The 5G frequency auction is expected to be released a week later, and the government is likely to supply only the 280MHz bandwidth, which is 20MHz lower than the existing 3.5GHz band, supplied by the 5G frequency. . In some cases, the existing 300MHz band is smaller than the 5G frequency band planned by overseas competitors. According to the industry, the Ministry of Science, Technology and Information (MIC) is considering the supply of 3.5GHz, which is much smaller than the 5G supply plan for overseas competition. According to Qualcomm, overseas countries, especially Japan, are planning to supply 1,100 MHz in the 3.6 ~ 4.2GHz band and 4.4 ~ 4.9GHz band. The US is also considering a 650-MHz bandwidth in the 3.55 ~ 3.7㎓ and 3.7 ~ 4.2㎓ bands. China, which is emerging as a major player in 5G technology, plans to supply 500MHz bandwidth in the 3.3 ~ 3.6GHz band and 4.8 ~ 5.0GHz band. In addition, Germany and France are expected to supply more than 300MHz. Of course, these countries have not started auctions, but they are broader in scope than Korea`s 3.5GHz band.

5G is especially advantageous for providing smooth service by ensuring sufficient frequency because it is characterized by high-speed and ultra low-jerk. In spite of this characteristic, it is the horn interference problem that excludes the width of 20MHz in the conventional 300MHz bandwidth. The 3.5GHz band supplied by the government refers to the band 3400 ~ 3700MHz. Of these, 3400 MHz band and the lower side adjacent to the public frequency and horn interference problem is constantly raised, it is excluded. In addition, above the 3700 MHz band, there are satellite related problems. Even if migrant workers boil themselves, it seems difficult for the government to widen both sides in the current situation.

Therefore, it is inevitable for mobile carriers to revise their strategies.

A mobile carrier representative said, "I have been setting up an auction strategy with the 300MHz bandwidth in mind, but there has been a crosstalk." Some of the industry insists that there should be sufficient verification of the interference problem. An industry official said, "The decision to issue a horn interference based on the uncompleted European Postal and Telecommunications Administrations Conference (CEPT) is a hasty move to meet the schedule and auction schedule." In response, the Ministry of Information and Communication said it had fully discussed with mobile operators. An official from the Ministry of Information and Communication said, "Since last year, we have been verifying the interference with test equipment through the test equipment." In February, we notified the technical team of each mobile communication company of the actual data and got enough analysis time. "We discussed the exclusion from March," he stated.

The Ministry of Information and Communication said that mobile operators should utilize the 28GHz band, which is supplied together, rather than being buried only in the 3.5GHz band of the 5G frequency. "A millimeter-wave band of 28 GHz should be implemented not only at 3.5 GHz but also at 5 G, which is an opportunity to become a `first mover,`" a C-band and millimeter wave We have not found as many of us as we are in the band. "

However, Mr. Lee is planning to use the 3.5GHz band as a nationwide network. In the case of the 28GHz band, it is necessary to build much more compact equipment such as a repeater, which is more than twice the investment cost of 3.5GHz. An industry expert said, "The reduction in the 20 MHz range has made it impossible for some mobile carriers to distribute evenly." It is certain that the auction will be more intense. "

By Jong Ye Lin yeslin@


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