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

fYear

2007

fDate

26-28 April 2007

Firstpage

48

Lastpage

53

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Multimedia and Ubiquitous Engineering, 2007. MUE '07. International Conference on

Conference_Location

Seoul

Print_ISBN

0-7695-2777-9

Type

conf

DOI

10.1109/MUE.2007.32

Filename

4197248