| A Vehicular AdHoc Network, or VANET, is a form of Mobile adhoc network, to provide communications among nearby vehicles and between vehicles and nearby roadside equipment. Thanks to the advances of technology,nowadays many vehicles are equipped with GPS devices and embeded computers, and VANET will come into reality in the near future. The main topic of this thesis is analyze and implement one kind application protocol of VANET—LINGER protocol.LINGER protocol aims at transmission of information between one vehicle to the others in a certain area,employing the cooperation of intermediate vehicles and GPS technology. Though the protocol was inspired by the vehicle communication,the application of LINGER protocol could be applied to the similar scenario(nodes are equipped with positioning devices and wireless interface).First,the basis knowledges and research meaning of this topic is discussed,and the working condition and softwares needed during implement phase are also given.We aim to develop code library for LINGER protocol,which can be used by developer to develope applications supporting LINGER protocol through function invocation. Consider the real scenario,we chose Linux system as our development environment.To implement LINGER protocol,we analyze the protocol and divide it into kinds of states,then the protocol flows from one state to another.we also decide what should be done at each state and at what conditions the transition happens between those states. Though the packet formats have been specified by the protocol,during the implementation we add some other items to make the implement not so difficult.LINGER protocol has two versions,each of them are analyzed and implemented.To test the code library, a simple application supporting LINGER protocol is designed,and the test plan for verifying the correctness and evaluation of performance for the code library is designed and discused.Finally,we make a coclution of our work and a plan for future work. |
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