CN100428851C - Method for transferring user inside node pool of core network, and node - Google Patents
Method for transferring user inside node pool of core network, and node Download PDFInfo
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- CN100428851C CN100428851C CNB2005100909212A CN200510090921A CN100428851C CN 100428851 C CN100428851 C CN 100428851C CN B2005100909212 A CNB2005100909212 A CN B2005100909212A CN 200510090921 A CN200510090921 A CN 200510090921A CN 100428851 C CN100428851 C CN 100428851C
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Abstract
The method comprises: when mobile station (MS) initiates a joint attach request or a route area/location area renewing request, if the MSC/VLR selected by the serving SGSN needs to be transferred to other MSC/VLR due to heavy load or reset, it returns a location renew acceptance message carrying virtual NRI to the serving SGSN; the according to the NRI carried in the location renew acceptance message, the serving SGSN decides if the MS needs to be transferred to other MSC/VLR; the serving SGSN reselects the serving MSC/VLR in node pool, and re-initiates a location renewing request to transfer the MS to other MSC/VLR.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind ofly in core net (CN) node pool, adhere to initiating to unite or mobile subscriber that the joint route area/location upgrades transfers to another MSC/VLR from a MSC/VLR and unites and adhere to or the joint route area/location method of new technological process more.
Background technology
According to third generation collaborative project (3rd Generation partnership Project, 3GPP) standard, wireless access network (Radio Access Network, RAN) node can with a plurality of core net (Core Network, CN) node connects, and forms many-to-many relationship.Wherein, the RAN node comprise radio network controller (RadioNetwork Controller, RNC) and base station controller (BSC); The CN node comprises the mobile switching centre (MSC) of circuit domain (CS), and the Serving GPRS Support Node of packet domain (PS) (Serving GPRSSupport Node, SGSN).3GPP standard TS23.236 has proposed the notion of pool area (Pool-Area): a pool area is formed in the zone that some RAN nodes cover, and when user terminal is roamed in this zone, does not change for it provides the CN node of service.Can reduce like this because of the CN node changes and cause initiating more new technological process of position, the signaling between the minimizing CN node.
A pool area provides service concurrently by several CN nodes usually, but also can provide service by a CN node.When a pool area provided service concurrently by several CN nodes, these CN nodes were promptly formed a CN node pool, i.e. MSC pond or SGSN pond.A CN node pool also can provide service for several pool areas simultaneously.
For CN node of sign in a CN node pool, each CN node is assigned with one or several network resource identifiers (NRI), and by operation maintenance center the NRI that distributes is configured in the CN node.When the CN node be MS when distributing interim moving station mark (TMSI/P-TMSI) (if the CN node is MSC, distribution T MSI then; If the CN node is SGSN, then distribute P-TMSI), the NRI that inserts this CN node in TMSI or P-TMSI identifies.The NRI of 0～10Bits variable-length is positioned at Bit23～Bit14 of TMSI/P-TMSI, and the length of its actual significant bit of NRI among the TMSI/P-TMSI depends on the network planning and can disposing by operation maintenance center.In the RAN node, dispose the corresponding relation of interior all the CN nodes of CN node pool and its NRI; In the CN node pool, each CN node also disposes the NRI of other CN nodes.
When user terminal enters pool area,, it in the TMSI/P-TMSI that distributes, points out NRI for providing the CN node (also being service CN node) of service.In this pool area, each user terminal is established to the Non-Access Stratum of CN node, and (Non-Access Stratum, when NAS) connecting, RNC is routed to initial NAS message according to NRI the CN node of NRI appointment.Like this, in pool area, user terminal uses same CN node.
In the prior art, when network operation mode is I (being that the SGSN in PS territory and the MSC/VLR in CS territory have Gs interface), for saving the resource of air interface, support the MS of PS and CS business will carry out combined process flow simultaneously, so that be accomplished to adhering to or the position renewal of PS territory and CS territory simultaneously.Combined process flow comprises: associating general packet radio service gprs/IMSI (international mobile subscriber identification code) adheres to, the joint route area/location upgrades.
When carrying out associating GPRS/IMSI attachment flow, SGSN sends position updating request (Location Update Request) message to mobile switching centre/Visited Location Registor (MSC/VLR), and request IMSI adheres to; When carrying out the joint route area/location and upgrading, carry out if desired that IMSI adheres to or updating location information, as LAI (Location Area Identity; Location Area Identification) change has taken place, SGSN sends location update request message to MSC/VLR, and request IMSI adheres to or the position is upgraded.Send before the location update request message, SGSN is mobile radio station (Mobile Station, MS) select service MSC/VLR, system of selection is: use Hash (Hash) algorithm computation to go out the hash value of IMSI, use this hash value to select MSC/VLR, the corresponding unique hash value of IMSI changes even it is hereby ensured SGSN, and new SGSN still chooses same MSC/VLR.
Be example with associating GPRS/IMSI attachment flow below, describe the process that SGSN selects MSC/VLR.As shown in Figure 1, comprising:
1, support the MS start of PS and CS business simultaneously after, at first need to be attached to network.Owing between SGSN and the MSC/VLR Gs interface is arranged, network instruct MS in system broadcast message is carried out associating GPRS/IMSI and is adhered to.MS initiates associating GPRS/IMSI and adheres to, and sends to SGSN and adheres to request (AttachRequest) message, and message carries type of attachment (Attach Type) and user ID.User ID is P-TMSI or IMSI, and type of attachment is " associating GPRS/IMSI adheres to " (Combined GPRS/IMSIattach).
2, after SGSN receives Attach Request message, the SGSN IMSI of this MS not if carry P-TMSI in the message, SGSN will be to old SGSN (being that MS roams into the service SGSN before local) or MS request IMSI (this process does not illustrate in the drawings).SGSN selects MSC/VLR according to the hash value of IMSI, and sends position updating request (Location Update Request) to selected MSC/VLR, and request MSC/VLR carries out IMSI and adheres to, and points out IMSI, LAI and SGSN numbering (SGSNNumber) in the message.
3, after MSC/VLR receives location update request message, IMSI and the LAl of MSC/VLR record MS, and be MS distribution T MSI, MSC/VLR is related by the foundation of record SGSN coding and SGSN's; At last, MSC/VLR sends the position to SGSN and upgrades acceptance (Location Update Accept) message, carries the TMSI of distribution in the message.
4, SGSN receive the position upgrade accept message after, set up related with MSC/VLR by record MSC/VLR numbering, and be MS distribution P-TMSI; At last, SGSN sends to MS and adheres to acceptance (Attach Accept) message, carries the TMSI of MSC/VLR distribution and the P-TMSI that SGSN distributes in the message.MS is the TMSI and the P-TMSI of memory allocation, and uses TMSI or P-TMSI as user ID.
5, after MS received that the Routing Area Update that carries TMSI and P-TMSI is accepted message, SGSN replied to adhere to and finishes message to service.
Distributed TMSI if 6 MSCNLR are MS, service SGSN replys the TMSI Reallocation Complete message to service MSC/VLR, and indication TMSI is allocated successfully.
So far, MS finishes adhering to of GPRS and IMSI simultaneously, is accomplished to the registration of the core network of PS and CS.
The joint route area/location more implementation and the associating GPRS/IMSI attachment flow described above of new technological process is similar, and SGSN selects the method for MSC/VLR identical, and promptly SGSN selects MSC/VLR according to the hash value of IMSI.
In above-mentioned flow process, MSC/VLR overload of selecting as SGSN or MSC/VLR are just preparing executable operations and are safeguarding (O﹠amp; M) operation (for example edition upgrading before restarting), this moment, operator wished MS is transferred among other MSC/VLR in the node pool, but above prior art can not realize the transfer of MS between MSC/VLR.
Summary of the invention
The invention provides a kind of in node pool of core network the method and the node of transferring user, can not realize in the prior art that in order to solve mobile radio station (MS) MSC/VLR in the node pool transfers to another MSC/VLR and unites and adhere to or the joint route area/location problem of new technological process more.
The present invention is applied to MS and is engaged in that (GPRS) support node (SGSN) initiates that associating GPRS/IMSI (international mobile subscriber identification code) adheres to or joint route area/location new technological process more to service universal packet wireless business, comprises the following steps:
A, service SGSN select a MSC/VLR to initiate position updating request as service MSC/VLR after receiving and uniting of MS initiation adhering to request or joint route area/location update request;
B, described service MSC/VLR be if judge and MS need be transferred to other MSC/VLR, then returns the position of carrying self virtual network resource identification (NRI) to service SGSN and upgrade and accept message; Otherwise, return the position of carrying self normal NRI to service SGSN and upgrade and accept message;
C, service SGSN judge that the position that service MSC/VLR returns upgrades the NRI that accepts to carry in the message, if described virtual NRI selects then that other MSC/VLR initiate position updating request again as service MSC/VLR in the node pool, go to step B; If described normal NRI carries out then that routine is adhered to or position new technological process more.
Select a MSC/VLR to initiate position updating request described in the steps A as service MSC/VLR, comprise: service SGSN whether check with the CN node pool in mobile switching centre/Visited Location Registor (MSC/VLR) set up the related of Gs interface, if then select related MSC/VLR to initiate position updating request as the service MSC/VLR of MS; Otherwise, select the low MSC/VLR of load as service MSC/VLR according to the load state information of MSC/VLR in the CN node pool, initiate position updating request.
Select described in the step C that other MSC/VLR initiate position updating request again as service MSC/VLR in the node pool, concrete grammar comprises: select at random MSC/VLR, poll in the node pool select in the node pool MSC/VLR, select according to the load state of the MSC/VLR in the node pool.
According to said method of the present invention, each MSC/VLR is configured a unique virtual NRI in the node pool.
According to said method of the present invention, after a MSC/VLR in the described node pool accepts position updating request in the MS associating attachment flow, this service MSC/VLR is that MS distributes interim moving station mark (TMSI), record service SGSN numbering (SGSN Number), and foundation and service SGSN's is related; And return the position renewal of carrying TMSI and self normal NRI information to service SGSN and accept message;
After service SGSN receives that message is accepted in the position renewal of carrying described TMSI and normal NRI information, be that MS distributes P-TMSI, record service MSC/VLR numbering, foundation and service MSC/VLR's is related; And carry adhering to of described TMSI and P-TMSI to the MS transmission and accept message.
According to said method of the present invention, after MS received that carrying adhering to of TMSI and P-TMSI accepts message, SGSN replied to adhere to and finishes message to service; Service SGSN replys the TMSI Reallocation Complete message to service MSC/VLR.
According to said method of the present invention, when a MSC/VLR in the described node pool accepts MS joint route area/location more after the position updating request in the new technological process, this service MSC/VLR is that MS distributes interim moving station mark (TMSI), record service SGSN numbering (SGSN Number), and foundation and service SGSN's is related; And return the position renewal of carrying TMSI and self normal NRI information to service SGSN and accept message;
After service SGSN receives that message is accepted in the position renewal of carrying described TMSI and normal NRI information, be that MS distributes P-TMSI, record service MSC/VLR numbering (MSC/VLR Number), foundation and service MSC/VLR's is related; And send the Routing Area Update carry described TMSI and P-TMSI to MS and accept message.
According to said method of the present invention, after MS receives that the Routing Area Update that carries TMSI and P-TMSI is accepted message, reply Routing Area Update to service SGSN and finish message; Service SGSN replys the TMSI Reallocation Complete message to service MSC/VLR.
According to said method of the present invention, described service SGSN is the old SGSN in the MS associating attachment flow, or a new SGSN who is selected by radio network controller (RNC).
If MS initiates joint route area/location update request to described new SGSN, then also comprise:
New SGSN sends the SGSN context request to old SGSN;
After old SGSN retrieves the contextual information of this MS, return the SGSN context response information that comprises contextual information.
If old SGSN with node pool in a MSC/VLR set up the related of Gs interface, then in the SGSN context response information that new SGSN returns, also carry related MSC/VLR Number information at old SGSN; After new SGSN receives the SGSN context response information, select the service MSC/VLR of the MSC/VLR of this related MSC/VLR Number indication as MS.
The present invention provides a kind of MSC/VLR node in addition, comprises the MSC/VLR basic functional units, also comprises:
Local virtual NRI memory cell: memory allocation is given the virtual NRI information of this MSC/VLR node, and is unique in the node pool of described NRI under this MSC/VLR node;
Local virtual NRI uses the unit: when the MSC/VLR node can not be accepted to serve the position updating request of SGSN node initiation, obtain the virtual NRI that stores in the described local virtual NRI memory cell, accept message by the position renewal and carry to described service SGSN node.
The present invention also provides a kind of SGSN node, comprises the SGSN basic functional units, also comprises:
The virtual NRI memory cell of node pool: memory allocation is given the virtual NRI information of each MSC/VLR node in the node pool;
The virtual NRI judging unit of node pool: the NRI that accepts to carry in the message is upgraded in the position that returns to service SGSN node according to service MSC/VLR node, judge whether the NRI that stores in the virtual NRI memory cell of described node pool, if not, flow processing routinely then; If then output signal to node gravity treatment unit;
Node gravity treatment unit: in node pool, reselect service MSC/VLR node, initiate position updating request.
Adopt the present invention, when initiating to unite, MS adheres to or during the routing area/location update request, if the MSC/VLR that service SGSN selects need transfer to other MSC/VLR with MS because of reasons such as load are overweight or restart, then return the position renewal of carrying virtual NRI and accept message to service SGSN; Service SGSN upgrades the virtual NRI that accepts to carry in the message according to the position that receives and judges that needs shift MS to other MSC/VLR, service SGSN reselects service MSC/VLR in node pool, again initiate position updating request, MS is transferred to smoothly other MSC/VLR adhere to or the location area updating flow process.The present invention can guarantee that MS unites and adhere to and the joint route district is updated to power, realize simply and not influencing the follow-up business of MS.
Description of drawings
Fig. 1 is associating GPRS/IMSI attachment flow figure of the prior art;
Fig. 2 is the more Signalling exchange flow chart of new technological process of associating GPRS/IMSI attachment flow of the present invention and joint route area/location;
Fig. 3 is a MSC/VLR node structure schematic diagram of the present invention;
Fig. 4 is a SGSN node structure schematic diagram of the present invention.
Embodiment
Form a node pool by several MSC/VLR, SGSN is the unique virtual NRI of each MSC/VLR configuration in the node pool, and stores the pairing virtual NRI of each MSC/VLR node in this locality.
The basic principle of the inventive method is: adhere to or during the routing area/location update request, carry out MSC/VLR by service SGSN and select when MS initiates to unite to service SGSN; If the MSC/VLR that service SGSN selects is current can not accept position updating request (as MSC/VLR overload or other reason) decision and shift MS to other MSC/VLR the time, then returns the position of carrying self virtual NRI and upgrade and accept message to service SGSN; Service SGSN upgrades the virtual NRI that accepts to carry in the message according to the position that receives and judges that needs shift MS to other MSC/VLR, service SGSN reselects service MSC/VLR in node pool, again initiate position updating request, MS is transferred to smoothly other MSC/VLR adhere to or the location area updating flow process.
Referring to as shown in Figure 2, be associating GPRS/IMSI attachment flow of the present invention and the joint route area/location Signalling exchange flow chart of new technological process more, among Fig. 2, the service SGSN of MS is selected by radio network controller (RNC), because the present invention does not relate to the process that RNC selects SGSN, so be omitted at this.As shown in the figure, suppose that the MSC node pool is made up of K MSC/VLR, SGSN selects MSC/VLR earlier
1, because of MSC/VLR
1Overload, SGSN selects MSC/VLR
KAs new service MSC/VLR.Idiographic flow is as follows:
1, MS initiation associating GPRS/IMSI adheres to request, send Attach Request message to SGSN, the sign that comprises MS in this request message, this sign can be the IMSI of MS, also can be that the service SGSN that MS roams into before local is the P-TMSI that MS distributes, carry the NRI of the SGSN that distributes this P-TMSI among this P-TMSI;
If do not comprise the IMSI of MS in the Attach Request message that MS initiates, receive that then the current service SGSN that adheres to request is according to the P-TMSI that comprises in the request message, navigate to the old SGSN that distributes this P-TMSI, and, perhaps directly obtain its IMSI from MS from the IMSI that this old SGSN obtains MS;
2, after SGSN receives Attach Request message, whether at first check with node pool in certain MSC/VLR set up the related of Gs interface; If set up the Gs association, then select MSC/VLR associated therewith; If foundation is related, SGSN selects the low MSC/VLR of load according to the load state information of MSC/VLR in the CN node pool, and (the service MSC/VLR of hypothesis selection in this example is MSC/VLR as service MSC/VLR
1); Then, SGSN is to selected MSC/VLR
1Send location update request message, in message, comprise IMSI, LAI and the SGSN coding (SGSNNumber) of MS;
3, selected MSC/VLR
1After receiving location update request message, but can not accept to serve the position updating request that SGSN initiates because of self overload or other reasons (for example before the edition upgrading restart etc.), decision is shifted MS to other MSC/VLR; MSC/VLR
1Accept message to the renewal of service SGSN response position, and in this message, be included as the TMSI that carries virtual NRI that MS distributes;
4, SGSN receives from MSC/VLR
1The position upgrade accept message after, the NRI that TMSI in the message is carried compares with being stored in local virtual NRI, is virtual NRI if judge, and then needs to serve MSC/VLR for MS selects other again; The method of selecting can be in node pool, select at random, repeating query is selected, according to the load state of MSC/VLR is selected or other are relevant with realization system of selection; Suppose that service SGSN reselects the MSC/VLR in the node pool
KAs new service MSC/VLR, service SGSN initiates position updating request again, continues following flow process;
If in this step service SGSN receive the position upgrade accept message after, judging the NRI that TMSI carries is MSC/VLR
1Normal NRI then handles by normal flow;
5, MSC/VLR
KJudge self energy receiving position update request, then write down IMSI and the LAI of MS, be MS distribution T MSI, and in this TMSI, insert MSC/VLR
KNormal NRI; MSC/VLR
KSet up related with SGSN by record SGSN Number; MSC/VLR
KSend the position to service SGSN at last and upgrade and accept message, and the TMSI that carries self normal NRI that is included as in this message that MS distributes;
6, after SGSN received that message is accepted in the position renewal, judging the NRI that carries was not virtual NRI, then writes down MSC/VLR
KNumber sets up and MSC/VLR
KAssociation, and be that MS distributes P-TMSI; At last, SGSN sends to adhere to MS and accepts message, carries service MSC/VLR in the message
KThe TMSI and the service SGSN that distribute for MS are the P-TMSI that MS distributes; MS will store this TMSI and P-TMSI, and use TMSI or P-TMSI as user ID.
So far, finished associating GPRS/IMSI attachment flow.
In above-mentioned flow process, if in the step 5, SGSN receive the position upgrade accept message after, judge the NRI that TMSI carries and remain virtual NRI, then in node pool, reselect a MSC/VLR as service MSC/VLR, up to choose one can accept MSC/VLR that IMSI adheres to request till.
If the position change of MS and cause the route district to change, perhaps during the timer expiry of control cycle Routing Area Update, MS will carry out more new technological process of joint route area/location, and MS initiates the Routing Area Update request to service SGSN.Usually, RNC is routed to original service SGSN according to NRI Routing Area Update request message, and when still maybe needing to restart as if original service SGSN load is overweight, RNC can be routed to the Routing Area Update request message new SGSN.The service SGSN that following steps are selected with RNC changes and is example.
7, the Routing Area Update request message that sends of MS is to new SGSN, and (Routing Area Information RAI) and P-TMSI, carries the NRI of the old SGSN that distributes this P-TMSI among this P-TMSI to comprise route district information in this request message;
8, the NRI of the SGSN that carries according to the RAI in the request message and P-TMSI of new SGSN determines the address of old SGSN, and sends the SGSN context request message to old SGSN, and request obtains the contextual information of MS in old SGSN;
9, old SGSN retrieves the contextual information of MS, and contextual information is returned to new SGSN by the SGSN context response information; If it is related that old SGSN and MSC/VLR establish Gs interface, then also carry related MSC/VLRNumber in the SGSN context response information;
10, new SGSN selects MSC/VLR Number appointed MSC/VLR, and sends location update request message to this MSC/VLR, comprises IMSI, LAl and new SGSNNumber in this request message;
If do not comprise MSC/VLR Number in the contextual information that new SGSN receives, or MSC/VLRNumber appointed MSC/VLR is unavailable or not in the MSC/VLR node pool, then new SGSN selects the low MSC/VLR of load as service MSC/VLR according to the load state information of MSC/VLR in the CN node pool;
In this flow process, suppose that new SGSN has finally selected MSC/VLR
K
11, MSC/VLR
KIMSI and the LAI of record MS are MS distribution T MSI, and insert MSC/VLR in this TMSI
KNormal NRI; MSC/VLR
KSet up and serve the related of SGSN by writing down SGSN Number; MSC/VLR
KSend to service SGSN at last and carry MSC/VLR
KThe position of normal NRI upgrade and to accept message;
12, after SGSN received that message is accepted in the position renewal, at first the NRI that TMSI in the message is carried compared with being stored in this local virtual NRI, if not virtual NRI then writes down MSC/VLR
kNumbering, set up and MSC/VLR
KAssociation, and be that MS distributes P-TMSI; At last, SGSN sends Routing Area Update to MS and accepts message, carries MSC/VLR in the message
KThe TMSI and the service SGSN that distribute for MS are the P-TMSI that MS distributes; MS will store this TMSI and P-TMSI, and use TMSI or P-TMSI as user ID.
So far, finished more new technological process of joint route area/location.
In above-mentioned flow process, if in the step 11, MSC/VLR
KAfter receiving location update request message, but because of self overload or other reasons, the MSC/VLR of MS to other shifted in decision, carries out the following step:
Step S1:MSC/VLR
KBe MS distribution T MSI, and in this TMSI, carry MSC/VLR
KVirtual NRI; MSC/VLR
KAccept message to the renewal of SGSN response position, and in this message, be included as the TMSI that carries virtual NRI that MS distributes;
Step S2: service SGSN receives from MSC/VLR
KThe position upgrade accept message after, the NRI that TMSI in the message is carried be stored in this local MSC/VLR
KVirtual NRI compare, therefore judging this NRI is virtual NRI, needs select for MS again other MSC/VLR; The method of selecting as previously mentioned, can be select at random, repeating query is selected, according to the load selection etc.; Repeat above-mentioned steps, a MSC/VLR in node pool accepts till the position updating request;
13, after MS receives that the Routing Area Update of new SGSN transmission is accepted message, store the TMSI and the P-TMSI that comprise in this message; And reply Routing Area Update to new SGSN and finish message;
14, new SGSN replys the TMSI route to this service MSC/VLR and finishes message, and expression TMSI distributes end.
Above-mentioned routing area/location is more in the new technological process, be to change with service SGSN to be example, if service SGSN does not change, step 8 and 9 is omitted, because SGSN stores related MSC/VLRNumber, so service SGSN still can select the related indicated MSC/NLR of MSC/VLR Number in the step 10.
According to said method of the present invention, the invention provides a kind of MSC/VLR node and SGSN node.
MSC/VLR node structure provided by the invention comprises the MSC/VLR basic functional units as shown in Figure 3, also comprises:
Local virtual NRI memory cell: memory allocation is given the virtual NRI information of this MSC/VLR node, and is unique in the node pool of described NRI under this MSC/VLR node;
Local virtual NRI uses the unit: when the MSC/VLR node can not be accepted to serve the position updating request of SGSN node initiation, obtain the virtual NRI that stores in the described local virtual NRI memory cell, accept message by the position renewal and carry to described service SGSN node.
SGSN node structure provided by the invention comprises the SGSN basic functional units as shown in Figure 4, also comprises:
The virtual NRI memory cell of node pool: memory allocation is given the virtual NRI information of each MSC/VLR node in the node pool;
The virtual NRI judging unit of node pool: the NRI that accepts to carry in the message is upgraded in the position that returns to service SGSN node according to service MSC/VLR node, judge whether the NRI that stores in the virtual NRI memory cell of described node pool, if not, flow processing routinely then; If then output signal to node gravity treatment unit;
Node gravity treatment unit: in node pool, reselect service MSC/VLR node, initiate position updating request.
Describe as can be known by above flow process description and CN node web frame, SCSN is the virtual NRI who is different from its common NRI of each MSC/VLR configuration in the node pool, and this virtual NRI is unique in node pool.At associating GPRS/IMSI attachment flow that MS initiates and joint route area/location more in the new technological process, when the MSC/VLR of SGSN selection does not accept position updating request, then upgrade and accept to carry in the message its virtual NRI, represent that this MSC/VLR determines the MSC/VLR of mobile MS to other in the position of returning; SGSN upgrades the NRI that accepts to carry in the message according to the position of receiving, judge whether to be virtual NRI, if virtual NRI then reselects MSC/VLR in the CN node pool, MS transferred to smoothly that other MSC/VLR adhere to or routing area/location new technological process more, guarantee that MS adheres to and the Routing Area Update success rate, and do not influence the follow-up business of MS.
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 (13)
1, a kind of in core net CN node pool the method for transferring user, be applied to mobile radio station MS and initiate that associating GPRS/ international mobile subscriber identification code IMSI adheres to or joint route area/location new technological process more to service universal packet wireless business affair GPRS Support Node SGSN, this method comprises the following steps:
A, service SGSN select a MSC/VLR to initiate position updating request as service MSC/VLR after receiving and uniting of MS initiation adhering to request or joint route area/location update request;
B, described service MSC/VLR be if judge and MS need be transferred to other MSC/VLR, then returns the position of carrying self virtual network resource identification NRI to service SGSN and upgrade and accept message; Otherwise, return the position of carrying self normal NRI to service SGSN and upgrade and accept message;
C, service SGSN judge that the position that service MSC/VLR returns upgrades the NRI that accepts to carry in the message, if described virtual NRI selects then that other MSC/VLR initiate position updating request again as service MSC/VLR in the node pool, go to step B; If described normal NRI carries out then that routine is adhered to or position new technological process more.
2, the method for claim 1, it is characterized in that, select a MSC/VLR to initiate position updating request described in the steps A as service MSC/VLR, comprise: service SGSN whether check with the CN node pool in mobile switching centre/Visited Location Registor MSC/VLR set up the related of Gs interface, if then select related MSC/VLR to initiate position updating request as the service MSC/VLR of MS; Otherwise, select the low MSC/VLR of load as service MSC/VLR according to the load state information of MSC/VLR in the CN node pool, initiate position updating request.
3, the method for claim 1, it is characterized in that, select described in the step C that other MSC/VLR initiate position updating request again as service MSC/VLR in the node pool, concrete grammar comprises: select at random MSC/VLR, poll in the node pool select in the node pool MSC/VLR, select according to the load state of the MSC/VLR in the node pool.
4, the method for claim 1 is characterized in that, each MSC/VLR is configured a unique virtual NRI in the node pool.
5, the method for claim 1, it is characterized in that, after a MSC/VLR in the described node pool accepts position updating request in the MS associating attachment flow, this service MSC/VLR is that MS distributes interim moving station mark TMSI, record service SGSN numbering SGSN Number, and foundation and service SGSN's is related; And return the position renewal of carrying TMSI and self normal NRI information to service SGSN and accept message;
After service SGSN receives that message is accepted in the position renewal of carrying described TMSI and normal NRI information, be that MS distributes P-TMSI, record service MSC/VLR numbering, foundation and service MSC/VLR's is related; And carry adhering to of described TMSI and P-TMSI to the MS transmission and accept message.
6, method as claimed in claim 5 is characterized in that, after MS received that carrying adhering to of TMSI and P-TMSI accepts message, SGSN replied to adhere to and finishes message to service; Service SGSN replys the TMSI Reallocation Complete message to service MSC/VLR.
7, the method for claim 1, it is characterized in that, when a MSC/VLR in the described node pool accepts MS joint route area/location more after the position updating request in the new technological process, this service MSC/VLR is that MS distributes interim moving station mark TMSI, record service SGSN numbering SGSNNumber, and foundation and service SGSN's is related; And return the position renewal of carrying TMSI and self normal NRI information to service SGSN and accept message;
After service SGSN receives that message is accepted in the position renewal of carrying described TMSI and normal NRI information, be that MS distributes P-TMSI, record service MSC/VLR numbering MSC/VLR Number, foundation and service MSC/VLR's is related; And send the Routing Area Update carry described TMSI and P-TMSI to MS and accept message.
8, method as claimed in claim 7 is characterized in that, after MS receives that the Routing Area Update that carries TMSI and P-TMSI is accepted message, replys Routing Area Update to service SGSN and finishes message; Service SGSN replys the TMSI Reallocation Complete message to service MSC/VLR.
9, method as claimed in claim 7 is characterized in that, described service SGSN is the old SGSN in the MS associating attachment flow, or a new SGSN who is selected by radio network controller (RNC).
10, method as claimed in claim 9 is characterized in that, if MS initiates joint route area/location update request to described new SGSN, then also comprises:
New SGSN sends the SGSN context request to old SGSN;
After old SGSN retrieves the contextual information of this MS, return the SGSN context response information that comprises contextual information.
11, method as claimed in claim 10, it is characterized in that, if old SGSN with node pool in a MSC/VLR set up the related of Gs interface, then in the SGSN context response information that new SGSN returns, also carry related MSC/VLR Number information at old SGSN; After new SGSN receives the SGSN context response information, select the service MSC/VLR of the MSC/VLR of this related MSC/VLR Number indication as MS.
12, a kind of MSC/VLR node comprises the MSC/VLR basic functional units, it is characterized in that, also comprises:
Local virtual network resource identifier NRI memory cell: memory allocation is given the virtual NRI information of this MSC/VLR node, and is unique in the node pool of described NRI under this MSC/VLR node;
Local virtual NRI uses the unit: when the MSC/VLR node can not be accepted to serve the position updating request of SGSN node initiation, obtain the virtual NRI that stores in the described local virtual NRI memory cell, accept message by the position renewal and carry to described service SGSN node.
13, a kind of SGSN node comprises the SGSN basic functional units, it is characterized in that, also comprises:
Node pool virtual network resource identification NRI memory cell: memory allocation is given the virtual NRI information of each MSC/VLR node in the node pool;
The virtual NRI judging unit of node pool: the NRI that accepts to carry in the message is upgraded in the position that returns to service SGSN node according to service MSC/VLR node, judge whether the NRI that stores in the virtual NRI memory cell of described node pool, if not, flow processing routinely then; If then output signal to node gravity treatment unit;
Node gravity treatment unit: in node pool, reselect service MSC/VLR node, initiate position updating request.
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| CN101925175B (en) * | 2008-03-18 | 2013-01-23 | 电信科学技术研究院 | Method and device for obtaining user identifier in attaching process and user apparatus |
| CN101541075B (en) * | 2008-03-18 | 2012-03-28 | 电信科学技术研究院 | Method and device for acquiring user identifier in attachment process |
| CN101350960B (en) * | 2008-08-12 | 2012-04-25 | 华为技术有限公司 | Method, system and equipment for migrating load base on MSC pool |
| WO2010112037A1 (en) * | 2009-03-31 | 2010-10-07 | Telefonaktiebolaget Lm Ericsson (Publ). | Redistribution of terminals |
| CN101895913B (en) * | 2009-05-19 | 2012-10-31 | 中国移动通信集团公司 | User data backup and acquisition methods, systems and devices |
| CN102026406A (en) * | 2010-12-09 | 2011-04-20 | 大唐移动通信设备有限公司 | Method and device for maintaining service continuity |
| WO2014000242A1 (en) * | 2012-06-29 | 2014-01-03 | 华为技术有限公司 | Registration method, sgsn and user equipment |
| GB2508160A (en) * | 2012-11-21 | 2014-05-28 | Ibm | Avoiding conflicts between computing machines |
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