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Performance Evaluation of Load-Balancing Gateway Selection Method in Multi-hop Wireless Networks

Authors:
Shunsuke Fujiwara
Yuho Yamashita
Miki Yamamoto

Keywords: Wireless Multi-hop Network, Gateway Selection, Load Balancing.

Abstract:
In wireless multi-hop networks having multiple gateways to an external wired network, a host should select its connected gateway when it would like to communicate with an outside host. One possible and simple way is minimum hop gateway selection policy. In our previous study, we have already revealed that when the minimum hop gateway is selected, imbalance of traffic distribution in a network causes significant performance degradation. Wireless communication channel around the gateway is very important resource because all the external traffic goes through the gateway. So, in our previous work, we proposed load-balancing gateway selection, which takes account of not only traffic intensity at a gateway but also interference of wireless channel around a gateway. With a simple scenario, we showed that our proposed method improves gateway throughput performance. In this paper, we evaluate our proposed method with more sophisticated model and show that it improves throughput performance of load-concentrated gateway. We also show that it surprisingly improves throughput performance of not-load-concentrated gateway, i.e., this gateway obtains more throughput even though the number of its connected hosts is increased when our proposed method is applied. Our performance evaluation in this paper newly reveals that our proposed gateway selection method improves total network throughput by significantly reducing generated control packets for route error recovery.

Pages: 19 to 24

Copyright: Copyright (c) IARIA, 2012

Publication date: October 21, 2012

Published in: conference

ISSN: 2326-9286

ISBN: 978-1-61208-244-8

Location: Venice, Italy

Dates: from October 21, 2012 to October 26, 2012