The three major operators have launched 5G networks in various regions this year. 5G mobile phones were officially released in 2019, and 5G networks will be fully implemented by 2020. Therefore, the withdrawal of 2G networks is also in line with historical development. Prior to this, Professor of the Seventh Institute of China Electronics Technology Group Corporation Prof. Li Jinliang of the senior engineer once wrote in the “Communications Industry News” (Net) that the problem caused by the 2G network is not shut down. Since the GSM system equipment has been used for more than 20 years, it has been gradually aging, and faults occur from time to time. It is necessary to build new networks. When more maintenance is needed to maintain the normal, many existing 2G users have been upgraded to 3G/4G, 2G users are getting smaller and smaller, the actual use of 2G traffic is also getting less and less, and 2G's contributions are also With less and less, the income obtained is difficult to meet the maintenance expenditure, so the quality of voice services provided is getting worse and worse. It is not unreasonable. It is inaudible.
However, after shutting down the 2G network and transferring spectrum resources to 4G/5G, Professor Li Jinliang believes that it will bring many benefits to the development of the industry.
First of all, the technology innovation dividend can be obtained. 4G many performance indicators than the 2G increase 100 times, only data and voice as an example: 2G GSM peak data transfer rate is only 750kbps, Internet watching movies and television is impossible; and 4G rate Rising to 100Mbps, about 133 times higher, viewing HDTVs is commonplace. In terms of voice, with a typical configuration, the single-station concurrent user capacity GSM is only 42, while TD-LTE is up to 1200, a 28-fold increase, And VoLTE HD voice business service quality is much better than GSM.
Second, the gold spectrum dividend is available. The GSM spectrum is mainly in two golden bands of 900MHz and 1800MHz, totaling 170MHz; and the spectrum of TD-LTE is completely above 1900MHz. Planned in the 900MHz and 1900MHz, 2600MHz three-band path loss. Designing an area as an example, the station used in the 900MHz band is about 30% of 1900MHz and 15% of 2600MHz. The investment used in the 900MHz band is only 28% of 1900MHz and 13% of 2600MHz.
Finally, cost-saving bonuses are available. Since the system equipment and terminal equipment for mobile communications are built on the basis of integrated circuits, according to Moore's Law, the chip integration density is doubled every 2-3 years, the processor speed is doubled, and the chip cost is halved. Measured by price/performance ratio, GSM provides 28,667 yuan per hour of busy-time throughput, while TD-LTE costs only 1,944 yuan, and the cost savings are as high as 93%.
Some analysts believe that the withdrawal of 2G networks may affect some old-age machines that only support 2G networks. In addition, for some remote areas, if there is no direct 2G network, 3G signals will not be able to get on, then the phone will call. No, this is also a side effect. In this regard, Prof. Li Jinliang suggested that the plan for clearing the network should be done.
Find out the specific situations of the existing 2G users in different regions, and make different levels of discounts according to the length of their access time, or send 4G mobile phones, or promotional fees, etc., so that users are willing to upgrade. Also find out some GPRS-based Wireless control terminals, children's telephone watches, industrial application terminals, etc. may not support upgrading and have problems, and propose solutions; survey some Internet of Things applications such as water and electricity meter reading, sharing bicycles and the like, and study how to upgrade to 4G or 5G; According to the specific conditions of the region, a batch-wide clean-up network plan should be established. The sites, surfaces, power supplies, transmissions, etc. must be fully utilized and should not be discarded as waste. In particular, the dual-band frequency of 2G should be studied. How to use TD-LTE technical solutions separately.
Metabolism is the law of the natural world, and human society must follow. The 2G clearing frequency network is also the metabolic law that radio applications must follow. China's operators and users should understand this law. According to data released by Unicom, 2017 4G A net increase of 70.33 million users reached 175 million, plus 4G users added in 2018. So far there are approximately 187 million 4G users.