4th mobile carrier emerging again… “Securing self serviceable frequency to be a core”
Kim Ji Young | kjy@ | 2018-05-09 11:20:52

[Digital Times, Kim Ji-young] It is notable that the cable TV industry is expected to announce the fourth mobile communication challenge and launch a competitive fourth mobile operator. The key is the analysis that secures LTE and 5G mobile communication (5G) frequency that can provide independent service.

According to industry sources on May 8, LTE frequency that can provide stable service and 5G frequency that can propel new business will not be competitive if the 4th E-Tong launches. In the case of a competitive frequency is not allocated, there will be a lot of pressure to escape the intention of launching the fourth wave because of the quality competition with the existing three networks.

Currently, the remaining frequency for the fourth tunnel is the 2.5GHz band for LTE. There is a 5G mobile communication (5G) frequency band, but in the June auction, there will be no return to the 4th band because the 5G nationwide 3.5GHz band will be divided into three. The band of 600MHz is still in the 28GHz band for 5G, but it is not suitable for nationwide networks.

In the case of the 4th E-Tong is launched, it is expected to be forced to focus on LTE service initially. The Korean government has left the 2.5GHz frequency band for the 4th hopes carrier in the 2016 frequency auction. In addition, the conversion of the frequency used in the existing LTE is also likely to return to the 4th band. The frequency of 2.3GHz, which is used for Wireless Broadband, can be secured if the 4th mobile carrier is engaged in the reallocation after the end of the period of use in March 2019. In 2021, a frequency reallocation of up to 340 MHz bandwidth is scheduled.

The problem is 5G. It is unfortunate that 4th E-Tong can be put on 5G service in reality. There is no frequency margin in the 3.5GHz band corresponding to the nationwide network among the 5G frequency allocation bands provided by the government. This frequency is difficult to expand into other areas. The band from 3700 MHz to 4200 MHz above the 3.5 GHz band is used for satellites. The bottom of 3400MHz is already used as a public frequency. Moreover, the band has been susceptible to interference with the 5G frequency, and the 20MHz bandwidth has been removed from the 5G frequency auction. The Korean government has opened up the possibility of allocating 600 ㎒ bandwidth to the fourth channel in the 28 ㎓ frequency band, the ultra-high frequency band for 5G. In the 28GHz band, a total bandwidth of 3000㎒ is designated for 5G use, but only 2400MHz has been auctioned. However, it is difficult to implement the 5G service in the 28GHz band because it is difficult to use the high-frequency band as a nationwide network.

Even though there is a frequency, it is difficult for 4th tunnel to provide 5G service immediately. The initial 5G commercialization standard of the three E-TONs is non-stand-alone (NSA) system that manages mobility using the existing LTE network and 5G for wireless, and LTE for wire-line.

Head of the Ministry of Science and Technology`s Ministry of Information and Communication, Kim Kyung-woo, mentioned, "Even though we secured 3GHz range at 28GHz, we only put 2.4GHz in the auction to prepare for the possibility of 4th." And 2.3GHz, which is the Wireless Broadband, which will be overdue. "

An industry expert pointed out, "It is necessary time to concern about the frequency for the 4th tunnel. We are going to enter the business with the new business using 5G, such as autonomous navigation and the IoT (Internet of Things) and we need a policy road map. "

By Kim Ji Young kjy@


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