NTT DoCoMo is making a reference exhibit of "next-generation mobile communication 5G" at CEATEC. "5G" is a communication method following "4G" such as current LTE and LTE-Advanced.
LTE currently has a maximum downlink speed of 150Mbps, but 5G is said to expand to a maximum downlink speed of 10Gbps. The key to realizing this is the "high frequency band" and "broadband". The LTE service with a maximum downlink of 150 Mbps, which Docomo plans to start in October, uses 20 MHz bandwidth, but 5G's 10 Gbps speed is achieved by using 1 GHz bandwidth (1000 MHz width).
Currently, there is no 1GHz wide band available for mobile communication, so it is necessary to develop higher frequency bands. The 5G simulation that DoCoMo is introducing at the booth this time assumes the use of the 20 GHz band/1 GHz width. Whether or not to use high frequency bands for 5G will be decided by the ITU (International Telecommunications Union) in the future, and then each country will allocate the bands.
The high frequency band has the disadvantage that it is difficult for radio waves to reach long distances, but Docomo plans to solve this problem by utilizing "small cells" (small base stations). “The higher the frequency, the narrower the area (that can be covered by one base station). This prevents things like packet jams and enables stable communication." It is also envisioned that the number of antennas that can be inserted into the base station and terminals will be increased to 8×8, 16×16, etc. to increase the speed.
There are high expectations for small cells and high frequency bands. become.” (explainer). Also, since it is difficult for radio waves in the high frequency band to reach indoors, we plan to cover this with Wi-Fi spots, femtocells, IMCS (indoor base stations), etc.
At the booth, we are simulating the situation where there are many people using mobile phones in an urban area where buildings are densely packed, and we are comparing the performance difference between LTE and 5G (we are conducting a demonstration experiment of communication. Instead, it is a demonstration that conveys the world of 5G imagined by DoCoMo). The simulation also shows how 4K videos can be streamed smoothly. DoCoMo expects the 5G service to start in 2020. "I hope we can provide it by the time the Tokyo Olympics are held," said the explainer.
5G simulation introduced at the booth. The red area indicates a maximum downlink speed of 10 GbpsDoCoMo's next-generation mobile communication 5G is a high-value-added communication/broadcasting product in the CEATEC AWARD 2013. Received the "Minister of Internal Affairs and Communications Award" for technology and service. The originality of the architecture and the high degree of solutionability for increasing communication traffic were highly evaluated.
Received the "Minister of Internal Affairs and Communications Award" at "CEATEC AWARD 2013"
