Research And Improvement Of OLSR Protocol For Manet

The background of the work presented in this dissertation is the research project on Unmanned Aircraft System Group Tactic Network Architecture (UAS-TN), undertaking at Sichuan Network Communication Technology Key Laboratory (SC-Netcom Lab). It is necessary to rethink and rectify architectures of Ad hoc networks and relevant techniques in view that UAS will work in a hostile environment and move much faster than traditional nodes in Ad hoc networks. Therefore, the author's work is dedicated to a popular routing protocol in Ad hoc network, i.e. OLSR (Optimized Link State Routing) protocol. The work presented in this dissertation includes analysis of OLSR and improvement, The author's contribution can be summarized as:A. The current OLSR chooses the MPRs without considering the redundancies because of the USA's high speed. The MPRs choosing by routing protocol will became useless fastly, so the first contribution is to improve the performance of OLSR by redefining the MPRs in ordr to fit for it, and redefining the MPRs is to suit for the Ad Hoc's network architectures and improving the security and reliability. The dissertation's keystone is redefining the MPRs.B. Because of the redundancies redefining MPRs, the second contribution is to improve the MPOLSR (Multi-Path OLSR) and bring forward the SR-OLSR (Standy_Routing based OLSR) arithmetic. The arithmetic can be used when the first routing is null or became useless. At the same time, the success rate of data transmission and time lapse will be improved, so the second contribution is choosing the standy_routing in order to avoid the collisions between channels by MPOLSR.C. Finally, getting and analyzing the result by simulating the OLSR. The simulation tool is OPNET and the modul is OLSR reference by RFC 3626.