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In this review paper states that there is a rapid advancement in wireless communication technology providing the network services anywhere and anytime. 4G communication systems are being developed to solve the various problems the current communication systems (3G, 2.5G) are facing.4G will be an intelligent technology that will reduce the number of different technologies to a single global standard. Based on the study, 4G mobile technologies is in a determining and Standardization stage. Since 4G is still in the cloud of the sensible standards creation, ITU and IEEE form several task forces to work on the possible completion for the 4G mobile standards as well. 3GPP LTE is an Evolution standard from UMTS, and WiMAX is another candidate from IEEE form. These technologies have different characteristics and try to meet 4G characteristics to become a leading technology in the future market. Under these circumstances, this paper will present about the current trends and its underlying technologies to implement the 4G mobile technology. This paper also shows some of the possible scenarios that will benefit the 4th generation technology.
Recently, we have witnessed the roll out of LTE (Long Term Evolution, or so called 4G) servicesfrom major US telcos, such as VERIZON, AT&T, T-Mobile, etc. These broadband wireless services claim to surpass current 3G cellular networks, paving the way to true wide area mobility,multimedia services while on-the-go and greater interactivity. In this white paper, we present the technical aspects of Long Term Evolution, its architecture, and its differences with earlier 3G systems.