Adaptive-channel-capacity store-and-forward buffers

A store-and-forward message-switching system is considered, in which the capacity of a channel can be changed dynamically in response to the number of messages awaiting transmission. Three different control strategies are considered. In one, the channel capacity is decided at fixed intervals of time; in the second, the interdecision intervals are random but conform to a fixed distribution; in the third, the decision is made on the arrival and departure of each message. The three strategies are analysed and compared.