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在网络系统中，节点缓冲区内消息发生覆盖或溢出会造成消息的丢失，对于限时令牌网络，节点消息发送时间和消息缓冲容量的分配是影响消息实时性的重要因素．针对令牌传递网络分析了节点消息缓冲机制，说明了消息缓冲容量的确定与网络带宽分配方法的关系，并提出了消息缓冲容量的确定方法，导出了避免消息覆盖或溢出所需的最大发送和接收缓冲容量余度．指出在消息的产生间隔大于该消息的最大允许的延迟时间和接收节点响应时间的条件下，发送和接收端的消息缓冲容量等于被缓冲消息的长度．
In the network system, the messages in the node buffer are overwritten or overflowed. For the time-limited token network, the node message sending time and the message buffer size are the important factors that affect the real-time performance of the message. This paper analyzes node message buffering mechanism based on Token Transfer Network, describes the relationship between message buffering capacity and network bandwidth allocation method, and proposes a method of determining message buffering capacity, and deduces the maximum send and buffer size needed to avoid message coverage or overflow Receive buffer capacity redundancy. It is pointed out that the message buffering capacity at the sending and receiving ends equals to the length of the buffered message under the condition that the message generation interval is greater than the maximum allowable delay time of the message and the receiving node response time.