3G telecommunication networks support services that provide an information transfer at the rate of at least 200kbps. Later 3G releases, often denoted as 3.5G and 3.75G, provide mobile broadband access of several Mbps to smartphones and mobile modems in laptop computers. This ensures it can be applied to wireless voice telephony, mobile Internet access, fixed wireless Internet access, video calls and mobile TV technologies.
Fourth generation, or 4G, the next generation of mobile telecommunications technology, succeeding 3G and preceding 5G, was introduced in 2008. A 4G system, in addition to the usual voice and other services of 3G, provides mobile broadband Internet access, for example, to laptops with wireless modems, smartphones and other mobile devices.
Potential and current applications include amended mobile Web access, IP telephony, gaming services, high-definition mobile TV, video conferencing, 3D television and cloud computing. Two 4G candidate systems that have been commercially deployed are mobile WiMAX standard and the first-release Long Term Evolution (LTE) standard.
Expected 5G network visions
Rapid development of wireless technologies coupled with standards convergence herald the emergence of fifth-generation (5G) wireless communication. Broadly speaking, 5G is expected to provide much greater capacity to meet growing user demand resulting from a number of new services compared to 4G.
5G (fifth-generation mobile networks or fifth-generation wireless systems) denotes the next major phase of mobile telecommunications standards beyond the current 4G/IMT-Advanced standards. Experts feel that 5G should be rolled out by 2020 to meet business and consumer demands.
The major difference from a user point of view between 4G and 5G techniques must be something else than increased peak bit rate. It could be higher number of simultaneously-connected devices, higher system-spectral efficiency (data volume per area unit), lower battery consumption, lower outage probability (better coverage), high bit rates in larger portions of coverage area, lower latencies, higher number of supported devices, lower infrastructure deployment costs, higher versatility and scalability or higher reliability of communications.