5G networks are predicted to have more than 1. 7 billion subscribers worldwide by 2025. The main advantage of the new networks is that they will have greater bandwidth, giving higher download speeds. It is expected the networks will not exclusively serve cellphones like existing cellular networks, but also be used as general internet service providers for laptops and desktop computers.
About 5G in brief
5G networks are predicted to have more than 1. 7 billion subscribers worldwide by 2025. The main advantage of the new networks is that they will have greater bandwidth, giving higher download speeds. The increased speed is achieved partly by using higher-frequency radio waves than previous cellular networks. 5G networks operate on up to three frequency bands — low, medium, and high. A 5G network will be composed of networks of up to 3 different types of cells, each requiring specific antenna designs, each providing a different tradeoff of download speed vs. distance and service area. It is expected the networks will not exclusively serve cellphones like existing cellular networks, but also be used as general internet service providers for laptops and desktop computers, competing with existing ISPs such as cable internet. The new 5G wireless devices also have 4G capability, as well as higher capacity for additional capacity, such as millimeter waves for higher throughput. It can support up to a million devices per square kilometer, while 4G supports up to 100,000 devices per sq kilometer. It will also make possible new applications in internet of things, machine to machine areas and machine-to-machine areas. The above speeds are those achieved in actual tests in 2020, and speeds are expected to increase during rollout. The industry consortium setting standards for 5G is the 3rd Generation Partnership Project. It defines any system using 5G NR software as \”5G\”, a definition that came into general use by late 2018.
Previously, some reserved the term 5G for systems that deliver download speeds of 20 Gbits as specified in the ITU’s IMT-2020 document, but this is no longer the standard for the next-generation network. It uses a similar frequency range to 4G cellphones, 600-850 MHz, giving download speeds a little higher than 4G: 30-250 megabits per second. Low-band 5G uses microwaves of 2. 5-3. 7 GHz, allowing speeds of 100-900 Mbits, with each cell tower providing service up to several miles in radius. This level of service is the most widely deployed, and should be available in most metropolitan areas in 2020. Some regions are not implementing low-band, making this the minimum service level. Due to their higher cost, plans are to deploy these cells only in dense urban environments and areas where crowds of people congregate such as sports stadiums and convention centers. It often achieves download speeds in the gigabit per second range, comparable to cable internet, but Millimeter waves have a more limited range, requiring many small cells. It also has trouble passing through some types of materials such as walls and windows. It has a higher speed antenna within range at their location, with a local antenna array and low power automated transceiver in a cell, over the high frequency channels assigned by the telephone network and the wireless backhaul. As in other cell networks, a mobile device crossing from one cell to another is automatically switched off to another.
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This page is based on the article 5G published in Wikipedia (as of Jan. 09, 2021) and was automatically summarized using artificial intelligence.
