A neighbor caching mechanism for handoff in IEEE 802.11 wireless networks

Authors:
Chung-Sheng Li;Yung-Chih Tseng;Han-Chieh Chao;Yueh-Min Huang
Affiliations:
Department of Electrical Engineering, National Dong Hwa University, Hualien, Taiwan;Department of Electrical Engineering, National Dong Hwa University, Hualien, Taiwan;Department of Electrical Engineering, National Dong Hwa University, Hualien, Taiwan and Department of Electronic Engineering, National Ilan University, I-Lan, Taiwan;Department of Engineering Science, National Cheng Kung University, Tianan, Taiwan
Venue:
The Journal of Supercomputing
Year:
2008

Citing 2
Cited 1

802.11 Wireless Networks: The Definitive Guide

802.11 Wireless Networks: The Definitive Guide
An empirical analysis of the IEEE 802.11 MAC layer handoff process

ACM SIGCOMM Computer Communication Review

OPNET-based modeling and simulation study on handoffs in Internet-based infrastructure wireless mesh networks

Computer Networks: The International Journal of Computer and Telecommunications Networking

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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 propose 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 the NGC algorithm. We used 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.