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    • 2. 发明申请
    • METHOD OF DETERMINING A CHANNEL STATE IN COORDINATED MULTIPOINT TRANSMISSION
    • 确定协调多点传输中的通道状态的方法
    • WO2012110863A1
    • 2012-08-23
    • PCT/IB2012/000159
    • 2012-01-05
    • ALCATEL LUCENTZHANG, XiaoboSUN, Huan
    • ZHANG, XiaoboSUN, Huan
    • H04B7/06
    • H04B7/024H04B7/0626
    • In order to reduce the feedback overhead of channel state information in Coordinated Multipoint (CoMP) transmission, the present invention provides a method of determining a channel state in the CoMP transmission, wherein the serving base station receives first channel state information with the serving base station and second channel state information with each of coordinated base stations, fed back by a user equipment; informing each coordinated base stations of the corresponding second channel state information; precoding a first reference signal according to the first channel state information, and sending the precoded first reference signal to the user equipment on the communication resource commonly used with the coordinated base station, wherein the first reference signal is superimposed with precoded second reference signals respectively sent by each of coordinated base stations; receiving third channel state information fed back by the user equipment according to the superimposed reference signal, and determining a channel state of the coordinated multipoint transmission corresponding to the user equipment, according to the first, second and third channel state information.
    • 为了减少协调多点(CoMP)传输中的信道状态信息的反馈开销,本发明提供一种确定CoMP传输中的信道状态的方法,其中服务基站与服务基站接收第一信道状态信息 和每个协调基站的第二信道状态信息,由用户设备反馈; 通知每个协调基站对应的第二信道状态信息; 根据第一信道状态信息对第一参考信号进行预编码,以及将预编码的第一参考信号发送到与协调基站共同使用的通信资源上的用户设备,其中第一参考信号与分别发送的预编码的第二参考信号叠加 由各协调基站组成; 接收根据叠加参考信号由用户设备反馈的第三信道状态信息,根据第一,第二和第三信道状态信息确定与用户设备相对应的协调多点传输的信道状态。
    • 5. 发明申请
    • METHOD OF AND APPARATUS FOR PRE-CODED PHYSICAL DOWNLINK CONTROL CHANNEL REFERENCE SIGNAL AND BLIND DECODING
    • 预编码物理下行链路控制信道参考信号和盲解码的方法和装置
    • WO2013017946A2
    • 2013-02-07
    • PCT/IB2012/001661
    • 2012-07-23
    • ALCATEL LUCENTZHANG, XiaoboCHEN, Fang-Chen
    • ZHANG, XiaoboCHEN, Fang-Chen
    • H04W72/042H04L1/0038H04L1/0046H04L5/0007H04L5/0053
    • The invention proposes a method of and apparatus for a pre-coded physical downlink control channel reference signal and blind decoding, in a design of the reference signal, the demodulation reference signal is used for demodulating physical downlink control channel signaling, wherein, the physical downlink control channel signaling is embedded in. a physical downlink shared channel, an the demodulation reference signal is included in a control channel element, in a method tor a user equipment to perform blind decoding, the user equipment obtains blind decoding indication information.from a base station, the blind decoding indication information including an indication of a search space in which the user equipment performs the blind decoding, wherein the search space includes a control channel element of a traditional physical downlink, control channel and further includes a control channel element of a pre-coded physical downlink control channel; and performs blind decoding for the number of searches indicated by the blind decoding indication information in the search space indicated by the blind decoding indication information, according to the blind decoding indication information.
    • 本发明提出了一种预编码物理下行链路控制信道参考信号和盲解码的方法和装置,在参考信号的设计中,解调参考信号用于解调物理下行链路控制信道信令,其中,物理下行链路 控制信道信令嵌入在物理下行链路共享信道中,解调参考信号被包括在控制信道单元中,在用户设备的方法中进行盲解码,用户设备从基站获取盲解码指示信息 所述盲解码指示信息包括用户设备执行所述盲解码的搜索空间的指示,其中所述搜索空间包括传统物理下行链路的控制信道要素,控制信道,并且还包括: 预编码物理下行链路控制信道; 并且根据盲解码指示信息对由盲解码指示信息指示的搜索空间中的盲解码指示信息指示的搜索次数执行盲解码。
    • 6. 发明申请
    • METHOD, APPARATUS, BASE STATION AND USER EQUIPMENT FOR REDUCING INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM
    • 用于减少无线通信系统中干扰的方法,装置,基站和用户设备
    • WO2012131498A2
    • 2012-10-04
    • PCT/IB2012/000878
    • 2012-03-28
    • ALCATEL LUCENTZHANG, Xiaobo
    • ZHANG, Xiaobo
    • H04W28/16
    • H04L5/0032H04L5/0044H04L5/0073H04L5/0087H04L5/1469H04W72/1226H04W72/1278
    • A method and apparatus, a base station and user equipment for reducing interference in a wireless communication system are provide in the present invention. The wireless communication system comprises a first cell and a second cell, wherein uplink/downlink sub-frame configuration of the first cell and the second cell is asymmetry and may result in implementing a first type of sub-frame at the first cell while implementing a second type of sub-frame different from the first type of sub-frame at the second cell, thereby producing inter-cell interference. The method comprises: mapping a resource grid of at least one of the type of sub-frame and the second type of sub-frame to reserve at least one of a resource element in the first type of sub-frame and corresponding to a resource element in the second type of sub-frame and mapped for at least one of a reference signal and a common control channel, and a resource element in the second type of sub-frame and corresponding to a resource element in the first type of sub-frame and mapped for at least one of a reference signal and a common control channel, for not transmitting information; and transmitting a mapping result of the mapping step.
    • 本发明提供了用于减少无线通信系统中的干扰的方法和设备,基站和用户设备。 该无线通信系统包括第一小区和第二小区,其中第一小区和第二小区的上行链路/下行链路子帧配置是不对称的,并且可以导致在第一小区处实现第一类型的子帧, 第二类型的子帧在第二单元处与第一类型的子帧不同,从而产生小区间干扰。 所述方法包括:映射所述子帧类型和所述第二类型子帧中的至少一个的资源网格,以保留所述第一类型子帧中的资源元素中的至少一个资源元素,所述资源元素对应于资源元素 在第二类型的子帧中并且被映射用于参考信号和公共控制信道中的至少一个以及第二类型的子帧中的资源元素并且与第一类型的子帧中的资源元素相对应 并被映射用于参考信号和公共控制信道中的至少一个,用于不传送信息; 并发送映射步骤的映射结果。
    • 9. 发明申请
    • METHODS OF TRANSMITTING COORDINATE MULTIPLE POINT DATA BASED ON ORTHOGONAL COVERING CODES
    • 基于正交覆盖码发送协调多点数据的方法
    • WO2012093334A1
    • 2012-07-12
    • PCT/IB2012/000063
    • 2012-01-03
    • ALCATEL LUCENTZHANG, XiaoboZHAO, Yan
    • ZHANG, XiaoboZHAO, Yan
    • H04W16/10
    • H04B7/024H04B7/0691H04J11/0053
    • The present invention relates to methods of transmitting coordinate multiple point data based on orthogonal covering codes. In an embodiment of the present invention, there is provided a method of transmitting downlink data in a base station of a multiple input multiple output system. The method includes: A. determining a plurality of antenna groups from antennas of a plurality of coordinate multiple point cells; B. modulating inter-cell coordinate multiple point downlink data symbols for each antenna groups using different orthogonal covering codes. The orthogonal covering codes have a length not greater than twice the number of the antenna groups. With the methods of the present invention, a base station and a user equipment can distinguish signals from different coordinate multiple point cells, different antenna groups, or different coordinate multiple point clusters, reducing interference between signals from the different coordinate multiple point cells, the different antenna groups, or the different coordinate multiple point clusters.
    • 本发明涉及基于正交覆盖码发送坐标多点数据的方法。 在本发明的实施例中,提供了一种在多输入多输出系统的基站中发送下行链路数据的方法。 该方法包括:A.从多个坐标多点单元的天线确定多个天线组; B.使用不同的正交覆盖码来调制每个天线组的小区间坐标多点下行链路数据符号。 正交覆盖码的长度不得大于天线组数量的两倍。 利用本发明的方法,基站和用户设备可以区分来自不同坐标多点单元,不同天线组或不同坐标多点群的信号,减少来自不同坐标多点单元的信号之间的干扰,不同的坐标多点单元 天线组或不同的坐标多点集群。