虽然目前 TCP流量在整个 Internet流量中占有主要地位 ,但随着网络带宽的不断升级改造 ,基于 UDP的音频、视频等实时多媒体流量日益增加 ,而这些实时流量一般都需要一定的带宽保证 ,同时又具有 TCP友好的端端拥塞控制机制 .从端主机和网关队列机制两方面着手 ,提出了一种支持 IETF定义的可控负载服务机制 ,其实现原理是在端主机方配置基于令牌桶的自适应的支持标记的速率调节机制 ,在网关采用加强的 RED(随机早期检测 )队列管理机制对不同的流量进行相应的处理 ,然后在 NS仿真环境下对其公平性、带宽使用效率等方面进行实验 ,证明了该机制的有效性和可行性 Although TCP traffic currently occupies a major position in the overall Internet traffic, real-time multimedia traffic such as audio and video based on UDP is increasingly increasing as network bandwidth continues to evolve. However, these real-time traffic generally requires a certain amount of bandwidth guarantee, meanwhile TCP-friendly end-congestion control mechanism.From both the end-host and gateway-queue mechanisms, a controllable load service mechanism that supports IETF definition is proposed. The implementation principle is to configure Token-based Adapting the rate adjustment mechanism of the support tag. The gateway uses the enhanced RED (random early detection) queue management mechanism to deal with different traffic accordingly, and then carries on the experiment on its fairness and bandwidth usage efficiency under the NS simulation environment , Which proves the effectiveness and feasibility of this mechanism