Design And Implementation Of Mobile Terminal Application In Tracing System Based On Ubiquitous Search

With the development of information communication technology and wireless sensor network, people are exposed to the ubiquitous network environment. The concept of "ubiquitous" is becoming more and more prominent. The ubiquitous network integrates the Internet, Internet of Things and various network services, gradually penetrate into the daily life of each person with its "omnipresent", "all-embracing" and"omnipotent" features. Internet of things realize the communication between people and people, people and objects, objects and objects on the basis of network interconnection. The ubiquitous search that this article refers to is to search a specific object based on the ubiquitous network and Internet of things, playing people's subjective initiative, integrating into the participatory perception and social networks.In this paper, we design a tracing system based on ubiquitous search,including the mobile terminal application, the server-side and the positioning end to search and locate lost people for specific application scenarios. This paper focuses on the design and implementation of the mobile terminal application. After the comparative study of existing positioning technologies, iBeacon technology is selected to achieve the communication of the mobile terminal and the positioning end, and the reverse application of iBeacon technology is the major innovation of this paper. In this paper, the architecture of the mobile terminal application is summarized as the control module, the iBeacon communication module,the network communication module, the task management module, the local database module, the user information management module and the UI module according to the application requirements. In addition, this paper develops a RSSI preprocessing scheme to solve the problem of server load and improve the reliability of data. Aiming at the situation that users participate in multiple tasks at the same time, a multi-task management and dispatching strategy is adopted proposed to implement the reasonable allocation and the execution of tasks.Firstly, the related research background and current research situation at home and abroad are introduced in this paper. The significance of the research is confirmed and the background of the related technology is introduced. Secondly, the functional and non-functional requirements of the system are studied. After analyzing the system requirements, the overall design of the tracing system based on ubiquitous search is given, and the preliminary design of the mobile terminal is expatiated. At last, the process and function realization of each module are described, and these implementations are tested, which verifies all aspects of performance of the mobile client, and the UI display are finally given. At the same time, this paper also summarizes the whole paper in the last chapter. On the basis of accomplishing the existing functions, this paper puts forward the optimization of the application, so that it can be extended and upgraded later.