WO2012051778A1 - 多媒体消息业务中实现网元业务切换的系统及方法 - Google Patents

多媒体消息业务中实现网元业务切换的系统及方法 Download PDF

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Publication number
WO2012051778A1
WO2012051778A1 PCT/CN2010/080453 CN2010080453W WO2012051778A1 WO 2012051778 A1 WO2012051778 A1 WO 2012051778A1 CN 2010080453 W CN2010080453 W CN 2010080453W WO 2012051778 A1 WO2012051778 A1 WO 2012051778A1
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Prior art keywords
network element
peer network
request
quota
response
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PCT/CN2010/080453
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English (en)
French (fr)
Inventor
曹俊勇
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中兴通讯股份有限公司
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Publication of WO2012051778A1 publication Critical patent/WO2012051778A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12—Messaging; Mailboxes; Announcements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H04L51/07—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail characterised by the inclusion of specific contents
    • H04L51/10—Multimedia information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H04L51/21—Monitoring or handling of messages
    • H04L51/23—Reliability checks, e.g. acknowledgments or fault reporting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node

Definitions

  • the present invention relates to Multimedia Messaging Service (MMS) technology, and more particularly to a system and method for implementing network element service switching in an MMS.
  • MMS Multimedia Messaging Service
  • a multimedia messaging service is a messaging service that delivers multimedia content between a mobile phone and a mobile phone, between a service provider and a mobile phone, and between other applications such as a mobile phone and an email server.
  • the multimedia messaging service has been widely carried out, especially the rich, timely and fast service provided by the service provider for mobile phone users, enriching the life of the user.
  • the network element that returns the response message after receiving the request message sent by the MMSC in the multimedia message service flow is collectively referred to as the peer network element, and mainly includes a data service management platform (DSMP, Data Service Management Platform) and a phone number mapping domain name server (ENUM). DNS, Domain Name System for storage of E.164 numbers ) and Short Message Service Center (SMS).
  • DSMP Data Service Management Platform
  • ENUM phone number mapping domain name server
  • DNS Domain Name System for storage of E.164 numbers
  • SMS Short Message Service Center
  • the multimedia message service process is more 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. It is generally necessary to set up a secondary peer network element for such a network element (which may be referred to as a primary peer network element), and the latter is used to temporarily replace the service provided by the former to prevent a service interruption caused by a failure of the primary peer network element.
  • MMSC Multimedia Messaging Service Center
  • the technical problem to be solved by the present invention is to provide a system and method for implementing network element service switching in a multimedia message service, which can automatically detect the fault state of the peer network element and perform service switching in time.
  • the present invention provides a system for implementing network element service switching in a multimedia message service, including a multimedia message service center and a peer network element, where:
  • the multimedia message service center is configured to: send a request to the peer network element, and wait for the response of the peer network element; the peer network element is set to: after receiving the request sent by the multimedia message service center, serve the multimedia message according to the state of the network element
  • the center returns a response. If the status of the NE is normal, a successful response is returned. If the status of the NE is abnormal, a failure response is returned.
  • the multimedia message service center is also configured to: analyze the state of the peer network element according to the response of the received network element at intervals, as the basis for switching the network element service.
  • the peer network element includes the primary peer network element and the standby peer network element, where:
  • the primary and secondary NEs are set to: carry services when the status is normal;
  • the standby peer NE is configured to: temporarily assume the service when the primary and secondary NEs are in abnormal state; or, the multiple peer NEs are the peer-to-peer NE and the standby peer NE.
  • the multimedia message service center includes a response processing module, a timing module, and a request delivery module, which are sequentially connected, where:
  • the response processing module is configured to: accumulate the number of successful responses according to the response returned by each peer network element received;
  • the timing module is configured to: categorize the success rate of the request response of each peer network element according to the number of response success times and the number of times the request is delivered within the preset timing time granularity; when the statistical service success rate is lower than the preset threshold The status of the corresponding peer NE is set to abnormal, and the requesting module is notified.
  • the requesting module is set to: Determine whether to go to the primary peer or to the alternate peer according to whether the state of the peer NE is normal or not.
  • the network element sends a request, and the number of times the request is sent by the peer NE that is sent the request.
  • the timing module is further configured to: after the completion of the request response success rate of the peer network elements, reset the number of successful response times of the peer network element and the number of times the request is delivered, and the status is abnormal after the previous time granularity.
  • the peer network element allocates a probe quota preset to an initial value; the peer network that sets the state to an abnormal state Meta notification to the response processing module;
  • the response processing module is further connected to the requesting delivery module, and is further configured to: accumulate the number of successful detection responses of the peer network element that has been in an abnormal state and return a successful response to the probe request while accumulating the number of successful responses; The abnormality status and the detection quota corresponding to the peer network element that returns the failure response for the probe request are cleared;
  • the requesting delivery module is configured to: when the status of the primary and secondary NEs is normal or the status is abnormal but there is a detection quota, the request is sent to the primary peer NE; when the status of the primary and secondary NEs is abnormal and there is no detection quota, The request is delivered to the standby peer NE that is in the normal state or the state is abnormal but has the probe quota. The corresponding probe quota of the primary peer NE and/or the standby peer that is sent the request but has the probe quota. Subtract 1 and identify the corresponding request as a probe request; the probe quota is that the value of the probe quota is not zero, and the absence of the probe quota means that the value of the probe quota is zero.
  • the multimedia message service center further includes a network element service switching module connected to the response processing module, where:
  • the response processing module is further configured to: when the number of successful detection responses of the peer network element in the abnormal state is equal to the initial value of the detection quota, determine that all the probe requests sent by the peer network element are If the successful response is returned, the peer network element is set to the normal state, and the corresponding detection quota is cleared.
  • the peer network element that is set to the normal state and/or the peer network element that is notified by the timing module is abnormal.
  • the network element service switching module is further configured to: when the number of successful detection responses of the peer network element in the abnormal state is equal to the initial value of the detection quota, determine that all the probe requests sent by the peer network element are If the successful response is returned, the peer network element is set to the normal state, and the corresponding detection quota is cleared.
  • the peer network element that is set to the normal state and/or the peer network element that is notified by the timing module is abnormal.
  • the network element service switching module is further configured to: when the number of successful detection responses of the peer network element in the abnormal
  • the network element service switching module is configured to: when the status of the standby peer network element of the primary peer network element in the abnormal state is normal, the service of the primary peer network element is switched to the standby peer network element; If the peer network element in the normal state is the master peer NE, the service running on the corresponding standby peer NE is switched back to the primary peer NE.
  • the present invention provides a multimedia message service center for implementing network element service switching in a multimedia message service, which includes a response processing module, a timing module, and a request delivery module, which are sequentially connected, where:
  • 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 delivery request;
  • the timing module is configured to: categorize the success rate of the request response of each peer network element according to the number of response success times and the number of times the request is delivered within the preset timing time granularity; when the statistical service success rate is lower than the preset threshold
  • the corresponding peer network element status is set to be abnormal, and the requesting delivery module is notified; the request delivery module is set to: determine whether to go to the primary peer network element or to the standby according to whether the status of the peer network element is normal or not
  • the peer network element delivers the request, and the number of times the request is sent by the peer network element that sends the request.
  • the timing module is further configured to: after the completion of the request response success rate of the peer network elements, reset the number of successful responses of the peer network element and the number of times the request is delivered, and set the status as abnormal in the previous time granularity.
  • the peer network element allocates a probe quota preset to an initial value; and the peer network element that sets the state to be abnormal is notified to the response processing module;
  • the response processing module is further connected to the request sending module, and is further configured to: accumulate the number of successful probe response times of the peer network element that has been in an abnormal state and returns a successful response to the probe request, while accumulating the number of successful responses; The probe quota corresponding to the peer network element that has been in an abnormal state and returns a failure response for the probe request is cleared;
  • the requesting delivery module is configured to: when the status of the primary and secondary NEs is normal or the status is abnormal but there is a detection quota, the request is sent to the primary peer NE; when the status of the primary and secondary NEs is abnormal and there is no detection quota, The request is delivered to the standby peer NE that is in the normal state or the state is abnormal but has the probe quota. The corresponding probe quota of the primary peer NE and/or the standby peer that is sent the request but has the probe quota. Decrease by 1 and identify the corresponding request as a probe request. If there is a probe quota, the value of the probe quota is not zero. If no probe quota is used, the value of the probe quota is zero.
  • the multimedia message service center further includes a network element service switching module connected to the processing module to be processed, where:
  • the response processing module is further configured to: when the number of successful probe response times of the peer network element in the abnormal state is equal to the initial value of the probe quota, determine that the peer network element returns all the probe requests sent successfully. In response, the peer network element is set to the normal state, and the corresponding detection quota is cleared. The peer network element that is set to the normal state and/or the peer network element that is notified by the timing module is sent to the network. Meta service switching module;
  • the NE service switching module is configured as: a standby pair corresponding to the primary peer NE that determines the abnormal status When the state of the end network element is normal, the service of the primary peer network element is switched to the standby peer network element. If the peer network element with the normal status is the primary peer network element, the corresponding standby pair will run. The service on the end NE is switched back to the primary peer NE.
  • the present invention provides a method for implementing network element service switching in a multimedia message service, which involves a multimedia message service center and a peer network element, and the method includes:
  • the multimedia message service center sends a request to the peer network element to wait for the response of the peer network element.
  • the peer network element After receiving the request sent by the multimedia message service center, the peer network element returns a response to the multimedia message service center according to the state of the network element. If the status of the NE is normal, the response is successful. If the status of the NE is abnormal, the response is returned.
  • the method also includes:
  • the multimedia message service center analyzes the status of each peer network element according to the success or failure response statistics of each peer network element received at a certain time, as the basis for switching the network element service.
  • the peer network element includes the primary peer network element and the standby peer network element, where:
  • the primary and secondary NEs carry services when the status is normal.
  • the standby peer NEs temporarily assume services when the status of the primary and secondary NEs is abnormal.
  • multiple peer NEs are the primary and secondary peers. Network element.
  • the multimedia message service center analyzes the status of each peer network element according to the received success or failure response statistics of each peer network element received at a time.
  • the steps of whether to switch the network element service include: Multimedia Messaging Service Center,
  • the number of successful response times of the peer network element is accumulated; and the peers are counted according to the number of successful responses and the number of times of requesting the delivery in the granularity of the timed time. If the service success rate of the network element is lower than the preset threshold, the corresponding peer network element is set to the abnormal state. The status of the peer network element is determined according to whether the state of the peer network element is normal or not. The network element or the standby peer network element sends a request.
  • the service of the primary peer network element is switched to the standby peer network element when the state of the secondary peer network element of the primary peer network element that is in the abnormal state is normal.
  • the method further includes: a multimedia message service center When the number of successful responses is accumulated, the number of successful probe response times of the peer network element that has been in an abnormal state and returns a successful response to the probe request is accumulated, and the peer network element that has been in an abnormal state and returns a failure response for the probe request is accumulated.
  • the corresponding probe quota is cleared;
  • the number of successful response times of the peer network element and the number of times the request is delivered are also reset, and the peer network element that has been set to the abnormal state in the previous time granularity is allocated.
  • the probe quota set to the initial value.
  • the multimedia message service center sends a request to the primary peer network element or the standby peer network element according to whether the status of the peer network element is normal or not, which means:
  • the request is sent to the primary peer NE. If the status of the primary and secondary NEs is abnormal and there is no quota, the request is sent to the status or The standby peer network element with the abnormal status but with the detection quota; the corresponding detection quota of the primary peer network element and/or the standby peer network element with the abnormality of the sent request but the detection quota is subtracted by one, and the corresponding The request identifier is a probe request; the probe quota means that the allocated probe quota is not zero, and the no probe quota means that the probe quota has not been allocated or the allocated probe quota is zero.
  • the method also includes:
  • the multimedia message service center determines that the peer network element returns a successful response to all the probe requests sent, and then The peer network element is reset to a normal state;
  • the service running on the corresponding standby peer network element is switched back to the primary peer network element.
  • the system and method of the present invention can automatically detect that the primary peer network element fails to be switched to the standby peer network element after the failure of the primary peer network element in time; and, in time, can automatically detect that the primary peer end network element returns to normal and then automatically complete the service back. Cut operation.
  • the whole process of the method of the present invention is automatically completed, and no manual intervention is required, which can ensure that the multimedia message service still has a high success rate in the event of a sudden failure of the primary-to-end network element.
  • FIG. 1 is a schematic structural diagram of a system for implementing network element service switching according to the present invention
  • FIG. 2 is a schematic structural diagram of an embodiment of an apparatus for switching network element services in an MMSC shown in FIG.
  • FIG. 4 is a flowchart of timing time granularity to processing in an embodiment of a method for implementing network element service switching according to the present invention
  • FIG. 5 is a flowchart of a process of sending a request in an embodiment of a method for implementing network element service switching according to the present invention
  • FIG. 6 is a process for receiving a response in an embodiment of a method for implementing network element service switching according to the present invention
  • FIG. 1 The structure of the system for implementing network element service switching according to the present invention is as shown in FIG. 1 , which includes an MMSC and a peer network element, where:
  • the MMSC is configured to send a request to the peer network element, and wait for the response of the peer network element.
  • the peer network element is configured to return a success response to the MMSC if the status of the network element is normal after receiving the MMSC request, and otherwise return a failure response to the MMSC.
  • the MMSC sends a request to the peer network element, and analyzes the running status of the peer network element according to the response of the received peer network element at intervals.
  • the running state of the peer network element is analyzed according to the received response statistics of the peer network element in the time granularity.
  • the peer network element includes the primary peer network element and the standby peer network element.
  • the primary peer network element carries the service; when an abnormality occurs, the secondary peer network element temporarily assumes the service.
  • multiple peer NEs can be used as the primary and backup NEs.
  • the MMSC is responsible for storing and forwarding multimedia service messages, receiving multimedia service messages submitted by users, value-added service platforms (VASPs) or other MMSCs, and then authenticating through DSMP network elements, or querying user-affiliated MMSC information through ENUM DNS. Or issue a notice And the user delivers the message to the SMSC.
  • the peer network element includes one or more of DSMP, ENUM DNS, and SMSC.
  • the number of requests is sent, and the request message sent by each peer network element is counted, which is used to calculate the success rate of the request response within the time granularity.
  • the number of successful responses is counted for the successful response of the request message sent by each peer network element, and used to count the success rate of the request response within the granularity of the time granularity.
  • the detection quota is used to detect whether the peer NE recovers from normal.
  • the initial value is preset by the system.
  • the number of successes of the probe response is counted, and the success response of the probe request message sent by each peer network element is counted, which is used to count the success rate of the probe request response within the time granularity.
  • the probe quota is allocated to the peer.
  • the service is still sent to the peer, and the service is identified as a probe message.
  • the probe quota is decremented by one.
  • the probe quota is set to zero and the probe is stopped. If the probe message is successfully received, the probe message success count is incremented by 1. The number of successes of the message is equal to the initial value of the probe quota. If all the probe messages are successful, the network element of the peer is restored to normal.
  • the service message that should be sent to the peer network element is directly sent to the peer network element.
  • An abnormal state when it is known by the statistical analysis that the peer network element is in an abnormal state, if a service message is sent to the peer network element, the service message is sent to the opposite network element when it is determined that the detection quota is available; Otherwise, check whether the standby peer NE is available, that is, if the standby peer NE is in the normal state or in the abnormal state but has the probe quota, if available, send the service message to the standby peer NE. If not available, the service message is still sent to the primary peer NE.
  • the structure of the network element service switching device in the MMSC is as shown in FIG. 2, which includes a response processing module, a timing module, and a request sending module, which are sequentially connected, where:
  • the timing module is configured to calculate the success rate of the request response of each peer network element in the preset timing time granularity, and reset the number of successful response times and the number of times the request is sent by each peer network element; When the value is lower than the preset threshold, the peer NE status is set to abnormal, and the requesting module and the response processing module are respectively notified to the peer network element that has been set to the abnormal state in the previous time granularity. Detecting the quota; The timing module counts the success rate of the request response of each peer network element within the granularity of the timing, which is equal to the number of successful responses/number of requests sent.
  • the requesting module is configured to send a request message 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 or not;
  • the requesting module sends a request message to the primary peer NE when the primary peer NE status is normal or the status is abnormal but there is a probe quota.
  • the request message is sent.
  • the backup peer network element that is in the normal state or the state is abnormal but has the detection quota; the detection quota of the primary peer network element and/or the standby peer network element whose status of the request message is abnormal but has the detection quota is reduced. Go to 1 and identify the corresponding request message as the probe request; accumulate the number of times the request is sent by the peer network element that sent the request message.
  • Determine whether the peer NE has a probe quota For example, determine whether the probe quota of the peer NE is greater than zero.
  • the probe quota When the probe quota is not allocated, the value of the probe quota is a negative integer; 2) When the probe quota is allocated, the initial value of the probe quota is a positive integer greater than zero; 3) determining whether the peer network element has a probe When the quota is used, it is determined whether the probe quota of the peer network element is an integer equal to zero or less than zero.
  • the requesting module sends the request message to the primary peer NE when the status of the standby peer NE is abnormal and there is no probe quota.
  • the response processing module is configured to be connected to the requesting sending module, and configured to collect, according to the received response message returned by each peer network element, the number of successful response times of the peer network element;
  • the peer NE that detects the failure of the message is cleared, and its probe quota is cleared, and the probe is stopped. If the peer NE that has been in the abnormal state and all the probe messages are returned successfully, the peer NE is set to the normal state. At the same time, the clearing detection quota and the peer network element that is set to the normal state are notified to the requesting delivery module.
  • the network element service switching apparatus embodiment shown in FIG. 2 further includes a network element service switching module connected to the response processing module, where:
  • the response processing module forwards the peer network element of the abnormal state notified by the peer network element and/or the timing module that is set to the normal state to the network element service switching module;
  • the network element service switching module is configured to switch the service of the primary peer end network element to the standby peer network element when the status of the standby peer network element corresponding to the primary peer network element in the abnormal state is normal; If the peer NE that is in the normal state is the master peer NE, the service running on the corresponding standby peer NE is switched back to the peer NE.
  • the present invention is directed to the foregoing system embodiment, and correspondingly provides a method for implementing network element service switching.
  • the process is as shown in FIG. 3, and includes the following steps:
  • the MMSC sends a request to the peer network element, and waits for the response of the peer network element.
  • the peer NE After receiving the MMSC request, the peer NE returns a success or failure response according to the status of the NE.
  • the peer network element includes the primary peer network element and the standby peer network element.
  • the primary peer network element bears the service; when it is abnormal, the secondary peer network element temporarily assumes the service.
  • multiple peer NEs can be used as the primary and backup NEs.
  • the MMSC analyzes the running status of the peer network element according to the statistics of the response of the peer network element at a time, as the basis for switching the network element service.
  • the running state of the peer network element is statistically analyzed within the timing time granularity.
  • the MMSC When the MMSC sends a request to the peer network element, it accumulates the number of times the request is sent by the peer network element; when receiving the response returned by the peer network element, the number of successful response times of the peer network element is accumulated; The success rate of the request response of each peer network is calculated in the granularity, which is equal to the number of successful responses/requested times.
  • the service success rate is lower than the preset threshold, the corresponding peer NE status is set to If the status of the standby peer NE is normal, the service of the primary peer is switched to the standby peer.
  • the processing flow which is the timing granularity (for example, 1 minute) achieved by a timer created by the MMSC during system initialization.
  • the timer preset time expires, indicating that the new timing time granularity starts, the following steps are included:
  • the peer network element is set to a state abnormality to suspend sending a service to the peer end;
  • the process of determining the delivery object of the request message includes the following steps:
  • step 502 Determine whether the status of the primary peer network element is normal. If yes, go to step 503. Otherwise, go to step
  • the request message is sent to the primary peer network element, and the number of requests corresponding to the primary peer network element is accumulated;
  • step 504 Determine whether the primary peer network element has a probe quota, if yes, go to step 505, otherwise go to step 506;
  • the primary peer network element determines whether the primary peer network element has a detection quota, for example, determining the primary peer network element Determine if the quota is greater than zero.
  • step 505 The request message is identified as a probe message, and the corresponding probe quota is decreased by 1; step 503 is performed;
  • step 506 Determine whether the status of the standby peer network element is normal, if yes, go to step 507, otherwise go to step 508;
  • the request message is sent to the standby peer network element, and the number of times the request is delivered by the standby peer network element is accumulated;
  • step 508 Determine whether the standby network element has a detection quota, if yes, go to step 509; otherwise, go to step 503;
  • the standby peer network element determines whether the standby peer network element has a detection quota, for example, whether the value of the detection quota of the standby peer network element is an integer greater than zero.
  • an operation procedure of the MMSC to perform state switching of the peer network element according to the received peer network element response message includes the following steps:
  • step 602 Determine whether it is a successful response, if yes, go to step 603, otherwise go to step 608;
  • step 604 Determine whether the response message corresponds to a probe request, if yes, execute step 605; otherwise, end the process;
  • step 606 Determine whether all the probe messages corresponding to the peer network element are successfully responded, that is, whether the corresponding number of successful probe response success times is the same as the initial value of the probe quota, if yes, step 607 is performed, otherwise the process ends;
  • All the probe messages return a successful response, indicating that the peer NE has been restored to normal state, and the service is normal.
  • the service can be switched back from its standby NE.
  • 607 The peer network element is set to a normal state, and the process ends.
  • 608 Determine whether the response message corresponds to a probe request, if yes, execute step 609, otherwise end the process;
  • the probe request message is used to detect whether the peer network element in the abnormal state returns to normal. If the failure response is returned corresponding to the probe request message, it indicates that the peer network element has not been restored. The detection continues to be meaningless, so the probe quota is cleared, that is, Stop detecting it within the time granularity.
  • the system and method of the present invention can automatically detect that the primary peer network element fails to be switched to the standby peer network element after the failure of the primary peer network element in time; and, in time, can automatically detect that the primary peer end network element returns to normal and then automatically complete the service back. Cut operation.
  • the whole process of the method of the present invention is automatically completed, and no manual intervention is required, which can ensure that the multimedia message service still has a high success rate in the event of a sudden failure of the primary-to-end network element.

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Abstract

本发明披露了一种多媒体消息业务中实现网元业务切换的系统，包括多媒体消息服务中心和对端网元；其中，多媒体消息服务中心，用于向对端网元发送请求，等待对端网元响应；对端网元，用于在接收到多媒体消息服务中心发送的请求后，根据本网元状态正常或异常向多媒体消息服务中心返回成功或失败响应。本发明通过MMSC能够及时探测到主对端网元出现故障后自动将业务切换到备用对端网元；并能够及时探测到主对端网元恢复正常后自动完成业务回切操作。本发明操作整个过程都是自动完成，无需人工干预，能保证多媒体消息业务在主对端网元出现突发故障时仍有较高的成功率。

Description

多媒体消息业务中实现网元业务切换的系统及方法
技术领域
本发明涉及多媒体消息业务（MMS, Multimedia Messaging Service )技 术， 尤其涉及 MMS中实现网元业务切换的系统及方法。
背景技术
多媒体消息业务是一种能够在手机和手机之间、 业务提供商和手机之间 以及手机和 Email服务器等其它应用之间传送多媒体内容的消息服务。 目前 多媒体消息业务已经得到了广泛的开展， 尤其是业务提供商为手机用户提供 的内容丰富、 及时快捷的服务， 丰富了用户的生活。
在多媒体消息业务流程中接收 MMSC发送的请求消息后返回响应消息 的网元， 统一称为对端网元， 主要包括数据业务管理平台 （DSMP , Data Service Management Platform ) 、 电话号码映射域名服务器（ENUM DNS, Domain Name System for storage of E.164 numbers ) 以及短消息服务中心 ( SMSC, Short Message Service Center )等。
多媒体消息业务流程较为复杂， 对端网元诸多。 在业务流程中任何一个 对端网元出现故障都有可能对多媒体消息业务的成功率造成严重的影响。 一 般需要对此类网元（可称为主对端网元）设置备用对端网元， 后者用来临时 代替前者提供服务， 以防主对端网元出现故障造成业务中断的情况。
在多媒体消息业务流程中， 当主对端网元出现故障后， 多媒体消息服务 中心（ MMSC, Multimedia Messaging Service Center )如何能够尽快察觉到该 网元的故障状态， 并将业务切换到备用对端网元， 是保证业务不中断的较为 关键的问题； 同时， 因备用对端网元只用来临时提供服务， 因此如何能在主 对端网元恢复正常状态后将业务从备用对端网元切换回去， 也是需要考虑的 问题。 现有的多媒体消息业务流程中尚未对此给出一个完好的解决方案。
发明内容 本发明所要解决的技术问题是提供一种多媒体消息业务中实现网元业务 切换的系统及方法， 能够自动探测到对端网元的故障状态而及时进行业务切 换。
为了解决上述技术问题， 本发明提供了一种多媒体消息业务中实现网元 业务切换的系统， 包括多媒体消息服务中心和对端网元， 其中：
多媒体消息服务中心设置为： 向对端网元发送请求， 等待对端网元响应； 对端网元设置为： 在接收到多媒体消息服务中心发送的请求后， 根据本 网元状态向多媒体消息服务中心返回响应， 若本网元状态正常， 则返回成功 响应， 若本网元状态异常， 则返回失败响应。
多媒体消息服务中心还设置为： 每隔一段时间根据收到对端网元的响应 统计分析对端网元的状态， 作为是否切换网元业务的依据。
对端网元包括主对端网元以及备用对端网元， 其中：
主对端网元设置为： 在状态正常时承载业务；
备用对端网元设置为： 在主对端网元出现状态异常时临时承担业务； 或者， 多个对端网元互为主对端网元和备用对端网元。
多媒体消息服务中心包括依次连接的响应处理模块、 定时模块以及请求 下发模块， 其中：
响应处理模块设置为： 根据收到的每一对端网元返回的响应累计响应成 功次数；
定时模块设置为： 在预置的定时时间粒度内根据响应成功次数与请求下 发次数的商统计各对端网元的请求响应成功率； 当有统计的业务成功率低于 预设的阔值时， 将相应的对端网元状态置为异常， 并通知给请求下发模块； 请求下发模块设置为： 根据对端网元的状态正常与否决定向主对端网元 或向备用对端网元下发请求， 累计被下发请求的对端网元的请求下发次数。
定时模块还设置为： 在统计完所述各对端网元的请求响应成功率后， 复 位对端网元的响应成功次数和请求下发次数， 并为前一时间粒度下已置为状 态异常的对端网元分配预置为初始值的探测配额； 将状态置为异常的对端网 元通知给响应处理模块；
响应处理模块还与请求下发模块连接， 其还设置为： 在累计响应成功次 数的同时， 累计已处于异常状态且对于探测请求返回成功响应的对端网元的 探测响应成功次数； 将已处于异常状态且对于探测请求返回失败响应的对端 网元对应的探测配额清零；
请求下发模块是设置为： 在主对端网元状态正常或状态异常但有探测配 额时， 将请求下发给主对端网元； 在主对端网元状态异常且没有探测配额时， 将请求下发给状态正常或状态异常但有探测配额的备用对端网元； 将被发送 请求的状态异常但有探测配额的主对端网元和 /或备用对端网元相应的探测 配额减去 1 , 且将相应的请求标识为探测请求； 有探测配额是探测配额的值 不为零， 没有探测配额是指探测配额的值为零。 多媒体消息服务中心还包括与响应处理模块连接的网元业务切换模块， 其中：
响应处理模块还设置为： 在对处于异常状态的对端网元累计的所述探测 响应成功次数等于所述探测配额的初始值时， 判断该对端网元对于下发的所 有的探测请求都返回成功响应， 则将该对端网元置为状态正常， 同时将清零 对应的探测配额； 将置为正常状态的对端网元和 /或定时模块通知的状态异常 的对端网元转达给网元业务切换模块；
网元业务切换模块设置为： 在判断状态异常的主对端网元相应的备用对 端网元状态正常时， 将该主对端网元的业务切换到该备用对端网元上； 在判 断状态正常的对端网元为主对端网元， 则将运行在相应的备用对端网元上的 业务切回该主对端网元。
为了解决上述技术问题， 本发明提供了一种多媒体消息业务中实现网元 业务切换的多媒体消息服务中心， 包括依次连接的响应处理模块、 定时模块 以及请求下发模块， 其中：
响应处理模块设置为： 根据收到的每一对端网元针对下发请求返回的响 应累计响应成功次数； 定时模块设置为： 在预置的定时时间粒度内根据响应成功次数与请求下 发次数的商统计各对端网元的请求响应成功率； 当有统计的业务成功率低于 预设的阔值时， 将相应的对端网元状态置为异常， 并通知给请求下发模块； 请求下发模块设置为： 根据对端网元的状态正常与否决定向主对端网元 或向所述备用对端网元下发所述请求， 累计被下发所述请求的对端网元的请 求下发次数。
定时模块还设置为： 在统计完各对端网元的请求响应成功率后， 复位所 述对端网元的响应成功次数和请求下发次数， 并为前一时间粒度下已置为状 态异常的对端网元分配预置为初始值的探测配额； 将状态置为异常的所述对 端网元通知给所述响应处理模块；
响应处理模块还与所述请求下发模块连接， 其还设置为： 在累计响应成 功次数的同时， 累计已处于异常状态且对于探测请求返回成功响应的对端网 元的探测响应成功次数； 将已处于异常状态且对于探测请求返回失败响应的 对端网元对应的探测配额清零；
请求下发模块是设置为： 在主对端网元状态正常或状态异常但有探测配 额时， 将请求下发给主对端网元； 在主对端网元状态异常且没有探测配额时， 将请求下发给状态正常或状态异常但有探测配额的备用对端网元； 将被发送 请求的状态异常但有探测配额的主对端网元和 /或备用对端网元相应的探测 配额减 1 , 且将相应的请求标识为探测请求； 有探测配额是指探测配额的值 不为零， 没有探测配额是指探测配额的值为零。
该多媒体消息服务中心还包括与所应处理模块连接的网元业务切换模 块， 其中：
响应处理模块还设置为： 在对处于异常状态的对端网元累计的探测响应 成功次数等于探测配额的所述初始值时， 判断该对端网元对于下发的所有的 探测请求都返回成功响应， 则将该对端网元置为状态正常， 同时将清零对应 的探测配额； 将置为正常状态的对端网元和 /或定时模块通知的状态异常的对 端网元转达给网元业务切换模块；
网元业务切换模块设置为： 在判断状态异常的主对端网元相应的备用对 端网元状态正常时， 将该主对端网元的业务切换到该备用对端网元上； 在判 断状态正常的对端网元为主对端网元， 则将运行在相应的备用对端网元上的 业务切回该主对端网元。
为了解决上述技术问题， 本发明提供了一种多媒体消息业务中实现网元 业务切换的方法， 涉及多媒体消息服务中心和对端网元， 该方法包括：
多媒体消息服务中心向对端网元发送请求， 等待对端网元的响应； 对端网元在接收到多媒体消息服务中心发送的请求后， 根据本网元状态 向多媒体消息服务中心返回响应， 若本网元状态正常， 则返回成功响应， 若 本网元状态异常， 则返回失败响应。
该方法还包括：
多媒体消息服务中心每隔一段时间根据收到的每一对端网元的返回的成 功或失败响应统计分析每一对端网元的状态，作为是否切换网元业务的依据。
对端网元包括主对端网元和备用对端网元， 其中：
主对端网元在状态正常时承载业务， 备用对端网元在主对端网元出现状 态异常时临时承担业务； 或者， 多个对端网元互为主对端网元和备用对端网 元。
所述多媒体消息服务中心每隔一段时间根据收到的每一对端网元的返回 的成功或失败响应统计分析每一对端网元的状态， 作为是否切换网元业务的 依据的步骤包括： 多媒体消息服务中心，
在一预定的定时时间粒度内收到对端网元返回的响应时， 累计该对端网 元的响应成功次数； 在定时时间粒度内根据响应成功次数与请求下发次数的 商统计各对端网元的请求响应成功率； 当有统计的业务成功率低于预设的阔 值时， 将相应的对端网元置为状态异常； 根据对端网元的状态正常与否决定 向主对端网元或备用对端网元下发请求；
在判断状态置为异常的主对端网元相应的备用对端网元状态正常时， 将 该主对端网元的业务切换到该备用对端网元上。
所述方法还包括： 多媒体消息服务中心 在累计响应成功次数的同时， 还累计已处于异常状态且对于探测请求返 回成功响应的对端网元的探测响应成功次数， 并将已处于异常状态且对于探 测请求返回失败响应的对端网元对应的探测配额清零；
在统计完各对端网元的请求响应成功率后， 还复位对端网元的响应成功 次数和请求下发次数， 并为前一时间粒度下已置为状态异常的对端网元分配 预置为初始值的探测配额。
多媒体消息服务中心根据对端网元的状态正常与否决定向主对端网元或 所述备用对端网元下发请求， 是指：
在主对端网元状态正常或状态异常但有探测配额时， 将请求下发给主对 端网元； 在主对端网元状态异常且没有探测配额时， 将请求下发给状态正常 或状态异常但有探测配额的备用对端网元； 将被发送请求的状态异常但有探 测配额的主对端网元和 /或备用对端网元相应的探测配额减去一 , 且将相应的 请求标识为探测请求； 有探测配额是指分配的探测配额不为零， 没有探测配 额是指尚未分配探测配额或分配的探测配额为零。
该方法还包括：
多媒体消息服务中心对处于异常状态的对端网元累计的探测响应成功次 数等于探测配额的所述初始值时， 判断该对端网元对于下发的所有的探测请 求都返回成功响应， 则将该对端网元重置为状态正常；
当判断重置为状态正常的对端网元为主对端网元， 则将运行在相应的备 用对端网元上的业务切回该主对端网元。
本发明的系统及方法，通过 MMSC能够及时探测到主对端网元出现故障 后自动将业务切换到备用对端网元； 并且， 能够及时探测到主对端网元恢复 正常后自动完成业务回切操作。 本发明方法的整个过程都是自动完成， 无需 人工干预， 能够保证多媒体消息业务在主对端网元出现突发故障时仍有较高 的成功率。
附图概述 图 1为本发明的实现网元业务切换的系统实施例的结构示意图； 图 2为图 1所示的 MMSC内网元业务切换装置实施例的结构示意图； 图 3为本发明的实现网元业务切换的方法实施例的流程图；
图 4为本发明的实现网元业务切换的方法实施例中定时时间粒度到处理 流程图；
图 5 为本发明的实现网元业务切换的方法实施例中下发请求处理流程 图；
图 6 为本发明的实现网元业务切换的方法实施例中接收响应处理流程
本发明的较佳实施方式
以下结合附图和优选实施例来详细地说明本发明的技术方案。 以下例举 的实施例仅用于说明和解释本发明， 而不构成对本发明技术方案的限制。
本发明的实现网元业务切换的系统实施例的结构如图 1 所示， 包括 MMSC和对端网元， 其中：
MMSC, 用于向对端网元发送请求， 等待对端网元的响应；
对端网元， 用于在接收到 MMSC 的请求后， 如果本网元状态正常向 MMSC返回成功响应， 反之则向 MMSC返回失败响应。
MMSC向对端网元发送请求， 每隔一段时间根据收到的对端网元的响应 统计分析对端网元的运行状态， 作为是否切换网元业务的依据。 优选为在定 时时间粒度内根据收到的对端网元的响应统计分析对端网元的运行状态。
对端网元包括主对端网元以及备用对端网元。 一般而言， 由主对端网元 承载业务； 在其出现异常时， 由备用对端网元临时承担业务。 当然， 也可以 多个对端网元互为主、 备网元。
此外， MMSC负责多媒体业务消息的保存和转发， 接收由用户、 增值业 务平台 （ VASP )或其它 MMSC提交的多媒体业务消息， 然后通过 DSMP网 元进行鉴权， 或通过 ENUM DNS查询用户归属 MMSC信息， 或下发通告消 息和用户投递 ^艮告消息到 SMSC。 对端网元包括 DSMP , ENUM DNS以及 SMSC中的一种或多种。
在继续说明本发明的技术方案之前， 先将实现该技术方案用到的术语说 明如下：
请求下发次数， 对各个对端网元下发的请求消息进行计数， 用于统计定 时时间粒度内的请求响应成功率。
响应成功次数， 对各个对端网元下发请求消息的成功响应进行计数， 用 于统计定时时间粒度内的请求响应成功率。
探测配额， 用于探测对端网元是否恢复正常的参数， 其初始值由系统预 置。
探测响应成功次数， 对各个对端网元下发探测请求消息的成功响应进行 计数， 用于统计定时时间粒度内的探测请求响应成功率。
定时时间粒度开始计时的时候， 如果对端网元状态为异常状态， 则为其 分配探测配额。
当对端网元为异常状态， 但其探测配额不为零， 则仍然向其发送业务， 且将该条业务标识为探测消息， 每向其发送一次探测消息， 其探测配额减 1。
收到探测消息的失败响应后， 则认为对端网元仍然异常， 则将探测配额 置零， 停止对其探测； 收到探测消息的成功响应， 则将探测消息成功次数累 加 1 , 当该探测消息成功次数等于探测配额的初始值， 判断所有探测消息都 响应成功， 则认为该端网元恢复正常， 将该对端网元的状态置为正常。
正常状态， 当通过统计分析获知对端网元处于正常状态时， 所有应发向 该对端网元的业务消息直接发送到该对端网元。
异常状态， 当通过统计分析获知对端网元处于异常状态时， 如果有业务 消息应发向该对端网元， 则在判断其有探测配额时， 将业务消息发向此对端 网元； 否则需则检查其备用对端网元是否可用， 即其备用对端网元处于正常 状态或处于异常状态但有探测配额的情况下， 如果可用， 则将业务消息发向 该备用对端网元， 如果不可用， 则将业务消息仍然发向主对端网元。 MMSC中的网元业务切换装置实施例的结构如图 2所示， 包括依次连接 的响应处理模块、 定时模块以及请求下发模块， 其中：
定时模块， 用于在预置的定时时间粒度内， 统计各对端网元的请求响应 成功率， 并复位各对端网元的响应成功次数和请求下发次数； 在有统计的业 务成功率低于预设的阔值时， 将相应对端网元状态置为异常， 并分别通知给 请求下发模块和响应处理模块； 为前一时间粒度下已置为状态异常的对端网 元分配探测配额； 定时模块在定时时间粒度内统计各对端网元的请求响应成功率， 等于响 应成功次数 /请求下发次数。
请求下发模块， 用于根据对端网元的状态正常与否决定向主对端网元或 向备用对端网元发送请求消息；
请求下发模块在主对端网元状态正常或状态异常但有探测配额时， 将请 求消息下发给主对端网元； 在主对端网元状态异常且没有探测配额时， 将请 求消息下发给状态正常或状态异常但有探测配额的备用对端网元； 将被发送 请求消息的状态异常但有探测配额的主对端网元和 /或备用对端网元相应的 探测配额减去 1 , 且将相应的请求消息标识为探测请求； 累计被下发请求消 息的对端网元的请求下发次数。
判断对端网元是否有探测配额， 譬如判断该对端网元的探测配额是否大 于零。
譬如： 1 ) 未分配探测配额时， 该探测配额的值为负整数； 2 )分配探测配额 时， 该探测配额的初始值为一个大于零的正整数； 3 )判断对端网元是否有探 测配额时， 判断该对端网元的探测配额是否为等于零或小于零的整数。
请求下发模块在备用对端网元状态异常且没有探测配额时， 仍将求消息 下发给主对端网元。
响应处理模块， 与请求下发模块连接， 用于根据收到的每一对端网元返 回的响应消息统计该对端网元的响应成功次数； 对于已处于异常状态且返回 探测消息失败响应的对端网元， 将其探测配额清零， 并停止对其继续探测； 对于已处于异常状态且所有探测消息都返回成功的对端网元， 则将其置为正 常状态，同时将清零探测配额和置为正常状态的对端网元通知请求下发模块。
图 2所示的网元业务切换装置实施例还包括与响应处理模块连接的网元 业务切换模块， 其中：
响应处理模块将置为正常状态的对端网元和 /或定时模块通知的状态异 常的对端网元转达给网元业务切换模块；
网元业务切换模块， 用于在判断状态异常的主对端网元相应的备用对端 网元状态正常时， 将该主对端网元的业务切换到该备用对端网元上； 在判断 置为正常状态的对端网元为主对端网元， 则将运行在相应的备用对端网元上 的业务切回该主对端网元。
本发明针对上述系统实施例， 相应地还提供实现网元业务切换的方法实 施例， 其流程如图 3所示， 包括如下步骤：
310: MMSC向对端网元发送请求， 等待对端网元的响应；
320: 对端网元在接收到 MMSC请求后， 根据本网元的状态正常或异常 返回成功或失败响应。
对端网元包括主对端网元以及备用对端网元。 一般而言， 由主对端网元 承担业务； 在其出现异常时， 由备用对端网元临时承担业务。 当然， 也可以 多个对端网元互为主、 备网元。
图 3所示的流程还包括步骤：
330: MMSC每隔一段时间根据收到对端网元的响应统计分析对端网元 的运行状态， 作为是否切换网元业务的依据。
优选为在定时时间粒度内统计分析对端网元的运行状态。
具体地， 包括：
MMSC在向对端网元发送请求时， 累计该对端网元的请求下发次数； 在 收到对端网元返回的响应时， 累计该对端网元的响应成功次数； 在定时时间 粒度内统计各对端网元的请求响应成功率， 等于响应成功次数 /请求下发次 数； 当有统计的业务成功率低于预设的阔值时， 将相应的对端网元状态置为 异常； 在判断状态置为异常的主对端网元相应的备用对端网元状态正常时， 将该主对端网元的业务切换到该备用对端网元上。
的处理流程，它是通过 MMSC在系统初始化时创建的一个定时器实现的定时 时间粒度（如为 1分钟） 。 当定时器预置的定时时间到， 表示新的定时时间 粒度开始， 包括如下步骤：
401 : 统计上一时间粒度的各对端网元的请求响应成功率， 等于响应成功 次数 /请求下发次数；
402: 复位各对端网元的响应成功次数和请求下发次数（如清零）， 为状 态异常的对端网元分配预置为初始值的探测配额；
403: 判断对端网元的请求响应成功率是否小于设定阔值， 是则执行步骤 404, 否则结束流程；
404: 对该对端网元设置为状态异常， 以暂緩向其发送业务； 结束流程。
决定请求消息的下发对象的处理流程， 包括如下步骤：
501 : 收到要下发到对端网元的请求消息；
502: 判断主对端网元状态是否正常， 是则执行步骤 503 , 否则执行步骤
504;
503: 将请求消息向该主对端网元下发， 并且累计该主对端网元对应的请 求下发次数； 结束流程；
504: 判断该主对端网元是否有探测配额， 是则执行步骤 505 , 否则执行 步骤 506;
在此， 判断该主对端网元是否有探测配额， 譬如判断该主对端网元的探 测配额是否大于零。
505:将该请求消息标识为探测消息，对应的探测配额减 1 ;执行步骤 503 ;
506: 判断备用对端网元的状态是否正常， 是则执行步骤 507 , 否则执行 步骤 508;
507: 将该请求消息向该备用对端网元下发， 累计该备用对端网元对应的 请求下发次数； 结束流程；
508: 判断备用该对端网元是否有探测配额， 是则执行步骤 509 , 否则执 行步骤 503 ;
在此， 判断该备用对端网元是否有探测配额， 譬如判断该备用对端网元 的探测配额的值是否为大于零的整数。
509: 将该请求消息标识为探测消息， 将对应的探测配额减 1 ; 执行步骤
507。
如图 6所示，是本发明的上述方法实施例中 MMSC根据收到对端网元响 应消息进行对端网元状态切换的操作流程， 包括如下步骤：
601 : 收到对端网元对下发请求返回的响应消息；
602: 判断是否为成功响应， 是则执行步骤 603 , 否则执行步骤 608;
603 : 累计该对端网元对应的响应成功次数；
604: 判断该响应消息对应的是否为探测请求， 是则执行步骤 605 , 否则 结束流程；
605： 累计该对端网元对应的探测响应成功次数；
606: 判断该对端网元对应的所有探测消息是否都响应成功， 即该对应的 探测响应成功次数是否与探测配额初始值是否相同， 是则执行步骤 607 , 否 则结束流程；
所有探测消息都返回成功响应， 表示该对端网元已经恢复正常， 置其为 状态正常， 可以将业务从其备用网元切回。
607: 将该对端网元设为状态正常， 结束流程； 608: 判断该响应消息对应的是否为探测请求， 是则执行步骤 609, 否则 结束流程；
609： 将该对端网元对应的探测配额置为零， 结束流程。
通过探测请求消息探测处于异常状态的对端网元是否恢复正常， 如果对 应于探测请求消息返回失败响应， 表明对端网元仍未恢复， 继续探测已没有 意义， 所以探测配额清零， 即在时间粒度内停止对其探测。
以上所述仅是本发明的具体实施方式， 应当指出， 对于本技术领域的普 通技术人员来说， 在不脱离本发明原理的前提下， 还可以做出若干改进和润 饰， 这些改进和润饰也应视为本发明的保护范围。
工业实用性
本发明的系统及方法，通过 MMSC能够及时探测到主对端网元出现故障 后自动将业务切换到备用对端网元； 并且， 能够及时探测到主对端网元恢复 正常后自动完成业务回切操作。 本发明方法的整个过程都是自动完成， 无需 人工干预， 能够保证多媒体消息业务在主对端网元出现突发故障时仍有较高 的成功率。

Claims

权 利 要 求 书
1、 一种多媒体消息业务中实现网元业务切换的系统，其包括多媒体消 息服务中心和对端网元， 其中，
所述多媒体消息服务中心设置为： 向所述对端网元发送请求， 等待所述 对端网元响应；
所述对端网元设置为：在接收到所述多媒体消息服务中心发送的请求后， 根据本网元状态向所述多媒体消息服务中心返回响应， 若本网元状态正常， 则返回成功响应， 若本网元状态异常， 则返回失败响应。
2、 按照权利要求 1所述的系统， 其中，
所述多媒体消息服务中心还设置为： 每隔一段时间根据收到所述对端网 元的响应统计分析所述对端网元的状态， 作为是否切换网元业务的依据。
3、 按照权利要求 1或 2的系统，其中， 所述对端网元包括主对端网元 以及备用对端网元，
所述主对端网元设置为： 在状态正常时承载业务；
所述备用对端网元设置为： 在所述主对端网元出现状态异常时临时承担 业务；
或者， 多个对端网元互为所述主对端网元和所述备用对端网元。
4、 按照权利要求 2的系统，其中， 所述多媒体消息服务中心包括依次 连接的响应处理模块、 定时模块以及请求下发模块，
所述响应处理模块设置为： 根据收到的每一对端网元返回的响应累计响 应成功次数；
所述定时模块设置为： 在预置的定时时间粒度内根据所述响应成功次数 与请求下发次数的商统计各对端网元的请求响应成功率； 当有统计的业务成 功率低于预设的阔值时， 将相应的对端网元状态置为异常， 并通知给所述请 求下发模块；
所述请求下发模块设置为： 根据所述对端网元的状态正常与否决定向所 述主对端网元或向所述备用对端网元下发所述请求， 累计被下发所述请求的 对端网元的所述请求下发次数。
5、 按照权利要求 4的系统， 其中，
所述定时模块还设置为：在统计完所述各对端网元的请求响应成功率后， 复位所述对端网元的响应成功次数和请求下发次数， 并为前一时间粒度下已 置为状态异常的对端网元分配预置为初始值的探测配额； 将状态置为异常的 所述对端网元通知给所述响应处理模块；
所述响应处理模块还与所述请求下发模块连接， 其还设置为： 在累计所 述响应成功次数的同时， 累计已处于异常状态且对于探测请求返回成功响应 的对端网元的探测响应成功次数； 将已处于异常状态且对于探测请求返回失 败响应的对端网元对应的探测配额清零；
所述请求下发模块是设置为： 在所述主对端网元状态正常或状态异常但 有探测配额时， 将所述请求下发给主对端网元； 在所述主对端网元状态异常 且没有探测配额时， 将所述请求下发给状态正常或状态异常但有探测配额的 备用对端网元； 将被发送所述请求的状态异常但有探测配额的主对端网元和 / 或备用对端网元相应的探测配额减去 1 , 且将相应的请求标识为所述探测请 求； 所述有探测配额是所述探测配额的值不为零， 所述没有探测配额是指所 述探测配额的值为零。
6、 按照权利要求 5的系统，其中， 所述多媒体消息服务中心还包括与 所述响应处理模块连接的网元业务切换模块，
所述响应处理模块还设置为： 在对处于异常状态的对端网元累计的所述 探测响应成功次数等于所述探测配额的所述初始值时， 判断该对端网元对于 下发的所有的探测请求都返回成功响应， 则将该对端网元置为状态正常， 同 时将清零对应的探测配额； 将置为正常状态的对端网元和 /或所述定时模块通 知的状态异常的对端网元转达给网元业务切换模块；
所述网元业务切换模块设置为： 在判断状态异常的主对端网元相应的备 用对端网元状态正常时， 将该主对端网元的业务切换到该备用对端网元上； 在判断状态正常的对端网元为主对端网元， 则将运行在相应的备用对端网元 上的业务切回该主对端网元。
7、 一种多媒体消息业务中实现网元业务切换的多媒体消息服务中心， 其包括依次连接的响应处理模块、 定时模块以及请求下发模块， 其中：
所述响应处理模块设置为： 根据收到的每一对端网元针对下发请求返回 的响应累计响应成功次数；
所述定时模块设置为： 在预置的定时时间粒度内根据所述响应成功次数 与请求下发次数的商统计各对端网元的请求响应成功率； 当有统计的业务成 功率低于预设的阔值时， 将相应的对端网元状态置为异常， 并通知给所述请 求下发模块；
所述请求下发模块设置为： 根据所述对端网元的状态正常与否决定向所 述主对端网元或向所述备用对端网元下发所述请求， 累计被下发所述请求的 对端网元的所述请求下发次数。
8、 按照权利要求 7所述的多媒体消息服务中心， 其中，
所述定时模块还设置为：在统计完所述各对端网元的请求响应成功率后， 复位所述对端网元的响应成功次数和请求下发次数， 并为前一时间粒度下已 置为状态异常的对端网元分配预置为初始值的探测配额； 将状态置为异常的 所述对端网元通知给所述响应处理模块；
所述响应处理模块还与所述请求下发模块连接， 其还设置为： 在累计所 述响应成功次数的同时， 累计已处于异常状态且对于探测请求返回成功响应 的对端网元的探测响应成功次数； 将已处于异常状态且对于探测请求返回失 败响应的对端网元对应的探测配额清零；
所述请求下发模块是设置为： 在所述主对端网元状态正常或状态异常但 有探测配额时， 将所述请求下发给主对端网元； 在所述主对端网元状态异常 且没有探测配额时， 将所述请求下发给状态正常或状态异常但有探测配额的 备用对端网元； 将被发送所述请求的状态异常但有探测配额的主对端网元和 / 或备用对端网元相应的探测配额减 1 , 且将相应的请求标识为所述探测请求； 所述有探测配额是指所述探测配额的值不为零， 所述没有探测配额是指所述 探测配额的值为零。
9、 按照权利要求 8所述的多媒体消息服务中心，该多媒体消息服务中 心还包括与所述响应处理模块连接的网元业务切换模块， 其中： 所述响应处理模块还设置为： 在对处于异常状态的对端网元累计的所述 探测响应成功次数等于所述探测配额的所述初始值时， 判断该对端网元对于 下发的所有的探测请求都返回成功响应， 则将该对端网元置为状态正常， 同 时将清零对应的探测配额； 将置为正常状态的对端网元和 /或所述定时模块通 知的状态异常的对端网元转达给网元业务切换模块；
所述网元业务切换模块设置为： 在判断状态异常的主对端网元相应的备 用对端网元状态正常时， 将该主对端网元的业务切换到该备用对端网元上； 在判断状态正常的对端网元为主对端网元， 则将运行在相应的备用对端网元 上的业务切回该主对端网元。
10、 一种多媒体消息业务中实现网元业务切换的方法，涉及多媒体消息 月良务中心和对端网元， 该方法包括：
所述多媒体消息服务中心向所述对端网元发送请求， 等待对端网元的响 应；
所述对端网元在接收到所述多媒体消息服务中心发送的所述请求后， 根 据本网元状态向所述多媒体消息服务中心返回响应， 若本网元状态正常， 则 返回成功响应， 若本网元状态异常， 则返回失败响应。
11、 按照权利要求 10所述的方法， 该方法还包括：
所述多媒体消息服务中心每隔一段时间根据收到的每一对端网元的返回 的成功或失败响应统计分析每一对端网元的状态， 作为是否切换网元业务的 依据。
12、 按照权利要求 11的方法， 其中， 所述对端网元包括主对端网元和 备用对端网元，
所述主对端网元在状态正常时承载业务， 所述备用对端网元在所述主对 端网元出现状态异常时临时承担业务； 或者， 多个对端网元互为所述主对端 网元和所述备用对端网元。
13、 按照权利要求 12的方法， 其中， 所述多媒体消息服务中心每隔一 段时间根据收到的每一对端网元的返回的成功或失败响应统计分析每一对端 网元的状态， 作为是否切换网元业务的依据的步骤包括： 所述多媒体消息服 务中心，
在一预定的定时时间粒度内收到所述对端网元返回的响应时， 累计该对 端网元的响应成功次数； 在所述定时时间粒度内根据所述响应成功次数与所 述请求下发次数的商统计各对端网元的所述请求响应成功率； 当有统计的业 务成功率低于预设的阔值时， 将相应的对端网元置为状态异常； 根据所述对 端网元的状态正常与否决定向所述主对端网元或所述备用对端网元下发所述 请求；
在判断状态置为异常的主对端网元相应的备用对端网元状态正常时， 将 该主对端网元的业务切换到该备用对端网元上。
14、 按照权利要求 13的方法， 所述方法还包括： 所述多媒体消息服务 中心 在累计所述响应成功次数的同时， 还累计已处于异常状态且对于探测请 求返回成功响应的对端网元的探测响应成功次数， 并将已处于异常状态且对 于探测请求返回失败响应的对端网元对应的探测配额清零；
在统计完所述各对端网元的请求响应成功率后， 还复位所述对端网元的 响应成功次数和请求下发次数， 并为前一时间粒度下已置为状态异常的对端 网元分配预置为初始值的探测配额。
15、 按照权利要求 14的方法， 其中， 所述多媒体消息服务中心根据所 述对端网元的状态正常与否决定向所述主对端网元或所述备用对端网元下发 所述请求， 是指：
在所述主对端网元状态正常或状态异常但有探测配额时， 将所述请求下 发给主对端网元； 在所述主对端网元状态异常且没有探测配额时， 将所述请 求下发给状态正常或状态异常但有探测配额的备用对端网元； 将被发送请求 的状态异常但有探测配额的主对端网元和 /或备用对端网元相应的探测配额 减去一， 且将相应的请求标识为所述探测请求； 所述有探测配额是指分配的 探测配额不为零， 所述没有探测配额是指尚未分配探测配额或分配的探测配 额为零。
16、 按照权利要求 15的方法， 该方法还包括：
所述多媒体消息服务中心对处于异常状态的对端网元累计的所述探测响 应成功次数等于所述探测配额的所述初始值时， 判断该对端网元对于下发的 所有的探测请求都返回成功响应， 则将该对端网元重置为状态正常；
当判断重置为状态正常的对端网元为主对端网元， 则将运行在相应的备 用对端网元上的业务切回该主对端网元。
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