Can nb-iot technology self-organize network and what is it composed of

NB-IoT is an operator-led network that operates on authorized frequency bands, while LoRa operates on open frequency bands, which can be independently constructed by enterprises. NB-IoT is built on a cellular network and only consumes about 180KHz of bandwidth. It can be directly deployed on a GSM network, UMTS network or LTE network to reduce deployment costs and achieve smooth upgrades.
　　Development advantages of
　　NB-IoT : NB-IoT has four major characteristics: First, wide coverage, which will provide improved indoor coverage. In the same frequency band, NB-IoT has a gain of 20dB over the existing network, which is equivalent to an increase of 100 times. The ability to cover the area; the second is the ability to support connections. One sector of NB-IoT can support 100,000 connections, supporting low latency sensitivity, ultra-low equipment costs, low equipment power consumption and optimized network architecture; three It is lower power consumption, the standby time of the NB-IoT terminal module can be as long as 10 years; fourth is the lower module cost, the company expects a single connected module to not exceed 5 US dollars.
　　NB-IOT focuses on the low power consumption and wide coverage (LPWA) Internet of Things (IOT) market, and is an emerging technology that can be widely used worldwide. It has the characteristics of wide coverage, multiple connections, low speed, low cost, low power consumption, and excellent architecture. NB-IOT uses the license frequency band and can adopt three deployment methods: in-band, guard band, or independent carrier, to coexist with existing networks. [4] Because NB-IoT has its own advantages of low power consumption, wide coverage, low cost, large capacity, etc., it can be widely used in a variety of vertical industries, such as remote meter reading, asset tracking, smart parking, smart agriculture, etc. .
　　Can nb-iot technology self-organize network?
　　Based on LPWAN technology, NB-IOT has the characteristics of wide coverage, high speed, low cost, large access volume and low power consumption. Its obvious advantage is that the data can be directly transmitted to the cloud platform after data collection, without the need for a gateway, which greatly simplifies On-site deployment. The planning goal of NB-IOT can meet the in-depth coverage of indoor meter reading. Considering that the cost of NB-IOT's independent network construction is high, its software and hardware support LTE. The current network adopts the idea of ​​joint planning: NB-IOT is planning and building based on the LTE target network , Deploy NB-IOT step by step on the existing LTE planning site to achieve different coverage capabilities. The ratio of the number of NB-IOT and LTE sites in the main experimental networking scheme is 1:1, 1:2, 1:4, 1:8 and 1:9. At present, 1:1 and 1:4 networking schemes are mostly adopted in the network. If the scale ratio of NB-IOT to LTE base station is 1:1, it can further enhance the in-depth coverage and capacity improvement of NB-IOT, and can have a high penetration loss of 37dBm, which is conducive to the realization of underground meter reading and parking services.
　　The NB-IOT network consists of the following units:
　　1. Core network
　　In order to send IoT data to applications, Cellular Internet of Things (CIoT) defines two optimization solutions in EPS: respectively:
　　CIoT EPS User Plane Function Optimization (User Plane CIoT) EPS optimisation)
　　CIoT EPS control plane function optimization (Control Plane CIoT EPS optimisation)
　　For CIoT EPS user plane function optimization, the Internet of Things data transmission method is the same as the traditional data flow. The data is sent on the wireless bearer, which is transmitted from the SGW to the PGW and then to the application server. Therefore, this scheme will generate additional overhead when establishing a connection, but its advantage is that the data packet sequence is transmitted faster.
　　This scheme supports IP data and non-IP data transmission.
　　For the optimization of the CIoT EPS control plane function, the uplink data is transmitted from the eNB (CIoT RAN) to the MME, where the transmission path is divided into two branches: or transmitted through the SGW to the PGW and then transmitted to the application server, or through the SCEF (Service Capability Exposure Function) is connected to the application server (CIoT Services), which only supports non-IP data transmission. The downlink data transmission path is the same, but the direction is opposite. This scheme is very suitable for the transmission of infrequent small data packets.