1. A method for updating a session in a terminal, comprising: a) performing one or more services with one or more entities; b) transmitting, to a management server, a capability information update message including information about one or more changed capabilities, when one or more capabilities change, in order to notify the one or more entities of the one or more changed capabilities, wherein the information about the one or more changed capabilities comprises a parameter indicating a version of the information about the one or more changed capabilities; and c) updating a session with the one or more entities by using the information about the one or more changed capabilities.