The effect of prioritization on the behavior of a concentrator under an accept, otherwise reject strategy

The effect of prioritization on the behavior of a concentrator which accepts packetized messages and receives a service from a transmitter operating in synchronous mode is studied. The messages arrive according to a Poisson process, and are divided into two classes: ordinary and priority. A buffer is shared between ordinary and priority packets. Two buffer-sharing strategies are considered: sharing with maximal length, and complete sharing subject to purgation. Upon the arrival of a message, if its size exceeds the remaining buffer space, then the message will be completely rejected. For each buffer-sharing strategy, results obtained include state transition probability, state probability, blocking probability, throughput, and delay. Computer simulations are used to verify the validity of results