WO2012151991A1 - 一种盲切换或盲重定向的方法及系统 - Google Patents

一种盲切换或盲重定向的方法及系统 Download PDF

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Publication number
WO2012151991A1
WO2012151991A1 PCT/CN2011/083963 CN2011083963W WO2012151991A1 WO 2012151991 A1 WO2012151991 A1 WO 2012151991A1 CN 2011083963 W CN2011083963 W CN 2011083963W WO 2012151991 A1 WO2012151991 A1 WO 2012151991A1
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Prior art keywords
blind
redirection
terminal
target cell
handover
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PCT/CN2011/083963
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English (en)
French (fr)
Inventor
文永明
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US14/342,631 priority Critical patent/US9326210B2/en
Priority to EP11864941.7A priority patent/EP2750444B1/en
Publication of WO2012151991A1 publication Critical patent/WO2012151991A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837Determination of triggering parameters for hand-off
    • H04W36/008375Determination of triggering parameters for hand-off based on historical data

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method and system for blind handover or blind redirection. Background technique
  • a cellular network topology is usually adopted.
  • the terminal when performing handover or redirection, the terminal first needs to report the signal quality of the neighboring cell to the base station, and then the base station selects an appropriate target cell according to the report result of the terminal, the network load, and the like, and causes the terminal to switch or Redirect. This allows the switch or redirection to select the optimal d, zone, and guarantee the success rate of the handover or redirection.
  • the terminal and the base station establish a wireless link, that is, the receiver and transmitter of the terminal are working.
  • the terminal generally has only one set of receivers and transmitters, so that it is difficult for the terminal to measure the signal quality of other neighboring cells. It is difficult for a terminal to measure other cells with a working receiver. Especially for neighboring cells with different frequencies and different systems, it is difficult for the terminal to change the operating frequency, system and other neighboring cells while transmitting and receiving data.
  • Some standards allow the terminal to measure other cells while transmitting and receiving data, and negotiate with the terminal in advance.
  • the terminal does not send and receive data for a certain period of time, but measures other cells.
  • the LTE standard specifies a mechanism for measuring gaps: for example, an 8 ms measurement gap is allocated to the terminal every 40 ms. The terminal and the base station do not send and receive data in the measurement gap, and let the terminal measure the neighboring area. But this is At the expense of data transfer performance. As with the LTE standard described above, up to 20% of data throughput can be reduced.
  • the terminal If the terminal is required to measure the neighboring cell signal for a certain period of time and report it to the base station, and then the base station selects the target cell according to the measurement result, it also takes time; especially in the case where the terminal needs to perform switching or redirection immediately, such as high-speed motion, it is also possible to switch Or the redirection is not timely and affects the user's experience.
  • blind switching or blind redirection means that the base station does not require the terminal to measure the neighboring cell and report it, but directly commands the terminal to switch to or redirect to a target cell. However, after all, there is no measurement result as a basis for selection.
  • the blind switching or blind redirection of the base station may select a target cell that is not suitable, thereby causing failure and affecting the user experience. If you repeatedly have unsuccessful blind or blind redirection, you will also consume network resources. Summary of the invention
  • the main object of the present invention is to provide a method for blind handover or blind redirection, which can increase the probability that a base station blindly or blindly redirects a terminal to a suitable target cell.
  • a method for blind handover or blind redirection comprising:
  • the target cell in which the terminal performs blind handover or blind redirection is selected.
  • the method further includes:
  • the historical record of the switching or redirection of the terminal is: determining whether the history record of the terminal exists, and if yes, determining whether the target cell that is successfully switched or redirected has been recorded;
  • the method further includes:
  • the target cell When there is no history, the target cell is selected according to the traditional blind handover or blind redirection.
  • the target cell that selects the terminal to perform blind handover or blind redirection according to the historical record is:
  • the target cell that performs blind handover or blind redirection is selected according to the success times and time factors of each target cell in the history record.
  • a system for blind handover or blind redirection includes: a base station, a database, where the base station is configured to: if the terminal needs to perform blind handover or blind redirection, whether the terminal exists in the database The history of switching or redirection; when there is a history, according to the history, the target cell in which the terminal performs blind handover or blind redirection is selected.
  • the base station is further configured to update a history of handover or redirection of the terminal after the terminal successfully switches or redirects to the target cell.
  • the base station is specifically configured to determine whether a history record of the terminal exists, and if yes, further determine whether a target cell that is successfully switched or redirected has been recorded; when the target cell has been recorded, Adding the number of successes of the target cell by one, and recording the time of the current handover or redirection; when the history record of the terminal does not exist or the target cell is not recorded, the target cell of the terminal is added. Record, the success of the target cell The number of times is set to 1, and the time of this switch or redirect is recorded.
  • the base station is further configured to select a target cell according to a conventional blind switching or blind redirection when there is no history.
  • the base station is specifically configured to select, according to the success times and time factors of each cell in the history record, the target cell that performs blind handover or blind redirection.
  • the base station When the terminal needs to perform blind handover or blind redirection, the base station performs the selection of the target cell by performing a history of handover or redirection before the stored terminal, thereby improving the accuracy of the target cell selection, thereby improving blind handover or
  • the success rate of blind redirection reduces the process of repeated blind or blind redirection, saves network resources, reduces the probability of dropped events, and improves the user experience.
  • FIG. 1 is a schematic flowchart of an implementation process of a method for blind handover or blind redirection according to the present invention
  • FIG. 2 is a schematic flowchart of an implementation of a first embodiment of a method for blind handover or blind redirection according to the present invention
  • FIG. 3 is a schematic flowchart of a second embodiment of a blind handover or blind redirection method according to the present invention
  • FIG. 5 is a schematic structural diagram of a system for blind handover or blind redirection according to the present invention. detailed description
  • the basic idea of the present invention is: when the terminal needs to perform blind handover or blind redirection, it is found whether there is a history of blind handover or blind redirection of the terminal; when there is a history record, according to the history record, select The terminal performs a blind handover or blind redirection of a target cell.
  • the wireless communication network is less likely to perform large-scale network upgrade or re-planning after the network is completed. Therefore, the structure of the network is relatively fixed, and the base station location and cell parameters of the network generally do not change. The community is relatively fixed.
  • the mobile line that is switched or redirected each time during a specific time period is basically fixed.
  • the direction of handover or redirection of the carried terminal is assumed to be...cell A->cell B->cell C...
  • the route from the company to the home, the direction of handover or redirection of the carried terminal is likely to be...cell C->cell B->cell A....
  • the time zone around 8:00 am, the target cell suitable for this terminal handover and redirection is likely to be C; the time period around 5 or 6 o'clock, suitable for this terminal handover and redirection
  • the target cell is likely to be A.
  • the network structure is relatively fixed, people's mobile lines are relatively fixed, and closely related to time.
  • the above three characteristics are reflected in the mobility of the wireless communication network, that is, when switching or redirecting in a certain cell, it is suitable for a certain terminal.
  • the target cell is generally a specific one, which varies according to the time period.
  • FIG. 1 shows an implementation flow of a method for blind handover or blind redirection according to the present invention. As shown in FIG. 1, the method includes the following steps:
  • Step 101 When the terminal needs to perform blind handover or blind redirection, it is found whether there is a history of handover or redirection of the terminal; Specifically, the history of the handover or redirection of the terminal includes the target cell that the terminal has successfully switched or redirected each time, the number of successes corresponding to the target cell, and the time of each occurrence.
  • the base station searches whether the history record of the terminal successfully switching or redirection is stored in the database, and if yes, step 102 is performed; otherwise, according to the existing The traditional blind handover or blind blind redirection selects the target cell.
  • Step 102 When there is a history record, select, according to the history record, a target cell that performs blind handover or blind redirection of the terminal;
  • the target cell that performs the blind handover or the blind redirection of the terminal at the current time needs to comprehensively consider the number of successes and the time factor, and the specific history can be
  • the number of successes of the terminal to all target cells is weighted and accumulated by time difference, and the cell with the highest cumulative sum is selected. For example, in history, a terminal performs 8 times in a certain cell in the morning from 8: 00 to 9: 00 to the C cell. Switching, 6 pm to 6: 00 switch to A cell, 1 night 10: 00 to D cell switch, if the current terminal blind switch or blind redirect time is 5:30 pm, Then, the A cell is selected as the target cell.
  • the method further includes: after the terminal successfully switches or redirects to the target cell, updating a history of the switching or redirection of the terminal, specifically, determining whether the history record of the terminal exists. If yes, further determining whether the target cell that is successfully switched or redirected has been recorded; when the target cell has been recorded, increasing the number of successes of the target cell by one, and recording the current handover or heavy Oriented time; when the history record of the terminal does not exist or the target cell is not recorded, the record of the target cell of the terminal is added, the number of success times of the target cell is set to 1, and the record is recorded.
  • FIG. 2 shows an implementation flow of the first embodiment of the method for blind handover or blind redirection according to the present invention. As shown in FIG. 2, the first embodiment includes the following steps:
  • Step 201 When the terminal needs to perform handover or redirection, the base station determines whether to perform blind handover or blind redirection, and if yes, step 202 is performed, otherwise step 208 is performed;
  • the base station determines that the terminal needs to perform blind handover or blind redirection.
  • Step 202 the base station queries whether there is a history record of the terminal in the database, and if so, step 203 is performed, otherwise step 209 is performed;
  • Step 203 Read the target cell, the number of successes, and the time when the terminal successfully switches or redirects in the history record.
  • Step 204 The base station combines the success times and time factors of the successful handover or redirection of the terminal in the historical record, and selects a target cell in which the terminal performs blind handover or blind redirection;
  • Step 205 the base station commands the terminal to perform handover or redirection to the selected target cell;
  • Step 206 the base station determines whether the terminal handover or redirection is successful, and if yes, step 211 is performed; otherwise, step 207 is performed;
  • Step 207 the base station again re-selects a target cell for the terminal to switch or redirect, according to the success number and the time of the other target cell handover or redirection of the terminal, and then performs step 205;
  • Step 208 the base station controls the terminal to perform optimal switching or redirection according to the measurement result reported by the terminal according to the traditional method, and performs step 210;
  • Step 209 When the history record of the terminal for switching or redirection is not stored in the database, it indicates that the terminal performs handover or redirection for the first time, and the base station controls the terminal to perform blind handover or blind redirection according to a conventional method, and performs Step 210;
  • Step 210 The base station controls the terminal to successfully find the target cell and perform access, and performs steps.
  • Step 211 The base station updates the related history, and the current processing process ends. Specifically, when the history record of the terminal is not stored in the database, the history of the terminal is increased, and the terminal is successfully switched or redirected. The target cell and the occurrence time are recorded, and the number of successes of the target cell that is successfully switched or redirected is set to 1; when the history record of the terminal is already stored in the database, it is further determined whether the history record is recorded in the history record. If the number of successes of the target cell successfully switched or redirected is increased by one, and the time of occurrence is recorded; otherwise, the target cell is added to the history record. Set the number of successes to 1 and record the time.
  • FIG. 3 is a flowchart showing an implementation process of a method for performing blind handover or blind redirection according to the present invention.
  • the second embodiment is specifically a process for a base station to update a history record, which includes the following steps: Step 301: After the terminal is successfully switched or redirected, the base station updates the related history. Specifically, in this step, whether the terminal uses the optimized switching or redirection method with measurement, or the traditional blind switching or blind redirection mode, or After the blind handover or the blind redirection mode is successfully switched or redirected, the base station needs to update the related history.
  • Step 302 the base station determines whether the history record of the terminal exists, if not, step 303 is performed, if yes, step 304 is performed;
  • Step 303 The base station increases the history record of the terminal, sets the number of success times of the current target cell to 1, and records the time, and the current processing flow ends.
  • the history record of the terminal includes the target cell that the terminal handovers or redirects successfully, the number of successes corresponding to the target cell, and the time of each occurrence.
  • Step 304 the base station further determines whether the target cell that has been successfully switched or redirected has been recorded; if yes, go to step 305, otherwise, go to step 306;
  • Step 305 The base station adds 1 to the success number of the target cell, and records the occurrence time, and the current processing flow ends.
  • Step 306 The base station adds the target cell to the history record, and corresponds to the target cell.
  • the number of successes is set to 1, and the time of occurrence is recorded, and the current processing flow ends.
  • FIG. 4 shows a scenario in which the terminal performs blind handover or blind redirection.
  • the cell B covers an intersection, and there are neighboring cells such as A, C, D, E, and F around it.
  • the coverage of the cells is indicated by dashed circles.
  • the terminal 1 moves along the road to the cell C at the coverage edge of the cell B, and the terminal 2 moves along the road to the cells D, E at the coverage edge of the cell B.
  • the base station where the cell B is located needs to perform blind handover to the terminals 1, 2. Then, according to the history table of the terminals 1, 2, referring specifically to Table 1 and Table 2, in conjunction with the current time judgment, the target cell C is selected for the terminal 1, and the target cell D is selected for the terminal 2.
  • the base station where the cell B is located also needs to update the history records of the terminals 1 and 2, as shown in Table 3 and Table 4 after the update:
  • FIG. 5 shows the structure of a system for blind handover or blind redirection according to the present invention.
  • the system includes: a base station 51, a database 52;
  • the base station 51 is configured to: when the terminal needs to perform the blind handover or the blind redirection, whether the history record of the handover or redirection of the terminal exists in the database 52; when the history record exists, according to the history record And selecting, by the terminal, a target cell for blind handover or blind redirection; wherein the history of handover or redirection of the terminal includes the previous handover of the terminal Or the target cell that successfully redirects, the number of successes corresponding to the target cell, and the time of each occurrence.
  • the base station 51 is further configured to update a history of handover or redirection of the terminal after the terminal successfully switches or redirects to the target cell.
  • the base station 51 is specifically configured to determine whether the history record of the terminal exists, and if yes, further determine whether the target cell that is successfully switched or redirected has been recorded; when the target cell has been recorded, Adding the number of successes of the target cell by one, and recording the time of the current handover or redirection; when the history record of the terminal does not exist or the target cell is not recorded, the target of the terminal is added.
  • the record of the cell sets the number of successes corresponding to the target cell to 1, and records the time of the current handover or redirection.
  • the base station 51 is further configured to select a target cell according to a traditional blind handover or blind redirection when there is no history.
  • the base station 51 is specifically configured to select, according to the number of successes and time factors of each cell in the history record, the target cell that performs blind handover or blind redirection; and the target cell needs to be comprehensively considered for the number of successes and time factors.
  • the choice specifically can! In the history of the bus, the number of successes of the terminal to all target cells is weighted and accumulated by the time difference, and the cell with the highest cumulative total is selected.

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Abstract

本发明提供了一种盲切换或盲重定向的方法及系统,所述方法包括:当终端需要进行盲切换或盲重定向时,查找是否存在所述终端的切换或重定向的历史记录;当存在历史记录时,根据所述历史记录,选择出所述终端进行盲切换或盲重定向的目标小区。本发明在终端需要进行盲切换或盲重定向时,基站通过存储的终端之前进行切换或重定向的历史记录,进行目标小区的选择,提高了目标小区选择的准确率,进而提高了盲切换或盲重定向的成功率,减少了反复进行盲切换或盲重定向的过程,节省了网络资源,同时减少了掉话事件的发生概率,提高了用户体验。

Description

一种盲切换或盲重定向的方法及系统 技术领域
本发明涉及无线通信技术领域, 尤其涉及一种盲切换或盲重定向的方 法及系统。 背景技术
在现代无线通信网络中, 通常采用的是蜂窝网络拓朴结构, 一个基站 覆盖的小区周围存在很多相邻的其他小区, 而通常只有其中的一个或几个 小区适合作为终端切换或重定向的目标小区。 又切换或重定向都是网络侧 基站主导的, 这就需要基站在这些相邻小区中做出正确的选择。 一般而言, 在进行切换或重定向时, 需要终端首先将相邻小区的信号质量上报给基站, 基站然后在根据终端的报告结果、 网络负载等信息选择合适的目标小区, 让终端进行切换或重定向。 这样可以使得切换或重定向选择的是最优的 d、 区, 保证切换或重定向的成功率。
但是, 在进行切换或重定向时, 终端和基站建立有无线链路, 也就是 说终端的接收机和发射机都在工作。 受成本、 复杂度、 便携性等因素影响, 终端一般只有一套接收机和发射机, 这样终端进行测量其他相邻小区的信 号质量时比较困难。 终端难以用正在工作的接收机去测量其他小区。 特别 是对于不同频率、 不同制式的相邻小区, 终端更是难以在收发数据的同时 更改工作频率、 制式并去测量其他的相邻小区。
有的标准为了让终端在收发数据时能够测量其他小区, 事先和终端进 行协商, 终端一定的时间内都不收发数据, 而是去测量其他小区。 例如,
LTE标准就规定有测量间隙的机制:如每隔 40ms给终端分配 8ms的测量间 隙。 在测量间隙内终端和基站均不收发数据, 让终端去测量邻区。 但这是 以牺牲数据传输性能为代价的。 如上述 LTE标准, 最多就可以导致 20%的 数据吞吐量下降。
如果需要终端测量一定时间内邻区信号并上报给基站, 然后基站再根 据测量结果选择目标小区, 也会花费时间; 尤其在终端高速运动等需要立 刻进行切换或重定向的场合, 也有可能因为切换或重定向不及时而影响用 户的使用体验。
由于上述因素的影响, 目前不仅仅应用带测量的优化切换或重定向, 盲切换或盲重定向也被广泛应用在现代无线通信网络中。 盲切换或盲重定 向是指基站不要求终端测量邻区并上报, 而是直接命令终端切换到或者重 定向到某个目标小区。 然而毕竟没有测量结果作为选择依据, 基站的盲切 换或盲重定向有可能会选择到并不合适的目标小区, 从而导致失败, 影响 用户体验。 如果反复有多次不成功的盲切换或盲重定向, 还会消耗网络资 源。 发明内容
有鉴于此, 本发明的主要目的在于提供一种盲切换或盲重定向的方法, 能够增大基站将终端盲切换或盲重定向到合适目标小区的概率。
为达到上述目的, 本发明的技术方案是这样实现的:
一种盲切换或盲重定向的方法, 所述方法包括:
当终端需要进行盲切换或盲重定向时, 查找是否存在所述终端的切换 或重定向的历史 i己录;
当存在历史记录时, 根据所述历史记录, 选择出所述终端进行盲切换 或盲重定向的目标小区。
进一步地, 所述方法还包括:
当所述终端向目标小区切换或重定向成功后, 更新所述终端的切换或 重定向的历史 i己录。 其中, 所述更新所述终端的切换或重定向的历史记录为: 判断所述终端的历史记录是否存在, 若是, 则进一步判断本次切换或 重定向成功的目标小区是否已被记录;
当所述目标小区已被记录时, 则将所述目标小区对应的成功次数增加
1 , 并记录本次切换或重定向的时间;
当所述终端的历史记录不存在或所述目标小区未被记录时, 则添加所 述终端的目标小区的记录, 将所述目标小区对应的成功次数设置为 1 , 并记 录本次切换或重定向的时间。
进一步地, 所述方法还包括:
当不存在历史记录时, 按照传统的盲切换或盲重定向选择出目标小区。 其中, 所述根据所述历史记录, 选择出所述终端进行盲切换或盲重定 向的目标小区为:
根据历史记录中各目标小区的成功次数及时间因素, 选择出所述终端 进行盲切换或盲重定向的目标小区。
一种盲切换或盲重定向的系统, 所述系统包括: 基站、 数据库; 其中, 所述基站, 用于在终端需要进行盲切换或盲重定向时, 查找所述数据 库中是否存在所述终端的切换或重定向的历史记录; 当存在历史记录时, 根据所述历史记录, 选择出所述终端进行盲切换或盲重定向的目标小区。
其中, 所述基站, 还用于当所述终端向目标小区切换或重定向成功后, 更新所述终端的切换或重定向的历史记录。
其中, 所述基站, 具体用于判断所述终端的历史记录是否存在, 若是, 则进一步判断本次切换或重定向成功的目标小区是否已被记录; 当所述目 标小区已被记录时, 则将所述目标小区对应的成功次数增加 1 , 并记录本次 切换或重定向的时间; 当所述终端的历史记录不存在或所述目标小区未被 记录时, 则添加所述终端的目标小区的记录, 将所述目标小区对应的成功 次数设置为 1 , 并记录本次切换或重定向的时间。
进一步地, 所述基站, 还用于在不存在历史记录时, 按照传统的盲切 换或盲重定向选择出目标小区。
其中, 所述基站, 具体用于根据历史记录中各小区的成功次数及时间 因素, 选择出所述终端进行盲切换或盲重定向的目标小区。
本发明在终端需要进行盲切换或盲重定向时, 基站通过存储的终端之 前进行切换或重定向的历史记录, 进行目标小区的选择, 提高了目标小区 选择的准确率, 进而提高了盲切换或盲重定向的成功率, 减少了反复进行 盲切换或盲重定向的过程, 节省了网络资源, 同时减少了掉话事件的发生 概率, 提高了用户体验。 附图说明
图 1为本发明盲切换或盲重定向的方法的实现流程示意图;
图 2为本发明盲切换或盲重定向的方法实施例一的实现流程示意图; 图 3为本发明盲切换或盲重定向的方法实施例二的实现流程示意图; 图 4为终端进行盲切换或盲重定向的场景示意图;
图 5为本发明盲切换或盲重定向的系统的结构示意图。 具体实施方式
本发明的基本思想为: 当终端需要进行盲切换或盲重定向时, 查找是 否存在所述终端的盲切换或盲重定向的历史记录; 当存在历史记录时, 根 据所述历史记录, 选择出所述终端进行盲切换或盲重定向的目标小区。
一般来说, 无线通信网络在布网完成后进行大规模网络升级或重新规 划的可能性比较小, 因此网络的结构相对比较固定, 网络的基站位置和小 区参数一般不会变化, 网络间相邻小区相对也较固定。
人们通常在城市或郊区等地方的移动都是有一定规律的, 例如通常倾 向于沿着固定的线路前往比较熟悉或以前经常去的地方。 虽然人们有时也 会改变线路或前往以前没去过的地方, 但这相对来说是少数情况。 例如城 市的上班族, 每天早上沿着固定的线路从家前往公司, 晚上再沿着固定的 线路从公司回到家。 人们前往休闲或购物的场所通常也有固定的目的地和 中间线路, 如周末的上午人们沿着固定的线路前往休闲或购物广场, 晚上 返回家中。
对于某个小区覆盖的地理范围内, 不同的用户因为有不同的移动线路, 对这些终端切换或重定向时的目标小区也不同。 但对于某个特定用户而言, 在特定的时间段内每次切换或重定向的移动线路基本都是固定的。 例如对 于城市中的某个上班族, 每天早上沿固定路线从家到公司, 所携带终端的 切换或重定向方向假设为…小区 A->小区 B->小区 C... , 那么下午沿相反路 线从公司到家,所携带终端的切换或重定向方向就很可能是…小区 C->小区 B->小区 A...。 对于小区 B而言, 上午 8、 9点左右的时间段, 适合作为这 个终端切换和重定向的目标小区很可能是 C; 下午 5、 6点左右的时间段, 适合作为这个终端切换和重定向的目标小区很可能是 A。
网络结构相对固定, 人们的移动线路相对固定, 而且与时间紧密相关, 以上三个特点反映到无线通信网络移动性而言, 就是在某个小区内进行切 换或重定向时, 适合某个终端的目标小区一般也就是特定的几个, 根据时 间段不同而不同。
为使本发明的目的、 技术方案和优点更加清楚明白, 以下举实施例并 参照附图, 对本发明进一步详细说明。
图 1示出了本发明盲切换或盲重定向的方法的实现流程, 如图 1所示, 所述方法包括下述步驟:
步驟 101 , 当终端需要进行盲切换或盲重定向时, 查找是否存在所述终 端的切换或重定向的历史记录; 具体地, 所述终端的切换或重定向的历史记录包括该终端以前每次切 换或重定向成功的目标小区、 所述目标小区对应的成功次数、 以及每次发 生时间。
当终端因为移动等原因需要进行盲切换或盲重定向时, 基站查找数据 库中是否存储有所述终端以前进行成功切换或重定向的历史记录, 若存在, 则执行步驟 102, 否则,按照现有传统的盲切换或盲盲重定向选择出目标小 区。
步驟 102, 当存在历史记录时, 根据所述历史记录, 选择出所述终端进 行盲切换或盲重定向的目标小区;
具体地, 根据历史记录中各目标小区的成功次数及时间因素, 选择出 所述终端本次进行盲切换或盲重定向的目标小区, 需要综合考虑成功次数 和时间因素, 具体可以^!巴历史上该终端向所有目标小区的成功次数用时间 差加权累加, 选择累积总和最高的小区, 例如, 历史上某个终端在某个小 区下进行过 8次早上 8: 00到 9: 00间向 C小区的切换, 6次下午 5: 00 到 6: 00间向 A小区的切换, 1次晚上 10: 00向 D小区的切换, 如果当前 该终端盲切换或盲重定向的时间为下午 5: 30, 则选择 A 小区为目标小 区。
本步驟中, 还可以包括: 当所述终端向所述目标小区切换或重定向成 功后, 更新所述终端的切换或重定向的历史记录, 具体为, 判断所述终端 的历史记录是否存在, 若是, 则进一步判断本次切换或重定向成功的目标 小区是否已被记录; 当所述目标小区已被记录时, 则将所述目标小区对应 的成功次数增加 1 , 并记录本次切换或重定向的时间; 当所述终端的历史记 录不存在或所述目标小区未被记录时, 则添加所述终端的目标小区的记录, 将所述目标小区对应的成功次数设置为 1 , 并记录本次切换或重定向的时 间。 图 2示出了本发明盲切换或盲重定向的方法实施例一的实现流程, 如 图 2所示, 所述实施例一包括下述步驟:
步驟 201 , 当终端需要进行切换或重定向时,基站判断是否进行盲切换 或盲重定向, 若是, 则执行步驟 202 , 否则执行步驟 208;
具体地, 当终端没有上报测量结果给所述基站, 且终端需要进行切换 或重定向时, 基站判断该终端需要进行盲切换或盲重定向。
步驟 202 , 基站查询数据库中是否存在该终端的历史记录, 若是, 则执 行步驟 203 , 否则执行步驟 209;
步驟 203 ,读取该历史记录下终端成功切换或重定向的目标小区、成功 次数以及发生时间;
步驟 204,基站结合所述历史记录下终端成功切换或重定向的成功次数 和时间因素, 选择所述终端进行盲切换或盲重定向的目标小区;
步驟 205 , 基站命令终端向所选目标小区进行切换或重定向; 步驟 206, 基站判断该终端切换或重定向是否成功, 若是, 则执行步驟 211 , 否则, 执行步驟 207;
步驟 207,基站再次结合上述历史记录下所述终端其他目标小区切换或 重定向的成功次数和发生时间, 重新选择一个目标小区供所述终端进行切 换或重定向, 然后执行步驟 205;
步驟 208 ,基站按照传统的方法根据终端上报的测量结果控制终端进行 优化的切换或重定向, 执行步驟 210;
步驟 209,当数据库中未存储有所述终端进行切换或重定向的历史记录 时, 表明该终端第一次进行切换或重定向, 基站按照传统的方法控制终端 进行盲切换或盲重定向, 执行步驟 210;
步驟 210,基站控制终端成功找到所述目标小区并进行接入,执行步驟
211 ; 步驟 211 , 基站更新相关的历史记录, 当前处理流程结束; 具体地, 当数据库中未存储有上述终端的历史记录时, 则增加该终端 的历史记录, 并将本次终端成功切换或重定向的目标小区、 发生时间进行 记录, 将本次切换或重定向成功的目标小区的成功次数设为 1 ; 当数据库中 已存储有上述终端的历史记录时, 则进一步判断该历史记录中是否记录有 本次切换成功或重定向成功的目标小区, 若是, 则将本次终端成功切换或 重定向的目标小区的成功次数加 1 , 并记录发生时间; 否则, 添加该目标小 区到所述历史记录中, 将成功次数设为 1并记录时间。
图 3 示出了本发明盲切换或盲重定向的方法实施例二的实现流程, 如 图 3所示, 所述实施例二具体为基站更新历史记录的过程, 包括以下步驟: 步驟 301 ,当终端切换或重定向成功后,基站进行相关历史记录的更新; 具体的, 本步驟中, 无论终端是采用的带测量的优化切换或重定向方 式, 还是传统的盲切换或盲重定向方式, 或上述本发明提供的盲切换或盲 重定向方式切换或重定向成功后, 基站都要进行相关历史记录的更新。
步驟 302 , 基站判断该终端的历史记录是否存在, 若不存在, 则执行步 驟 303 , 若存在, 则执行步驟 304;
步驟 303 ,基站增加该终端的历史记录, 将本次目标小区的成功次数设 置为 1 , 并记录时间, 当前处理流程结束;
本实施例中, 终端的历史记录包括终端切换或重定向成功的目标小区、 所述目标小区对应的成功次数以及每次发生时间。
步驟 304,基站进一步判断本次切换或重定向成功的目标小区是否已被 记录; 若是, 执行步驟 305 , 否则, 执行步驟 306;
步驟 305 ,基站将上述目标小区对应的成功次数加 1 ,并记录发生时间, 当前处理流程结束;
步驟 306,基站添加上述目标小区到历史记录中,将该目标小区对应的 成功次数设置为 1 , 并记录发生时间, 当前处理流程结束。
图 4示出了终端进行盲切换或盲重定向的场景示意, 如图 4所示, 小 区 B覆盖了一个十字路口, 在它周围有 A、 C、 D、 E、 F等相邻小区, 每 个小区的覆盖范围用虚线圆圈表示。 终端 1在小区 B的覆盖边缘沿着公路 向小区 C移动, 终端 2在小区 B的覆盖边缘沿着公路向小区 D、 E移动。
假设以下情况: 小区 B所在的基站对于终端 1存储的历史记录表明, 具体可参考表 1 , 历史上曾经向小区 A、 C、 D切换或重定向过, 向这三个 小区切换或重定向的成功次数、 发生时间如表 1所示:
表 1
Figure imgf000011_0001
假设以下情况: 小区 B所在的基站对于终端 1存储的历史记录表明, 具体可参考表 2, 历史上曾经向小区 D、 E、 F切换或重定向过, 向这三个 'J、区切换或重定向的成功次数、 发生时间如表 2所示:
表 2
小区标 切换或重定向成 时间
识 功次数
小区 D 5 8:05、 8: 13、 8:28、 8:33、 8:48;
小区 E 1 8:51
小区 F 8 17:05、 17: 13、 17:28、 17:33、 17:48、 17:51、
17:55、 17:56 假设在某一天的早上 8: 30, 小区 B所在的基站需要对终端 1、 2进行 盲切换。 那么根据终端 1、 2的历史记录表, 具体参考表 1和表 2, 结合当 前的时间判断, 给终端 1选择目标小区 C, 给终端 2选择目标小区 D。
盲切换成功完成后, 小区 B所在的基站还要对终端 1、 2的历史记录表 进行更新, 更新后的如表 3和表 4所示:
表 3
Figure imgf000012_0001
图 5示出了本发明盲切换或盲重定向的系统的结构, 如图 5所示, 所 述系统包括: 基站 51、 数据库 52; 其中,
所述基站 51 , 用于在终端需要进行盲切换或盲重定向时, 查找所述数 据库 52中是否存在所述终端的切换或重定向的历史记录; 当存在历史记录 时, 根据所述历史记录, 选择出所述终端进行盲切换或盲重定向的目标小 区; 其中, 所述终端的切换或重定向的历史记录包括该终端以前每次切换 或重定向成功的目标小区、 所述目标小区对应的成功次数、 以及每次发生 时间。
进一步地, 所述基站 51 , 还用于当所述终端向目标小区切换或重定向 成功后, 更新所述终端的切换或重定向的历史记录。
其中, 所述基站 51 , 具体用于判断所述终端的历史记录是否存在, 若 是, 则进一步判断本次切换或重定向成功的目标小区是否已被记录; 当所 述目标小区已被记录时, 则将所述目标小区对应的成功次数增加 1 , 并记录 本次切换或重定向的时间; 当所述终端的历史记录不存在或所述目标小区 未被记录时, 则添加所述终端的目标小区的记录, 将所述目标小区对应的 成功次数设置为 1 , 并记录本次切换或重定向的时间。
进一步地, 所述基站 51 , 还用于在不存在历史记录时, 按照传统的盲 切换或盲重定向选择出目标小区。
其中, 所述基站 51 , 具体用于根据历史记录中各小区的成功次数及时 间因素, 选择出所述终端进行盲切换或盲重定向的目标小区; 需要综合考 虑成功次数和时间因素进行目标小区的选择, 具体可以!巴历史上该终端向 所有目标小区的成功次数用时间差加权累加, 选择累积总和最高的小区。
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。

Claims

权利要求书
1、 一种盲切换或盲重定向的方法, 其特征在于, 所述方法包括: 当终端需要进行盲切换或盲重定向时, 查找是否存在所述终端的切换 或重定向的历史 i己录;
当存在历史记录时, 根据所述历史记录, 选择出所述终端进行盲切换 或盲重定向的目标小区。
2、 根据权利要求 1所述的方法, 其特征在于, 所述方法还包括: 当所述终端向目标小区切换或重定向成功后, 更新所述终端的切换或 重定向的历史 i己录。
3、 根据权利要求 2所述的方法, 其特征在于, 所述更新所述终端的切 换或重定向的历史记录为:
判断所述终端的历史记录是否存在, 若是, 则进一步判断本次切换或 重定向成功的目标小区是否已被记录;
当所述目标小区已被记录时, 则将所述目标小区对应的成功次数增加 1 , 并记录本次切换或重定向的时间;
当所述终端的历史记录不存在或所述目标小区未被记录时, 则添加所 述终端的目标小区的记录, 将所述目标小区对应的成功次数设置为 1 , 并记 录本次切换或重定向的时间。
4、 根据权利要求 1所述的方法, 其特征在于, 所述方法还包括: 当不存在历史记录时, 按照传统的盲切换或盲重定向选择出目标小区。
5、根据权利要求 1所述的方法,其特征在于, 所述根据所述历史记录, 选择出所述终端进行盲切换或盲重定向的目标小区为:
根据历史记录中各目标小区的成功次数及时间因素, 选择出所述终端 进行盲切换或盲重定向的目标小区。
6、 一种盲切换或盲重定向的系统, 其特征在于, 所述系统包括: 基站、 数据库; 其中,
所述基站, 用于在终端需要进行盲切换或盲重定向时, 查找所述数据 库中是否存在所述终端的切换或重定向的历史记录; 当存在历史记录时, 根据所述历史记录, 选择出所述终端进行盲切换或盲重定向的目标小区。
7、 根据权利要求 6所述的系统, 其特征在于, 所述基站, 还用于当所 述终端向目标小区切换或重定向成功后, 更新所述终端的切换或重定向的 历史记录。
8、 根据权利要求 7所述的系统, 其特征在于, 所述基站, 具体用于判 断所述终端的历史记录是否存在, 若是, 则进一步判断本次切换或重定向 成功的目标小区是否已被记录; 当所述目标小区已被记录时, 则将所述目 标小区对应的成功次数增加 1 , 并记录本次切换或重定向的时间; 当所述终 端的历史记录不存在或所述目标小区未被记录时, 则添加所述终端的目标 小区的记录, 将所述目标小区对应的成功次数设置为 1 , 并记录本次切换或 重定向的时间。
9、 根据权利要求 6所述的系统, 其特征在于, 所述基站, 还用于在不 存在历史记录时, 按照传统的盲切换或盲重定向选择出目标小区。
10、 根据权利要求 6所述的系统, 其特征在于, 所述基站, 具体用于 根据历史记录中各小区的成功次数及时间因素, 选择出所述终端进行盲切 换或盲重定向的目标小区。
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