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Dynamic Channel Assignment with Effective Recovery Method in Wireless Ad Hoc Networks

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2 Author(s)
Chien-Min Wu ; NanHua University, Department of Computer Science and Information Engineering, E-mail: cmwu@mail.nhu.edu.tw, m9538@cn.ee.ccu.edu.tw ; Yi-Yuan Wang

From the channel assignment schemes in time division multiple access (TDMA) slot assignment protocols developed in previous studies, we have found that these protocols do not have a convenient frame length shrink scheme after the expansion of the frame length. As the network size grows, the frame length expands quickly, particularly when we set the frame length as a power of two. A very long frame may result in poor channel utilization when it contains many unused slots. In this paper, we propose a dynamic frame length expansion and recovery method called dynamic frame length channel assignment (DFLCA). This strategy is designed to make better use of the available channels by taking advantage of the spatial reuse concept. In DFLCA, the increase in the spatial reuse is achieved by adding certain amount of control overhead. We show that the bandwidth saved due to the channel spatial reuse is larger than the additional bandwidth spent on the control overhead.

Published in:

2007 IFIP International Conference on Wireless and Optical Communications Networks

Date of Conference:

2-4 July 2007