CN100596082C - Method for implementing transfer of service core network node - Google Patents
Method for implementing transfer of service core network node Download PDFInfo
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- CN100596082C CN100596082C CN200510074954A CN200510074954A CN100596082C CN 100596082 C CN100596082 C CN 100596082C CN 200510074954 A CN200510074954 A CN 200510074954A CN 200510074954 A CN200510074954 A CN 200510074954A CN 100596082 C CN100596082 C CN 100596082C
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Abstract
The invention discloses a realizing method of service core network (CN) node transmission, which is characterized by the following: the original CN node requires object CN node to distribute temporarymark for user terminal equipment; the object node allocates temporary mark for user terminal equipment, which provides temporary mark for user terminal equipment; the method simplifies the processingstep, which improves efficiency of CN node in the transmission flow path.
Description
Technical field
The present invention relates to the core network technology, be meant a kind of method that realizes that service core network node shifts especially.
Background technology
According to third generation collaborative project (3GPP, 3rd Generation Partnership Project) standard, Radio Access Network (RAN, Radio Access Network) node can with a plurality of core network (CN, Core Network) node links to each other, and forms the corresponding relation of multi-to-multi.The RAN node can be radio network controller (RNC, Radio Network Controller) or base station controller (BSC, Basic StationController).The CN node of circuit domain is mobile switching centre (MSC, Mobile SwitchingCentre), and the CN node of packet domain is service universal grouping wireless business supporting node (SGSN, Serving GPRS Support Node).
The notion of pool area has been proposed in the 3GPP standard, pool area is meant the zone that a plurality of RAN nodes cover, when subscriber terminal equipment is roamed in pool area, for providing the CN node of service, this subscriber terminal equipment can not change, can reduce like this owing to the CN node changes the more execution number of times of new technological process of the position causes, the Signalling exchange between the minimizing CN node.For providing the CN node of service, subscriber terminal equipment also can be described as service CN node.Subscriber terminal equipment, comprise subscriber equipment (UE, User Equipment) in Wideband Code Division Multiple Access (WCDMA) (WCDMA) system and the travelling carriage (MS, Mobile Station) in GPRS (GPRS) system, for convenience of description, use UE/MS in the follow-up text description.
A pool area provides service concurrently by a plurality of CN nodes usually, also can provide service by a CN node certainly.When a pool area provided service concurrently by a plurality of CN nodes, these CN nodes had just been formed a CN node pool, i.e. MSC pond or SGSN pond.A CN node pool can be simultaneously for a plurality of pool areas provide service, and promptly a CN node pool can be corresponding with a plurality of pool areas.
For CN node of unique identification in a CN node pool, each CN node in the CN node pool is assigned one or more network resource identifier (NRI, Network ResourceIdentifier), and by Operation and Maintenance the NRI that distributes is configured in the CN node, in order to identify the different CN nodes in the CN node pool.When the CN node is that UE/MS distributes Temporary Mobile Subscriber Identity (TMSI, Temporary Mobile Subscriber Identity) or packet TMSI (P-TMSI, Packet Temporary Mobile Subscriber Identity) time, in TMSI/P-TMSI, inserts the NRI of this CN node.Variable-length is the 23rd bit to the 14 bits that the NRI of 0 to 10 bit (bits) is positioned at TMSI/P-TMSI.TMSI is by the CN node of circuit domain, is that MSC is that UE/MS distributes; P-TMSI is by the CN node of packet domain, is that SGSN is that UE/MS distributes.The actual significant bit length of NRI depends on the network planning among the TMSI/P-TMSI, and can pass through operation maintenance center (OMC, Operation and Maintenance Centre) and be configured.
Dispose the corresponding relation between the NRI and each CN node in the CN node pool in each RAN node of a pool area.In the CN node pool, dispose the corresponding relation between NRI and other CN nodes in each CN node.
When UE/MS entered pool area, service CN node carried the NRI of this service CN node in the TMSI/P-TMSI that distributes for UE/MS.In this pool area, when the Non-Access Stratum (NAS, Non-Access Stratum) that UE/MS is established to the CN node at every turn connected, the RAN node routed to CN node corresponding to NRI according to NRI with initial NAS message.Like this, can make UE/MS in a pool area, use same CN node.
Pool area mechanism provides higher flexibility for networking, for further promoting the advantage that pool area mechanism is brought, when the CN node overload, part UE/MS smoothly is transferred to the lower CN node of other loads.This method is, with the CN node is core, when the CN node overload, by this CN node, be that former CN node judges whether UE/MS is transferred to other CN nodes in the CN node pool, is target CN node, shift if desired, then further determine which CN node UE/MS is transferred to, then UE/MS is transferred to corresponding CN node, finish the transfer of the service CN node of UE/MS.
For the WCDMA system, subscriber terminal equipment is UE, and corresponding RAN node is RNC; For gprs system, subscriber terminal equipment is MS, and corresponding RAN node is BSC.
Fig. 1 shows and serves CN node transfer process schematic diagram in the WCDMA system in the prior art packet domain, and as shown in Figure 1, the implementation procedure that the service CN node of UE shifts in the packet domain may further comprise the steps:
Step 101:UE sends position updating request by RNC to the CN node, initiates the position and upgrades.If the MSC in CN node circuit territory, then position updating request is Location Area UpdateRequest, if the CN node is the SGSN of packet domain, then position updating request is Routing AreaUpdate Request.
After step 102:CN node is received position updating request, determine that according to the load state of each CN node in the CN node pool needs are transferred to other CN nodes with UE, the CN node of determining UE need to be shifted away, be that the CN node of receiving position update request is former CN node, the CN node that is about to become UE service CN node is a target CN node, former CN node is UE distribution T MSI/P-TMSI, the NRI that includes target CN node among this TMSI/P-TMSI, promptly the 23rd bit to the 14 bits of this TMSI/P-TMSI are the NRI of target CN node.
Step 103: former CN node sends the position by RNC to UE and upgrades response, this position is upgraded and is carried the new TMSI/P-TMSI that former CN node distributes in the response, non-broadcast location area (the LAI that also carries in the response corresponding to target CN node is upgraded in this position, Location Area Identity) or Routing Area Identifier (RAI, Routing Area Identity).In the CN node pool, each CN node configuration has the special LAI/RAI that does not broadcast in system message, can be referred to as non-broadcasting LAI/RAI, each CN node all disposes the non-broadcasting LAI/RAI of other CN nodes and the corresponding relation between the CN node address, and the CN node address can be CN node global identity (Global CN-ID), IP address and signalling point address.If the CN node is the MSC of circuit domain, then the position is upgraded to respond and is LocationArea Update Accept, if the CN node is the SGSN of packet domain, then the position is upgraded to respond and is Routing Area Update Accept.
After step 104:UE receives that response is upgraded in the position, whether judgement is upgraded the non-broadcasting LAI/RAI that carries in responding corresponding to LAI/RAI and the position of the TMSI/P-TMSI of storage consistent, if inconsistent, then show UE needs executing location new technological process more once more, serve the CN node and shift.UE sends direct-sending message (INITIAL DIRECT TRANSFER) to RNC, the routing parameter that carries in this direct-sending message is the NRI of target CN node, the non-access layer information that carries in this direct-sending message (NAS Message) is a position updating request, also carries the LAI/RAI corresponding to former CN node in this direct-sending message; If consistent, show that then UE does not need to serve the CN node and shifts, do not carry out any operation.
After step 105:RNC receives direct-sending message, according to routing parameter NRI with non-access layer information
(being the position update inquiry information) routes to target CN node, carries the non-broadcasting LAII/RAI of former CN node in the location update request message.
Step 106～step 107: after target CN node is received position updating request, determine former CN address of node, send UE context request (UE Context Request) to former CN node then according to non-broadcasting LAI/RAI corresponding to former CN node; After former CN node is received the UE context request, return UE context response (UE Context Response) to target CN node, carry the UE context in this UE context response, make target CN node can obtain the context of UE by former CN node, the context transfer of UE to target CN node, is finished the transfer of the service CN node of UE.The context of UE is meant the general name of UE all relevant informations in the CN node, and the context of UE comprises sign, the state of UE, the address and the relevant parameter of each interface at least, or the like.
Step 108: after target CN node is received the UE context response, upgrade response to the UE home position, notice UE completing place upgrades.
Be that example describes only below with the transfer of the service CN node of UE in the packet domain, the processing procedure that the service CN node of UE shifts in circuit domain and the packet domain is basic identical, maximum difference is: owing to do not relate to the contextual transfer of UE in the circuit domain, therefore, do not comprise the treatment step of UE context transfer in the transfer process of service CN node in the circuit domain to target CN node.
According to above description as seen, when needs are served the transfer of CN node, be UE distribution T MSI/P-TMSI by former CN node, include the NRI of target CN node among this TMSI/P-TMSI.In the CN node pool, each CN node all might become the target CN node that other CN nodes are selected, like this, for avoiding two CN nodes to distribute the TMSI/P-TMSI that repeats, the TMSI/P-TMSI resource must be between former CN node and target CN node, be to carry out preassignment between any two CN nodes in the CN node pool, thereby cause the waste of TMSI/P-TMSI resource; The TMSI/P-TMSI resource of a CN node need be carried out preassignment according to the CN number of nodes in the CN node pool, be that CN number of nodes in the CN node pool is many more, it is just many more that the TMSI/P-TMSI resource of a CN node is carried out preallocated umber, causes the waste of this TMSI/P-TMSI resource just serious more.The TMSI/P-TMSI that former CN node distributes is the TMSI/P-TMSI that belongs to target CN node, behind the service CN node of target CN node as UE, if in the subsequent process, this TMSI/P-TMSI does not re-use, target CN node must notify former CN node to discharge this TMSI/P-TMSI, the transfer flow more complicated of this feasible service CN node; If target CN node does not notify former CN node to discharge this TMSI/P-TMSI, then this TMSI/P-TMSI resource will be fallen extremely, make this TMSI/P-TMSI to be reused, and the TMSI/P-TMSI resource of a CN node is caused further waste.
In addition, in the CN node pool, the corresponding relation between the non-broadcasting LAI/RAI that each CN node need dispose all CN nodes and the CN node address makes too complexity of the data that dispose in the CN node.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method that realizes that service core network node shifts, make that the transfer process of service CN node is more reasonable, effectively simple more.
In order to achieve the above object, the invention provides a kind of method that realizes that service core network node shifts, in the time of need carrying out the transfer of service core network CN node for subscriber terminal equipment, the method includes the steps of:
A, former CN node select target CN node, and request target CN node is that subscriber terminal equipment distributes temporary mark;
Wherein, described former CN node select target CN node comprises:
The load state of each CN node in the network is divided into a plurality of load level, and when the load level of CN node changed, CN node other each node beyond self sent self load condition; Described former CN node is according to the load state select target CN node of each the CN node that receives;
Perhaps, the load information center is set in network, each the CN node in the network sends self load condition or load level to described load information center, and store the load state or the load level of the CN node received at the load information center; Described former CN node by with the load state or the load level of knowing other CN node beyond self alternately at described load information center, and according to the load state or the load level select target CN node of described other CN node;
B, target CN node are that subscriber terminal equipment distributes temporary mark, and provide this temporary mark to subscriber terminal equipment.
In the packet domain, further comprise step C after the described step B: former CN node provides the context of subscriber terminal equipment to target CN node, and target CN node is stored the context of this subscriber terminal equipment.
Further comprise between described step B and the described step C: former CN node receives the position renewal of subscriber terminal equipment transmission and finishes message.
Further comprise before the described step C: the former CN node of target CN node request provides the context of subscriber terminal equipment.
In the packet domain, when former CN node is carried out described steps A, further provide the context of subscriber terminal equipment, further comprise after the described steps A: the context of target CN node storage subscriber terminal equipment to target CN node.
After the context of described target CN node storage subscriber terminal equipment, further comprise step e: target CN node notify former CN node with the context transfer of subscriber terminal equipment to target CN node.
Further comprise after the described step e: the context and the relevant information of former CN knot removal subscriber terminal equipment.
Described step B further comprises: target CN node provides and the corresponding station location marker of temporary mark to subscriber terminal equipment; Further comprise after the described step B: subscriber terminal equipment storage temporary mark, and the corresponding relation between temporary mark and the station location marker.
Provide temporary mark to be to subscriber terminal equipment described in the step B: former CN node is carried at temporary mark to the position that subscriber terminal equipment sends and upgrades in the response.
Described target CN node is the network resource identifier NRI that includes target CN node in the temporary mark that distributes of subscriber terminal equipment.
Described subscriber terminal equipment is the user equipment (UE) in the Wideband Code Division Multiple Access (WCDMA) WCDMA system, also can be the mobile station MS in the General Packet Radio Service System gprs system.
According to the proposed method, in the time of need serving the transfer of CN node for subscriber terminal equipment, former CN node request target CN node is that subscriber terminal equipment distributes temporary mark, target CN node is that subscriber terminal equipment distributes temporary mark according to the request of former CN node, and provides this temporary mark to subscriber terminal equipment; In packet domain, further comprise: with the context transfer of subscriber terminal equipment to target CN node, like this, the pairing temporary mark resource of specific routing parameter is carried out centralized control and distribution by the CN node corresponding to routing parameter, need not the temporary mark resource is carried out preassignment between the CN node, effectively avoided waste to the temporary mark resource, and some treatment steps in the existing service CN node transfer process have been simplified, make that the transfer flow of service CN node is effectively simple, also more reasonable more.
Because according to the proposed method, in the service CN node transfer process of subscriber terminal equipment, former CN node needn't provide the non-broadcasting LAI/RAI of target CN node to subscriber terminal equipment, therefore, need not in the CN node to dispose the position data of other CN nodes in the CN node pool and the corresponding relation between the CN node address, make the data that dispose in the CN node simplify greatly.
Description of drawings
Fig. 1 shows service CN node transfer process schematic diagram in the prior art packet domain;
Fig. 2 shows that first embodiment serves CN node transfer process schematic diagram in the packet domain of the present invention;
Fig. 3 shows that second embodiment serves CN node transfer process schematic diagram in the packet domain of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Among the present invention, in the time of need serving the transfer of CN node for subscriber terminal equipment, former CN node request target CN node is that subscriber terminal equipment distributes temporary mark, target CN node is that subscriber terminal equipment distributes temporary mark according to the request of former CN node, and provides this temporary mark to subscriber terminal equipment.In packet domain, further comprise: with the context transfer of subscriber terminal equipment to target CN node.Described temporary mark can be TMSI, also can be P-TMSI.Subscriber terminal equipment can be the travelling carriage (MS) in GPRS (GPRS) system, also can be the UE in Wideband Code Division Multiple Access (WCDMA) (WCDMA) system, below subscriber terminal equipment is described as UE/MS.
Fig. 2 shows that first embodiment serves CN node transfer process schematic diagram in the packet domain of the present invention, and as shown in Figure 2, the implementation procedure that the service CN node of UE/MS shifts in the packet domain may further comprise the steps:
Step 201:UE/MS sends position updating request by the RAN node to the CN node, initiates the position and upgrades.If the MSC in CN node circuit territory, then position updating request is Location AreaUpdate Request, if the CN node is the SGSN of packet domain, then position updating request is RoutingArea Update Request.
After step 202:CN node is received position updating request, determine that according to the load state of each CN node in the CN node pool needs are transferred to other CN nodes with UE/MS, and definite target CN node, former CN node sends the temporary mark request for allocation to target CN node, and request GB CN node is that UE/MS distributes temporary mark.
Step 203: after target CN node is received the temporary mark request for allocation, for UE/MS distributes temporary mark, include the routing parameter of target CN node in this temporary mark, as NRI, return the temporary mark assignment response to former CN node then, carrying target CN node in this temporary mark assignment response is the temporary mark that UE/MS distributes, and can further carry in this temporary mark assignment response with the corresponding station location marker of temporary mark, as LAI/RAI.Like this, need not to dispose the position data of other CN nodes in the CN node among the present invention,, make the data that dispose in the CN node simplify greatly as the corresponding relation between non-broadcasting LAI/RAI and the CN node address.
Step 204: after former CN node is received the temporary mark assignment response, upgrade response to the UE/MS home position, this position is upgraded and is carried the temporary mark that target CN node is the UE/MS distribution in the response.Corresponding with the temporary mark assignment response that former CN node is received, if carry station location marker corresponding to temporary mark in the temporary mark assignment response, then the station location marker that can further carry in the response corresponding to temporary mark is upgraded in this position.If the MSC in CN node circuit territory, then the position is upgraded to respond and is Location Area Update Accept, if the CN node is the SGSN of packet domain, then the position is upgraded to respond and is Routing Area Update Accept.
After step 205:UE/MS receives that response is upgraded in the position, only carry the temporary mark that target CN node distributes in the response if this position is upgraded, then UE/MS stores this temporary mark; If upgrading, this position not only carries the temporary mark that target CN node distributes in the response, also carry station location marker corresponding to temporary mark, then UE/MS not only stores this temporary mark, also store corresponding station location marker, promptly store the corresponding relation of temporary mark and station location marker, UE/MS upgrades to former CN node home position and finishes message then, notifies former CN node to upgrade the completing place.If the MSC in CN node circuit territory, then the position upgrades that to finish message be Location Area Update Complete, if the CN node is the SGSN of packet domain, then the position upgrades that to finish message be Routing Area UpdateComplete.
Step 206: after former CN node receives that message is finished in the position renewal, send context transfer request to target CN node, carrying target CN node in this context transfer request is temporary mark and the UE/MS context that UE/MS distributes, and makes target CN node can obtain the context of UE/MS by former CN node.The context of UE/MS is meant the general name of UE/MS all relevant informations in the CN node, and the context of UE/MS comprises sign, the state of UE/MS, the address and the relevant parameter of each interface at least, or the like.
Step 207: after target CN node is received context transfer request, the UE/MS context is stored, finish the transfer of the service CN node of UE/MS, return context transfer response to former CN node then, notify former CN node with the context transfer of UE/MS to target CN node.After former CN node is received the context transfer response, context and the relevant information of deletion UE/MS.
Be to initiate the contextual transfer of UE/MS by former CN node among Fig. 2, in fact also can initiate the contextual transfer of UE/MS by target CN node, promptly target CN node sends context transfer request to former CN node; After former CN node is received context request, return the context transfer response to target CN node, carrying target CN node in this context transfer response is temporary mark and the UE/MS context that UE/MS distributes; Target CN node is stored the UE/MS context after receiving context transfer response, and the context transfer of UE/MS to target CN node, is finished the transfer of the service CN node of UE/MS.
Fig. 3 shows that second embodiment serves CN node transfer process schematic diagram in the packet domain of the present invention, and as shown in Figure 3, the implementation procedure that the service CN node of UE/MS shifts in the packet domain may further comprise the steps:
Step 301:UE/MS sends position updating request by the RAN node to the CN node, initiates the position and upgrades.If the MSC in CN node circuit territory, then position updating request is Location AreaUpdate Request, if the CN node is the SGSN of packet domain, then position updating request is RoutingArea Update Request.
After step 302:CN node is received position updating request, determine that according to the load state of each CN node in the CN node pool needs are transferred to other CN nodes with UE/MS, and definite target CN node, former CN node sends the temporary mark request for allocation to target CN node, request target CN node is that UE/MS distributes temporary mark, carries the UE/MS context in this temporary mark request for allocation.
Step 303: after target CN node is received the temporary mark request for allocation, for UE/MS distributes temporary mark, the routing parameter that includes target CN node in this temporary mark, as NRI, and the UE/MS context stored, with the context transfer of UE/MS to target CN node, return the temporary mark assignment response to former CN node then, notify former CN node with the context transfer of UE/MS to target CN node, carrying target CN node in this temporary mark assignment response is the temporary mark that UE/MS distributes, and can further carry in this temporary mark assignment response and the corresponding station location marker of temporary mark.
Step 304: after former CN node is received the temporary mark assignment response, upgrade response to the UE/MS home position, this position is upgraded and is carried the temporary mark that target CN node is the UE/MS distribution in the response, finishes the transfer of the service CN node of UE/MS.Corresponding with the temporary mark assignment response that former CN node is received, if carry in the temporary mark assignment response and the corresponding station location marker of temporary mark, then this position is upgraded and can further be carried the relevant position sign in the response.If the MSC in CN node circuit territory, then the position is upgraded to respond and is Location Area Update Accept, if the CN node is the SGSN of packet domain, then the position is upgraded to respond and is Routing Area Update Accept.
After step 305:UE/MS receives that response is upgraded in the position, only carry the temporary mark that target CN node distributes in the response if this position is upgraded, then UE/MS stores this temporary mark; If upgrading, this position not only carries the temporary mark that target CN node distributes in the response, also carry station location marker corresponding to temporary mark, then UE/MS not only stores this temporary mark, also store corresponding station location marker, promptly store the corresponding relation between temporary mark and the station location marker, UE/MS upgrades to former CN node home position and finishes message then, notifies former CN node to upgrade the completing place.After former CN node receives that message is finished in the position renewal, context and the relevant information of deletion UE/MS.If the MSC in CN node circuit territory, then the position upgrades that to finish message be Location Area Update Complete, if the CN node is the SGSN of packet domain, then the position upgrades that to finish message be Routing Area UpdateComplete.
Be that example describes only below with the transfer of the service CN node of UE/MS in the packet domain, the processing procedure that the service CN node of UE/MS shifts in circuit domain and the packet domain is basic identical, maximum difference is: owing to do not relate to the UE/MS context in the circuit domain, therefore, do not comprise the treatment step of UE/MS context transfer in the transfer process of service CN node in the circuit domain to target CN node.
Each CN node other CN nodes in the CN node pool send self load condition in the CN node pool, and like this, the CN node just can be known the load state of each CN node in the CN node pool.For avoiding a certain CN node frequently to send self load condition to other CN nodes, the load state of CN node can be divided into a plurality of load level, as present load be full load below 10% for load level 0, present load is that 10% to 20% of full load is load level 1, or the like, when the load level of CN node changed, this CN node just sent self load condition to other CN nodes.Also the load information center can be set in network, the CN node sends self load condition or load level to the load information center, store the load state or the load level of the CN node received at the load information center, the CN node by with the load state of knowing other CN nodes alternately or the load level at load information center.
If CN can be known the concrete load state of other CN nodes in the CN node pool, can select the minimum CN node of present load as the service CN node of UE/MS, be target CN node.If the CN node can only be known the load level of other CN nodes, and the concrete load state that load level is represented the CN node from high to low from high to low, and then former CN node can select the minimum CN node of present load rank as target CN node.All UE/MS select the minimum CN node of load level in a period of time in order to avoid, cause the load of this CN node sharply to rise, can the different choice probability be set at the different loads rank, for example, the selection probability of load level 0 is 70%, and the selection probability of load level 1 is 30%, or the like, corresponding one of different loads rank is selected probability, and this selection probability changes with other change of CN node load level.If the current selection probability of certain CN node is 70%, then former CN node is according to CN node load situation select target CN node the time, at first generate a decimal at random, if this at random decimal between 0 to 0.7, then this CN node will be chosen the node as target CN by former CN node, like this, can make the load of CN node rise milder, the CN node of high capacity still have by RNC choose may, be that selected probability is smaller.
More than be example to all initiating with former CN node that service CN node shifts in the description of service CN node transfer flow, in fact, the service CN node transfer flow that the present invention proposes can be applicable to the situation that any generation service CN node shifts.
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (11)
1, a kind of method that realizes that service core network node shifts is characterized in that, in the time of need carrying out the transfer of service core network CN node for subscriber terminal equipment, the method includes the steps of:
A, former CN node select target CN node, and request target CN node is that subscriber terminal equipment distributes temporary mark;
Wherein, described former CN node select target CN node comprises:
The load state of each CN node in the network is divided into a plurality of load level, and when the load level of CN node changed, CN node other each node beyond self sent self load condition;
Described former CN node is according to the load state select target CN node of each the CN node that receives;
Perhaps, the load information center is set in network, each the CN node in the network sends self load condition or load level to described load information center, and store the load state or the load level of the CN node received at the load information center;
Described former CN node by with the load state or the load level of knowing other CN node beyond self alternately at described load information center, and according to the load state or the load level select target CN node of described other CN node;
B, target CN node are that subscriber terminal equipment distributes temporary mark, and provide this temporary mark to subscriber terminal equipment.
2, method according to claim 1 is characterized in that, in the packet domain, further comprises after the described step B:
C, former CN node provide the context of subscriber terminal equipment to target CN node, and target CN node is stored the context of this subscriber terminal equipment.
3, method according to claim 2 is characterized in that, further comprises between described step B and the described step C: former CN node receives the position renewal of subscriber terminal equipment transmission and finishes message.
4, method according to claim 2 is characterized in that, further comprise before the described step C: the former CN node of target CN node request provides the context of subscriber terminal equipment.
5, method according to claim 1 is characterized in that, in the packet domain, when former CN node is carried out described steps A, further provides the context of subscriber terminal equipment to target CN node,
Further comprise after the described steps A: the context of target CN node storage subscriber terminal equipment.
6, method according to claim 2 is characterized in that, after the context of described target CN node storage subscriber terminal equipment, further comprises:
E, target CN node notify former CN node with the context transfer of subscriber terminal equipment to target CN node.
7, method according to claim 6 is characterized in that, further comprises after the described step e: the context and the relevant information of former CN knot removal subscriber terminal equipment.
8, method according to claim 1 is characterized in that,
Described step B further comprises: target CN node provides and the corresponding station location marker of temporary mark to subscriber terminal equipment;
Further comprise after the described step B: subscriber terminal equipment storage temporary mark, and the corresponding relation between temporary mark and the station location marker.
9, method according to claim 1 is characterized in that, provides temporary mark to be to subscriber terminal equipment described in the step B: former CN node is carried at temporary mark to the position that subscriber terminal equipment sends and upgrades in the response.
10, method according to claim 1 is characterized in that, described target CN node is the network resource identifier NRI that includes target CN node in the temporary mark that distributes of subscriber terminal equipment.
11, method according to claim 1 is characterized in that, described subscriber terminal equipment is the user equipment (UE) in the Wideband Code Division Multiple Access (WCDMA) WCDMA system, also can be the mobile station MS in the General Packet Radio Service System gprs system.
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| CN1878101A (en) | 2006-12-13 |
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