Long Term Evolution - 4g Technology

Rapid and widespread growth of mobile data usage and emergence of new applications like mobile TV

, Web 2.0, Multi-Media Online Gaming and streaming contents have motivated the technologists to work on the Long Term Evolution (LTE). 4th Generation is also works on this latest standard of mobile technology. LTE will ensure 3GPPs competitive edge over other cellular technologies.

Earlier mobile communication generations like 2.5G and 2.75G used to work on GPRS and EDGE technology.

3rd Generation works on UMTS/HSPA (Universal Mobile telecom Service/High-Speed Packet Access) technology. In this fast evolving era end-users also demand high-speed internet services. Remember that time when we used to download a file, song or image through GPRS or EDGE services we had to face so many problems. At that time the downloading speed used to be 3 to 5 Kbps which is very low. Problems like low internet speed, problem while downloading, connection time out added fuel to fire.

So technologists thought of bringing such a mobile technology to the users as expected. The VOC and other innovative advancements motivated the 3rd Generation Partnership Program (3GPP) to work on LTE standard. With the emergence of Internet Protocol (IP) as the protocol of choice for carrying all types of traffic, LTE is scheduled to provide support for IP-based traffic with end-to-end Quality of service (QoS).

LTEs radio access is called Evolved UMTS Terrestrial Radio Access Network (E-UTRAN). It is expected that it will significantly improve end-user throughputs, sector capacity and decrease user plane latency, bringing substantially enhanced user experience with full mobility. Long Term Evolution (both radio and core network evolution) is now available in the market.

Some of the motivational factors for LTE:

Evade unnecessary fragmentation of technologies for paired and unpaired band operation

Packet Switch optimized system

User demand for higher data rates and Quality of Service (QoS)

Continued demand for cost reduction

Low complexity

Need to ensure the continuity of competitiveness of the 3G system for the future

Benefits of 4G:

Cost-efficiency: The simple architecture involved in this technology helps in reducing its costs.

Flexibility: This technology is able to work at multi-frequency groups and it has flexible bandwidth. This means that service provider is able to set it at any frequency they need, making it very usable. The amount of bandwidth in this type of system can be set to anywhere from 1.25 to 20MHz.

Usability: This network system is very usable as it can be customized to particular spectrum resources, which is much more practical and easier than doing it the other way around.

by: Reema Bajaj

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