An Adaptive Traffic Load Balancing Method for Multi-Hop Mesh Networks in Broadband Fixed Wireless Access Systems

Yoji KISHI  Takeshi KITAHARA  Yujin NOISHIKI  Akira IDOUE  Shinichi NOMOTO  

IEICE TRANSACTIONS on Communications   Vol.E88-B   No.4   pp.1355-1363
Publication Date: 2005/04/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.4.1355
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Internet Technology V)
BFWA,  multi-hop mesh networks,  traffic engineering,  MPLS,  traffic load balancing,  

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Broadband fixed wireless access (BFWA) systems with multi-hop mesh topologies have attracted considerable attention as a promising technology for next generation, high quality, high capacity, and high density access infrastructures. The primary advantages of mesh network topologies are an improvement of capacity by means of traffic engineering throughout the networks. This paper discusses an adaptive traffic load balancing method that maximizes the capacity for the mesh BFWA networks. Taking into account the variation of network conditions such as traffic demand distributions and qualities of wireless links, the adaptive traffic load balancing method attempts to equalize the utilization of capacity for each wireless link. To avoid deteriorating the performance of TCP communications, the proposed method implements flow-based traffic load balancing. Performance of the proposed adaptive traffic load balancing method is demonstrated and validated using the experimental mesh network environments with wired networks with up to sixteen nodes that emulates the variation of the wireless link capacity.