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MPWiFi: Synergizing MPTCP based Simultaneous Multipath Access and WiFi Network Performance
IEEE Transactions on Mobile Computing ( IF 7.7 ) Pub Date : 2020-01-01 , DOI: 10.1109/tmc.2018.2889059
Mijanur Rahaman Palash , Kang Chen

Multipath TCP (MPTCP) enables a client to exploit multiple wireless paths simultaneously for improved throughput and mobility resilience. However, MPTCP clients in WiFi networks may easily lower the achievable throughput of the network due to excessively created connections over access points (APs), particularly those that own a weak link quality. This is caused by the fact that the maximal achievable throughput of a WiFi AP can be easily affected by the number of connections accessing it and the link qualities of those connections. In this paper, we first verify such effects through extensive experiments and analysis. We then propose a novel scheme, denoted MPWiFi, to solve this issue while keeping the benefits of MPTCP based multipath access in WiFi networks. Our scheme allows a MPTCP client to obtain resources on its best WiFi path freely and suppresses its subflows in additional paths when congestion happens. As a result, the degrading to the WiFi AP's achievable throughput is greatly prevented with acceptable influences on the benefits of MPTCP clients (i.e., their multipath access is intervened only on congested non-best APs). The fairness to MPTCP clients is also guaranteed through their best WiFi connection. The proposed solution is implemented along with the Linux Kernel MPTCP implementation. Extensive real-world deployment based experiments and NS3 simulation show that the proposed scheme can effectively alleviate the adverse impact of MPTCP based multipath access in WiFi networks while keeping its benefits.

中文翻译:

MPWiFi:协同基于 MPTCP 的同时多路径访问和 WiFi 网络性能

多路径 TCP (MPTCP) 使客户端能够同时利用多个无线路径,以提高吞吐量和移动弹性。然而,由于在接入点 (AP) 上过度创建连接,特别是那些拥有弱链接质量的连接,WiFi 网络中的 MPTCP 客户端可能很容易降低网络的可实现吞吐量。这是因为 WiFi AP 的最大可实现吞吐量很容易受到访问它的连接数量和这些连接的链接质量的影响。在本文中,我们首先通过大量的实验和分析来验证这种效果。然后,我们提出了一种新的方案,称为 MPWiFi,以解决这个问题,同时保持 WiFi 网络中基于 MPTCP 的多路径访问的好处。我们的方案允许 MPTCP 客户端在其最佳 WiFi 路径上自由获取资源,并在发生拥塞时抑制其在其他路径中的子流。结果,极大地防止了 WiFi AP 可实现吞吐量的降低,同时对 MPTCP 客户端的好处产生了可接受的影响(即,它们的多路径访问仅在拥塞的非最佳 AP 上进行干预)。MPTCP 客户端的公平性也通过其最佳 WiFi 连接得到保证。建议的解决方案是与 Linux 内核 MPTCP 实现一起实现的。广泛的基于实际部署的实验和 NS3 仿真表明,所提出的方案可以有效地减轻 WiFi 网络中基于 MPTCP 的多路径访问的不利影响,同时保持其优势。极大地防止了 WiFi AP 可实现吞吐量的降低,同时对 MPTCP 客户端的好处产生了可接受的影响(即,它们的多路径访问仅在拥塞的非最佳 AP 上进行干预)。MPTCP 客户端的公平性也通过其最佳 WiFi 连接得到保证。建议的解决方案是与 Linux 内核 MPTCP 实现一起实现的。广泛的基于实际部署的实验和 NS3 仿真表明,所提出的方案可以有效地减轻 WiFi 网络中基于 MPTCP 的多路径访问的不利影响,同时保持其优势。极大地防止了 WiFi AP 可实现吞吐量的降低,同时对 MPTCP 客户端的好处产生了可接受的影响(即,它们的多路径访问仅在拥塞的非最佳 AP 上进行干预)。MPTCP 客户端的公平性也通过其最佳 WiFi 连接得到保证。建议的解决方案是与 Linux 内核 MPTCP 实现一起实现的。广泛的基于实际部署的实验和 NS3 仿真表明,所提出的方案可以有效地减轻 WiFi 网络中基于 MPTCP 的多路径访问的不利影响,同时保持其优势。MPTCP 客户端的公平性也通过其最佳 WiFi 连接得到保证。建议的解决方案是与 Linux 内核 MPTCP 实现一起实现的。广泛的基于实际部署的实验和 NS3 仿真表明,所提出的方案可以有效地减轻基于 MPTCP 的多径接入在 WiFi 网络中的不利影响,同时保持其优势。MPTCP 客户端的公平性也通过其最佳 WiFi 连接得到保证。建议的解决方案是与 Linux 内核 MPTCP 实现一起实现的。广泛的基于实际部署的实验和 NS3 仿真表明,所提出的方案可以有效地减轻基于 MPTCP 的多径接入在 WiFi 网络中的不利影响,同时保持其优势。
更新日期:2020-01-01
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