Performance evaluation of packet mobile communications through level crossing analysis

摘要

In this paper the performance of a packet mobile radio network is studied in the presence of shadow fading outage intervals. Under quite general assumptions for the medium access protocol, the probability mass function of the sequence of packets that may be lost due to an outage interval is derived. It is seen that long sequences of lost packets are likely to occur for typical values of the mobile speed and shadowing correlation parameters. For delay constrained sources, e.g., voice, the analysis is mainly focused at deriving the probability function of the sequence of dropped packets and the probability of dropping. For data sources, the delay statistic is also derived. In the latter case, the effect of finite buffer length is addressed. Simulation is used to verify the accuracy of approximations introduced in the analysis.