METHOD FOR PROCESSING CSFB OR SRVCC DURING SIPTO SERVICE

摘要

Provided according to a disclosure of the present specification is a method for processing a circuit switched fall-back (CSFB) or a single radio voice call continuity (SRVCC) during a selected IP traffic offload (SIPTO) service. The method for processing a CSFB or a SRVCC during a SIPTO service in a network entity responsible for a control plane in a mobile communication network comprises the steps of: in a state in which a first packet data network (PDN) connection has been established for a terminal, establishing a second PDN connection according to the application of the SIPTO service while maintaining the first PDN connection; if CSFB or SRVCC is requested, determining which to release from among the first PDN connection and the second PDN connection; and releasing the any one PDN connection which has been determined.

主权项

1. A method for processing Circuit Switched Fall Back (CSFB) or Single Radio Voice Call Continuity (SRVCC) during a Selected IP Traffic Offload (SIPTO) service, the method performed by a network entity responsible for a control plane in a mobile communication network and the method comprising:
establishing a second Public Data Network (PDN) connection according to an usage of the SIPTO service in a state where a first PDN connection is established for a user equipment (UE), while maintaining the first PDN connection; determining any one PDN connection to release among the first PDN connection and the second PDN connection when CSFB or SRVCC is requested; and releasing the determined PDN connection.