The Ministry of Internal Affairs and Communications has announced its goal of raising the number of base stations of 5G (5th generation mobile communication system), which is maintained by mobile companies by the end of June 2020, to more than 210,000 stations, three times the initial plan.。The company plans to revise the system so that the frequency band used in an existing 4G can be converted to 5G by September 2008, and promote the development of 5G base stations at each mobile company.While SoftBank and KDDI have expressed a significant back of the 5G base station development, NTT DOCOMO does not lose their cautious posture.There are concerns that the diversion of 4G radio waves will stay at 5G, which does not speed up.
4G電波転用では速度が出ない「なんちゃって5G」に
携帯4社は5Gのピクト表示の方針に合意している。4G周波数帯を5Gに転用した場合、どの程度速度が出るのか。利用者保護が求められる。（撮影：日経クロステック）When I interviewed Kazuhiro Yoshizawa, President of NTT DOCOMO the other day, he was most likely to be a topic of diverting the 4G frequency band to 5G.Mr. Yoshizawa said, "I agree with the policy of diverting the existing frequency band to 5G, but the speed is not possible just by diverting the 4G band to 5G.. We should be careful not to misunderstand the advantage, "he pointed out in a strong tone.
関連記事：来客数・販売数は回復、「5Gの遅れを取り戻す」ドコモ吉沢社長A new policy of the Ministry of Internal Affairs and Communications, which converts the 4G frequency band to 5G, was realized by SoftBank et al.The frequency band of 3.7GHz, 4.5GHz, and 28GHz bands assigned to mobile companies for 5G is difficult for radio waves to fly far.If the 4G frequency band where radio waves can easily fly can be converted to 5G, the 5G area can be expanded at once.
The disadvantage, on the other hand, is that, as Mr. Yoshizawa pointed out, simply converting the bandwidth of the 4G frequency band to 5G is the same as 4G.That's because it's "5g?"
By the end of 2001, SoftBank and KDDI will increase the number of 5G base stations to 50,000 stations, respectively.One of the reasons why the initial plan was made up of is 5G in the 4G frequency band.SoftBank officials say, "I want to proceed from the 700MHz band or 1.7GHz band to 5G for 4G, but in the area where the 4G frequency band is converted to 5G.Initially, we want to achieve the speed of 1G bit / second. "
On the other hand, Mr. Yoshizawa of Docomo said, "We will promote the use of existing frequency bands, but by the end of 200,000, the policy of DOCOMO, which has 20,000 5G base stations, will be realized in a new frequency band for 5g.。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。
実際、海外ではピクト表示の有利誤認で問題になった経緯がある。米国の大手携帯電話事業者のAT&Tが、4Gで通信しているにもかかわらず「5GE」というピクト表示を採用し、利用者の反発を招いたケースだ。こうした事態を防ぐため国内の携帯大手4社は「5G」のピクト表示について、通信中の場合は5Gエリアのみ、待ち受けの場合は4Gのアンカーバンドで在圏しているケースを認めるという方針で合意している。
However, there is still the problem that the speed will not appear when the 4G frequency band is converted to 5G.According to the Ministry of Internal Affairs and Communications, "It is desirable to strive to protect user by publishing maps and lists by area so that users can understand how maximum communication speed will be."Point out.
