Research On Application Architecture And Key Technologies Of Agricultural Internet Of Things

In recent years,with the rapid development of wireless communication technology and sensor technology,Internet of Things is widely applied in the Agricultural industry,forming Agricultural Internet of Things(AIoT).Overall,the Internet of Things in agriculture is still in its infancy,on the one hand is the underlying sensing devices are diverse,and have different interfaces,furthermore,there are many different kinds of communication protocols,all these factors resulted in the lack of a common upper control software that can configure and control the underlying hardware equipment flexibly and conveniently.On the other hand is the AIoT industry systems are mainly researched and developed vertically,due to the platform architecture’s closure,high coupling and poor scalability characteristic,it is difficult for the data sharing and service coordination between enterprises thus formed many “information islands”.According to the above background and problem,we put forward five layers agricultural network architecture,and focus on the key technologies,eventually make the established system conveniently integrate the underlying heterogeneous sensor networks,further reduce the threshold for application development of agricultural Internet of Things,at the same time ensure that the upper application system keep the distributed,loose coupling and large-scale deployment characteristics.Main work and research conclusions are as follows.(1)Putting forward five layers agricultural IoT application architecture.In view of the traditional Internet of three layer structure can’t satisfy for the Internet of Things in scalability,extensibility,modular and interoperability requirements,by comparing the domestic and foreign research institutions and researchers have proposed a variety of different forms of system structure,this paper gives the building principles of AIoT system architecture,and further precisely define each component of the system and the relationship between them,determine the general frame and function structure model,and finally put forward that the five hierarchical architecture model and its corresponding protocols comprises the Agricultural Internet of Things system architecture.This architecture can be used to guide the application developers to follow the principle of hierarchy to implement system,makes the final build system meets the expected demand.(2)Unified heterogeneous network access system was designed and implemented for the Agricultural Internet of Things.Due to the AIoT is still in its infancy at present stage,the market has a variety of different communication protocols agricultural IoT systems.Each manufacturer has its own types of equipment,communication protocol,and a different communication standard interface,so the data’s interconnection among different systems is difficult.Therefore research the common gateway to support heterogeneous protocols transformation is necessary.The paper design the unified access layer system for the AIoT,and introduces its various features in detail,finally set up related hardware and software platform for testing,the experimental results show that the designed agricultural network access layer gateway is stable and reliable.Through the use of access gateway,Internet of Things of agriculture developers will have more energy to focus on business logic,without too much attention to the underlying hardware equipment integration problems.(3)Researched the Service-oriented AIoT data sharing scheme.The current agricultural Internet of Things business platform are fragmented,vertical and heterogeneous,makes the enterprise data sharing and service coordination difficult and forming many “information islands”.How to deal the data generated in agricultural production,to provide users with navigation,data query and data distribution,data acquisition,data download,data consulting and other shared services,increase the reusability of basic data service,reduce agricultural iot upper application build threshold,is the basic goal of agricultural iot data sharing design,is also the fundamental aim of data sharing service system for agriculture iot.Based on the heterogeneity among agricultural iot systems and information sharing requirements,the service-oriented data sharing scheme for agriculture iot is designed,take edible fungus production environment monitoring for example,this paper introduces the determination of the business process and design,finally designs and realizes different granularity of services,through the combination and reuse of different granularity services,improve the data sharing degree of agricultural Internet of Things.(4)Researched the underlying wireless sensor network clustering routing algorithms.Wireless sensor networks(WSNs)as the key techniques for agricultural environment monitoring,has the incomparable advantage over traditional monitoring network,due to the perception node’s energy limitation,however,make some nodes close to the base station die and leading to the monitored areas data acquisition failure,therefore how to enlarge the survival time of the network as far as possible to ensure that the monitoring system work effectively for a long time,is the primary goal of the wireless sensor network routing protocol design,and is also the core problem for wireless sensor network applied to the agricultural environment monitoring.In view of the traditional LEACH routing algorithm assumes that sensor nodes continuing to send data to the cluster head nodes,Cluster head nodes are always directly communicate with the base station’s problem,the paper put forward energy efficient clustering routing protocol algorithm based on event driven,and finally using OMNET++ simulation experiment to evaluate the performance of the proposed algorithm,the experimental results show that the proposed algorithm can effectively solve the network energy consumption imbalance problem,and prolong the network life cycle.