TCP-H：基于三重判决的TCP拥塞控制

在异构无线网络中存在高误码、切换、信号衰落等链路特性，使传统的TCP拥塞控制机制受到了挑战。在不增加开销的情况下，基于丢包检测、RTT时间和ACK返回速率三重判决，提出了一种新的TCP拥塞控制机制（TCP—H）。仿真结果表明，TCP—H增强了对拥塞和随机差错的区分能力，满足公平性要求，改进的最小RTT计算方法解决了在低延迟向高延迟网络切换的时Vegas，Westwood等算法存在的最小RTT更新问题，有效提高了在异构无鲅网络环埔下TCP的性能．

TCP-H: A new TCP congestion control mechanism based on triple decisions

The application of TCP over heterogeneous wireless networks is a challenging work due to high bit error rates, fading channels and handoff. Combined with the triple decisions of packet loss detection, the estimation of RTT and the rate of ACK, a new TCP congestion control mechanism （TCP-H） was proposed for heterogeneous wireless networks. The simulation results show that TCP-H can strengthen the capability to distinguish congestion and random errors, and has a good fairness. TCP-H succeeded in solving the problems that Vegas and Westwood had when networks handoff from low-latency to high-latency, with improved minimum RTT calculation method. TCP-H can improve the performance of the heterogeneous networks efficiently.