Talk:Narrowband IoT

Please don't delete. This is a new technology that is being standardized by 3gpp standards body. very little information is available publicly. this article will be enhanced as soon as we get public info.

All Advertizing Lingo
Even new things, ununderstood, ought to be explained understandably or left out. This is a blurp of advertizing statements and should rightly remain shaded. Example: "Narrowband" in the name – and you don’t even mention the bandwidth! Then: "It is also suitable for the re-farming of GSM spectrum": "Narrowband IOT (use regular spelling please) takes just 180 kHz of bandwidth, the same as classic GSM, so it can be used on free GSM channels or within an LTE channel." Then the fact that it "focuses". It doesn’t, it sends its radio beams all around or at an angle of, say, 120°. Advertizing focuses, technology does something or it doesn’t. Future hopes remain for the future. In the (unexplained) table please highlight the NB1 column, because that’s what we are speaking about, and let readers know that apparently all this focussing is by trading off latency (up to 10s) and data rates (down to 20 kbps). There’s no free ride in technology. And if it says "low power", can this please be made visible? "Device transmit power" looks very alike to me across the table. I researched an example that mentioned 10.4 µA at "power saving" and 1.99 mA at standby. Is that little? I’m not even sure if I picked a correct example; so experts please step forward and compare to prove or at least to plausibilize. – Fritz Jörn (talk) 18:11, 14 November 2017 (UTC)

Downlink Peak Rate is too high. Lets calculate it in this way: REL13: 1TTI NPDCCH + k0=0 i.e. 4TTIs (minimal gap between NPDCCH and NPDSCH) + 3SF (680 bits) of NPDSCH + k0 i.e. 12TTIs+2TTI (NACK/ACK) = 1+4+3+12+2+3=25 TTIs due to the fact that minima search space Rmax*G is 8TTIs next transmission can be scheduled every 32 TTIs. Thus, max throughput (MAC layer i.e. PDU) is 1000/32*680 = 21 250 bps

REL14: 1 HARQ process: 1TTI NPDCCH + k0=0 i.e. 4TTIs (minimal gap between NPDCCH and NPDSCH) + 10SF (2536 bits) of NPDSCH + k0 i.e. 12TTIs+2TTI (NACK/ACK)+3TTIs(mandatory gap) = 1+4+10+12+2+3=32 TTIs due to the fact that minima search space Rmax*G is 8TTIs next transmission can be scheduled every 30 TTIs. Thus, max throughput (MAC layer i.e. PDU) is 1000/32*2 536 = 79 250 bps

2 HARQ process: 1st HARQ 1TTIs NPDCCH (AL1) +4TTIs (minimal gap between NPDCCH and NPDSCH) + 8SF (2024 bits) of NPDSCH + k0 i.e. 12TTIs+2TTI (NACK/ACK) + 3TTIs(mandatory gap) = 1+4+8+12+2+3=30 TTIs 2st HARQ 1TTIs NPDCCH (AL1) +12TTIs (minimal gap between NPDCCH and NPDSCH) + 10SF (2536 bits) of NPDSCH + k0 i.e. 12TTIs+2TTI (NACK/ACK) + 3TTIs(mandatory gap) = 1+12+10+12+2+3=40 TTIs due to the fact that minima search space Rmax*G is 8TTIs next transmission can be scheduled every 30 TTIs. Thus, max throughput (MAC layer i.e. PDU) is 1000/40*(2536+2024)= 114 000 bps

3GPP TS 36.213 chapter 16.

NB-IoT's ability to penetrate buildings allows sufficient range through many objects and walls, therefore NB-IoT displays can be used indoors.
NB-IoT enables PDi-Digital Displays to communicate with the sepioo IoT Platform without any Infrastructure, therefore no unforeseeable project start-up costs can appear. In order to bring a new Digital Display online, it´s only required to insert a NB-IoT Simcard and add it to the sepioo IoT Platform (Plug & Play). This directly leads to the advantage of fast and easy scalability of your business.


 * No Infrastructure
 * Plug & Play
 * Scalability
 * High building penetration

sepioo D12.2 NB-IoT Dimensions (mm): 219.9 × 264.8 x 15/ 33.5 (indoor/outdoor) Active display area (mm): 189.4 ×  236.9 Pixel colors: Black/white Battery lifetime: Rechargeable Encryption: 128-bit AES with secure key exchange

https://www.pdi-digital.com/iiot-technology/digital-displays/ 2601:406:8401:1CE0:81A2:2D97:F4E6:AB09 (talk) 18:31, 25 April 2023 (UTC)