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首页> 外文期刊>IEEE Transactions on Vehicular Technology >Robust Cross-Layer Design of Wireless-Profiled TCP Mobile Receiver for Vertical Handover
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Robust Cross-Layer Design of Wireless-Profiled TCP Mobile Receiver for Vertical Handover

机译：用于垂直切换的无线配置TCP移动接收器的稳健跨层设计

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摘要

In this paper, we consider downward and upward vertical handovers in integrated wireless LAN and cellular networks and address wireless-profiled Transmission Control Protocol premature timeouts due to step increase of round-trip time (RTT) and false fast retransmit due to packet reordering. Specifically, we develop a mobile-receiver centric loosely coupled cross-layer design, which is easy to implement and deploy, backward compatible with the Wireless Application Protocol version 2 architecture, and robust in the absence of perfect cross-layer information. We propose two proactive schemes, called RTT Inflation and RTT Equalization. The RTT Inflation scheme suppresses premature timeouts by carefully inflating retransmission timeout time, and the RTT Equalization scheme prevents false fast retransmit by equalizing the round-trip delay experienced by all packets. We conduct extensive simulations to evaluate the performance in downward and upward vertical handovers. It is demonstrated that the proposed schemes significantly improve the performance in a wide range of network conditions.
机译：在本文中，我们考虑了集成无线LAN和蜂窝网络中的向下和向上垂直切换，并解决了由于往返时间（RTT）的逐步增加而导致的无线配置的传输控制协议过早超时以及由于数据包重新排序导致的虚假快速重传。具体来说，我们开发了以移动接收器为中心的松散耦合跨层设计，该设计易于实现和部署，与无线应用协议版本2体系结构向后兼容，并且在缺乏完美的跨层信息的情况下也很健壮。我们提出了两种主动方案，称为RTT通货膨胀和RTT均衡。 RTT膨胀方案通过谨慎地增大重传超时时间来抑制过早超时，RTT均衡方案通过均衡所有数据包经历的往返延迟来防止错误的快速重传。我们进行了广泛的仿真，以评估下行和上行垂直切换的性能。证明了所提出的方案显着提高了在广泛网络条件下的性能。

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