Time Varying Performance Analysis of Multihop Wireless Networks with CBR Traffic

In this paper, we develop a performance modeling technique for analyzing the time varying network layer queuing behavior of multihop wireless networks with constant bit rate (CBR) traffic. Our approach is a hybrid of a time varying adjacency matrix and a fluid flow queuing network model. Mobile network topology is modeled using time varying adja- cency matrix, while node queues are modeled using fluid flow based differential equations which are solved using numerical methods. Numerical and simulation experiments show that this new approach can provide reasonably accurate results. Moreover, when compared to the computation time required in a standard discrete event simulator, the fluid flow based model is shown to be a more scalable tool. Finally, an illustrative example of our modeling technique application is given to show its capability of capturing the time varying network performance as a function of traffic load, node mobility and wireless link quality