Title :
A Neighbor Caching Mechanism for Handoff in IEEE 802.11 Wireless Networks
Author :
Li, Chung-Sheng ; Tseng, Yung-Chih ; Chao, Han-Chieh
Author_Institution :
Nat. Dong Hwa Univ., Hualien
Abstract :
Seamless handover in IEEE 802.11 for quality of service (QoS) demanding applications is one of the critical issues because of handover latency. In this paper, we proposed the neighbor graph cache (NGC) mechanism to reduce scanning latency while a mobile station tries to make a link-layer handover. The handoff latency can be greatly reduced through NGC algorithm. We use OPNET modeler as the simulation tool. The simulation results show that the handover delay by NGC is 2.614 ms. It is less than 50 ms and able to meet the criteria of VoIP application.
Keywords :
Internet telephony; cache storage; data structures; graph theory; mobile radio; quality of service; wireless LAN; IEEE 802.11; OPNET modeler; QoS demanding applications; VoIP application; handoff; handover latency; link-layer handover; mobile station; neighbor graph cache; quality of service; scanning latency; seamless handover; wireless networks; Access protocols; Authentication; Chaos; Delay; Electronic switching systems; Multimedia systems; Probes; Quality of service; Signal design; Wireless networks;
Conference_Titel :
Multimedia and Ubiquitous Engineering, 2007. MUE '07. International Conference on
Conference_Location :
Seoul
Print_ISBN :
0-7695-2777-9
DOI :
10.1109/MUE.2007.32
