Cross-Layer Combining of Adaptive Modulation and Truncated ARQ Under Cognitive Radio Resource Requirements

In addressing the issue of taking full advantage of the shared spectrum under imposed limitations in a cognitive radio (CR) network, we exploit a cross-layer design for the communications of secondary users (SUs), which combines adaptive modulation and coding (AMC) at the physical layer with truncat...

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Veröffentlicht in:IEEE transactions on vehicular technology Jg. 61; H. 9; S. 4020 - 4030
Hauptverfasser: Yuli Yang, Hao Ma, Aissa, S.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York, NY IEEE 01.11.2012
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Adaptive modulation and coding (AMC)
Applied sciences
Automatic repeat request
automatic repeat request (ARQ)
Channels
Coding, codes
Cognitive radio
cognitive radio (CR)
Communication channels
cross-layer design
Exact sciences and technology
Fading
Information, signal and communications theory
Joints
Links
Modulation
Modulation, demodulation
Networks
packet error rate (PER)
packet loss probability (PLP)
Packet transmission
Physical layer
Probability density function
Probability density functions
Radiocommunication specific techniques
Radiocommunications
Signal and communications theory
Signal to noise ratio
spectral efficiency (SE)
spectrum sharing
Strontium
Studies
Switching and signalling
Switching theory
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmitter
Data transmission
cognitive radio (CR)
packet loss probability (PLP)
Packet error rate
Power allocation
Time variation
Addressing
packet error rate (PER)
Linear prediction
Optimal allocation
cross-layer design
Cross-layer approach
spectral efficiency (SE)
Probability density function
Adaptive modulation
Data link
Modulation coding
spectrum sharing
Packet switching
Resource sharing
Adaptive coding
Statistical method
High efficiency
Adaptive modulation and coding (AMC)
Transmission mode
Transmission loss
automatic repeat request (ARQ)
Automatic repeat request
Radio communication
Software radio
Signal to noise ratio
ISSN:0018-9545, 1939-9359
Online-Zugang:Volltext
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Beschreibung
Zusammenfassung:In addressing the issue of taking full advantage of the shared spectrum under imposed limitations in a cognitive radio (CR) network, we exploit a cross-layer design for the communications of secondary users (SUs), which combines adaptive modulation and coding (AMC) at the physical layer with truncated automatic repeat request (ARQ) protocol at the data link layer. To achieve high spectral efficiency (SE) while maintaining a target packet loss probability (PLP), switching among different transmission modes is performed to match the time-varying propagation conditions pertaining to the secondary link. Herein, by minimizing the SU's packet error rate (PER) with each transmission mode subject to the spectrum-sharing constraints, we obtain the optimal power allocation at the secondary transmitter (ST) and then derive the probability density function (pdf) of the received SNR at the secondary receiver (SR). Based on these statistics, the SU's packet loss rate and average SE are obtained in closed form, considering transmissions over block-fading channels with different distributions. Our results quantify the relation between the performance of a secondary link exploiting the cross-layer-designed adaptive transmission and the interference inflicted on the primary user (PU) in CR networks.
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ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2012.2214410