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.
The mobile communication
generations has traversed a long way through different phases of evolution
since its birth early in the 1970s. the steady global boom in the number of
mobile users each year has periodically spurned the development of more and
more sophisticated technologies trying to strike the right chord primarily in
terms of provision of seamless global roaming, quality services and high data rate. today numerous different generation technologies with their
individual pros and cons are existing globally. the coming era of 4g systems is
foreseeing a potential smooth merger of all these heterogeneous technologies
with a natural progression to support seamless cost-effective high data rate
global roaming, efficient personalized services, typical user-centric
integrated service model, high Qos(quality of service) and overall stable
system performance. However, every step in such technological advancements
presents huge research challenges. this article aims to focus upon some of
these potential challenges along with different proposed feasible and
non-feasible solutions in the areas of mobile terminals and users, mobile
services, mobile and wireless access networks, and communication, in order to
give an in-depth view of the next-generation communication systems.
Due to the increase in demand for speed,
multimedia support and other
resources, the wireless world
is looking forward for a new generation technology to replace the third
generation. This is where the fourth generation wireless communication comes
into play. 4G wireless
communication is expected to provide better speed, high capacity, lower cost
and IP based services. The main aim of 4G
wireless is to replace the current core technology with a single universal
technology based on IP. Yet there are several challenges that inhibits the progress of 4G and researchers throughout the world are contributing their
ideas to solve these challenges.
This project deals with understanding the features and challenges for 4G.
With
the rapid development of wireless communication networks, it is expected that
fourth-generation mobile systems will be launched within decades. 4G mobile
systems focus on seamlessly integrating the existing wireless technologies
including GSM, wireless LAN, and Bluetooth. This contrasts with 3G, which
merely focuses on developing new standards and hardware. 4G systems supports
comprehensive and personalized services, providing stable system performance
and quality service. However, migrating current systems to 4G presents enormous
challenges. In this article, these challenges are discussed under the headings of
networks and services, software systems and wireless access.
Recent
activity in 4G (fourth generation) mobile communication systems has steeped the
race in its implementation at the earliest. 4G wireless being an upcoming
standard witnesses burgeoning interest amongst researchers and vendor. It is
being designed to allow seamless integration and communication between wireless
devices across diverse wireless standards as well as broadband networks
wirelessly. Access to different radio technologies is facilitated due to
IP-based-4G mobile communication system connecting the user. This paper
attempts to make an assessment in development, transition, and road-map for
fourth generation mobile communication system with a perspective of wireless
convergence domain and future research issues.
