战争篇在诉说数据网络（诸如分组交换网、帧 中继网和ＡＴＭ网）以及互连网时，所面临的一个关键设计问题是拥塞控制。拥塞现象是一个复杂现象。一般情况下，拥塞发生在通过网络传输的分组数据开始接近网络的分组处理能力时。拥塞控制的目标是将网络传输的分组数量维持在一定的 One of the key design issues facing war data networks (such as packet-switched networks, frame relay networks and ATM networks) and the Internet is congestion control. Congestion is a complex phenomenon. In general, congestion occurs when packet data transmitted over the network begins to approach the packet processing capabilities of the network. The goal of congestion control is to keep the number of packets transmitted by the network at a certain level