Research On And Improvement Of OLSR Protocol For Uasg-TNA

The background of the work presented in this dissertation is the research project on Unmanned Aircraft System Group Tactic Network Architecture (UASG-TNA), 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. Routing information exchange and routing algorithms are very important for any 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 include analysis of OLSR and improvement, author's contribution can be summarized as:A. The first contribution is to improve the performance of OLSR by incorporating feedbacks of MAC layer functioning information and Topology Control (TC) message retransmitting mechanism into routing decision. Simulation results have shown that this strategy enables selection of a path with less collision consequently to increase successful reception rate when network is in a heavy loaded condition and with unbalanced node-traffic.B. Further improved the SR-MPOLSR (Source-Routing based Multi-Path OLSR) introduced by Xun Zhou, a PhD student at SWJTU by use of the topology table obtained through feedback of MAC layer information and TC retransmission. Simulation of the improved SR-MPOLSR has better performance.C. Finally, the author made an experiment on testing video streams transmission over an emulated UASG-TNA network with a useful result. This was done by adding a new module to the simulation tool - OPNET.