Collision-load Balancing Topology Control with Rate Adaptation for Wireless Mesh Networks

This paper discusses the QoS topology control problem with consideration of power control and rate adaptation in wireless mesh networks. Our task is to construct a routing forest (a set of trees rooted from the gateway nodes), configure the transmission power of each node, such that the constructed network topology can meet the delivery threshold for all nodes and the system throughput is maximized. We consider transmission rate adaptation in this paper, i.e., the data rate over a link depends on the signal strength at recipient node. Combining with power control and rate adaptation, we propose a collision-load balancing method to construct the routing trees. Our experiments show that power control and rate adaptation scheme can improve the system performance more effectively. Simulation results have also shown that our method can significantly improve the network throughput, compared with shortest path tree (SPT) method.