4G network is a fourth generation network which provides fast internet speed and also voice facility. It uses Single carrier FDMA, Interleaved FDMA, Multi-carrier CDMA. Concept of 4G communications is so widely used but still, there are some challenges of this technology. The user spends lots of time online so, there is a need of high-speed internet connectivity . The development of 4G network has provided high-speed internet facilities and voice over the gadget. The 4G network provides higher data transfer rate over 3G spectrum, 4G LTE network is very fast and based network which can touch 100 Mbps of speed. The 4G network has various advantages and disadvantages which include.
features
It supports Ad-hoc as well as Multi-hop networks.
It provides high speed, less cost per bit and high capacity network.
It offers global mobility, scalable mobile networks, service portability .
It provides interactive multimedia, video, voice and wireless internet.
It supports better call admission control techniques.
challenges
Security of the network is a major issue.
Multi-access interfaces, recovery and timing.
Seamless Roaming and seamless transfer of services.
The various issues in the interface with Ad-hoc network should be sorted out.
The Digital to Analog conversation at high data rates, multi-user detection, smart antennas and complex error control techniques provide dynamic routing.
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