Patent ID: 8107629
Filing Date: 2012-01-31
Classification: H04L,H04W

Abstract:
1. A method of providing security for a relay station, which is provided to a mobile communication system for relaying communications between a base station and a mobile station, the method comprising: performing, by the relay station, an authentication of the relay station to an authentication server using an authentication protocol; receiving, by the relay station, an authentication server master key; deriving, by the relay station, an authentication key from the received authentication server master key; deriving, by the relay station, a message authentication code (MAC) key using the derived authentication key; relaying, by the relay station, a signal between the mobile station and the base station according to a control signal sent from the relay station to the base station; performing, by the relay station, a handover from the base station to a second base station; and executing, by the relay station, a ranging procedure for transmission parameter adjustment and management connection identifier (CID) and security associated parameter updates of the relay station with respect to the second base station, wherein the control signal is sent to the base station using the derived MAC key, and wherein the relay station comprises a mobile relay station.