Research And Design Of Internet Of Things Resource Access System

With the rapid development of the Internet of Things technology,people's daily life is gradually becoming intelligent and informational,and the foundation supporting the application of the Internet of Things is the information collection of Internet of Things resources.For the IoT resource access system,we expect it to receive and process more IoT information within a certain period of time,reducing consumption and improving efficiency.This article analyzes the large connection and high concurrent access requirements of IoT resources,and designs a set of IoT resource access systems.The main work and contributions include the following three aspects:(1)Design a multi-level,highly concurrent IoT resource access system framework.A resource description and mapping method is designed,and the raw data is converted into observation data with practical significance by binding the resource entity and the protocol.On this machine,the self-matching of IoT resource connection and message mode is implemented concurrently,preventing data pollution.For large-scale IoT resource access,a multi-service node collaboration and task dynamic allocation mechanism is designed to ensure high concurrency of the system.(2)Design and implementation of self-adaptive and self-assembled IoT access protocol stack.The IoT resources are heterogeneous,and different protocols are used at the physical layer,network layer,application layer and other layers to access the system.This article refines the protocol stack structure suitable for the Internet of Things resource access.With this structure,users can customize of each layer of the protocol stack or perform secondary development,and the system completes the automatic identification,loading,and assembly of the protocol stack.The multi-layer protocol stack can automatically combine the protocol stack according to the message to complete the self-adaptation of the Internet of Things resource access.The system implements hot-plugging functions of dynamic access,deletion,and no downtime.(3)Design of the uninterrupted service guarantee mechanism for the service cluster of the Internet of Things system.Based on the internal forensics technology,real-time monitoring and analysis of the running status of the front-end thread of the server node is realized,the abnormality of the front-end thread is quickly found,and the switching of the service node is triggered.This paper proposes an improved load balancing algorithm that takes into account factors such as CPU and memory of service nodes.In order to prevent packet loss and packet loss during service node switching,a hierarchical design of message queues is adopted,and protocol data packet shared storage and on-demand scheduling and distribution mechanisms are proposed to ensure lossless reception and orderly processing of protocol data packets.An intermediate state description table for the IoT protocol was designed,and the method for updating the intermediate state of the protocol communication process was analyzed to implement state migration.The system has been applied to the important national science and technology infrastructure in the "13th Five-Year Plan"-High Precision Ground-Based Time Service System(GTSS),which initially meets the needs of project resource access and information collection.