Analysis of a p-persistent CSMA packetized cellular network with capture phenomena

Abstract

A p-persistent CSMA protocol suitable for packetized mobile radio-telephone cellular networks with capture and a number of mobile terminals transmitting to a common receiver is considered. In a micro-cellular environment, messages from different transmitting terminals will suffer different attenuations (path loss and fading phenomena), yielding different levels of energy at the receiver. Thus, one out of ‘i’ attempting transmission packets will be successfully transmitted with some capture probability f i. Assuming that the receiver is within the range and in line-of-sight of all the mobile users in the cell, the capture probabilities can be determined by means of simulation, and a new probabilistic Markov model for the above network is introduced and analysed using the slot property of the channel. Under moderate packet length size the results obtained in respect of the throughput-delay performance and stability under heavy traffic conditions are promising compared with those of the corresponding conventional p-persistent CSMA schemes.