ISO/IEC 17821:2015定义了设备的网络规范，这些设备在IEEE标准802.15.4-2011物理层上运行，能够支持IEEE标准802.15.4e-2012 DSME MAC的信道跳变TDMA链路，以提供低成本的通信网络，允许可靠、确定的延迟和可扩展的无线网状连接。 本国际标准规定了以下内容: -DSME MAC链路控制； -基于非平衡聚类树的网络形成； -定向多级网格连接； -链路路径路由和数据转发； -链接和链接路径维护。

ISO/IEC 17821:2015 defines the network specification for devices, which are operated on IEEE Std. 802.15.4-2011 PHY, capable to support the channel-hopped TDMA links of the DSME MAC of IEEE Std. 802.15.4e-2012, to provide low-cost communication network that allows reliable, deterministic-latency, and scalable wireless mesh connectivity. This International Standard provides the following: - DSME MAC link control; - unbalanced cluster-tree based network formation; - directional multiple grades mesh connection; - link-path routing and data forwarding; - link and link-path maintenance.