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IMS session switching implementation method and access switching control function device

A technology for session switching and control functions, applied in the field of communications, can solve the problems of no CS access registration and PS access registration and registration subscription, unable to obtain periodic refreshes, and no perception of user access network changes, etc. Reduce the effect of signaling interaction process and fast switching

Active Publication Date: 2017-12-29
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 3) In S-CSCF (Serving Call Session Control Function, Serving Call Session Control Function), the CS access registration and PS access registration are not associated with the registration subscription
[0009] 4) Except for the SCC AS, other user-related ASs (Application Servers, application servers) do not perceive changes in the user access network
[0010] 5) Due to reasons (3) and (4), except SCC AS, the registrations in other user-related ASs cannot be periodically refreshed, resulting in calls or partial services not being implemented correctly

Method used

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  • IMS session switching implementation method and access switching control function device
  • IMS session switching implementation method and access switching control function device
  • IMS session switching implementation method and access switching control function device

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Embodiment Construction

[0057] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0058] The embodiment of the present invention is a brand-new device and system supporting switching between PS and CS, but for the sake of easy understanding, the name ATCF used in the current prior art is followed. It should be noted that although it is still referred to as ATCF in the embodiment of the present invention, it is improved compared with the existing ATCF.

[0059] In the embodiment of the present invention, when the user passes through the PS-CS handover, the ATCF implements the registration and subscription renewal of the original access network. On this bas...

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Abstract

The present invention provides a method for implementing session switching of an IP multimedia subsystem, comprising: after the access switching control function ATCF receives a session switching request message from the first access network to the second access network, the designated session of the user is switched from the second access network to the second access network. An access network is handed over to a second access network; the ATCF determines whether to release the specified session of the first access network according to a local policy, and if so, performs session release; the ATCF determines whether to release the session according to a local policy Informing the application server related to the user that the access network of the user is changed; the first access network and the second access network are respectively one of the PS access network and the CS access network. The invention also provides an access switching control function. Utilizing the present invention, in call switching, it can not only realize faster switching than SRVCC technology, but also reduce some signaling interaction processes compared with eSRVCC.

Description

technical field [0001] The present invention relates to the communication field, and more specifically relates to a session switching method and an ATCF (Access Transfer Control Function, access switching control function) of an IP Multimedia Subsystem (IP Multimedia CoreNetwork Subsystem, referred to as IMS) network. Background technique [0002] IMS is an IP-based network architecture proposed by the 3rd Generation Partnership Project (3GPP), which builds an open and flexible service environment, supports multimedia applications, and provides users with rich multimedia business. [0003] At present, mobile communication is mainly based on Circuit Switch (CS) network, such as Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA). into IMS specifications and patents. [0004] In the specifications such as TS 24.292, 3GPP TS 23.237 and 3GPP TS 24.237, there are signaling and process descriptions for using ATCF to realize packet switching (Pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/14H04W36/34
Inventor 杨强王忱
Owner ZTE CORP