METHOD AND APPARATUS FOR EXCHANGING SIP OPTIONS MESSAGE FOR CAPABILITY DISCOVERY OF RICH COMMUNICATION SUITE IN A PORTABLE TERMINAL

摘要

A SIP OPTIONS message exchange method for Capability Discovery of RCS (Rich Communication Suite) in a mobile terminal, the SIP OPTIONS message exchange method comprising the steps of: requesting, from a server, a setting value related to transmission of a SIP OPTIONS message; Transmitting the SIP OPTIONS message to each of the identified number of contacts for each of the checked intervals for the contacts registered in the phone book, and transmitting a response message from each of the contacts that transmitted the SIP OPTIONS message And updating the RCS capability information of the corresponding contact according to the received response message.