Reliability Analysis of Wireless Link for IOT Applications Under Shadow-Fading Conditions

摘要

Sensor nodes in IoT applications exhibit limited computing power, communication range and energy resource. These are some of the major constraints in the deployment of these systems. This leads to a multivariable optimization problem. Further, the variations in geographic conditions such as ground, terrain, atmosphere and mobility between various nodes introduces severe randomness in received signal strength at particular nodes. To mitigate this random nature of wireless link, probabilistic channel models are explored and analyzed. For more realistic estimation, multiple factors such as fading, shadowing, interference and noise must be considered simultaneously. In this paper, the reliability of wireless link in such environment is analyzed by capturing effect of these parameters through compound probability distributions. Expressions for Link and node outage have been obtained and measured through network simulation for reliability analysis. The comparative study with the other available fading models shows that the proposed model is more suitable in approximating real phenomenon of wireless link design.