Design Of Dynamic Information Sharing System Based On Bluetooth LAN

With the application of electronic equipments becoming more and more widely, the requirement of communication and information sharing between various digital devices is increasing. Because the wired network is not suitable for the communication among mobile devices, wireless communication technology is used in this paper for building LAN. In a variety of wireless communications, Bluetooth has some advantages, such as low power consumption, low cost, strong anti-interference, high mobility and flexible networking features, so the dynamic information sharing system based on Bluetooth LAN is given in this paper.A deep research about the basic principles of Bluetooth wireless communication technology has been done in this paper. Architecture of the Bluetooth protocol stack, data transmission and networking features are also analyzed. Based on this, the project of how to build the system has been given and successfully implemented. There are mainly three steps: Firs, achieve point to point communication system, which is the communication between two devices. The scheme of file transmission designed before has some disadvantages, so after analyzing and improving it, a point-to-point communication system is achieved; Second, design the point-to-multipoint wireless communication system, which forms a LAN by a number of Bluetooth devices: one starts MultiSppServer service, other equipments connect to it. The devices can share resources, including the files'forwarding and massing to multi-devices and regularly updating. Finally, a scheme is given to share the positioning information got by Bluetooth GPS between the devices in the net and updates it regularly, and at last realize the dynamic information sharing system. The function of how to pause and start it as well as free communication between devices is also realized.The experiments show that the dynamic information sharing system based on Bluetooth LAN can achieve the desired results. File can transmit between two devices, and massing and forwarding the file are realized in point to multipoint system. The transmission rate between devices can achieve the requirement of file transmission and the link is stability. The system can get GPS information using Bluetooth GPS, share the information in the network and update it regularly, which achieves the expected effect.