4G WIRELESS TECHNOLOGY

ABSTRACT:

      The approaching 4G (fourth generation) mobile communication systems are projected to solve still-remaining problems of 3G (third generation) systems and to provide a wide variety of new services, from high-quality voice to high-definition video to high-data-rate wireless channels. The term 4G is used broadly to include several types of broadband wireless access communication systems, not only cellular telephone systems. One of the terms used to describe 4G is MAGIC—Mobile multimedia, anytime anywhere, Global mobility support, integrated wireless solution, and customized personal service. As a promise for the future, 4G systems, that is, cellular broadband wireless access systems have been attracting much interest in the mobile communication arena. The 4G systems not only will support the next generation of mobile service, but also will support the fixed wireless networks. This paper presents an overall vision of the 4G features, framework, and integration of mobile communication. The features of 4G systems might be summarized with one word—integration. The 4G systems are about seamlessly integrating terminals, networks, and applications to satisfy increasing user demands. The continuous expansion of mobile communication and wireless networks shows evidence of exceptional growth in the areas of mobile subscriber, wireless network access, mobile services, and applications.

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CONCLUSION

As the history of mobile communications shows, attempts have been made to reduce a number of technologies to a single global standard. Projected 4G systems offer this promise of a standard that can be embraced worldwide through its key concept of integration. Future wireless networks will need to support diverse IP multimedia applications to allow sharing of resources among multiple users. There must be a low complexity of implementation and an efficient means of negotiation between the end users and the wireless infrastructure. The fourth generation promises to fulfill the goal of PCC (personal computing and communication) a vision that affordably provides high data rates everywhere over a wireless network.

The provision of megabit/s data rates to thousands of radio and mobile terminals per square kilometer presents several challenges. The key enablers are:

• Sufficient spectrum, with associated sharing mechanisms.

• Coverage with two technologies: parent (2G, 3G, and WiMAX) for real-time delivery, and discontinuous Pico cell for high data rate delivery.

• Fixed-mobile convergence (for indoor service).

• Network selection mechanisms.

All totally the best way to help all users is to use 4G as the next wireless system and in totally it is safety and secure for public, this the need that demands the solution.Today’s wired society is going wireless and if it has problem, 4G is answer.