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1. (WO2018141114) METHOD AND DEVICE FOR IDENTIFYING PDN CONNECTION FOR IMS SERVICE

Pub. No.:    WO/2018/141114    International Application No.:    PCT/CN2017/073001
Publication Date: Fri Aug 10 01:59:59 CEST 2018 International Filing Date: Tue Feb 07 00:59:59 CET 2017
IPC: H04W 76/02
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
WANG, Lu
Inventors: WANG, Lu
GAN, Juying
Title: METHOD AND DEVICE FOR IDENTIFYING PDN CONNECTION FOR IMS SERVICE
Abstract:
Embodiments of the present disclosure relate to a method and device for identifying a Packet Date Network (PDN) connection for an Internet Protocol (IP) Multimedia Subsystem (IMS) service. In example embodiments, after a serving node in a packet switched core network receives, from a terminal device, a first request for establishing a PDN connection, the serving node determines whether the PDN connection is to be established for an IMS service. If it is determined that the PDN connection is to be established for the IMS service, the serving node stores an identification of the IMS service for the PDN connection for a restoration of the PDN connection at a later instant. Accordingly, in a restoration of the PDN connection at a later instant, the serving node may facilitate only the PDN identified for the IMS service. In this way, the restoration of the PDN connection is more effective and efficiently.