4G - WIRELESS NETWORK

Content• Wireless network• 3G network• Features of 3G• Advantages and disadvantages• History of 4G• Introduction• Features• Technology used in 4G• Future scope• Comparison 3G and 4G• Conclusion• Reference

WHAT IS WIRELESS NETWORK?

• A wireless local-area network (LAN) uses radio waves to connect devices such as laptops to the Internet and to our business network and its applications.

• When we connect a laptop to a WiFi hotspot at a cafe, hotel, airport lounge, or other public place, we're connecting to that business's wireless network.

Type Coverage Performance

Applications

Wireless PAN

Within reach of a person

Moderate Cable replacement for peripherals

Wireless LAN

Within a building or campus

High Mobile extension of wired networks

Wireless MAN

Within a city High Fixed wireless between homes and businesses and the Internet

Wireless WAN

Worldwide Low Mobile access to the Internet from outdoor areas

3G Network

• Third-generation mobile networks, or 3G, came to the U.S. in 2003. With minimum consistent Internet speeds of 144Kbps, 3G was supposed to bring "mobile broadband.

• " There are now so many varieties of 3G, though, that a "3G" connection can get you Internet speeds anywhere from 400Kbps to more than ten times that.

Features OF 3G

• The main feature of 3G technology is that it supports greater voice and data capacity and high data transmission at low-cost. 3G mobiles can operate on 2G and 3G technologies.

• The second major feature is the security: 3G offers greater security features than 2G like Network Access Security, Network Domain Security, User Domain Security, Application Security.

• Video calls and video conference is another major feature in 3G mobile technology.

Advantages

• Overcrowding is relieved in existing systems with radio spectrum.

• Bandwidth and security are more.• Availability of fixed and variable

rates.• Support to devices with backward

compatibility with existing networks.

• Always online devices – 3G uses IP connectivity which is packet based.

• Rich multi media services are available.

Disadvantages

• The cost of cellular infrastructure , upgrading base stations is very high.

• Needs different handsets.• Roaming and data/voice

work together has not yet been implemented.

• Power consumption is high.• Requires closer base

stations and are expensive.

Why Moves Towards 4G ?

• High spectrum fees for the 3G services.• Health impact because of the electromagnetic waves.• Prices are very high for 3G mobile services.• Expense of 3G phones.• Limitation to meet expectations of applications like

multimedia , full motion video , wireless teleconferencing .

o Wider Bandwidth.

Introduction Of 4G Network

• A 4G system provides mobile ultra-broadband internet access.

• A 4G system does not support traditional circuit switched telephony service, but all internet protocol based communication such as IP telephony.

History Of 4G Network

• The first generation of mobile communications started with the Advanced Mobile Phone Systems (AMPS), which was an analogue system.

• AMPS can be thought of as 1G. From there, we progressed to GSM and CDMA-one and then to UMTS and EV-DO, which are 3G technologies.

• The latest technologies that are regarded as candidates for 4G are LTE . In the case of 802.16m, the candidate for 4G is also known as WirelessMAN Advanced, or WiMAX2.

• LTE progresses through versions known as releases. The latest release that qualifies as being 4G is release 10, often called LTE-Advanced.

Move To 4G …………

• 4G=4th Generation mobile communication.• Data rates (with wide area coverage and significant mobility)=50 to 100 Mbps.• Wider bandwidth.• High security.• Offering any kind of services anytime,anywhere.• End-to-end quality of service.

Features OF 4G Network • Wireless Internet with a bandwidth much wider than the

2G or 3G networks - 100 MHz.• Significantly increased the speed of data transmission - up

to Gbps 1st.

• Calls video conference - with more than 2 speakers, and because the flow of data faster will be less problems, not so often as to break with the 3G.

• The enhanced security features to prevent fraud and theft.• The larger bandwidth for data sharing are relatively

inexpensive

4G Phones

TECHNOLOGIES USED IN 4G

• Smart Antenas for multiple-input and multiple-output(MIMO)

• IPv6• VoIP• OFDM• Software defined Radio(SDR) system

Future scope

• Lifecycle of 4G is expected to be of 15 years.• Fast internet access to both stationery and

mobile users.• 4G can be efficiently combined with cellular

technologies to make consistent use of smart phones and also create video blogs.

Conclusion

• 4g can be describe in one word MAGIC.• True 4G services could come only after 2015.• 4G will open doors to various mobile applications.• Though 4G is facing challenges and problems we

believe that future research will overcome these challenges and integrate newly developed services to 4G networks making them available to everyone , anytime and everywhere.

Reference

• www.4g.co.uk• www.authorstream.com• Wireless communications(T.S.RAPPAPORT)• www.3gpp.org