A lot of people are wondering what 4G means, why 4G is required, what evolution from 1G to 4G is , what features 4G wireless systems are and what difference between 4G and 4G LTE are.
Before coming across all that, I would love to give an introduction to wireless communication and its types; Wireless communication is among technology’s biggest contributions to mankind. It involves the transmission of information over a distance without help of wires, cables or any other forms of electrical conductors. The transmitted distance can be anywhere between a few meters (for example, a television’s remote control) and thousands of kilometers (for example, radio communication).
Some of the devices used for wireless communication are cordless telephones, mobiles, GPS units, wireless computer parts, and satellite television.
Definition 4G Wireless Systems
4G stands for fourth generation wireless technology, it provides a comprehensive IP solution where voice, data, and multimedia can be given to user on an anytime and anywhere basis, it includes several types of broadband wireless communication system access including cellular telephone system.
Fourth generation wireless system is a packet switched wireless system with wide area coverage and high throughput. It is designed to be cost effective and to provide high spectral efficiency.
Why 4G is required
Due to substantial growth in overall number of subscribers and high demand of new services like data, audio, image or video.
Evolution of 4G Technology
2G Wireless System: Commercially launched on the GSM standard in 1991, 2G introduced data services for mobile, starting with SMS text messages and multimedia messages.
3G Wireless System: it was developed in the late 1990s; Japan is the first country having introduced 3G nationally, 3G networks can typically download data around 800 to 950 kilo-bits per second.
4G Wireless System: The 4G wireless uses Orthogonal Frequency Division Multiplexing (OFDM), Ultra-Wide Radio Band (UWB), and Millimeter wireless. Data rate of 20mbps is employed. Mobile speed will be up to 200km/hr. The high performance is achieved by the use of long term channel prediction, in both time and frequency, scheduling among users and smart antennas combined with adaptive modulation and power control.
Features of 4G Wireless Systems:
- Support for interactive multimedia, voice, streaming video, Internet, and other broadband services
- IP based mobile system
- High speed, high capacity, and low cost per bit
- Global access, service profitability, and scalable mobile services
- Seamless switching, and a variety of Quality of services driven
- Better Scheduling and call admission control techniques
- Ad hoc and multi hop networks
- Better spectral efficiency
Difference between 4G and 4G LTE:
Both 4G and 4G LTE refer to networking standards that are starting to replace the older 3G data networks used by wireless carriers.
4G networks can range anywhere from 3 to 8 megabits per second, depending on congestion, the wireless carrier and the specific technology the company has used for its data network.
4G LTE is the most advanced in terms of speed. The general claim is that 4G LTE networks can download data at speeds between 5 and 12 megabits per second — enough for smooth streaming for live video and better response times for online multiplayer games.