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Author: search.filters.author.Kobayashi, HideoSubject: search.filters.subject.Sleep control

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    Cell throughput based sleep control scheme for heterogeneous cellular networks
    (2018-05-01)
    Phaiwitthayaphorn, Prapassorn
    ;
    Mori, Kazuo
    ;
    Kobayashi, Hideo
    ;
    Boonsrimuang, Pisit
    The mobile traffic continuously grows at a rapid rate driven by the widespread use of wireless devices. Along with that, the demands for higher data rate and better coverage lead to increase in power consumption and operating cost of network infrastructure. The concept of heterogeneous networks (Het-Nets) has been proposed as a promising approach to provide higher coverage and capacity for cellular networks. HetNet is an advanced network consisting of multiple kinds of base stations, i.e., macro base station (MBS), and small base station (SBS). The overlay of many SBSs into the MBS coverage can provide higher network capacity and better coverage in cellular networks. However, the dense deployment of SBSs would cause an increase in the power consumption, leading to a decrease in the energy efficiency in downlink cellular networks. Another technique to improve energy efficiency while reducing power consumption in the network is to introduce sleep control for SBSs. This paper proposes cell throughput based sleep control which the cell capacity ratio for the SBSs is employed as decision criteria to put the SBSs into a sleep state. The simulation results for downlink communications demonstrate that the proposed scheme improves the energy efficiency, compared with the conventional scheme.
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    Cell throughput based sleep control scheme for heterogeneous cellular networks
    (2017-11-03)
    Phaiwitthayaphorn, Prapassorn
    ;
    Boonsrimuang, Pisit
    ;
    Reangsuntea, Pongsathorn
    ;
    Fujii, Takashi
    ;
    Sanada, Kosuke
    Recently, the concept of heterogeneous networks (HetNets) has been proposed as an alternative solution to provide higher coverage and capacity for cellular networks. In HetNets concept, many of small base stations (SBSs) are employed in the existing cell of macro base stations (MBSs) to increase the coverage and system capacity. However, the employment of many SBSs in the existing macro cells would causes the increase in power consumption with decreasing the energy efficiency in downlink cellular networks. To solve this problem, this paper proposes a cell throughput based sleep control scheme for the SBSs in HetNets. In the proposed scheme, the cell capacity ratio for the SBSs is employed as decision criteria to put the SBSs into sleep state. From various simulation results, the proposed scheme can achieve better energy efficiency and better system throughput than the conventional schemes.