CN101179815A - Mobile switching center pool fault handling method, device and system - Google Patents

Abstract

The embodiment of the present invention relates to a mobile switching center pool fault processing method, comprising: a fault processing device obtains information that a faulty MSC or MSC server in the mobile switching center pool fails; The terminal sends a location information request message; the access control device forwards the response message of the mobile terminal to the location information request message to the effective MSC or effective MSC server in the mobile switching center pool, triggers the effective MSC or the MSC server to perform location update, and sends the mobile terminal Switch to a valid MSC or MSC server in the mobile switching center pool. The invention also provides an MSC pool fault processing system and a fault processing device. The invention realizes that the mobile terminal belonging to the faulty MSC or MSC server can be distributed to other normal working MSC/MSC servers in time for normal calling.

Description

Mobile switching center pool fault handling method, device and system

technical field

Embodiments of the present invention relate to mobile communication technologies in the field of communication, and in particular to a method, device and system for handling faults in a mobile switching center (Mobile Switch Center, MSC for short) pool.

Background technique

As shown in Figure 1, it is a schematic structural diagram of a mobile communication system based on an MSC pool in the prior art. The MSC access control device is used in the Global System for Mobile Communication (Global System for Mobile Communication, GSM for short) and Code Division Multiple In a Code Division Multiple Access (CDMA) system, the access control device is a base station controller (Base Station Control, abbreviated as BSC); in a Wideband Code Division Multiple Access (WCDMA) , Wideband Code Division Multiple Access, WCDMA for short) system, the access control device is a radio network controller (Radio Network Controller, radio network controller, RNC for short). For ease of description, the BSC and the RNC are collectively referred to as access control devices in this document. In this structure, not only one MSC can connect to multiple BSCs/RNCs, but also one BSC/RNC can also connect to multiple MSCs. These MSCs form an MSC pool for the BSC/RNC. Each MSC in the MSC pool adopts different The signaling point is connected with BSC/RNC. For services initiated by a mobile terminal (Mobile Station, MS for short), after receiving the message from the mobile terminal, the BSC/RNC distributes the service to each MSC according to the load sharing principle. When an MSC fails, the service is distributed to other MSCs. Backup MSC processing to realize redundant backup between MSCs.

As shown in Figure 2, it is a schematic structural diagram of a mobile communication system under the framework of separation of signaling and bearer in the prior art. In this structure, the signaling of BSC/RNC is transferred through a media gateway (Media Gateway, MGW for short). , MGW uses virtual MGW technology, each virtual MGW is connected to one MSC server, and one BSC/RNC can connect to one or more MGWs, so that BSC/RNC communicates with multiple MSC servers, and each MSC server uses the same signaling point and multiple BSC/RNC interaction, in FIG. 2 , the first MSC server and the second MSC server interact with the first BSC/RNC and the second BSC/RNC through the first MGW through the same signaling point. The service initiated by the mobile terminal is distributed to a certain MGW by the BSC/RNC according to the principle of load sharing. (Temporary Mobile Identity, TMSI for short) code and the corresponding relationship between the IMSI or TMSI stored in the MGW and the MSC server distributes the service to the corresponding MSC server to realize the load sharing of all services among the MSC servers. When an MSC server fails , the business is assigned to its backup MSC server for processing, realizing redundant backup between MSC servers.

In the above-mentioned two kinds of mobile communication system structures, if a certain MSC/MSC server in the MSC pool, such as the first MSC/first MSC server breaks down, when the calling side sends the home location register (Home Location Register) of the user , be called for short HLR) when sending location request (LocationRequest, be called for short LOCREQ) information, HLR sends routing request (Routing Request, be called for short ROUTREQ) information to the belonging first MSC/first MSC server of mobile phone, obtain roaming number, because first MSC/ The first MSC server fails, so the roaming number cannot be obtained, and the mobile phone user can only be called again when the mobile phone user is distributed to other normal working MSC/MSC servers until the mobile phone performs location registration again. The longest duration is the periodical location duration, which is generally about one hour. During this hour, the user cannot be called. That is to say, in the prior art, users under the failed MSC cannot be distributed to other MSC/MSC servers that work normally in time, so before they are assigned to other MSC/MSC servers that work normally, the original belonging When the user terminal under the faulty MSC is called, the call will fail.

Contents of the invention

The embodiment of the present invention provides a mobile switching center pool fault handling method, device and system, so that when a certain MSC/MSC server in the mobile switching center pool fails, the users under the faulty MSC can be distributed to other normal working users in time. Make normal calls under the MSC/MSC server.

The embodiment of the present invention provides a method for handling faults in a mobile switching center pool, including:

The failure processing device obtains the failure information of the failure mobile switching center or the failure of the mobile switching center server in the mobile switching center pool;

The fault processing device sends a location information request message to the mobile terminal currently belonging to the faulty mobile switching center or mobile switching center server;

The access control device forwards a response message of the mobile terminal to the location information request message to an active mobile switching center or an active mobile switching center server in the mobile switching center pool, for triggering the active mobile switching center or active mobile switching center The MSC server updates the location according to the response message of the location information request message, and switches the mobile terminal to an active MSC or an active MSC server in the MSC pool.

The embodiment of the present invention also provides a fault processing device, including:

A failure information acquisition unit, configured to acquire failure information of a failure mobile switching center or mobile switching center server in the mobile switching center pool;

The location information request message initiating unit is configured to, after the fault information obtaining unit obtains the information that the faulty mobile switching center or mobile switching center server in the mobile switching center pool fails, send a message to the mobile switching center currently belonging to the mobile switching center or The mobile terminal of the mobile switching center server sends a location information request message, wherein the location information request message includes a paging message and a notification message for performing location registration.

The embodiment of the present invention also provides a fault processing system, including:

at least one fault handling device, at least one access control device, and at least one active mobile switching center or active mobile switching center server;

The failure processing device is used to obtain the failure information of the failure mobile switching center or mobile switching center server in the mobile switching center pool, and send a location information request to the mobile terminal currently belonging to the failure mobile switching center or mobile switching center server information;

The access control device is configured to receive a response message to the location information request message sent by the mobile terminal, and forward the response message to the location information request message according to a load sharing principle;

The active mobile switching center or the active mobile switching center server is configured to receive the response message of the location information request message forwarded by the access control device, update the location according to the response message of the location information request message, and update the mobile The terminal switches to an active MSC or an active MSC server in the MSC pool.

In the embodiment of the present invention, when a certain MSC or MSC server in the MSC pool fails, the backup MSC that backs up the data of the faulty MSC or the MGW that backs up the data of the faulty MSC server actively requests the mobile terminal to perform location registration, so that the mobile terminal belongs to the faulty MSC. Or the terminals of the MSC server can be distributed to other normal working MSC/MSC servers in time for normal calls.

Description of drawings

Fig. 1 is the prior art mobile communication system structural representation based on MSC pool;

FIG. 2 is a schematic structural diagram of a mobile communication system under the framework of separation of signaling and bearer in the prior art;

Fig. 3 is a flow chart of Embodiment 1 of the mobile switching center pool fault handling method of the present invention;

FIG. 4 is a flow chart of Embodiment 2 of the mobile switching center pool fault handling method of the present invention;

5 is a flow chart of Embodiment 3 of the mobile switching center pool fault handling method of the present invention;

6 is a schematic diagram of an analysis of a notification message for location registration sent by an active mobile switching center to a mobile terminal belonging to a faulty mobile switching center in the mobile switching center pool fault handling method of the present invention;

Fig. 7 is the flow chart of the method for the backup MSC in Fig. 3 of the present invention to send location information request messages to all mobile terminals belonging to the faulty MSC;

FIG. 8 is a flow chart of Embodiment 4 of the mobile switching center pool fault handling method of the present invention;

FIG. 9 is a flow chart of Embodiment 5 of the mobile switching center pool fault handling method of the present invention;

FIG. 10 is a structural diagram of Embodiment 1 of a mobile switching center pool failure processing device according to the present invention;

FIG. 11 is a structural schematic diagram of Embodiment 1 of the mobile switching center pool fault handling system of the present invention;

FIG. 12 is a schematic structural diagram of Embodiment 2 of the mobile switching center pool fault handling system of the present invention.

Detailed ways

The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

Fig. 3 shows the flow chart of Embodiment 1 of the mobile switching center pool failure processing method of the present invention, specifically comprising:

Step 11, the backup MSC obtains the failure information of the failure MSC. In the MSC pool, the failed MSC is called the failed MSC, and the MSC that backs up the VLR data of the failed MSC is called the backup MSC. The backup MSC can learn the failure information of the failed MSC according to the status of the backup channel and signaling point.

Step 12, the backup MSC initiates a location information request message to all mobile terminals belonging to the faulty MSC. Since the backup MSC has backed up the VLR data of the faulty MSC, it can know the location area cells to which all mobile terminals belonging to the faulty MSC belong, and can send location information request messages to all mobile terminals belonging to the faulty MSC. The location information request message is used to trigger all mobile terminals belonging to the faulty MSC to report their own location information to the network side, so that the network side equipment performs location registration/update.

Step 13, the BSC/RNC sends the response messages to the location information request message of all mobile terminals belonging to the faulty MSC to the active MSCs in the MSC pool. The BSC/RNC sends the response messages to the location information request message of all mobile terminals belonging to the faulty MSC to the valid MSCs in the MSC pool according to the load sharing principle.

Step 14, the effective MSC receives the mobile terminal's response message to the location information request message, performs location update according to the response message of the location information request message, and updates the home MSC recorded in the home location register of the mobile terminal to the effectively move the switching center, and acquire the mobile terminal information from the location home register. After the mobile terminal belonging to the original faulty MSC updates the location of the valid MSC, the call information sent to the original faulty MSC will be directly sent to the valid MSC, and the mobile terminal can be called normally.

Embodiment 1 of the present invention When a certain MSC in the MSC pool fails, by actively sending a location information request message to a mobile terminal belonging to the faulty MSC, and sending a response message of the mobile terminal to the location information request message to On the effective mobile switching center, the active mobile switching center is triggered to update the location of the mobile terminals under the failed mobile switching center, so that the mobile terminals under the failed mobile switching center are allocated to other effective mobile switching centers in time. Instead of passively waiting for the mobile terminal of the user to register its location, the response message of the mobile terminal is distributed to the active MSC in the MSC pool, thereby solving the problem that the user terminal belonging to the faulty MSC cannot be called within a certain period of time.

Fig. 4 shows the flow chart of Embodiment 2 of the mobile switching center pool fault handling method of the present invention. For the mobile communication system structure as shown in Fig. 1, the fault handling can be realized by the method shown in Fig. 4 , this implementation Example 2 specifically includes the following steps:

Step 21, the backup MSC obtains the failure information of the failure MSC. Because there is a VLR data backup relationship between MSCs, the backup MSC backs up the VLR data of the faulty MSC, and the backup MSC can learn the failure information of the faulty MSC according to the backup channel and the status of the signaling point.

Step 22, the backup MSC initiates a paging message to all mobile terminals belonging to the faulty MSC. Since the backup MSC has backed up the VLR data of the faulty MSC, the location area cells to which all mobile terminals belonging to the faulty MSC belong can be known, and paging messages can be sent to all mobile terminals belonging to the faulty MSC one by one.

Step 23: The BSC/RNC sends the paging response messages that all mobile terminals belonging to the faulty MSC respond to the paging message to the valid MSCs in the MSC pool. The BSC/RNC sends the paging response messages of all mobile terminals belonging to the faulty MSC to the active MSCs in the MSC pool according to the load sharing principle.

Step 24, the effective MSC receives the paging response message of the mobile terminal, performs location update according to the paging response message, and updates the home MSC recorded in the home location register of the mobile terminal to the effective mobile switching center, and from Obtain the mobile terminal information from the location attribution register. After the mobile terminal belonging to the original faulty MSC updates the location of the valid MSC, the call information sent to the original faulty MSC will be directly sent to the valid MSC, and the mobile terminal can be called normally.

As shown in Fig. 5, it is the flow chart of embodiment three of the mobile switching center pool fault handling method of the present invention, for Code Division Multiple Access (Code Division Multiple Access, referred to as CDMA) 2000 network, can use the method as shown in Fig. 5 to realize fault Processing, this implementation three specifically includes the following steps:

Step 31, the backup MSC obtains the failure information of the failure MSC.

Step 32, the backup MSC sends a notification message for location registration to all mobile terminals belonging to the faulty MSC;

Step 33: The BSC receives the location registration message initiated by the mobile terminal according to the location registration notification message, and sends the location registration message to an active MSC in the MSC pool according to the load sharing principle.

Step 34, the effective MSC receives the location registration message of the mobile terminal, performs location update according to the location registration message, updates the home MSC recorded in the home location register of the mobile terminal to the effective mobile switching center, and transfers from the Obtain the mobile terminal information from the location attribution register. After the mobile terminal belonging to the original faulty MSC updates the location of the valid MSC, the call information sent to the original faulty MSC will be directly sent to the valid MSC, and the mobile terminal can be called normally.

Fig. 6 shows the analytical schematic diagram of the notification message for location registration sent by the active mobile switching center to the mobile terminal belonging to the faulty mobile switching center in the mobile switching center pool failure processing method of the present invention. As shown in Fig. (Base Station, base station, referred to as BS) sends a registration request (Registration Request), the mobile terminal receives the registration request order (Registration Request Order) from the BS, and then sends the registration information (Registration Message) to the BS, and the BS sends the location to the effective MSC Update request (Location Updating Request), MSC will register the location information of the mobile terminal after receiving the location update request, and then send Location Updating Accept (Location Updating Accept) information to BS, BS will register and accept the order (Registration Accepted Order) Sent to the mobile terminal, the mobile terminal completes the location update registration with the valid MSC. In Figure 6, the registration request sent by the effective MSC to the base station can be regarded as a request message notifying the mobile terminal to perform location registration, and the location update request sent by the base station to the effective MSC can be regarded as the mobile terminal responding to the registration request. location registration request message.

Fig. 7 shows the flow chart of the method for the backup MSC in Fig. 3 of the present invention to send location information request messages to all mobile terminals belonging to the faulty MSC, specifically:

Step 121. First, the cell is used as the sending range of the location request message, and the location information request message for the mobile terminal is sent in batches to the cell where the mobile terminal is currently located in the faulty mobile switching center/mobile switching center server. An implementation manner of sending location information request messages in batches is to send them in batches in units of cells, divide the cell where the mobile terminal is located into different batches, each batch contains at least one cell, and then send the location information in batches The information request message is sent in batches with the cell as the unit, and the specific implementation method will not be repeated here. Those skilled in the art can also think of other similar batch sending methods, which will not be repeated here; Describe whether the mobile terminals belonging to the faulty mobile switching center/mobile switching center server have all received the location information request message, if yes, end; otherwise, perform step 122; send the location information request message to the mobile terminal, if the mobile terminal After receiving the message, the mobile terminal will return a location registration request message. If the location registration request message is received, it can be judged that the mobile terminal has received the location information request message.

Step 122, expand the message sending range, take at least one base station at the periphery of each cell where all mobile terminals belonging to the faulty MSC are located as the sending range of the location information request message, and send all mobile terminals belonging to the faulty MSC that have not received the location information request message The mobile terminal sends a location information request message; judge whether the mobile terminal can receive all the location information request messages, if yes, end; otherwise, execute step 123;

Step 123: Taking the location area of each cell where all mobile terminals belonging to the faulty MSC are located as the paging range, send in batches to all mobile terminals belonging to the faulty MSC that have not received the location information request message in all location areas Location information request message.

The above method of sending location information request messages to all mobile terminals belonging to the faulty MSC in batches and expanding the message sending range can reduce the load impact of a large number of location information request messages on the paging channel of the base station. The backup MSC in Figure 4 above sends paging messages to all mobile terminals belonging to the faulty MSC, and the backup MSC in Figure 5 sends notification messages for location registration to all mobile terminals belonging to the faulty MSC. The method of sending the message range, the specific implementation process will not be repeated. In order to clearly illustrate the effect of sending location information request messages in batches, a call model is first assumed. Generally, one carrier frequency can handle 30 calls at the same time. Assuming that the traffic volume of each user is 0.025Erl, the number of users carried by each carrier frequency is 30/0.025=1200. A carrier frequency is generally a cell. Considering redundancy, calculate with 1000 users in each cell. Assuming that there are 5 MSCs in the MSC pool, about 1000/5=200 users in each cell are handled by one MSC. If one MSC fails, it is necessary to initiate a location information request message to the mobile terminals of the 200 users in each cell. According to the VLR data backed up from the faulty MSC, the location information request message is sent in the cell range, which can be 5 users per second, and the location information request message can be sent to 200 mobile terminals in 40 seconds. Assuming that 50% of the location information request messages sent by the user mobile terminals in the cell range cannot be received, the sending range is expanded and sent again. Retransmit with the 10 base stations around the cell as the new range. Each base station generally has 3 cells, then 10 base stations have 200×3×10=6000 users, 50% is 3000 users. With 5 users per second, location information request messages can be sent to 3000 mobile terminals in 10 minutes. After the above two transmissions, the success rate is relatively high. Assuming that 15% of the users have not received the location information request message, the transmission can be performed according to the location area of the cell to which the faulty MSC belongs. Generally, there are no more than 30 base stations in one location area, so 15% of users are 200×3×30×0.15=2700. With 5 users per second, sending location information request messages to 2700 mobile terminals can be completed in 9 minutes.

The assumed call model in the method of sending location information request messages in batches and expanding the message sending range is a common call model. According to the actual call model and the paging channel carrying capacity of the base station, the batch sending of location information request messages The speed can be adjusted. For example, when it is not busy, the paging channel is relatively idle, and the above speed can be accelerated. For another example, if the traffic volume of users is high, the number of users carried by the base station is small, and the above speed can also be accelerated.

Figure 8 is a flow chart of Embodiment 4 of the mobile switching center pool fault handling method of the present invention. For the mobile communication system structure with separation of signaling and bearer as shown in Figure 2, the method as shown in Figure 8 can be used to solve the problem. To realize fault handling in the MSC pool, Embodiment 4 of the present invention specifically includes the following steps:

Step 41, the MGW connected to the faulty MSC server obtains information that the faulty MSC server has failed. There is an H.248 link between the MGW and the MSC. If the H.248 link fails, the MGW considers that the MSC has failed. A faulty MSC server in the MSC pool is called a faulty MSC server.

Step 42: The MGW storing the location information of the mobile terminals belonging to the faulty MSC server initiates a paging message to all mobile terminals belonging to the faulty MSC server. Since one MSC server is connected to multiple MGWs, as shown in Figure 2, if the first MSC server fails, both the first MGW and the second MGW connected to the first MSC server can learn that the first MSC has failed, A mapping relationship needs to be stored in each MGW, and the mapping relationship stipulates the corresponding relationship between each MGW and the MSC server it is responsible for. For example, the mapping relationship stipulates that the first MGW is responsible for the first All mobile terminals of the MSC server send paging messages, and the second MGW is responsible for sending paging messages to all mobile terminals belonging to the second MSC server when the second MSC server fails. In this way, when the first MSC server fails, only The first MGW can send paging messages to all mobile terminals belonging to the first MSC server, without the possibility that the first MGW and the second MGW send paging messages at the same time or the system cannot determine which MGW sends the paging message Condition. The stipulation of the mapping relationship is not unique, and there are other implementations, as long as it can be determined that when an MSC server fails, an MGW can send a paging message to the mobile terminal of the failed MSC server. Wherein, when the first MSC server fails, the MGW that sends paging messages to all mobile terminals belonging to the failed MSC server is called a backup MGW.

Step 43: The access control device sends the paging response messages of all mobile terminals belonging to the faulty MSC server to the paging message in response to the paging message to the rest of the MGWs in the mobile switching center pool except the backup MGW, and then the MGW sends the paging response to the paging message. The call response message is sent to the valid MSC server in the MSC pool. The paging response message sent by the mobile terminal belonging to the faulty MSC server is received by the BSC/RNC, and then the BSC/RNC distributes the paging response message to the mobile switching center pool other than the backup MGW according to the load sharing principle On the remaining MGWs, the MGW sends the paging response message to an effective MSC server in the MSC pool according to the load sharing principle.

Step 44, the effective MSC server receives the paging response message of the mobile terminal, performs location update according to the paging response message, updates the home MSC server recorded in the home location register of the mobile terminal to the effective MSC server, and Acquiring the mobile terminal information from the location attribution register. After the location of the mobile terminal belonging to the original faulty MSC server is updated by the valid MSC server, the call information sent to the original faulty MSC server will be directly sent to the valid MSC server, and the mobile terminal can be called normally.

Embodiment 4 of the present invention When a certain MSC server in the MSC pool fails, by actively initiating a paging message to the mobile terminal belonging to the faulty MSC server, and sending the mobile terminal to the effective paging response message On the MSC server, the active MSC server is triggered to update the location of the mobile terminal under the failed MSC server, so that the mobile terminal under the failed MSC is allocated to other effective MSC servers in time, instead of passively waiting for the user After the mobile terminal performs location registration, the response message of the mobile terminal is distributed to the effective MSC server in the MSC pool, thereby solving the problem that the user terminal belonging to the faulty MSC server cannot be called within a certain period of time.

As shown in Figure 9, it is the flow chart of Embodiment 5 of the mobile switching center pool fault handling method of the present invention. For the CDMA2000 network, the method shown in Figure 9 can be used to realize the fault handling. This implementation five specifically includes the following steps:

Step 51, the backup MGW connected to the faulty MSC server obtains the failure information of the faulty MSC server;

Step 52, the backup MGW that stores the location information of the mobile terminals belonging to the faulty MSC server initiates a notification message for location registration to all mobile terminals belonging to the faulty MSC server;

Step 53, the BSC sends the location registration messages initiated by all mobile terminals belonging to the faulty MSC server to the MGWs in the mobile switching center pool except the backup MGW according to the location registration notification message, and then the location registration messages except the backup MGW The external MGW sends the location registration message to an effective MSC server in the MSC pool;

Step 54, the effective MSC server receives the location registration message of the mobile terminal, performs location update according to the location registration message, updates the home MSC server recorded in the home location register of the mobile terminal to the effective MSC server, and obtains Obtain the mobile terminal information from the location attribution register. After the location of the mobile terminal belonging to the original faulty MSC server is updated by the valid MSC server, the call information sent to the original faulty MSC server will be directly sent to the valid MSC server, and the mobile terminal can be called normally.

Fig. 10 shows the structural diagram of Embodiment 1 of the mobile switching center pool fault processing device of the present invention, and the device specifically includes: a fault information acquisition unit A01, which is used to obtain the faulty information of the faulty MSC/MSC server in the MSC pool; location information The request message initiating unit A02 is used to send a location information request message to a mobile terminal belonging to the MSC/MSC server after the fault information obtaining unit A01 obtains information that the faulty MSC/MSC server in the MSC pool fails; The VLR data of the faulty MSC/MSC server in the MSC pool is backed up in the fault processing device, so the fault processing device can obtain the information of the fault of the MSC/MSC server through the backup channel, and can know the mobile terminal belonging to the faulty MSC/MSC server information, so the location information request message can be initiated to the mobile terminal belonging to the faulty MSC/MSC server; wherein, the location information request message initiation unit A02 can include: a paging message initiation unit A021, which is used to acquire the fault information Unit A01 sends a paging message to the mobile terminals belonging to the mobile switching center/mobile switching center server after receiving the information that the faulty mobile switching center/mobile switching center server in the mobile switching center pool fails; performs a location registration notification message The initiating unit A022 is used for moving to the mobile switching center/mobile switching center server belonging to the mobile switching center/mobile switching center server after the fault information obtaining unit A01 receives the information that the faulty mobile switching center/mobile switching center server in the mobile switching center pool fails. The terminal sends a notification message for location registration.

As shown in Figure 11, it is a schematic structural diagram of Embodiment 1 of the mobile switching center pool failure processing system of the present invention. Incoming control equipment (BSC/RNC) and a mobile terminal (MS). In the mobile communication system of this embodiment, each mobile switching center (the first mobile switching center (MSC) A2, the second mobile switching center (MSC) A3 and the third mobile switching center (MSC) A4) in the MSC pool A1 Connect with the first access control device (BSC/RNC) A5, the second access control device (BSC/RNC) A6, and the third access control device (BSC/RNC) A7 respectively, and backup in the second mobile switching center A3 There is the VLR data of the first mobile switching center (MSC) A2, when the first mobile switching center (MSC) A2 broke down, the second mobile switching center A3 that has backed up the VLR data of the first mobile switching center (MSC) A2 to All mobile terminals (MS) A10 belonging to the first mobile switching center (MSC) A2 initiate a location information request message, and the mobile terminal (MS) A10 responds to the location information request message, and the third access network in the area where the mobile terminal is located Control equipment (BSC/RNC) A7 sends the response message of the location information request message of mobile terminal (MS) A10 to effective third mobile switching center (MSC) A4 in MSC pool A1, and then the third mobile switching center (MSC) A4 updates the location information of the mobile terminal (MS) A10 in the home location register (HLR), and when the user mobile terminal belonging to the first mobile switching center (MSC) A2 of the failure is subsequently called, the home location register (HLR) will The call information is sent to the third mobile switching center (MSC) A4, and the user's mobile terminal can proceed normally when called. Each access control device (BSC/RNC) covers a certain area, and the response message of the mobile terminal in this area to the location information request is sent by the BSC/RNC to the effective MSC. For the convenience of description, only the The information interaction between the mobile terminal (MS) A10 belonging to the third access control device (BSC/RNC) A7 and the third access control device (BSC/RNC) A7, the other access control devices (BSC/RNC) It is similar to the information exchange method between mobile terminals (MS), and will not be repeated here. The second mobile switching center in the embodiment of the system can realize the function of sending a location information request message to the faulty MSC after detecting the fault of the faulty MSC, and the location information request can be performed by sending a paging message or sending a notification Therefore, the second mobile switching center (MSC) in the embodiment of the system is the fault processing device in the embodiment of the present invention.

Figure 12 is a schematic diagram of Embodiment 2 of the mobile switching center pool fault handling system structure of the present invention. Figure 12 shows the structure of a mobile communication system with separation of signaling and bearer. For ease of description, only three mobile switching centers are shown in Figure 12. Center (MSC) server, 3 media gateways (MGW), one mobile terminal (MS), and five access control devices (BSC/RNC). In the mobile communication system of this embodiment, each mobile switching center server (the first MSC server B1, the second MSC server B2, and the third MSC server B8) in the MSC pool A1 is respectively connected with the first media gateway (MGW) B3, The second media gateway (MGW) B4 and the third media gateway (MGW) B9 are connected, the VLR data of the first MSC server B1 is stored in the first media gateway (MGW) B3, when the first MSC server B1 breaks down, the first MSC server B1 A media gateway (MGW) B3 initiates a location information request message to all mobile terminals (MS) A10 belonging to the first MSC server B1, and the mobile terminal (MS) A10 responds to the location information request message request, because each access The control devices (BSC/RNC) all cover a certain area. After the BSC/RNC to which the mobile terminal belongs receives the response message to the location information request message sent by the mobile terminal, the BSC/RNC distributes the effect message according to the load sharing principle To a certain media gateway (MGW) other than the first media gateway (MGW) in the mobile switching center pool, such as the second media gateway (MGW) B4, then the second media gateway (MGW) B4 will share the message according to the load In principle, it is distributed to an effective MSC server, such as the third MSC server B8, and the third MSC server B8 updates the location information of the mobile terminal (MS) A10 in the home location register (HLR), and subsequently belongs to the faulty first mobile exchange When the user's mobile terminal of the center (MSC) server B1 is called, the home location register (HLR) will send the call information to the third MSC server B8, and the user's mobile terminal can be called normally. The first media gateway (MGW) B3 in the embodiment of this system can realize the function of sending a location information request message to the mobile terminal under the failure MSC after detecting the failure of the failure MSC, and the location information request can be sent by sending a paging message or sending a notification message for location registration, so the first media gateway (MGW) B3 in this system embodiment is the fault handling device in this embodiment of the present invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (19)

1. A mobile switching center pool fault handling method, characterized in that, comprising: The failure processing device obtains the failure information of the failure mobile switching center or the failure of the mobile switching center server in the mobile switching center pool; The fault processing device sends a location information request message to the mobile terminal currently belonging to the faulty mobile switching center or mobile switching center server; The access control device forwards a response message of the mobile terminal to the location information request message to an active mobile switching center or an active mobile switching center server in the mobile switching center pool, for triggering the active mobile switching center or active mobile switching center The MSC server updates the location according to the response message of the location information request message, and switches the mobile terminal to an active MSC or an active MSC server in the MSC pool. 2. The method according to claim 1, wherein the information that the failure processing device obtains in the mobile switching center pool or the information that the mobile switching center server breaks down is specifically: the fault processing device passes through a backup channel And the signaling point status obtains the failure information of the faulty mobile switching center or the mobile switching center server. 3. The method according to claim 1, wherein the failure processing device is a backup mobile switching center of the failed mobile switching center. 4. The method according to claim 3, wherein the sending a location information request message to a mobile terminal currently belonging to the faulty mobile switching center is specifically: The backup mobile switching center sends a location information request message to the mobile terminal currently belonging to the faulty mobile switching center according to the data of the visitor location register of the faulty mobile switching center backed up by it. 5. The method according to claim 4, wherein the location information request message is a paging message, and the response message of the location information request message is a paging response message; or The location information request message is a notification message for location registration, and the response message of the location information request message is a location registration message. 6. The method according to claim 5, wherein the access control device forwards the location information request message of the mobile terminal to an active MSC or an active MSC server in the MSC pool The response message is specifically: The access control device receives the response message of the mobile terminal to the location information request message, and sends the response message of the location information request message to an active MSC in the MSC pool according to the load sharing principle. 7. The method according to claim 1, wherein the failure processing device is a backup media gateway of the failed mobile switching center server. 8. The method according to claim 7, wherein the sending a location information request message to a mobile terminal currently belonging to the faulty mobile switching center server specifically comprises: The backup media gateway sends a location information request message to the mobile terminal currently belonging to the faulty MSC server according to the data of the visitor location register of the faulty MSC server backed up by it. 9. The method according to claim 8, wherein the location information request message is a paging message, and the response message of the location information request message is a paging response message; or The location information request message is a notification message for location registration, and the response message of the location information request message is a location registration message. 10. The method according to claim 9, wherein the access control device forwards the location information request message of the mobile terminal to an active mobile switching center or an active mobile switching center server in the mobile switching center pool The response message is specifically: The access control device receives the response message of the mobile terminal to the location information request message, and sends the response message of the location information request message to the media gateways in the mobile switching center pool according to the load sharing principle, and the The media gateway forwards the response message of the location registration request message to the active MSC server in the MSC pool according to the load sharing principle. 11. The method according to any one of claims 1 to 10, wherein the fault processing device sends a location information request message to a mobile terminal currently belonging to a faulty mobile switching center or a mobile switching center server, specifically: : Divide the cells where the mobile terminal currently resides recorded by the faulty mobile switching center or the mobile switching center server into different batches, and send location information request messages for the mobile terminal to the cells in batches. 12. The method according to claim 11, further comprising: Judging whether the mobile terminals belonging to the faulty mobile switching center or the mobile switching center server have all received the location information request message, if not, then expand the sending range of the location information request message, and continue to respond to those that have not received the location information request message. The mobile terminal of the location information request message sends the location information request message. 13. A fault handling device, characterized in that it comprises: A failure information acquisition unit, configured to acquire failure information of a failure mobile switching center or mobile switching center server in the mobile switching center pool; The location information request message initiating unit is configured to, after the fault information obtaining unit obtains the information that the faulty mobile switching center or mobile switching center server in the mobile switching center pool fails, send a message to the mobile switching center currently belonging to the mobile switching center or The mobile terminal of the mobile switching center server sends a location information request message, wherein the location information request message includes a paging message and a notification message for performing location registration. 14. The device according to claim 13, wherein the location information request message initiating unit comprises: The paging message initiating unit is configured to send a paging message to the mobile switching center or mobile switching center belonging to the mobile switching center or mobile switching center after the fault information obtaining unit obtains information that the faulty mobile switching center or mobile switching center server in the mobile switching center pool fails. The mobile terminal of the server sends a paging message; and/or The notification message initiating unit for location registration is used to send a message to the mobile switching center or mobile switching center that belongs to the mobile switching center or The mobile terminal of the mobile switching center server sends a notification message for location registration. 15. The device according to claim 13 or 14, wherein the fault processing device is a backup mobile switching center of a faulty mobile switching center in the mobile switching center pool, or is a faulty mobile switching center in the mobile switching center pool. A backup media gateway for the mobile switching center server. 16. A mobile switching center pool failure processing system, used to process the call of a mobile terminal under a faulty mobile switching center or a faulty mobile switching center server in the mobile switching center pool, it is characterized in that it includes: at least one fault processing device, at least one an access control device and at least one active mobile switching center or active mobile switching center server; The failure processing device is used to obtain the failure information of the failure mobile switching center or mobile switching center server in the mobile switching center pool, and send a location information request to the mobile terminal currently belonging to the failure mobile switching center or mobile switching center server information; The access control device is configured to receive a response message to the location information request message sent by the mobile terminal, and forward the response message to the location information request message according to a load sharing principle; The active mobile switching center or the active mobile switching center server is configured to receive the response message of the location information request message forwarded by the access control device, update the location according to the response message of the location information request message, and update the mobile The terminal switches to an active MSC or an active MSC server in the MSC pool. 17. The system according to claim 16, wherein the fault handling device comprises: A failure information acquisition unit, configured to acquire failure information of a failure mobile switching center or mobile switching center server in the mobile switching center pool; The location information request message initiating unit is configured to, after the fault information obtaining unit obtains the information that the faulty mobile switching center or mobile switching center server in the mobile switching center pool fails, send a message to the mobile switching center currently belonging to the mobile switching center or The mobile terminal of the mobile switching center server sends a location information request message, wherein the location information request message includes a paging message and a notification message for performing location registration. 18. The system according to claim 16 or 17, wherein the failure processing device is a backup mobile switching center of the failed mobile switching center. 19. The system according to claim 16 or 17, wherein the failure processing device is a backup media gateway of the failed mobile switching center server.

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