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Power Save Mode (PSM)

Main purpose of PSM

To decrease the data usage on your device and to extend battery life.

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eDRX

With the advent of IoT, the need to connect devices with networks has increased exponentially. However, these devices are deployed in remote areas with no wireless coverage.

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NB-IoT Frequency Bands

NB-IoT is an enhanced narrowband data transmission protocol designed for IoT devices. The NB-IoT protocol is optimized to deliver lower data rates but with improved security and longer battery life.

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LTE-NB: RRC

The uppermost layer on the control plane of the access stratum is radio resource control (RRC) (AS). It also transports non-access stratum (NAS) messages, which are positioned above the RRC layer. The RRC layer contains a number of information components that make up system information.

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Security Features of LTE-M and NB-IoT

Any cellular connection begins with a SIM card. Because a SIM card is a chip, you can store data on it. It contains information that helps cell towers recognize the card and know to whom it belongs.

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MIBs and SIBs

The Master Information Blocks (MIBs) contains the most important and often communicated system information.

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NB-IoT NPDSCH

The NPDSCH channel transports unicast data from an eNB (base station) to an NB-IoT device.

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NB-IoT NPDCCH

The NPDCCH is used to carry DCI (Downlink Control Information).

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NB-IoT DMRS

Demodulation Reference Signal (DMRS) is always linked to NPUSCH.

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NB-IoT NRS

Narrowband Reference Signal (NRS) is used for cell search and initial system acquisition. It's utilized to allow the device to estimate the downlink channel.

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NB-IoT NSSS

The Narrowband Secondary Synchronisation Signal (NSSS) provides time and frequency synchronisation of user equipment in a cellular network.

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NB-IoT NPBCH

NB-IoT Physical Broadcast Channel (NPBCH) is used to carry MIB information to the device in the downlink by eNB (base station).

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NB-IoT RACH Procedure

The NB-IoT RACH procedure is a lower power state, where it can conserve its battery life by entering idle mode. The NB-IoT RACH procedure is based on the IEEE 802.11ah standard.

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NB-IoT NPSS

The Narrowband Primary Synchronization Signal (NPSS) is transmitted continuously at the lowest possible power level.

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NB-IoT Synchronization Signals

The NB-IoT Synchronization Signals are used for synchronization between the distributed systems. It includes the synchronization of the data packets.

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