CN101277518B

Movatterモバイル変換

Info

Publication number: CN101277518B
Application number: CN2007100888450A
Authority: CN
Inventors: 李振东
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2007-03-26
Filing date: 2007-03-26
Publication date: 2012-02-08
Anticipated expiration: 2027-03-26
Also published as: WO2008116373A1; CN101277518A

Abstract

The present invention provides a processing method of an emergency service, including following steps: (a), an user end initiates an emergency service request to a P-CSCF served the UE; (b), the UE receives the informing information from P-CSCF, the informing information is carried with information of P-CSCF not located in a visit network serving the UE; (c), the UE researches a P-CSCF in the visit network, or the UE is switched to a circuit switch domain. The invention resolves problem that the emergency service is not processed caused by not existing in the same network of the UE and P-CSCF in the prior art by informing UE, P-CSCF not in the network of the UE, UE researching the P-CSCF or switching to the CS domain. The invention has a simple operation, small system improvement.

Description

A kind of processing method of urgency traffic

Technical field

The present invention relates to the mobile communication technology field, particularly the IP Multimedia System of CDMA (code division multiple access) 2000 (IP Multimedia Subsystem, IMS) in, the processing method of user's urgency traffic.

Background technology

(IP Multimedia Subsystem need provide the support to urgency traffic in IMS) to IP Multimedia System.In 3GPP (third generation partner program) and 3GPP2 (third generation partner program 2), all specify at present in the standard of launching this respect.Fig. 1 has provided the Organization Chart of urgent call among the 3GPP2, wherein all omits with the little network element of content relation of the present invention.

That precondition of the present invention is that user terminal (UE, User Equipment) uses is simple IP (Simple IP).

The couplet because business such as urgent call and location are closely related; And these business must be provided by local network (being the network that the user inserts); And P-CSCF (Proxy Call Session Control Function) can search with P-CSCF and provide professional at the E-CSCF of same network (emergency call session controlled function) in urgency traffic.Therefore in the figure, there is a basic prerequisite in system, is exactly that P-CSCF must be at visited network as user during in roaming, and P-CSCF just can find the E-CSCF of visited network that the emergent session business is provided like this, otherwise the support of urgency traffic can't be provided.

Yet, in the IMS of 3GPP2 network, support a kind of like this scene, as shown in Figure 2, when the user in when roaming, give its distributing IP address, the gateway PDSN (packet data serving node) that sets up bearer path is at visited network, but P-CSCF is at home network.Under this scene, can't not find the E-CSCF of visited network at the P-CSCF of visited network, destroyed the primary condition of urgency traffic.At this moment, the user can not use urgency traffic.

Summary of the invention

The problem that the present invention will solve provide a kind of when the user in when roaming, P-CSCF is at the visited network that the user roamed, and under the scene of home network, the method for process user urgency traffic.

In order to address the above problem, the present invention proposes a kind of processing method of urgency traffic, comprises following steps:

(a) user terminal UE initiates emergent operation request to the Proxy Call Session Control Function P-CSCF of this UE of service;

(b) said UE receives the notification message from P-CSCF, carries the P-CSCF information in the residing visited network of UE not of this UE of service in this notification message;

(c) said UE searches a P-CSCF again at visited network, or said UE switches to the circuit switching (CS) territory.

Further, said method also can have following characteristics: emergent operation request described in the step (a) is that Emmergency log-on or emergent session are set up.

Further, said method also can have following characteristics: notification message described in the step (b) is that emergent operation request is replied.

Further, said method also can have following characteristics: UE described in the said step (c) initiates emergent operation request or IP Multimedia System IMS register requirement to this P-CSCF after visited network finds P-CSCF again.

Further; Said method also can have following characteristics: after P-CSCF receives the emergent operation request of UE transmission in the said step (a); Find that oneself is not in the residing visited network of UE; Send a notification message to UE, carry the not information in the residing visited network of UE of P-CSCF in this notification message.

Further; Said method also can have following characteristics: after P-CSCF receives the emergent operation request of UE transmission in the said step (a); This emergent operation request is transmitted to the service call conversation control function S-CSCF of UE home network; After S-CSCF receives this emergent operation request, find this P-CSCF not in the residing visited network of UE, S-CSCF sends a notification message to this P-CSCF; Carry the not information in the residing visited network of UE of P-CSCF in this notification message, P-CSCF is forwarded to UE with this notification message.

Further; Said method also can have following characteristics: after P-CSCF receives the emergent operation request of UE transmission in the said step (a); This emergent operation request is transmitted to the emergency call session controlled function E-CSCF of UE home network; After E-CSCF receives this emergent operation request, find this P-CSCF not in the residing visited network of UE, E-CSCF sends a notification message to this P-CSCF; Carry the not information in the residing visited network of UE of P-CSCF in this notification message, P-CSCF is forwarded to UE with this notification message.

The present invention proposes a kind of processing method of urgency traffic, in user's roaming, and P-CSCF is not when visited network; Through send UE and P-CSCF not in the message of consolidated network to the user; After user UE receives this message, search the P-CSCF of visited network again and switch to the CS territory, initiate urgency traffic again; Thereby solved in the prior art problem that can't carry out urgency traffic that UE and P-CSCF do not bring at same network.Advantage of the present invention be judging point in network, judge very simple, very little to the change of system.

Description of drawings

Fig. 1 is a 3GPP2 urgent call Organization Chart;

Fig. 2 is the P-CSCF of 3GPP2IMS network and the example that PDSN adheres to heterogeneous networks separately;

Fig. 3 is a first embodiment of the invention, and P-CSCF discovery and UE be not at same network, and the prompting user initiates P-CSCF again and searches;

Fig. 4 is a second embodiment of the invention, and S-CSCF (service call conversation control function) finds UE and P-CSCF not at same network, and the prompting user initiates P-CSCF again and searches;

Fig. 5 is a third embodiment of the invention, and E-CSCF finds UE and P-CSCF not at same network, and the prompting user initiates P-CSCF again and searches.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment the present invention is done further detailed explanation, but not as to qualification of the present invention.

In the following exemplifying embodiment, UE (user terminal) is all at visited network, and all in home network, this is two various network to the P-CSCF of service-user UE.

First embodiment

Fig. 3 is a signaling process example of the present invention, and find that P-CSCF and UE be not in same network this moment when the P-CSCF of home network receives emergent operation request.Message processing step is following:

Step 110: the UE at visited network initiates emergent operation request, and this request can be an Emmergency log-on, or emergent session is set up;

Step 120: the P-CSCF of home network receives emergent operation request, and it judge to find oneself not in the residing visited network of UE, can to judge through the IP address of user UE, but is not limited to the IP address of user UE;

Step 130: the P-CSCF of home network sends emergent operation request and replys the UE to the user, carries the not information in the residing network of UE of P-CSCF in this response message;

Step 140: after user UE receives that this emergent operation request is replied, judge own and P-CSCF, need in visited network, to find again a new P-CSCF not at same network;

Step 150: user UE initiates new P-CSCF search procedure at visited network;

Step 160: the P-CSCF that user UE finds in visited network initiates emergent operation request or IMS register requirement, and subsequent step is consistent with the existing protocol flow process.

In another embodiment of the present invention, in step 140, after user UE receives that emergent operation request is replied; Judge own and P-CSCF not at same network, UE can switch to circuit switching (Circuit Switch, CS) territory; Use the urgency traffic in CS territory, finish.

Second embodiment

Fig. 4 has shown a signaling process example of the present invention, and find that P-CSCF and UE be not in same network this moment when the S-CSCF of home network receives emergent operation request.Message processing step is following:

Step 210: the UE at visited network initiates emergent operation request, and this request can be an Emmergency log-on, or emergent session is set up;

Step 220: the P-CSCF of home network is transmitted to request the S-CSCF of user UE home network;

Step 230: the S-CSCF of home network receives emergent operation request; It judges that discovery P-CSCF is not in the residing visited network of UE; This can judge through IP address and the P-CSCF address of user UE, be not limited to IP address and the P-CSCF address of user UE;

Step 240: the S-CSCF of home network sends emergent operation request and replys the P-CSCF to home network, carries the not information in the residing visited network of UE of P-CSCF during this is replied;

Step 250: the P-CSCF of home network replys this emergent operation request and is transmitted to user UE;

Step 260: after user UE receives that this emergent operation request is replied, judge own and P-CSCF, need in visited network, to find again a new P-CSCF not at same network;

Step 270: user UE initiates new P-CSCF search procedure at visited network;

Step 280: the P-CSCF that user UE finds in visited network initiates emergent operation request or IMS register requirement, and subsequent step is consistent with the existing protocol flow process.

In another embodiment of the present invention, in step 260, after user UE receives that emergent operation request is replied; Judge own and P-CSCF not at same network, UE can switch to circuit switching (Circuit Switch, CS) territory; Use the urgency traffic in CS territory, finish.

The 3rd embodiment

Fig. 5 has shown a signaling process example of the present invention, and find that P-CSCF and UE be not in same network this moment when the E-CSCF of home network receives emergent operation request.Message processing step is following:

Step 310: the UE at visited network initiates emergent operation request, and this request can be an Emmergency log-on, or emergent session is set up;

Step 320: the P-CSCF of home network is transmitted to this request the E-CSCF of user UE home network;

Step 330: the E-CSCF of home network receives emergent operation request; It judges that discovery P-CSCF is not in the residing visited network of UE; This can judge through IP address and the P-CSCF address of user UE, be not limited to IP address and the P-CSCF address of user UE;

Step 340: the E-CSCF of home network sends emergent operation request and replys to P-CSCF, carries the not information in the residing visited network of UE of P-CSCF during this is replied;

Step 350: the P-CSCF of home network replys this emergent operation request and is transmitted to user UE;

Step 360: after user UE receives that this emergent operation request is replied, judge own and P-CSCF, need in visited network, to find again a new P-CSCF not at same network;

Step 370: user UE initiates new P-CSCF search procedure at visited network;

Step 380: the P-CSCF that user UE finds in visited network initiates emergent operation request or IMS register requirement, and subsequent step is consistent with the existing protocol flow process.

In another embodiment of the present invention, in step 360, after user UE receives that emergent operation request is replied; Judge own and P-CSCF not at same network, UE can switch to circuit switching (Circuit Switch, CS) territory; Use the urgency traffic in CS territory, finish.

Among above-mentioned all embodiment; Said P-CSCF or S-CSCF or E-CSCF are not limited to use the emergent operation request response message to carry the not information in the residing network of UE of P-CSCF, also can a newly-built notification message be used for notifying the said P-CSCF of UE not in the information of UE network of living in.

Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.

Claims

1. the processing method of a urgency traffic comprises following steps:

(a) user terminal UE initiates Emmergency log-on to the Proxy Call Session Control Function P-CSCF of this UE of service; P-CSCF finds oneself not in the residing visited network of UE, to send a notification message to UE after receiving the Emmergency log-on of UE transmission, carries the not information in the residing visited network of UE of P-CSCF in this notification message;

(b) said UE receives the notification message from P-CSCF;

2. the method for claim 1, it is characterized in that: notification message described in the step (b) is that emergent operation request is replied.

3. the method for claim 1 is characterized in that: UE described in the said step (c) initiates emergent operation request or IP Multimedia System IMS register requirement to this P-CSCF after visited network finds P-CSCF again.

4. the processing method of a urgency traffic comprises:

(a) user terminal UE initiates emergent operation request to the Proxy Call Session Control Function P-CSCF of this UE of service; After P-CSCF receives the emergent operation request of UE transmission; This emergent operation request is transmitted to the service call conversation control function S-CSCF of UE home network; After S-CSCF receives this emergent operation request, find this P-CSCF not in the residing visited network of UE, S-CSCF sends a notification message to this P-CSCF; Carry the not information in the residing visited network of UE of P-CSCF in this notification message, P-CSCF is forwarded to UE with this notification message;

(b) said UE receives the notification message from P-CSCF;

5. method as claimed in claim 4 is characterized in that: emergent operation request described in the step (a) is that Emmergency log-on or emergent session are set up.

6. method as claimed in claim 4 is characterized in that: notification message described in the step (b) is that emergent operation request is replied.

7. method as claimed in claim 4 is characterized in that: UE described in the said step (c) initiates emergent operation request or IP Multimedia System IMS register requirement to this P-CSCF after visited network finds P-CSCF again.

8. the processing method of a urgency traffic comprises:

(a) user terminal UE initiates emergent operation request to the Proxy Call Session Control Function P-CSCF of this UE of service; After P-CSCF receives the emergent operation request of UE transmission; This emergent operation request is transmitted to the emergency call session controlled function E-CSCF of UE home network; After E-CSCF receives this emergent operation request, find this P-CSCF not in the residing visited network of UE, E-CSCF sends a notification message to this P-CSCF; Carry the not information in the residing visited network of UE of P-CSCF in this notification message, P-CSCF is forwarded to UE with this notification message;

(b) said UE receives the notification message from P-CSCF;

9. method as claimed in claim 8 is characterized in that: emergent operation request described in the step (a) is that Emmergency log-on or emergent session are set up.

10. method as claimed in claim 8 is characterized in that: notification message described in the step (b) is that emergent operation request is replied.

11. method as claimed in claim 8 is characterized in that: UE described in the said step (c) initiates emergent operation request or IP Multimedia System IMS register requirement to this P-CSCF after visited network finds P-CSCF again.