Design And Implementation Of Node Instrument AD Hoc Network Communication System

The rapid development of various contemporary industries has an urgent demand for natural resources.Therefore,my country has gradually increased research in the field of geological exploration,and the geological exploration scene is expanding towards larger scale,larger area exploration,and more complex terrain.With the vigorous development of wireless communication technology and ad hoc network technology,the communication mode of geological exploration system has changed from traditional wired transmission to wireless transmission.However,the coverage area of wireless communication is very limited and cannot flexibly adapt to complex Geological exploration scenarios,and the nodes use single-hop communication,which is difficult to meet the networking requirements.Therefore,for the wireless exploration seismic node instrument system,the wireless ad hoc network technology applicable to it is proposed,and the ad hoc network communication system based on the node instrument is designed and implemented.This thesis chooses LoRa,which has the characteristics of low power consumption and long distance,as its wireless communication method,and proposes a wireless multihop communication scheme based on the node instrument.Analyze the advantages and disadvantages of various networking protocols.According to the characteristics of the static network topology and multi-hop networking requirements of this system,this thesis chooses to improve the AODV protocol,design the networking process,and solve the "broadcast storm" that exists in it.question.Based on this networking protocol,the overall design scheme of the communication system is given,which is divided into two parts: the acquisition node and the main node,and the self-organizing network communication system is designed and realized through hardware and software,so that data can be transferred from the node to the remote end The entire data transmission process of the server.In terms of hardware,the hardware design of LoRa wireless communication circuit and 4G wireless communication circuit is completed;in terms of software,the specific software design and program design of each module are given according to the networking protocol designed in this thesis.Finally,a channel collision model is established for the hidden terminal problem,and its function test is carried out through the simulation analysis of the NS3 network simulation platform and the establishment of a test environment.The simulation results show that the improved AODV protocol can effectively avoid broadcast storm and other problems,and its routing overhead is reduced by about 44% on average,and the route establishment time and transmission delay are reduced by at least 20% and 15%respectively.The feasibility of the designed communication system based on node instrument ad hoc network is verified through the test,which meets the relevant functional requirements and achieves the expected design goal.