QoE-Driven Optimized Load Balancing Design for Hybrid LiFi and WiFi Networks

QoE-Driven Optimized Load Balancing Design for Hybrid LiFi and WiFi Networks
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适用于混合 LiFi 和 WiFi 网络的 QoE 驱动优化负载平衡设计

DOI:
10.1109/lcomm.2018.2869388
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发表时间:
2018-09
期刊:
IEEE Communications Letters
影响因子:
--
通讯作者:
张琳
张琳
中科院分区:
其他
文献类型:
--
作者:
Weibin Ma;张琳

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混合光保真(LiFi)和无线保真(WiFi)网络被认为是未来室内无线通信的有前途的解决方案。在这封信中,我们调查的流量负载平衡(LB)的问题,这种混合网络。在我们的设计中,考虑到用户终端(UT)可能具有不同的数据速率需求,我们利用LiFi网络的宽带宽和WiFi网络的宽覆盖区域的互补优势来服务UT。考虑到接入点的异构性和UT对数据速率的体验质量(QoE)需求,我们将LB问题表示为混合整数非线性规划问题,其目标是在比例公平约束下最大化系统吞吐量,仿真结果表明,采用所提出的QoE-1算法,在LB方案的驱动下,更多的UT以更高的QoE被服务,同时保持高的系统吞吐量和比例公平性。
The hybrid light fidelity (LiFi) and wireless fidelity (WiFi) networks are regarded as a promising solution for future indoor wireless communication. In this letter, we investigate the traffic load balancing (LB) issue for this hybrid networks. In our design, considering that user terminals (UTs) may have different data rate demands, we utilize the complementary advantages of the wide bandwidth of the LiFi network and the wide coverage area of the WiFi network to serve the UTs. With considerations of the access point heterogeneity and UTs’ quality of experience (QoE) demands for data rate, we then formulate the LB issue as a mixed-integer non-linear programming problem with the aim of maximizing the system throughput under proportional fairness constraints, and propose a distributed optimal algorithm and a simplified suboptimal sequential algorithm to solve it. Simulation results demonstrate that using the presented QoE-driving LB scheme, more UTs are served with higher QoE while maintaining high system throughput and proportional fairness.
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