WO2011006438A1 - 一种同频组网移动通信系统中的抗干扰方法和装置 - Google Patents

一种同频组网移动通信系统中的抗干扰方法和装置 Download PDF

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Publication number
WO2011006438A1
WO2011006438A1 PCT/CN2010/075174 CN2010075174W WO2011006438A1 WO 2011006438 A1 WO2011006438 A1 WO 2011006438A1 CN 2010075174 W CN2010075174 W CN 2010075174W WO 2011006438 A1 WO2011006438 A1 WO 2011006438A1
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Prior art keywords
cell
cell list
list
probability
candidate
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PCT/CN2010/075174
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English (en)
French (fr)
Inventor
桑东升
蔡月民
徐红艳
康绍莉
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大唐移动通信设备有限公司
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Application filed by 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Priority to EP10799436.0A priority Critical patent/EP2456101B1/en
Priority to US13/384,150 priority patent/US8812038B2/en
Publication of WO2011006438A1 publication Critical patent/WO2011006438A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/005—Interference mitigation or co-ordination of intercell interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control

Definitions

  • the present invention relates to the field of anti-jamming technology in a mobile communication system, and in particular, to an anti-interference method and apparatus in a co-frequency mobile communication system. Background of the invention
  • the user signal of the same-frequency neighboring cell may interfere with the user signal of the cell, and the communication quality is lowered.
  • FIG. 1 is a flowchart of a method for reducing interference of users in an intra-frequency neighboring cell in the prior art. As shown in FIG. 1, the method includes:
  • Step 101 Configure an intra-frequency neighbor cell interference list in the network side device of the local cell.
  • the intra-frequency neighbor cell interference list can be obtained by using various configuration methods. For example, in the network planning phase, according to parameters such as the maximum number of users that each neighboring cell can support, select a neighboring cell in the same-frequency neighboring cell that may cause greater interference to the local cell, and configure the selected neighboring cell into the same-frequency neighboring cell. Or the interference list; or, the network controller (RNC) detects the user distribution of each cell in the RNC, analyzes the interference situation of each cell to the neighboring cell according to the distribution, and generates a large interference to the local cell in the same-frequency neighboring cell.
  • the neighboring cell is configured to enter the intra-frequency neighbor cell interference list in the network side device of the local cell; or, as far as possible, all the neighboring cells of the current cell are configured into the same-frequency neighboring cell.
  • Step 1 After the static intra-frequency neighbor cell interference list is configured in step 1, the cells in the list are jointly detected in steps 102 and 103, thereby reducing the interference of the intra-frequency neighboring cell to the local cell.
  • Step 102 In the process of mobile communication, obtain interference information of each neighboring cell in the interference cell list by using channel estimation.
  • the interference code channel information of the interfering cell that is, the interference information of the interfering cell is obtained.
  • Step 103 Remove interference of each neighboring cell to the local cell according to the interference information.
  • the neighboring cell interference list in the existing method is a pre-configured static list, and the actual interference situation of each neighboring cell to the local cell is dynamically changed. In some moments, the static list may not be included. The neighboring cell that currently has a large interference to the local cell.
  • the neighboring cell in the static list is only subjected to the anti-interference processing, if the neighboring cell that has a large interference to the current cell is not configured in the static list, the anti-interference performance of the cell is reduced, and the communication quality is affected.
  • an object of the embodiments of the present invention is to provide an anti-interference method and apparatus in a mobile communication system of the same frequency group, which improves the performance of each cell in the mobile communication system against interference of the same frequency neighboring cell, and improves the communication quality. Reduce the complexity of the network side device that performs anti-interference performance processing.
  • An anti-interference method in a same-frequency network mobile communication system includes: generating a probability of interference to a local cell according to each neighboring cell of the local cell Forming a list of candidate cells;
  • Selecting a list of selected cells from the list of candidate cells according to the probability Performing channel estimation on the neighboring cell in the selected cell list, and obtaining the current signal power of each neighboring cell in the selected cell list according to the channel estimation result, and selecting the detected cell list from the selected cell list according to the signal power;
  • An anti-interference device in a mobile communication system of the same frequency group comprising a candidate cell list maintenance module, a selected cell list maintenance module, a detection cell list maintenance module and an anti-interference module;
  • the candidate cell list maintenance module stores a list of candidate cells formed according to a probability that each neighboring cell of the cell generates interference to the cell, and the probability of each cell in the candidate cell list;
  • the selected cell list maintenance module selects, according to the probability of each cell in the candidate cell list, the selected cell list from the candidate cell list and stores the selected cell list;
  • the detecting cell list maintenance module performs channel estimation on the neighboring cells in the selected cell list, and obtains current signal power of each neighboring cell in the selected cell list according to the channel estimation result, and selects from the selected cell list according to the signal power.
  • the d and the area list are detected and stored; the anti-interference module performs joint detection on the neighboring cells in the detected cell list to remove the interference of the neighboring cell to the local cell.
  • the present invention firstly forms a candidate cell list according to the probability that each neighboring cell of the current cell generates interference to the local cell, and then selects the selected cell list from the candidate cell list according to the probability, and selects the selected cell list.
  • the neighboring cell performs channel estimation, and according to the channel estimation result, the current signal power of each neighboring cell in the selected cell list is obtained, and the detected cell list is selected from the selected cell list according to the signal power, and the neighboring cell in the detected cell list is detected. Perform joint detection to remove interference of the neighboring cell to the local cell.
  • the detection cell list is based on the probability that each neighboring cell generates interference to the local cell.
  • the current signal power of the neighboring cell is dynamically formed, and can usually include a neighboring cell that has a large interference to the current cell. Therefore, the present invention can select an adjacent cell that has a large interference to the current cell to perform anti-interference processing, and improve the mobile communication system.
  • the performance of the inter-cell neighboring cell is improved, and the communication quality is improved.
  • the complexity of the network side device performing the anti-interference performance processing can be reduced.
  • FIG. 1 is a flow chart of a method for reducing interference of users in an intra-frequency neighboring cell in the prior art.
  • FIG. 2 is a flow chart of a method for reducing user interference of an intra-frequency neighboring cell provided by the present invention.
  • FIG. 3 is a structural diagram of an apparatus for reducing interference of users in an intra-frequency neighboring cell provided by the present invention. Mode for carrying out the invention
  • FIG. 2 is a flowchart of a method for reducing user interference of an intra-frequency neighboring cell provided by the present invention. As shown in FIG. 2, the method includes:
  • Step 201 Form a candidate cell list according to a probability that each neighboring cell of the local cell generates interference to the local cell.
  • the neighboring cell ID that needs to be written into the candidate cell list may be determined according to factors such as the number of users in the neighboring cell, the transmit power, the physical location relationship with the cell, and the antenna pattern. And the initial probability that each neighboring cell generates interference to the local cell, and then directly stores the candidate cell list and the probability in the network side device used for performing anti-interference processing, where the network side device is a base station.
  • the interference generated by the cell is strong. Therefore, if the user capacity and the transmission power of the two or more cells are the same, the physical location relationship of the cell may be relatively close, and the antenna pattern points to the cell.
  • the neighboring cells are ranked in front of the list of the candidate cells, so that the positional relationship of each neighboring cell in the list of candidate cells can also reflect the probability that each neighboring cell will interfere with the cell.
  • the initial cell list may be stored in the network side device, where all neighbor cell IDs of the current cell are stored in the initial cell list, and all the neighbor cells are stored in the network side device.
  • the initial probability that each neighboring cell generates interference to the local cell and then selects a candidate cell list from the initial cell list according to the probability that each neighboring cell in the initial cell list generates interference to the local cell.
  • the initial probability that the neighboring cells in the neighboring cells generate interference to the local cell is the same as the initial probability that each neighboring cell in the candidate cell list interferes with the local cell.
  • the probability of each neighboring cell in the initial cell list generating interference to the local cell may be periodically updated.
  • the probability update period ⁇ 3 of the cell in the initial cell list is preset, and at 7; when arriving, channel estimation is performed on the neighboring cell in the initial cell list, and the current neighboring cell in the initial cell list is obtained according to the channel estimation result.
  • Signal power updating the probability of the cell in the initial cell list according to the signal power.
  • the following method may also be used to update the cell probability in the initial cell list:
  • ⁇ 3 arrives, only the probability of removing the remaining cells obtained by the cells in the candidate cell list in the initial cell list is updated. Specifically, channel estimation is performed on the remaining cells, and current signal power of the remaining cells is obtained according to the channel estimation result, and the probability of the remaining cells is updated according to the signal power.
  • the candidate cell list may also be periodically updated.
  • the cell with a smaller probability value in the candidate cell list is updated to a cell with a larger probability value in the initial cell list, or from the initial cell list.
  • the cells are not randomly selected in the cells in the candidate cell list, and the randomly selected cells are updated to the candidate cell list.
  • the update period of ⁇ 3 and the list of candidate cells can be set longer, for example, set to one week.
  • Step 202 Select, according to the probability, a list of selected cells from the list of candidate cells.
  • Step 203 Select a detection cell list from the selected cell list.
  • channel estimation is performed on the neighboring cells in the selected cell list, and the current signal power of each neighboring cell in the selected cell list is obtained according to the channel estimation result, and the detected cell list is selected from the selected cell list according to the signal power.
  • Step 204 Perform joint detection on the neighboring cells in the detected cell list to remove interference of the neighboring cell to the local cell.
  • the probability of each neighboring cell in the cell list to be selected may be periodically updated, and the list of the selected cell may be periodically updated according to the latest probability value of each neighboring cell in the candidate cell list.
  • the probability update period 7 of the cell in the candidate cell list and the cell update period r 2 of the selected cell list where ⁇ 2 ⁇ ;
  • the probability of detecting the cell in the cell list is increased by a first probability update value, and the probability of the cell in the selected cell list and not in the detected cell list is reduced.
  • the second probability update value ⁇ 2 increases the probability of the cell in the candidate d, the zone list and not in the selected cell list by a third probability value ⁇ .
  • the selected cell list is re-selected from the candidate cell list according to the updated cell probability value in the candidate cell list.
  • the neighboring cells may be selected according to the updated probability values of the neighboring cells in the candidate cell list, and the neighboring cells in the selected cell list are all updated to the neighboring cells selected from the candidate cell list.
  • the neighboring cell is selected according to the updated probability values of the neighboring cells in the candidate cell list, and the neighboring cell in the selected cell list is updated to the neighboring cell selected from the candidate cell list, where The number of updated cells is not greater than a predetermined value.
  • the predetermined value may be set according to the requirement of the complexity of the network side device. Generally, if the complexity of the network side device is required to be low, the predetermined value is set to be small.
  • the selected cell list is re-selected from the candidate cell list according to the probability value of the cell update in the candidate cell list, if the probability value of the neighbor cell is updated when the ⁇ 3 arrives, If the probability value obtained by performing the probability update on the neighboring cell is different, the probability value obtained by performing the probability update on the neighboring cell at the time of arrival is re-selected from the list of the selected cell, that is, When the selected cell list is selected from the candidate cell list, the selected cell list is selected according to the probability value obtained by updating each neighboring cell in the cell list to be selected, and specifically, the candidate cell list and the initial cell list may be separately maintained.
  • the probability table selects the selected cell list according to the probability table of the candidate cell list.
  • the probability of updating is the same, according to the probability and the two or more neighbors.
  • the physical location relationship between the cell and the local cell and the antenna pattern of each of the two or more neighboring cells determine whether the two or more neighboring cells are selected into the selected cell list. For example, if only one neighboring cell of the two or more neighboring cells is selected into the selected cell list according to the limitation of the number of cell updates, the two or more neighboring cells are based on the physical with the own cell.
  • the location relationship and the neighboring cell whose antenna pattern is ranked in the front position of the candidate cell list are selected into the selected cell list.
  • FIG. 3 is a structural diagram of an apparatus for reducing user interference of an intra-frequency neighboring cell provided by the present invention.
  • the apparatus includes a candidate cell list maintenance module 301, an elected cell list maintenance module 302, a detected cell list maintenance module 303, and Anti-interference module 304.
  • the candidate cell list maintenance module 301 stores a list of candidate cells formed according to a probability that each neighboring cell of the cell generates interference to the cell, and the probability of each cell in the candidate cell list.
  • the selected cell list maintenance module 302 selects and stores the selected cell list from the list of candidate cells according to the probability of each cell in the candidate cell list.
  • the detection cell list maintenance module 303 performs channel estimation on the neighboring cells in the selected cell list, and obtains current signal power of each neighboring cell in the selected cell list according to the channel estimation result, and selects and detects from the selected cell list according to the signal power. d, the list of areas and stored.
  • the anti-interference module 304 performs joint detection on the neighboring cells in the detected cell list to remove the interference of the neighboring cell to the local cell.
  • the apparatus can also further include a probability update module.
  • the probability update module when the probability update period is set in advance; when the arrival, the probability of detecting the cell in the cell list is increased by the first probability update value, and the probability of the cell in the selected cell list and not in the detected cell list is reduced.
  • the second probability update value ⁇ 2 increases the probability of the cell in the candidate cell list and not in the selected cell list by a third probability value ⁇ .
  • the selected cell list maintenance module 302 may further include, when the cell update period ⁇ 2 arrives, reselecting the selected cell list from the candidate cell list according to the updated cell probability value in the candidate cell list. Module, where ⁇ 2 ⁇ ⁇ .
  • the selected cell list maintenance module 302 reselects the incoming cell list from the candidate cell list.
  • the list of selected cells is:
  • the apparatus can also further include an initial cell list maintenance module.
  • the initial cell list maintenance module stores an initial cell list including all neighbor cell IDs of the cell, and stores a probability that each neighbor cell in the neighbor cells generates interference to the cell.
  • the candidate cell list maintenance module 301 may further include a module for selecting a candidate cell list from the initial cell list according to the probability.
  • the candidate cell list maintenance module 301 may further include, when the probability update period ⁇ 3 of the cell arrives in the initial cell list, perform channel estimation on the remaining cell obtained by removing the cell in the candidate cell list in the initial cell list, And obtaining, according to the channel estimation result, a current signal power of the remaining cell, and updating, by the signal power, a module for updating the probability of the remaining cell.
  • the candidate cell list maintenance module 301 may further be configured to: when updating the candidate cell list, select a cell from each cell in the initial cell list that is not currently in the candidate cell list, and update the selected cell to be selected.
  • the candidate cell list maintenance module 301 may be configured to randomly select a cell to join the to-be-selected cell list from each cell in the initial cell list that is not currently in the candidate cell list, or may select a cell to join the candidate cell list according to a predetermined principle. For example, the cell is selected to join the candidate cell list according to the geographical location of the cell, the antenna pattern, and/or the probability of generating interference to the cell.
  • the selected cell list maintenance module 302 may further include: when the probability of two or more neighboring cells in the candidate cell list is the same, according to the probability, and the physical location relationship between the two or more neighboring cells and the local cell, and The antenna side of each of the two or more neighboring cells It is determined whether the two or more neighboring cells are selected into the modules in the selected cell list.

Description

一种同频组网移动通信系统中的抗干扰方法和装置
技术领域
本发明涉及移动通信系统中的抗干扰技术领域， 尤其涉及一种同频 组网移动通信系统中的抗干扰方法和装置。 发明背景
在同频组网的移动通信系统中， 同频邻小区的用户信号会对本小区 用户信号产生干扰， 降低通信质量。
目前， 通过配置静态的同频邻小区干扰列表， 对该列表中的小区进 行联合检测来降低所述干扰， 提高通信质量， 具体参见图 1。
图 1是现有技术中降低同频邻小区用户干扰的方法流程图， 如图 1 所示， 该方法包括：
步骤 101 , 在本小区的网络侧设备中配置同频邻小区干扰列表。 所述同频邻小区干扰列表可以通过多种配置方法得到。 例如， 在网 络规划阶段， 根据各个邻小区所能够支持的最大用户数等参数， 选取同 频邻小区中可能对本小区产生较大干扰的邻小区， 将所选取的邻小区配 置进同频邻小区干扰列表； 或者， 由网络控制器（RNC )检测该 RNC 下各个小区的用户分布情况， 根据所述分布情况分析各个小区对邻小区 的干扰情况， 将同频邻小区中对本小区产生较大干扰的邻小区配置进本 小区网络侧设备中的同频邻小区干扰列表； 或者， 尽可能将本小区的所 有邻小区都配置进所述同频邻小区干 4尤列表。
通过步骤 1配置好静态的同频邻小区干扰列表后， 通过步骤 102和 103对该列表中的小区进行联合检测， 从而降低同频邻小区对本小区的 干扰。 步骤 102, 在移动通信过程中， 通过信道估计得到所述干扰小区列 表中各个邻小区的干扰信息。
本步骤中，根据配置的干扰小区列表中的小区信息和信道估计信息， 得到干扰小区的干扰码道信息， 即干扰小区的干扰信息。
步骤 103 , 根据所述干扰信息去除各个邻小区对本小区的干扰。 由上述方案可见， 现有方法中的邻小区干扰列表是预先配置好的静 态列表， 而各个相邻小区对本小区的实际干扰情况是动态变化的， 在某 些时刻， 该静态列表中可能不包括当前对本小区干扰较大的邻小区。
由于只对静态列表中的邻小区进行抗干扰处理， 因此如果当前对本 小区干扰较大的邻小区没有被配置在所述静态列表中， 将会降低本小区 的抗干扰性能， 影响通信质量。
由于每去除一个邻小区对本小区的干扰时， 都要进行信道估计等处 理， 因此， 如果静态列表配置过大又会造成进行抗干扰处理的网络侧设 备过于复杂， 增加设备成本。 发明内容
有鉴于此， 本发明实施例的目的在于提供一种同频组网移动通信系 统中的抗干扰方法和装置， 提高移动通信系统中各个小区对抗同频邻小 区干扰的性能， 提高通信质量， 同时降低进行抗干扰性能处理的网络侧 设备的复杂度。
为达到上述目的， 本发明实施例的技术方案具体是这样实现的： 一种同频组网移动通信系统中的抗干扰方法， 该方法包括： 根据本小区的各个邻小区对本小区产生干扰的概率形成待选小区列 表；
根据所述概率从待选小区列表中选出入选小区列表； 对入选小区列表中的邻小区进行信道估计， 根据信道估计结果得出 入选小区列表中各个邻小区当前的信号功率， 根据所述信号功率从入选 小区列表中选出检测小区列表；
对检测小区列表中的邻小区进行联合检测以去除所述邻小区对本小 区的干 4尤。
一种同频组网移动通信系统中的抗干扰装置， 该装置包括待选小区 列表维护模块、 入选小区列表维护模块、 检测小区列表维护模块和抗干 扰模块；
所述待选小区列表维护模块， 存储根据本小区的各个邻小区对本小 区产生干扰的概率形成的待选小区列表， 以及待选小区列表中各个小区 的所述概率；
所述入选小区列表维护模块， 根据待选小区列表中各个小区的所述 概率， 从待选小区列表中选出入选小区列表并存储；
所述检测小区列表维护模块， 对入选小区列表中的邻小区进行信道 估计， 根据信道估计结果得出入选小区列表中各个邻小区当前的信号功 率， 根据所述信号功率从入选小区列表中选出检测 d、区列表并存储； 所述抗干扰模块， 对检测小区列表中的邻小区进行联合检测以去除 所述邻小区对本小区的干扰。
由上述技术方案可见， 本发明首先根据本小区的各个邻小区对本小 区产生干扰的概率形成待选小区列表， 然后再根据所述概率从待选小区 列表中选出入选小区列表， 对入选小区列表中的邻小区进行信道估计， 根据信道估计结果得出入选小区列表中各个邻小区当前的信号功率， 根 据所述信号功率从入选小区列表中选出检测小区列表， 对检测小区列表 中的邻小区进行联合检测以去除所述邻小区对本小区的干扰。
其中的检测小区列表是根据各个邻小区对本小区产生干扰的概率以 及邻小区当前的信号功率动态形成的， 通常能够包括当前对本小区干扰 较大的邻小区， 因此， 采用本发明能够选择出当前对本小区干扰较大的 邻小区进行抗干扰处理， 提高移动通信系统中各个小区对抗同频邻小区 干扰的性能， 提高通信质量， 另一方面， 由于检测小区列表中的邻小区 个数较少， 因此能够降低进行抗干扰性能处理的网络侧设备的复杂度。 附图简要说明
图 1是现有技术中降低同频邻小区用户干扰的方法流程图。
图 2是本发明提供的降低同频邻小区用户干扰的方法流程图。
图 3是本发明提供的降低同频邻小区用户干扰的装置结构图。 实施本发明的方式
为使本发明的目的、 技术方案及优点更加清楚明白， 以下参照附图 并举实施例， 对本发明进一步详细说明。
图 2是本发明提供的降低同频邻小区用户干扰的方法流程图， 如图 2所示， 该方法包括：
步骤 201 , 根据本小区的各个邻小区对本小区产生干扰的概率形成 待选小区列表。
本步骤中， 可以在网络规划阶段， 根据各个邻小区的用户数容量、 发射功率、 与本小区的物理位置关系、 天线方向图等因素， 确定出需要 写入待选小区列表的邻小区 ID,以及各个邻小区对本小区产生干扰的初 始概率， 然后直接将待选小区列表和所述概率存储在用于进行抗干扰处 理的网络侧设备中， 通常该网络侧设备是基站。
其中， 通常邻小区与本小区的物理位置关系越近， 该邻小区对本小 区产生的干 4尤越强， 邻小区的天线方向图指向本小区所在位置时， 对本 小区产生的干扰较强， 因此， 在两个以上的小区的用户数容量和发射功 率等其他因素相同的情况下， 可以将距离本小区的物理位置关系相对较 近， 且天线方向图指向本小区的邻小区排在待选小区列表靠前的位置 上， 这使得各个邻小区在待选小区列表中的位置关系也能体现出各个邻 小区对本小区产生干扰的概率。
另外， 本步骤中， 也可以预先在所述网络侧设备中存储初始小区列 表， 该初始小区列表中存储有本小区的所有邻小区 ID, 并在所述网络侧 设备中存储所述所有邻小区中各个邻小区对本小区产生干扰的初始概 率， 然后根据初始小区列表中各个邻小区对本小区产生干扰的概率， 从 初始小区列表中选出待选小区列表。
其中， 所述所有邻小区中各个邻小区对本小区产生干扰的初始概率 与上述待选小区列表中各个邻小区对本小区产生干扰的初始概率的确 定方法相同。
可以对初始小区列表中各个邻小区对本小区产生干扰的概率进行周 期性更新。
具体地， 预先设置初始小区列表中小区的概率更新周期 Γ3 , 在 7；到 达时， 对初始小区列表中的邻小区进行信道估计， 根据信道估计结果得 出初始小区列表中各个邻小区当前的信号功率， 根据所述信号功率对初 始小区列表中小区的所述概率进行更新。
为了加快概率更新速度， 还可以采用如下方法对初始小区列表中小 区概率的更新： 在 Γ3到达时， 仅对初始小区列表中除去待选小区列表中 小区所得到的剩余小区的概率进行更新。 具体地， 对所述剩余小区进行 信道估计， 根据信道估计结果得出所述剩余小区当前的信号功率， 根据 所述信号功率对所述剩余小区的所述概率进行更新。 相应地， 待选小区列表也可以进行周期性更新， 在更新时， 将待选 小区列表中概率值较小的小区更新为初始小区列表中概率值较大的小 区， 或者， 从初始小区列表中当前不在待选小区列表中的各个小区中随 机选择小区， 将随机选择出的小区更新到待选小区列表中。
其中， Γ3以及待选小区列表的更新周期均可以设的较长， 例如设置 为一周。
步骤 202, 根据所述概率从待选小区列表中选出入选小区列表。 步骤 203 , 从入选小区列表中选出检测小区列表。
本步骤中， 对入选小区列表中的邻小区进行信道估计， 根据信道估 计结果得出入选小区列表中各个邻小区当前的信号功率， 根据所述信号 功率从入选小区列表中选出检测小区列表。
步骤 204, 对检测小区列表中的邻小区进行联合检测以去除所述邻 小区对本小区的干扰。
在步骤 202和 203中， 可以对待选小区列表中各个邻小区的所述概 率进行周期性更新， 并且也可以根据待选小区列表中各个邻小区最新的 概率值对入选小区列表进行周期性更新。
具体地， 预先设置待选小区列表中小区的概率更新周期 7\和入选小 区列表的小区更新周期 r2 , 其中 Γ2≥ ;。
当 ；到达时， 对于待选小区列表中的各个邻小区， 将在检测小区列 表中的小区的概率增加第一概率更新值 , 将在入选小区列表中并且不 在检测小区列表中的小区的概率减 d、第二概率更新值 Ρ2 ,将在待选 d、区 列表中并且不在入选小区列表中的小区的概率增加第三概率值 Δ。
当 2到达时， 根据待选小区列表中的小区更新后的概率值， 从所述 待选小区列表中重新选出入选小区列表。 例如， 可以按照待选小区列表中各邻小区更新后的概率值由大到小 的顺序选择邻小区， 将入选小区列表中的邻小区全部更新为从待选小区 列表中选出的邻小区。 或者， 按照待选小区列表中各邻小区更新后的概 率值由大到小的顺序选择邻小区， 将入选小区列表中的邻小区部分更新 为从待选小区列表中选出的邻小区， 其中， 更新的小区数不大于预定数 值。 所述预定数值可以依据对网络侧设备复杂度的要求而设定， 一般， 如果要求网络侧设备复杂度较低， 则将所述预定数值设置的较小。
其中， 在根据待选小区列表中的小区更新后的概率值， 从所述待选 小区列表中重新选出入选小区列表时， 如果在 Γ3到达时对邻小区进行概 率更新得到的概率值与在 ；到达时对该邻小区进行概率更新得到的概 率值不同， 则根据在 ；到达时对该邻小区进行概率更新得到的概率值从 待选小区列表中重新选出入选小区列表， 也就是说， 从待选小区列表中 选择入选小区列表时， 根据对待选小区列表中各个邻小区进行更新得到 的概率值来选择入选小区列表， 具体地， 可以为待选小区列表和初始小 区列表分别维护相应的概率表， 根据待选小区列表的概率表来选择入选 小区列表。
在根据所述概率从待选小区列表中选出入选小区列表时， 如果待选 小区列表中有两个以上的邻小区更新后的概率相同， 则根据所述概率以 及所述两个以上的邻小区与本小区的物理位置关系以及所述两个以上 邻小区各自的天线方向图判断是否将所述两个以上的邻小区选入入选 小区列表中。 例如， 如果根据小区更新数目的限制， 所述两个以上的邻 小区中只能有一个邻小区被选入入选小区列表中， 则将所述两个以上的 邻小区中根据与本小区的物理位置关系以及天线方向图排在待选小区 列表靠前位置上的邻小区选入入选小区列表中。 下面依据上述方法实施例， 给出本发明提供的降低同频邻小区用户 干扰的装置实施例。
图 3是本发明提供的降低同频邻小区用户干扰的装置结构图， 如图 3 所示， 该装置包括待选小区列表维护模块 301、 入选小区列表维护模 块 302、 检测小区列表维护模块 303和抗干扰模块 304。
待选小区列表维护模块 301 , 存储根据本小区的各个邻小区对本小 区产生干扰的概率形成的待选小区列表， 以及待选小区列表中各个小区 的所述概率。
入选小区列表维护模块 302, 根据待选小区列表中各个小区的所述 概率， 从待选小区列表中选出入选小区列表并存储。
检测小区列表维护模块 303 , 对入选小区列表中的邻小区进行信道 估计， 根据信道估计结果得出入选小区列表中各个邻小区当前的信号功 率， 根据所述信号功率从入选小区列表中选出检测 d、区列表并存储。
抗干扰模块 304, 对检测小区列表中的邻小区进行联合检测以去除 所述邻小区对本小区的干扰。
该装置还可以进一步包括概率更新模块。
所述概率更新模块， 当预先设置的概率更新周期 ；到达时， 将检测 小区列表中小区的概率增加第一概率更新值 , 将在入选小区列表中并 且不在检测小区列表中的小区的概率减小第二概率更新值 Ρ2 , 将在待选 小区列表中并且不在入选小区列表中的小区的概率增加第三概率值厶。
入选小区列表维护模块 302, 还可以进一步包括用于在小区更新周 期 Γ2到达时， 根据待选小区列表中的小区更新后的概率值， 从所述待选 小区列表中重新选出入选小区列表的模块， 其中， Τ2≥Ί 。
所述入选小区列表维护模块 302从所述待选小区列表中重新选出入 选小区列表为：
按照待选小区列表中各邻小区更新后的概率值由大到小的顺序选择 邻小区， 将入选小区列表中的邻小区全部或部分更新为从待选 '』、区列表 中选出的邻小区。
该装置还可以进一步包括初始小区列表维护模块。
所述初始小区列表维护模块，存储包含本小区的所有邻小区标识 ID 的初始小区列表， 并存储所述所有邻小区中各个邻小区对本小区产生干 扰的概率。
待选小区列表维护模块 301 , 还可以进一步包括用于根据所述概率 从初始小区列表中选出待选小区列表的模块。
待选小区列表维护模块 301 , 还可以进一步包括用于在初始小区列 表中小区的概率更新周期 Γ3到达时， 对初始小区列表中除去待选小区列 表中小区所得到的剩余小区进行信道估计， 根据信道估计结果得出所述 剩余小区当前的信号功率， 根据所述信号功率对所述剩余小区的所述概 率进行更新的模块。
待选小区列表维护模块 301 , 还可以进一步包括用于在更新待选小 区列表时， 从初始小区列表中当前不在待选小区列表中的各个小区中选 择小区， 将选择出的小区更新到待选小区列表中的模块。 待选小区列表 维护模块 301可以是从初始小区列表中当前不在待选小区列表中的各个 小区中随机选择小区加入到待选小区列表， 也可以是根据预定原则选择 小区加入到待选小区列表， 例如根据小区的地理位置、 天线方向图和 / 或对本小区产生干扰的概率等选择小区加入到待选小区列表。
入选小区列表维护模块 302, 还可以进一步包括在待选小区列表中 有两个以上的邻小区概率相同时， 根据所述概率以及所述两个以上的邻 小区与本小区的物理位置关系以及所述两个以上邻小区各自的天线方 向图判断是否将所述两个以上的邻小区选入入选小区列表中的模块。 以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的 保护范围， 凡在本发明的精神和原则之内所做的任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种同频组网移动通信系统中的抗干扰方法， 其特征在于， 该 方法包括：
根据本小区的各个邻小区对本小区产生干扰的概率形成待选小区 列表；
根据所述概率从待选小区列表中选出入选小区列表；
对入选小区列表中的邻小区进行信道估计， 根据信道估计结果得出 入选小区列表中各个邻小区当前的信号功率， 根据所述信号功率从入选 小区列表中选出检测小区列表；
对检测小区列表中的邻小区进行联合检测以去除所述邻小区对本 小区的干扰。
2、 如权利要求 1所述的方法， 其特征在于， 该方法进一步包括： 预先设置待选小区列表中小区的概率更新周期 ；和入选小区列表 的小区更新周期 r2 , 其中 Γ2≥ ; ;
当 ；到达时， 将检测小区列表中小区的概率增加第一概率更新值 Ρχ , 将在入选小区列表中并且不在检测小区列表中的小区的概率减小第 二概率更新值 Ρ2 , 将在待选小区列表中并且不在入选小区列表中的小区 的概率增加第三概率值 Δ；
当 2到达时， 根据待选小区列表中的小区更新后的概率值， 从所述 待选小区列表中重新选出入选小区列表。
3、 如权利要求 2所述的方法， 其特征在于， 从所述待选小区列表 中重新选出入选小区列表包括：
按照待选小区列表中各邻小区更新后的概率值由大到小的顺序选 择邻小区， 将入选小区列表中的邻小区全部更新为从待选小区列表中选 出的邻小区。
4、 如权利要求 2所述的方法， 其特征在于， 从所述待选小区列表 中重新选出入选小区列表包括：
按照待选小区列表中各邻小区更新后的概率值由大到小的顺序选 择邻小区， 将入选小区列表中的邻小区部分更新为从待选小区列表中选 出的邻小区， 其中， 更新的小区数不大于预定数值。
5、 如权利要求 1至 4任一权项所述的方法， 其特征在于， 所述根 据本小区的各个邻小区对本小区产生干扰的概率形成待选小区列表包 括：
将本小区的所有邻小区标识 ID存储在初始小区列表中， 并存储所 述所有邻小区中各个邻小区对本小区产生干扰的概率， 根据所述概率从 初始小区列表中选出待选小区列表。
6、 如权利要求 5所述的方法， 其特征在于， 该方法进一步包括： 预先设置初始小区列表中小区的概率更新周期 Γ3 , 在 Γ3到达时， 对 初始小区列表中除去待选小区列表中小区所得到的剩余小区的所述概 率进行更新。
7、 如权利要求 6所述的方法， 其特征在于， 所述对所述剩余小区 的所述概率进行更新包括：
对所述剩余小区进行信道估计， 根据信道估计结果得出所述剩余小 区当前的信号功率， 根据所述信号功率对所述剩余小区的所述概率进行 更新。
8、 如权利要求 5 所述的方法， 其特征在于， 根据所述概率从初始 小区列表中选出待选小区列表之后， 该方法进一步包括：
在更新待选小区列表时， 从初始小区列表中当前不在待选小区列表 中的各个小区中选择小区， 将选择出的小区更新到待选小区列表中。
9、 如权利要求 1 所述的方法， 其特征在于， 根据所述概率从待选 小区列表中选出入选小区列表包括：
如果待选小区列表中有两个以上的邻小区概率相同， 则根据所述概 率、 所述两个以上的邻小区与本小区的物理位置关系以及所述两个以上 邻小区各自的天线方向图判断是否将所述两个以上的邻小区选入入选 小区列表中。
10、 一种同频组网移动通信系统中的抗干扰装置， 其特征在于， 该 装置包括待选小区列表维护模块、 入选小区列表维护模块、 检测小区列 表维护模块和抗干扰模块；
所述待选小区列表维护模块， 存储根据本小区的各个邻小区对本小 区产生干扰的概率形成的待选小区列表， 以及待选小区列表中各个小区 的所述概率；
所述入选小区列表维护模块， 根据待选小区列表中各个小区的所述 概率， 从待选小区列表中选出入选小区列表并存储；
所述检测小区列表维护模块， 对入选小区列表中的邻小区进行信道 估计， 根据信道估计结果得出入选小区列表中各个邻小区当前的信号功 率， 根据所述信号功率从入选小区列表中选出检测 d、区列表并存储； 所述抗干扰模块， 对检测小区列表中的邻小区进行联合检测以去除 所述邻小区对本小区的干扰。
11、 如权利要求 10 所述的装置， 其特征在于， 该装置进一步包括 概率更新模块；
所述概率更新模块， 在预先设置的概率更新周期 ；到达时， 将检测 小区列表中小区的概率增加第一概率更新值 , 将在入选小区列表中并 且不在检测小区列表中的小区的概率减小第二概率更新值 Ρ2 , 将在待选 小区列表中并且不在入选小区列表中的小区的概率增加第三概率值 Δ； 所述入选小区列表维护模块， 进一步包括用于在小区更新周期 2到 达时， 根据待选小区列表中的小区更新后的概率值， 从所述待选小区列 表中重新选出入选小区列表的模块；
其中， Τ2≥Ί[。
12、 如权利要求 11所述的装置， 其特征在于，
所述入选小区列表维护模块， 按照待选小区列表中各邻小区更新后 的概率值由大到小的顺序选择邻小区， 将入选小区列表中的邻小区全部 或部分更新为从待选小区列表中选出的邻小区。
13、 如权利要求 10所述的装置， 其特征在于， 该装置进一步包括 初始小区列表维护模块；
所述初始小区列表维护模块，存储包含本小区的所有邻小区标识 ID 的初始小区列表， 并存储所述所有邻小区中各个邻小区对本小区产生干 扰的概率；
所述待选小区列表维护模块， 进一步包括用于根据所述概率从初始 小区列表中选出待选小区列表的模块。
14、 如权利要求 13所述的装置， 其特征在于，
所述待选小区列表维护模块， 进一步包括用于在初始小区列表中小 区的概率更新周期 Γ3到达时， 对初始小区列表中除去待选小区列表中小 区所得到的剩余小区进行信道估计， 根据信道估计结果得出所述剩余小 区当前的信号功率， 根据所述信号功率对所述剩余小区的所述概率进行 更新的模块。
15、 如权利要求 13所述的装置， 其特征在于， 所述待选小区列表维护模块， 进一步包括用于在更新待选小区列表 时， 从初始小区列表中当前不在待选小区列表中的各个小区中选择小 区， 将选择出的小区更新到待选小区列表中的模块。
16、 如权利要求 10所述的装置， 其特征在于，
所述入选小区列表维护模块， 进一步包括在待选小区列表中有两个 以上的邻小区概率相同时， 根据所述概率、 所述两个以上的邻小区与本 小区的物理位置关系以及所述两个以上邻小区各自的天线方向图判断 是否将所述两个以上的邻小区选入入选小区列表中的模块。
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