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Method for consulting updating time in SIP session refreshing process

A technology of update time and duration, applied in the field of communication, can solve problems such as reduced user experience, waste of network bandwidth, and increased connection time, so as to reduce interactive traffic, reduce call response time, and improve user experience.

Active Publication Date: 2012-12-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] It can be seen from the above process that the negotiation process of the session refresh mechanism may return 422 responses to UAC multiple times, resulting in UAC having to use the new SE in the 422 response to re-initiate the call, and if the user hangs up the phone, continue next time When the call is called, the above negotiation mechanism has to be repeated
In such multiple interactions, the network bandwidth is drastically wasted. In addition, the ringing of the user's call and the duration of the connection are significantly increased, and the user experience is reduced.
If the call is busy, it will seriously affect the network processing performance

Method used

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  • Method for consulting updating time in SIP session refreshing process
  • Method for consulting updating time in SIP session refreshing process
  • Method for consulting updating time in SIP session refreshing process

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Embodiment Construction

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] In order to realize the purpose of the present invention, a session duration association table (SE POLICY TABLE, referred to as SPT) is maintained locally at the UAC, and this entry includes the called identification, such as the called SIP Uniform Resource Identifier (SIP Uniform Resource Identifier, SIP URI for short), Proxies on the call path and their corresponding SE information. This SPT is empty after UAC starts or registers.

[0042] Please note that the SPT entry includes the SE information of all Proxies on the path, or is it the SE information of one Proxy and its corresponding SE information?

[0043] image 3 It is a flow chart of the initial SIP call session refresh negotiation and establishment of the SPT table for a specified called party. In this process, the SE information determined during the session nego...

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Abstract

The invention discloses a method for consulting the updating time in an SIP session refreshing process. A UAC searches and acquires routing session duration time SE information in a session duration time association table SPT of a UAC and UAS session and initiates a session request to at least one proxy server between the UAC and a UAS when initiating a session with a session request to a UAS; atleast one proxy server acquires the SE information and forwards the SE information until reaching the UAS by comparing the minimum session duration time value MSE allowed by the at least one proxy server if the SE is larger than the MSE; the MSE as a new SE is returned to the UAC so as to reinitiate a session if the SE is smaller than the MSE; and the received SE information is returned to the SPT table when the UAS receives the session request. Therefore, the invention can reduce the interactive traffic of SIP messages, reduce the calling request time and improve the user experience.

Description

technical field [0001] The invention relates to the field of communication, and more specifically relates to a method for reducing network traffic during a SIP session refreshing process. Background technique [0002] In many current communication systems, the control layer adopts the Session Initiation Protocol (Session Initiation Protocol, SIP for short) as the control signaling. SIP defines a session refresh mechanism in RFC4028. A terminal supporting RFC4028 will periodically send a dialog request (re-INVITE) or a refresh request (UPDATE) to keep the session active. The session update request interval is determined by the negotiation mechanism of RFC4028. If no session update request is received within the interval, the session is considered terminated. The terminal sends an end session (BYE) message, and the stateful proxy server removes all state of the call. [0003] In the SIP session refresh mechanism, the SIP message body extends two header fields: the session ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L12/56H04L12/801
Inventor 任鹏苏登军
Owner ZTE CORP
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