Introduction to Presentation on 4G Wireless Systems:
This document contains explanation about the 4G wireless system. This technology helps us to stay connected through wireless internet anywhere, anytime. The document covers the following topics about 4 G wireless technologies.
4 G architecture and features. 3G v/s 4G. Physical a nd MAC layer specifications. Channel access and error controlling coding, some new challenges in 4G.
History Of Wireless System
The first generation of mobile telecommunication is known as 1G. 1G provided primarily communication for voice. Second generation of wireless communication uses TDM, FDM, and CDMA. 3G was introduced to make the ease of teleconferencing and provide ease in accessing internet and many other services.
Introduction to 4g
4G was introduced to provide a Wide Area Network for internet access and which cover the area of around kilometers. It provided high bandwidth and broadband to stay connected to world anywhere and anytime.
4G architecture contains following components RAN, GWY, and PTSN and legacy cellular. The network of 4G contains base station, RNC, and access GWY.
Features of 4g
a.) High speed internet, high capacity, and lower in cost.
b.) It provides support for multimedia, voice, wireless internet.
c.) It provides global mobility, portable service, scalability in mobile networks.
d.) Ad – hoc networks and multiple – hop networks.
Difference between 3G AND 4G
a.) Frequency band provided by 3G is 1.8 – 2.5 GHz and that by 4G is 2 – 8GHz.
b.) Bandwidth provided by both the technologies is same.
c.) Mobile top speed provided by 3G is 200kmph and for 4G is 200kmph.
d.) Data rate provided by 3G is 2Mbps and 4G 210Mbps.
The channel access provided for 4G should be clean and clear. The resources should be distributed fairly to all the users.
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