数据中心网络中基于传输速率分配的TCP协议

Transmission Rate Allocation Based TCP Protocol in Data Center Network

传输控制协议(Transmission Control Protocol,TCP)是数据中心网络中常用的传输协议;然而,同一个网络环境下,由于TCP协议的公平共享原则,TCP无法保障不同优先级业务的服务质量;针对该问题,提出了基于传输速率分配算法的TCP (Transmit Rate Allocation based TCP,TRA-TCP);汇聚节点实时监测记录不同优先级业务的数据传输速率,并为不同优先级的业务流分配不同的传输速率,以保障高优先级业务的QoS;实验表明,与已有协议相比,TRA-TCP协议最高能够将高优先级业务的吞吐量提升25%,并且将高优先级业务的时延保持在0.1秒以下,丢包率保持在5%左右。

Transmission control protocol(TCP)is a commonly used transmission protocol in data center networks.However,under the same network environment,due to the principle of fair sharing of TCP protocols,TCP cannot guarantee the quality of service(Qos)of different priority services.Aiming at this problem,a TCP protocol based on the transmission rate allocation algorithm(TRA-TCP)is proposed.The aggregation node monitors and records the data transmission rate of different priority services in real time,and allocates different transmission rates for service flows of different priorities to ensure the QoS of high priority services.Simulation experiment results show that TRA-TCP protocol can improve the throughput of high priority traffic to 25%compared to the ohter existing protocols,keep the average packet delay of high priority traffic below 0.1 seconds,and keep the packet loss rate around5%.