功能模块分离的无线传感器网络节点设计

Design of function-modules separated node in wireless sensor network

摘要:

不同ZigBee联盟成员开发应用层框架通常运行于各自指定的微处理器芯片上。由于各联盟成员的ZigBee技术细节不同，导致设计和使用及日常维护ZigBee网络时会发生兼容性问题。为此提出了一种将ZigBee节点上测控部分和通信部分分离为独立模块的思想，可以使ZigBee节点的开发和维护更加灵活和便捷。设计以Microchip的开源ZigBee协议栈和PIC18F4620单片机为实验平台，研究开发了测控和通信两模块间的控制协议，并完成了实际测试试验。实验结果表明，功能模块分离式的设计能充分发挥测控部分的硬件资源优势，减少对协议栈单片机的资源占用，提高了网络节点的兼容性和日常维护和升级的便利性。

Abstract:

Usually different member of the ZigBee Alliance develops different application layer framework which runs on the specified Micro Control Units(MCU). This may give rise to compatibility problems frequently happening in the design，application and routine maintenance in ZigBee network，because the technical details of each member are different. A new idea is proposed，which separates the measurement and control module from communication module in a ZigBee node，and makes it easy and convenient to develop and maintain ZigBee node. Based on the open source ZigBee stack of microchip and the experimental platform of PIC18F4620 microcontroller，control-protocol between the two modules is developed and tested. Testing results indicate that the design of separated function modules can make full use of hardware resources of measurement and control module，reduce the resource consumption of ZigBee-Stack MCU，and can improve the compatibility and routine maintenance of the network node.