A note on greedy algorithms for the maximum weighted independent set problem
Discrete Applied Mathematics
Utilization and fairness in spectrum assignment for opportunistic spectrum access
Mobile Networks and Applications
Opportunistic spectral usage: bounds and a multi-band CSMA/CA protocol
IEEE/ACM Transactions on Networking (TON)
Energy optimal control for time-varying wireless networks
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
A survey on spectrum management in cognitive radio networks
IEEE Communications Magazine
Dynamic power allocation and routing for time-varying wireless networks
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
CrowdMAC: a crowdsourcing system for mobile access
Proceedings of the 13th International Middleware Conference
Optimal scheduling and power allocation in cooperate-to-join cognitive radio networks
IEEE/ACM Transactions on Networking (TON)
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In this paper, we consider the problem of optimal control for throughput utility maximization in cognitive radio networks with dynamic user arrivals and departures. The cognitive radio network considered in this paper consists of a number of heterogeneous sub-networks. These sub-networks may be power-constrained and are required to operate in such a way that the average total interference received on primary channels are kept below given thresholds. We develop a control policy that performs joint admission control and resource scheduling. Through Lyapunov optimization techniques, we show that the proposed policy achieves a utility performance within O(δ) of optimality for any positive δ. We further show that this arbitrarily closeness to optimality comes at the price of having a delay that is O(1/δ) in admitting users. We also propose constant factor approximations of the policy for distributed implementation.