Paper Info
Title
Interference-aware spectrum handover for cognitive radio networks.
Abstract
Cognitive radio (CR) is a promising technique for future wireless networks, which significantly improves spectrum utilization. In CR networks, when the primary users (PUs) appear, the secondary users (SUs) have to switch to other available channels to avoid the interference to PUs. However, in the multi-SU scenario, it is still a challenging problem to make an optimal decision on spectrum handover because of the the accumulated interference constraint of PUs and SUs. In this paper, we propose an interference-aware spectrum handover scheme that aims to maximize the CR network capacity and minimize the spectrum handover overhead by coordinating SUs' handover decision optimally in the PU-SU coexisted CR networks. On the basis of the interference temperature model, the spectrum handover problem is formulated as a constrained optimization problem, which is in general a non-deterministic polynomial-time hard problem. To address the problem in a feasible way, we design a heuristic algorithm by using the technique of Branch and Bound. Finally, we combine our spectrum handover scheme with power control and give a convenient solution in a single-SU scenario. Experimental results show that our algorithm can improve the network performance efficiently. Copyright (C) 2012 John Wiley & Sons, Ltd.
Year
DOI
Venue
2014
10.1002/wcm.2273
WIRELESS COMMUNICATIONS & MOBILE COMPUTING
Keywords
DocType
Volume
interference temperature,spectrum handover,power control
Journal
14.0
Issue
ISSN
Citations 
11.0
1530-8669
2
PageRank 
References 
Authors
0.36
3
4
Name
Order
Citations
PageRank
Dianjie Lu120.36
Xiaoxia Huang232919.15
Weile Zhang320.70
Jianping Fan 0002430.71