Paper Info
Title
Spectrum sharing in cognitive radio networks with imperfect sensing: A discrete-time Markov model
Abstract
An efficient and utmost utilization of currently scarce and underutilized radio spectrum resources has stimulated the introduction of what has been coined Cognitive Radio (CR) access methodologies and implementations. While the long-established approach has been based on licensed (or primary) spectrum access, this new communication paradigm enables an opportunistic secondary access to shared spectrum resources provided mutual interference is kept below acceptable levels. In this paper we address the problem of primary-secondary spectrum sharing in cognitive radio access networks using a framework based on a Discrete Time Markov Chain (DTMC) model. Its applicability and advantages with respect to other approaches is explained and further justified. Spectrum awareness of primary activity by the secondary users is based on spectrum sensing techniques, which are modeled in order to capture sensing errors in the form of false-alarm and missed-detection. Model validation is successfully achieved by means of a system-level simulator which is able to capture the system behavior with high degree of accuracy. Parameter dependencies and potential tradeoffs are identified enabling an enhanced operation for both primary and secondary users. The suitability of the specified model is justified while allowing a wide range of extended implementations and enhanced capabilities to be considered.
Year
DOI
Venue
2010
10.1016/j.comnet.2010.04.005
Computer Networks
Keywords
DocType
Volume
Mobile communication systems,Cognitive radio networks,Markov processes,Queuing theory,Model validation and analysis
Journal
54
Issue
ISSN
Citations 
14
Computer Networks
32
PageRank 
References 
Authors
1.25
11
4
Name
Order
Citations
PageRank
Xavier Gelabert11679.84
Oriol Sallent265986.31
Jordi Pérez-romero367980.46
Ramon Agustí420013.33