Application And Research Of WSN Based On WCDMA

Wireless sensor network is a research hot spot. A large number of sensor nodes, distributed randomly to form the network wirelessly, get various physical parameters and upload these data to the data management center. In order to meet the requirements of remote management, data management center can connect sensor network with Internet through wire. If the data can not be routed through wire in some cases, GPRS and CDMA can be used in remote Internet wireless connection. China 3G network commercializes on the January 7, 2009. 3G wireless remote data transmission becomes a research focus in industrial applications, and will play an important role in wireless sensor network.The paper designs and implements the application platform integrating 3G and wireless sensor network. As the 3G network construction has just begun, the learning materials about 3G is relatively small. The paper researches remote data transfer features in 3G and realizes 3G wireless data transmission by referencing the application experience in GPRS. And it implements power amplifier circuit designed by two parallel power amplifier modules in wireless sensor network. It improves the communication distance and enhances ZigBee wireless sensor network application.The paper uses the most mature WCDMA 3G standard as the transmission network. EM770W is a WCDMA module which is manufactured by Huawei inc. in 2009 and it is the most important innovation. In this paper, EM770W is divided into a separate module according to the hardware component thinking. Firstly, it achieves the basic USB host functions and describes the USB host communication. Secondly, it provides the function interface about TCP/IP in EM770W, including connection establishment, data transmission, and connection closure.In ZigBee two parallel power amplifier module includes power amplifier and low noise amplifier. The design of hardware is difficult. ZigBee is divided into a separate module too. And the paper designs the extension interface in ZigBee. Each function is programmed independently in the software package. Users only need to achieve expansion interface modules, without caring for the underlying complex antenna circuit and the driver program.In the design of wireless sensor network platform, the system applies component thinking, and can serve as a continue development platform for advanced engineers. It has been applied to the LED intelligent lighting system. Hardware and software work stably and reliably. It has research significance and reference value for 3G.