Abstract

HERNANDEZ, César; PAEZ, Ingrid  and  GIRAL, Diego. AHP-VIKOR Model for Spectrum Handoff in Cognitive Radio Networks. Tecnura [online]. 2015, vol.19, n.45, pp.29-39. ISSN 0123-921X.  https://doi.org/10.14483/udistrital.jour.tecnura.2015.3.a02.

This paper proposed a hybrid algorithm for spectrum allocation in cognitive radio networks based on two algorithms, analytical hierarchical process (AHP) and multi-criteria optimization and compromise solution (VIKOR), for improving the performance of mobility spectrum of secondary users in cognitive radio networks.To evalúate the level of performance of the proposed algorithm, a comparative analysis between the proposed AHP-VIKOR, Grey Relational Analysis (GRA) and a random allocation of spectrum (Random) algorithm, is performed. The first two algorithms work with the same decision criteria: probability of channel availability, estimated time availability, signalto-interference-plus-noise ratio and bandwidth. Unlike related work, benchmarking was validated through a trace of real spectral occupation data, captured in the GSM frequency band, which models the actual behavior of licensed users. For performance evaluation five metric were used, handoff failed average cumulative number, handoff average cumulative number, average bandwidth, delay and average cumulative throughput. The results of the comparative analysis with the other two algorithms show that the AHP-VIKOR algorithm proposed provides the best performance in spectral mobility.

Keywords : spectral handoff; hybrid model; cognitive radio; mobile networks.

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