Computer Science ›› 2014, Vol. 41 ›› Issue (3): 105-109.

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Moving Speed Aware of Fast Handoff Investigation in IEEE 802.11Networks

WU Yan-ling,LI Ming and HAN Qing-tao   

  • Online:2018-11-14 Published:2018-11-14

Abstract: Wireless Local Area Networks (WLANs) could provide possibilities to mobile users benefiting wireless ser-vices through Access Points (APs).Furthermore,mobile users could move freely in such wireless environment.How-ever,handoffs could be triggered while crossing different WLANs.In the most of existing literatures,the authors did not consider the case that mobile users change suddenly the moving direction during handoff procedures,to enter another WLAN.This paper proposed a Fast Handoff algorithm based moving speed (FHBS) with taking into account the moving direction and moving velocity.Since the network resources are scheduled by Access Control Centers (ACCs),a fast scheduling mechanism is established.Because information of all available channels is broadcasted by ACCs,the access collisions caused by nodes which initiate handovers are eliminated.As the consequence,an outstanding performance is achieved.Simulation results show that FHBS can improve the packet loss,the handoff blocking probability and the handoff latency by about 14%,14% and 55%,respectively.

Key words: Wireless local area network,Moving speed,Moving direction,Fast handoff,Quality of service

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