Performance analysis of digital transmission systems
Performance analysis of digital transmission systems
Joint optimal access point selection and channel assignment in wireless networks
IEEE/ACM Transactions on Networking (TON)
Fairness and load balancing in wireless LANs using association control
IEEE/ACM Transactions on Networking (TON)
Analysis of Cross-Layer Interaction in Multirate 802.11 WLANs
IEEE Transactions on Mobile Computing
Collision Avoidance and Mitigation in Cognitive Wireless Local Area Network over Fibre
INTERNET '09 Proceedings of the 2009 First International Conference on Evolving Internet
Throughput analysis of IEEE 802.11 WLANs with automatic rate fallback in a lossy channel
IEEE Transactions on Wireless Communications
An autonomous cognitive access point for Wi-Fi hotspots
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Designing a practical access point association protocol
INFOCOM'10 Proceedings of the 29th conference on Information communications
IEEE Transactions on Information Theory
Channel assignment schemes for infrastructure-based 802.11 WLANs: A survey
IEEE Communications Surveys & Tutorials
Large-scale wireless LAN design
IEEE Communications Magazine
Interworking architecture between 3GPP and WLAN systems
IEEE Communications Magazine
Optimized video streaming over 802.11 by cross-layer signaling
IEEE Communications Magazine
Performance analysis of the IEEE 802.11 distributed coordination function
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
Saturation throughput analysis of IEEE 802.11e enhanced distributed coordination function
IEEE Journal on Selected Areas in Communications
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
Cognitive Medium Access: Constraining Interference Based on Experimental Models
IEEE Journal on Selected Areas in Communications
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In wireless local area networks (WLANs) made up of Extended Service Sets, access point (AP) selection is a key issue to improve the network performance and balance the traffic load. WLANs operating in the shared Industrial, Scientific and Medical band can benefit from the use of cognitive radio (CR) techniques to enable dynamic access to spectrum holes that are free from interference. In this paper, we propose an optimal Green AP Selection (GAPS) scheme, in which AP selection is optimized to maximize the system throughput while minimizing the energy consumption, for multi-rate WLANs enhanced by CRs. Different from most existing AP selection schemes, GAPS takes into account of the state transition tendency of APs and the influence of Automatic Rate Fallback mechanism in the Distributed Coordination Function. The AP selection problem is formulated as a restless bandit problem and solved by the primal-dual index heuristic algorithm based on first order relaxation to yield the GAPS scheme with the "indexability" property and hence a low complexity. GAPS is further divided into offline computation, which accounts for the bulk of the computations, and online selection, with a low complexity to facilitate implementation. Extensive simulation results illustrate the significant performance improvements of GAPS compared with existing AP selection schemes in different scenarios.