4G wireless technology is defined as providing speeds up to 100 Mbps for mobile users and 1 Gbps for stationary users. 4G networks use a collection of technologies to create fully packet-switched networks optimized for high-speed data transmission. The presentation discusses the evolution of wireless technologies from 0G to 4G, highlighting improvements in speed, capacity and digital signaling. Key 4G technologies include OFDM, smart antennas and adaptive modulation to provide faster, more reliable broadband access and support new applications like mobile gaming and sensors. While 4G enables many benefits, it also faces challenges in implementation costs and battery life.

1. 4G Wireless Technology
Presented By
Ankit Lad &
Mayur Chudasama

2. 4G Wireless : Defintion


Defined by the ITU(International
Telecommunication Union).
4G Networks are projected to provide
speed of 100Mbps while moving and
1Gbps while stationary

3. 4G Definition

4G is not one defined technology or
standard, but rather a collection of
technologies at creating fully packetswitched networks optimized for data.

4. 0G (Zero Generation Mobile System)
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At the end of the 1940’s, the first radio telephone
service was introduced, and was designed to
users in cars to the public land-line based
telephone network.

In the 1960’s, a system launched by Bell
Systems, called, Improved Mobile Telephone
Service (IMTS), brought quite a few
improvements such as direct dialing and more
bandwidth. The very first analog systems were
based upon IMTS and were created in the late
60s and early 70s.

5. 1G Technology

1G refers to the first-generation of
wireless telephone technology was
developed in 1970’s.
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1G had two major improvements:
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
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the invention of the microprocessor
the digital transform of the control link
between the phone and the cell site.
Analog signal

6. 2G Technology
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Around 1980’s

Better quality & capacity - More people
could use there phones at the same
time

Digital Signals – consist of 0’s & 1’s

7. Previous Technology - 2G
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Digital – consist of 0’s and 1’s
Digital signal:
1.Low level, 2.High level, 3.Rising edge
and 4.Falling edge


8. Technology - 2G

9. 3G Technology

Large capacity and broadband capabilities

Allows the transmission of 384kbps for
mobile systems and up to 2Mbps

Increased spectrum efficiency –5Mhz


A greater number of users that can be
simultaneously supported by a radio frequency
bandwidth
High data rates at lower incremental cost than
2G–Global roaming

10. Previous Technology - 3G

CDMA –Code Division Multiple Access

Form of multiplexing

Does not divide up the channel by time or
frequency

Encodes data with a special code
associated with each channel

11. Code Division Multiple Access

12. Types of Multiplexing

FDMA – Frequency Division Multiple
Access

Each phone call is allocated one
frequency for the entire duration of the
call

13. Types of Multiplexing

TDMA - Time Division Multiple Access

Each phone call is allocated a spot in the
frequency for a small amount of time, and
"takes turns" being transmitted

14. Types of Multiplexing

CDMA - Code Division Multiple Access

Each phone call is uniquely encoded and
transmitted across the entire spectrum, in
a manner known as spread spectrum
transmission

15. Reasons for New Research

Even though 3G has successfully been
introduced to mobile users, there are some
issues that are debated by 3G providers and
users.
 High input fees for the 3G service licenses

Great differences in the licensing terms

3G phones are expensive

16. Fourth Generation

17. What is 4G?

Fourth Generation Technology










Faster and more reliable
100 Mb/s
Lower cost than previous generations
Multi-standard wireless system
Bluetooth, Wired, Wireless
Ad Hoc Networking
IPv6 Core
OFDM used instead of CDMA
Potentially IEEE standard 802.11n
Most information is proprietary

18. Wireless Technology
Used in 4G

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
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OFDM
UWD
MILLIMETER WIRELESS
SMART ANTENNAS
LONG TERM POWER PREDICTION
SHEDULING AMONG USERS
ADAPTIVE MODULATION AND POWER
CONTROL

19. OFDM(Orthogonal Frequency
Divison Multiplexing)

OFDM, a form of multi-carrier
modulation,works by diving the data stream
for tranmission at a bandwidth B to N
multiple and parallel bit streams, spaced
B/N apart (fifure)

20. Communications Architecture


Broadcast layer:
 fix access points, (i.e.) cell tower
connected by fiber, microwave, or
satellite (ISP)
Ad-hoc/hot-spot layer:
 wireless LANs (i.e. internet at Starbuck’s)

21. Communications Architecture

Personal Layer Gateway:


Info-Sensor layer:


devices that connect to upper layers; cell phone,
fax, voice, data modem, MP3 players, PDAs
environmental sensors
Fiber-optic wire layer:

high speed subterranean labyrinth of fiber optic
cables and repeaters

22. Ad Hoc 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

23. Enhance Mobile Gaming

Experience enhance wireless capabilities
that deliver mobile gaming interaction
with less than five seconds

Play online multi player games while
traveling at high speeds or sitting outside

24. Broadband access in Remote
location
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4G will provide a wireless alternative
for broadband access

I will provide first opportunity for
broadband access in remote locations
without an infrastructure to support
cable or DSL access.

25. Application
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4G car
4G and public safety
Sensors in public vehicle
Cameras in traffic light and traffic
control during selection , etc…

26. Advantages of 4G :
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Support for interactive multimedia voice,
streaming video, internet & other broadband
services.
IP based mobile system
High speed, high capacity & low cost pet bit.
Ad-hoc and multi-hop network
Better spectral efficiency

27. Disadvantages of 4G:
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
Expensive
Bettery uses are more hard to implement
Need complicated hardware

28. Thanking You