From the course: NB-IoT (Narrowband IoT) Engineering: Deployment, Configuration, Call Flow Analysis
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Fallback option: data over SMS
From the course: NB-IoT (Narrowband IoT) Engineering: Deployment, Configuration, Call Flow Analysis
Fallback option: data over SMS
For many IoT sensors, their entire job is to send a tiny periodic status update. Does it make sense for these simple devices to go through the full process of establishing a data bearer with all the signaling overhead that entails just to send a few bytes? What if there was a more effective way designed specifically for small data transfers, and that is attached without PDN connectivity. This feature allows IoT device to register with the network without automatically establishing a default data bearer. This is a fundamental shift from how smartphone connect. The device attach for the core network mobility management and SMS service, but it does not request an IP address or data path to the Internet at that time. Looking at the network architecture, this means the device communicates directly with the MME, which is mobility management entity in the core network for control signaling part. For data transfer, it uses SMS-based data transfer over NAS, non-access stratum. This allows…
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