CN101370261B - Resource preparation method and communication equipment for switching from CS field to PS field - Google Patents
Resource preparation method and communication equipment for switching from CS field to PS field Download PDFInfo
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Abstract
The embodiment of the invention provides a resource preparing method of switching from a CS domain to a PS domain, including: when user equipment (UE) needs to be switched to a packet switching (PS) domain from a circuit switching (CS) domain, sending the requirements of requiring to obtain the needed IP address when the UE is switched to the PS domain, and requiring the IP address from the target access gateway according to the received requirements by the target mobile management entity; receiving the IP address sent by the target mobile management entity. The embodiment of the invention further provides a communication device. The technical proposal provided by the embodiment of the invention is the resource preparing for the UE switching from the CS domain to the PS domain, thereby being capable of implementing the UE switching from the CS domain to the PS domain, guaranteeing the continuity of the user's voice service in the switching process, and enhancing the user experience.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to resource preparation method and communication equipment that a kind of subscriber equipment (UE) switches to packet switching (PS) territory from circuit switching (CS) territory.
Background technology
Third generation partner plans (3GPP, 3rd Generation Partnership Project) in its R7 (Release 7) version, for realizing that fixed mobile network merges continuous voice call (VCC is proposed, Voice Call Continuity) technology, to realize that audio call is in the CS of 3GPP system and IMS system, as the conversion between the grouping system (EPS, Evolved Packed System) of evolution.The starting point that 3GPP proposes the VCC technology mainly is the covering and the switching problem that will solve mobile communication system and wireless lan (wlan).Wherein, the realization of VCC requires UE to have the ability of access mobile communication system and WLAN simultaneously, and it is VCC UE that weighing-appliance has the UE of this ability, among the application, for simplicity, abbreviates VCC UE as UE.
But because UE does not support to insert simultaneously the different mobile communication system, as not inserting 2G system and 3G system simultaneously, therefore, for guaranteeing that the user's voice business switches to the continuous voice call in PS territory from the CS territory, 3GPP proposes a kind of single VCC of access (SR VCC in its R8 version, SingleRadio VCC) conception of technology, realize that with expectation UE is switching to the PS territory from the CS territory, switch to the PS territory of EPS as CS territory from the 2G system, or when the CS territory of 3G system switches to the PS territory of EPS system, still can guarantee the continuity of its audio call.
But in the prior art, SR VCC technology also still is some imaginations, and for specifically how realizing switches, as, how UE is switched required resource from the CS territory to the PS territory to prepare, do not provide concrete solution among the R8 yet.
Summary of the invention
The embodiment of the invention provides a kind of resource preparation method that switches from the CS field to PS field, can be UE and switches the resource of preparing switching from the CS field to PS field.
A kind of resource preparation method that switches from the CS field to PS field comprises:
When user equipment (UE) need switch to packet switching PS territory from the circuit switching (CS) territory, send requirement to the target mobile management entity and obtain the request that described UE switches to required IP address, PS territory, by the target mobile management entity according to the described request that receives, to the described IP of target access gateway request address;
The described IP address that the receiving target mobile management entity is sent.
The embodiment of the invention also provides a kind of communication equipment, is used to control the switching from the CS territory to the PS territory, comprising: transmitting element and receiving element; Wherein,
Transmitting element is used for sending requirement to the target mobile management entity and obtains the request that described UE switches to required IP address, PS territory;
Receiving element is used for the described IP address that the receiving target mobile management entity is sent.
The embodiment of the invention also provides another kind of communication equipment, is used for the mobile management of mobile communication, comprising: request receiving element, processing unit and address transmitting element;
The request receiving element is used to receive requirement switches to request from required IP address, PS territory to the described UE of target access gateway application;
Processing unit is used for to the described IP of target access gateway application address, and the described IP address returned of receiving target IAD;
The address transmitting element is used for described IP address is sent.
The embodiment of the invention provides in the technique scheme, obtain UE by the target mobile management entity to target access gateway and switch to required IP address, PS territory from the CS territory, for making resource from the switching of CS field to PS field, prepares UE, and then can realize the switching of UE from the CS field to PS field, guarantee in the handoff procedure, the continuity of user's voice business improves user experience.
Description of drawings
Fig. 1 is the resource preparation method flow chart that UE switches from the CS field to PS field in the embodiment of the invention;
Fig. 2 a is the preparation flow chart before UE switches from the CS field to PS field in the embodiment of the invention one;
Fig. 2 b is the flow chart that in the present embodiment one UE is switched to the PS territory from the CS territory;
Fig. 3 is the preparation flow chart before UE switches from the CS field to PS field in the embodiment of the invention four;
Fig. 4 a is the preparation flow chart before UE switches from the CS field to PS field in the embodiment of the invention five;
UE switches to the signaling process figure in PS territory among Fig. 4 b embodiment five from the CS territory;
Fig. 5 is existing UE switches to the EPS network from the PS territory of 3G switching flow figure;
Fig. 6 is the schematic diagram of the ICCC passage between existing IMS and the CS territory;
Fig. 7 is the structural representation of communication equipment 700 in the embodiment of the invention;
Fig. 8 is the structural representation of communication equipment 800 in the embodiment of the invention.
Embodiment
Describe in further detail below in conjunction with the technical scheme of accompanying drawing the embodiment of the invention.
The embodiment of the invention provides UE to prepare scheme from the resource that the CS field to PS field switches, and resource is prepared to be included as the IP address that UE obtains the PS territory.Wherein, adaptive for realizing the signaling between PS territory and CS territory, an intermediate NE can be set.In the embodiment of the invention, if UE switching under the CS control from the CS territory to the PS territory carried out, this intermediate NE can be the mobile switching centre (MSC, evolved Mobile Switching Centre) of target side so, is called eMSC; Carry out if switch under the IMS control, this intermediate NE can be PS and CS switching control function body (PCHCF, PS-CSHandover Control Function) so.
Referring to Fig. 1, Fig. 1 is the resource preparation method flow chart that UE switches from the CS field to PS field in the embodiment of the invention, and this flow process can may further comprise the steps:
When step 101, intermediate NE need switch to packet switching PS territory at user equipment (UE) from the circuit switching (CS) territory, intermediate NE is to target mobile management entity (MME, Mobility ManagementEntity) sends requirement and obtain the request that described UE switches to required IP address, PS territory, by the target mobile management entity according to the described request that receives, to the described IP of target access gateway request address.
The described IP address that step 102, intermediate NE receiving target mobile management entity are sent.
Carrying out under the CS control with UE switching in from the CS territory to the PS territory below is example, describes in detail in the embodiment of the invention, how to prepare for UE carries out resource from tangential PS territory, CS territory, comprises that obtaining UE switches to required IP address, PS territory from the CS territory.
Embodiment one:
Referring to Fig. 2 a, Fig. 2 a is the preparation flow chart before UE switches from the CS field to PS field in the embodiment of the invention one, and this flow process may further comprise the steps:
Step 201, UE are notified to source BSS with the measurement report of adjacent cells, and source BSS is according to cell measurement reporting decision initiation switching flow.
Step 202, source BSS send to source MSC with handoff request (HO Required) message.
Carry type of message (Message Type), switch reasons (Cause), cell identification list information such as (Cell Identifier List) in this HO Required message.
After step 203, source MSC receive HO Required message, initiate inter-office switchover, send and prepare handoff request (MAP-Prep-Handover req) message to eMSC according to Target Cell Identifier.
Carry the information of Transaction Identifier (Invoke Id), Target Cell Identifier (Target Cell Id), speech channel routing number (HO Number), international mobile subscriber identity (IMSI, International Mobile Subscriber Identification), integrity protection information (Integrity Protection Information), enciphered message (Encryption Information) etc. in this MAP-Prep-Handover req message.This message mainly is that notice eMSC does the preparation of target side resource.
Step 204, eMSC judge that according to Target Cell Identifier the audio call needs are switched to the PS territory from the CS territory, then dispose proprietary access point (APN according to configuration informations such as customer service characteristics and requirements, Access Point Name), bring target MME with this APN by preceding commentaries on classics re-positioning request (Forward RelocationRequest) message.
In the embodiment of the invention, eMSC switches to required IP address, PS territory by Forward Relocation Request message indicating target MME to target access gateway application UE, carries the APN as IP application IP addresses indication information in this message.Because there is corresponding relation in the address of APN and target access gateway, therefore, after target MME receives above-mentioned Forward Relocation Request message, can find corresponding target access gateway according to proprietary APN wherein.
In addition, remove in this Forward Relocation Request message and carry the APN parameter, go back portability Target Cell Identifier, target BS sign, information such as IMSI.
After step 205, MME receive Forward Relocation Request message, according to proprietary APN wherein, find corresponding target access gateway, send to this target access gateway and set up default bearer context request (Create Bearer Context Request) message; Target access gateway will return to target MME for the UE IP address allocated by setting up default bearer response (Create Default Bearer Response) message.
In the embodiment of the invention, target access gateway can be packet data gateway (PDN GW, PacketData Networks Gateway), or PDN GW and closing of Serving GW are established.Wherein, PDN GW has the function of distributing IP address.In the embodiment of the invention, MME is according to the corresponding relation of APN and PDNGW, find corresponding PDN GW after, by send CreateBearer Context Request message to this PDN GW, request PDN GW is the IP address that UE distributes a PS territory.In addition, carry the information of the IMSI, MME Context identifier etc. of UE in this Create Bearer Context Request message.
Change response (Forward RelocationResponse) message of re-positioning request before step 206, MME send and give eMSC, carry the IP address in the PS territory of distributing into UE and the information of port numbers in this message.
So far, intermediate NE has got access to and has switched to required IP address, PS territory from the CS territory for UE.Then, intermediate NE needs further to carry out the required voice dedicated bearing of audio call in the PS territory for UE prepares it.
Step 207, eMSC send MAP-Prep-Handover rsp message to source MSC.Remove the information of carrying Invoke Id, Handover Number, selected UMTS operation rule (SelectedUMTS Algorithms), selected wireless resource information (Chosen Radio ResourceInformation) etc. in this message.
Step 208, source MSC send address information (IAM just, initial address message) message is given eMSC, remove in this IAM message and carry Destination Point Code (DPC, Destination PointCode), OPC Origination Point Code (OPC, Orignal Point Code), professional indication information such as (Serviceindicaotr), also need carry user service information (User Service information).This User service information information source comprises information such as type of service and service bandwidth, and wherein type of service can correspond to the quality of service type sign (QCI, QoS Class identifier) among the QoS.
Step 209, eMSC send Address requests (add Request) message, the address information of request target MGW to target MGW; Target MGW notifies eMSC by address response (add Response) message with its IP address and port numbers.
The effect of this step is the territory into UE incision PS, asks and obtain the information of UE at the data feedback channel of Target cell.
Step 210 to 217, eMSC as Application Function (AF) to strategy and billing function body (PCRF, Policy and Charging Rules Function) policy control and the charging (PCC of proprietary voice bearer set up in request, Policy Control and Charging) rule, indication PDN GW sets up UE and switches to the target BS (eNB) that will use behind the PS territory and the voice dedicated bearing between this PDN GW.Comprise: eMSC sends application request (Application Request) message to PCRF, and the information such as IMSI of carrying user service information and UE in this message are asked the PCC rule by this message to PCRF; PCRF provides (PCC Provision) message according to user service information by PCC, and the PCC rule is returned PDN GW; After PDN GW receives the PCC rule, send dedicated bearing to target MME and set up request (Dedicated bearer Request) message; After target MME receives that dedicated bearing is set up request message, IP address, default bearer and dedicated bearing packing are placed in re-positioning request (Relocation Request) message, notice eNB creates carrying; ENB returns re-positioning request and confirms (Relocation Request Acknowledge) message, and expression voice dedicated bearing is created successfully; Target MME returns dedicated bearing to PDN GW and sets up request responding (Dedicated bearerResponse) message, notice PDN SGW downlink tunnel information, and target MME can inform PDN SGW downlink tunnel information with many response message; PDN SGW returns Pcc ProvisionAck message to PCRF; PCRF returns Application Ack message to eMSC after receiving Pcc Provision Ack message.
In the above-mentioned steps, at target MME in the Relocation Request that eNB sends, portability is distributed on the IP address of UE and the PDN GW and is set up voice dedicated bearing relevant parameter, after the voice dedicated bearing is set up successfully, can be in the step 224 of present embodiment one, by eNB with the IP address of UE in the PS territory, and voice dedicated bearing relevant parameter, comprise: set up on the PDN GW and set up voice dedicated bearing relevant parameter on voice dedicated bearing relevant parameter and the eNB, bring UE.If target MME does not carry to eNB by RelocationRequest message setting up voice dedicated bearing relevant parameter on IP address and the PDN GW, then can after switch to Target cell, UE issue NAS message by MME and bring UE IP address and voice dedicated bearing relevant parameter.
Step 218, eMSC send to revise to target MGW and ask (Mod Request) message that target MGW is informed in UE IP address and port numbers; Target MGW returns to eMSC and revises response (ModResponse) message.
Step 219, eMSC send Address Complete Message (ACM, Address Complete message) message informing source MSC target side resource and are ready to complete.
Referring to Fig. 2 b, Fig. 2 b is the flow chart that in the present embodiment one UE is switched to the PS territory from the CS territory.This flow process can may further comprise the steps:
Step 220 to 221, source MSC sends switching command (HO Command) to source BSS, source BSS sends HO Command to UE.
Step 222, UE switch to the Target cell in PS territory from the CS territory.
Step 223, UE send change detection (Handover Detect) message to target eNB, and it has inserted Target cell notification target eNB.
Step 224, eNB are with the IP address of UE in the PS territory, and voice dedicated bearing relevant parameter brings UE by RRC message Eutran mobility information message.
Step 225 is to step 232, and after UE was linked into Target cell, the notice source discharged resource.
Switching flow shown in Fig. 2 b can switch relevant signaling process based on existing minizone and carry out, and does not give unnecessary details.
So far, present embodiment one is finished UE and is switched required resource preparation from the CS field to PS field, and sets up the voice dedicated bearing of UE in the PS territory, and with the IP address of UE in the PS territory, and voice dedicated bearing relevant parameter is notified to UE; Realized the switching of UE from the CS territory to the PS territory.
Embodiment two:
Present embodiment two is that with the difference of the foregoing description one eMSC indicating target MME switches to the mode difference of required IP address, PS territory to the described UE of target access gateway application.Still can realize in the present embodiment two that UE may further comprise the steps from the flow process that the CS territory switches to the PS territory referring to Fig. 2 a and 2b:
Step 301 is identical to the flow process of step 203 with step 201 to the flow process of step 303.
Step 304, eMSC judge that the speech business of UE in the CS territory need be switched to the PS territory, then, bring target MME by preceding commentaries on classics re-positioning request (Forward Relocation Request) message with this CS voice indicator according to configuration informations such as customer service characteristics and requirement configuration CS voice indications (CS voice indicator).
Promptly entrained IP application IP addresses indication information is not APN in this Forward Relocation Request message, but CS voice indicator.
Step 305, target MME can indicate according to CS voice indicator, and the address that directly disposes PGW perhaps disposes proprietary APN earlier, finds corresponding PGW address according to APN then, to this required IP address of PGW application UE.
Step 306 to the flow process of step 330 can be identical to the flow process of step 230 with above-mentioned steps 206.
So far, present embodiment two carries out the resource preparation by UE is switched from the CS field to PS field, realizes the switching of the voice call service of UE from the CS field to PS field.
Embodiment three:
Present embodiment three is also that with the difference of the foregoing description one and embodiment two eMSC indicating target MME switches to the mode difference of required IP address, PS territory to the described UE of target access gateway application.Still can realize in the present embodiment two that UE may further comprise the steps from the flow process that the CS territory switches to the PS territory referring to Fig. 2 a and Fig. 2 b:
Step 401 is identical to the flow process of step 203 with step 201 to the flow process of step 403.
It is the audio call in tangential PS territory that step 404, eMSC are judged, then disposes the address of PDN GW according to configuration informations such as customer service characteristics and requirements, and the address of this PDN GW is sent to target MME by ForwardRelocation Request message.
Entrained IP application IP addresses indication information is not APN in this Forward Relocation Request message, neither CS voice indicator, but directly be the address of PDN GW.
Step 405, target MME can find corresponding PGW address directly according to the address of the PDN PGW that obtains, to this required IP address of PGW application UE.
Step 406 to the flow process of step 430 can be identical to the flow process of step 230 with above-mentioned steps 206.
So far, present embodiment three carries out the resource preparation by UE is switched from the CS field to PS field, realizes the switching of the voice call service of UE from the CS field to PS field.
Embodiment four:
In the foregoing description one to embodiment three, as AF, indication PDN GW finishes by intermediate NE in the foundation of voice dedicated bearing.In the present embodiment four, the foundation of voice dedicated bearing is finished by target MME indication PDN GW.
Referring to Fig. 3, Fig. 3 is the preparation flow chart before UE switches from the CS field to PS field in the embodiment of the invention four, and this flow process can may further comprise the steps:
Step 501 to the flow process of step 502 can be identical to the flow process of step 202 with above-mentioned steps 201.
After step 503, source MSC receive HO Required message, initiate inter-office switchover, send MAP-Prep-Handover req message to eMSC according to Target Cell Identifier.
In the present embodiment four, source MSC sends in the MAP-Prep-Handover req message of eMSC also needs to increase a cell, i.e. User Service information.
After step 504, eMSC receive MAP-Prep-Handover req message, according to Target Cell Identifier wherein, judge that audio call need be switched to the PS territory from the CS territory, by ForwardRelocation Request message, issue IP application IP addresses indication information to target MME, this IP application IP addresses indication information can be proprietary APN, CS voice indicator, or the address of PDN GW; And eMSC brings target MME by this MAP-Prep-Handover req message with User Service information.
Step 505, target MME adopt according to IP application IP addresses indication information and are normal direction PDNGW application UE accordingly in the IP address in PS territory, and PDN GW returns to target MME with an IP address.
Step 506, target MME bring PDN GW with User Service information by Dedicated bearerSetup Request message, and indication PDN GW sets up the voice dedicated bearing.
After step 507 receives the Dedicated bearerRequest message of target MME transmission to step 508, PDN GW, send PCC rule request (PCC Rule Request) message to PCRF, and bring PCRF by this PCC Rule Request message User Service information; PCRF returns corresponding PCC rule according to User Service information to PDN GW.
Step 509, PDN GW return Dedicated bearer Setup Response message to target MME.
Step 510 to 511, target MME sends Relocation Request message to target eNB, carry in this message on the IP address of distributing to UE and the PDN GM and set up voice dedicated bearing relevant parameter; After target eNB is received Relocation Request message, create the voice dedicated bearing, return Relocation Request Acknowledge to target MME.
Step 512 is returned Dedicated bearer SetupAcknowledge message to PDN GW to step 513, target MME, and Dedicated bearer Setup Response message.
Step 514, PDN GW return PCC Provision Acknowledge message to PCRF.
Step 515, target MME return Forward Relocation Response message to eMSC.
Above-mentioned steps 512,513 and 515 execution sequence do not have strict restriction, and the transmission of PCCProvision Acknowledge message need be carried out after PDN GW receives Dedicated bearerSetup Acknowledge message in the step 514.
Step 516, eMSC send MAP-Prep-Handover rsp message to source MSC.Remove the information of carrying Invoke Id, Handover Number, selected UMTS operation rule (SelectedUMTS Algorithms), selected wireless resource information (Chosen Radio ResourceInformation) etc. in this message.
Step 517 to 518, source MSC sends IAM message to eMSC, eMSC sends ACM message informing source MSC target side resource and is ready to complete.
Step 519 to the flow process of step 531 can be identical with above-mentioned steps 220 to the flow process of step 232.
So far, prepare for UE carries out resource from the switching of CS field to PS field in the present embodiment four, realize of the process end of the voice call service of UE from the switching of CS field to PS field.
In the foregoing description one to embodiment four, IP address and voice dedicated bearing relevant parameter that UE is required bring UE in target side by target MME or target BS.In following examples five, after setting up successfully at the voice dedicated bearing, bring UE with the IP address and the voice dedicated bearing relevant parameter of UE in the PS territory, in the signaling process in CS territory, increased a message from target MME to eMSC, earlier bring eMSC by this message, bring source MSC by eMSC with the IP address and the voice dedicated bearing relevant parameter of UE more afterwards, and be handed down to UE by source MSC in the PS territory with the IP address and the voice dedicated bearing relevant parameter of UE in the PS territory.
Embodiment five:
Referring to Fig. 4 a, Fig. 4 a is the preparation flow chart before UE switches from the CS field to PS field in the embodiment of the invention five, and this flow process can may further comprise the steps:
Step 601 to step 602, UE at CS territory originating call, source BSS sends HO Required message to source MSC.
After step 603, source MSC receive HO Required message,, initiate inter-office switchover according to the Target Cell Identifier that carries in this message; Source MSC sends MAP-Prep-Handover req message to eMSC, and notice eMSC does the target side switchable resource and prepares.
In this step, source MSC sends to needs newly-increased cell User Service information in the MAP-Prep-Handover req message of eMSC.
Step 604 is to 605 identical with the flow process of above-mentioned steps 204 to 205.
Step 606, target MME send Forward Relocation Rsp message message to eMSC.Carry to UE IP address allocated in this message, and the IMSI of UE.
Step 607, eMSC send Mod Request message to target MGW target MGW are informed in UE IP address and port numbers; Target MGW returns Mod Response message to eMSC.
Step 608 is identical with the flow process of above-mentioned steps 210 to 214 to 612 flow process.
Step 613, after target MME receives that response message is set up in carrying that PDN GW returns, bring eMSC with the IP address and the voice dedicated bearing relevant parameter of UE by bearer related information (Bearer information provision) message is provided in the PS territory.
In this step 613, by newly-increased NAS message, promptly Bearer information provision message can send to eMSC with IP address and the voice dedicated bearing relevant parameter of UE in the PS territory.
In addition, there is not strict sequence limit between the transmission of the transmission of above-mentioned newly-increased message and Dedicated bearer setup ack.
Step 614 to 615, PDN GW returns PCC provision Acknowledge to PCRF; PCRF returns the corresponding ApplicationAcknowledge with Application Request to eMSC.
Step 616, eMSC send Mod Request message to target MGW target MGW are informed in UE IP address and port numbers; Target MGW returns Mod Response message to eMSC.
Step 617, eMSC send MAP-Prep-Handover rsp message source MSC.Carry IP address and the voice dedicated bearing relevant parameter of UE in this MAP-Prep-Handover rsp message in the PS territory.
Step 618, source MSC send IAM message informing eMSC.
Step 619, eMSC send ACM message informing source MSC target side resource and are ready to complete.
So far, required IP address, the tangential PS of UE territory and voice dedicated bearing are set up and all are ready to complete.
Referring to Fig. 4 b, UE switches to the signaling process figure in PS territory among Fig. 4 b embodiment five from the CS territory.This flow process can may further comprise the steps:
Step 620 sends to source BSS with the IP address and the voice dedicated bearing relevant parameter of UE in the PS territory by HO Command to step 621, source MSC; By source BSS this HOCommand is sent to UE again, and then bring UE the IP address and the voice dedicated bearing relevant parameter of UE in the PS territory.
Step 622, UE switch to the Target cell in PS territory from the CS territory.
Step 623, UE send change detection (Handover Detect) message to target eNB, and it has inserted Target cell notification target eNB.
Step 624 is identical with the flow process of above-mentioned steps 225 and 232 to the flow process of step 631.
In the present embodiment five, by in the signaling process in CS territory, increasing a Bearer information provision message that sends to eMSC by target MME, by this message IP address and the voice dedicated bearing relevant parameter band of UE in the PS territory is notified to eMSC, brings UE with IP address and the voice dedicated bearing relevant parameter of UE by source MSC by eMSC afterwards in the PS territory.
Embodiment six:
In the foregoing description one to embodiment five, UE may exist the speech business in CS territory and the data service in PS territory simultaneously.In the present embodiment six, the resource that switches to the PS territory for UE from the CS territory is prepared to adopt the relevant programme that provides above-mentioned five embodiment, and present embodiment six provides the technical scheme that the IP address that how will distribute to UE and voice dedicated bearing relevant parameter bring UE.
Referring to Fig. 5, Fig. 5 is existing UE switches to the EPS network from the PS territory switching flow figure.In the present embodiment six, be located at UE and initiate earlier the data service in PS territory is switched to the EPS network from the PS territory of 3G; Initiate then the speech business of CS territory is switched to the EPS network from the CS territory, then can IP address and the voice dedicated bearing relevant parameter of UE will be distributed to, Forward RelocationResponse message by the PS switching, send to the mobile management entity of source, as source Serving GPRS Support Node (SGSN, Serving GPRS Support Node) after, SGSN brings UE by the source.
In the various embodiments described above, as intermediate NE, the resource that UE is switched to the PS territory from the CS territory prepares to have done detailed description with eMSC.In the practical application, switching under IP Multimedia System (IMS, the IPMultimedia Subsystem) control can directly replace with PCHCF with eMSC, realize that UE switches to the resource preparation in PS territory under the IMS control from the CS territory, and then realize the switching of UE from the CS territory to the PS territory.
Embodiment seven:
Referring to Fig. 6, Fig. 6 is the IMS between existing IMS and the CS territory and the schematic diagram of the control channel between CS (ICCC, IMS CS Control Channel).In the present embodiment seven, establish UE switching under the IMS control and carry out from the CS territory to the PS territory.Under the IMS control mode, to establish between CS territory and IMS territory and have the ICCC passage, this ICCC passage can be used for carrying out the signaling transmission between CS territory and IMS territory.
The handoff procedure of UE from the CS territory to the PS territory, intermediate NE, i.e. PCHCF behind the IP address of knowing UE and voice dedicated bearing relevant parameter, by the ICCC passage, sends IP address and the voice dedicated bearing relevant parameter of UE to UE.
The embodiment of the invention also provides a kind of communication equipment 700, is used to control the switching from the CS territory to the PS territory, and this communication equipment 700 is above-mentioned intermediate NE, and this communication equipment 700 can be above-mentioned eMSC or PCHCF.Referring to Fig. 7, Fig. 7 is the structural representation of communication equipment 700 in the embodiment of the invention, and this communication equipment 700 can comprise: transmitting element 701 and receiving element 702; Wherein,
Transmitting element 701 is used for sending requirement to the target mobile management entity and obtains the request that UE switches to required IP address, PS territory;
Receiving element 702 is used for the IP address that the receiving target mobile management entity is sent.
Communication equipment 700 can further comprise: resource is prepared notice receiving element 703, is used for requirement that reception sources MSC sends and is UE and switch to the PS territory from the CS territory and carry out the notice that resource is prepared.
Accordingly, referring to Fig. 8, Fig. 8 is the structural representation of another kind of communication equipment 800 in the embodiment of the invention.This communication equipment 800 can be above-mentioned target MME, is used for the mobile management of mobile communication, and communication equipment 800 can comprise: request receiving element 801, processing unit 802 and address transmitting element 803;
Request receiving element 801 is used to receive requirement switches to request from required IP address, PS territory to the described UE of target access gateway application;
Processing unit 802 is used for to the described IP of target access gateway application address, and the described IP address returned of receiving target IAD;
Address transmitting element 803 is used for described IP address is sent.
The transmitting element of the communication equipment 700 among Fig. 7 specifically can be used for sending the message of carrying IP application IP addresses indication information to target MME.Accordingly, the processing unit among Fig. 8 802 can comprise: gateway is searched unit 8021, application unit 8022 and beared information receiving element 8023;
Gateway is searched unit 8021, is used for the IP application IP addresses indication information that 801 received requests are carried according to the request receiving element, finds and the corresponding target access gateway of this IP application IP addresses indication information;
Application unit 8022, being used to ask this target access gateway is that UE distributes described IP address;
Beared information receiving element 8023 is used for the described IP address that the receiving target IAD returns.
Applying for UE for UE behind required IP address, PS territory, also need set up UE in the PS territory and carry out the required voice dedicated bearing of speech business that this is carried between target access gateway and the target BS and sets up.The foundation of this voice dedicated bearing can be undertaken by communication equipment 700 indicating target IADs, also can be undertaken by communication equipment 800 indicating target IADs.
Correspondingly, communication equipment 700 can further comprise carrying foundation initiation unit 704, is used for sending user service information to target P CRF.This user profile can be carried to target access gateway by above-mentioned Application Request, after target access gateway is received this request, begins to set up UE and switches to the target access gateway that will use behind the PS territory and the voice dedicated bearing between the target BS.
Initiated by communication equipment 800 if set up the voice dedicated bearing, then transmitting element 701 further can be used for bringing communication equipment 800 with user service information by MAP-Prep-Handover request.Then communication equipment 800 can further comprise: business information receiving element 804 and carrying are set up and are initiated unit 805,
Business information receiving element 804, be used for receiving outside, i.e. the user service information sent of the transmitting element 701 of communication equipment 700;
Carrying is set up and is initiated unit 805, be used for bringing target access gateway by Dedicated bearerSetup Request with this user service information, after target access gateway is received this request, begin to set up UE and switch to the target access gateway that to use behind the PS territory and the voice dedicated bearing between the target BS.
Get access in required IP address, the tangential PS of UE territory, and the voice dedicated bearer set up finish after, need bring UE with IP address voice dedicated bearing relevant parameter.Communication equipment 700 can further comprise: beared information issues unit 705,
Receiving element 702, further receive from the target mobile management entity with voice dedicated bearing relevant parameter;
Beared information issues unit 705, is used for IP address that receiving element is received and sends to source MSC with voice dedicated bearing relevant parameter.After source MSC receives that beared information issues the relevant information of sending the unit, can be handed down to UE with the IP address with voice dedicated bearing relevant parameter.
IP address and also can issue by communication equipment 800 with voice dedicated bearing relevant parameter.Correspondingly, communication equipment 800 also can further comprise: beared information issues unit 806, is used for being handed down to target BS with the IP address with voice dedicated bearing relevant parameter, or directly is handed down to UE.
In sum, the embodiment of the invention provides in the technique scheme, obtain UE by the target mobile management entity to target access gateway and switch to required IP address, PS territory from the CS territory, for making resource from the switching of CS field to PS field, prepares UE, and then can realize the switching of UE from the CS field to PS field, guarantee in the handoff procedure that the continuity of user's voice business improves user experience.
Claims (16)
1. a resource preparation method that switches from the CS field to PS field is characterized in that, comprising:
When user equipment (UE) need switch to packet switching PS territory from the circuit switching (CS) territory, send requirement to the target mobile management entity and obtain the request that described UE switches to required IP address, PS territory, by the target mobile management entity according to the described request that receives, to the described IP of target access gateway request address;
The described IP address that the receiving target mobile management entity is sent;
Behind the described IP address that the receiving target mobile management entity is sent, this method further comprises:
By target strategy and billing function body PCRF, the notification target IAD is set up UE and is switched to the target access gateway that will use behind the PS territory and the voice dedicated bearing between the target BS;
Perhaps receive before the described IP address that described target mobile management entity sends, this method further comprises: the user service information that the source MSC that receives is sent sends to the target mobile management entity, the user service information that receives by the utilization of target mobile management entity, by target P CRF, the notification target IAD is set up the voice dedicated bearing.
2. method according to claim 1 is characterized in that, the target mobile management entity comprises to the step of the described IP of target access gateway request address:
The target mobile management entity is according to the IP application IP addresses indication information that carries in the described request that receives, configuration and the corresponding target access gateway of this IP application IP addresses indication information, asking this target access gateway is that UE distributes described IP address, and the described IP address returned of receiving target IAD.
3. method according to claim 2 is characterized in that, described IP application IP addresses indication information is: have the proprietary APN APN of corresponding relation with the address of target access gateway;
The step that the target mobile management entity disposes described target access gateway comprises: the target mobile management entity is according to the APN of knowing, and described corresponding relation, the address that disposes described target access gateway.
4. method according to claim 2 is characterized in that, described IP application IP addresses indication information is: be used for the CS speech business indication CS Voice indicator that the indicating target mobile management entity obtains the address of target access gateway;
The step that the target mobile management entity disposes described target access gateway comprises:
The target mobile management entity directly disposes the address of target access gateway according to the indication of CS Voice indicator; Or,
According to the indication of CS Voice indicator, there is the proprietary APN of corresponding relation in the address of configuration and target access gateway earlier, then according to described APN, and described corresponding relation, the address that disposes described target access gateway.
5. method according to claim 2 is characterized in that, described IP application IP addresses indication information is: the address of target access gateway.
6. method according to claim 1 is characterized in that, the step that the notification target IAD is set up described voice dedicated bearing comprises:
The user service information that the source MSC that receives is sent sends to target P CRF, issues corresponding strategy control and charging PCC rule according to user service information to target access gateway by target P CRF;
Target access gateway sends the request of setting up described voice dedicated bearing by the target mobile management entity to target BS according to the PCC rule that receives, and creates described voice dedicated bearing by target BS.
7. method according to claim 1 is characterized in that, the step that the notification target IAD is set up described voice dedicated bearing comprises:
The target mobile management entity sends to target P CRF with described user service information by target access gateway, and target P CRF issues corresponding PCC rule according to user service information to target access gateway;
Target access gateway sends the request of setting up described voice dedicated bearing by the target mobile management entity to target BS according to the PCC rule that receives, and creates described voice dedicated bearing by target BS.
8. according to claim 6 or 7 described methods, it is characterized in that, comprise to the step that target BS sends the request of setting up described voice dedicated bearing by the target mobile management entity:
The target mobile management entity is handed down to target BS with described IP address with described voice dedicated bearing relevant parameter by this request.
9. method according to claim 8 is characterized in that, create described voice dedicated bearing after, this method further comprises:
After UE switched to the PS territory from the CS territory, target BS was handed down to UE with described IP address with described voice dedicated bearing relevant parameter.
10. method according to claim 1 is characterized in that, set up described voice dedicated bearing after, this method further comprises:
Directly be handed down to UE by the target mobile management entity with described IP address with described voice dedicated bearing relevant parameter; Or,
The described IP address that the receiving target mobile management entity is sent and with described voice dedicated bearing relevant parameter, send to UE by source MSC with described IP address with described voice dedicated bearing relevant parameter.
11. method according to claim 1 is characterized in that, set up described voice dedicated bearing after, this method further comprises:
When UE further need switch to the PS territory from the CS territory, be handed down to UE by the target mobile management entity by the source mobile management entity with described IP address with described voice dedicated bearing relevant parameter.
12. method according to claim 1 is characterized in that, set up described voice dedicated bearing after, this method further comprises:
By IMS between IP Multimedia System IMS territory and the CS territory and the control channel ICCC passage between CS, send to UE with described IP address with described voice dedicated bearing relevant parameter.
13. a communication equipment is used to control the switching from the CS territory to the PS territory, it is characterized in that, comprising: transmitting element and receiving element; Wherein,
Transmitting element is used for sending requirement to the target mobile management entity and obtains the request that UE switches to required IP address, PS territory;
Receiving element is used for the described IP address that the receiving target mobile management entity is sent;
Described communication equipment further comprises carrying foundation initiation unit, is used for sending user service information to target P CRF;
Perhaps described communication equipment further comprises: beared information issues the unit,
Described receiving element, further receive from the target mobile management entity with voice dedicated bearing relevant parameter;
Beared information issues the unit, is used for sending to source MSC with described IP address with voice dedicated bearing relevant parameter.
14. communication equipment according to claim 13, it is characterized in that, described communication equipment further comprises: resource is prepared the notice receiving element, and this communication equipment that requires that is used for that reception sources MSC sends is that UE switches to the PS territory and carries out the notice that resource is prepared from the CS territory.
15. a communication equipment is used for the mobile management of mobile communication, it is characterized in that, comprising: request receiving element, processing unit and address transmitting element;
The request receiving element is used to receive requirement switches to request from required IP address, PS territory to target access gateway application UE;
Processing unit is used for to the described IP of target access gateway application address, and the described IP address returned of receiving target IAD;
The address transmitting element is used for described IP address is sent;
Described communication equipment further comprises: indicating member is set up in business information receiving element and carrying,
The business information receiving element is used to receive the user service information that send the outside;
Indicating member is set up in carrying, is used for described user service information is sent to target P CRF.
Perhaps described communication equipment further comprises: beared information issues the unit;
Described beared information receiving element is further used for receiving and described voice dedicated bearing relevant parameter;
Beared information issues the unit, is used for being handed down to target BS with described IP address with voice dedicated bearing relevant parameter, or directly is handed down to UE.
16. communication equipment according to claim 15 is characterized in that, processing unit comprises: gateway is searched unit, application unit and beared information receiving element;
Gateway is searched the unit, is used for the IP application IP addresses indication information that received request is carried according to the request receiving element, finds and the corresponding target access gateway of this IP application IP addresses indication information;
Application unit, being used to ask this target access gateway is that UE distributes described IP address;
The beared information receiving element is used for the described IP address that the receiving target IAD returns.
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| CN102076043B (en) * | 2009-11-24 | 2015-09-16 | 中兴通讯股份有限公司 | A kind of method and system realizing Incoming reorientation |
| CN102238158B (en) * | 2010-04-26 | 2016-02-10 | 中兴通讯股份有限公司 | The implementation method of reverse single-standby service continuity and system |
| CN102238677B (en) * | 2010-04-26 | 2016-04-13 | 中兴通讯股份有限公司 | The implementation method of single radio voice call continuity and system |
| CN102238676B (en) | 2010-04-30 | 2014-02-19 | 华为技术有限公司 | Method for switching from circuit switching domain to packet switching domain, equipment and communication system |
| CN102238678B (en) * | 2010-05-04 | 2016-01-20 | 中兴通讯股份有限公司 | Single radio voice call continuity realization method and system |
| CN102244910B (en) * | 2010-05-10 | 2014-12-10 | 中兴通讯股份有限公司 | Communication system and method for enhancing single radio voice call service continuity |
| CN102387557B (en) | 2010-08-30 | 2014-09-17 | 华为技术有限公司 | Processing method, equipment and system of reverse single wireless voice calling continuity |
| CN103905378B (en) * | 2012-12-25 | 2017-04-12 | 华为技术有限公司 | Data transmission method and device thereof |
| CN104980982A (en) * | 2014-04-01 | 2015-10-14 | 中兴通讯股份有限公司 | Method and device switching voice service between CS domain and PS domain and mobile terminals |
| EP3534618A4 (en) * | 2016-10-27 | 2020-06-03 | Evixar Inc. | Content reproduction program and content reproduction apparatus |
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