4G
4G : (ICT) (TEL) stands for the fourth generation of cellular wireless standards. It is a successor to 3G and 2G families of standards. Speed requirements for 4G service set the peak download speed at 100 Mbps for high mobility communication (such as from trains and cars) and 1 Gbps for low mobility communication (such as pedestrians and stationary users). A 4G system is expected to provide a comprehensive and secure all-IP based mobile broadband solution to smart phones, laptop computer wireless modems and other mobile devices. Facilities such as ultra-broadband Internet access, IP telephony, gaming services, and streamed multimedia may be provided to users. Pre-4G technologies such as mobile WiMax and first-release 3G Long term evolution (LTE) have been available on the market since 2006 and 2009 respectively, and are often branded as 4G. Current versions of these technologies do not fulfill the ITU Radiocommunication Sector requirements of data rates approximately up to 1 Gbps for 4G systems, however marketing materials in Sweden, the United States, etc., continue to use 4G as a description for WiMax and LTE in their current Pre-4G forms
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