When it comes to communication networks, you probably imagine that many people can use communication services all over Japan.In fact, in addition to the so -called 5g of 5G, the 5G usage form, in addition to the "public 5G", "Local 5G", which partially occupies 5g of 5G, and "private 5G", which partially occupies public 5G.There are three forms such as this.What are the features of each?
"Public 5G" and "Local 5G" are the most different difference who builds a network
A 5G network that provides communication services nationwide by a telecommunications carrier such as SoftBank is called "Public 5G".The 5G service has begun in March 2020, and its network is expanding steadily.
On the other hand, the 5G network built by companies and local governments for their own and limited areas is "Local 5G".The feature is that it is possible to build a completely independent network from the external network, without being affected by the area deployment of telecommunications carriers and congestion in the network.
Until now, companies and local governments have mainly used Wi-Fi when building networks in a limited area.Once you can build "local 5G", you can use it for various purposes.
For example, in logistics warehouses, it is said that automatic transport robots will be remotely controlled to improve transportation efficiency and use human flow data by high -resolution cameras for marketing to establish new attractions for customers in amusement facilities.It will also be possible.It can also be used for "smart factory" that automates the production line by remote control.In addition, it is expected that local governments will use their own services for residents and the construction of disaster prevention radio in the region.
Examination examples in smart factory.It is assumed that a "local 5G" will be built in the factory and monitoring control remotely.
In addition, it is assumed to be used by the local community and the use of disaster prevention radio in the region, using the "local 5G" operated.By the way, in order to use "local 5G", it is necessary for companies and local governments to obtain a license for a radio station in the "local 5G" dedicated frequency band.
"Private 5G" key is networking licging technology
"Private 5G" is located between "Local 5G" and "Public 5G".Softbank has announced that it will launch "private 5G" in 2022.We asked SoftBank's network technician Takashi Okura about these differences.
What are the features of "private 5G"?
"Private 5G" is a managed service that uses SoftBank frequency bands on a limited site of companies and local governments to provide necessary bandwidth and required 5G networks.
There is a network environment that can be used exclusively for many companies and local governments, but there are advantages such as high security to build our own network "Local 5G", but a radio station license for 5G -only frequency band.There is also a hassle and cost of acquisition, maintenance and operation, and cost.
Softbank will be carried out by SoftBank, in addition to the "private 5G" network according to individual requirements.In addition, since we use the SoftBank frequency, companies and local governments do not need to obtain a radio station license, so I think it is a service that can meet the needs of many companies.
"Private 5G" is a managed service that uses SoftBank frequency bands on a limited site of companies and local governments to provide necessary bandwidth and required 5G networks.
There is a network environment that can be used exclusively for many companies and local governments, but there are advantages such as high security to build our own network "Local 5G", but a radio station license for 5G -only frequency band.There is also a hassle and cost of acquisition, maintenance and operation, and cost.
Softbank will be carried out by SoftBank, in addition to the "private 5G" network according to individual requirements.In addition, since we use the SoftBank frequency, companies and local governments do not need to obtain a radio station license, so I think it is a service that can meet the needs of many companies.
Why was it possible to build such a network with 5G?
Among the 5G technical requirements, there is a priority control function that can be assigned by connection and service applications, which can provide functions such as ultra -low delay and many simultaneous connections.
Since this function can be controlled by slicing (= division) according to the purpose of communication, for example, using a "low delay" slice for remote control of the machine, "high -speed large capacity slice" for transmission of images.You will be able to provide individual customized networks for various applications of companies and local governments."Private 5G" is a service that utilizes this function.
Among the 5G technical requirements, there is a priority control function that can be assigned by connection and service applications, which can provide functions such as ultra -low delay and many simultaneous connections.
Since this function can be controlled by slicing (= division) according to the purpose of communication, for example, using a "low delay" slice for remote control of the machine, "high -speed large capacity slice" for transmission of images.You will be able to provide individual customized networks for various applications of companies and local governments."Private 5G" is a service that utilizes this function.
The key technology is "Network Slicing"
The current 5G network is provided in a system configuration called "non -tandalon (NSA)" in cooperation between existing 4G core networks and 5G base stations.Therefore, the services that can be provided are limited to high -speed large -capacity communication only.In order to provide functions such as a 5g feature of ultra -low delay and many simultaneous connections, a "standalone (SA)" built with only a 5G system is required.
"Standalon" uses 5G -only facilities for the core network.Unlike "non -tandalon", which combines 4G core network and 5G base station, the control signals and communication data for the terminal and base station are divided into different routes.The efficiency of data processing will increase and you will be able to respond to various requirements.In addition, since the "standalone" is only for 5G wireless equipment, the communication delay between the terminal to the wireless base station can be achieved to be reduced to about 1 to 3 ms from the conventional 30 to 50 ms.
In this way, the "standalone" that allows all network systems to be made can fully demonstrate 5G functions such as low -speed and simultaneous connections in addition to high -speed large capacity.
Standalon has already been introduced in the United States, China, and Europe, which develops 5G earlier.Companies that want to make the most of the 5G functions are waiting for full -scale development in Japan.
(Publication date: March 22, 2021) Sentence: Soft Bank News Editorial Department