Design and Implementation of a CDMA-Based Remote Monitoring and Controlling System

摘要

This paper presents the design and implementation of a remote monitoring and control system based on the CDMA2000 1X technology. Nowadays CDMA2000 1X system has added a series of packet equipment to construct the packet network and provide high speed packet data services. The packet network can provide two kinds of Internet accesses: simple IP and mobile IP. The paper adopts the mobile IP technology to carry out Internet access. The wireless monitoring system is a data collecting system using wireless communication technologies. The sensor node acquires data from various types of sensors. Then the central server is equipped with network devices to access Internet and collects the sensor data transmitted through a wireless channel from hundreds of sensor nodes scattered in the service area. The proposed system can be adapted to many types of applications such as industrial and medical remote monitoring systems, security systems, factory automation systems, and remote metering systems. Moreover, it has been put into practice in the oil field on the sea. In practical applications of the monitoring system, the information transferred via the wireless network include such parameters as oil pressure, battery cell voltage, memory capacity, clock and other working conditions. The paper presents the hardware architecture and software structure of the system and analyzes the bit error rate. The results show that the proposed system can meet the locale requirement.