Wireless local area network

Wireless local area network (WLAN) is the combination of computer network and wireless communication technology, which has been widely used at present. Because of the limitation of AP's power in WLAN lead to a restriction of the service coverage area, the mobile station (STA) need fast handover when crossing the zone from the current coverage cell to another cell. The problem about cross-zone handover is the key issue of the current application technology in WLAN, which not only is related to the reliability and security of network processing, but the continuous quality of voice and video's real-time multimedia application. It should be pointed out that handovers first have to occur on the MAC layer, on the other hand, most of the handovers are just on the MAC layer. Therefore, there are important theoretical significance and practical value for the research on the cross-zone handoff technology based on the MAC layer.Based on the relevant literatures at home and abroad, in this dissert...更多ation the work are finished as follows:1. The status of current researches in terms of domestic and foreign handover technology based on the MAC layer in WLAN are analyzed and summarized.