4G is the 4th generation of mobile communication providing very high data transfer rates by coalescing WiMax and WiFi technologies. It allows HD data access over the internet without buffering and improves audio/video quality and gaming. Key 4G technologies include OFDMA, MIMO, IPv6, and software-defined radios. 4G networks use eNodeB, MME, and SGW components and provide higher bandwidth and faster response times than 3G. While promising improvements, 4G also faces challenges of higher costs and limited initial availability.

2.  4G-4th Generation of mobile communication.
 A descendant to 2G and 3G technology aiming to
provide the very high data transfer rates.
 Best described in one word “MAGIC”.
 MAGIC Mobile multimedia Anytime
Anywhere Global mobility support, integrated
wireless and personalized services.

3.  3G utilized WiMax &WiFi as separate wireless
technologies
 4G is expected to coalesce these two technologies.
 4G will be able to connect various high speed
networks together.
 In 4G HD data will be made available without much
of a problem over the internet.

4.  The 4G system was originally envisioned by the
Defense Advanced Research Projects Agency
(DARPA).
 The DARPA selected the distributed architecture
and end-to-end Internet protocol (IP), and in peer-
to-peer networking.

5.  Two 4G candidate systems are commercially
deployed:
Mobile WiMax standard
Long Term Evolution (LTE) standard
 Bharti Airtel launched India's first 4G service,
using TD-LTE technology, in Kolkata on April 10,
2012.

6.  4G (LTE) is quicker than 3G
 4G holds:
less buffering
better audio quality
improved gaming experience
streaming services with reduced lag.
 Our 4G Plus network uses the 1800 & 2300 MHz frequency
bands
 Our 3G Plus network uses the 900 & 2100 MHz frequency
bands

7.  There are some components which makes the
successful 4G systems they are:
a) OFDMA
b) MIMO
c) IPv6.0
d) Spectral efficiency of 4G
e) SDR(Software Defined Radio)
f) Smart antennas

8. OFDMA: Orthogonal Frequency Division Multiple Access.
 It captures entire energy
 Only few signals are affected or lost in OFDM while
compared to CDMA in 3G.
MIMO(Multi Input Multi Output):
 improve the communication performance between sender and
receiver
 range, quality of received signal and spectrum efficiency are
high.

9. IPv6.0:
 Allows more address than IPv4.0
 IPv6 each device have own IP address.
SDR(Software Defined Radio):
 A SDR will allow increasing network capacity
at specific time.

10. Smart antenna
 Switched Antenna: Based on the requirement of the
system ,signal is received at any given time.
 Adaptive Antenna: Steer the signal at any direction
of interest ,nullify the interfering signal.

12. UE
eNodeB
SGW(Service gateway)
MME(Mobility Management Entity)
PDN(Packet Data network)

15.  Higher bandwidth
 Better response time. 10 times better then 3G
 Works at 2.6GHz frequency
 Less time to build 4G
 It use the same tower and fiber cables as 3Gs - they
only have to upgrade the towers with 4G components.

16.  New technology which makes it more
expansive than 3G
 It is impossible to make our current equipment
to be compatible with 4G.
 It is available in certain cities within US.

19.  4G will bring a great revolution in mobile
communication.
 The future of 4G is nothing but 5G.

20.  4G technologies was still at research stages in
many of the countries.
 Companies like NTT Do Como Mobile and Nortel
Networks, and Nokia Siemens Networks
successfully demonstrated the working of4G.
 This technology will be deployed in the world
market soon.

21. BY,
I.MADHUMITHAH
T.AMUTHARINI
II M.Sc(CS).,