METHOD OF SELECTIVE ENCRYPTING CONTROL SIGNAL USING FLOW IDENTIFIER

摘要

PURPOSE: A method for selectively encrypting a control signal using a flow identifier is provided to use a control signal selectively encrypted by a base station and a mobile station, thereby protecting confidentiality of the control signal. CONSTITUTION: A mobile station transmits an SBCREQ(Subscribe Station Basic Capability request) message for a basic capability negotiation to a base station(S110). The SBC-REQ message includes a security negotiation parameter. The base station transmits an SBC-RSP(Subscribe Station Basic Capability-Response) message to the mobile station(S120). The mobile station and the base station perform an applying process of the basic capability negotiation(S130). The base station selectively encrypts a control message(S140).