On-Demand Carrier Sense and Hidden Node Interference-Aware Channel Reservation Scheme for Common Traffic in Wireless Mesh Network

The problem of channel assignment in a multi-radio multichannel wireless mesh network (WMN) has proved to be an NP-Complete problem. As a result, assigning channel to every link on the network will increase the channel reuse at the carrier sense and hidden node ranges. According to the IEEE, the node converge area is divided into three ranges, communication, carrier sense, and hidden node ranges, which has a different impact on the channel throughput. According to the experiment, we observed that the channel reuse at the hidden node range has a higher impact on the channel throughput even for a small number of nodes. Accordingly, we propose a centralized on-demand channel reservation scheme with the aims of minimizing the total channel reuse at the hidden node range and preventing channel congestion. Our simulation results demonstrate that our protocol significantly increases the aggregated goodput of multi-radio multichannel wireless mesh networks.

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