CN102905369A

CN102905369A - UE (user equipment) paging method and system used during MME (mobility management unit) failing or restarting

Info

Publication number: CN102905369A
Application number: CN2011102104764A
Authority: CN
Inventors: 卢飞; 李振东
Original assignee: ZTE Corp
Current assignee: Changshu intellectual property operation center Co.,Ltd.
Priority date: 2011-07-26
Filing date: 2011-07-26
Publication date: 2013-01-30
Anticipated expiration: 2031-07-26
Also published as: CN102905369B

Abstract

The invention discloses a UE (user equipment) paging method used during MME (mobility management unit) failing or restarting. The method comprises the following step that: when an ISR (idle mode signaling reduction) function is activated, and when an MME (mobility management entity) registered by UE (user equipment) is invalid or is restarted, the UE is paged through the MME which is not registered by the UE or the restarted MME. The invention also discloses a UE paging system for achieving the method when the MME is invalid. According to the invention, when the MME or the SGSN (service GPRS support node) is invalid or restarted, the UE also can be paged, and the phenomenon that in the CS service, the UE can not be contacted after the MME is restarted or crashed is prevented. According to the invention, the continuity and stability of the UE service are ensured, and the service quality of the CS service is improved.

Description

Mobile management unit lost efficacy or user equipment calling method and system when restarting

Technical field

The present invention relates to System Architecture Evolution (SAE, System Architecture Evolution) space interface signaling reduces (ISR in, Idle mode Signaling Reduction) subscriber equipment (UE under the function, User Equipment) paging technique relates in particular to that a kind of mobile management unit lost efficacy or user equipment calling method and system when restarting.

Background technology

Along with global microwave access intercommunication (WiMax, World Interoperability for Microwave Access) sudden emergence of technology, 3-G (Generation Three mobile communication system) will keep it in the competitiveness of moving communicating field, just its network performance be must improve, and networking and operation cost reduced.Therefore, third generation partner program (3GPP, 3rd Generation Partnership Project) standardization effort group, just be devoted at present to study packet switched core network (PS Core, Packet Switch Core) and the evolution of global system for mobile communications wireless access network (UTRAN, Universal Mobile Telecommunication System Radio Access Network).This research topic is called System Architecture Evolution (SAE, System Architecture Evolution), purpose is so that the Packet Based Network (EPC of evolution, Evolved Packet Core) can provide higher transmission rate, shorter transmission delay, optimize the UTRAN (E-UTRAN of grouping and support evolution, Evolved UTRAN), the mobile management between the access network of UTRAN, WLAN (wireless local area network) (WLAN, Wireless Local Area Network) and other non-3GPP.

Fig. 1 is the configuration diagram of SAE, as shown in Figure 1, the network element that comprises in the wireless access network of evolution (E-RAN, Evolved Radio Access Network) is enode b (eNodeB, Evolved NodeB), be used to user's access that Radio Resource is provided; Packet Data Network (PDN, Packet Data Network) provides professional network for the user; EPC provides lower transmission delay, and allows more wireless access system access, and it comprises following network element:

Mobile management entity (MME, Mobility Management Entity), be the chain of command functional entity, the server of interim storage user data, be in charge of and store the context (such as UE/ user ID, mobility management states, user security parameters etc.) of subscriber equipment (UE, User Equipment), be the user assignment temporary mark, when UE quarters at this tracing area or this network, be responsible for this user is carried out authentication; Process all non-access layer informations between MME and the UE; Triggering is in the paging of SAE.MME is the mobile management unit of SAE system, at universal mobile telecommunications system (UMTS, Universal Mobile Telecommunications System) in, mobile management unit is service universal grouping wireless service (GPRS, General Packet Radio Service) support node (SGSN, Serving GPRS Support Node).

Gateway (SGW, Serving Gateway) is a user entity, is responsible for the user face data route processing, and termination is in the downlink data of the UE of free time (ECM_IDLE) state.SAE carrying (bearer) context of management and storage UE is such as IP bearer service parameter and network internal routing iinformation etc.SGW is the anchor point of 3GPP internal system user face, and a user can only have a SGW a moment.

Packet data network gateway (PGW, PDN Gateway) is the gateway of being responsible for UE access PDN, and distributing user IP address also is the mobility anchor point of 3GPP and non-3GPP connecting system, and the function of PGW also comprises strategy enforcement, charging support etc.The user can access a plurality of PGW at synchronization.Strategy is implemented functional entity (PCEF, Policy and Charging Enforcement Function) with charging and also is arranged in PGW.

Strategy is responsible for providing policy control and charging regulation to PCEF with charging regulation function entity (PCRF, Policy and Charging Rules Function).

Home subscriber server (HSS, Home Subscriber Server) permanent storage user contracting data, the data of HSS storage comprise the international mobile subscriber identity (IMSI, International Mobile Subscriber Identification) of UE, the IP address of PGW.

Physically, SGW and PGW may unify setting, and EPC system user veil unit comprises SGW and PGW.

In order to support circuit domain business, 3GPP has introduced circuit domain rollback (CSFB in network, Circuit Switched Fallback) mechanism, in CSFB mechanism, MME is by SGs interface and the (MSC of mobile switching centre, Mobile Switched Center) connect, MSC and VLR Visitor Location Register in real network (Visitor Location Register, VLR) are realized unification.When the residing area of coverage of UE changes, for example, from a kind of wireless access technology (RAT, when Radio Access Technology) area of coverage moves to another RAT area of coverage, UE finds to have entered into a unregistered zone by monitoring broadcast channel, in order to guarantee the business continuity between UE and the core net, UE need to register under the new RAT area of coverage, therefore, UE can initiate to access the tracing section updating (TAU of RAT, Tracking Area Update) or Routing Area Update (RAU, Routing Area Update) flow process.Fig. 2 is tracing section updating and activates the flow chart that SGs connects, as shown in Figure 2, show the UE that is registered under the UTRAN area of coverage and move to the E-UTRAN area of coverage, and in the TAU process, activated the flow process of SGs, move to the RAU flow process that causes under the UTRAN area of coverage for the UE that is registered under the E-UTRAN area of coverage, similar with flow process shown in Figure 2, introduce no longer separately.As shown in Figure 2, mainly may further comprise the steps:

Step 201, UE moves to the E-UTRAN area of coverage under the MME, send the tracing section updating request message to MME, request is registered in new zone, carrying SGSN in the update inquiry information is the grouping temporary mobile subscriber identity (P-TMSI, Packet-Temporary Mobile Subscriber Identity) that UE distributes.

Step 202, new MME finds old SGSN according to the P-TMSI sign, sends the context that the context request signaling is obtained UE to old SGSN.

Step 203, old SGSN sends to new MME with user's mobile management and beared information, namely carries out context response.

Step 204 is confirmed context after new MME receives context response.

Step 205, new MME is to SGW starting update load bearing request message, upgrade in the bearing request message and carry source GPRS Tunnel Protocol control plane (GTP-C, GPRS Tunneling Protocol-Control Plane) Tunnel Identifier and purpose GTP-C Tunnel Identifier, SGW is the binding relationship of new bearer more.

Step 206, SGW sends more new bearer request to PGW, and the parameters such as the address information of SGW, tunnel identification information, access technology type are sent to PGW.

Step 207, PGW upgrades the context of self and returns the renewal bearing response message to SGW, and the response message content comprises the address of PGW and Tunnel Identifier etc.

Step 208, SGW returns more the new bearer response to new MME, brings MME with the purpose GTP-C Tunnel Identifier of SGW appointment, self address and the address of PGW and tunnel information etc.

Step 209, new MME is by the change of location update message notice HSS registered location.

Step 210, HSS keeps single registration principle to UE, sends the canceling position signaling to old SGSN, only safeguards the registration of new MME.

Step 211, old SGSN is to HSS home position cancellation response.

Step 212, HSS upgrades the position of new MME and confirms.

Step 213, MME sends the location update request message request to MSC and sets up the SGs connection, carries IMSI in the location update request message, Location Area Identification (LAI, Location Area Identity), MME title, the parameters such as position updating type;

Step 214, MSC carries out user's inspection, and is checking by rear to HSS transmission location update request message;

Step 215, HSS upgrades acknowledge message to the MSC home position;

Step 216, MSC upgrades to the MME home position and accepts message, and the position is upgraded and is accepted to carry in the message Temporary Mobile Subscriber Identity (TMSI, Temporary Mobile Subscriber Identity);

Step 217, effective in current tracking area if new MME confirms UE, then send tracing section updating to UE and accept message, accept to need in the message to carry LAI and TMSI at TAU;

Step 218, if new MME is that UE has distributed a new global unique temporary identity (GUTI, Globally Unique Temporary Identity) by the TAU flow process, UE can the returning tracking district upgrades and finishes message and confirm to MME so.

Upgrade principle based on this position, if UE is frequently mobile between the UTRAN area of coverage or E-UTRAN, the frequent Acceditation Area that perhaps causes owing to reasons such as signal strength signal intensities in the area of coverage is selected all to cause a large amount of TAU or RAU flow process, and this can cause white elephant concerning eating dishes without rice or wine.Therefore, in the EPS system, in order to reduce the space interface signaling between UE and the core net, introduced the function of space interface signaling minimizing (ISR, Idle mode Signaling Reduction).After having activated this function, have simultaneously the UE of UTRAN and E-UTRAN access function, can be registered to simultaneously MME and SGSN.Like this, when UE frequently moved between two kinds of different access technologies, UE just can not initiate to access TAU or the RAU flow process of RAT, thereby had reduced unnecessary space interface signaling transmission.

UE activates the process of ISR and also finishes by TAU or RAU flow process, and is just different on some specific implementation step.Describe take employing TAU flow process activation ISR function as the difference of example to the two, situation is similar therewith for the flow process of employing RAU flow process activation ISR function.Fig. 3 as shown in Figure 3, mainly may further comprise the steps for activate the flow chart that ISR function and SGs connect by the tracing section updating flow process:

Step 301, UE moves to the E-UTRAN area of coverage under the MME, and the P-TMSI that distributes under SGSN except carrying UE in the tracing section updating request message that sends to MME also carries the information whether UE supports the ISR ability.

Step 302, new MME finds old SGSN according to the P-TMSI sign, and carries out the context acquisition process to old SGSN transmission context request signaling.

Step 303, old SGSN sends to new MME with user's mobile management and beared information, and carries the information of self whether supporting the ISR ability in the context response information of returning.

Step 304, new MME judges whether to carry out ISR according to the contextual information that receives from old SGSN and activates, activate if carry out ISR, so new MME carries the ISR indication in the context acknowledgement message of replying to old SGSN, keeps the original contextual information of UE to inform old SGSN.

Step 305, new MME upgrades in the bearing request message and carries source GTP-C Tunnel Identifier and purpose GTP-C Tunnel Identifier to SGW starting update load bearing request message, and SGW is the binding relationship of new bearer more.Upgrade in the bearing request message and also comprise the indication that activates ISR, the bearer context information that notice SGW reservation UE has under old SGSN.

Step 306, because variation has occured RAT, SGW sends to PGW and upgrades bearing request message.

Step 307, PGW upgrades the context of self and returns the renewal bearing response message to SGW.

Step 308, SGW returns the renewal bearing response message to new MME, upgrades purpose GTP-C Tunnel Identifier that bearing response message carries the SGW appointment, self address and the address of PGW and tunnel information etc.

Step 309, new MME is by the change of location update message notice HSS position, and HSS has kept the log-on message in E-UTRAN and these two territories of UTRAN simultaneously, no longer sends canceling position information to old SGSN.

Step 310, HSS upgrades the position of new MME and confirms.

Step 311, MME sends the location update request message request to MSC and sets up the SGs connection, carries IMSI in the location update request message, LAI, MME title, the parameters such as position updating type;

Step 312, MSC carries out user's inspection, and is checking by rear to HSS transmission location update request message;

Step 313, HSS upgrades acknowledge message to the MSC home position;

Step 314, MSC upgrades to the MME home position and accepts message, and the position is upgraded and is accepted to carry in the message TMSI;

Step 315, effective in current tracking area if new MME confirms UE, then send tracing section updating to UE and accept message; MME accepts message informing UE ISR function by this tracing section updating and activates, and tracing section updating carries LAI and TMSI in accepting to disappear.

Step 316, if new MME is that UE has distributed a new GUTI sign by the TAU flow process, UE can the returning tracking district upgrades and finishes message and confirm to MME so.

When ISR activated, MSC can only set up SGs with MME and be connected, was connected and can not set up SGs with SGSN simultaneously, namely worked as MSC and had set up SGs with SGSN and be connected, and can not set up ISR between MME and the SGSN so related.Fig. 4 be ISR when activating UE be in the paging flow chart of Idle state, as shown in Figure 4, when ISR activates and user when being in Idle state, when MSC received descending paging service, processing procedure may further comprise the steps:

Step 401, when MSC received callee function, MSC sent paging request message to MME, carried user IMSI in the paging request message, TMSI, positional information;

Step 402, MME sends paging request message to eNodeB, carries the indication of CS territory in the paging request message;

Step 403, eNodeB transmits paging request message to UE, carries the indication of CS territory in the paging request message;

Step 404, MME transmits the CS paging indicating message to SGSN;

Step 405, SGSN sends paging request message to RNC, carries the indication of CS territory in the paging request message;

Step 406, RNC sends paging request message to UE, carries the indication of CS territory in the paging request message.

After UE receives paging, will return page response.

In real network, MME or SGSN may be because certain reason break down and cause restarting or delaying machine.When mobile management unit is restarted or delayed machine, can not relate to UE, thereby cause this UE can't receive paging service.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of mobile management unit to lose efficacy or user equipment calling method and system when restarting, and can when MME or SGSN lost efficacy or restart, also can realize smoothly the paging to UE.

For achieving the above object, technical scheme of the present invention is achieved in that

A kind of mobile management unit lost efficacy or user equipment calling method when restarting, and comprising:

During the ISR function activation, when the mobile management unit of determining the UE registration lost efficacy or restarted, by the unregistered mobile management unit of described UE or the mobile management unit after restarting realize paging to described UE.

Preferably, described mobile management unit is MME and/or SGSN.

Preferably, the mobile management unit of described UE registration lost efficacy or restart for:

One of the MME of described UE registration and SGSN lost efficacy or restarted.

Preferably, the MME of UE registration lost efficacy or when restarting, and described the realization the paging of described UE by the unregistered mobile management unit of described UE or the mobile management unit of restarting is:

When MSC receives for the callee function of described UE, select other MME that do not lose efficacy or the MME of restarting to send paging request message; Selected MME triggers the SGSN that is in the described UE registration among the ISR and carries out paging.

Preferably, the selected MME SGSN that triggers the described UE registration among the described ISR carries out paging and is:

Selected MME sends location update message to home subscriber server HSS; Carry in the described location update message and recover indication;

Described HSS returns described SGSN address information to selected MME;

Selected MME is to described SGSN transtation mission circuit territory CS paging indicating message;

Described SGSN receives the grouping temporary mobile subscriber identity P-TMSI of the described UE of inquiry behind the CS paging indicating message, and described UE is carried out paging.

Preferably, described method also comprises:

Described SGSN adopts the heavy assigning process of P-TMSI to make UE re-start Routing Area Update;

Perhaps, described UE re-starts and adheres to according to the international mobile subscriber identity IMSI paging of obtaining; Wherein, carry the IMSI of described UE in the described CS paging indicating message.

Preferably, the SGSN of UE registration lost efficacy or when restarting, and described the realization the paging of described UE by the unregistered mobile management unit of described UE or the mobile management unit of restarting is:

The MME that is in the described UE registration among the ISR selects other SGSN that do not lose efficacy or the SGSN of restarting, and triggers selected SGSN described UE is carried out paging after receiving the paging request message that described MSC sends.

Preferably, the selected SGSN of described triggering carries out paging to described UE and is:

The MME that is in the described UE registration among the ISR sends the CS paging indicating message to selected SGSN; Wherein, carry described UE in the described CS paging indicating message in the MME of described UE registration or the positional information among the MSC;

After described SGSN receives the CS paging indicating message, directly described UE is carried out paging, or according to the zone that the positional information of described UE is determined described UE is carried out paging.

Preferably, described method also comprises:

Described MME adopts global unique temporary identity GUTI heavily to distribute and makes again initiating updating of tracking area TAU process of UE;

A kind of mobile management unit lost efficacy or paging user equipment system when restarting, and comprised mobile management unit, and described mobile management unit comprises MME and/or SGSN, and described system supports the ISR function; Wherein,

Be used for when the ISR function activation, the mobile management unit of determining the UE registration lost efficacy or when restarting, and realized paging to described UE by the unregistered mobile management unit of described UE or the mobile management unit of restarting.

Preferably, the mobile management unit of described UE registration lost efficacy or restart for: one of the MME of described UE registration and SGSN lost efficacy or restarted.

Preferably, described system also comprises MSC;

Described MSC was used for when the MME of UE registration lost efficacy or restarted, and when receiving the callee function for described UE, selected other MME that do not lose efficacy or the MME of restarting to send paging request message;

Selected MME is further used for, and triggers the SGSN that is in the described UE registration among the ISR and carries out paging.

Preferably, described system also comprises HSS;

Selected MME is further used for, and sends location update message to HSS; Carry in the described location update message and recover indication; And, to described SGSN transtation mission circuit territory CS paging indicating message;

Described HSS is further used for, and returns described SGSN address information to selected MME;

Described SGSN is further used for, and the P-TMSI of the described UE of inquiry carries out paging to described UE after receiving the CS paging indicating message.

Preferably, described SGSN is further used for, and adopts the heavy assigning process of P-TMSI to make UE re-start Routing Area Update.

Preferably, be in the MME of the described UE registration among the ISR, be used for when the SGSN of UE registration lost efficacy or restarted, receive the paging request message that described MSC sends after, select other SGSN that do not lose efficacy or the SGSN of restarting, and trigger selected SGSN described UE is carried out paging.

Preferably, the MME that is in the described UE registration among the ISR is further used for, and sends the CS paging indicating message to selected SGSN; Wherein, carry described UE in the described CS paging indicating message in the MME of described UE registration or the positional information among the MSC;

Described SGSN is further used for, and after receiving the CS paging indicating message, directly described UE is carried out paging, or according to the zone that the positional information of described UE is determined described UE is carried out paging.

Preferably, described MME is further used for, and adopts GUTI heavily to distribute and makes UE again initiate the TAU process.

Preferably, described UE re-starts and adheres to according to the IMSI paging of obtaining; Wherein, carry the IMSI of described UE in the described CS paging indicating message.

Among the present invention, MME under the ISR function or SGSN lost efficacy or when restarting, system will redefine other the SGSN or the MME that did not lose efficacy, or redefine this SGSN of restarting or MME and initiate paging to UE, guarantee when MME or SGSN lost efficacy or restarted, also to realize the paging to UE, avoided mobility management unit in the CS business restart or the machine of delaying after can not relate to the phenomenon of UE.The present invention has guaranteed the stability of UE business, has improved the service quality of CS business.

Description of drawings

Fig. 1 is the configuration diagram of SAE;

Fig. 2 is tracing section updating and activates the flow chart that SGs connects;

Fig. 3 is for activating the flow chart that ISR function and SGs connect by the tracing section updating flow process;

UE was in the paging flow chart of Idle state when Fig. 4 was the ISR activation;

Fig. 5 be the ISR of the embodiment of the invention when activating MME lost efficacy or when restarting to the paging method flow chart of UE;

Fig. 6 be the ISR of the embodiment of the invention when activating SGSN lost efficacy or when restarting to the paging method flow chart of UE;

Fig. 7 is that the mobile management unit of the embodiment of the invention one lost efficacy or the flow chart of user equipment calling method when restarting;

Fig. 8 is that the mobile management unit of the embodiment of the invention two lost efficacy or the flow chart of user equipment calling method when restarting;

Fig. 9 is that the mobile management unit of the embodiment of the invention three lost efficacy or the flow chart of user equipment calling method when restarting;

Figure 10 is that the mobile management unit of the embodiment of the invention four lost efficacy or the flow chart of user equipment calling method when restarting.

Embodiment

Basic thought of the present invention is: the MME under the ISR function or SGSN lost efficacy or when restarting, system will redefine other the SGSN or the MME that did not lose efficacy, or redefine this SGSN of restarting or MME and initiate paging to UE, guarantee when MME or SGSN lost efficacy or restarted, also to realize the paging to UE.

For making the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.

Fig. 5 be the ISR of the embodiment of the invention when activating MME lost efficacy or when restarting to the paging method flow chart of UE, as shown in Figure 5, for avoiding occurring when ISR activates in the CS business, MME restart or cisco unity malfunction after can not relate to the phenomenon of UE, MME of the present invention lost efficacy or when restarting the paging method to UE mainly may further comprise the steps:

Step 501, MSC detects that MME is restarted or during cisco unity malfunction, the MME that can reselect a MME or recover; MSC sends paging request message to the MME that selects, and carries IMSI in the message,

Step 502, MME carries out the IMSI paging;

Step 503, because UE might be simultaneously in MME, SGSN registration, so MME sends location update request message to HSS, and carries in this location update request message and recover indication, is used to indicate the address that HSS returns SGSN;

Step 504, MME sends the CS paging indicating message according to the SGSN address that HSS returns to SGSN, carries the IMSI of UE in this CS paging indicating message, and SGSN can carry out the P-TMSI inquiry and carry out the P-TMSI paging according to the IMSI of UE;

Step 505 after UE receives the P-TMSI paging, is carried out the service request process, and SGSN also can adopt the heavy assigning process of P-TMSI and make UE re-start the RAU process, and in the RAU process, SGSN can notify UE to discharge ISR; If UE receives the IMSI paging of MME, UE will re-start attaching process.

Fig. 6 be the ISR of the embodiment of the invention when activating SGSN lost efficacy or when restarting to the paging method flow chart of UE, as shown in Figure 6, when ISR of the present invention activates MME lost efficacy or when restarting the paging method to UE mainly may further comprise the steps:

Step 601, when ISR activated, MME received the paging request message that MSC sends;

Step 602, MME temporary mobile subscriber identity (S-TMSI, the Service-Temporary Mobile Subscriber Identity) paging of in TAI list, dividing into groups;

Step 603, MME selects a normal SGSN (other SGSN or the SGSN that has recovered), sends the CS paging indicating message, carries the IMSI of UE in the message, and can carry the positional information of UE in MME or MSC; Which zone is the positional information that SGSN provides at MME or MSC according to UE decide in is carried out the IMSI paging to UE;

Step 604, after UE receives the S-TMSI paging, the initiating business request process, MME can initiate the heavy assigning process triggering of GUTI UE and again initiate the TAU process, and in the TAU process, MME can notify UE to discharge ISR; If UE has received the IMSI paging of SGSN, UE will adhere to again.

Embodiment one

The application scenarios of the embodiment of the invention one is: UE is in idle condition under MME and SGSN, and MME breaks down and restarts or cisco unity malfunction, and UE receives the IMSI paging.Fig. 7 is that the mobile management unit of the embodiment of the invention one lost efficacy or the flow chart of user equipment calling method when restarting, as shown in Figure 7, this example mobile management unit lost efficacy or when restarting user equipment calling method mainly may further comprise the steps:

Step 701, MME restart or cisco unity malfunction after, MSC receives callee function, MSC reselects a MME or the MME that has recovered and sends the CS beep-page message from fault, carry the IMSI of UE in the message;

Step 702, after MME received the CS beep-page message, because MME is without the relevant information of UE, so MME used IMSI to carry out paging, and MME sends the IMSI beep-page message to eNodeB;

Step 703, eNodeB sends the IMSI beep-page message to UE;

Step 704, MME sends location update request message to HSS, carries IMSI in the message, and carries and recover indication, is used to indicate the address that HSS returns SGSN;

Step 705, HSS upgrades response message, the address of carrying SGSN in the message to the MME home position;

Step 706, after MME obtained the SGSN address, MME sent the CS paging indicating message to SGSN, carries IMSI in the message;

Step 707, SGSN searches the P-TMSI of UE according to IMSI, and sends beep-page message to RNC; If there is not the UE relevant information among the SGSN, SGSN will send the IMSI beep-page message to RNC;

Step 708, RNC transmits beep-page message to UE;

Step 709, after UE received the IMSI beep-page message of eNodeB or RNC, UE discharged the information of self, and again is attached in the network.

Embodiment two

The application scenarios of the embodiment of the invention two is: UE is in idle condition under MME and SGSN, and MME breaks down and restarts or cisco unity malfunction, and UE receives the P-TMSI paging.Fig. 8 is that the mobile management unit of the embodiment of the invention two lost efficacy or the flow chart of user equipment calling method when restarting, as shown in Figure 8, this example mobile management unit lost efficacy or when restarting user equipment calling method mainly may further comprise the steps:

Step 801, MME restart or cisco unity malfunction after, MSC receives callee function, MSC reselects a MME or the MME that has recovered and sends the CS beep-page message from fault, carry the IMSI of UE in the message;

Step 802, after MME received the CS beep-page message, because MME is without the relevant information of UE, so MME used IMSI to carry out paging, and MME sends the IMSI beep-page message to eNodeB;

Step 803, eNodeB sends the IMSI beep-page message to UE;

Step 804, MME sends location update request message to HSS, carries IMSI in the message, and carries and recover indication, is used to indicate the address that HSS returns SGSN;

Step 805, HSS upgrades response message, the address of carrying SGSN in the message to the MME home position;

Step 806, after MME obtained the SGSN address, MME sent the CS paging indicating message to SGSN, carries IMSI in the message;

Step 807, SGSN searches the P-TMSI of UE according to IMSI, and sends beep-page message to RNC;

Step 808, RNC sends beep-page message to UE;

Step 809, after UE receives the P-TMSI beep-page message, UE initiating business request process;

Step 810, RNC is to SGSN forwarding service request message;

Step 811, after SGSN received business request information, SGSN sent the heavy assignment messages of P-TMSI to RNC, carries P-TMSI and new RAI in the message;

Step 812, RNC transmits the heavy assignment messages of P-TMSI to UE;

Step 813, after UE received new RAI, UE sent the RAU request message to RNC;

Step 814, RNC transmits the RAU request message to SGSN;

Step 815, SGSN returns RAU to RNC and accepts message, and RAU accepts not carry in the message ISR and activates indication, can be used for like this discharging the ISR of UE;

Step 816; RNC transmits RAU to UE and accepts message, and RAU accepts not carry in the message ISR and activates indication, and UE can discharge ISR like this.

Omitted in this example with technical solution of the present invention and realized irrelevant MME/SGSN and SGW, the Signalling exchange between the PGW.

Embodiment three

The application scenarios of the embodiment of the invention three is: UE is in idle condition under MME and SGSN, and SGSN breaks down and restarts or cisco unity malfunction, and UE receives the S-TMSI paging.Fig. 9 is that the mobile management unit of the embodiment of the invention three lost efficacy or the flow chart of user equipment calling method when restarting, as shown in Figure 9, this example mobile management unit lost efficacy or when restarting user equipment calling method mainly may further comprise the steps:

Step 901, after MSC received callee function, MSC sent the CS beep-page message to MME, carries IMSI in the message, TMSI, positional information;

Step 902, MME sends the S-TMSI paging to eNodeB;

Step 903, eNodeB transmits the S-TMSI paging to UE;

Step 904, MME reselects a normal SGSN, this SGSN can be other normal SGSN or the SGSN of having restarted recovery, MME sends the CS paging indicating message to the SGSN that selects, carry the IMSI of UE in the message, the positional information of UE in MME or the positional information in MSC;

Step 905, SGSN determines the IMSI paging range according to obtaining positional information in the step 904, then SGSN sends the IMSI paging in the IMSI paging range;

Step 906, RNC transmits the IMSI paging;

Step 907, after UE receives the S-TMSI paging of MME transmission, UE initiating business request process;

Step 908, eNodeB sends service request to MME;

Step 909, MME sends initial context to eNodeB and sets up request message, carries user's face address and the TEID of SGW in the message, and EPS carries QoS;

Step 910, eNodeB sends radio bearer to UE and sets up request message;

Step 911, UE returns radio bearer to eNodeB and sets up response message;

Step 912, eNodeB returns initial context foundation to MME and finishes message, carries user's face address and the TEID of eNodeB in the message;

Step 913, MME initiates the heavy assignment messages of GUTI to eNode B, carries GUTI and new TAI list in the message;

Step 914, eNodeB sends the heavy assignment messages of GUTI to UE;

Step 915, after UE receives new TAI list, UE will initiate the TAU process;

Step 916, eNodeB transmits the TAU request message to MME;

Step 917, MME sends TAU to eNodeB and accepts message, and RAU accepts not carry in the message ISR and activates indication, can be used for like this discharging the ISR of UE;

Step 918; ENodeB transmits TAU to UE and accepts message, and TAU accepts not carry in the message ISR and activates indication, and UE can discharge ISR like this.

Embodiment four

The application scenarios of the embodiment of the invention four is: UE is in idle condition under MME and SGSN, and SGSN breaks down and restarts or cisco unity malfunction, and UE receives the IMSI paging that SGSN sends.Figure 10 is that the mobile management unit of the embodiment of the invention four lost efficacy or the flow chart of user equipment calling method when restarting, as shown in figure 10, this example mobile management unit lost efficacy or when restarting user equipment calling method mainly may further comprise the steps:

Step 1001, after MSC received callee function, MSC sent the CS beep-page message to MME, carries IMSI in the message, TMSI, positional information;

Step 1002, MME sends the S-TMSI paging to eNodeB;

Step 1003, eNodeB transmits the S-TMSI paging to UE;

Step 1004, MME reselects a normal SGSN, and this SGSN can be other SGSN or the SGSN of having restarted recovery, and MME sends the CS paging indicating message to the SGSN that selects, carry the IMSI of UE in the message, the positional information of UE in MME or the positional information in MSC;

Step 1005, SGSN determines the IMSI paging range according to obtaining positional information in the step 1004, then SGSN sends the IMSI paging in the IMSI paging range;

Step 1006, RNC transmits the IMSI paging;

Step 1007, after UE receives the IMSI paging, UE will initiate attaching process again.

The present invention has put down in writing also that a kind of mobile management unit lost efficacy or paging user equipment system when restarting, and comprises mobile management unit, and described mobile management unit comprises MME and/or SGSN, and described system supports the ISR function;

When the ISR function activation, the mobile management unit of determining UE registration lost efficacy or when restarting, and realized paging to described UE by the unregistered mobile management unit of described UE or the mobile management unit of restarting.

It will be appreciated by those skilled in the art that the present invention there is no change to existing network architecture, therefore, related network elements and structure thereof can be understood referring to aforementioned system architecture shown in Figure 1.Below, emphasis has been made the new function that improved network element realizes to its function and has been described.

The mobile management unit of above-mentioned UE registration lost efficacy and is: one of the MME of described UE registration and SGSN lost efficacy.Among the present invention, so-called inefficacy refers to that mainly mobile management unit is unavailable, as is in fault or goes offline, or shutdown and the down state such as resetting.

The mobile management unit of above-mentioned UE registration lost efficacy or restart for: one of the MME of described UE registration and SGSN lost efficacy or restarted.

Paging user equipment system when mobile management unit of the present invention lost efficacy also comprises MSC;

Paging user equipment system when mobile management unit of the present invention lost efficacy also comprises HSS;

Described SGSN is further used for, and adopts the heavy assigning process of P-TMSI to make UE re-start Routing Area Update.

Be in the MME of the described UE registration among the ISR, be used for when the SGSN of UE registration lost efficacy or restarted, after receiving the paging request message of described MSC transmission, select other SGSN that do not lose efficacy or the SGSN of restarting, and trigger selected SGSN described UE is carried out paging.

The MME that is in the described UE registration among the ISR is further used for, and sends the CS paging indicating message to selected SGSN; Wherein, carry described UE in the described CS paging indicating message in the MME of described UE registration or the positional information among the MSC;

Described MME is further used for, and adopts GUTI heavily to distribute and makes UE again initiate the TAU process.

Described UE re-starts and adheres to according to the IMSI paging of obtaining; Wherein, carry the IMSI of described UE in the described CS paging indicating message.

The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.

Claims

1. a mobile management unit lost efficacy or user equipment calling method when restarting, and it is characterized in that, described method comprises:

When space interface signaling reduces the ISR function activation, when the mobile management unit of determining the user equipment (UE) registration lost efficacy or restarted, by the unregistered mobile management unit of described UE or the mobile management unit after restarting realize paging to described UE.

2. method according to claim 1 is characterized in that, described mobile management unit is mobile management entity MME and/or service universal grouping wireless Serving GPRS Support Node SGSN.

3. method according to claim 2 is characterized in that, the mobile management unit of described UE registration lost efficacy or restart for:

4. method according to claim 3 is characterized in that, the MME of UE registration lost efficacy or when restarting, and described the realization the paging of described UE by the unregistered mobile management unit of described UE or the mobile management unit of restarting is:

When moving exchanging center MSC receives for the callee function of described UE, select other MME that do not lose efficacy or the MME of restarting to send paging request message; Selected MME triggers the SGSN that is in the described UE registration among the ISR and carries out paging.

5. method according to claim 4 is characterized in that, the SGSN that selected MME triggers the described UE registration among the described ISR carries out paging and is:

Described HSS returns described SGSN address information to selected MME;

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

7. method according to claim 3 is characterized in that, the SGSN of UE registration lost efficacy or when restarting, and described the realization the paging of described UE by the unregistered mobile management unit of described UE or the mobile management unit of restarting is:

8. method according to claim 7 is characterized in that, the selected SGSN of described triggering carries out paging to described UE and is:

9. method according to claim 8 is characterized in that, described method also comprises:

10. a mobile management unit lost efficacy or paging user equipment system when restarting, and comprised mobile management unit, and described mobile management unit comprises MME and/or SGSN, and described system supports the ISR function; It is characterized in that,

11. system according to claim 10 is characterized in that, the mobile management unit of described UE registration lost efficacy or restart for: one of the MME of described UE registration and SGSN lost efficacy or restarted.

12. system according to claim 11 is characterized in that, described system also comprises MSC;

13. system according to claim 12 is characterized in that, described system also comprises HSS;

14. system according to claim 13 is characterized in that,

15. system according to claim 11 is characterized in that,

16. system according to claim 15 is characterized in that,

17. system according to claim 16 is characterized in that,

18. to 17 each described systems, it is characterized in that according to claim 10, described UE re-starts and adheres to according to the IMSI paging of obtaining; Wherein, carry the IMSI of described UE in the described CS paging indicating message.