公开(公告)号：US08625450B2

公开(公告)日：2014-01-07

申请号：US13080347

申请日：2011-04-05

申请人： Timo Lunttila ,  Tommi Koivisto ,  Timo Roman ,  Mihai Enescu

发明人： Timo Lunttila ,  Tommi Koivisto ,  Timo Roman ,  Mihai Enescu

IPC分类号： H04L12/26 ,  H04W4/00 ,  G06F11/00

CPC分类号： H04B7/0626 ,  H04B7/0632 ,  H04B7/0639

摘要： In accordance with the exemplary embodiments of the invention there is deriving multiple input-multiple output feedback information using a set of precoding matrices associated with at least one precoding codebook, signaling, in a first plurality of resource elements, channel state information associated with a first precoding matrix indicator of the set of precoding matrices jointly with a transmission rank, and signaling separately, in a second plurality of resource elements, channel state information associated with a second precoding matrix indicator of the set of precoding matrices. In addition, there is receiving signaling in a first plurality of resource elements of channel state information associated with a first precoding matrix indicator of a set of precoding matrices jointly with a transmission rank, receiving signaling separately in a second plurality of resource elements of channel state information associated with a second precoding matrix indicator of the set of precoding matrices, and controlling a downlink multiple input-multiple output transmission in accordance with the received signaling.

摘要翻译： 根据本发明的示例性实施例，使用与至少一个预编码码本相关联的一组预编码矩阵导出多个输入多输出反馈信息，在第一多个资源元素中发信号通知与第一 一组预编码矩阵的预编码矩阵指示符与传输秩联合，并且在第二多个资源元素中分别信令与该组预编码矩阵的第二预编码矩阵指示符相关联的信道状态信息。 此外，在与传输秩联合的一组预编码矩阵的第一预编码矩阵指示符的信道状态信息的第一多个资源元素中接收信令，在信道状态的第二多个资源元素中分别接收信令 与所述一组预编码矩阵的第二预编码矩阵指示符相关联的信息，以及根据所接收的信令来控制下行链路多输入多输出传输。

公开(公告)号：US20130077707A1

公开(公告)日：2013-03-28

申请号：US13246326

申请日：2011-09-27

申请人： Tommi Koivisto ,  Mihai Enescu ,  Timo Roman ,  Karol Schober

发明人： Tommi Koivisto ,  Mihai Enescu ,  Timo Roman ,  Karol Schober

IPC分类号： H04L27/00

CPC分类号： H04B7/024 ,  H04B7/0486 ,  H04B7/0626 ,  H04L5/0035 ,  H04L5/0091

摘要： A method, apparatus and computer program product are provided for reporting low rank feedback information for each transmission point up to a maximum rank per transmission point. In this regard, a method includes determining a transmission rank and a precoding matrix for each of at least two transmission points of a plurality of transmission points. A method also includes determining a joint transmission rank based on at least two of the plurality of transmission points. A method also includes selecting a joint transmission precoding matrix based on the determined precoding matrix for each of the at least two transmission points and the determined joint transmission rank. The method further includes causing channel state information “CSI” to be transmitted to an access point, wherein the CSI describes the selected joint transmission precoding matrix.

摘要翻译： 提供了一种方法，装置和计算机程序产品，用于报告每个传输点的最低等级的每个传输点的低秩反馈信息。 在这方面，一种方法包括确定多个传输点中的至少两个传输点中的每一个的传输秩和预编码矩阵。 一种方法还包括基于多个传输点中的至少两个确定联合传输等级。 一种方法还包括基于为所述至少两个传输点中的每一个确定的预编码矩阵和所确定的联合传输等级来选择联合传输预编码矩阵。 该方法还包括使信道状态信息CSI被发送到接入点，其中CSI描述所选择的联合传输预编码矩阵。

公开(公告)号：US20130058424A1

公开(公告)日：2013-03-07

申请号：US13639094

申请日：2010-04-06

申请人： Mihai Enescu ,  Timo Roman ,  Tommi Koivisto ,  Timo Lunttila ,  Shuang Tan ,  Helka-Liina Määttänen ,  Kari Pietikäinen

发明人： Mihai Enescu ,  Timo Roman ,  Tommi Koivisto ,  Timo Lunttila ,  Shuang Tan ,  Helka-Liina Määttänen ,  Kari Pietikäinen

IPC分类号： H04B7/06

CPC分类号： H04L25/03923 ,  H04B7/0465 ,  H04B7/0469 ,  H04B7/0486 ,  H04L25/03936

摘要： A first precoding matrix W1 is selected from a first codebook comprising sets of rank specific precoding matrices. The first codebook is characterized by there being fewer precoding matrices associated with higher ranks than associated with lower ranks, and characterized by precoding matrices associated with ranks above a certain rank all being diagonal matrices. The selected first precoding matrix W1 is used to select a rank-specific second precoding matrix W2 from a second codebook, such that the selected first and second precoding matrices form a joint precoder specific to a desired rank. The second codebook is characterized by differently sized precoding matrices associated with each of N total ranks, in which N is an integer greater than one. Information on the joint precoder is reported to a network node over an uplink transmission channel.

摘要翻译： 从包括秩特定预编码矩阵的集合的第一码本中选择第一预编码矩阵W1。 第一码本的特征在于，与较低等级相关联的较高等级的预编码矩阵较少，并且其特征在于与一定等级上的等级相关联的预编码矩阵全部为对角矩阵。 所选择的第一预编码矩阵W1用于从第二码本中选择秩特定的第二预编码矩阵W2，使得所选择的第一和第二预编码矩阵形成特定于期望等级的联合预编码器。 第二码本的特征在于与N个总等级中的每一个相关联的不同大小的预编码矩阵，其中N是大于1的整数。 关于联合预编码器的信息通过上行链路传输信道报告给网络节点。

公开(公告)号：US08724572B2

公开(公告)日：2014-05-13

申请号：US13318107

申请日：2010-04-22

申请人： Karol Schober ,  Tommi Koivisto ,  Timo Roman ,  Mihai Enescu ,  Timo Lunttila

发明人： Karol Schober ,  Tommi Koivisto ,  Timo Roman ,  Mihai Enescu ,  Timo Lunttila

IPC分类号： H04W4/00

CPC分类号： H04B7/0663 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/0639 ,  H04B17/24 ,  H04B17/336 ,  H04W52/143 ,  H04W52/241

摘要： In an embodiment, state of a wireless channel on which information is received is measured; the measured state is used to select from a codebook a plurality of N codewords which optimize a predefined measure, and first and second codewords of the plurality are reported which best optimizes and next-best optimizes the predefined measure. If by example the above is done by a user equipment UE, in another embodiment the network receives first and second indications, searches a codebook using the first and second indications to find the first and second codewords; and utilizes them to improve the channel state information, such as by interpolating between them to find an estimate of the channel. In examples the channel is a MIMO channel that is estimated at two or more antenna ports, there are interpolation weights sent with the codeword indications, and the interpolating uses a geodesic algorithm.

摘要翻译： 在一个实施例中，测量其上接收信息的无线信道的状态; 测量状态用于从码本中选择优化预定义度量的多个N个码字，并且报告多个的第一和第二码字，其最佳地优化并且最佳地优化预定义的度量。 如果通过示例，上述是由用户设备UE完成的，在另一个实施例中，网络接收第一和第二指示，使用第一和第二指示搜索码本以找到第一和第二码字; 并且利用它们来改善信道状态信息，例如通过在它们之间进行内插以找到信道的估计。 在示例中，信道是在两个或更多个天线端口处估计的MIMO信道，存在用码字指示发送的内插加权，并且内插使用测地算法。

公开(公告)号：US20130064129A1

公开(公告)日：2013-03-14

申请号：US13698419

申请日：2010-06-02

申请人： Tommi Koivisto ,  Timo Roman ,  Mihai Enescu ,  Shuang Tan ,  Helka-Liina Määttänen

发明人： Tommi Koivisto ,  Timo Roman ,  Mihai Enescu ,  Shuang Tan ,  Helka-Liina Määttänen

IPC分类号： H04W24/00

CPC分类号： H04B7/0621 ,  H04B7/0636 ,  H04B7/065 ,  H04B7/0695

摘要： An apparatus and method for selecting a beam group and a subset of beams in a communication system are disclosed. The method includes: measuring channel state information (CSI) on a downlink from a base station (920); identifying a selected beam group out of a set of beam groups according to a wideband property of the CSI (930); identifying a selected subset of beams in the selected beam group according to at least one subband (940). Wherein the characteristic of the set of beam groups depends on a transmission rank and the number of beams in the selected subset of beams is equal to the transmission rank. The method further includes: generating encoded feedback information identifying the selected beam group and the selected subset of beams for each subband in a double codebook format (950), transmitting the encoded feedback information to the base station. A computer program product comprising the computer program code which is configured to cause the apparatus to implement above operations is also disclosed.

摘要翻译： 公开了一种在通信系统中选择波束组和波束子集的装置和方法。 该方法包括：从基站（920）测量下行链路上的信道状态信息（CSI）; 根据所述CSI（930）的宽带属性从一组波束组中识别所选择的波束组; 根据至少一个子带（940）识别所选择的波束组中的选定的波束子集。 其中波束组的特性取决于传输等级，并且所选择的波束子集中的波束的数量等于传输等级。 该方法还包括：以双码本格式（950）生成识别所选择的波束组和所选择的每个子带子集的编码反馈信息，将编码的反馈信息发送到基站。 还公开了一种计算机程序产品，其包括被配置为使该设备实现上述操作的计算机程序代码。

公开(公告)号：US09088322B2

公开(公告)日：2015-07-21

申请号：US12751588

申请日：2010-03-31

申请人： Tommi Koivisto ,  Mihai Enescu ,  Timo Roman ,  Karol Schober

发明人： Tommi Koivisto ,  Mihai Enescu ,  Timo Roman ,  Karol Schober

IPC分类号： H04B7/216 ,  H04L27/28 ,  H04L27/06 ,  H04B7/04 ,  H04B7/06

CPC分类号： H04B7/0482 ,  H04B7/0465 ,  H04B7/0469 ,  H04B7/0478 ,  H04B7/0639

摘要： A method and apparatus are provided for an apparatus. The apparatus includes at least one memory including computer program code, and at least one processor. The at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to receive an indication of a set of codeword groups to be included in a codebook, and to select a precoding matrix index based on the indicated set of codeword groups in the codebook. The apparatus is also cause to transmit the precoding matrix index to a network node.

摘要翻译： 为装置提供了一种方法和装置。 该装置包括至少一个包括计算机程序代码的存储器和至少一个处理器。 所述至少一个存储器和所述计算机程序代码被配置为与所述至少一个处理器一起使所述设备至少接收要包括在码本中的一组码字组的指示，并且选择预编码矩阵索引 基于码本中指示的码字组集合。 该装置也是将预编码矩阵索引发送到网络节点的原因。

公开(公告)号：US08743992B2

公开(公告)日：2014-06-03

申请号：US13639094

申请日：2010-04-06

申请人： Mihai Enescu ,  Timo Roman ,  Tommi Koivisto ,  Timo Lunttila ,  Shuang Tan ,  Helka-Liina Määttänen ,  Kari Pietikäinen

发明人： Mihai Enescu ,  Timo Roman ,  Tommi Koivisto ,  Timo Lunttila ,  Shuang Tan ,  Helka-Liina Määttänen ,  Kari Pietikäinen

IPC分类号： H04L1/02 ,  H04B7/02

CPC分类号： H04L25/03923 ,  H04B7/0465 ,  H04B7/0469 ,  H04B7/0486 ,  H04L25/03936

摘要： A first precoding matrix W1 is selected from a first codebook comprising sets of rank specific precoding matrices. The first codebook is characterized by there being fewer precoding matrices associated with higher ranks than associated with lower ranks, and characterized by precoding matrices associated with ranks above a certain rank all being diagonal matrices. The selected first precoding matrix W1 is used to select a rank-specific second precoding matrix W2 from a second codebook, such that the selected first and second precoding matrices form a joint precoder specific to a desired rank. The second codebook is characterized by differently sized precoding matrices associated with each of N total ranks, in which N is an integer greater than one. Information on the joint precoder is reported to a network node over an uplink transmission channel.

摘要翻译： 从包括秩特定预编码矩阵的集合的第一码本中选择第一预编码矩阵W1。 第一码本的特征在于，与较低等级相关联的较高等级的预编码矩阵较少，并且其特征在于与一定等级上的等级相关联的预编码矩阵全部为对角矩阵。 所选择的第一预编码矩阵W1用于从第二码本中选择秩特定的第二预编码矩阵W2，使得所选择的第一和第二预编码矩阵形成特定于期望等级的联合预编码器。 第二码本的特征在于与N个总等级中的每一个相关联的不同大小的预编码矩阵，其中N是大于1的整数。 关于联合预编码器的信息通过上行链路传输信道报告给网络节点。

公开(公告)号：US20130010880A1

公开(公告)日：2013-01-10

申请号：US13176169

申请日：2011-07-05

申请人： Tommi Koivisto ,  Mihai Enescu ,  Timo Roman ,  Karol Schober

发明人： Tommi Koivisto ,  Mihai Enescu ,  Timo Roman ,  Karol Schober

IPC分类号： H04L27/00 ,  H03D1/00

CPC分类号： H04B7/065 ,  H04B7/024 ,  H04B7/0465 ,  H04B7/0469 ,  H04B7/0639 ,  H04B7/0665 ,  H04B7/0691 ,  H04B7/10

摘要： There is provided a mechanism providing a flexible feedback framework operating in different scenarios, such as heterogeneous network deployments. Antenna information are sent from a scheduler element to a UE, the antenna information including information indicating a grouping of one or more antenna in closely spaced antenna groups of one or more transmit points. The UE selects at least one of precoding codewords and amplitude weight parameters for each closely spaced antenna group, and determines information related to a sub-band precoder and a transmit point related combiner. The processing results are indicated to the scheduler by means of sending indices related to a wide-band long-term precoder and a sub-band short-term precoder. The scheduler processes these results for determining a joint precoder.

摘要翻译： 提供了一种提供在不同场景中操作的灵活反馈框架的机制，例如异构网络部署。 天线信息从调度器元件发送到UE，天线信息包括指示一个或多个发射点的紧密间隔的天线组中的一个或多个天线的分组的信息。 UE为每个紧密间隔的天线组选择预编码码字和幅度权重参数中的至少一个，并且确定与子带预编码器和发射点相关组合器相关的信息。 处理结果通过发送与宽带长期预编码器和子带短期预编码器相关的索引指示给调度器。 调度器处理这些结果以确定联合预编码器。

公开(公告)号：US08599960B2

公开(公告)日：2013-12-03

申请号：US13246326

申请日：2011-09-27

申请人： Tommi Koivisto ,  Mihai Enescu ,  Timo Roman ,  Karol Schober

发明人： Tommi Koivisto ,  Mihai Enescu ,  Timo Roman ,  Karol Schober

IPC分类号： H04L27/00

CPC分类号： H04B7/024 ,  H04B7/0486 ,  H04B7/0626 ,  H04L5/0035 ,  H04L5/0091

摘要： A method, apparatus and computer program product are provided for reporting low rank feedback information for each transmission point up to a maximum rank per transmission point. In this regard, a method includes determining a transmission rank and a precoding matrix for each of at least two transmission points of a plurality of transmission points. A method also includes determining a joint transmission rank based on at least two of the plurality of transmission points. A method also includes selecting a joint transmission precoding matrix based on the determined precoding matrix for each of the at least two transmission points and the determined joint transmission rank. The method further includes causing channel state information “CSI” to be transmitted to an access point, wherein the CSI describes the selected joint transmission precoding matrix.

摘要翻译： 提供了一种方法，装置和计算机程序产品，用于报告每个传输点的最低等级的每个传输点的低秩反馈信息。 在这方面，一种方法包括确定多个传输点中的至少两个传输点中的每一个的传输秩和预编码矩阵。 一种方法还包括基于多个传输点中的至少两个确定联合传输等级。 一种方法还包括基于为所述至少两个传输点中的每一个确定的预编码矩阵和所确定的联合传输等级来选择联合传输预编码矩阵。 该方法还包括使信道状态信息“CSI”被发送到接入点，其中CSI描述所选择的联合传输预编码矩阵。

公开(公告)号：US20130058285A1

公开(公告)日：2013-03-07

申请号：US13224825

申请日：2011-09-02

申请人： Tommi Koivisto ,  Timo Roman ,  Mihai Enescu

发明人： Tommi Koivisto ,  Timo Roman ,  Mihai Enescu

IPC分类号： H04W4/00

CPC分类号： H04L1/0046 ,  H04L5/0053

摘要： The present invention provides a method, apparatus and a computer program product for spatial hashing for enhanced control channel search spaces. The present invention includes defining a control channel search space for searching for control channel candidates, defining search space locations within the search space, grouping the search space locations into a plurality of subsets of search space locations, associating each subset of search space locations with an antenna port, for each of a plurality of subframes, changing the search space locations from a first subset of search space locations to a second subset of search space locations.

摘要翻译： 本发明提供一种用于增强控制信道搜索空间的空间哈希的方法，装置和计算机程序产品。 本发明包括定义用于搜索控制信道候选的控制信道搜索空间，定义搜索空间内的搜索空间位置，将搜索空间位置分组成多个搜索空间位置子集，将搜索空间位置的每个子集与 天线端口，用于多个子帧中的每一个，将搜索空间位置从搜索空间位置的第一子集改变到搜索空间位置的第二子集。