Backhaul-Aware User Association in FiWi Enhanced LTE-A Heterogeneous Networks
Backhaul-Aware User Association in FiWi Enhanced LTE-A Heterogeneous Networks
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DOI：
10.1109/twc.2015.2399308
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发表时间：
2015-02
影响因子：
10.4
通讯作者：
H. Beyranvand;W. Lim;M. Maier;C. Verikoukis;J. Salehi
中科院分区：
文献类型：
--
作者：
H. Beyranvand;W. Lim;M. Maier;C. Verikoukis;J. Salehi
在本文中，我们揭示了过去在很大程度上被忽视的移动的回程网络的延迟和可靠性问题，并研究了它们对LTE-A异构网络（HetNets）的影响。具体来说，我们提出了一个回程感知的光纤无线（FiWi）增强LTE-A HetNet的用户关联算法。最先进的光纤回程基础设施的性能限制因素突出，并描述了各种解决方案。为了减轻回程对光纤切断的脆弱性，我们引入了不同的先进保护技术。考虑到回程的延迟和可靠性方面的给定条件，我们提出了一种分布式负载均衡算法，用于FiWi-LTE HetNet中的用户关联。所提出的算法进行了分析和评估数值比较其性能与国家的最先进的替代方法的平均延迟，阻塞概率，平均可实现的吞吐量，和服务中断的百分比。所得到的结果表明，我们的算法优于其同行的延迟和服务中断的百分比，而其平均可实现的吞吐量是相同的回程不知道的替代解决方案。此外，所提出的回程感知的负载均衡方法的阻塞概率被证明是高于回程不知道的。
In this paper, we shed some light on the latency and reliability issues of mobile backhaul networks, which have been largely ignored in the past, and examine their impact on LTE-A heterogeneous networks (HetNets). Specifically, we propose a backhaul-aware user association algorithm for fiber-wireless (FiWi) enhanced LTE-A HetNets. The performance limiting factors of state-of-the-art fiber backhaul infrastructures are highlighted and a variety of solutions are described. To mitigate the vulnerability of the backhaul against fiber cuts, we introduce different advanced protection techniques. Accounting for the given conditions of the backhaul in terms of delay and reliability, we present a distributed load-balancing algorithm for user association in FiWi-LTE HetNets. The proposed algorithm is analyzed and evaluated numerically by comparing its performance with state-of-the-art alternative approaches in terms of average delay, blocking probability, average achievable throughput, and service interruption percentage. The obtained results demonstrate that our algorithm outperform its counterparts in terms of delay and service interruption percentage, while its average achievable throughput is the same as that of a backhaul-unaware alternative solution. In addition, the blocking probability of the proposed backhaul-aware load-balancing method is shown to be higher than that of backhaul-unaware ones.