tailieunhanh - Báo cáo hóa học: " Research Article A Markovian Model Representation of Individual Mobility Scenarios in Ad Hoc Networks and Its Evaluation"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article A Markovian Model Representation of Individual Mobility Scenarios in Ad Hoc Networks and Its Evaluation | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 35946 14 pages doi 2007 35946 Research Article A Markovian Model Representation of Individual Mobility Scenarios in Ad Hoc Networks and Its Evaluation C. A. V. Campos and L. F. M. de Moraes High-Speed Networks Laboratory RAVEL COPPE Federal University of Rio de Janeiro UFRJ RJ Brazil Received 15 July 2006 Revised 27 January 2007 Accepted 30 January 2007 Recommended by Marco Conti Adequate representation of mobility is a very important issue in simulation of mobile ad hoc networks. In this context we consider the characterization of the mobile nodes movement through a Markovian modeling. Our proposed representation allows for smooth movements and the generation of several different mobility profiles. This approach is also shown to be more suitable for use in various ad hoc networks scenarios than other proposed mobility models such as the random waypoint RWP model. An evaluation of the proposed model is provided under different border rule scenarios. In addition the performance of AODV DSR and DSDV routing protocols is also studied through simulations utilizing the proposed model and the results obtained are discussed. Copyright 2007 C. A. V. Campos and L. F. M. de Moraes. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Mobile ad hoc networks MANETs are wireless networks that do not need an infrastructure to be set up for communication and data distribution. Thus a sender node can either forward data directly to the destination device when it is close enough or through intermediate devices when the destination is out of reach in a single hop. In this context all the wireless mobile nodes MNs must have the capacity to forward data acting as routers. However in these .