Wireless sensor networks (WSN) is composed of large number of sensor nodes which are deployed in monitoring region, it is forming a multi-hop and self-organized network system through wireless communication, the information of monitored area is cooperatively sensed, collected and processed. WSN can be applied in medical treatment, environment chi flat iron monitoring, and minitary area.Zigbee technology is a unified technical standard for short-range wireless communication technologies. Zigbee protocol stack is composed of Physical layer, chi hair straighteners layer, network layer, security layer and application layer. IEEE802.15.4 protocol defined the Physical layer and MAC layer, Zigbee Alliance developed the network layer and security chi dazzle layer. The development of application layer should be based on the user's own needs. Zigbee technology is a standard wireless network protocol designed for low-rate sensor and control network; meanwhile, it is the most suitable standard protocols for wireless sensor networks.Currently, wireless sensor network research is still in its infancy. Performances of small number of commercial products are still far from the lace wedding dresses actual demand. In this paper, we designed a cluster tree network topology monitoring system based on Z-Stack, a kind of ZigBee protocol stack yeiled by Texas Instruments. This system will be custom made prom dresses pratically used in a tobacco warehouse.This paper includes:First, Introduced the concept of wireless sensor networks, characteristics andarchitectures, made brief introduction of IEEE802.15.4 protocol, and then foucoused on the sub-level ZigBee protocol.Second, Analyse the demand of monitor sysytem for tobacco warehouse, then given the idea of system design, achieved 2.4GHz blog lace wedding dresses hardware circuit design. Tird, I made a deep analysis of Z-Stack working principles. Include the new wedding dresses establishment of processes of cluster tree topology network, distributed network address allocation, self-healing routing algorithm. Finally: Designed a wide range of experiments, the results verifyed the design meets the basic requirements of monitor system.
sianrch
lulilu
sling
Sense
SMOOTHY WIND
http://www.lottalottos.com
http://www.dynare.org/phpBB3
http://www.webmarketingforum.it
