WO2010034189A1

WO2010034189A1 - Cooperative multi-point transmission system and method

Info

Publication number: WO2010034189A1
Application number: PCT/CN2009/070432
Authority: WO
Inventors: 孙云锋; 姜静; 赵楠; 张颖光; 毕峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2008-09-24
Filing date: 2009-02-13
Publication date: 2010-04-01
Also published as: CN101686080A

Abstract

A cooperative multi-point transmission system and method are provided. The method includes that in the cooperative multi-point transmission, each cooperative node participated in the cooperation performs pilot mapping and data mapping respectively according to the characteristics of the antenna port of the service node where the target terminal of the cooperation is located. Then the mapped information is sent from the cooperative node to the target terminal. The system includes one or more cooperative nodes and service nodes. The cooperative node performs pilot mapping and data mapping according to the characteristics of the antenna port of the service node where the target terminal of the cooperation is located. The mapped data is sent from the cooperative node to the target terminal.

Description

一种多点协作传输***及方法 Multi-point coordinated transmission system and method

技术领域 Technical field

本发明涉及无线通信领域，尤其涉及一种多点协作传输***及方法。 The present invention relates to the field of wireless communications, and in particular, to a multipoint coordinated transmission system and method.

背景技术 Background technique

为了提供高的吞吐率同时解决小区间的干扰问题，新一代无线通信***，如演进的长期演进*** ( Long-Term Evolution advance, LTE- Advance ) , 超 3G 技术 (又称为 International Mobile Telecommunication advance , 简称 IMT-Advance ) 等，考虑引入网络级间的协作 MIMO ( Multiple-Input Multiple-Out-put, 多输入多输出技术）。 In order to provide high throughput and solve inter-cell interference problems, a new generation of wireless communication systems, such as Long-Term Evolution advance (LTE-Advance) and Super 3G technology (also known as International Mobile Telecommunication advance, Referred to as IMT-Advance, etc., consider the introduction of cooperative MIMO (Multiple Input Multiple Output Multiple Output) between networks.

目前 LTE 中对小区边缘处干扰的处理主要有以下三种方法： 1、干扰随机化； 2、干扰消除； 3、干扰协调（躱避）。干扰随机化的方法一般釆用跳频，跳时，直扩或者跳码的方法在小区之间减轻干扰的影响，它的优点是无需网络规划，几乎不需要信令的支持，但是只能说减轻了干扰，并没有从根本上消除；干扰消除的方法虽然能使用某些算法消除干扰，但是一般需要额外的物理实体，如多天线技术等，才能完成干扰的比较好的消除，有时这些条件可能并不满足；最后一大类干扰协调（躱避）的方法是通过交换小区间的一些信息，使用某些算法使得每个小区自动根据其他小区的反馈信息和自身的情况选择合适的资源进行传输，从而实现小区间资源的高效利用，而尽量减轻小区间资源碰撞利用的机会，最终达到小区边缘性能的提升，其强调尽量避免出现小区间争用相同时频资源从而造成干扰。 At present, there are three main methods for handling interference at the edge of a cell in LTE: 1. Interference interference; 2. Interference cancellation; 3. Interference coordination (avoidance). The method of interference randomization generally uses frequency hopping, time hopping, direct spreading or code hopping to mitigate the influence of interference between cells. Its advantage is that no network planning is required, and almost no signaling support is needed, but only The interference is mitigated and not completely eliminated. Although the method of interference cancellation can use some algorithms to eliminate interference, it usually requires additional physical entities, such as multi-antenna technology, to complete the better elimination of interference. Sometimes these conditions It may not be satisfied; the last major method of interference coordination (avoidance) is to exchange some information between cells, and use some algorithms to make each cell automatically select appropriate resources according to the feedback information of other cells and its own situation. Transmission, so as to achieve efficient use of inter-cell resources, and minimize the opportunity for resource collision and utilization between cells, and finally achieve the improvement of cell edge performance, which emphasizes avoiding inter-cell contention for the same time-frequency resources and causing interference.

由于小区边缘用户距离多个相邻小区的天线距离相差不大，因此利用多个小区的发射天线协作来实现小区边缘处无线链路的较高容量和可靠传输可以完全消除小区边缘处的用户造成的干扰问题。在 LTE-A中，已经正式将多点协作传输 ( CoMP: Cooperative Multi-Point Transmission )技术作为一种备选技术进行研究。多点协作传输技术特点在于： Since the cell edge users have little difference in antenna distance from multiple neighboring cells, using the transmit antennas of multiple cells to achieve higher capacity and reliable transmission of the radio link at the cell edge can completely eliminate the user at the cell edge. Interference problem. In LTE-A, CoMP (Cooperative Multi-Point Transmission) technology has been formally studied as an alternative technology. The characteristics of multi-point cooperative transmission technology are:

( 1 )通过多个基站 BS在相同的无线资源上的协作，共同为一个移动台 MS服务。 (1) cooperating as a mobile station by cooperation of multiple base stations BS on the same radio resource MS service.

( 2 )每个 BS在相同的无线资源上可以同时为一个或多个 MS服务。目前各家公司在 CoMP方面分别以 LTE为基础提出了各自的观点。在当前 LTE中，小区内的天线端口主要分为 cell-specific(小区特定）的 antenna port 0-3 (天线端口 0~3 ) 。 MBMS ( Multimedia Broadcast Multicast Service, 多媒体广播多播）业务专用的 antenna port 4 ,以及 user-specific(用户特定）的 antenna port5。在当前各家公司提出的观点中，主要讨论的是多天线算法相关的方案设计，其中包括 Alcatel-Lucent公司提出的基于零限的上行协作 MIMO, 基于波束成型的协作 MIMO。 Errison公司提出的基于 LTE兼容性的三种理念： a) CoMP 中既不进行任何下行控制信令的通知，也不进行任何与 CoMP相关的反馈； b) CoMP 中不进行任何 CoMP相关的下行控制信令通知，只进行上行的 CoMP相关的下行信道的测量报告。 c) 目标 UE (终端 ) 不仅进行 CoMP 相关的下行信令通知，同时 UE需要进行 CoMP相关的下行信道信息的上行反馈，同时提到协作过程中，协作小区在天线端口 5协作的理念。 (2) Each BS can serve one or more MSs simultaneously on the same radio resource. At present, each company has put forward their own views on the basis of LTE based on CoMP. In the current LTE, the antenna ports in the cell are mainly divided into cell-specific (cell-specific) antenna port 0-3 (antenna port 0~3). The antenna port 4 dedicated to the MBMS (Multimedia Broadcast Multicast Service) service and the antenna port 5 of the user-specific (user-specific). Among the current viewpoints of various companies, the main discussion is the design of multi-antenna algorithm-related schemes, including Alcatel-Lucent's zero-based uplink cooperative MIMO and beamforming-based cooperative MIMO. Errison's three concepts based on LTE compatibility: a) CoMP does not perform any notification of downlink control signaling, nor does it perform any CoMP-related feedback; b) Does not perform any CoMP-related downlink control in CoMP Signaling notification, only the uplink CoMP-related downlink channel measurement report is performed. c) The target UE (terminal) not only performs CoMP-related downlink signaling notification, but also needs to perform uplink feedback of CoMP-related downlink channel information, and mentions the concept that the coordinated cell cooperates at the antenna port 5 in the cooperation process.

但是上述方案主要基于各个协作节点的导频正交的情况下考虑的协作方法。如果导频完全正交，则用来为所述目标 UE传输数据的资源将大大减少，而如果通过码分的方式保持正交，则所述目标 UE需要通过十分复杂的信道估计算法才能获得各个协作节点的信道信息并进行反馈，如图 1所示。由图 1 可见， LTE 中，不同小区的导频是通过频率的偏移相互避开的。但同时，小区 ID = 1的小区的数据位置会和小区 ID = 2的导频位置冲突，因此如果釆用非完全正交的方式，则对于小区边缘的用户来讲，导频和数据之间的冲突会影响信道估计的精度和数据检测的性能。而如果通过消除算法避免干扰，则算法复杂度会很高，尤其是多个小区协作场景中。对于功率受限的终端来讲，这无疑不是一种好的设计方法。 However, the above scheme is mainly based on a cooperative method considered in the case where the pilots of the respective cooperative nodes are orthogonal. If the pilots are completely orthogonal, the resources used to transmit data for the target UE will be greatly reduced, and if the orthogonality is maintained by means of code division, the target UE needs to obtain each through a very complicated channel estimation algorithm. Coordinate node channel information and feedback, as shown in Figure 1. As can be seen from Figure 1, in LTE, pilots of different cells are avoided by frequency offset. At the same time, the data location of the cell with cell ID = 1 will conflict with the pilot location of cell ID = 2, so if the cell is not completely orthogonal, then for the user at the cell edge, between the pilot and the data The conflict will affect the accuracy of channel estimation and the performance of data detection. However, if the interference is avoided by the elimination algorithm, the complexity of the algorithm may be high, especially in a plurality of cell cooperation scenarios. For power-constrained terminals, this is certainly not a good design approach.

另一种方式是新定义一个 user-specific的天线端口，所有的节点在协作的情况下，都按照该端口上的导频模式***导频，实现空口合并，但这种情况会引入导频干扰，如图 2所示。图 2中，假设 A和 D分别为不同协作域中的服务小区，当 A和 D在相同资源内进行对不同的 UE进行协作时，且选择的协作节点分别为 A B C和 D E F时，由于所有的节点都釆用相同的端口，且釆用相同的导频映射方式，则节点 E的导频会对 A B C协作域的信道估计带来干扰。解决的方法是小区之间进行大量的信息交互，通知周围节点本节点的资源使用情况，且不仅需要通知本节点临近周围节点，而且需要直接或者间接的通知更外层小区，但这会大大增加信令的交互量。 Another way is to newly define a user-specific antenna port. All nodes cooperate to insert pilots according to the pilot pattern on the port to implement air interface merging. However, this situation introduces pilot interference. , as shown in picture 2. In FIG. 2, it is assumed that A and D are respectively serving cells in different cooperation domains. When A and D cooperate in different resources in the same resource, and the selected cooperative nodes are ABC and DEF respectively, due to all Nodes use the same port, and If the same pilot mapping method is used, the pilot of the node E will interfere with the channel estimation of the ABC cooperative domain. The solution is to perform a large amount of information interaction between cells, notify the surrounding nodes of the resource usage of the node, and not only need to notify the neighboring node to neighboring nodes, but also need to directly or indirectly notify the outer layer cell, but this will greatly increase The amount of signaling interaction.

发明内容 Summary of the invention

本发明要解决的技术问题是针对上述方法存在的缺陷，同时考虑了*** 得向上兼容问题，提供一种多点协作传输***及方法，使 UE可以通过简单的空口合并，即可获得空间增益，同时避免小区边缘用户的干扰问题。 The technical problem to be solved by the present invention is to address the shortcomings of the above methods, and consider the problem of upward compatibility of the system, and provide a multi-point cooperative transmission system and method, so that the UE can obtain spatial gain through simple air interface merging. At the same time, avoid interference problems of users at the edge of the cell.

本发明釆用的技术方案是，一种多点协作传输方法，包括： The technical solution adopted by the present invention is a multi-point cooperative transmission method, including:

标终端所在服务节点的天线端口特性进行导频映射和数据映射，之后在本协作节点发送映射后的信息给所述目标终端。 The antenna port characteristics of the serving node where the target terminal is located are subjected to pilot mapping and data mapping, and then the mapped information is sent to the target terminal at the cooperation node.

进一步地，各协作节点分别按照所述目标终端所在服务节点的天线端口特性进行导频映射和数据映射是指： Further, the pilot mapping and data mapping of each of the cooperative nodes according to the antenna port characteristics of the serving node where the target terminal is located refers to:

各协作节点分别按照所述目标终端所在服务节点的小区特定的天线端口的端口特性进行导频映射和数据映射；或 Each of the cooperative nodes performs pilot mapping and data mapping according to the port characteristics of the cell-specific antenna port of the serving node where the target terminal is located; or

各协作节点分别按照所述目标终端所在服务节点的用户特定的天线端口的端口特性进行导频映射和数据映射。 Each of the cooperative nodes performs pilot mapping and data mapping according to the port characteristics of the user-specific antenna port of the serving node where the target terminal is located.

进一步地，各协作节点分别按照所述目标终端所在服务节点的小区特定的天线端口的端口特性进行导频映射和数据映射具体是指： Further, each of the cooperative nodes performs pilot mapping and data mapping according to the port characteristics of the cell-specific antenna port of the serving node where the target terminal is located, specifically:

当目标终端所在的服务节点仅存在一个小区特定的天线端口时，所有协作节点都按照该小区特定的天线端口的端口特性进行导频映射和数据映射；当目标终端所在的服务节点存在多个小区特定的天线端口时，多个协作节点分别按照不同的小区特定的天线端口的端口特性进行导频映射和数据映射，或将多个协作节点分组，不同协作节点分组分别按照不同的小区特定的天线端口的端口特性进行导频映射和数据映射。 When there is only one cell-specific antenna port in the serving node where the target terminal is located, all the cooperative nodes perform pilot mapping and data mapping according to the port characteristics of the specific antenna port of the cell; when there are multiple cells in the serving node where the target terminal is located When a specific antenna port is used, multiple cooperative nodes respectively perform pilot mapping and data mapping according to port characteristics of different cell-specific antenna ports, or group multiple cooperative nodes, and different cooperative node packets are respectively according to different cell-specific antennas. The port characteristics of the port are used for pilot mapping and data mapping.

进一步地，当目标终端所在的服务节点存在多个小区特定的天线端口，并且多个协作节点分别按照不同小区特定的天线端口的端口特性进行导频映射和数据映射时，将数据和导频以波束赋形的形式进行发送。 Further, when there are multiple cell-specific antenna ports in the serving node where the target terminal is located, And when the plurality of cooperative nodes respectively perform pilot mapping and data mapping according to port characteristics of antenna ports specific to different cells, the data and the pilot are transmitted in the form of beamforming.

进一步地，各协作节点分别按照所述目标终端所在服务节点的用户特定的天线端口的端口特性进行导频映射和数据映射具体是指： Further, each of the cooperative nodes performs pilot mapping and data mapping according to the port characteristics of the user-specific antenna port of the serving node where the target terminal is located, specifically:

当目标终端所在的服务节点仅存在一个用户特定的天线端口时，所有协作节点都按照该用户特定的天线端口的端口特性进行导频映射和数据映射；当目标终端所在的服务节点存在多个用户特定的天线端口时，多个协作节点分别按照不同的用户特定的天线端口的端口特性进行导频映射和数据映端口的端口特性进行导频映射和数据映射。 When there is only one user-specific antenna port in the service node where the target terminal is located, all the cooperative nodes perform pilot mapping and data mapping according to the port characteristics of the specific antenna port of the user; when there are multiple users in the service node where the target terminal is located For a specific antenna port, multiple cooperative nodes perform pilot mapping and data mapping for pilot mapping and port characteristics of the data mapping port according to port characteristics of different user-specific antenna ports.

进一步地，各协作节点按照目标终端所在服务节点中所述的天线端口特性进行导频映射具体是指： Further, the pilot mapping performed by each coordinated node according to the antenna port characteristics described in the serving node where the target terminal is located specifically refers to:

各协作节点计算所映射到的天线端口的导频位置和导频序列，之后根据所计算出的导频位置和导频序列***导频；或 Each cooperating node calculates a pilot position and a pilot sequence of the mapped antenna port, and then inserts a pilot according to the calculated pilot position and pilot sequence; or

各协作节点计算所映射到的天线端口的导频位置和导频序列，之后对所述导频序列进行线性变换，最后在导频位置***线性变换后的导频序列。 Each cooperating node calculates a pilot position and a pilot sequence of the mapped antenna port, then linearly transforms the pilot sequence, and finally inserts a linearly transformed pilot sequence at the pilot position.

进一步地，线性变换方式为循环延迟分集，或相位旋转分集。 Further, the linear transformation mode is cyclic delay diversity, or phase rotation diversity.

进一步地，各协作节点在数据映射时对数据进行与导频同样的线性变换。进一步地，所述方法还包括：设定一个大于 1的门限，仅当一协作节点的功率与服务节点的功率的比值大于或等于该门限时，允许目标终端进行服务小区的切换。 Further, each of the cooperative nodes performs the same linear transformation on the data as the pilot at the time of data mapping. Further, the method further includes: setting a threshold greater than 1, and allowing the target terminal to perform handover of the serving cell only when the ratio of the power of the coordinated node to the power of the serving node is greater than or equal to the threshold.

本发明还提供一种多点协作传输***，包括：一个或多个协作节点及服务节点； The present invention also provides a multipoint coordinated transmission system, including: one or more collaboration nodes and service nodes;

所述协作节点用于按照本次协作中目标终端所在服务节点的天线端口特性进行导频映射和数据映射，以及在本协作节点向目标终端发送映射后的信息。 The cooperation node is configured to perform pilot mapping and data mapping according to the antenna port characteristics of the serving node where the target terminal is located in the current cooperation, and send the mapped information to the target terminal in the collaboration node.

进一步地，所述各协作节点按照目标终端所在服务节点的天线端口特性进行导频映射和数据映射是指：各协作节点分别按照所述目标终端所在服务节点的小区特定的天线端口的端口特性进行导频映射和数据映射；或 Further, the pilot mapping and data mapping performed by each coordinated node according to the antenna port characteristics of the serving node where the target terminal is located refers to: Each of the cooperative nodes performs pilot mapping and data mapping according to the port characteristics of the cell-specific antenna port of the serving node where the target terminal is located; or

进一步地，所述各协作节点分别按照目标终端所在服务节点的小区特定的天线端口的端口特性进行导频映射和数据映射具体是指： Further, the pilot mapping and data mapping of each of the cooperative nodes according to the port characteristics of the cell-specific antenna port of the serving node where the target terminal is located specifically refers to:

进一步地，所述各协作节点分别按照目标终端所在服务节点的用户特定的天线端口的端口特性进行导频映射和数据映射具体是指： Further, the pilot mapping and data mapping of each of the cooperative nodes according to the port characteristics of the user-specific antenna port of the serving node where the target terminal is located specifically refers to:

各协作节点计算所映射到的天线端口的导频位置和导频序列，并根据所计算出的导频位置和导频序列***导频；或 Each cooperating node calculates a pilot position and a pilot sequence of the mapped antenna port, and inserts a pilot according to the calculated pilot position and pilot sequence; or

各协作节点计算所映射到的天线端口的导频位置和导频序列，以及对所述导频序列进行线性变换，并在导频位置***线性变换后的导频序列。 Each cooperating node calculates a pilot position and a pilot sequence of the mapped antenna port, and linearly transforms the pilot sequence, and inserts a linearly transformed pilot sequence at the pilot position.

本发明的技术方案可以使 UE通过简单的空口合并即可获得性能增益。而且通过根据服务小区的天线端口进行导频和数据的映射，可以避免导频冲突问题，同时避免了 UE的计算复杂度过高的问题。各个协作节点内的普通 UE可以在全带宽内进行信道估计和信道测量。 The technical solution of the present invention can enable the UE to obtain performance gain through simple air interface combining. Moreover, the pilot can be avoided by mapping the pilot and the data according to the antenna port of the serving cell. The problem is highlighted, and the problem of excessive computational complexity of the UE is avoided. A normal UE within each coordinated node can perform channel estimation and channel measurement in full bandwidth.

附图概述 BRIEF abstract

图 1 ( a ) 、（b )为 LTE中相邻小区的导频图样示意图； Figure 1 (a) and (b) are schematic diagrams of pilot patterns of neighboring cells in LTE;

图 2为所有协作小区按相同天线端口特性处理时带来的干扰的示意图；图 3为以 LTE 为例对应于发明对应的一个示意图； 2 is a schematic diagram of interference caused when all coordinated cells are processed according to the same antenna port characteristics; FIG. 3 is a schematic diagram corresponding to the invention corresponding to LTE;

图 4为本发明中协作节点按固定模式映射到多个天线端口时的示意图；图 5为本发明的应用示例一的具体实施流程示意图； 4 is a schematic diagram of a cooperative node mapping to a plurality of antenna ports in a fixed mode according to the present invention; FIG. 5 is a schematic diagram of a specific implementation process of an application example 1 of the present invention;

图 6为应用示例一中协作节点按照服务节点 user-specific天线端口映射的示意图； 6 is a schematic diagram of mapping of a cooperative node according to a service node user-specific antenna port in Application Example 1;

图 7为应用示例二中协作节点按照服务节点 cell-specific天线端口映射的示意图。本发明的较佳实施方式 FIG. 7 is a schematic diagram of a cooperation node according to a service node cell-specific antenna port mapping in the application example 2. Preferred embodiment of the invention

下面将结合附图及实施例对本发明的技术方案进行更详细的说明。 The technical solution of the present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

本发明针对上述现有方案存在的问题，同时考虑***的前向兼容特性，提供了一种多点协作传输***及方法，尤其适用于 LTE-A***中的小区间协作 MIMO方式下的多点协作传输。 The present invention provides a multi-point coordinated transmission system and method, and is applicable to multiple points in an inter-cell cooperative MIMO mode in an LTE-A system, in consideration of the problems existing in the above existing solutions, and considering the forward compatibility characteristics of the system. Collaborative transfer.

本发明提供的多点协作传输***，包括网络侧、服务节点、一个或多个协作节点及目标 UE; The multi-point coordinated transmission system provided by the present invention includes a network side, a service node, one or more cooperation nodes, and a target UE;

网络侧用于为目标 UE选择协作节点；可以是根据测量信息，同时结合邻近节点的资源分配及其负载情况选择协作节点；具体方法同现有技术。网络侧还用于通知各协作节点，本次协作中目标 UE所在的服务节点的小区标识；其中网络侧用于为目标 UE选择协作节点的网元可以放在服务节点中。 The network side is used to select a collaboration node for the target UE; the cooperative node may be selected according to the measurement information and the resource allocation of the neighboring node and the load condition thereof; the specific method is the same as the prior art. The network side is also used to notify each cooperating node of the cell identity of the serving node where the target UE is located in the current cooperation; wherein the network element used by the network side to select the cooperating node for the target UE can be placed in the serving node.

各协作节点用于收到 UE所在的服务节点的小区标识后，按照本次协作中目标 UE所在服务节点的天线端口特性进行导频映射和数据映射；具体如下： After receiving the cell identifier of the serving node where the UE is located, each coordinated node performs pilot mapping and data mapping according to the antenna port characteristics of the serving node where the target UE is located in the current cooperation; Next:

各协作节点可以分别按照本次协作中目标 UE 所在的服务节点的 cell-specific (小区特定 ) 的天线端口的端口特性进行导频映射和数据映射；各协作节点也可以分另 ll按照本次协作中目标 UE所在服务节点的 user-specific (用户特定 ) 的天线端口的端口特性进行导频映射和数据映射。 Each of the cooperative nodes may perform pilot mapping and data mapping according to the port characteristics of the cell-specific (cell-specific) antenna port of the serving node where the target UE is located in the current cooperation; each collaboration node may also separately collaborate according to this collaboration. The port characteristics of the user-specific (user-specific) antenna port of the serving node where the target UE is located are subjected to pilot mapping and data mapping.

各协作节点分别按照目标 UE所在服务节点的 cell-specific的天线端口的端口特性进行导频映射和数据映射具体是指： The pilot mapping and data mapping of each of the cooperative nodes according to the port characteristics of the cell-specific antenna port of the serving node where the target UE is located specifically refers to:

当目标 UE所在的服务节点仅存在一个 cell-specific的天线端口时，所有协作节点都按照该 cell-specific的天线端口的端口特性进行导频映射和数据映射；当目标 UE所在的服务节点存在多个 cell-specific的天线端口时，多个协作节点分别按照不同的 cell-specific的天线端口的端口特性进行导频映射和数据映射，或将多个协作节点分组，不同协作节点分组分别按照不同的 cell-specific的天线端口的端口特性进行导频映射和数据映射。 When there is only one cell-specific antenna port in the serving node where the target UE is located, all the cooperative nodes perform pilot mapping and data mapping according to the port characteristics of the cell-specific antenna port; when there are many service nodes where the target UE is located When a cell-specific antenna port is used, multiple cooperative nodes perform pilot mapping and data mapping according to port characteristics of different cell-specific antenna ports, or group multiple cooperative nodes, and different cooperative nodes are grouped according to different The port characteristics of the cell-specific antenna port are used for pilot mapping and data mapping.

各协作节点分别按照目标 UE所在服务节点的 user-specific的天线端口的端口特性进行导频映射和数据映射具体是指： The pilot mapping and data mapping of each of the cooperative nodes according to the port characteristics of the user-specific antenna port of the serving node where the target UE is located specifically refers to:

当目标 UE所在的服务节点仅存在一个 user-specific的天线端口时，所有协作节点都按照该 user-specific 的天线端口的端口特性进行导频映射和数据映射；当目标 UE所在的服务节点存在多个 user-specific的天线端口时，多个协作节点分别按照不同的 user-specific 的天线端口的端口特性进行导频映射和数据映射，或将协作节点分组，不同协作节点分组分别按照不同的 user-specific的天线端口的端口特性进行导频映射和数据映射。 When there is only one user-specific antenna port in the serving node where the target UE is located, all the cooperative nodes perform pilot mapping and data mapping according to the port characteristics of the user-specific antenna port; when there are many service nodes where the target UE is located When a user-specific antenna port is used, multiple cooperative nodes perform pilot mapping and data mapping according to port characteristics of different user-specific antenna ports, or group cooperative nodes, and different cooperative nodes are grouped according to different user- The port characteristics of the specific antenna port are used for pilot mapping and data mapping.

各协作节点按照目标 UE所在服务节点中的天线端口特性进行导频映射具体是指： Each of the cooperative nodes performs pilot mapping according to the characteristics of the antenna port in the serving node where the target UE is located. Specifically, it refers to:

各协作节点计算所映射到的天线端口的导频位置和导频序列，并根据所计算出的导频位置和导频序列***导频；或各协作节点计算所映射到的天线端口的导频位置和导频序列，以及对导频序列进行线性变换，并在导频位置 ***线性变换后的导频序列。 Each coordinated node calculates a pilot position and a pilot sequence of the mapped antenna port, and inserts a pilot according to the calculated pilot position and pilot sequence; or each coordinated node calculates a pilot of the mapped antenna port The position and pilot sequences, and the pilot sequence are linearly transformed, and the linearly transformed pilot sequence is inserted at the pilot position.

各协作节点还可以用于在数据映射时对数据进行与导频同样的线性变换。 Each collaboration node can also be used to perform the same linear transformation of the data as the pilot during data mapping. Change.

各协作节点还用于将映射后的信息（该映射后的信息映射后的包括映射后的数据及导频）在本协作节点发送给目标 UE。 Each coordinated node is further configured to send the mapped information (including the mapped data and pilots after the mapped information is mapped) to the target UE in the coordinated node.

服务节点用于按照本节点的天线端口特性进行导频映射和数据映射，以及在本节点的天线上向目标 UE发送映射后的信息（该映射后的信息包括映射后的数据及导频）。具体操作同现有技术。 The serving node is configured to perform pilot mapping and data mapping according to the antenna port characteristics of the node, and send the mapped information to the target UE on the antenna of the node (the mapped information includes the mapped data and the pilot). The specific operation is the same as the prior art.

本发明所提供的多点协作传输方法包括：标 UE所在服务节点的天线端口特性进行导频映射和数据映射，映射后在本协作节点发送给目标 UE。 The multi-point coordinated transmission method provided by the present invention includes: performing pilot mapping and data mapping on the antenna port characteristics of the serving node where the UE is located, and mapping and transmitting to the target UE at the cooperative node.

其中，所述的协作节点在一次 CoMP传输中，用于辅助目标 UE所在的服务节点，共同为目标 UE服务；也就是说，通过该目标 UE的服务节点及各协作节点在相同的无线资源上的协作，共同为目标 UE发送信号。网络侧可以根据测量信息，同时结合邻近节点的资源分配及其负载情况选择协作节点；可以按照目前存在的各方式进行选择。 The cooperative node is used to assist the serving node where the target UE is located in the primary CoMP transmission, and serves the target UE together; that is, the serving node and each coordinated node of the target UE are on the same radio resource. Collaboration, jointly sending signals to the target UE. The network side can select the cooperative node according to the measurement information and the resource allocation of the neighboring node and its load condition; the selection can be performed according to the existing existing modes.

其中，所述天线端口特性包括天线端口对应的导频图样，导频序列，数据的映射方法及其相关的信息等。 The antenna port characteristics include a pilot pattern corresponding to the antenna port, a pilot sequence, a data mapping method, and related information.

可选的，各协作节点可以分别按照本次协作中目标 UE所在的服务节点的 cell-specific (小区特定 )的天线端口的端口特性进行导频映射和数据映射；各协作节点也可以分另 ll按照本次协作中目标 UE所在服务节点的 user-specific (用户特定）的天线端口的端口特性进行导频映射和数据映射。实际应用中，各协作节点不限于按照以上两种天线端口特性进行映射。 Optionally, each coordinated node may perform pilot mapping and data mapping according to the port characteristics of the cell-specific antenna of the serving node where the target UE is located in the current cooperation; each coordinated node may also be separated. The pilot mapping and data mapping are performed according to the port characteristics of the user-specific (user-specific) antenna port of the serving node where the target UE is located in this collaboration. In practical applications, each cooperative node is not limited to mapping according to the above two antenna port characteristics.

可选的，各协作节点分别按照所述目标 UE所在服务节点的 cell-specific 天线端口的端口特性进行导频映射和数据映射具体可以是指： Optionally, performing pilot mapping and data mapping according to the port characteristics of the cell-specific antenna port of the serving node where the target UE is located may be:

当目标 UE所在的服务节点仅仅存在一个 cell-specific的天线端口时，所有的协作节点可以都按照该 cell-specific天线端口的端口特性进行导频映射和数据映射； When only one cell-specific antenna port exists in the serving node where the target UE is located, all the cooperative nodes may perform pilot mapping according to the port characteristics of the cell-specific antenna port. Data mapping

当目标 UE所在的服务节点存在多个 cell-specific的天线端口时，多个协作节点可以分别按照不同 cell-specific的天线端口的端口特性进行导频映射和数据映射，即协作节点与 cell-specific的天线端口——对应进行映射，此时优选的，可以将数据和导频以波束赋型 beamforming 的形式进行映射；多个协作节点也可以分组，不同协作节点分组分别按照不同 cell-specific的天线端口的端口特性进行导频映射和数据映射，即多个协作节点与一个 cell-specific的天线端口对应进行映射；也就是说，一个 cell-specific的天线端口可以对应一个协作节点，也可以对应多个协作节点。协作节点按照哪个天线端口进行导频映射和数据映射可以是网络侧动态指定，也可以按照固定规则或约定的规则指定，比如按节点 ID的奇偶来分组。 When there are multiple cell-specific antenna ports in the serving node where the target UE is located, multiple cooperative nodes may perform pilot mapping and data mapping according to the port characteristics of different cell-specific antenna ports, that is, the cooperative node and the cell-specific Antenna port—corresponding to mapping. At this time, data and pilot can be mapped in the form of beamforming beamforming; multiple cooperative nodes can also be grouped, and different cooperative node groups are respectively according to different cell-specific antennas. The port characteristics of the port are used for pilot mapping and data mapping, that is, multiple cooperative nodes are mapped corresponding to one cell-specific antenna port; that is, a cell-specific antenna port may correspond to one cooperative node, or may correspond to multiple Collaboration nodes. The pilot mapping and data mapping by which the cooperative node performs the pilot port may be dynamically specified by the network side, or may be specified according to a fixed rule or a prescribed rule, such as grouping by the parity of the node ID.

可选的，各协作节点分别按照所述目标 UE所在服务节点的 user-specific 天线端口的端口特性进行导频映射和数据映射具体可以是指： Optionally, performing pilot mapping and data mapping according to the port characteristics of the user-specific antenna port of the serving node where the target UE is located may be:

当目标 UE所在的服务节点仅仅存在一个 user-specific的天线端口时，所有的协作节点可以都按照该 user-specific 天线端口的端口特性进行导频映射和数据映射； When there is only one user-specific antenna port in the serving node where the target UE is located, all the cooperative nodes may perform pilot mapping and data mapping according to the port characteristics of the user-specific antenna port;

为了充分发挥不同的天线模式，***也可以设置多个 user-specific的天线端口，当目标 UE所在的服务节点存在多个 user-specific的天线端口时，多个协作节点可以分别按照不同 user-specific 的天线端口的端口特性进行导频映射和数据映射，协作节点也可以分组，不同协作节点分组分别按照不同 user-specific的天线端口的端口特性进行导频映射和数据映射；协作节点按照哪个天线端口进行导频映射和数据映射可以是动态指定，也可以按照固定规则或约定的规则映射。例如，当 user-specific的天线端口数目为 2时，可以但不限于将节点 ID为奇数的协作节点和节点 ID为偶数的协作节点分别按照不同端口的端口特性进行导频映射和数据映射 (如奇数协作节点映射到端口 1，偶数节点映射到端口 2, 从而降低节点间的信令开销）。 In order to fully utilize different antenna modes, the system may also set multiple user-specific antenna ports. When there are multiple user-specific antenna ports in the service node where the target UE is located, multiple cooperative nodes may be respectively according to different user-specific The port characteristics of the antenna port are used for pilot mapping and data mapping, and the cooperative nodes may also be grouped. Different cooperative node groups perform pilot mapping and data mapping according to port characteristics of different user-specific antenna ports respectively; which antenna port the cooperative node according to The pilot mapping and data mapping may be dynamically specified, or may be mapped according to a fixed rule or an agreed rule. For example, when the number of user-specific antenna ports is 2, it may be, but is not limited to, a cooperative node with an odd node ID and a cooperative node with an even node ID, respectively, performing pilot mapping and data mapping according to port characteristics of different ports (eg, The odd cooperative nodes are mapped to port 1, and the even nodes are mapped to port 2, thereby reducing signaling overhead between nodes).

可选的，不同 user-specific的天线端口或不同 cell-specific的天线端口分别传输经过多天线处理的信号的各路信号。 Optionally, different user-specific antenna ports or different cell-specific antenna ports respectively transmit signals of signals processed by multiple antennas.

可选的，可以釆用的多天线处理方式包括空频处理，空时处理，空时频处理， SU-MIMO (单用户多输入多输出）处理， MU-MIMO (多用户多输入多输出）处理，预编码 precoding, beamforming, Alamouti处理，但不限于上述方式。 Optional, multi-antenna processing methods that can be used include space-frequency processing, space-time processing, space-time frequency Processing, SU-MIMO (single-user multiple input multiple output) processing, MU-MIMO (multi-user multiple input multiple output) processing, precoding precoding, beamforming, Alamouti processing, but not limited to the above.

可选的，各协作节点按照本次协作中目标 UE所在服务节点的天线端口特性进行导频映射具体可以是指： Optionally, the pilot mapping performed by each coordinated node according to the antenna port feature of the serving node where the target UE is located in the current cooperation may be:

各协作节点计算目标 UE所在服务节点的天线端口的导频位置（也可以是导频图样）和导频序列； Each coordinated node calculates a pilot position (which may also be a pilot pattern) and a pilot sequence of an antenna port of a serving node where the target UE is located;

各协作节点均根据所计算出的导频位置和导频序列***导频，即在导频位置***导频序列。 Each cooperating node inserts a pilot according to the calculated pilot position and pilot sequence, that is, inserts a pilot sequence at the pilot position.

可选的，各协作节点按照本次协作中目标 UE所在服务节点的天线端口特性进行导频映射具体也可以是指： Optionally, the pilot mapping performed by each coordinated node according to the antenna port feature of the serving node where the target UE is located in the current cooperation may also be:

各协作节点计算目标 UE所在服务节点的天线端口的导频位置（也可以称为导频图样）和导频序列； Each coordinated node calculates a pilot position (also referred to as a pilot pattern) and a pilot sequence of an antenna port of a serving node where the target UE is located;

各协作节点分别对所述导频序列进行线性变换一一如 CDD (循环延迟分集）， PSD (相位旋转分集）等方式的线性变换，也可以是其它类型的线性变换，当然实际应用时也可以使用其它形式的变换；各协作节点进行变换的方式及参数可以相同，也可以不同； Each of the cooperative nodes performs linear transformation on the pilot sequence, such as CDD (Cyclic Delay Diversity), PSD (Phase Rotation Diversity), or other types of linear transformation, and may also be other types of linear transformation. Other forms of transformation are used; the manner and parameters of transformation by each collaboration node may be the same or different;

各协作节点在导频位置***线性变换后的导频序列。 Each cooperating node inserts a linearly transformed pilot sequence at the pilot position.

通过 CDD变换，除了可以获得空口合并增益外，还可以获得一定的频率分集增益。 With the CDD transform, in addition to the air interface combining gain, a certain frequency diversity gain can be obtained.

各个协作节点按照服务节点的对应端口的导频图样***导频序列（或线性变换后的导频序列）的好处在于：（1) UE 可以按照空口合并的方式接收数据。（2) 而且可以避免不同的协作域内，由于使用了相同的导频图样，而对其他协作域产生导频冲突。 (3) 由于不同小区的公共导频和专用导频往往是正交的。相邻小区的公共导频和公共导频之间，专用导频和专用导频也是正交的，可以避免协作场景中，导频之间的相互污染（干扰），因此对于各个协作节点下的不同 UE, 不会影响其在整个带宽内的信道反馈。 The advantages of each cooperative node inserting a pilot sequence (or a linearly transformed pilot sequence) according to the pilot pattern of the corresponding port of the serving node are as follows: (1) The UE can receive data according to the air interface combination. (2) It is also possible to avoid pilot conflicts in other cooperative domains due to the use of the same pilot pattern in different cooperation domains. (3) Since the common pilots and dedicated pilots of different cells are often orthogonal. Between the common pilot and the common pilot of the neighboring cell, the dedicated pilot and the dedicated pilot are also orthogonal, which can avoid mutual pollution (interference) between the pilots in the cooperative scenario, and thus for each coordinated node Different UEs will not affect their channel feedback over the entire bandwidth.

如果对协作节点的导频序列进行了线性变换，例如进行了 CDD, 则各协作节点可以在数据映射时对数据进行同样的 CDD处理，也可以不进行 CDD 处理，当然，进行 PSD或其它线性变换时也是一样；如果没有进行 CDD处理，则网络侧通过控制信令通知目标 UE CDD的量，但不限于这种处理方法。其他处理方法包括在天线端口上进行分集处理 , SU-MIMO处理 , MU-MIMO 处理。 If the pilot sequence of the cooperative node is linearly transformed, for example, CDD is performed, The node may perform the same CDD processing on the data during data mapping, or may not perform CDD processing. Of course, the same is true when performing PSD or other linear transformation; if CDD processing is not performed, the network side notifies the target UE through control signaling. The amount of CDD is, but not limited to, this processing method. Other processing methods include diversity processing on the antenna port, SU-MIMO processing, and MU-MIMO processing.

可选的，由于 CoMP模糊了小区边缘的概念，因此，在 CoMP中，应避免 UE在小区间频繁的来回切换，基于此，可以设定一个大于 1的门限，只有当 UE测量的某个协作小区的功率与服务节点的功率的比值大于或等于门限的情况下，才允许所述目标 UE进行切换，从而避免服务小区的频繁变动。当然，实际应用时也可以用其它门限判断方法，比如通过用功率差值与门限相比来判断是否切换，或是当服务节点的功率与某个协作节点的功率的比值小于或等于设定门限的时候切换等。 Optionally, since CoMP obscures the concept of a cell edge, in CoMP, the UE should avoid frequent back and forth handover between cells. Based on this, a threshold greater than 1 can be set, only when the UE measures a certain collaboration. When the ratio of the power of the cell to the power of the serving node is greater than or equal to the threshold, the target UE is allowed to perform handover, thereby avoiding frequent changes of the serving cell. Of course, other threshold determination methods may be used in practical applications, such as determining whether to switch by comparing the power difference with the threshold, or when the ratio of the power of the serving node to the power of a cooperative node is less than or equal to the set threshold. When switching, etc.

如图 3所示，目标 UE为 UE A的 CoMP中，其服务节点 cell #3 (本文为简化说明，将 ID为 n的小区以 cell #n的形式描述）和协作节点 _cell #0、协作节点 cell #1、协作节点 cell #2共同组成协作域 1 ; 目标 UE为 UE B的 CoMP 中，其服务节点 cell #8和协作节点 cell #4、协作节点 cell #6、协作节点 cell #7 共同组成协作域 2; 在两个协作域中，各协作节点均是按照本协作域中服务节点（即本次 CoMP中目标 UE所在服务节点）的天线端口 5的端口特性进行数据映射和导频映射，以及发送映射后的数据和导频给相应 UE。按照本发明的方法，由于不同的协作域内的导频位置是依据服务节点一致的，而不同的服务节点之间是尽量正交的，因此可以避免导频的干扰问题。 As shown in FIG. 3, the target UE is the CoMP of UE A, and its serving node cell #3 (this is a simplified description, the cell with the ID n is described in the form of cell #n) and the cooperative node _ce ll #0, collaboration. The node cell #1 and the coordinating node cell #2 form a cooperative domain 1 together; the target UE is the CoMP of the UE B, and the serving node cell #8 and the cooperative node cell #4, the cooperative node cell #6, and the cooperative node cell #7 share Composing the cooperation domain 2; in the two cooperation domains, each of the cooperation nodes performs data mapping and pilot mapping according to the port characteristics of the antenna port 5 of the service node in the collaboration domain (that is, the service node where the target UE is located in the current CoMP) And transmitting the mapped data and pilots to the corresponding UE. According to the method of the present invention, since the pilot positions in different cooperation domains are consistent according to the service nodes, and the different service nodes are as orthogonal as possible, the interference problem of the pilots can be avoided.

本文中的节点包括以下任一个或任几个：小区，基站，中继站等。 The nodes herein include any one or more of the following: a cell, a base station, a relay station, and the like.

本文中所说的 "协作节点按照某天线端口特性进行导频映射和数据映射" 也可以描述成 "协作节点映射到某天线端口" 。 In this paper, "the pilot node performs pilot mapping and data mapping according to the characteristics of an antenna port" can also be described as "cooperative node mapping to an antenna port".

下面用本发明的两个应用示例进一步加以说明。 The following is further illustrated by two application examples of the present invention.

如图 4所示，根据协作节点的标识，按照固定的模式映射到天线端口一一即协作节点按照哪个天线端口进行导频映射和数据映射是固定的。在图 4中，以节点 ID为标识，假设端口数为 2, 将小区 ID为奇数的映射到第一端口，小区 ID为偶数的节点映射到第二端口。在图 4中，为了获得更大的增益，两个天线端口上分别传输 Alamouti编码的两路信号。 As shown in FIG. 4, according to the identifier of the cooperative node, mapping to the antenna port according to a fixed pattern, that is, which antenna port the pilot node performs pilot mapping and data mapping is fixed. In Figure 4, The node ID is used as the identifier, and the number of ports is 2, the cell ID is oddly mapped to the first port, and the node with the cell ID is evenly mapped to the second port. In Fig. 4, in order to obtain a larger gain, two Alamouti-encoded signals are transmitted on the two antenna ports, respectively.

根据上述的发明，下面给出应用示例一，其流程如图 5所示，结合当前 LTE中已经定义的天线端口来进行说明。 According to the above invention, the application example 1 is given below, and the flow thereof is as shown in FIG. 5, which is described in conjunction with the antenna port already defined in the current LTE.

应用示例一的步骤： Steps for applying example one:

在当前的 LTE中，定义了 user-specific的单天线端口 5。一种方法是协作节点按照服务节点的天线端口 5进行映射。 LTE中的所谓的天线端口 5的特性是：天线端口 5为 user-specific的，仅仅存在于用户使用的资源块内；天线端口 5对应一根或多根物理天线，多根物理天线通过波束成型权值影射到天线端口 5。 In current LTE, a user-specific single antenna port 5 is defined. One method is that the cooperative node maps according to the antenna port 5 of the serving node. The characteristics of the so-called antenna port 5 in LTE are: antenna port 5 is user-specific and exists only in the resource block used by the user; antenna port 5 corresponds to one or more physical antennas, and multiple physical antennas are beamformed. The weight is mapped to antenna port 5.

第一步、网络侧根据测量信息，同时结合邻近节点的资源分配及其负载情况选择协作的节点。测量信息可以是 UE测量并上报的各节点到 UE的信号衰落信息或功率信息，也可以是网络侧根据上行信号测量的 UE位置信息；但不限于上述两种信息。 In the first step, the network side selects the cooperative node according to the measurement information and the resource allocation of the neighboring node and its load. The measurement information may be signal fading information or power information of each node measured by the UE and reported by the UE, or may be UE location information measured by the network side according to the uplink signal; but is not limited to the above two types of information.

优选的原则是选择资源有空闲且负载较轻的节点。当邻近节点的负载较大，或者没有空闲资源参与服务节点的协作时，服务节点可以在选择协作节点时，可以考虑不选择该节点参与协作。 The preferred principle is to select a node that has resources that are idle and lightly loaded. When the load of the neighboring node is large, or there is no idle resource participating in the cooperation of the service node, the service node may consider not to select the node to participate in the cooperation when selecting the cooperative node.

第二步、网络侧通知协作节点，本次协作中目标 UE所在的服务节点的小区标识，协作节点按照所述目标 UE所在的服务节点的天线端口 5进行导频映射。 In the second step, the network side notifies the coordinating node, the cell identifier of the serving node where the target UE is located in the cooperation, and the coordinating node performs pilot mapping according to the antenna port 5 of the serving node where the target UE is located.

在 LTE中，天线端口 5为 user-specific的，只在使用该端口的资源上存在 user-specifc的导频信号。协作节点根据服务节点的标识，即可计算服务节点天线端口 5中 user-specific的导频位置和导频序列。 In LTE, antenna port 5 is user-specific, and only the pilot signal of user-specifc exists on the resource using the port. The cooperating node can calculate the user-specific pilot position and pilot sequence in the service node antenna port 5 according to the identity of the serving node.

第三步、协作节点根据计算得到的 user-specific 的导频位置和导频序列 ***导频。 In the third step, the cooperative node inserts the pilot according to the calculated user-specific pilot position and pilot sequence.

如图 6所示：为了简单，这里 4叚设天线端口 5没有扩展的情况，图 6中假设小区 Cell #1为本次协作过程中， UE所在的服务小区，小区 Cell #2 为参与协作的协作小区，则此时小区 Cell#2的 user-specific天线端口的导频图样按照小区 Cell#l中 user-specific天线端口的导频图样***导频序列。 As shown in FIG. 6 , for the sake of simplicity, the antenna port 5 is not extended. In FIG. 6 , the cell Cell #1 is assumed to be the serving cell in which the UE is located, and the cell Cell #2 is the reference. In cooperation with the coordinated cell, the pilot pattern of the user-specific antenna port of the cell Cell#2 is inserted into the pilot sequence according to the pilot pattern of the user-specific antenna port in the cell Cell#1.

为了进一步获得分集的增益，协作节点可以将服务节点对应的导频序列进行线性处理后，再***导频的位置。例如：设服务节点在分配的资源内对应的导频序列为 = …… ) , 在不同的协作节点***时，对其进行 In order to further obtain the gain of the diversity, the cooperative node may linearly process the pilot sequence corresponding to the serving node, and then insert the position of the pilot. For example: Let the service node correspond to the pilot sequence in the allocated resource = ......), when different cooperative nodes are inserted,

PSD的线性变换其中/？为线性相位序列。并将变换后的序列*** 到对应的导频位置。也可以进行其它形式的线性变换。 Linear transformation of PSD where /? Is a linear phase sequence. The transformed sequence is inserted into the corresponding pilot position. Other forms of linear transformation can also be performed.

第四步、对数据按照与导频序列同样的模式进行处理后，映射到相应的子载波上进行发射。例如导频按照 PSD的方式进行了线性变换。则协作节点对数据进行相同的处理后，进行数据映射。 In the fourth step, the data is processed in the same mode as the pilot sequence, and then mapped to the corresponding subcarrier for transmission. For example, the pilot is linearly transformed in the manner of PSD. Then, the collaboration node performs the same processing on the data and performs data mapping.

在第三步，第四步中，都是釆用 PSD的方式进行线性变换，另外一种讨论较为广泛一种线性变换的是利用 CDD 的方法，具体是，首先按照服务节点的导频图样和将导频序列***，同时将数据映射到子载波的对应位置。之后进行 IFFT (快速逆傅里叶变换）后，进行循环延迟处理，然后加入循环前缀。这里举出了两个线性变换的方法，但不限于上述方法。 In the third step and the fourth step, all of them are linearly transformed by means of PSD. Another type of discussion is more extensive. A linear transformation is a method using CDD. Specifically, first, according to the pilot pattern of the service node and The pilot sequence is inserted while mapping the data to the corresponding location of the subcarriers. After the IFFT (Fast Inverse Fourier Transform), the loop delay processing is performed, and then the loop prefix is added. Here are two methods of linear transformation, but are not limited to the above methods.

第五步、将映射后的信息（包括映射后的数据及导频）进行发送。不同协作节点的发射信号在空口合并后，接收机进行接收检测。 In the fifth step, the mapped information (including the mapped data and the pilot) is sent. After the transmitted signals of different cooperative nodes are combined in the air interface, the receiver performs reception detection.

应用示例二：与应用实例一的差别在于，在协作节点获得服务节点的 ID后，计算服务小区的 cell-specific 天线端口对应的导频图样和对应端口的导频序列；进一步地，根据计算出的所映射到的 cell-specific天线端口对应的导频图样，作为协作节点在协作资源内的 user-specific 天线端口的导频图样***计算得到的该天线端口对应的导频序列。如图 7所示： Cell #2才艮据 Cell #1的小区 ID, 可以获得 Cell #1对应的 cell-specific天线端口的导频图样和该资源对应的导频序列。同时才艮据网络规划， 4叚设协作小区 Cell #2将映射到 Cell #1的天线端口 1 , 则 Cell # 2根据 Cell #1 在该资源内的 cell-specific天线端口 1的导频序列，作为 Cell #2 在该资源内的 user-specific序列， ***到 cell #1 端口 1 对应的导频位置上。 Application example 2: The difference from the application example 1 is that after the cooperation node obtains the ID of the serving node, the pilot pattern corresponding to the cell-specific antenna port of the serving cell and the pilot sequence of the corresponding port are calculated; further, according to the calculation The pilot pattern corresponding to the mapped cell-specific antenna port is inserted into the calculated pilot sequence corresponding to the antenna port as a pilot pattern of the user-specific antenna port of the cooperative node in the cooperative resource. As shown in FIG. 7 , Cell #2 can obtain the pilot pattern of the cell-specific antenna port corresponding to Cell #1 and the pilot sequence corresponding to the resource according to the cell ID of Cell #1. At the same time, according to the network plan, 4, the coordinated cell Cell #2 will be mapped to the antenna port 1 of the Cell #1, and then the Cell # 2 will be based on the pilot sequence of the cell-specific antenna port 1 of the Cell #1 in the resource. As a user-specific sequence within Cell #2, inserted into cell #1 port 1 Corresponding pilot position.

应用示例三： Application example three:

为了获得更大的增益， ***可以设置多个 user-specific的端口，当存在多个 user-specific的端口时，可以按照固定的模式映射到服务节点的不同端口。假设 user-specific的端口数为 2 , 分别为第一端口和第二端口。 In order to obtain greater gain, the system can set multiple user-specific ports. When there are multiple user-specific ports, it can be mapped to different ports of the service node in a fixed mode. Assume that the number of user-specific ports is 2, which are the first port and the second port, respectively.

根据协作节点的标识，按照固定的模式映射到天线端口。在图 4中，以节点 ID为标识，将节点分为两类，两类节点；小区 ID为奇数的映射到第一端口，小区 ID为偶数的节点映射到第二端口。在图 4中，为了获得更大的增益，两个端口上分别传输 Alamouti编码的两路信号，在图 4中，服务节点 cell#0 与协作节点 cell #l、协作节点 cell#2协作，服务节点 cell #0 与协作节点 cell #2 均发送 [^Sl'^_s;] , 协作节点 cell#l发送 [^S2'^s:]。 Map to the antenna port in a fixed pattern based on the identity of the cooperating node. In FIG. 4, the node ID is used to identify the node into two types, two types of nodes; the cell ID is oddly mapped to the first port, and the node with the even cell ID is mapped to the second port. In FIG. 4, in order to obtain a larger gain, two signals of Alamouti encoding are respectively transmitted on the two ports. In FIG. 4, the serving node cell #0 cooperates with the cooperative node cell #1 and the cooperative node cell #2, and services node cell # 0 and the cell # 2 are cooperative node transmits ^[Sl ^'_s;], cooperating nodes transmit cell # l ^[S2' ^s:].

当然，本发明还可有其他多种实施例，在不背离本发明精神及其实质的但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。 It is a matter of course that the invention may be embodied in various other forms and modifications without departing from the spirit and scope of the invention.

工业实用性 Industrial applicability

本发明的技术方案可以使 UE通过简单的空口合并即可获得性能增益。而且通过根据服务小区的天线端口进行导频和数据的映射，可以避免导频冲突问题，同时避免了 UE的计算复杂度过高的问题。各个协作节点内的普通 UE可以在全带宽内进行信道估计和信道测量。 The technical solution of the present invention can enable the UE to obtain performance gain through simple air interface combining. Moreover, by performing pilot and data mapping according to the antenna port of the serving cell, the pilot conflict problem can be avoided, and the problem of excessive computational complexity of the UE is avoided. A normal UE within each coordinated node can perform channel estimation and channel measurement within the full bandwidth.

Claims

权利要求书 Claim

1、一种多点协作传输方法，包括： 1. A multipoint coordinated transmission method, comprising:

2、如权利要求 1所述的多点协作传输方法，其特征在于，各协作节点分别按照所述目标终端所在服务节点的天线端口特性进行导频映射和数据映射是指： 2. The multipoint coordinated transmission method according to claim 1, wherein each of the cooperative nodes performs pilot mapping and data mapping according to antenna port characteristics of the serving node where the target terminal is located, respectively:

3、如权利要求 2所述的多点协作传输方法，其特征在于，各协作节点分别按照所述目标终端所在服务节点的小区特定的天线端口的端口特性进行导频映射和数据映射具体是指： The multi-point cooperative transmission method according to claim 2, wherein each of the cooperative nodes performs pilot mapping and data mapping according to the port characteristics of the cell-specific antenna port of the serving node where the target terminal is located, respectively. :

4、如权利要求 2所述的多点协作传输方法，其特征在于： 4. The multipoint coordinated transmission method according to claim 2, wherein:

当目标终端所在的服务节点存在多个小区特定的天线端口，并且多个协作节点分别按照不同小区特定的天线端口的端口特性进行导频映射和数据映射时，将数据和导频以波束赋形的形式进行发送。 When the serving node where the target terminal is located has multiple cell-specific antenna ports, and the plurality of cooperative nodes respectively perform pilot mapping and data mapping according to port characteristics of different cell-specific antenna ports, the data and the pilot are beam-shaped. The form is sent.

5、如权利要求 2所述的多点协作传输方法，其特征在于，各协作节点分别按照所述目标终端所在服务节点的用户特定的天线端口的端口特性进行导频映射和数据映射具体是指： 5. The multipoint coordinated transmission method according to claim 2, wherein each of the cooperative nodes is divided into The pilot mapping and data mapping according to the port characteristics of the user-specific antenna port of the serving node where the target terminal is located specifically refers to:

6、如权利要求 1到 5中任一项所述的多点协作传输方法，其特征在于，各协作节点按照目标终端所在服务节点中所述的天线端口特性进行导频映射具体是指： The multipoint coordinated transmission method according to any one of claims 1 to 5, wherein each of the cooperative nodes performs pilot mapping according to the antenna port characteristic in the serving node where the target terminal is located, which specifically refers to:

7、如权利要求 6所述的多点协作传输方法，其特征在于： 7. The multipoint coordinated transmission method according to claim 6, wherein:

线性变换方式为循环延迟分集，或相位旋转分集。 The linear transformation method is cyclic delay diversity, or phase rotation diversity.

8、如权利要求 7所述的多点协作传输方法，其特征在于： 8. The multipoint coordinated transmission method according to claim 7, wherein:

各协作节点在数据映射时对数据进行与导频同样的线性变换。 Each cooperative node performs the same linear transformation on the data as the pilot at the time of data mapping.

9、如权利要求 1到 5中任一项所述的多点协作传输方法，其特征在于，还包括： The multipoint coordinated transmission method according to any one of claims 1 to 5, further comprising:

设定一个大于 1的门限，仅当一协作节点的功率与服务节点的功率的比值大于或等于该门限时，允许目标终端进行服务小区的切换。 A threshold greater than one is set, and the target terminal is allowed to perform handover of the serving cell only when the ratio of the power of a cooperative node to the power of the serving node is greater than or equal to the threshold.

10、一种多点协作传输***，包括：一个或多个协作节点及服务节点；所述协作节点用于按照本次协作中目标终端所在服务节点的天线端口特性进行导频映射和数据映射，以及在本协作节点向目标终端发送映射后的信息。 A multi-point coordinated transmission system, comprising: one or more cooperative nodes and a service node; the cooperative node is configured to perform pilot mapping and data mapping according to antenna port characteristics of a service node where the target terminal is located in the collaboration, And sending the mapped letter to the target terminal at the collaboration node Interest.

11、如权利要求 10所述的多点协作传输***，其特征在于，所述各协作节点按照目标终端所在服务节点的天线端口特性进行导频映射和数据映射是才 B： The multipoint coordinated transmission system according to claim 10, wherein each of the cooperative nodes performs pilot mapping and data mapping according to an antenna port characteristic of a serving node where the target terminal is located:

12、如权利要求 11所述的多点协作传输***，其特征在于，所述各协作节点分别按照目标终端所在服务节点的小区特定的天线端口的端口特性进行导频映射和数据映射具体是指： The multipoint coordinated transmission system according to claim 11, wherein the cooperative nodes respectively perform pilot mapping and data mapping according to port characteristics of a cell-specific antenna port of a serving node where the target terminal is located, specifically :

13、如权利要求 11所述的多点协作传输***，其特征在于，所述各协作节点分别按照目标终端所在服务节点的用户特定的天线端口的端口特性进行导频映射和数据映射具体是指： The multipoint coordinated transmission system according to claim 11, wherein each of the cooperative nodes performs pilot mapping and data mapping according to port characteristics of a user-specific antenna port of the serving node where the target terminal is located, specifically :

14、如权利要求 10到 13中任一项所述的多点协作传输***，其特征在于，各协作节点按照目标终端所在服务节点中所述的天线端口特性进行导频映射具体是指： The multipoint coordinated transmission system according to any one of claims 10 to 13, characterized in that The pilot mapping performed by each coordinated node according to the characteristics of the antenna port described in the serving node where the target terminal is located specifically refers to:

各协作节点计算所映射到的天线端口的导频位置和导频序列 , 以及对所述导频序列进行线性变换，并在导频位置***线性变换后的导频序列。 Each cooperating node calculates a pilot position and a pilot sequence of the mapped antenna port, and linearly transforms the pilot sequence, and inserts a linearly transformed pilot sequence at the pilot position.