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Analytical Modeling of Link and Path Dynamics and Their Implications on Packet Length in MANETs

Xianren Wu, Hamid Sadjadpour and J.J. Garcia-Luna-Aceves

International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS 2007)
San Diego, California (USA), July 16-18, 2007


We present an analytical framework and statistical models to accurately characterize the lifetime of a wireless link and multi-hop paths in mobile ad hoc networks (MANET). We show that the lifetimes of links and paths can be computed through a two-state Markov model and that the analytical solution follows closely the results obtained through discrete-event simulations for two mobility models, namely, random direction and random waypoint mobility models. We apply these models to study practical implications of link lifetime on routing protocols. We compute optimal packet lengths as a function of mobility, and show that significant throughput improvements can be attained by adapting information packet lengths to the mobility of nodes in a MANET.

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