10-11-2012, 05:21 PM
4G Wireless Technology: A Survey Paper
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Abstract
The development of broadband wireless access technologies in recent years was the result of growing demand for mobile Internet and wireless multimedia applications. Mobile communication plays a most important role in telecommunications industry. Through a common wide-area radio-access technology and flexible network architecture WiMAX and LTE has enabled convergence of mobile and fixed broadband networks. Since January 2007, the IEEE 802.16 Working Group has been developing a new amendment of the IEEE802.16 standard (i.e., IEEE 802.16m) as an advanced air interface to meet the requirements of ITU-R/IMT-advanced for 4G systems as well as for the next-generation mobile network operators. Next fourth generation (4G) mobile technology, promises the full mobility with high speed data rates and high-capacity IP-based services and applications while maintaining full backward compatibility. This paper explores 4G wireless system, its features and technologies to fulfill its requirement.
INTRODUCTION
The mobile communication systems and the wireless communication technologies have been improving very fast day by day. Devices continue to shrink in size while growing in processing power. Consumers are demanding more advanced and useful applications. Hence, there is need of capacity improvements in wireless communications[1].In addition; wireless communications is active areas of technology development of our time. Several major cellular wireless communication techniques have been proposed in order to meet these user expectations. From all future 4G systems, the primary expectation is that they provide enormously high data rates to an excessive number of users at the same time. First generation (1G) a wireless network was basically analog cellular systems with circuit switched network architecture. The main challenges of these wireless networks were basic voice telephony, low capacity and limited local and regional coverage.
FOURTH GENERATION NETWORKS
The 4G is a new generation of wireless that replaces the 3G systems. The key features of the 4G infrastructures are accessing information anywhere, anytime, with a seamless connection to a wide range of information and services, and receiving a large volume of information, data, pictures, video, and so on. The future 4G infrastructures integrate various networks using IP (Internet protocol) as a common protocol so that users are in control because they will be able to choose every application and environment. Based on the developing trends of mobile communications, the 4G focus on ensuring seamless service across a multitude of wireless systems and networks and have broader bandwidth, higher data rate, and smoother and quicker handoff. Integrating the 4G capabilities with all of the existing mobile technologies through advanced technologies is key concept.
CONCLUSION
This paper presented a brief description of path to 4G networks, WiMAX and LTE Network architecture and OFDMA technology. It has been observed that the number of wireless broadband subscribers have passed the number of fixed broadband subscribers.So in a world going wireless, the technologies with higher throughputs get importance day by day. For a successful 4G network, coverage and capacity are essential parts.LTE-Advanced and WiMAX 802.16m The possible candidates for a successful 4G deployments are LTE-Advanced and WiMAX 802.16m. So the technology is, it must be affordable in cost and worth deploying in throughput, coverage and capacity.