Pragmatic Distributed Algorithm for Spectral Access in Cooperative Cognitive Radio Networks

A pragmatic distributed algorithm (PDA) is proposed for supporting the efficient spectral access of multiple Primary Users (PUs) and Cognitive Users (CUs) in cooperative Cognitive Radio (CR) networks. The novelty of our PDA is that the PUs negotiate with the CUs concerning the specific amount of rel...

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Bibliographic Details
Published in:IEEE transactions on communications Vol. 62; no. 4; pp. 1188 - 1200
Main Authors: Wei Liang, Soon Xin Ng, Jiao Feng, Hanzo, Lajos
Format: Journal Article
Language:English
Published: New York, NY IEEE 01.04.2014
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Algorithms
Applied sciences
ATTCM
Codes
Coding, codes
Cognitive radio
Cognitive radio network
Cooperative communication
Distributed algorithms
Encoding
Exact sciences and technology
Information, signal and communications theory
matching algorithm
Modulation
Networks
PDA
Plutonium
Radiocommunication specific techniques
Radiocommunications
Relaying
Resource management
Signal and communications theory
Spectra
spectrum access strategy
Spread spectrum management
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Personal digital assistant
Relaying
spectrum access strategy
Relay
Cooperative systems
Cognitive radio network
Turbo code
Transmission time
cooperative communication
ATTCM
matching algorithm
Coding
Distributed algorithm
Trellis coded modulation
Transmission rate
Radio communication
Software radio
ISSN:0090-6778, 1558-0857
Online Access:Get full text
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Summary:A pragmatic distributed algorithm (PDA) is proposed for supporting the efficient spectral access of multiple Primary Users (PUs) and Cognitive Users (CUs) in cooperative Cognitive Radio (CR) networks. The novelty of our PDA is that the PUs negotiate with the CUs concerning the specific amount of relaying and transmission time, the CU is granted, which the CU will either accept or decline. The CUs may serve as relay nodes for relaying the signal received from the PUs to their destinations, while both the PUs' and the CUs' minimum rate requirements are satisfied. This will reduce the required transmission power and/or increase the transmission rate of the PU. Our results show that the proposed scheme performs better than the benchmarker, despite its significantly lower overhead and complexity. Moreover, we show that the cooperative spectral access based on our PDA reaches an equilibrium, when it is repeated for a sufficiently long duration. These benefits are achieved, because the PUs are motivated to cooperate by the incentive of achieving a higher PU rate, whilst non-cooperation can be discouraged with the aid of a limited-duration punishment. Furthermore, we invoke an attractive practical adaptive Turbo Trellis Coded Modulation (ATTCM) scheme, which appropriately adjusts the code rate and the modulation mode according to the near-instantaneous channel conditions. It was found that the joint design of coding, modulation and user-cooperation may lead to significant mutual benefits for all the PUs and the CUs.
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ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2014.030214.130326