04-04-2012, 09:35 AM
4G WIRELESS SYSTEM
4G WIRELESS SYSTEM.docx (Size: 822.34 KB / Downloads: 48)
ACKNOWLEGMENT
I thank my seminar guide Ms. Pooja Dubey, Lecturer,CERT Meerut , for her proper guidance and valuable suggestions. I am greatly thankful to Mr Manoj Rana, the HOD, Computer Science &Information Technology and other faculty members for giving me an opportunity to learn and do this seminar. If not for the above mentioned people, my seminar would never have been completed
successfully. I once again extend my sincere thanks to all of them.
1.INTRODUCTION
4G (also known as Beyond 3G), an abbreviation for Fourth-Generation, . A 4G system will be able to provide a comprehensive IP solution where voice, data and streamed multimedia can be given to users on an "Anytime, Anywhere" basis, and at higher data rates than previous generations. The international telecommunications regulatory and standardization bodies are working forcommercialdeployment of 4G networks roughly in the 2012-2015 time scale.
There is no formal definition for what 4G is; however, there are certain objectives
that are projected for 4G. These objectives include: that 4G will be a fully IP-based
integrated system. 4G will be capable of providing between 100 Mbit/s and 1 Gbit/s speeds
both indoors and outdoors, with premium quality and high security. Many companies have
taken self-serving definitions and distortions about 4G to suggest they have 4G already in
existence today, such as several early trials and launches of WiMax, which is part of the
formal ITU standard for 3G. Other companies have made prototype systems calling those
4G. While it is possible that some currently demonstrated technologies may become part of
4G, until the 4G standard or standards have been defined, it is impossible for any company
currently to provide with any certainty wireless solutions that could be called 4G cellular
networks that would conform to the eventual international standards for 4G. These confusing
statements around "existing" 4G have served to confuse investors and analysts about the
4 Wireless System Evolution
1xRTT = 2.5G CDMA data service up to 384 kbps
AMPS = advanced mobile phone service
CDMA = code division multiple access
EDGE = enhanced data for global evolution
FDMA = frequency division multiple access
GPRS = general packet radio system
GSM = global system for mobile
NMT = Nordic mobile telephone
PDC = personal digital cellular
PSTN = pubic switched telephone network
TACS = total access communications system
TDMA = time division multiple access
WCDMA = wideband CDMA
BENEFITS
Benefits for Operators:
• Higher bandwidths.
• Lower cost of networks and equipment.
• The use of licence-exempt spectrum.
• Higher capacity and QoS enhancement.
• Higher revenue.
Users:
• Access to broadband multimedia services with lower
cost and where mostly needed.
• Inter-network roaming.