This paper introduces a method for realize multiple timers by using a single timer.It is based on the ARQ protocol model of data link layer, and can be used after modification in some protocols.

• 本文介绍了一种用单个定时器模拟实现多个定时器的方案，该方案以数据链路层ARQ协议模型为基础，经过修改可以很容易地应用于各种通信协议。