中文摘要：

借助跨层交互机制,提出了一种利用MAC层估计的可用带宽和数据包的往返延迟调整源端发送速率的TCP改进方案.静态场景和动态场景的仿真结果表明,该方法可以减少TCP的平均慢启动次数,吞吐率比传统的TCP显著提高.改进后的TCP增强了对Ad hoc网络环境的适应性,从而提高了网络的性能.

英文摘要：

stract： With the help of the cross-layer interactive mechanism, a scheme for improvement was proposed. In the scheme, first the bandwidth and delay in MAC layer were measured and passed back to the sending end, Then transport layer of sending end modified its sending rate according to the received information. Simulation results in bath static and dynamic scenarios show that the method decreases the slow-start times largely and imcrease the TCP throughput a lot. The improved TCP is more adaptable to the environment ofAd hoc network, which in turn improves the function of network.