ZAP: Um Algoritmo de Atribuição Distribuída de Canais para Mitigação de Interferências em Redes com Rádio Cognitivo

Paulo R. Walenga Jr.Mauro FonsecaAnelise MunarettoAline Carneiro VianaArtur Ziviani

This paper presents ZAP, a protocol for distributed assignment of frequency channelsto links in cognitive radio networks. These radios are capable of identifying under-utilizedlicensed bands of the spectrum, allowing their reuse without interfering with primary users.The frequency assignment must be simple, incur acceptable communication overhead, providetimely response and be adaptive to accommodate constant changes in the network. Anotherchallenge is the optimization of network capacity through interference minimization. Unlike therelated proposals in the literature, ZAP responds to this challenge with a distributed approachbased only on local (neighborhood) knowledge, while significantly reducing computational costand number of messages required for channel assignment. Simulations confirm the good qualityof ZAP in terms of (1) performance compromise between different metrics and (2) fast solutionachievement regardless of network size.

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