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5G is the fifth generation of wireless networks which is a new global standard after 4G. This technology is designed in such a way that it can connect everything and everyone virtually into one frame. It will offer data rates in multi-Gbps data speeds, more reliability than the previous generation, and is able to connect massive devices together, increased availability, and can give a good user experience. 5G will have an impact on every business and industry because it will offer more data rates, high reliability, and low latency which will be beneficial for various industries like logistics, remote healthcare, precision agriculture, and many more. 5G is designed to have the ability so that it can have the flexibility to support future services which are yet to be discovered. 5G will provide enhanced mobile broadband access, mission-critical communications, and massive IoT( Internet of things). 5G can also deliver much lower latency for uniform user experience so that the data rates stay constantly high even when the users are moving.
It is the fourth generation of wireless communications technology. 4G can provide data throughput of 1 Gbps for stationary users and 100 Mbps for high mobility users, it can provide low latency and high reliability in the network with the benefit of clear HD voice calls as well. 4G is based on OFDM ( Orthogonal Frequency division multiple Access ) technologies instead of the WCDMA concept which was used by 3G systems. In OFDM technology, the digital signal is split into different narrow-band frequencies which are modulated by data streams and then re-multiplexed to create the OFDM carrier. 4G technology can provide a broadband experience to users with good upload and download speed on their mobile devices. It can provide applications like mobile web access, IP telephony, HD video calls, video surveillance, video calling, interactive services, 3D television, etc. The first release of 4G was LTE (Long term evolution) followed by LTE-Advanced and LTE-Advanced Pro. various releases were there to meet all IMT specific requirements like 4G core network should be all IP based packet, it should be able to share the network resources so that there will be more users per cell, it has scalable bandwidth concept rather than fixed bandwidth which was there in 2G and 3G technologies, scalable bandwidth as 5 - 20 MHz which could be expanded up to 40 MHz optionally with carrier aggregation. It has a hard handover which means it should provide smooth handovers across heterogeneous networks.