CN104508989A - 用于协调多点的参考信号配置 - Google Patents

用于协调多点的参考信号配置 Download PDF

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Publication number
CN104508989A
CN104508989A CN201380036519.9A CN201380036519A CN104508989A CN 104508989 A CN104508989 A CN 104508989A CN 201380036519 A CN201380036519 A CN 201380036519A CN 104508989 A CN104508989 A CN 104508989A
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China
Prior art keywords
csi
resource
index
rrc
configuration
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CN201380036519.9A
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CN104508989B (zh
Inventor
K·艾特玛德
A·戴维多夫
G·莫罗佐夫
I·波洛廷
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Apple Inc
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Intel Corp
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Priority to CN201610533686.XA priority Critical patent/CN105978677B/zh
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Abstract

协调多点(CoMP)涉及多个传输点或传输小区，这些传输点或传输小区协调其单独的传输，使得目标用户装备(UE)经历增强的信号接收和/或减小的干扰，从而以最佳方式实现下行链路CoMP，服务小区需要获取用于从多个传输点到UE的下行链路信道的信道状态信息(CSI)。本公开涉及无线电资源控制(RRC)信令，其用于将UE配置成用于获取并报告用于那些下行链路信道的CSI。

Description

用于协调多点的参考信号配置
优先权要求
本申请要求2013年3月12日提交的美国专利申请S/N.13/796,720的优先权权益，该美国专利申请要求了2012年8月3日提交的美国临时专利申请S/N.61/679,627的优先权权益，这两项申请通过引用被整体结合在此。
背景技术
作为第三代伙伴计划(3GPP)发布的LTE规范的发布10的部分，LTE-高级型(长期演进-高级型或LTE-A)的主要特征在于对协调多点(CoMP)所增加的支持。在用于下行链路的CoMP中，多个小区每一个都具有传输点(TP)，所述多个小区在向移动设备或终端(LTE中被称为用户装备(UE))进行发送时彼此协调，以产生减少的干扰和/或增强的信号强度。为了使协作小区的集合能够采用CoMP向特定目标UE进行发送，需要获取存在于小区的TP和目标UE之间的下行链路信道的信息。本公开的主要关注点是将UE配置成用于传递这种信息。
附图说明
图1示出示例CoMP系统。
图2示出联合传输CoMP的示例。
图3示出协调调度和协调波束成形CoMP的示例。
图4示出通过RRC信令对CSI配置信息进行的传输。
图5是表格，对于普通循环前缀的情况，通过该表格，使用CSI-RS配置号和特定的天线端口将CSI参考信号映射到特定的RE。
图6是表格，对于扩展循环前缀的情况，通过该表格，使用CSI-RS配置号和特定的天线端口将CSI参考信号映射到特定的RE。
图7示出使用16位的位映射将零功率CSI参考信号映射到资源元素的示例。
图8示出使用32位的位映射将零功率CSI参考信号映射到资源元素的示例。
图9是表格，通过该表格，子帧配置号定义CSI参考信号的周期性。
具体实施方式
下列描述及附图充分示出了具体实施例，以使本领域技术人员能够实施它们。其他的实施例可以结合结构、逻辑、电、进程及其他改变。一些实施例的部分和特征可被包括在其他实施例的部分和特征中，或者可代替其他实施例的部分和特征。在权利要求中所陈述的实施例包括这些权利要求的所有可用的等效技术方案。
CoMP涉及多个传输点或传输小区，这些传输点或传输小区协调其个体的传输以使目标UE经历增强的信号接收和/或减少的干扰。参与CoMP的TP或小区可以是基站(在LTE中被称为演进型节点B(eNB))，或者可以是eNB所操作的远程无线电头(RRH)。用于执行CoMP的技术可以被广泛分为两类：协调调度和协调波束成形(CS/CB)以及联合传输(JT)。CS/CB涉及多个经协调的小区，其共享用于多个UE的信道状态信息(CSI)，同时仅从一个TP发送被发送到特定UE的用户平面数据。JT涉及多个经协调的TP，其利用合适的波束成形权重，向特定UE发送相同的用户平面数据。TP选择(TPS)是特殊形式的JT，其中，在任一时刻，仅有单个TP向特定UE发送经波束成形的用户平面数据，但是，在不同时例(例如，在子帧之间)，发送用户平面数据的TP可以改变。本公开的主要焦点是用于信道状态信息的CoMP测量集合和反馈的RRC信令和配置。
系统描述
图1示出UE D1的示例，UE D1包含接口到射频(RF)收发电路22的处理器21，射频(RF)收发电路22被连接到一根或多根天线23。传输点TP1到TPN(其中N是协调集合中传输点的数量)被示出为每一个都包含接口到RF收发电路42的处理器41，RF收发电路42被连接到多根天线43。所示出的组件旨在代表任何类型的硬件/软件配置，这些硬件/软件配置用于为LTE通信提供空中接口，并且用于执行本文所描述的处理功能。传输点TP1被示出为是UE D1的服务小区，并且可以是eNB或其他类型的基站。传输点TP2到TPN是非服务CoMP协调小区，并且可以是基站或eNB所操作的RRH。eNB通过标准化的X2接口彼此进行通信，而RRH通常通过光纤链路被连接到eNB。借助这些通信链路，TP可以如下文所述协调其传输，并且可以共享从UE接收到的信道状态信息。
LTE的物理层基于用于下行链路的正交频分复用(OFDM)和相关的用于上行链路的单载波频分复用(SC-FDM)技术。在OFDM中，根据诸如QAM(正交调幅)之类的调制方案的复合调制码元的每一个都被单独地映射到在OFDM码元期间所发送的特定OFDM子载波，该特定的OFDM子载波被称为资源元素(RE)。该OFDM子载波在传输之前被升频到RF(射频)载波。RE是LTE中最小的时频资源，并且通过天线端口、子载波位置和OFDM码元索引被唯一地标识出来。出于波束成形或空间复用的目的，可使用多根天线来发送RE。对应于十二个连续的在单个0.5ms时隙之内的子载波的资源元素组被称为资源块(RB)，或者就物理层而言，被称为物理层资源块(PRB)。两个连续的时隙构成1ms LTE子帧。eNB根据RB对，为每个UE动态地调度用于上行链路和下行链路的时频资源。LTE也提供载波聚合，凭借载波聚合，多个RF载波(每一个都被称为分量载波(CC))被并行地发送到相同的UE/从相同的UE发送，以提供总的更宽的带宽和相应的更高的数据传输速率。载波聚合以对每个UE专用的方式得以实现，其中，一个CC被指定为主载波或主小区，剩下的CC被指定为次载波或次小区。
COMP的主要目的在于对小区的边缘区域处的终端所经历的干扰问题进行处理。图2和图3分别示出JT和CS/CB情况下的下行链路CoMP的操作。在图2中，服务小区TP1和其他协调小区TP2和TP3全部联合地向小区边缘终端UE1发送。通过相干地或非相干地对联合传输进行组合，终端处的接收功率得以增加。在图3中，协调小区TP2和TP2以减少UE1处干扰的方式协调其天线加权以及协调对向除UE1之外的终端的下行链路传输进行的调度。为了执行这些功能中的任意一个功能，也为了选择TP的最佳配置，服务小区需要知晓从每个TP到目标UE的下行链路信道。LTE提供参考信号，该参考信号可被UE用于获取用于发送小区的下行链路信道状态信息(CSI)，该参考信号被称为信道状态信息参考信号(CSI-RS)。然后，UE可以通过CSI报告的形式向服务小区反馈这样获取的CSI。
可以使用RE并且跨越整个发送带来发送CSI-RS，所述RE否则被分配到具有可配置的周期性的PDSCH。小区可以发送多达八个CSI-RS，每个CSI-RS对应不同的天线端口。UE可以使用CSI-RS来估计信道，并且生成CSI报告，该CSI报告通过物理上行链路控制信道(PUCCH)往回反馈到服务小区。信道状态信息报告可以包括：信道质量指示符(CQI)，其代表能够不超过所指定的误码率而在信道中被使用的最高调制和编码方案；秩指示符(RI)，其代表可在信道中使用的空间复用层的数量；预编码矩阵指示符(PMI)，其代表用于向UE进行发送的优选的天线加权方案；以及子带(SB)指示符，其代表UE所优选的子载波。为了将UE配置成用于接收并处理参考信号，并且用于以信道状态信息报告的形式提供合适的反馈，eNB使用无线电资源控制(RRC)协议用信号通知UE。
LTE空中接口也被称为无线电接入网(RAN)，其具有基本可描述如下的协议架构。在控制平面，无线电资源控制(RRC)层控制无线电资源的使用，并且通过信令无线电承载与分组(packet)数据压缩协议(PDCP)层进行通信。在用户平面，PDCP层接收IP(互联网协议)分组被映射到的无线电承载。PDCP层通过无线电承载与无线电链路控制(RLC)层进行通信，并且RLC层通过逻辑信道与介质访问控制(MAC)层进行通信。MAC层通过传输层与物理层(PHY)进行通信。用于数据传输的主传输信道，即上行链路共享信道(UL-SCH)和下行链路共享信道(DL-SCH)在物理层被分别映射到物理上行链路共享信道(PUSCH)和物理下行链路共享信道(PDSCH)。如图4中所示，将CSI-RS配置信息从eNB发送到UE的RRC消息源于eNB的RRC层，在遍历了协议层之后，随后通过PDSCH向UE发送。然后，UE在其对应的RRC层处理该消息。
CSI-RS和测量配置
下文描述了用于RRC信令的技术，该RRC信令与用于CoMP测量集合的CSI测量和反馈配置有关，其中，CoMP测量集合被定义为非零功率CSI-RS的集合，该非零功率CSI-RS的集合由特定TP发送，UE将关于上述特定TP执行CSI测量。基于那些测量，UE将CSI报告往回发送到服务小区。基于RSRP(参考信号接收功率)和其他考虑(如：SRS(测探参考信号)测量)，服务小区选择待被包括在CoMP测量集合中的CSI-RS的集合。借助于RRC消息，服务小区eNB将UE配置为用于测量特定TP所发送的CSI-RS，并且将基于该CSI-RS的CSI报告发送到eNB。如下文所述，上述配置涉及通知UE用于一个或多个TP所发送的非零功率(NZP)和零功率(ZP)CSI-RS的下行链路时频资源。也定义干扰测量资源(IMR)，其被UE用于确定从协调小区和不是CoMP协调集合的部分的相邻小区接收到的干扰量。此外，为UE所作的反馈指定特定的CSI过程，其中，每个此类的CSI过程既包括NZP-CSI-RS资源又包括干扰测量资源。对于每个CSI过程，也定义UE以CSI报告的形式提供反馈的方式。这些配置在RRC信令所发送的不同信息元素(IE)中(诸如在RRCReconfiguration消息中)被捕捉。
一个信息元素CSI-RS-Config-r11定义了包括非零功率(NZP)CSI-RS资源和零功率(ZP)CSI-RS资源以及干扰测量(IM)资源的集合的CSI-RS配置。以用于CSI-RS配置的抽象语法标记.1(ASN.1)来表示的RRC消息的示例如下：
在以上代码片段中，csi-RS-ConfigNZP-r11字段定义了：具有身份索引的NZP CSI-RS资源(CSI-RS-Identity-NZP-r11)；天线端口的数量(antennaPortsCount-r11)，CSI-RS将从这些天线端口被发送，该天线端口的数量对应CSI参考信号的数量；CSI-RS配置号(resourceConfig-11)；子帧周期性和偏移(subframeConfig-r11)；以及相对于PDSCH的功率等级的CSI-RS的相对功率等级(p-C-r10)，计算CSI以得到该相对功率等级。使用图5和图6所示的分别用于普通的和扩展的循环前缀的表格(参见3GPP TS 36.211发布10，表6.10.5.2-1和6.10.5.2-2)，用CSI-RS配置号和特定的天线端口将CSI-RS映射到特定的RE。
以上代码中的zeroTxPowerCSI-RS-r11字段定义ZP CSI-RS资源和IM资源。在一个实施例中，干扰测量资源属于经配置的ZP CSI-RS的集合。在一个实施例中，用于配置ZP CSI-RS的zeroTxPowerResourceConfigList-r11字段是16位的位映射，其中，每一位对应被用作ZP CSI-RS资源的子帧中的四个RE。图7中示出对具有四个RE粒度的ZP CSI-RS资源的位映射分派的示例，其针对具有普通循环前缀长度位的子帧，其中，b0到b9中的每一位对应四个RE。如果需要更高粒度的ZP CSI-RS，则可以将位串的长度扩展到32位，其中b0到b19中的每一位对应两个RE，如图8中所示。
由于一些ZP CSI-RS可被用于改善相邻小区的NZP CSI-RS资源上的信号干扰噪声比(SINR)，因此干扰测量资源可以是ZP CSI-RS的子集。然后，有必要指示应当被UE用于干扰测量的ZP CSI-RS的子集。可以使用相同的位映射方式将ZP CSI-RS资源的子集指明为IM资源，其中，如以上代码中所示，为zeroTxPowerCSI-RS-r11 RRC命令引进16位长度的字段resourceConfigList-r11以指示哪个ZP CSI-RS被用于干扰测量。所指示的干扰测量资源应当是由zeroTxPowerResourceConfigList-r11配置的ZP CSI-RS的子集。在另一个实施例中，指示两个或四个RE的(取决于实施例)的处于(0...31)或(0...15)范围内的一个ZP CSI-RS资源索引被作为信号发送，以指示干扰测量资源，其中，resourceConfig-r11字段对应TS 36.211的表6.10.5.2-1和6.10.5.2-1中所定义的配置号，就像上述规范中的表中对CSI-RS配置号所定义的那样(其中，两个或四个RE分别对应两个或四个CSI参考信号)。所指示的干扰测量资源应当是由zeroTxPowerResourceConfigList-r11配置的ZP CSI-RS的子集。
在另一个实施例中，NZP CSI-RS资源可附加于ZP CSI-RS资源或取代ZP CSI-RS资源用作干扰测量。在这种情况下，interfMeasurementResource-r11字段可被增加到csi-RS-r11信令中，以指示除了信道测量之外，UE是否应当测量NZP CSI-RS资源上的干扰。ASN.1中的RRC消息的示例为：
替代地，可使用单独的RRC消息来定义IM资源配置，并且将该IM资源配置作为resourceConfig-r11位映射(或对于另一个实施例而言的一个ZP CSI-RS资源配置)和子帧配置(subframeConfig-r11)的组合来作为信号发送，其中，由CSI-IM-Identity-r11字段来标识每个IM资源。RRC消息的示例为：
子帧配置通过36.211中的表6.10.5.3-1来定义，如图9中所示。表6.10.5.3-1中列出用于CSI参考信号的发生的子帧配置周期TCSI-RS和子帧偏移△CSI-RS。可以单独地为CSI参考信号配置参数ICSI-RS，UE将承担用于此CSI参考信号的非零传输功率和零传输功率。包含CSI参考信号的子帧应当满足下列方程：
可以为UE配置多个IM资源，以使UE能够对多个干扰假设进行干扰测量，如下列示例消息中所示：
CSI-IM-List-r11       SEQUENCE{
    CSI-IM-Identity-r11          INTEGER(0..3),
}                                OPTIONAL--Need ON
在另一个实施例中，可以为CSI-RS-Identity-NZP-r11和CSI-IM-Identity-r11假定隐式的编索引(通过配置的次序)。在那种情况下，CSI-RS-Identity-NZP-r11和CSI-IM-Identity-r11字段的配置对测量资源配置而言不是必要的。
CSI过程被配置为NZP CSI-RS、IM资源和测量子帧集合的组合。每个CSI过程由CSI过程索引(以下示例代码中的csi-Process-Identity-r11)来标识，子帧集合由csi-MeasSubframeSet-r11来标识。对于每个CSI过程，UE测量下行链路信道的质量，并且生成信道状态信息报告，如上文所述，该报告包括CQI、RI、PMI和优选的子带。测量子帧指明UE要测量并报告其信道质量的特定的子帧。用于每个CSI过程的参数也可以包括下列字段：common-RI-Report-r11,common-SB-Report-r11和common-RI-PMI-Report-r11，它们指示来自ref-Csi-Process-Identity-r11所标识的CSI过程之一的RI复用、优选的子带和/或RI-PMI。示例消息如下：
如果为特定的CSI配置common-RI-Report-r11、common-SB-Report-r11和common-RI-PMI-Report-r11，则秩指示符、子带的优选集合和预编码矩阵标识符/秩指示符分别被丢弃，并且在用于CSI过程的信道状态信息报告中不被发送，以节省信令开销。针对在PUCCH上用于冲突处理的周期性报告的CSI丢弃规则应当考虑到报告不被发送以及PUCCH资源是空闲的。在这种情况下，应当基于CSI过程的报告来计算用于该CSI过程的CSI反馈，所述CSI过程是由与参考CSI过程相关联的ref-Csi-Process-Identity-r11所指示的。
在以上代码示例中，当配置载波聚合时，可以使用附加的参数cellIdx-r11来指示小区，该小区上定义了CSI过程。可以为主载波，将用于多个CSI过程的CSI反馈的参数配置如下：
可以为次载波，将用于多个CSI过程的CSI反馈的参数配置如下：
在另一个实施例中，在每个分量载波中的csi-Process-Identity-r11参数是唯一的。在一个实施例中，横跨多个经配置的载波的参数csi-Process-Identity-r11是唯一的。在后一种情况下，例如可以将csi-Process-Identity-r11参数定义在0到31的范围内。每个分量载波小区的CSI报告可以按CSI过程索引的升序次序被串接，紧跟其后是来自按小区索引的升序次序的多个分量载波的CSI报告串接。如果只能为CC配置一个CSI过程(例如，当没有CoMP时或者为此类CC配置了不支持CoMP的传输模式时)，可以在默认情况下将csi-Process-Identity-r11的值假定为例如是csi-Process-Identity-r11＝1(或0)。
期望UE为特定的CSI过程仅使用其信道状态信息报告中的特定PMI。可以通过RRC消息，将用于相关联的CSI过程的受限制的PMI的集合从eNB传递到UE。也为UE配置传输模式的示例消息如下列代码：
针对特定CSI过程将被限制的一个或多个PMI在以上代码片段中分别由字段codebookSubsetRestriction-r11和csi-Process-Identity-r11标识。可以定义多个codebookSubsetRestriction-r11(每个具有相关联的CSI过程)以指示针对那个过程的一个或多个受限制的PMI。
对于CoMP，定义新的传输模式(如：TM10)，该传输模式支持用于一个或多个CSI过程的CSI报告，并且将基于随机的UE专用参考信号的预编码用于回退模式。新的传输模式使用DCI和准共同位置(PQI)字段来通知UE关于传输点或传输点集合的信息，所述DCI基于具有PDSCH RE映射的格式2D。
当网络使用由PDCCH或增强型PDCCH所携带的DCI的CSI请求字段中的标记显式地请求UE传递非周期性信道状态报告时，UE传递该非周期性信道状态报告。CSI请求字段是两位的字段，当该字段被设置为“00”时，没有CSI报告被请求，如LTE规范(参见3GPP TS 36.213)中所描述的那样。当CSI请求字段被设置成“10”或“11”时，其指示为更高层所配置的CSI过程中两个供选择集合中的一个触发CSI报告。当在CSI请求字段中检测到标记时，可以使用RRC信令来告知UE哪个CSI过程待被报告。示例RRC消息如下所示定义非周期性反馈aperiodicCSI-Trigger-r11：
以上代码中的aperiodicCSI-Trigger-r11字段指示当一个或多个CSI过程经配置时，为哪些CSI过程触发非周期性CSI报告。trigger1-r11字段是对应CSI请求字段“10”的位串，而trigger2-r11字段是对应CSI请求字段“11”的位串。位串中的每一位对应特定的CSI过程。例如，位串中的位0可对应CSIProcessId＝0的CSI过程，而位串中的位1可对应CSIProcessId＝1的CSI过程，以此类推。每一位具有值0，意味着没有为那个CSI过程触发非周期性的CSI报告，或者具有值1，意味着触发非周期性CSI报告。在以上代码示例中，trigger1-r11和trigger2-r11是15位的位串，意味着在每一个位串中至多有15位可以被设置为值1以请求15个CSI报告。当基于UE的能力，结合载波聚合来使用CoMP时，位串的尺寸应当取决于横跨所有载波，待为UE配置的CSI过程的最多数量。在以上示例中，尺寸为15的位串尺寸可用于三个CSI过程，这三个CSI过程被配置在五个载波中的每个载波上。在另一个实施例中，如果每个载波允许最多四个CSI过程，则可以使用20位的索引以允许位串中最多有20位被设置为值1。同样，在另一些实施例中，可定义更多的触发字段。例如，trigger1-r11,trigger2-r11,trigger3-r11等可被包括在RRC消息中，该RRC消息具有可相应地为DCI中的CSI请求字段所分配的更多位。同样，在一个实施例中，对于PDCCH公共搜索空间，CSI请求字段是一位，并且可被用于触发具有最小CSI过程索引的CSI过程。
示例实施例
在示例实施例中，担当eNB的基站和UE都包括用于提供LTE空中接口的收发机和被连接到该收发机的处理电路。eNB被配置成用于担当UE的服务小区以及担当用于UE的多个协作的协调多点(CoMP)传输点(TP)中的一个。UE的处理电路用于根据下列示例实施例中的任何或全部实施例，接收由eNB发送的RRC消息传递。eNB的处理电路可用于通过向UE发送无线电资源控制(RRC)配置消息，将UE配置成用于接收由一个或多个协作的TP所发送的信道状态信息(CSI)参考信号(CSI-RS)，其中，RRC配置消息包括：经索引的非零功率(NZP)CSI-RS资源的集合，其被包括在CoMP测量集合中；零功率(ZP)CSI-RS资源的集合；以及干扰测量(IM)资源，其被UE用于进行干扰测量。RRC消息可以进一步包括：子帧配置周期、IM资源和ZP CSI-RS，所述子帧配置周期包括用于单独地指明NZP CSI-RS的周期性的子帧偏移。IM资源可以是经索引的IM资源的集合，并且可以是ZP CSI-RS资源集合的子集。可以将ZP CSI-RS资源的集合作为位映射(如：16位)来发送，每一位对应将被认为具有零传输功率的特定的CSI-RS配置；可以用位映射来来配置IM资源的集合，该位映射指示哪些ZP-CSI资源将被用为干扰测量。可以用位映射(如：16位)来配置IM资源的集合，其中每一位对应属于ZP CSI-RS的集合的四个资源元素(RE)的特定组；或者用位映射(如：32位)来配置IM资源的集合，其中每一位对应属于ZP CSI-RS资源的集合的特定的资源元素(RE)对。IM资源的集合可配置成具有四个天线端口的特定CSI-RS配置，这四个天线端口的资源将被UE用于干扰测量；或者IM资源的集合配置成具有两个天线端口的特定CSI-RS配置，这两个天线端口的资源将被UE用于干扰测量。处理电路可用于在RRC消息中发送NZP CSI-RS资源的显式的索引，或者可按在RRC消息中的配置的次序，隐式地指示NZP CI-RS资源的索引。RRC配置消息可包括指示，其指明一个或多个特定的NZP CSI-RS资源是被UE用于干扰测量的干扰测量(IM)资源。处理电路可用于发送包括多个经索引的IM资源的配置的RRC消息，以使UE能够对多个干扰假设进行干扰测量。处理电路可用于在RRC消息中发送IM资源显式的索引，或者可按IM资源在RRC消息中的配置的次序，隐式地指示IM资源的索引。处理电路可用于在RRC消息中发送NZP CSI-RS资源的显式的索引，或者可按NZP CI-RS资源在RRC消息中的配置的次序，隐式地指示NZP CI-RS资源的索引。处理电路可用于通过RRC消息传递来配置一个或多个经索引的CSI过程，其中每个CSI过程作为NZP CSI-RS资源、IM资源和测量子帧的集合，该测量子帧集合指明UE为哪些子帧报告CSI。可以配置两个或更多CSI过程，使得可以使用公共秩指示符(RI)、公共预编码矩阵指示符(PMI)或子带的公共优选集合来报告CSI。如果载波聚合经配置，则处理电路可用小区索引配置一个或多个经索引的CSI过程，该小区索引指示为哪个分量载波定义CSI过程。CSI过程索引可以横跨多个分量载波是唯一的，或在每个经配置的分量载波之内可以是唯一的。当分量载波上仅可配置一个CSI过程，或者仅可配置不支持CoMP的传输模式时，CSI过程索引可以等于默认值。处理电路可用于将UE配置成用于发送按CSI过程索引的升序次序串接的CSI报告，并且对于每个CSI过程索引，当载波聚合经配置时，每个CSI过程索引案小区索引的升序次序被串接。处理电路可用受限制的PMI的集合来配置每个CSI过程，用于报告CSI。处理电路可用于通过具有位串的RRC消息来配置非周期性的CSI过程集合，其中，位串的每一位对应CSI过程索引，并且指示当接收到对应的触发时是否由UE来报告CSI。
上述实施例可以被实现成用于操作的方法和/或被实现在各种硬件配置中，该硬件配置可包括用于执行实施上述方法的指令的处理器。此类指令可被包含在合适的存储介质中，这些指令从这些存储介质中被转移到存储器或其他处理器可执行的介质。
已经在LTE网络的上下文中描述了本主题。除了在会发生不一致的情况下，本主题可用于其他类型的蜂窝网络，其中，对UE和eNB的参考分别被对终端和基站的参考取代。
已连同前述具体实施例一起描述了本主题。应当理解，那些实施例也可被结合进被认为有利的任何方式中。同样，许多替代方案、变型和修改对本领域普通技术人员而言将是显而易见的。其他此类的替代方案、变型和修改旨在落入所附权利要求的范围之内。
提供摘要以符合37 C.F.R.的部分1.72(b)的规定，其要求摘要以允许读者查明技术公开的本质和主旨。应当理解，该摘要将不用于限制或解释权利要求的范围或含义。所附的权利要求由此被结合到具体实施方式中，每一项权利要求本身作为单独的实施例。

Claims (30)

1.一种用于在长期演进(LTE)网络中进行操作的用户装备(UE)设备，包括：
收发机，所述收发机用于向演进型节点B(eNB)提供LTE空中接口；以及
处理电路，所述处理电路被连接到所述收发机，并且用于：
接收来自所述eNB的无线电资源控制(RRC)配置消息，所述无线电资源控制(RRC)配置消息将所述UE配置成用于接收从一个或多个协调多点(CoMP)传输点(TP)发送的信道状态信息(CSI)参考信号(CSI-RS)；
其中，所述RRC配置消息包括：待被包括在CoMP测量集合中的经索引的非零功率(NZP)CSI-RS资源的集合、零功率(ZP)CSI-RS资源的集合以及被所述UE用于进行干扰测量的干扰测量(IM)资源。
2.如权利要求1所述的设备，其特征在于，IM资源的集合是所述ZPCSI-RS资源的集合的子集。
3.如权利要求2所述的设备，其特征在于，将所述ZP CSI-RS资源的集合作为16位的位映射来发送，每一位对应被认为具有零传输功率的特定的CSI-RS配置，并且进一步用指示哪些ZP-CSI资源被用于干扰测量的位映射来配置所述IM资源的集合。
4.如权利要求1所述的设备，其特征在于，所述RRC配置消息进一步包括指示，所述指示表明一个或多个特定的NZP CSI-RS资源是被所述UE用于进行干扰测量的干扰测量(IM)资源。
5.如权利要求1所述的设备，其特征在于，所述处理电路用于接收RRC配置消息传递，所述RRC配置消息传递配置一个或多个经索引的CSI过程，其中，每个CSI过程是ZP CSI-RS资源、IM资源和测量子帧集合的组合，所述测量子帧集合指明所述UE为哪些子帧集合报告CSI。
6.如权利要求5所述的设备，其特征在于，所述处理电路用于接收RRC配置消息传递，所述RRC配置消息传递配置两个或更多CSI过程，使得使用公共秩指示符(RI)、公共预编码矩阵标识符(PMI)或子带的公共优选集合来报告CSI。
7.如权利要求1所述的设备，其特征在于，所述处理电路用于接收RRC配置消息传递，所述RRC配置消息传递通过RRC消息传递来配置一个或多个经索引的CSI过程，其中，每个CSI过程是NZP CSI-RS资源、IM资源和测量子帧集合的组合，所述测量子帧集合指明所述UE为哪些子帧集合报告CSI。
8.如权利要求7所述的设备，其特征在于，所述处理电路用于接收RRC配置消息传递，所述RRC配置消息传递配置两个或更多CSI过程，使得使用公共秩指示符(RI)、公共预编码矩阵指示符(PMI)或子带的公共优选集合来报告CSI。
9.一种用于担当长期演进(LTE)网络中演进型节点B(eNB)的基站，包括：
收发机，所述收发机用于向多个终端提供LTE空中接口；以及
处理电路，所述处理电路被连接到所述收发机，并且用于：
担当用户装备(UE)的服务小区以及担当用于所述UE的多个协作的协调多点(CoMP)传输点(TP)中的一个传输点(TP)；
通过向所述UE发送无线电资源控制(RRC)配置消息，将所述UE配置成用于接收从一个或多个协作的TP发送的信道状态信息(CSI)参考信号(CSI-RS)；
其中，所述RRC配置消息包括：待被包括在CoMP测量集合中的经索引的非零功率(NZP)CSI-RS资源的集合、零功率(ZP)CSI-RS资源的集合以及被所述UE用于进行干扰测量的经索引的干扰测量(IM)资源的集合；并且
其中，所述IM资源的集合是所述ZP CSI-RS资源的集合的子集。
10.如权利要求9所述的基站，其特征在于，所述RRC消息进一步包括：子帧配置周期、IM资源和ZP CSI-RS，其中，所述子帧配置周期包括用于单独地指明所述NZP CSI-RS的周期性的子帧偏移。
11.如权利要求9所述的基站，其特征在于，将所述ZP CSI-RS资源的集合作为位映射来发送，每一位对应被认为具有零传输功率的特定的CSI-RS配置，并且进一步用指示哪些ZP-CSI资源被用于干扰测量的位映射来配置所述IM资源的集合。
12.如权利要求11所述的基站，其特征在于，用位映射配置所述IM资源的集合，其中每一位对应属于所述ZP CSI-RS的集合的四个资源元素(RE)的特定组；或者用位映射来配置所述IM资源的集合，其中每一位对应属于所述ZP CSI-RS的集合的特定的资源元素(RE)对。
13.如权利要求9所述的基站，其特征在于，所述IM资源的集合配置成具有四个天线端口的特定CSI-RS配置，所述四个天线端口的资源被所述UE用于干扰测量；或者所述IM资源的集合配置成具有两个天线端口的特定CSI-RS配置，所述两个天线端口的资源由所述UE用于干扰测量。
14.如权利要求9所述的基站，其特征在于，所述处理电路用于在所述RRC消息中发送所述NZP CSI-RS资源的显式的索引。
15.如权利要求9所述的基站，其特征在于，所述处理电路用于按所述RRC消息中所述NZP CSI-RS资源的配置的次序，隐式地指示所述NZP CSI-RS资源的索引。
16.一种用于担当长期演进(LTE)网络中演进型节点B(eNB)的基站，包括：
收发机，所述收发机用于提供LTE空中接口；以及
处理电路，所述处理电路被连接到所述收发机，并且用于：
担当用户装备(UE)的服务小区，并且担当用于所述UE的多个协作的协调多点(CoMP)传输点(TP)中的一个传输点(TP)；
通过向所述UE发送无线电资源控制(RRC)配置消息，将所述UE配置成用于接收从一个或多个协作的TP发送的信道状态信息(CSI)参考信号(CSI-RS)；
其中，所述RRC配置消息包括：待被包括在CoMP测量集合中的经索引的非零功率(NZP)CSI-RS资源的集合以及零功率(ZP)CSI-RS资源的集合；
其中所述RRC配置消息进一步包括指示，所述指示表明一个或多个特定的NZP CSI-RS资源是被所述UE用于进行干扰测量的干扰测量(IM)资源。
17.如权利要求16所述的基站，其特征在于，所述处理电路用于发送包括多个经索引的IM资源的配置RRC消息，以使所述UE能够对多个干扰假设进行干扰测量。
18.如权利要求17所述的基站，其特征在于，所述处理电路用于在所述RRC消息中发送所述IM资源的显式的索引。
19.如权利要求17所述的基站，其特征在于，所述处理电路用于按所述RRC消息中所述IM资源的配置的次序，隐式地指示所述IM资源的索引。
20.如权利要求16所述的基站，其特征在于，所述处理电路用于在所述RRC消息中发送所述NZP CSI-RS资源的显式的索引。
21.如权利要求16所述的基站，其特征在于，所述处理电路用于按所述RRC消息中所述NZP CSI-RS资源的配置的次序，隐式地指示所述NZP CSI-RS资源的索引。
22.一种用于操作长期演进(LTE)网络中演进型节点B(eNB)的方法，包括：
担当用户装备(UE)的服务小区，以及担当用于所述UE的多个协作的协调多点(CoMP)传输点(TP)中的一个传输点(TP)；
通过向所述UE发送无线电资源控制(RRC)配置消息，将所述UE配置成用于接收从一个或多个协作的TP发送的信道状态信息(CSI)参考信号(CSI-RS)；
其中，所述RRC配置消息包括：待被包括在CoMP测量集合中的经索引的非零功率(NZP)CSI-RS资源的集合、零功率(ZP)CSI-RS资源的集合以及被所述UE用于进行干扰测量的干扰测量(IM)资源的经索引的集合；并且
通过RRC消息传递来配置一个或多个经索引的CSI过程，其中每个CSI过程是NZP CSI-RS资源、IM资源和测量子帧集合的组合，所述测量子帧集合指明所述UE为哪些子帧报告CSI。
23.如权利要求22所述的方法，其特征在于，进一步包括两个或更多CSI过程，使得使用公共秩指示符(RI)、公共预编码矩阵指示符(PMI)或子带的公共优选集合来报告CSI。
24.如权利要求22所述的方法，其特征在于，进一步包括：如果载波聚合经配置，则用小区索引配置一个或多个经索引的CSI过程，所述小区索引指示为哪个分量载波定义所述CSI过程。
25.如权利要求24所述的方法，其特征在于，所述CSI过程索引横跨多个分量载波是唯一的。
26.如权利要求24所述的方法，其特征在于，所述CSI过程索引在每个经配置的分量载波之内是唯一的。
27.如权利要求24所述的方法，其特征在于，当所述分量载波上仅可配置一个CSI过程，或者仅可配置不支持CoMP的传输模式时，所述CSI过程索引等于默认值。
28.如权利要求22所述的方法，其特征在于，进一步包括，将所述UE配置成用于发送按CSI过程索引的升序次序串接的CSI报告，并且对于每个CSI过程索引，当载波聚合经配置时，所述每个CSI过程索引按小区索引的升序次序被串接。
29.如权利要求22所述的方法，其特征在于，进一步包括，用受限制的PMI的集合来配置每个CSI过程，用于报告CSI。
30.如权利要求22所述的方法，其特征在于，进一步包括，通过具有位串的RRC消息来配置非周期性的CSI过程集合，其中，所述位串的每一位对应CSI过程索引，并且指示当接收到对应的触发时是否由所述UE报告CSI。
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