Year: 2013
Type: article
Abstract: Cognitive rad io is a technology initiated by many research organizations and academic institutions to raise the spectrum utilization of underutilized channels in order to alleviate spectrum scarcity problem to a larger extent.Spectru m handoff is in itiated due to appearance of primary user (PU) on the channels occupied by the secondary user (SU) at that time and location or interference to the PU exceeds the certain threshold.In this paper, we propose a novel spectrum handoff algorith m using fuzzy logic based approach that does two important functions: 1) adjusts transmission power of SU intelligently in order to avoid handoff by reducing harmful interference to PUs and 2) takes handoff decisions intelligently in the light of new parameter such as expected holding t ime (HT) of the channel as one of its antecedent.Simu lated results show impact analysis of selection of the channel in the light of HT information and the co mparison with random selection algorith m demonstrates that there is considerable reduction in handoff rate of SU.
Authors: Nisar A. Lala, Moin Uddin, N.A. Sheikh
Language: English
Subfield: Computer Networks and Communications
Field: Computer Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2103201956