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1. (WO2017157144) SIP OVER TCP/TLS-BASED COMMUNICATION METHOD AND ASSOCIATED DEVICE

Pub. No.:    WO/2017/157144    International Application No.:    PCT/CN2017/074382
Publication Date: Fri Sep 22 01:59:59 CEST 2017 International Filing Date: Thu Feb 23 00:59:59 CET 2017
IPC: H04W 76/04
H04L 29/06
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors: XU, Yongguo
徐永国
Title: SIP OVER TCP/TLS-BASED COMMUNICATION METHOD AND ASSOCIATED DEVICE
Abstract:
The invention relates to the field of communications, and in particular, to a session initiation protocol (SIP) over transmission control protocol (TCP)/ transport layer security (TLS)-based communication method and an associated device. The communication method comprises: after a network disconnection, a mobile terminal and a session border controller (SBC) maintain a service alive, and the SBC does not release a session resource allocated to the mobile terminal; after a network connection recovers, the SBC checks, using association information provided by the mobile terminal, association validity, if the association validity passes, the SBC uses the session resource allocated to the mobile terminal prior to the network disconnection to initiate to a call session control function (CSCF) a periodic registration; and after the network connection recovers, the mobile terminal further transmits to the SBC medium stream data to enable the SBC to learn from a first packet once the association validity passes. Accordingly, the terminal can realize calling service continuation without re-initiating another call, reducing service downtime, and increasing service experience.