Long Term Evolution - or more popularly, LTE - has been more or less the standard in Japanese mobile networks, growing in popularity and usage since it was launched in 2010. LTE is technically not 4G, as misrepresented in most marketing ploys - it is 3.9G, with a standard bandwidth of around 70 to 80 Megabits per second. With 5G technology, Japan is looking at speeds of 10 Gigabits per second. For comparison, if you think your LTE connection is fast enough, imagine speeds 100 faster than your current LTE. This kind of connection is of course primed for higher densities of content, like 4K videos. We might not be seeing a lot of 4K-resolution videos at the moment - and there are not a lot of screens, whether TV ormobile gadgets, that can handle 4K video - but Japan is looking at 4K and even 8K video to be developed in the near future. For those kinds of high density content, 5G connections will be almost essential.
With this in mind, Japan’s Ministry of Communications plans to give the private sector impetus for developing 5G network technology faster than other countries. The ministry is planning to take this proposal to Japan’s three big mobile carriers this year - that is, NTT Docomo, KDDI and SoftBank - as well as smaller communications companies and manufacturers of cellular phone technology and network hardware, the likes of Panasonic, Sharp and Fujitsu. It is understood that the ministry will be looking for government support for funding the development of 5G technology. The Japanese government is even hoping to pull in the considerable abilities of Japanese universities to make sure Japan is way ahead of rivals in Europe and South Korea in this endeavor.
NTT Docomo looking toward 5G mobile network infrastructure by 2020
NTT Docomo, Japan’s largest mobile network by virtue of sales, has released a statement of its ambitions for an ultra-high speed 5G network in place by the year 2020. Presenting the available details of this plan to the technology media at this year’s Combined Exhibition of Advanced Technologies (CEATEC) Japan, Docomo hopes to join other major technology outfits in coming up with their own 5G network by the end of the decade.
According to Docomo, 3G frequencies - that is, the standard network infrastructure including HSDPA, HSUPA, and HSDPA+ - are getting a bit crowded because of the ubiquity of smartphones in the current market. As with the current leading edge 4G LTE-Advanced, Docomo will aim to use higher unused frequencies with its 5G plan. This goal will utilize additional smaller cells along with the current ones to boost the network signal. The small cells would cover smaller areas, with the company planning to use a lot of these in regional batches. The 5G concept is not a finished product yet, as the concept and indeed the global standard, is still being developed. But the Japanese mobile communications leader is aiming to have the 5G technology and infrastructure come together by 2020.
NTT Docomo is not alone in pursuing 5G speeds. In May this year, South Korean mobile giants Samsung revealed that it had hit 1Gbps during testing of its own 5G technology. As Samsung noted at the time, using high-frequency bandwidths - for 5G, it may fall in the 6GHz range - will pose issues in transmission, as the range of these frequencies will be smaller. This is the current problem for most 5G developers, but it should be ironed out eventually. Chinese technology outfit Huawei has also claims to be on the development of 5G network technologies, which it plans to have ready for 2020. Everybody seems to peg 5G by the end of the decade, but for consumers and smartphone users, it just means that 2020 could be a breakthrough year for handheld download speeds.
sources：http://en.twwtn.com/Bignews/68863.html
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