4G: FUTURE GENERATION MOBILE

ABSTRACT:

           In the area of mobile systems, things usually are discussed 10 years in advanced. So for the aim of beginning 4G around 2010, it is the time to discuss 4G now. This paper describes architecture for heterogeneous wireless-wired networks. This architecture applies an “all-IP” paradigm, with embedded mobility of users and is able to provide quality of service per-user and per-service. On the way to 4G-system architecture, major issues like requirements, adaptability are considered. 

FREE SPACE OPTICS

ABSTRACT

Free space optics ( FSO ) is a line-of-sight technology that currently enables optical transmission up to 2.5 Gbps of data, voice, and video communications through the air , allowing optical connectivity without deploying fiber optic cables or securing spectrum licenses. FSO system can carry full duplex data at giga bits per second rates over

Metropolitan distances of a few city blocks of few kms. FSO, also known as optical wireless, overcomes this last-mile access bottleneck by sending high –bitrate signals through the air using laser transmission .