MAC Protocol for Opportunistic Cognitive Radio Networks with Soft Guarantees
IEEE Transactions on Mobile Computing
A practical QoS solution to voice over IP in IEEE 802.11 WLANs
IEEE Communications Magazine
Multihop cognitive radio networks: to route or not to route
IEEE Network: The Magazine of Global Internetworking - Special issue title on networking over multi-hop cognitive networks
The nominal capacity of wireless mesh networks
IEEE Wireless Communications
IEEE Wireless Communications
Provisioning of multimedia services in 802.11-based networks: facts and challenges
IEEE Wireless Communications
The capacity of wireless networks
IEEE Transactions on Information Theory
A survey on wireless mesh networks
IEEE Communications Magazine
Channel Assignment Strategies for Multiradio Wireless Mesh Networks: Issues and Solutions
IEEE Communications Magazine
Spectrum sensing in cognitive radio networks: requirements, challenges and design trade-offs
IEEE Communications Magazine
A survey on spectrum management in cognitive radio networks
IEEE Communications Magazine
Spatiotemporal Sensing in Cognitive Radio Networks
IEEE Journal on Selected Areas in Communications
Low-Complexity Adaptive Transmission for Cognitive Radios in Dynamic Spectrum Access Networks
IEEE Journal on Selected Areas in Communications
HC-MAC: A Hardware-Constrained Cognitive MAC for Efficient Spectrum Management
IEEE Journal on Selected Areas in Communications
Cognitive Wireless Mesh Networks with Dynamic Spectrum Access
IEEE Journal on Selected Areas in Communications
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MAC protocols utilising the enhanced distributed channel access in IEEE 802.11-2007 can provide differentiated QoS in wireless networks. However, the performance of high priority traffic can be seriously degraded in the presence of strong noise over the wireless channels. Schemes utilising adaptive modulation and coding technique have also been proposed for QoS provisioning. They can provide limited protection in the presence of noise but are ineffective in a high noise scenario. Although multiple non-overlapped channels exist in the 2.4 GHz and 5 GHz spectrum, most IEEE 802.11-based multi-hop ad hoc networks today use only a single channel at anytime and cannot fully exploit the aggregate bandwidth available in the radio spectrum. By identifying vacant channels through the use of cognitive radios technique, the noise problem can be mitigated by distributing network traffic across multiple vacant channels to reduce the node density per transmission channel. In this paper, we propose the MAC-layer QoS provisioning protocol which combines adaptive modulation and coding with dynamic spectrum access. Simulation results demonstrate that MQPP can achieve better performance in terms of lower delay and higher throughput.