WO2010124461A1

WO2010124461A1 - Discovery method and apparatus of fast handover

Info

Publication number: WO2010124461A1
Application number: PCT/CN2009/071569
Authority: WO
Inventors: 王君; 杨学君
Original assignee: 华为技术有限公司
Priority date: 2009-04-29
Filing date: 2009-04-29
Publication date: 2010-11-04

Abstract

A discovery method of fast handover includes: determining whether the stay time of the user equipment in a cell exceeds the threshold (101); if so, determining that the user equipment does not make a fast handover in the cell (102); if not, determining that the user equipment makes a fast handover in the cell (103). A discovery apparatus of fast handover is also provided. The manpower can be saved, and the cost of the network maintenance can be reduced by applying the present invention.

Description

Fast switching discovery method and device

Technical field

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.

From a commercial operation perspective, operators require lower network and operating costs to provide customers with lower-cost network services to win the market. The key factors to reduce the price of network construction are to improve spectrum utilization, simplify network structure, provide lower cost wireless base stations, and enhance maintainability. To this end, NGMN (next generation mobile networks) has proposed a need for SON (Self Optimized Network) in its white paper.

One of the sub-topics in SON's research is to study mobility optimization. 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.

In order to reduce handover and save resources, it is expected that the normal handover in the above scenario should be from cell A. Switch directly to cell C. In addition, 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.

In the prior art, in order to solve the problem of avoiding the above-mentioned fast handover, 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 inventors have found that the above prior art has the following disadvantages:

The discovery, notification, and troubleshooting of problems based on experience will cost a lot of manpower and network maintenance costs. Summary of the invention

The embodiment of the invention provides a fast handover discovery method, which saves manpower and reduces network maintenance costs. The method includes:

Determining 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 no, it is determined that the user equipment performs fast handover in the cell.

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; and 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. 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 performs fast handover in the cell.

In the embodiment of the present invention, 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 that the user equipment performs fast handover in the cell, thereby automatically discovering a fast handover problem; thereby facilitating subsequent notification and resolution of the fast handover problem. Compared with the prior art discovery that relies on manual quick change, it can save manpower and reduce network maintenance costs. DRAWINGS

The drawings described herein are provided to provide a further understanding of the invention and are in no way of limitation. In the drawing:

1 is a flowchart of a method for discovering fast handover according to an embodiment of the present invention;

2 and FIG. 3 are schematic diagrams showing a discovery mechanism in an embodiment of the present invention;

4, 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;

11 is a schematic diagram of a notification mechanism in an embodiment of the present invention;

12, FIG. 14, and FIG. 17 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;

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 embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. The illustrative embodiments of the present invention and the description thereof are intended to be illustrative of the invention, and are not intended to limit the invention.

As shown in FIG. 1 , in the embodiment of the present invention, 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 implementation of the step 101 may be performed in multiple embodiments. In an embodiment, 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. For example, in this example, when detecting the time when the user equipment accesses the cell and the time when the user leaves the cell, the processing flow may be as follows:

Recording a time when the user equipment accesses the cell;

Recording a moment when the user equipment leaves the cell;

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.

B ^ ⁷ time point the user equipment leaves the cell and the time point B ^ ⁷ and calculates the time of the user equipment in the cell B stays:

ST _B = T _B -T , and ^ i is compared with a threshold (for example, 2 s). If the dwell time is less than the threshold, it is considered that a fast handover has occurred; otherwise, no fast handover is considered to have occurred. In the implementation, 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.

In this example, when specifically discovering the problem of fast switching, OAM (Operations,

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.

In another embodiment, the implementation of 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:

Presetting a timer value;

The timer is started when the user equipment accesses the cell;

Determining whether the timer expires when the user equipment leaves the cell;

If the timeout expires, 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.

The scenario of FIG. 2 is taken as an example. When the discovery of the fast handover problem is specifically implemented in this embodiment, 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.

In another embodiment, the implementation of 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 (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. A specific example will be given below to illustrate the discovery mechanism of the fast handover problem in this embodiment. In this example, the first cell is cell A, the second cell is cell B, and the third cell is cell C.

As shown in the schematic diagram of the discovery mechanism, 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.

C (the stay time in cell B is ^), and then terminate the service in cell C (the stop time in cell C is .

From the perspective of the cell C, 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.

Table 1 UE History Information displayed in cell C

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.

In this example, when the discovery of the fast handover problem is specifically implemented, 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.

In the embodiment of the present invention, after determining, according to the foregoing fast handover discovery method, the user equipment may notify the cell that causes the fast handover to occur after the fast handover occurs in the cell. Thereby, 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.

If the user equipment performs fast handover in at least one cell, 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.

An example of the fast handover notification mechanism in this embodiment will be described in detail below.

In this example, the user device's switching history is: A -> B (Rapid HO) -> C (Rapid HO) -> D-> E. In this scenario, 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.

If the previous cell of the first cell in the fast-switching cell adjacent to the handover path of the user equipment causes fast handover, the notification mechanism may be implemented in multiple ways:

For example, 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. As shown in FIG. 4, in this example, if 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.

For another example, 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. . As shown in FIG. 5, in this example, if the adjacent fast-switching cells are cells 8 and C, 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. 4, 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.

For another example, 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. As shown in Figure 6, in this example, if the adjacent cells that have fast handover are cells B and C, then 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.

For another example, 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.

If the previous cell of the cell that performs fast handover on the handover path of the user equipment causes fast handover, the notification mechanism may be implemented in multiple manners:

For example, the cell that generates the fast handover may send a notification message to the previous cell of the fast-switching cell. As shown in FIG. 8, in this example, 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; wherein, 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.

For another example, for each of the cells in which the fast handover occurs, the next cell of the fast-switching cell sends a notification message to the previous cell of the fast-switching cell. As shown in FIG. 9, in this example, if 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.

For another example, for each of the cells that have fast handover, 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. As shown in FIG. 10, in this example, if 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, and 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. Of course, an ACK (feedback) 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:

A) the identity of the cell causing the fast handover problem, such as CGI (Cell Global Identifier), PCI (Protocol Control Information), frequency point, PLMN (Public Land Mobile Network) Identification, etc.

B) identification of the transit cell, such as CGI (Cell Global Identifier), PCI (Protocol Control Information), frequency, PLMN (Public Land Mobile Network), etc.

C) Cause, such as "Rapid Handover" or other similar reasons;

D) Stay Time, the time spent in the cell when a fast handover occurs;

E) UE History Information?

If the notification message needs to be forwarded by other cells, 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).

Since the fast handover is caused by the handover policy of the cell or the handover parameter setting is incorrect, the solution of the problem should also be completed by parameter adjustment by the cell causing the fast handover to occur. Therefore, in the embodiment of the present invention, 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.

In an embodiment, 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.

In another embodiment, 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. In this embodiment, it is not necessary to adjust any handover parameters, but only the handover decision algorithm of the cell that causes the fast handover to occur is modified accordingly. For example, in the scenario shown in FIG. 2, the handover decision algorithm of the cell A is modified to make it more inclined. Switching to cell C without switching to cell B.

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.

As shown in FIG. 12, 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.

As shown in FIG. 13, in an embodiment, 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.

As shown in FIG. 14, in an embodiment, 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.

As shown in FIG. 15, in an embodiment, 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;

Or, 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 second cell that is used to trigger the last cell in the adjacent fast-switching cell, and send a notification to the previous cell of the first cell. Or, 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.

As shown in FIG. 16, in an embodiment, 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;

Or, 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;

Or, 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.

As shown in FIG. 17, in an embodiment, 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.

As shown in FIG. 18, in an embodiment, 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;

Or, 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. In the embodiment of the present invention, 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;

After the fast handover problem is found according to the above method, the cell that causes the fast handover to occur is notified, and the fast handover problem notification is automatically implemented;

After the fast handover problem is found and the notification is performed according to the above method, 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;

Compared with the prior art in discovering, notifying, and solving the problem of fast quick change, the above-mentioned embodiments of the present invention can save manpower and reduce network maintenance costs.

The above described specific embodiments of the present invention are further described in detail, and are intended to be illustrative of the embodiments of the present invention. The scope of the protection, any modifications, equivalents, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Claim

A method for discovering fast switching, characterized in that the method comprises:

The method according to claim 1, wherein the determining whether the time that the user equipment is in the cell suspension exceeds a threshold includes one or any combination of the following:

Detecting a time when the user equipment accesses the cell and a time when the cell leaves the cell, calculating a difference between the two, determining a time for the user equipment to stay in the cell, and comparing the time with a threshold to determine Whether the time that the user equipment stays in the cell exceeds a threshold;

When the user equipment accesses the cell, a timer is started, and when the user equipment leaves the cell, it is determined whether the time that the user equipment stays in the cell exceeds a threshold by determining whether the timer expires;

Obtaining the historical information of the user equipment; extracting the time from the historical 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 method according to claim 2, wherein the threshold and timer value are pre-configured by the OAM, the mobility management entity MME, or the base station eNB.

The method according to claim 1 or 2, characterized in that after determining that the user equipment has a fast handover in the cell, the cell causing the fast handover to occur is notified.

The method according to claim 4, wherein if the user equipment rapidly switches in at least one cell, the cell that causes the fast handover to occur is:

a previous cell of the first cell in the cell in which the fast handover occurs adjacent to the handover path of the user equipment;

Or, the previous cell of the cell in which the fast handover is performed on each of the handover paths of the user equipment.

The method according to claim 5, wherein the cell that causes the fast handover to occur is: the previous cell of the first cell in the adjacent fast-switching cell on the handover path of the user equipment, Then, the cell that causes the fast handover to occur includes:

And transmitting, by the neighboring cell of the last cell of the adjacent fast-switching cell, a notification message to a previous cell of the first cell;

Or, the notification message is forwarded to the previous cell of the first cell by using each of the preceding cells by the next cell of the last cell;

Or sending a notification message to the previous cell of the first cell by the second cell behind the last cell in the adjacent fast-switching cell;

Or, the notification message is forwarded to the previous cell of the first cell by each of the preceding cells by the second cell behind the last cell in the adjacent fast-switching cell.

The method according to claim 5, wherein if the cell causing the fast handover occurs is: the previous cell of the cell in which the fast handover occurs on the handover path of the user equipment, the notification causes a fast The cell in which the handover occurs includes:

Sending, by each of the cells in which the fast handover occurs, a notification message to a previous cell of the fast-switching cell;

Or, for each of the cells in which the fast handover occurs, the next cell of the fast-switching cell sends a notification message to the previous cell of the fast-switching cell;

Or, for each of the cells in which the fast handover occurs, 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 method according to claim 4, wherein when the cell that causes the fast handover to occur is notified, the sent notification message includes a cause value, an identifier of the cell that causes the fast handover to occur, a cell identifier of the transit cell, and a user equipment. One or any combination of the time spent in the cell in which the fast handover occurs, the forwarding destination cell information of the notification message.

The method according to claim 4, characterized in that after the cell causing the fast handover to occur is notified, the probability that the user equipment is switched to the cell in which the fast handover occurs is caused by the cell causing the fast handover to occur.

The method according to claim 9, wherein the cell that causes the fast handover occurs adjusts the handover parameter of the local cell, or modifies the handover decision algorithm of the local cell, and reduces the user equipment to switch to the fast handover. The probability of the cell.

11. A fast switching discovery device, comprising:

12. The apparatus of claim 11, wherein the first determining module comprises one or any combination of the following modules:

a first determining unit, 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 time Comparing with the threshold, determining whether the time that the user equipment stays in the cell exceeds a threshold;

a second determining unit, configured to start a timer when the user equipment accesses the cell, and determine, by the user equipment, that the timer expires when the user equipment leaves the cell, determining that the user equipment is in the cell Whether the time spent staying exceeds the threshold;

a third determining unit, configured to acquire historical information of the user equipment, extract the time from historical information of the user equipment, and compare the time with a threshold to determine that the user equipment stays in the cell Whether the time exceeds the threshold.

The device of claim 11 or 12, further comprising: a notification module, configured to determine, at the second determining module, that the user equipment quickly switches in the cell After that, the cell that caused the fast handover to occur is notified.

The device according to claim 13, wherein the notification module comprises: a first notification unit, configured to trigger a subsequent one of the last cells in the adjacent fast-switching cell on the handover path of the user equipment a cell, sending a notification message to a previous cell of the first cell in the adjacent fast-switching cell;

Or the second notification unit 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 a third notification unit, configured to trigger a second cell that is behind the last cell in the adjacent fast-switching cell, and send a notification message to the previous cell of the first cell; or, fourth And a notification unit, 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 previous cell of the first cell by using each of the preceding cells.

The device according to claim 13, wherein the notification module comprises: a fifth notification unit, configured to trigger a cell that performs fast handover on each of the handover paths of the user equipment to the fast handover The previous cell of the cell sends a notification message;

Or a sixth notification unit, configured to send a notification message to the previous cell of the cell in which the fast handover occurs, to the cell in which the fast handover occurs;

Or a seventh notification unit, 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 cell in which the fast handover occurs before the fast handover cell a community.

The device of claim 13, further comprising:

And a handover control module, configured to: after the notification module notifies the cell that causes the fast handover to occur, trigger 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 device of claim 16, wherein the switching control module comprises: a first handover control unit, configured to trigger a cell that causes a fast handover to occur, by adjusting a handover parameter of the local cell, and reducing a probability that the user equipment switches to a cell in which fast handover occurs;

Or, the second handover control unit is configured to trigger a cell that causes the fast handover to occur, by modifying a handover decision algorithm of the local cell, and reducing a probability that the user equipment switches to the cell in which the fast handover occurs.