Day: March 23, 2019

Narrow Band LTE- NB-IoT

March 23, 2019

NB-IoT or NB-LTE is a new 3GPP radio-access technology. It is not fully backward compatible with existing 3GPP devices however it is designed to achieve excellent co-existence performance with legacy GSM, GPRS and LTE technologies. NB-LTE requires 200 kHz minimum system bandwidth for both downlink and uplink, respectively. The choice of minimum system bandwidth enables […]

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NB-IoT Frequency Bands (As per 3GPP Rel. 13, 14 and 15)

March 23, 2019

3GPP has defined a set of frequency bands for which NB-IoT can be used. 3GPP TS 36.101  from Release 13 provides the list of the supported bands: 1, 2, 3, 5, 8, 12, 13, 17, 18, 19, 20, 26, 28, 66 and Release 14 added the bands: 11, 25, 31 and 70. Later, 3GPP Release 15 […]

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Narrow Band IoT Frame Structure

March 23, 2019

NB- IoT frame structure is illustrated in the below picture.  At the highest level, it starts with a hyperframe cycle where one hyperframe cycle has 1024 hyper frames and each consisting of 1024 frames. One frame consists of 10 sub-frames and each subframe is dividable into two slots each of 0.5 ms which is similar […]

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Narrow Band Synchronization Signals (NPSS and NSSS)

March 23, 2019

The NPSS and NSSS helps UE to synchronize downlink to an NB-IoT cell. These are transmitted in certain subframes based on an 80-ms repetition interval. By synchronizing to NPSS and NSSS, the device will be able to detect the cell identity number (NB-IOT PCI). NPSS and NSSS are designed to allow  devices to use a […]

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Narrow Band-Physical Broadcast Channel (NPBCH)

March 23, 2019

NPBCH stands for narrow band physical broadcast channel similar to PBCH in LTE Technology. The NPBCH is used to deliver the NB-IoT Master Information Block (MIB), which provides essential information for the NB-IOT UE to operate in the NB-IoT network. NPBCH uses a 640 ms TTI, but within the TTI only subframe 0 is used […]

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Narrow Band-IOT UE Attach Call Flow Messaging

March 23, 2019

When a NB-IOT UE accesses a cell, it follows the same principle as for LTE: It first searches a cell on an appropriate frequency. Decode NPSS and NSSS for NCellID. After decoding NCellID, UE decode the NB-MIB Information transmitted over NPBCH, but there it can get to know NB-LTE deployment mode i.e. In-band, Guard-band or Standalone, the schedulingInfoSIB1, […]

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Cat. NB1 and Cat. NB2 Devices Comparison

March 23, 2019

Narrow Band IoT specifications was first introduced in 3GPP release 13 and then further enhanced in 3GPP release 14 with some essential features. Release 13 NB-IoT device category is referred as Cat NB1 or Cat N1 and Release 14 devices are referred as Cat NB2 or Cat N2. Parameter Cat. NB1 Cat. NB2 3GPP Release […]

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IoT Device Battery Life 10 Years !!! How is it possible? Battery life Calculation for NB-IoT Device

March 23, 2019

Energy is the most scarce resource for an electronic device and when someone designing it, he needs to optimize its operation so that it consumes minimum power. When a device has a regular power supply along with the battery backup, one will not be worried but in the case where the device has an only battery as […]

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Narrow Band (NB) -IoT Modem Chip Vendors

March 23, 2019

There are a number of wireless technologies available for the Internet of things. These are mainly divided into two categories: Short Range (Zigbee, WiFi, Bluetooth, Z wave) Long Range (LoRa,SigFox, NB-IoT ) NB – IoT refers to the technology of the narrowband Internet of things a cellular IoT technology developed as part of 3GPP Release […]

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Samsung’s Exynos i S111 a New NB-IoT Modem

March 23, 2019

Samsung, the world leader in semiconductor and telecommunication has announced its new narrowband IoT (NB-IoT) chipset modem named as Exynos I S111. Exynos I S111 is an LTE modem integrated NB-IoT solution that delivers a reliable wide range communication with ultimate power efficiency for lower data rate IoT application. This device includes Modem, RF IC, CPU, […]

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