杨振 张珣

摘 要：目前物联网智能设备种类繁多，但设备性能缺乏统一标准，对多物联网终端互联与控制造成了一定困难。因此提出MCMI与双路径并发的自动跳频Mesh组网方案，结合用户控制端，设计基于双向Sub-G的无线MESH智能家居控制系统。Mesh结构为3层终端间通信，第一层与第二层构成星形拓扑，第二层与第三层构成多连接树形，较之一般Mesh结构，更加简洁且降低了硬件要求。通过MCMI与双路径并发的信号传输方式，消除了无线网络信道干扰，信号稳定性提高50%。为应对各厂商协议不统一难以成为一个完整系统的问题，设计上层专有协议以克服技术差異化。该系统经过测试，运行稳定、性能优秀、可信赖度高，并且协议还预留自定义接口，拥有一定的拓展能力。

关键词：Sub-G频段;智能照明;Mesh组网;网状拓扑;自动跳频;差分加密

DOI：10. 11907/rjdk. 201176

中图分类号：TP319文献标识码：A 文章编号：1672-7800（2020）010-0209-05

Abstract：There are many types of IoT smart devices on the market today， and there is no certain uniform standard， which has caused some difficulties in the interconnection and control of IoT terminals. This system proposes a scheme of MCMI and dual-path concurrent automatic frequency hopping Mesh networking. Combined with the user control end， a wireless MESH smart home control system based on two-way Sub-G is designed. The Mesh structure in this paper is communication between three layers of terminals. The first layer and the second layer form a star topology， and the second layer and the third layer form a multi-connection tree. Compared with the general Mesh structure， it is more concise and reduces the hardware requirements. MCMI and dual-path concurrent signal transmission methods eliminate channel interference in wireless networks and increase signal stability by 50%。 In order to cope with the inconsistency of the protocols of various manufacturers and become a complete system， a proprietary protocol at the upper layer was designed to solve the technical difference. This system has been tested and runs stably， with excellent performance and high reliability， and the protocol also reserves custom interfaces， which has certain expansion capabilities.

Key Words：Sub-G frequency band; intelligent lighting; Mesh networking; Mesh topology; automatic frequency hopping; differential encryption

0 引言

近年来，随着无线通信技术的快速发展，模块成本大幅降低，物联网和智能家居产业蓬勃兴起，用户对控制系统的品质要求越来越高。建立将智能家居终端连接起来的智能设备组网控制系统，可实现设备点对点或集群控制[1]，提高设备性能。便捷、高效且成本合理的无线组网系统应用价值较大。

在已有研究的基础上，考虑到家庭结构中智能家具设备分布情况，选用穿墙能力和功耗更有优势的Sub-G频段。薛文艳[2]分析无线自组织网络节点发现，可根据路径长度、稳定性、状态寻找一条最优路径，因此将……