DocumentCode :
1249119
Title :
Toward efficient radio spectrum utilization: user cooperation in cognitive radio networking
Author :
Cao, Bin ; Zhang, Qinyu ; Mark, Jon W. ; Cai, Lin X. ; Poor, H. Vincent
Volume :
26
Issue :
4
fYear :
2012
Firstpage :
46
Lastpage :
52
Abstract :
In a cooperative cognitive radio network, secondary users are able to negotiate with primary users for dedicated transmission opportunities through providing tangible service. Two novel and simple user cooperation frameworks are introduced to improve the spectral efficiency and utilization. To this end, an orthogonal signaling-based cooperation technology for leveraging the degrees of freedom in two-dimensional modulation is discussed. In the proposed framework, anSU is enabled to simultaneously transmit its own data and relay another user´s packets in two orthogonal channels. Specifically, in the framework of user cooperation between PUs and SUs, a cross-layer design for cooperative communications between an active PU and an SU is first investigated. In the framework of cooperative spectrum leasing by a group of SUs, a cross-layer design for cooperation among SUs is then presented. Cooperation performance in terms of a weighed sum throughput maximization under certain power and throughput constraints is evaluated and analyzed in both frameworks via simulations.
Keywords :
cognitive radio; cooperative communication; modulation; optimisation; radio spectrum management; cooperative cognitive radio network; cooperative communication; cooperative spectrum; cross-layer design; orthogonal signaling-based cooperation technology; power constraint; radio spectrum utilization; spectral efficiency; spectral utilization; throughput constraint; two-dimensional modulation; user cooperation; weighed sum throughput maximization; Cognitive radio; Context; Interference; Modulation; Relays; Scattering; Throughput;
fLanguage :
English
Journal_Title :
Network, IEEE
Publisher :
ieee
ISSN :
0890-8044
Type :
jour
DOI :
10.1109/MNET.2012.6246752
Filename :
6246752
Link To Document :
بازگشت