The Design And Implementation Of Service Gateway Interface Subsystem In Internet Of Things

As a kind of new technology, the Internet of Things is the key of the development of information technology in the future. It has achieved the attention of the whole world. The major telecom operators in our nation have devoted themselves into the design and construction work of Internet of Things architecture. In order to implement the communication functions of the various platforms or systems in the Internet of things, we need to add a communicational equipment to connect these platforms and systems. We call it Service Gateway Device of the Internet of Things.The Service Gateway Device is a critical communications equipment in the network architecture of the Internet of Things. Because various network elements are connected through this Service Gateway Device to complete communication, and then the basic communication functions, intelligent channel functions, integrated service functions and ability calling functions between various network elements can be achieved. In order to connect with platforms, systems and terminals in the Internet of Things, the Service Gateway need many interfaces to connect and communicate with external network eqipments directly, and these interfaces have make up the Service Gateway Interface Subsystem.This paper describes the design and implementation of Service Gateway Interface Subsystem in detail. Interface Subsystem is an important part of Service Gateway System. It provides many functions for the platforms, systems and terminals in Internet of Things, such as connection management, communication access, protocol conversion, authentication, load distribution and so on. Moreover, it can submit some messages to the service logic processing subsystem of the Service Gateway to complete service processing. Interface Subsystem is the key subsystem to realize communication between Service Gateway System and external network elements, and it has broad application prospect.The paper describes the related technologies such as the Internet of Things and its Service Gateway, and basic knowledge about CIN-SCF platform. The paper analyzes the functional requirements and performance requirements of the Service Gateway Interface Subsystem of the Internet of Things. The core part of the paper is the design of Service Gateway Interface Subsystem; First it introduces the the system environment of Interface Subsystem, then the paper describes the static structure of Interface Subsystem, specific method of dynamic structure design and the detailed design of function modules. At the same time it focuses on the key issues about the load distribution methods, communication efficiency of Radius protocol and WMMP protocol code methods.At the end of the paper, the author summarizes the project practice during the period of master, and prospects the development of Interface Subsystem and the whole Service Gateway System.