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3G And 4G

Advancements in the mobile communication industry are changing the way we live our daily lives. “Researchers and technology leaders envision a future immersed in wireless communication that will play a pivotal role in realizing this Network Utopia — a world of smart, intercommunicating everything.”[1][2] 3G, 4G and beyond networks are already taking the first steps toward achieving this goal.

3G systems allow the use of speech and data services together and have higher data rates compared to 1G and 2G, with speeds of up to 14Mbit/s. 4G systems will be an all IP based solution seeing data rates of up to 100Mbit/s – 1Gbit/s for mobility. Even though at the moment 4G systems have not been implemented, the race to develop a 5G mobile communication system has begun. 5G systems will have flatter architecture than 4G and be completely wireless with no limitations. The paper will focus on how the limitations of 1G and 2G networks has led to the development of 3G and 4G, and looks at existing and proposed mobile systems architectures. The review will show that wireless technology is moving towards allowing a user to communicate with anyone, at anytime anywhere.

High Data Transfer Rates: Stationary devices will have data rates of up to 2.05Mbits/s, for devices moving slowly data rates of 384Kbits/s will be available and for devices that are being moved fast will have data transfer rates of 128 Kbits/s.Broader bandwidth: Allow the use of speech and data services together and so can combine voice telephony, IP services and offer many different services. Better Security: Compared to 2G networks the security for 3G systems is much more advanced especially by allowing the User Equipment to check and authenticate to the network it is trying to join. Devices have backward compatibility with existing networks.

4G networks are expected to be built on existing

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