Design and performance analysis of an energy-efficient uplink carrier aggregation scheme

Liu, Fei and Zheng, Kan and Xiang, Wei and Zhao, Hui (2014) Design and performance analysis of an energy-efficient uplink carrier aggregation scheme. IEEE Journal on Selected Areas in Communications, 32 (2). pp. 197-207. ISSN 0733-8716

Abstract

Energy efficiency is of vital importance for telecommunications equipment in future networks, especially battery-constrained mobile devices. In the long term evolution-Advanced (LTE-Advanced) network, the carrier aggregation (CA) technique is employed to allow user equipment (UE) to use multiple carriers for high data rate communications. However, multi-carrier transmission entails increased power consumption at user devices in uplink networks. In this paper, we propose a new dynamic carrier aggregation (DCA) scheduling scheme to improve the energy efficiency of uplink communications. Two scheduling methods, i.e., serving the longest queue (SLQ) and round-robin with priority (RRP), are designed to reduce transmit power while maximizing the utilization of wireless resources. The proposed scheme is analyzed in terms of both the data rate and energy conservation. We build an ideally balanced system (IBS) to investigate the performance upper bound of the DCA scheme, and derive closed-form expressions. Simulation results demonstrate that the proposed scheme can not only enhance the energy efficiency but also perform closely to the optimal IBS.


Statistics for USQ ePrint 27219
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2014 IEEE. Permanent restricted access to published version due to publisher copyright policy.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 12 May 2015 01:21
Last Modified: 13 May 2015 23:06
Uncontrolled Keywords: carrier aggregation; carrier scheduling; energy efficiency; LTE-advanced
Fields of Research : 10 Technology > 1005 Communications Technologies > 100504 Data Communications
10 Technology > 1005 Communications Technologies > 100503 Computer Communications Networks
10 Technology > 1006 Computer Hardware > 100605 Performance Evaluation; Testing and Simulation of Reliability
Socio-Economic Objective: B Economic Development > 89 Information and Communication Services > 8998 Environmentally Sustainable Information and Communication Services > 899899 Environmentally Sustainable Information and Communication Services not elsewhere classified
Identification Number or DOI: 10.1109/JSAC.2014.141202
URI: http://eprints.usq.edu.au/id/eprint/27219

Actions (login required)

View Item Archive Repository Staff Only