摘要： 由于无线移动网络的发展，拓扑环境复杂多变，传统的测量网络参数的方法不再适合。采用新的方法计算RTT，使得准确度更高，不仅能够及时反映网络的变化而且能够过滤掉噪声，在网络发生丢包后，通过对RTT变化的实时分析来判断网络是否拥塞，判断丢包是由网络拥塞还是无线链路引起的随机错误，然后分别采取不同的措施。最后使用NS2进行模拟，验证了该算法。
关键词:
拥塞控制,
RTT,
过滤器,
TCP,
NS2
Abstract: Because of the development of wireless mobile networks, the topology is complicated and inconstant, the traditional ways of measuring the network parameters are not appropriate any more. This paper uses a new way to measure RTT and has a high accuracy, it not only reflects network changes timely but also filters the noise. It can determine if the network is congested based on the real time analysis of RTT changes after packet loss expires, thus to determine the reason of dropping packets is network congestion or the random error on the wireless networks, then take different measures separately. It uses NS2 to simulate the new way and verify it.
Key words:
Congestion control,
RTT,
Filter,
TCP,
NS2
中图分类号:
曲大鹏;黄东军;齐 芳. 异构网络环境下TCP协议性能提高方法[J]. 计算机工程, 2006, 32(22): 127-129.
QU Dapeng; HUANG Dongjun; QI Fang. New Way of Improving TCP Performance Based on RTT over Heterogeneous Networks[J]. Computer Engineering, 2006, 32(22): 127-129.