CN102238674A - Service switching method and equipment from PS (Packet Switched) domain to 2G/3G network - Google Patents
Service switching method and equipment from PS (Packet Switched) domain to 2G/3G network Download PDFInfo
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- CN102238674A CN102238674A CN2010101653882A CN201010165388A CN102238674A CN 102238674 A CN102238674 A CN 102238674A CN 2010101653882 A CN2010101653882 A CN 2010101653882A CN 201010165388 A CN201010165388 A CN 201010165388A CN 102238674 A CN102238674 A CN 102238674A
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Abstract
The embodiment of the invention discloses a service switching method and equipment from a PS (Packet Switched) domain to a 2G/3G network. By applying the technical scheme of the embodiment, UE (User Equipment) without PS domain data service, especially idle UE in an MT (Mobile Terminated) call, can perform SRB-Only PS HO if the network allows, so that the time delay of CSFB is reduced. In addition, control can be performed at the SGSN (Service GPRS Supporting Node) level according to the strategy deployment of an operator.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of PS territory is to the business switch method and the equipment of 2G/3G network.
Background technology
In the prior art, a kind of method that can optimize CSFB (Circuit Switched Fallback, circuit switched fallback mechanism) flow process has been proposed.As UE (User Equipment, subscriber equipment) at E-UTRAN (Evolved Universal Terrestrial Radio Access Network, when Universal Terrestrial Radio Access Network evolution) keeping connected state in the network, use CS (Circuit Switched if desired, circuit switching) the language business in territory, then UE need be degenerated to 2G (Second Generation, second generation mobile communication technology)/3G (Third Generation, the 3G (Third Generation) Moblie technology) network, and PS (PacketSwitched, packet switching) business in territory also needs HO (Handover, switch) to the 2G/3G network,, save access network resource in order to reduce switching delay in the CSFB process, the CSFB flow process has been described and has a kind ofly been degenerated to the method for 2G/3G network from LTE (Long Term Evolution, Long Term Evolution) network.
When UE is in the LTE network, UE can only use the speech business in PS territory, be IMS Voice (IPMultimedia Subsystem Voice, the IP Multimedia System speech business), yet, have the LTE network now and might not all support IMS Voice, perhaps UE does not possess the ability of IMS Voice, therefore, may need to allow UE be linked into the 2G/3G network again, use the speech business in CS territory.
Existing E-UTRAN system is to UTRAN (Universal Terrestrial Radio Access, whole world terrestrial radio access) the visible TS23.4015.5.2.1 of PS HO process of system, whole process has been finished the switching of signaling plane and user's face, and SRB (Signalling Radio Bearer, Signaling Radio Bearer)-the PS HO of Only proposes only to carry out the switching of signaling plane, do not carry out the switching of user's face, reduced user plane bearer settling time, so can reduce the delay of CSFB.
The method of existing SRB-Only PS HO is as follows, as depicted in figs. 1 and 2:
Wherein, in step S102, the SourceRNC-ToTargetRNC-TransparentContainer of Source eNB in giving the Handover Required message of Source MME carries any CSFBindication.
In step S105, content among the SourceRNC-ToTargetRNC-TransparentContainer can not handled by core net, only can arrive Target RNC just can be resolved, Target RNC only is with SRB information in giving the TargetRNC-ToSourceRNC-TransparentContainer of SourceeNB, and, from returning to the Relocation Request ACK message of Target SGSN, Target RNC do not carry any RAB information that will set up not with the information of any DRB (Data Radio Bearer).
On the other hand, in step S201, Source MME comprises all E-RAB information in " the E-RABs to Release List " of Handover Command message IE;
In step S202, Source eNB receives TargetRNC-ToSourceRNC-TransparentContainer, obtains SRB information, and then indication UE only sets up SRB with Target RNC in giving the HO from E-UTRAN Command message of UE.
In the process that realizes the embodiment of the invention, the applicant finds that there is following problem at least in prior art:
In the prior art,, need all Target RNC of upgrading in order to support SRB-Only PS HO.But because in the communication network of reality, the RNC interstitial content is more, therefore, whether Control Network supports SRB-Only PS HO convenient inadequately on RNC.
Summary of the invention
The embodiment of the invention provides business switch method and the equipment of a kind of PS territory to the 2G/3G network, realizes that terminal equipment is switched to the business of 2G/3G network by the PS territory.
For achieving the above object, the embodiment of the invention provides the business switch method of a kind of PS territory to the 2G/3G network on the one hand, comprising:
Whether comprise SRB-OnlyPS HO indication information in the RELOCATION REQUEST message that the MME that the SGSN judgement receives sends;
If comprise, described SGSN judges self whether to support SRB-Only PS HO function;
If support, the pairing terminal equipment of RELOCATION REQUEST message that described SGSN sends the described MME that receives carries out the PS territory and switches to the business of 2G/3G network.
On the other hand, the embodiment of the invention also provides a kind of SGSN, comprising:
Communication module is used to receive the RELOCATION REQUEST message that MME sends;
Judge module is used for judging whether the RELOCATION REQUEST message that the received MME of described communication module sends comprises SRB-Only PS HO indication information;
The function identification module is used for when described judge module judges that described RELOCATION REQUEST message comprises SRB-Only PS HO indication information, judges whether described SGSN supports SRB-Only PS HO function;
Handover module is used for when described function identification module judges that described SGSN supports SRB-Only PSHO function, and the pairing terminal equipment of RELOCATION REQUEST message that the described MME that receives is sent carries out the business switching of PS territory to the 2G/3G network.
On the other hand, the embodiment of the invention also provides a kind of base station, comprising:
Module is set, is used to be provided with and judges whether terminal equipment can use the strategy of SRB-Only PS HO function;
Receiver module is used for the handoff request message that receiving terminal apparatus sends;
Judge module is used for according to the described set strategy of module that is provided with, and judges whether described terminal equipment can use SRB-Only PS HO function;
Sending module, be used for when described judge module judges that described terminal equipment can be used SRB-Only PSHO function, send the handoff request message that comprises SRB-Only PS HO indication information to described MME, also be used for when described judge module judges that described terminal equipment cannot be used SRB-Only PS HO function, send the handoff request message that does not comprise SRB-Only PS HO indication information to described MME.
Compared with prior art, the embodiment of the invention has the following advantages:
By using the technical scheme of the embodiment of the invention, make and do not have the UE of PS domain data service, particularly carry out the Idle state UE of MT call, under the situation that network allows, can carry out SRB-Only PSHO, thereby reduce the time delay of CSFB, in addition, can on the SGSN rank, control by the policy deployment according to operator in the method.
Description of drawings
Fig. 1 does the schematic flow sheet of the HO preparatory stage in the scene of PS HO for E-UTRAN in the prior art to UTRAN;
Fig. 2 does the schematic flow sheet of the HO implementation phase in the scene of PS HO for E-UTRAN in the prior art to UTRAN;
The schematic flow sheet of the business switch method of 2G/3G network in base station side arrived in a kind of PS territory that Fig. 3 proposes for the embodiment of the invention;
The signalling diagram of the business switch method of 2G/3G network is arrived in a kind of PS territory that Fig. 4 proposes for the embodiment of the invention;
The schematic flow sheet of the business switch method of 2G/3G network is arrived in a kind of PS territory that Fig. 5 proposes for the embodiment of the invention;
The signalling diagram of the business switch method of 2G/3G network is arrived in a kind of PS territory that Fig. 6 proposes for the embodiment of the invention;
A kind of E-UTRAN that Fig. 7 proposes for the embodiment of the invention does the schematic flow sheet of the HO preparatory stage in the scene of PS HO to UTRAN;
A kind of E-UTRAN that Fig. 8 proposes for the embodiment of the invention does the schematic flow sheet of the HO execution phase in the scene of PS HO to UTRAN;
Fig. 9 is the structural representation of a kind of RNC of embodiment of the invention proposition;
Figure 10 is the structural representation of a kind of SGSN of embodiment of the invention proposition;
Figure 11 is the structural representation of a kind of base station of embodiment of the invention proposition.
Embodiment
In order to solve problems of the prior art, the embodiment of the invention replaces RNC by SGSN and carries out switchover policy control, thereby avoid the thinking of RNC upgrading based on by upgrading SGSN, provides the business switch method of a kind of PS territory to the 2G/3G network.
As shown in Figure 3, a kind of PS territory that proposes for the embodiment of the invention is characterized in that to the business switch method of 2G/3G network, comprising:
Step S301, RNC judge whether the transparent vessel Source-RNC-to-Target-RNC-Transparent Container that receives comprises SRB-Only PS HO indication information.
If comprise, execution in step S302;
If do not comprise, then handle according to corresponding strategy.
Step S302, described RNC carry out SRB-Only PS HO operation to the pairing terminal equipment of described transparent vessel.
Wherein, described Source-RNC-to-Target-RNC-Transparent Container is specially:
The transparent vessel Source-RNC-to-Target-RNC-TransparentContainer that the base station sends to Target RNC.
Further, described RNC judges in the specify message that receives whether comprise before the SRB-Only PS HO indication information, also comprise:
Described base station determines whether to increase SRB-Only PS HO indication according to predetermined strategy in described Source-RNC-to-Target-RNC-Transparent Container.
Wherein, described preset strategy specifically comprises:
The state of described terminal equipment before handover operation is carried out in request;
Data flow state in the current system;
Default terminal equipment can be used the trigger condition of SRB-Only PS HO function.
In conjunction with concrete application scenarios, as can be seen, above-mentioned technical scheme is made optimization on existing SRB-Only PSHO method basis, specifically as shown in Figure 4:
Source eNB is according to the state of UE before CSFB, current data flow state, and configured strategy etc., whether decision increases SRB-Only PS HO indication in Source-RNC-to-Target-RNC-Transparent Container, (existing method is only to carry the CSFB indication), for example UE be from the Idle attitude by CSFB, perhaps UE is current does not have a transfer of data, then Source eNB may initiate SRB-Only PS HO according to configured strategy.
Target RNC is SRB-Only PS HO after receiving SRB-Only PS HO indication among the Source-RNC-to-Target-RNC-Transparent Container that Source eNB transmits immediately.
As shown in Figure 5, a kind of PS territory that proposes for the embodiment of the invention is to the schematic flow sheet of the business switch method of 2G/3G network, and this method specifically may further comprise the steps:
Comprise SRB-Only PS HO indication information or CSFB indication information in the RELOCATION REQUEST message that the MME that step S501, SGSN judgement receives sends;
Whether comprise before SRB-Only PS HO indication information or the CSFB indication information in the RELOCATION REQUEST message that the MME that described SGSN judgement receives sends, specifically comprise:
Described base station judges whether to use SRB-Only PS HO function according to preset strategy;
If of course, described base station sends the handoff request message that comprises SRB-Only PS HO indication information to described MME, if cannot, described base station sends the handoff request message that comprises the CSFB indication information to described MME;
If described MME receives the handoff request message that comprises SRB-Only PS HO indication information, the RELOCATION REQUEST message that then comprises described SRB-Only PS HO indication information to described SGSN, if described MME receives the handoff request message that comprises the CSFB indication information, then send the RELOCATION REQUEST message that comprises the CSFB indication information to described SGSN.
Wherein, described preset strategy specifically comprises:
The state of described terminal equipment before handover operation is carried out in request;
Data flow state in the current system;
Default terminal equipment can be used the trigger condition of SRB-Only PS HO function.
Step S502, according to the result of described judgement, described SGSN determines that according to predetermined strategy the professional type of switching is SRB-Only PS HO or Full PS HO, is specially:
When comprising SRB-Only PS HO indication information in the RELOCATION REQUEST message of the MME transmission that described SGSN judgement receives, described SGSN is according to default operation strategy and the ability information of self, judge and self whether support SRB-Only PS HO function, if support, determine that then the professional type of switching is SRB-Only PS HO, if do not support, determine that then the professional type of switching is Full PSHO;
When comprising the CSFB indication information in the RELOCATION REQUEST message of the MME transmission that described SGSN judgement receives, described SGSN is transmitted to Target RNC with this indication, represents that professional switching type is FullPS HO.
Step S503, described SGSN carry out the PS territory according to the determined professional type of switching to the pairing terminal equipment of described RELOCATION REQUEST message and switch to the business of 2G/3G network.
When described SGSN determined that the professional type of switching is SRB-Only PS HO, the processing procedure of this step was specially:
Described SGSN sends RELOCATION REQUEST message to RNC, and receive the relocation response message that described RNC returns, comprise the indication information that the described RNC of indication does not set up RAB in the described RELOCATION REQUEST message, simultaneously, if do not comprise any DRB information in the relocation response message that described SGSN receives, then described SGSN sends relocation response message to described MME, notify the business switching of described MME Access Network side to finish, comprise the Indication message that SRB-Only PS HO function is activated in the described relocation response message, otherwise described SGSN determines that the professional type of switching is Full PS HO;
Described SGSN sends the bearing modification request to SGW, and the F-TEID of the described RNC that is comprised in the described bearing modification request puts 0.
When described SGSN determined that the professional type of switching is Full PS HO, the processing procedure of this step specifically comprised:
Described SGSN sends RELOCATION REQUEST message to RNC, carries the CSFB indication;
Described RNC judges currently whether have enough resources and set up all DRB;
If do not have, described RNC uses the professional switching type of SRB-Only PS HO to carry out the business switching automatically, and return to described SGSN and not comprise any DRB information relocation response message, this moment, described SGSN comprised the indication information that SRB-Only PS HO function is activated in the relocation response message that described MME sends;
If have, described RNC returns relocation response message to described SGSN and confirms that the professional switching type of described SGSN application Full PS HO carries out business and switches.
After executing this step, continue to handle according to existing procedure.
Compared with prior art, the embodiment of the invention has the following advantages:
By using the technical scheme of the embodiment of the invention, make and do not have the UE of PS domain data service, particularly carry out the Idle state UE of MT call, under the situation that network allows, can carry out SRB-Only PSHO, thereby reduce the time delay of CSFB, in addition, can on the SGSN rank, control by the policy deployment according to operator in the method.
Below, the application scenarios in conjunction with concrete describes the technical scheme that the embodiment of the invention proposed.
A kind of PS territory that the embodiment of the invention proposed specifically may further comprise the steps to the business switch method of 2G/3G network:
Source eNB is according to the state of UE before CSFB, current data flow state, and configured strategy etc., and whether decision increases is carried SRB-Only PS HO indication or CSFB indicates to SourceMME.
For example UE be from the Idle attitude by CSFB, perhaps UE is current does not have a transfer of data, then Source eNB may initiate SRB-Only PS HO according to configured strategy.
If decision is carried, then Source MME passes to Target SGSN with SRB-Only PS HO indication or CSFB indication.
If do not carry, then handle according to existing procedure.
The type of the indication information of receiving according to Target SGSN, described SGSN determines that according to predetermined strategy the professional type of switching is SRB-Only PS HO or Full PS HO.
If Target SGSN receives SRB-Only PS HO indication, then Target SGSN can be according to the strategy of operator and the ability of self, and whether decision supports SRB-Only PS HO.
Wherein, if the version of SGSN is lower, just can not discern the indication of SRB-Only PS HO, therefore, self-ability also is important basis for estimation.
If Target SGSN supports SRB-Only PS HO, then SRB-Only PS HO is carried out in decision;
If do not support, then ignore the indication of the SRB-Only PS HO of Source MME transmission, follow-up flow process is all pressed existing procedure and is handled.
If Target SGSN receives CSFB indication, then according to the strategy of operator, the service attribute that the ability of UE and user contract, decision is to carry out SRB-Only PS HO or Full PS is HO.
If SRB-Only PS HO is carried out in decision, then Target SGSN does not ask RNC to set up RAB, simultaneously also not request target S-GW set up Indirect Data Forwarding Tunnel.
Otherwise carry out Full PS HO process, indicating this PS HO of target RNC simultaneously is for CSFB.
If SRB-Only PS HO is carried out in Target SGSN decision, then target RNC handles by existing procedure; If Target SGSN indication target RNC carries out Full PS HO, then target RNC judges according to resource situation whether Full PS HO can carry out, if inadequate resource is then only set up SRB, return normal response message simultaneously, any DRB information is not carried in the message the inside.
If be not with any DRB information in the Relocation Request Acknoledge message that Target SGSN finds to receive, then indicate Source MME, SRB-Only PS HO activates, Source MME sets up Indirect Data Forwarding Tunnel without request source S-GW like this, otherwise pressing Full PS HO handles, carry out existing procedure, be not with any indication.
So far, finish the switching of Access Network side, i.e. the handoff preparation phase of terminal equipment.After this TargetSGSN is in issuing the Modify Bearer Request message of SGW, and the F-TEID of RNC is put 0.
Its signalling diagram as shown in Figure 6.
In conjunction with existing technical finesse flow process, the realization flow of the technical scheme that the embodiment of the invention proposed in concrete application scenarios specifies as follows as shown in Figure 7 and Figure 8:
Shown in 7 figure, for E-UTRAN does HO preparatory stage in the scene of PS HO to UTRAN, i.e. the switch step of Access Network side specifically may further comprise the steps:
Step S701, UE send handoff request to Source eNB.
Step S702, Source eNB identification UE can carry out SRB-Only PS HO, sends the Handover Required message of carrying SRB-Only PS HO indication or CSFB indication to SourceMME.
For example: do not have transfer of data between UE and the Source eNB this moment, perhaps UE from the Idle attitude by CSFB, then under the situation that strategy allows, Source eNB increases in Handover Required message and carries SRB-Only PS HO and indicate the MME to Source, and other guide is the same with existing procedure in the Handover Required message.
Step S703, Source MME increase in Forward Relocation Request and carry SRB-Only PS HO and indicate the SGSN to Target.
Forward Relocation Request other guide is the same with existing procedure.
Step S704 is normal existing procedure.
If step S705 Target SGSN receives SRB-Only PS HO/CSFB indication, need be according to the strategy of operator, the ability of UE ability and signatory attribute and network judges whether to need to carry out SRB-Only PS HO, if desired, then Target SGSN puts sky with RAB to Be Setup List in Relocation Request message, RAB is not set up in indication, and RNC can not reserve any RAB resource like this.Otherwise,, indicate RNC to target but need increase CSFB in Relocation Request message then according to existing flow processing.
If target RNC receives the CSFB indication, then judge according to resource situation whether Full PS HO can carry out, if inadequate resource then carries out SRB-Only PS HO, return normal response message simultaneously, any DRB information is not carried in the message the inside.
If be not with any DRB information in the Relocation Request Acknoledge message that step S706 Target SGSN finds to receive, then this step omits.
If be not with any DRB information in the Relocation Request Acknoledge message that step S707 Target SGSN finds to receive, then in Forward Relocation Response message, increase SRB-Only PS HO and activate indication to Source MME.
If SRB-Only PS HO is supported in indication among the step S708 step S507, then this step omits; Otherwise by existing flow processing.
Further, as shown in Figure 8, for E-UTRAN to HO execution phase that UTRAN does the end side in the scene of PS HO:
Wherein step S801～step S806 can describe with reference to the flow process of similar step in the prior art, in this no longer repeat specification.
If be not with any DRB information in the Relocation Request Acknoledge message that step S807 Target SGSN finds to receive, then Target SGSN puts 0 with the F-TEID of RNC in issuing the Modify BearerRequest message of SGW.
All the other steps all can be handled according to existing procedure, and wherein, for step S812～step S813, if SRB-Only PS HO is performed, then these two steps can be omitted, otherwise use existing procedure.
Compared with prior art, the embodiment of the invention has the following advantages:
By using the technical scheme of the embodiment of the invention, make and do not have the UE of PS domain data service, particularly carry out the Idle state UE of MT call, under the situation that network allows, can carry out SRB-Only PSHO, thereby reduce the time delay of CSFB, in addition, can on the SGSN rank, control by the policy deployment according to operator in the method.
In order to realize the technical scheme of the embodiment of the invention, the embodiment of the invention also provides a kind of RNC, and its structural representation specifically comprises as shown in Figure 9:
Wherein, described SRB-Only PS HO indication information is specially:
Be included in the sign among the transparent vessel Source-RNC-to-Target-RNC-TransparentContainer that the base station sends.
On the other hand, the embodiment of the invention also provides a kind of SGSN, and its structural representation specifically comprises as shown in figure 10:
In concrete application scenarios, SGSN also comprises:
Further, when comprising SRB-Only PS HO indication information in the RELOCATION REQUEST message of the MME transmission that described judge module judgement receives, described function identification module is according to default operation strategy and the ability information of self, judge and self whether support SRB-Only PS HO function, if support, determine that then the professional type of switching is SRB-Only PS HO,, determine that then the professional type of switching is Full PS HO if do not support;
When comprising the CSFB indication information in the RELOCATION REQUEST message of the MME transmission that described judge module judgement receives, described function identification module indicating target RNC carries out Full PS HO.
On the other hand, this SGSN also comprises:
Discard module 106 is used for when function identification module 103 judges that SGSN do not support SRB-Only PSHO function, abandons that institute comprises SRB-Only PS HO indication information in the RELOCATION REQUEST message that communication module 101 received MME send.
On the other hand, the embodiment of the invention also provides a kind of base station, and its structural representation specifically comprises as shown in figure 11:
Module 111 is set, is used to be provided with and judges whether terminal equipment can use the strategy of SRB-Only PS HO function;
Sending module 114, be used for when judge module 113 judges that terminal equipment can be used SRB-Only PSHO function, send the handoff request message that comprises SRB-Only PS HO indication information to MME, also be used for when judge module 113 judges that terminal equipment cannot be used SRB-Only PS HO function, sending the handoff request message that comprises the CSFB indication information to described MME.
Wherein, the set strategy of module 111 is set, specifically comprises:
Obtain the strategy of the state of terminal equipment before handover operation is carried out in request;
Obtain the strategy of the data flow state in the current system;
Default terminal equipment can be used the trigger condition of SRB-Only PS HO function.
Compared with prior art, the embodiment of the invention has the following advantages:
By using the technical scheme of the embodiment of the invention, make and do not have the UE of PS domain data service, particularly carry out the Idle state UE of MT call, under the situation that network allows, can carry out SRB-Only PSHO, thereby reduce the time delay of CSFB, in addition, can on the SGSN rank, control by the policy deployment according to operator in the method.
Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, the technical scheme of the embodiment of the invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) each implements the described method of scene to carry out the embodiment of the invention.
It will be appreciated by those skilled in the art that accompanying drawing is a preferred schematic diagram of implementing scene, module in the accompanying drawing or flow process might not be that the enforcement embodiment of the invention is necessary.
It will be appreciated by those skilled in the art that the module in the device of implementing in the scene can be distributed in the device of implementing scene according to implementing scene description, also can carry out respective change and be arranged in the one or more devices that are different from this enforcement scene.The module of above-mentioned enforcement scene can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number is not represented the quality of implementing scene just to description.
More than disclosed only be the several concrete enforcement scene of the embodiment of the invention, still, the embodiment of the invention is not limited thereto, any those skilled in the art can think variation all should fall into the traffic limits scope of the embodiment of the invention.
Claims (18)
1. a PS territory is characterized in that to the business switch method of 2G/3G network, comprising:
RNC judges whether the transparent vessel Source-RNC-to-Target-RNC-TransparentContainer that receives comprises SRB-Only PS HO indication information;
If comprise, described RNC carries out SRB-OnlyPS HO operation to the pairing terminal equipment of described transparent vessel.
2. the method for claim 1 is characterized in that, described Source-RNC-to-Target-RNC-Transparent Container is specially:
The transparent vessel Source-RNC-to-Target-RNC-TransparentContainer that the base station sends to Target RNC.
3. method as claimed in claim 2 is characterized in that, described RNC judges in the specify message that receives whether comprise before the SRB-Only PS HO indication information, also comprise:
Described base station determines whether to increase SRB-Only PS HO indication according to predetermined strategy in described Source-RNC-to-Target-RNC-Transparent Container.
4. method as claimed in claim 3 is characterized in that, described preset strategy specifically comprises:
The state of described terminal equipment before handover operation is carried out in request;
Data flow state in the current system;
Default terminal equipment can be used the trigger condition of SRB-Only PS HO function.
5. a RNC is characterized in that, comprises
Judge module is used for judging whether the transparent vessel that receives comprises SRB-Only PS HO indication information;
Processing module is used for when described judge module judgement comprises SRB-Only PS HO indication information the pairing terminal equipment of described transparent vessel being carried out SRB-Only PS HO operation.
6. RNC as claimed in claim 4 is characterized in that, described SRB-Only PS HO indication information is specially:
Be included in the sign among the transparent vessel Source-RNC-to-Target-RNC-TransparentContainer that the base station sends.
7. a PS territory is characterized in that to the business switch method of 2G/3G network, comprising:
Comprise SRB-Only PSHO indication information or CSFB indication information in the RELOCATION REQUEST message that the MME that the SGSN judgement receives sends;
According to the result of described judgement, described SGSN determines that according to predetermined strategy the professional type of switching is SRB-Only PS HO or Full PS HO;
Described SGSN carries out the PS territory according to the determined professional type of switching to the pairing terminal equipment of described RELOCATION REQUEST message and switches to the business of 2G/3G network.
8. whether method as claimed in claim 7 is characterized in that, comprise before SRB-Only PS HO indication information or the CSFB indication information in the RELOCATION REQUEST message that the MME that described SGSN judgement receives sends, and specifically comprises:
Described base station judges whether to use SRB-Only PS HO function according to preset strategy;
If of course, described base station sends the handoff request message that comprises SRB-Only PS HO indication information to described MME, if cannot, described base station sends the handoff request message that comprises the CSFB indication information to described MME;
If described MME receives the handoff request message that comprises SRB-Only PS HO indication information, the RELOCATION REQUEST message that then comprises described SRB-Only PS HO indication information to described SGSN, if described MME receives the handoff request message that comprises the CSFB indication information, then send the RELOCATION REQUEST message that comprises the CSFB indication information to described SGSN.
9. method as claimed in claim 8 is characterized in that, described preset strategy specifically comprises:
The state of described terminal equipment before handover operation is carried out in request;
Data flow state in the current system;
Default terminal equipment can be used the trigger condition of SRB-Only PS HO function.
10. method as claimed in claim 7 is characterized in that, described result according to described judgement, and described SGSN determines that according to predetermined strategy the professional type of switching is SRB-Only PS HO or FullPS HO, is specially:
When comprising SRB-Only PS HO indication information in the RELOCATION REQUEST message of the MME transmission that described SGSN judgement receives, described SGSN is according to default operation strategy and the ability information of self, judge and self whether support SRB-Only PS HO function, if support, determine that then the professional type of switching is SRB-Only PS HO, if do not support, determine that then the professional type of switching is Full PSHO;
When comprising the CSFB indication information in the RELOCATION REQUEST message of the MME transmission that described SGSN judgement receives, described SGSN is transmitted to Target RNC with this indication, represents that professional switching type is FullPS HO.
11. method as claimed in claim 7, it is characterized in that, when described SGSN determines that the professional type of switching is SRB-Only PS HO, described SGSN carries out the PS territory according to the determined professional type of switching to the pairing terminal equipment of described RELOCATION REQUEST message and switches to the business of 2G/3G network, is specially:
Described SGSN sends RELOCATION REQUEST message to RNC, and receive the relocation response message that described RNC returns, comprise the indication information that the described RNC of indication does not set up RAB in the described RELOCATION REQUEST message, simultaneously, if do not comprise any DRB information in the relocation response message that described SGSN receives, then described SGSN sends relocation response message to described MME, notify the business switching of described MME Access Network side to finish, comprise the Indication message that SRB-Only PS HO function is activated in the described relocation response message, otherwise described SGSN determines that the professional type of switching is Full PS HO;
Described SGSN sends the bearing modification request to SGW, and the F-TEID of the described RNC that is comprised in the described bearing modification request puts 0.
12. method as claimed in claim 7, it is characterized in that, when described SGSN determines that the professional type of switching is Full PS HO, described SGSN carries out the PS territory according to the determined professional type of switching to the pairing terminal equipment of described RELOCATION REQUEST message and switches to the business of 2G/3G network, specifically comprises:
Described SGSN sends RELOCATION REQUEST message to RNC, carries the CSFB indication;
Described RNC judges currently whether have enough resources and set up all DRB;
If do not have, described RNC uses the professional switching type of SRB-Only PS HO to carry out the business switching automatically, and return to described SGSN and not comprise any DRB information relocation response message, this moment, described SGSN comprised the indication information that SRB-Only PS HO function is activated in the relocation response message that described MME sends;
If have, described RNC returns relocation response message to described SGSN and confirms that the professional switching type of described SGSN application Full PS HO carries out business and switches.
13. a SGSN is characterized in that, comprising:
Communication module is used to receive the RELOCATION REQUEST message that MME sends;
Judge module is used for judging that the RELOCATION REQUEST message that the received MME of described communication module sends comprises SRB-Only PS HO indication information or CSFB indication information;
The function identification module is used for the result according to described judgement, determines that according to predetermined strategy the professional type of switching is SRB-Only PS HO or Full PS HO;
Handover module is used for according to the determined professional type of switching of described function identification module, and the pairing terminal equipment of RELOCATION REQUEST message that the described MME that receives is sent carries out the business switching of PS territory to the 2G/3G network.
14. SGSN as claimed in claim 13 is characterized in that, also comprises:
Module is set, is used to be provided with operation strategy and the ability information of described SGSN, make described function identification module discern described SGSN in view of the above and whether support SRB-Only PS HO function.
15. SGSN as claimed in claim 13 is characterized in that,
When comprising SRB-Only PS HO indication information in the RELOCATION REQUEST message of the MME transmission that described judge module judgement receives, described function identification module is according to default operation strategy and the ability information of self, judge and self whether support SRB-Only PS HO function, if support, determine that then the professional type of switching is SRB-Only PS HO, if do not support, determine that then the professional type of switching is FullPS HO;
When comprising the CSFB indication information in the RELOCATION REQUEST message of the MME transmission that described judge module judgement receives, described function identification module indicating target RNC carries out Full PS HO.
16. SGSN as claimed in claim 15 is characterized in that, also comprises:
Discard module is used for when described function identification module judges that described SGSN does not support SRB-Only PSHO function, abandons that institute comprises SRB-Only PS HO indication information in the RELOCATION REQUEST message that the received MME of described communication module sends.
17. a base station is characterized in that, comprising:
Module is set, is used to be provided with and judges whether terminal equipment can use the strategy of SRB-Only PS HO function;
Receiver module is used for the handoff request message that receiving terminal apparatus sends;
Judge module is used for according to the described set strategy of module that is provided with, and judges whether described terminal equipment can use SRB-Only PS HO function;
Sending module, be used for when described judge module judges that described terminal equipment can be used SRB-Only PSHO function, send the handoff request message that comprises SRB-Only PS HO indication information to described MME, also be used for when described judge module judges that described terminal equipment cannot be used SRB-Only PS HO function, send the handoff request message that comprises the CSFB indication information to described MME.
18. base station as claimed in claim 17 is characterized in that, the described set strategy of module that is provided with specifically comprises:
Obtain the strategy of the state of described terminal equipment before handover operation is carried out in request;
Obtain the strategy of the data flow state in the current system;
Default terminal equipment can be used the trigger condition of SRB-Only PS HO function.
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