Expectations for the ambitious goals listed by "5G" to the latest communication standards

"5G" that raises expectations for spread

Words used in the world of technology change every day.In fact, there are many words that have been heard recently, and that they have already penetrated but are not surprisingly understood.[Image] If the 5G network develops, will the spread of metaberse be spread?The Metaverse Space "Phantasm Seven" This series is a commentary article on these terms.The fifth is about "5G".5G, which began to spread as a new line standard for mobile phones, but unlike 4G, it is not just a standard for speeding up.Let's introduce a mysterious 5G.As a new communication standard, "5G" began in 2020 in Japan.I know the latest communication standards, but there may be unexpectedly few people who can clearly explain what it is.5G is a word that refers to the 5th generation (5th Generation) mobile communication system.This means that there are even before the fourth generation, the fourth generation "LTE" and its derivative technology "LTE-ADVANCED", the third generation "CDMA", the second generation "PDC""The first generation is an analog communication method (FDD-FDMA-FM).If you include derivative standards, it will be divided more finely, but you can think of it as such a generation.By the way, the service has already ended for 1G and 2G, and 3G is the end of each company's service, starting with the end of the au service in March this year.At present, 4G is the mainstream, and the situation is shifting to 5G.Looking at the communication speed, the data communication itself can hardly be possible in 1G, and it is only around 64kbps at 2G.It is 3G and rises from 1Mbps to 20Mbps, LTE (initially 3).It was called 9G, and I started riding a 100Mbps basin.After that, LTE-ADVANCED exceeded 1Gbps.So what changes in 5G?5G has three major goals, not just speeding up.That is "high -speed large capacity", "high -relying on high -speed", and "many simultaneous connections"."High -speed large capacity" is a very easy -to -understand guideline, and it is already in the benefit.In 5G, it uses a frequency band higher than the conventional 4G or a wide frequency band, which achieves a super high -speed communication of about 20 times the current target and a maximum of 20Gbps (currently 4G is around 1Gbps).However, as the frequency is high, the available distance is shorter, so in high -frequency band services that enable ultra -high -speed communication, the area where one base station can cover is extremely limited.For example, of the 5G services currently available in NTT DoCoMo, the highest speed (4 down 4).1Gbps) 28GHz band "millimeters" can be used only in the docomo shop.Even if the area spreads in the future, it is likely that only limited indoor facilities will be operated.Regarding "high -relying low delay", the 4G delay is a minimum of 10 milliseconds (= 0).While 01 seconds), 5g is 1 ms (= 0).001 seconds) is targeted.This allows for almost real -time communication, so that remote control of robots and vehicles can be performed safely.Regarding "many simultaneous connection", assuming that IoT equipment etc. will be connected directly to 5G, the number of equipment that can be connected to one base station is about 10 times (about 1 million per square km).The goal is to increase.The goal of 5G is very ambitious, but in some cases it is not necessary to satisfy everything at the same time.For example, for IoT, which does not require communication speed or low delay, a network that increases only the number of simultaneous connections at the same time is a network that emphasizes high reliability and low delay in remote control of drones that require real time.In addition, a technology called "slicing", which divides the network according to the purpose, is also used.This is one of the 5G goals that the flexible network design is possible.It will still take several years for 5g to be able to demonstrate 5G, which is only 5g of the spread of 5g.First of all, I would like to look forward to the future while enjoying the transition period from 4G to 5G.

Akira Ebihara