Design And Application Of ZigBee Wireless Sensor Network

Wireless sensor network which is the cross of many disciplines has become the new researching hotspot focused by many countries. It has the abilities of information collection, transmission and processing as it includes various technologies, such as sensor, wireless communication and computation. The appearance of the ZigBee protocol with low cost, low power consumption and simple application offers the international standard to wireless sensor network as well as a mass of applications based on micro-control. At the same time it offers the chance to these applications and the development of related industriesAt present, domestic researchers concentrate their attentions on the ZigBee's applications, and there is no public protocol stack. Most applications are based on the development platform offered by Freescale or Microchip company. However, a few of applications have their own hardware, but the software is still based on the API interface provided by Freescale or Microchip.This paper firstly introduces the related knowledge about the wireless sensor network and ZigBee technology, then gives a ZigBee's hardware scheme offered by Freescale and a ZigBee's hardware platform developed on the scheme. After reading and analyzing the ZigBee protocol, this paper describes the design of the PHY, MAC and NWK layers in detail. At last, it validates the feasibility of the hardware platform called MT-ZigBee and the protocol stack by the practical application of the agriculture glasshouse.This research provides a valuable reference to the application of the ZigBee and wireless sensor network. The hardware and stack offer the basic platform to the applications of ZigBee on industry, agriculture, family, environmental monitor and so on, and also supply the basis for the study of the ZigBee protocol.