基于CC2420与ZigBee的无线多媒体传感器网络通信机制

Wireless multi-media sensor networks based on CC2420 and ZigBee communication mechanism

设计了一种ATmega128L为控制器、CC2420为RF收发器的无线多媒体传感器节点的体系结构。结合Z igBee通信协议栈与多媒体传感器网络自身特点,对IEEE 802.15.4帧格式的部分域进行了全新定义,以适应无线多媒体传感器网络传输数据量大的要求。相对于普通传感器网络的单帧确认模式,给出了一种无线多媒体传感器网络的分组确认的通信机制实现方案,并通过实验验证了该方法的正确性与可行性。结果表明,本方法减少了传输时间和能耗,有效延长了节点生存期。

This manuscript designed a system structure of wireless multi-media sensor, which used ATmega128L for controller, CC2420 for RF transceiver. Based on the ZigBee communication protocol stack and characteristic of WMSNs, redefined the sect-field of IEEE 802.15.4＇ s frame format, in order to satisfy the strict requirement of transmission in WMSNs. Compared with the single-frame acknowledgement mode in normal WSNs, the manuscript proposed a implement scheme of grouping acknowledgement communication mechanism in WMSNs. In the last sensor checking, validated the correctness and feasibility of this method. The results show that this method shortens the time of transmission, reduces the consumption of energy, consequently prolongs the nodes＇ survival time effectively.