A Handoff Algorithm Based on Estimated Load for Dense Green 5G Networks
A Handoff Algorithm Based on Estimated Load for Dense Green 5G Networks
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DOI：
10.1109/glocom.2014.7417634
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发表时间：
2014-12
期刊：
影响因子：
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通讯作者：
A. H. Arani;M. Omidi;A. Mehbodniya;F. Adachi
中科院分区：
文献类型：
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作者：
A. H. Arani;M. Omidi;A. Mehbodniya;F. Adachi
5G面临的两个重要挑战是异构无线网络（HetNet）中的能量效率和移动的用户的移动性。用于提高能量效率的重要技术之一是基站（BS）在ON和OFF模式之间的切换，这允许BS在较低负载情况下关闭其一些组件。本文针对用户的无缝移动问题，提出了一种基于基站估计负载的切换算法。所提出的基于估计负载的HO算法（PHA-EL）通过将HO从高负载BS施加到轻负载BS来平衡负载。当BS过载时，用户的服务质量（QoS）将降低，因此PHA-EL被用于提高系统吞吐量。PHA-EL算法与能够在ON和OFF模式之间切换的BS（PHA-EL/ON-OFF切换）相结合，以提高系统的能量效率。仿真结果表明，该算法在平均HO数、每个BS的平均负载和每个BS的平均收益方面比基线算法有更好的性能。
Two important challenges facing 5G are energy efficiency and mobile users' mobility in heterogeneous wireless networks (HetNets). One of the important techniques for improving energy efficiency is base station (BS)'s switching between ON and OFF modes which allows the BS to turn off some its components in lower load situations. In this paper, we address user's seamless mobility problem and propose a handoff (HO) algorithm based on BS's estimated load. The proposed HO algorithm based on estimated load (PHA-EL) balances load by imposing HOs from highly loaded BSs to lightly loaded BSs. When a BS is overloaded, the user's quality of service (QoS) will degrade and therefore the PHA-EL is used to improve system throughput. The PHA-EL algorithm is combined with BSs which are able to switch between ON and OFF modes (PHA-EL/ON-OFF switching) in order to improve the energy efficiency of the system.Therefore, this algorithm achieves both energy- and spectral- efficiency. Simulation results indicate that the proposed algorithm yields better performance in terms of average number of HOs, average load per BS and average payoff per BS, compared to baseline algorithm.