Self-Adjustable Rate Control for Congestion Avoidance in Wireless Mesh Networks

Youngmi BAEK  Kijun HAN  

Publication
IEICE TRANSACTIONS on Communications   Vol.E97-B   No.11   pp.2368-2377
Publication Date: 2014/11/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E97.B.2368
Type of Manuscript: PAPER
Category: Network
Keyword: 
multi-hop wireless mesh networks,  congestion avoidance,  rate control,  QoS,  space vector model,  

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Summary: 
In this paper, we investigate the problems of the established congestion solution and then introduce a self-adjustable rate control that supports quality of service assurances over multi-hop wireless mesh networks. This scheme eliminates two phases of the established congestion solution and works on the MAC layer for congestion control. Each node performs rate control by itself so network congestion is eliminated after it independently collects its vector parameters and network status parameters for rate control. It decides its transmission rate based on a predication model which uses a rate function including a congestion risk level and a passing function. We prove that our scheme works efficiently without any negative effects between the network layer and the data link layer. Simulation results show that the proposed scheme is more effective and has better performance than the existing method.