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• W1987729253 abstract "Cognitive radios (CR) have the ability to dynamically adapt to local spectrum availability. In a network comprised of CR-enabled devices, layer-2 auto-configuration involves determining a common set of channels to facilitate communication among participating nodes. This is a unique challenge as nodes in the CR network may be unaware of (a) their neighbors and (b) the channels on which they can communicate with a neighbor. In this paper, we propose a time-efficient distributed algorithm for layer-2 auto-configuration for a CR network. Our algorithm finds the globally common channel set in 2MN+O(DN) timeslots, where each node is assigned a unique identifier from the range [1,…,N], M is the maximum number of channels available for communication, and D is the diameter of the network. All nodes know M and N. We present both diameter-aware and diameter-unaware versions of the algorithm. We then show that the proposed algorithms are efficient by proving a matching lower bound. Finally, we investigate a special case when nodes have more knowledge available at their disposal and discuss how the time-complexity of our algorithm can be improved under this case." @default.
• W1987729253 created "2016-06-24" @default.
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• W1987729253 date "2008-03-01" @default.
• W1987729253 modified "2023-09-26" @default.
• W1987729253 title "Time-efficient distributed layer-2 auto-configuration for cognitive radio networks" @default.
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• W1987729253 doi "https://doi.org/10.1016/j.comnet.2007.11.013" @default.
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