智能家居大规模物联网设备“假离线”自恢复系统设计

Design of Fake-Offline Self-Recovery System for Large-Scale IoT Devices in Smart Home

解决设备离线问题是维持无线传感器网络(WSN)稳定性与可靠性的首要任务。目前智能家居系统在网络规模不大且干扰度较低的场景下,设备间联动技术成熟,但在大规模或者环境“恶劣”运行场景下,联动效果不尽如人意。为解决该问题,本文提出了智能家居大规模物联网设备“假离线”自恢复系统设计方案。根据ZigBee网络中各类节点网络行为的不同,分别提出了针对ZigBee router节点和ZigBee end device节点的优化方案。测试结果表明,该方案能够及时将WSN中所有“假离线”设备自动恢复为在线状态;此系统部署后,强电设备离线率由10%下降至1%,弱电设备离线率由8%下降至1%,可极大改善网络设备离线率高的问题。

Solving the problem of device offline is the primary work to maintain the stability and reliability of wire-less sensor network(WSN).At present,in environment where small-scale and low interference,the inter-device linkage technology is mature,but in large-scale or bad environment,the link-age effect is not satisfactory.In order to solve this problem,this paper proposes a design of the fake-offline devices self-recovery system for large-scale wireless network(ZigBee).According to the different network behaviors of different nodes in network,optimization schemes for ZigBee router node and ZigBee end node are proposed.The test results show that the design can make all the fake-offline devices return to online automatically in time.After using this design,the offline rate of router devices decreased from 10%to 1%,and the end devices decreased from 8%to 1%.The quality of network is improved dramatically since the design was implemented.