Comparison of Throughput Performance for the IEEE 802.11a and 802.11g Networks
AINA '07 Proceedings of the 21st International Conference on Advanced Networking and Applications
B-EDCA: A QoS mechanism for multimedia communications over heterogeneous 802.11/802.11e WLANs
Computer Communications
A survey on MAC protocols for cognitive radio networks
Ad Hoc Networks
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
A reservation based backoff method for video streaming in 802.11 home networks
IEEE Journal on Selected Areas in Communications
IEEE Transactions on Parallel and Distributed Systems
The nominal capacity of wireless mesh networks
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
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
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
Optimal Channel Sensing Order for Various Applications in Cognitive Radio Networks
Wireless Personal Communications: An International Journal
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Due to the proliferation of diverse network devices with multimedia capabilities, there is an increasing need for Quality of Service (QoS) provisioning in wireless networks. The MAC layer protocol with enhanced distributed channel access (EDCA) in the IEEE 802.11-2007 is able to provide differentiated QoS for different traffic types in wireless networks through varying the Arbitration Inter-Frame Spaces (AIFS) and contention window sizes. However, the performance of high priority traffic can be seriously degraded in the presence of strong noise over the wireless channels. Schemes utilizing adaptive modulation and coding (AMC) technique have also been proposed for the provisioning of QoS. 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 and 5 GHz spectrum, most IEEE 802.11-based multi-hop ad hoc networks today use only a single channel at anytime. As a result, these networks cannot fully exploit the aggregate bandwidth available in the radio spectrum provisioned by the standards. 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 (MQPP) for 802.11-based cognitive radio networks (CRNs) 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.