【摘要】 本文对TCP在拥塞丢失和非拥塞丢失同时存在的不可靠网络环境中的性能进行了理论分析 ,给出了TCP吞吐量 ,延时以及分组丢失概率的简明表达式 .同时针对多个TCP连接共享一条限速链路时服务质量不均衡问题 ,提出了轮询丢弃策略和惩罚丢弃策略两种服务质量控制策略 .仿真结果表明 ,轮询丢弃策略可以提高限速链路的总吞吐量 ,而惩罚丢弃策略可以提高TCP连接之间的公平性更多还原

【Abstract】 In this paper,TCP performance in lossy networks with both congestion loss and non congestion loss is analyzed,from which the TCP throughput,delay and packet loss rate are derived. Also,a polling scheme and punishing scheme are proposed to provide QoS guarantee for diverse user requirements.Simulation results show that the polling scheme can get higher throughput,while the punishing scheme can achieve better fairness.更多还原