The temptation of 5G era, like the smell of the kitchen next door, drifts intermittently, stimulating everyone's nerves. For industry, however, this odor signal is too weak. Before 2020, there was no hope that 5G could be deployed on a large scale. No equipment manufacturer would think that 5G could be deployed quickly. Even with the rapid progress of relevant standards, the freezing period of standards from June to September has just started. There is still a long way to go to establish a base station and compatibility mechanism (Huawei and ZTE must be compatible with each other in the future).
Industrial Internet of Things is relatively a regional network, so there is a possibility of breakthrough. In the 4G era, however, everyone was driven crazy by Qualcomm chips and standards, and finally found a hard place in the industrial sector. If we can find a way to bypass Qualcomm without having to die in 5G era, NB-IoT narrowband Internet of Things is the first to take the lead.
Three Brothers in 5G Era
There are three standards for 5G: LTE (Authorized Channel), LTE-U (Unauthorized Channel) and NB-IoT (Authorized Channel).
LTE is an authorized channel. This is the biggest fat, of course, the dishes of telecom operators. The main standard is that telecom operators are doing it, and Huawei is pushing it. Because authorized channels are basically exclusive, such as power microwave, others can't use them. This is the monopoly resources of operators, which can only be operated by operators.
LTE-U (unlicensed) is an unauthorized channel. Note that this is the most familiar WiFi killer. WiFi routers, generally only 30 to 50 meters; general routers to 100 meters, only signals, can not communicate. The LET-U can reach 300 to 500 meters (similar to the "MAN" once pushed in the era of 3G). ISM (industry, science, medicine) can be used at will in three areas, including the main frequency bands from 5K, 13.56M to 2.4G and 5.8G.
The most vocal NB-IoT still belongs to the authorized channel. The biggest characteristic of NB-IoT is that it can cover a small county with an astonishing transmission distance of 10 km. And it can carry countless terminals, a base station can carry more than 200,000 terminals. This means that managing a well cover and parking fees are easy and cheap. Even if a base station is set up with 2 million yuan, it can be managed with a radius of 10 km.
Of course, because NB-IoT is an authorized channel, it is still unlikely to be used in enterprises. So NB-IoT can only access the core network (operators) before entering the enterprise.
5G Solves Industrial Ethernet
Compared with general ethernet, the real-time requirement of industrial data transmission is very high. Industrial Ethernet has QoS (Quality of Service Protocol), so it is not easy to lose packets when transmitting real-time data. This is because QoS supports priority and can identify priority sending level, such as automatic voice recognition or mail. The real-time requirement of voice is very high. Packet loss will cause noise, while TV packet loss will cause random code. These are unacceptable. Real-time video must have QoS, and image is often the content transmission that consumes the most bandwidth.
Why can't 4G be used on the industrial Internet, because without QoS, besides voice recognition, it can be said that it is a standard IT network. 5G can support priority, such as device state first, and general data transfer priority last.
So it is worth expecting that 5G is the foundation of industrial Internet. At present, 40% of the situation is basically capable of implementation (say 100% or a little exaggerated). 4G can only reach 450M at most, while 5G LTE can reach 450M~800M.
More importantly, selectivity has increased substantially. As far as technology schools are concerned, the technology in the 4G era is mainly Qualcomm, full of pots, while in the 5G era, Huawei, Cisco and Siemens all have their own technology. This time, industry has more options.
Technology can't rot in your hands
LTE is an operator standard and cannot be allowed to enter the enterprise, so it is impossible to build a base station for the iPhone 7. But since 5G standards and large-scale layout are still waiting for some time, these already have some eye-catching technology, it is impossible to idle it. As a result, technology began to change and evolve. For example, LTE had an improved version. Huawei took the lead in introducing the so-called enterprise version of LTE (eLTE).
It has two bands, one is 800M (currently allocated to Unicom), and the other is 900, which is FM. This band can be used to complete the carrier frequency of eLTE, that is to say, it can be used for enterprise applications.
Based on the same considerations, eLTE-IoT is a flexible way of NB-IoT narrowband Internet of Things. In this way, we can enter factories and become the cornerstone of the Internet of Things for intelligent manufacturing. Importantly, eLTE-IoT has a lower cost, so eLTE-IoT is the first to enter the industrial field.
ELTE-IoT has become one of the best 5G leading positions in industrial parks because of its outstanding characteristics (low power consumption, multiple terminals and long distance). ELTE-IoT, as an unauthorized channel, has a bandwidth of 200,000 and a very small power, not exceeding 200 mw. Therefore, the establishment of such base stations in the park does not affect each other.
At present, eLTE-IoT has gradually entered the factory, becoming the best means of data transmission in the Internet of Things. It will effectively replace RFID, equipment networking and other fields, and become a new joy of the Internet of Things in smart factories.