IEEE 802.15.4X:2019

Scope
This standard defines the physical layer (PHY) and medium access control (MAC) sublayer specifications for low-data-rate wireless connectivity with fixed, portable, and moving devices with no battery or very limited battery consumption requirements. In addition, the standard provides modes that allow for precision ranging. PHYs are defined for devices operating various license-free bands in a variety of geographic regions.
Purpose
The standard provides for ultra low complexity, ultra low cost, ultra low power consumption, and low data rate wireless connectivity among inexpensive devices. In addition, one of the alternate PHYs provides precision ranging capability that is accurate to one meter. Multiple PHYs are defined to support a variety of frequency bands.
Abstract
Amendment Standard - Active. Enhancements to the IEEE 802.15.4(TM) smart utility network (SUN) orthogonal frequency division multiplexing (OFDM) physical layers (PHYs) that enable support for data rates up to 2.4 Mb/s are defined by this amendment to IEEE Std 802.15.4(TM)-2015. This amendment also defines additional channel plans, as needed, to support emerging applications.