CN102811471A

CN102811471A - Internetwork transferring method for priority session accessing and user equipment

Info

Publication number: CN102811471A
Application number: CN2011101447540A
Authority: CN
Inventors: 衣强; 金辉
Original assignee: Huawei Device Co Ltd
Current assignee: Huawei Device Co Ltd
Priority date: 2011-05-31
Filing date: 2011-05-31
Publication date: 2012-12-05
Anticipated expiration: 2031-05-31
Also published as: CN102811471B

Abstract

The embodiment of the invention provides an internetwork transferring method for priority session accessing and user equipment (UE). The internetwork transferring method for priority session accessing comprises the following steps: allowing the UE to transfer from a source packet switched domain to a target circuit switched domain, and determining that a session on the UE has a priority characteristic in the source packet switched domain; and sending connection management service requesting information to a mobile switching center server of the target circuit switched domain by the user equipment, wherein the connection management service requesting information carries priority level information of the session on the UE in the source packet switched domain. According to the embodiment of the invention, when called UE with a priority session transfers from the packet switched domain to the circuit switched domain, the priority of the session on called UE is kept unchanged.

Description

The method and the subscriber equipment that shift between priority session Access Network

Technical field

The embodiment of the invention relates to communication technical field, relates in particular to the method and the subscriber equipment that shift between a kind of priority session Access Network.

Background technology

Multimedia priority service (Multimedia Priority Service; Hereinafter to be referred as: MPS) can make national security or urgency traffic user through public network the priority conversational services is provided, this priority conversational services can realize proper communication under network congestion.Usually MPS user is the governmental certification focal pointe; When major accident or disaster generation; These focal pointes need and handle accident response in time usually; Therefore give these user priority level characteristics, network side is this MPS user's of priority treatment conversation request just, realizes the normal delivery of key message.

The user of MPS of having contracted can use MPS contracted user equipment (MPS-subscribed User Equipment; Hereinafter to be referred as: MPS-subscribed UE) initiate internet protocol multimedia subsystem (Internet Protocol Multimedia Subsystem with priority; Hereinafter to be referred as: IMS) session or use equipment (the User Equipment of domestic consumer; Hereinafter to be referred as: UE) initiate IMS session with priority; And the indication information that in conversation request, to carry this IMS session be the priority session; Thereby network equipment can be according to the priority indication information of this session; This conversation request of priority treatment and be preferably this session Resources allocation, network equipment also can be verified the priority conversation request and handles according to the priority service CAMEL-Subscription-Information in addition.

In addition, at circuit switching (Circuit Switched; Hereinafter to be referred as: CS) the contracted UE of priority service of territory can initiate session with priority in the CS territory, and calling UE adds the prefix of representing priority service before called number, (the Mobile Switching Center of mobile switching centre; Hereinafter to be referred as: MSC) server is after receiving that request (setup) message is set up in the session that has priority indication prefix, and checking user's priority subscription data, and acquisition user's priority level are passed to the opposite end.

Callee side MSC server receives that the session that has priority sets up request message, carries with setting up according to priority indication priority allocation radio frequency resource, accomplish call out UE after, send setup message to called UE, accomplish session and set up process.

Preferential and the resource that strengthens is seized (enhanced Multi-Level Precedence and Pre-emption in advance; Hereinafter to be referred as: eMLPP) business is the signing service in CS territory, and the professional user of the eMLPP that contracted can initiate calling with priority in the CS territory, and calling UE is at connection management service request (Connect Management Service Request; Hereinafter to be referred as: CM Service Request) in the message to the priority level of network side indication session, called UE can obtain the priority level of this session and preserve the priority level of this session from setup message.

But find the process inventor who realizes the embodiment of the invention: in the prior art, the called UE with priority session is at packet switching (Packet Switched; Hereinafter to be referred as: when PS) shifting between territory and CS territory; No matter whether this called UE has priority signing service (eMLPP that comprises the CS territory is professional); When called UE was received the conversation request with priority, this conversation request with priority should be handled according to the priority characteristic and the priority-level of calling UE.So when called UE carries out shifting between Access Network; This called UE can be initiated a new conversation request at the target access network that shifts; The priority characteristic and the priority-level of the new conversation request that called UE is initiated will be provided with according to the priority characteristic and the priority-level of called UE; If the priority-level of not signatory priority service of called UE or called UE is different with the priority-level of calling UE; Called UE will occur and between Access Network, shift the inconsistent problem of priority that front and back can't keep session priority or session, or can't handle the problem of the session on this called UE according to the priority session.

Summary of the invention

The embodiment of the invention provides method and the subscriber equipment that shifts between a kind of priority session Access Network; When between packet-switched domain and circuit commutative field, shifting, guarantee that the priority of session on this called subscriber equipment is constant with the called subscriber equipment of realizing having the priority session.

The embodiment of the invention provides the method that shifts between a kind of priority session Access Network, comprising:

Subscriber equipment is shifted to the objective circuit switching domain by the source packet-switched domain, and packet-switched domain has the priority characteristic in said source to confirm session on the said subscriber equipment;

Said subscriber equipment sends the connection management business request information to the Mobile Switching Center Server of said objective circuit switching domain; Said connection management business request information is carried the priority-level information of the said session packet-switched domain in said source on the said subscriber equipment; So that said Mobile Switching Center Server is known the priority-level information of the said session packet-switched domain in said source on the said subscriber equipment; Said session on the said subscriber equipment is transferred to said objective circuit switching domain by said source packet-switched domain, and keep the priority characteristic and the priority-level information of said session packet-switched domain in said source.

The embodiment of the invention also provides the method that shifts between a kind of priority session Access Network, comprising:

The Mobile Switching Center Server of objective circuit switching domain receives the connection management business request information that subscriber equipment sends; Said connection management business request information is that said subscriber equipment is shifted to said objective circuit switching domain by the source packet-switched domain; Confirm that session on the said subscriber equipment is sent after said source packet-switched domain has the priority characteristic, said connection management business request information is carried the priority-level information of the said session packet-switched domain in said source on the said subscriber equipment;

Said Mobile Switching Center Server is transferred to said objective circuit switching domain with the said session on the said subscriber equipment by said source packet-switched domain, and when said session is shifted, keeps the priority characteristic and the priority-level information of said session packet-switched domain in said source.

The priority-level information of the session packet-switched domain on the subscriber equipment that the Mobile Switching Center Server receiving internet protocol multi-media sub-system network entity of objective circuit switching domain sends in the source;

Said Mobile Switching Center Server sends resource allocation request message to the base station sub-system of said objective circuit switching domain; And in said resource allocation request message, carry said priority-level information; So that said base station sub-system is preferably said resource allocation request message Resources allocation, the said session on the said subscriber equipment is transferred to said objective circuit switching domain by said source packet-switched domain.

Proxy call conversation control function entity receives the session transfer request message that subscriber equipment sends, and said session transfer request message is carried the session of said subscriber equipment and shifted sign and priority session indication information;

Said proxy call conversation control function entity shifts sign according to said session and confirms that said session transfer request message is that circuit commutative field is after the session transfer request message of packet-switched domain; Said session transfer request message is sent to the internet protocol multimedia subsystem network entity; So that the session on the said subscriber equipment is transferred to said packet-switched domain by said circuit commutative field, said session transfer request message carries said priority session indication information and sign is shifted in session.

The embodiment of the invention also provides a kind of subscriber equipment, comprising:

First determination module, be used for said subscriber equipment by the source packet-switched domain when the objective circuit switching domain shifts, packet-switched domain has the priority characteristic in said source to confirm session on the said subscriber equipment;

First sending module; Be used for confirming that at said first determination module session on the said subscriber equipment is after said source packet-switched domain has the priority characteristic; Mobile Switching Center Server to said objective circuit switching domain sends the connection management business request information; Said connection management business request information is carried the priority-level information of the said session packet-switched domain in said source on the said subscriber equipment; So that said Mobile Switching Center Server is known the priority-level information of the said session packet-switched domain in said source on the said subscriber equipment; Said session on the said subscriber equipment is transferred to said objective circuit switching domain by said source packet-switched domain, and keep the priority characteristic and the priority-level information of said session packet-switched domain in said source.

The embodiment of the invention also provides a kind of Mobile Switching Center Server, comprising:

The 4th receiver module; Be used to receive the connection management business request information that subscriber equipment sends; Said connection management business request information is said subscriber equipment by the source packet-switched domain when said objective circuit switching domain shifts; Confirm that session on the said subscriber equipment is sent after said source packet-switched domain has the priority characteristic, said connection management business request information is carried the priority-level information of the said session packet-switched domain in said source on the said subscriber equipment;

The session shift module; Be used for the said session on the said subscriber equipment is transferred to said objective circuit switching domain by said source packet-switched domain, and when said session is shifted, keep the priority characteristic and the priority-level information of said session packet-switched domain in said source.

Second receiver module is used for the priority-level information of the session packet-switched domain in the source on the subscriber equipment that receiving internet protocol multi-media sub-system network entity sends;

Second sending module; Be used for after said second receiver module receives said priority-level information; Base station sub-system to said objective circuit switching domain is sent resource allocation request message; And in said resource allocation request message, carry said priority-level information, so that said base station sub-system is preferably said resource allocation request message Resources allocation, the said session on the said subscriber equipment is transferred to said objective circuit switching domain by said source packet-switched domain.

The embodiment of the invention also provides a kind of proxy call conversation control function entity equipment, comprising:

The 3rd receiver module is used to receive the session transfer request message that subscriber equipment sends, and said session transfer request message is carried the session of said subscriber equipment and shifted sign and priority session indication information;

The 3rd determination module, the session that is used for receiving according to said the 3rd receiver module shift sign and confirm that said session transfer request message is the session transfer request message of circuit commutative field to packet-switched domain;

The 3rd sending module; Be used for confirming that at said the 3rd determination module said session transfer request message is that circuit commutative field is after the session transfer request message of packet-switched domain; Said session transfer request message is sent to the internet protocol multimedia subsystem network entity; So that the session on the said subscriber equipment is transferred to said packet-switched domain by said circuit commutative field, said session transfer request message carries said priority session indication information and sign is shifted in session.

Pass through the embodiment of the invention; Mobile Switching Center Server can be known the priority-level information of the session packet-switched domain in the source on the subscriber equipment; And the session on this subscriber equipment is being transferred to by the source packet-switched domain in the process of objective circuit switching domain, can kept the priority characteristic of above-mentioned session packet-switched domain in the source; In addition; Proxy call conversation control function entity can know that also session on the subscriber equipment is in the priority-level information of circuit commutative field; Session on the subscriber equipment is being transferred to by circuit commutative field in the process of packet-switched domain, also can kept session on the above-mentioned subscriber equipment in the priority characteristic of circuit commutative field.When thereby the called subscriber equipment that can realize having the priority session shifts, guarantee that the priority of session on this called subscriber equipment is constant between packet-switched domain and circuit commutative field.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the flow chart of the method embodiment one that shifts between priority session Access Network of the present invention;

Fig. 2 is the flow chart of the method embodiment two that shifts between priority session Access Network of the present invention;

Fig. 3 is the flow chart of the method embodiment three that shifts between priority session Access Network of the present invention;

Fig. 4 is the flow chart of the method embodiment four that shifts between priority session Access Network of the present invention;

Fig. 5 is the flow chart of the method embodiment five that shifts between priority session Access Network of the present invention;

Fig. 6 is the flow chart of the method embodiment six that shifts between priority session Access Network of the present invention;

Fig. 7 is the flow chart of the method embodiment seven that shifts between priority session Access Network of the present invention;

Fig. 8 is the structural representation of subscriber equipment embodiment one of the present invention;

Fig. 9 is the structural representation of subscriber equipment embodiment two of the present invention;

Figure 10 is the structural representation of Mobile Switching Center Server embodiment one of the present invention;

Figure 11 is the structural representation of Mobile Switching Center Server embodiment two of the present invention;

Figure 12 is the structural representation of Mobile Switching Center Server embodiment three of the present invention;

Figure 13 is the structural representation of Mobile Switching Center Server embodiment four of the present invention;

Figure 14 is the structural representation of proxy call conversation control function entity apparatus embodiments one of the present invention;

Figure 15 is the structural representation of proxy call conversation control function entity apparatus embodiments two of the present invention.

Embodiment

For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the present invention protects.

Fig. 1 is the flow chart of the method embodiment one that shifts between priority session Access Network of the present invention, and as shown in Figure 1, the method that shifts between this priority session Access Network can comprise:

Step 101, subscriber equipment is shifted to the objective circuit switching domain by the source packet-switched domain, and packet-switched domain has the priority characteristic in the source to confirm session on this subscriber equipment.

Particularly, when subscriber equipment has moved out the coverage of packet-switched domain, when getting into the coverage of circuit commutative field, subscriber equipment need be by being shifted to the objective circuit switching domain by the source packet-switched domain.

Wherein, the priority characteristic refers to that packet-switched domain is the priority session in the source for session on this subscriber equipment.

Step 102; Subscriber equipment sends the connection management business request information to the Mobile Switching Center Server of objective circuit switching domain; This connection management business request information is carried the priority-level information of the session packet-switched domain in the source on the subscriber equipment; So that Mobile Switching Center Server is known the priority-level information of the session packet-switched domain in the source on the subscriber equipment, when being transferred to the objective circuit switching domain by the source packet-switched domain, the session on the subscriber equipment can keep the priority characteristic and the priority-level information of above-mentioned session packet-switched domain in the source.

In the present embodiment, above-mentioned connection management business request information can also be carried the transfer indication information of source packet-switched domain to the objective circuit switching domain.

Further; Subscriber equipment is before the Mobile Switching Center Server of objective circuit switching domain sends the connection management business request information; When this subscriber equipment is that this subscriber equipment can also convert the session on this subscriber equipment into eMLPP corresponding priorities rank in the priority-level of packet-switched domain when supporting the subscriber equipment of eMLPP.

Further; Subscriber equipment is after the Mobile Switching Center Server of objective circuit switching domain sends the connection management business request information; This subscriber equipment can also receive the acceptance response message to above-mentioned connection management business request information that Mobile Switching Center Server sends; This acceptance response message is that the priority-level information that Mobile Switching Center Server will obtain from the connection management business request information is carried out authentication to internet protocol multimedia subsystem; After this priority-level authentification of message passes through, send to subscriber equipment.

In the present embodiment; Subscriber equipment is after the Mobile Switching Center Server of objective circuit switching domain sends the connection management business request information; Mobile Switching Center Server can also be the priority-level information that meets the transmission of conversation initialized protocol signaling with the priority-level information translation; And the session transfer request message of the priority-level information after conversion is carried in the transmission of internet protocol multimedia subsystem network entity, so that the session on the subscriber equipment is transferred to the objective circuit switching domain according to priority mode by the source packet-switched domain.

In the present embodiment; Subscriber equipment by the source packet-switched domain when the objective circuit switching domain shifts; Confirm that session on this subscriber equipment is after the source packet-switched domain has the priority characteristic; This subscriber equipment sends to the priority-level information of the packet-switched domain in the source of the session on this subscriber equipment the Mobile Switching Center Server of objective circuit switching domain; Thereby can realize that Mobile Switching Center Server knows the priority-level information of the session packet-switched domain in the source on the subscriber equipment; Session on the subscriber equipment is transferred to the objective circuit switching domain by the source packet-switched domain, and keep the priority characteristic and the priority-level information of above-mentioned session packet-switched domain in the source.

Fig. 2 is the flow chart of the method embodiment two that shifts between priority session Access Network of the present invention, and as shown in Figure 2, the method that shifts between this priority session Access Network can comprise:

Step 201; The Mobile Switching Center Server of objective circuit switching domain receives the connection management business request information that subscriber equipment sends; This connection management business request information be subscriber equipment by the source packet-switched domain when the objective circuit switching domain shifts; Confirm that session on this subscriber equipment is sent after the source packet-switched domain has the priority characteristic, this connection management business request information is carried the priority-level information of the session packet-switched domain in the source on the subscriber equipment.

Step 202, Mobile Switching Center Server is transferred to the objective circuit switching domain with the above-mentioned session on the subscriber equipment by the source packet-switched domain, and when session is shifted, keeps the priority characteristic and the priority-level information of above-mentioned session packet-switched domain in the source.

Further; In a kind of implementation of present embodiment; After the step 201, Mobile Switching Center Server can also send the acceptance response message to above-mentioned connection management business request information to subscriber equipment, and this acceptance response message is that the priority-level information that Mobile Switching Center Server will obtain from the connection management business request information is carried out authentication to IMS; After above-mentioned priority-level authentification of message passes through, send to this subscriber equipment.

Further, in the another kind of implementation of present embodiment, after the step 201, Mobile Switching Center Server can also be with above-mentioned priority-level information translation for meeting conversation initialized protocol (Session Initiation Protocol; Hereinafter to be referred as: SIP) the priority-level information of signaling transmission; And the session transfer request message of the priority-level information after conversion is carried in the transmission of IMS network entity, so that the above-mentioned session on this subscriber equipment is transferred to the objective circuit switching domain according to priority mode by the source packet-switched domain.

The foregoing description can realize that Mobile Switching Center Server knows the priority-level information of the session packet-switched domain in the source on the subscriber equipment, and can be implemented in priority characteristic and the priority-level information that keeps above-mentioned session packet-switched domain in the source when session on the subscriber equipment transferred to the objective circuit switching domain by the source packet-switched domain.

Fig. 3 is the flow chart of the method embodiment three that shifts between priority session Access Network of the present invention; A kind of concrete implementation as the present invention embodiment illustrated in figures 1 and 2; Present embodiment has provided the bimodulus UE with priority session is transferred to the CS territory by the PS territory as called UE process; Wherein this called UE has the eMLPP business in the CS territory, or signatory any business but the UE of UE for supporting that eMLPP is professional about the priority session of UE.

As shown in Figure 3, the method that shifts between this priority session Access Network can comprise:

Step 301, UE at RACH to base station sub-system (Base Station Subsystem; Hereinafter to be referred as: BSS) the request allocated channel is to set up Radio Resource (Radio Resource; Hereinafter to be referred as: RR) layer connects.

Particularly, UE can be to BSS channel request (Channel Request) message, to ask allocated channel to BSS.

Step 302, BSS is that UE distributes dedicated channel and returns the response message to this channel request message.

Particularly, the response message that returns to UE of BSS can be for distributing (Immediate Assignment) message immediately.

Step 303, UE receives after the response message that BSS returns, and UE stops the channel request message to BSS.

Step 304, UE confirms that the performed action of this UE is the transfer to the CS territory of PS territory, and the session on this UE is the priority session.

Step 305, UE sends CM Service Request message to the MSC server.In the present embodiment, the cell that comprises in the CM Service Request message can be as shown in table 1.

Table 1

When the session on the UE is the priority session in former PS territory; Then UE can carry session on this UE in the priority-level information in PS territory in this CM Service Request message; In this CMService Request message, carry simultaneously the transfer indication information of PS territory to the CS territory, this PS territory is the request message that sends to the transfer in CS territory for the PS territory to this CM Service Request message of transfer indication information indication in CS territory.Because the UE of the UE in the present embodiment for supporting that eMLPP is professional; Therefore before sending CM Service Request message; UE can be the professional corresponding priorities rank of eMLPP with the priority-level information setting of the session on this UE in the PS territory, and is carried in the CM Service Request message.

Particularly; Session on this UE can be through priority (priority) expression of CM Service Request message in the priority-level information in PS territory; The PS territory can be through increasing an optional type of service position " call establishment for PS to CS transfer " at CM type of service (CM service type) item to the transfer indication information in CS territory, and using this CM Service Request message of this bit representation is the conversation request message of sending to the transfer in CS territory as the PS territory.Like this; UE just can not verify the priority-level information in this CMService Request message; After the MSC server receives this CMService Request message; Judge that according to this transfer indication information this CM Service Request message is that request message or session transfer request message are set up in session, if confirm that this CM Service Request message is session transfer request message, then the MSC server do not check this UE at the eMLPP in CS territory CAMEL-Subscription-Information.

In addition; In order to prevent that UE is provided with wrong priority-level, the MSC server can be to the priority-level information that from CM Service Request message, obtains to network side service set and continuous server (Service Centralization and Continuity Application Server; Hereinafter to be referred as: SCCAS) carry out authentication, use correct priority-level to guarantee UE.Particularly, the authentication to above-mentioned precedence information can specifically can comprise through notice (INFO) the message realization of SIP:

Step 305a; The MSC server sends authentication request message to SCC AS; This authentication request message can be the SIP INFO; The purpose of this SIP INFO (subject) header field is priority authentication (priority authentication), and the purpose of representing this SIP INFO is that priority-level information is carried out authentication; The priority header field of this SIP INFO carries the priority-level information that from CM Service Request message, obtains.The From header field of this SIP INFO is the identify label of UE, for example: the telephone number of this UE or international mobile subscriber identity (International Mobile Subscriber Identification Number; Hereinafter to be referred as: IMSI), this SIP INFO sends message for band is outer, promptly newly sets up the channel between MSC server and the SCC AS.Identify label according to UE; SCC AS can find UE to go up the priority-level information of specified session (being nearest state of activation session here); And compare with priority-level information in the SIP INFO, judge whether the priority-level information that UE is provided with is correct.

Step 305b, the MSC server receives the authentication response message that SCC AS returns, and this authentication response message also can be SIP INFO, (the Authentication Information of the authentication information in this authentication response message; Hereinafter to be referred as: Authentication-Info): accept (accept)/refusal (reject) the expression authentication result; Priority head in this authentication response message carries the priority-level information of carrying in the SIPINFO message of MSC server transmission, and expression SCC AS accepts this priority-level.

If the authentication information in the authentication response message that SCC AS returns is for accepting; Then the MSC server continues execution in step 306 and subsequent step; If the authentication information in the authentication response message that SCC AS returns is refusal; Then the MSC server returns refuse information to UE, and for example: connection management service denial message (Connect Management service reject) also finishes this flow process.

Step 306, the MSC server returns the acceptance response message of CM Service Request message to UE, for example: professional (the Connect Management Service Accept that accepts of connection management; Hereinafter to be referred as: message CM Service Accept).

Step 307, UE sends session to the MSC server and sets up request (setup) message after receiving CM Service Accept message, and the called number of this setup message is session forwarding number (the Session Transfer Number of UE; Hereinafter to be referred as: STN).

Step 308, MSC server are received after the setup message, send to call out to UE and carry out (call proceeding) message, to return the progress that session is set up to UE.

Step 309; The MSC server sends resource allocation request (assignment request) message to BSS; With request BSS Resources allocation; And in this resource allocation request message, carry the priority-level information that from CM Service Request message, obtains, so that this resource allocation request message of BSS priority treatment.

Step 310, BSS carries out channel allocation and returns resource allocation order (assignment command) message to UE.

Step 311, UE receives after the resource allocation command messages, activates channel, and sets up the channel connection, after the channel successful connection was set up, UE returned resource allocation to BSS and accomplishes (assignment complete) message.

Step 312 receives that the resource allocation of UE transmission is accomplished after the message, and BSS discharges the resource of distributing before, and accomplishes message to MSC server transmission resource allocation.

Step 313 is because the MSC server in the present embodiment is IMS centralized traffic (IMS Centralized Services; Hereinafter to be referred as: the MSC server that ICS) strengthens; Then the MSC server can generate SIP according to the setup message received and invites (SIP invite) message to send to SCC AS, and is that the priority-level information of priority session is carried in this SIP invite message with the priority-level information translation of receiving; Particularly, can in resource priority (Resource-Priority) header field of this SIP invite message, carry the priority-level information of above-mentioned priority session.

Step 314, SCC AS receives after this SIP invite message, carries out the opposite end renewal process.

Step 315, session is transferred to the CS territory by the PS territory, and the SCC AS access tributary that the PS territory is original discharges.

In the present embodiment; If the user has different priority levels signatory the contracting in the priority in CS territory with the user of the priority in PS territory; Then the present invention embodiment shown in Figure 3 can also be applicable to that the calling UE that has the priority session transfers to the process in CS territory by the PS territory, and wherein this calling UE eMLPP that contracted in the CS territory is professional.

Present embodiment can be realized the priority-level information that the MSC server is known the session PS territory in the source on the UE from UE, the session on the UE is transferred to the target CS territory by PS territory, source, and keep the priority characteristic and the priority-level information in above-mentioned session PS territory in the source.

Fig. 4 is the flow chart of the method embodiment four that shifts between priority session Access Network of the present invention, and as shown in Figure 4, the method that shifts between this priority session Access Network can comprise:

Step 401, the priority-level information of the session packet-switched domain on the subscriber equipment that the Mobile Switching Center Server receiving internet protocol multi-media sub-system network entity of objective circuit switching domain sends in the source.

Further; In the present embodiment; Session on the subscriber equipment that the Mobile Switching Center Server receiving internet protocol multi-media sub-system network entity of objective circuit switching domain sends is before the priority-level information of source packet-switched domain; This Mobile Switching Center Server can also receive the session that subscriber equipment sends the source packet-switched domain has the priority characteristic after in the session of confirming on this subscriber equipment and set up request message, and the session forwarding number that request message carries priority session indication information and this subscriber equipment is set up in this session; Then; Mobile Switching Center Server can confirm that this session sets up request message and be the session transfer request message of source packet-switched domain to the objective circuit switching domain according to this session forwarding number; And confirm to shift above-mentioned session according to priority mode according to priority session indication information; Next Mobile Switching Center Server can be set up the media bearer of core-network side; Send internet protocol multimedia subsystem domain session transfer request message to the internet protocol multimedia subsystem network entity, this internet protocol multimedia subsystem domain session transfer request message is carried above-mentioned priority session indication information.

Particularly; The priority-level information of the session packet-switched domain on the subscriber equipment that the Mobile Switching Center Server receiving internet protocol multi-media sub-system network entity of objective circuit switching domain sends in the source can for: the response message to above-mentioned internet protocol multimedia subsystem domain session transfer request message that Mobile Switching Center Server receiving internet protocol multi-media sub-system network entity sends, this response message carries the priority-level information of the session packet-switched domain in the source on the subscriber equipment.

Step 402; Mobile Switching Center Server sends resource allocation request message to the base station sub-system of objective circuit switching domain; And in resource allocation request message, carry above-mentioned priority-level information; So that base station sub-system is preferably this resource allocation request message Resources allocation, the session on the subscriber equipment is transferred to the objective circuit switching domain by the source packet-switched domain.

In the present embodiment; The priority-level information of the session packet-switched domain on the subscriber equipment that the Mobile Switching Center Server of objective circuit switching domain can receiving internet protocol multi-media sub-system network entity sends in the source; Mobile Switching Center Server can send resource allocation request message to the base station sub-system of objective circuit switching domain then; And in resource allocation request message, carry above-mentioned priority-level information; So that base station sub-system is preferably this resource allocation request message Resources allocation; Session on the subscriber equipment is transferred to the objective circuit switching domain by the source packet-switched domain; Thereby the Mobile Switching Center Server that can realize the objective circuit switching domain is known the priority-level information of the session packet-switched domain in the source on the subscriber equipment, and the session on the subscriber equipment is transferred to the objective circuit switching domain by the source packet-switched domain, and keeps the priority characteristic and the priority-level information of above-mentioned session packet-switched domain in the source.

Fig. 5 is the flow chart of the method embodiment five that shifts between priority session Access Network of the present invention; As the present invention's a kind of concrete implementation embodiment illustrated in fig. 4; Present embodiment has provided the bimodulus UE that includes the priority session and has transferred to the process in CS territory as called UE by the PS territory, and wherein this called UE has the priority signing service in the CS territory; Perhaps, the not signatory any business of this called UE about the priority session, but this called UE is for supporting the UE of priority service.

As shown in Figure 5, the method that shifts between this priority session Access Network can comprise:

Step 501, UE connects to set up the RR layer to BSS request allocated channel at RACH.

Particularly, UE can be to the BSS channel request message, to ask allocated channel to BSS.

Step 502, BSS is that UE distributes dedicated channel and returns the response message to channel request message.

Step 503, UE receives after the response message that BSS returns, and stops the channel request message to BSS, sends CM Service Request message to core net MSC server, sets up the CS territory with request and connects.

Step 504, the MSC server returns the acceptance response message of CM Service Request message to UE, for example: CM Service Accept message (CM Service Accept).

Step 505; UE judges whether the session on this UE is the priority session in the PS territory; If; Then the session on this UE also needs session according to priority to handle in the CS territory, and then UE need set up in request (setup) message in session to be sent and carry priority session indication information, for example: before called number STN, add special prefix (for example: " 272 ") and represent that this session is the priority session.

If UE confirms that the session on this UE is not the priority session in the PS territory, then this UE will handle by the flow process of general session, repeat no more at this.

Step 506, UE sends setup message to the MSC server, carries priority session indication information in this setup message, for example: before called number STN, add special prefix (for example: " 272 ") and represent that this session is the priority session.

Step 507; The MSC server is received after the setup message; Judging these session foundation request needs according to the prefix of STN handles according to priority mode; And judge this session request of setting up according to the STN value and be the transfer request of PS territory to the CS territory, but not common session sets up and asks, then the MSC server is not investigated the priority CAMEL-Subscription-Information of user in the CS territory.

Step 508, the MSC server is set up the core-network side media bearer, sends session transfer request (invite) message to IMS territory entity SCC AS, and this invite message carries priority session indication information.

Step 509, MSC server are returned to call out to UE and are carried out (call proceeding) message, to return the progress that session is set up to UE.

In the present embodiment, step 508 and step 509 can executed in parallel, also can successively carry out, and present embodiment does not limit this.

Step 510, SCC AS carries out the opposite end renewal process according to invite message.

Particularly; In the present embodiment; SCC AS can preserve session on the UE in the priority-level information in PS territory; Then SCC AS carries this priority-level information in the request message of the renewal opposite end of sending, and upgrades the session that also can comprise in the response message of opposite end on the UE priority-level information in the PS territory accordingly.In addition; SCC AS also can not preserve session on the UE in the priority-level information in PS territory; The professional server of processing priority has been preserved session on the above-mentioned UE in the priority-level information in PS territory at session establishment phase; Therefore in the renewal process of opposite end; The professional server of this processing priority adds session on the UE in the priority-level information in PS territory in the request message that upgrades the opposite end, upgrade the session that also comprises in the response message of opposite end on this UE priority-level information in the PS territory accordingly.Particularly, this priority-level information can be carried at the SIP header field, for example in the Resource-Priority header field.

Step 511 receives after the response message that returns the opposite end, and SCC AS returns the response message to invite message to the MSC server, carries session on the UE in this response message in the priority-level information in PS territory.This response message can be Temporary Response message or the 2** success response message of 1**.

Step 512; The MSC server receives after the response message to invite message; Send resource allocation request (assignment request) message to BSS; And in this resource allocation request message, carry the priority-level information of receiving from SCC AS, so that this resource allocation request message of BSS priority treatment.

Step 513, BSS carries out channel allocation and returns resource allocation order (assignment command) message to UE.

Step 514, UE receives after the resource allocation command messages, activates channel, and sets up the channel connection, after the channel successful connection was set up, UE returned resource allocation to BSS and accomplishes (assignment complete) message.

Step 515 receives that the resource allocation of UE transmission is accomplished after the message, and BSS discharges the resource of distributing before, and accomplishes message to MSC server transmission resource allocation.

Step 516, MSC server are received after the resource allocation completion message, are sent the affirmation (Acknowledgement to the response message of transfer request to IMS territory entity SCCAS; Hereinafter to be referred as: ACK) message.

Step 517 after SCC AS receives acknowledge message, is returned ACK message to the opposite end, and session is transferred to the CS territory by the PS territory, and SCC AS discharges former PS territory access tributary then.

In the present embodiment; If the user has different priority levels signatory the contracting in the priority in CS territory with the user of the priority in PS territory; Then the present invention's calling UE of having the priority session of can also being applicable to embodiment illustrated in fig. 5 is transferred to the process in CS territory by the PS territory, wherein this calling UE priority service of having contracted in the CS territory.

The MSC server that present embodiment can be realized the target CS territory from the IMS territory network entity know the priority-level information in the session PS territory on the UE in the source; Session on the UE is transferred to the target CS territory by PS territory, source, and keep the priority characteristic and the priority-level information in above-mentioned session PS territory in the source.

Fig. 6 is the flow chart of the method embodiment six that shifts between priority session Access Network of the present invention, and as shown in Figure 6, the method that shifts between this priority session Access Network can comprise:

Step 601, proxy call conversation control function entity receives the session transfer request message that subscriber equipment sends, and this session transfer request message is carried the session of subscriber equipment and is shifted sign and priority session indication information.

Step 602; Proxy call conversation control function entity shifts sign according to session and confirms that above-mentioned session transfer request message is that circuit commutative field is after the session transfer request message of packet-switched domain; The session transfer request message is sent to the internet protocol multimedia subsystem network entity; So that the session on the subscriber equipment is transferred to packet-switched domain by circuit commutative field, this session transfer request message carries above-mentioned priority session indication information and sign is shifted in session.

Further; The session transfer request message is sent to after the internet protocol multimedia subsystem network entity; The response message to above-mentioned session transfer request message that this proxy call conversation control function entity can also receiving internet protocol multi-media sub-system network entity sends, this response message carry session on the subscriber equipment in the priority-level information of circuit commutative field.

Further; What proxy call conversation control function entity receiving internet protocol multi-media sub-system network entity sent is directed against after the response message of session transfer request message; This proxy call conversation control function entity can also send to strategy and charging regulation function entity in the priority-level information of circuit commutative field with the session on the subscriber equipment, so that strategy judges according to this priority-level information whether the internet protocol multimedia subsystem signaling bear that transmits above-mentioned session meets the requirement of the priority-level of this session with charging regulation function entity; If do not meet, then proxy call conversation control function entity is initiated the bearing modification process.

Next, proxy call conversation control function entity can be set up the media bearer of the requirement of the priority-level that meets this session for above-mentioned session.

In the present embodiment; Proxy call conversation control function entity can know that session on the subscriber equipment is in the priority-level information of circuit commutative field; Session on the subscriber equipment is being transferred to by circuit commutative field in the process of packet-switched domain, can kept session on the above-mentioned subscriber equipment in the priority characteristic of circuit commutative field.When thereby the called subscriber equipment that can realize having the priority session shifts, guarantee that the priority of session on this called subscriber equipment is constant between packet-switched domain and circuit commutative field.

Fig. 7 is the flow chart of the method embodiment seven that shifts between priority session Access Network of the present invention; As the present invention's a kind of concrete implementation embodiment illustrated in fig. 6, present embodiment has provided the UE that includes the priority session is transferred to the PS territory by the CS territory as called UE detailed process.In the present embodiment, the priority session of setting up in the CS territory exists UE not know that this session is the priority session, perhaps UE known on it session be the priority session but do not know the situation of the precedence information of this priority session.

As shown in Figure 7, the method that shifts between this priority session Access Network can comprise:

Step 701, UE prepares to initiate the CS territory to PS territory session transfer request (invite) message, and before the initiation session transfer request message, UE can judge earlier whether the session on this UE is the priority session in former CS territory; If this UE confirms that the session on this UE is the priority session in former CS territory; And the priority-level of the session on known this UE of this UE, then this UE can carry the priority-level information of priority session indication information and this session in invite message to be sent; If this UE confirms that the session on this UE is the priority session in former CS territory, but this UE does not know the priority-level of the session on this UE, then this UE only carries priority session indication information in invite message to be sent; If it is not that the session that priority session or this UE are not sure of on this UE is the priority session in former CS territory that this UE confirms the session on this UE, then this UE can not carry priority session indication information or priority-level information in invite message to be sent.

Particularly; Priority session indication information and/or priority-level information can be passed through priority (priority) header field or the Resource-Priority header field in invite message, or at request generic resource identifier (request-Uniform Resource Identifier; Hereinafter to be referred as: request-URI) increase prefix in the header field and represent.

In the present embodiment, the request-URI that asks in this invite message shifts sign (Session Transfer Identifier for the session of this UE; Hereinafter to be referred as: STI).

Step 702, UE is to IMS territory entity Proxy Call Session Control Function (Proxy Call Session Control Function; Hereinafter to be referred as: P-CSCF) entity sends invite message.

Step 703, it is the session transfer request message of CS to PS that the P-CSCF entity is judged this invite message according to the STI in this invite message, but not request message is set up in common session, then the P-CSCF entity is not investigated user's priority CAMEL-Subscription-Information.

In the present embodiment; If UE carries priority indication information and priority-level information in the invite message that step 701 is sent; Then in the step 703, the P-CSCF entity can also judge whether the current default and transmission IMS signaling bear of UE meets the requirement of the priority-level of the session on this UE according to this priority-level information, if do not meet; Then initiate the bearing modification process, and then execution in step 704 and subsequent step thereof; If meet, then direct execution in step 704 and subsequent step thereof.

Step 704, the P-CSCF entity sends to SCC AS with invite message.

Step 705, SCC AS carries out the opposite end renewal process according to this invite message.

Step 706, according to the response message that the opposite end is returned, SCC AS returns the response message to invite message to the P-CSCF entity.

In the present embodiment; SCC AS can preserve session on the UE in the priority-level information in PS territory; Then SCC AS carries this priority-level information when upgrading the opposite end request, upgrades the session that also can comprise in the response message of opposite end on the UE priority-level information in the PS territory accordingly.In addition; SCC AS also can not preserve session on the UE in the priority-level information in PS territory; The professional server of processing priority has been preserved session on the above-mentioned UE in the priority-level information in PS territory at session establishment phase; Therefore in the renewal process of opposite end; The professional server of this processing priority adds session on the UE in the priority-level information in PS territory in upgrading the opposite end request message, upgrade the session that also comprises in the response message of opposite end on this UE priority-level information in the PS territory accordingly.Particularly, this priority-level information can be carried at the SIP header field, for example: in the Resource-Priority header field.

Step 707, P-CSCF entity receive after the response message to invite message, and the priority-level information of the session on the UE in the PS territory is sent to strategy and charging rule functions (Policy and Charging Rules Function; Hereinafter to be referred as: PCRF) entity, come the implementation strategy and control (the Policy and Charging Control that charges by the PCRF entity; Hereinafter to be referred as: PCC) process.

Step 708, it is the priority session that the PCRF entity is judged this session according to priority-level information, then service quality (the Quality of Service of the IMS signaling bear of this session is transmitted in inspection; Hereinafter to be referred as: the QoS) priority allocation of parameter and retention parameter (Allocation and Retention Priority; Hereinafter to be referred as: ARP) whether value meets the requirement of the priority-level of this session, if do not meet then revise the ARP value of IMS signaling bear, execution in step 709 and subsequent step thereof again; If meet, then direct execution in step 709 and subsequent step thereof.

Step 709, the media information that the PCRF entity returns according to the opposite end is set up the media bearer that meets the session priority grade requirement, execution in step 710 and subsequent step thereof then for this session.

Step 710, the P-CSCF entity will return to UE to the response message of invite message.

Step 711, UE returns to the affirmation of the response message of invite message (ACK) message.

Step 712 after SCC AS receives this acknowledge message, is accomplished the foundation and the opposite end renewal process of PS territory access tributary, and the access tributary in former CS territory is discharged.

In the present embodiment; If the user has different priority levels signatory the contracting in the priority in CS territory with the user of the priority in PS territory; Then the present invention's calling UE of having the priority session of also being applicable to embodiment illustrated in fig. 7 is transferred to the process in PS territory by the CS territory, wherein this calling UE priority service of having contracted in the PS territory.

Present embodiment can realize that the called UE with priority session transfers to target P S territory by CS territory, source, guarantees that the priority in CS territory in the source of session on this called UE is constant.

One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.

Fig. 8 is the structural representation of subscriber equipment embodiment one of the present invention, and the subscriber equipment in the present embodiment can be realized the flow process that the present invention is embodiment illustrated in fig. 1, and is as shown in Figure 8, and this subscriber equipment can comprise:

First determination module 81, be used for subscriber equipment by the source packet-switched domain when the objective circuit switching domain shifts, packet-switched domain has the priority characteristic in the source to confirm session on this subscriber equipment;

First sending module 82; Be used for confirming that at first determination module 81 session on these subscriber equipmenies is after the source packet-switched domain has the priority characteristic; Mobile Switching Center Server to the objective circuit switching domain sends the connection management business request information; This connection management business request information is carried the priority-level information of the session packet-switched domain in the source on the subscriber equipment; So that Mobile Switching Center Server is known the priority-level information of the session packet-switched domain in the source on the subscriber equipment; Session on this subscriber equipment is transferred to the objective circuit switching domain by the source packet-switched domain, and keep the priority characteristic and the priority-level information of above-mentioned session packet-switched domain in the source.

In the above-mentioned subscriber equipment; First determination module 81 subscriber equipment by the source packet-switched domain when the objective circuit switching domain shifts; Confirm that session on this subscriber equipment is after the source packet-switched domain has the priority characteristic; First sending module 82 sends to the priority-level information of the packet-switched domain in the source of the session on this subscriber equipment the Mobile Switching Center Server of objective circuit switching domain; Thereby can realize that Mobile Switching Center Server knows the priority-level information of the session packet-switched domain in the source on the subscriber equipment; Session on the subscriber equipment is transferred to the objective circuit switching domain by the source packet-switched domain, and keep the priority characteristic and the priority-level information of above-mentioned session packet-switched domain in the source.

Fig. 9 compares with subscriber equipment shown in Figure 8 for the structural representation of subscriber equipment embodiment two of the present invention, and difference is that subscriber equipment shown in Figure 9 can also comprise:

Modular converter 83; Be used at first sending module 82 before the Mobile Switching Center Server of objective circuit switching domain sends the connection management business request information; When this subscriber equipment is when supporting the subscriber equipment of eMLPP, to convert the session on this subscriber equipment into eMLPP corresponding priorities rank in the priority-level of packet-switched domain;

First receiver module 84; Be used to receive the acceptance response message that Mobile Switching Center Server sends to the connection management business request information; This acceptance response message is that the priority-level information that Mobile Switching Center Server will obtain from the connection management business request information is carried out authentication to internet protocol multimedia subsystem; After this priority-level authentification of message passes through, send to subscriber equipment.

Above-mentioned subscriber equipment can realize that Mobile Switching Center Server knows the priority-level information of the session packet-switched domain in the source on the subscriber equipment; Session on the subscriber equipment is transferred to the objective circuit switching domain by the source packet-switched domain, and keep the priority characteristic and the priority-level information of above-mentioned session packet-switched domain in the source.

Figure 10 is the structural representation of Mobile Switching Center Server embodiment one of the present invention, and the Mobile Switching Center Server in the present embodiment can be realized the flow process that the present invention is embodiment illustrated in fig. 2, and is shown in figure 10, and this Mobile Switching Center Server can comprise:

The 4th receiver module 1001; Be used to receive the connection management business request information that subscriber equipment sends; This connection management business request information be subscriber equipment by the source packet-switched domain when the objective circuit switching domain shifts; Confirm that session on the subscriber equipment is sent after the source packet-switched domain has the priority characteristic, this connection management business request information is carried the priority-level information of the above-mentioned session packet-switched domain in the source on the subscriber equipment;

Session shift module 1002 is used for the above-mentioned session on the subscriber equipment is transferred to the objective circuit switching domain by the source packet-switched domain, and when session is shifted, keeps the priority characteristic and the priority-level information of above-mentioned session packet-switched domain in the source.

Above-mentioned Mobile Switching Center Server can be known the priority-level information of the session packet-switched domain in the source on the subscriber equipment, and can be implemented in priority characteristic and the priority-level information that keeps above-mentioned session packet-switched domain in the source when session on the subscriber equipment transferred to the objective circuit switching domain by the source packet-switched domain.

Figure 11 is the structural representation of Mobile Switching Center Server embodiment two of the present invention; Compare with Mobile Switching Center Server shown in Figure 10; Difference is that in a kind of implementation of present embodiment, Mobile Switching Center Server shown in Figure 11 can also comprise:

Authentication module 1003 is used for the priority-level information that the connection management business request information that receives from the 4th receiver module 1001 obtains is carried out authentication to IMS;

The 4th sending module 1004 is used for after above-mentioned priority-level authentification of message passes through, and sends the acceptance response message to above-mentioned connection management business request information to subscriber equipment.

In a kind of implementation of present embodiment, above-mentioned Mobile Switching Center Server can also comprise:

Priority modular converter 1005, being used for above-mentioned priority-level information translation is the priority-level information that meets the transmission of SIP signaling;

The 5th sending module 1006; The session transfer request message that is used for the priority-level information after carrying conversion of sending to the IMS network entity is so that the above-mentioned session on this subscriber equipment is transferred to the objective circuit switching domain according to priority mode by the source packet-switched domain.

Figure 12 is the structural representation of Mobile Switching Center Server embodiment three of the present invention, and the Mobile Switching Center Server in the present embodiment can be realized the flow process that the present invention is embodiment illustrated in fig. 4.Shown in figure 12, this Mobile Switching Center Server can comprise:

Second receiver module 1201 is used for the priority-level information of the session packet-switched domain in the source on the subscriber equipment that receiving internet protocol multi-media sub-system network entity sends;

Second sending module 1202; Be used for after second receiver module 1201 receives priority-level information; Base station sub-system to the objective circuit switching domain is sent resource allocation request message; And in resource allocation request message, carry priority-level information, so that base station sub-system is preferably this resource allocation request message Resources allocation, the session on the subscriber equipment is transferred to the objective circuit switching domain by the source packet-switched domain.

In the above-mentioned Mobile Switching Center Server; The priority-level information of the session packet-switched domain on the subscriber equipment that second receiver module 1201 can receiving internet protocol multi-media sub-system network entity sends in the source; Second sending module 1202 can send resource allocation request message to the base station sub-system of objective circuit switching domain then; And in resource allocation request message, carry above-mentioned priority-level information; So that base station sub-system is preferably this resource allocation request message Resources allocation; Session on the subscriber equipment is transferred to the objective circuit switching domain by the source packet-switched domain; Thereby the Mobile Switching Center Server that can realize the objective circuit switching domain is known the priority-level information of the session packet-switched domain in the source on the subscriber equipment, and the session on the subscriber equipment is transferred to the objective circuit switching domain by the source packet-switched domain, and keeps the priority characteristic and the priority-level information of above-mentioned session packet-switched domain in the source.

Figure 13 is the structural representation of Mobile Switching Center Server embodiment four of the present invention; Compare with Mobile Switching Center Server shown in Figure 12; Difference is, can also comprise in the Mobile Switching Center Server shown in Figure 13: second determination module 1203 and first is set up module 1204;

In the present embodiment; Second receiver module 1201 can also be before receiving priority-level information; Request message is set up in the session that the reception subscriber equipment sends after the source packet-switched domain has the priority characteristic in the session of confirming on the subscriber equipment, and the session forwarding number that request message carries priority session indication information and above-mentioned subscriber equipment is set up in this session;

Second determination module 1203; Be used for confirming that according to the session forwarding number that second receiver module 1201 receives session sets up request message and be the session transfer request message of source packet-switched domain to the objective circuit switching domain, and the priority session indication information that receives according to second receiver module 1201 is definite shifts above-mentioned session according to priority mode;

First sets up module 1204, is used for after second determination module 1203 confirms to shift above-mentioned session according to priority mode, setting up the media bearer of core-network side;

Further; Second sending module 1202 can also be set up after module 1204 sets up the media bearer of core-network side first; Send internet protocol multimedia subsystem domain session transfer request message to the internet protocol multimedia subsystem network entity, this internet protocol multimedia subsystem domain session transfer request message is carried priority session indication information.

Particularly; The response message to internet protocol multimedia subsystem domain session transfer request message that second receiver module 1201 can receiving internet protocol multi-media sub-system network entity sends, this response message carries the priority-level information of the session packet-switched domain in the source on the subscriber equipment.

Present embodiment can realize that the Mobile Switching Center Server of objective circuit switching domain knows the priority-level information of the session packet-switched domain in the source on the subscriber equipment; Session on the subscriber equipment is transferred to the objective circuit switching domain by the source packet-switched domain, and keep the priority characteristic and the priority-level information of above-mentioned session packet-switched domain in the source.

Figure 14 is the structural representation of proxy call conversation control function entity apparatus embodiments one of the present invention, and the proxy call conversation control function entity equipment in the present embodiment can be realized the flow process that the present invention is embodiment illustrated in fig. 6.Shown in figure 14, this proxy call conversation control function entity equipment can comprise:

The 3rd receiver module 1401 is used to receive the session transfer request message that subscriber equipment sends, and this session transfer request message is carried the session of subscriber equipment and shifted sign and priority session indication information;

The 3rd determination module 1402 is used for shifting sign according to the session that the 3rd receiver module 1401 receives and confirms that session transfer request message is the session transfer request message of circuit commutative field to packet-switched domain;

The 3rd sending module 1403; Be used for confirming that at the 3rd determination module 1402 above-mentioned session transfer request message is that circuit commutative field is after the session transfer request message of packet-switched domain; This session transfer request message is sent to the internet protocol multimedia subsystem network entity; So that the session on the subscriber equipment is transferred to said packet-switched domain by circuit commutative field, this session transfer request message is carried priority session indication information.

Above-mentioned proxy call conversation control function entity equipment can know that session on the subscriber equipment is in the priority-level information of circuit commutative field; Session on the subscriber equipment is being transferred to by circuit commutative field in the process of packet-switched domain, can kept session on the above-mentioned subscriber equipment in the priority characteristic of circuit commutative field.When thereby the called subscriber equipment that can realize having the priority session shifts, guarantee that the priority of session on this called subscriber equipment is constant between packet-switched domain and circuit commutative field.

Figure 15 is the structural representation of proxy call conversation control function entity apparatus embodiments two of the present invention; With proxy call conversation control function entity apparatus in comparison shown in Figure 14; Difference is; In the proxy call conversation control function entity equipment shown in Figure 15; The 3rd receiver module 1401 can also be after the 3rd sending module 1403 sends to the internet protocol multimedia subsystem network entity with the session transfer request message, and the response message to above-mentioned session transfer request message that receiving internet protocol multi-media sub-system network entity sends, this response message carry session on the subscriber equipment in the priority-level information of circuit commutative field.

Further, proxy call conversation control function entity equipment shown in Figure 15 can also comprise: second sets up module 1404;

The 3rd sending module 1403 can also be after the 3rd receiver module 1401 receives above-mentioned response message; Session on the subscriber equipment is sent to strategy and charging regulation function entity in the priority-level information of circuit commutative field, so that strategy judges according to this priority-level information whether the internet protocol multimedia subsystem signaling bear that transmits above-mentioned session meets the requirement of the priority-level of above-mentioned session with charging regulation function entity;

Second sets up module 1404; Be used for the 3rd sending module 1403 with the session on the subscriber equipment after the priority-level information of circuit commutative field sends to strategy and charging regulation function entity, set up the media bearer of the requirement of the priority-level that meets above-mentioned session for above-mentioned session.

When the called subscriber equipment that above-mentioned proxy call conversation control function entity equipment can realize having the priority session shifts, guarantee that the priority of session on this called subscriber equipment is constant between packet-switched domain and circuit commutative field.

It will be appreciated by those skilled in the art that accompanying drawing is the sketch map of a preferred embodiment, module in the accompanying drawing or flow process might not be that embodiment of the present invention is necessary.

It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.

What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.

Claims

1. the method that shifts between a priority session Access Network is characterized in that, comprising:

Said subscriber equipment sends the connection management business request information to the Mobile Switching Center Server of said objective circuit switching domain; Said connection management business request information is carried the priority-level information of the said session packet-switched domain in said source on the said subscriber equipment, so that said Mobile Switching Center Server can keep the priority characteristic and the priority-level information of said session packet-switched domain in said source when the said session on the said subscriber equipment is transferred to said objective circuit switching domain by said source packet-switched domain.

2. method according to claim 1 is characterized in that, said connection management business request information is also carried the transfer indication information of said source packet-switched domain to said objective circuit switching domain.

3. method according to claim 1 and 2 is characterized in that, said subscriber equipment also comprised before the Mobile Switching Center Server of said objective circuit switching domain sends the connection management business request information:

When said subscriber equipment preferential when seizing professional subscriber equipment in advance for what support to strengthen with resource, said subscriber equipment with the session on the said subscriber equipment the priority-level of said packet-switched domain convert into said enhancing preferentially and resource seize professional corresponding priorities rank in advance.

4. method according to claim 3 is characterized in that, said subscriber equipment also comprises after the Mobile Switching Center Server of said objective circuit switching domain sends the connection management business request information:

Said subscriber equipment receives the acceptance response message to said connection management business request information that said Mobile Switching Center Server sends; Said acceptance response message is that the priority-level information that said Mobile Switching Center Server will obtain from said connection management business request information is carried out authentication to internet protocol multimedia subsystem; After said priority-level authentification of message passes through, send to said subscriber equipment.

5. the method that shifts between a priority session Access Network is characterized in that, comprising:

The Mobile Switching Center Server of objective circuit switching domain receives the connection management business request information that subscriber equipment sends; Said connection management business request information is said subscriber equipment by the source packet-switched domain when said objective circuit switching domain shifts; Confirm that session on the said subscriber equipment is sent after said source packet-switched domain has the priority characteristic, said connection management business request information is carried the priority-level information of the said session packet-switched domain in said source on the said subscriber equipment;

6. method according to claim 5 is characterized in that, the Mobile Switching Center Server of said objective circuit switching domain receives after the connection management business request information of subscriber equipment transmission, also comprises:

Said Mobile Switching Center Server sends the acceptance response message to said connection management business request information to said subscriber equipment; Said acceptance response message is that the priority-level information that said Mobile Switching Center Server will obtain from said connection management business request information is carried out authentication to internet protocol multimedia subsystem; After said priority-level authentification of message passes through, send to said subscriber equipment.

7. method according to claim 5 is characterized in that, the Mobile Switching Center Server of said objective circuit switching domain receives after the connection management business request information of subscriber equipment transmission, also comprises:

Said Mobile Switching Center Server is the priority-level information that meets the transmission of conversation initialized protocol signaling with said priority-level information translation; And the session transfer request message of the priority-level information after conversion is carried in the transmission of internet protocol multimedia subsystem network entity, so that the said session on the said subscriber equipment is transferred to said objective circuit switching domain according to priority mode by said source packet-switched domain.

8. the method that shifts between a priority session Access Network is characterized in that, comprising:

9. method according to claim 8; It is characterized in that; Session on the subscriber equipment that the Mobile Switching Center Server receiving internet protocol multi-media sub-system network entity of said objective circuit switching domain sends also comprised before the priority-level information of source packet-switched domain:

Said Mobile Switching Center Server receives the session that said subscriber equipment sends after said source packet-switched domain has the priority characteristic in the session of confirming on the said subscriber equipment and sets up request message, and the session forwarding number that request message carries priority session indication information and said subscriber equipment is set up in said session;

Said Mobile Switching Center Server confirms that according to said session forwarding number it is the session transfer request message of said source packet-switched domain to said objective circuit switching domain that request message is set up in said session; And confirm to shift said session according to priority mode according to said priority session indication information; Said Mobile Switching Center Server is set up the media bearer of core-network side; Send internet protocol multimedia subsystem domain session transfer request message to said internet protocol multimedia subsystem network entity, said internet protocol multimedia subsystem domain session transfer request message is carried said priority session indication information.

10. according to Claim 8 or 9 described methods; It is characterized in that the priority-level information of the session packet-switched domain in the source on the subscriber equipment that the Mobile Switching Center Server receiving internet protocol multi-media sub-system network entity of said objective circuit switching domain sends comprises:

Said Mobile Switching Center Server receives the response message to said internet protocol multimedia subsystem domain session transfer request message that said internet protocol multimedia subsystem network entity sends, and said response message carries the priority-level information of the said session packet-switched domain in said source on the said subscriber equipment.

11. the method that shifts between a priority session Access Network is characterized in that, comprising:

12. method according to claim 11 is characterized in that, said said session transfer request message is sent to after the internet protocol multimedia subsystem network entity, also comprises:

Said proxy call conversation control function entity receives the response message to said session transfer request message that said internet protocol multimedia subsystem network entity sends, and said response message carries session on the said subscriber equipment in the priority-level information of said circuit commutative field.

13. method according to claim 12 is characterized in that, said proxy call conversation control function entity receives being directed against after the response message of said session transfer request message of said internet protocol multimedia subsystem network entity transmission, also comprises:

Said proxy call conversation control function entity sends to strategy and charging regulation function entity with the session on the said subscriber equipment in the priority-level information of said circuit commutative field, so that said strategy and charging regulation function entity judge according to said priority-level information whether the internet protocol multimedia subsystem signaling bear that transmits said session meets the requirement of the priority-level of said session; If do not meet, then said proxy call conversation control function entity is initiated the bearing modification process;

Said proxy call conversation control function entity is the media bearer that the requirement of the priority-level that meets said session is set up in said session.

14. a subscriber equipment is characterized in that, comprising:

First sending module; Be used for confirming that at said first determination module session on the said subscriber equipment is after said source packet-switched domain has the priority characteristic; Mobile Switching Center Server to said objective circuit switching domain sends the connection management business request information; Said connection management business request information is carried the priority-level information of the said session packet-switched domain in said source on the said subscriber equipment; So that said Mobile Switching Center Server is known the priority-level information of the said session packet-switched domain in said source on the said subscriber equipment, when being transferred to said objective circuit switching domain by said source packet-switched domain, the said session on the said subscriber equipment can keep the priority characteristic and the priority-level information of said session packet-switched domain in said source.

15. subscriber equipment according to claim 14 is characterized in that, also comprises:

Modular converter; Be used at said first sending module before the Mobile Switching Center Server of said objective circuit switching domain sends the connection management business request information; When said subscriber equipment preferential when seizing professional subscriber equipment in advance for what support to strengthen with resource, with the session on the said subscriber equipment the priority-level of said packet-switched domain convert into said enhancing preferentially and resource seize professional corresponding priorities rank in advance.

16. subscriber equipment according to claim 15 is characterized in that, also comprises:

First receiver module; Be used to receive the acceptance response message that said Mobile Switching Center Server sends to said connection management business request information; Said acceptance response message is that the priority-level information that said Mobile Switching Center Server will obtain from said connection management business request information is carried out authentication to internet protocol multimedia subsystem; After said priority-level authentification of message passes through, send to said subscriber equipment.

17. a Mobile Switching Center Server is characterized in that, comprising:

18. Mobile Switching Center Server according to claim 17 is characterized in that, also comprises:

Authentication module is used for the priority-level information that the said connection management business request information that receives from said the 4th receiver module obtains is carried out authentication to internet protocol multimedia subsystem;

The 4th sending module is used for after said priority-level authentification of message passes through, and sends the acceptance response message to said connection management business request information to said subscriber equipment.

19. Mobile Switching Center Server according to claim 17 is characterized in that, also comprises:

The priority modular converter, being used for said priority-level information translation is the priority-level information that meets the transmission of conversation initialized protocol signaling;

The 5th sending module; The session transfer request message that is used for the priority-level information after carrying conversion of sending to the internet protocol multimedia subsystem network entity is so that the said session on the said subscriber equipment is transferred to said objective circuit switching domain according to priority mode by said source packet-switched domain.

20. a Mobile Switching Center Server is characterized in that, comprising:

21. Mobile Switching Center Server according to claim 20 is characterized in that, also comprises: second determination module and first is set up module;

Said second receiver module; Also be used for before receiving said priority-level information; Receive the session that said subscriber equipment sends after said source packet-switched domain has the priority characteristic in the session of confirming on the said subscriber equipment and set up request message, the session forwarding number that request message carries priority session indication information and said subscriber equipment is set up in said session;

Said second determination module; Be used for confirming that according to the session forwarding number that said second receiver module receives it is the session transfer request message of said source packet-switched domain to said objective circuit switching domain that request message is set up in said session, and confirm to shift said session according to priority mode according to the priority session indication information that said second receiver module receives;

Said first sets up module, is used for after said second determination module confirms to shift said session according to priority mode, setting up the media bearer of core-network side;

Said second sending module; Also be used for setting up after module sets up the media bearer of core-network side said first; Send internet protocol multimedia subsystem domain session transfer request message to said internet protocol multimedia subsystem network entity, said internet protocol multimedia subsystem domain session transfer request message is carried said priority session indication information.

22. Mobile Switching Center Server according to claim 21; It is characterized in that; Said second receiver module specifically is used to receive the response message to said internet protocol multimedia subsystem domain session transfer request message that said internet protocol multimedia subsystem network entity sends, and said response message carries the priority-level information of the said session packet-switched domain in said source on the said subscriber equipment.

23. a proxy call conversation control function entity equipment is characterized in that, comprising:

24. equipment according to claim 23 is characterized in that,

Said the 3rd receiver module; Also be used for after said the 3rd sending module sends to the internet protocol multimedia subsystem network entity with said session transfer request message; Receive the response message to said session transfer request message that said internet protocol multimedia subsystem network entity sends, said response message carries session on the said subscriber equipment in the priority-level information of said circuit commutative field.

25. equipment according to claim 24 is characterized in that, also comprises: second sets up module;

Said the 3rd sending module; Also be used for after said the 3rd receiver module receives said response message; Session on the said subscriber equipment is sent to strategy and charging regulation function entity in the priority-level information of said circuit commutative field, so that said strategy and charging regulation function entity judge according to said priority-level information whether the internet protocol multimedia subsystem signaling bear that transmits said session meets the requirement of the priority-level of said session;

Said second sets up module; Be used for said the 3rd sending module with the session on the said subscriber equipment after the priority-level information of said circuit commutative field sends to strategy and charging regulation function entity, set up the media bearer of the requirement of the priority-level that meets said session for said session.