With the spread of smartphones and the use of the Internet in all situations, mobile networks have become indispensable for their lives.
How will this mobile network be created and evolve in the future?Softbank He talked to Takanoto Ando, who is in charge of wireless technology development at the mobile network headquarters.
In 2020, 5g commercial services will start in Japan.
Yes, I am now in a department that is responsible for creating a wireless network and is developing wireless devices with engineers from communication equipment vendors.Mobile systems are not completed from the beginning, but are expanded nationwide while updating functions every day, so what kind of functions the 5G network at the beginning of the service starts, and how it will be improved next.We are planning to develop technology, assuming users and users that will increase, whether they are going.
The mobile network technology has changed to 1G, 2G, 3G, and 4G, along with the development of mobile phones that have changed from audio, email, web, and videos, and connects information anytime, anywhere, so that it can be connected by a variety of means.It has evolved to a larger capacity.
Mobile system history
I have been involved in the development of mobile technology since the beginning of the PHS, but there are still challenges to challenge even if the technology has advanced.For example, it is quite difficult to maintain high -speed communication quality during morning and evening commuting hours.This is because many people use a smartphone at the same time on commuter trains and stations, and the number of terminals connected to one base station increases, and the communication speed decreases.
As a technology to solve these issues, the world's first commercial service of Massive Mimo (Massive Mimo) was provided in 2016.This technology does not reduce the speed even in crowded situations, but can optimize radio waves for each terminal to be connected to make it easier to maintain communication speed.It is natural, but the latest technology is incorporated from a familiar place.
A technology that maximizes communication capacity by improving signal quality using dozens to hundreds of antenna elements.A development type of "MIMO" that enhances communication capacity using a multiple technology by multi -antenna.4x4 MIMO has a maximum communication capacity of up to four times.8x8 MIMO reaches up to 8 times the communication capacity.5G uses a highly advanced millimeter wave band, but uses a beam forming technology by Massive Maimo to use it on mobile.