HIGH-SPEED ROAMING SERVICE METHOD IN WIRELESS NETWORK

摘要

PURPOSE: A high-speed roaming service method in a wireless network is provided to enable an authentication server to propagate security key information necessary for a roaming function of a mobile terminal to adjacent access points, in order to carry out a re-access process with the mobile terminal by a security key, thereby reducing time for roaming. CONSTITUTION: A mobile terminal and an AP_A obtain a PTK(Pairwise Transient Key) and an RK(Roam Key) by a PMK(Pairwise Master Key) supplied from an AAA server(901). The mobile terminal obtains a next PMK to be supplied to adjacent APs by using the RK(903), and transmits the obtained next PMK to adjacent APs(905,907). If the mobile terminal moves to an AP_B, the mobile terminal and the AP_B obtain a PTK and an RK(909). A security system is set between the mobile terminal and the AP_B. The AP_B obtains a next PMK to be supplied to next adjacent APs by using the obtained RK, and transmits the obtained next PMK to the adjacent APs(913-915).