2. Introduction to wireless
communication
Our ultimate goal is to communicate with
any type of information with anyone, at
anytime, from anywhere. This is possible
with the aid of WIRELESS
TECHNOLOGY
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3. Types of wireless Communication
• Cellular Networks
• Wireless local area network
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4. Cellular Networks
Evolved from mobile telephone as voice
conversation and communication tools for
private and business usesUser
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5. Wireless Local Area Network
Emerged from computer network. It helps
business user to expand their service
areas by using LAN (faster data transport)User
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6. Evolution from 1g to 4g system
• 1g Wireless System :Developed in 1980s
and completed in early 1990’s
• 2g Wireless System :The 2G phase
began in the 1990s and much of this
technology is still in use.
• 3g Wireless System :It was developed in
the late 1990s until present day,Japan is
the first country having introduced 3G
nationally
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7.
8. 3G WIRELESS SYSTEM
• Services include:
– Global roaming
– Superior voice quality and video conference
– Information for web surfing, music, news,
corporate intranet, transportation service etc
– Transmission speeds from 125kbps to 2Mbps
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9. Issues on 3G wireless system
• High input fees for the 3G service licenses
• Inefficient to meet needs of future high-
performance
• Multiple standards for 3G
• Require wider bandwidth
• Lack of coverage because it is still new
service
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10. 4G wireless system
4G technologies are sometimes referred
to by the acronym "MAGIC," which stands
for Mobile multimedia, Anytime/any-where,
Global mobility support, Integrated
wireless and Customized personal
service.
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11. Current Technology
• TDMA :Time Division Multiple Access, is a
technique for dividing the time domain up
into sub channels for use by multiple
devices.
• CDMA :Code Division Multiple Access,
allows every device in a cell to transmit
over the entire bandwidth at all times.
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12. 4G Hardware
• Ultra Wide Band Networks :Ultra
Wideband technology, or UWB, is an
advanced transmission technology that
can be used in the implementation of a 4G
network.
• Smart Antennas :: Multiple “smart
antennas” can be employed to help find,
tune, and turn up signal information
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13. General 4G Services and 4G
Applications
• Localized/Personalized Information
• Organizational services
• Communications services and
applications
• Entertainment services
• Mobile commerce (M-Commerce )
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14. Features of 4G Wireless Systems
• Support interactive multimedia
• User friendliness
• High speed, high capacity and low cost per
bit
• Higher band widths
• Terminal Heterogeneity
• Network Heterogeneity
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15. User and Industry Expectations
• Wireless users can be categorized into
generalized segments :
– The Age segment
– The Internet Usage segment
– The Mobile Professional segment
16. Comparison between 3g and 4g
Major
Requirement 3g 4g
Speed 384 Kbps to 2 Mbps 20 to 100 Mbps
Frequency Band Dependent on country Higher frequency bands (
2-8 GHz)
Bandwidth 5-20 MHz 100 MHz (or more)
Switching Design Basis All digital with packetized
voice
Access Technologies
Circuit and Packet
W-CDMA OFDM and MC-CDMA
17. Conclusion
• 4G will be a Convergence Platform
providing clear advantages in terms of
Coverage, Bandwidth, Power
Consumption, variety of Services,
ranging from Pop-Up advertisements
to Location-Based services and IP
Data casting ones.
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