Radio Channel Allocation Technique for CSMA/CA-Based Wireless Mesh Networks Solution to Exposed Terminal Problem

摘要

This paper proposes a channel allocation principle that prevents TCP throughput degradation for multihop transmission in a mesh network based on the CSMA/CA MAC protocol. We first address the relationship between network topology of wireless nodes and the TCP throughput degradation based on computer simulations. The channel allocation principle is discussed in terms of resolution into node chromatic issues based on throughput degradation. The number of required channels for the proposed channel allocation principle is evaluated and it is shown that two channels are sufficient for more than 96% of simulated pattern.