WO2012034468A1 - 重启移动性管理单元的处理方法及移动性管理单元 - Google Patents

重启移动性管理单元的处理方法及移动性管理单元 Download PDF

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Publication number
WO2012034468A1
WO2012034468A1 PCT/CN2011/078426 CN2011078426W WO2012034468A1 WO 2012034468 A1 WO2012034468 A1 WO 2012034468A1 CN 2011078426 W CN2011078426 W CN 2011078426W WO 2012034468 A1 WO2012034468 A1 WO 2012034468A1
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WIPO (PCT)
Prior art keywords
management unit
mobility management
user equipment
bearer
message
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PCT/CN2011/078426
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English (en)
French (fr)
Inventor
卢飞
朱进国
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中兴通讯股份有限公司
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Publication of WO2012034468A1 publication Critical patent/WO2012034468A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/30Network data restoration; Network data reliability; Network data fault tolerance
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W68/00User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Definitions

  • the present invention relates to the field of communications, and in particular to a processing method and a mobility management unit for restarting a mobility management unit.
  • WiMAx Worldwide Interoperability for Microwave Access
  • the third generation mobile communication system must maintain its strong competitiveness in the field of mobile communications, and must improve its network performance and reduce Network construction and operating costs. Therefore, the 3rd Generation Partnership Project (3GPP) standardization working group is currently working on the Packet Switch Core (PS Core) and the global mobile communication system wireless access.
  • 3GPP 3rd Generation Partnership Project
  • Evolved Packet Core Provides higher transmission rates, shorter transmission delays, optimized packetization, and Evolved Universal Terrestrial Radio Access Network (E-UTRAN), Wireless Local Area (European Local Area Network) Network, referred to as WLAN) and mobility management between other non-3GPP access networks.
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • WLAN Wireless Local Area Network
  • the architecture of the current SAE is shown in Figure 1. It includes the following network elements: Evolved RAN (E-RAN): It can provide higher uplink/downlink rate and lower transmission delay. More reliable wireless transmission.
  • the network element included in the E-RAN is an Evolved NodeB (eNodeB), which is used to provide radio resources for access of user equipment.
  • Packet Data Network PDN: A network that provides services for user equipment.
  • the E-Packet Core provides lower latency and allows more wireless access systems to access. It includes the following network elements: Mobility Management Entity (MME): A control plane function entity, a server that temporarily stores user equipment data, and is responsible for managing and storing the context of User Equipment (UE). For example, the UE/user equipment identifier, the mobility management status, the user equipment security parameter, etc., allocate a temporary identifier to the user equipment, and when the UE camps on the tracking area or the network, it is responsible for setting the user Performing authentication; processing all non-access stratum messages between the MME and the UE; triggering paging at the SAE.
  • the mobility management unit is the MME.
  • the mobility management unit is a serving general packet radio service support node (Serving Gateway, SGW for short) is a user plane entity responsible for user plane data routing. Processing, terminating the downlink data of the UE in the idle (ECM_IDLE) state, managing and storing the SAE bearer context of the UE, such as IP bearer service parameters and network internal routing information, etc.
  • the SGW is an anchor point of the internal user plane of the 3GPP system.
  • a user equipment can only have one SGW at a time.
  • a packet data network gateway (PDN Gateway, PGW for short), a gateway responsible for UE access to the PDN, assigning user equipment IP addresses, and being a mobile of 3GPP and non-3GPP access systems.
  • the PGW function also includes policy enforcement and charging support.
  • the user equipment can access multiple PGWs at the same time.
  • the Policy and Charging Enforcement Function (PCEF) is also located in the PGW.
  • Policy and Charging Rules Function (referred to as Policy and Charging Rules Function)
  • the PCRF is responsible for providing policy control and charging rules to the PCEF.
  • the Home Subscriber Server (HSS) permanently stores the user equipment subscription data.
  • the content stored in the HSS includes the UE's International Mobile Subscriber Identity (International Mobie Subscriber Identity).
  • the IP address of the PGW is referred to as IMSI. Physically, the SGW and the PGW may be unified.
  • the EPC system user plane network element includes the SGW and the PGW.
  • the SGW has the function of buffering the downlink data of the UE in the idle state.
  • the SGW cannot send the downlink data in time because the SGW does not know the address of the serving eNodeB. Therefore, the SGW needs to receive the downlink data.
  • the downlink data is buffered, and the downlink data arrival notification message (Downlink Data Notification) needs to be sent to the MME, and the MME triggers paging (Paging). If the MME receives the paging response within a certain time, the Serving GW can obtain the eNodeB in time. The address can be used to send cached data to the eNodeB.
  • the SGW can only discard the arriving downlink data packet and cannot send the downlink data arrival notification message to the MME.
  • the coverage area where the UE is located changes, for example, from one mobility management unit coverage area to another mobility management unit coverage area, the UE discovers that it has entered an unregistered area by listening to the broadcast channel, in order to ensure the UE and If the services between the core networks are contiguous, registration is required under the new RAT coverage area. Therefore, the UE initiates Tracking Area Update (TAU) or routing area update (Routing). Area Update, referred to as RAU) process.
  • TAU Tracking Area Update
  • RAU routing area update
  • Step S301 The UE moves to an E-UTRAN coverage area of another MME, and sends a tracking area update request to the new MME, requesting registration in a new area, and the request message carries the old MME.
  • the GUTIo allocated to the UE in step S302 the new MME finds the old MME according to the GUTI identity, and sends a context request signaling to perform a context acquisition process.
  • Step S303 The old MME sends the mobility management and bearer information of the user equipment to the new MME, BP, to perform a context response.
  • Step S304 the new MME confirms the context after receiving the corresponding information, SP, and confirms the context.
  • Step S305 The new MME initiates an update bearer request to the SGW, where the request message carries the source GTP-C tunnel identifier and the destination GTP-C tunnel identifier, and the SGW updates the binding relationship of the bearer.
  • Step S306 The SGW sends an update bearer request to the PGW, and sends parameters such as address information, tunnel identifier information, and access technology type of the SGW to the PGW.
  • Step S307 the PGW updates its own context and returns update bearer response information to the SGW, where the information content includes the address of the PGW, the tunnel identifier, and the like.
  • Step S308 the SGW returns an update bearer response to the new MME, and brings the destination GTP-C tunnel identifier specified by the SGW, its own address, and the address and tunnel information of the PGW to the MME.
  • Step S309 the new MME notifies the change of the HSS registration location by the location update message.
  • Step S310 the HSS sends location cancellation signaling to the old MME, and only maintains the registration of the new MME.
  • the old MME returns a location cancellation response to the HSS.
  • Step S312 the HSS confirms the location update of the new MME.
  • Step S313 If the new MME confirms that the UE is valid in the current tracking area, it sends a tracking area update accept message to the UE, where the message carries a periodic tracking area update timer, and the recommended value in the current standard protocol is 54 minutes.
  • Step S314 if the new MME allocates a new GUTI identifier to the UE through the TAU procedure, then
  • the UE will return a tracking area update complete message to confirm to the MME.
  • the MME may restart due to system instability or upgrade. After the mobility management unit is restarted, the mobility management unit will not be able to contact the user equipment, so that the user equipment cannot obtain downlink data. On the other hand, when the user has uplink data to be sent, the user will actively contact the network and may enter. In another mobility management unit, if the mobility management unit to be restored also performs IMSI paging on the user, the user will enter the detached state again, causing the user service to be interrupted, thereby causing the user experience to be poor.
  • a main object of the present invention is to provide a processing method and a mobility management unit for restarting a mobility management unit to solve the above problem. problem.
  • a processing method of restarting a mobility management unit is provided.
  • the processing method of the restart mobility management unit includes: after the mobility management unit restarts, the mobility management unit receives a downlink data arrival notification message from the service gateway; the mobility management unit determines the home subscriber server to which the user equipment belongs The mobility management unit is allowed to page the user equipment; the mobility management unit pages the user equipment using the international mobile user equipment identifier of the user equipment. The mobility management unit determines that the home subscriber server to which the user equipment belongs allows the mobility management unit to page the user equipment.
  • the mobility management unit sends a location update request message to the home subscriber server, where the location update request message carries a request for the user
  • the fault recovery indication information that the device performs paging the home subscriber server determines whether the mobility management unit is consistent with the mobility management unit saved by itself; if the determination result is yes, the home subscriber server sends a location update permission message to the mobility management unit; The mobility management unit determines that the home subscriber server allows the mobility management unit to page the user equipment according to the location update permission message. If the determination result is no, the home subscriber server sends a location update reject message to the mobility management unit, and carries the reason value rejecting the mobility management unit in the location update reject message.
  • the method further includes: the mobility management unit sends a downlink data failure indication message to the service gateway, where the downlink data failure indication message is used to indicate that the service gateway deletes the service gateway and The bearer between the packet data network gateways.
  • the method further includes: the serving gateway detects that the mobility management unit restarts or the link is abnormal; the serving gateway reserves the bearer between the serving gateway and the packet data network gateway, where The bearer is determined by the mobility management unit or the policy and charging rule function entity in the bearer establishment process; the serving gateway receives the downlink data on the bearer.
  • the downlink data arrival notification message also carries user location information; the mobility management unit uses the international mobile user equipment identity code and the user location information for paging. After the mobility management unit determines that the home subscriber server to which the user equipment belongs allows the mobility management unit to page the user equipment, the method further includes: the mobility management unit receives the user location information from the home subscriber server; the mobility management unit Paging is performed using the International Mobile User Equipment Identity and User Location Information.
  • the mobility management unit includes one of the following: MME, SGSN.
  • the mobility management unit comprises: a receiving module configured to receive a downlink data arrival notification message from the serving gateway; and a determining module configured to determine that the home subscriber server to which the user equipment belongs allows the mobility management unit to page the user equipment
  • the paging module is configured to page the user equipment using the international mobile user equipment identifier of the user equipment.
  • the determining module includes: a sending submodule, configured to send a location update request message to the home subscriber server, where the location update request message carries fault recovery indication information for requesting paging of the user equipment;
  • the home subscriber server includes: a determining module, setting To determine whether the mobility management unit is consistent with the mobility management unit saved by itself;
  • the sending module is configured to send a location update permission message to the mobility management unit if the determination result is yes;
  • the determining module further includes: determining the submodule, It is set to determine that the home subscriber server allows the mobility management unit to page the user equipment according to the location update permission message.
  • the mobility management unit obtains the permission through the home subscriber server, and then pages the user equipment through the international mobile user equipment identifier, so that the user equipment can be reconnected to the mobility management unit, and the mobility management is solved. After the unit is restarted, the user equipment cannot be contacted, and the user equipment is guaranteed to obtain downlink data, thereby improving the user experience.
  • FIG. 1 is a schematic diagram of a structure of an evolved packet network system according to the related art
  • FIG. 2 is an interaction flowchart of a network initiated service request according to the related art
  • FIG. 3 is an interaction flow of a normal tracking area update according to the related art.
  • Figure 4 is a flowchart of a processing method for restarting the mobility management unit according to an embodiment of the present invention
  • Figure 5 is an interaction flow chart according to a preferred embodiment of the present invention
  • Figure 6 is an interaction according to a preferred embodiment 2 of the present invention
  • Figure 7 is an interaction flow chart according to a preferred embodiment 3 of the present invention
  • Figure 8 is an interaction flow chart according to a preferred embodiment 4 of the present invention
  • Figure 9 is an interaction flow chart according to a preferred embodiment 5 of the present invention
  • FIG. 1 is a schematic diagram of a structure of an evolved packet network system according to the related art
  • FIG. 2 is an interaction flowchart of a network initiated service request according to the related art
  • FIG. 3 is an interaction flow of
  • FIG. 11 is an interaction flowchart according to a preferred embodiment 7 of the present invention
  • FIG. 12 is an interaction flowchart according to a preferred embodiment 8 of the present invention
  • FIG. 13 is an implementation according to the present invention
  • a block diagram of a mobility management unit of an example
  • FIG. 14 is a block diagram showing the structure of a mobility management unit in accordance with a preferred embodiment of the present invention.
  • Step S402 after the mobility management unit is restarted, the mobility management unit receives a downlink data arrival notification message from the serving gateway, where the downlink data arrival notification message is used to indicate that the serving gateway receives the downlink data from the packet data network gateway, where The downlink data is data that the packet data network gateway sends to the user equipment through the service gateway.
  • Step S404 the mobility management unit determines that the home subscriber server to which the user equipment belongs allows the mobility management unit to page the user equipment.
  • Step S406 The mobility management unit uses the international mobile user equipment identifier of the user equipment carried in the downlink data arrival notification message to page the user equipment.
  • the mobility management unit obtains the permission by the home subscriber server, and then pages the user equipment by using the international mobile user equipment identifier, so that the user equipment can be reconnected to the mobility management unit, and the The user equipment obtains the downlink data, thereby improving the user experience.
  • the international mobile user equipment identifier of the user equipment may be carried in a downlink data arrival notification message, or may be sent by the home subscriber server to the mobility management unit in advance, or may be a mobility management unit.
  • the method is not limited by the present invention.
  • the mobility management unit determines that the home subscriber server to which the user equipment belongs to allow the mobility management unit to page the user equipment comprises: the mobility management unit sends a location update request message to the home subscriber server, where the location update request message is carried Requesting failure recovery indication information for paging the user equipment; the home subscriber server determines whether the mobility management unit is consistent with the mobility management unit saved by itself; if the determination result is yes, the home subscriber server sends the location update to the mobility management unit The message is allowed; the mobility management unit determines that the home subscriber server allows the mobility management unit to page the user equipment according to the location update permission message.
  • the mobility management unit if the mobility management unit is consistent with the mobility management unit saved by the home subscriber server, the user equipment is paged by the mobility management unit, and the implementation manner is simple and reliable.
  • the home subscriber server sends a location update reject message to the mobility management unit, and carries the reason value of the reject mobility management unit in the location update reject message.
  • the cause value may be that the user equipment has been registered in another mobility management unit.
  • the mobility management unit sends a downlink data failure indication message to the serving gateway, where the downlink data failure indication message is used to instruct the serving gateway to delete the serving gateway and the packet data.
  • deleting the bearer between the serving gateway and the packet data network gateway can save network resources.
  • the serving gateway detects that the mobility management unit restarts or the link is abnormal; the serving gateway reserves the bearer between the serving gateway and the packet data network gateway, where the bearer It is determined by the mobility management unit or the policy and charging rule function entity in the bearer establishment process; the serving gateway receives the downlink data on the bearer.
  • the serving gateway if the serving gateway detects that the mobility management unit is restarted, the serving gateway locally deletes all relevant bearer information and user equipment information with the packet data network gateway.
  • a part of the bearer is reserved between the serving gateway and the packet data network gateway, and then the serving gateway receives the downlink data on the part of the bearer, so that the user equipment can obtain the downlink data, thereby improving the user experience.
  • the downlink data arrival notification message further carries user location information; the mobility management unit uses the international mobile user equipment identity code and the user location information to perform paging.
  • the paging range of the mobility management unit can be narrowed by paging using the international mobile user equipment identification code and the user location information in combination.
  • the user location information carried by the downlink data arrival notification message is notified by the user equipment to the serving gateway by the mobility management unit during the mobility management process.
  • the mobility management unit receives user location information and/or user subscription information from the home subscriber server;
  • the mobility management unit uses the international mobile user equipment identifier and user location information for paging.
  • the paging range of the mobility management unit can be narrowed by paging using the international mobile user equipment identification code and the user location information in combination.
  • the user can avoid reinserting the user subscription data when attaching to the mobility management unit next time, thereby saving network signaling.
  • the mobility management unit comprises one of the following: MME, SGSN.
  • FIG. 5 is an interaction flowchart according to a preferred embodiment of the present invention. As shown in FIG. 5, the following steps S501 to S520 are included. Step S501, the UE is attached to the network. Step S502: The PGW sends a bearer setup request message to the SGW, where the message carries a QoS (Quality of Service), a TFT, a PGW user plane address, a TEID, and a charging identifier.
  • QoS Quality of Service
  • Step S503 The SGW sends a bearer setup request message to the MME, where the message carries the bearer QoS, the user plane address of the TFT, the SGW, the TEID, and the charging identifier.
  • Step S504 The MME allocates a bearer identifier to the bearer, and establishes a session management request, where the session management request includes a bearer QoS, a bearer identifier, and a bearer TFT.
  • the MME sends a bearer setup request message to the eNodeB, where the message carries the session management request, the bearer QoS, the bearer identifier, the user plane address and the TEID of the SGW.
  • Step S505 The eNodeB sends an RRC connection reconfiguration message to the UE, where the message carries a radio bearer QoS, a session management request, and a radio bearer identifier.
  • Step S506 the UE sends an RRC Connection Reconfiguration Complete message to the eNodeB.
  • Step S507 The eNodeB sends a bearer setup response message to the MME, and carries the user plane address and the TEID of the eNodeB.
  • Step S508 the UE non-access stratum establishes a session establishment response, and delivers the message to the eNodeB through a direct transmission message.
  • Step S509 The eNodeB delivers the session establishment response to the MME by using an uplink direct transmission message.
  • the MME replies to the SGW with a bearer setup response message, where the message includes the bearer identifier, the user plane address and the TEID of the eNodeB, and the bearer reservation indication is required to indicate whether the SGW retains the bearer when detecting that the MME restarts.
  • the SGW replies to the PGW with a bearer setup response message, where the message includes a bearer identifier, a user plane address and a TEID of the SGW.
  • the MME restarts.
  • Step S513 the SGW detects that the MME restarts, and the SGW deletes the bearer according to the bearer retention policy and retains part of the bearer.
  • the MME recovers.
  • Step S515 the SGW receives the downlink data on the reserved bearer, and the SGW sends a downlink data arrival notification message to the MME, where the message carries the user IMSI.
  • Step S516 the MME sends a location update request message to the HSS, where the message carries a fault recovery indication, and in step S517, when the MME stored by the HSS and the MME to be recovered are in effect, the HSS inserts the user equipment data into the MME.
  • Step S519 the eNodeB sends a paging message to the UE, where the paging message carries the IMSI.
  • Step S520 after the UE receives the IMSI paging, the UE reattaches to the network.
  • the mobility management unit is used as an example of the MME.
  • the SGSN the processing method is similar, and therefore will not be described in detail.
  • the preferred embodiment 2 describes the PCRF delivering a bearer retention policy.
  • FIG. 6 is an interaction flowchart according to a preferred embodiment of the present invention.
  • the method includes the following steps S601 to S620.
  • Step S601 the UE is attached to the network.
  • Step S602 the PCRF sends a PCC policy to the PGW.
  • Step S603 The PGW sends a bearer setup request message to the SGW, where the bearer carries the QoS, the bearer TFT, the user plane address and the TEID of the PGW, and the charging identifier, and needs to carry a bearer reservation indication, which is used to indicate whether the SGW is detecting the MME. Keep the bearer on reboot.
  • Step S604 The SGW sends a bearer setup request message to the MME, where the message carries the bearer QoS, the user plane address of the TFT, the SGW, the TEID, and the charging identifier.
  • Step S605 The MME allocates a bearer identifier to the bearer, and establishes a session management request, where the session management request includes a bearer QoS, a bearer identifier, and a bearer TFT.
  • the MME sends a bearer setup request message to the eNodeB, where the message carries the session management request, the bearer QoS, the bearer identifier, the user plane address and the TEID of the SGW.
  • Step S606 The eNodeB sends an RRC connection reconfiguration message to the UE, where the message carries a radio bearer QoS, a session management request, and a radio bearer identifier.
  • Step S607 the UE sends an RRC Connection Reconfiguration Complete message to the eNodeB.
  • Step S608 The eNodeB sends a bearer setup response message to the MME, and carries the user plane address and the TEID of the eNodeB.
  • Step S609 the UE non-access stratum establishes a session establishment response, and delivers the message to the eNodeB through a direct transmission message.
  • Step S610 the eNodeB delivers the session establishment response to the MME by using an uplink direct transmission message.
  • the MME replies to the SGW with a bearer setup response message, where the message includes the bearer identifier, the user plane address and the TEID of the eNodeB, and the bearer reservation indication is required to indicate whether the SGW retains the bearer when detecting that the MME restarts.
  • the SGW replies to the PGW with a bearer setup response message, where the message includes a bearer identifier, a user plane address and a TEID of the SGW.
  • the PGW sends the IP session modification to the PCRF successfully.
  • Step S614 after the MME restarts, the SGW detects that the MME restarts, and the SGW deletes the bearer according to the bearer reservation policy and retains part of the bearer.
  • Step S615 the SGW receives the downlink data on the reserved bearer, and the SGW sends a downlink data arrival notification message to the MME, where the message carries the user IMSI.
  • Step S616 the MME sends a location update request message to the HSS, where the message carries a fault recovery indication.
  • Step S617 When the MME stored by the HSS and the MME to be failed to recover, the HSS inserts the user equipment data into the MME.
  • Step S619 the eNodeB sends a paging message to the UE, where the paging message carries the IMSI.
  • Step S620 after the UE receives the IMSI paging, the UE reattaches to the network.
  • the mobility management unit is used as an example for the MME.
  • the SGSN the processing method is similar, and therefore will not be described in detail.
  • the preferred embodiment 3 describes that the bearer reservation policy is determined by the mobility management unit.
  • FIG. 7 is an interaction flowchart according to a preferred embodiment 3 of the present invention. As shown in FIG. 7, the following steps S701 to S720 are included. Step S701, the UE is attached to the network. Step S702: The PGW sends a bearer setup request message to the SGW, where the bearer carries the bearer QoS, and the bearer carries the bearer QoS.
  • Step S703 The SGW sends a bearer setup request message to the MME, where the message carries the bearer QoS, the bearer plane, the user plane address of the SGW, the TEID, and the charging identifier.
  • Step S704 The MME allocates a bearer identifier to the bearer, and establishes a session management request, where the session management request includes a bearer QoS, a bearer identifier, and a bearer TFT.
  • the MME sends a bearer setup request message to the eNodeB, where the message carries the session management request, the bearer QoS, the bearer identifier, the user plane address and the TEID of the SGW.
  • Step S705 The eNodeB sends an RRC connection reconfiguration message to the UE, where the message carries a radio bearer QoS, a session management request, and a radio bearer identifier.
  • the UE sends an RRC Connection Reconfiguration Complete message to the eNodeB.
  • Step S707 The eNodeB sends a bearer setup response message to the MME, and carries the user plane address and the TEID of the eNodeB.
  • Step S708 the UE non-access stratum establishes a session establishment response, and delivers the message to the eNodeB through a direct transmission message.
  • Step S709 the eNodeB delivers the session establishment response to the MME by using an uplink direct transmission message.
  • the MME replies to the SGW with a bearer setup response message, where the message includes the bearer identifier, the user plane address and the TEID of the eNodeB, and the bearer reservation indication is required to indicate whether the SGW retains the bearer when detecting that the MME restarts.
  • Step S711 The SGW replies to the PGW with a bearer setup response message, where the message includes a bearer identifier, a user plane address and a TEID of the SGW.
  • the MME restarts.
  • Step S713 the SGW detects that the MME restarts, and the SGW deletes the bearer according to the bearer retention policy and retains part of the bearer.
  • Step S714, the MME recovers.
  • Step S715 The SGW receives downlink data on the reserved bearer, and the SGW sends a downlink data arrival notification message to the MME, where the message carries the user IMSI.
  • Step S716 The MME sends a location update request message to the HSS, where the message carries a fault recovery indication.
  • step S717 when the MME stored by the HSS is inconsistent with the MME to be recovered, the HSS rejects the location update process and carries the corresponding cause value. For the cause value, the MME can know that the UE has already registered in another MME.
  • Step S719 the SGW sends a release session request message to the PGW, and is used to release the bearer between the SGW and the PGW.
  • Step S720 the PGW replies to the SGW with a release session response message.
  • the mobility management unit is used as an example of the MME.
  • the SGSN the processing method is similar, and therefore will not be described in detail.
  • Preferred embodiment four The preferred embodiment 4 describes that the PCRF delivers a bearer reservation policy.
  • the difference between the preferred embodiment 4 and the preferred embodiment 2 is that the MME stored by the HSS is inconsistent with the MME to be recovered, and the HSS rejects the location update process.
  • FIG. 8 is an interaction flowchart according to a preferred embodiment 4 of the present invention. As shown in FIG. 8, the following steps S801 to S820 are included. Step S801, the UE is attached to the network. Step S802, the PCRF sends a PCC policy to the PGW.
  • Step S803 The PGW sends a bearer setup request message to the SGW, where the bearer carries the QoS, the bearer TFT, the user plane address and the TEID of the PGW, and the charging identifier, and needs to carry a bearer reservation indication, which is used to indicate whether the SGW is detecting the MME. Keep the bearer on reboot.
  • Step S804 The SGW sends a bearer setup request message to the MME, where the message carries the bearer QoS, the bearer plane, the user plane address of the SGW, the TEID, and the charging identifier.
  • Step S805 The MME allocates a bearer identifier to the bearer, and establishes a session management request, where the session management request includes a bearer QoS, a bearer identifier, and a bearer TFT.
  • the MME sends a bearer setup request message to the eNodeB, where the message carries the session management request, the bearer QoS, the bearer identifier, the user plane address and the TEID of the SGW.
  • Step S806 the eNodeB sends an RRC connection reconfiguration message to the UE, where the message carries the radio bearer.
  • Step S807 the UE sends an RRC Connection Reconfiguration Complete message to the eNodeB.
  • Step S809 the UE non-access stratum establishes a session establishment response, and delivers the message to the eNodeB through a direct transmission message.
  • Step S810 the eNodeB delivers the session establishment response to the MME by using an uplink direct transmission message.
  • the MME sends a bearer setup response message to the SGW, where the message includes the bearer identifier, the user plane address and the TEID of the eNodeB, and the bearer reservation indication is required to indicate whether the SGW retains the bearer when detecting the MME restart.
  • the SGW replies to the PGW with a bearer setup response message, where the message includes a bearer identifier, a user plane address and a TEID of the SGW.
  • the PGW sends the IP session modification to the PCRF successfully.
  • Step S814 after the MME restarts, the SGW detects that the MME restarts, and the SGW deletes the bearer according to the bearer retention policy and retains part of the bearer.
  • Step S815 the SGW receives the downlink data on the reserved bearer, and the SGW sends a downlink data arrival notification message to the MME, where the message carries the user IMSI.
  • Step S816 the MME sends a location update request message to the HSS, where the message carries a fault recovery indication.
  • step S817 when the MME stored by the HSS is inconsistent with the MME to be recovered, the HSS rejects the location update process and carries the corresponding cause value.
  • the MME can learn that the UE has been registered in another MME.
  • Step S818, the MME sends a downlink data failure indication message to the SGW, and the SGW releases the cached data.
  • the mobility management unit is used as an example.
  • the SGSN the processing method is similar, and therefore will not be described in detail.
  • the preferred embodiment 5 describes that the bearer reservation policy is determined by the mobility management unit.
  • FIG. 9 is a flow chart of interaction according to a preferred embodiment 5 of the present invention. As shown in FIG. 9, the following steps S901 to S920 are included. In step S901, the UE is attached to the network. Step S902: The PGW sends a bearer setup request message to the SGW, where the bearer carries the QoS, the bearer TFT, the user plane address and the TEID of the PGW, and the charging identifier.
  • Step S903 The SGW sends a bearer setup request message to the MME, where the message carries the bearer QoS, the bearer TFT, the user plane address of the SGW, the TEID, and the charging identifier.
  • Step S904 the MME allocates a bearer identifier to the bearer, and establishes a session management request, where the session management request includes a bearer QoS, a bearer identifier, and a bearer TFT.
  • the MME sends a bearer setup request message to the eNodeB, where the message carries the session management request, the bearer QoS, the bearer identifier, the user plane address and the TEID of the SGW.
  • Step S905 The eNodeB sends an RRC connection reconfiguration message to the UE, where the message carries a radio bearer QoS, a session management request, and a radio bearer identifier.
  • Step S906 the UE sends an RRC Connection Reconfiguration Complete message to the eNodeB.
  • Step S907 The eNodeB sends a bearer setup response message to the MME, and carries the user plane address and the TEID of the eNodeB.
  • Step S908 the UE non-access stratum establishes a session establishment response, and delivers the message to the eNodeB through a direct transmission message.
  • Step S909 the eNodeB delivers the session establishment response to the MME by using an uplink direct transmission message.
  • Step S911 the SGW replies to the PGW with a bearer setup response message, where the message includes a bearer identifier, a user plane address and a TEID of the SGW.
  • Step S912 The UE performs a location update process, and the MME sends the location information of the UE to the SGW by using a location update notification message.
  • the location message can be a TAI list.
  • Step S913 the SGW returns a location update notification response message to the MME.
  • Step S914 the SGW detects that the MME restarts, and the SGW deletes the bearer according to the bearer reservation policy and retains part of the bearer.
  • Step S915 The SGW receives downlink data on the reserved bearer, and the SGW sends a downlink data arrival notification message to the MME, where the message carries the user IMSI and the stored user location information.
  • step S916 the MME sends a location update request message to the HSS, and the message carries a fault recovery indication.
  • step S917 when the MME stored by the HSS and the MME to be recovered are in effect, the HSS inserts the user equipment data into the MME.
  • step S918 the MME sends a paging message to all eNodeBs in the user location information acquired in step S915, where the paging message carries the IMSI.
  • step S919 the eNodeB sends a paging message to the UE, where the paging message carries the IMSI.
  • Step S920 after the UE receives the IMSI paging, the UE reattaches to the network.
  • the mobility management unit is used as an example for the MME.
  • the SGSN the processing method is similar, and therefore will not be described in detail.
  • the preferred embodiment 6 describes the PCR bearer delivery bearer retention policy.
  • the SGW carries the user IMSI and the user location information in the downlink data arrival notification message.
  • FIG. 10 is a flow chart of interaction according to a preferred embodiment of the present invention. As shown in FIG. 10, the following steps are included.
  • Step S1001 The UE is attached to the network.
  • the PCRF sends a PCC policy to the PGW.
  • Step S1004 The SGW sends a bearer setup request message to the MME, where the message carries the bearer QoS, the bearer plane, the user plane address of the SGW, the TEID, and the charging identifier.
  • Step S1005 The MME allocates a bearer identifier to the bearer, and establishes a session management request, where the session management request includes a bearer QoS, a bearer identifier, and a bearer TFT.
  • the MME sends a bearer setup request message to the eNodeB, where the message carries the session management request, the bearer QoS, the bearer identifier, the user plane address and the TEID of the SGW.
  • Step S1006 The eNodeB sends an RRC connection reconfiguration message to the UE, where the message carries a radio bearer QoS, a session management request, and a radio bearer identifier.
  • Step S1007 The UE sends an RRC Connection Reconfiguration Complete message to the eNodeB.
  • Step S1008 The eNodeB sends a bearer setup response message to the MME, and carries the user plane address and the TEID of the eNodeB.
  • Step S1009 The UE non-access stratum establishes a session establishment response, and delivers the message to the eNodeB through a direct transmission message.
  • Step S1010 The eNodeB delivers the session establishment response to the MME by using an uplink direct transmission message.
  • the MME returns a bearer setup response message to the SGW, where the message includes the bearer identifier, the user plane address and the TEID of the eNodeB, and the bearer reservation indication is required to indicate whether the SGW retains the bearer when detecting that the MME restarts.
  • Step S1012 The SGW replies to the PGW with a bearer setup response message, where the message includes a bearer identifier, a user plane address and a TEID of the SGW.
  • Step S1013 The PGW sends the IP session modification to the PCRF successfully.
  • Step S1014 The UE performs a location update process, and the MME sends the location information of the UE to the SGW by using a location update notification message.
  • the location message can be a TAI list.
  • Step S1015 The SGW returns a location update notification response message to the MME.
  • Step S1016 After the MME restarts, the SGW detects that the MME restarts, and the SGW deletes the bearer and retains part of the bearer according to the bearer retention policy.
  • Step S1017 The SGW receives downlink data on the reserved bearer, and the SGW sends a downlink data arrival notification message to the MME, where the message carries the user IMSI and the stored user location information.
  • Step S1018 The MME sends a location update request message to the HSS, where the message carries a fault recovery indication.
  • Step S1019 When the MME stored by the HSS and the MME to be recovered are in effect, the HSS inserts the user equipment data into the MME.
  • Step S1020 The MME sends a paging message to all eNodeBs in the user location information acquired in step S1017, where the paging message carries the IMSI.
  • Step S1021 The eNodeB sends a paging message to the UE, where the paging message carries the IMSI.
  • Step S1022 After the UE receives the IMSI paging, the UE reattaches to the network.
  • the mobility management unit is used as an example of the MME.
  • the SGSN the processing method is similar, and therefore will not be described in detail.
  • Preferred embodiment seven The preferred embodiment 7 describes that the bearer reservation policy is determined by the mobility management unit. The difference between the preferred embodiment 7 and the preferred embodiment 1 is that the HSS carries the user location information in the user data sent to the MME.
  • FIG. 11 is a flow chart of interaction according to a preferred embodiment of the present invention. As shown in FIG. 11, the following steps S1101 to S1120 are included. Step S1101: The UE is attached to the network.
  • Step S1102 The PGW sends a bearer setup request message to the SGW, where the bearer carries the QoS, the bearer TFT, the PGW user plane address, the TEID, and the charging identifier.
  • Step S1103 The SGW sends a bearer setup request message to the MME, where the message carries the bearer QoS, the user plane address of the TFT, the SGW, the TEID, and the charging identifier.
  • Step S1104 The MME allocates a bearer identifier to the bearer, and establishes a session management request, where the session management request includes a bearer QoS, a bearer identifier, and a bearer TFT.
  • the MME sends a bearer setup request message to the eNodeB, where the message carries the session management request, the bearer QoS, the bearer identifier, the user plane address and the TEID of the SGW.
  • Step S1105 The eNodeB sends an RRC connection reconfiguration message to the UE, where the message carries a radio bearer QoS, a session management request, and a radio bearer identifier.
  • Step S1106 The UE sends an RRC Connection Reconfiguration Complete message to the eNodeB.
  • Step S1107 The eNodeB sends a bearer setup response message to the MME, and carries the user plane address and the TEID of the eNodeB.
  • Step S1108 The UE non-access stratum establishes a session establishment response, and delivers the message to the eNodeB through a direct transmission message.
  • Step S1109 The eNodeB delivers the session establishment response to the MME by using an uplink direct transmission message.
  • Step S1110 The MME replies to the SGW with a bearer setup response message, where the message includes the bearer identifier, the user plane address and the TEID of the eNodeB, and the bearer reservation indication is required to indicate whether the SGW retains the bearer when detecting that the MME restarts.
  • Step S11 The SGW replies to the PGW with a bearer setup response message, where the message includes a bearer identifier, a user plane address and a TEID of the SGW.
  • Step S1112 The UE performs a location update process, and the MME sends the location information of the UE to the HSS by using a location update notification message.
  • the location message can be a TAI list.
  • Step S1113 The HSS returns a location update notification response message to the MME.
  • Step S1114 The SGW detects that the MME restarts, and the SGW deletes the bearer according to the bearer retention policy and retains part of the bearer.
  • Step S1115 The SGW receives downlink data on the reserved bearer, and the SGW sends a downlink data arrival notification message to the MME, where the message carries the user IMSI.
  • Step S1116 The MME sends a location update request message to the HSS, where the message carries a fault recovery indication.
  • the HSS inserts the user equipment data into the MME, and the HSS may also carry the stored user location information.
  • Step S1118 The MME sends a paging message to all eNodeBs in the user location information acquired in step S1117, where the paging message carries the IMSI.
  • Step S1119 The eNodeB sends a paging message to the UE, where the paging message carries the IMSI.
  • Step S1120 After receiving the IMSI paging, the UE reattaches the UE to the network.
  • the mobility management unit is used as an example.
  • the SGSN the processing method is similar, and therefore will not be described in detail.
  • the preferred embodiment 8 describes the PCR bearer delivery bearer reservation policy.
  • the difference between the preferred implementation eighth and the preferred embodiment 2 is that the HSS carries the user location information in the user data sent to the MME.
  • FIG. 12 is an interaction flowchart of a preferred embodiment 8 according to the present invention. As shown in FIG.
  • Step S1201 The UE is attached to the network.
  • the PCRF sends a PCC policy to the PGW.
  • the PGW sends a bearer setup request message to the SGW, where the bearer carries the QoS, carries the TFT, the user plane address and the TEID of the PGW, and the charging identifier, and needs to carry a bearer reservation indication, which is used to indicate whether the SGW is detected.
  • the bearer is reserved when the MME restarts.
  • Step S1204 The SGW sends a bearer setup request message to the MME, where the message carries the bearer QoS, the host plane address and the TEID of the TFT, the SGW, and the charging identifier.
  • Step S1205 The MME allocates a bearer identifier to the bearer, and establishes a session management request, where the session management request includes a bearer QoS, a bearer identifier, and a bearer TFT.
  • the MME sends a bearer setup request message to the eNodeB, where the message carries the session management request, the bearer QoS, the bearer identifier, the user plane address and the TEID of the SGW.
  • Step S1206 The eNodeB sends an RRC connection reconfiguration message to the UE, where the message carries a radio bearer QoS, a session management request, and a radio bearer identifier.
  • Step S1207 The UE sends an RRC Connection Reconfiguration Complete message to the eNodeB.
  • Step S1208 The eNodeB sends a bearer setup response message to the MME, and carries the user plane address and the TEID of the eNodeB.
  • Step S1209 The UE non-access stratum establishes a session establishment response, and delivers the message to the eNodeB through a direct transmission message.
  • Step S1210 The eNodeB delivers the session establishment response to the MME by using an uplink direct transmission message.
  • the MME replies to the SGW with a bearer setup response message, where the message includes the bearer identifier, the user plane address and the TEID of the eNodeB, and the bearer reservation indication is required to indicate whether the SGW retains the bearer when detecting that the MME restarts.
  • Step S1212 The SGW replies to the PGW with a bearer setup response message, where the message includes a bearer identifier, a user plane address and a TEID of the SGW.
  • Step S1213 The PGW sends the IP session modification to the PCRF successfully.
  • Step S1214 The UE performs a location update process, and the MME sends the location information of the UE to the HSS by using a location update notification message.
  • the location message can be a TAI list.
  • the HSS returns a location update notification response message to the MME.
  • Step S1216 After the MME restarts, the SGW detects that the MME restarts, and the SGW deletes the bearer and retains part of the bearer according to the bearer retention policy.
  • Step S1217 The SGW receives downlink data on the reserved bearer, and the SGW sends a downlink data arrival notification message to the MME, where the message carries the user IMSI.
  • Step S1218 The MME sends a location update request message to the HSS, where the message carries a fault recovery indication.
  • Step S1219 When the MME stored by the HSS and the MME to be recovered are in effect, the HSS inserts the user equipment data into the MME. The HSS may also carry the stored user location information in step S1220.
  • the MME sends a paging message to all eNodeBs in the user location information acquired in step S1219, and the paging message carries the IMSI.
  • Step S1221 The eNodeB sends a paging message to the UE, where the paging message carries the IMSI.
  • Step S1222 After the UE receives the IMSI paging, the UE reattaches to the network.
  • the mobility management unit is taken as an example of the MME.
  • the SGSN the processing method is similar, and therefore will not be described in detail.
  • the steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and, although the logical order is shown in the flowchart, in some cases, The steps shown or described may be performed in an order different than that herein.
  • the embodiment of the invention provides a mobility management unit, which can be used to implement the processing method of the restart mobility management unit. FIG.
  • the mobility management unit includes a receiving module 132, a determining module 134, and a paging module 136.
  • the structure is described in detail below.
  • the receiving module 132 is configured to receive a downlink data arrival notification message from the serving gateway, where the downlink data arrival notification message is used to indicate that the serving gateway receives downlink data from the packet data network gateway, where the downlink data is a packet data network gateway through the service gateway.
  • the international mobile user equipment identifier of the user equipment carried in the user equipment pages the user equipment.
  • Figure 14 is a block diagram showing the structure of a mobility management unit in accordance with a preferred embodiment of the present invention.
  • the determining module 134 includes a transmitting submodule 1342 and a determining submodule 1344
  • the home subscriber server 14 includes a determining module 142 and a sending module 144.
  • the structure is described in detail below.
  • the sending sub-module 1342 is configured to send a location update request message to the home subscriber server, where the location update request message carries fault recovery indication information for requesting paging of the user equipment;
  • the connection to the sending sub-module 1342 is set to determine whether the mobility management unit to which the transmitting sub-module 1342 belongs is consistent with the mobility management unit saved by itself; the sending module 144 is connected to the determining module 142, and is set to the determination result of the determining module 142.
  • the determining submodule 1344 is connected to the sending module 144, and is configured to determine, according to the location update permission message sent by the sending module 144, the home subscriber server to allow the mobility management unit to The user equipment makes a page.
  • the mobility management unit obtains the permission through the home subscriber server, and then pages the user equipment through the international mobile user equipment identifier, so that the user equipment can be reconnected to the mobility management unit, and the mobility management is solved. After the unit is restarted, the user equipment cannot be contacted, and the user equipment is guaranteed to obtain downlink data, thereby improving the user experience.
  • the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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Abstract

本发明公开了一种重启移动性管理单元的处理方法及移动性管理单元,该方法包括:在移动性管理单元重启之后,移动性管理单元接收到来自服务网关的下行数据到达通知消息;移动性管理单元确定用户设备所属的归属用户服务器允许移动性管理单元对用户设备进行寻呼;移动性管理单元使用用户设备的国际移动用户设备识别码对用户设备进行寻呼。本发明保证了用户设备得到下行数据,进而提高了用户体验。

Description

重启移动性管理单元的处理方法及移动性管理单元 技术领域 本发明涉及通信领域, 具体而言, 涉及一种重启移动性管理单元的处理方法及移 动性管理单元。 背景技术 随着微波接入全球互通 (Worldwide Interoperability for Microwave Access, 简称为 WiMAx) 的异军突起, 第三代移动通信系统要保持其在移动通信领域的强有力的竞争 力,必须提高其网络性能和降低网络建设及运营成本。因此,第三代合作伙伴计划(3rd Generation Partnership Project, 简称为 3GPP) 的标准化工作组, 目前正致力于研究包 交换核心网 (Packet Switch Core, 简称为 PS Core) 和全球移动通信系统无线接入网 (Universal Mobile Telecommunication System Radio Access Network, 简称为 UTRAN) 的演进, 这个研究的课题叫做系统架构演进 (System Architecture Evolution, 简称为 SAE), 目的是使得演进的分组网 (Evolved Packet Core, 简称为 EPC) 可提供更高的 传输速率、更短的传输延时,优化分组,及支持演进的通用陆地无线接入网络(Evolved Universal Terrestrial Radio Access Network, 简称为 E-UTRAN)、 无线局域网 (Wireless Local Area Network, 简称为 WLAN) 及其他非 3GPP的接入网络之间的移动性管理。 目前 SAE的架构如图 1所示, 其中包含了如下网元: 演进的无线接入网 (Evolved RAN, 简称为 E-RAN): 可以提供更高的上 /下行速 率、 更低的传输延迟和更加可靠的无线传输。 E-RAN 中包含的网元是演进节点 B (Evolved NodeB, 简称为 eNodeB), 用于为用户设备的接入提供无线资源。 分组数据网 (Packet Data Network, 简称为 PDN): 为用户设备提供业务的网络。 演进的分组网 (E-Packet Core), 提供了更低的延迟, 并允许更多的无线接入系统 接入。 其包含如下网元: 移动性管理实体(Mobility Management Entity, 简称为 MME): 控制面功能实体, 临时存储用户设备数据的服务器, 负责管理和存储用户设备(User Equipment, 简称为 UE) 的上下文 (比如 UE/用户设备标识, 移动性管理状态, 用户设备安全参数等), 为用户设备分配临时标识, 当 UE驻扎在该跟踪区域或者该网络时, 负责对该用户设 备进行鉴权;处理 MME和 UE之间的所有非接入层消息;触发在 SAE的寻呼。在 SAE 系统中, 移动性管理单元是 MME。 在 UMTS系统中, 移动性管理单元是服务通用分 组无线业务支持节点 (Serving General Packet Radio Service Support Node, 简称为 SGSN 服务网关(Serving Gateway, 简称为 SGW)是一个用户面实体, 负责用户面数据 路由处理, 终结处于空闲 (ECM_IDLE) 状态的 UE的下行数据。 管理和存储 UE的 SAE承载 (bearer) 上下文, 比如 IP承载业务参数和网络内部路由信息等。 SGW是 3GPP系统内部用户面的锚点, 一个用户设备在一个时刻只能有一个 SGW。 分组数据网络网关 (PDN Gateway, 简称为 PGW), 负责 UE接入 PDN的网关, 分配用户设备 IP地址, 同时是 3GPP和非 3GPP接入系统的移动性锚点, PGW的功能 还包括策略实施、 计费支持。用户设备在同一时刻能够接入多个 PGW。策略和计费执 行功能 (Policy and Charging Enforcement Function, 简称为 PCEF) 也位于 PGW中。 策略与计费规则功能实体 (Policy and Charging Rules Function, 简称为 PCRF) 负 责向 PCEF提供策略控制与计费规则。 归属用户服务器 (Home Subscriber Server, 简称为 HSS) 永久存储用户设备签约 数据, HSS 存储的内容包括 UE 的国际移动用户设备识别码 (International Mobie Subscriber Identity, 简称为 IMSI)、 PGW的 IP地址。 在物理上, SGW和 PGW可能合一。 EPC系统用户面网元包括 SGW和 PGW。 在 SAE系统中, SGW具有缓存处于空闲状态的 UE下行数据的功能。当 UE处于 空闲模式下, SGW收到来自 PGW向 UE下发的下行数据时, 由于 SGW不知道 UE 所处服务 eNodeB的地址, 因此 SGW不能及时下发下行数据, 因此 SGW需对收到的 下行数据进行缓存, 同时需要向 MME 发送下行数据到达通知消息 (Downlink Data Notification), 由 MME触发寻呼 (Paging)。 在一定时间内如果 MME收到寻呼响应, 那么 Serving GW可以及时获得 eNodeB的地址, 可以向 eNodeB下发缓存的数据, 具 体的流程如图 2所示。 但是当 SGW没有相关的承载信息时, SGW只能丢弃到达的下 行数据包, 并且无法向 MME发送下行数据到达通知消息。 当 UE所处的覆盖区发生改变, 例如, 从一个移动性管理单元覆盖区移动到另一 个移动性管理单元覆盖区时, UE通过监听广播信道发现进入到了一个未注册的区域, 为了保证 UE与核心网之间的业务连续,则需要在新的 RAT覆盖区下进行注册,因此, UE会发起跟踪区更新(Tracking Area Update, 简称为 TAU)或者路由区更新(Routing Area Update, 简称为 RAU) 流程。 图 3为注册在 E-UTRAN覆盖区下的 UE移动到另 一个 MME覆盖区下引发的 TAU流程。 对于注册在 E-UTRAN覆盖区下的 UE移动到 UTRAN覆盖区下引发的 RAU流程, 故不做赘述。 如图 3所示, 包括以下步骤: 步骤 S301, UE移动到另外一个 MME下的 E-UTRAN覆盖区, 向新 MME发送跟 踪区更新请求, 请求在新的区域进行注册, 请求消息中携带旧 MME 为 UE 分配的 GUTIo 步骤 S302, 新 MME根据 GUTI标识找到旧 MME, 发送上下文请求信令进行上 下文获取过程。 步骤 S303 , 旧 MME将用户设备的移动管理和承载信息发送给新 MME, BP, 进 行上下文响应。 步骤 S304, 新 MME收到相应的信息后对上下文进行确认, SP, 上下文确认。 步骤 S305, 新 MME向 SGW发起更新承载请求, 请求消息中携带源 GTP-C隧道 标识和目的 GTP-C隧道标识, SGW更新承载的绑定关系。 步骤 S306, SGW向 PGW发送更新承载请求, 将 SGW的地址信息、 隧道标识信 息、 接入技术类型等参数发送给 PGW。 步骤 S307, PGW更新自己的上下文并向 SGW返回更新承载响应信息,信息内容 包括 PGW的地址和隧道标识等。 步骤 S308, SGW向新 MME返回更新承载响应, 将 SGW指定的目的 GTP-C隧 道标识、 自身的地址、 以及 PGW的地址和隧道信息等带给 MME。 步骤 S309, 新 MME通过位置更新消息通知 HSS注册位置的改变。 步骤 S310, HSS向旧 MME发送位置取消信令, 只维护新 MME的注册。 步骤 S311 , 旧 MME向 HSS返回位置取消响应。 步骤 S312, HSS对新 MME的位置更新进行确认。 步骤 S313, 如果新 MME确认 UE在当前的跟踪区内有效, 则向 UE发送跟踪区 更新接受消息, 该消息中携带周期性跟踪区更新定时器, 目前标准协议中推荐值是 54 分钟。 步骤 S314, 如果新 MME通过 TAU流程为 UE分配了一个新的 GUTI标识, 那么
UE会返回跟踪区更新完成消息向 MME进行确认。 在实际网络中, MME可能由于系统不稳定或者升级导致重启。 在移动性管理单 元重启之后, 移动性管理单元将不能联系到用户设备, 从而造成该用户设备无法得到 下行数据, 另一方面当用户有上行数据需要发送时, 用户会主动联系网络, 并可能进 入另外的移动管理单元, 如果待恢复的移动性管理单元还对用户进行 IMSI 寻呼, 那 么用户又将进入去附着状态, 造成用户业务中断, 进而造成用户体验不好。 发明内容 针对移动性管理单元重启之后不能联系到用户设备的问题而提出本发明, 为此, 本发明的主要目的在于提供一种重启移动性管理单元的处理方法及移动性管理单元, 以解决上述问题。 为了实现上述目的, 根据本发明的一个方面, 提供了一种重启移动性管理单元的 处理方法。 根据本发明的重启移动性管理单元的处理方法包括:在移动性管理单元重启之后, 移动性管理单元接收到来自服务网关的下行数据到达通知消息; 移动性管理单元确定 用户设备所属的归属用户服务器允许移动性管理单元对用户设备进行寻呼; 移动性管 理单元使用用户设备的国际移动用户设备识别码对用户设备进行寻呼。 移动性管理单元确定用户设备所属的归属用户服务器允许移动性管理单元对用户 设备进行寻呼包括: 移动性管理单元向归属用户服务器发送位置更新请求消息, 其中 位置更新请求消息携带有用于请求对用户设备进行寻呼的故障恢复指示信息; 归属用 户服务器判断移动性管理单元与自身保存的移动性管理单元是否一致; 如果判断结果 为是, 则归属用户服务器向移动性管理单元发送位置更新允许消息; 移动性管理单元 根据位置更新允许消息, 确定归属用户服务器允许移动性管理单元对用户设备进行寻 呼。 如果判断结果为否,则归属用户服务器向移动性管理单元发送位置更新拒绝消息, 并在位置更新拒绝消息中携带拒绝移动性管理单元的原因值。 在归属用户服务器向移动性管理单元发送位置更新拒绝消息之后, 上述方法还包 括: 移动性管理单元向服务网关发送下行数据失败指示消息, 其中下行数据失败指示 消息用于指示服务网关删除服务网关与分组数据网络网关之间的承载。 在服务网关接收来自分组数据网络网关的下行数据之前, 上述方法还包括: 服务 网关检测到移动性管理单元重启或者链路不正常; 服务网关保留服务网关与分组数据 网络网关之间的承载, 其中承载是在承载建立过程中由移动性管理单元或者策略与计 费规则功能实体确定的; 服务网关在承载上接收下行数据。 下行数据到达通知消息还携带有用户位置信息; 移动性管理单元使用国际移动用 户设备识别码和用户位置信息进行寻呼。 在移动性管理单元确定用户设备所属的归属用户服务器允许移动性管理单元对用 户设备进行寻呼之后, 上述方法还包括: 移动性管理单元接收到来自归属用户服务器 的用户位置信息; 移动性管理单元使用国际移动用户设备识别码和用户位置信息进行 寻呼。 移动性管理单元包括以下之一: MME, SGSN。 为了实现上述目的, 根据本发明的另一个方面, 还提供了一种移动性管理单元。 根据本发明的移动性管理单元包括: 接收模块, 设置为接收来自服务网关的下行 数据到达通知消息; 确定模块, 设置为确定用户设备所属的归属用户服务器允许移动 性管理单元对用户设备进行寻呼; 寻呼模块, 设置为使用用户设备的国际移动用户设 备识别码对用户设备进行寻呼。 确定模块包括: 发送子模块, 设置为向归属用户服务器发送位置更新请求消息, 其中位置更新请求消息携带有用于请求对用户设备进行寻呼的故障恢复指示信息; 归 属用户服务器包括: 判断模块, 设置为判断移动性管理单元与自身保存的移动性管理 单元是否一致; 发送模块, 设置为在判断结果为是的情况下向移动性管理单元发送位 置更新允许消息; 确定模块还包括: 确定子模块, 设置为根据位置更新允许消息, 确 定归属用户服务器允许移动性管理单元对用户设备进行寻呼。 通过本发明, 移动性管理单元通过归属用户服务器获得允许, 然后通过国际移动 用户设备识别码对该用户设备进行寻呼, 从而可以实现该用户设备重新连接到移动性 管理单元, 解决了移动性管理单元重启之后不能联系到用户设备的问题, 保证该用户 设备得到下行数据, 进而提高了用户体验。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部分, 本发 明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的不当限定。 在附图 中: 图 1是根据相关技术的演进分组网络系统结构的示意图; 图 2是根据相关技术的网络发起业务请求的交互流程图; 图 3是根据相关技术的正常跟踪区更新的交互流程图; 图 4是根据本发明实施例的重启移动性管理单元的处理方法的流程图; 图 5是根据本发明优选实施例一的交互流程图; 图 6是根据本发明优选实施例二的交互流程图; 图 7是根据本发明优选实施例三的交互流程图; 图 8是根据本发明优选实施例四的交互流程图; 图 9是根据本发明优选实施例五的交互流程图; 图 10是根据本发明优选实施例六的交互流程图; 图 11是根据本发明优选实施例七的交互流程图; 图 12是根据本发明优选实施例八的交互流程图; 图 13是根据本发明实施例的移动性管理单元的结构框图; 图 14是根据本发明优选实施例的移动性管理单元的结构框图。 具体实施方式 需要说明的是, 在不冲突的情况下, 本申请中的实施例及实施例中的特征可以相 互组合。 下面将参考附图并结合实施例来详细说明本发明。 本发明提供了一种重启移动性管理单元的处理方法, 图 4是根据本发明实施例的 重启移动性管理单元的处理方法的流程图,如图 4所示,包括如下的步骤 S402至步骤 S406。 步骤 S402, 在移动性管理单元重启之后, 移动性管理单元接收到来自服务网关的 下行数据到达通知消息, 其中下行数据到达通知消息用于指示服务网关接收到来自分 组数据网络网关的下行数据, 其中下行数据是分组数据网络网关通过服务网关发送给 用户设备的数据。 步骤 S404,移动性管理单元确定用户设备所属的归属用户服务器允许移动性管理 单元对用户设备进行寻呼。 步骤 S406,移动性管理单元使用下行数据到达通知消息中携带的用户设备的国际 移动用户设备识别码对用户设备进行寻呼。 相关技术中, 在移动性管理单元重启之后, 移动性管理单元将不能联系到用户设 备。 本发明实施例中, 移动性管理单元通过归属用户服务器获得允许, 然后通过国际 移动用户设备识别码对该用户设备进行寻呼, 从而可以实现该用户设备重新连接到移 动性管理单元, 并保证该用户设备得到该下行数据, 进而提高了用户体验。 需要说明的是, 上述用户设备的国际移动用户设备识别码可以是下行数据到达通 知消息中携带的, 也可以是归属用户服务器预先发送给移动性管理单元的, 还可以是 移动性管理单元通过其它方式获取的, 本发明对此不进行限定。 优选地, 移动性管理单元确定用户设备所属的归属用户服务器允许移动性管理单 元对用户设备进行寻呼包括: 移动性管理单元向归属用户服务器发送位置更新请求消 息,其中位置更新请求消息携带有用于请求对用户设备进行寻呼的故障恢复指示信息; 归属用户服务器判断移动性管理单元与自身保存的移动性管理单元是否一致; 如果判 断结果为是, 则归属用户服务器向移动性管理单元发送位置更新允许消息; 移动性管 理单元根据位置更新允许消息, 确定归属用户服务器允许移动性管理单元对用户设备 进行寻呼。 本优选实施例中, 如果移动性管理单元与归属用户服务器自身保存的移动性管理 单元一致, 则由该移动性管理单元对用户设备进行寻呼, 其实现方式简单、 可靠。 优选地, 如果判断结果为否, 则归属用户服务器向移动性管理单元发送位置更新 拒绝消息, 并在位置更新拒绝消息中携带拒绝移动性管理单元的原因值。 本优选实施例中, 该原因值可以为用户设备已经在另外一个移动性管理单元中注 册。 优选地, 在归属用户服务器向移动性管理单元发送位置更新拒绝消息之后, 移动 性管理单元向服务网关发送下行数据失败指示消息, 其中下行数据失败指示消息用于 指示服务网关删除服务网关与分组数据网络网关之间的承载。 本优选实施例中, 对服务网关与分组数据网络网关之间的承载进行删除, 可以节 约网络资源。 优选地, 在服务网关接收来自分组数据网络网关的下行数据之前, 服务网关检测 到移动性管理单元重启或者链路不正常; 服务网关保留服务网关与分组数据网络网关 之间的承载, 其中该承载是在承载建立过程中由移动性管理单元或者策略与计费规则 功能实体确定的; 服务网关在承载上接收下行数据。 在实际网络中, 如果服务网关检测到移动性管理单元重启, 服务网关会本地删除 所有与分组数据网络网关之间的相关的承载信息和用户设备信息。 本优选实施例中, 在服务网关与分组数据网络网关之间保留部分承载, 然后服务网关在该部分承载上接 收下行数据, 从而可以保证该用户设备得到该下行数据, 进而提高了用户体验。 优选地, 下行数据到达通知消息还携带有用户位置信息; 移动性管理单元使用国 际移动用户设备识别码和用户位置信息进行寻呼。 本优选实施例中, 通过结合使用国际移动用户设备识别码和用户位置信息进行寻 呼, 可以缩小移动性管理单元的寻呼范围。 优选地, 下行数据到达通知消息携带的用户位置信息是由用户设备在移动性管理 过程中由移动性管理单元通知到服务网关的。 优选地, 在移动性管理单元确定用户设备所属的归属用户服务器允许移动性管理 单元对用户设备进行寻呼之后, 移动性管理单元接收到来自归属用户服务器的用户位 置信息和 /或用户签约信息; 移动性管理单元使用国际移动用户设备识别码和用户位置 信息进行寻呼。 本优选实施例中, 通过结合使用国际移动用户设备识别码和用户位置信息进行寻 呼, 可以缩小移动性管理单元的寻呼范围。 本优选实施例中, 通过在确定过程中插入用户签约信息, 用户在下次附着到该移 动性管理单元时可以避免再次插入用户签约数据, 节省了网络信令。 优选地, 移动性管理单元包括以下之一: MME, SGSN。 本发明还提供了八个优选实施例, 结合了上述多个优选实施例的技术方案, 下面 结合图 5至图 12来详细描述。 优选实施例一 本优选实施例一描述了由移动性管理单元决定承载保留策略。 图 5是根据本发明优选实施例一的交互流程图,如图 5所示,包括如下的步骤 S501 至步骤 S520。 步骤 S501, UE附着到网络中。 步骤 S502,PGW向 SGW发送承载建立请求消息,该消息中携带承载 QoS(Quality of Service, 服务质量), 承载 TFT, PGW的用户面地址和 TEID, 计费标识。 步骤 S503, SGW向 MME发送承载建立请求消息, 该消息中携带承载 QoS, 承 载 TFT, SGW的用户面地址和 TEID, 计费标识。 步骤 S504, MME为承载分配一个承载标识, 并且建立会话管理请求, 会话管理 请求中包括承载 QoS,承载标识,承载 TFT。 MME向 eNodeB发送承载建立请求消息, 该消息中携带会话管理请求, 承载 QoS, 承载标识, SGW的用户面地址和 TEID。 步骤 S505, eNodeB 向 UE发送 RRC连接重配置消息, 该消息中携带无线承载 QoS, 会话管理请求, 无线承载标识。 步骤 S506, UE向 eNodeB发送 RRC连接重配置完成消息。 步骤 S507, eNodeB向 MME发送承载建立响应消息, 携带 eNodeB的用户面地址 禾口 TEID。 步骤 S508, UE非接入层建立会话建立响应, 并通过直传消息传递给 eNodeB。 步骤 S509, eNodeB通过上行直传消息将会话建立响应传递至 MME。 步骤 S510, MME向 SGW回复承载建立响应消息,消息中包括承载标识, eNodeB 的用户面地址和 TEID, 同时需要携带承载保留指示, 用于指示 SGW是否在检测到 MME重启时保留承载。 步骤 S511, SGW向 PGW回复承载建立响应消息, 消息中包括承载标识, SGW 的用户面地址和 TEID。 步骤 S512, MME重启。 步骤 S513, SGW检测到 MME重启, SGW根据承载保留策略, 删除承载并保留 部分承载。 步骤 S514, MME恢复。 步骤 S515, SGW在保留的承载上收到下行数据, SGW向 MME发送下行数据到 达通知消息, 该消息携带用户 IMSI。 步骤 S516, MME向 HSS发送位置更新请求消息, 该消息携带故障恢复指示, 步骤 S517, HSS所存储的 MME与待故障恢复的 MME—致时, HSS将用户设备 数据插入到 MME。 步骤 S518, MME向覆盖区域内所有的 eNodeB发送寻呼消息,寻呼消息携带 IMSI。 步骤 S519, eNodeB向 UE发送寻呼消息, 寻呼消息携带 IMSI。 步骤 S520, UE收到 IMSI寻呼后, UE重新附着到网络。 本优选实施例一中是以移动性管理单元为 MME为例说明的。 对于移动性管理单 元为 SGSN, 处理方法与其类似, 故不再详细说明。 优选实施例二 本优选实施例二描述了 PCRF下发承载保留策略。 图 6是根据本发明优选实施例二的交互流程图,如图 6所示,包括如下的步骤 S601 至步骤 S620。 步骤 S601, UE附着到网络中。 步骤 S602, PCRF向 PGW发送 PCC策略。 步骤 S603, PGW向 SGW发送承载建立请求消息, 该消息中携带承载 QoS, 承载 TFT, PGW的用户面地址和 TEID, 计费标识, 同时需要携带承载保留指示, 用于指 示 SGW是否在检测到 MME重启时保留承载。 步骤 S604, SGW向 MME发送承载建立请求消息, 该消息中携带承载 QoS, 承 载 TFT, SGW的用户面地址和 TEID, 计费标识。 步骤 S605, MME为承载分配一个承载标识, 并且建立会话管理请求, 会话管理 请求中包括承载 QoS,承载标识,承载 TFT。 MME向 eNodeB发送承载建立请求消息, 该消息中携带会话管理请求, 承载 QoS, 承载标识, SGW的用户面地址和 TEID。 步骤 S606, eNodeB 向 UE发送 RRC连接重配置消息, 该消息中携带无线承载 QoS, 会话管理请求, 无线承载标识。 步骤 S607, UE向 eNodeB发送 RRC连接重配置完成消息。 步骤 S608, eNodeB向 MME发送承载建立响应消息, 携带 eNodeB的用户面地址 禾口 TEID。 步骤 S609, UE非接入层建立会话建立响应, 并通过直传消息传递给 eNodeB。 步骤 S610, eNodeB通过上行直传消息将会话建立响应传递至 MME。 步骤 S611, MME向 SGW回复承载建立响应消息,消息中包括承载标识, eNodeB 的用户面地址和 TEID, 同时需要携带承载保留指示, 用于指示 SGW是否在检测到 MME重启时保留承载。 步骤 S612, SGW向 PGW回复承载建立响应消息, 消息中包括承载标识, SGW 的用户面地址和 TEID。 步骤 S613, PGW向 PCRF发送 IP会话修改成功。 步骤 S614, MME重启后, SGW检测到 MME重启, SGW根据承载保留策略, 删除承载并保留部分承载。 步骤 S615, SGW在保留的承载上收到下行数据, SGW向 MME发送下行数据到 达通知消息, 该消息携带用户 IMSI。 步骤 S616, MME向 HSS发送位置更新请求消息, 该消息携带故障恢复指示。 步骤 S617, HSS所存储的 MME与待故障恢复的 MME—致时, HSS将用户设备 数据插入到 MME。 步骤 S618, MME向覆盖区域内所有的 eNodeB发送寻呼消息,寻呼消息携带 IMSI。 步骤 S619, eNodeB向 UE发送寻呼消息, 寻呼消息携带 IMSI。 步骤 S620, UE收到 IMSI寻呼后, UE重新附着到网络。 本优选实施例二中是以移动性管理单元为 MME为例说明的。 对于移动性管理单 元为 SGSN, 处理方法与其类似, 故不再详细说明。 优选实施例三 本优选实施例三描述了由移动性管理单元决定承载保留策略, 本优选实施三与优 选实施例一的区别是 HSS所存储的 MME与待故障恢复的 MME不一致, HSS拒绝位 置更新过程。 图 7是根据本发明优选实施例三的交互流程图,如图 7所示,包括如下的步骤 S701 至步骤 S720。 步骤 S701, UE附着到网络中。 步骤 S702, PGW向 SGW发送承载建立请求消息, 该消息中携带承载 QoS, 承载
TFT, PGW的用户面地址和 TEID, 计费标识。 步骤 S703, SGW向 MME发送承载建立请求消息, 该消息中携带承载 QoS, 承 载 TFT, SGW的用户面地址和 TEID, 计费标识。 步骤 S704, MME为承载分配一个承载标识, 并且建立会话管理请求, 会话管理 请求中包括承载 QoS,承载标识,承载 TFT。 MME向 eNodeB发送承载建立请求消息, 该消息中携带会话管理请求, 承载 QoS, 承载标识, SGW的用户面地址和 TEID。 步骤 S705, eNodeB 向 UE发送 RRC连接重配置消息, 该消息中携带无线承载 QoS, 会话管理请求, 无线承载标识。 步骤 S706, UE向 eNodeB发送 RRC连接重配置完成消息。 步骤 S707, eNodeB向 MME发送承载建立响应消息, 携带 eNodeB的用户面地址 禾口 TEID。 步骤 S708, UE非接入层建立会话建立响应, 并通过直传消息传递给 eNodeB。 步骤 S709, eNodeB通过上行直传消息将会话建立响应传递至 MME。 步骤 S710, MME向 SGW回复承载建立响应消息,消息中包括承载标识, eNodeB 的用户面地址和 TEID, 同时需要携带承载保留指示, 用于指示 SGW是否在检测到 MME重启时保留承载。 步骤 S711, SGW向 PGW回复承载建立响应消息, 消息中包括承载标识, SGW 的用户面地址和 TEID。 步骤 S712, MME重启。 步骤 S713, SGW检测到 MME重启, SGW根据承载保留策略, 删除承载并保留 部分承载。 步骤 S714, MME恢复。 步骤 S715, SGW在保留的承载上收到下行数据, SGW向 MME发送下行数据到 达通知消息, 该消息携带用户 IMSI。 步骤 S716, MME向 HSS发送位置更新请求消息, 该消息携带故障恢复指示, 步骤 S717, HSS所存储的 MME与待故障恢复的 MME不一致时, HSS拒绝位置 更新过程, 并且携带相应的原因值, 从原因值, MME可以得知 UE 已经在另外一个 MME中注册。 步骤 S718, MME向 SGW发送下行数据失败指示消息, SGW释放缓存的数据。 步骤 S719, SGW向 PGW发送释放会话请求消息, 用于释放 SGW与 PGW之间 的承载。 步骤 S720, PGW向 SGW回复释放会话响应消息。 本优选实施例三中是以移动性管理单元为 MME为例说明的。 对于移动性管理单 元为 SGSN, 处理方法与其类似, 故不再详细说明。 优选实施例四 本优选实施例四描述了 PCRF下发承载保留策略, 本优选实施四与优选实施例二 的区别是 HSS所存储的 MME与待故障恢复的 MME不一致, HSS拒绝位置更新过程。 图 8是根据本发明优选实施例四的交互流程图,如图 8所示,包括如下的步骤 S801 至步骤 S820。 步骤 S801, UE附着到网络中。 步骤 S802, PCRF向 PGW发送 PCC策略。 步骤 S803, PGW向 SGW发送承载建立请求消息, 该消息中携带承载 QoS, 承载 TFT, PGW的用户面地址和 TEID, 计费标识, 同时需要携带承载保留指示, 用于指 示 SGW是否在检测到 MME重启时保留承载。 步骤 S804, SGW向 MME发送承载建立请求消息, 该消息中携带承载 QoS, 承 载 TFT, SGW的用户面地址和 TEID, 计费标识。 步骤 S805, MME为承载分配一个承载标识, 并且建立会话管理请求, 会话管理 请求中包括承载 QoS,承载标识,承载 TFT。 MME向 eNodeB发送承载建立请求消息, 该消息中携带会话管理请求, 承载 QoS, 承载标识, SGW的用户面地址和 TEID。 步骤 S806, eNodeB 向 UE发送 RRC连接重配置消息, 该消息中携带无线承载
QoS, 会话管理请求, 无线承载标识。 步骤 S807, UE向 eNodeB发送 RRC连接重配置完成消息。 步骤 S808, eNodeB向 MME发送承载建立响应消息, 携带 eNodeB的用户面地址 禾口 TEID。 步骤 S809, UE非接入层建立会话建立响应, 并通过直传消息传递给 eNodeB。 步骤 S810, eNodeB通过上行直传消息将会话建立响应传递至 MME。 步骤 S811, MME向 SGW回复承载建立响应消息,消息中包括承载标识, eNodeB 的用户面地址和 TEID, 同时需要携带承载保留指示, 用于指示 SGW是否在检测到 MME重启时保留承载。 步骤 S812, SGW向 PGW回复承载建立响应消息, 消息中包括承载标识, SGW 的用户面地址和 TEID。 步骤 S813, PGW向 PCRF发送 IP会话修改成功。 步骤 S814, MME重启后, SGW检测到 MME重启, SGW根据承载保留策略, 删除承载并保留部分承载。 步骤 S815, SGW在保留的承载上收到下行数据, SGW向 MME发送下行数据到 达通知消息, 该消息携带用户 IMSI。 步骤 S816, MME向 HSS发送位置更新请求消息, 该消息携带故障恢复指示。 步骤 S817, HSS所存储的 MME与待故障恢复的 MME不一致时, HSS拒绝位置 更新过程, 并且携带相应的原因值, 从原因值, MME可以得知 UE 已经在另外一个 MME中注册。 步骤 S818, MME向 SGW发送下行数据失败指示消息, SGW释放缓存的数据。 步骤 S819, SGW向 PGW发送释放会话请求消息, 用于释放 SGW与 PGW之间 的承载。 步骤 S820, PGW向 SGW回复释放会话响应消息。 本优选实施例四中是以移动性管理单元为 MME为例说明的。 对于移动性管理单 元为 SGSN, 处理方法与其类似, 故不再详细说明。 优选实施例五 本优选实施例五描述了由移动性管理单元决定承载保留策略, 本优选实施五与优 选实施例一的区别是 SGW在下行数据到达通知消息中携带用户 IMSI和用户位置信 息。 图 9是根据本发明优选实施例五的交互流程图,如图 9所示,包括如下的步骤 S901 至步骤 S920。 步骤 S901, UE附着到网络中。 步骤 S902, PGW向 SGW发送承载建立请求消息, 该消息中携带承载 QoS, 承载 TFT, PGW的用户面地址和 TEID, 计费标识。 步骤 S903, SGW向 MME发送承载建立请求消息, 该消息中携带承载 QoS, 承 载 TFT, SGW的用户面地址和 TEID, 计费标识。 步骤 S904, MME为承载分配一个承载标识, 并且建立会话管理请求, 会话管理 请求中包括承载 QoS,承载标识,承载 TFT。 MME向 eNodeB发送承载建立请求消息, 该消息中携带会话管理请求, 承载 QoS, 承载标识, SGW的用户面地址和 TEID。 步骤 S905, eNodeB 向 UE发送 RRC连接重配置消息, 该消息中携带无线承载 QoS, 会话管理请求, 无线承载标识。 步骤 S906, UE向 eNodeB发送 RRC连接重配置完成消息。 步骤 S907, eNodeB向 MME发送承载建立响应消息, 携带 eNodeB的用户面地址 禾口 TEID。 步骤 S908, UE非接入层建立会话建立响应, 并通过直传消息传递给 eNodeB。 步骤 S909, eNodeB通过上行直传消息将会话建立响应传递至 MME。 步骤 S910, MME向 SGW回复承载建立响应消息,消息中包括承载标识, eNodeB 的用户面地址和 TEID, 同时需要携带承载保留指示, 用于指示 SGW是否在检测到 MME重启时保留承载。 步骤 S911, SGW向 PGW回复承载建立响应消息, 消息中包括承载标识, SGW 的用户面地址和 TEID。 步骤 S912, UE发生位置更新过程, MME通过位置更新通知消息将 UE的位置信 息发送给 SGW。 该位置消息可以是 TAI list。 步骤 S913, SGW向 MME返回位置更新通知响应消息。 步骤 S914, SGW检测到 MME重启, SGW根据承载保留策略, 删除承载并保留 部分承载。 步骤 S915, SGW在保留的承载上收到下行数据, SGW向 MME发送下行数据到 达通知消息, 该消息携带用户 IMSI和存储的用户位置信息。 步骤 S916, MME向 HSS发送位置更新请求消息, 该消息携带故障恢复指示, 步骤 S917, HSS所存储的 MME与待故障恢复的 MME—致时, HSS将用户设备 数据插入到 MME。 步骤 S918, MME向步骤 S915中获取的用户位置信息内所有的 eNodeB发送寻呼 消息, 寻呼消息携带 IMSI。 步骤 S919, eNodeB向 UE发送寻呼消息, 寻呼消息携带 IMSI。 步骤 S920, UE收到 IMSI寻呼后, UE重新附着到网络。 本优选实施例五中是以移动性管理单元为 MME为例说明的。 对于移动性管理单 元为 SGSN, 处理方法与其类似, 故不再详细说明。 优选实施例六 本优选实施例六描述了 PCRF下发承载保留策略, 本优选实施六与优选实施例二 的区别是 SGW在下行数据到达通知消息中携带用户 IMSI和用户位置信息。 图 10是根据本发明优选实施例六的交互流程图, 如图 10所示, 包括如下的步骤
S1001至步骤 S1022。 步骤 S1001 , UE附着到网络中。 步骤 S1002, PCRF向 PGW发送 PCC策略。 步骤 S1003 , PGW向 SGW发送承载建立请求消息, 该消息中携带承载 QoS, 承 载 TFT, PGW的用户面地址和 TEID, 计费标识, 同时需要携带承载保留指示, 用于 指示 SGW是否在检测到 MME重启时保留承载。 步骤 S1004, SGW向 MME发送承载建立请求消息, 该消息中携带承载 QoS, 承 载 TFT, SGW的用户面地址和 TEID, 计费标识。 步骤 S1005, MME为承载分配一个承载标识, 并且建立会话管理请求, 会话管理 请求中包括承载 QoS,承载标识,承载 TFT。 MME向 eNodeB发送承载建立请求消息, 该消息中携带会话管理请求, 承载 QoS, 承载标识, SGW的用户面地址和 TEID。 步骤 S1006, eNodeB向 UE发送 RRC连接重配置消息, 该消息中携带无线承载 QoS, 会话管理请求, 无线承载标识。 步骤 S1007, UE向 eNodeB发送 RRC连接重配置完成消息。 步骤 S1008, eNodeB向 MME发送承载建立响应消息, 携带 eNodeB的用户面地 址和 TEID。 步骤 S1009, UE非接入层建立会话建立响应, 并通过直传消息传递给 eNodeB。 步骤 S1010, eNodeB通过上行直传消息将会话建立响应传递至 MME。 步骤 S1011,MME向 SGW回复承载建立响应消息,消息中包括承载标识, eNodeB 的用户面地址和 TEID, 同时需要携带承载保留指示, 用于指示 SGW是否在检测到 MME重启时保留承载。 步骤 S1012, SGW向 PGW回复承载建立响应消息, 消息中包括承载标识, SGW 的用户面地址和 TEID。 步骤 S1013 , PGW向 PCRF发送 IP会话修改成功。 步骤 S1014, UE发生位置更新过程, MME通过位置更新通知消息将 UE的位置 信息发送给 SGW。 该位置消息可以是 TAI list。 步骤 S1015, SGW向 MME返回位置更新通知响应消息。 步骤 S1016, MME重启后, SGW检测到 MME重启, SGW根据承载保留策略, 删除承载并保留部分承载。 步骤 S1017, SGW在保留的承载上收到下行数据, SGW向 MME发送下行数据 到达通知消息, 该消息携带用户 IMSI和存储的用户位置信息。 步骤 S1018, MME向 HSS发送位置更新请求消息, 该消息携带故障恢复指示。 步骤 S1019, HSS所存储的 MME与待故障恢复的 MME—致时, HSS将用户设 备数据插入到 MME。 步骤 S1020, MME向步骤 S 1017中获取的用户位置信息内所有的 eNodeB发送寻 呼消息, 寻呼消息携带 IMSI。 步骤 S1021 , eNodeB向 UE发送寻呼消息, 寻呼消息携带 IMSI。 步骤 S1022, UE收到 IMSI寻呼后, UE重新附着到网络。 本优选实施例六中是以移动性管理单元为 MME为例说明的。 对于移动性管理单 元为 SGSN, 处理方法与其类似, 故不再详细说明。 优选实施例七 本优选实施例七描述了由移动性管理单元决定承载保留策略, 本优选实施七与优 选实施例一的区别是 HSS在向 MME发送的用户数据中携带用户位置信息。 图 11是根据本发明优选实施例七的交互流程图, 如图 11所示, 包括如下的步骤 S1101至步骤 S1120。 步骤 S1101 , UE附着到网络中。 步骤 S1102, PGW向 SGW发送承载建立请求消息, 该消息中携带承载 QoS, 承 载 TFT, PGW的用户面地址和 TEID, 计费标识。 步骤 S1103 , SGW向 MME发送承载建立请求消息, 该消息中携带承载 QoS, 承 载 TFT, SGW的用户面地址和 TEID, 计费标识。 步骤 S1104, MME为承载分配一个承载标识, 并且建立会话管理请求, 会话管理 请求中包括承载 QoS,承载标识,承载 TFT。 MME向 eNodeB发送承载建立请求消息, 该消息中携带会话管理请求, 承载 QoS, 承载标识, SGW的用户面地址和 TEID。 步骤 S1105, eNodeB向 UE发送 RRC连接重配置消息, 该消息中携带无线承载 QoS, 会话管理请求, 无线承载标识。 步骤 S1106, UE向 eNodeB发送 RRC连接重配置完成消息。 步骤 S1107, eNodeB向 MME发送承载建立响应消息, 携带 eNodeB的用户面地 址和 TEID。 步骤 S1108, UE非接入层建立会话建立响应, 并通过直传消息传递给 eNodeB。 步骤 S1109, eNodeB通过上行直传消息将会话建立响应传递至 MME。 步骤 S1110, MME向 SGW回复承载建立响应消息,消息中包括承载标识, eNodeB 的用户面地址和 TEID, 同时需要携带承载保留指示, 用于指示 SGW是否在检测到 MME重启时保留承载。 步骤 Sllll , SGW向 PGW回复承载建立响应消息, 消息中包括承载标识, SGW 的用户面地址和 TEID。 步骤 S1112, UE发生位置更新过程, MME通过位置更新通知消息将 UE的位置 信息发送给 HSS。 该位置消息可以是 TAI list。 步骤 S1113 , HSS向 MME返回位置更新通知响应消息。 步骤 S1114, SGW检测到 MME重启, SGW根据承载保留策略, 删除承载并保留 部分承载。 步骤 S1115, SGW在保留的承载上收到下行数据, SGW向 MME发送下行数据到 达通知消息, 该消息携带用户 IMSI。 步骤 S1116, MME向 HSS发送位置更新请求消息, 该消息携带故障恢复指示。 步骤 S1117, HSS所存储的 MME与待故障恢复的 MME—致时, HSS将用户设 备数据插入到 MME, HSS还可以携带存储的用户位置信息。 步骤 S1118, MME向步骤 S1117中获取的用户位置信息内所有的 eNodeB发送寻 呼消息, 寻呼消息携带 IMSI。 步骤 S1119, eNodeB向 UE发送寻呼消息, 寻呼消息携带 IMSI。 步骤 S1120, UE收到 IMSI寻呼后, UE重新附着到网络。 本优选实施例七中是以移动性管理单元为 MME为例说明的。 对于移动性管理单 元为 SGSN, 处理方法与其类似, 故不再详细说明。 优选实施例八 本优选实施例八描述了 PCRF下发承载保留策略, 本优选实施八与优选实施例二 的区别是 HSS在向 MME发送的用户数据中携带用户位置信息。 图 12是根据本发明优选实施例八的交互流程图, 如图 12所示, 包括如下的步骤 S1201至步骤 S1222。 步骤 S1201 , UE附着到网络中。 步骤 S1202, PCRF向 PGW发送 PCC策略。 步骤 S 1203, PGW向 SGW发送承载建立请求消息, 该消息中携带承载 QoS, 承 载 TFT, PGW的用户面地址和 TEID, 计费标识, 同时需要携带承载保留指示, 用于 指示 SGW是否在检测到 MME重启时保留承载。 步骤 S1204, SGW向 MME发送承载建立请求消息, 该消息中携带承载 QoS, 承 载 TFT, SGW的用户面地址和 TEID, 计费标识。 步骤 S1205, MME为承载分配一个承载标识, 并且建立会话管理请求, 会话管理 请求中包括承载 QoS,承载标识,承载 TFT。 MME向 eNodeB发送承载建立请求消息, 该消息中携带会话管理请求, 承载 QoS, 承载标识, SGW的用户面地址和 TEID。 步骤 S1206, eNodeB向 UE发送 RRC连接重配置消息, 该消息中携带无线承载 QoS, 会话管理请求, 无线承载标识。 步骤 S1207, UE向 eNodeB发送 RRC连接重配置完成消息。 步骤 S1208, eNodeB向 MME发送承载建立响应消息, 携带 eNodeB的用户面地 址和 TEID。 步骤 S1209, UE非接入层建立会话建立响应, 并通过直传消息传递给 eNodeB。 步骤 S1210, eNodeB通过上行直传消息将会话建立响应传递至 MME。 步骤 S1211,MME向 SGW回复承载建立响应消息,消息中包括承载标识, eNodeB 的用户面地址和 TEID, 同时需要携带承载保留指示, 用于指示 SGW是否在检测到 MME重启时保留承载。 步骤 S1212, SGW向 PGW回复承载建立响应消息, 消息中包括承载标识, SGW 的用户面地址和 TEID。 步骤 S1213 , PGW向 PCRF发送 IP会话修改成功。 步骤 S1214, UE发生位置更新过程, MME通过位置更新通知消息将 UE的位置 信息发送给 HSS。 该位置消息可以是 TAI list。 步骤 S1215, HSS向 MME返回位置更新通知响应消息。 步骤 S1216, MME重启后, SGW检测到 MME重启, SGW根据承载保留策略, 删除承载并保留部分承载。 步骤 S1217, SGW在保留的承载上收到下行数据, SGW向 MME发送下行数据 到达通知消息, 该消息携带用户 IMSI。 步骤 S1218, MME向 HSS发送位置更新请求消息, 该消息携带故障恢复指示。 步骤 S1219, HSS所存储的 MME与待故障恢复的 MME—致时, HSS将用户设 备数据插入到 MME。 HSS还可以携带存储的用户位置信息 步骤 S1220, MME向步骤 S1219中获取的用户位置信息内所有的 eNodeB发送寻 呼消息, 寻呼消息携带 IMSI。 步骤 S1221 , eNodeB向 UE发送寻呼消息, 寻呼消息携带 IMSI。 步骤 S1222, UE收到 IMSI寻呼后, UE重新附着到网络。 本优选实施例八中是以移动性管理单元为 MME为例说明的。 对于移动性管理单 元为 SGSN, 处理方法与其类似, 故不再详细说明。 需要说明的是, 在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的 计算机系统中执行, 并且, 虽然在流程图中示出了逻辑顺序, 但是在某些情况下, 可 以以不同于此处的顺序执行所示出或描述的步骤。 本发明实施例提供了一种移动性管理单元, 该移动性管理单元可以用于实现上述 重启移动性管理单元的处理方法。图 13是根据本发明实施例的移动性管理单元的结构 框图, 如图 13所示, 该移动性管理单元包括接收模块 132, 确定模块 134和寻呼模块 136。 下面对其结构进行详细描述。 接收模块 132, 设置为接收来自服务网关的下行数据到达通知消息, 其中下行数 据到达通知消息用于指示服务网关接收到来自分组数据网络网关的下行数据, 其中下 行数据是分组数据网络网关通过服务网关发送给用户设备的数据; 确定模块 134, 连 接至接收模块 132, 设置为在接收模块 132接收到来自服务网关的下行数据到达通知 消息之后, 确定用户设备所属的归属用户服务器允许移动性管理单元对用户设备进行 寻呼; 寻呼模块 136, 连接至确定模块 134, 设置为在确定模块 134确定用户设备所属 的归属用户服务器允许移动性管理单元对用户设备进行寻呼之后, 使用下行数据到达 通知消息中携带的用户设备的国际移动用户设备识别码对用户设备进行寻呼。 图 14是根据本发明优选实施例的移动性管理单元的结构框图。 优选地, 确定模块 134包括发送子模块 1342和确定子模块 1344, 归属用户服务 器 14包括判断模块 142和发送模块 144。 下面对其结构进行详细描述。 发送子模块 1342, 设置为向归属用户服务器发送位置更新请求消息, 其中位置更 新请求消息携带有用于请求对用户设备进行寻呼的故障恢复指示信息; 判断模块 142, 连接至发送子模块 1342, 设置为判断发送子模块 1342所属的移动性管理单元与自身 保存的移动性管理单元是否一致; 发送模块 144, 连接至判断模块 142, 设置为在判断 模块 142的判断结果为是的情况下向移动性管理单元发送位置更新允许消息; 确定子 模块 1344,连接至发送模块 144, 设置为根据发送模块 144发送的位置更新允许消息, 确定归属用户服务器允许移动性管理单元对用户设备进行寻呼。 需要说明的是, 装置实施例中描述的移动性管理单元对应于上述的方法实施例, 其具体的实现过程在方法实施例中已经进行过详细说明, 在此不再赘述。 综上所述, 根据本发明的上述实施例, 提供了一种重启移动性管理单元的处理方 法及移动性管理单元。 通过本发明, 移动性管理单元通过归属用户服务器获得允许, 然后通过国际移动用户设备识别码对该用户设备进行寻呼, 从而可以实现该用户设备 重新连接到移动性管理单元, 解决了移动性管理单元重启之后不能联系到用户设备的 问题, 保证该用户设备得到下行数据, 进而提高了用户体验。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布在多个计算装置所 组成的网络上, 可选地, 它们可以用计算装置可执行的程序代码来实现, 从而, 可以 将它们存储在存储装置中由计算装置来执行, 或者将它们分别制作成各个集成电路模 块, 或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样, 本发明 不限制于任何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领域的技 术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内, 所作的 任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1. 一种重启移动性管理单元的处理方法, 包括:
在移动性管理单元重启之后, 所述移动性管理单元接收到来自服务网关的 下行数据到达通知消息;
所述移动性管理单元确定所述用户设备所属的归属用户服务器允许所述移 动性管理单元对所述用户设备进行寻呼;
所述移动性管理单元使用所述用户设备的国际移动用户设备识别码对所述 用户设备进行寻呼。
2. 根据权利要求 1所述的方法, 其中, 所述移动性管理单元确定所述用户设备所 属的归属用户服务器允许所述移动性管理单元对所述用户设备进行寻呼包括: 所述移动性管理单元向所述归属用户服务器发送位置更新请求消息, 其中 所述位置更新请求消息携带有用于请求对所述用户设备进行寻呼的故障恢复指 示信息;
所述归属用户服务器判断所述移动性管理单元与自身保存的移动性管理单 元是否一致;
如果判断结果为是, 则所述归属用户服务器向所述移动性管理单元发送位 置更新允许消息;
所述移动性管理单元根据所述位置更新允许消息, 确定所述归属用户服务 器允许所述移动性管理单元对所述用户设备进行寻呼。
3. 根据权利要求 2所述的方法, 其中, 如果判断结果为否, 则所述归属用户服务 器向所述移动性管理单元发送位置更新拒绝消息, 并在所述位置更新拒绝消息 中携带拒绝所述移动性管理单元的原因值。
4. 根据权利要求 3所述的方法, 其中, 在所述归属用户服务器向所述移动性管理 单元发送所述位置更新拒绝消息之后, 所述方法还包括:
所述移动性管理单元向所述服务网关发送下行数据失败指示消息, 其中所 述下行数据失败指示消息用于指示所述服务网关删除所述服务网关与所述分组 数据网络网关之间的承载。
5. 根据权利要求 1至 4中任一项所述的方法, 其中, 在所述服务网关接收来自所 述分组数据网络网关的所述下行数据之前, 所述方法还包括:
所述服务网关检测到所述移动性管理单元重启或者链路不正常; 所述服务网关保留所述服务网关与所述分组数据网络网关之间的承载, 其 中所述承载是在承载建立过程中由所述移动性管理单元或者策略与计费规则功 能实体确定的;
所述服务网关在所述承载上接收所述下行数据。
6. 根据权利要求 1至 4中任一项所述的方法, 其中, 所述下行数据到达通知消息还携带有所述用户位置信息;
所述移动性管理单元使用所述国际移动用户设备识别码和所述用户位置信 息进行寻呼。
7. 根据权利要求 1至 4中任一项所述的方法, 其中, 在所述移动性管理单元确定 所述用户设备所属的归属用户服务器允许所述移动性管理单元对所述用户设备 进行寻呼之后, 所述方法还包括:
所述移动性管理单元接收到来自所述归属用户服务器的用户位置信息; 所述移动性管理单元使用所述国际移动用户设备识别码和所述用户位置信 息进行寻呼。
8. 根据权利要求 1至 4中任一项所述的方法, 其中, 所述移动性管理单元包括以 下之一: 移动性管理实体 MME, 服务通用分组无线业务支持节点 SGSN。
9. 一种移动性管理单元, 包括:
接收模块, 设置为接收来自服务网关的下行数据到达通知消息; 确定模块, 设置为确定所述用户设备所属的归属用户服务器允许所述移动 性管理单元对所述用户设备进行寻呼;
寻呼模块, 设置为使用所述用户设备的国际移动用户设备识别码对所述用 户设备进行寻呼。
10. 根据权利要求 9所述的移动性管理单元, 其中, 所述确定模块包括:
发送子模块, 设置为向所述归属用户服务器发送位置更新请求消息, 其中 所述位置更新请求消息携带有用于请求对所述用户设备进行寻呼的故障恢复指 示信息;
所述归属用户服务器包括:
判断模块, 设置为判断所述移动性管理单元与自身保存的移动性管理单元 是否一致;
发送模块, 设置为在判断结果为是的情况下向所述移动性管理单元发送位 置更新允许消息;
所述确定模块还包括:
确定子模块, 设置为根据所述位置更新允许消息, 确定所述归属用户服务 器允许所述移动性管理单元对所述用户设备进行寻呼。
PCT/CN2011/078426 2010-09-19 2011-08-15 重启移动性管理单元的处理方法及移动性管理单元 WO2012034468A1 (zh)

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