Composite performance and availability analysis of wireless communication networks

With the increasing popularity of wireless communication systems, customers are expecting the same level of service, availability, and performance fro m the wireless communication networks as the traditional wire-line networks . Traditional pure performance model that ignores failure and recovery but considers resource contention generally overestimates the system's ability to perform a certain job. On the other hand, pure availability analysis ten ds to be too conservative since performance considerations are not taken in to account. To obtain realistic composite performance and availability meas ures, one should consider performance changes that are associated with fail ure recovery behavior. In this paper, a brief review is first given over th e advances in composite performance and availability analysis. Thereafter, three techniques for composite performance and availability analysis are di scussed in detail through a queueing system in a wireless communication net work. Numerical results show that an approximate model based on a framework originally proposed by Bobbio and Trivedi (BT approach) provides remarkabl y accurate predictions on system performance.