Abstract:

In addition to conventional internet-connected de- vices such as laptop and smartphones, various IoT/IoE de- vices are now connected to networks. Wireless communication technologies in the Sub-1 GHz frequency bands featuring Low Power Wide Area Network (LPWAN) are used for various IoT/IoE devices. Many different radio systems are operating in the same or overlapping license-exempt Sub-1 GHz bands without coordination. Therefore, performance degradation has been observed on IEEE 802.15.4g in environments where IEEE 802.15.4g devices are densely deployed with other interfer- ing devices. IEEE 802.19.3, published in April 2021, specifies the best recommended practices and coexistence mechanisms which enable IEEE 802.15.4g-FSK PHY and IEEE 802.11ah OFDM PHY based systems to effectively coexist in Sub-1 GHz bands. Subsequently, new functions have been specified in the standards, frequency regulations have been updated and new market requirements have emerged. Accordingly, new coexistence mechanisms are needed. This paper describes the status and future prospects of the IEEE 802.19.3a Task Group which was formed in March 2024 and is working towards developing an amendment of the IEEE 802.19.3-2021 standard for higher spectrum resource efficiency and improved network performance. Simulation results under new conditions between IEEE 802.15.4g- OFDM PHY and IEEE 802.11ah-OFDM PHY are presented with simulation parameters discussed in IEEE 802.19.3a Task Group.