Method and device for realizing UE registration

Abstract

The invention discloses a method and device for realizing UE registration, which are used for realizing self-adaptive registration for the registration initiated by UE of a Tel-Uri which does not include a home domain name of the UE, so as to reduce the requirement on the UE and enlarge the access range of the UE. The method for realizing the UE registration comprises the steps: a proxy call state control function (P-CSCF) entity receives an initial session initiation protocol (SIP) registration message initiated by the UE by using a telephone uniform resource identifier (Tel-Uri) manner; the P-CSCF entity judges whether the SIP registration message includes UE home domain name information; and when the SIP registration message does not include the UE home domain name message, the P-CSCF entity generates UE home domain name information, adds the UE home domain name information to the SIP registration message, and sends the SIP registration message added with the UE home domain name information to an interrogating call session control function (I-CSCF) entity.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular, to a method and device for realizing UE registration. Background technique [0002] In the current IP Multimedia Subsystem (IMS) communication network, user equipment (UE) can be supported to use the Initial Session Protocol Uniform Resource Identifier (SIP-Uri) method to register, and UE can also be supported to use the phone number uniform resource identifier. (Tel-Uri) method to register. In the standard registration process, the SIP registration (Register) request message initiated by the UE should contain the UE's home domain domain name. Usually, the home domain domain name can be carried in the Request-Uri message header or the From message header. It can be obtained from the public UE identity (Public User Identity, Pui), or extracted from the private UE identity (Private User Identity, Pvi) information carried in the Authorization (Authorization) mess...

AI Technical Summary

Problems solved by technology

In the standard registration process, the SIP registration (Register) request message initiated by the UE should include the home domain domain name of the UE. Usually, the home domain domain name can be carried in the Request-Uri message header or the From message header. obtained from the public UE identity (Public User Identity, Pui), or from the private UE identity (Private User Identity, Pvi) information carried in the authorization (Authorization) message header, but there are also SIP Registers initiated by the UE It is possible that this information was not included in the request message

[0003] Therefore, the existing IMS core network proxy call session control function (Proxy Call Session Control Function, P-CSCF) entity (referred to as P-CSCF) is not compatible with the registration of the UE identity in the Tel-Uri manner

[0004] like figure 1 As shown, during the registration process required by the IMS protocol, the P-CSCF will receive the SIP Register signaling message initiated by the UE side, and obtain the Uri in the From message header; if the type is not Tel-Uri type, it can be directly in the Extract the domain name from Uri and continue the follow-up normal processing flow; if the type is Tel-Uri type, you need to judge whether there is an Authorization header in the message, if it exists, continue the follow-up normal processing flow, if it does not exist, it is due to the lack of necessary UE The domain name of the home domain, so that processing such as routing and forwarding cannot be completed, and only an error response can be returned

In the prior art, when Tel-Uri registration lacks the necessary domain name information of the UE's home domain, the P-CSCF will reply to the UE with a 4XX / 5XX series of registration failure responses, such as figure 2 shown

[0005] To sum up, in the prior art, for the registration initiated by the UE that does not include the Tel-Uri of the UE's home domain domain name, the registration and subsequent other services cannot be completed normally, thus reducing the scope of the system's support for the UE, and putting forward a relatively large number of problems for the UE. demanding

Images