CN101083830A - Method for transferring users among different core network equipments - Google Patents
Method for transferring users among different core network equipments Download PDFInfo
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- CN101083830A CN101083830A CNA2006100610031A CN200610061003A CN101083830A CN 101083830 A CN101083830 A CN 101083830A CN A2006100610031 A CNA2006100610031 A CN A2006100610031A CN 200610061003 A CN200610061003 A CN 200610061003A CN 101083830 A CN101083830 A CN 101083830A
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Abstract
The present invention discloses a method of transferring users between different core-network equipments, and includes: a serving core network equipment transfers the attachment request from user equipment or the updating request from tracking area to an aim core-network equipment; the aim core-network equipment establishes a signaling connection with the corresponding wireless access network; the aim core-network equipment is in charge of solving the attachment request from user equipment or the updating request from tracking area. By introducing the present invention, user equipments can be transferred to aim core-network equipment through the only process of user equipment attachment or tracking area update. The process is simple, effective and rapid.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of between different core network equipment the method for transferring user.
Background technology
(Universal Mobile Telecommunications System UMTS) is a kind of third generation cordless communication network of 3GPP tissue definition to universal mobile telecommunications system.The UMTS network is made up of core net, wireless access network and subscriber equipment.Core net comprises circuit domain and packet domain, and circuit domain provides based on Circuit-switched business (for example speech business), and packet domain provides the business based on packet switching (for example Internet visit).Wireless access network provides wireless air interface, and subscriber equipment is the terminal equipment that the user uses.
Referring to Fig. 1, be UMTS schematic network structure of the prior art.Because the present invention only relates to the packet domain of core net, so the circuit domain of core net part is omitted in Fig. 1.Packet domain core network is by Serving GPRS Support Node (Serving GPRS Support Node, SGSN), Gateway GPRS Support Node (Gateway GPRS Support, GGSN) and attaching position register (Home Location Register HRL) forms; (Radio Network Controller RNC) forms with cell base station NodeB wireless access network by radio network controller.Each RNC can connect several NodeB, and each SGSN can connect several RNC.Being Iub interface between NodeB and the RNC, is the Iu interface between RNC and the SGSN, is Gn or gp interface between SGSN and the GGSN, GGSN and packet data network (Packet DataNetwork, PDN) being the Gi interface between, is Gr interface between SGSN and the HLR, is the Gc interface between GGSN and the HLR.PDN is the general name of outer all packet data network of UMTS network, and it can be Internet network or enterprise network etc.The wireless access network of forming by RNC and NodeB in the UMTS network, be called as the UMTS Terrestrial radio access network network (UMTS Terrestrial Radio AccessNetwork, UTRAN).Wherein, the Iu interface is the key interface of wireless access network and core net, and the management of Radio Resource and control are isolated in the Access Network by the Iu interface, makes core net that professional providing only is provided.Usually, the 3GPP network is divided into two-layer, Access Network is Access Layer (AS, Access Stratum), core net is Non-Access Stratum (NAS, Non Access Stratum), UE and Access Network interactive signaling message are referred to as AS message, UE and core net interactive signaling message are referred to as NAS message, NAS message comprises the signaling message relevant with mobile management, with session management relevant signaling message, the NAS message in the GPRS network also comprises the signaling message relevant with short message service.Need to carry out Signalling exchange with SGSN in the communication activity such as the UE start is adhered to, Routing Area Update, service request, response paging, these signaling messages are NAS message, for example adhere to request, Routing Area Update request, etc.NAS message aloft is carried in the AS message and transmits as Non-Access Stratum protocol Data Unit (NAS-PDU, Protocol Data Unit) in the interface.When RNC received article one NAS message (promptly receiving first NAS-PDU in AS message), RNC need send to SGSN with NAS message.RNC sets up Iu with SGSN and is connected when transmission article one NAS message is to SGSN.After Iu connect to set up, the mutual NAS message of all signaling messages relevant with this communication activity and UE and SGSN was all used this Iu to be connected and is transmitted.
Current, 3GPP organizes and studies the UMTS network next generation network of evolution (being also referred to as evolvement network) backward, and formulates the technical standard of evolvement network.Evolvement network has a lot of new characteristics, and for example: the packet-type business only is provided, and real time business such as voice, visual telephone also will provide in the mode of grouping; Realize complete IP network, each node device interconnects by IP network in the network, and each portable terminal adheres to distributing IP address, back; The topological structure of evolvement network can improve the reliability of network.
Referring to Fig. 2, be the chief component schematic diagram of evolvement network in the prior art.Evolvement network is made up of three parts: and evolution wireless access network E-RAN (Evolved Radio Access Network), evolution block core net (Evolved Packet Core, EPC) and user equipment (UE) (User Equipment).Three logical functional entities are arranged among the EPC: Mobility Management Entity (Mobility Management Entity, MME), user entity (User Plane Entity, anchor point UPE) and between connecting system (Inter AS Anchor, IASA).MME is used to realize mobile management, UPE is used to realize the processing of packet sessions management and user plane packets data, IASA is used to realize the access of evolvement network and external packet data network PDN, and switching and roaming function between evolvement network and other the non-3GPP networks (as WLAN (wireless local area network) WLAN).E-RAN mainly provides wireless air interface (for example wireless channel), and the relevant function (for example power control, RRM) of Radio Resource.Be the S1 interface between E-RAN and the EPC, the interface between EPC and the external packet data network PDN is the Gi interface.
How three logical functional entity MME, UPE are deployed in different physical equipments with IASA, and the 3GPP tissue does not determine that at present four kinds of possible modes are arranged:
Three logical functional entities of mode one: MME/UPE/IASA are positioned at same physical equipment;
Mode two: MME/UPE is incorporated in a physical equipment, and IASA is positioned at another physical equipment;
Mode three: UPE and IASA are incorporated in a physical equipment, and MME is positioned at another physical equipment;
Three entities of mode four: MME/UPE/IASA are separated from each other;
The present invention is applicable to above four kinds of modes, and in order more clearly to describe technical characterictic of the present invention, the present invention is an example in mode two, and promptly as shown in Figure 2, MME/UPE is incorporated in a physical equipment, and IASA is positioned at another physical equipment.
Referring to Fig. 3, be the MME/UPE pond networking structure of evolvement network in the prior art.In the evolvement network networking structure, equipment rooms such as E-RAN, MME/UPE and Inter AS Anchor adopt the interconnection of IP transmission network, are the interconnected relationship of multi-to-multi between E-RAN and the MME/UPE, i.e. an E-RAN and several MME/UPE interconnection.Some MME/UPE equipment are formed a MME/UPE pond, form pool area (Pool Area) with the area of coverage of the E-RAN of all MME/UPE interconnection in the MME/UPE pond.Adopt the IP network interconnection between E-RAN and the MME/UPE, arbitrarily E-RAN and MME/UPE interconnection arbitrarily.In addition, different pool areas can be overlapping, promptly E-RAN can be simultaneously with different MME/UPE pond in the MME/UPE interconnection.Also be to adopt the IP network interconnection between Inter AS Anchor and the MME/UPE, only mark out the networking structure of an Inter AS Anchor among Fig. 3.
MS is in a pool area, provide access service by identical MME/UPE for it, be that MS moves in same pool area, even the E-RAN that inserts changes, but for the MME/UPE of its service (being called " serving MME/UPE ") remains unchanged (in particular cases, for example when MME/UPE transships, part MS will be transferred to the lower MME/UPE of other loads, and provide service by new MME/UPE for UE).MS during the original execution network attachment, is that MS selects serving MME/UPE by E-RAN in pool area.E-RAN can select the serving MME/UPE of MME/UPE as MS according to static configuration data or poll or load information.
In evolvement network, must search for and select network earlier and carry out network attachment after the MS start, the business that MS could use evolvement network to provide successfully is provided after the evolvement network.Network attachment is exactly the process that MS is registered to EPC.In the network attachment process, evolvement network carries out authentication to MS, distributes temporary mark and IP address, creates communication context information, sets up default IP carrying for MS then.Default IP carrying is mainly used in the IP of " always online " is provided Packet Service, and transmission is to the user data of the business game and the no specific (special) requirements of chargeing, for example business that need not charge, IMS register command data etc.
Referring to Fig. 4, be the network attachment schematic flow sheet of evolvement network in the prior art, the step that MS carries out network attachment comprises:
1, start back MS search network.If find plurality of network (for example: UMTS network, evolvement network), MS need select suitable network.At this, MS has selected evolvement network (having exceeded the scope of the invention about how selecting network, this ominous stating);
2, MS sends Attach Request message to MME/UPE, carries the MS sign in the message
The request of adhering to that MS sends is at first received by E-RAN, and selects a suitable MME/UPE by it for MS, and Attach Request message is routed to this MME/UPE (how selecting MME/UPE to exceed the scope of the invention about E-RAN, this ominous stating);
3, (Home Subscriber Server HSS) carries out authentication (exceeded the scope of the invention about authentication process, do not described in detail at this) with MME/UPE to MS to home subscriber servers;
4, after the authentication success, MME/UPE sends login request message to HSS, carries MS sign and service MME/UPE sign in the message at least;
5, the information in the HSS storage login request message is as MS sign and service MME/UPE sign;
6, HSS replys a registration confirmation message to serving MME/UPE, carries the subscription data of user in HSS in message;
7, be accomplished to the registration of HSS after, MME/UPE is that MS distributes temporary mark and IP address (the IP address also can be distributed by Inter AS Anchor), creates communication context information, sets up a default IP carry between MME/UPE and Inter AS Anchor, sets up default IP carry needed RAB (Radio Access Bearer between Evolved-RAN and MME/UPE for MS, RAB), between Evolved-RAN and MS, set up default IP carry needed radio bearer (Radio Bearer, RB).MS can use this default IP to be connected transmission IP grouped data with IASA, and these IP grouped datas may be the grouping busihess datas of application layer, also may be the signaling datas of application layer, for example the SIP signaling of IMS;
8, MME/UPE replys one to MS and adheres to and accept message, carries temporary mark and the IP address of MS in the message at least;
9, parameters such as the temporary mark accepting to carry in the message, IP address are adhered in MS storage.Carry new temporary mark or IP address in the acknowledge message if adhere to, MS replys one to MME/UPE and adheres to acknowledge message after storage, indicates new temporary mark or IP address to be used.So far, MS successfully has been registered to evolvement network, has obtained temporary mark and IP address;
10, after network attachment, if MS have IP Multimedia System (IP Multimedia System, IMS) ability and user need use the IMS business, MS will carry out IMS registration.In the IMS registration process, the default IP that all IMS signaling messages are set up by step 6 connects and transmits.(having exceeded the scope of the invention about the IMS registration process) this ominous stating;
11, MS carries out after network attachment and the IMS registration, if free of data transmission default IP connections in, default IP is connected the interior resource of E-RAN and is connected with data and is released, but the default IP between MME/UPE and the IASA carries and is retained.After the release, the communication context information of MS in E-RAN is deleted, all resources (comprising radio channel resource and transmission bearer resource) are released, and MS is in the LTE-Idle idle condition, but the IP address of MS remains unchanged;
In the evolvement network, MS has two states: Idle state LTE-Idle and activated state LTE-Active.MS finishes network registry afterwards if there is not transfer of data, then is discharged into the LTE-Idle attitude by the LTE-Active attitude.Under the LTE-Idle attitude, only MME/UPE has the contextual information of MS, and MME/UPE keeps IP address allocated and default IP carrying, does not have data link between MME/UPE and the UE.If when needing to transmit data or carrying out other signaling activities (for example position renewal activity) between MS and the network, MS is moved to the LTE-Active attitude again.Under the LTE-Active attitude, E-RAN has the contextual information of MS, and MS is assigned radio channel resource, transmitting grouped data and signaling message at any time between MS and the network.
In the evolvement network, network coverage area is divided into different tracking area TA (Tracking Area), each tracking area has a unique tracking area identification TAI (Tracking Area Identity).When MS when a TA moves to another TA, MS carries out tracing section updating TAU (Tracking Area Update), purpose is to upgrade the TAI of current MS place tracking area in MME/UPE.In addition, MS also can periodically carry out tracing section updating, and specified by network the cycle time of renewal, usually the cycle be 40 minutes to several hrs.
In the TS23.236 technical standard that 3GPP formulates, provide a kind of method that between different SGSN, shifts UE.
Several SGSN form a SGSN pond, and each SGSN is assigned 1 or plurality of network resource identification NRI (Network Resource Identity), and the scope that RNC covered that all and these SGSN interconnect is " pool area (Pool Area) ".When UE carries out network attachment for the first time in pool area, select a SGSN to provide service for UE in the SGSN pond by RNC, UE is attached to this SGSN (i.e. " service SGSN ").After UE successfully adhered to, service SGSN was that UE distributes temporary mark P-TMSI, points out to serve the NRI of SGSN in P-TMSI, and service SGSN also provide a cycle time (Period Time) that is used for the control cycle Routing Area Update for UE.In pool area, when UE carries out network, Routing Area Update at every turn or initiates service call, point out to serve the NRI of SGSN in sending to the message of RNC, RNC selects the service SGSN of UE according to NRI, therefore UE provides service by same SGSN for UE in pool area.But when SGSN overload or when carrying out attended operation (for example SGSN equipment is restarted), the user among the SGSN need partly or entirely transfer among other SGSN in the SGSN pond.The method that shifts is as follows:
1, when UE carries out network attachment or Routing Area Update, service SGSN judges whether to need to shift UE, if need to shift, service SGSN is that UE distributes a P-TMSI, carries a special Null NRI among this P-TMSI.Simultaneously, service SGSN provides the very short cycle time (Period Time) of time, about 4 seconds for UE.Service SGSN accepts the request of adhering to of UE, and points out to carry in issuing the message of UE P-TMSI and the very short cycle time of time of Null NRI.
2, UE is according to new start-up period routing update cycle time timer, and very the fast timing device is overtime, and UE uses new P-TMSI to initiate Routing Area Update.RNC finds that the NRI that UE provides is that (annotate: the Null NRI that disposes SGSN among the RNC), RNC selects service SGSN for UE and the Routing Area Update request message is routed among the new SGSN special Null NRI again.UE carries out normal Routing Area Update process, and is attached among the new SGSN.So far, the user transfers to another SGSN from a SGSN, and will provide service by new SGSN for UE always, and this SGSN is new service SGSN.New service SGSN is that UE redistributes P-TMSI and specifies normal cycle time, points out the normal NRI of SGSN among the P-TMSI.
The shortcoming of prior art is: 1, the time of transferring user long, transfer to new SGSN from SGSN decision transferring user to the user, need the one-period time at least, for example 4 seconds; 2, the transfer process interacting message is frequent, needs twice signaling of foundation/release to connect, and causes network overhead excessive, if the user who shifts in the short time is many, can cause apparatus of load to increase the weight of.
Summary of the invention
The invention provides a kind of method of transferring user between different core network equipment simply, fast and efficiently.
The method of the present invention's transferring user between different core network equipment, comprise: service core net equipment will from user's equipment adhere to the request or the tracing section updating request transfer to target core network equipment, target core network equipment is set up signaling with wireless access network and is connected, and finishes adhering to of subscriber equipment or tracing section updating processing by target core network equipment.
Described service core net equipment will be from the method that request or tracing section updating request transfer to target core network equipment of adhering to of user's equipment: service core net equipment will be from the connection request message of wireless access network, be forwarded to target core network equipment by transport layer network, target core network equipment is received is connection request message from wireless access network; Or service core net equipment will be carried at service core net equipment and send in the signaling message of target core network equipment from the connection request message of wireless access network as message data; Or service core net equipment sends a signaling message to target core network equipment, points out that in message the user need transfer to target core network equipment, points out the message parameter of wireless access network sign, connection identifier and Attach Request message in simultaneously.
Described target core network equipment and wireless access network are set up the method that signaling is connected: target core network equipment is received Attach Request message or tracing section updating request message, for subscriber equipment is set up communication context information, storage customer equipment identification, wireless access network sign and connection identifier and foundation are related with this wireless access network, reply one to wireless access network then and connect acknowledge message.
At least carry following parameter in the described message:
Connection identifier, promptly connection request message point out, be the temporary mark that signaling connect to be distributed by wireless access network;
The equipment of the core network sign, i.e. the device identification of current equipment of the core network;
After wireless access network was received and connected acknowledge message, storage equipment of the core network sign and foundation were related with target core network equipment.
Set up that signaling is connected and finish adhering to of subscriber equipment or tracing section updating by target core network equipment at target core network equipment and wireless access network and also comprise the steps: between handling
Subscriber equipment temporary mark and the tracking area identification of target core network equipment by carrying in the Attach Request message, can know subscriber equipment in the past attached to service core net equipment, target core network equipment obtains the communication context information of subscriber equipment to service core net device request.
Described service core net equipment is issued target core network equipment sending in user's transfer request to target core network equipment together with the communication context information of subscriber equipment.
When core net was evolution block core net, described equipment of the core network was Mobility Management Entity/user entity MME/UPE, and described wireless access network is evolution wireless access network E-RAN.
When core net was the core net of 3G network, described equipment of the core network was service universal grouping wireless business supporting node SGSN, and described wireless access network is made up of radio network controller (RNC) and cell base station NodeB.
Described target core network equipment is by service core net choice of equipment.
Beneficial effect of the present invention is as follows:
(1) the present invention is by when the needs transferring user, by service core net equipment will from user's equipment adhere to the request or the tracing section updating request transfer to target core network equipment, target core network equipment is set up signaling with wireless access network and is connected, finish adhering to of subscriber equipment or tracing section updating processing by target core network equipment, primary network adheres to or the tracing section updating process thereby subscriber equipment only need be carried out, just can transfer to target core network equipment, transfer process is simple, efficient, quick;
(2) wireless access network only need identify (for example NRI) according to equipment of the core network and selects equipment of the core network, thereby wireless access network selects the mechanism of service core net equipment simpler;
(3) the present invention be by service core net equipment decision will from user's equipment adhere to request or target core network equipment is transferred in the tracing section updating request, and need not provide load information to wireless access network, because the quantity of equipment of the core network is less than the quantity of wireless access network far away in the evolvement network, therefore the whole network message number that is used to transmit the equipment of the core network load information greatly reduces.
Description of drawings
Fig. 1 is a UMTS schematic network structure of the prior art;
Fig. 2 is the chief component schematic diagram of evolvement network in the prior art;
Fig. 3 is the MME/UPE pond networking structure of evolvement network in the prior art;
Fig. 4 is the network attachment flow chart of evolvement network in the prior art;
When Fig. 5 carries out network attachment for the present invention UE in evolvement network between MME/UPE the transfer process schematic diagram.
Embodiment
Thinking of the present invention is: when needing transferring user, serving MME/UPE will from UE adhere to the request or the tracing section updating request transfer to target MME/UPE, target MME/UPE sets up signaling with E-RAN and is connected, and finishes adhering to of UE or tracing section updating processing by target MME/UPE.
Carrying out network attachment with UE below is that example illustrates user of the present invention transfer process between MME/UPE.Tracing section updating is similar with it, and what difference only was UE and MME/UPE exchange is tracing section updating request and acknowledge message, just describes no longer in addition here.
Figure 5 shows that when the present invention UE in evolvement network carries out network attachment transfer process schematic diagram between MME/UPE.Wherein, k MME/UPE forms MME/UPE pond, wherein MME/UPE
1Be serving MME/UPE of UE.MME/UPE
1Be about to overload, the UE that therefore carries out network attachment will be transferred among other MME/UPE.Concrete steps comprise:
501, UE carries out network attachment, for example carries out network attachment after the UE start, and UE sends Attach Request message to network.Attach Request message is the NAS message that UE sends to MME/UPE, and it is carried in the AS message as message data and sends to E-RAN by UE.In the Attach Request message, carry following parameter at least:
UE sign, for example IMSI or P-TMSI;
TAI, before this network attachment, the tracking area identification TAI of appointment simultaneously when evolution block core net is UE distribution temporary mark.
502, after E-RAN received AS message, finding had data (being Attach Request message) need be routed to MME/UPE in the AS message, and E-RAN checks the signaling connection that whether is established to MME/UPE for this UE.Because Attach Request message is article one NAS message that UE sends to MME/UPE, therefore the signaling to MME/UPE connects foundation.E-RAN is according to the MME/UPE sign of carrying in the AS message, and for example NRI is UE selection serving MME/UPE, MME/UPE
1Selected serving MME/UPE as UE.E-RAN is to MME/UPE
1Send connection request message, request and MME/UPE
1Set up signaling and connect, carry following parameter in the message at least:
Connection identifier, promptly E-RAN is that signaling connects the temporary mark that distributes, and is used for connecting in signaling of S1 interface identifier;
E-RAN ID, the i.e. device identification of E-RAN;
Attach Request message, promptly UE sends to the Attach Request message of MME/UPE.
503, MME/UPE
1After receiving connection request message, the data of decode messages obtain Attach Request message.Because MME/UPE
1Soon therefore overload determines that (serving MME/UPE judges whether that the foundation of transferring user can be: 1, MME/UPE load needs transferring user to transfer UE when for example MME/UPE transships in other MME/UPE; 2, operational maintenance command will need transferring user when for example MME/UPE will be restarted; 3, UE business information needs transferring user when for example MME/UPE does not provide UE request registration professional; 4, other information need transferring user when for example having new MME/UPE equipment to come into operation in the MME/UPE pond, so that the new equipment load of bearer network as early as possible).MME/UPE
1Be user's select target MME/UPE, MME/UPE
kSelected as the target MME/UPE after shifting.MME/UPE
1Transmit connection request and give MME/UPE
k, the method for transmitting connection request can be:
Method one: MME/UPE will be forwarded to target MME/UPE by transport layer network from the connection request message of E-RAN
k, target MME/UPE
kWhat receive is connection request message from E-RAN;
Method two: MME/UPE will be carried at MME/UPE from the connection request message of E-RAN as message data
1Send in the signaling message of target MME/UPEk, for example user's transfer request message;
Method three: MME/UPE sends a signaling message to target MME/UPEk, points out that in message the user need transfer to target MME/UPE, points out the message parameter of E-RAN sign, connection identifier and Attach Request message in the while, for example UE sign, TAI.
In a word, no matter adopt which kind of method, target MME/UPEk knows that finally the user asks to adhere to, and knows sign and the connection identifier of E-RAN.Employing method one in the present embodiment.
In this step, if MME/UPE receives is the tracing section updating request message, the user also will be transferred.But, if what receive is business request information, MME/UPE transferring user not then, MME/UPE sets up the service request that process is handled UE according to normal business.In addition, the target MME/UPE of different user may be different, and the algorithm that equipment is realized is depended in the selection of target MME/UPE.
504, target MME/UPEk receives Attach Request message, for UE sets up communication context, storage UE sign and E-RAN sign and connection identifier and foundation are related with this E-RAN's, reply a connection acknowledge message to E-RAN then, carry following parameter in the message at least:
Connection identifier, promptly connection request message point out, be the temporary mark that signaling connect to be distributed by E-RAN;
The MME/UPE sign, i.e. the device identification of current MME/UPEk;
After E-RAN received and connects acknowledge message, store M ME/UPE sign and foundation were related with target MME/UPEk's.So far, target MME/UPEk and E-RAN have write down the other side's ID and have set up incidence relation, and the double-head arrow dotted line among the figure after the step 4 represents that E-RAN and MME/UPEk have set up signaling and be connected.Be connected in case E-RAN has set up signaling with MME/UPE, all signaling messages of E-RAN and MME/UPE exchange comprise the signaling message that is used to transmit the NAS message that UE and MME/UPE exchange, and all will use this signaling to connect and transmit.
505, after MME/UPEk receives Attach Request message from UE, because the user is in the past attached among this MME/UPE, so the communication context information of no UE among the MME/UPEk.UE temporary mark and the TAI of MME/UPEk by carrying in the Attach Request message can know that UE is in the past attached to MME/UPE
1, MME/UPEk is to MME/UPE
1The communication context information of acquisition request UE.
506, HSS and MME/UPE carry out authentication to UE.
507, after the authentication success, MME/UPE sends login request message to HSS, carries the sign of UE and the sign of MME/UPE in the message at least.
508,, and discharge default IP carrying because serving MME/UPE of UE changes, so HSS indicates the communication context information of former serving MME/UPE deletion UE.
509, the information in the HSS storage login request message, for example the sign of MME/UPE is replied a registration confirmation message to MME/UPE then, the subscription data of portability user in HSS in acknowledge message.
510, step 510～514, identical with step 6～10 among prior art Fig. 4, be not described in detail here.
In addition, in step 503, former MME/UPE
1Also can be to target MME/UPE
kSend in user's transfer request, the communication context information of UE is issued target MME/UPE together, step 5 will be omitted so.
The present invention compared with prior art has the following advantages:
1, UE only need carry out that primary network adheres to or the tracing section updating process, just can transfer to target MME/UPE, and transfer process is simple, efficient, fast; And prior art needs UE to carry out once extra tracing section updating, and flow process complexity and transfer time are longer---need at least 4 second UE could initiate new RAU;
2, E-RAN selects the mechanism of serving MME/UPE simpler, and only need identifying (for example NRI) according to MME/UPE selects MME/UPE; And prior art requires E-RAN not only will select MME/UPE according to NRI, and when NRI is Null NRI, also needs to select MME/UPE according to load information or other the pre-configured data of MME/UPE;
3, MME/UPE need not provide load information to E-RAN, only need provide load information to other MME/UPE.Because the quantity of MME/UPE is less than the quantity of E-RAN far away in the evolvement network, therefore the whole network message number that is used to transmit the MME/UPE load information greatly reduces; For example: 100 E-RAN and 4 MME/UPE networkings, 1 each of MME/UPE needs to send 3 load message, rather than 100 load message.
More than flow process of the present invention also be applicable to the UMTS network.In the UMTS network, when needing transferring user, service SGSN will from UE adhere to request or target SGSN is transferred in the tracing section updating request, target SGSN is set up signaling with wireless access network and is connected, and finishes the processing of adhering to of UE or tracing section updating by target SGSN.
In the UMTS network, detailed process that UE shifts between SGSN when carrying out network attachment and the flow process of Fig. 5 are similar, are not described in detail here.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (11)
1. the method for a transferring user between different core network equipment, comprise: service core net equipment will from user's equipment adhere to the request or the tracing section updating request transfer to target core network equipment, target core network equipment is set up signaling with wireless access network and is connected, and finishes adhering to of subscriber equipment or tracing section updating processing by target core network equipment.
2. the method for claim 1, it is characterized in that, described service core net equipment will be from the method that request or tracing section updating request transfer to target core network equipment of adhering to of user's equipment: service core net equipment will be from the connection request message of wireless access network, be forwarded to target core network equipment by transport layer network, target core network equipment is received is connection request message from wireless access network, carries in the connection request message from attach request of user equipment message or tracing section updating request message.
3. the method for claim 1, it is characterized in that, described service core net equipment will be from the method that request or tracing section updating request transfer to target core network equipment of adhering to of user's equipment: service core net equipment will be from the connection request message of wireless access network as message data, be carried at service core net equipment and send in the signaling message of target core network equipment, carry in the connection request message from attach request of user equipment message or tracing section updating request message.
4. the method for claim 1, it is characterized in that, described service core net equipment will be from the method that request or tracing section updating request transfer to target core network equipment of adhering to of user's equipment: service core net equipment sends a signaling message to target core network equipment, point out that in message the user need transfer to target core network equipment, point out wireless access network sign, the connection identifier of wireless access network distribution and the message parameter of Attach Request message or tracing section updating request message simultaneously.
5. the method for claim 1, it is characterized in that, described target core network equipment and wireless access network are set up the method that signaling is connected: target core network equipment is received Attach Request message or tracing section updating request message, for subscriber equipment is set up communication context information, storage customer equipment identification and wireless access network sign, connection identifier are also set up related with this wireless access network, reply a connection acknowledge message to wireless access network then.
6. method as claimed in claim 5 is characterized in that, described connection acknowledge message is carried following parameter at least:
Connection identifier, promptly connection request message is pointed out, is that signaling connects the temporary mark that distributes by wireless access network;
The equipment of the core network sign, i.e. the device identification of current equipment of the core network;
After then wireless access network was received and connected acknowledge message, storage equipment of the core network sign and foundation were related with target core network equipment.
7. method as claimed in claim 5, it is characterized in that, set up that signaling is connected and finish adhering to of subscriber equipment or tracing section updating by target core network equipment at target core network equipment and wireless access network and also comprise the steps: the subscriber equipment temporary mark and the tracking area identification that carry during target core network equipment is by Attach Request message between handling, can know subscriber equipment in the past attached to service core net equipment, target core network equipment obtains the communication context information of subscriber equipment to service core net device request.
8. method as claimed in claim 5 is characterized in that, described service core net equipment is issued target core network equipment sending in user's transfer request to target core network equipment together with the communication context information of subscriber equipment.
9. the method for claim 1 is characterized in that, when core net was evolution block core net, described equipment of the core network was Mobility Management Entity/user entity MME/UPE, and described wireless access network is evolution wireless access network E-RAN.
10. the method for claim 1, it is characterized in that, when core net was the core net of 3G network, described equipment of the core network was service universal grouping wireless business supporting node SGSN, and described wireless access network is made up of radio network controller (RNC) and cell base station NodeB.
11. the method for claim 1 is characterized in that, described target core network equipment is by service core net choice of equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006100610031A CN101083830A (en) | 2006-06-01 | 2006-06-01 | Method for transferring users among different core network equipments |
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| CNA2006100610031A CN101083830A (en) | 2006-06-01 | 2006-06-01 | Method for transferring users among different core network equipments |
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