Patent ID: 8572384
Filing Date: 2013-10-29
Classification: H04L,H04W

Abstract:
1. A method for operating a mobile station in an idle mode to update a Pairwise Master Key (PMK)/Authorization Key (AK) in a wireless communication system, the method comprising: transmitting a first location update request to a base station, the first location update request including a request for updating the PMK/AK; receiving a first response to the first location update request from the base station, the first response to the first location update request including a NONCE_BS, wherein the NONCE_BS is a random number associated with the base station and used for updating the PMK of the PMK/AK; generating a NONCE_MS, wherein the NONCE_MS is a random number used for updating the PMK; generating the PMK/AK using the NONCE_BS and the NONCE_MS; transmitting a second location update request to the base station, the second location update request including the NONCE_BS and the NONCE_MS; receiving a second response to the second location update request from the base station, the second response to the second location update request including the NONCE_BS and the NONCE_MS; and confirming the PMK/AK based on the NONCE_BS and the NONCE_MS.