3GPP Release 18 Boosts Stationary IoT

Prior to Release 18, stationary IoT devices followed a rigid network selection process based on pre-programmed priority lists stored on the SIM. This legacy method, designed for mobile phones, often forced a device to connect to a network with a higher priority but weaker signal, leading to connectivity failures and increased power consumption. The new SENSE capability addresses this by allowing the device to factor in the actual signal strength, a critical update for devices deployed in hard-to-reach indoor or remote locations. The development of SENSE was handled within the 3GPP System Architecture Working Group 2 (SA2), which is responsible for the overall architecture of the 5G system. Major infrastructure vendors like Huawei, Ericsson, and Nokia are consistently the top contributors to 3GPP and play a significant role in the technical specifications developed within these working groups. The introduction of SENSE reflects a broader strategic push to optimize cellular technologies for the massive IoT market. Release 18, the first to be branded as "5G-Advanced," was officially frozen in June 2024. Beyond SENSE, this release brings a suite of other enhancements for IoT, including improved support for Non-Terrestrial Networks (NTN) to enable satellite-based IoT, and further evolution of Reduced Capability (RedCap) devices designed for less complex, low-power applications. The standardization of advanced IoT features like SENSE is an area of geopolitical interest, as nations and trading blocs recognize the strategic importance of shaping global communication standards. China, through state-led initiatives, has increased its influence within international standards bodies, a trend that is particularly notable in the development of 5G and IoT standards. Meanwhile, the EU leverages its regulatory power to shape global technology markets. This new mechanism allows a Home Public Land Mobile Network (HPLMN) to pre-configure "Operator Controlled Signal Thresholds" on the device. These thresholds define the minimum acceptable signal quality for a given network technology. If a preferred network doesn't meet this threshold, the device can intelligently search for a network with a better signal, reducing failed data transmissions and minimizing the need for costly manual interventions. The introduction of signal-level awareness is a direct response to the operational costs of managing large-scale, stationary IoT deployments. Frequent "truck rolls" to manually reset or reconfigure poorly connected devices are a significant expense for enterprises. By making more intelligent network choices autonomously, devices with SENSE can significantly improve reliability and reduce long-term operational expenditures. Looking ahead, discussions for 3GPP Release 19 and 20 are already underway, with a focus on further expanding IoT capabilities. Key areas of exploration include support for "Ambient IoT," a class of ultra-low-power or even battery-less devices that harvest energy from their environment. These future releases will continue to build on the foundation laid by Release 18 to support a more diverse and massive ecosystem of connected devices.