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WO2012167692A1 - 小区间干扰抑制的下行业务传输方法及装置 - Google Patents

小区间干扰抑制的下行业务传输方法及装置 Download PDF

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Publication number
WO2012167692A1
WO2012167692A1 PCT/CN2012/075889 CN2012075889W WO2012167692A1 WO 2012167692 A1 WO2012167692 A1 WO 2012167692A1 CN 2012075889 W CN2012075889 W CN 2012075889W WO 2012167692 A1 WO2012167692 A1 WO 2012167692A1
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WIPO (PCT)
Prior art keywords
cell
user equipment
coordinated
service data
specific pilot
Prior art date
Application number
PCT/CN2012/075889
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English (en)
French (fr)
Inventor
刘文豪
Original Assignee
中兴通讯股份有限公司
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Publication of WO2012167692A1 publication Critical patent/WO2012167692A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0073—Allocation arrangements that take into account other cell interferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment

Definitions

  • the present invention relates to the field of service data transmission technology for coordinated multi-point transmission in a multi-antenna communication system, and particularly relates to a downlink service transmission method and apparatus for inter-cell interference suppression. Background technique
  • CoMP Coordinate Multi-Point
  • UE user terminals
  • the CoMP defined by the 3rd Generation Partnership Project (3GPP) includes two scenarios, one is Coordinated Scheduling and Coordinating Beamforming (CS/CB), that is, through interactive scheduling between adjacent nodes. Information, to achieve interference between the transmission signals of each node is coordinated; the other is multi-point joint processing, that is, multiple cooperative nodes are jointly shared by data and channel state information (CSI: channel state information), scheduling information, etc. Provide services to target users.
  • Cooperative multipoint transmission of joint beamforming belongs to the first CoMP scenario.
  • each cell that is, the node, can implement a physical downlink shared channel (PDSCH: Physical Downlink Shared) by using a precoding method. Channel) mutual avoidance.
  • PDSCH Physical Downlink Shared
  • Channel Physical Downlink Shared
  • LTE Long Term Evolution
  • LTE R10 version of the Long Term Evolution
  • CRS Cell
  • Specific Reference Signal which may also be referred to as a cell-specific reference signal, and the CRS existing in the downlink subframe of each cell will be able to receive the cell.
  • the neighboring cells of the signal that is, the physical downlink shared channel of the coordinated cell, generate strong interference, thereby affecting the quality of the downlink service data received by the UE in the neighboring cell using the PDSCH.
  • a schematic diagram of signal interference between a cell and a neighboring cell can be as shown in FIG. 1, wherein the user equipment of the cell located in the middle
  • UE is capable of receiving signal interference from neighboring cells indicated by dashed lines.
  • the CRSs of the three cells occupy the OFDM orthogonal frequency division multiplexing technology in the frequency domain.
  • resource elements RE: Resource Element
  • RB Resource Block
  • the technical problem to be solved by the present invention is to provide a downlink traffic transmission method and apparatus for inter-cell interference suppression, thereby eliminating neighboring cells in the downlink service data, i.e., cell-specific pilots of the coordinated cell.
  • the present invention provides the following solutions:
  • the embodiment of the present invention provides a downlink service transmission method for inter-cell interference suppression, which includes: a user equipment receiving service data, where the service data includes a cell-specific pilot that is sent by a coordinated cell through a preset antenna port;
  • the user equipment is configured according to channel state information between the coordinated cell and the user equipment, and small A zone-specific pilot sequence that eliminates the cell-specific pilots included in the traffic data.
  • the coordinated cell presets that the antenna port of the cell-specific pilot is one, or two.
  • the method before receiving the service data, the method further includes:
  • the user equipment receives an identifier of the coordinated cell sent by a serving cell base station.
  • the process of acquiring channel state information between the coordinated cell and the user equipment is:
  • the acquiring process of the cell-specific pilot sequence is: calculating, according to the identifier of the coordinated cell, a cell-specific pilot offset of the coordinated cell; Transmitting, determining, in the service data, a corresponding subframe in which the service data interfered by the cell-specific pilot of the coordinated cell is located;
  • the user equipment according to the channel state information and the cell-specific pilot sequence between the coordinated cell and the user equipment, canceling the cell-specific pilot included in the service data, including:
  • the ⁇ is the service data received by the user equipment; the Hu is channel state information between the user equipment and the serving cell; and the precoding matrix is used by the serving cell for the user equipment.
  • the Si is the original service data sent by the serving cell to the user equipment; the Hpi is the i-th coordinated cell with cell-specific pilot interference and the use Channel state information between the user equipments; the Pi is a cell-specific pilot sequence of the i-th coordinated cell with cell-specific pilot interference.
  • the user equipment cancels the cell-specific pilot included in the service data according to channel state information and a cell-specific pilot sequence between the coordinated cell and the user equipment:
  • the Y is the service data received by the user equipment; the Hu is channel state information between the user equipment and the serving cell; and the precoding matrix is used by the serving cell for the user equipment.
  • the Si is the original service data sent by the serving cell to the user equipment; the HH is the channel state information between the coordinated cell and the user equipment of the i-th physical downlink shared channel interference; Wi is the ith a precoding matrix used by the coordinated cell with physical downlink shared channel interference; & is the service data transmitted by the physical downlink shared channel of the i-th cooperative cell having physical downlink shared channel interference; the Hpi is the ith existing cell specific Channel state information between the coordinated cell of the pilot interference and the user equipment; the Pi is a cell-specific pilot sequence of the i-th coordinated cell of the cell-specific pilot interference.
  • the embodiment of the invention further provides a downlink service transmission device for inter-cell interference suppression, which includes:
  • a receiving module configured to receive, by the user equipment, service data, where the service data includes a cell-specific pilot that is sent by the cooperation cell through a preset antenna port;
  • a cancellation module configured to cancel, by the user equipment, the cell specific pilot included in the service data according to channel state information between the coordinated cell and the user equipment and a cell-specific pilot sequence.
  • the receiving module is further configured to: receive, by the user equipment, an identifier of the coordinated cell sent by a serving cell base station.
  • the eliminating module includes:
  • a first calculating unit configured to calculate, according to the identifier of the coordinated cell, a pilot sequence used to estimate channel state information between the cooperation cell and the user equipment;
  • a measuring unit configured to measure channel state information between the coordinated cell and the user equipment according to the pilot sequence.
  • the eliminating module includes:
  • a second calculating unit configured to calculate, according to the identifier of the coordinated cell, a cell-specific pilot offset of the coordinated cell
  • a first determining unit configured to determine, according to the cell-specific pilot offset, a corresponding subframe in which the service data of the cell-specific pilot interference of the coordinated cell is located in the service data; And determining, according to the local sequence of the corresponding subframe, the cell-specific pilot sequence.
  • the elimination module is configured to calculate according to: And eliminating a cell-specific pilot of the coordinated cell in the service data;
  • the Y is the service data received by the user equipment; the Hu is channel state information between the user equipment and the serving cell; and the precoding matrix is used by the serving cell for the user equipment.
  • the Si is the original service data sent by the serving cell to the user equipment; the Hpi is channel state information between the i-th cooperative cell with cell-specific pilot interference and the user equipment; a cell-specific pilot sequence of the i-th coordinated cell in the cell-specific pilot interference; the channel state information between the coordinated cell and the user equipment of the i-th physical downlink shared channel interference; Wi is the i-th existence
  • the precoding matrix used by the coordinated cell of the physical downlink shared channel interference; the Si is the service data transmitted by the physical downlink shared channel of the i th cooperative cell that has the physical downlink shared channel interference.
  • the downlink service transmission for inter-cell interference suppression is The method and the device receive the service data by using a user equipment in the serving cell, where the service data includes a cell-specific pilot that is transmitted by the interfering cell adjacent to the serving cell, that is, the interfering cell, by using the preset cell-specific pilot antenna port. And eliminating, by the user equipment, the cell-specific pilot included in the service data according to channel state information and a cell-specific pilot sequence between the coordinated cell and the user equipment, so as to ensure that the user receives The quality of business data.
  • FIG. 1 is a schematic diagram 1 of signal interference between cells in the prior art
  • FIG. 2 is a schematic diagram 2 of signal interference between cells in the prior art
  • FIG. 3 is a schematic flowchart of a downlink service transmission method for inter-cell interference suppression according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of an application scenario of a downlink service transmission method for inter-cell interference suppression according to an embodiment of the present disclosure
  • FIG. 5 is a schematic structural diagram of a downlink service transmission apparatus for inter-cell interference suppression according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a cancellation module in a downlink service transmission apparatus for inter-cell interference suppression according to an embodiment of the present invention.
  • the embodiment of the present invention provides a downlink service transmission method for inter-cell interference suppression. As shown in FIG. 3, the method may specifically include the following steps:
  • Step 31 The user equipment receives service data, where the service data includes a cell-specific pilot that is sent by the coordinated cell through a preset antenna port.
  • Step 32 The user equipment cancels the cell specific pilot included in the service data according to channel state information between the coordinated cell and the user equipment and a cell-specific pilot sequence.
  • the implementation of the foregoing method provided by the embodiment of the present invention can eliminate the CRS of the coordinated cell existing in the service data, thereby ensuring the quality of the service data received by the user equipment.
  • the foregoing method provided by the embodiment of the present invention is specifically applicable to a coordinated multipoint transmission system including a serving cell and at least one coordinated cell, and the serving cell includes at least one user equipment, where the coordinated cell is the service. Interfering cells adjacent to the cell.
  • the system is applied to the nodes in the high-level LTE scenario, that is, the cell must deliver the CRS in the normal downlink subframe, so that the UE that is applied to the LTE R8 version can communicate normally.
  • the UE applied to the LTE R8 version needs to be demodulated by the CRS.
  • the number of pilots of the CRS should be minimized, because the demodulated data of the UE applied to the LTE R10 version is estimated by the DeModulation Reference Signal (DMRS).
  • DMRS DeModulation Reference Signal
  • the CRS and the physical downlink shared channel (PDSCH) of the neighboring cell interfere with each other, the channel state information (CSI) of the channel estimated by the CRS is also affected by the interference, and therefore, the cooperation involved in the embodiment of the present invention
  • the CRS can be sent only on one or two preset antenna ports.
  • the coordinated cell preferably presets two antenna ports.
  • the channel state information between the coordinated cell and the user equipment may be specifically obtained according to the following method:
  • CSI-RS pilot sequence
  • the cell-specific pilot sequence may be specifically obtained according to the following method: calculating, according to the identifier of the coordinated cell, a cell-specific pilot offset of the coordinated cell; according to the cell-specific pilot offset, Determining the service data, by the coordinated cell The corresponding subframe in which the CRS interferes with the service data;
  • the embodiment of the present invention does not limit the specific process of obtaining the above parameters.
  • the method for obtaining a cell-specific pilot sequence may be as follows:
  • the local sequence Cinit of the corresponding subframe is initialized according to the following formula:
  • a set of cell-specific pilot sequences is uniquely determined according to different initial values Cinit .
  • the cell identifier (ID) involved in the foregoing process may be obtained by the base station of the serving cell where the user equipment is located in the networking, or may be obtained by the user equipment and the serving cell base station after the networking.
  • the serving cell may notify the user equipment of the coordinated cell with the CRS interference before the user equipment receives the service data or when the service data is received, so that the user equipment calculates and obtains the channel state information according to the identifier of the coordinated cell that has CRS interference. CRS sequence.
  • the user equipment receives information such as the identifier of the coordinated cell sent by the serving cell base station.
  • the embodiment of the present invention may eliminate the CRS included in the service data based on the foregoing parameters.
  • the CRS can be specifically eliminated according to the following calculation formula:
  • the Y is the service data that is currently received by the user equipment, including the coordinated cell CRS;
  • the Hu is the channel state information between the user equipment and the serving cell;
  • the precoding matrix is the serving cell for the user equipment;
  • Original service sent to the user equipment for the serving cell The data, that is, the service data that the user equipment finally needs to obtain and does not have any interference;
  • the Hpi is channel state information between the i-th cooperative cell and the user equipment that has CRS interference;
  • the Pi is the i-th existing CRS interference.
  • ⁇ Hp i may be one or a plurality of sums depending on the number of cooperating cells that have CRS interference to the serving cell.
  • the PDSCH of the serving cell may also cause interference to the user equipment of the serving cell when receiving the service data. Therefore, in the embodiment of the present invention, various interferences that may exist in the service data may be eliminated based on the following formula:
  • Y is service data received by the user equipment
  • Hu is channel state information between the user equipment and the serving cell
  • the precoding matrix is used by the serving cell for the user equipment
  • the Si is the original service data sent by the serving cell to the user equipment
  • the i is the channel state information between the i-th cooperative cell and the user equipment with PDSCH interference
  • Wi is the pre-prepared by the i-th cooperative cell with PDSCH interference.
  • & is the service data transmitted by the PDSCH of the i-th cooperative cell with PDSCH interference
  • the Hpi is channel state information between the i-th cooperative cell and the user equipment with CRS interference
  • the Pi is the i-th Cell-specific pilot sequences of coordinated cells that interfere with CRS.
  • ZHuWiSi may be one, or multiple, depending on the number of cooperating cells that have PDSCH interference to the serving cell.
  • the service data received by the user equipment may have CRS interference of the adjacent coordinated cell and/or PDSCH interference of the adjacent coordinated cell except for white noise, if only If there is PDSCH interference of the adjacent coordinated cell, the XHpiPi term is not needed in Equation 3.
  • the UE directly removes the PDSCH interference in the received service data. If there is only CRS interference of the adjacent coordinated cell, the ZHUWiSi term is not needed in Equation 3.
  • the UE can directly remove the CRS interference in the received service data.
  • FIG. 4 For the sake of understanding, the networking scenario shown in FIG. 4 is taken as an example for the embodiment of the present invention. A detailed description of the line.
  • the serving cell includes a user equipment UE that receives service data
  • the coordinated cell is an adjacent interfering cell of the serving cell.
  • the serving cell and the coordinated cell have four physical antennas, two CRS antenna ports, and two receiving antennas.
  • the embodiment of the present invention may specifically include the following steps:
  • Step 1 mapping the four physical antennas of the serving cell and the coordinated cell to the antenna ports portO and portl for CRS transmission, wherein the physical antennas 0 ⁇ 1 are mapped to portO, and the physical antennas 2 ⁇ 3 are mapped to portl.
  • Step 2 The serving cell informs the UE that the coordinated cell has CRS interference, and needs to report the channel state information of the coordinated cell.
  • Step 3 The UE receives the service data Y.
  • Step 4 The UE measures channel state information Hp between the UE and the coordinated cell.
  • the UE may calculate, according to the identifier (ID) of the coordinated cell, a pilot sequence used to estimate channel state information between the coordinated cell and the user equipment;
  • Channel state information between the coordinated cell and the user equipment is measured according to the pilot sequence.
  • the UE may also report the interference channel exceeding the measurement threshold to the serving cell, and the serving cell and the coordinated cell interact to calculate a precoding matrix W that can suppress downlink physical channel interference.
  • Step 5 The UE calculates a CRS sequence of the coordinated cell.
  • the UE may calculate a cell-specific pilot offset of the coordinated cell according to the coordinated cell identifier.
  • Step 6 the UE cancels the coordinated cell CRS interference existing in the received service data according to the channel state information Hp obtained in step 4 and the cell-specific pilot sequence P acquired in step 5.
  • the UE may use the formula 2 or the formula 3 to eliminate the CRS interference of the coordinated cell based on whether there is a coordinated cell PDSCH interference in the service data, and restore the initial service data that does not include any interference.
  • the number of physical antennas of the serving cell and the coordinated cell is eight, the number of CRS ports is two, and the number of receiving antennas is two.
  • the eight physical antennas of the serving cell and the coordinated cell may be mapped to the antenna ports portO and port1 respectively for CRS transmission, wherein the physical antennas 0 ⁇ 3 are mapped to the portO, and the physical antennas 4 ⁇ 7 are mapped. Go to portl.
  • the subsequent operations are similar to the above steps 1 to 6, and therefore will not be described again.
  • the downlink service transmission method for inter-cell interference suppression receives service data by a user equipment in the serving cell, where the service data includes collaboration with the serving cell.
  • a cell that is, a cell-specific pilot that is transmitted by the interfering cell through a preset cell-specific pilot antenna port, and is used by the user equipment according to channel state information and a cell-specific pilot sequence between the coordinated cell and the user equipment,
  • the cell specific pilot included in the service data is eliminated, so that the quality of the service data received by the user can be ensured.
  • the application of the embodiment of the present invention does not change the physical layer protocol, and ensures compatibility with users of the LTE R8 version.
  • the coordinated cell sends the CRS only through the preset 1 or 2 antenna ports, thereby reducing the number of ports of the CRS, thereby reducing the resource occupation used by the UE for channel estimation, and is beneficial to advanced long-term.
  • the UE of the evolved (LTE-Adv: Long Term Evolution) performs interference cancellation of the CRS.
  • the quality of the service data is ensured, so that the receiver, that is, the signal to interference plus noise ratio of the UE can be improved (SINR: Signal to Interference plus Noise Ratio ), improve the throughput of cell edge UEs, enabling edge users to use high-order modulation.
  • the embodiment of the present invention further provides a downlink service transmission apparatus for inter-cell interference suppression.
  • the apparatus may specifically include:
  • the receiving module 51 is configured to receive service data, where the service data includes a cell-specific pilot (CRS) sent by the coordinated cell by using a preset antenna port;
  • CRS cell-specific pilot
  • the eliminating module 52 is configured to cancel the cell-specific pilot included in the service data according to channel state information between the coordinated cell and the user equipment and a cell-specific pilot sequence.
  • the implementation of the foregoing apparatus provided by the embodiment of the present invention can eliminate the cooperative cell CRS existing in the service data, thereby ensuring the quality of the service data received by the user equipment.
  • the system is applied to the nodes in the high-level LTE scenario, that is, the cell must deliver the CRS in the normal downlink subframe, so that the UE that is applied to the LTE R8 version can communicate normally.
  • the UE applied to the LTE R8 version needs to be demodulated by the CRS.
  • the number of pilots of the CRS should be minimized, because the demodulated data of the UE applied to the LTE R10 version is estimated by the DeModulation Reference Signal (DMRS).
  • DMRS DeModulation Reference Signal
  • the CRS and the physical downlink shared channel (PDSCH) of the neighboring cell interfere with each other, the channel state information (CSI) of the channel estimated by the CRS is also affected by the interference, and therefore, the cooperation involved in the embodiment of the present invention
  • the CRS can be sent only on one or two preset antenna ports.
  • the coordinated cell preferably presets two antenna ports.
  • the elimination module 52 may specifically include:
  • a first calculating unit 521 configured to calculate, according to an identifier of the coordinated cell, an estimated coordinated cell a pilot sequence (CSI-RS) of channel state information with the user equipment;
  • CSI-RS pilot sequence
  • the measuring unit 522 is configured to measure channel state information between the coordinated cell and the user equipment according to the pilot sequence.
  • the elimination module 52 may specifically include:
  • a second calculating unit 523 configured to calculate, according to the identifier of the coordinated cell, a cell-specific pilot offset of the coordinated cell
  • a first determining unit 524 configured to determine, according to the cell-specific pilot offset, a corresponding subframe in which the service data interfered by the coordinated cell CRS is located in the service data;
  • the second determining unit 525 is configured to determine the cell-specific pilot sequence according to the local sequence of the corresponding subframe.
  • the identifier of the coordinated cell involved in the foregoing process may be that the user equipment is notified to the user equipment by the base station of the serving cell at the time of the networking, or may be obtained by the user equipment and the serving cell base station after the networking.
  • the receiving module 51 may be further configured to receive information such as an identifier of the coordinated cell sent by a serving cell base station.
  • the embodiment of the present invention can eliminate the CRS included in the service data based on the above parameters.
  • the CRS can be specifically eliminated according to the calculation formula (2) or (3).
  • the downlink service transmission apparatus for inter-cell interference suppression receives service data by a user equipment in the serving cell, where the service data includes collaboration with the serving cell. a cell, that is, a cell-specific pilot that is transmitted by the interfering cell through a preset cell-specific pilot antenna port, and is used by the user equipment according to channel state information and a cell-specific pilot sequence between the coordinated cell and the user equipment, Eliminating the cell specific pilot included in the service data, thereby ensuring quality of service data received by the user the amount.
  • the application of the embodiment of the present invention does not change the physical layer protocol, and ensures compatibility with users of the LTE R8 version.
  • the coordinated cell sends the CRS only through the preset 1 or 2 antenna ports, thereby reducing the number of ports of the CRS, thereby reducing the resource occupation used by the UE for channel estimation, and is beneficial to advanced long-term.
  • the UE of the evolved (LTE-Adv: Long Term Evolution) performs interference cancellation of the CRS.
  • the quality of the service data is ensured, so that the receiver, that is, the signal to interference plus noise ratio (SINR) of the UE can be improved, and the throughput of the cell edge UE is improved, and the edge is increased. It is possible for users to use higher order modulation.
  • SINR signal to interference plus noise ratio

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Abstract

本发明提供了一种小区间干扰抑制的下行业务传输方法，包括：用户设备接收业务数据；其中，所述业务数据中包含协作小区通过预设的天线端口发送的小区特定导频；用户设备根据所述协作小区与所述用户设备间的信道状态信息、以及小区特定导频序列，消除所述业务数据中包含的所述小区特定导频。本发明还提供了一种小区间干扰抑制的下行业务传输装置，运用所述方法和装置可消除下行业务数据中的相邻小区，即协作小区的小区特定导频。

Description

小区间干扰抑制的下行业务传输方法及装置 技术领域
本发明涉及多天线通信系统中协作多点传输的业务数据传输技术领 域， 具体涉及一种小区间干扰抑制的下行业务传输方法及装置。 背景技术
协作多点 （CoMP， Coordinate Multi-Point )传输是一种提高小区边缘 服务质量和吞吐量， 以及系统吞吐量的技术， 成为提高系统频谱利用率的 重要技术， 因此得到了广泛的关注。 所谓协作多点传输， 即多个节点， 即 多个小区协作传输， 服务于一个或多个用户终端 （UE )。
第三代合作伙伴计划 （ 3GPP )定义的 CoMP包括 2种场景， 一种是多 点协作调度 /协作波束赋形 （ CS/CB: Coordinated scheduling and coordinated beamforming ), 即通过相邻节点之间交互调度信息，达到各个节点传输信号 之间的干扰得到协调； 另一种是多点联合处理， 即多个协作节点之间通过 共享数据及信道状态信息 （CSI: channel State information )、 调度信息等， 联合为目标用户提供服务。联合波束形成的协作多点传输属于第一种 CoMP 场景。
在上述多点协作调度 /协作波束赋形场景中， 在已知干扰信道和信号信 道的状态之后， 各小区， 即节点可以通过预编码的方法实现各小区物理下 行共享信道（PDSCH: Physical Downlink Shared Channel ) 的相互避让。 但 是由于长期演进项目 （LTE: Long Term Evolution )各版本要保持向后兼容， 例如 LTE R10版本需要兼容 LTE R8版本， 因此，各小区的下行子帧中一定 会存在小区特定导频 （CRS: Cell Specific Reference Signal, 也可称之为小 区专用参考信号），而各小区下行子帧中存在的 CRS将对能够接收到该小区 信号的相邻小区， 即协作小区的物理下行共享信道产生强干扰， 从而影响 邻近小区中 UE使用 PDSCH接收下行业务数据质量。 一小区与相邻小区之 间信号干扰的示意图可如附图 1 所示， 其中， 位于中间的小区的用户设备
( UE ) 能够接收虚线所示的相邻小区的信号干扰。
以多点协作调度 /协作波束赋形场景中， 存在三个协作小区为例， 如附 图 2所示，三个小区的 CRS在频域上占满了 CRS所在的正交频分复用技术
( OFDM: Orthogonal Frequency Division Multiplexing )符号， 图 2中三个 协作小区的小区标识（ID )分别为 0、 1、 2， 其中， 标记为 21的区域为小 区标识 ID=0的协作小区所发送的 CRS所在的载波， 标记为 22的区域为小 区标识 ID=1的协作小区所发送的 CRS所在的载波， 标记为 23的区域为小 区标识 ID=2的协作小区所发送的 CRS所在的载波。 假设各协作小区均配 置两个天线，则一个资源块（RB: Resource Block )上有 24个资源单元（RE: Resource Element, 资源单元 )会受到邻区 CRS干扰。
因此， 在 CoMP所包括的多点协作调度 /协作波束赋形场景中， 如何消 除各小区下行业务数据， 即子帧中存在的 CRS对邻近小区的 PDSCH的干 扰， 成为有待解决的问题。 发明内容
本发明所要解决的技术问题是提供一种小区间干扰抑制的下行业务传 输方法及装置， 从而消除下行业务数据中的相邻小区， 即协作小区的小区 特定导频。
为解决上述技术问题， 本发明提供方案如下：
本发明实施例提供了一种小区间干扰抑制的下行业务传输方法， 包括： 用户设备接收业务数据， 所述业务数据中包含协作小区通过预设的天 线端口发送的小区特定导频；
用户设备根据所述协作小区与所述用户设备间的信道状态信息以及小 区特定导频序列， 消除所述业务数据中包含的所述小区特定导频。
优选的， 所述方法中， 所述协作小区预设发送小区特定导频的天线端 口为 1个、 或 2个。
优选的， 所述方法中， 在接收业务数据之前还包括：
所述用户设备接收服务小区基站发送的所述协作小区的标识。
优选的， 所述方法中， 所述协作小区与所述用户设备间的信道状态信 息的获取过程为：
根据所述协作小区的标识， 计算用于估计所述协作小区与所述用户设 备间的信道状态信息的导频序列；
根据所述导频序列， 测量所述协作小区与所述用户设备间的信道状态 信息。
优选的， 所述方法中， 所述小区特定导频序列的获取过程为： 根据所述协作小区的标识， 计算所述协作小区的小区特定导频偏移量； 根据所述小区特定导频偏移量， 确定所述业务数据中， 受所述协作小 区的小区特定导频干扰的业务数据所在的对应子帧；
根据所述对应子帧的本地序列， 确定所述小区特定导频序列。
优选的， 所述方法中， 所述用户设备根据所述协作小区与所述用户设 备间的信道状态信息以及小区特定导频序列， 消除所述业务数据中包含的 所述小区特定导频包括：
根据计算公式： Y:!^1^ ^!^!^ , 消除所述业务数据中所述协作小 区的小区特定导频；
其中， 所述 Υ为所述用户设备接收的业务数据； 所述 Hu为所述用户 设备与所述服务小区间的信道状态信息；所述 为所述服务小区针对所述 用户设备的预编码矩阵； 所述 Si为所述服务小区向所述用户设备发送的原 始业务数据； 所述 Hpi为第 i个存在小区特定导频干扰的协作小区与所述用 户设备间的信道状态信息； 所述 Pi为第 i个存在小区特定导频干扰的协作 小区的小区特定导频序列。
优选的， 所述方法中， 所述用户设备根据所述协作小区与所述用户设 备间的信道状态信息以及小区特定导频序列， 消除所述业务数据中包含的 所述小区特定导频为：
根据计算公式： 丫二！^^^^^ ^ &十^ !^^， 消除所述业务数据中 所述协作小区的小区特定导频；
其中， 所述 Y为所述用户设备接收的业务数据； 所述 Hu为所述用户 设备与所述服务小区间的信道状态信息；所述 为所述服务小区针对所述 用户设备的预编码矩阵； 所述 Si为所述服务小区向所述用户设备发送的原 始业务数据； 所述 HH是第 i个存在物理下行共享信道干扰的协作小区和用 户设备间的信道状态信息； Wi是第 i个存在物理下行共享信道干扰的协作 小区采用的预编码矩阵； &为第 i个存在物理下行共享信道干扰的协作小区 的物理下行共享信道所传输的业务数据； 所述 Hpi为第 i个存在小区特定导 频干扰的协作小区与所述用户设备间的信道状态信息； 所述 Pi为第 i个在 小区特定导频干扰的协作小区的小区特定导频序列。
本发明实施例还提供了一种小区间干扰抑制的下行业务传输装置， 包 括：
接收模块， 用于用户设备接收业务数据， 所述业务数据中包含协作小 区通过预设的天线端口发送的小区特定导频；
消除模块， 用于用户设备根据所述协作小区与所述用户设备间的信道 状态信息以及小区特定导频序列， 消除所述业务数据中包含的所述小区特 定导频。
优选的， 所述装置中， 所述接收模块， 还用于用户设备接收服务小区 基站发送的所述协作小区的标识。 优选的， 所述装置中， 所述消除模块包括：
第一计算单元， 用于根据所述协作小区的标识， 计算用于估计所述协 作小区与所述用户设备间的信道状态信息的导频序列；
测量单元， 用于根据所述导频序列， 测量所述协作小区与所述用户设 备间的信道状态信息。
优选的， 所述装置中， 所述消除模块包括：
第二计算单元， 用于根据所述协作小区的标识， 计算所述协作小区的 小区特定导频偏移量；
第一确定单元， 用于根据所述小区特定导频偏移量， 确定所述业务数 据中， 受所述协作小区的小区特定导频干扰的业务数据所在的对应子帧； 第二确定单元， 用于根据所述对应子帧的本地序列， 确定所述小区特 定导频序列。
优选的， 所述装置中， 所述消除模块， 用于根据计算公式：
Figure imgf000007_0001
,消除所述业务数 据中所述协作小区的小区特定导频；
其中， 所述 Y为所述用户设备接收的业务数据； 所述 Hu为所述用户 设备与所述服务小区间的信道状态信息；所述 为所述服务小区针对所述 用户设备的预编码矩阵； 所述 Si为所述服务小区向所述用户设备发送的原 始业务数据； 所述 Hpi为第 i个存在小区特定导频干扰的协作小区与所述用 户设备间的信道状态信息； 所述 Pi为第 i个在小区特定导频干扰的协作小 区的小区特定导频序列； 所述 是第 i个存在物理下行共享信道干扰的协 作小区和用户设备间的信道状态信息； Wi是第 i个存在物理下行共享信道 干扰的协作小区采用的预编码矩阵； Si为第 i个存在物理下行共享信道干扰 的协作小区的物理下行共享信道所传输的业务数据。
从以上所述可以看出， 本发明提供的小区间干扰抑制的下行业务传输 方法及装置， 通过由服务小区内的一用户设备接收业务数据， 所述业务数 据中包含与服务小区相邻的协作小区即干扰小区通过预设的小区特定导频 天线端口发送的小区特定导频； 并由所述用户设备根据所述协作小区与所 述用户设备间的信道状态信息以及小区特定导频序列， 消除所述业务数据 中包含的所述小区特定导频， 从而可以确保用户接收的业务数据的质量。 附图说明
图 1为现有技术中小区间信号干扰示意图一；
图 2为现有技术中小区间信号干扰示意图二；
图 3 为本发明实施例提供的小区间干扰抑制的下行业务传输方法流程 示意图；
图 4为本发明实施例提供的小区间干扰抑制的下行业务传输方法应用 场景示意图；
图 5 为本发明实施例提供的小区间干扰抑制的下行业务传输装置结构 示意图；
图 6为本发明实施例提供的小区间干扰抑制的下行业务传输装置中消 除模块结构示意图。 具体实施方式 本发明实施例提供了一种小区间干扰抑制的下行业务传输方法， 如附 图 3所示， 该方法具体可以包括以下步骤：
步骤 31， 用户设备接收业务数据， 所述业务数据中包含协作小区通过 预设的天线端口发送的小区特定导频；
步骤 32， 所述用户设备根据所述协作小区与所述用户设备间的信道状 态信息以及小区特定导频序列， 消除所述业务数据中包含的所述小区特定 导频。 本发明实施例提供的上述方法的实现， 可以消除业务数据中存在的协 作小区的 CRS， 从而可以确保用户设备接收业务数据的质量。
本发明实施例提供的上述方法， 具体可应用于包括一个服务小区和至 少一个协作小区的协作多点传输系统中， 且所述服务小区内包括至少一个 用户设备， 所述协作小区为所述服务小区相邻的干扰小区。
为了保持与后续版本， 例如 LTE R8版本的兼容性， 应用于高版本 LTE 场景中的节点， 即小区在普通下行子帧一定要下发 CRS， 这样可保证应用 于 LTE R8版本的 UE可以正常通讯， 所述应用于 LTE R8版本中的 UE需 要通过 CRS进行解调。 为了减少导频开销和接收端的复杂度， 应该尽量减 少 CRS的导频数量， 因为应用于 LTE R10版本的 UE解调数据是通过解调 导频（DMRS， DeModulation Reference Signal )估计等效信道来实现的， 同 时由于 CRS与邻区的物理下行共享信道（PDSCH )会相互干扰， 因此通过 CRS估计信道的信道状态信息（CSI )也会受到干扰的影响， 因此， 本发明 实施例中所涉及的协作小区即便实际采用的天线数为 4或 8，也可以仅在预 设的一个或两个天线端口上发送 CRS， 为了确保广播、 控制信息的接收， 协作小区以预设两个天线端口为佳。
在本发明实施例中， 协作小区与用户设备间的信道状态信息具体可以 基于以下方法获取：
根据协作小区的标识， 计算用于估计所述协作小区与所述用户设备间 的信道状态信息的导频序列 （CSI-RS );
根据所述导频序列， 测量所述协作小区与所述用户设备间的信道状态 信息。
在本发明实施例中， 小区特定导频序列具体可以基于以下方法获取： 根据协作小区的标识， 计算所述协作小区的小区特定导频偏移量； 根据所述小区特定导频偏移量， 确定所述业务数据中， 受协作小区的 CRS干扰的业务数据所在的对应子帧；
根据所述对应子帧的本地序列， 确定所述小区特定导频序列。
由于信道状态信息以及 CRS序列计算获取过程比较成熟， 因此， 本发 明实施例其实并不限制获取上述参数的具体过程。
在一个具体实施例中， 获取小区特定导频序列的方法可如下所示： 对应子帧的本地序列 Cinit按照下式进行初始化：
cmit = 210 . (7 - (ns + 1)+ / + 1). (2 · N^1 + 1)+ 2 · N^1 + NCP ( 1 ) 其中 是时隙编号； /是 OFDM编号； 是小区 ID; NCT是小区的循 环前缀 ( CP, Cyclic Prefix )类型;
根据不同的初始值 Cinit唯一确定一组小区特定导频序列。
上述过程所涉及的小区标识（ ID )， 可以是在组网当初由用户设备所在 的服务小区的基站告知用户设备， 也可以是组网之后， 用户设备与服务小 区基站交互获取的。 另外， 服务小区可以在用户设备接收业务数据之前或 者正在接收业务数据时， 将存在 CRS干扰的协作小区告知用户设备， 以便 用户设备根据存在 CRS干扰的协作小区的标识， 计算获取上述信道状态信 息和 CRS序列。
那么可以看出， 本发明实施例中， 还可以包括以下处理步骤： 用户设 备接收服务小区基站发送的述协作小区的标识等信息。
在获取信道状态信息 Hp以及小区特定导频序列 P后，本发明实施例可 以基于上述参数， 消除所述业务数据中包含的 CRS。
在一个具体实施例中， 具体可以根据下述计算公式消除 CRS:
Figure imgf000010_0001
其中， 所述 Y为用户设备当前接收的包括协作小区 CRS的业务数据； 所述 Hu为用户设备与服务小区间的信道状态信息； 所述 为服务小区针 对用户设备的预编码矩阵； 所述 Si为服务小区向用户设备发送的原始业务 数据， 即用户设备最终所要获取的、 不存在任何干扰的业务数据； 所述 Hpi 为第 i个存在 CRS干扰的协作小区与用户设备间的信道状态信息； 所述 Pi 为第 i个存在 CRS干扰的协作小区的小区特定导频序列。 而且， ∑Hp i可 以是一项， 也可以是多项的和， 这取决于对服务小区存在 CRS干扰的协作 小区的数量。
由于协助小区的 PDSCH也可能对服务小区的用户设备在接收业务数 据时造成干扰， 因此， 本发明实施例中， 还可以基于下述公式消除业务数 据中可能存在的各种干扰：
Figure imgf000011_0001
XHiiWSi +∑Hp i ( 3 ) 其中， 所述 Y为用户设备接收的业务数据； 所述 Hu为用户设备与服 务小区间的信道状态信息； 所述 为服务小区针对用户设备的预编码矩 阵； 所述 Si为服务小区向用户设备发送的原始业务数据； 所述 i是第 i 个存在 PDSCH干扰的协作小区和用户设备间的信道状态信息； Wi是第 i 个存在 PDSCH干扰的协作小区采用的预编码矩阵； &为第 i个存在 PDSCH 干扰的协作小区的 PDSCH所传输的业务数据； 所述 Hpi为第 i个存在 CRS 干扰的协作小区与用户设备间的信道状态信息； 所述 Pi为第 i个在 CRS干 扰的协作小区的小区特定导频序列。 而且， ZHuWiSi可能是一项， 也可能 是多项和， 这取决于对服务小区存在 PDSCH干扰的协作小区的数量。
那么可以看出， 对某一载波处的业务数据而言， 用户设备接收的业务 数据除了白噪声，还可能会有相邻协作小区的 CRS干扰和 /或相邻协作小区 的 PDSCH干扰， 如果仅有相邻协作小区的 PDSCH干扰， 则公式 3中无需 XHpiPi项， UE直接去除接收的业务数据中的 PDSCH干扰即可； 如果仅有 相邻协作小区的 CRS干扰， 则公式 3中无需 ZHuWiSi项， UE直接去除接 收的业务数据中的 CRS干扰即可。
为了便于理解， 下面以附图 4所示的组网场景为例， 对本发明实施例 行详细的描述。 附图 4 中， 具体存在一个服务小区和一个协作小区， 该服 务小区中包括一接收业务数据的用户设备 UE, 所述协作小区即为所述服务 小区相邻的干扰小区。
在一个具体实施例中， 服务小区和协作小区的物理天线为 4个， CRS 天线端口数均为 2个， 接收天线为 2个。 本发明实施例具体可以包括以下 步骤：
步骤 1， 将服务小区和协作小区的 4个物理天线分别映射到天线端口 portO和 portl上进行 CRS的发送， 其中物理天线 0~1映射到 portO上， 物 理天线 2~3映射到 portl上。
步骤 2， 服务小区通知 UE协作小区存在 CRS干扰， 需要上报协作小 区的信道状态信息。
步骤 3， UE接收业务数据 Y。
该业务数据 Υ中， 存在协作小区通过端口 portO和 portl发送的 CRS。 步骤 4， UE测量 UE与所述协作小区间的信道状态信息 Hp 。
具体的， UE 可以根据协作小区的标识（ID )， 计算用于估计协作小区 与用户设备间的信道状态信息的导频序列；
根据所述导频序列， 测量协作小区与用户设备间的信道状态信息。 此步骤中， UE还可以将超过测量门限的干扰信道上报给服务小区， 服 务小区与协作小区间通过交互， 计算可以抑制下行物理信道干扰的预编码 矩阵 W。
步骤 5， UE计算协作小区的 CRS序列。
具体的， UE可以根据协作小区标识， 计算协作小区的小区特定导频偏 移量；
UE根据小区特定导频偏移量， 确定接收的业务数据中， 受协作小区 CRS干扰的业务数据所在的对应子帧；
根据所述对应子帧的本地序列， 确定小区特定导频序列 P。
步骤 6， UE根据步骤 4获取的信道状态信息 Hp， 以及步骤 5中获取的 小区特定导频序列 P， 消除接收的业务数据中存在的协作小区 CRS干扰。
具体的， UE可以基于业务数据中是否存在协作小区 PDSCH干扰， 利 用公式 2或公式 3来消除协作小区的 CRS干扰， 还原不包括任何干扰的初 始业务数据。
在基于附图 4场景下的另一个实施例中， 假设服务小区和协作小区的 物理天线为 8个， CRS端口数均为 2个， 接收天线为 2个。 则在此实施例 中， 可以将服务小区和协作小区的 8个物理天线分别映射到天线端口 portO 和 portl上进行 CRS的发送， 其中物理天线 0~3映射到 portO上， 物理天线 4~7映射到 portl上。 而后续操作与上述步骤 1至 6类似， 因此不再赘述。
从以上所述可以看出， 本发明实施例提供的小区间干扰抑制的下行业 务传输方法， 通过由服务小区内的一个用户设备接收业务数据， 所述业务 数据中包含与服务小区相邻的协作小区， 即干扰小区通过预设的小区特定 导频天线端口发送的小区特定导频， 并由所述用户设备根据所述协作小区 与所述用户设备间的信道状态信息以及小区特定导频序列， 消除所述业务 数据中包含的所述小区特定导频， 从而可以确保用户接收的业务数据的质 量。 而且， 本发明实施例的应用， 不改变物理层协议， 保证对 LTE R8版本 用户的兼容性。
另外， 本发明实施例中， 协作小区仅通过预设的 1或 2个天线端口发 送 CRS， 因此减少了 CRS的端口数， 从而减小 UE用于信道估计的资源占 用， 同时有利于先进的长期演进（LTE-Adv: Long Term Evolution ) 的 UE 进行 CRS的干扰消除。 此外， 本发明实施例中确保了业务数据的质量， 因 此可以提高接收机， 即 UE 的信号与干扰加噪声比 （SINR: Signal to Interference plus Noise Ratio )， 提高小区边缘 UE的吞吐量， 使边缘用户使 用高阶调制成为可能。
基于本发明实施例提供的小区间干扰抑制的下行业务传输方法， 本发 明实施例还提供了一种小区间干扰抑制的下行业务传输装置， 如附图 5 所 示， 该装置具体可以包括：
接收模块 51， 用于接收业务数据， 所述业务数据中包含所述协作小区 通过预设的天线端口发送的小区特定导频（CRS );
消除模块 52， 用于根据所述协作小区与所述用户设备间的信道状态信 息以及小区特定导频序列， 消除所述业务数据中包含的所述小区特定导频。
本发明实施例提供的上述装置的实现， 可以消除业务数据中存在的协 作小区 CRS， 从而可以确保用户设备接收业务数据的质量。
为了保持与后续版本， 例如 LTE R8版本的兼容性， 应用于高版本 LTE 场景中的节点， 即小区在普通下行子帧一定要下发 CRS， 这样可保证应用 于 LTE R8版本的 UE可以正常通讯， 所述应用于 LTE R8版本中的 UE需 要通过 CRS进行解调。 为了减少导频开销和接收端的复杂度， 应该尽量减 少 CRS的导频数量， 因为应用于 LTE R10版本的 UE解调数据是通过解调 导频（DMRS， DeModulation Reference Signal )估计等效信道来实现的， 同 时由于 CRS与邻区的物理下行共享信道（PDSCH )会相互干扰， 因此通过 CRS估计信道的信道状态信息（CSI )也会受到干扰的影响， 因此， 本发明 实施例中所涉及的协作小区即便实际采用的天线数为 4或 8，也可以仅在预 设的一个或两个天线端口上发送 CRS， 为了确保广播、 控制信息的接收， 协作小区以预设两个天线端口为佳。
在本发明一个可选实施例中， 如附图 6所示， 消除模块 52具体可以包 括：
第一计算单元 521， 用于根据协作小区的标识， 计算用于估计协作小区 与用户设备间的信道状态信息的导频序列 （ CSI-RS );
测量单元 522， 用于根据所述导频序列， 测量协作小区与用户设备间的 信道状态信息。
在本发明一个可选实施例中， 如附图 6所示， 消除模块 52具体还可以 包括：
第二计算单元 523， 用于根据协作小区的标识， 计算所述协作小区的小 区特定导频偏移量；
第一确定单元 524， 用于根据所述小区特定导频偏移量， 确定所述业务 数据中， 受协作小区 CRS干扰的业务数据所在的对应子帧；
第二确定单元 525， 用于根据所述对应子帧的本地序列， 确定所述小区 特定导频序列。
上述过程所涉及的协作小区的标识， 可以是在组网当初由用户设备所 在服务小区的基站告知用户设备， 也可以是组网之后， 用户设备与服务小 区基站交互获取的。
在本发明实施例一个可选实施例中， 所述接收模块 51， 还可以用于接 收服务小区基站发送的所述协作小区的标识等信息。
在获取信所述信道状态信息 Hp以及小区特定导频序列 P后，本发明实 施例可以基于上述参数， 消除所述业务数据中包含的 CRS。
在一个具体实施例中， 具体可以根据计算公式（2 )或（3 )消除 CRS。 从以上所述可以看出， 本发明实施例提供的小区间干扰抑制的下行业 务传输装置， 通过由服务小区内的一个用户设备接收业务数据， 所述业务 数据中包含与服务小区相邻的协作小区， 即干扰小区通过预设的小区特定 导频天线端口发送的小区特定导频， 并由所述用户设备根据所述协作小区 与所述用户设备间的信道状态信息以及小区特定导频序列， 消除所述业务 数据中包含的所述小区特定导频， 从而可以确保用户接收的业务数据的质 量。 而且， 本发明实施例的应用， 不改变物理层协议， 保证对 LTE R8版本 用户的兼容性。
另外， 本发明实施例中， 协作小区仅通过预设的 1或 2个天线端口发 送 CRS， 因此减少了 CRS的端口数， 从而减小 UE用于信道估计的资源占 用， 同时有利于先进的长期演进（LTE-Adv: Long Term Evolution ) 的 UE 进行 CRS的干扰消除。 此外， 本发明实施例中确保了业务数据的质量， 因 此可以提高接收机， 即 UE 的信号与干扰加噪声比 （SINR: Signal to Interference plus Noise Ratio )， 提高小区边缘 UE的吞吐量， 使边缘用户使 用高阶调制成为可能。
以上所述仅是本发明的实施方式， 应当指出， 对于本技术领域的普通 技术人员来说， 在不脱离本发明原理的前提下， 还可以作出若干改进和润 饰， 这些改进和润饰也应视为本发明的保护范围。

Claims

权利要求书
1、 一种小区间干扰抑制的下行业务传输方法， 其特征在于， 该方法包 括：
用户设备接收业务数据；
其中， 所述业务数据中包含协作小区通过预设的天线端口发送的小区 特定导频；
用户设备根据所述协作小区与所述用户设备间的信道状态信息、 以及 小区特定导频序列， 消除所述业务数据中包含的所述小区特定导频。
2、 根据权利要求 1所述的方法， 其特征在于， 所述协作小区的预设发 送小区特定导频的天线端口为 1个、 或 2个。
3、 根据权利要求 1所述的方法， 其特征在于， 所述用户设备接收业务 数据之前， 该方法还包括：
所述用户设备接收服务小区基站发送的所述协作小区的标识。
4、 根据权利要求 3所述的方法， 其特征在于， 所述协作小区与所述用 户设备间的信道状态信息的获取过程为：
根据所述协作小区的标识， 计算用于估计所述协作小区与所述用户设 备间的信道状态信息的导频序列；
根据所述导频序列， 测量所述协作小区与所述用户设备间的信道状态 信息。
5、 根据权利要求 4所述的方法， 其特征在于， 所述小区特定导频序列 的获取过程为：
根据所述协作小区的标识， 计算所述协作小区的小区特定导频偏移量； 根据所述小区特定导频偏移量， 确定所述业务数据中， 受所述协作小 区的小区特定导频干扰的业务数据所在的对应子帧；
根据所述对应子帧的本地序列， 确定所述小区特定导频序列。
6、 根据权利要求 5所述的方法， 其特征在于， 所述用户设备根据所述 协作小区与所述用户设备间的信道状态信息、 以及小区特定导频序列， 消 除所述业务数据中包含的所述小区特定导频， 为：
根据计算公式： Y:!^1^ ^!^!^ , 消除所述业务数据中所述协作小 区的小区特定导频；
其中， 所述 Υ为所述用户设备接收的业务数据； 所述 Hu为所述用户 设备与所述服务小区间的信道状态信息；所述 为所述服务小区针对所述 用户设备的预编码矩阵； 所述 Si为所述服务小区向所述用户设备发送的原 始业务数据； 所述 Hpi为第 i个存在小区特定导频干扰的协作小区与所述用 户设备间的信道状态信息； 所述 Pi为第 i个存在小区特定导频干扰的协作 小区的小区特定导频序列。
7、 根据权利要求 5所述的方法， 其特征在于， 所述用户设备根据所述 协作小区与所述用户设备间的信道状态信息、 以及小区特定导频序列， 消 除所述业务数据中包含的所述小区特定导频， 为：
根据计算公式： Y:!^1^ ^!^1^^ ^!^^ , 消除所述业务数据中 所述协作小区的小区特定导频；
其中， 所述 Y为所述用户设备接收的业务数据； 所述 Hu为所述用户 设备与所述服务小区间的信道状态信息；所述 为所述服务小区针对所述 用户设备的预编码矩阵； 所述 Si为所述服务小区向所述用户设备发送的原 始业务数据； 所述 HH是第 i个存在物理下行共享信道干扰的协作小区和用 户设备间的信道状态信息； Wi是第 i个存在物理下行共享信道干扰的协作 小区采用的预编码矩阵； &为第 i个存在物理下行共享信道干扰的协作小区 的物理下行共享信道所传输的业务数据； 所述 Hpi为第 i个存在小区特定导 频干扰的协作小区与所述用户设备间的信道状态信息； 所述 Pi为第 i个在 小区特定导频干扰的协作小区的小区特定导频序列。
8、 一种小区间干扰抑制的下行业务传输装置， 其特征在于， 该装置包 括：
接收模块， 用于用户设备接收业务数据；
其中， 所述业务数据中包含协作小区通过预设的天线端口发送的小区 特定导频；
消除模块， 用于用户设备根据所述协作小区与所述用户设备间的信道 状态信息、 以及小区特定导频序列， 消除所述业务数据中包含的所述小区 特定导频。
9、 根据权利要求 8所述的装置， 其特征在于，
所述接收模块， 还用于用户设备接收服务小区基站发送的所述协作小 区的标 ΐ只。
10、 根据权利要求 9所述的装置， 其特征在于， 所述消除模块包括： 第一计算单元， 用于根据所述协作小区的标识， 计算用于估计所述协 作小区与所述用户设备间的信道状态信息的导频序列；
测量单元， 用于根据所述导频序列， 测量所述协作小区与所述用户设 备间的信道状态信息。
11、根据权利要求 10所述的装置， 其特征在于， 所述消除模块还包括： 第二计算单元， 用于根据所述协作小区的标识， 计算所述协作小区的 小区特定导频偏移量；
第一确定单元， 用于根据所述小区特定导频偏移量， 确定所述业务数 据中， 受所述协作小区的小区特定导频干扰的业务数据所在的对应子帧； 第二确定单元， 用于根据所述对应子帧的本地序列， 确定所述小区特 定导频序列。
12、 根据权利要求 11所述的装置， 其特征在于， 所述消除模块， 用于 根据计算公式： Υ:!^1^ ^!^^、 或者 Y:!^1^ ^!^1^^ ^!^!^ , 消除所述业务数据中所述协作小区的小区特定导频；
其中， 所述 Y为所述用户设备接收的业务数据； 所述 Hu为所述用户 设备与所述服务小区间的信道状态信息；所述 为所述服务小区针对所述 用户设备的预编码矩阵； 所述 Si为所述服务小区向所述用户设备发送的原 始业务数据； 所述 Hpi为第 i个存在小区特定导频干扰的协作小区与所述用 户设备间的信道状态信息； 所述 Pi为第 i个在小区特定导频干扰的协作小 区的小区特定导频序列； 所述 是第 i个存在物理下行共享信道干扰的协 作小区和用户设备间的信道状态信息； Wi是第 i个存在物理下行共享信道 干扰的协作小区采用的预编码矩阵； Si为第 i个存在物理下行共享信道干扰 的协作小区的物理下行共享信道所传输的业务数据。
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1906862A (zh) * 2003-11-25 2007-01-31 艾利森电话股份有限公司 选择性干扰消除
CN101013916A (zh) * 2007-02-05 2007-08-08 华南理工大学 一种采用智能天线实现接收分集的方法及装置
TW201012088A (en) * 2008-08-01 2010-03-16 Qualcomm Inc Successive detection and cancellation for cell pilot detection

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8923216B2 (en) * 2009-07-30 2014-12-30 Qualcomm Incorporated Robust decoding of CoMP transmissions

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1906862A (zh) * 2003-11-25 2007-01-31 艾利森电话股份有限公司 选择性干扰消除
CN101013916A (zh) * 2007-02-05 2007-08-08 华南理工大学 一种采用智能天线实现接收分集的方法及装置
TW201012088A (en) * 2008-08-01 2010-03-16 Qualcomm Inc Successive detection and cancellation for cell pilot detection

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