Network switching strategy for energy conservation in heterogeneous networks SCIE SCOPUS

Cited 1 time in WEB OF SCIENCE Cited 1 time in Scopus
Title
Network switching strategy for energy conservation in heterogeneous networks
Author(s)
Song, Yujae; Choi, Wooyeol; Baek, Seungjae
KIOST Author(s)
Song, Yu Jae(송유재)Baek, Seung Jae(백승재)
Publication Year
2017-02-27
Abstract
In heterogeneous networks (HetNets), the large-scale deployment of small base stations (BSs) together with traditional macro BSs is an economical and efficient solution that is employed to address the exponential growth in mobile data traffic. In dense HetNets, network switching, i.e., handovers, plays a critical role in connecting a mobile terminal (MT) to the best of all accessible networks. In the existing literature, a handover decision is made using various handover metrics such as the signal-to-noise ratio, data rate, and movement speed. However, there are few studies on handovers that focus on energy efficiency in HetNets. In this paper, we propose a handover strategy that helps to minimize energy consumption at BSs in HetNets without compromising the quality of service (QoS) of each MT. The proposed handover strategy aims to capture the effect of the stochastic behavior of handover parameters and the expected energy consumption due to handover execution when making a handover decision. To identify the validity of the proposed handover strategy, we formulate a handover problem as a constrained Markov decision process (CMDP), by which the effects of the stochastic behaviors of handover parameters and consequential handover energy consumption can be accurately reflected when making a handover decision. In the CMDP, the aim is to minimize the energy consumption to service an MT over the lifetime of its connection, and the constraint is to guarantee the QoS requirements of the MT given in terms of the transmission delay and call-dropping probability. We find an optimal policy for the CMDP using a combination of the Lagrangian method and value iteration. Simulation results verify the validity of the proposed handover strategy.
ISSN
1932-6203
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1285
DOI
10.1371/journal.pone.0172318
Bibliographic Citation
PLOS ONE, v.12, no.2, 2017
Publisher
PUBLIC LIBRARY SCIENCE
Subject
HANDOFF DECISION ALGORITHM; WIRELESS
Type
Article
Language
English
Document Type
Article
Publisher
PUBLIC LIBRARY SCIENCE
Related Researcher
Research Interests

Computer System,System Software,Storage System,컴퓨터 시스템,시스템 소프트웨어,스토리지 시스템

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