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Mobile Information Systems
Volume 2016, Article ID 8981251, 16 pages
http://dx.doi.org/10.1155/2016/8981251
Research Article

Energy-Efficient Transmission Strategy by Using Optimal Stopping Approach for Mobile Networks

1College of Electrical Engineering, Guangxi University, Nanning 530004, China
2School of Computer and Electronic Information, Guangxi University, Nanning 530004, China

Received 18 September 2015; Revised 15 January 2016; Accepted 16 February 2016

Academic Editor: Qi Wang

Copyright © 2016 Ying Peng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In mobile networks, transmission energy consumption dominates the major part of network energy consumption. To reduce energy consumption for data transmission is an important topic for constructing green mobile networks. According to Shannon formula, when the transmission power is constant, the better the channel quality is, the greater the transmission rate is. Then, more data will be delivered in a given period. And energy consumption per bit data transmitted will be reduced. Because channel quality varies with time randomly, it is a good opportunity for decreasing energy consumption to deliver data in the best channel quality. However, data has delay demand. The sending terminal cannot wait for the best channel quality unlimitedly. Actually, sending terminal has to select an optimal time to deliver data before data exceeds delay. For this, this paper obtains the optimal transmission rate threshold at each detection slot time by using optimal stopping approach. Then, sending terminal determines whether current time is the optimal time through comparing current transmission rate with the corresponding rate threshold, thus realizing energy-efficient transmission strategy, so as to decrease average energy consumption per bit data transmitted.