Title

Optimizing Spectrum-Energy Efficiency in Downlink Cellular Networks

Authors

Authors

C. C. Hsu; J. M. Chang; Z. T. Chou;Z. Abichar

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

IEEE. Trans. Mob. Comput.

Keywords

Network optimization; energy saving; spectrum efficiency; revenue-cost; ratio; ACCESS; Computer Science, Information Systems; Telecommunications

Abstract

The popularity of smart mobile devices has brought significant growth of data services for mobile service providers. Mobile users of data services are charged based on the amount of data used. Raising served data amount seemingly increases the profit; energy consumption rises correspondingly. Besides, spectral resources are licensed and limited for mobile operators to allocate. Increasing data services over the spectrum for the profit does not count the cost of energy. To assess the profitability, considered is the revenue-to-cost ratio. Optimizing the ratio is an economic incentive for mobile operators. Revenue is regarded as efficiency in spectrum use, the cost as energy consumption; therefore we interpret the revenue-to-cost ratio as spectrum-energy efficiency. In this paper, we study the spectrum-energy efficiency optimization problem where BSs are with the ability to perform cell zooming, sleep mode, and user migration. We formulate the problem into an integer linear program which is solvable by CPLEX to maximize spectrum-energy efficiency; meanwhile traffic demands by associated users in multicell/multiuser networks are met. To avoid high computation time, a heuristic algorithm is proposed to efficiently solve the formulated problem. Numerical analysis through case studies demonstrates energy consumption and efficiency improvements, and comparisons between near-optimal solutions against optimality.

Journal Title

Ieee Transactions on Mobile Computing

Volume

13

Issue/Number

9

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

2100

Last Page

2112

WOS Identifier

WOS:000342162100015

ISSN

1536-1233

Share

COinS