【摘要】 在MANET中,节点的移动性会导致在接收端产生大量的乱序数据包,影响TCP协议的性能.提出了一种改进的TCP协议(TCP-D),通过延时触发拥塞控制算法,来提高TCP协议在MANET中的性能.对延时响应TCP协议的吞吐量分析表明,当网络中不存在乱序数据包时,改进协议可以获得类似于标准TCP协议的吞吐量,保证对标准TCP协议的友好性.仿真实验表明,在网络中存在乱序数据包的情况下,改进后的TCP算法可以获得较标准TCP协议更高的网络吞吐量,而在无乱序数据包的情况下,改进协议仍具有很好的公平性和友好性.更多还原

【Abstract】 The mobility of nodes in mobile ad hoc networks(MANET) will result in lots of disordered data packets at receiving end,thus degrading the performance of TCP protocol.A new protocol(TCP-D) was proposed to improve the performance of TCP in MANET via the congestion control algorithm with trigger response delayed for a short time.The analysis of the response delayed TCP protocol showed that if no disordered packets in MANET,its steady state throughput is similar to that implemented according to standard TCP,thus providing the compatibility with standard TCP protocol.Moreover,the simulation results showed that if there are disordered packets in MANET,the response delayed TCP protocol can offer the throughput more than the standard TCP,and it still has quite good fairness and compatibility if no disordered packets.更多还原