QoS-driven energy-efficient power adaptation in a multi-channel fading communication link

Khakurel, Suman and Le-Ngoc, Tho and Musavian, Leila (2013) QoS-driven energy-efficient power adaptation in a multi-channel fading communication link. In: Global Communications Conference (GLOBECOM), 2013 IEEE. IEEE, USA, pp. 4038-4043.

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In this paper, we maximize the parameterized energy efficiency (EEP) of a multi-channel fading communication link that simultaneously transmits data corresponding to delay-sensitive and delay-insensitive applications subject to a constraint on the minimum effective capacity (EC) of delay-sensitive traffic. EEP, in b/s/Hz, is defined as the difference between the spectral efficiency (SE) and the transmit power scaled by a parameter which represents the penalty on the transmit power. We provide an optimal power adaptation policy to this problem which is either given by the global optimum, if feasible, or given by the boundary point where the objective function intersects the constraint. Further, we apportion the total transmit power into delay-sensitive power, which is the minimum power required to meet the EC constraint and delay-insensitive power, which is the residual power used to maximize the EEP of the link. Simulation results show that delay-sensitive power is an exponentially increasing function of minimum EC while delay-insensitive power decays to zero for higher values of minimum EC. Further, delay-insensitive power increases while delay-sensitive power exponentially decreases with number of subchannels in the system.

Item Type: Contribution in Book/Report/Proceedings
Departments: Faculty of Science and Technology > School of Computing & Communications
ID Code: 70189
Deposited By: ep_importer_pure
Deposited On: 05 Aug 2014 10:00
Refereed?: Yes
Published?: Published
Last Modified: 07 Jan 2020 03:24
URI: https://eprints.lancs.ac.uk/id/eprint/70189

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