Latency of wireless sensor networks with uncoordinated power saving mechanisms
Proceedings of the 5th ACM international symposium on Mobile ad hoc networking and computing
Impact of interferences on connectivity in ad hoc networks
IEEE/ACM Transactions on Networking (TON)
Distributed energy management algorithm for large-scale wireless sensor networks
Proceedings of the 8th ACM international symposium on Mobile ad hoc networking and computing
On the latency for information dissemination in mobile wireless networks
Proceedings of the 9th ACM international symposium on Mobile ad hoc networking and computing
Optimal Transmission Strategies for Dynamic Spectrum Access in Cognitive Radio Networks
IEEE Transactions on Mobile Computing
Asymmetry-aware real-time distributed joint resource allocation in IEEE 802.22 WRANs
INFOCOM'10 Proceedings of the 29th conference on Information communications
Resilience to degree-dependent and cascading node failures in random geometric networks
IEEE Transactions on Information Theory
Cognitive Medium Access: Constraining Interference Based on Experimental Models
IEEE Journal on Selected Areas in Communications
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In cognitive radio (CR) networks, the coexistence between neighboring secondary networks is referred to as self coexistence. As prescribed in IEEE 802.22, a self-coexistence protocol enables a CR network in need of more spectrum resources to acquire spectrum (channels) from neighboring CR networks via a distributed inter-network spectrum contention process. A network that forfeits part of its spectrum in a spectrum contention process may later become short of spectrum, and in turn, it initiates a cascading spectrum contention process to acquire more spectrum resources. As a result, a local spectrum contention may trigger a series of successive contention instances that proliferate over the whole network, which may waste the network resources. In this paper, we systematically study the cascading spectrum contention problem using a percolation-based model in the context of CR networks. We show that cascading spectrum contentions under existing spectrum contention resolution rules is equivalent to a site percolation process that can readily lead to a network-wide cascade. To address such a problem, we identify the critical conditions for determining the occurrence of cascading spectrum contentions, and propose a biased spectrum contention protocol that intentionally lowers the probability that a starving network can trigger successive spectrum contentions. We show that the proposed solution can effectively restrict the spatial cascading impact of contentions.