4G technologies are geared towards flawless network coverage. This technology is aimed to provide high quality of service to end users without dropping signals. The major problem with the wireless technologies is their signal attenuation. International telecommunication union, which is monitoring the international standards for wireless communication is demanding considerable improvement in multi media services over the cellular network. They require improvement in multimedia message services and video streaming in order to support 4G. This network technology is expected to provide 100megabits per second for mobile users, while 1GBps for fixed users. This network is also forecasted to provide interrelated roaming throughout the world. It is also predictable that this technology would be attuned to all types of wireless devices like wireless adapters, express cards and many more. The infrastructure of 4G will follow all the standards of previous generations.
4G network is based on IPv6 support rather than IPv4. it is IPv6 which is supports network devices. Increased number of IP addresses also removes the need for NAT (network Address translation). NAT is a term referred to sharing minimum IP addresses with larger number of devices. Besides this improvement Nat would also has to communicate with the other devices on the previous IPv4 devices. 4G has also brought improvements in network infrastructure. For example 3G used both circuit switched and packet switched network nodes, while 4g is merely based on packet switching, hence lowering the latency of data. The basic 4G standards include LTE advanced and 802.16m.
Objectives of 4G:
This wonder technology is expected to cover the data rate deficiency in previous generations. It is also aimed to achieve quality of services. This technology would provide many multimedia services. These multimedia services would not only include voice chat and video calls but also includes MMS, HDTV, video chat, and voice over the internet. This network would allow interactive roaming with existing LAN and digital broadcasting systems. This network's goal is to provide 100MBps data rate for moving customers and 1GB for stationary users.. So that the users can enjoy uninterrupted connectivity with high speed anywhere they go. Very smooth handover over heterogeneous networks. Flawless connectivity and international roaming across innumerable networks of the world is its next target. It should also provide Very high quality multimedia support in order to get approval from ITU. The interoperability with existing network infrastructure is another prominent feature of this technology. It is an all IP switched network and several working groups propose that it should offer an open internet protocol. The early 4G technology comprise of flash OFDM, 802.16e, wireless or mobile WiMax and HC SDMA. The demand of the wireless network users combined with the efforts of the 4G working groups would give technology and edge over its previous counterparts. This technology would revolutionize the world of cellular networks with amazing wireless broadband speed. This technology would also provide job opportunities for many. The further development for supporting 4G network is dependent upon the approval from ITU.