CN104010318A

CN104010318A - Service transmission method and device

Info

Publication number: CN104010318A
Application number: CN201310057669.XA
Authority: CN
Inventors: 陶烨; 叶进洲; 刘海洋; 孙晓姬; 孙晓
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-02-22
Filing date: 2013-02-22
Publication date: 2014-08-27
Anticipated expiration: 2033-02-22
Also published as: WO2014127637A1; CN104010318B

Abstract

The embodiment of the invention provides a service transmission method and device. The method includes the following steps: a mobility management entity (MME) receives a first abnormal detection result of a first switching network, wherein the first abnormal detection result is used for indicating the abnormity of the first switching network; the MME triggers at least part of UEs to initiate a tracking area update process according to the first abnormal detection result so as to enable at least part of services corresponding to the part of UEs are switched from the first switching network to the second switching network, wherein the first switching network is one of a circuit switching (CS) network and an internet protocol multimedia system (IMS) network, and the second switching network is the other of the CS network and the IMS network. The services are services which are supported by both of the CS network and the IMS network. The service transmission method and device are capable of avoiding or reducing service loss which is caused during a fault of one of the IMS network and the CS network.

Description

The method and apparatus of transport service

Technical field

The present invention relates to the communications field, especially relate to a kind of method and apparatus of transport service.

Background technology

In the past few years, once there is multiple viewpoint, technology and evolution path around LTE voice, and have four kinds of situations to become possible commercialization selection.

The first is circuit switching fall-back (Circuit Switched Fallback, CSFB) technology.LTE only provides data service, in the time initiating or accept audio call, falls back to circuit switching (Circuit Switching, CS) territory and processes.CSFB technology is suitable as IP multimedia system (IP Multimedia System, IMS) and disposes previous transition scheme; Or, can also be used to solve the audio call problem of LTE user terminal roaming scence, do not dispose IMS at access zone network, or in IMS roaming agreement situation about not yet applying, CSFB technology can provide speech business for the LTE user of roaming.

The second is that LTE is synchronizeed (Simultaneous Voice and LTE, the SVLTE) technology of supporting with voice network.User terminal is operated in LTE and CS mode simultaneously, and the former provides data service, and the latter provides speech business.The third is to adopt OTT(Over-the-top) technology, is realized by OTT technology by the speech business of LTE.The 4th kind is exactly voice (Voice Over LTE, the VoLTE) technology of base station LTE, and VoLTE is based on IMS.IMS, owing to supporting multiple access and abundant multimedia service, becomes the core net standard architecture in all-IP epoch.Experienced after in the past few years full-fledged, the main flow that nowadays IMS has become fixing speech field is selected, and is defined as the standard architecture of mobile voice by 3GPP, GSMA.

In above-mentioned several technical routes, only have IMS to provide the VoIP voice solution that QoS ensures based on LTE, can say, the VoLTE based on IMS is wireless and the inevitable outcome of core network technology development.

Generally speaking, telecom operation chamber of commerce phased deployment voice solution, CSFB and VoLTE scheme can coexist the longer time.CS network is ripe speech and short message communication network, and Business Processing (voice and short message service) is based on IMS network in VoLTE scheme, dispose after new mobility, IMS network generally needs a period of time could stable operation, therefore, at the VoLTE network design initial stage, abnormal if whole IMS network occurs, can cause traffic lost.

Summary of the invention

Embodiments of the invention provide a kind of method and apparatus of transport service, can avoid or reduce at IMS network or CS network occurring causing when abnormal traffic lost.

First aspect, provides a kind of method of transport service, comprising: Mobility Management Entity MME receives the first abnormality detection result of the first switching network, and it is abnormal that the first abnormality detection result is used to indicate the first switching network; MME is toggled to small part subscriber equipment initiating updating of tracking area process according to the first abnormality detection result, so that at least part of business corresponding to subscriber equipment switches to the second switching network by the first switching network at least partly, wherein the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, the second switching network is another in CS network and IMS network, and business is the business that CS network and IMS network are all supported.

In conjunction with first aspect, in the possible implementation of the first, if the first abnormality detection result is indicated the first switching network fault, subscriber equipment is the whole subscriber equipmenies under MME at least partly, business is whole business that CS network and IMS network are all supported at least partly, MME is toggled to small part subscriber equipment initiating updating of tracking area process according to the first abnormality detection result, so that at least part of business corresponding to subscriber equipment switches to the second switching network by the first switching network at least partly, comprising: the state that MME arranges the first switching network is unavailable or fault; MME notifies whole subscriber equipmenies again to initiate the first tracing section updating TAU process; After receiving the TAU process that whole subscriber equipmenies initiate again, MME sends a TAU to whole subscriber equipmenies and accepts message, wherein a TAU accepts message to be used to indicate the first switching network is unavailable or fault, at least part of business is switched to the second switching network.

In conjunction with the possible implementation of the first, in the possible implementation of the second, the method of first aspect also comprises: MME receives the second abnormality detection result of the first switching network, and the second abnormality detection result is used to indicate the first switching network and recovers from fault; The state that MME arranges the first switching network is available or recovers from fault; MME notifies whole subscriber equipmenies to initiate the 2nd TAU process; After receiving the 2nd TAU process of whole subscriber equipmenies initiations, MME sends the 2nd TAU to whole subscriber equipmenies and accepts message, the 2nd TAU accepts message to be used to indicate the first switching network is available or recovers from fault, at least part of business is switched back to the first switching network.

In conjunction with first aspect, in the third possible implementation, if the first abnormality detection result is indicated the first switching network overload, subscriber equipment is the certain customers' equipment under MME at least partly, business is the partial service that CS network and IMS network are all supported at least partly, MME is toggled to small part subscriber equipment initiating updating of tracking area process according to the first abnormality detection result, so that business switches to the second switching network by the first switching network at least partly, comprising: the state that MME arranges the first switching network is overload; MME registers to the first switching network and the second switching network according to the different subscriber equipment of default ratio setting; Certain customers' equipment corresponding to MME notification section business is initiated the first tracing section updating TAU process again; After receiving the TAU process that certain customers' equipment initiates again, MME sends a TAU to certain customers' equipment and accepts message, wherein a TAU accept message be used to indicate the first switching network be unavailable or overload, to partial service is switched to the second switching network, make different subscriber equipmenies proportionally adopt the first switching network or the second switching network transport service.

In conjunction with the third possible implementation, in the 4th kind of possible implementation, the method of first aspect also comprises: MME receives the second abnormality detection result of the first switching network, and the second abnormality detection result is used to indicate the first switching network and recovers from overload; The state that MME arranges the first switching network is overload recovery; MME arranges part subscriber equipment and registers to the first switching network; MME notification section subscriber equipment is initiated the 2nd TAU process; After receiving the 2nd TAU process of certain customers' equipment initiation, send the 2nd TAU to certain customers' equipment and accept message, the 2nd TAU accept message be used to indicate the first switching network be available or from overload recover, to partial service is switched back to the first switching network.

In first aspect or above-mentioned any possible implementation, in the 5th kind of possible implementation, Mobility Management Entity MME receives the first abnormality detection result of the first switching network, specifically comprise: MME receives the information notice request that attaching position register/home subscriber server HLR/HSS sends, and information notice request comprises the first abnormality detection result.

In first aspect or above-mentioned any possible implementation, in the 6th kind of possible implementation, the second switching network is CS network, the first switching network is IMS network, Mobility Management Entity MME receives the first abnormality detection result of the first switching network, specifically comprise: MME receives the more new bearer request that the public data network gateway P-GW in IMS network sends, and more new bearer request comprises the first abnormality detection result.

In first aspect or above-mentioned any possible implementation, in the 7th kind of possible implementation, the second switching network is IMS network, the first switching network is CS network, Mobility Management Entity MME receives the first abnormality detection result of the first switching network, specifically comprise: MME receives the information notice request that the media gateway MGW in CS network sends, and information notice request comprises the first abnormality detection result.

Second aspect, a kind of method of transport service is provided, comprise: the detection entity in the first switching network detects extremely to the first switching network, obtains the first abnormality detection result, it is abnormal that wherein the first abnormality detection result is used to indicate the first switching network; Detect entity and send the first abnormality detection result to Mobility Management Entity MME, so that MME is toggled to small part subscriber equipment initiating updating of tracking area process according to the first abnormality detection result, so that at least part of business corresponding to subscriber equipment switches to the second switching network from the first switching network at least partly, wherein the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, the second switching network is another in CS network and IMS network, and business is the business that CS network and IMS network are all supported.

In conjunction with second aspect, in the possible implementation of the first, detecting entity is attaching position register/home subscriber server HLR/HSS, detect entity and send the first abnormality detection result to MME, comprise: HLR/HSS sends information notice request to MME, and information notice request comprises the first abnormality detection result.

In conjunction with the possible implementation of the first of second aspect, in the possible implementation of the second, the method of second aspect also comprises: in the situation that determining the first switching network fault, the call routing that HLR/HSS is called subscriber by least part of subscriber equipment is to the second switching network.

In conjunction with the possible implementation of the first of second aspect, in the third possible implementation, the method for second aspect also comprises: HLR/HSS determines as at least part of subscriber equipment of called subscriber whether register according to the first switching network; HLR/HSS in the situation that being determined to small part subscriber equipment according to the second switching network registration or according to the first switching network registration, call routing to the second switching network using at least part of subscriber equipment as called subscriber.

In conjunction with the possible implementation of the first of second aspect, in the 4th kind of possible implementation, the method for second aspect also comprises: HLR/HSS determines as at least part of subscriber equipment of called subscriber whether register according to the first switching network; HLR/HSS in the situation that being determined to small part subscriber equipment according to the first switching network registration or not registering according to second network, call routing to the first switching network using at least part of subscriber equipment as called subscriber.

In conjunction with the possible implementation of the first of second aspect, in the 5th kind of possible implementation, the first switching network is IMS network, the second switching network is CS network, detecting entity is the public data network gateway P-GW in IMS network, detect entity and send the first abnormality detection result to Mobility Management Entity MME, comprise: P-GW sends more new bearer request by gateway S-GW to MME, more new bearer request comprises the first abnormality detection result, wherein detection entity extremely the detecting the first switching network in the first switching network, comprise: whether Session Border Controller SBC or Proxy Call Session Control Function P-CSCF entity in P-GW detection IMS network be abnormal, wherein at SBC or P-CSCF entity abnormal in the situation that, the first abnormality detection result indicates the first switching network abnormal.

In conjunction with the 6th kind of possible implementation of second aspect or second aspect, in the 7th kind of possible implementation, the method of second aspect also comprises: detect entity extremely detecting the first switching network, obtain the second abnormality detection result, wherein the second abnormality detection result is used to indicate the recovery from abnormal of the first switching network; Detect entity and send the second abnormality detection result to MME.

In conjunction with second aspect, in the 8th kind of possible implementation, the first switching network is CS network, the second switching network is IMS network, detecting entity is the media gateway MGW in CS network, detect entity and send the first abnormality detection result to Mobility Management Entity MME, comprising: MGW sends information notice request to MME, and information notice request comprises abnormality detection result.

The third aspect, provides a kind of method of transport service, the in the situation that of the first switching network fault or overload, and the notice of again initiating the first tracing section updating TAU process that subscriber equipment receiving mobility management entity MME sends; Subscriber equipment is initiated the first tracing section updating process according to notice; Subscriber equipment receives MME and accepts message according to a TAU of the first tracing section updating process transmission, wherein a TAU accepts message to be used to indicate the first switching network is unavailable or fault, to at least part of business is switched to the second switching network, the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, the second switching network is another in CS network and IMS network, and business is the business that CS network and IMS network are all supported.

In conjunction with the third aspect, in the possible implementation of the first, the method for the third aspect also comprises: subscriber equipment receives the notice of again initiating the second tracing section updating TAU process that MME sends; Subscriber equipment is initiated the second tracing section updating process according to the notice of again initiating the second tracing section updating TAU process; Subscriber equipment receives MME and accepts message according to the 2nd TAU of the second tracing section updating process transmission, wherein the 2nd TAU accept message be used to indicate the first switching network be available or from fault or overload recover, at least part of business is switched back to the first switching network.

Fourth aspect, provides a kind of method of transport service, comprising: whether the overload condition that detects IMS network exceedes default threshold value; Exceed default threshold value in the overload condition of IMS network, notice detects entity IMS network over loading, determines IMS network over loading to detect entity according to notice.

In conjunction with fourth aspect, in the possible implementation of the first, detecting entity is public data network gateway P-GW, and method is carried out by the Session Border Controller SBC in IMS network or Proxy Call Session Control Function P-CSCF entity.

In conjunction with fourth aspect, in the possible implementation of the second, detecting entity is attaching position register/home subscriber server HLR/HSS, and wherein method is carried out by the telecommunication voice application server in IMS network; Or method is carried out by the query call conversation control function I-CSCF in IMS network or service call conversation control function S-CSCF entity; Or method is carried out by HLR/HSS.

The 5th aspect, provides a kind of device for transport service, comprising: receiver module, and for receiving the first abnormality detection result of the first switching network, it is abnormal that the first abnormality detection result is used to indicate the first switching network; Handover module, be toggled to small part subscriber equipment initiating updating of tracking area process for the first abnormality detection result receiving according to receiver module, so that at least part of business corresponding to subscriber equipment switches to the second switching network by the first switching network at least partly, wherein the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, the second switching network is another in CS network and IMS network, and business is the business that CS network and IMS network are all supported.

In conjunction with the 5th aspect, in the possible implementation of the first, if the first abnormality detection result is indicated the first switching network fault, subscriber equipment is the whole subscriber equipmenies under MME at least partly, business is whole business that CS network and IMS network are all supported at least partly, the state that handover module arranges the first switching network is unavailable or fault, notify whole subscriber equipmenies again to initiate the first tracing section updating TAU process, and after receiving the TAU process that whole subscriber equipmenies initiate again, send a TAU to whole subscriber equipmenies and accept message, wherein a TAU accepts message to be used to indicate the first switching network is unavailable or fault, to whole business are switched to the second switching network.

In conjunction with the possible implementation of the first, in the possible implementation of the second, receiver module also receives the second abnormality detection result of the first switching network, and the second abnormality detection result is used to indicate the first switching network and recovers from fault; The state that handover module arranges the first switching network is available or recovers from fault, wherein installs and also comprises: sending module, for notifying whole subscriber equipmenies to initiate the 2nd TAU process; After receiver module receives the 2nd TAU process of whole subscriber equipmenies initiations, send the 2nd TAU to whole subscriber equipmenies and accept message, the 2nd TAU accepts message to be used to indicate the first switching network is available or recovers from fault, at least part of business is switched back to the first switching network.

In conjunction with the 5th aspect, in the third possible implementation, if the first abnormality detection result is indicated the first switching network overload, subscriber equipment is the certain customers' equipment under MME at least partly, business is the partial service that CS network and IMS network are all supported at least partly, the state that handover module arranges the first switching network is overload, and register to the first switching network and the second switching network according to the subscriber equipment that default ratio setting is different, notification section subscriber equipment is initiated the first tracing section updating TAU process again, after receiving the TAU process that certain customers' equipment initiates again, MME sends a TAU to certain customers' equipment and accepts message, wherein a TAU accept message be used to indicate the first switching network be unavailable or overload, to partial service is switched to the second switching network, make different subscriber equipmenies proportionally adopt the first switching network or the second switching network transport service.

In conjunction with the third possible implementation, in the 4th kind of possible implementation, receiver module also receives the second abnormality detection result of the first switching network, and the second abnormality detection result is used to indicate the first switching network and recovers from overload; The state that handover module arranges the first switching network is overload recovery; MME arranges part subscriber equipment and registers to the first switching network, wherein device also comprises: sending module, initiate the 2nd TAU process for notification section subscriber equipment, and after receiver module receives the 2nd TAU process of certain customers' equipment initiation, send the 2nd TAU to certain customers' equipment and accept message, the 2nd TAU accept message be used to indicate the first switching network be available or from overload recover, to partial service is switched back to the first switching network.

In the 5th aspect or above-mentioned any possible implementation, in the 5th kind of possible implementation, it is characterized in that, receiver module receives the information notice request that attaching position register/home subscriber server HLR/HSS sends, and information notice request comprises the first abnormality detection result.

In the 5th aspect or above-mentioned any possible implementation, in the 6th kind of possible implementation, the second switching network is CS network, the first switching network is IMS network, receiver module receives the more new bearer request that the public data network gateway P-GW in IMS network sends, and more new bearer request comprises the first abnormality detection result.

In the 5th aspect or above-mentioned any possible implementation, in the 7th kind of possible implementation, the second switching network is IMS network, the first switching network is CS network, receiver module receives the information notice request that the media gateway MGW in CS network sends, and information notice request comprises the first abnormality detection result.

The 6th aspect, provides a kind of device of transport service, comprising: detection module, for to extremely the detecting of the first switching network, obtain the first abnormality detection result, and it is abnormal that wherein the first abnormality detection result is used to indicate the first switching network; Sending module, for sending and detect that the first abnormality detection result detecting is toggled to small part subscriber equipment initiating updating of tracking area process to Mobility Management Entity MME, so that at least part of business corresponding to subscriber equipment switches to the second switching network from the first switching network at least partly, wherein the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, the second switching network is another in CS network and IMS network, and business is the business that CS network and IMS network are all supported.

In conjunction with the 6th aspect, in the possible implementation of the first, install as attaching position register/home subscriber server HLR/HSS, sending module sends information notice request to MME, and information notice request comprises the first abnormality detection result.

In conjunction with the possible implementation of the first of the 6th aspect, in the possible implementation of the second, the device of the 6th aspect also comprises: routing module, for in the situation that determining the first switching network fault, the call routing that is called subscriber by least part of subscriber equipment is to the second switching network.

In conjunction with the possible implementation of the first of the 6th aspect, in the third possible implementation, the device of the 6th aspect also comprises: determination module, whether register according to the first switching network for determining as at least part of subscriber equipment of called subscriber; Routing module, in the situation that being determined to small part subscriber equipment according to the second switching network registration or not registering according to the first switching network, call routing to the second switching network using at least part of subscriber equipment as called subscriber.

In conjunction with the possible implementation of the first of the 6th aspect, in the 4th kind of possible implementation, the device of the 6th aspect also comprises: determination module, whether register according to the first switching network for determining as at least part of subscriber equipment of called subscriber; Routing module, in the situation that being determined to small part subscriber equipment according to the first switching network registration or not registering according to second network, call routing to the first switching network using at least part of subscriber equipment as called subscriber.

In conjunction with the possible implementation of the first of the 6th aspect, in the 5th kind of possible implementation, the first switching network is IMS network, the second switching network is CS network, device is the public data network gateway P-GW in IMS network, sending module sends more new bearer request by gateway S-GW to MME, more new bearer request comprises the first abnormality detection result, whether Session Border Controller SBC or Proxy Call Session Control Function P-CSCF entity in detection module detection IMS network be abnormal, wherein at SBC or P-CSCF entity abnormal in the situation that, the first abnormality detection result indicates the first switching network abnormal.

In conjunction with the 6th kind of possible implementation of the 6th aspect or the 6th aspect, in the 7th kind of possible implementation, detection module is detecting the first switching network extremely also, obtain the second abnormality detection result, wherein the second abnormality detection result is used to indicate the recovery from abnormal of the first switching network; Detection module also sends the second abnormality detection result to MME.

In conjunction with the 6th aspect, in the 8th kind of possible implementation, the first switching network is CS network, the second switching network is IMS network, device is the media gateway MGW in CS network, and sending module is to MME transmission information notice request, and information notice request comprises the first abnormality detection result.

The 7th aspect, provides a kind of device of transport service, comprising: receiver module, and for the first switching network fault or the overload in the situation that, the notice of again initiating the first tracing section updating TAU process that receiving mobility management entity MME sends; Sending module, initiates the first tracing section updating process for the notice receiving according to receiver module; Receiver module is also accepted message for receiving MME according to a TAU of the first tracing section updating process transmission, wherein a TAU accepts message to be used to indicate the first switching network is unavailable or fault, to at least part of business is switched to the second switching network, the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, the second switching network is another in CS network and IMS network, and business is the business that CS network and IMS network are all supported.

In conjunction with the 7th aspect, in the possible implementation of the first, the notice of again initiating the second tracing section updating TAU process that receiver module also sends for receiving MME; Sending module is also for initiating the second tracing section updating process according to the notice of again initiating the second tracing section updating TAU process; Receiver module is also accepted message for receiving MME according to the 2nd TAU of the second tracing section updating process transmission, wherein the 2nd TAU accept message be used to indicate the first switching network be available or from fault or overload recover, at least part of business is switched back to the first switching network.

Eight aspect, provides a kind of device of transport service, comprising: whether detection module, exceed default threshold value for detection of the overload condition of IMS network; Notification module, for detecting that at detection module the overload condition of IMS network exceedes default threshold value, notice detects entity IMS network over loading, determines IMS network over loading to detect entity according to notice.

In conjunction with eight aspect, in the possible implementation of the first, detecting entity is public data network gateway P-GW, installs as the Session Border Controller SBC in IMS network or Proxy Call Session Control Function P-CSCF entity.

In conjunction with eight aspect, in the possible implementation of the second, detecting entity is attaching position register/home subscriber server HLR/HSS, and wherein device is the telecommunication voice application server in IMS network; Or, install as the query call conversation control function I-CSCF in IMS network or service call conversation control function S-CSCF entity; Or device is HLR/HSS.

Embodiments of the invention can be by Mobility Management Entity in the time detecting one of IMS network and CS network fault, by being toggled to small part subscriber equipment initiating updating of tracking area process again, corresponding at least part of subscriber equipment, IMS and the common business of supporting of CS are switched to another in IMS network and CS network and process, thereby avoid or reduced and in the time of one of IMS network and CS network fault, caused traffic lost.

Brief description of the drawings

In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, to the accompanying drawing of required use in the embodiment of the present invention be briefly described below, apparently, described accompanying drawing is only some embodiments of the present invention below, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the configuration diagram of the communication system 100 of one embodiment of the present of invention.

Fig. 2 is the indicative flowchart of the method for transport service according to an embodiment of the invention.

Fig. 3 is the indicative flowchart of the method for transport service according to another embodiment of the present invention.

Fig. 4 is the indicative flowchart of the method for transport service according to still another embodiment of the invention.

Fig. 5 is according to the indicative flowchart of the method for the transport service of an embodiment more of the present invention.

Fig. 6 is the indicative flowchart of the process of the transport service of one embodiment of the present of invention.

Fig. 7 is the indicative flowchart of the CSFB calling procedure of one of embodiments of the invention.

Fig. 8 is the indicative flowchart of the CSFB called flow of embodiments of the invention.

Fig. 9 is the indicative flowchart of the process of the transport service of another embodiment of the present invention.

Figure 10 is that VoLTE overload is processed the indicative flowchart of called flow according to VoLTE mode according to an embodiment of the invention.

Figure 11 is that VoLTE overload is processed the indicative flowchart of called flow according to VoLTE mode according to an embodiment of the invention.

Figure 12 is the indicative flowchart of the process of the transport service of another embodiment of the present invention.

Figure 13 is the indicative flowchart of the process of the transport service of another embodiment of the present invention.

Figure 14 is the structural representation of the device of transport service according to an embodiment of the invention.

Figure 15 is the structural representation of the device of transport service according to another embodiment of the present invention.

Figure 16 is the structural representation of the device of transport service according to still another embodiment of the invention.

Figure 17 is according to the structural representation of the device of the transport service of an embodiment more of the present invention.

Figure 18 is the structural representation of the device of transport service according to an embodiment of the invention.

Figure 19 is the structural representation of the device of transport service according to another embodiment of the present invention.

Figure 20 is the structural representation of the device of transport service according to still another embodiment of the invention.

Figure 21 is according to the structural representation of the device of the transport service of an embodiment more of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

Should understand, technical scheme of the present invention can be applied to various communication systems, for example: GSM(Global System of Mobile communication, global system for mobile telecommunications) system, CDMA(Code Division Multiple Access, code division multiple access) system, WCDMA(, Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)) system, GPRS(General Packet Radio Service, GPRS), LTE(Long Term Evolution, Long Term Evolution) system, LTE-A(Advanced long term evolution, advanced Long Term Evolution) system, UMTS(Universal Mobile Telecommunication System, universal mobile telecommunications system) etc., the embodiment of the present invention does not limit, but for convenience of description, the embodiment of the present invention will describe as an example of LTE network example.

The embodiment of the present invention can be for the wireless network of different standards.Radio Access Network can comprise different network elements in different systems.For example, in LTE and LTE-A, the network element of Radio Access Network comprises eNB(eNodeB, evolved base station), in WCDMA, the network element of Radio Access Network comprises RNC(Radio Network Controller, radio network controller) and NodeB, similarly, WiMax(Worldwide Interoperability for Microwave Access, worldwide interoperability for microwave access) etc. other wireless network also can use and the similar scheme of the embodiment of the present invention, just the correlation module in base station system may be different, the embodiment of the present invention does not limit, but for convenience of description, following embodiment will describe as an example of eNodeB example.

Will also be understood that, in embodiments of the present invention, subscriber equipment (UE, User Equipment) include but not limited to travelling carriage (MS, Mobile Station), mobile terminal (Mobile Terminal), mobile phone (Mobile Telephone), mobile phone (handset) and portable equipment (portable equipment) etc., this subscriber equipment can be through wireless access network (RAN, Radio Access Network) communicate with one or more core net, for example, subscriber equipment can be mobile phone (or being called " honeycomb " phone), there is the computer of radio communication function etc., subscriber equipment can also be portable, pocket, hand-hold type, built-in computer or vehicle-mounted mobile device.

For fear of due to CS network or IMS Network Abnormal (for example, fault or overload etc.) cause mobile service unavailable, or while avoiding IMS network that overload occurs, IMS starts flow-control mechanism and causes mobile service loss, in traditional C/S network, can adopt the schemes such as MSC pond (POOL) to realize superfluous calamity and the load sharing of MSC, and in IMS network, can adopt N+1 scheme and IMS pond scheme realize IMS in superfluous calamity and the load sharing of each network element.But, in the scheme that CSFB and VoLTE scheme can coexist, if configuring redundancy equipment separately in each network respectively can increase the cost of system.

Embodiments of the invention have proposed to realize the scheme of mutual superfluous calamity and load sharing between CS network and IMS network.

The communication system 100 of embodiments of the invention is the communication system of CSFB technology and VoLTE technology co-existence, wherein the network element of CS territory (or network) 160 can comprise (the Mobile Switch Center of mobile switching centre, MSC) 161 and MGW162, support CSFB function.The network element in IMS territory can comprise CSCF (Call Session Control Function, CSCF131), AS132, MGCF (Media Gateway Control Function, MGCF) 133, Session Border Controller (Session Border Controller, or proxy CSCF (Proxy-CSCF, P-CSCF) 134 SBC).EPC network 120 comprises MME121, S-GW(Serving Gateway, gateway)/P-GW122 and PCRF, support VoLTE function.In addition, communication system 140 can also comprise HLR/HSS140.LTE user terminal 110 can be according to CSFB mode to CS network registry, so that by business such as CS territory transferring voice and/or short messages, or can be according to VoLTE mode to IMS network registry, so that by business such as IMS territory transferring voice and/or short messages.

Fig. 2 is the indicative flowchart of the method for transport service according to an embodiment of the invention.The embodiment of Fig. 2 is realized by the MME of Fig. 1, comprises following content.

210, Mobility Management Entity MME receives the first abnormality detection result of the first switching network, and it is abnormal that the first abnormality detection result is used to indicate the first switching network.

According to embodiments of the invention, extremely can comprise the unusual condition such as fault or overload of switching network.Particularly, switching network fault can refer to that at least one network element failure of switching network causes whole switching network fault, thereby makes switching network that business can not be normally provided.Switching network overload can refer to that CPU usage, call successful rate, the QoS of some equipment of switching network survey etc. parameter and exceed normal scope, for example, exceeds default threshold value, thereby makes switching network that business can not be normally provided.

220, MME is toggled to small part subscriber equipment initiating updating of tracking area process according to the first abnormality detection result, so that at least part of business corresponding to subscriber equipment switches to the second switching network by the first switching network at least partly, wherein the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, the second switching network is another in CS network and IMS network, and business is the business that CS network and IMS network are all supported.

For example, at the IMS Network Abnormal that possesses VoLTE function (for example, fault or overload), thereby in the parafunctional situation of VoLTE, MME can receive from detecting entity the abnormality detection result of instruction IMS Network Abnormal, and by triggering UE again initiating updating of tracking area process by least part of business (for example, corresponding at least part of business of subscriber equipment) carry out Business Processing by IMS network and switch to by CS network and carry out Business Processing, adopt CSFB mode to process business from adopting VoLTE mode processing business to switch to.Otherwise, possessing the CS Network Abnormal of CSFB function, thereby in the parafunctional situation of CSFB, MME can receive the abnormality detection result of instruction CS Network Abnormal, and by triggering subscriber equipment again initiating updating of tracking area process by least part of business (for example, corresponding at least part of business of subscriber equipment) carry out Business Processing by CS network and switch to by IMS network and carry out Business Processing, adopt business VoLTE mode to process business from adopting CSFB mode finishing sector to switch to.

The business that CS network and IMS network are all supported can refer to equal voice (voice), video (video) and/or the short message service etc. that can support of the IMS network that possesses the CS network of CSFB function and possess VoIMS function.In the time of the first switching network fault, MME can switch to the second switching network by the corresponding business of the whole subscriber equipmenies under MME and process, in the time of the first switching network overload, MME can switch to the second switching network by business corresponding to certain customers' equipment under MME and process, and the business that retains other parts is processed at the first switching network.

According to embodiments of the invention, if the first abnormality detection result is indicated the first switching network fault, subscriber equipment is the whole subscriber equipmenies under MME at least partly, business is whole business that CS network and IMS network are all supported at least partly, wherein, in 220, the state that MME arranges the first switching network is unavailable or fault; MME notifies at least part of subscriber equipment again to initiate the first tracing section updating TAU process; After receiving the TAU process that at least part of subscriber equipment initiates again, MME sends a TAU at least part of subscriber equipment and accepts message, wherein a TAU accepts message to be used to indicate the first switching network is unavailable or fault, at least part of business is switched to the second switching network.

For example, a TAU accepts can comprise IMS voice instruction (IMS Voice over PS session supported Indication) cell of supporting based on PS session in message, and in the time of the first switching network fault, this cell can be set to False.

For example, MME can initiate TAU process again by following process notifying user equipment: 1) unique temporary mark (the Globally Unique Temporary Identity of the overall situation, GUTI) heavy assigning process, wherein in this notice, can carry new GUTI(New GUTI) and invalid TA list (TAList), TAU again initiated to trigger UE; (2) EPS attachment removal (detach) process, wherein this notice is carried reattachment request (re-attach required) instruction, again initiates TAU to trigger UE.

For example, there is the CS network and the equal support voice business of IMS network and/or the short message service that possess VoLTE function of CSFB function, break down as example with IMS network, MME, in the time that definite IMS network breaks down, notifies the whole subscriber equipmenies under its management again to initiate the first tracing section updating TAU process.Because the state of MME IMS network is set to unavailable or fault, therefore, all subscriber equipmenies will be in CSBF mode to CS network registry, thereby speech business and/or the short message service of the user by IMS network processes business originally under MME switched to the network processes by CS.Like this, the effect of superfluous calamity has been played in the failover of embodiments of the invention, has avoided in the time of IMS network failure owing to cannot providing speech business and/or short message service to cause traffic lost.

Alternatively, as another embodiment, the method for Fig. 2 also comprises: MME receives the second abnormality detection result of the first switching network, and the second abnormality detection result is used to indicate the first switching network and recovers from fault; The state that MME arranges the first switching network is available or recovers from fault; MME notifies whole subscriber equipmenies to initiate the 2nd TAU process; After receiving the 2nd TAU process of whole subscriber equipmenies initiations, MME sends the 2nd TAU to whole subscriber equipmenies and accepts message, the 2nd TAU accepts message to be used to indicate the first switching network is available or recovers from fault, at least part of business is switched back to the first switching network.

For example, the 2nd TAU accepts can comprise IMS voice instruction (IMS Voice over PS session supported Indication) cell of supporting based on PS session in message, and in the time of the first switching network fault recovery, this cell can be set to True.

For example, the equal support voice business of CS network and IMS network and/or short message service, break down and revert to example with IMS network, MME, in the time that definite IMS network breaks down recovery, notifies the whole subscriber equipmenies under its management again to initiate the first tracing section updating TAU process.Because MME is available or fault recovery by the state of the first switching network, therefore, all subscriber equipmenies can be in VoLTE mode to IMS network registry, thereby speech business and/or the short message service of the user by CS network processes business originally under MME switched to the network processes by IMS.In the time of the IMS of fault network disaster recovery, in time business is switched to like this to IMS network processes, thereby can adopt in time IMS network to provide high-quality business for user.

According to embodiments of the invention, if the first abnormality detection result is indicated the first switching network overload, subscriber equipment is the certain customers' equipment under MME at least partly, business is the partial service that CS network and IMS network are all supported at least partly, wherein, in 220, the state that MME arranges the first switching network is overload; MME registers to the first switching network and the second switching network according to the different subscriber equipment of default ratio setting; MME notification section subscriber equipment is initiated the first tracing section updating TAU process again; After receiving the TAU process that certain customers' equipment initiates again, MME sends a TAU to certain customers' equipment and accepts message, wherein a TAU accept message be used to indicate the first switching network be unavailable or overload, to partial service is switched to the second switching network, make different subscriber equipmenies proportionally adopt the first switching network or the second switching network transport service.

MME can arrange subscriber equipment with CSBF mode to CS network registry or in VoLTE mode to IMS network registry.

For example, occur that taking IMS network overload is as example, MME, in the time that overload appears in definite IMS network, can notify the certain customers' equipment under its management again to initiate the first tracing section updating TAU process.Because MME registers to the first switching network and the second switching network according to the different subscriber equipment of default ratio setting, be that MME arranges above-mentioned certain customers equipment and registers according to the second switching network, and another part subscriber equipment is still to the first switching network registration, therefore, above-mentioned certain customers equipment will be in CSBF mode to CS network registry, thereby speech business and/or the short message service of the certain customers by IMS network processes business originally under MME switched to the network processes by CS.While there is overload due to the first switching network, MME can will originally switch to the second switching network by a part of subscriber equipment of the first switching network transport service, thereby had played the effect of load sharing, had avoided because IMS overload causes traffic lost.

Alternatively, as another embodiment, the method for Fig. 2 also comprises: MME receives the second abnormality detection result of the first switching network, and the second abnormality detection result is used to indicate the first switching network and recovers from overload; The state that MME arranges the first switching network is overload recovery; MME arranges part subscriber equipment and registers to the first switching network; MME notification section subscriber equipment is initiated the 2nd TAU process; After receiving the 2nd TAU process of certain customers' equipment initiation, send the 2nd TAU to certain customers' equipment and accept message, the 2nd TAU accept message be used to indicate the first switching network be available or from overload recover, to partial service is switched back to the first switching network.

For example, the equal support voice business of CS network and IMS network and/or short message service, occur that with IMS network overload reverts to example, MME, in the time that definite IMS network occurs that overload is recovered, notifies the whole subscriber equipmenies under its management again to initiate the first tracing section updating TAU process.Because MME is available or overload recovery by the state of the first switching network, therefore, all subscriber equipmenies will be in VoLTE mode to IMS network registry, thereby speech business and/or the short message service of the user by CS network processes business originally under MME switched to the network processes by IMS.In the time of the IMS of fault network disaster recovery, in time business is switched to like this to IMS network processes, thereby can adopt in time IMS network to provide high-quality business for user.

According to embodiments of the invention, in 210, MME receives the information notice request that attaching position register/home subscriber server HLR/HSS sends, and information notice request comprises the first abnormality detection result.

For example, information notice request can be the Info-Notify-Reqeust message of expansion, wherein carry IMS network state cell or network C S state cell, be used to indicate the abnormality detection result such as switching network fault (failure), fault recovery (recovery), overload (overload), overload recovery (resume).Alternatively, MME can also be to HLR/HSS return information push-notification-answer.For example, this information push-notification-answer can be the Info-Notify-Answer message of expansion.Info-Notify-Reqeust message and Info-Notify-Answer message can send by S6a/S6d interface.

According to embodiments of the invention, the second switching network is CS network, and the first switching network is IMS network, wherein in 210, MME receives the more new bearer request that the public data network gateway P-GW in IMS network sends, and more new bearer request comprises the first abnormality detection result.

For example, the UPDATE BEARER Request message of the expansion that the public data network gateway P-GW in MME reception IMS network sends by S-GW, Private Extension in the UPDATE BEARER Request message of this expansion (for example comprises switching network fault, IMS Failure or CS Failure) instruction or switching network overload (for example, IMS Overload) instruction.P-GW can send to S-GW by the UPDATE BEARER Request message of this expansion by S5/S8 interface, and S-GW can send to MME by the UPDATE BEARER Request message of expansion by S11 interface.

According to embodiments of the invention, the second switching network is IMS network, and the first switching network is CS network, and wherein, in 210, MME receives the information notice request that the media gateway MGW in CS network sends, and information notice request comprises the first abnormality detection result.

Fig. 3 is the indicative flowchart of the method for transport service according to another embodiment of the present invention.The embodiment of Fig. 3 is carried out by P-GW or the HLR/HSS of Fig. 1, corresponding with the embodiment of Fig. 2, does not repeat them here.

Detection entity in 310, the first switching networks detects extremely to the first switching network, obtains the first abnormality detection result, and it is abnormal that wherein the first abnormality detection result is used to indicate the first switching network.

320, detect entity and send the first abnormality detection result to Mobility Management Entity MME, so that MME is toggled to small part subscriber equipment initiating updating of tracking area process according to the first abnormality detection result, so that at least part of business corresponding to subscriber equipment switches to the second switching network from the first switching network at least partly, wherein the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, the second switching network is another in CS network and IMS network, and business is the business that CS network and IMS network are all supported.

According to embodiments of the invention, detecting entity is attaching position register/home subscriber server HLR/HSS, and in 320, HLR/HSS sends information notice request to MME, and information notice request comprises the first abnormality detection result.

Alternatively, as another embodiment, the method for Fig. 3 also comprises: in the situation that determining the first switching network fault, the call routing that HLR/HSS is called subscriber by least part of subscriber equipment is to the second switching network.

Alternatively, as another embodiment, the method for Fig. 3 also comprises: HLR/HSS determines as at least part of subscriber equipment of called subscriber whether register according to the first switching network; HLR/HSS in the situation that being determined to small part subscriber equipment according to the second switching network registration or according to the first switching network registration, call routing to the second switching network using at least part of subscriber equipment as called subscriber.

Alternatively, as another embodiment, the method for Fig. 3 also comprises: HLR/HSS determines as at least part of subscriber equipment of called subscriber whether register according to the first switching network; HLR/HSS in the situation that being determined to small part subscriber equipment according to the first switching network registration or not registering according to second network, call routing to the first switching network using at least part of subscriber equipment as called subscriber.

According to embodiments of the invention, the first switching network is IMS network, the second switching network is CS network, detecting entity is the public data network gateway P-GW in IMS network, in 320, P-GW sends more new bearer request by gateway S-GW to MME, more new bearer request comprises the first abnormality detection result, wherein, in 330, whether Session Border Controller SBC or Proxy Call Session Control Function P-CSCF entity in P-GW detection IMS network be abnormal, wherein at SBC or P-CSCF entity abnormal in the situation that, the first abnormality detection result indicates the first switching network abnormal.

For example, P-GW intercepts and carries after the middle P-CSCF entity of IMS network or the abnormal SIPINFO message of SBC, resolve this message, judge SBC (P-CSCF) overload, and at S5/S8 interface (the Update bearer Request) message by more new bearer request expansion by IMS overload notification to S-GW.

Alternatively, as another embodiment, also comprise: the method for Fig. 3 also comprises: detection entity detects extremely to the first switching network, obtains the second abnormality detection result, and wherein the second abnormality detection result is used to indicate the recovery from abnormal of the first switching network; Detect entity and send the second abnormality detection result to MME.

Embodiments of the invention, the first switching network is CS network, and the second switching network is IMS network, and detecting entity is the media gateway MGW in CS network, and in 320, MGW sends information notice request to MME, and information notice request comprises the first abnormality detection result.

Fig. 4 is the indicative flowchart of the method for transport service according to still another embodiment of the invention.The embodiment of Fig. 4 is carried out by the subscriber equipment of Fig. 1, corresponding with the embodiment of Fig. 2, does not repeat them here.

410, the in the situation that of the first switching network fault or overload, the notice of again initiating the first tracing section updating TAU process that subscriber equipment receiving mobility management entity MME sends.

420, subscriber equipment is initiated the first tracing section updating process according to notice.

430, subscriber equipment receives MME and accepts message according to a TAU of the first tracing section updating process transmission, wherein a TAU accepts message to be used to indicate the first switching network is unavailable or fault, to at least part of business is switched to the second switching network, the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, the second switching network is another in CS network and IMS network, and business is the business that CS network and IMS network are all supported.

Alternatively, as another embodiment, the method for Fig. 4 also comprises: subscriber equipment receives the notice of again initiating the second tracing section updating TAU process that MME sends; Subscriber equipment is initiated the second tracing section updating process according to the notice of again initiating the second tracing section updating TAU process; Subscriber equipment receives MME and accepts message according to the 2nd TAU of the second tracing section updating process transmission, wherein the 2nd TAU accept message be used to indicate the first switching network be available or from fault or overload recover, at least part of business is switched back to the first switching network.

Fig. 5 is according to the indicative flowchart of the method for the transport service of an embodiment more of the present invention.The embodiment of Fig. 5 is carried out by SBC, P-CSCF, S-CSCF or the I-CSCF of Fig. 1, corresponding with the method for Fig. 2 and Fig. 3, does not repeat them here.

510, whether the overload condition that detects IMS network exceedes default threshold value.

520, exceed default threshold value in the overload condition of IMS network, notice detects entity IMS network over loading, determines IMS network over loading to detect entity according to notice.

For example, certain entity in IMS network, by detecting at least one in its CPU usage, call successful rate, QoS detection etc. parameter, judges whether IMS transships, and judged result is notified to detecting entity by expansion interface.The method that judges overload of embodiments of the invention can comprise: whether the CPU usage that 1) judges this entity exceedes certain threshold values, determines IMS overload in the situation that CPU usage exceedes certain threshold value; 2) by monitoring VoLTE call successful rate, can add up and whether obtain VoLTE call successful rate lower than certain threshold values, determine IMS overload at VoLTE call successful rate lower than certain threshold values in the situation that.

Embodiments of the invention, Mobility Management Entity is in the time one of IMS network and CS network fault being detected, can be by being toggled to small part subscriber equipment initiating updating of tracking area process again, common to IMS and CS at least part of business of supporting is switched to another in IMS network and CS network and processes, thereby avoid or reduced and in the time of one of IMS network and CS network fault, caused traffic lost.

According to embodiments of the invention, detecting entity is public data network gateway P-GW, and the method for Fig. 5 is carried out by the Session Border Controller SBC in IMS network or Proxy Call Session Control Function P-CSCF entity.

For example, in the time that notice detects entity IMS network over loading, SBC or P-CSCF can pass through expansion interface (for example SIP INFO) notice P-GW IMS network over loading.Alternatively, P-GW is receiving after notice, returns to 200OK to SBC or P-CSCF.

According to embodiments of the invention, detecting entity is attaching position register/home subscriber server HLR/HSS, and wherein the method for Fig. 5 is carried out by the telecommunication voice application server in IMS network.

For example, in the time that notice detects entity IMS network over loading, telecommunication voice application server is notified IMS network over loading to HLR/HSS by information notice request.Alternatively, HLR/HSS is to telecommunication voice application server return information push-notification-answer.

According to embodiments of the invention, detecting entity is attaching position register/home subscriber server HLR/HSS, and the method for Fig. 5 is carried out by the query call conversation control function I-CSCF in IMS network or service call conversation control function S-CSCF entity; Or the method for Fig. 5 is carried out by HLR/HSS.

For example, in the time that notice detects entity IMS network over loading, I-CSCF or S-CSCF notify IMS network over loading to HLR/HSS by information notice request.Alternatively, HLR/HSS is to I-CSCF or S-CSCF return information push-notification-answer.

For example, HLR/HSS can judge the User-Data-Request(UDR from TAS receiving within the unit interval) or User-Data-Answer(UDA) number of message whether be greater than certain threshold values, and in the time that this threshold value is greater than this threshold value, determine IMS overload.

Although should be understood that in above-described embodiment and be illustrated as an example of IMS network over loading example, for CS network over loading, also can adopt similar method to detect CS network over loading.

Fig. 6 is the indicative flowchart of the process of the transport service of one embodiment of the present of invention.The example of the embodiment that is embodied as Fig. 2 to Fig. 5 of Fig. 6.

In the present embodiment, describe the scene of VoLTE fault, the IMS network failure of carrying VoLTE detected, and will carry out Business Processing by IMS network and switch to by CS network and carry out Business Processing, adopted CSFB mode to process business.The present embodiment adopts fault detection logic entity or network element to detect the fault of IMS network, and this logic entity can be realized on HLR/HSS or P-GW.Can be by unavailable VoLTE or the unavailable notice of IMS network to MME for the HLR/HSS of fault detect or P-GW.MME arranges VoLTE or the unavailable instruction of IMS network, and by unique temporary mark (the Globally Unique Temporary Identity of the overall situation, GUTI) heavy assigning process or EPS detach detachment process notice UE initiate TAU again, indicate UE for example to initiate associating TAU(, Combined TAU with IMSI attach or Combined TAU) process, and follow-up use CSFB mode is processed business.Concrete steps are as follows.

605, HLR/HSS detects IMS fault condition.For example, HLR/HSS detects (Monitor) faults of each signaling link (for example, TDM link or IP link) to telecommunication voice application server (Telephony Application Server, TAS), and continues for some time.

610, HLR/HSS detects IMS fault condition.For example, HLR/HSS detects faults of each signaling link (for example, IP link) of I-CSCF or S-CSCF, and continues for some time.

Should be understood that step 610 is replacement schemes of step 605.

615, HLR/HSS judges IMS network failure according to testing result, and notifies (Info-Notify) message that IMS fault (IMS Failure) is notified to MME by information.Based on 3GPP29.272 standard, the Info-Notify message of expansion is as shown in following table 1 and table 2.

Table 1 is for order-code value of S6a/S6d Info-Notify

Table 2Info-NotifyRequest

620, MME is to HLR/HSS return information push-notification-answer (Info-NotifyAnswer) message.Info-Notify message is as shown in following table 1 and table 2.

Table 3Info-NotifyAnswer

625, P-GW detects IMS fault condition.For example, P-GW responds (Response) message by ICMP loopback (echo)/ICMP, adopts the Internet packets to explore (Packet Internet Grope, PING) mechanism and detects SBC (P-CSCF).The all faults of SBC (P-CSCF) that are connected with P-GW detected, and continue for some time.

630, P-GW detects all SBC (P-CSCF) fault, S5/S8 interface by expansion more new bearer request (Update bearer Request) message by IMS signalling trouble to S-GW.

Based on 3GPP29.274, expansion is upgraded bearing request message and (for the sake of clarity, only show the content of Private Extension cell) as shown in following table 4 and table 5.Private Extension presses coding shown in table 5.Private Extension comprises IMS fault (IMS Failure) instruction.

The cell of table 4Update Bearer Request

Table 5Private Extension

Should be understood that as long as HLR/HSS or P-GW only have one to detect that IMS fault sets up, think IMS fault.

635, S-GW S11 interface by expansion more new bearer request (Update Bearer Request) message by IMS signalling trouble to MME.Based on 3GPP29.274, the renewal bearing request message of expansion is referring to table 4 and table 5.

It is unavailable that 640, MME arranges VoIMS, and return to more new bearer response (Update Bearer Response) to S-GW.

645, S-GW returns to more new bearer response to P-GW.

650, MME can initiate TAU again by following flow process notice UE:

(1) by carrying out the heavy assigning process of GUTI, in heavy assignment commands (GUTIReallocation Command) message of GUTI, carry new GUTI(New GUTI) and invalid TA list (Invalid TA List), trigger UE and initiate TAU, following steps are described as an example of the heavy assigning process of GUTI example.

(2) EPS detachment process carries and again adheres to request (re-attach required) Indication message, triggers UE and initiates TAU.

655, UE returns to GUTI to MME and is heavily assigned (GUTI Reallocation Complete) message.

660, UE initiates TAU process to MME immediately.

665, MME returns to TAU and accepts (TAU Accept) message, and wherein IMS voice instruction (the IMS Voice over PS session supported Indication) cell based on PS session of the support in TAU acceptance (TAUAccept) message is set to False.

670, UE receives TAU Accept message, accept message according to TAU and judge that the IMS voice (IMS Voice over PS session) based on PS session are unavailable, concurrent network TAU request message, send TAU request (TAU Request) message to MME, in order to the EPS/IMSI TAU flow process of instruction associating, parameter instruction UE wherein possesses CS and falls (CS Fallback) ability after rise.

675, MME processes TAU request.

680, MME sends SGsAP-LOCATION-UPDATE-REQUEST message to VLR, this message comprises reposition district mark (LocationArea Identity, LAI), temporary mobile subscriber identity (Temporary Mobile Subscriber Identity, IMSI), the parameter such as MME title (MME name) and position updating type (Location Update Type), wherein MM title is the domain name of MME.

685, VLR store M ME information, and this user's SGs interface conjunctionn under establishment and MME.VLR, according to user profile and location area information, is initiated to the position update flow of HLR.

690, VLR returns to SGsAP-LOCATION-UPDATE-ACCEPT message to MME, if VLR supports that TMSI heavily distributes, this message comprises parameter L AI and TMSI; If VLR does not support that TMSI heavily distributes, message comprises parameter L AI and IMSI.

695, MME carries out the follow-up business processing procedure of TAU.

After IMS fault, user registers according to CSFB mode, and follow-up business is processed and processed according to CSFB mode.

710, UE initiates CS Fallback voice service request.

720, MME sends S1-AP request message (for example, S1-AP UE CONTEXT MODIFICATION REQUEST message) to eNodeB, and this message comprises CS and falls designator (CS Fallback Indicator) after rise.This message instruction eNodeB, UE falls back to UTRAN/GERAN because of CS Fallback service needed.

730, eNodeB requires UE to start the cell measurement of system, and obtains the measurement report that UE reports, and determines redirected target system cells.Then send the concrete radio configuration information of goal systems to UE, and the RRC discharging connects.

740, UE accesses target system cells, initiates the service request (CM Service Request) in CS territory.

750, if the MSC Server that the MSC Server of target system cells ownership registers while adhering to EPS network from UE is different, when this MSC Server receives the service request of UE, due to the information of this UE not, can take more new technological process of implicit location, accept user's request.

If MSC server does not support implicit location to upgrade, and MSC server do not have user data (serving the MSC server that MSC server and EPS/IMSI register different), refuses this user's service request.

If MSC Server refusal user's service request can cause UE to initiate a CS territory position update flow.

760, CS territory audio call Establishing process.

Can there be following three kinds of situations in calling subscriber source:

(1) derive from CS/PSTN(Public Switched Telephone Network, PSTN) VoLTE user's (according to CSFB registration) of calling subscriber's Call failure IMS network of network.

(2) derive from VoLTE user's (according to CSFB registration) of calling subscriber's Call failure IMS network of other IMS networks, when the intercommunication of the first two IMS network is generally by CS network switch, caller IMS network can pass through MGCF striking out, is then routed to GMSC.

(3) derive from VoLTE user's (according to CSFB registration) of calling subscriber's Call failure IMS network of other IMS networks, if the intercommunication of two IMS networks is realized by IBCF/IBGF, due to fault of called IMS network, therefore need IBCF to configure active and standby route, the i.e. main IMS fault that is routed to, can use route stand-by to be routed to CS, then be routed to GMSC.

810, GMSC(Gateway Mobile Switching Center, GMSC (gateway mobile switching center)) receive identification and Access Management Access (Identity andAccess Management, IAM) incoming message.

820, GMSC sends SRI(Send Routing Information, called sending routing information to HLR/HSS).

830, HLR/HSS is according to judging fault of IMS in embodiment in Fig. 6, for called be that VoLTE user's calling is according to CS flow processing, for example, directly obtain MSRN(Mobile Station Roaming Number, mobile station roaming number) return to GMSC, route calls to CS network, and no longer call anchoring is processed to IMS territory.

840, MSC/VLR server is received IAM incoming message.

850, MSC/VLR server is associated and MME information according to the SGs existing, and sends SGsAP-PAGING-REQUEST message to MME, and this message comprises IMSI, TMSI, service indicator, LAC etc.

860, MME sends paging (Paging) message to eNodeB.ENodeB initiates the Paging flow process of eating dishes without rice or wine.

870, UE connect and service request (the Extended Service Request) message that sends expansion to MME.

880, MME sends SGsAP-SERVICE-REQUEST message to MSC/VLR server.MSC server receives this message, no longer retransmits paging request message to MME.For avoiding in call-connection process, caller waits for too long, MSC/VLR server is received the SGs business request information that comprises Idle state instruction, first notifies caller, calls out just in handshaking procedure.

890, MME sends initial UE context foundation (Initial UE Context Setup), and message is to eNodeB, and this message comprises CS Fallback designator.This message instruction eNodeB, UE falls back to UTRAN/GERAN because of CSFB service needed.

892, UE is switched to UTRAN/GERAN from E-UTRAN.

894, be accompanied by the corresponding interface establishment of connection, UE returns page response (Paging Response) message or location update request message to MSC server.

896, MSC/VLR receives after the page response of UE, sets up CS and connects.

Fig. 9 is the indicative flowchart of the process of the transport service of another embodiment of the present invention.The example of the embodiment that is embodied as Fig. 2 to Fig. 5 of Fig. 9.

The present embodiment is described the scene of VoLTE overload, in the case of the IMS overload that carrying VoLTE detected, a certain proportion of Business Processing is switched to by CS network and carries out Business Processing, and certain customers are used VoLTE mode transport service, and other users use CSFB mode transport service.The present embodiment adopts overload detection logic entity or network element to detect the fault of IMS network, and this logic entity can be realized on HLR/HSS or P-GW.For HLR/HSS or the P-GW of overload detection, can be by VoLTE mode overload notification to MME, MME proportionally carries out the TAU of VoLTE/CSFB mode to terminal, use CSFB to carry out VoLTE Traffic Distribution.HLR/HSS detection IMS transships or P-GW detects IMS overload, as long as there is one to detect establishment, thinks that IMS transships.

905, TAS reports IMS to occur overload by Sh interface to HLR/HSS.

For example, notify (Info-Notify) message by IMS overload (Overlaod) notice HLR/HSS by information.Based on 3GPP29.328/29.329, the Info-Notify message of expansion is as follows:

Table 6 is for Info-Notify order-code value of Sh

Command name	Abbreviation	Code
			Info-Notify-Request	INR	350
Info-Notify-Answer	INA	350

Wherein message content defines referring to table 2 and table 3.

910, HLR/HSS return information push-notification-answer (Info-NotifyAnswer) message.

915, CSCF reports IMS to occur overload by Cx/Dx interface, and by Info-Notify message, IMS Overlaod is notified to HLR/HSS.Based on 3GPP29.228/29.229, the Info-Notify of expansion is as follows.

Table7 is for Info-Notify order-code value of Cx/Dx

Wherein message content defines referring to table 2 and table 3.

920, HLR/HSS is to I/S-CSCF return information push-notification-answer (Info-Notify Answer) message.

Should be understood that step 915 and 920 is alternative steps of step 905 and 910.

925, HLR/HSS judges IMS overload, and by Info-Notify message by IMS overload notification to MME.Based on 3GPP29.272, this message definition is referring to table 1, and message content defines referring to table 2 and table 3.

930, MME is to HLR/HSS return information push-notification-answer (Info-NotifyAnswer) message.

935, P-GW detects SBC (P-CSCF) overload condition.SBC(P-CSCF) overload (for example, the CPU usage by SBC, call successful rate, QoS survey etc. at least one in parameter) detected, for example, notify to P-GW by expansion interface (, SIP INFO).The method of judgement overload is specific as follows.

1) judge whether CPU usage exceedes certain threshold values, in the situation that CPU usage exceedes certain threshold value, determine IMS overload.

2) by monitoring VoLTE call successful rate, SBC can add up and whether obtain VoLTE call successful rate lower than certain threshold values, determines IMS overload at VoLTE call successful rate lower than certain threshold values in the situation that.

2), by monitoring IP Qos, SBC can be based on RTCP(RTP Control Protocol, RTP Control Protocol) and call out sampling and add up the Qos that obtains certain LTE cell call lower than certain threshold values.

Concrete message body is as follows.

940, P-GW returns to 200OK as the response to SIP INFO to SBC (P-CSCF);

After 945, P-GW interception SIP INFO, resolve this message, judge SBC (P-CSCF) overload, at S5/S8 interface by more new bearer request (the Update bearer Request) message expanded by IMS overload notification to S-GW.Based on 3GPP29.274, the message of expansion is referring to table 4 and table 5.

Follow-up is the normal process of current LTE/EPC/VoLTE registration.

950, S-GW S11 interface by expansion renewal bearing request message by IMS overload notification to MME.Based on 3GPP29.274, the message of expansion is referring to table 4 and table 5.

955, MME arranges VoIMS overload, and returns to more new bearer response (Update Bearer Response) message to S-GW.

960, S-GW returns to renewal bearing response message to P-GW.

After 965, IMS overload, MME arranges user proportionally to carry out VoLTE mode/CSFB mode and registers.

970, follow-up business is processed according to the situation of user's registration respectively according to the processing of VoLTE mode/CSFB mode.

Initiate according to VoLTE mode user in the process of caller, UE, by the bearer path of eNodeB/S-GW/P-GW, is delivered to IMS network by INVITE, for example, sends to P-CSCF.SBC (P-CSCF) processes INVITE, and is forwarded to S-CSCF.S-CSCF triggers TAS by INVITE and processes calling service.TAS returns to S-CSCF continuation route INVITE after handling calling service.The process that user initiates caller according to CSFB mode can, referring to the description of the embodiment of Fig. 7, be not repeated herein.

In the present embodiment, IMS overload, makes VoLTE load be shared by CSFB, and the embodiment of CSFB called flow and Fig. 8 is similar, does not repeat them here.Different from the embodiment of Fig. 8, in the present embodiment, if HLR/HSS judges that active user is without VoLTE/SRVCC registration (not supporting IMS-Voice-Over-PS-Sessions), VoLTE user's calling is according to CS flow processing.For example, directly obtain MSRN and return to GMSC, no longer call anchoring is processed to IMS territory.

Calling subscriber's source and called subscriber relation can comprise several as follows.

(1) calling subscriber who derives from CS/PSTN network calls out VoLTE user's (according to VoLTE registration) of transshipping IMS network, referring to the flow process of Figure 10.

(2) calling subscriber who derives from other IMS networks calls out VoLTE user's (according to VoLTE registration) of transshipping IMS network, when CS network switch is generally passed through in the intercommunication of the first two IMS network, caller IMS network can pass through MGCF striking out, is then routed to GMSC, referring to the flow process of Figure 10.

(3) calling subscriber who derives from other IMS networks calls out the VoLTE user of overload IMS network, if the intercommunication of two IMS networks by IBCF/IBGF, can be referring to the flow process of Figure 11 below.

1010, GMSC receives IAM incoming message.

1020, GMSC sends SRI to HLR/HSS.

1030, HLR/HSS judges that active user is VoLTE/SRVCC registration (supporting IMS-Voice-Over-PS-Sessions), VoLTE user's calling, according to VoLTE flow processing, for example, is returned to grappling data (T-CSI) to GMSC.

1040, GMSC to TAS(for example, Anchor AS) send IDP(Initial DP), to carry out intelligent trigger.

1050, Anchor AS returns to IMRN number to GMSC by the number of changing.

1060, GMSC routes the call to IMS according to new IMRN number and processes.

Can comprise following several about calling subscriber's source and called subscriber relation.

(1) calling subscriber who derives from CS/PSTN network calls out VoLTE user's (according to VoLTE registration) of overload IMS network, and called flow is exactly the situation (be Figure 10 anchor to the follow-up scene that IMS calls out from CS) of this scene description.

(2) calling subscriber who derives from other IMS networks calls out VoLTE user's (according to VoLTE registration) of transshipping IMS network, when CS network switch is generally passed through in the intercommunication of the first two IMS network, caller IMS network can pass through MGCF striking out, and being then routed to GMSC(is that Figure 10 anchors to from CS the follow-up scene that IMS calls out).

(3) calling subscriber who derives from other IMS networks calls out VoLTE user's (according to VoLTE registration) of transshipping IMS network, if the intercommunication of two IMS networks is realized by IBCF/IBGF, called flow is exactly the situation of this scene description.

(4) calling subscriber who derives from other IMS networks calls out VoLTE user's (according to CSFB registration) of transshipping IMS network, if the intercommunication of two IMS networks is realized by IBCF/IBGF, called flow is exactly the situation of this scene description.

1105, callee side I/S-CSCF receives the INVITE of Incoming.

1110, S-CSCF sends INVITE to TAS.

1115, TAS starts called access domain selection flow process inquiry T-ADS(Terminating ADS, termination access domain selection) determine called subscriber is in which network insertion.

1120, HLR/HSS is by IDR(Insert Subscriber Data-Request, data inserting request) message sends T-ADS inquiry to MME.

1125, MME returns to IDA(Insert Subscriber Data Answer, data inserting request) message carries T-ADS result.

1130, HLR/HSS by PSI(Provide Subscriber Information, provides user profile) message sends T-ADS inquiry to SGSN.

1135, SGSN returns to PSI_ACK message and carries T-ADS result.

1140, HLR/HSS is by UDA(User-Data-Answer, user data requests) message returns to T-ADS Query Result to TAS.

1145 to 1150, TAS determine that according to T-ADS active user is in IMS territory, at IMS territory terminating call.

1155 to 1180, TAS determine that according to T-ADS active user is in CS territory, at CS territory terminating call.

The present embodiment is described, and VoLTE fault recovery scene detects the IMS fault recovery of carrying VoLTE, and Business Processing is switched back to VoLTE mode from CS network.Logic entity or network element that the present embodiment adopts fault recovery to detect detect IMS network, and this logic entity can be realized on HLR/HSS or P-GW.For fault recovery detect HLR/HSS and P-GW by VoLTE (Voice Over LTE) available notification to MME.MME arrange VoLTE can with instruction, and by GUTI weigh assigning process or evolution grouping system (Evolved Packet System, EPS) attachment removal (detach) process notify UE again initiate TAU, follow-up use VoLTE mode is processed business.HLR/HSS detects IMS fault recovery and P-GW and detects IMS fault recovery, thinks IMS fault recovery.

1205, HLR/HSS detects IMS fault recovery condition.For example, HLR/HSS detects that the signaling link (TDM link or IP link) of TAS all recovers.

1210, HLR/HSS detects that the signaling link (IP link) of I/S-CSCF all recovers.

Should be understood that step 1210 is replacement schemes of step 1205.

1215, HLR/HSS judges that according to testing result IMS judges IMS network disaster recovery, and recovers (IMS Recovery) message informing to MME by (Info-Notify) IMS.Based on 3GPP29.272, the message of expansion and parameter are referring to table 1, table 2 and table 3.

1220, MME return information push-notification-answer (Info-Notify Answer) message.

1225, P-GW detects IMS fault condition.For example, PGW is whether Ping mechanism detection SBC (P-CSCF) fault is recovered by ICMP echo/ICMPResponse, all fault recoveries of SBC (P-CSCF) of connection detected.

1230, PGW notifies IMS fault recovery to S-GW by more new bearer request (the Update bearer Request) message of expansion at S5/S8 interface.Based on 3GPP29.274, the message of expansion is referring to table 4 and table 5.

1235, S-GW notifies MMEIMS fault recovery at S11 interface by Update bearer Request extension of message.Based on 3GPP29.274, the message of expansion is referring to table 4 and table 5.

1240, MME arranges VoIMS fault recovery or available, and returns to more new bearer response (Update Bearer Response) to S-GW.

1245, S-GW returns to more new bearer response (Update Bearer Response) to P-GW.

1250, MME can initiate TAU again by following flow process notice UE.

(1) the heavy assigning process of GUTI, carries New GUTI and invalid TA List, triggers UE and initiates TAU, and following steps are described as an example of the heavy assigning process of GUTI example.

1255, UE returns to GUTI and is heavily assigned (GUTI Reallocation Complete) message.

1260, UE initiates TAU process to MME immediately.

1265, MME returns to TAU and accepts (TAU Accept) message, and wherein IMS voice instruction (the IMS Voice over PS session supported Indication) cell based on PS session of the support in TAU acceptance (TAU Accept) message is set to True.

1270, UE receives TAU Accept message, accepts message judge that IMS Voice over PS session can use according to TAU, initiates network TAU request, sends TAU Request message to MME.Wherein parameter is supported SRVCC ability (capability), and voice domain is preferentially selected (Voice domain preference) for PS(Packet Switched, packet switching).

1275, MME processes TAU request, carries out the follow-up processing of TAU, registers according to VoLTE/SRVCC mode.

1280, MME sends TAU to UE and accepts message.

The present embodiment is described the scene that VoLTE overload is recovered, and detects that the IMS overload of carrying VoLTE is recovered, and Business Processing is switched back to VoLTE mode.The present embodiment adopts overload to recover to detect logic entity IMS network is detected, and this logic entity can be realized on HLR/HSS or P-GW.The HLR/HSS and the P-GW that recover detection for transshipping recover notice to MME by VoLTE overload.The terminal that MME adheres to CSFB, weighs assigning process or EPS detach process notice UE by GUTI and again initiates TAU, and VoLTE is set can be with instruction, follow-up use VoLTE mode is processed business.

After IMS fault recovery, user registers according to VoLTE mode, and follow-up business is processed and processed according to VoLTE mode, and follow-up business is processed and is treated to normal process according to VoLTE mode, does not repeat them here.

HLR/HSS detects that IMS overload is recovered and/or P-GW detects IMS overload and recovers, and thinks that IMS overload recovers.

1305, TAS reports IMS to occur overload recovery by Sh interface to HLR/HSS.

For example, notifying (Info-Notify) message that IMS is recovered to (Resume) by information notifies to HLR/HSS.Based on 3GPP29.328/29.329, the Info-Notify message of expansion and parameter are referring to table 4, table 2 and table 3.

1310, HLR/HSS return information push-notification-answer (Info-Notify Answer) message.

1315, CSCF reports IMS to occur overload recovery by Cx/Dx interface, and by Info-Notify message, IMS Resume is notified to HLR/HSS.Based on 3GPP29.228/29.229, the Info-Notify message of expansion and parameter are referring to table 5, table 2 and table 3.

1320, HLR/HSS returns to response.

1325, HLR/HSS judges the recovery of IMS overload, by Info-Notify message, IMSResume is notified to MME.Based on 3GPP29.272, message definition referring to expansion Info-Notify message and parameter referring to table 6, table 2 and table 3.

1330, MME is to HLR/HSS return information push-notification-answer (Info-NotifyAnswer) message.

1335,, P-GW detects SBC (P-CSCF) overload recovery condition.SBC detects overload recovery (for example passing through CPU usage/call successful rate/QoS detection etc.), for example, notifies PGW by expansion interface (SIP INFO).The method that judgement overload is recovered is specific as follows.

1) judge that whether CPU usage is lower than certain threshold values, in CPU usage lower than certain threshold value in the situation that, determine that IMS overload recovers.

2) by monitoring VoLTE call successful rate, SBC can add up and whether obtain VoLTE call successful rate higher than certain threshold values, at VoLTE call successful rate higher than certain threshold values in the situation that, determines that IMS overload recovers.

2) by monitoring IP Qos, SBC can be based on RTCP(RTP Control Protocol, RTP Control Protocol) and call out Qos that sampling statistics obtains certain LTE cell call higher than certain threshold values, higher than certain threshold values, determine that IMS overload recovers at the Qos of certain LTE cell call.

Concrete message body is as follows.

1340, PGW returns to the response of 200OK as SIP INFO to SBC (P-CSCF);

After 1345, PGW interception SIP INFO, resolve this message, judge the recovery of SBC (P-CSCF) overload, pass through more new bearer request (Update bearer Request) extension of message notice S-GW IMS overload at S5/S8 interface and recover.Based on 3GPP29.274, the message of expansion is referring to table 4 and table 5.

Follow-up is the normal process of current LTE/EPC/VoLTE registration.

1350, S-GW transships by the renewal bearing request message message informing MMEIMS of expansion at S11 interface.Based on 3GPP29.274, the message of expansion is referring to table 4 and table 5;

1355，。MME arranges VoIMS overload and recovers, and returns to renewal bearing response message to S-GW.

1360, S-GW returns to renewal bearing response message to P-GW.

After 1365, IMS overload is recovered, MME progressively registers user according to VoLTE mode, and follow-up business is processed according to the processing of VoLTE mode.

Subsequent step is consistent with 1250 to 1280, does not repeat them here.

Figure 14 is the structural representation of the device 1400 of transport service according to an embodiment of the invention.The device 1400 of transport service comprises receiver module 1410 and handover module 1420.

Receiver module 1410 receives the first abnormality detection result of the first switching network, and it is abnormal that the first abnormality detection result is used to indicate the first switching network.The first abnormality detection result that handover module 1420 receives according to receiver module 1410 is toggled to small part subscriber equipment initiating updating of tracking area process, so that at least part of business corresponding to subscriber equipment switches to the second switching network by the first switching network at least partly, wherein the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, the second switching network is another in CS network and IMS network, and business is the business that CS network and IMS network are all supported.

According to embodiments of the invention, if the first abnormality detection result is indicated the first switching network fault, subscriber equipment is the whole subscriber equipmenies under MME at least partly, business is whole business that CS network and IMS network are all supported at least partly, the state that handover module 1420 arranges the first switching network is unavailable or fault, notify whole subscriber equipmenies again to initiate the first tracing section updating TAU process, and after receiving the TAU process that whole subscriber equipmenies initiate again, send a TAU to whole subscriber equipmenies and accept message, wherein a TAU accepts message to be used to indicate the first switching network is unavailable or fault, to at least part of business is switched to the second switching network.

Alternatively, as another embodiment, receiver module also receives the second abnormality detection result of the first switching network, and the second abnormality detection result is used to indicate the first switching network and recovers from fault; The state that handover module arranges the first switching network is available or recovers from fault, installs 1400 and also comprises:

Sending module 1430, be used for notifying whole subscriber equipmenies to initiate the 2nd TAU process, and after receiver module receives the 2nd TAU process of whole subscriber equipmenies initiations, send the 2nd TAU to whole subscriber equipmenies and accept message, the 2nd TAU accepts message to be used to indicate the first switching network is available or recovers from fault, at least part of business is switched back to the first switching network.

According to embodiments of the invention, if the first abnormality detection result is indicated the first switching network overload, subscriber equipment is the certain customers' equipment under MME at least partly, business is the partial service that CS network and IMS network are all supported at least partly, the state that handover module 1420 arranges the first switching network is overload, and register to the first switching network and the second switching network according to the subscriber equipment that default ratio setting is different, notification section subscriber equipment is initiated the first tracing section updating TAU process again, after receiving the TAU process that certain customers' equipment initiates again, MME sends a TAU to certain customers' equipment and accepts message, wherein a TAU accept message be used to indicate the first switching network be unavailable or overload, to partial service is switched to the second switching network, make different subscriber equipmenies proportionally adopt the first switching network or the second switching network transport service.

Alternatively, as another embodiment, receiver module 1410 also receives the second abnormality detection result of the first switching network, and the second abnormality detection result is used to indicate the first switching network and recovers from overload; The state that handover module 1420 arranges the first switching network is overload recovery; MME arranges part subscriber equipment and registers to the first switching network, wherein installs 1400 and also comprises:

Sending module 1430, initiate the 2nd TAU process for notification section subscriber equipment, and after receiver module receives the 2nd TAU process of certain customers' equipment initiation, send the 2nd TAU to certain customers' equipment and accept message, the 2nd TAU accept message be used to indicate the first switching network be available or from overload recover, to partial service is switched back to the first switching network.

According to embodiments of the invention, receiver module 1410 receives the information notice request that attaching position register/home subscriber server HLR/HSS sends, and information notice request comprises the first abnormality detection result.

According to embodiments of the invention, the second switching network is CS network, the first switching network is IMS network, and receiver module 1410 receives the more new bearer request that the public data network gateway P-GW in IMS network sends, and more new bearer request comprises the first abnormality detection result.

According to embodiments of the invention, the second switching network is IMS network, and the first switching network is CS network, and receiver module 1410 receives the information notice request that the media gateway MGW in CS network sends, and information notice request comprises the first abnormality detection result.

Operation and the function of the unit of device 1400 can, with reference to the method for above-mentioned Fig. 2, for fear of repetition, not repeat them here.

Figure 15 is the structural representation of the device 1500 of transport service according to another embodiment of the present invention.The device 1500 of transport service comprises detection module 1510 and sending module 1520.

Detection module 1510 detects extremely to the first switching network, obtains the first abnormality detection result, and it is abnormal that wherein the first abnormality detection result is used to indicate the first switching network.Sending module 1520 sends and the first abnormality detection result detecting detected to Mobility Management Entity MME, so that MME is toggled to small part subscriber equipment initiating updating of tracking area process according to the first abnormality detection result, so that at least part of business corresponding to subscriber equipment switches to the second switching network from the first switching network at least partly, wherein the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, the second switching network is another in CS network and IMS network, and business is the business that CS network and IMS network are all supported.

According to embodiments of the invention, device 1500 is attaching position register/home subscriber server HLR/HSS, and sending module 1520 sends information notice request to MME, and information notice request comprises the first abnormality detection result.

Alternatively, as another embodiment, device 1500 also comprises: routing module 1530.

Routing module 1530 is in the situation that determining the first switching network fault, and the call routing that is called subscriber by least part of subscriber equipment is to the second switching network.

Alternatively, as another embodiment, device 1500 also comprises: determination module 1540 and routing module 1530.

Determination module 1540 determines as at least part of subscriber equipment of called subscriber whether register according to the first switching network.Routing module 1530 in the situation that being determined to small part subscriber equipment according to the second switching network registration or according to the first switching network registration, call routing to the second switching network using at least part of subscriber equipment as called subscriber.

Determination module 1540 determines as at least part of subscriber equipment of called subscriber whether register according to the first switching network.Routing module 1530 in the situation that being determined to small part subscriber equipment according to the first switching network registration or not registering according to second network, call routing to the first switching network using at least part of subscriber equipment as called subscriber.

According to embodiments of the invention, the first switching network is IMS network, the second switching network is CS network, device 1500 is the public data network gateway P-GW in IMS network, sending module 1520 sends more new bearer request by gateway S-GW to MME, more new bearer request comprises the first abnormality detection result, whether detection module 1510 detects Session Border Controller SBC or Proxy Call Session Control Function P-CSCF entity in IMS network abnormal, wherein at SBC or P-CSCF entity abnormal in the situation that, the first abnormality detection result indicates the first switching network abnormal.

According to embodiments of the invention, detection module 1510 also, to extremely the detecting of the first switching network, obtains the second abnormality detection result, and wherein the second abnormality detection result is used to indicate the recovery from abnormal of the first switching network; Detection module 1510 also sends the second abnormality detection result to MME.

According to embodiments of the invention, the first switching network is CS network, and the second switching network is IMS network, and device 1500 is the media gateway MGW in CS network, sending module 1520 sends information notice request to MME, and information notice request comprises the first abnormality detection result.

Operation and the function of the unit of device 1500 can, with reference to the method for above-mentioned Fig. 3, for fear of repetition, not repeat them here.

Figure 16 is the structural representation of the device 1600 of transport service according to still another embodiment of the invention.The device 1600 of transport service comprises receiver module 1610 and sending module 1620.

Receiver module 1610 in the situation that of the first switching network fault or overload, receiving mobility management entity MME send the notice of again initiating the first tracing section updating TAU process; The notice that sending module 1620 receives according to receiver module 1610 is initiated the first tracing section updating process; Receiver module 1610 is also accepted message for receiving MME according to a TAU of the first tracing section updating process transmission, wherein a TAU accepts message to be used to indicate the first switching network is unavailable or fault, to at least part of business is switched to the second switching network, the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, the second switching network is another in CS network and IMS network, and business is the business that CS network and IMS network are all supported.

Alternatively, as another embodiment, the notice of again initiating the second tracing section updating TAU process that receiver module 1610 also sends for receiving MME; Sending module 1620 is also for initiating the second tracing section updating process according to the notice of again initiating the second tracing section updating TAU process; Receiver module 1610 is also accepted message for receiving MME according to the 2nd TAU of the second tracing section updating process transmission, wherein the 2nd TAU accept message be used to indicate the first switching network be available or from fault or overload recover, at least part of business is switched back to the first switching network.

Operation and the function of the unit of device 1600 can, with reference to the method for above-mentioned Fig. 4, for fear of repetition, not repeat them here.

Figure 17 is according to the structural representation of the device 1700 of the transport service of an embodiment more of the present invention.The device 1700 of transport service comprises detection module 1710 and notification module 1720.

Whether detection module 1710, exceed default threshold value for detection of the overload condition of IMS network.Notification module 1720, for detecting that at detection module 1710 overload condition of IMS network exceedes default threshold value, notice detects entity IMS network over loading, determines IMS network over loading to detect entity according to notice.

According to embodiments of the invention, detecting entity is public data network gateway P-GW, and device 1700 is Session Border Controller SBC or the Proxy Call Session Control Function P-CSCF entity in IMS network.

According to embodiments of the invention, detecting entity is attaching position register/home subscriber server HLR/HSS, wherein installs 1700 for the telecommunication voice application server in IMS network; Or device 1700 is query call conversation control function I-CSCF or the service call conversation control function S-CSCF entity in IMS network; Or device 1700 is HLR/HSS.

Operation and the function of the unit of device 1700 can, with reference to the method for above-mentioned Fig. 5, for fear of repetition, not repeat them here.

Figure 18 is the structural representation of the device 1800 of transport service according to an embodiment of the invention.The device 1800 of transport service comprises receiver 1810, processor 1820, memory 1830 and communication bus 1840.

Receiver 1810 receives the first abnormality detection result of the first switching network, and it is abnormal that the first abnormality detection result is used to indicate the first switching network.Processor 1820 calls by communication bus 1840 code that memory 1830 is stored, be toggled to small part subscriber equipment initiating updating of tracking area process with the first abnormality detection result receiving according to receiver 1810, so that at least part of business corresponding to subscriber equipment switches to the second switching network by the first switching network at least partly, wherein the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, the second switching network is another in CS network and IMS network, and business is the business that CS network and IMS network are all supported.

According to embodiments of the invention, if the first abnormality detection result is indicated the first switching network fault, subscriber equipment is the whole subscriber equipmenies under MME at least partly, business is whole business that CS network and IMS network are all supported at least partly, the state that processor 1820 arranges the first switching network is unavailable or fault, notify whole subscriber equipmenies again to initiate the first tracing section updating TAU process, and after receiving the TAU process that whole subscriber equipmenies initiate again, send a TAU to whole subscriber equipmenies and accept message, wherein a TAU accepts message to be used to indicate the first switching network is unavailable or fault, to at least part of business is switched to the second switching network.

Alternatively, as another embodiment, receiver also receives the second abnormality detection result of the first switching network, and the second abnormality detection result is used to indicate the first switching network and recovers from fault; The state that processor arranges the first switching network is available or recovers from fault, wherein installs 1800 and also comprises: transmitter 1850, for notifying whole subscriber equipmenies to initiate the 2nd TAU process; After receiver receives the 2nd TAU process of whole subscriber equipmenies initiations, send the 2nd TAU to whole subscriber equipmenies and accept message, the 2nd TAU accepts message to be used to indicate the first switching network is available or recovers from fault, at least part of business is switched back to the first switching network.

According to embodiments of the invention, if the first abnormality detection result is indicated the first switching network overload, subscriber equipment is the certain customers' equipment under MME at least partly, business is the partial service that CS network and IMS network are all supported at least partly, the state that processor 1820 arranges the first switching network is overload, and register to the first switching network and the second switching network according to the subscriber equipment that default ratio setting is different, notification section subscriber equipment is initiated the first tracing section updating TAU process again, after receiving the TAU process that certain customers' equipment initiates again, MME sends a TAU to certain customers' equipment and accepts message, wherein a TAU accept message be used to indicate the first switching network be unavailable or overload, to partial service is switched to the second switching network, make different subscriber equipmenies proportionally adopt the first switching network or the second switching network transport service.

Alternatively, as another embodiment, receiver 1810 also receives the second abnormality detection result of the first switching network, and the second abnormality detection result is used to indicate the first switching network and recovers from overload; The state that processor 1820 arranges the first switching network is overload recovery; MME arranges part subscriber equipment and registers to the first switching network, wherein installing 1800 also comprises: transmitter 1850, initiate the 2nd TAU process for notification section subscriber equipment, and after receiver module receives the 2nd TAU process of certain customers' equipment initiation, send the 2nd TAU to certain customers' equipment and accept message, the 2nd TAU accept message be used to indicate the first switching network be available or from overload recover, to partial service is switched back to the first switching network.

According to embodiments of the invention, receiver 1810 receives the information notice request that attaching position register/home subscriber server HLR/HSS sends, and information notice request comprises the first abnormality detection result.

According to embodiments of the invention, the second switching network is CS network, and the first switching network is IMS network, and receiver 1810 receives the more new bearer request that the public data network gateway P-GW in IMS network sends, and more new bearer request comprises the first abnormality detection result.

According to embodiments of the invention, the second switching network is IMS network, and the first switching network is CS network, and receiver 1810 receives the information notice request that the media gateway MGW in CS network sends, and information notice request comprises the first abnormality detection result.

Operation and the function of the unit of device 1800 can, with reference to the method for above-mentioned Fig. 2, for fear of repetition, not repeat them here.

Figure 19 is the structural representation of the device 1900 of transport service according to another embodiment of the present invention.The device 1900 of transport service comprises processor 1910, transmitter 1920, memory 1930 and communication bus 1940.

Processor 1910 calls the code in memory 1930 by communication bus 1940, with to extremely the detecting of the first switching network, obtains the first abnormality detection result, and it is abnormal that wherein the first abnormality detection result is used to indicate the first switching network.Transmitter 1920 sends and the first abnormality detection result detecting detected to Mobility Management Entity MME, so that MME is toggled to small part subscriber equipment initiating updating of tracking area process according to the first abnormality detection result, so that at least part of business corresponding to subscriber equipment switches to the second switching network from the first switching network at least partly, wherein the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, the second switching network is another in CS network and IMS network, and business is the business that CS network and IMS network are all supported.

According to embodiments of the invention, device 1900 is attaching position register/home subscriber server HLR/HSS, and transmitter 1920 sends information notice request to MME, and information notice request comprises the first abnormality detection result.

Alternatively, as another embodiment, processor 1910 is also in the situation that determining the first switching network fault, and the call routing that is called subscriber by least part of subscriber equipment is to the second switching network.

Alternatively, as another embodiment, processor 1910 also determines as at least part of subscriber equipment of called subscriber whether register according to the first switching network, and in the situation that being determined to small part subscriber equipment according to the second switching network registration or not registering according to the first switching network, call routing to the second switching network using at least part of subscriber equipment as called subscriber.

Alternatively, as another embodiment, processor 1910 also determines as at least part of subscriber equipment of called subscriber whether register according to the first switching network, and in the situation that being determined to small part subscriber equipment according to the first switching network registration or not registering according to second network, call routing to the first switching network using at least part of subscriber equipment as called subscriber.

According to embodiments of the invention, the first switching network is IMS network, the second switching network is CS network, device 1900 is the public data network gateway P-GW in IMS network, transmitter 1920 sends more new bearer request by gateway S-GW to MME, more new bearer request comprises the first abnormality detection result, whether processor 1910 detects Session Border Controller SBC or Proxy Call Session Control Function P-CSCF entity in IMS network abnormal, wherein at SBC or P-CSCF entity abnormal in the situation that, the first abnormality detection result indicates the first switching network abnormal.

According to embodiments of the invention, processor 1910 also, to extremely the detecting of the first switching network, obtains the second abnormality detection result, and wherein the second abnormality detection result is used to indicate the recovery from abnormal of the first switching network; Transmitter 1920 also sends the second abnormality detection result to MME.

According to embodiments of the invention, the first switching network is CS network, and the second switching network is IMS network, and device 1900 is the media gateway MGW in CS network, transmitter 1920 sends information notice request to MME, and information notice request comprises the first abnormality detection result.

Operation and the function of the unit of device 1900 can, with reference to the method for above-mentioned Fig. 3, for fear of repetition, not repeat them here.

Figure 20 is the structural representation of the device 2000 of transport service according to still another embodiment of the invention.The device 2000 of transport service comprises receiver 2010, transmitter 2050, processor 2010 and communication bus 2040.

Processor 2010 is for by communication bus control receiver 2010 and transmitter 2120.Memory 2130 is for storage code.Receiver 2010 in the situation that of the first switching network fault or overload, receiving mobility management entity MME send the notice of again initiating the first tracing section updating TAU process; The notice that transmitter 2020 receives according to receiver 2010 is initiated the first tracing section updating process; Receiver 2010 is also accepted message for receiving MME according to a TAU of the first tracing section updating process transmission, wherein a TAU accepts message to be used to indicate the first switching network is unavailable or fault, to at least part of business is switched to the second switching network, the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, the second switching network is another in CS network and IMS network, and business is the business that CS network and IMS network are all supported.

Alternatively, as another embodiment, the notice of again initiating the second tracing section updating TAU process that receiver 2010 also sends for receiving MME; Transmitter 2020 is also for initiating the second tracing section updating process according to the notice of again initiating the second tracing section updating TAU process; Receiver 2010 is also accepted message for receiving MME according to the 2nd TAU of the second tracing section updating process transmission, wherein the 2nd TAU accept message be used to indicate the first switching network be available or from fault or overload recover, at least part of business is switched back to the first switching network.

Operation and the function of the unit of device 2000 can, with reference to the method for above-mentioned Fig. 4, for fear of repetition, not repeat them here.

Figure 21 is according to the structural representation of the device 2100 of the transport service of an embodiment more of the present invention.The device 2100 of transport service comprises processor 2110, transmitter 2120, memory 2130 and communication bus 2140.

Whether processor 2110, for calling by communication bus 2140 code that memory is stored, exceed default threshold value with the overload condition that detects IMS network.Transmitter 2120, for detecting that at processor 2110 overload condition of IMS network exceedes default threshold value, notice detects entity IMS network over loading, determines IMS network over loading to detect entity according to notice.

According to embodiments of the invention, detecting entity is public data network gateway P-GW, and device 2100 is Session Border Controller SBC or the Proxy Call Session Control Function P-CSCF entity in IMS network.

According to embodiments of the invention, detecting entity is attaching position register/home subscriber server HLR/HSS, wherein installs 2100 for the telecommunication voice application server in IMS network; Or device 2100 is query call conversation control function I-CSCF or the service call conversation control function S-CSCF entity in IMS network; Or device 2100 is HLR/HSS.

Operation and the function of the unit of device 2100 can, with reference to the method for above-mentioned Fig. 5, for fear of repetition, not repeat them here.

The embodiment of the present invention also provides a kind of communication system to comprise: the device 1400 of Figure 14, the device 1500 of Figure 15, the device 1600 of Figure 16 and the device 1700 of Figure 17.

The embodiment of the present invention also provides a kind of communication system to comprise: the device 1800 of Figure 18, the device 1900 of Figure 19, the device 2000 of Figure 20 and the device 2100 of Figure 21.

Those of ordinary skill in the art can recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with the combination of electronic hardware or computer software and electronic hardware.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can realize described function with distinct methods to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.

Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the system of foregoing description, device and unit, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.

In the several embodiment that provide in the application, should be understood that disclosed system, apparatus and method can realize by another way.For example, device embodiment described above is only schematic, for example, the division of described unit, be only that a kind of logic function is divided, when actual realization, can have other dividing mode, for example multiple unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.

The described unit as separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in multiple network element.Can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme.

In addition, the each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.

If described function realizes and during as production marketing independently or use, can be stored in a computer read/write memory medium using the form of SFU software functional unit.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or the part of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) carry out all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CDs.

The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, any be familiar with those skilled in the art the present invention disclose technical scope in; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims

1. a method for transport service, is characterized in that, comprising:

Mobility Management Entity MME receives the first abnormality detection result of the first switching network, and it is abnormal that described the first abnormality detection result is used to indicate described the first switching network;

Described MME is toggled to small part subscriber equipment initiating updating of tracking area process according to described the first abnormality detection result, so that at least part of business corresponding to described at least part of subscriber equipment switches to the second switching network by the first switching network, wherein said the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, described the second switching network is another in described CS network and described IMS network, and described business is the business that described CS network and described IMS network are all supported.

2. method according to claim 1, it is characterized in that, if described the first abnormality detection result is indicated described the first switching network fault, described at least part of subscriber equipment is the whole subscriber equipmenies under described MME, described at least part of business is whole business that described CS network and described IMS network are all supported, wherein said MME is toggled to small part subscriber equipment initiating updating of tracking area process according to described the first abnormality detection result, so that at least part of business corresponding to described at least part of subscriber equipment switches to the second switching network by the first switching network, comprise:

The state that described MME arranges described the first switching network is unavailable or fault;

Described MME notifies described whole subscriber equipment again to initiate the first tracing section updating TAU process;

After receiving the TAU process that described whole subscriber equipmenies initiate again, described MME sends a TAU to described whole subscriber equipmenies and accepts message, a wherein said TAU accepts message, and to be used to indicate described the first switching network be unavailable or fault, to described at least part of business is switched to described the second switching network.

3. method according to claim 2, is characterized in that, also comprises:

Described MME receives the second abnormality detection result of the first switching network, and described the second abnormality detection result is used to indicate described the first switching network and recovers from fault;

The state that described MME arranges described the first switching network is available or recovers from fault;

Described MME notifies described whole subscriber equipment to initiate the 2nd TAU process;

After receiving the 2nd TAU process of described whole subscriber equipmenies initiations, described MME sends described the 2nd TAU to described whole subscriber equipmenies and accepts message, described the 2nd TAU accepts message to be used to indicate described the first switching network is available or recovers from fault, to described at least part of business is switched back to described the first switching network.

4. method according to claim 1, it is characterized in that, if described the first abnormality detection result is indicated described the first switching network overload, described at least part of subscriber equipment is the certain customers' equipment under described MME, described at least part of business is the partial service that described CS network and described IMS network are all supported, described MME is toggled to small part subscriber equipment initiating updating of tracking area process according to described the first abnormality detection result, so that business switches to the second switching network by the first switching network at least partly, comprising:

The state that described MME arranges described the first switching network is overload;

Described MME registers to the first switching network and the second switching network according to the different subscriber equipment of default ratio setting;

Described MME notifies certain customers' equipment corresponding to described partial service again to initiate the first tracing section updating TAU process;

After receiving the TAU process that described certain customers equipment initiates again, described MME sends a TAU to described certain customers equipment and accepts message, a wherein said TAU accept message be used to indicate described the first switching network be unavailable or overload, to described partial service is switched to described the second switching network, make different subscriber equipmenies adopt described the first switching network or described the second switching network transport service according to described ratio.

5. method according to claim 4, is characterized in that, also comprises:

Described MME receives the second abnormality detection result of the first switching network, and described the second abnormality detection result is used to indicate described the first switching network and recovers from overload;

The state that described MME arranges described the first switching network is overload recovery;

Described MME arranges described certain customers equipment to described the first switching network registration;

Described MME notifies described certain customers equipment to initiate the 2nd TAU process;

After receiving the 2nd TAU process of described certain customers equipment initiation, send described the 2nd TAU to described certain customers equipment and accept message, described the 2nd TAU accept message be used to indicate described the first switching network be available or from overload recover, to described partial service is switched back to described the first switching network.

6. according to the method described in any one in claim 1 to 5, it is characterized in that, described Mobility Management Entity MME receives the first abnormality detection result of the first switching network, specifically comprises:

Described MME receives the information notice request that attaching position register/home subscriber server HLR/HSS sends, and described information notice request comprises described the first abnormality detection result.

7. according to the method described in any one in claim 1 to 5, it is characterized in that, described the second switching network is described CS network, and described the first switching network is described IMS network, described Mobility Management Entity MME receives the first abnormality detection result of the first switching network, specifically comprises:

Described MME receives the more new bearer request that the public data network gateway P-GW in described IMS network sends, and described more new bearer request comprises described the first abnormality detection result.

8. according to the method described in any one in claim 1 to 5, it is characterized in that, described the second switching network is described IMS network, and described the first switching network is described CS network, described Mobility Management Entity MME receives the first abnormality detection result of the first switching network, specifically comprises:

Described MME receives the information notice request that the media gateway MGW in described CS network sends, and described information notice request comprises described the first abnormality detection result.

9. a method for transport service, is characterized in that, comprising:

Detection entity in the first switching network detects extremely to the first switching network, obtains the first abnormality detection result, and it is abnormal that wherein said the first abnormality detection result is used to indicate described the first switching network;

Described detection entity sends described the first abnormality detection result to Mobility Management Entity MME, so that described MME is toggled to small part subscriber equipment initiating updating of tracking area process according to described the first abnormality detection result, so that at least part of business corresponding to subscriber equipment switches to the second switching network from described the first switching network at least partly, wherein said the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, described the second switching network is another in described CS network and described IMS network, described business is the business that described CS network and described IMS network are all supported.

10. method according to claim 9, is characterized in that, described detection entity is attaching position register/home subscriber server HLR/HSS, and described detection entity sends described the first abnormality detection result to MME, comprising:

Described HLR/HSS sends information notice request to described MME, and described information notice request comprises described the first abnormality detection result.

11. methods according to claim 10, is characterized in that, also comprise:

In the situation that determining described the first switching network fault, the call routing that described HLR/HSS is called subscriber by described at least part of subscriber equipment is to the second switching network.

12. methods according to claim 10, is characterized in that, also comprise:

Described HLR/HSS determines as described at least part of subscriber equipment of called subscriber whether register according to described the first switching network;

The in the situation that described HLR/HSS registering according to described the second switching network at definite described at least part of subscriber equipment or do not register according to described the first switching network, the call routing using described at least part of subscriber equipment as called subscriber is to described the second switching network.

13. methods according to claim 10, is characterized in that, also comprise:

The in the situation that described HLR/HSS registering or do not register according to second network according to described the first switching network at definite described at least part of subscriber equipment, the call routing using described at least part of subscriber equipment as called subscriber is to described the first switching network.

14. methods according to claim 9, it is characterized in that, described the first switching network is described IMS network, described the second switching network is described CS network, described detection entity is the public data network gateway P-GW in described IMS network, described detection entity sends described the first abnormality detection result to Mobility Management Entity MME, comprising:

Described P-GW sends more new bearer request by gateway S-GW to described MME, and described more new bearer request comprises described the first abnormality detection result,

Detection entity in wherein said the first switching network detects extremely to the first switching network, comprising:

Whether described P-GW detects Session Border Controller SBC or Proxy Call Session Control Function P-CSCF entity in described IMS network abnormal, wherein at described SBC or described P-CSCF entity abnormal in the situation that, described the first abnormality detection result indicates described the first switching network abnormal.

15. according to the method described in claim 9 or 14, it is characterized in that, also comprises:

Described detection entity detects extremely to the first switching network, obtains the second abnormality detection result, and wherein said the second abnormality detection result is used to indicate the recovery from abnormal of described the first switching network;

Described detection entity sends described the second abnormality detection result to described MME.

16. methods according to claim 9, it is characterized in that, described the first switching network is described CS network, described the second switching network is described IMS network, described detection entity is the media gateway MGW in described CS network, described detection entity sends described the first abnormality detection result to Mobility Management Entity MME, comprising:

Described MGW sends information notice request to described MME, and described information notice request comprises described the first abnormality detection result.

The method of 17. 1 kinds of transport services, is characterized in that, comprising:

The in the situation that of the first switching network fault or overload, the notice of again initiating the first tracing section updating TAU process that subscriber equipment receiving mobility management entity MME sends;

Described subscriber equipment is initiated the first tracing section updating process according to described notice;

Described subscriber equipment receives described MME and accepts message according to a TAU of described the first tracing section updating process transmission, a wherein said TAU accepts message, and to be used to indicate described the first switching network be unavailable or fault, to described at least part of business is switched to the second switching network, described the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, described the second switching network is another in described CS network and described IMS network, and described business is the business that described CS network and described IMS network are all supported.

18. methods according to claim 17, is characterized in that, also comprise:

Described subscriber equipment receives the notice of again initiating the second tracing section updating TAU process that described MME sends;

Described subscriber equipment is initiated the second tracing section updating process according to the described notice of again initiating the second tracing section updating TAU process;

Described subscriber equipment receives described MME and accepts message according to the 2nd TAU of described the second tracing section updating process transmission, wherein said the 2nd TAU accept message be used to indicate described the first switching network be available or from fault or overload recover, to described at least part of business is switched back to described the first switching network.

The method of 19. 1 kinds of transport services, is characterized in that, comprising:

Whether the overload condition that detects IMS network exceedes default threshold value;

Exceed default threshold value in the overload condition of described IMS network, notice detects IMS network over loading described in entity, so that described detection entity is determined described IMS network over loading according to described notice.

20. methods according to claim 19, is characterized in that, described detection entity is public data network gateway P-GW, and described method is carried out by the Session Border Controller SBC in described IMS network or Proxy Call Session Control Function P-CSCF entity.

21. methods according to claim 19, is characterized in that, described detection entity is attaching position register/home subscriber server HLR/HSS, wherein

Described method is carried out by the telecommunication voice application server in described IMS network;

Or,

Described method is carried out by the query call conversation control function I-CSCF in described IMS network or service call conversation control function S-CSCF entity;

Or,

Described method is carried out by described HLR/HSS.

22. 1 kinds of devices for transport service, is characterized in that, comprising:

Receiver module, for receiving the first abnormality detection result of the first switching network, it is abnormal that described the first abnormality detection result is used to indicate described the first switching network;

Handover module, be toggled to small part subscriber equipment initiating updating of tracking area process for the first abnormality detection result receiving according to described receiver module, so that at least part of business corresponding to described at least part of subscriber equipment switches to the second switching network by the first switching network, wherein said the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, described the second switching network is another in described CS network and described IMS network, and described business is the business that described CS network and described IMS network are all supported.

23. devices according to claim 22, it is characterized in that, if described the first abnormality detection result is indicated described the first switching network fault, described at least part of subscriber equipment is the whole subscriber equipmenies under described MME, described at least part of business is whole business that described CS network and described IMS network are all supported, the state that described handover module arranges described the first switching network is unavailable or fault, notify described whole subscriber equipment again to initiate the first tracing section updating TAU process, and after receiving the TAU process that described whole subscriber equipment initiates again, send a TAU to described whole subscriber equipmenies and accept message, a wherein said TAU accepts message, and to be used to indicate described the first switching network be unavailable or fault, to described whole business are switched to described the second switching network.

24. devices according to claim 23, is characterized in that, described receiver module also receives the second abnormality detection result of the first switching network, and described the second abnormality detection result is used to indicate described the first switching network and recovers from fault; The state that described handover module arranges described the first switching network is available or recovers from fault, and wherein said device also comprises:

Sending module, for notifying described whole subscriber equipment to initiate the 2nd TAU process; After receiver module receives the 2nd TAU process of described whole subscriber equipmenies initiations, send described the 2nd TAU to described whole subscriber equipmenies and accept message, described the 2nd TAU accepts message to be used to indicate described the first switching network is available or recovers from fault, to described at least part of business is switched back to described the first switching network.

25. devices according to claim 22, it is characterized in that, if described the first abnormality detection result is indicated described the first switching network overload, described at least part of subscriber equipment is the certain customers' equipment under described MME, described at least part of business is the partial service that described CS network and described IMS network are all supported, the state that described handover module arranges described the first switching network is overload, and register to the first switching network and the second switching network according to the subscriber equipment that default ratio setting is different, notification section subscriber equipment is initiated the first tracing section updating TAU process again, after receiving the TAU process that described certain customers equipment initiates again, described MME sends a TAU to described certain customers equipment and accepts message, a wherein said TAU accept message be used to indicate described the first switching network be unavailable or overload, to described partial service is switched to described the second switching network, make different subscriber equipmenies adopt described the first switching network or described the second switching network transport service according to described ratio.

26. devices according to claim 25, is characterized in that, described receiver module also receives the second abnormality detection result of the first switching network, and described the second abnormality detection result is used to indicate described the first switching network and recovers from overload; The state that described handover module arranges described the first switching network is overload recovery; Described MME arranges described certain customers equipment to described the first switching network registration, and wherein said device also comprises:

Sending module, be used for notifying described certain customers equipment to initiate the 2nd TAU process, and after described receiver module receives the 2nd TAU process of described certain customers equipment initiation, send described the 2nd TAU to described certain customers equipment and accept message, described the 2nd TAU accept message be used to indicate described the first switching network be available or from overload recover, to described partial service is switched back to described the first switching network.

27. according to the device described in any one in claim 22 to 26, it is characterized in that, described receiver module receives the information notice request that attaching position register/home subscriber server HLR/HSS sends, and described information notice request comprises described the first abnormality detection result.

28. according to the device described in any one in claim 22 to 26, it is characterized in that, described the second switching network is described CS network, described the first switching network is described IMS network, described receiver module receives the more new bearer request that the public data network gateway P-GW in described IMS network sends, and described more new bearer request comprises described the first abnormality detection result.

29. according to the device described in any one in claim 22 to 26, it is characterized in that, described the second switching network is described IMS network, described the first switching network is described CS network, described receiver module receives the information notice request that the media gateway MGW in described CS network sends, and described information notice request comprises described the first abnormality detection result.

The device of 30. 1 kinds of transport services, is characterized in that, comprising:

Detection module, for to extremely the detecting of the first switching network, obtains the first abnormality detection result, and it is abnormal that wherein said the first abnormality detection result is used to indicate described the first switching network;

Sending module, described in sending to Mobility Management Entity MME, detect that the first abnormality detection result detecting is toggled to small part subscriber equipment initiating updating of tracking area process, so that at least part of business corresponding to subscriber equipment switches to the second switching network from described the first switching network at least partly, wherein said the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, described the second switching network is another in described CS network and described IMS network, described business is the business that described CS network and described IMS network are all supported.

31. devices according to claim 30, it is characterized in that, described device is attaching position register/home subscriber server HLR/HSS, and described sending module sends information notice request to described MME, and described information notice request comprises described the first abnormality detection result.

32. devices according to claim 30, is characterized in that, also comprise:

Routing module, in the situation that determining described the first switching network fault, the call routing that is called subscriber by described at least part of subscriber equipment is to the second switching network.

33. devices according to claim 30, is characterized in that, also comprise:

Whether determination module, register according to the first switching network for determining as described at least part of subscriber equipment of called subscriber;

Routing module, at definite described at least part of subscriber equipment according to the second switching network registration or according to the first switching network registration in the situation that, the call routing using described at least part of subscriber equipment as called subscriber is to described the second switching network.

34. devices according to claim 30, is characterized in that, also comprise:

Routing module, in the situation that definite described at least part of subscriber equipment is registered or do not register according to second network according to the first switching network, the call routing using described at least part of subscriber equipment as called subscriber is to described the first switching network.

35. devices according to claim 30, it is characterized in that, described the first switching network is described IMS network, described the second switching network is described CS network, described device is the public data network gateway P-GW in described IMS network, described sending module sends more new bearer request by gateway S-GW to described MME, described more new bearer request comprises described the first abnormality detection result, whether described detection module detects Session Border Controller SBC or Proxy Call Session Control Function P-CSCF entity in described IMS network abnormal, wherein at described SBC or P-CSCF entity abnormal in the situation that, described the first abnormality detection result indicates described the first switching network abnormal.

36. according to the device described in claim 30 or 35, it is characterized in that, described detection module also, to extremely the detecting of the first switching network, obtains the second abnormality detection result, and wherein said the second abnormality detection result is used to indicate the recovery from abnormal of described the first switching network; Described detection module also sends described the second abnormality detection result to described MME.

37. devices according to claim 30, it is characterized in that, described the first switching network is described CS network, described the second switching network is described IMS network, described device is the media gateway MGW in described CS network, described sending module sends information notice request to described MME, and described information notice request comprises described the first abnormality detection result.

The device of 38. 1 kinds of transport services, is characterized in that, comprising:

Receiver module, for the first switching network fault or the overload in the situation that, the notice of again initiating the first tracing section updating TAU process that receiving mobility management entity MME sends;

Sending module, initiates the first tracing section updating process for the described notice receiving according to described receiver module;

Described receiver module is also accepted message for receiving described MME according to a TAU of described the first tracing section updating process transmission, a wherein said TAU accepts message, and to be used to indicate described the first switching network be unavailable or fault, to described at least part of business is switched to the second switching network, described the first switching network is one of circuit switching (CS) network and internet protocol multi-media system IMS network, described the second switching network is another in described CS network and described IMS network, described business is the business that described CS network and described IMS network are all supported.

39. according to the device described in claim 38, it is characterized in that the notice of again initiating the second tracing section updating TAU process that described receiver module also sends for receiving described MME;

Described sending module is also for initiating the second tracing section updating process according to the described notice of again initiating the second tracing section updating TAU process;

Described receiver module is also accepted message for receiving described MME according to the 2nd TAU of described the second tracing section updating process transmission, wherein said the 2nd TAU accept message be used to indicate described the first switching network be available or from fault or overload recover, to described at least part of business is switched back to described the first switching network.

The device of 40. 1 kinds of transport services, is characterized in that, comprising:

Whether detection module, exceed default threshold value for detection of the overload condition of IMS network;

Notification module, for detecting that at described detection module the overload condition of IMS network exceedes default threshold value, notice detects IMS network over loading described in entity, so that described detection entity is determined described IMS network over loading according to described notice.

41. according to the device described in claim 40, it is characterized in that, described detection entity is public data network gateway P-GW, and described device is Session Border Controller SBC or the Proxy Call Session Control Function P-CSCF entity in described IMS network.

42. according to the device described in claim 40, it is characterized in that, described detection entity is attaching position register/home subscriber server HLR/HSS, and wherein said device is the telecommunication voice application server in described IMS network; Or described device is query call conversation control function I-CSCF or the service call conversation control function S-CSCF entity in described IMS network, or described device is carried out by described HLR/HSS.