MOBILE COMMUNICATION SYSTEM

4G wireless: One View 4G is the short name for fourth-generation wireless, the stage of mobile communications that will enable things like IP-based voice, data, gaming services and high quality streamed multimedia on portable devices with cable modem-like transmission speeds.

Hyper LAN- set of wireless LAN 1G-First Generation Speech 2G-Second Generation SMS , MMS CDMA , GPRS , EDGE Voice Mail 3G-Third Generation Wireless Internet Video Calling Mobile TV

High transfer rate Internet access any where Ability to move around with the same IP address Utilization of Smart antennas High resolution Mobile TV

TECHNOLOGY USED IN 4G OFDM UWB Smart antennas IPv6

OFDM Time domain Space domain Frequency domain

UWB(ULTRA WIDE BAND) An advanced technology that can be used in 4G technology. It is typically detected as noise. It can use any part of the frequency spectrum, which means that it can use frequencies that are currently in use by other radio frequency devices . It uses a frequency of3.1 to 10.6 Hz. It uses less power , since it transmits pulse instead of continuous signal. Special antennas are needed to tune and aim the signal.

Smart Antennas Switched Beam Antennas Adaptive Array Antennas Smart antennas can : Optimize available power Increase base station range and coverage Reuse available spectrum Increase bandwidth Lengthen battery life of wireless devices

Mobile IPv6 –Keep IP address even if you change access point. More addresses than current version of IP protocol (Version 4) each device can have own IP –Keep IP address even if you change access point. –Presently translate IP with each change because not enough IP addresses to go around. IP Core-everything can talk to each other if they speak the same “language”.

FEATURES OF 4G Adhoc Networks: Spontaneous self organization of networks of devices. Not necessarily connected to internet. 4G will create hybrid wireless networks using Ad Hoc networks. Form of mesh networking–Very reliable.

APPLICATIONS OF 4G Virtual presence Virtual Navigation Tele-Geoprocessing: GIS,GPS Tele-Medicine and Education Crisis Management

ADVANTAGES AND DISADVANTAGES OF 4G • High usability: anytime, anywhere, and with any technology. • Support for multimedia services at low transmission cost. •Higher bandwidth, tight network security. Disadvantages: The equipment required to implement a next generation network is still very expensive. Carriers and providers have to plan carefully to make sure that expenses are kept realistic.  

FUTURE Less expensive Flexibility LAN & WAN Technologies

CONCLUSION All totally the best way to help all users is to use 4G as the next wireless system and in totally it is safety and secure for public, this the need that demands the solution. Today’s wired society is going wireless and if it has problem, 4G is answer.

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