In the latest episode of IoT Unplugged, Bertrand Moussel, Chair of the Trusted Connectivity Alliance (TCA) discussed the significance of eSIM technology and the SGP.32 specification.
In the podcast, Moussel spoke about existing machine-to-machine (M2M) and eSIM provisioning architectures, which were initially developed by the GSMA for secure, remote subscription downloads (RSP).
The architectures include one for M2M applications and another for consumer devices, with the former using a ‘push’ model for subscription delivery and the latter employing a ‘pull’ model that allows users download subscriptions directly. While these architectures have seen success, their limitations in constrained IoT devices, such as those with limited user interfaces, power restrictions, or minimal network bandwidth, prompted the development of a new specification, SGP.32, to address these challenges.
The SGP.32 specification aims to support low-power and limited-bandwidth IoT devices that cannot efficiently use the existing architectures. It builds upon proven components from the consumer model but introduces new elements to simplify management for constrained devices. These additions include an IoT Remote Manager (EIM) to handle subscription downloads remotely and a simplified IoT Profile Assistant (IPA) to replace the more complex Local Profile Assistant used in consumer smartphones. This new structure is intended to allow for efficient remote management and service provision for IoT devices without human intervention.
Reflecting on the eSIM market, Moussel highlighted that demand remains strong across various applications, particularly in consumer electronics and verticals like automotive and smart metering, where resilient, secure architectures are essential.
TCA’s own data tracks eSIM technology and has observed an “explosive demand”, according to Moussel, driven by increasing demand for reliable, scalable solutions in M2M and consumer markets. The SGP.32 specification will complement existing architectures, addressing a wider range of IoT use cases and allowing cellular connectivity to support a growing number of devices.
“I think cellular connectivity will grow at a higher speed for the world in which we are working [in] but also living,” emphasised Moussel.
While cellular connections currently represent a small fraction of IoT devices, easing adoption barriers could spur growth. He noted the transformative potential of cellular connectivity in diverse areas, from healthcare to public safety. Emphasising the importance of interoperability, security, and reliability, he said that he saw cellular connectivity as foundational for a connected world, with TCA’s mission focused on ensuring secure, reliable networks for future applications.
To hear more from Bernard Moussel and his insights on the SGP.32 specification, tune into the full podcast episode available on Spotify, Apple Podcasts, and at the link below.
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