The Research And Implementation Of The Gateway Of ZigBee Based Wireless Sensor Network

With the rapid development of our national economy, wireless sensor network is becoming more important in scientific research, environment detection, daily life and so on. In recent years, because of its character of low power consumption, high self-healing ability etc, ZigBee technology, raised for low-rate wireless communication, is widely used in wireless sensor network and becomes a research focus.In some circumstance like smart home, it is a demand to expand network or to monitor the network remotely, and embedded Internet is the best choice. As a part of the whole Wireless Sensor Network System, this paper designed and implemented the gateway between Internet and ZigBee.Based on ZigBee solutions provided by TI company, and analysis of popular embedded Internet technology,taking cost,demand into account,this paper designed a ZigBee based gateway solution:Taking MSP430FG4618 as MCU, connecting Internet and ZigBee network individually through CS8900A and CC2420. MCU circuit,Internet interface circuit,Auxiliary circuit and CC2420 RF module are made. Transplanting embedded Internet, implementing ARP,IP,ICMP,TCP protocols and Z-Stack, This paper also setup a ZigBee node. After analyzing the implementation of TCP/IP and Z-Stack, this paper raised the gateway protocol model of ZigBee based wireless sensor network which mean to run two protocols in one simple MCU, and programmed in embedded C to exchange packet on the application layer.In the end, a process programmed in VC.net in the way of Windows Sock is used to test gateway system's communication between Internet and ZigBee. Through debug and test, this gateway system could satisfy the requirement, implements the connection between Internet and ZigBee simply and also provides a new idea for the next.