Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Abhishek 1G- 4G Technology


Published on

  • Be the first to comment

  • Be the first to like this

Abhishek 1G- 4G Technology

  2. 2. What is network? A network is a group of two or more computer systems or mobile system linked together.
  3. 3. What is 1G wireless technology?  1G was introduced in 1980. The main difference between then existing systems and 1G was invent of cellular technology and hence it is also known as First generation of analog cellular telephone. In 1G wireless technology the network contains many cells (Land area was divided into small sectors, each sector is known as cell, a cell is covered by a radio network with one transceiver) and so same frequency can be reused many times which results in great spectrum usage and thus increased the system capacity i.e. large number of users could be accommodated easily.
  4. 4. 1G WIRELESS ADVANTAGE  Using Analog signals  Listen to handset  Frequency typically 150MHz & above
  5. 5.  Poor voice quality  Poor battery life  Large phone size  No security  Frequent call drops  Limited capacity and poor handoff reliability.
  6. 6. 2G phones using global system for mobile communications (GSM) were first used in the early 1990 s in Europe. GSM provides voice and limited data services and uses digital modulation for improved audio quality. Digital AMPS(Advanced Mobile Phone System) , CDMA were some of the 2G systems.
  7. 7.  o Phone calls/ Fax o Voice mail o Send/Receive e-mail messages o web browsing o camera phones o speed: 64-144 kb/sec o Time to download a 3 min MP3 song: 6-9 min
  8. 8. . -Network  3G is the third generation of mobile telecommunication.3G networks support services that provide an information transfer rate of at least 200 kbit/s. Later 3G releases, often denoted 3.5G and 3.75G, also provide mobile broadbandaccess of several Mbit/s to smartphones and mobile modems in laptop computers.
  9. 9. 3G finds application in wireless voice telephony,mobile, Internet access, fixed wireless Internet access, video calls and mobile TV.
  10. 10. To meet the growing demand in network capacity, rates required for high speed data transfer and multimedia applications , 3G standards started evolving. It is based on the International Telecommunication Union (ITU) family of standards. 3G technologies enable network operators to offer users a wider range of more advanced services. Services include wide-area wireless voice telephony, video-calls and broadband wireless data , all in a mobile environment. The data are sent through the technology called Packet switching.Voice calls are interpreted through circuit switching.
  11. 11. 3G technology has taken the gaming to the next level. Real-time multiplayer gaming is possible in 3G system. Innovative new services are being added by developer daily.
  12. 12. Also known as “Mobile Broadband Everywhere” One of the terms used to describe 4G is: Mobile Multimedia Anytime Anywhere Global mobility Support Integrated wireless solution and Customized personal service.
  13. 13. Faster and more reliable – 100 Mbps Lower cost than previous generations. Multi-standard wireless system - Bluetooth , Wifi Coverage of wide area. Wide Variety of services capability. Ad Hoc networking IPv6 core Potentially IEEE standards 802.11 Only packet switching used unlike previous generations. OFDMA(Orthogonal Frequency Division Multiple access) and MIMO(Multiple In Multiple Out) replace CDMA spread spectrum radio technology.
  14. 14. Specifications 3G 4G Frequency band 1.5- 2.8 GHz 2-8 GHz Band width 5-20 MHz 5-20 MHz Data rate upto 2 Mbps 20 Mbps or more Access wideband CDMA Multi-carrier-CDMA FEC Turbo codes concatenated codes Switching Circuit/ Packet Packet Top speeds 200kmph 200kmph
  15. 15. ADVANTAGES OF 4G High usability: anytime, anywhere and with any technology. Support for multimedia services at low transmission cost. Higher bandwidth , tight network security. DISADVANTAGES OF 4G The equipment required to implement a next generation network is still very expensive. Carriers and providers have to plan carefully to make sure that expenses are kept realistic.