The Research Of Information Services Technology Based On Bluetooth Transmission

With the development of information society, bluetooth has been widely used in information terminal, especially in multimedia cell-phone terminal. Bluetooth has become an important approach to get personal information, through which, digital media content (including image, music, and video) can be sent to personal information terminal, thus producing huge business value. The increasingly popularization of bluetooth and information service system based on bluetooth will surely promote a brand-new media form.Based on bluetooth communication technology and with bluetooth cell-phone as information terminal, this paper studies the problems of providing information service. In theory, it probes into the concept model of such information service system, specifies the structure of protocol stack, and provides theory for the design and realization of information service system. In practice, by combining self-help terminal and information broadcasting, this paper presents a practical scheme for software and hardware design, realizes two prototype systems, and offers a new idea for developing bluetooth service products.This paper focuses on the following aspects:1. Focused on short-range wireless communication technology, this paper studies the current progress of information service technology which is based on bluetooth, and summarizes current situation from the point of digital media technology development.2. The paper researches the technology features and application fields of bluetooth, and offers digital media content which is suitable for bluetooth transmission, and corresponding file format requirements.3. The paper studies the concept model of information service which is based on bluetooth transmission. It brings forward four-layer concept models, especially emphasizing on communication concept model, and analyzes four logical models of bluetooth information service, namely, "push", "pull", "self-help", and "streaming".4. The paper realizes bluetooth hardware drive and bluetooth protocol layer. Based on BlueZ protocol stack and programmed on Linux operating system, we design the whole protocol stack needed by our information service models.5. The research of realization technology of bluetooch. Combined with practical application demands, designed from the system layer, we realize two prototype systems: "e-space" self-help multimedia terminal and "e-casting" information push station.