2G-4G Networks: Evolution of Technologies, Standards, and Deployment
The fourth generation wireless mobile systems, commonly known as 4G. is expected to provide global roaming across different types of wireless and mobile networks, for instance from satellite to mobile networks and to Wireless Local Area Networks (WLAN5). 4G is an all IP-based mobile network using different radio access technologies providing seamless roaming and providing connection via always the best available network. The vision of 4G wireless/mobile systems will be the provision of broadband access, seamless global roaming, and Internet/data/voice everywhere, utilizing for each the most "Appropriate" always best connected technology.