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21ic
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无线传感网协议栈,从MAC层到应用层的分层优化策略
ZigBee协议采用DSSS直接序列扩频技术,通过将信号能量分散至更宽频带,在-100dBm接收灵敏度下仍能维持1Mbps传输速率。该技术配合CC2530芯片的1.8V-3.6V宽电压设计,使节点在电池供电场景下可实现长达5年的续航。在数据链路层,S-MAC协议引入占空比机制,通过周期性 ...
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