Abstract
With the rapid increase of the wireless applications, the cognitive radio network as a promising solution has attracted a lot of researches in recent years. One of the critical issues is to solve the rendezvous problem by using one radio. Especially, Unmanned Aerial Vehicles (UAVs), embedded devices or smart devices usually can only equip one radio for various reasons, including energy-saving, cost-saving and size-constraint. In this paper, we present a multi-channel cognitive MAC protocol, namely CogMOR-MAC, which is based on Multi-channel Opportunistic Reservation (MOR) mechanism. The MOR mechanism focuses on solving the rendezvous problem and improving the negotiation efficiency by using only one radio. And the presented MOR mechanism is also used to reduce the impact on frequency hopping and avoid the primary user activities. In the performance evaluation, typical metrics are considered on the performance, such as packet success rate, link latency, link throughput, channel utilization, etc. CogMOR-MAC is also compared with other multi-channel cognitive MAC protocol on performance. The result shows that CogMOR-MAC can adapt to Primary User (PU) activities environment more effectively and provide a reliable communication. Of course, it is not only suitable for the multi-UAVs ad hoc networks, but also can be applied to mobile ad hoc network or wireless sensor network, especially in the severely interfered environment.
Published Version
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