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Fourth Generation (4G) Mobile Phones
Fourth Generation (4G) mobile phones provides broadband cellular network services and is successor to 3G mobile networks. It provides an all IP based cellular communications. The capabilities provided adhere to IMT-Advanced specifications as laid down by International Telecommunication Union (ITU).
Features
It provides an all IP packet switched network for transmission of voice, data, signals and multimedia.
It aims to provide high quality uninterrupted services to any location at any time.
As laid down in IMT-Advanced specifications, 4G networks should have peak data rates of 100Mbps for highly mobile stations like train, car etc., and 1Gbps for low mobility stations like residence etc.
It also lays down that 4G networks should make it possible for 1 Gbps downlink over less than 67 MHz bandwidth.
They provide have smooth handoffs across heterogeneous network areas.
Categories
4G comes in two main categories −
Long – Term Evolution (LTE)− Long – term evolution or LTE is an extension of the 3G technology. It is a standard for high-speed mobile communication, based upon GSM/EDGE and UMTS/HSPA technologies. The peak data rate for download is 100 Mbps and upload is 50 Mbps. The LTE Advanced meets the specifications of IMT-Advanced standard for 4G technology. Its peak data rates are 1000 Mbps for downlink and 500 Mbps for uplink.
Worldwide Interoperability for Microwave Access (WIMAX)− WiMAX is a mobile wireless broadband access (MWBA) standard is sometimes branded 4G. It offers peak data rates of 128 Mbps for downlink and 56 Mbps for uplink over 20 MHz wide channels. The latest version of WIMAX is not compatible to the earlier versions and instead is compatible with LTE.
Application Areas
Advanced mobile web access
IP telephony
High-resolution high-speed gaming services
Streamed multimedia and data
High-definition mobile TV
Video conferencing
3D television
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