Patent ID: 8948164
Filing Date: 2015-02-03
Classification: H04L,H04W

Abstract:
1. A terminal capable of providing a circuit switched (CS) service, a session initiation protocol (SIP)-based service, or a combination of the CS service and an IP multimedia subsystem (IMS), the terminal comprising: a controller configured to receive a terminal capability version of at least one target terminal, to obtain a first comparison result by comparing the received terminal capability version with a previously stored terminal capability version of the at least one target terminal, and to request for terminal capability information of the at least one target terminal if the received terminal capability version of the at least one target terminal is different from the previously stored terminal capability version of the at least one target terminal based on the first comparison result, wherein if the received terminal capability version of the at least one target terminal is the same as the previously stored terminal capability version of the at least one target terminal, then the controller bypasses requesting for the terminal capability information of the at least one target terminal from the at least one target terminal, and proceeds with a CS or IMS process, wherein the terminal capability version identifies a version of capabilities of the at least one target terminal, and wherein the terminal capability version of the at least one target terminal has a value in a user equipment capability version-XX (UCV-XX) form, where XX is a 2-digit hexadecimal number.