4G refers to the fourth generation of cellular network technology, introduced in the late 2000s and early 2010s. Compared to preceding third-generation (3G) technologies, 4G has been designed to support all-IP communications and broadband services, and eliminates circuit switching in voice telephony. It also has considerably higher data bandwidth compared to 3G, enabling a variety of data-intensive applications such as high-definition media streaming and the expansion of Internet of Things (IoT) applications.
AI overview
4G is the fourth generation of cellular network technology that emerged in the late 2000s and early 2010s, designed to deliver much faster data speeds than its predecessor 3G by using all-IP communications and eliminating older circuit-switching voice methods. It matters because the higher bandwidth enables data-intensive applications like HD video streaming and expanded Internet of Things devices that weren't practical on slower networks.
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Article
31 sectionsContents
- Technical overview
- Background
- Frequencies for 4G+ LTE networks
- IMT-Advanced requirements
- System standards
- IMT-2000 compliant 4G standards
- LTE Advanced
- IEEE 802.16m or WirelessMAN-Advanced
- Forerunner versions
- Long Term Evolution (LTE)
- Mobile WiMAX (IEEE 802.16e)
- TD-LTE for China market
- Discontinued candidate systems
- UMB (formerly EV-DO Rev. C)
- Flash-OFDM
- iBurst and MBWA (IEEE 802.20) systems
- Principal technologies in all candidate systems
- Key features
- Multiplexing and access schemes
- IPv6 support
- Advanced antenna systems
- Open-wireless Architecture and Software-defined radio (SDR)
- History of 4G and pre-4G technologies
- Disadvantages
- Beyond 4G research
- The future of 4G
- Past 4G networks
- See also
- Notes
- References
- External links
4G refers to the fourth generation of cellular network technology, introduced in the late 2000s and early 2010s. Compared to preceding third-generation (3G) technologies, 4G has been designed to support all-IP communications and broadband services, and eliminates circuit switching in voice telephony. It also has considerably higher data bandwidth compared to 3G, enabling a variety of data-intensive applications such as high-definition media streaming and the expansion of Internet of Things (IoT) applications.
The earliest deployed technologies marketed as "4G" were Long Term Evolution (LTE), developed by the 3GPP group, and Mobile Worldwide Interoperability for Microwave Access (Mobile WiMAX), based on IEEE specifications. These provided significant enhancements over previous 3G and 2G.