NB-IoT Things module chip models used As we all know, basically concentrated in the Huawei Hass, MediaTek (MTK) and violet show sharp (RDA) three. But the market is far more than the three-chip manufacturers, as well as the following manufacturers:
So far, Hass regarded NB chip industry started relatively early, more compatible chips, especially with the early Hass chip more perfect home beautiful home for all aspects of smart cities, smart home and so on. Branch joint production of NB-IoT intelligent modules, binding Hass NB chip, providing customers with the perfect solution. Advice please add the letter V: yx5105
About NB-IoT, take a look at the classic answer these questions:
Q 1: NB-IoT applications for vertical scenarios What? 
Question 2: What is the cost of deploying NB-IoT vertical field of applications?
A: NB-IoT vertical application areas deployment costs include hardware costs, network costs, installation costs, service costs. To achieve large-scale applications, it is necessary to reduce deployment costs.
Question 3: vertical application areas of concern NB-IoT Where?
Answer: NB-IoT technology to meet the low-power, long standby, deep coverage, large capacity has the desired low-rate services, more suitable for static business, low sensitivity to delay, non-continuous movement, the real-time service data transmission scenario.
Independent exception reporting service type: detectors such as smoke alarms, and other device is not working, an extremely small amount of uplink data (on the order of ten bytes), a multi-cycle year, month units.
Self-report business cycle types: such as remote meter reading, environmental monitoring, public utilities and so on, up a small amount of data (on the order of one hundred bytes), multi-cycle in days, in hours.
Remote control instruction service types: apparatus remotely turn on / off, the trigger device transmits an uplink report downlink very small amount of data (on the order of ten bytes), to multi-day period, in hours.
Remote software update service type: as a software patch / update, the uplink and downlink needs a larger amount of data (the order of kilobytes), to multi-day period, in hours.
Q4: China's NB-IoT industry can get rid of dependence of foreign systems?
A: The future LTE from the high-speed and low-speed in both directions to 5G evolve to meet the diverse needs of networking applications, and promote the industry to flourish upper application. NB-IoT things in a low-speed, low-cost areas to provide communications support to meet the needs of different market segments.
In the complex aspects of the application unmanned, VR, remote surgery and other high transmission bandwidth requirements, and requires a great amount of data transfer scenarios ultra-low latency, network technology put forward new demands, only to 5G large-scale deployment can be achieved these things complicated scenarios.
The development of networking industry tend to be flat, and China's technology market and will become synchronized global industrial chain, and ultimately all things Internet.
Question 5: Comparison NB-IoT technologies and other low-power WAN?
Q 6: NB-IoT module also needs sim card?
A: It should be noted that the current development of NB-IoT chip, network operators still need support, need sim card.
In other words, NB-IoT network module requires licensing requirements in each country. SIM card and IMEI numbers need to be bound.
Q 7: NB-IoT TDD LTE standard will support it?
A: Currently, FDD LTE system supports NB-IoT technology, the current TDD LTE system does not support NB-IoT technology.
NB-IoT most physical layer design follows the LTE system techniques, such as using the uplink SC-FDMA, a downlink using OFDM. High-level protocol design follows the LTE protocol, functional enhancements for its small packets, low-power and high connectivity features. The core network based in part on S1 interface, support for independent deployment and upgrade deployment in two ways.
Q 8: NB-IoT support base positioning it?
A: R13 is not supported by the base station location, but the network operators can make private schemes, such as cell ID based positioning, it will not affect the terminal, only need to increase the network location server and link to the base station.
R14 plan to do positioning enhanced to support E-CID, UTDOA or OTDOA, operators want to target positioning accuracy is within 50 meters.
Considering the complexity of the angle from the terminal, UTDOA better, because almost no effect on the terminal, and the cover (basement 164dB), UTDOA (upstream) where lower power dissipation enhancement; enhanced if need not cover most of the scenes, from the network capacity point of view, OTDOA (downstream) would be better.
Q 9: NB-IoT deployment options?
A: NB-IoT supports three different deployment options, which are independent of the deployment, the deployment of the protective tape-band deployment.
Independent deployment: you can utilize separate frequency bands, suitable for Chonggeng GSM band.
Deployment guard band: the LTE system may use unnecessary band edge.
Deployment band: use of any resource block may be an intermediate carrier LTE.
Q 10: NB-IoT uses what modem technology?
A: The use of a downlink OFDMA, subcarrier spacing of 15kHz. Using the uplink SC-FDMA, Single-tone: 3.75kHz / 15kHz, Multi-tone: 15kHz. Only support half duplex, single synchronization signal. Terminal support an indication for Single-tone and Multi-tone capabilities. MAC / RLC / PDCP / RRC layer processing related optimization process and based on existing LTE protocols, the physical layer.
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NB-IoT \ 4G \ 5G \ WIFI
and other intermediate device module
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