CN101977396B - System and method for realizing network element service switching in multimedia messaging service - Google Patents

Abstract

The present invention discloses a system for implementing network element service switching in multimedia message services, including a multimedia message service center and a peer network element; wherein, the multimedia message service center is used to send a request to the peer network element and wait for the peer network Element response: the peer network element is used to return a success or failure response to the multimedia message service center according to whether the state of the network element is normal or abnormal after receiving the request sent by the multimedia message service center. Through the MMSC, the present invention can automatically switch the service to the standby peer network element after timely detecting that the main peer network element fails; and can automatically complete the service switchback operation after timely detecting that the master peer network element returns to normal. The whole process of the operation of the invention is automatically completed without manual intervention, and can ensure that the multimedia message service still has a high success rate when the primary and opposite network elements fail suddenly.

Description

System and method for implementing network element service switching in multimedia message service

technical field

The present invention relates to multimedia messaging service (MMS, Multimedia Messaging Service) technology, in particular to a system and method for realizing network element service switching in MMS.

Background technique

The multimedia message service is a message service that can transmit multimedia content between mobile phones, between service providers and mobile phones, and between mobile phones and other applications such as Email servers. At present, the multimedia message service has been widely developed, especially the content-rich, timely and fast service provided by service providers for mobile phone users has enriched the lives of users.

The network element that receives the request message sent by the MMSC and returns the response message in the multimedia message service process is collectively referred to as the peer network element, mainly including the data service management platform (DSMP, DataService Management Platform), telephone number mapping domain name server (ENUM DNS) , Domain Name System for storage of E.164numbers) and Short Message Service Center (SMSC, Short Message Service Center), etc.

The multimedia message service process is relatively complicated, and there are many peer network elements. The failure of any peer network element in the service process may have a serious impact on the success rate of the multimedia message service. Generally, it is necessary to set up a backup peer network element for such a network element (may be referred to as a primary peer network element), and the latter is used to temporarily replace the former to provide services, in case the failure of the primary peer network element causes service interruption.

In the multimedia message business process, when the primary peer network element fails, how can the Multimedia Messaging Service Center (MMSC) detect the fault state of the network element as soon as possible and switch the service to the standby peer network element , is a key issue to ensure uninterrupted services; at the same time, because the standby peer network element is only used to provide services temporarily, how can the service be switched back from the standby peer network element after the master peer network element returns to normal state , is also a problem to be considered. A complete solution to this has not been given in the existing multimedia message service flow.

Contents of the invention

The technical problem to be solved by the present invention is to provide a system and method for implementing network element service switching in multimedia message services, which can automatically detect the fault state of the peer network element and perform service switching in time.

In order to solve the above technical problems, the present invention provides a system for implementing network element service switching in multimedia message services, including a multimedia message service center and a peer network element, wherein:

The multimedia message service center is used to send a request to the peer network element and wait for the peer network element to respond;

The opposite network element is configured to return a success or failure response to the multimedia message service center according to whether the state of the network element is normal or abnormal after receiving the request sent by the multimedia message service center.

further,

The multimedia message service center analyzes the status of the peer network element according to the received response statistics of the peer network element at regular intervals, as a basis for whether to switch the network element service.

Further, the peer network element includes a master peer network element and a backup peer network element, where:

The primary and opposite network elements are used to carry services when the status is normal;

The standby peer network element is used to temporarily assume business when the master peer network element is in an abnormal state;

Alternatively, multiple peer network elements are active peer network elements and backup peer network elements.

Further, the multimedia message service center includes a response processing module, a timing module and a request sending module connected in sequence, wherein:

A response processing module, configured to accumulate the number of successful responses according to the received responses returned by each peer network element;

The timing module is used to count the request response success rate of each peer network element according to the quotient of the response success times and the request delivery times within the preset timing time granularity; when the statistical business success rate is lower than the preset threshold , set the state of the corresponding peer network element as abnormal, and notify the request delivery module;

The request sending module is used to decide whether to send a request to the primary peer network element or to the backup peer network element according to whether the state of the peer network element is normal, and to accumulate the number of requests issued by the peer network element to which the request is sent.

further,

After counting the success rate of the request response of each peer network element, the timing module resets the number of successful responses and the number of requests issued by the peer network element, and sets the peers that have been set as abnormal in the previous time granularity The network element allocates the detection quota preset as the initial value; the peer network element whose status is set as abnormal is also notified to the response processing module;

The response processing module is also connected with the request sending module. While accumulating the number of successful responses, it also accumulates the number of successful detection responses of the peer network element that has been in an abnormal state and returned a successful response to the detection request; Request to clear the probe quota corresponding to the peer network element that returns a failed response;

The request sending module sends the request to the primary peer network element when the state of the primary peer network element is normal or abnormal but has a detection quota; when the state of the primary peer network element is abnormal and there is no detection quota, it sends the request For the standby peer network element with a normal or abnormal state but with a detection quota; subtract 1 from the corresponding detection quota of the main peer network element and/or standby peer network element whose status is abnormal but has a detection quota, And the corresponding request is identified as a probe request; if there is a probe quota, the value of the probe quota is not zero; if there is no probe quota, the value of the probe quota is zero.

Further, the multimedia message service center also includes a network element service switching module connected to the response processing module, wherein:

The response processing module judges that the peer network element has returned a successful response to all probe requests issued when the accumulated number of successful probe responses to the peer network element in the abnormal state is equal to the initial value of the probe quota, Then set the peer network element to be in normal state, and at the same time clear the corresponding detection quota; transfer the peer network element that is set to normal state and/or the peer network element with abnormal state notified by the timing module to the network element service switch module;

The network element service switching module is used to switch the service of the main peer network element to the standby peer network element when the state of the standby peer network element corresponding to the abnormal master peer network element is judged to be normal; If the peer network element in a normal state is the master peer network element, the services running on the corresponding standby peer network element are switched back to the master peer network element.

In order to solve the above-mentioned technical problems, the present invention provides a multimedia message service center for implementing network element service switching in the multimedia message service, including a response processing module, a timing module, and a request sending module connected in sequence, wherein:

The response processing module is used for accumulating the number of successful responses according to the received response returned by each peer network element for the sending request;

The timing module is used to count the request response success rate of each peer network element according to the quotient of the response success times and the request delivery times within the preset timing time granularity; when the statistical business success rate is lower than the preset threshold , set the state of the corresponding peer network element as abnormal, and notify the request delivery module;

The request sending module is used to decide whether to send the request to the primary peer network element or to the standby peer network element according to whether the state of the peer network element is normal, and to accumulate the peer network elements that have been issued the request The number of requests sent.

further,

After the timing module has counted the success rate of the request response of each peer network element, it resets the number of successful responses and the number of requests sent by the peer network element, and sets the status of the peer that has been set to be abnormal under the previous time granularity The network element allocates a detection quota preset as an initial value; the peer network element whose status is set to be abnormal is also notified to the response processing module;

The response processing module is also connected with the request sending module, and while accumulating the number of successful responses, it accumulates the number of successful detection responses of the peer network element that has been in an abnormal state and returned a successful response to the detection request; it will be in an abnormal state and The detection quota corresponding to the peer network element that returns a failed response to the detection request is cleared;

The request sending module sends the request to the primary peer network element when the state of the primary peer network element is normal or abnormal but has a detection quota; when the state of the primary peer network element is abnormal and there is no detection quota, it sends the request To the standby peer network element whose state is normal or abnormal but has a detection quota; the corresponding detection quota of the main peer network element and/or standby peer network element whose status is abnormal but has a detection quota is reduced by 1, and The corresponding request is identified as a probe request; with a probe quota means that the value of the probe quota is not zero, and without a probe quota means that the value of the probe quota is zero.

Further, it also includes a network element service switching module connected to the corresponding processing module, wherein:

The response processing module judges that the peer network element returns a successful response to all the probe requests issued when the accumulated number of successful probe responses to the peer network element in an abnormal state is equal to the initial value of the probe quota, and then sends The peer network element is set as normal, and the corresponding detection quota is cleared at the same time; the peer network element that is set as normal and/or the peer network element with an abnormal state notified by the timing module is conveyed to the network element service switching module ;

The network element service switching module is used to switch the service of the main peer network element to the standby peer network element when the state of the standby peer network element corresponding to the abnormal master peer network element is judged to be normal; If the peer network element in a normal state is the master peer network element, the services running on the corresponding standby peer network element are switched back to the master peer network element.

In order to solve the above technical problems, the present invention provides a method for implementing network element service switching in multimedia message services, involving a multimedia message service center and a peer network element, the method comprising:

The multimedia message service center sends a request to the peer network element, and waits for a response from the peer network element;

After receiving the request sent by the multimedia message service center, the peer network element returns a success or failure response to the multimedia message service center according to whether the state of the network element is normal or abnormal.

Further, the method also includes:

The multimedia message service center statistically analyzes the state of each peer network element according to the success or failure response received from each peer network element within a period of time, as the basis for whether to switch network element services.

Further, the peer network element includes a master peer network element and a backup peer network element, where:

The primary peer NE carries services when the state is normal, and the backup peer NE temporarily undertakes services when the primary peer NE is in an abnormal state; or, multiple peer NEs are mutually active and standby network element.

Further, the method specifically includes: a multimedia message service center,

When receiving the response returned by the peer network element within a predetermined timing granularity, accumulate the number of successful responses of the peer network element; within the timing granularity, count each peer according to the quotient of the successful response times and the number of request delivery times The request response success rate of the network element; when the statistical service success rate is lower than the preset threshold, the corresponding peer network element is set as abnormal; according to whether the status of the peer network element is normal or not, it is determined NE or the standby peer NE sends a request;

When it is judged that the status of the backup peer network element corresponding to the master peer network element whose status is set to be abnormal is normal, the service of the master peer network element is switched to the backup peer network element.

Further, the multimedia message service center

While accumulating the number of successful responses, it also accumulates the number of successful probe responses of the peer network elements that are in an abnormal state and return a successful response to the probe request, and count the number of peer network elements that are in an abnormal state and return a failure response to the probe request The corresponding detection quota is cleared;

After counting the request response success rate of each peer NE, reset the number of successful responses and the number of requests issued by the peer NE, and allocate a reservation The probe quota set to the default value.

Further, the multimedia message service center decides to issue a request to the primary peer network element or the standby peer network element according to whether the state of the peer network element is normal or not, which means:

When the status of the primary peer NE is normal or abnormal but there is a detection quota, the request is sent to the primary peer NE; when the status of the primary peer NE is abnormal and there is no detection quota, the request is sent to the normal or The standby peer NE with an abnormal status but with a detection quota; subtract one from the corresponding detection quota of the primary peer NE and/or standby peer NE that is requested to be in an abnormal state but with a detection quota, and the corresponding The request is identified as a probe request; with a probe quota means that the allocated probe quota is not zero; without a probe quota means that no probe quota has been allocated or the allocated probe quota is zero.

Further, the method also includes:

When the accumulated number of successful detection responses to the peer network element in the abnormal state is equal to the initial value of the detection quota, the multimedia message service center judges that the peer network element returns a successful response to all the probe requests issued, and then sends The peer network element is reset to a normal state;

When it is judged that the peer network element reset to a normal state is the master peer network element, the services running on the corresponding standby peer network element are switched back to the master peer network element.

In the system and method of the present invention, the MMSC can detect in time that the main peer network element fails and then automatically switch the service to the standby peer network element; and can detect in time that the master peer network element returns to normal and automatically complete the service return. cut operation. The whole process of the method of the invention is automatically completed without manual intervention, and can ensure that the multimedia message service still has a relatively high success rate when the primary and opposite network elements fail suddenly.

Description of drawings

FIG. 1 is a schematic structural diagram of a system embodiment for implementing network element service switching according to the present invention;

Fig. 2 is a schematic structural diagram of an embodiment of a network element service switching device in the MMSC shown in Fig. 1;

FIG. 3 is a flow chart of an embodiment of a method for implementing network element service switching according to the present invention;

Fig. 4 is a flow chart of timing time granularity to processing in the embodiment of the method for realizing network element service switching in the present invention;

FIG. 5 is a flow chart of sending request processing in an embodiment of a method for implementing network element service switching according to the present invention;

FIG. 6 is a flow chart of receiving a response in an embodiment of the method for implementing network element service switching according to the present invention.

Detailed ways

The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. The following examples are only used to illustrate and explain the present invention, but not to limit the technical solution of the present invention.

The structure of the embodiment of the system for implementing network element service switching in the present invention is shown in Figure 1, including MMSC and opposite network element, wherein:

The MMSC is used to send a request to the peer network element and wait for a response from the peer network element;

The peer network element is used to return a success response to the MMSC if the status of the network element is normal after receiving the request from the MMSC, and otherwise return a failure response to the MMSC.

The MMSC sends a request to the peer network element, and statistically analyzes the running status of the peer network element according to the received response of the peer network element at intervals, as a basis for whether to switch network element services. Preferably, the running status of the peer network element is statistically analyzed according to the received response of the peer network element within the timing granularity.

The peer network element includes a master peer network element and a standby peer network element. Generally speaking, the main peer network element bears the service; when an abnormality occurs, the standby peer network element temporarily assumes the service. Of course, multiple peer network elements can also be master and backup network elements.

In addition, MMSC is responsible for saving and forwarding multimedia service messages, receiving multimedia service messages submitted by users, value-added service platforms (VASP) or other MMSCs, and then performing authentication through DSMP network elements, or querying the user's belonging MMSC information through ENUM DNS, Or send notification messages and user delivery report messages to SMSC.

The peer network element includes one or more of DSMP, ENUM DNS and SMSC.

Before continuing to describe the technical solution of the present invention, the terms used to realize the technical solution are described as follows:

The number of requests sent, counts the request messages sent by each peer network element, and is used to count the request response success rate within the timing granularity.

The number of successful responses, which counts the successful responses to the request messages sent by each peer network element, and is used to count the success rate of request responses within the granularity of the timing time.

Detection quota, a parameter used to detect whether the peer network element is back to normal, and its initial value is preset by the system.

The number of successful probe responses, which counts the successful responses of the probe request messages sent by each peer network element, and is used to count the success rate of probe request responses within the granularity of the timing time.

When the timing granularity starts timing, if the status of the peer network element is abnormal, the detection quota will be allocated to it.

When the peer network element is in an abnormal state, but its detection quota is not zero, it still sends services to it, and identifies the service as a detection message, and its detection quota is reduced by 1 every time a detection message is sent to it.

After receiving the failure response of the detection message, it is considered that the peer network element is still abnormal, and the detection quota is set to zero, and its detection is stopped; when the successful response of the detection message is received, the number of successful detection messages The number of successful messages is equal to the initial value of the detection quota. If it is judged that all the detection messages have responded successfully, the end network element is considered to be back to normal, and the state of the opposite end network element is set to normal.

In normal state, when it is known through statistical analysis that the peer network element is in a normal state, all service messages that should be sent to the peer network element are directly sent to the peer network element.

Abnormal state, when it is known through statistical analysis that the peer network element is in an abnormal state, if there is a service message that should be sent to the peer network element, then when it is judged that it has a detection quota, the service message is sent to the peer network element; Otherwise, it needs to check whether its standby peer network element is available, that is, if its standby peer network element is in a normal state or in an abnormal state but has a detection quota, if it is available, send the service message to the standby peer network element , if it is not available, the service message is still sent to the main peer network element.

The structure of the embodiment of the network element service switching device in the MMSC is shown in Figure 2, including a response processing module, a timing module and a request delivery module connected in sequence, wherein:

The timing module is used to count the request response success rate of each peer network element within the preset timing time granularity, and reset the number of successful responses and request delivery times of each peer network element; When it is lower than the preset threshold, set the status of the corresponding peer network element as abnormal, and notify the request sending module and the response processing module respectively; assign detection to the peer network element that has been set as abnormal at the previous time granularity quota;

The timing module counts the request response success rate of each peer network element within the timing time granularity, which is equal to the number of successful responses/the number of requests sent.

The request sending module is used to decide whether to send a request message to the main peer network element or to the backup peer network element according to whether the state of the peer network element is normal or not;

The request sending module sends the request message to the primary peer network element when the state of the primary peer network element is normal or abnormal but has a detection quota; when the state of the primary peer network element is abnormal and there is no detection quota, the request message The request message will be sent to the backup peer NE with a normal or abnormal status but with a detection quota; the corresponding detection quota of the primary peer NE and/or backup peer NE with a request message that is abnormal but with a detection quota will be reduced. Remove 1, and identify the corresponding request message as a probe request; accumulate the number of requests sent by the peer network element that has sent the request message.

It is judged whether the peer network element has a detection quota, for example, it is judged whether the detection quota of the peer network element is greater than zero.

In addition, the present invention can also use other methods to process the detection quota in other embodiments, for example: 1) when the detection quota is not allocated, the value of the detection quota is a negative integer; 2) when the detection quota is allocated, the detection quota The initial value of is a positive integer greater than zero; 3) When judging whether the peer network element has a detection quota, it is judged whether the detection quota of the peer network element is an integer equal to zero or less than zero.

When the status of the standby peer network element is abnormal and there is no detection quota, the request sending module will still send the request message to the master peer network element.

The response processing module is connected with the request sending module, and is used to count the number of successful responses of the peer network element according to the received response message returned by each peer network element; For the peer network element, clear its detection quota to zero, and stop its continuous detection; for the peer network element that is in an abnormal state and all detection messages return success, set it to a normal state, and clear the detection quota at the same time Quota and peer network element notification request delivery module set to normal state.

The embodiment of the network element service switching device shown in Figure 2 also includes a network element service switching module connected to the response processing module, wherein:

The response processing module forwards the peer network element set to a normal state and/or the peer network element with an abnormal state notified by the timing module to the network element service switching module;

The network element service switching module is used to switch the service of the main peer network element to the standby peer network element when the state of the standby peer network element corresponding to the abnormal master peer network element is judged to be normal; If the peer network element set to the normal state is the master peer network element, the services running on the corresponding standby peer network element are switched back to the master peer network element.

Aiming at the above-mentioned system embodiment, the present invention also provides a method embodiment for realizing service switching of network elements accordingly, the flow of which is shown in FIG. 3 , including the following steps:

310: The MMSC sends a request to the peer network element, and waits for a response from the peer network element;

320: After receiving the MMSC request, the peer network element returns a success or failure response according to whether the status of the local network element is normal or abnormal.

The peer network element includes a master peer network element and a standby peer network element. Generally speaking, the main peer network element undertakes the business; when an abnormality occurs, the standby peer network element temporarily undertakes the business. Of course, multiple peer network elements can also be master and backup network elements.

The process shown in Figure 3 also includes steps:

330: The MMSC statistically analyzes the running status of the peer network element according to the response received from the peer network element at intervals, as a basis for whether to switch network element services.

Preferably, the running state of the peer network element is statistically analyzed within the time granularity.

Specifically, including:

When the MMSC sends a request to the peer network element, it accumulates the number of requests issued by the peer network element; when it receives the response returned by the peer network element, it accumulates the number of successful responses of the peer network element; at the timing granularity Internally count the request response success rate of each peer network element, which is equal to the number of successful responses/the number of requests issued; when the statistical business success rate is lower than the preset threshold, the corresponding peer network element status is set as abnormal; When it is judged that the status of the backup peer network element corresponding to the master peer network element whose status is set to be abnormal is normal, the service of the master peer network element is switched to the backup peer network element.

As shown in Figure 4, be the processing flow that MMSC starts to timing time granularity in the above-mentioned method embodiment of the present invention, it is the timing time granularity (as being 1 minute) realized by a timer that MMSC creates when system initialization. When the preset timing time of the timer expires, it means that the new timing time granularity starts, including the following steps:

401: Count the request response success rate of each peer network element at the previous time granularity, which is equal to the number of successful responses/the number of requests sent;

402: Reset the number of successful responses and the number of requests sent by each peer network element (such as clearing), and allocate the detection quota preset as the initial value to the peer network element with an abnormal state;

403: Judging whether the request response success rate of the peer network element is less than the set threshold, if yes, execute step 404, otherwise end the process;

404: Set the peer network element as abnormal, so as to suspend sending services to it; end the process.

As shown in Figure 5, it is the processing flow of the delivery object of the MMSC according to the status of the peer network element in the above-mentioned method embodiment of the present invention, including the following steps:

501: A request message to be delivered to the peer network element is received;

502: Judging whether the state of the primary and peer network elements is normal, if yes, execute step 503, otherwise execute step 504;

503: Send the request message to the master-peer network element, and accumulate the number of requests sent by the master-peer network element; end the process;

504: Determine whether the master-peer network element has a detection quota, if yes, execute step 505, otherwise execute step 506;

Here, it is determined whether the master-peer network element has a detection quota, for example, it is judged whether the detection quota of the master-peer network element is greater than zero.

505: Identify the request message as a probe message, and decrement the corresponding probe quota by 1; execute step 503;

506: Judging whether the state of the standby peer network element is normal, if yes, execute step 507, otherwise execute step 508;

507: Send the request message to the backup peer network element, accumulatively send the number of requests corresponding to the backup peer network element; end the process;

508: Judging whether the standby peer network element has a detection quota, if yes, execute step 509, otherwise execute step 503;

Here, it is determined whether the standby peer network element has a detection quota, for example, it is judged whether the value of the detection quota of the standby peer network element is an integer greater than zero.

509: Identify the request message as a probe message, and decrease the corresponding probe quota by 1; go to step 507.

As shown in Figure 6, it is the operation process of switching the state of the opposite network element according to the received response message of the opposite network element by the MMSC in the above method embodiment of the present invention, including the following steps:

601: Receive a response message returned by the peer network element to the sending request;

602: Judging whether it is a successful response, if yes, execute step 603, otherwise execute step 608;

603: Accumulate the number of successful responses corresponding to the peer network element;

604: Determine whether the response message corresponds to a detection request, if yes, execute step 605, otherwise end the process;

605: Accumulate the number of successful probe responses corresponding to the peer network element;

606: Determine whether all the probe messages corresponding to the peer network element have responded successfully, that is, whether the corresponding number of successful probe responses is the same as the initial value of the probe quota, if yes, perform step 607, otherwise end the process;

All detection messages return a successful response, indicating that the opposite network element has returned to normal, and it is set as normal, and the service can be switched back from its standby network element.

607: Set the state of the peer network element to be normal, and end the process;

608: Determine whether the response message corresponds to a detection request, if yes, execute step 609, otherwise end the process;

609: Set the detection quota corresponding to the peer network element to zero, and end the process.

Use the detection request message to detect whether the peer NE in the abnormal state is back to normal. If a failure response is returned corresponding to the detection request message, it indicates that the peer network element has not recovered, and it is meaningless to continue detection. Therefore, the detection quota is cleared, that is, in Stop detecting it within the time granularity.

Through the above system and method embodiments, the present invention enables the MMSC to timely judge that the peer network element is faulty, and automatically complete the switching operation of the network element business accordingly; at the same time, by regularly detecting the faulty network element, it can be restored to normal when it is found After that, the service rollback operation is automatically completed. Moreover, the entire operation process is automatically completed without manual intervention, and a high success rate of multimedia message services can still be guaranteed when the primary and peer network elements fail suddenly.

The foregoing is only a specific embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the principle of the present invention. It should be regarded as the protection scope of the present invention.

Claims (8)

1. A system for realizing network element service switching in a multimedia message service, comprising a multimedia message service center and a peer network element, characterized in that: The multimedia message service center is configured to send a request to the peer network element, and wait for a response from the peer network element; The peer network element is configured to, after receiving the request sent by the multimedia message service center, return a success or failure response to the multimedia message service center according to whether the state of the network element is normal or abnormal; The peer network element includes a master peer network element and a standby peer network element, wherein: The master-to-peer network element is used to carry services when the state is normal; The standby peer network element is used to temporarily undertake services when the master peer network element is in an abnormal state; Or, multiple peer network elements are the master peer network element and the standby peer network element; The multimedia message service center includes a sequentially connected response processing module, a timing module and a request sending module, wherein: The response processing module is configured to accumulate the number of successful responses according to the received response returned by each peer network element; The timing module is used to count the request response success rate of each peer network element according to the quotient of the number of successful responses and the number of times of request delivery within the preset timing time granularity; when the statistical business success rate is lower than the preset When the threshold is set, the state of the corresponding peer network element is set as abnormal, and the request sending module is notified; The request sending module is configured to decide to send the request to the main peer network element or to the backup peer network element according to whether the state of the peer network element is normal or not, and the cumulative number of issued requests is The number of times the request is issued by the requested peer network element; The timing module also resets the number of successful responses and the number of requests issued by the peer network element after counting the success rate of the request response of each peer network element, and sets it to the state for the previous time granularity The abnormal peer network element is assigned a detection quota preset as an initial value; the peer network element whose status is abnormal is also notified to the response processing module; The response processing module is also connected to the request sending module, and while accumulating the number of successful responses, it also accumulates the number of successful detection responses of the peer network element that is in an abnormal state and returns a successful response to the detection request; The detection quota corresponding to the peer network element that is in an abnormal state and returns a failed response to the detection request is cleared; The request issuing module sends the request to the master peer network element when the state of the master peer network element is normal or the state is abnormal but there is a detection quota; when the master peer network element is abnormal and there is no When detecting the quota, send the request to the standby peer network element whose state is normal or abnormal but has the detection quota; the master peer network element and/or the standby network element that will be sent the request is abnormal but has the detection quota The corresponding detection quota of the peer network element is subtracted by 1, and the corresponding request is identified as the detection request; the detection quota is that the value of the detection quota is not zero, and the detection quota is not zero. The value of the quota is zero; The multimedia message service center also includes a network element service switching module connected to the response processing module, wherein: The response processing module judges that the peer network element has no problem with all the probe requests issued when the accumulated number of successful probe responses to the peer network element in the abnormal state is equal to the initial value of the probe quota. If a successful response is returned, the peer network element is set to be in a normal state, and the corresponding detection quota will be cleared; the peer network element that is set to a normal state and/or the peer network that is notified by the timing module is abnormal The element is forwarded to the network element service switching module; The network element service switching module is used to switch the service of the main peer network element to the standby peer network element when the status of the standby peer network element corresponding to the abnormal master peer network element is judged to be normal; When it is judged that the normal peer network element is the master peer network element, the services running on the corresponding standby peer network element are switched back to the master peer network element. 2. The system of claim 1, wherein: The multimedia message service center statistically analyzes the status of the peer network element according to the response received from the peer network element at intervals, as a basis for whether to switch network element services. 3. A multimedia message service center that realizes network element service switching in a multimedia message service, including a response processing module, a timing module, and a request sending module connected in sequence, wherein: The response processing module is configured to accumulate the number of successful responses according to the received response returned by each peer network element for the sending request; The timing module is used to count the request response success rate of each peer network element according to the quotient of the number of successful responses and the number of times of request delivery within the preset timing time granularity; when the statistical business success rate is lower than the preset When the threshold is set, the state of the corresponding peer network element is set as abnormal, and the request sending module is notified; The request sending module is used to decide whether to send the request to the main peer network element or to the backup peer network element according to whether the state of the peer network element is normal, and to accumulatively send the request to the peers The number of times the network element sends the request; The timing module also resets the number of successful responses and the number of requests issued by the peer network element after counting the success rate of the request response of each peer network element, and sets it to the state for the previous time granularity The abnormal peer network element is assigned a detection quota preset as an initial value; the peer network element whose status is abnormal is also notified to the response processing module; The response processing module is also connected to the request sending module, and while accumulating the number of successful responses, it also accumulates the number of successful detection responses of the peer network element that is in an abnormal state and returns a successful response to the detection request; The detection quota corresponding to the peer network element that is in an abnormal state and returns a failed response to the detection request is cleared; The request issuing module sends the request to the master peer network element when the state of the master peer network element is normal or the state is abnormal but there is a detection quota; when the master peer network element is abnormal and there is no When detecting the quota, send the request to the standby peer network element whose state is normal or abnormal but has the detection quota; the master peer network element and/or the standby network element that will be sent the request is abnormal but has the detection quota The corresponding detection quota of the peer network element is reduced by 1, and the corresponding request is identified as the detection request; the said detection quota means that the value of the detection quota is not zero, and the no detection quota means that the detection The value of the quota is zero; The multimedia message service center also includes a network element service switching module connected to the response processing module, wherein: The response processing module judges that the peer network element has no problem with all the probe requests issued when the accumulated number of successful probe responses to the peer network element in the abnormal state is equal to the initial value of the probe quota. If a successful response is returned, the peer network element is set to be in a normal state, and the corresponding detection quota will be cleared; the peer network element that is set to a normal state and/or the peer network that is notified by the timing module is abnormal The element is forwarded to the network element service switching module; The network element service switching module is used to switch the service of the main peer network element to the standby peer network element when the status of the backup peer network element corresponding to the abnormal master peer network element is judged to be normal; When it is judged that the normal peer network element is the master peer network element, the services running on the corresponding standby peer network element are switched back to the master peer network element. 4. A method for implementing network element service switching in a multimedia message service, involving a multimedia message service center and a peer network element, the method comprising: The multimedia message service center sends a request to the peer network element, and waits for a response from the peer network element; After receiving the request sent by the multimedia message service center, the peer network element returns a success or failure response to the multimedia message service center according to whether the state of the network element is normal or abnormal; When the response returned by the peer network element is received within a predetermined timing granularity, accumulate the number of successful responses of the peer network element; within the timing granularity, according to the number of successful responses and the request The quotient of the number of sending times counts the success rate of the request response of each peer network element; when the statistical business success rate is lower than the preset threshold, the corresponding peer network element is set to be in an abnormal state; according to the peer network element Whether the state of the network element is normal or not determines whether to send the request to the main peer network element or the standby peer network element; When the standby peer network element corresponding to the primary peer network element whose status is determined to be abnormal is normal, switch the service of the primary peer network element to the standby peer network element; While accumulating the number of successful responses, the multimedia message service center also accumulates the number of successful probe responses of peer network elements that have been in an abnormal state and returned a successful response to the probe request, and will be in an abnormal state and respond to the probe request The detection quota corresponding to the peer network element that returns a failed response is cleared; After counting the request response success rate of each peer network element, reset the number of successful responses and the number of requests issued by the peer network element, and set the peers that have been set to abnormal status under the granularity of the previous time The network element allocates the detection quota preset as the initial value. 5. The method according to claim 4, further comprising: The multimedia message service center statistically analyzes the status of each peer network element according to the success or failure response received from each peer network element at intervals, as a basis for whether to switch network element services. 6. The method according to claim 5, wherein the peer network element comprises a master peer network element and a standby peer network element, wherein: The primary peer network element carries services when the state is normal, and the standby peer network element temporarily undertakes services when the primary peer network element is in an abnormal state; or, multiple peer network elements are mutually active The peer network element and the standby peer network element. 7. The method according to claim 6, wherein the multimedia message service center decides to send the message to the main peer network element or the backup peer network element according to whether the state of the peer network element is normal or not. The above request means: When the state of the primary peer network element is normal or the state is abnormal but there is a detection quota, send the request to the primary peer network element; when the state of the primary peer network element is abnormal and there is no detection quota, send the request to the primary peer network element The above request is sent to the standby peer network element with a normal or abnormal state but with a detection quota; the corresponding detection quota of the primary peer network element and/or the backup peer network element that is sent to the request is abnormal but has a detection quota One is subtracted, and the corresponding request is identified as the probe request; the presence of probe quota means that the allocated probe quota is not zero, and the absence of probe quota means that no probe quota has been allocated or the allocated probe quota is zero. 8. according to the method for claim 7, is characterized in that, also comprises: When the number of successful detection responses accumulated by the multimedia message service center to the opposite network element in the abnormal state is equal to the initial value of the detection quota, it is judged that the opposite network element has no problem with all the issued detection requests. If a successful response is returned, the peer network element is reset to a normal state; When it is judged that the peer network element reset to a normal state is the master peer network element, the services running on the corresponding standby peer network element are switched back to the master peer network element.