Question 1: What are the limitations of 2G than WIFI?
In the end, 2G is a stable and reliable industrial-grade communication technology, and WIFI is also a category of civil communication technology.
From the signal point of view, 2G is data transmission data, directly pointing to the server, if one signal is collected every 5 minutes, the flow rate is up to 20M in one month, the signal is stable and the flow consumption is limited; WIFI is a kind of personal computer, The technology of wirelessly interconnecting terminals such as mobile phones (IPADs), in fact, is a high-end radio signal. The biggest advantage is that the transmission speed is high, and its biggest constraint is: limited coverage and unstable signal.
2G is the first choice for remote monitoring. In communication technology, the lower the frequency, the farther it can transmit, the larger the coverage, whether it is mountainous or remote rural areas, compared to any other wireless monitoring method. It has the highest coverage and the widest coverage.
Household and some micro-reverse and power optimizers are used for short-distance transmission with WIFI. However, a wall may cause transmission interruption, poor signal penetration through the wall, and more failures in actual use.
A marketer with 8 years of experience said that "there is no need to catch 3G/4G/WIFI express trains. There are also many people who turn around to find 2G because 2G is stable."
Question 2: Will domestic 2G be completely cancelled in a short time?
In April this year, China Unicom issued an internal notice, and Unicom will officially begin 2G withdrawal. Due to the low profit margin and the difficulty in maintaining the hardware equipment of the network, China Unicom will officially start the 2G network retreat. Unicom believes that with the popularization of 3G and 4G networks, the number of 2G users has shrunk rapidly. At present, China Unicom users have reached 280 million, of which The number of 2G users is about 5 million, accounting for 1.8%. Therefore, even if China Unicom shuts down the 2G network, the impact will not be too great.
So what about moving? There is no essential difference between moving and Unicom in the big environment, and it should be done, but the actual situation is more complicated.
First of all, the number of mobile 2G users is still very large, and rushing to retreat will cause an incalculable impact. According to the data, China Mobile still has more than 200 million 2G users, and this order of magnitude has no way to shut down 2G networks on its own.
2G networks are still in high use in some remote areas, and the actual situation in these areas makes it difficult for 3G and 4G networks to enter, so it is impossible to replace 2G networks with new ones. In order to ensure normal communication in this part of the region, the government will not allow mobile to retire.
In addition, some people who have no need for the network can still choose 2G even if they can use 4G network, because the tariff of 2G service is cheaper than 4G.
Secondly, in addition to the huge number of 2G users, one reason why mobile does not shut down 2G networks is that the new IoT market has new demands for 2G networks.
For the Internet of Things, coverage requirements are much higher than the demand for network speed, which is the advantage of mobile 2G networks. Because IoT services such as POS machines and shared bicycles require a small amount of data to be transmitted, 2G networks are already capable, but they are required to transmit signals anywhere.
Moreover, in terms of cost considerations, the price of 2G modules is only a fraction of that of 4G modules. These IoT companies will definitely use 2G networks when they choose, but instead generate a new market demand. Therefore, in 2017, the number of 2G base stations of China Mobile has not decreased, but has increased by 30,000.
Of course, this is for the enterprise-level market. In the face of the consumer market, China Mobile is still actively guiding users to move from 2G to 4G. During this period, it also used a lot of incentives. For example, speeding up 4G fee reduction, providing subsidies, and gradually closing down some low-cost 2G packages, and rushing users to 4G services. According to the data, China Mobile's 4G subscribers are close to 700 million.
However, no matter how to stimulate the growth of 4G, China Mobile can't completely withdraw from the 2G market for a long time. This is the policy consideration and the market choice.
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