CN101400090A - Method and system for communication service switching - Google Patents
Method and system for communication service switching Download PDFInfo
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- CN101400090A CN101400090A CNA2007101627674A CN200710162767A CN101400090A CN 101400090 A CN101400090 A CN 101400090A CN A2007101627674 A CNA2007101627674 A CN A2007101627674A CN 200710162767 A CN200710162767 A CN 200710162767A CN 101400090 A CN101400090 A CN 101400090A
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Abstract
The invention discloses a method of switching communication service, comprising packet commutative field switch and packet switching and circuit commutative field switch. The method comprises that: in the packet commutative field switch, an object base station controller receives switching indication information of the packet switching and the circuit commutative field switch from a source moving management entity and/or a user surface entity; after the object base station controller completes the packet commutative field switch, the object base station controller determines to switch from the packet switching to the circuit commutative field according to the ability of the object district, the dynamic condition and the indication information of the received packet switching and the circuit commutative field switch. The invention also discloses a system of switching communication service. According to the invention, the high-side user equipment is ensured to obtain the resource preferentially, service quality requirement of the communication service of the high-side user equipment is ensured, thereby increasing satisfaction degree of the user.
Description
Technical field
The present invention relates to the handoff technique of communicating by letter, the method and system that particularly a kind of communication service is switched.
Background technology
At World Interoperability for Microwave Access, WiMax (WiMAX, World Interoperability forMicrowave Access) data rate index of system uplink 50M, descending 100M such as, in order to guarantee the competitiveness of 10 years wireless technologys from now on, 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) normal structure has been released new generation network system architecture evolution/long-term evolution plan (SAE/LTE, System Architecture Evolution/Long TermEvolved).SAE/LTE network evolution items inserts (HSDPA based on high speed downlink packet, HighSpeed Downlink Packet Access), on the basis of original HSDPA and enhanced uplink systems such as (EUL, Enhanced Uplink), aspects such as delay, user data rate, power system capacity/covering and cost are further optimized.
Fig. 1 is the network architecture structural representation of existing SAE/LTE evolution system.As shown in Figure 1, this evolution system comprises: subscriber equipment (UE, User Equipment), the UMTS Terrestrial radio access network (E-UTRAN of evolution, Evolved UMTS Territorial Radio Access Network) and the core net (EPC, Evolved Packet Core) of evolution, UE links to each other by the LTE-Uu interface with E-UTRAN, E-UTRAN links to each other by the S1 interface with EPC, EPC links to each other with outer data network, wherein
E-UTRAN is made up of the Node B (ENB, Evolved Node B) of evolution; Interconnect by X2 interface between ENB, be responsible for providing user-plane function (the packet data convergence protocol PDCP of evolution wave point to UE, Packet Data Convergence Protocol/ Radio Link control RLC, Radio Link Control/ media access control MAC, Media Access Control/ physical layer PHY, Physics) and control plane function (radio resource control RRC, Radio Resource Control).
EPC is connected with ENB by the S1 interface, be used for customer location management in the system, functions such as service management, and the exchange of realization and external network and routing function, comprise: mobile management entity (MME, Mobility Management Entity), gateway (Serving SAE Gateway), packet data network gateway (PDN Gateway, Packet Data Network SAE Gateway), "Policy and Charging Rules Function entity (PCRF, Policy and Charging Rules Function) and home subscriber system (HSS, Home Subscriber System), its core is made up of MME and SAE Gateway two parts, and the S1 interface supports ENB to be connected with multi-to-multi between MME/SAE Gateway.
MME is the control plane node of EPC, bear the management function of UE context and user plane carrying, link to each other with EUTRAN, gateway, home subscriber system and outside GPRS serving GPRS support node (SGSN, Serving General Packet Radio Service Support Node) respectively by S1-MME interface, S11 interface, S6a interface and S3 interface.
SAE Gateway is the user plane node of EPC, bears user data transport function, comprises PDN Gateway and gateway, and wherein, PDN Gateway links to each other with outer data network, PCRF and gateway respectively by SGi interface, S7 interface and S5 interface; Gateway links to each other with PDN Gateway, SGSN, MME and E-UTRAN respectively by S5 interface, S4 interface, S11 interface and S1-U interface.
PCRF links to each other with outer data network with PDN Gateway respectively with the Rx+ interface by the S7 interface.
In the network architecture of existing SAE/LTE evolution system, LTE is a pure packet switching (PS, Packet Switching) network in territory, since do not exist with the 2G/3G system in (the MSC of mobile switching centre, Mobile Switching Center) corresponding network element, therefore, in the SAE/LTE in future evolution system, user's voice service can only realize by the mode of PS territory carrying with VoIP.Consequent problem is, how to guarantee seamless continue of speech business between LTE evolution system and traditional 2G/3G system.
Can't be directly switch to the problem of legacy network CS territory carrying from the VoIP of LTE PS territory carrying at speech business, having proposed a standard P S territory at present switches and continuous voice call (VCC, VoiceCall Continuity) the territory flow path switch combine two the step handover scheme, i.e. PS territory switch step and VCC territory translate phases.
The schematic flow sheet that Fig. 2 switches for existing PS territory.Referring to Fig. 2, an ongoing VoIP is professional to be needed when the 2G network switches when source ENB adjudicates, and at first initiates the PS switching flow of standard to target base station controller (BSC, BaseStation Controller), and this flow process comprises:
Step 201, UE is to ENB periodicity reporting measurement reports message;
Step 202, the target BS C that the measurement report message judgement UE that ENB reports according to UE should switch sends handoff request message to MME, initiates the PS territory switching flow of LTE evolution system to the GERAN network;
Step 203, MME, and/or after user entity (UPE, User Plane Entity) receives the handoff request message that ENB sends, commentaries on classics handoff request message before target SGSN sends;
Step 204, target SGSN is according to the packet data protocol (PDP that carries in the preceding commentaries on classics handoff request message, Packet Data Protocol) context, service quality (the QoS of voip conversation of current switching derives, Quality of Service) requirement, and send switch indicating information to target BS C according to this qos requirement, initiate carrying and set up flow process;
Step 205, target BS C is a UE distributing user planes carry resource, and switches the indication acknowledge message to the target SGSN feedback;
Step 206, target SGSN receive switches the indication acknowledge message, to source MME, and/or changes switching response message before the UPE feedback;
Step 207, source MME, and/or change switching response message before the UPE reception, and send switching command message to UE, carrying target BS C is the relevant information of the RAB (RAB, RadioAccess Bearer) of UE distribution;
Step 208, after switching was finished, UE sent handoff completion message to objective network.
After PS territory switching flow is finished, the BSC of GERAN network can be according to the Target cell ability such as the double-transmission mode (DTM of current switching, Dual transfer mode), reduce Transmission Time Interval (RTTI, and the present dynamic resource situation Reduced Transmission Timing Interval) etc., whether judgement is initiated to GERAN circuit switching (CS, Circuit Switching) territory flow path switch, for wireless side, the PS territory comes down to the upright process of reconstruction in a CS territory to the territory flow path switch in CS territory, this process is the bearing resource that UE distributes the CS territory, makes network to provide service quality better speech business for UE in the CS territory.
Fig. 3 is existing VCC territory transformation flow schematic diagram.Referring to Fig. 3, this flow process comprises:
Step 301, UE sends SETUP message to MSC, initiates the originating call flow process of standard, carries VCC translation number VDN number, is used to indicate the destination of current calling;
Step 302, MSC receives SETUP message, by using (CAMEL with the customization of mobile network enhancing logic, Customized Applications for Mobile Network EnhancedLogic) intelligent network is mutual, carry out CS territory initialize routine, by the public service identity (PSI, Public Service Identification) of VDN number derivation VCC application server number;
Step 303, MSC is to Media Gateway Controller (MGCF, Media Gateway ControlFunction) sends initial address message, the terrestrial links bearing resource between the media gateway MGW that MSC and MGCF control is set up in triggering, carry VCC Access Layer (AS in this message, AccessStratum) PSi number is in order to indicate the destination of current call setup;
Step 306, territory translation function entity (DTF, Domain Transfer Function) is carried out the territory translation function, promptly by sending Re-INVITE message to opposite end UE, notifies the link information of newly-established CS territory access tributary, carries out access tributary and upgrades;
Step 307, DTF discharges original PS territory access tributary.
The professional handover scheme of existing VoIP is according to cell ability, and the current dynamic condition of sub-district, select at random between the UE that target BS C carries out changing in the territory at needs, part of V oIP session is transformed into GERAN CS territory from GERAN PS territory, because it is not signatory with reference to the user, and information such as source-end networks demand, make the higher UE of priority be retained in the PS territory, adopt the relatively poor VoIP of service quality to come carry voice traffic; And the lower UE of priority is converted to the CS territory, uses the higher CS voice of service quality.
Summary of the invention
In view of this, the method that the embodiment of the invention provides a kind of communication service to switch, the demanding UE that guarantees service quality preferentially obtains resource, improves user satisfaction.
The system that the embodiment of the invention also provides a kind of communication service to switch, target BS C takes corresponding territory switching strategy at the session of different UEs, thereby has guaranteed the service quality of the communication service of high-end UE.
For achieving the above object, the technical scheme of the embodiment of the invention specifically is achieved in that
The method that a kind of communication service is switched comprises the conversion of packet-switched domain switching and packet switching and circuit commutative field, and this method also comprises:
In the packet-switched domain handoff procedure, target base station controller receives from the source mobile management entity, and/or the packet switching of user entity and circuit commutative field conversion indication information;
Target base station controller packet-switched domain switch finish after, change indication information according to the packet switching of ability, dynamic condition and the reception of Target cell with circuit commutative field, determine to carry out the conversion of packet switching to circuit commutative field.
The system that a kind of communication service is switched, be used for the conversion of packet-switched domain switching and packet switching and circuit commutative field, the Node B, the source mobile management entity that comprise evolution, and/or user entity, target GPRS serving GPRS support node SGSN and target base station controller
The source mobile management entity, and/or user entity is used for carrying packet switching and circuit commutative field conversion indication information in preceding commentaries on classics handoff request message, is sent to target SGSN;
Target SGSN is used to receive packet switching and circuit commutative field conversion indication information, is sent to target base station controller;
Target base station controller, the ability, the dynamic condition that are used for according to Target cell reach packet switching and the circuit commutative field conversion indication information that receives from target SGSN, determine to carry out the conversion of packet switching to circuit commutative field.
As seen from the above technical solution, the method and system that a kind of communication service of the embodiment of the invention is switched, call out by UE initiation session in the LTE evolution system, MME, and/or determine the session-level of territory conversion demand sign or current sessions or carry the CAMEL-Subscription-Information of UE according to carrier policy and user signing contract information, make that target BS C can be according to the CAMEL-Subscription-Information of territory conversion demand sign or session-level or UE, at different sessions, use different territory switching strategies, make high-end UE preferentially obtain resource, guarantee the QoS requirement of high-end UE communication service, improved user satisfaction.
Description of drawings
Fig. 1 is the network architecture structural representation of existing SAE/LTE evolution system.
The schematic flow sheet that Fig. 2 switches for existing PS territory.
Fig. 3 is existing VCC territory transformation flow schematic diagram.
The system configuration schematic diagram that Fig. 4 switches for embodiment of the invention communication service.
Fig. 5 is the method flow schematic diagram that the embodiment of the invention one communication service is switched.
Fig. 6 is the method flow schematic diagram that the embodiment of the invention two communication services are switched.
Fig. 7 is the method flow schematic diagram that the embodiment of the invention three communication services are switched.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
The embodiment of the invention is to call out by UE initiation session in the LTE evolution system, source MME, and/or UPE determines the session-level of territory conversion demand sign or current sessions according to source-end networks demand, carrier policy and user signing contract information or carries the CAMEL-Subscription-Information of UE, make that target BS C can be according to territory conversion demand sign or session-level or CAMEL-Subscription-Information, at different sessions, use different territory switching strategies.
To achieve these goals, the present invention proposes the system that a kind of communication service is switched.
The system configuration schematic diagram that Fig. 4 switches for embodiment of the invention communication service.Referring to Fig. 4, this system comprises: ENB, source MME, and/or UPE, target SGSN and target BS C, wherein,
ENB is used to receive the measurement report message that UE sends, and the target BS C according to the measurement report message judgement UE that receives should switch sends handoff request message to source MME/UPE; The preceding commentaries on classics handover request ack message that reception sources MME/UPE sends sends to UE;
Source MME, and/or UPE are used to receive the handoff request message that ENB sends, and change handoff request message before target SGSN sends, and carry that conversion demand in territory identifies or the session-level of current sessions or carry the CAMEL-Subscription-Information of UE; The preceding commentaries on classics handover request ack message that receiving target SGSN sends sends to ENB;
Target SGSN, change handoff request message before being used to receive, according to the PDP Context that carries in the message, the derive session QoS requirement of current switching, and send switch indicating information to target BS C according to this qos requirement, carry source MME, and/or the session-level of the territory conversion demand sign that sends over of UPE or current sessions or carry the CAMEL-Subscription-Information of UE; The switching indication acknowledge message of receiving target BSC feedback is changeed handover request ack message before source MME and/or UPE feedback;
Target BS C is used to receive switch indicating information, is UE distributing user planes carry resource, switches the indication acknowledge message to the target SGSN feedback; Reception is from the handoff completion message of UE, according to the dynamic condition of Target cell, whether the session-level of territory conversion demand sign or current sessions or the CAMEL-Subscription-Information that carries UE are adjudicated this session needs to carry out the territory conversion, if desired, send triggering message to UE, trigger UE and initiate the territory flow path switch.
For three embodiment, be elaborated below to using the specific embodiment of the present invention.
Embodiment one:
In the present embodiment, when UE initiates voip call in the LTE evolution system, source MME, and/or UPE will determine the session-level (session priority) of current voip conversation according to carrier policy and user signing contract information, by the voip conversation rank, source MME, and/or UPE can determine corresponding territory conversion demand indication (Domain Transfer required flag), and switch message by the preceding commentaries on classics between system and be sent to target SGSN, target SGSN receives the preceding commentaries on classics of carrying the indication of territory conversion demand and switches message, the indication of territory conversion demand is sent to target BS C, and target BS C is according to the territory conversion demand indication that receives, the ability information of Target cell with and present dynamic condition judgement whether carry out the territory conversion.
Fig. 5 is the method flow schematic diagram that the embodiment of the invention one communication service is switched.Referring to Fig. 5, this flow process comprises:
Step 501, UE is to ENB periodicity reporting measurement reports message;
Step 502, the target BS C that the measurement report message judgement UE that ENB reports according to UE should switch, to source MME, and/or UPE transmission PS territory handoff request message, initiate the PS territory switching flow of LTE evolution system to the GERAN network;
Step 503, source MME, and/or after UPE receives the PS territory handoff request message that ENB sends, commentaries on classics handoff request message before target SGSN sends;
In this step, preceding commentaries on classics handoff request message carries according to source MME, and/or the territory conversion demand identification information of UPE network operator policy and user signing contract information derivation.
Step 504, target SGSN be according to the PDP Context that carries in the preceding commentaries on classics handoff request message, the session QoS requirement of the current switching of deriving, and send switch indicating information to target BS C according to this qos requirement, initiate carrying and set up flow process;
In this step, the session of current switching can be the voip conversation of current switching, also can be the video session or the Multimedia session of current switching, it can also be the data service session of current switching, follow-up voip conversation with current switching is an example, target SGSN is carried source MME in the switch indicating information that target BS C sends, and/or the demand identification information is changed in the territory that UPE sends over.
Step 505, target BS C receives switch indicating information, is UE distributing user planes carry resource, and switches the indication acknowledge message to the target SGSN feedback;
Step 506, target SGSN receive switches the indication acknowledge message, to source MME, and/or changes handover request ack message before the UPE feedback;
Step 507, source MME, and/or UPE sends switching command message to UE has comprised target BS C and is the relevant information of the radio bearer that UE distributes in this message;
Step 508, after switching was finished, UE sent handoff completion message to target BS C;
Step 509, target BS C receives handoff completion message, according to the dynamic condition of Target cell, source MME, and/or whether this voip conversation of UPE territory conversion demand sign judgement need to carry out the territory conversion, if, execution in step 510, otherwise, process ends;
Step 510, target BS C sends territory transition trigger message to UE, triggers UE and initiates the territory flow path switch.
After UE initiates the territory flow path switch, for wireless side, the PS territory comes down to the upright process of reconstruction in a CS territory to the territory flow path switch in CS territory, this process is the bearing resource that UE distributes the CS territory, make network to provide service quality better speech business for UE in the CS territory, identical with existing procedure, do not repeat them here.
As seen from the above-described embodiment, because source MME, and/or UPE provides according to carrier policy and the definite territory conversion demand sign of user signing contract information to target BS C, make that target BS C can be according to this territory conversion demand sign, distinguish the voip conversation of different priorities, and adopt corresponding territory switching strategy, guaranteed the QoS requirement of high priority session subscriber.
Concrete voip conversation territory switching strategy is as shown in table 1.
Table 1
| Territory conversion demand sign | The voip conversation rank | The territory switching strategy |
| 00 | The high priority session | This type of session must be carried out the territory flow path switch, to guarantee the service quality of voiceband user |
| 01 | The high medium priority session | By target BS C according to factors such as the ability of Target cell and dynamic conditions judgement whether carry out the |
| 10 | Lower priority session | In the retainable GERAN PS of this type of session territory |
| 11 | Keep |
Embodiment two:
In embodiment one, when UE initiates voip call in the LTE evolution system, source MME, and/or UPE determines the session-level of current voip conversation according to carrier policy and user signing contract information, by current voip conversation rank, source MME, and/or UPE determines corresponding territory conversion demand sign, and switch message by the forwarding between system and be sent to target SGSN, in the practical application, source MME, and/or UPE also can determine the session-level of current voip conversation according to carrier policy and user signing contract information, the session-level information of current voip conversation is switched message by the preceding commentaries on classics between system be sent to target SGSN, target SGSN receives the preceding commentaries on classics of carrying session-level information and switches message, the session-level information of current voip conversation is sent to target BS C, and target BS C is according to the session-level information that receives, the ability information of Target cell with and present dynamic condition judgement whether carry out the territory conversion.
Fig. 6 is the method flow schematic diagram that the embodiment of the invention two communication services are switched.Referring to Fig. 6, its flow process and Fig. 5 are similar, do not repeat them here.Different with Fig. 5 is,
In step 603, source MME, and/or after UPE receives the PS territory handoff request message that ENB sends, before target SGSN sends, change handoff request message, carry session-level information according to the current voip conversation of source-end networks carrier policy and user signing contract information derivation;
In step 604, target SGSN is according to the PDP Context that carries in the preceding commentaries on classics handoff request message, the derive qos requirement of voip conversation of current switching, and send switch indicating information to target BS C according to this qos requirement, carry source MME, and/or the session-level information of the current voip conversation that sends over of UPE, initiate carrying and set up flow process;
And in step 609, target BS C receives handoff completion message, dynamic condition according to Target cell, the session-level information of current voip conversation adjudicate this voip conversation whether need to carry out territory conversion: BSC according to the ability of Target cell with and the present dynamic condition determine that needs carry out the session-level threshold value of the voip conversation of territory conversion, if if the session-level of the voip conversation of incision is higher than this threshold value, execution in step 610, otherwise, process ends;
Step 610, target BS C sends territory transition trigger message to UE, triggers UE and initiates the territory flow path switch.
After UE initiates the territory flow path switch, for wireless side, the PS territory comes down to the upright process of reconstruction in a CS territory to the territory flow path switch in CS territory, this process is the bearing resource that UE distributes the CS territory, make network to provide service quality better speech business for UE in the CS territory, identical with existing procedure, do not repeat them here.
Embodiment three:
In the present embodiment, when UE initiates in the LTE evolution system to the switching flow of the voip conversation of GERAN, source MME, and/or UPE is sent to target SGSN by the preceding commentaries on classics switching message between system, carry the CAMEL-Subscription-Information of UE, message is switched in the preceding commentaries on classics that target SGSN receives the CAMEL-Subscription-Information carry UE, and the CAMEL-Subscription-Information of UE is sent to target BS C, target BS C according to the ability information of the CAMEL-Subscription-Information of the UE that receives, Target cell with and the judgement of present dynamic condition whether carry out the territory conversion.
Fig. 7 is the method flow schematic diagram that the embodiment of the invention three communication services are switched.Referring to Fig. 7, this flow process comprises:
Step 701, UE is to ENB periodicity reporting measurement reports message;
Step 702, the target BS C that the measurement report message judgement UE that ENB reports according to UE should switch, to source MME, and/or UPE transmission PS territory handoff request message, initiate the PS territory switching flow of LTE evolution system to the GERAN network;
Step 703, source MME, and/or after UPE receives the PS territory handoff request message that ENB sends, commentaries on classics handoff request message before target SGSN sends;
In this step, preceding commentaries on classics handoff request message carries the CAMEL-Subscription-Information of UE.
Step 704, target SGSN be according to the PDP Context that carries in the preceding commentaries on classics handoff request message, the qos requirement of the voip conversation of the current switching of deriving, and send switch indicating information to target BS C according to this qos requirement, initiate carrying and set up flow process;
In this step, target SGSN is carried source MME in the switch indicating information that target BS C sends, and/or the CAMEL-Subscription-Information of the UE that sends over of UPE.
Step 705, target BS C receives switch indicating information, is UE distributing user planes carry resource, and switches the indication acknowledge message to the SGSN feedback;
Step 706, SGSN receives and switches the indication acknowledge message, to source MME, and/or changes handover request ack message before the UPE feedback;
Step 707, source MME, and/or UPE sends switching command message to UE has comprised target BS C and is the relevant information of the radio bearer that UE distributes in this message;
Step 708, after switching was finished, UE sent handoff completion message to target BS C;
Step 709, target BS C receives handoff completion message, and according to the dynamic condition of Target cell, whether the CAMEL-Subscription-Information of UE is adjudicated this voip conversation needs to carry out the territory conversion, if, execution in step 710, otherwise, process ends;
Step 710, target BS C sends territory transition trigger message to UE, triggers UE and initiates the territory flow path switch.
After UE initiates the territory flow path switch, for wireless side, the PS territory comes down to the upright process of reconstruction in a CS territory to the territory flow path switch in CS territory, this process is the bearing resource that UE distributes the CS territory, make network to provide service quality better speech business for UE in the CS territory, identical with existing procedure, do not repeat them here.
In the practical application, source MME, and/or UPE can be the priority-level of UE to the CAMEL-Subscription-Information of the UE of target SGSN transmission, corresponding target BS C territory conversion mode decision scheme is as follows: after the switching flow of voip conversation is finished, target BS C according to the ability of Target cell with and the present dynamic condition determine that needs carry out the UE priority-level threshold value of territory conversion, if the priority-level of the UE of incision is higher than this threshold value, then the territory flow path switch is initiated in target BS C judgement;
Source MME, and/or the CAMEL-Subscription-Information of the UE that sends to target SGSN of UPE also can be the territory switching strategy, target BS C carries out the conversion of corresponding territory according to the territory switching strategy of the different UEs of storage in advance, satisfies the QoS requirement of high-priority users.
Concrete voip conversation territory switching strategy is as shown in table 2.
Table 2
| The UE priority tag | The UE priority-level | The territory switching strategy |
| 00 | High priority | The voip conversation of this type of UE must be carried out the territory flow path switch, to guarantee the service quality of voiceband user |
| 01 | High medium priority | The voip conversation of this type of UE by target BS C according to factors such as the ability of Target cell and dynamic conditions judgement whether carry out the |
| 10 | Low priority | The voip conversation of this type of UE can remain in the GERAN PS territory, need not carry out performance optimization |
| 11 | Keep |
In the foregoing description one to embodiment three, source MME, and/or the preceding commentaries on classics handoff request message that sends of UPE also the portability packet switching change indication information with circuit commutative field, be used for whether packet-switched domain is indicated to the circuit domain conversion, comprise territory conversion demand sign or the session-level of current sessions or the CAMEL-Subscription-Information of UE.
The method and system that a kind of communication service of the embodiment of the invention is switched, in the LTE evolution system, initiate voip call by UE, source MME, and/or UPE is according to the source-end networks demand, carrier policy and user signing contract information are determined the session-level of territory conversion demand sign or current voip conversation or are carried the CAMEL-Subscription-Information of UE, make that target BS C can be according to territory conversion demand sign or session-level or CAMEL-Subscription-Information, at different voip conversations, adopt corresponding territory switching strategy, make high-end UE preferentially obtain resource, guarantee the QoS requirement of high-end UE speech business, improved user satisfaction.
More than lift preferred embodiment; the purpose, technical solutions and advantages of the present invention are further described; institute is understood that; the above only is preferred embodiment of the present invention; not in order to restriction the present invention; within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the method that communication service is switched comprises the conversion of packet-switched domain switching and packet switching and circuit commutative field, it is characterized in that this method also comprises:
In the packet-switched domain handoff procedure, target base station controller receives from the source mobile management entity, and/or the packet switching of user entity and circuit commutative field conversion indication information;
Target base station controller packet-switched domain switch finish after, change indication information according to the packet switching of ability, dynamic condition and the reception of Target cell with circuit commutative field, determine to carry out the conversion of packet switching to circuit commutative field.
2, the method for claim 1 is characterized in that, described target base station controller receives from the source mobile management entity, and/or the step of the packet switching of user entity and circuit commutative field conversion indication information comprises:
The source mobile management entity, and/or user entity receives the packet-switched domain handoff request message from the Node B transmission of evolution, before target GPRS serving GPRS support node SGSN sends, change handoff request message, carry packet switching and circuit commutative field conversion indication information;
Target SGSN sends switch indicating information according to the block data protocol context that carries in the preceding commentaries on classics handoff request message to target base station controller, carries packet switching and circuit commutative field conversion indication information.
3, method as claimed in claim 1 or 2 is characterized in that, described packet switching and circuit commutative field conversion indication information comprise: territory conversion demand identification information or the session-level information of current sessions or the CAMEL-Subscription-Information of subscriber equipment.
4, method as claimed in claim 3, it is characterized in that, described source mobile management entity, and/or user entity determines the session-level of current sessions according to carrier policy and user signing contract information, determines corresponding territory conversion demand sign by the session-level of current sessions.
5, method as claimed in claim 3 is characterized in that, described territory conversion demand identification information comprises territory conversion demand sign and corresponding territory switching strategy.
6, method as claimed in claim 3, it is characterized in that, the CAMEL-Subscription-Information of described subscriber equipment comprises the priority-level of subscriber equipment, describedly determine that carrying out packet switching comprises to the step of the conversion of circuit commutative field: target base station controller determines that according to the ability and the dynamic condition of Target cell needs carry out the subscriber equipment priority-level threshold value of territory conversion, if the priority-level of the subscriber equipment that receives is higher than the subscriber equipment priority-level threshold value that need carry out the territory conversion, then determine to carry out the conversion of packet switching to circuit commutative field.
7, method as claimed in claim 3, it is characterized in that, described packet switching and circuit commutative field conversion indication information are the session-level information of current sessions, describedly determine that carrying out packet switching comprises to the step of the conversion of circuit commutative field: target base station controller determines that according to the ability and the dynamic condition of Target cell needs carry out the session-level threshold value of territory conversion, if the session-level of the current sessions that receives is higher than the session-level threshold value that need carry out the territory conversion, then determine to carry out the conversion of packet switching to circuit commutative field, or, determine to carry out the conversion of packet switching according to the territory switching strategy of the priority-level correspondence of subscriber equipment to circuit commutative field.
8, the method for claim 1 is characterized in that, described method further comprises, is determining to carry out packet switching after the conversion of circuit commutative field, sends territory transition trigger message to subscriber equipment, triggers and finish the territory conversion.
9, a kind of system of communication service switching, be used for the conversion of packet-switched domain switching and packet switching and circuit commutative field, the Node B, the source mobile management entity that comprise evolution, and/or user entity, target GPRS serving GPRS support node SGSN and target base station controller, it is characterized in that, described source mobile management entity, and/or user entity is used for carrying packet switching and circuit commutative field conversion indication information in preceding commentaries on classics handoff request message, is sent to target SGSN;
Described target SGSN is used to receive packet switching and circuit commutative field conversion indication information, is sent to target base station controller;
Described target base station controller, the ability, the dynamic condition that are used for according to Target cell reach packet switching and the circuit commutative field conversion indication information that receives from target SGSN, determine to carry out the conversion of packet switching to circuit commutative field.
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| CN2007101627674A CN101400090B (en) | 2007-09-30 | 2007-09-30 | Method and system for communication service switching |
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