Proposal of a Reaction-Diffusion Based Congestion Control Method for Wireless Mesh Networks

This paper proposes a congestion control method for a wireless mesh network. Each intermediate node has separate transmission buffers for each of next hop nodes. By following the mathematical reaction-diffusion formulation, an intermediate node simultaneously performs 'Local optimization' control that balances buffer occupancy among its transmission buffers and 'Global optimization' control that suppresses the variation in occupancy between intermediate nodes along the path. As a result, packets are distributed over the whole path and further a network and buffer overflow is prevented. The results of the authors' simulation show that the proposed method can provide better communication quality under loaded condition.