公开(公告)号：US08977307B2

公开(公告)日：2015-03-10

申请号：US13538784

申请日：2012-06-29

Applicant: Alexei Davydov ,  Gregory V. Morozov ,  Alexander Maltsev ,  Andrey Pudeyev

Inventor： Alexei Davydov ,  Gregory V. Morozov ,  Alexander Maltsev ,  Andrey Pudeyev

IPC: H04B15/00 ,  H04B7/04

CPC classification number: H04B7/0417 ,  H04B7/024 ,  H04B7/0456 ,  H04B7/0632 ,  H04B7/0639 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/442 ,  Y02D70/444

Abstract: Technology for spatial domain beamforming coordination at a low power node (LPN) in a heterogeneous network (HetNet) is disclosed. One method can include the LPN collecting spatial feedback information of macro node interference from a plurality of wireless devices in a LPN cell. The LPN can compile the spatial feedback information into a spatial feedback report. The LPN can send the spatial feedback report from the LPN to a macro node for calculating a beamforming vector to reduce the macro node interference for the plurality of wireless devices in the LPN cell.

Abstract translation: 公开了在异构网络（HetNet）中的低功率节点（LPN）处的空间域波束成形协调技术。 一种方法可以包括LPN收集来自LPN小区中的多个无线设备的宏节点干扰的空间反馈信息。 LPN可以将空间反馈信息编译成空间反馈报告。 LPN可以将空间反馈报告从LPN发送到宏节点，以计算波束形成向量，以减少LPN小区中的多个无线设备的宏节点干扰。

公开(公告)号：US20140204846A1

公开(公告)日：2014-07-24

申请号：US13869541

申请日：2013-04-24

Applicant: Alexander Maltsev ,  Ali S. Sadri ,  Reza Arefi ,  Vadim Sergeyev ,  Alexei Davydov

Inventor： Alexander Maltsev ,  Ali S. Sadri ,  Reza Arefi ,  Vadim Sergeyev ,  Alexei Davydov

IPC: H04B7/04

CPC classification number: H04B7/0617 ,  H04B7/0452 ,  H04B7/1555 ,  H04W92/045 ,  H04W92/10

Abstract: Some demonstrative embodiments include apparatuses, systems and/or methods of wireless backhaul and access communication via a common antenna array. For example, an apparatus may include a wireless communication unit to control an antenna array to form one or more first beams for communicating over one or more access links and to form one or more second beams for communicating over one or more backhaul links, the access links including wireless communication links between a wireless communication node and one or more mobile devices, and the backhaul links including wireless communication links between the wireless node and one or more other wireless communication nodes.

Abstract translation: 一些演示实施例包括经由公共天线阵列的无线回程和接入通信的装置，系统和/或方法。 例如，设备可以包括无线通信单元，以控制天线阵列以形成用于在一个或多个接入链路上通信的一个或多个第一波束，并且形成用于在一个或多个回程链路上进行通信的一个或多个第二波束， 包括无线通信节点和一个或多个移动设备之间的无线通信链路的链路，以及包括无线节点与一个或多个其他无线通信节点之间的无线通信链路的回程链路。

公开(公告)号：US20140198675A1

公开(公告)日：2014-07-17

申请号：US14126599

申请日：2013-09-27

Applicant: Hong He ,  Alexei Davydov ,  Seunghee Han ,  Jong-Kae Fwu ,  Shafi Bashar

Inventor： Hong He ,  Alexei Davydov ,  Seunghee Han ,  Jong-Kae Fwu ,  Shafi Bashar

IPC: H04L5/00 ,  H04W72/04 ,  H04L5/14

CPC classification number: H04L5/0048 ,  H04L5/14 ,  H04L5/1469 ,  H04L27/2613 ,  H04W28/06

Abstract: A user equipment (UE) for time division duplex (TDD) communication through a wireless communication channel has a receiver to receive a channel state information reference signal (CSI-RS) subframe configuration value, a CSI-RS configuration value, and a CSI-RS; and circuitry to determine a subframe index corresponding to a temporal position of a special subframe including the CSI-RS; determine a CSI-RS pattern of one or more orthogonal frequency division modulation (OFDM) resource elements carrying the CSI-RS, the pattern being from among a group of CSI-RS patterns that include OF DM resource elements in OFDM symbols corresponding to a physical downlink control channel (PDCCH) region of a legacy LTE wireless communication channel; control the receiver to receive the special subframe carrying the CSI-RS during the temporal position and at the one or more OFDM resource elements of the CSI-RS pattern; and measure the wireless communication channel based on the CSI-RS.

Abstract translation: 用于通过无线通信信道进行时分双工（TDD）通信的用户设备（UE）具有接收信道状态信息参考信号（CSI-RS）子帧配置值，CSI-RS配置值和CSI- RS; 以及用于确定与包括所述CSI-RS的特殊子帧的时间位置对应的子帧索引的电路; 确定携带CSI-RS的一个或多个正交频分调制（OFDM）资源元素的CSI-RS模式，该模式来自包括对应于物理的OFDM符号的OFDM符号中的OFDM资源元素的一组CSI-RS模式 传统LTE无线通信信道的下行链路控制信道（PDCCH）区域; 控制接收机在时间位置和CSI-RS模式的一个或多个OFDM资源元件处接收承载CSI-RS的特殊子帧; 并基于CSI-RS测量无线通信信道。

公开(公告)号：US20140086221A1

公开(公告)日：2014-03-27

申请号：US13997232

申请日：2012-06-05

Applicant: Alexei Davydov ,  Gregory Morozov ,  Alexander Maltsev ,  Vadim Sergeyev ,  Ilya Bolotin

Inventor： Alexei Davydov ,  Gregory Morozov ,  Alexander Maltsev ,  Vadim Sergeyev ,  Ilya Bolotin

IPC: H04L5/00 ,  H04B7/02

CPC classification number: H04L27/2675 ,  H04B7/024 ,  H04B7/0456 ,  H04B7/0626 ,  H04J3/12 ,  H04J11/00 ,  H04L1/0026 ,  H04L1/0077 ,  H04L1/1812 ,  H04L5/0035 ,  H04L5/0053 ,  H04L5/0055 ,  H04L5/0078 ,  H04L5/14 ,  H04L27/2646 ,  H04L27/2662 ,  H04W4/06 ,  H04W4/70 ,  H04W24/02 ,  H04W52/146 ,  H04W52/242 ,  H04W52/244 ,  H04W52/34 ,  H04W56/0015 ,  H04W68/02 ,  H04W72/02 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/085 ,  H04W72/12 ,  H04W76/11 ,  H04W76/40 ,  H04W84/14 ,  H04W88/02 ,  H04W88/08 ,  Y02D70/00 ,  Y02D70/20

Abstract: Technology for adjusting a receiver timing of a wireless device in a Coordinated MultiPoint (CoMP) system is disclosed. One method can include the wireless device receiving a plurality of node specific reference signals (RSs) from a plurality of cooperating nodes in a coordination set of the CoMP system. The coordination set includes at least two cooperating nodes. The wireless device can estimate a composite received RS timing from a plurality of received RS timings generated from the plurality of node specific RSs. The received RS timings represent timings from the at least two cooperating nodes. The wireless device can adjust the receiver timing based on the composite received RS timing. A node specific RS can include a channel-state information reference signal (CSI-RS).

Abstract translation: 公开了一种用于调整协调多点（CoMP）系统中的无线设备的接收机定时的技术。 一种方法可以包括无线设备从CoMP系统的协调集合中的多个协作节点接收多个节点特定参考信号（RS）。 协调集包括至少两个协作节点。 无线设备可以从从多个节点特定RS生成的多个接收的RS定时估计复合接收的RS定时。 所接收的RS定时表示来自至少两个协作节点的定时。 无线设备可以基于复合接收的RS定时来调整接收机定时。 节点专用RS可以包括信道状态信息参考信号（CSI-RS）。

公开(公告)号：US20140022988A1

公开(公告)日：2014-01-23

申请号：US13706098

申请日：2012-12-05

Applicant: Alexei Davydov ,  Gregory V. Morozov ,  Alexander Maltsev ,  Ilya Bolotin ,  Debdeep Chatterjee

Inventor： Alexei Davydov ,  Gregory V. Morozov ,  Alexander Maltsev ,  Ilya Bolotin ,  Debdeep Chatterjee

IPC: H04W88/02

CPC classification number: H04W88/02 ,  H04B7/024 ,  Y02D70/126

Abstract: User Equipment (UE) and methods for antenna port quasi co-location signaling in coordinated multi-point (CoMP) operations are generally described herein. In some embodiments, one or more downlink channels are at least partially offloaded from a serving Evolved Node-B (eNB) to one or more neighbor eNBs. The UE may receive signaling from the serving eNB to indicate a reference signal of a neighbor eNB to use for estimation of one or more large-scale physical-layer parameters associated with the one or more downlink channels provided by one of more of the neighbor eNB. The UE may estimate the one or more large-scale physical-layer parameters based on receipt of the indicated reference signal from the neighbor and serving eNBs. The UE may also apply the estimated one or more large-scale physical-layer parameters for processing the one or more downlink channels from the neighbor and serving eNBs.

Abstract translation: 用户设备（UE）和协调多点（CoMP）操作中的天线端口准协同定位信令的方法一般在此描述。 在一些实施例中，一个或多个下行链路信道至少部分地从服务演进节点B（eNB）卸载到一个或多个相邻eNB。 UE可以从服务eNB接收信令，以指示相邻eNB的参考信号用于估计与由相邻eNB中的多个邻居eNB之一提供的一个或多个下行链路信道相关联的一个或多个大规模物理层参数 。 UE可以基于来自邻居和服务eNB的指示的参考信号的接收来估计一个或多个大规模物理层参数。 UE还可以应用估计的一个或多个大规模物理层参数来处理来自邻居和服务eNB的一个或多个下行链路信道。

公开(公告)号：US20130336224A1

公开(公告)日：2013-12-19

申请号：US13992917

申请日：2011-12-16

Applicant: Alexei Davydov ,  Alexander Maltsev ,  Kamran Etemad ,  Gregory Morozov ,  Vadim Sergeyev

Inventor： Alexei Davydov ,  Alexander Maltsev ,  Kamran Etemad ,  Gregory Morozov ,  Vadim Sergeyev

IPC: H04W4/02

CPC classification number: H04W52/0251 ,  H04B7/2656 ,  H04L5/001 ,  H04L5/0033 ,  H04W4/02 ,  H04W4/70 ,  H04W8/186 ,  H04W28/0205 ,  H04W72/048 ,  H04W72/0486 ,  H04W88/085

Abstract: Embodiments of a distributed antenna system (DAS) and method for enhanced positioning in a wireless network are generally described herein. In some embodiments, an enhanced Node-B (eNB) operates as part of a DAS that includes one or more nodes having the same cell ID as the eNB. The eNB is to transmit a UE-specific reference signal and configure one or more of the other nodes of the cell to transmit UE-specific reference signals that are distinguishable from each other and from the UE-specific reference signal that is transmitted by the eNB. The eNB may receive location estimate information from user equipment (UE) that is determined at least in part from the UE-specific reference signals. The eNB may also configure the nodes to perform cooperative OFDMA transmission techniques for the UEs operating in the cell.

Abstract translation: 分布式天线系统（DAS）的实施例和用于在无线网络中增强定位的方法在本文中大体上被描述。 在一些实施例中，增强型节点B（eNB）作为DAS的一部分操作，该DAS包括具有与eNB相同的小区ID的一个或多个节点。 eNB将发送UE专用参考信号，并且配置小区的其他节点中的一个或多个以发送可以彼此区分的UE特定参考信号，并且从由eNB发送的UE专用参考信号 。 eNB可以从至少部分地根据UE特定参考信号确定的用户设备（UE）接收位置估计信息。 eNB还可以配置节点以对在小区中操作的UE执行协作OFDMA传输技术。

公开(公告)号：US20130301548A1

公开(公告)日：2013-11-14

申请号：US13730289

申请日：2012-12-28

Applicant: Kamran Etemad ,  Alexei Davydov

Inventor： Kamran Etemad ,  Alexei Davydov

IPC: H04W72/04

CPC classification number: H04W52/0235 ,  H04B1/56 ,  H04B7/024 ,  H04B7/0417 ,  H04B7/0456 ,  H04B7/0473 ,  H04B7/0486 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/0647 ,  H04B7/065 ,  H04B7/26 ,  H04B15/00 ,  H04J3/00 ,  H04J3/1694 ,  H04J3/26 ,  H04L1/0026 ,  H04L1/1803 ,  H04L1/1822 ,  H04L5/0007 ,  H04L5/001 ,  H04L5/0035 ,  H04L5/0053 ,  H04L5/0073 ,  H04L5/0096 ,  H04L5/14 ,  H04L5/1469 ,  H04L27/2627 ,  H04L29/02 ,  H04L69/22 ,  H04L69/324 ,  H04W4/02 ,  H04W4/023 ,  H04W4/06 ,  H04W4/16 ,  H04W4/70 ,  H04W4/90 ,  H04W16/14 ,  H04W24/02 ,  H04W24/10 ,  H04W36/00 ,  H04W36/0055 ,  H04W36/0061 ,  H04W36/0088 ,  H04W36/04 ,  H04W36/16 ,  H04W36/18 ,  H04W36/22 ,  H04W36/30 ,  H04W36/32 ,  H04W48/20 ,  H04W52/0209 ,  H04W52/0212 ,  H04W52/0216 ,  H04W52/0225 ,  H04W52/0229 ,  H04W52/0251 ,  H04W56/00 ,  H04W56/001 ,  H04W72/005 ,  H04W72/02 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/0426 ,  H04W72/044 ,  H04W72/048 ,  H04W72/082 ,  H04W72/085 ,  H04W72/10 ,  H04W72/12 ,  H04W72/1215 ,  H04W72/1226 ,  H04W76/14 ,  H04W76/18 ,  H04W76/27 ,  H04W76/28 ,  H04W88/02 ,  H04W88/06 ,  H04W88/08 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164 ,  Y02D70/166 ,  Y02D70/168 ,  Y02D70/21 ,  Y02D70/22 ,  Y02D70/23 ,  Y02D70/24 ,  Y02D70/40 ,  Y02D70/442 ,  Y02D70/444

Abstract: Embodiments herein describe apparatuses, systems, and methods for signaling to support downlink coordinated multipoint (CoMP) communications with a user equipment (UE) in a wireless communication network. In embodiments, the UE may be configured with a plurality of channel state information (CSI) processes (e.g., via radio resource control (RRC) signaling) to use for providing CSI feedback to an evolved Node B (eNB) to support downlink CoMP communications. The UE may be configured with a plurality of sets of CSI processes. The UE may further receive a downlink control information (DCI) message from the eNB that indicates one of the configured sets of CSI processes on which the UE is to provide CSI feedback to the UE. The UE may generate the CSI feedback for the indicated set of CSI processes, and transmit the CSI feedback to the eNB in a CSI report.

公开(公告)号：US20130286867A1

公开(公告)日：2013-10-31

申请号：US13681315

申请日：2012-11-19

Applicant: Alexei Davydov ,  Gregory Morozov ,  Ilya Bolotin ,  Alexander Maltsev ,  Vadim Sergeyev

Inventor： Alexei Davydov ,  Gregory Morozov ,  Ilya Bolotin ,  Alexander Maltsev ,  Vadim Sergeyev

IPC: H04W24/08

CPC classification number: H04W52/0206 ,  H04B1/1027 ,  H04B7/024 ,  H04B17/345 ,  H04L41/5003 ,  H04L41/5006 ,  H04L41/5009 ,  H04L47/70 ,  H04L47/76 ,  H04L65/80 ,  H04L67/322 ,  H04W16/18 ,  H04W16/24 ,  H04W24/02 ,  H04W24/06 ,  H04W24/08 ,  H04W36/0094 ,  H04W36/08 ,  H04W36/38 ,  H04W52/243 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1226 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/40 ,  Y02D70/442

Abstract: Embodiments of the present disclosure describe techniques and configurations for handling interference measurements in a wireless communication network. An apparatus may include computer-readable media having instructions and processors coupled with the computer-readable media and configured to execute the instructions to identify, for a serving eNB, a neighboring eNB for which signal interference measurements are to be performed by one or more wireless devices served by the serving eNB, and request that the neighboring eNB transmit typical interference signals within data units which are configured for, and may or may not have, a scheduled physical downlink shared channel transmission. The wireless devices may be configured to perform the signal interference measurements based at least in part on the typical interference signals, which may include non-zero-power signals or zero-power signals. Other embodiments may be described and claimed.

Abstract translation: 本公开的实施例描述了用于在无线通信网络中处理干扰测量的技术和配置。 装置可以包括具有与计算机可读介质耦合的指令和处理器的计算机可读介质，并且被配置为执行指令以针对服务eNB识别相邻eNB，对于哪个信号干扰测量将由一个或多个无线 由服务eNB服务的设备，并请求相邻eNB在数据单元内发送典型的干扰信号，该数据单元被配置用于并且可以或不具有调度的物理下行链路共享信道传输。 无线设备可以被配置为至少部分地基于可以包括非零功率信号或零功率信号的典型干扰信号来执行信号干扰测量。 可以描述和要求保护其他实施例。

公开(公告)号：US20130244709A1

公开(公告)日：2013-09-19

申请号：US13628923

申请日：2012-09-27

Applicant: Alexei Davydov ,  Gregory Morozov ,  Alexander Maltsev ,  Vadim Sergeyev ,  Ilya Bolotin

Inventor： Alexei Davydov ,  Gregory Morozov ,  Alexander Maltsev ,  Vadim Sergeyev ,  Ilya Bolotin

IPC: H04B15/00 ,  H04W24/00

CPC classification number: H04L5/1446 ,  H04J11/0073 ,  H04L1/0033 ,  H04L1/1635 ,  H04L1/1812 ,  H04L1/1819 ,  H04L1/1825 ,  H04L1/1854 ,  H04L1/1864 ,  H04L1/1877 ,  H04L1/1887 ,  H04L1/189 ,  H04L1/1896 ,  H04L5/001 ,  H04L5/0053 ,  H04L5/0055 ,  H04L5/0073 ,  H04L5/14 ,  H04L5/1438 ,  H04L5/1469 ,  H04L12/189 ,  H04L12/2854 ,  H04L47/283 ,  H04L65/601 ,  H04L67/02 ,  H04L67/2842 ,  H04N21/25841 ,  H04N21/41407 ,  H04N21/6405 ,  H04N21/6408 ,  H04W4/06 ,  H04W24/00 ,  H04W24/02 ,  H04W28/0236 ,  H04W28/0268 ,  H04W28/0278 ,  H04W52/02 ,  H04W52/0206 ,  H04W52/0209 ,  H04W52/0229 ,  H04W52/0235 ,  H04W52/143 ,  H04W52/243 ,  H04W72/04 ,  H04W72/0406 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/0426 ,  H04W72/0446 ,  H04W72/048 ,  H04W72/082 ,  H04W72/1205 ,  H04W72/1242 ,  H04W72/1268 ,  H04W72/1273 ,  H04W72/1284 ,  H04W74/085 ,  H04W76/27 ,  H04W76/28 ,  Y02D70/00 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/21 ,  Y02D70/22 ,  Y02D70/23 ,  Y02D70/24

Abstract: Technology is discussed for extending frequency and time based approaches, such as Inter-Cell Interference Coordination (ICIC) and enhanced ICIC (eICIC), to interference mitigation for clusters within a Wireless Wide Area Network (WWAN) of transmission points with a common transmission point identity. Multiple transmission power messages correlated to different transmission point characteristics can be configured among multiple transmission points sharing the same transmission point identity. These multiple transmission power messages can be used to coordinate transmissions from adjacent transmission points on differing frequencies. Additionally, new sets of reference signals can be configured to correlate to different transmission point characteristics. These new, correlated reference signals can be used to decouple measurements used to provide feedback to one set of transmission points from reference signals transmitted by another set of transmission points with the same transmission point identity.

Abstract translation: 讨论了技术，用于将基于频率和时间的方法，例如小区间干扰协调（ICIC）和增强型ICIC（eICIC）扩展到具有公共传输点的传输点的无线广域网（WWAN）内的群集的干扰减轻 身份 可以在共享相同传输点标识的多个传输点之间配置与不同传输点特性相关的多个传输功率消息。 这些多个传输功率消息可用于协调来自不同频率上的相邻传输点的传输。 另外，可以将新的参考信号组配置为与不同的传输点特性相关联。 这些新的相关参考信号可以用于将用于从具有相同传输点标识的另一组传输点发送的参考信号提供反馈的测量结果去耦合到一组传输点。

公开(公告)号：US20130194943A1

公开(公告)日：2013-08-01

申请号：US13525509

申请日：2012-06-18

Applicant: Alexei Davydov ,  Gregory Morozov ,  Alexander Maltsev ,  IIya Bolotin ,  Vadim Sergeyev

Inventor： Alexei Davydov ,  Gregory Morozov ,  Alexander Maltsev ,  IIya Bolotin ,  Vadim Sergeyev

IPC: H04W24/10

CPC classification number: H04W72/044 ,  H04B1/69 ,  H04B7/024 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/0617 ,  H04B7/0623 ,  H04B7/0626 ,  H04B7/0639 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/0031 ,  H04L1/1864 ,  H04L1/1887 ,  H04L1/1896 ,  H04L5/0035 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0053 ,  H04L5/1469 ,  H04L12/189 ,  H04L27/2607 ,  H04L65/4076 ,  H04L65/608 ,  H04W4/08 ,  H04W4/70 ,  H04W36/0094 ,  H04W36/04 ,  H04W48/16 ,  H04W52/0216 ,  H04W72/04 ,  H04W72/0406 ,  H04W72/042 ,  H04W72/0493 ,  H04W72/082 ,  H04W72/085 ,  H04W76/27 ,  H04W76/28 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164 ,  Y02D70/166 ,  Y02D70/168 ,  Y02D70/21 ,  Y02D70/22 ,  Y02D70/23 ,  Y02D70/24 ,  Y02D70/442 ,  Y02D70/444

Abstract: An evolved Node B (eNB) and method for coherent coordinated multipoint transmission with per CSI-RS feedback are generally described herein. The eNB may configure a first cooperating point and a second cooperating point to jointly transmit a multi-node channel-state information (CSI) reference signal (RS) (CSI-RS) in predetermined resource elements of a resource block. The eNB may receive CSI reports as feedback from user equipment (UE). The CSI reports may include a precoding matrix indicator (PMI) indicating relative phase information between the cooperating points based on the multi-node CSI-RS. The CSI reports for the multi-node CSI-RS may be restricted to a PMI of rank-1. The eNB may configure the cooperating points for a coherent joint transmission to the UE based at least on the relative phase information. The coherent joint transmission may also be jointly beamformed based on single-node PMIs.

Abstract translation: 这里一般地描述了用于每个CSI-RS反馈的相干协调多点传输的演进节点B（eNB）和方法。 eNB可以配置第一协作点和第二协作点以在资源块的预定资源元素中联合发送多节点信道状态信息（CSI）参考信号（CSI）参考信号（CSI）。 eNB可以从用户设备（UE）接收作为反馈的CSI报告。 CSI报告可以包括基于多节点CSI-RS指示协作点之间的相对相位信息的预编码矩阵指示符（PMI）。 针对多节点CSI-RS的CSI报告可能被限制在等级-1的PMI。 eNB可以至少基于相对相位信息来配置用于向UE的相干联合传输的协作点。 相干联合传输也可以基于单节点PMI联合波束形成。