Best relay selection for underlay cognitive radio systems with collision probability minimization

Yahya H. Ezzeldin; Ahmed Sultan; Moustafa Youssef

doi:10.1109/ICCNC.2014.6785464

Best relay selection for underlay cognitive radio systems with collision probability minimization

Yahya H. Ezzeldin, Ahmed Sultan, Moustafa Youssef

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

6 Scopus citations

Abstract

We consider an underlay relay-assisted two-hop cognitive link which employs best relay selection to enhance the performance of secondary transmissions while keeping the interference at the primary receiver below a specified level. Best relay selection is implemented using countdown timers without cooperation between the relays. Assuming channel knowledge at the relays, the best relay is determined by the maximum signal-to-noise ratio (SNR) at the secondary receiver. Due to the timer-based operation, collisions may occur and the timer design is optimized to minimize the collision probability. The performances of the amplify-and-forward and decode-and-forward modes of operation are compared. Closed form expressions for the secondary outage probability are derived for both schemes. Numerical results provide insight into the system operation and how the outage probability depends on the various system parameters. © 2014 IEEE.

Original language	English (US)
Title of host publication	2014 International Conference on Computing, Networking and Communications, ICNC 2014
Publisher	IEEE Computer Society
Pages	945-949
Number of pages	5
DOIs	https://doi.org/10.1109/ICCNC.2014.6785464
State	Published - Jan 1 2014
Externally published	Yes

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10.1109/ICCNC.2014.6785464

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title = "Best relay selection for underlay cognitive radio systems with collision probability minimization",

abstract = "We consider an underlay relay-assisted two-hop cognitive link which employs best relay selection to enhance the performance of secondary transmissions while keeping the interference at the primary receiver below a specified level. Best relay selection is implemented using countdown timers without cooperation between the relays. Assuming channel knowledge at the relays, the best relay is determined by the maximum signal-to-noise ratio (SNR) at the secondary receiver. Due to the timer-based operation, collisions may occur and the timer design is optimized to minimize the collision probability. The performances of the amplify-and-forward and decode-and-forward modes of operation are compared. Closed form expressions for the secondary outage probability are derived for both schemes. Numerical results provide insight into the system operation and how the outage probability depends on the various system parameters. {\textcopyright} 2014 IEEE.",

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doi = "10.1109/ICCNC.2014.6785464",

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Best relay selection for underlay cognitive radio systems with collision probability minimization. / Ezzeldin, Yahya H.; Sultan, Ahmed; Youssef, Moustafa.
2014 International Conference on Computing, Networking and Communications, ICNC 2014. IEEE Computer Society, 2014. p. 945-949.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AU - Youssef, Moustafa

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PY - 2014/1/1

Y1 - 2014/1/1

N2 - We consider an underlay relay-assisted two-hop cognitive link which employs best relay selection to enhance the performance of secondary transmissions while keeping the interference at the primary receiver below a specified level. Best relay selection is implemented using countdown timers without cooperation between the relays. Assuming channel knowledge at the relays, the best relay is determined by the maximum signal-to-noise ratio (SNR) at the secondary receiver. Due to the timer-based operation, collisions may occur and the timer design is optimized to minimize the collision probability. The performances of the amplify-and-forward and decode-and-forward modes of operation are compared. Closed form expressions for the secondary outage probability are derived for both schemes. Numerical results provide insight into the system operation and how the outage probability depends on the various system parameters. © 2014 IEEE.

AB - We consider an underlay relay-assisted two-hop cognitive link which employs best relay selection to enhance the performance of secondary transmissions while keeping the interference at the primary receiver below a specified level. Best relay selection is implemented using countdown timers without cooperation between the relays. Assuming channel knowledge at the relays, the best relay is determined by the maximum signal-to-noise ratio (SNR) at the secondary receiver. Due to the timer-based operation, collisions may occur and the timer design is optimized to minimize the collision probability. The performances of the amplify-and-forward and decode-and-forward modes of operation are compared. Closed form expressions for the secondary outage probability are derived for both schemes. Numerical results provide insight into the system operation and how the outage probability depends on the various system parameters. © 2014 IEEE.

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BT - 2014 International Conference on Computing, Networking and Communications, ICNC 2014

PB - IEEE Computer Society

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Best relay selection for underlay cognitive radio systems with collision probability minimization

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