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TCP Throughput Improvement over Vertical Handover between 3G LTE and WLAN

机译:通过3G LTE和WLAN之间的垂直切换提高TCP吞吐量

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We address TCP throughput degradation over vertical handover between 3G-LTE and WLAN. 3G-LTE link layer tries to recover packet loss and deliver recovered packets in-order. This may involve link layer holding packets before later arriving packets arrive, causing spurious timeout. A state-of-the-art scheme holds fast retransmit/recovery for one RTT waiting for packets arriving at TCP layer out of order. We show this wait is unnecessary and costs TCP throughput. Our scheme is also able to improve TCP throughput by loss differentiation with parameters adapted to new network on vertical handover, considering link layer characteristics of 3G LTE which supports in-order delivery. Simulation result shows improved TCP throughput under various scenarios with TCP Reno and TCP SACK.
机译:我们解决了3G-LTE和WLAN之间垂直切换时TCP吞吐量下降的问题。 3G-LTE链路层尝试恢复数据包丢失并按顺序交付恢复的数据包。这可能涉及链路层在随后到达的数据包到达之前保存数据包,从而导致虚假超时。最新的方案可保持一个RTT的快速重传/恢复,从而等待数据包无序到达TCP层。我们显示此等待是不必要的,并且会花费TCP吞吐量。考虑到支持有序交付的3G LTE的链路层特性,我们的方案还能够通过损耗微分来提高TCP吞吐率,其参数适用于垂直切换上的新网络。仿真结果表明,在使用TCP Reno和TCP SACK的各种情况下,TCP吞吐量都得到了提高。

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