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What is 4G (fourth-generation wireless)?
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| bet | 1/4 | | Sana | 21.05.2024 | | Hajmi | 266,74 Kb. | | #247908 |
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What is 4G (fourth-generation wireless)?
4G is the short name for fourth-generation wireless, the stage of broadband mobile communications that supersedes 3G (third-generation wireless) and is the predecessor of 5G (fifth-generation wireless).
The 4G wireless cellular standard was defined by the International Telecommunication Union (ITU) and specifies the key characteristics of the standard, including transmission technology and data speeds.
Each generation of wireless cellular technology has introduced increased bandwidth speeds and network capacity. 4G users get speeds of up to 100 Mbps, while 3G only promised a peak speed of 14 Mbps.
With 4G download speeds, wireless users can stream high-definition video and audio. 4G also enables wireless broadband, which provides a way for users to get internet connectivity without the need for a fixed, wired connection from an internet service provider (ISP).
How does 4G work?
At the most basic level, a 4G connection works via an antenna that transmits over radio frequencies, enabling mobile devices to connect to mobile networks.
The transmission and receiving capabilities of 4G are powered by MIMO (Multiple Input Multiple Output) and Orthogonal Frequency Division Multiplexing (OFDM) technologies. Both MIMO and OFDM enable more capacity and bandwidth in comparison to 3G. OFDM provides more speed than the primary technologies that powered 3G, which include TDMA (Time Division Multiple Access) and CDMA (Code Division Multiple Access) technology. With MIMO, 4G reduces network congestion in comparison to 3G, because more users can be supported.
4G is also an all-IP (internet protocol)-based standard for both voice and data, different from 3G, which only uses IP for data, while enabling voice with a circuit-switched network. As an all-IP network, 4G is more efficient for mobile network providers to operate and optimize than managing different network technologies for voice and data.
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