QoS Monitoring and Analysis Approach for Publish/Subscribe Systems Deployed on MANET

In this paper, we propose a decentralized and adaptive approach for QoS aware publish/subscribe systems deployed on MANET. It provides monitoring and analysis modules acting at the middleware layer to detect QoS degradations between brokers. The paper presents a statistical method allowing for a permanent measurement of QoS parameters and an instantaneous detection of link failures. The statistical method used resorts to the Extreme Values Theory (EVT) and particularly uses the Gaussian and Gumbel distributions to approximate empirical distributions of the measured QoS parameter. Simulation results show the efficiency of the proposed approach.