A practical traffic management system for integrated LTE-WiFi networks
A practical traffic management system for integrated LTE-WiFi networks
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DOI：
10.1145/2639108.2639120
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发表时间：
2014-09
期刊：
影响因子：
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通讯作者：
R. Mahindra;H. Viswanathan;K. Sundaresan;Mustafa Y. Arslan;S. Rangarajan
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文献类型：
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作者：
R. Mahindra;H. Viswanathan;K. Sundaresan;Mustafa Y. Arslan;S. Rangarajan
移动的运营商正在利用WiFi来缓解应用程序激增的带宽需求对其网络造成的压力。然而，运营商通常缺乏智能机制来控制用户访问其WiFi网络的方式。这种复杂控制的缺乏造成了较差的网络利用率，这反过来又降低了体验质量（QoE）。为了满足用户流量需求，运营商显然需要能够在蜂窝网络和WiFi网络之间最佳平衡用户流量的解决方案。由于在这一领域缺乏实用的解决方案，我们设计并实现了ATOM -一种用于WiFi-LTE部署的自适应流量卸载的端到端系统。ATOM有两个新的组成部分：（i）网络接口选择算法，其跨WiFi和LTE映射用户流量以优化用户QoE;以及（ii）接口切换服务，其以具有成本效益且标准兼容的方式无缝地重定向正在进行的用户会话。我们在使用YouTube流量的真实的LTE-WiFi测试平台上进行的评估显示，与原始解决方案相比，ATOM将视频停顿减少了3-4倍。
Mobile operators are leveraging WiFi to relieve the pressure posed on their networks by the surging bandwidth demand of applications. However, operators often lack intelligent mechanisms to control the way users access their WiFi networks. This lack of sophisticated control creates poor network utilization, which in turn degrades the quality of experience (QoE). To meet user traffic demands, it is evident that operators need solutions that optimally balance user traffic across cellular and WiFi networks. Motivated by the lack of practical solutions in this space, we design and implement ATOM - an end-to-end system for adaptive traffic offloading for WiFi-LTE deployments. ATOM has two novel components: (i) A network interface selection algorithm that maps user traffic across WiFi and LTE to optimize user QoE and (ii) an interface switching service that seamlessly re-directs ongoing user sessions in a cost-effective and standards-compatible manner. Our evaluations on a real LTE-WiFi testbed using YouTube traffic reveals that ATOM reduces video stalls by 3-4 times compared to naive solutions.