的位已经为“1”，则CCSI，1的Z位已经被解释而不是CCSI，0的X位。)因为为0、1、5和6被设定为“1”，这意味着常规子帧0、1、5和6将被用于CSI测量。非周期CSI报告将使用CCSI，R发生(步骤4)。
在图7B中，上行链路授权被发送到常规DL/特殊子帧1或常规DL/特殊子帧6(步骤1)。现在，因为CCSI，1中的子帧1和6被设定为“1”，如所指示的其中在CCSI，1中Y＝1，这被解释为表示CSI报告针对灵活子帧被请求(步骤2)。CCSI，1中的任何被设定为“1”的Z位指示那些灵活子帧用于CSI测量集CCSI，F(步骤3)。因为位3、7和9被设定为“1”，这意味着灵活子帧3、7和9将被用于CSI测量集CCSI，F。(如果步骤2中的位已经为“0”，则CCSI，0的X位已经被解释而不是CCSI，1的Z位。)非周期CSI报告将使用CSI测量集CCSI，F发生(步骤4)。
图8是根据一些实施例示出如何分析两个CSI测量位图CCSI，0和CCSI，1以产生用于使用第一解决方案222执行非周期CSI报告的新的CSI测量集CCSI，R和CCSI，F。UL授权由eNB在由UE标识的一个或多个DL子帧上发出(框222a)。CCSI，1中的(一个或多个)相应的Y位被获得(框222b)。如果相应的Y位为“0”(框222c的“是”分支)，则CSI测量集CCSI，R根据CCSI，0的X位被定义(框222d)并且非周期CSI测量在CCSI，R中所标识的子帧上发生(框222e)。
不然，CCSI，1的相应的Y位为“1”(框222c的“否”分支)。CSI测量集CCSI，F根据CCSI，1的Z位被定义(框222f)并且非周期CSI测量在CCSI，F中所标识的子帧上发生(框222g)。
解决方案2(224)
返回图5，在一些实施例中，方法200包括第二隐式触发解决方案224。这里，非周期CSI是由UL授权触发的，该UL授权在常规子帧或灵活子帧中的任一者上调度PUSCH传输。UL和灵活子帧能够分别与CSI测量子帧集0和1和/或针对CSI测量子帧集0和1的触发的非周期CSI报告相关联/链接。在对LTE TDD eIMTA的应用中，根据实施例之一，只要UL授权在灵活子帧上调度，则UL授权能够在任意常规DL子帧上被发送以触发针对灵活子帧的非周期CSI报告。
图9A和9B中根据一些实施例示出了第二解决方案224。解决方案224中的想法是使上行链路子帧与对应于不同CSI子帧测量集的CSI报告相关联。因此，在一些实施例中，如果eNB调度以在灵活子帧上传输，则针对CCSI，1或(CCSI，0)的CSI报告被生成。如果，替代地，如果eNB调度以在常规上行链路子帧上传输，则针对CCSI，0或(CCSI，1)的CSI报告被生成。
在一些实施例中，第二隐式触发解决方案224采用DCI格式0中的一位CSI字段来请求非周期报告。这将使能使用第一测量子帧集(CCSI，0)或第二测量子帧集(CCSI，1)但非两者的CQI报告，因为这些值中的一个应指示无CSI请求。将需要另外的位来触发使用两种测量集的CSI报告。
方法200因此提供了两种隐式触发的解决方案：图6、7A、7B和8中示出的解决方案222和图9A和9B中示出的解决方案224。
情形2：针对两种测量集的显式非周期CSI报告
在一些实施例中，方法200提供了四种可能的显示触发机制230来触发针对灵活子帧的非周期报告。在可在不具有HARQ时间线约束的情况下起作用的第二组解决方案中，UL授权可能在任意子帧上被发送并且触发CSI测量子帧集之一的非周期CSI报告。
解决方案3(232)
在第一显式解决方案232中，UL授权在其上被发送的DL子帧指示测量子帧集。当两个测量子帧集被配置时，其中UL授权被发送的DL子帧确定将在非周期CSI报告中使用的子帧集。该方法在当前说明书中，并且能够被重用于eIMTA场景。
图10A和10B根据一些实施例示出了解决方案232。在图10A的示例中，如果UL授权在常规DL子帧0、1、5和6中被发送，则CSI报告针对CSI测量子帧集0(CCSI，0)被发送。在图10B的示例中，如果UL授权在灵活子帧3、4、7、8和9中被发送，则CSI报告针对CSI测量子帧集1(CCSI，1)被发送。在后一情形下，为使UL授权被从eNB发送到UE，灵活子帧将首先不得不被转换为下行链路子帧。
解决方案4(234)
在第二显式解决方案234中，在一些实施例中，上行链路DCI格式中的两个位被用于指示(一个或多个)测量子帧集。表1示出了在一些实施例中解决方案234如何被实现的示例。使用两个位定义了四种状态，其中任一或两个CSI测量子帧集可被触发。
表1.使用两个位的预定触发方式
00 无触发
01
10
11 针对CSI测量子帧集0和1的CSI报告两者都被触发
解决方案5(236)
在第三显式解决方案236中，在一些实施例中，(一个或多个)被触发的集合由无线资源控制(RRC)信令进行配置。假设一个位被使用，以下给出了例示表格：
表2.由RRC配置的被触发的集合
0 无触发
1 由RRC配置的(一个或多个)CSI测量子帧集被触发
在一些实施例中，表2被解释如下：
·如果RRC仅配置集合0，则位“1”仅触发集合0
·如果RRC仅配置集合1，则位“1”仅触发集合1
·如果RRC配置集合{集合0，集合1}，则位“1”仅触发集合0和集合1。
作为解决方案236的另一选项，在一些实施例中，RRC可以配置另一集合是否一起被触发，如表3中所示。
表3.与解决方案232组合的由RRC配置的被触发的集合
在一些实施例中，如果两个位被使用，表4示出了解决方案236的另一选项
表4.由RRC配置的三个被触发的集合
在第二和第三RRC参数集未被配置的情形下，字段10和11不被使用。因此，在此情形下，UE可以使用位b0作为虚拟CRC。
解决方案6(238)
当eIMTA与载波聚合(CA)或多点协作(CoMP)传输一起被使用时，第四显式解决方案238被采用。在一些实施例中，当eIMTA与CA和/或CoMP一起被使用时，方法200更为复杂。作为将被用于eIMTA+CA、eIMTA+CoMP、或eIMTA+CA+CoMP的一般解决方案，下述内容可被考虑。注意对于CA+CoMP，当RRC参数集被配置时，服务小区和CSI处理一起被配置。ASN.1中的详细参数将定义针对每个CSI处理的配置的服务小区(例如，参见TS36.331)。因此，用于定义针对eIMTA+CA+CoMP的RRC参数的类似的机制可被使用。
服务小区配置针对每个CSI处理被定义，并且CSI处理针对eIMTA的每个集合被定义，并且针对eIMTA的集合配置被定义。下面示出了示例：
表5.显式解决方案238的示例
如表5中所描述的，非周期CSI报告针对由较高层配置的(一个或多个)CSI子帧集和(一个或多个)CSI处理对或CSI处理中的第1集合和第2集合被触发。
虽然已经参照有限数目的实施例描述了本申请，但是本领域技术人员将由此领会到多种修改和变更。意在所附权利要求覆盖落入本发明的真实精神和范围内的所有这样的修改和变更。

Claims (25)

1.一种用于无线网络中的用户设备UE，包括：
无线收发器，该无线收发器通过所述无线网络中的物理下行链路控制信道PDCCH从演进型节点B eNB接收帧中的信道状态信息CSI请求，其中所述CSI请求包括两位的CSI请求字段；以及
CSI模块，如果所述CSI请求字段的两个位的值指示非周期CSI报告被触发并且如果该值与一个或多个CSI处理和CSI子帧测量集对以及一个或多个CSI处理中的至少一个相关联，则该CSI模块生成所述非周期CSI报告，其中所述CSI子帧测量集指定所述帧的哪些子帧被用于生成所述非周期CSI报告；以及如果所述CSI请求字段的两个位的值指示非周期CSI报告未被触发，则该CSI模块丢弃所述CSI请求。
2.如权利要求1所述的UE，其中，所述无线网络是加强干扰抑制和流量适应eIMTA网络。
3.如权利要求1所述的UE，其中，所述无线收发器还通过所述无线网络中的物理上行链路共享信道PUSCH将所述非周期CSI报告发送给所述eNB。
4.如权利要求1所述的UE，其中，所述帧包括任意一个或多个下行链路DL子帧、上行链路UL子帧、常规子帧和灵活子帧，其中一个或多个灵活子帧能够被从UL子帧改变为DL子帧。
5.如权利要求1所述的UE，其中，所述值是“00”，其指示CSI报告未被触发。
6.如权利要求1所述的UE，其中，所述值是“01”，其指示所述非周期CSI报告针对所述一个或多个CSI处理和CSI子帧测量集对以及所述一个或多个CSI处理中的至少一个而被触发，所述CSI子帧测量集由针对一个服务小区的层来配置。
7.如权利要求1所述的UE，其中，所述值是“10”，其指示所述非周期CSI报告针对第一CSI处理和CSI子帧测量集对以及所述CSI处理的第一集合中的至少一个而被触发，所述CSI子帧测量集由针对不止一个服务小区的层来配置。
8.如权利要求1所述的UE，其中，所述值是“11”，其指示所述非周期CSI报告针对第二CSI处理和CSI子帧测量集对以及所述CSI处理的第二集合中的至少一个而被触发，所述CSI子帧测量集由针对不止一个服务小区的层来配置。
9.如权利要求2所述的UE，其中，所述UE被用于采用协调多点CoMP传输机制的所述eIMTA网络中。
10.一种由用于无线网络中的用户设备UE采用的方法，包括：
通过所述无线网络中的物理下行链路控制信道PDCCH从演进型节点B eNB接收帧中的信道状态信息CSI请求，其中所述CSI请求包括两位的CSI请求字段；以及
如果所述CSI请求字段的两个位的值指示非周期CSI报告被触发并且如果该值与一个或多个CSI处理和CSI子帧测量集对以及一个或多个CSI处理中的至少一个相关联，则生成所述非周期CSI报告，其中所述CSI子帧测量集指定所述帧的哪些子帧被用于生成所述非周期CSI报告；以及如果所述CSI请求字段的两个位的值指示非周期CSI报告未被触发，则丢弃所述CSI请求。
11.如权利要求10所述的方法，其中，所述无线网络是加强干扰抑制和流量适应eIMTA网络。
12.如权利要求10所述的方法，还包括：
通过所述无线网络中的物理上行链路共享信道PUSCH将所述非周期CSI报告发送给所述eNB。
13.如权利要求10所述的方法，其中，所述帧包括任意一个或多个下行链路DL子帧、上行链路UL子帧、常规子帧和灵活子帧，其中一个或多个灵活子帧能够被从UL子帧改变为DL子帧。
14.如权利要求10所述的方法，其中，所述值是“00”，其指示CSI报告未被触发。
15.如权利要求10所述的方法，其中，所述值是“01”，其指示所述非周期CSI报告针对所述一个或多个CSI处理和CSI子帧测量集对以及所述一个或多个CSI处理中的至少一个而被触发，所述CSI子帧测量集由针对一个服务小区的层来配置。
16.如权利要求10所述的方法，其中，所述值是“10”，其指示所述非周期CSI报告针对第一CSI处理和CSI子帧测量集对以及所述CSI处理的第一集合中的至少一个而被触发，所述CSI子帧测量集由针对不止一个服务小区的层来配置。
17.如权利要求10所述的方法，其中，所述值是“11”，其指示所述非周期CSI报告针对第二CSI处理和CSI子帧测量集对以及所述CSI处理的第二集合中的至少一个而被触发，所述CSI子帧测量集由针对不止一个服务小区的层来配置。
18.如权利要求11所述的方法，其中，所述UE被用于采用协调多点CoMP传输机制的所述eIMTA网络中。
19.一种用于无线网络中的演进型节点B eNB，包括：通信模块，该通信模块：
通过所述无线网络中的物理下行链路控制信道PDCCH向用户设备U发送帧中的信道状态信息CSI请求，其中所述CSI请求包括两位的CSI请求字段；以及
如果所述两位的值指示非周期CSI报告被触发并且如果该值与一个或多个CSI处理和CSI子帧测量集对以及一个或多个CSI处理中的至少一个相关联，则通过所述无线网络中的物理上行链路共享信道PUSCH从所述UE接收所述非周期CSI报告，其中所述CSI子帧测量集指定所述帧的哪些子帧被用于生成所述非周期CSI报告。
20.如权利要求19所述的eNB，其中，述无线网络是加强干扰抑制和流量适应eIMTA网络。
21.如权利要求19所述的eNB，其中，所述帧包括任意一个或多个下行链路DL子帧、上行链路UL子帧、常规子帧和灵活子帧，其中一个或多个灵活子帧能够被从UL子帧改变为DL子帧。
22.如权利要求19所述的eNB，其中，所述值是“00”，其指示CSI报告未被触发。
23.如权利要求19所述的eNB，其中，所述值是“01”，其指示所述非周期CSI报告针对所述一个或多个CSI处理和CSI子帧测量集对以及所述一个或多个CSI处理中的至少一个而被触发，所述CSI子帧测量集由针对一个服务小区的层来配置。
24.如权利要求19所述的eNB，其中，所述值是“10”，其指示所述非周期CSI报告针对第一CSI处理和CSI子帧测量集对以及所述CSI处理的第一集合中的至少一个而被触发，所述CSI子帧测量集由针对不止一个服务小区的层来配置。
25.如权利要求19所述的eNB，其中，所述值是“11”，其指示所述非周期CSI报告针对第二CSI处理和CSI子帧测量集对以及所述CSI处理的第二集合中的至少一个而被触发，所述CSI子帧测量集由针对不止一个服务小区的层来配置。
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