Throughput and Energy Efficiency Maximization for Cognitive Relay System

You XU; Yunzhou LI; Ming ZHAO; Hongxing ZOU

doi:10.1587/transcom.E95.B.226

Throughput and Energy Efficiency Maximization for Cognitive Relay System

You XU, Yunzhou LI, Ming ZHAO, Hongxing ZOU

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Cognitive radio technology, which allows secondary user (SU) to utilize the spectrum holes left by primary user (PU), was proposed to solve spectrum under-utilization problem. However, due to sensing error, SU's transmission will bring negative effects to PU's communication. Recently, cooperative relay technology was introduced to solve this problem. In this paper, a cooperative framework, which allows SU to act as a relay for primary link when needed, is considered and then a cognitive relay scheme is proposed. In order to maximize SU's throughput while keeping the system stable, we study and obtain SU's optimal strategy (i.e., relaying strategy and power allocation) by a constrained optimization problem. Since energy consumption is also an important problem for cognitive radio networks, we also investigate SU's optimal strategy to maximize SU's energy efficiency while keeping the system stable. The numerical results show that the cognitive relay scheme can achieve higher throughput and energy efficiency than reference schemes.

Publication: IEICE TRANSACTIONS on Communications Vol.E95-B No.1 pp.226-233

Publication Date: 2012/01/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1587/transcom.E95.B.226

Type of Manuscript: PAPER

Category: Terrestrial Wireless Communication/Broadcasting Technologies

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You XU, Yunzhou LI, Ming ZHAO, Hongxing ZOU, "Throughput and Energy Efficiency Maximization for Cognitive Relay System" in IEICE TRANSACTIONS on Communications, vol. E95-B, no. 1, pp. 226-233, January 2012, doi: 10.1587/transcom.E95.B.226.
Abstract: Cognitive radio technology, which allows secondary user (SU) to utilize the spectrum holes left by primary user (PU), was proposed to solve spectrum under-utilization problem. However, due to sensing error, SU's transmission will bring negative effects to PU's communication. Recently, cooperative relay technology was introduced to solve this problem. In this paper, a cooperative framework, which allows SU to act as a relay for primary link when needed, is considered and then a cognitive relay scheme is proposed. In order to maximize SU's throughput while keeping the system stable, we study and obtain SU's optimal strategy (i.e., relaying strategy and power allocation) by a constrained optimization problem. Since energy consumption is also an important problem for cognitive radio networks, we also investigate SU's optimal strategy to maximize SU's energy efficiency while keeping the system stable. The numerical results show that the cognitive relay scheme can achieve higher throughput and energy efficiency than reference schemes.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/transcom.E95.B.226/_p

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@ARTICLE{e95-b_1_226,
author={You XU, Yunzhou LI, Ming ZHAO, Hongxing ZOU, },
journal={IEICE TRANSACTIONS on Communications},
title={Throughput and Energy Efficiency Maximization for Cognitive Relay System},
year={2012},
volume={E95-B},
number={1},
pages={226-233},
abstract={Cognitive radio technology, which allows secondary user (SU) to utilize the spectrum holes left by primary user (PU), was proposed to solve spectrum under-utilization problem. However, due to sensing error, SU's transmission will bring negative effects to PU's communication. Recently, cooperative relay technology was introduced to solve this problem. In this paper, a cooperative framework, which allows SU to act as a relay for primary link when needed, is considered and then a cognitive relay scheme is proposed. In order to maximize SU's throughput while keeping the system stable, we study and obtain SU's optimal strategy (i.e., relaying strategy and power allocation) by a constrained optimization problem. Since energy consumption is also an important problem for cognitive radio networks, we also investigate SU's optimal strategy to maximize SU's energy efficiency while keeping the system stable. The numerical results show that the cognitive relay scheme can achieve higher throughput and energy efficiency than reference schemes.},
keywords={},
doi={10.1587/transcom.E95.B.226},
ISSN={1745-1345},
month={January},}

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TY - JOUR
TI - Throughput and Energy Efficiency Maximization for Cognitive Relay System
T2 - IEICE TRANSACTIONS on Communications
SP - 226
EP - 233
AU - You XU
AU - Yunzhou LI
AU - Ming ZHAO
AU - Hongxing ZOU
PY - 2012
DO - 10.1587/transcom.E95.B.226
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E95-B
IS - 1
JA - IEICE TRANSACTIONS on Communications
Y1 - January 2012
AB - Cognitive radio technology, which allows secondary user (SU) to utilize the spectrum holes left by primary user (PU), was proposed to solve spectrum under-utilization problem. However, due to sensing error, SU's transmission will bring negative effects to PU's communication. Recently, cooperative relay technology was introduced to solve this problem. In this paper, a cooperative framework, which allows SU to act as a relay for primary link when needed, is considered and then a cognitive relay scheme is proposed. In order to maximize SU's throughput while keeping the system stable, we study and obtain SU's optimal strategy (i.e., relaying strategy and power allocation) by a constrained optimization problem. Since energy consumption is also an important problem for cognitive radio networks, we also investigate SU's optimal strategy to maximize SU's energy efficiency while keeping the system stable. The numerical results show that the cognitive relay scheme can achieve higher throughput and energy efficiency than reference schemes.
ER -