The Research And Implementation Of WLAN Roaming Technology Based On The 802.11r

Currently, simple security policy is generally used to ensure high roaming speed, when wireless LAN fast roaming takes place. But it is difficult for simple security policy to support enterprise-class applications, because of the big security risk of that policy.Fast-roaming solution proposed by IEEE802.11r protocol in RSN network can ensure the security while significantly improving the roaming speed. IEEE802.11r protocol is proposed based on autonomous WLAN architecture. In this dissertation, a solution in the realization of WLAN roaming in RSN based on centralized WLAN architecture is proposed by studying IEEE802.11r protocol. Two specific aspects of the work are completed. Configuration commands of roaming strategy are added. Furthermore, the two processes of FT initial mobility domain association and the FT protocol are achieved. The solution can reduce the number of interaction frames during the roaming process to 4, thus accelerating the speed of wireless terminal roaming. In addition, the solution has enhanced wireless network security by using three-level key structures and achieves a secure fast roaming. Test results show that the process of roaming meets the protocol's requirement, roaming faster and the program effectively.