Research On Mobile Ad Hoc Network With Intelligent Terminal Based On LoRa Peripherals

In recent years,with the development of social economy,the people's living standards have been increasing,and professional outdoor sports have also become popular.Places where such campaigns are carried out are often in the wilderness away from communication infrastructures.Communication between team members requires traditional communication methods such as walkie-talkies,but such programs often have problems such as mono-functioning and high power consumption.It usually does not have more complicated functions such as location information sharing and personnel management among team members.The problem of communication and location sharing in the above-mentioned field environment can be attributed to a wide-area network with certain reliability,low-power consumption and movable nodes,which can achieve long-distance communication coverage and can locate nodes in the network.In order to solve the above problems,this paper designs a self-organizing network communication system based on LoRa technology by researching related IoT technologies such as short-range wireless ad hoc networks in scenarios such as wireless meter reading.First of all,the system makes full use of LoRa's characteristics of long-distance communication with lower power consumption,and combines it with the rich computing resources of the mobile phone.A LoRa communication peripheral combined with a mobile phone constitutes a communication node in the network.LoRa peripherals are only responsible for data transmission and reception,while the streamlined routing algorithm is implemented in the mobile phone system to expand the communication distance by multi-hop networking.Secondly,the system implements the precise positioning scheme based on GPS technology,and designs a coarse positioning scheme based on TDOA algorithm.By limiting the relative position between the positioning reference nodes and averaging the positioning results multiple times,a relatively accurate result is obtained.Finally,the complex top-level functions such as information sharing and management between nodes are realized through the interactive interface of the mobile phone.This system can expand the communication distance under certain reliability and provide reasonable coarse positioning results through field testing and simulation verification.