6. In telecommunications, The The aim is
4G is the fourth technology to achieve
generation of cell phone is currently “ultra
mobile communications available in broadband
standards. It is a successor some speed” –
of the third generation countries to be
(3G) standards, will soon but it is counted in
become the standard for still being gigabytes
cellular wireless. perfected. per
second.
7. Will allow users to
ITU designed 4G in download a full-length
2002 with the official feature film within five
name “3G Long-Term minutes.
Evolutions” or 3.9G.
4G is adoption of packet
switching instead of circuit Will also be able to
switching in voice and video calls. stream high-definition
With packet switching, resources
are only used when there is television and radio to
information to be sent across 4G hand-held devices.
uses spiral multiplexing.
8. The first commercial deployment was
by Telia Sonera and
NetCom.
Telia Sonera branded the network
“4G”.
The modem devices on offer were
manufactured by Samsung (dongle GT-
B3710).
The network infrastructure were
created by Huawei (in Oslo) and
Ericsson (in Stockholm).
9.
10. Except for the Scandinavian countries, a few
countries have started the 4G commercially.
In the US, Sprint Nextel initiated the service
last year.
Countries expected to launch 4G by this
year are Germany, Spain, China, Japan and
England.
11. There are three primary technologies that support 4G – WiMax,
LTE, and UMB.
The main doubt is whether to implement WiMax or LTE.
The advantages of LTE are:
(i) Faster speed with 100 Mbps for download and 50 Mbps
for upload.
(ii) It makes CDMA and GSM database.
(iii) It offers both FDD and TDD duplexing.
12.
13. WiMax technology might not achieve
the required rate in a high-density area.
However, WiMax technology becomes
useful when it is bundled with IPTV.
The wireless bandwidth will be
roughly 3Mbps/1.5Mbps; but this is
nowhere near the +100Mbps/50Mbps
that LTE promises.
14. Has already begun the process of introducing
4G
India is among the latecomers in 3G.
It is felt that by the time the implement 3G
fully, 4G technologies such as LTE will be
available commercially.
It has taken three years for the government to
decide on 3G-spectrum policy.
4G could face the same delay unless India
wants to catch up with the rest of the world.
15. Life-Saving: Telemedicine
Crisis Management
Video Conferencing
Telegeoprocessing: GIS,GPS
Better Usage of Multimedia Applications
Voice over Internet Protocol (VoIP) for IPv6
16. TECHNOLOGY 3G 4G
Data transfer rate 20MB/S 1GB/S
Internet services Broadband Ultra broadband
Mole TV resolution Low High
Band width 5-20 MZ 100+MZ
Frequency 1.6-2GHZ 2-8GHZ
Network architecture Wide area network Hybrid network
Download 14MB/S 100MB/S-1GB/S
Upload 5.8MB/S 50MB/S
18. Wireless systems are
becoming an important
infrastructure in our
society. A virtual global
system is a good solution
that can efficiently
connect many dedicated
wireless systems
including 2G to 4G
cellular systems, wireless
LAN,broadcasting
systems, etc.
