Paper Info
Title
Dynamic Resource Allocation For Cognitive Ofdma Networks Based On "Two Witnesses Rule" For Cooperative Spectrum Sensing
Abstract
In this paper, we propose a resource allocation scheme that maximizes the total throughput of the cognitive OFDMA system while avoiding the generation of harmful interferences to the primary users. The proposed approach is based on an imperfect knowledge of the spectrum availability. All secondary users listen to spectrum during a short period of time and apply censored energy detection, in order to reduce the overhead and ensure better credibility on the transmitted decision. As in wedding, we adopted the two witnesses rule for the cooperative spectrum sensing. Using this new rule, we established a confidence level for occupancy of each sub-carrier of the OFDMA system, which will be used to adjust the transmitted power of the secondary user and hence increase the real achievable throughput of the system. Simulations were drawn in order to evaluate the accuracy of the new data fusion approach and the performance of the proposed resource allocation algorithm.
Year
DOI
Venue
2011
10.1109/PIMRC.2011.6139982
2011 IEEE 22ND INTERNATIONAL SYMPOSIUM ON PERSONAL INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC)
Keywords
Field
DocType
Cognitive radio, OFDMA system, Imperfect spectrum sensing, resource allocation, service differentiation
Resource management,Subcarrier,Computer science,Computer network,Sensor fusion,Resource allocation,Throughput,Frequency-division multiple access,Orthogonal frequency-division multiplexing,Cognitive radio
Conference
Citations 
PageRank 
References 
1
0.40
7
Authors
2
Name
Order
Citations
PageRank
Rahma Bouraoui131.47
Hichem Besbes28022.41