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针对入出随机早期检测(RIO)算法对支持区分服务的带宽分配产生偏移问题,提出了一种在边界路由器采用漏桶标记算法,核心路由器采用改进的In和Out随机提前检测算法IRIO,支持区分服务的分组转发方案。用ns2仿真器对方案的带宽使用效率、分组转发时延进行了仿真实验,实验结果证明了该方案可为业务提供跳到跳(HopbyHop)的QoS保证;同时仿真结果显示,IRIO与原RIO相比能个别地控制Out队列长度,表明它能够保护TCP流特性,防备突发分组丢失。
Aiming at the problem that the incoming random access early detection (RIO) algorithm is offsetting the bandwidth allocation supporting differentiated services, a label leaky bucket algorithm is proposed in the border routers. The core routers adopt improved In and Out random early detection algorithms IRIO, Service packet forwarding program. The ns2 simulator is used to simulate the bandwidth usage efficiency and packet forwarding delay of the scheme. The experimental results show that the proposed scheme can provide QoS guarantees for the service with Hop-Hop. At the same time, the simulation results show that IRIO and the original RIO phase The ability to individually control the length of an Out queue indicates that it is capable of protecting TCP flow characteristics against burst packet loss.