Towards Wifi Mobility without Fast Handover
Towards Wifi Mobility without Fast Handover
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2015-05
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WiFi由于其低功耗和高容量而成为移动的客户端的首选连接解决方案。密集的城市WiFi部署覆盖了整个中心区域，但缺少的一件事是无缝的移动的体验。WiFi中的移动性传统上追求快速切换，但我们认为这是一个错误的目标，开始。相反，我们建议移动的客户端应该连接到他们看到的所有接入点，并使用新部署的MPTCP协议将流量分配给它们。我们让一个移动的连接到多个AP在同一个信道上，或在不同的信道上，并通过详细的实验和模拟表明，这种解决方案大大提高了容量和可靠性的TCP连接直接为某些口味的WiFi a/B/g。我们还发现，在某些情况下，连接到多个AP会严重降低吞吐量，并提出了一系列客户端更改，使此解决方案在各种场景下都具有鲁棒性。
WiFi is emerging as the preferred connectivity solution for mobile clients because of its low power consumption and high capacity. Dense urban WiFi deployments cover entire central areas, but the one thing missing is a seamless mobile experience. Mobility in WiFi has traditionally pursued fast handover, but we argue that this is the wrong goal to begin with. Instead, we propose that mobile clients should connect to all the access points they see, and split traffic over them with the newly deployed MPTCP protocol. We let a mobile connect to multiple APs on the same channel, or on different channels, and show via detailed experiments and simulation that this solution greatly enhances capacity and reliability of TCP connections straight away for certain flavors of WiFi a/b/g. We also find there are situations where connecting to multiple APs severely decreases throughput, and propose a series of client-side changes that make this solution robust across a wide range of scenarios.