WO2014127637A1 - Procédé et dispositif de transmission de services - Google Patents

Procédé et dispositif de transmission de services Download PDF

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Publication number
WO2014127637A1
WO2014127637A1 PCT/CN2013/084748 CN2013084748W WO2014127637A1 WO 2014127637 A1 WO2014127637 A1 WO 2014127637A1 CN 2013084748 W CN2013084748 W CN 2013084748W WO 2014127637 A1 WO2014127637 A1 WO 2014127637A1
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Prior art keywords
network
switching network
mme
ims
switching
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PCT/CN2013/084748
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English (en)
Chinese (zh)
Inventor
陶烨
叶进洲
刘海洋
孙晓姬
孙晓
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华为技术有限公司
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Publication of WO2014127637A1 publication Critical patent/WO2014127637A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/005—Multiple registrations, e.g. multihoming

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and apparatus for transmitting a service.
  • the first is the Circuit Switched Fallback (CSFB) technology.
  • LTE only provides data services. When a voice call is initiated or accepted, it falls back to the Circuit Switching (CS) domain for processing.
  • the CSFB technology is suitable as a transition solution before the IP Multimedia System (IMS) deployment; or it can also be used to solve the voice call problem of the LTE user terminal roaming scenario, no IMS is deployed on the visited network, or the IMS roaming protocol has not yet been deployed.
  • IMS IP Multimedia System
  • CSFB technology can provide voice services for roaming LTE users.
  • the second is LTE and Simultaneous Voice and LTE (SVLTE) technology.
  • User terminals work in both LTE and CS modes.
  • the former provides data services and the latter provides voice services.
  • the third is to use OTT (Over-the-top) technology, which is to implement LTE voice service by OTT technology.
  • the fourth is the voice over LTE (VOLTE) technology of the base station, and the VoLTE is based on IMS.
  • IMS has become the core architecture standard for the all-IP era due to its support for multiple access and rich multimedia services. After years of development and maturity, IMS has become the mainstream choice for fixed voice, and has also been identified by 3GPP and GSMA as the standard architecture for mobile voice.
  • IMS-based VoLTE is the inevitable result of the development of wireless and core network technologies.
  • the CS network is a mature voice and short message communication network, while the service processing (voice and short message service) in the VoLTE solution is based on the IMS network.
  • the IMS network After deploying new mobile features, the IMS network generally takes a period of time to operate stably. In the initial stage of VoLTE network deployment, if the entire IMS network is abnormal, it will cause service loss.
  • Embodiments of the present invention provide a method and apparatus for transmitting a service, which can avoid or reduce a loss of traffic when an abnormality occurs in an IMS network or a CS network.
  • the first aspect provides a method for transmitting a service, where: the mobility management entity MME receives a first abnormality detection result of the first switching network, where the first abnormality detection result is used to indicate that the first switching network is abnormal;
  • the abnormality detection result triggers at least part of the user equipment to initiate a tracking area update process, so that at least part of the service corresponding to at least part of the user equipment is switched from the first switching network to the second switching network, where the first switching network is a circuit switched CS network and an Internet protocol.
  • One of the multimedia system IMS networks, the second switching network is another one of the CS network and the IMS network, and the service is a service supported by both the CS network and the IMS network.
  • the first abnormality detection result indicates that the first switching network is faulty
  • at least part of the user equipment is all user equipments in the MME
  • at least part of the services are the CS network and the IMS network.
  • the MME triggers at least a part of the user equipment to initiate the tracking area update process according to the first abnormality detection result, so that at least part of the service corresponding to at least part of the user equipment is switched from the first switching network to the second switching network, including: MME setting The status of the first switching network is unavailable or faulty; the MME notifies all user equipments to re-initiate the first tracking area update TAU procedure; after receiving the first TAU procedure re-initiated by all user equipments, the MME sends the first to all user equipments.
  • the TAU accepts a message, wherein the first TAU accept message is used to indicate the first The switching network is unavailable or faulty in order to switch at least part of the traffic to the second switching network.
  • the method of the first aspect further includes: receiving, by the MME, a second abnormality detection result of the first switching network, where the second abnormality detection result is used to indicate the first The switching network recovers from the failure; the MME sets the state of the first switching network to be available or recovers from the failure; the MME notifies all user equipments to initiate the second TAU procedure; after receiving the second TAU procedure initiated by all user equipments, the MME All user equipments send a second TAU accept message, the second TAU accept message is used to indicate that the first switching network is available or recovers from the fault, so as to switch at least part of the traffic back to the first switching network.
  • the MME triggers the at least part of the user equipment to initiate the tracking area update process according to the first abnormality detection result, so that at least part of the service is switched from the first switching network to the second switching network, and the MME includes: setting, by the MME, the status of the first switching network.
  • the MME sets the different user equipments to register with the first switching network and the second switching network according to a preset ratio; the MME notifies the part of the user equipment corresponding to the part of the service to re-initiate the first tracking area to update the TAU process; After the device re-initiates the first-TAU procedure, the MME sends a first-TAU accept message to the part of the user equipment, where the first TAU accept message is used to indicate that the first switching network is unavailable or overloaded, so as to switch part of the service to the second exchange.
  • Network enabling different user devices to be used proportionally A second switching network or switching network traffic transmission.
  • the method of the first aspect further includes: the MME receiving a second abnormality detection result of the first switching network, where the second abnormality detection result is used to indicate the first
  • the switching network recovers from the overload; the MME sets the state of the first switching network to be overloaded; the MME sets part of the user equipment to register with the first switching network; the MME notifies the part of the user equipment to initiate the second TAU process; and receives the partial user equipment initiated After the second TAU process, the second TAU accept message is sent to the part of the user equipment, and the second TAU accept message is used to indicate the first switching network.
  • the network is available or recovers from an overload to switch part of the traffic back to the first switched network.
  • the mobility management entity MME receives the first abnormality detection result of the first switching network, specifically: the MME receives the home location register / The information notification request sent by the home subscriber server HLR/HSS, the information notification request including the first abnormality detection result.
  • the second switching network is a CS network
  • the first switching network is an IMS network
  • the mobility management entity MME receives the first exchange
  • the first abnormal detection result of the network includes: receiving, by the MME, an update bearer request sent by the public data network gateway P-GW in the IMS network, where the update bearer request includes the first abnormality detection result.
  • the second switching network is an IMS network
  • the first switching network is a CS network
  • the mobility management entity MME receives the first exchange.
  • the first abnormality detection result of the network specifically includes: the MME receives an information notification request sent by the media gateway MGW in the CS network, where the information notification request includes the first abnormality detection result.
  • the second aspect provides a method for transmitting a service, including: detecting, by a detecting entity in the first switching network, an abnormality of the first switching network, and obtaining a first abnormal detecting result, where the first abnormal detecting result is used to indicate a switching network abnormality; the detecting entity sends a first abnormality detection result to the mobility management entity MME, so that the MME triggers at least part of the user equipment to initiate a tracking area update process according to the first abnormality detection result, so that at least part of the service corresponding to at least part of the user equipment Switching from the first switching network to the second switching network, wherein the first switching network is one of a circuit switched CS network and an internet protocol multimedia system IMS network, and the second switching network is another one of the CS network and the IMS network, and the service is CS Services supported by both the network and the IMS network.
  • the detecting entity is a home location register/home subscriber server HLR/HSS, and the detecting entity sends the first abnormality detection result to the MME, including: The HLR/HSS sends an information notification request to the MME, and the information notification request includes the first abnormality detection result.
  • the method of the second aspect further includes: in determining the first switching network failure, the HLR/HSS is to at least part of the user equipment The call for the called subscriber is routed to the second switching network.
  • the method of the second aspect further includes: determining, by the HLR/HSS, whether at least part of the user equipment that is the called user is in accordance with the first switching network The HLR/HSS routes the call of at least part of the user equipment as the called user to the second switching network in determining that at least some of the user equipments are registered according to the second switching network or are not registered according to the first switching network.
  • the method of the second aspect further includes: determining, by the HLR/HSS, whether at least part of the user equipment that is the called user is in accordance with the first switching network The HLR/HSS routes the call of at least part of the user equipment as the called user to the first switching network in determining that at least some of the user equipments are registered according to the first switching network or are not registered according to the second network.
  • the first switching network is an IMS network
  • the second switching network is a CS network
  • the detecting entity is a public data network gateway in the IMS network.
  • the P-GW the detecting entity sends the first abnormality detection result to the mobility management entity MME, where the P-GW sends an update bearer request to the MME through the serving gateway S-GW, where the update bearer request includes the first abnormality detection result, where the first
  • the detecting entity in the switching network detects the abnormality of the first switching network, and includes: the P-GW detects whether the session border controller SBC or the proxy call session control function P-CSCF entity in the IMS network is abnormal, where the SBC or the P- In the case that the CSCF entity is abnormal, the first abnormality detection result indicates that the first switching network is abnormal.
  • the method of the second aspect further includes: detecting, by the detecting entity, the abnormality of the first switching network, and obtaining the second An abnormality detection result, where the second abnormality detection result is used to indicate that the first switching network is abnormal Recovery; the detecting entity sends a second abnormality detection result to the MME.
  • the first switching network is a CS network
  • the second switching network is an IMS network
  • the detecting entity is a media gateway MGW in the CS network
  • the detecting entity is to the mobility management entity MME.
  • Sending the first abnormality detection result includes: The MGW sends an information notification request to the MME, where the information notification request includes an abnormality detection result.
  • a method for transmitting a service In a case that the first switching network is faulty or overloaded, the user equipment receives a notification that the mobility management entity MME sends a re-initiation process of updating the first tracking area to update the TAU; The notification initiates a first tracking area update process; the user equipment receives a first TAU accept message sent by the MME according to the first tracking area update process, where the first TAU accept message is used to indicate that the first switching network is unavailable or faulty, so that at least Part of the service is switched to the second switching network, the first switching network is one of a circuit switched CS network and an internet protocol multimedia system IMS network, and the second switching network is another one of the CS network and the IMS network, and the service is a CS network and an IMS network. All supported businesses.
  • the method of the third aspect further includes: receiving, by the user equipment, a notification that the second tracking area update TAU process is re-initiated by the MME; the user equipment re-initiates the second tracking area according to The notification of the update TAU process initiates a second tracking area update process; the user equipment receives a second TAU accept message sent by the MME according to the second tracking area update process, where the second TAU accept message is used to indicate that the first switching network is available or faulty Or recover from overload to switch at least part of the traffic back to the first switched network.
  • the fourth aspect provides a method for transmitting a service, including: detecting whether an overload condition of an IMS network exceeds a preset threshold; and if the overload condition of the IMS network exceeds a preset threshold, notifying the detection entity that the IMS network is overloaded, In order for the detecting entity to determine the IMS network overload based on the notification.
  • the detecting entity is a public data network gateway P-GW, and the method is performed by a session border controller SBC or a proxy call session control function P-CSCF entity in the IMS network.
  • the detecting entity is a home location register
  • HLR / HSS Home subscriber server HLR / HSS, where the method is performed by the telecom voice application server in the IMS network; or, the method is performed by the Query Call Session Control Function I-CSCF or the Serving Call Session Control Function S-CSCF entity in the IMS network; or , Method is performed by HLR/HSS.
  • the fifth aspect provides an apparatus for transmitting a service, including: a receiving module, configured to receive a first abnormality detection result of the first switching network, where the first abnormality detection result is used to indicate that the first switching network is abnormal; And the at least part of the user equipment initiates a tracking area update process according to the first abnormality detection result received by the receiving module, so that at least part of the service corresponding to at least part of the user equipment is switched from the first switching network to the second switching network, where the first The switching network is one of a circuit switched CS network and an Internet Protocol multimedia system IMS network, and the second switching network is another one of the CS network and the IMS network, and the service is a service supported by both the CS network and the IMS network.
  • the switching module sets the state of the first switching network to be unavailable or faulty, notifies all user equipments to re-initiate the first tracking area update TAU procedure, and after receiving the first TAU procedure re-initiated by all user equipments, The first TAU accept message is sent to all user equipments, where the first TAU accept message is used to indicate that the first switching network is unavailable or faulty, so as to switch all services to the second switching network.
  • the receiving module further receives a second abnormality detection result of the first switching network, where the second abnormality detection result is used to indicate that the first switching network recovers from the fault
  • the switching module sets the state of the first switching network to be available or recovers from the fault
  • the device further includes: a sending module, configured to notify all user equipments to initiate a second TAU procedure; and the receiving module receives the second initiated by all user equipments After the TAU procedure, a second TAU accept message is sent to all user equipments, the second TAU accept message is used to indicate that the first switched network is available or recovers from the fault, in order to switch at least part of the traffic back to the first switched network.
  • the switching module sets the state of the first switching network to be overloaded, and sets different user equipments to register with the first switching network and the second switching network according to a preset ratio, and notifies some user equipments to re-initiate the first tracking area.
  • the MME sends a first TAU accept message to the part of the user equipment after the first TAU process is re-initiated by the user equipment, where the first TAU accept message is used to indicate that the first switching network is unavailable or overloaded.
  • the different user equipments use the first switching network or the second switching network to transmit services in proportion.
  • the receiving module further receives a second abnormality detection result of the first switching network, where the second abnormality detection result is used to indicate that the first switching network recovers from the overload
  • the switching module sets the state of the first switching network to be overloaded; the MME sets a part of the user equipment to register with the first switching network, where the device further includes: a sending module, configured to notify a part of the user equipment to initiate the second TAU process, and in the receiving module After receiving the second TAU procedure initiated by the part of the user equipment, sending a second TAU accept message to the part of the user equipment, where the second TAU accept message is used to indicate that the first switching network is available or recovers from the overload, so as to switch part of the service back.
  • the first switching network is configured to notify a part of the user equipment to initiate the second TAU process
  • the receiving module is configured to receive the information notification request sent by the home location register/home subscriber server HLR/HSS, and the information notification The request contains the first anomaly detection result.
  • the second switching network is a CS network
  • the first switching network is an IMS network
  • the receiving module receives the public data in the IMS network.
  • the update bearer request sent by the network gateway P-GW, and the update bearer request includes the first abnormality detection result.
  • the second switching network is an IMS network
  • the first switching network is a CS network
  • the receiving module receives an information notification request sent by the media gateway MGW in the CS network, where the information notification request includes the first abnormality detection result.
  • the sixth aspect provides a device for transmitting a service, including: a detecting module, configured to detect an abnormality of the first switching network, to obtain a first abnormal detecting result, where the first abnormal detecting result is used to indicate the first switching network
  • the sending module is configured to send the detected first abnormality detection result to the mobility management entity MME, and trigger at least part of the user equipment to initiate a tracking area update process, so that at least part of the service corresponding to at least part of the user equipment is switched from the first switch.
  • the network switches to the second switching network, where the first switching network is one of a circuit switched CS network and an internet protocol multimedia system IMS network, and the second switching network is another one of the CS network and the IMS network, and the service is a CS network and an IMS network All supported businesses.
  • the device is a home location register/home subscriber server HLR/HSS
  • the sending module sends an information notification request to the MME, where the information notification request includes the first abnormality detection result.
  • the apparatus of the sixth aspect further includes: a routing module, configured to, in the case of determining that the first switching network is faulty, at least partially The user equipment routes the call of the called user to the second switching network.
  • the apparatus of the sixth aspect further includes: a determining module, configured to determine whether at least part of the user equipment that is the called user is in accordance with the first a switching network, configured to: route, by the routing module, a call of at least part of the user equipment as the called user to the second switching network, if it is determined that at least part of the user equipment is registered according to the second switching network or is not registered according to the first switching network .
  • a determining module configured to determine whether at least part of the user equipment that is the called user is in accordance with the first a switching network, configured to: route, by the routing module, a call of at least part of the user equipment as the called user to the second switching network, if it is determined that at least part of the user equipment is registered according to the second switching network or is not registered according to the first switching network .
  • the apparatus of the sixth aspect further includes: a determining module, configured to determine whether at least part of the user equipment that is the called user is in accordance with the first Switching network registration; a routing module, configured to determine at least part of the user equipment according to the When a switched network is registered or not registered according to the second network, a call of at least part of the user equipment as the called user is routed to the first switching network.
  • the first switching network is an IMS network
  • the second switching network is a CS network
  • the device is a public data network gateway P in the IMS network.
  • the sending module sends an update request to the MME through the serving gateway S-GW
  • the update bearer request includes a first abnormality detection result
  • the detecting module detects the session border controller SBC or the proxy call session control function P-CSCF entity in the IMS network Whether the abnormality is abnormal, wherein in the case that the SBC or the P-CSCF entity is abnormal, the first abnormality detection result indicates that the first switching network is abnormal.
  • the detecting module further detects an abnormality of the first switching network, and obtains a second abnormality detecting result, where the second The abnormality detection result is used to indicate that the first switching network recovers from the abnormality; the detecting module also
  • the MME sends a second abnormality detection result.
  • the first switching network is a CS network
  • the second switching network is an IMS network
  • the device is a media gateway MGW in the CS network
  • the sending module sends an information notification request to the MME.
  • the information notification request contains the first abnormality detection result.
  • the seventh aspect provides an apparatus for transmitting a service, where: the receiving module is configured to: when the first switching network is faulty or overloaded, receive a re-initiation of the first tracking area update TAU process sent by the mobility management entity MME a sending module, configured to initiate a first tracking area update process according to the notification received by the receiving module, where the receiving module is further configured to receive a first TAU accept message sent by the MME according to the first tracking area update process, where the first TAU accept message And indicating that the first switching network is unavailable or faulty, so as to switch at least part of the service to the second switching network, where the first switching network is one of a circuit switched CS network and an Internet Protocol multimedia system IMS network, and the second switching network is a CS Another of the network and IMS networks, the services are services supported by both the CS network and the IMS network.
  • the receiving module is further configured to receive, by the MME, a notification that the second tracking area update TAU process is re-initiated; the sending module is further configured to The notification of initiating the second tracking area update TAU process initiates a second tracking area update process; the receiving module is further configured to receive a second TAU accept message sent by the MME according to the second tracking area update process, where the second TAU accept message is used to indicate A switched network is available or recoverable from a fault or overload to switch at least part of the traffic back to the first switched network.
  • the eighth aspect provides a device for transmitting a service, including: a detecting module, configured to detect whether an overload condition of the IMS network exceeds a preset threshold; and a notification module, configured to: when the detecting module detects that an overload condition of the IMS network exceeds a pre- In the case of the threshold, the detection entity IMS network is overloaded so that the detection entity determines that the IMS network is overloaded according to the notification.
  • the detecting entity is a public data network gateway P-GW
  • the device is a session border controller SBC or a proxy call session control function P-CSCF entity in the IMS network.
  • the detecting entity is a home location register/home subscriber server HLR/HSS, where the device is a telecom voice application server in the IMS network; or, the device is a query in the IMS network.
  • the embodiment of the present invention may be supported by the mobility management entity, when detecting that one of the IMS network and the CS network is faulty, by triggering at least part of the user equipment to re-initiate the tracking area update process, and supporting at least part of the user equipment, the IMS and the CS.
  • the service is handed over to another of the IMS network and the CS network for processing, thereby avoiding or reducing traffic loss caused by one of the IMS network and the CS network failure.
  • FIG. 1 is a block diagram of a communication system 100 in accordance with an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of a method of transmitting a service according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method of transmitting a service according to another embodiment of the present invention.
  • 4 is a schematic flow chart of a method of transmitting a service according to still another embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a method of transmitting a service according to still another embodiment of the present invention.
  • 6 is a schematic flow chart of a process of transmitting a service according to an embodiment of the present invention.
  • FIG. 7 is a schematic flow chart of a CSFB calling procedure according to an embodiment of the present invention.
  • Figure 8 is a schematic flow chart of the CSFB called flow of an embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of a process of transmitting a service according to another embodiment of the present invention.
  • FIG. 10 is a schematic flowchart of processing a called flow according to a VoLTE manner according to an embodiment of the present invention.
  • FIG. 11 is a schematic flow chart of processing a called flow in a VoLTE manner according to an embodiment of the present invention.
  • FIG. 12 is a schematic flowchart of a process of transmitting a service according to another embodiment of the present invention.
  • FIG. 13 is a schematic flowchart of a process of transmitting a service according to still another embodiment of the present invention.
  • Figure 14 is a block diagram showing the structure of an apparatus for transmitting a service according to an embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of an apparatus for transmitting a service according to another embodiment of the present invention.
  • FIG. 16 is a schematic structural diagram of an apparatus for transmitting a service according to still another embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of an apparatus for transmitting a service according to still another embodiment of the present invention.
  • Figure 18 is a block diagram showing the structure of an apparatus for transmitting a service according to an embodiment of the present invention.
  • FIG. 19 is a schematic structural diagram of an apparatus for transmitting a service according to another embodiment of the present invention.
  • 20 is a schematic structural diagram of an apparatus for transmitting a service according to still another embodiment of the present invention.
  • Figure 21 is a block diagram showing the structure of an apparatus for transmitting a service according to still another embodiment of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced long term evolution
  • the system, the UMTS Universal Mobile Telecommunication System
  • the embodiment of the present invention will be described by taking an LTE network as an example. Different network elements can be included in the system.
  • the network elements of the radio access network in the LTE and the LTE-A include an eNB (eNodeB, an evolved base station), and the network elements of the radio access network in the WCDMA include an RNC (Radio Network Controller) and a NodeB, similar to Other wireless networks, such as WiMax (Worldwide Interoperability for Microwave Access), may also use a scheme similar to the embodiment of the present invention.
  • the related modules in the system may be different, and the embodiment of the present invention may be different. It is not limited, but for convenience of description, the following embodiments will be described by taking an eNodeB as an example.
  • the user equipment includes but is not limited to a mobile station (MS, Mobile Station), a mobile terminal (Mobile Terminal), a mobile telephone (Mobile Telephone), a mobile phone (handset). And a portable device (ortable equipment), etc., the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular" Telephone), a computer with wireless communication function, etc., the user equipment can also be portable, pocket, handheld, meter
  • the MSC can be used in the traditional CS network.
  • the schemes such as the pool (POOL) implement the redundancy and load sharing of the MSC.
  • the N+1 scheme and the IMS pool scheme can be used to implement redundancy and load sharing of each network element in the IMS.
  • the cost of the system is increased.
  • Embodiments of the present invention propose a scheme for achieving mutual redundancy and load sharing between a CS network and an IMS network.
  • FIG. 1 is a block diagram showing the architecture of a communication system 100 in accordance with an embodiment of the present invention.
  • the communication system 100 of the embodiment of the present invention is a communication system in which the CSFB technology and the VoLTE technology coexist, wherein the network elements of the CS domain (or network) 160 may include a Mobile Switch Center (MSC) 161 and an MGW 162, and support CSFB functions. .
  • the network element of the IMS domain may include a Call Session Control Function (CSCF131), an AS 132, a Media Gateway Control Function (MGCF) 133, a Session Border Controller (SBC), or a proxy.
  • CSCF Proxy-CSCF, P-CSCF
  • the EPC network 120 includes an MME 121, an S-GW (Serving Gateway)/P-GW 122, and a PCRF to support VoLTE functions.
  • communication system 140 may also include an HLR/HS S 140.
  • the LTE user terminal 110 can register with the CS network according to the CSFB mode, so as to transmit services such as voice and/or short message through the CS domain, or can register with the IMS network according to the VoLTE manner, so as to transmit voice and/or short message through the IMS domain. .
  • FIG. 2 is a schematic flow chart of a method of transmitting a service according to an embodiment of the present invention.
  • the embodiment of Figure 2 is implemented by the MME of Figure 1, including the following.
  • the mobility management entity MME receives a first abnormality detection result of the first switching network, where the first abnormality detection result is used to indicate that the first switching network is abnormal.
  • the abnormality may include an abnormal condition such as a failure or overload of the switching network.
  • the switching network failure may mean that at least one network element failure of the switching network causes the entire switching network to be faulty, so that the switching network cannot provide services normally.
  • the overload of the switching network may indicate that the CPU usage, call success rate, QoS detection, and the like of some devices of the switching network exceed the normal range, for example, exceed a preset threshold, so that the switching network cannot provide services normally.
  • the MME triggers the at least part of the user equipment to initiate the tracking area update process according to the first abnormality detection result, so that at least part of the service corresponding to at least part of the user equipment is switched from the first switching network to the second switching network, where the first switching network is a circuit.
  • One of the CS network and the Internet Protocol Multimedia System IMS network is exchanged, and the second switching network is the other one of the CS network and the IMS network, and the service is a service supported by both the CS network and the IMS network.
  • the MME may receive an abnormality detection result indicating an abnormality of the IMS network from the detecting entity, and re-initiate the tracking area by triggering the UE.
  • the update process switches at least part of the service (for example, the service corresponding to at least part of the user equipment) from the IMS network to the CS network for service processing, that is, switching from the VoLTE processing service to the CSFB processing service.
  • the MME may receive an abnormality detection result indicating the abnormality of the CS network, and trigger the user equipment to re-initiate the tracking area update process to at least part of the service (for example, Corresponding to the service of at least part of the user equipments, the service processing by the CS network is switched to the service processing by the IMS network, that is, the service is switched from the CSFB mode processing industry to the service VoLTE mode.
  • the services supported by both the CS network and the IMS network may refer to voice, video, and/or short message services that are supported by the CSFB-capable CS network and the VoIMS-enabled IMS network.
  • the MME may switch the corresponding service of all user equipments in the MME to the second switching network for processing.
  • the MME may perform services corresponding to some user equipments under the MME. Switching to the second switching network for processing, and The other part of the reserved service is processed in the first switching network.
  • the embodiment of the present invention may be supported by the mobility management entity, when detecting that one of the IMS network and the CS network is faulty, by triggering at least part of the user equipment to re-initiate the tracking area update process, and supporting at least part of the user equipment, the IMS and the CS.
  • the service is handed over to another of the IMS network and the CS network for processing, thereby avoiding or reducing traffic loss caused by one of the IMS network and the CS network failure.
  • the MME sets the state of the first switching network to be unavailable or faulty; the MME notifies at least part of the user equipment to re-initiate the first tracking area update TAU procedure; after receiving the first TAU procedure initiated by at least part of the user equipment re-initiation, the MME At least a portion of the user equipment sends a first-TAU accept message, where the first TAU accept message is used to indicate that the first switched network is unavailable or faulty to switch at least part of the traffic to the second switched network.
  • the first TAU accept message may include an IMS Voice over PS session supported indication (IMS) message, and the cell may be set to False when the first switched network fails.
  • IMS IMS Voice over PS session supported indication
  • the MME may notify the user equipment to re-initiate the TAU process by using the following procedure: 1) Globally Unique Temporary Identity (GUTI) redistribution process, where the notification may carry a new GUTI (New GUTI) and an invalid TA A list (TA List) to trigger the UE to re-initiate the TAU; (2) an EPS detach procedure, wherein the notification carries a re-attach request indication to trigger the UE to re-initiate the TAU.
  • GUI Globally Unique Temporary Identity
  • TA List invalid TA A list
  • the CS network with the CSFB function and the IMS network with the VoLTE function support the voice service and/or the short message service.
  • the MME notifies all users under the management of the IMS network when it determines that the IMS network is faulty.
  • the device re-initiates the first tracking area update TAU procedure. Since the MME sets the state of the IMS network to be unavailable or faulty, all users are set.
  • the device will register with the CS network in the CSBF mode to switch the voice service and/or short message service of the user who originally processed the service through the IMS network to the CS network.
  • the failover of the embodiment of the present invention acts as a redundancy, avoiding the loss of service due to the inability to provide voice services and/or short message services in the event of an IMS network failure.
  • the method of FIG. 2 further includes: receiving, by the MME, a second abnormality detection result of the first switching network, where the second abnormality detection result is used to indicate that the first switching network recovers from the fault; The status of a switched network is available or recovers from the fault; the MME notifies all user equipments to initiate the second TAU procedure; after receiving the second TAU procedure initiated by all user equipments, the MME sends a second TAU accept message to all user equipments, The second TAU accept message is used to indicate that the first switched network is available or recovers from a failure to switch at least part of the traffic back to the first switched network.
  • the second TAU accept message may include an IMS Voice over PS session supported indication (IMS) message, and the cell may be set to True when the first switched network fails.
  • IMS IMS Voice over PS session supported indication
  • both the CS network and the IMS network support the voice service and/or the short message service.
  • the MME determines that the IMS network is faulty, the MME notifies all the user equipments under its management to re-initiate the first tracking.
  • the zone updates the TAU process. Since the MME can make the state of the first switching network available or recover from the fault, all user equipments can register with the IMS network in the VoLTE manner, so that the voice service and/or short message service of the user who originally processed the service through the CS network under the MME is performed. Switch to processing via the IMS network. In this way, when the faulty IMS network recovers, the service is switched to the IMS network for processing, so that the IMS network can be used in time to provide users with high-quality services.
  • the MME sets the state of the first switching network to be overloaded;
  • the MME sets different user equipments to register with the first switching network and the second switching network according to a preset ratio; the MME notifies some user equipments to re-initiate the first tracking area update TAU procedure; and receives the first TAU re-initiated by some user equipments.
  • the MME sends a first T AU accept message to a part of the user equipment, where the first T AU accept message is used to indicate that the first switching network is unavailable or overloaded, so as to switch part of the service to the second switching network, so that different The user equipment transmits the service in proportion to the first switching network or the second switching network.
  • the MME may set the user equipment to register with the CS network in CSBF mode or register with the IMS network in VoLTE mode.
  • the MME may notify some of the user equipments under management to re-initiate the first tracking area update TAU process.
  • the MME sets the user equipment to register with the first switching network and the second switching network according to a preset ratio, that is, the MME sets the part of the user equipment to register according to the second switching network, and the other part of the user equipment still registers with the first switching network. Therefore, some of the user equipments are registered in the CSBF manner to the CS network, so that the voice service and/or short message service of some users who originally processed the service through the IMS network under the MME are switched to be processed through the CS network.
  • the MME can switch part of the user equipment that originally transmitted the service through the first switching network to the second switching network, thereby performing load sharing and avoiding service loss due to IMS overload.
  • the method of FIG. 2 further includes: receiving, by the MME, a second abnormality detection result of the first switching network, where the second abnormality detection result is used to indicate that the first switching network recovers from the overload;
  • the status of a switching network is overload recovery;
  • the MME sets part of the user equipment to register with the first switching network;
  • the MME notifies some user equipments to initiate the second TAU procedure; after receiving the second TAU procedure initiated by some user equipments, to the partial user equipment
  • a second TAU accept message is sent, the second TAU accept message is used to indicate that the first switched network is available or recovers from an overload to switch part of the traffic back to the first switched network.
  • both the CS network and the IMS network support voice services and/or short message services to the IMS network.
  • the MME informs all user equipments under its management to re-initiate the first tracking area update TAU process when it determines that the IMS network is overloaded. Since the MME restores the state of the first switching network to the available or overloaded, all user equipments will register with the IMS network in the VoLTE manner, thereby the voice service and/or short message service of the user who originally processed the service through the CS network under the MME. Switch to processing via the IMS network. In this way, when the faulty IMS network recovers, the service is switched to the IMS network in time, so that the IMS network can be used in time to provide high-quality services for users.
  • the MME receives an information notification request sent by the home location register/home subscriber server HLR/HSS, and the information notification request includes the first abnormality detection result.
  • the information notification request may be an extended Info-Notify-Reqeust message carrying an IMS network status cell or a network CS status cell for indicating a switching network failure, recovery, and overload. , abnormal recovery (resume) and other abnormal detection results.
  • the MME may also reply to the HLR/HSS with a message notification response.
  • the information notification response can be an extended Info-Notify-Answer message.
  • Info-Notify-Reqeust messages and Info-Notify-Answer messages can be sent over the S6a/S6d interface.
  • the second switching network is a CS network
  • the first switching network is an IMS network
  • the MME receives an update bearer request sent by the public data network gateway P-GW in the IMS network, and updates the bearer request. Contains the first abnormality detection result.
  • the MME receives an extended UPDATE BEARER Request message sent by the public data network gateway P-GW in the IMS network through the S-GW, and the Private Extension in the extended UPDATE BEARER Request message includes a switched network failure (eg, IMS Failure or CS) Failure ) Indicates or exchanges network overload (eg, IMS Overload) indications.
  • the P-GW can send the extended UPDATE BEARER Request message to the S-GW through the S5/S8 interface.
  • the S-GW can send the extended UPDATE BEARER Request message to the MME through the SI1 interface.
  • the second switching network is an IMS network
  • the first switching network is a CS network
  • the MME receives an information notification request sent by the media gateway MGW in the CS network, where the information notification request includes the first abnormality detection result.
  • FIG. 3 is a schematic flowchart of a method of transmitting a service according to another embodiment of the present invention.
  • the embodiment of Fig. 3 is executed by the P-GW or HLR/HSS of Fig. 1, corresponding to the embodiment of Fig. 2, and will not be described again.
  • the detecting entity in the first switching network detects the abnormality of the first switching network, and obtains a first abnormality detecting result, where the first abnormal detecting result is used to indicate that the first switching network is abnormal.
  • the detecting entity sends the first abnormality detection result to the mobility management entity MME, so that the MME triggers at least part of the user equipment to initiate the tracking area update process according to the first abnormality detection result, so that at least part of the service corresponding to at least part of the user equipment is from the first
  • the switching network switches to the second switching network, where the first switching network is one of a circuit switched CS network and an internet protocol multimedia system IMS network, and the second switching network is another one of the CS network and the IMS network, and the service is a CS network and an IMS Business supported by the network.
  • the embodiment of the present invention may be supported by the mobility management entity, when detecting that one of the IMS network and the CS network is faulty, by triggering at least part of the user equipment to re-initiate the tracking area update process, and supporting at least part of the user equipment, the IMS and the CS.
  • the service is handed over to another of the IMS network and the CS network for processing, thereby avoiding or reducing traffic loss caused by one of the IMS network and the CS network failure.
  • the detecting entity is a home location register/home subscriber server HLR/HSS, and in 320, the HLR/HSS sends an information notification request to the MME, the information notification request including the first abnormality detection result.
  • the method of FIG. 3 further includes: in the case of determining that the first switching network is faulty, the HLR/HSS routes the call of the at least part of the user equipment to the called user to the second switching network.
  • the method of FIG. 3 further includes: determining, by the HLR/HSS, as the called party Whether at least part of the user equipment of the subscriber is registered according to the first switching network; the HLR/HSS determines at least part of the user equipment as the called subscriber if it determines that at least part of the user equipment is registered according to the second switching network or is not registered according to the first switching network. The call is routed to the second switching network.
  • the method of FIG. 3 further includes: determining, by the HLR/HSS, whether at least part of the user equipments of the called user are registered according to the first switching network; and determining, by the HLR/HSS, that at least part of the user equipments are in accordance with the first If the switching network registers or does not register according to the second network, the call of at least part of the user equipment as the called user is routed to the first switching network.
  • the first switching network is an IMS network
  • the second switching network is a CS network
  • the detecting entity is a public data network gateway P-GW in the IMS network
  • the P-GW passes the serving gateway S-
  • the GW sends an update bearer request to the MME, where the update bearer request includes a first abnormality detection result, where, in 330, the P-GW detects whether the session border controller SBC or the proxy call session control function P-CSCF entity in the IMS network is abnormal. Where the SBC or the P-CSCF entity is abnormal, the first abnormality detection result indicates that the first switching network is abnormal.
  • the P-GW parses the message, determines that the SBC (P-CSCF) is overloaded, and expands the S5/S8 interface by updating the request.
  • the (Update bearer Request) message notifies the S-GW of the IMS overload.
  • the method further includes: the method further includes: detecting, by the detecting entity, an abnormality of the first switching network, to obtain a second abnormality detecting result, where the second abnormal detecting result is used to indicate the first
  • the switching network recovers from the abnormality; the detecting entity sends a second abnormal detection result to the MME.
  • the first switching network is a CS network
  • the second switching network is an IMS network
  • the detecting entity is a media gateway MGW in the CS network.
  • the MGW sends an information notification request to the MME, where the information notification request includes An abnormal detection result.
  • FIG. 4 is a schematic flow chart of a method of transmitting a service according to still another embodiment of the present invention.
  • the embodiment of FIG. 4 is executed by the user equipment of FIG. 1 and corresponds to the embodiment of FIG. 2, and details are not described herein again.
  • the user equipment receives the mobility management.
  • the user equipment initiates a first tracking area update process according to the notification.
  • the user equipment receives a first-TAU accept message sent by the MME according to the first tracking area update process, where the first TAU accept message is used to indicate that the first switching network is unavailable or faulty, so as to switch at least part of the service to the second exchange.
  • the network, the first switching network is one of a circuit switched CS network and an Internet Protocol multimedia system IMS network
  • the second switching network is another one of a CS network and an IMS network
  • the service is a service supported by both the CS network and the IMS network.
  • the embodiment of the present invention may be supported by the mobility management entity, when detecting that one of the IMS network and the CS network is faulty, by triggering at least part of the user equipment to re-initiate the tracking area update process, and supporting at least part of the user equipment, the IMS and the CS.
  • the service is handed over to another of the IMS network and the CS network for processing, thereby avoiding or reducing traffic loss caused by one of the IMS network and the CS network failure.
  • the method of FIG. 4 further includes: receiving, by the user equipment, a notification that the second tracking area update TAU procedure is re-initiated by the MME; the user equipment is initiated according to the notification of re-initiating the second tracking area update TAU procedure. a second tracking area update process; the user equipment receives a second TAU accept message sent by the MME according to the second tracking area update process, where the second TAU accept message is used to indicate that the first switching network is available or recovers from a fault or an overload, so that Switching at least part of the traffic back to the first switching network.
  • FIG. 5 is a schematic flowchart of a method of transmitting a service according to still another embodiment of the present invention.
  • the embodiment of Figure 5 is performed by the SBC, P-CSCF, S-CSCF or I-CSCF of Figure 1, corresponding to the methods of Figures 2 and 3, and will not be further described herein.
  • overload condition of the IMS network exceeds a preset threshold, notify the detecting entity that the IMS network is overloaded, so that the detecting entity determines that the IMS network is overloaded according to the notification.
  • Embodiments of the present invention may be detected by the mobility management entity in one of the IMS network and the CS network
  • the mobility management entity in one of the IMS network and the CS network
  • at least part of the user equipment to re-initiate the tracking area update process
  • at least part of the user equipment corresponding to the IMS and the CS support services are switched to another one of the IMS network and the CS network for processing, thereby avoiding or reducing Loss of business when one of the IMS network and the CS network fails.
  • an entity in the IMS network determines whether the IMS is overloaded by detecting at least one of its CPU usage, call success rate, QoS detection, and the like, and notifies the detection entity of the determination result to the detection entity through the extension interface.
  • the method for determining the overload of the embodiment of the present invention may include: 1) determining whether the CPU usage of the entity exceeds a certain threshold, determining an IMS overload if the CPU usage exceeds a certain threshold; 2) successfully monitoring the VoLTE call. Rate, it can be counted whether the VoLTE call success rate is lower than a certain threshold, and the IMS overload is determined when the VoLTE call success rate is lower than a certain threshold.
  • the mobility management entity when detecting that one of the IMS network and the CS network is faulty, may switch at least part of the services supported by the IMS and the CS to the IMS by triggering at least part of the user equipment to re-initiate the tracking area update process.
  • the other of the network and the CS network processes to avoid or reduce the loss of traffic in the event of a failure of one of the IMS network and the CS network.
  • the detecting entity is a public data network gateway P-GW, and the method of Fig. 5 is performed by a session border controller SBC or a proxy call session control function P-CSCF entity in the IMS network.
  • the SBC or P-CSCF can notify the P-GW IMS network overload through an extended interface (such as SIP INFO).
  • the P-GW after receiving the notification, the P-GW returns 200 OK to the SBC or P-CSCF.
  • the detecting entity is a home location register/home subscriber server HLR/HSS, wherein the method of Figure 5 is performed by a telecommunications voice application server in the IMS network.
  • the telecommunication voice application server when the notification detection entity IMS network is overloaded, notifies the HLR/HSS of the IMS network overload by the information notification request.
  • HLR/HSS to telecom voice applications The server returns a message notification response.
  • the detecting entity is a home location register / home subscriber server
  • the method of Figure 5 is performed by the Incoming Call Session Control Function I-CSCF or the Serving Call Session Control Function S-CSCF entity in the IMS network; or, the method of Figure 5 is performed by the HLR/HSS.
  • the I-CSCF or S-CSCF when the notification detection entity IMS network is overloaded, notifies the HLR/HSS of the IMS network overload through the information notification request.
  • the HLR/HSS returns a message notification response to the I-CSCF or S-CSCF.
  • the HLR/HSS can determine whether the number of User-Data-Request (UDR) or User-Data- Answer (UDA) messages received from the TAS within a unit time is greater than a certain threshold, and the threshold is greater than This threshold determines the IMS overload.
  • UDR User-Data-Request
  • UDA User-Data- Answer
  • IMS network overload is taken as an example in the above embodiment, for the CS network overload, a similar method can be used to detect the CS network overload.
  • FIG. 6 is a schematic flow chart of a process of transmitting a service according to an embodiment of the present invention.
  • the implementation of Figure 6 is an example of the embodiment of Figures 2 through 5.
  • the scenario of the VoLTE fault is described, that is, the IMS network fault that carries the VoLTE is detected, and the service processing by the IMS network is switched to the service processing by the CS network, that is, the service is processed by the CSFB method.
  • the fault detection logic entity or the network element detects the fault of the IMS network, and the logic entity can be implemented on the HLR/HSS or the P-GW.
  • the HLR/HSS or P-GW used for fault detection may notify the MME that VoLTE is not available or that the IMS network is unavailable.
  • the MME sets the indication of the unavailability of the VoLTE or the IMS network, and notifies the UE to initiate the TAU by using the Globally Unique Temporary Identity (GUTI) reallocation process or the EPS detach detach procedure, that is, instructing the UE to initiate the joint TAU (for example, Combined TAU with IMSI attach or Combined TAU) process, and subsequent processing of services using CSFB.
  • GUI Globally Unique Temporary Identity
  • HLR/HSS detects IMS fault condition. For example, HLR/HSS detection (Monitor) to Each signaling link (eg, a TDM link or an IP link) of a Telephony Application Server (TAS) fails and continues for a period of time.
  • TDM link e.g., a TDM link or an IP link
  • TAS Telephony Application Server
  • HLR/HSS detects IMS fault conditions. For example, the HLR/HSS detects that each signaling link (e.g., IP link) of the I-CSCF or S-CSCF is faulty and continues for a period of time.
  • each signaling link e.g., IP link
  • step 610 is an alternative to step 605.
  • the HLR/HSS determines the IMS network failure according to the detection result, and notifies the MME of the IMS failure by using an Info-Notify message. Based on the 3GPP 29.272 standard, the extended Info-Notify message is shown in Tables 1 and 2 below.
  • User-Id includes the leading digits of an IMSI (ie MCC, MNC, leading digits of MSIN) and it shall identify the set of subscribers whose IMSIs begin with the User-Id.
  • the HSS may include this information element if the occurred failure is Limited to subscribers identified by one or more User-Ids. ).
  • Network Element Network-Elem 0 This cell contains the Type ent-Type network element that is the initiator of the message (This IE shall contain the
  • Network element type Network Element which originates this message
  • IMS Network State IMS-Network- 0 If present, this cell contains the status of the IMS network (IMS Network Status) State, for example, IMS failure, IMS failure,
  • IMS overload or IMS recovery (If present, this information element shall contain the state of IMS Network,
  • IMS failure IMS recovery, IMS overload, IMS resume.
  • the MME returns an information notification response (Info-Notify Answer) message to the HLR/HSS.
  • Info-Notify messages are shown in Tables 1 and 2 below.
  • Table 3 Info-Notify Answer Network Element Network-Elem 0 This cell contains the network element that is the initiator of the message Type ent-Type (This IE shall contain the
  • Network element type Network Element which originates this message
  • IMS Network State IMS-Network- 0 If present, this cell contains the status of the IMS network (IMS network status) State network, eg IMS failure, IMS failure, IMS overload or IMS recovery (If present, this information element shall Contain the state of IMS Network ).
  • Result Result-Code 1 M This cell contains the result of this operation.
  • Result - Experimental-code AVP is used to indicate the Diameter base Result
  • Experiment - Result AVP is used for S6a, S6d errors.
  • This is a grouped VAP that contains the 3GPP Vendor ID in the Vendor-Id AVP and the error code in the Experiment-Result-Code AVP. There is no applicable experiment in this command - the result - This IE shall contain the result of the operation.
  • the Result-Code AVP shall be used to indicate success 1 errors as defined in the Diameter Base Protocol.
  • the Experimental-Result AVP shall be used for S6a/S6d errors. This is a Grouped A VP which shall contain the 3 GPP Vendor ID in the Vendor-Id A VP, and the error code in the Experimental-Result-Code AVP.
  • the P-GW detects the IMS fault condition. For example, the P-GW uses the ICMP echo/ICMP response (Response) message to detect the SBC (P-CSCF) using the Packet Internet Grope (PING) mechanism. It is detected that all SBCs (P-CSCFs) connected to the P-GW are faulty and continue for a while.
  • ICMP echo/ICMP response Response
  • PING Packet Internet Grope
  • the P-GW detects all SBC (P-CSCF) failures, and notifies the S-GW of the IMS failure by using an extended Update Bearer Request message on the S5/S8 interface.
  • P-CSCF SBC
  • the extended update bearer request message is as shown in Tables 4 and 5 below (for clarity, only the contents of the Private Extension cell are shown).
  • Private Extension is coded as shown in Table 5.
  • the Private Extension contains an IMS Failure indication.
  • the S-GW notifies the MME of the IMS failure by using an extended Update Bearer Request message on the S11 interface. Based on 3GPP 29.274, Extended Update Bearer Request Message See Table 4 and Table 5.
  • the MME sets VoIMS unavailable, and returns an Update Bearer Response to the S-GW.
  • the S-GW returns an update bearer response to the P-GW.
  • the MME may notify the UE to re-initiate the TAU by using the following process:
  • the GUTI Reallocation Command message carries a new GUTI (New GUTI) and an invalid TA list (Invalid TA List), triggering the UE to initiate a TAU, and the following steps are heavily weighted by GUTI.
  • the allocation process is described as an example.
  • the EPS detach procedure carries a re-attach request indication message, triggering the UE to initiate a TAU.
  • the UE returns a GUTI Reallocation Complete (GUTI Reallocation Complete) message to the MME.
  • GUI Reallocation Complete GUTI Reallocation Complete
  • the UE immediately initiates a TAU procedure to the MME.
  • the MME returns a TAU Accept (TAU Accept) message, where the TAU accepts (TAU Accept)
  • TAU Accept The support for the IMS Voice over PS session supported Indication message in the message is set to False.
  • the UE receives the TAU Accept message, determines that the IMS Voice over PS session is unavailable according to the TAU accept message, and initiates a network TAU request message, and sends a TAU Request message to the MME to indicate The joint EPS/IMSI TAU procedure, where the parameters indicate that the UE has the CS Fallback capability.
  • the MME processes the TAU request.
  • the MME sends an SGsAP-LOCATION-UPDATE-REQUEST message to the VLR, where the message includes a new Location Area Identity (LAI), a Temporary Mobile Subscriber Identity (IMSI), and an MME name (MME name). And parameters such as Location Update Type, where the MM name is the domain name of the MME.
  • LAI Location Area Identity
  • IMSI Temporary Mobile Subscriber Identity
  • MME name MME name
  • Location Update Type where the MM name is the domain name of the MME.
  • the VLR stores the MME information, and creates an association with the SGs interface of the user under the MME.
  • the VLR initiates a location update process to the HLR based on the user information and location area information.
  • the VLR returns an SGsAP-LOCATION-UPDATE-ACCEPT message to the MME. If the VLR supports TMSI re-allocation, the message includes the parameters LAI and TMSI. If the VLR does not support the TMSI re-allocation, the message includes the parameters LAI and IMSI.
  • the MME performs a subsequent service process of the TAU.
  • FIG. 7 is a schematic flow chart of a CSFB calling procedure according to an embodiment of the present invention.
  • the user registers according to the CSFB mode, and the subsequent service processing is processed according to the CSFB mode.
  • the UE initiates a CS Fallback voice service request.
  • the MME sends an S1-AP request message (for example, an S1-AP UE CONTEXT MODIFICATION REQUEST message) to the eNodeB, where the message includes a CS Fallback Indicator.
  • the message indicates that the eNodeB needs to fall back to the CS Fallback service.
  • the eNodeB requests the UE to start the cell measurement of the system, and obtains the measurement report reported by the UE, and determines the target cell to be redirected.
  • the target system specific wireless configuration information is then sent to the UE, and the RRC connection is released.
  • the UE accesses the target system cell, and initiates a service request (CM Service Request) of the CS domain.
  • CM Service Request a service request of the CS domain.
  • the IMS server may retrieve the implicit location update process because there is no information about the UE. Accept user requests.
  • the MSC server does not support implicit location update, and the MSC server does not have user data (i.e., the serving MSC server is different from the EPS/IMSI registered MSC server), the user's service request is rejected.
  • the UE If the MSC Server rejects the user's service request, the UE initiates a CS domain location update procedure.
  • Figure 8 is a schematic flow chart of the CSFB called flow of an embodiment of the present invention.
  • the calling user source can have the following three situations:
  • the calling subscriber from the CS/PSTN (Public Switched Telephone Network) network calls the VoLTE subscriber of the IMS network (registered according to CSFB).
  • CS/PSTN Public Switched Telephone Network
  • the calling subscribers from other IMS networks call the VoLTE subscribers of the faulty IMS network (according to CSFB registration).
  • the current interworking of the two IMS networks is generally transferred through the CS network, then the calling IMS network will be out through the MGCF, and then Route to the GMSC.
  • the calling subscribers from other IMS networks call the VoLTE subscribers of the faulty IMS network (according to CSFB registration). If the interworking of the two IMS networks is implemented by IBCF/IBGF, the IBCF configuration is required because the called IMS network has failed.
  • the primary and secondary routes that is, the primary route to the IMS failure, can be connected to the CS using the backup route and then routed to the GMSC. 810.
  • the GMSC Global Mobile Switching Center
  • IAM identity and access management
  • the GMSC sends an SRI (Send Routing Information) to the HLR/HSS.
  • SRI Send Routing Information
  • the HLR/HSS determines, according to the embodiment in FIG. 6, that the IMS has failed, and is called
  • the VoLTE user's call is processed according to the CS process.
  • the MSRN Mobile Station Roaming Number
  • the call is routed to the CS network, and the call is no longer anchored to the IMS domain for processing.
  • the MSC/VLR server receives the IAM incoming message.
  • the MSC/VLR server sends according to the existing SGs association and MME information.
  • the SGsAP-P AGING-REQUEST message is sent to the MME, and the message includes IMSI, TMSI, service indicator, LAC, and the like.
  • the MME sends a paging (Paging) message to the eNodeB.
  • Paging paging
  • the eNodeB initiates an air interface Paging process.
  • the UE establishes a connection and sends an extended service request (Extended Service Request) message to the MME.
  • extended service request Extended Service Request
  • the MME sends an SGsAP-SERVICE-REQUEST message to the MSC/VLR server.
  • the MSC server receives the message and no longer resends the paging request message to the MME.
  • the MSC/VLR server receives the SGs service request message containing the idle state indication, first notifies the calling party, and the call is in the process of being connected.
  • the MME sends an Initial UE Context Setup message to the eNodeB, where the message includes a CS Fallback indicator.
  • the message indicates to the eNodeB that the UE needs to fall back to UTRAN/GERAN due to the CSFB service.
  • the UE switches from E-UTRAN to UTRAN/GERAN.
  • the UE returns a paging response (Paging Response)
  • Paging Response The information or location update request message is sent to the MSC server.
  • the MSC/VLR After receiving the paging response of the UE, the MSC/VLR establishes a CS connection.
  • FIG. 9 is a schematic flowchart of a process of transmitting a service according to another embodiment of the present invention.
  • the implementation of Figure 9 is an example of the embodiment of Figures 2 through 5.
  • the scenario of the VoLTE overload is described.
  • the overload detection logic entity or the network element detects the fault of the IMS network, and the logical entity can be implemented on the HLR/HSS or the P-GW.
  • the HLR/HSS or P-GW for overload detection can notify the MME of the overload of the VoLTE mode.
  • the MME performs the VoLTE/CSFB mode TAU for the terminal according to the ratio, that is, uses the CSFB for the VoLTE traffic offload.
  • HLR/HSS detection IMS overload or P-GW detection IMS overload as long as one test is established, the IMS is considered overloaded.
  • TAS overloads the IMS through the Sh interface to the HLR/HSS.
  • the IMS Overload (Overlaod) is notified to the HLR/HSS via an Info-Notify message.
  • the extended Info-Notify message is as follows:
  • HLR/HSS returns an Info-Notify Answer message.
  • the CSCF reports that the IMS is overloaded through the Cx/Dx interface, and notifies the HLR/HSS of the IMS Overlaod through the Info-Notify message.
  • Extended Info-Notify based on 3GPP 29.228/29.229
  • steps 915 and 920 are an alternate step to steps 905 and 910.
  • the HLR/HSS judges that the IMS is overloaded, and notifies the MME of the IMS overload through the Info-Notify message.
  • the message definition is shown in Table 1, and the message content definition is shown in Table 2 and Table 3.
  • the MME returns an Info-Notify Answer message to the HLR/HSS. 935, P-GW detects SBC (P-CSCF) overload condition.
  • SBC SBC
  • P-CSCF detects an overload (e.g., at least one of the CPU usage, call success rate, QoS detection, and the like of the SBC), and notifies the P-GW through an extended interface (e.g., SIP INFO).
  • the method for judging the overload is as follows.
  • the SBC can calculate whether the success rate of the VoLTE call is lower than a certain threshold, and determine the IMS overload if the VoLTE call success rate is lower than a certain threshold.
  • the SBC can obtain a Qos of a certain LTE cell call below a certain threshold based on RTCP (RTP Control Protocol) and call statistics.
  • RTCP RTP Control Protocol
  • the P-GW returns a 200 OK to the SBC (P-CSCF) as a response to the SIP INFO;
  • the P-GW After intercepting the SIP INFO message, the P-GW parses the message, determines that the SBC (P-CSCF) is overloaded, and notifies the S-GW of the IMS overload by using an extended Update Bearer Request message on the S5/S8 interface. See Tables 4 and 5 for extended messages based on 3GPP 29.274.
  • the follow-up is the current standard process for LTE/EPC/VoLTE registration.
  • the S-GW notifies the MME of the IMS overload by using an extended update bearer request message on the S11 interface. See Tables 4 and 5 for extended messages based on 3GPP 29.274.
  • the MME sets the VoIMS overload and returns an Update Bearer Response message to the S-GW.
  • the S-GW returns an update bearer response message to the P-GW.
  • the MME sets the user to register in the VoLTE mode/CSFB mode according to the ratio. 970.
  • the subsequent service processing is processed according to the VoLTE method/CSFB method according to the situation of the user registration.
  • the UE delivers the INVITE message to the IMS network through the bearer channel of the eNodeB/S-GW/P-GW, for example, to the P-CSCF.
  • the SBC (P-CSCF) processes the INVITE message and forwards it to the S-CSCF.
  • the S-CSCF triggers the TAS to process the calling service through the INVITE message. After the TAS processes the calling service, it returns the INVITE to the S-CSCF to continue routing.
  • the IMS is overloaded, so that the VoLTE load is shared by the CSFB, and the CSFB called process is similar to the embodiment of FIG. 8, and details are not described herein again.
  • the HLR/HSS determines that the current user has no VoLTE/SRVCC registration (ie, does not support IMS-Voice-Over-PS-Sessions)
  • the VoLTE user's call is in accordance with CS. Process processing. For example, the direct acquisition MSRN is returned to the GMSC, and the call is no longer anchored to the IMS domain for processing.
  • FIG. 10 is a schematic flowchart of processing a called flow according to a VoLTE manner according to an embodiment of the present invention.
  • the calling user source and the called user relationship may include the following.
  • the calling subscribers from other IMS networks call the VoLTE subscribers of the overloaded IMS network (according to VoLTE registration).
  • the current interworking of the two IMS networks is generally transferred through the CS network, then the calling IMS network will be out through the MGCF, and then Route to the GMSC, see the flow of Figure 10.
  • the GMSC receives the IAM incoming message.
  • the GMSC sends an SRI to the HLR/HSS. 1030, HLR/HSS determines that the current user is a VoLTE/SRVCC registration (ie, supports IMS-Voice-Over-PS-Sessions), and the call of the VoLTE user is processed according to the VoLTE process, for example, returning anchor data (T-CSI) to the GMSC. .
  • HLR/HSS determines that the current user is a VoLTE/SRVCC registration (ie, supports IMS-Voice-Over-PS-Sessions)
  • T-CSI anchor data
  • the GMSC sends an IDP (Initial DP) to the TAS (for example, Anchor AS) for intelligent triggering.
  • IDP Initial DP
  • TAS for example, Anchor AS
  • Anchor AS returns the IMRN number to the GMSC by changing the number.
  • the GMSC routes the call to the IMS for processing according to the new IMRN number.
  • FIG. 11 is a schematic flow chart of processing a called flow in a VoLTE manner according to an embodiment of the present invention.
  • caller source and called user relationship may be included.
  • the calling subscribers from other IMS networks call the VoLTE subscribers of the overloaded IMS network (according to VoLTE registration).
  • the current interworking of the two IMS networks is generally transferred through the CS network, then the calling IMS network will be out through the MGCF, and then Routed to the GMSC (ie, the subsequent scenario of Figure 10 anchoring from CS to IMS call).
  • the called side I/S-CSCF receives the incoming INVITE message.
  • the S-CSCF sends an INVITE to the TAS. 1115.
  • the TAS starts the called access domain selection process to query T-ADS (Terminal Access Domain Selection) to determine which network access the called user is in.
  • T-ADS Terminal Access Domain Selection
  • the HLR/HSS sends a T-ADS query to the MME by using an IDR (Insert Subscriber Data-Request) message.
  • IDR Insert Subscriber Data-Request
  • the MME returns an IDA (Insert Subscriber Data Answer) message carrying the T-ADS result.
  • IDA Insert Subscriber Data Answer
  • the HLR/HSS sends a T-ADS query to the SGSN by using a PSI (provide Subscriber Information) message.
  • PSI Provide Subscriber Information
  • the SGSN returns a PSI-ACK message carrying the T-ADS result.
  • the HLR/HSS returns the T-ADS query result to the TAS through a UDA (User-Data-Avoid) message.
  • UDA User-Data-Avoid
  • the TAS determines, according to the T-ADS, that the current user is in the IMS domain and terminates the call in the IMS domain.
  • the TAS determines from the T-ADS that the current user is in the CS domain and terminates the call in the CS domain.
  • FIG. 12 is a schematic flowchart of a process of transmitting a service according to another embodiment of the present invention.
  • the VoLTE fault recovery scenario detects that the IMS fault recovery is performed on the VoLTE, and the service processing is switched from the CS network to the VoLTE mode.
  • the IMS network is detected by a logical entity or network element for fault recovery detection, and the logical entity can be implemented on the HLR/HSS or the P-GW.
  • the HLR/HSS and P-GW for failover detection notify the MME of VoLTE (Voice Over LTE) availability.
  • the MME sets the VoLTE available indication, and notifies the UE to re-initiate the TAU through the GUTI redistribution process or the Evolved Packet System (EPS) detach procedure, and then uses the VoLTE method to process the service.
  • the HLR/HSS detects the IMS failure recovery and the P-GW detects the IMS failure recovery, that is, the IMS failure recovery is considered.
  • HLR/HSS detects IMS fault recovery conditions. For example, HLR/HSS detects TAS The signaling link (TDM link or IP link) is restored.
  • HLR/HSS detects that the signaling link (IP link) of the I/S-CSCF is restored.
  • step 1210 is an alternative to step 1205.
  • the HLR/HSS determines, according to the detection result, that the IMS determines the IMS network failure recovery, and notifies the MME by using an (IMS-Notify) IMS Recovery (IMS Recovery) message. See Table 1, Table 2, and Table 3 for extended messages and parameters based on 3GPP 29.272.
  • the MME returns an Info-Notify Answer message.
  • the P-GW detects the IMS fault condition. For example, the PGW detects whether the SBC (P-CSCF) fault is recovered through the ICMP echo/ICMP Response or ping mechanism, and detects that all connected SBCs (P-CSCFs) recover.
  • P-CSCF SBC
  • the PGW notifies the S-GW of the IMS failure recovery by using an extended Update Bearer Request message on the S5/S8 interface. See Table 4 and Table 5 for extended messages based on 3GPP 29.274.
  • the S-GW notifies the MME IMS fault recovery through the Update bearer Request message extension on the SI1 interface. See Tables 4 and 5 for extended messages based on 3GPP 29.274.
  • the MME sets the VoIMS fault recovery or available, and returns an Update Bearer Response to the S-GW.
  • the S-GW returns an Update Bearer Response to the P-GW. 1250.
  • the MME may notify the UE to re-initiate the TAU by using the following procedure.
  • the EPS detach procedure carries a re-attach request indication message, triggering the UE to initiate a TAU.
  • the UE returns a GUTI Reallocation Complete message. 1260.
  • the UE immediately initiates a TAU procedure to the MME. 1265.
  • the MME returns a TAU Accept (TAU Accept) message, where the IMS Voice over PS session supported Indication cell in the TAU Accept message is set to True.
  • the UE receives the TAU Accept message, determines that the IMS Voice over PS session is available according to the TAU accept message, initiates a network TAU request, and sends a TAU Request message to the MME.
  • the parameters support SRVCC capability and the voice domain preference is PS (Packet Switched).
  • the MME processes the TAU request, performs subsequent processing of the TAU, and registers according to the VoLTE/SRVCC method.
  • the MME sends a TAU accept message to the UE.
  • FIG. 13 is a schematic flowchart of a process of transmitting a service according to still another embodiment of the present invention.
  • This embodiment describes the scenario of the VoLTE overload recovery.
  • the IMS overload recovery of the 7-port VoLTE is detected, and the service processing is switched back to the VoLTE mode.
  • the IMS network is detected by the overload recovery detection logic entity, and the logic entity can be implemented on the HLR/HSS or the P-GW.
  • the HLR/HSS and P-GW for overload recovery detection notify the MME of the VoLTE overload recovery.
  • the MME attaches the CSFB to the terminal, and notifies the UE to re-initiate the TAU through the GUTI re-distribution process or the EPS detach process, and sets the VoLTE available indication, and then uses the VoLTE method to process the service.
  • the user is registered in the VoLTE mode, and the subsequent service processing is processed according to the VoLTE method.
  • the subsequent service processing is processed in the VoLTE mode as a standard process, and is not described here.
  • HLR/HSS detection IMS overload recovery and / or P-GW detection IMS overload recovery that is, IMS overload recovery.
  • the TAS recovers from the IMS through the Sh interface to the HLR/HSS.
  • the IMS recovery (Resume) is notified to the HLR/HSS by an Info-Notify message.
  • the extended Info-Notify messages and parameters are shown in Table 4. Table 2 and Table 3.
  • HLR/HSS returns an Info-Notify Answer message.
  • the CSCF reports an overload recovery of the IMS through the Cx/Dx interface, and notifies the HLR/HSS to the IMS Resume through the Info-Notify message. See Table 5, Table 2, and Table 3 for extended Info-Notify messages and parameters based on 3GPP 29.228/29.229.
  • HLR/HSS returns a response.
  • the HLR/HSS judges that the IMS overload is restored, and the IMS Resume is notified to the MME by using an Info-Notify message.
  • the MME returns an Info-Notify Answer message to the HLR/HSS.
  • P-GW detects SBC (P-CSCF) overload recovery conditions.
  • the SBC detects overload recovery (for example, by CPU usage/call success rate/QoS detection, etc.) and notifies the PGW through an extended interface (such as SIP INFO).
  • the method for judging the overload recovery is as follows.
  • the SBC can calculate whether the success rate of the VoLTE call is higher than a certain threshold, and determine the IMS overload recovery if the VoLTE call success rate is higher than a certain threshold.
  • the SBC can obtain a Qos of a certain LTE cell call higher than a certain threshold based on RTCP (RTP Control Protocol) and call statistics, and the Qos of a call in an LTE cell is higher than a certain threshold. In case of IMS overload determination.
  • RTCP RTP Control Protocol
  • the specific message body is as follows.
  • the PGW returns 200 OK to the SBC (P-CSCF) as a response of the SIP INFO;
  • the PGW After intercepting the SIP INFO message, the PGW parses the message, determines that the SBC (P-CSCF) is overloaded, and notifies the S-GW IMS overload recovery by using the Update Bearer Request message extension on the S5/S8 interface. See Tables 4 and 5 for extended messages based on 3GPP 29.274.
  • the follow-up is the current standard process for LTE/EPC/VoLTE registration.
  • the S-GW informs the MME that the IMS is overloaded by the extended update bearer request message message on the SI1 interface. See Tables 4 and 5 for extended messages based on 3GPP 29.274;
  • the MME sets the VoIMS overload recovery and returns an update bearer response message to the S-GW.
  • the S-GW returns an update bearer response message to the P-GW.
  • the MME gradually registers the user according to the VoLTE mode, and the subsequent service processing is processed according to the VoLTE method.
  • FIG. 14 is a block diagram showing the structure of an apparatus 1400 for transmitting services according to an embodiment of the present invention.
  • the device 1400 for transmitting traffic includes a receiving module 1410 and a switching module 1420.
  • the receiving module 1410 receives the first abnormality detection result of the first switching network, where the first abnormality detection result is used to indicate that the first switching network is abnormal.
  • the switching module 1420 triggers at least part of the user equipment to initiate a tracking area update process according to the first abnormality detection result received by the receiving module 1410, so that at least part of the service corresponding to at least part of the user equipment is switched from the first switching network to the second switching network, where A switching network is one of a circuit switched CS network and an Internet Protocol multimedia system IMS network, and the second switching network is another one of a CS network and an IMS network, and the service is a service supported by both the CS network and the IMS network.
  • the embodiment of the present invention may be supported by the mobility management entity, when detecting that one of the IMS network and the CS network is faulty, by triggering at least part of the user equipment to re-initiate the tracking area update process, and supporting at least part of the user equipment, the IMS and the CS.
  • the service is handed over to another of the IMS network and the CS network for processing, thereby avoiding or reducing traffic loss caused by one of the IMS network and the CS network failure.
  • the switching module 1420 Setting the state of the first switching network to be unavailable or faulty, notifying all user equipments to re-initiate the first tracking area update TAU procedure, and after receiving the first TAU procedure re-initiated by all user equipments, sending the first to all user equipments
  • the TAU accepts a message, wherein the first TAU accept message is used to indicate that the first switching network is unavailable or faulty in order to switch at least part of the traffic to the second switching network.
  • the receiving module further receives a second abnormality detection result of the first switching network, where the second abnormality detection result is used to indicate that the first switching network recovers from the fault; and the switching module sets the first switching network.
  • the state is available or recoverable from a failure
  • the device 1400 further includes:
  • the sending module 1430 is configured to notify all user equipments to initiate a second TAU process, and receive After receiving the second TAU procedure initiated by all user equipments, the module sends a second TAU accept message to all user equipments, where the second TAU accept message is used to indicate that the first switching network is available or recovers from the fault, so as to at least part of the service. Switch back to the first switched network.
  • the switching module 1420 Set the state of the first switching network to be overloaded, and set different user equipments to register with the first switching network and the second switching network according to a preset ratio, and notify some user equipments to re-initiate the first tracking area update TAU process, and receive the After the user-device re-initiated the first-TAU procedure, the MME sends a first-TAU accept message to the part of the user equipment, where the first TAU accept message is used to indicate that the first switching network is unavailable or overloaded, so as to switch part of the service to the first
  • the two switching networks enable different user equipments to use the first switching network or the second switching network to transmit services in proportion.
  • the receiving module 1410 further receives a second abnormality detection result of the first switching network, where the second abnormality detection result is used to indicate that the first switching network recovers from the overload; and the switching module 1420 sets the first exchange.
  • the state of the network is overload recovery; the MME sets a part of the user equipment to register with the first switching network, where the device 1400 further includes:
  • the sending module 1430 is configured to notify a part of the user equipment to initiate the second TAU process, and after the receiving module receives the second TAU process initiated by the part of the user equipment, send a second TAU accept message to the part of the user equipment, where the second TAU accepts the message. Instructing the first switching network to be available or recovering from an overload to switch part of the traffic back to the first switching network.
  • the receiving module 1410 receives the information notification request sent by the home location register/home subscriber server HLR/HSS, and the information notification request includes the first abnormality detection result.
  • the second switching network is a CS network
  • the first switching network is an IMS network
  • the receiving module 1410 receives an update bearer request sent by the public data network gateway P-GW in the IMS network, where the update bearer request includes the first Abnormal detection result.
  • the second switching network is an IMS network
  • the first switching network is a CS network
  • the receiving module 1410 receives an information notification request sent by the media gateway MGW in the CS network, where the information notification request includes the first abnormality detection result.
  • Figure 15 is a block diagram showing the structure of an apparatus 1500 for transmitting services according to another embodiment of the present invention.
  • the device 1500 for transmitting traffic includes a detection module 1510 and a transmission module 1520.
  • the detecting module 1510 detects the abnormality of the first switching network, and obtains a first abnormality detecting result, where the first abnormal detecting result is used to indicate that the first switching network is abnormal.
  • the sending module 1520 sends the detected first abnormality detection result to the mobility management entity MME, so that the MME triggers at least part of the user equipment to initiate the tracking area update process according to the first abnormality detection result, so that at least part of the at least part of the user equipment corresponds to at least part of the user equipment.
  • the service is switched from the first switching network to the second switching network, where the first switching network is one of a circuit switched CS network and an internet protocol multimedia system IMS network, and the second switching network is another one of the CS network and the IMS network, and the service is Services supported by both the CS network and the IMS network.
  • the embodiment of the present invention may be supported by the mobility management entity, when detecting that one of the IMS network and the CS network is faulty, by triggering at least part of the user equipment to re-initiate the tracking area update process, and supporting at least part of the user equipment, the IMS and the CS.
  • the service is handed over to another of the IMS network and the CS network for processing, thereby avoiding or reducing traffic loss caused by one of the IMS network and the CS network failure.
  • the device 1500 is a home location register/home subscriber server HLR/HSS, and the sending module 1520 sends an information notification request to the MME, the information notification request including the first abnormality detection result.
  • the apparatus 1500 further includes: a routing module 1530.
  • the routing module 1530 in the case of determining that the first switching network is faulty, will at least part of the user equipment The call for the called subscriber is routed to the second switching network.
  • the apparatus 1500 further includes: a determining module 1540 and a routing module 1530.
  • the determining module 1540 determines whether at least a portion of the user equipment as the called user is registered in accordance with the first switching network.
  • the routing module 1530 routes at least a portion of the user equipment as a called user's call to the second switching network in the event that it is determined that at least a portion of the user equipment is registered with the second switching network or not registered with the first switching network.
  • the apparatus 1500 further includes: a determining module 1540 and a routing module 1530.
  • the determining module 1540 determines whether at least a portion of the user equipment as the called user is registered in accordance with the first switching network.
  • the routing module 1530 when determining that at least part of the user equipment is registered according to the first switching network or not registered according to the second network, routes at least part of the user equipment as a called user to the first switching network.
  • the first switching network is an IMS network
  • the second switching network is a CS network
  • the device 1500 is a public data network gateway P-GW in the IMS network
  • the sending module 1520 sends the MME to the MME through the serving gateway S-GW.
  • Updating the bearer request, the update bearer request includes the first abnormality detection result
  • the detecting module 1510 detects whether the session border controller SBC or the proxy call session control function P-CSCF entity in the IMS network is abnormal, where the entity in the SBC or the P-CSCF is abnormal. In the case, the first abnormality detection result indicates that the first switching network is abnormal.
  • the detecting module 1510 further detects the abnormality of the first switching network, and obtains a second abnormality detecting result, where the second abnormal detecting result is used to indicate that the first switching network recovers from the abnormality; the detecting module 1510 further Sending a second abnormality detection result to the MME.
  • the first switching network is a CS network
  • the second switching network is an IMS network
  • the device 1500 is a media gateway MGW in the CS network
  • the sending module 1520 sends an information notification request to the MME, where the information notification request includes the first Abnormal detection result.
  • FIG. 16 is a block diagram showing the structure of an apparatus 1600 for transmitting traffic according to still another embodiment of the present invention.
  • the device 1600 for transmitting traffic includes a receiving module 1610 and a transmitting module 1620.
  • the receiving module 1610 receives the notification of re-initiating the first tracking area update TAU process sent by the mobility management entity MME in the case that the first switching network is faulty or overloaded; the sending module 1620 initiates the first tracking according to the notification received by the receiving module 1610.
  • the receiving module 1610 is further configured to receive a first TAU accept message sent by the MME according to the first tracking area update process, where the first TAU accept message is used to indicate that the first switching network is unavailable or faulty, so as to be at least partially
  • the service is switched to the second switching network, the first switching network is one of the circuit switched CS network and the Internet Protocol multimedia system IMS network, and the second switching network is the other one of the CS network and the IMS network, and the service is the CS network and the IMS network. Supported business.
  • the embodiment of the present invention may be supported by the mobility management entity, when detecting that one of the IMS network and the CS network is faulty, by triggering at least part of the user equipment to re-initiate the tracking area update process, and supporting at least part of the user equipment, the IMS and the CS.
  • the service is handed over to another of the IMS network and the CS network for processing, thereby avoiding or reducing traffic loss caused by one of the IMS network and the CS network failure.
  • the receiving module 1610 is further configured to receive a notification that is sent by the MME to re-initiate the second tracking area update TAU process; the sending module 1620 is further configured to: notify the re-initiating the second tracking area to update the TAU process. Initiating a second tracking area update process; the receiving module 1610 is further configured to receive a second TAU accept message sent by the MME according to the second tracking area update process, where the second TAU accept message is used to indicate that the first switching network is available or failed or Recovery in overload to switch at least part of the traffic back to the first switching network.
  • FIG. 17 is a schematic structural diagram of an apparatus 1700 for transmitting a service according to still another embodiment of the present invention.
  • the device 1700 for transmitting traffic includes a detection module 1710 and a notification module 1720.
  • the detecting module 1710 is configured to detect whether an overload condition of the IMS network exceeds a preset threshold.
  • the notification module 1720 is configured to notify the detecting entity that the IMS network is overloaded if the detecting module 1710 detects that the overload condition of the IMS network exceeds a preset threshold, so that the detecting entity determines that the IMS network is overloaded according to the notification.
  • the embodiment of the present invention may be supported by the mobility management entity, when detecting that one of the IMS network and the CS network is faulty, by triggering at least part of the user equipment to re-initiate the tracking area update process, and supporting at least part of the user equipment, the IMS and the CS.
  • the service is handed over to another of the IMS network and the CS network for processing, thereby avoiding or reducing traffic loss caused by one of the IMS network and the CS network failure.
  • the detecting entity is a public data network gateway P-GW
  • the device 1700 is a session border controller SBC or a proxy call session control function P-CSCF entity in the IMS network.
  • the detecting entity is a home location register/home subscriber server HLR/HSS, wherein the device 1700 is a telecom voice application server in the IMS network; or, the device 1700 is an inquiry call session control function in the IMS network.
  • FIG. 18 is a block diagram showing the structure of an apparatus 1800 for transmitting services in accordance with one embodiment of the present invention.
  • the device 1800 for transmitting traffic includes a receiver 1810, a processor 1820, a memory 1830, and a communication bus 1840.
  • the receiver 1810 receives the first abnormality detection result of the first switching network, where the first abnormality detection result is used to indicate that the first switching network is abnormal.
  • the processor 1820 calls the code stored in the memory 1830 via the communication bus 1840 to trigger at least part of the user according to the first abnormality detection result received by the receiver 1810.
  • the device initiates a tracking area update process, so that at least part of the service corresponding to at least part of the user equipment is switched from the first switching network to the second switching network, where the first switching network is one of a circuit switched CS network and an Internet Protocol multimedia system IMS network.
  • the second switching network is another one of the CS network and the IMS network, and the service is a service supported by both the CS network and the IMS network.
  • the embodiment of the present invention may be supported by the mobility management entity, when detecting that one of the IMS network and the CS network is faulty, by triggering at least part of the user equipment to re-initiate the tracking area update process, and supporting at least part of the user equipment, the IMS and the CS.
  • the service is handed over to another of the IMS network and the CS network for processing, thereby avoiding or reducing traffic loss caused by one of the IMS network and the CS network failure.
  • the processor 1820 Setting the state of the first switching network to be unavailable or faulty, notifying all user equipments to re-initiate the first tracking area update TAU procedure, and after receiving the first TAU procedure re-initiated by all user equipments, sending the first to all user equipments
  • the TAU accepts a message, wherein the first TAU accept message is used to indicate that the first switching network is unavailable or faulty in order to switch at least part of the traffic to the second switching network.
  • the receiver further receives a second abnormality detection result of the first switching network, where the second abnormality detection result is used to indicate that the first switching network recovers from the fault; and the processor sets the first switching network.
  • the device is available or recovers from the fault, wherein the device 1800 further includes: a transmitter 1850, configured to notify all user equipments to initiate a second TAU procedure; after the receiver receives the second TAU procedure initiated by all user equipments, to all users The device sends a second TAU accept message, the second TAU accept message is used to indicate that the first switched network is available or recovers from the fault, in order to switch at least part of the traffic back to the first switched network.
  • the processor 1820 sets the state of the first switching network to be overloaded, and sets different user equipments to register with the first switching network and the second switching network according to a preset ratio, and notifies the part of the user equipment to re-initiate the first
  • a tracking area update TAU process after receiving the first TAU procedure re-initiated by the user equipment, the MME sends a T-AU accept message to the part of the user equipment, where the first TAU accept message is used to indicate that the first switching network is unavailable.
  • overloaded in order to switch part of the service to the second switching network, so that different user equipments use the first switching network or the second switching network to transmit services in proportion.
  • the receiver 1810 further receives a second abnormality detection result of the first switching network, where the second abnormality detection result is used to indicate that the first switching network recovers from the overload; and the processor 1820 sets the first exchange.
  • the state of the network is an overload recovery;
  • the MME sets a part of the user equipment to register with the first switching network, where the device 1800 further includes: a transmitter 1850, configured to notify a part of the user equipment to initiate a second TAU procedure, and receive a part of the user equipment in the receiving module After the initiated second TAU procedure, a second TAU accept message is sent to the part of the user equipment, and the second TAU accept message is used to indicate that the first switching network is available or recovers from the overload, so as to switch part of the service back to the first switching network.
  • the receiver 1810 receives an information notification request sent by the home location register/home subscriber server HLR/HSS, the information notification request including the first anomaly detection result.
  • the second switching network is a CS network
  • the first switching network is an IMS network
  • the receiver 1810 receives an update bearer request sent by the public data network gateway P-GW in the IMS network, where the update bearer request includes the first Abnormal detection result.
  • the second switching network is an IMS network
  • the first switching network is a CS network
  • the receiver 1810 receives an information notification request sent by the media gateway MGW in the CS network, where the information notification request includes the first abnormality detection result.
  • FIG. 19 is a block diagram showing the structure of an apparatus 1900 for transmitting a service according to another embodiment of the present invention.
  • the device 1900 for transmitting traffic includes a processor 1910, a transmitter 1920, a memory 1930, and a communication bus 1940.
  • the processor 1910 calls the code in the memory 1930 via the communication bus 1940 to detect the abnormality of the first switching network to obtain a first abnormality detecting result, wherein the first abnormal detecting result is used to indicate the first switching network abnormality.
  • the transmitter 1920 sends the detected first abnormality detection result to the mobility management entity MME, so that the MME triggers at least part of the user equipment to initiate the tracking area update process according to the first abnormality detection result, so that at least part of the at least part of the user equipment corresponds to at least part of the user equipment.
  • the service is switched from the first switching network to the second switching network, where the first switching network is one of a circuit switched CS network and an internet protocol multimedia system IMS network, and the second switching network is another one of the CS network and the IMS network, and the service is Services supported by both the CS network and the IMS network.
  • the embodiment of the present invention may be supported by the mobility management entity, when detecting that one of the IMS network and the CS network is faulty, by triggering at least part of the user equipment to re-initiate the tracking area update process, and supporting at least part of the user equipment, the IMS and the CS.
  • the service is handed over to another of the IMS network and the CS network for processing, thereby avoiding or reducing traffic loss caused by one of the IMS network and the CS network failure.
  • the device 1900 is a home location register/home subscriber server HLR/HSS, and the sender 1920 sends an information notification request to the MME, the information notification request including the first abnormality detection result.
  • the processor 1910 in the case of determining that the first switching network is faulty, routes the at least part of the user equipment to the called user's call to the second switching network.
  • the processor 1910 further determines whether at least part of the user equipment that is the called user is registered according to the first switching network, and determines that at least part of the user equipment is registered according to the second switching network or is not in accordance with the first In the case of a switched network registration, a call from at least a portion of the user equipment as the called subscriber is routed to the second switching network.
  • the processor 1910 further determines at least part of the called user. Whether the user equipment is registered according to the first switching network, and in determining that at least part of the user equipment is registered according to the first switching network or not registered according to the second network, routing the at least part of the user equipment as the called user to the first exchange The internet.
  • the first switching network is an IMS network
  • the second switching network is a CS network
  • the device 1900 is a public data network gateway P-GW in the IMS network
  • the transmitter 1920 sends the MME to the MME through the serving gateway S-GW.
  • Updating the bearer request, the update bearer request includes the first abnormality detection result
  • the processor 1910 detects whether the session border controller SBC or the proxy call session control function P-CSCF entity in the IMS network is abnormal, wherein the SBC or the P-CSCF entity is abnormal.
  • the first abnormality detection result indicates that the first switching network is abnormal.
  • the processor 1910 further detects an abnormality of the first switching network, and obtains a second abnormality detecting result, where the second abnormal detecting result is used to indicate that the first switching network recovers from the abnormality; the transmitter 1920 further Sending a second abnormality detection result to the MME.
  • the first switching network is a CS network
  • the second switching network is an IMS network
  • the device 1900 is a media gateway MGW in the CS network
  • the sender 1920 sends an information notification request to the MME, where the information notification request includes the first Abnormal detection result.
  • Figure 20 is a block diagram showing the structure of an apparatus 2000 for transmitting services according to still another embodiment of the present invention.
  • the device 2000 for transmitting services includes a receiver 2010, a transmitter 2050, a processor 2010, and a communication bus 2040.
  • the processor 2010 is for controlling the receiver 2010 and the transmitter 2120 via a communication bus.
  • the memory 2130 is for storing code.
  • the receiver 2010 receives the notification of re-initiating the first tracking area update TAU process sent by the mobility management entity MME in case the first switching network is faulty or overloaded; the transmitter 2020 initiates the first tracking according to the notification received by the receiver 2010. a region update process; the receiver 2010 is further configured to receive a first TAU accept message sent by the MME according to the first tracking area update process, The first TAU accept message is used to indicate that the first switching network is unavailable or faulty, so as to switch at least part of the service to the second switching network, where the first switching network is one of a circuit switched CS network and an Internet Protocol multimedia system IMS network.
  • the second switching network is another one of the CS network and the IMS network, and the service is a service supported by both the CS network and the IMS network.
  • the embodiment of the present invention may be supported by the mobility management entity, when detecting that one of the IMS network and the CS network is faulty, by triggering at least part of the user equipment to re-initiate the tracking area update process, and supporting at least part of the user equipment, the IMS and the CS.
  • the service is handed over to another of the IMS network and the CS network for processing, thereby avoiding or reducing traffic loss caused by one of the IMS network and the CS network failure.
  • the mobility management entity when detecting that one of the IMS network and the CS network is faulty, may switch at least part of the services supported by the IMS and the CS to the IMS by triggering at least part of the user equipment to re-initiate the tracking area update process.
  • the other of the network and the CS network processes to avoid or reduce the loss of traffic in the event of a failure of one of the IMS network and the CS network.
  • the receiver 2010 is further configured to receive, by the MME, a notification that the second tracking area update TAU process is re-initiated; the transmitter 2020 is further configured to: notify, according to the re-initiation of the second tracking area, the TAU process. Initiating a second tracking area update process; the receiver 2010 is further configured to receive a second TAU accept message sent by the MME according to the second tracking area update process, where the second TAU accept message is used to indicate that the first switching network is available or faulty or Recovery in overload to switch at least part of the traffic back to the first switching network.
  • Figure 21 is a block diagram showing the structure of an apparatus 2100 for transmitting services according to still another embodiment of the present invention.
  • the device 2100 for transmitting traffic includes a processor 2110, a transmitter 2120, a memory 2130, and a communication bus 2140.
  • the processor 2110 is configured to call, by using the communication bus 2140, the code stored in the memory to detect Whether the overload condition of the IMS network exceeds a preset threshold.
  • the transmitter 2120 is configured to notify the detecting entity that the IMS network is overloaded if the processor 2110 detects that the overload condition of the IMS network exceeds a preset threshold, so that the detecting entity determines that the IMS network is overloaded according to the notification.
  • the embodiment of the present invention may be supported by the mobility management entity, when detecting that one of the IMS network and the CS network is faulty, by triggering at least part of the user equipment to re-initiate the tracking area update process, and supporting at least part of the user equipment, the IMS and the CS.
  • the service is handed over to another of the IMS network and the CS network for processing, thereby avoiding or reducing traffic loss caused by one of the IMS network and the CS network failure.
  • the detecting entity is a public data network gateway P-GW
  • the device 2100 is a session border controller SBC or a proxy call session control function P-CSCF entity in the IMS network.
  • the detecting entity is a home location register/home subscriber server HLR/HSS, wherein the device 2100 is a telecom voice application server in the IMS network; or, the device 2100 is an inquiry call session control function in the IMS network.
  • the embodiment of the present invention further provides a communication system that can include: the device 1400 of FIG. 14, the device 1500 of FIG. 15, the device 1600 of FIG. 16, and the device 1700 of FIG.
  • the embodiment of the present invention further provides a communication system which may include: the device 1800 of FIG. 18, the device 1900 of FIG. 19, the device 2000 of FIG. 20, and the device 2100 of FIG.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • the units described as separate components may or may not be physically separate, and the components displayed as the units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like.
  • the media of the sequence code includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Les modes de réalisation de la présente invention concernent un procédé et un dispositif de transmission de services. Selon le procédé : une entité de gestion de mobilité (MME) reçoit un premier résultat de détection d'anomalie d'un premier réseau de commutation, ledit résultat indiquant une anomalie dans le premier réseau de commutation; et, en fonction du premier résultat de détection d'anomalie, l'unité de gestion de mobilité déclenche au moins une partie des équipements utilisateur pour initier un processus de mise à jour de zone de localisation, de sorte à permettre à au moins une partie des services correspondant à au moins une partie des équipements utilisateur d'être commutés du premier réseau de commutation à un deuxième réseau de commutation, le premier réseau de commutation étant un réseau de commutation de circuits ou un réseau de sous-système multimédia de protocole Internet (IMS), et le deuxième réseau de commutation est le réseau restant, et les services étant ceux supportés par les deux réseaux de commutation de circuits et d'IMS. Les modes de réalisation de l'invention permettent d'éviter ou de réduire les pertes de services causées par une défaillance du réseau d'IMS ou du réseau de commutation de circuits.
PCT/CN2013/084748 2013-02-22 2013-09-30 Procédé et dispositif de transmission de services WO2014127637A1 (fr)

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