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The cognitive radio network is intelligent in adapting to the dynamic network environment, and it also provides a new way to solve the application limitation of nowadays MAC protocols. In this paper, an adaptive MAC protocol selection scheme based on machine learning is proposed for cognitive radio networks. This scheme can combine the respective advantages of the competitive protocols and non-competitive...
The tradeoff between the interference to primary users’ (PUs) and secondary users’ (SUs) throughput is of great importance in cognitive radio networks. Both imperfect spectrum sensing and multi-channel access contention impact the tradeoff. In this paper, jointly considering imperfect spectrum sensing and multi-channel access contention from cross-layer perspective, we obtain the expressions of interference...
In wireless Ad hoc networks, using multi-channel technique on MAC layer to increase the network capacity is a promising technology. By extending the RTS/CTS mechanism of IEEE802.11 standard, we propose a busy tone-based multi-channel MAC protocol, which can significantly improve the network throughput by using busy tone to distribute the multiple channels and overcome the multi-channel hidden terminal...
This paper proposes a cross-layer adaptive cooperative MAC protocol (CAC-MAC) based on IEEE 802.11 DCF, which forms a complete Application-MAC-PHY layer framework. The main feature of CAC-MAC protocol is an adaptive selection of data transmission scheme according to packet length and instantaneous wireless channel conditions. Simulation results show that the novel protocol significantly improves the...
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