WO2010124461A1 - 快速切换的发现方法及装置 - Google Patents

快速切换的发现方法及装置 Download PDF

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Publication number
WO2010124461A1
WO2010124461A1 PCT/CN2009/071569 CN2009071569W WO2010124461A1 WO 2010124461 A1 WO2010124461 A1 WO 2010124461A1 CN 2009071569 W CN2009071569 W CN 2009071569W WO 2010124461 A1 WO2010124461 A1 WO 2010124461A1
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Prior art keywords
cell
user equipment
fast
handover
fast handover
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PCT/CN2009/071569
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English (en)
French (fr)
Inventor
王君
杨学君
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2009/071569 priority Critical patent/WO2010124461A1/zh
Publication of WO2010124461A1 publication Critical patent/WO2010124461A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00Arrangements for monitoring or testing data switching networks
    • H04L43/16Threshold monitoring

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for discovering fast handover. Background technique
  • the LTE (Long Term Evolution) project is an evolution of 3GPP (3rd Generation Partnership Project), which improves and enhances 3G air access technology and improves the performance and improvement of cell edge users.
  • the cell capacity reduces system delay.
  • LTE adopts OFDM (Orthogonal Frequency Division Multiplex) and MIMO (Multiple Input Multiple Output) as its standard for wireless network evolution, and can provide downlink 100 Mbit/s and uplink in a 20 MHz spectrum bandwidth. Peak rate of 50 Mbit/s.
  • NGMN next generation mobile networks
  • a typical scenario in the mobility optimization sub-topic is fast handover: It is assumed that cells A, B, and C are neighbors, but for some reason (such as planning considerations, cell B cannot directly cover the area). The signal of B will cover the overlapping area of the cell A and the cell C, and the signal of the cell B in the overlapping area is slender, and the mobile path of the UE (User Equipment) is assumed to be the cell A-> Cell B->Cell C. If the parameter setting of cell A is unreasonable, the UE will switch to cell C immediately after switching from cell A to cell B.
  • the normal handover in the above scenario should be from cell A. Switch directly to cell C.
  • the UE since the signal width of the cell B in the overlapping area is very narrow, after the UE switches from the cell A to the cell B, the UE may send a measurement report to the current serving cell B in the future, and the signal of the cell B is weak enough to cause the UE. RLF (Radio Link Failure) has occurred, so in order to avoid this phenomenon, it is also desirable to enable the UE to directly switch from cell A to cell C without switching to B relay.
  • RLF Radio Link Failure
  • the mobility parameters are manually configured according to experience, and then the road test is performed in the field and the related performance, such as handover success rate, dropped call rate, cell selection, cell reselection, and the like, are performed.
  • the mobility parameters are then optimized based on experience.
  • the embodiment of the invention provides a fast handover discovery method, which saves manpower and reduces network maintenance costs.
  • the method includes:
  • the embodiment of the invention further provides a fast switching discovery device, which saves manpower and reduces network maintenance costs.
  • the device includes:
  • a first determining module configured to determine whether a time that the user equipment stays in the cell exceeds a threshold
  • a second determining module configured to determine, when the first determining module determines that the time that the user equipment stays in the cell exceeds a threshold, determining the user equipment A fast handover does not occur in the cell.
  • the first determining module determines that the time that the user equipment stays in the cell does not exceed the threshold, determining that the user equipment performs fast handover in the cell.
  • FIG. 1 is a flowchart of a method for discovering fast handover according to an embodiment of the present invention
  • FIG. 2 and FIG. 3 are schematic diagrams showing a discovery mechanism in an embodiment of the present invention.
  • FIG. 5, FIG. 6, FIG. 7, FIG. 8, FIG. 9, and FIG. 10 are schematic diagrams showing specific implementations of a notification mechanism according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a notification mechanism in an embodiment of the present invention.
  • FIG. 12 are schematic diagrams showing the structure of a fast switching discovery device according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a first determining module according to an embodiment of the present invention.
  • FIG. 15 and FIG. 16 are schematic structural diagrams of a notification module according to an embodiment of the present invention.
  • FIG. 18 is a schematic structural diagram of a handover control module according to an embodiment of the present invention. detailed description
  • the process of the fast handover discovery method may include: Step 101: Determine whether the time that the user equipment stays in the cell exceeds a threshold; if yes, execute step 102; if not, execute step 103. .
  • Step 102 Determine that the user equipment does not perform fast handover in the cell.
  • Step 103 Determine that the user equipment performs fast handover in the cell.
  • the process shown in Figure 1 can automatically detect the fast handover problem. If the user equipment stays in the cell does not exceed the threshold, the user equipment can be considered to have a fast handover in the cell. Compared with the discovery, it can save manpower and reduce network maintenance costs.
  • the method may include: detecting a time when the user equipment accesses the cell, a time of leaving the cell, calculating a difference between the two, and determining that the user equipment is The time when the cell stays is compared with the threshold to determine whether the time that the user equipment stays in the cell exceeds a threshold.
  • the processing flow may be as follows:
  • the difference between the two moments is calculated, and the time that the user equipment stays in the cell is determined. By comparing the time with the threshold, it is determined whether the time that the user equipment stays in the cell exceeds a threshold.
  • the following is a specific example to illustrate the discovery mechanism of the fast handover problem in this embodiment: As shown in the schematic diagram of the discovery mechanism, when the fast handover problem occurs, the user equipment is switched from the cell A to the cell B, so the cell B It is possible to accurately understand the user equipment accessing the cell.
  • the time that the user equipment stays in the cell B can be calculated by the cell B, and the time is compared with the threshold; The cell B periodically or irregularly reports the time to the cell A, and the cell A compares the time with the threshold. Of course, the cell B can also periodically or irregularly access the user equipment to the cell B. The time point 7 ⁇ leaving cell B is reported to cell A, and cell A calculates the time that the user equipment stays in cell B, and compares the time with the threshold.
  • a threshold for example, 2 s.
  • Administration and Maintenance or other similar devices, such as MME (Mobility Management Entity), eNB (eNodeB, base station), etc., set a threshold (Time_threshold) as needed, and obtain 1 ⁇ Then, it is compared with the Time-threshold to determine whether a fast handover has occurred in the cell B.
  • MME Mobility Management Entity
  • eNB eNodeB, base station
  • step 101 may also be as follows: When the user equipment accesses the cell, a timer is started, and when the user equipment leaves the cell, it is determined by determining whether the timer expires. Whether the time that the user equipment stays in the cell exceeds a threshold. That is, the processing flow can be as follows:
  • the timer is started when the user equipment accesses the cell
  • determining that the user equipment stays in the cell exceeds a threshold, that is, the user equipment does not perform fast handover in the cell; if there is no timeout, determining, when the user equipment stays in the cell The threshold is not exceeded, that is, the user equipment performs fast handover in the cell.
  • a timer may be set for the cell B by an OAM or other similar device, such as an MME, an eNB, or the like as needed. Starting from the time when the user equipment accesses the cell B, the timer starts to count, and it is determined whether the time that the user equipment stays in the cell B is less than a threshold by determining whether the timer expires, thereby determining whether a fast handover occurs.
  • step 101 may also be as follows: Obtaining the cutting of the user equipment And changing the history information; extracting the stay time in the previous cell from the handover history information of the user equipment, and comparing the time with the threshold, determining whether the time that the user equipment stays in the cell exceeds a threshold.
  • the user history information is a history list of the switched cell of the active user equipment, including the cell list that the user equipment has previously switched, and the time value (in seconds) that the user station stays in each cell.
  • UE History Information is a history list of the switched cell of the active user equipment, including the cell list that the user equipment has previously switched, and the time value (in seconds) that the user station stays in each cell.
  • the first cell is cell A
  • the second cell is cell B
  • the third cell is cell C.
  • the user equipment initiates a service in cell A, and is handed over by cell A to cell B (the stay time in cell A is ⁇ ), and then the cell B switches to the cell.
  • the UE History Information of the user equipment includes the identification information of the staying in the cell A and the cell B, and the staying time. As shown in Table 1.
  • the cell C can transmit the UE history information to the cell A periodically or irregularly. After receiving the information, the cell A can view that the user equipment has stayed in both the cell A and the cell B, and the time is respectively For 10s and ls, if a threshold is set to 2S, the time (Is) staying in the cell B is less than the threshold (2s), so the cell A can consider that the user equipment occurs once before switching from the cell B to the cell C. Fast switching, that is, the time spent in cell B is too short.
  • Cell C may not have to pass the UE History Information to cell A, but instead Use the UE History Information to discover the problem. For example, cell C can view the UE History Information and find that the UE has stayed in both cell A and cell B, and the time is 10s and ls, respectively, because the time (Is) staying in cell B is less than the threshold (assumed to be 2s) Therefore, the cell C considers that the user equipment has a fast handover before the handover from the cell B to the cell C, that is, the time spent in the cell B is too short.
  • the OAM may set a threshold (Time-threshold) according to the requirement, and after obtaining the time of the user equipment staying in the cell in the UE History Information, and then the time - The threshold is compared to determine if a fast handoff has occurred in the cell.
  • a threshold Time-threshold
  • the user equipment may notify the cell that causes the fast handover to occur after the fast handover occurs in the cell.
  • the fast switching problem notification is automatically realized, which can save manpower and reduce network maintenance cost compared with the prior art notification of relying on manual quick quick change.
  • the cell that causes the fast handover to occur may be: the previous cell of the first cell in the fast-switching cell adjacent to the handover path of the user equipment; : the previous cell of the cell in which the fast handover occurs for each of the handover paths of the user equipment.
  • the user device's switching history is: A -> B (Rapid HO) -> C (Rapid HO) -> D-> E.
  • the user equipment does not have fast handover in cells VIII, D, and E, and fast handover occurs in cells 8, C. Then, it can be considered that the fast handover of the cells B and C is caused by the small area A, and the previous cell of the first cell in the fast handover cell adjacent to the handover path of the user equipment.
  • the notification mechanism may be implemented in multiple ways:
  • the latter one of the last cells in the adjacent fast-switching cell
  • the cell sends a notification message (Rapid HO problem) to the previous cell of the first cell.
  • a notification message (Rapid HO problem)
  • cells that are adjacent to the fast handover are cells B and C
  • the cell D sends a notification message to the cell A.
  • the cell D can detect the time that the user equipment stays in the cell, for example, by using the foregoing timer or threshold, to determine that the user equipment stays in the cell exceeds the threshold, that is, the cell D does not have a fast handover;
  • the cell B and the cell C may be quickly switched according to the historical information of the user equipment.
  • the cell A is not a fast handover. Therefore, the cell A is considered to be a problem cell that causes fast handover.
  • the notification message may be forwarded to each cell of the first consecutive fast handover cell by the neighboring cell that is subjected to the handover by the user equipment recorded in the handover history record.
  • the neighboring cell that is subjected to the handover by the user equipment recorded in the handover history record.
  • the cell D forwards the notification message to the cell through the cell C and the cell B.
  • the message carries the identifiers of the cells B and A, such as CGI, frequency, PCI, etc., for routing. Similar to FIG.
  • the cell D can determine that no fast handover occurs in the cell D, and if a fast handover occurs in the cells B and C, the notification message is sent to the cell C, the cell C is forwarded to the cell B, and finally the cell B is forwarded to the cell B.
  • Cell A
  • a notification message may be sent to the previous cell of the first fast-switching cell by the second cell behind the last cell in the adjacent fast-switching cell.
  • the adjacent cells that have fast handover are cells B and C
  • the cell E sends a notification message to the cell A.
  • the cell E can determine that no fast handover occurs in the cell D according to the historical information of the user equipment, and if a fast handover occurs in the cells B and C, the notification message is sent to the cell A.
  • the notification message may be forwarded to each cell by the user equipment that belongs to the user equipment that is recorded in the handover history record by the second cell behind the last cell in the adjacent fast-switching cell.
  • the previous cell of a cell As shown in FIG. 7, in this example, if the neighboring fast-switching cells are cells B and C, the cell E will sequentially send the notification message to the cell. D, C, B, forwarded to cell A. Similar to FIG. 6, the cell E may determine that a fast handover occurs in the cells B and C according to the historical information of the user equipment, and if the handover does not occur in the cell D, the notification message is sent to the cell D, and the cell D is forwarded to the cell C. It is forwarded by cell C to cell B, and finally forwarded by cell B to cell A.
  • Each message may carry the identifier of the relevant cell, such as the CGI, frequency, PCI, etc. of the cell ⁇ C, D, for routing purposes.
  • the notification mechanism may be implemented in multiple manners:
  • the cell that generates the fast handover may send a notification message to the previous cell of the fast-switching cell.
  • the adjacent fast-switching cell is the cell B, C
  • the cell B detects the fast handover, and sends a notification message to the problem cell A
  • the cell C detects the fast handover, and sends a notification message to the problem cell B
  • the cells B and C can detect the user equipment in the cell by itself.
  • the staying time for example, by using the foregoing timer or threshold method, determines that the time that the user equipment stays in the local cell does not exceed the threshold, that is, a fast handover occurs in the local cell.
  • the next cell of the fast-switching cell sends a notification message to the previous cell of the fast-switching cell.
  • the neighboring fast-switching cells are cells B and C
  • the cell C detects that the user equipment has quickly switched in the cell B, and sends a notification message to the cell A;
  • the user equipment is detected to have a fast handover in the cell C, and a notification message is sent to the cell B.
  • the cell C may determine that the cell B has a fast handover according to the historical information of the user equipment;
  • the cell D may determine that the cell C has a fast handover according to the historical information of the user equipment.
  • the next cell of the fast-switching cell forwards the notification message to the previous cell of the fast-switching cell via the fast-switching cell.
  • the adjacent cell that performs fast handover is cell C
  • the cell C forwards the notification message to the cell A through the cell B
  • the cell D forwards the notification message to the cell B through the cell C.
  • the cell C determines the cell B according to the historical information of the user equipment. If a fast handover occurs, the notification message is sent to the cell B, and the cell B is forwarded to the corresponding problem cell A.
  • the cell D determines that the cell C has a fast handover according to the historical information of the user equipment, and then sends a notification message to the cell C. It is forwarded by the cell C to the corresponding problem cell B.
  • Figure 11 also shows a signal flow diagram of a notification mechanism, including sending a notification message.
  • a notification message can also be selectively sent in the implementation.
  • the above notification and feedback message may be an X2 message, an S1 message, or may be transited by OAM.
  • the message may be an extension of an existing message to support the function, such as augmenting a Handover Request, Handover Request Acknowledge, or adding a new message to implement the function.
  • the notification message can carry any combination of the following specific parameters to describe the problem:
  • CGI Cell Global Identifier
  • PCI Protocol Control Information
  • frequency point PLMN (Public Land Mobile Network) Identification
  • the notification message may further include information about the target cell, such as a cell identifier (such as a CGI, a PCK frequency, and a PLMN identifier).
  • a cell identifier such as a CGI, a PCK frequency, and a PLMN identifier
  • the user equipment is determined in the discovery method according to the fast switching described above. After a fast handover occurs in a cell and the cell that causes the fast handover occurs is notified, the probability that the user equipment is switched to the cell in which the fast handover occurs may be reduced by the cell that causes the fast handover to occur. Therefore, the problem of fast switching is solved; compared with the solution of the manual quick-change problem in the prior art, the manpower can be saved and the network maintenance cost can be reduced.
  • the cell that causes the fast handover to occur may be configured to reduce the switching parameters of the local cell, such as Hys, CIO (Cell Individual Offset, cell personality offset), etc., to reduce the user equipment to switch to fast switching.
  • the probability of the cell For example, in the scenario shown in FIG. 2, it is possible to make handover from cell A to cell B difficult by adjusting handover parameters, and it is easy to switch from cell A to cell C to increase switching of A->C. Probability, and reduce the switching probability of A->B.
  • the cell that causes the fast handover to occur may also reduce the probability that the user equipment switches to the cell in which the fast handover occurs by modifying the handover decision algorithm of the local cell.
  • a person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium.
  • the method may include all or part of the steps in the foregoing embodiment, and the storage medium may include: a ROM, a RAM, a magnetic disk, an optical disk, and the like.
  • a discovery device for fast handover is also provided in the embodiment of the present invention, as described in the following embodiments. Since the principle of solving the problem of the device is similar to the method for discovering the fast switching, the implementation of the device can be referred to the implementation of the method, and the repeated description will not be repeated.
  • the fast handover discovery device in the embodiment of the present invention may include: a first determining module 1201, configured to determine whether a time that the user equipment stays in the cell exceeds a threshold;
  • a second determining module 1202 configured to determine, at the first determining module, that the user equipment stays in the cell When the time exceeds the threshold, it is determined that the user equipment does not perform fast handover in the cell; when the first determining module determines that the time that the user equipment stays in the cell does not exceed the threshold, determining that the user equipment occurs in the cell Quickly switch.
  • the first determining module 1201 may include one or any combination of the following modules:
  • the first determining unit 1301 is configured to detect a time when the user equipment accesses the cell, a time when the user leaves the cell, calculate a difference between the two, and determine a time for the user equipment to stay in the cell, by using the Comparing the time with the threshold, determining whether the time that the user equipment stays in the cell exceeds a threshold;
  • a second determining unit 1302 configured to start a timer when the user equipment accesses the cell, and determine, by the user equipment, whether the timer expires when the user equipment leaves the cell, Whether the time the cell stays exceeds the threshold;
  • the third determining unit 1303 is configured to acquire historical information of the user equipment, extract the time from the historical information of the user equipment, and determine that the user equipment stays in the cell by comparing the time with a threshold. Whether the time exceeds the threshold.
  • the discovery apparatus shown in FIG. 12 may further include: a notification module 1401, configured to: after the second determining module 1202 determines that the user equipment performs a fast handover in the cell, notifying that the fast handover occurs Community.
  • the notification module 1401 may include:
  • the first notification unit 1501 is configured to trigger a next cell of the last cell in the adjacent fast-switching cell on the handover path of the user equipment, to the front of the first cell in the adjacent fast-switching cell A cell sends a notification message;
  • the second notification unit 1502 is configured to trigger the next cell of the last cell, and forward the notification message to the previous cell of the first cell by using each of the preceding cells; or, the third notification unit 1503.
  • the fourth notification unit 1504 is configured to trigger a second cell that is behind the last cell in the adjacent fast-switching cell, and forward the notification message to the first cell by using each of the preceding cells. The former cell.
  • the notification module 1401 may include:
  • a fifth notification unit 1601 configured to trigger a cell that performs fast handover on the handover path of the user equipment to send a notification message to a previous cell of the fast-switching cell;
  • the sixth notification unit 1602 is configured to: send, to each of the cells in which the fast handover occurs, a subsequent cell that triggers the fast handover to send a notification message to the previous cell of the fast handover cell;
  • the seventh notification unit 1603 is configured to: for each of the cells that have a fast handover, trigger a subsequent cell of the cell that performs the fast handover to forward the notification message to the fast-switching cell via the fast-switching cell. The previous cell.
  • the fast switching discovery device shown in FIG. 14 may further include:
  • the handover control module 1701 is configured to trigger, after the notification module 1401 notifies the cell that causes the fast handover to occur, the cell that causes the fast handover to occur to reduce the probability that the user equipment switches to the cell in which the fast handover occurs.
  • the handover control module 1701 may include:
  • the first handover control unit 1801 is configured to trigger the cell that causes the fast handover to occur, by adjusting the handover parameter of the local cell, and reduce the probability that the user equipment switches to the cell in which the fast handover occurs;
  • the second handover control unit 1802 is configured to trigger a cell that causes fast handover to occur, by modifying a handover decision algorithm of the local cell, and reducing a handover of the user equipment to a cell in which fast handover occurs.
  • it is determined whether the time that the user equipment stays in the cell exceeds a threshold; if yes, determining that the user equipment does not perform fast handover in the cell; if not, determining the user setting A fast handover occurs in the cell, thereby automatically discovering a fast handover problem;
  • the cell that causes the fast handover to occur is notified, and the fast handover problem notification is automatically implemented;
  • the probability that the user equipment causing the fast handover occurs is switched to the cell in which the fast handover occurs, thereby solving the fast handover problem;
  • the above-mentioned embodiments of the present invention can save manpower and reduce network maintenance costs.

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Description

快速切换的发现方法及装置
技术领域
本发明涉及通信技术领域, 尤其涉及快速切换的发现方法及装置。 背景技术
LTE (Long Term Evolution, 长期演进) 项目是 3GPP (3rd Generation Partnership Project, 第三代移动通信标准化组织) 的演进, 它改进并增强了 3G的空中接入技术, 改善了小区边缘用户的性能、提高了小区容量、 降低了 ***延迟。 LTE采用 OFDM (Orthogonal Frequency Division Multiplex, 正交 频分复用) 和 MIMO (Multiple Input Multiple Output, 多入多出) 作为其无 线网络演进的标准, 在 20MHz频谱带宽下能够提供下行 100Mbit/s与上行 50Mbit/s的峰值速率。
从商业运营角度出发, 运营商要求更低的建网和运营成本, 以便为广大 用户提供更低价格的网络服务来赢得市场。 降低建网价格的关键因素是提高 频谱利用率、简化网络结构、提供更低成本的无线基站、增强可维护性功能。 为此, NGMN (next generation mobile networks, 下一代移动通信网络)组织 在其***中提出了关于 SON (Self Optimized Network, 自组织网络) 的需 求。
在 SON的研究中,其中有一个子课题就是研究移动性优化。移动性优化 子课题中的一个典型场景为快速切换: 假设小区 A、 B、 C都是邻区, 但是 由于某种原因 (比如规划时的考虑, 不能直接让小区 B不覆盖该区域), 小 区 B的信号会覆盖到小区 A与小区 C的交叠区域, 并且小区 B在该交叠区 域的信号是细长形的, 再假设 UE (User Equipment, 用户设备) 的移动路径 为小区 A->小区 B->小区 C, 如果小区 A的参数设置不合理, 就会导致 UE 在从小区 A切换到小区 B后, 又马上切换到小区 C。
为了减少切换并节省资源, 希望上述场景下正常的切换应当为从小区 A 直接切换到小区 C。 此外, 由于小区 B在交叠区域的信号宽度非常窄, UE 在从小区 A切换到小区 B后, 在还未来得及向当前的服务小区 B发送测量 报告, 小区 B的信号就已经弱到导致 UE发生 RLF (Radio Link Failure, 无 线链路失败) 了, 因此为了避免这种现象出现, 也希望使 UE能够从小区 A 直接切换到小区 C, 而不需要切换到 B中转。
现有技术为解决避免出现上述快速切换问题, 由人工根据经验配置移动 性参数, 然后进行实地路测并统计相关性能, 如切换成功率、 掉话率、 小区 选择、 小区重选等性能指标, 再根据经验对移动性参数进行优化。
发明人发现上述现有技术存在如下不足:
由人工来进行问题的发现、 通知, 并根据经验来解决问题, 将耗费大量 人力、 网络维护成本偏高。 发明内容
本发明实施例提供一种快速切换的发现方法, 用以节省人力、 降低网络 维护成本, 该方法包括:
确定用户设备在小区停留的时间是否超过阈值;
若是, 则确定所述用户设备在所述小区未发生快速切换;
若否, 则确定所述用户设备在所述小区发生快速切换。
本发明实施例还提供一种快速切换的发现装置, 用以节省人力、 降低网 络维护成本, 该装置包括:
第一确定模块, 用于确定用户设备在小区停留的时间是否超过阈值; 第二确定模块, 用于在所述第一确定模块确定用户设备在小区停留的时 间超过阈值时, 确定所述用户设备在所述小区未发生快速切换; 在所述第一 确定模块确定用户设备在小区停留的时间未超过阈值时, 确定所述用户设备 在所述小区发生快速切换。
本发明实施例中,确定用户设备在小区停留的时间是否超过阈值;若是, 则确定所述用户设备在所述小区未发生快速切换; 若否, 则确定所述用户设 备在所述小区发生快速切换, 从而自动发现快速切换问题; 以便于后续实现 快速切换问题的通知和解决; 与现有技术中依靠人工进行快速快换问题的发 现相比, 可以节省人力、 降低网络维护成本。 附图说明
此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部 分, 并不构成对本发明的限定。 在附图中:
图 1为本发明实施例快速切换的发现方法流程图;
图 2、 图 3为本发明实施例中发现机制的示意图;
图 4、 图 5、 图 6、 图 7、 图 8、 图 9、 图 10为本发明实施例中通知机制 的具体实现示意图;
图 11为本发明实施例中通知机制的示意图;
图 12、 图 14、 图 17为本发明实施例中快速切换的发现装置的结构示意 图;
图 13为本发明实施例中第一确定模块的结构示意图;
图 15、 图 16为本发明实施例中通知模块的结构示意图;
图 18为本发明实施例中切换控制模块的结构示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚明白, 下面结合说 明书附图对本发明实施例做进一步详细说明。 在此, 本发明的示意性实施例 及其说明用于解释本发明, 但并不作为对本发明的限定。
如图 1所示, 本发明实施例中, 快速切换的发现方法流程可以包括: 步骤 101、 确定用户设备在小区停留的时间是否超过阈值; 若是, 则执 行步骤 102; 若否, 则执行步骤 103。 步骤 102、 确定所述用户设备在所述小区未发生快速切换。
步骤 103、 确定所述用户设备在所述小区发生快速切换。
图 1所示流程可以自动发现快速切换问题, 即若用户设备在小区停留的 时间未超过阈值, 则可以认为该用户设备在该小区发生了快速切换, 与现有 技术中依靠人工进行快速切换问题的发现相比, 可以节省人力、 降低网络维 护成本。
步骤 101的实施方式可以有多种, 在一个实施例中可以包括: 检测所述 用户设备接入所述小区的时刻、 离开所述小区的时刻, 计算二者之差, 确定 所述用户设备在所述小区停留的时间, 通过将该时间与阈值进行比较, 确定 所述用户设备在所述小区停留的时间是否超过阈值。 举一例, 该例中检测所 述用户设备接入所述小区的时刻、 离开所述小区的时刻, 则处理流程可以如 下:
记录所述用户设备接入所述小区的时刻;
记录所述用户设备离开所述小区的时刻;
计算前述两个时刻之差, 确定所述用户设备在所述小区停留的时间; 通过将该时间与阈值进行比较, 确定所述用户设备在所述小区停留的时 间是否超过阈值。
下面举一具体实例, 说明本实施例中快速切换问题的发现机制: 如图 2所示的发现机制示意图, 当快速切换问题出现时, 由于用户设备 是从小区 A切换到小区 B,因此小区 B是可以精确地了解用户设备接入小区
B的时间点7^ 以及用户设备离开小区 B的时间点7^ 并计算出用户设备在 小区 B中所停留的时间:
STB =TB -T , 并将^ i与阈值 (例如 2s)进行比较, 如果停留时间小于阈值, 则认为 发生了快速切换; 否则认为未发生快速切换。 实施中, 可以由小区 B计算出 用户设备在小区 B中所停留的时间, 并将该时间与阈值进行比较; 也可以由 小区 B定期或不定期地将该时间上报给小区 A,由小区 A将该时间与阈值进 行比较; 当然, 小区 B也可以定期或不定期地将用户设备接入小区 B的时间 点^'、离开小区 B的时间点7 ^上报给小区 A, 由小区 A计算出用户设备在小 区 B中所停留的时间, 并将该时间与阈值进行比较。
本例中,在具体实现对快速切换问题的发现时,可以由 OAM( Operations,
Administration and Maintenance, 运行、 管理和维护) 或其它类似设备, 如 MME (Mobility Management Entity, 移动管理实体), eNB (eNodeB, 基站) 等根据需要设置一个阈值 ( Time— threshold ), 在获得了1^后, 再与该 Time— threshold进行比较, 从而确定在小区 B是否发生了快速切换。
在另一实施例中, 步骤 101的实施也可以如下: 在所述用户设备接入所 述小区时启动定时器, 在所述用户设备离开所述小区时通过判断所述定时器 是否超时, 确定所述用户设备在所述小区停留的时间是否超过阈值。 即, 处 理流程可以如下:
预先设置一定时器的值;
在所述用户设备接入所述小区时启动该定时器;
在所述用户设备离开所述小区时判断该定时器是否超时;
若超时, 则确定所述用户设备在所述小区停留的时间超过阈值, 即所述 用户设备在所述小区未发生快速切换; 若没有超时, 则确定所述用户设备在 所述小区停留的时间未超过阈值,即所述用户设备在所述小区发生快速切换。
仍以图 2的场景为例, 则在本实施例中具体实现对快速切换问题的发现 时, 可以由 OAM或其它类似设备, 如 MME, eNB等根据需要为小区 B设 置一个定时器 (timer), 从用户设备接入小区 B的时间点^'启动定时器开始 计时, 通过判断 timer是否超时确定用户设备在小区 B停留的时间是否小于 阈值, 从而确定是否发生快速切换。
在另一实施例中, 步骤 101的实施也可以如下: 获取所述用户设备的切 换历史信息; 从所述用户设备的切换历史信息中提取所述在先前小区中的停 留时间, 通过将该时间与阈值进行比较, 确定所述用户设备在所述小区停留 的时间是否超过阈值。
用户设备的历史信息 (UE History Information) 是激活态用户设备的切 换小区的历史记录列表, 包括用户设备之前切换过的小区列表, 以及在各个 小区停留的时间值(单位可以是秒)。下面举一具体实例, 说明本实施例中快 速切换问题的发现机制。 本例中, 第一小区为小区 A, 第二小区为小区 B, 第三小区为小区 C。
如图 3所示的发现机制示意图, 用户设备在小区 A发起业务, 并且由小 区 A切换到小区 B (在小区 A中停留时间为 ^ ), 然后由小区 B切换到小区
C (在小区 B中停留时间为 ^ ), 然后在小区 C中终止业务 (在小区 C中停 留时间为 。
从小区 C看来,该用户设备的 UE History Information中包括了在小区 A、 小区 B停留的标识信息、 及停留时间。 如表 1所示。
表 1 小区 C中显示的 UE History Information
Figure imgf000008_0001
小区 C可以定期或不定期地将 UE History Information传递给小区 A,小 区 A在接收到该信息后, 通过查看该信息, 可以发现该用户设备曾经在小区 A和小区 B都停留过, 并且时间分别为 10s和 ls, 若设定一个阈值为 2S, 则 在小区 B所停留的时间 (Is) 小于阈值 (2s), 因此小区 A可以认为用户设 备在从小区 B到小区 C的切换前发生了一次快速切换,即在小区 B中停留的 时间过短。
小区 C也可以不必向小区 A传递该 UE History Information,而是自行利 用 UE History Information来进行问题的发现。 例如, 小区 C可以查看 UE History Information, 并发现该 UE曾经在小区 A和小区 B都停留过, 并且时 间分别为 10s和 ls,因为在小区 B所停留的时间(Is)小于阈值(假设为 2s), 因此小区 C认为用户设备在从小区 B到小区 C的切换前发生了一次快速切 换, 即在小区 B中停留的时间过短。
本例中, 在具体实现对快速切换问题的发现时, 可以由 OAM根据需要 设置一个阈值 (Time— threshold), 在获得了 UE History Information中用户设 备在某小区停留的时间后, 再与该 Time— threshold进行比较, 从而确定在该 小区是否发生了快速切换。
本发明实施例中, 在按上述快速切换的发现方法确定用户设备在小区发 生快速切换后, 可以通知导致快速切换发生的小区。 从而自动实现快速切换 问题通知, 与现有技术中依靠人工进行快速快换问题的通知相比, 可以节省 人力、 降低网络维护成本。
若用户设备在至少一个小区发生快速切换; 则导致快速切换发生的小区 可以是: 所述用户设备的切换路径上相邻的发生快速切换的小区中第一个小 区的前一个小区; 也可以是: 所述用户设备的切换路径上每一个发生快速切 换的小区的前一个小区。
下面举一例详细说明本实施例中的快速切换通知机制。
本例中, 用户设备的切换历史为: A -> B (Rapid HO) ->C (Rapid HO) -> D-> E。 在该场景中, 用户设备在小区八、 D、 E中没有发生快速切换, 在小 区8、 C中发生了快速切换。 则可以认为: 小区 B、 C发生快速切换是由小 区 A导致的, 用户设备的切换路径上相邻的发生快速切换的小区中第一 个小区的前一个小区。
若是由用户设备的切换路径上相邻的发生快速切换的小区中第一个小区 的前一个小区导致快速切换, 则通知机制的实现方式可以有多种:
例如, 可以由所述相邻的发生快速切换的小区中最后一个小区的后一个 小区, 向所述第一个小区的前一个小区发送通知消息 (Rapid HO problem)。 如图 4所示, 本例中, 相邻的发生快速切换的小区为小区 B、 C, 则由小区 D 向小区 A发送通知消息。小区 D可以自行检测用户设备在本小区内所停留时 间, 例如通过前述定时器或阈值的方法, 确定用户设备在本小区所停留时间 超过阈值, 即小区 D没有发生快速切换; 同时, 小区 D也可以根据用户设备 的历史信息确定小区 B、小区 C发生了快速切换; 而小区 A没有发生快速切 换, 因此可以认为小区 A是导致快速切换的问题小区;则直接通知小区 A快 速切换问题。
又如, 可以由所述最后一个小区的后一个小区, 将通知消息经由切换历 史记录中记录的所属用户设备经历切换的各个小区, 转发给所述第一个发生 连续快速切换小区的前一个小区。 如图 5所示, 本例中, 相邻的发生快速切 换的小区为小区8、 C, 则由小区 D将通知消息经小区 C、 小区 B转发给小 区 。 其中, 消息中携带有小区 B、 A的标识例如 CGI、 频点、 PCI等以用 于路由。与图 4类似,小区 D可以确定在小区 D未发生快速切换,在小区 B、 C发生了快速切换, 则将通知消息发送给小区 C, 由小区 C转发给小区 B, 最后由小区 B转发给小区 A。
又如, 可以由所述相邻的发生快速切换的小区中最后一个小区的后面第 二个小区, 向所述第一个发生快速切换的小区的前一个小区发送通知消息。 如图 6所示, 本例中, 相邻的发生快速切换的小区为小区 B、 C, 则由小区 E 向小区 A发送通知消息。小区 E可以根据用户设备的历史信息, 确定在小区 D未发生快速切换, 在小区 B、 C发生了快速切换, 则向小区 A发送通知消 息。
又如, 可以由所述相邻的发生快速切换的小区中最后一个小区的后面第 二个小区, 将通知消息经由切换历史记录中记录的所属用户设备经历切换的 各个小区, 转发给所述第一个小区的前一个小区。 如图 7所示, 本例中, 相 邻的发生快速切换的小区为小区 B、 C, 则由小区 E将通知消息依次经小区 D、 C、 B, 转发给小区 A。 与图 6类似, 小区 E可以根据用户设备的历史信 息, 确定在小区 B、 C发生了快速切换, 在小区 D未发生切换, 则将通知消 息发给小区 D, 由小区 D转发给小区 C, 由小区 C转发给小区 B, 最后由小 区 B转发给小区 A。其中,各消息中可以携带相关小区的标识,例如小区^ C、 D的 CGI、 频点、 PCI等, 以用于路由目的。
若是由所述用户设备的切换路径上每一个发生快速切换的小区的前一个 小区导致快速切换, 则通知机制的实现方式也可以有多种:
例如, 可以由所述每一个发生快速切换的小区向该发生快速切换的小区 的前一个小区发送通知消息; 如图 8所示, 本例中, 相邻的发生快速切换的 小区为小区 B、 C, 则由小区 B检测快速切换, 并向问题小区 A发送通知消 息; 由小区 C检测快速切换, 并向问题小区 B发送通知消息; 其中, 小区 B、 C可以自行检测用户设备在本小区内所停留时间, 例如通过前述定时器或阈 值的方法, 确定用户设备在本小区所停留时间未超过阈值, 即在本小区发生 了快速切换。
又如, 对所述每一个发生快速切换的小区, 由该发生快速切换的小区的 后一个小区向该发生快速切换的小区的前一个小区发送通知消息。 如图 9所 示, 本例中, 相邻的发生快速切换的小区为小区 B、 C, 则由小区 C检测用 户设备在小区 B发生了快速切换, 并向小区 A发送通知消息; 由小区 D检 测用户设备在小区 C发生了快速切换, 并向小区 B发送通知消息。 小区 C 可以根据用户设备的历史信息确定小区 B发生了快速切换;小区 D可以根据 用户设备的历史信息确定小区 C发生了快速切换。
又如, 对所述每一个发生快速切换的小区, 由该发生快速切换的小区的 后一个小区将通知消息经由该发生快速切换的小区转发给该发生快速切换的 小区的前一个小区。如图 10所示, 本例中, 相邻的发生快速切换的小区为小 区 C, 则由小区 C将通知消息经小区 B转发给小区 A; 由小区 D将通知 消息经小区 C转发给小区 B。小区 C根据用户设备的历史信息确定小区 B发 生了快速切换, 则将通知消息发送给小区 B, 由小区 B转发给相应的问题小 区 A; 小区 D根据用户设备的历史信息确定小区 C发生了快速切换, 则将通 知消息发送给小区 C, 由小区 C转发给相应的问题小区 B。
图 11还给出了一个通知机制的信号流示意图, 其中包括发送通知消息, 当然实施中也可以选择性地发送 ACK (反馈) 消息。
上述的通知、 反馈消息可以是 X2消息、 S1消息, 也可以由 OAM中转。 该消息可以是对现有消息进行扩充以支持该功能, 例如扩充 Handover Request (切换请求), Handover Request Acknowledge (切换请求响应), 也可以是新增消息以实现该功能。
通知消息中可以携带以下具体参数的任意组合以用于描述问题:
A ) 导致快速切换问题发生的小区的标识, 例如 CGI ( Cell Global Identifier,全球小区标识)、 PCI (Protocol Control Information协议控制信息)、 频点、 PLMN (Public Land Mobile Network, 公众陆地移动电话网) 标识等;
B) 中转小区的标识, 例如 CGI (Cell Global Identifier, 全球小区标识)、 PCI (Protocol Control Information协议控制信息)、频点、 PLMN (Public Land Mobile Network, 公众陆地移动电话网) 标识等;
C) Cause (原因值), 例如 "Rapid Handover (快速切换)"或其它类似 原因等;
D) Stay Time (停留时间), 即发生快速切换时,在小区中所停留的时间;
E) UE History Information?
如果是该通知消息需要由其它小区进行转发, 则该通知消息中还可以包 括目的小区的相关信息, 例如小区标识 (如 CGI、 PCK 频点、 PLMN标识) 等信息。
由于快速切换是由于小区的切换策略或切换参数设置不正确导致的, 因 此问题的解决也应当还是由导致快速切换发生的小区来进行参数调节来完 成。 因此, 本发明实施例中, 在按上述快速切换的发现方法确定用户设备在 小区发生快速切换、 并通知导致快速切换发生的小区后, 可以由导致快速切 换发生的小区减小用户设备再切换至发生快速切换的小区的概率。 从而解决 快速切换问题; 与现有技术中依靠人工进行快速快换问题的解决相比, 可以 节省人力、 降低网络维护成本。
一个实施例中, 可以由导致快速切换发生的小区通过调节本小区的切换 参数, 如 Hys (迟滞)、 CIO (Cell Individual Offset, 小区个性偏移) 等, 减 小用户设备再切换至发生快速切换的小区的概率。 例如在图 2所示的场景中 可以通过调节切换参数使从小区 A到小区 B的切换变得困难,而使得从小区 A到小区 C的切换变得容易, 以增大 A->C的切换概率, 并降低 A->B的切 换概率。
在另一个实施例中, 也可以由导致快速切换发生的小区通过修改本小区 的切换判决算法, 减小用户设备再切换至发生快速切换的小区的概率。 该实 施例中, 不需要调整任何的切换参数, 而只需要将导致快速切换发生的小区 的切换判决算法进行相应修改,例如在图 2所示的场景中修改小区 A的切换 判决算法使得更倾向于向小区 C切换, 而不向小区 B切换。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤 是可以通过程序来指令相关的硬件完成, 所述的程序可以存储于一计算机可 读取存储介质中, 该程序在执行时, 可以包括上述实施例方法中的全部或部 分步骤, 所述的存储介质可以包括: ROM、 RAM, 磁盘、 光盘等。
本发明实施例中还提供了一种快速切换的发现装置, 如下面的实施例所 述。 由于该装置解决问题的原理与快速切换的发现方法相似, 因此该装置的 实施可以参见方法的实施, 重复之处不再赘述。
如图 12所示, 本发明实施例中的快速切换的发现装置可以包括: 第一确定模块 1201, 用于确定用户设备在小区停留的时间是否超过阈 值;
第二确定模块 1202,用于在所述第一确定模块确定用户设备在小区停留 的时间超过阈值时, 确定所述用户设备在所述小区未发生快速切换; 在所述 第一确定模块确定用户设备在小区停留的时间未超过阈值时, 确定所述用户 设备在所述小区发生快速切换。
如图 13所示, 一个实施例中, 第一确定模块 1201可以包括如下模块之 一或任意组合:
第一确定单元 1301, 用于检测所述用户设备接入所述小区的时刻、 离开 所述小区的时刻,计算二者之差,确定所述用户设备在所述小区停留的时间, 通过将该时间与阈值进行比较, 确定所述用户设备在所述小区停留的时间是 否超过阈值;
第二确定单元 1302, 用于在所述用户设备接入所述小区时启动定时器, 在所述用户设备离开所述小区时通过判断所述定时器是否超时, 确定所述用 户设备在所述小区停留的时间是否超过阈值;
第三确定单元 1303, 用于获取所述用户设备的历史信息; 从所述用户设 备的历史信息中提取所述时间, 通过将该时间与阈值进行比较, 确定所述用 户设备在所述小区停留的时间是否超过阈值。
如图 14所示, 一个实施例中, 图 12所示的发现装置还可以包括: 通知模块 1401, 用于在第二确定模块 1202确定用户设备在小区发生快 速切换后, 通知导致快速切换发生的小区。
如图 15所示, 一个实施例中, 通知模块 1401可以包括:
第一通知单元 1501,用于触发用户设备的切换路径上相邻的发生快速切 换的小区中最后一个小区的后一个小区, 向所述相邻的发生快速切换的小区 中第一个小区的前一个小区发送通知消息;
或, 第二通知单元 1502, 用于触发所述最后一个小区的后一个小区, 将 通知消息经由前面的每一个小区, 转发给所述第一个小区的前一个小区; 或, 第三通知单元 1503, 用于触发所述相邻的发生快速切换的小区中最 后一个小区的后面第二个小区, 向所述第一个小区的前一个小区发送通知消 或, 第四通知单元 1504, 用于触发所述相邻的发生快速切换的小区中最 后一个小区的后面第二个小区, 将通知消息经由前面的每一个小区, 转发给 所述第一个小区的前一个小区。
如图 16所示, 一个实施例中, 通知模块 1401可以包括:
第五通知单元 1601,用于触发所述用户设备的切换路径上每一个发生快 速切换的小区向该发生快速切换的小区的前一个小区发送通知消息;
或, 第六通知单元 1602, 用于对所述每一个发生快速切换的小区, 触发 发生快速切换的小区的后一个小区向该发生快速切换的小区的前一个小区发 送通知消息;
或, 第七通知单元 1603, 用于对所述每一个发生快速切换的小区, 触发 发生快速切换的小区的后一个小区将通知消息经由该发生快速切换的小区转 发给该发生快速切换的小区的前一个小区。
如图 17所示, 一个实施例中, 图 14所示的快速切换的发现装置还可以 包括:
切换控制模块 1701, 用于在通知模块 1401通知导致快速切换发生的小 区后, 触发导致快速切换发生的小区减小用户设备再切换至发生快速切换的 小区的概率。
如图 18所示, 一个实施例中, 切换控制模块 1701可以包括:
第一切换控制单元 1801,用于触发导致快速切换发生的小区通过调节本 小区的切换参数, 减小用户设备再切换至发生快速切换的小区的概率;
或, 第二切换控制单元 1802, 用于触发导致快速切换发生的小区通过修 改本小区的切换判决算法, 减小用户设备再切换至发生快速切换的小区的概 。 本发明实施例中,确定用户设备在小区停留的时间是否超过阈值;若是, 则确定所述用户设备在所述小区未发生快速切换; 若否, 则确定所述用户设 备在所述小区发生快速切换, 从而自动发现快速切换问题;
在按上述方法发现快速切换问题之后, 通知导致快速切换发生的小区, 自动实现快速切换问题通知;
在按上述方法发现快速切换问题以及进行了通知之后, 由导致快速切换 发生的小区减小用户设备再切换至发生快速切换的小区的概率, 从而解决快 速切换问题;
本发明的上述实施例与现有技术中依靠人工进行快速快换问题的发现、 通知和解决相比, 可以节省人力、 降低网络维护成本。
以上所述的具体实施例, 对本发明的目的、 技术方案和有益效果进行了 进一步详细说明, 所应理解的是, 以上所述仅为本发明的具体实施例而已, 并不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、 一种快速切换的发现方法, 其特征在于, 该方法包括:
确定用户设备在小区停留的时间是否超过阈值;
若是, 则确定所述用户设备在所述小区未发生快速切换;
若否, 则确定所述用户设备在所述小区发生快速切换。
2、如权利要求 1所述的方法, 其特征在于,所述确定用户设备在小区停 留的时间是否超过阈值, 包括如下方式其中之一或任意组合:
检测所述用户设备接入所述小区的时刻、 离开所述小区的时刻, 计算二 者之差, 确定所述用户设备在所述小区停留的时间, 通过将该时间与阈值进 行比较, 确定所述用户设备在所述小区停留的时间是否超过阈值;
在所述用户设备接入所述小区时启动定时器, 在所述用户设备离开所述 小区时通过判断所述定时器是否超时, 确定所述用户设备在所述小区停留的 时间是否超过阈值;
获取所述用户设备的历史信息; 从所述用户设备的历史信息中提取所述 时间, 通过将该时间与阈值进行比较, 确定所述用户设备在所述小区停留的 时间是否超过阈值。
3、如权利要求 2所述的方法,其特征在于,所述阈值、定时器值由运行、 管理和维护 OAM、 移动管理实体 MME、 或基站 eNB预先配置。
4、如权利要求 1或 2所述的方法, 其特征在于,在确定用户设备在小区 发生快速切换后, 通知导致快速切换发生的小区。
5、如权利要求 4所述的方法, 其特征在于,若用户设备在至少一个小区 发生快速切换; 则导致快速切换发生的小区为:
所述用户设备的切换路径上相邻的发生快速切换的小区中第一个小区的 前一个小区;
或, 所述用户设备的切换路径上每一个发生快速切换的小区的前一个小 区。
6、如权利要求 5所述的方法, 其特征在于,若导致快速切换发生的小区 为: 所述用户设备的切换路径上相邻的发生快速切换的小区中第一个小区的 前一个小区, 则所述通知导致快速切换发生的小区包括:
由所述相邻的发生快速切换的小区中最后一个小区的后一个小区, 向所 述第一个小区的前一个小区发送通知消息;
或, 由所述最后一个小区的后一个小区, 将通知消息经由前面的每一个 小区, 转发给所述第一个小区的前一个小区;
或, 由所述相邻的发生快速切换的小区中最后一个小区的后面第二个小 区, 向所述第一个小区的前一个小区发送通知消息;
或, 由所述相邻的发生快速切换的小区中最后一个小区的后面第二个小 区, 将通知消息经由前面的每一个小区, 转发给所述第一个小区的前一个小 区。
7、如权利要求 5所述的方法, 其特征在于,若导致快速切换发生的小区 为: 所述用户设备的切换路径上每一个发生快速切换的小区的前一个小区, 则所述通知导致快速切换发生的小区包括:
由所述每一个发生快速切换的小区向该发生快速切换的小区的前一个小 区发送通知消息;
或, 对所述每一个发生快速切换的小区, 由该发生快速切换的小区的后 一个小区向该发生快速切换的小区的前一个小区发送通知消息;
或, 对所述每一个发生快速切换的小区, 由该发生快速切换的小区的后 一个小区将通知消息经由该发生快速切换的小区转发给该发生快速切换的小 区的前一个小区。
8、如权利要求 4所述的方法, 其特征在于,在通知导致快速切换发生的 小区时, 发送的通知消息包括原因值、 导致快速切换发生的小区的标识、 中 转小区的小区标识、 用户设备在发生快速切换的小区中停留的时间、 该通知 消息的转发目的小区信息其中之一或任意组合。
9、如权利要求 4所述的方法, 其特征在于,在通知导致快速切换发生的 小区后, 由导致快速切换发生的小区减小用户设备再切换至发生快速切换的 小区的概率。
10、 如权利要求 9所述的方法, 其特征在于, 由导致快速切换发生的小 区通过调节本小区的切换参数, 或修改本小区的切换判决算法, 减小用户设 备再切换至发生快速切换的小区的概率。
11、 一种快速切换的发现装置, 其特征在于, 包括:
第一确定模块, 用于确定用户设备在小区停留的时间是否超过阈值; 第二确定模块, 用于在所述第一确定模块确定用户设备在小区停留的时 间超过阈值时, 确定所述用户设备在所述小区未发生快速切换; 在所述第一 确定模块确定用户设备在小区停留的时间未超过阈值时, 确定所述用户设备 在所述小区发生快速切换。
12、如权利要求 11所示的装置, 其特征在于, 所述第一确定模块包括如 下模块之一或任意组合:
第一确定单元, 用于检测所述用户设备接入所述小区的时刻、 离开所述 小区的时刻, 计算二者之差, 确定所述用户设备在所述小区停留的时间, 通 过将该时间与阈值进行比较, 确定所述用户设备在所述小区停留的时间是否 超过阈值;
第二确定单元, 用于在所述用户设备接入所述小区时启动定时器, 在所 述用户设备离开所述小区时通过判断所述定时器是否超时, 确定所述用户设 备在所述小区停留的时间是否超过阈值;
第三确定单元, 用于获取所述用户设备的历史信息; 从所述用户设备的 历史信息中提取所述时间, 通过将该时间与阈值进行比较, 确定所述用户设 备在所述小区停留的时间是否超过阈值。
13、 如权利要求 11或 12所示的装置, 其特征在于, 还包括: 通知模块, 用于在所述第二确定模块确定用户设备在小区发生快速切换 后, 通知导致快速切换发生的小区。
14、 如权利要求 13所述的装置, 其特征在于, 所述通知模块包括: 第一通知单元, 用于触发用户设备的切换路径上相邻的发生快速切换的 小区中最后一个小区的后一个小区, 向所述相邻的发生快速切换的小区中第 一个小区的前一个小区发送通知消息;
或, 第二通知单元, 用于触发所述最后一个小区的后一个小区, 将通知 消息经由前面的每一个小区, 转发给所述第一个小区的前一个小区;
或, 第三通知单元, 用于触发所述相邻的发生快速切换的小区中最后一 个小区的后面第二个小区, 向所述第一个小区的前一个小区发送通知消息; 或, 第四通知单元, 用于触发所述相邻的发生快速切换的小区中最后一 个小区的后面第二个小区, 将通知消息经由前面的每一个小区, 转发给所述 第一个小区的前一个小区。
15、 如权利要求 13所述的装置, 其特征在于, 所述通知模块包括: 第五通知单元, 用于触发所述用户设备的切换路径上每一个发生快速切 换的小区向该发生快速切换的小区的前一个小区发送通知消息;
或, 第六通知单元, 用于对所述每一个发生快速切换的小区, 触发发生 快速切换的小区的后一个小区向该发生快速切换的小区的前一个小区发送通 知消息;
或, 第七通知单元, 用于对所述每一个发生快速切换的小区, 触发发生 快速切换的小区的后一个小区将通知消息经由该发生快速切换的小区转发给 该发生快速切换的小区的前一个小区。
16、 如权利要求 13所述的装置, 其特征在于, 还包括:
切换控制模块, 用于在所述通知模块通知导致快速切换发生的小区后, 触发导致快速切换发生的小区减小用户设备再切换至发生快速切换的小区的 概率。
17、 如权利要求 16所述的装置, 其特征在于, 所述切换控制模块包括: 第一切换控制单元, 用于触发导致快速切换发生的小区通过调节本小区 的切换参数, 减小用户设备再切换至发生快速切换的小区的概率;
或, 第二切换控制单元, 用于触发导致快速切换发生的小区通过修改本 小区的切换判决算法, 减小用户设备再切换至发生快速切换的小区的概率。
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