| Urban sanitation is a concentrated expression of urban living conditions and the social development.In recent years,the development of smart trash can sanitation monitoring systems has become increasingly mature,but there are still problems,such as high energy consumption,limited transmission distance and data loss easily in the communication transmission of monitoring information.Because of its advantages of low power consumption,long transmission distance and low data loss rate,LoRa communication technology is widely used in the application scenarios of smart city sanitation monitoring systems,however,the design of its communication scheduling algorithm and the design of communication rate have always been the key difficulties that have troubled the reliability of its communication and the effective use of channels.In view of the above difficulties,this paper proposes a new communication scheduling algorithm from the perspective of LoRa’s RF performance design,combined with time division multiplexing technology and competitive communication algorithms,to achieve millisecond delay and extremely low error rate.It satisfies all kinds of application scenarios in smart cities,and it is applied to actual smart trash can project scenarios,which verifies the superiority and reliability of the algorithm and solves the communication requirement of the smart trash can monitoring system.The main work of this paper is:Firstly,this paper introduces the application scenarios of the LoRa-based real-time communication system of the Internet of Things,analyzes the research status of its performance improvement at domestic and abroad,and explains the key technical points that affect the communication of the LoRa Internet of Things.Secondly,the overall design ideas and frame structure of the algorithm are described,and the design ideas of the competitive scheduling algorithm based on time division multiplexing are mainly introduced.Combined with actual application scenarios,a comparative experiment is conducted with other communication design ideas at domestic and abroad to prove superiority and reliability of the algorithm.Finally,from three perspectives of system requirements analysis,design and implementation,the smart trash can monitoring system is introduced in detail.The algorithm is successfully applied to the smart trash can monitoring project.And the test plan,parameter requirements and actual application effects are introduced.Experiments prove the good working performance and practical application performance of the system. |