Title: Impartial spectrum decision under interference temperature model in cognitive wireless mesh networks
Authors: Yun Yang; Guo-an Zhang; Yan-cheng Ji
Addresses: School of Electronics and Information, Nantong University, No.9 Seyuan Road, 226019 Nantong, Jiangsu, China ' School of Electronics and Information, Nantong University, No.9 Seyuan Road, 226019 Nantong, Jiangsu, China ' School of Electronics and Information, Nantong University, No.9 Seyuan Road, 226019 Nantong, Jiangsu, China
Abstract: Interference temperature model was proposed to relieve the problem of spectrum scarcity and spectrum underutilisation in the licensed bands by allowing simultaneous communication between licensees and cognitive unlicensed users in underlay spectrum sharing mode. Under interference temperature limits, a new metric called outage probability was proposed for the spectrum handoff decision in cognitive wireless mesh networks, to increase the spectrum efficiency and decrease the handoff latency. Furthermore, according to the pre-emptive resume priority (PRP) M/G/1 queuing theory, the handoff decision policy was applied to the probability-based spectrum decision strategy. Simulation results show that the proposed decision scheme reduces the outage probability and overall transmission time of secondary users, simultaneously guarantees the fairness in the channel utilisation, and further improves the network performance.
Keywords: cognitive radio; wireless mesh networks; WMNs; spectrum decision; spectrum handoff; interference temperature; spectrum scarcity; spectrum underutilisation; outage probability; spectrum efficiency; handoff latency; fairness; network performance.
International Journal of Embedded Systems, 2013 Vol.5 No.3, pp.134 - 141
Received: 20 Nov 2012
Accepted: 26 May 2013
Published online: 09 Oct 2013 *