Wireless network ppt


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Wireless phone standards have a life of their own. You can tell, because they are spoken of reverently in terms of generations. There's Great-Granddad, whose pioneering story pre-dates cellular; Grandma and Grandpa 1G, or analog cellular, Mom and Dad 2G, or digital cellular; 3G wireless, 4G, 5G and so on. This is a survey report PPT on these technology.

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Wireless network ppt

  1. 1. BASIL JOHN III-YEAR B.Tech E.C.E Bharathiyar College Of Engineering and Technology,Karaikal,Pondicherry. 1
  2. 2. • YEAR ENROLLED: 2011 • LOCATION: KERALA • AREAS OF INTEREST: Electronic Devices, wireless communication, Basic Electronics, Digital Electronics. • OTHER INTERESTS: Sports (badminton, fitness exercises), watch TV series and movie. • E-mail: basiljohn008@gmail.com • SOCIAL: • www.facebook.com/Basilubasu       • www.plus.google.com/u/0/+BASILJOHN • http://www.linkedin.com/profile/view?id=330009212 04/21/14 2
  3. 3.  Introduction  Communication Devices  Wireless System Evolution  1G - 5G Wireless Systems  Types of networks  Wireless PAN  Wireless LAN  Wireless MAN  Wireless WAN  Communication in India  Conclusion
  4. 4. Telecommunications - is the key enabler of economic and social development of a nation - increase the efficiency of commercial and administrative activities - improve the effectiveness of social and emergency services - distribute the social, cultural and economic benefits of the process of development more equitably throughout the country - provides universal service for rural and remote communities
  5. 5. Tablet PC Watch mobile PhoneKindle- e book reader Cell Phone Handheld device
  6. 6. 1)Fixed and Wired (e.g.) desktop uses fixed networks 2)Mobile and Wired (e.g.) Laptop connected using telephone and modem 3)Fixed and Wireless (e.g.)a network in historical buildings 4)Mobile and Wireless (e.g.) Cellular network
  7. 7.  Communication without wires  Wires are replaced by electromagnetic waves  electromagnetic waves carry a signal through atmospheric space  use radio frequency RF waves, which ranges from 3 kHz to 300 GHz  or infrared IR, which ranges from 3 THz to 430 THz
  8. 8. Electromagnetic Spectrum Showing Radio Frequency
  9. 9. Two types of mobility: i)Device portability ii)User Mobility no mobility high mobility mobile wireless user, using same access point mobile user, passing through multiple access point while maintaining ongoing connections mobile user, connecting/ disconnecting from network Mobility Spectrum
  10. 10. Walking Users Low speed Small roaming area Usually uses high-bandwidth Vehicles High speeds Large roaming area Usually uses low-bandwidth Uses sophisticated terminal equipment (cell phones)
  11. 11. Wireless Icon Wireless Router Semi Parabolic AntennaData card
  12. 12. 1. Regulatory Authorities 2.The operator or the Service Provider 3. The user or the subscriber 4.Equipment Vendors (network equipment and user device) 5. Research Organizations
  13. 13. Appeared in late 1970s and deployed in early 1980s All based on analog techniques All used FDMA Operates at 450-900 MHz frequency band System capacity is low  Data rate is <10 kbps
  14. 14. The geographical area divided into cells Each with own antenna Each with own range of frequencies Served by base station - Transmitter, receiver, control unit to carry out actual radio communications with the device Adjacent cells on different frequencies to avoid crosstalk Mobile Switching Center Controls all calls attached to this device, Maintains billing information &Switches calls PSTN Public Switched Telephone Network
  15. 15. Base station Mobile Switching Centre PSTN
  16. 16. AMPS: Advanced Mobile Phone System - by AT&T Bell Labs in 1970s deployed in 1983 -the number of users that can be supported was limited. -used all over the world & popular in South America, China and Australia. ETACS: European Total Access Communication Systems. - channel bandwidth is scaled to 25 kHz instead of 30 kHz as in AMPS.
  17. 17. Deployed in mid 1990s Fully Digital network elements TDMA/CDMA for spectrum sharing; Circuit switching Operates at 900-1800 MHz frequency band 3-times increase in overall system capacity. supported voice-centric services and limited data-service, like short messages(SMS), FAX, etc. <9.6 kbps data rates
  18. 18. GSM (Global System for Mobile communications) - TDMA system, serves as the pan-European cellular service, provides a wide range of network service, including phone service, FAX, short message service. Support 24.7 kbps data rate. USDC IS-136 (United States Digital Cellular) -a TDMA system, similar to AMPS, it supports more users (6 times) with improved performance. Provides access to VPN, supports short messages. Support 48.6 kbps data rate. IS-95 (United States Digital Cellular Standard ) -a CDMA standard also designed to be compatible with AMPS through using of CDMA/AMPS dual mode phones and base stations. Capacity is 8~10 times that of AMPS. Support 14.4 kbps data rate.
  19. 19. BSCBTS Base transceiver station (BTS) Base station controller (BSC) Mobile Switching Center (MSC) Mobile subscribers Base station system (BSS) Legend 2G (voice) network architecture MSC Public telephone network Gateway MSC G
  20. 20. 2G is developed for voice communications We can send data over 2G channels by using modem Increased data rates are required for internet application
  21. 21. Compared to 2G systems 2.5G provide high speed data communications and continuous connection to internet Fully Digital <115kbps data rates  GSM to GPRS; Analog AMPS to CDPD Services: 1.WAP(Wireless Application Protocol) access 2.MMS (Multimedia Messaging Service) 3.Internet communication service like web,email
  22. 22. CDPD (Cellular Digital Packet Data), a data service for 1st and 2nd generation US cellular systems without additional bandwidth requirement, packet channels are dynamically assigned to idle voice channels. Support 48.6kbps data rate as in IS-136. GPRS(General Packet Radio Service), based on GSM by allowing multiple slots of a GSM radio channel be dedicated to an individual user, promises data rate from 56 kbps to 114kbps---continuous connection to the Internet for mobile phone and computer users, easy access to VPN (Virtual Private Network). EDGE (Enhanced Data Rates for GSM Evolution), providing 384kbps rate by using improved modulation and relaxed error control. Also referred to as EGPRS. CDMA one (IS-95B): Providing high speed data access on a common CDMA radio channel by dedicating multiple orthogonal user channels for specific users or specific purposes. Support 115.2kbps.
  23. 23. 2.5G (voice+data) network architecture BSC MSC SGSN Public telephone network Gateway MSC G Serving GPRS Support Node (SGSN) Gateway GPRS Support Node (GGSN) Public Internet GGSN G The new cellular data network voice network & data network operates in parallel
  24. 24. Simultanous voice and data transmission Faster Internet access -Interactive web sessions Video calling Multimedia Content - voice, data & video Universal global roaming 384kbps while moving 2Mbps when stationary 3G phones Apple I phone 3G, LG KF 750, Nokia 5800 express music, Blackberry bold 9000
  25. 25. IS-95B CDMA 2G 3G cdma2000 GSM FDD TDD W-CDMA GPRS IS-136 TDMA UWC-136 EDGE & 136 HS outdoor 136 HS indoor 2.5G
  26. 26. UMTS (Universal Mobile Telecommunications System) - 3GPP -A wideband CDMA (5MHz) standard based on the network fundamentals of GSM/EDGE, is designed to provide backward compatibility with GSM, IS-136, GPRS and EDGE. Can support 2Mbps data rate. New RF equipment needed. CDMA 2000 - 3GPP2 Use same bandwidth as IS-95 or 3 adjacent 1.25MHz channels (3-times bandwidth as that of IS-95) to provide instantaneous packet data access at 144kbps or 2Mbps. No additional RF equipment needed, changes are all made in software or baseband hardware. TD-SCDMA (Time-division Synchronous CDMA) A standard proposed by CATT (China Academy and Telecommunications Technology) and Siemens Corporation. Relies on the existing GSM infrastructure and allows 3G data access by adding high data rate equipment (smart antennas) at each GSM station. Support up to 384kbps of packet data
  27. 27.  Highly integrated  High bandwidth / high-speed wireless  Highly compatible with wired network infrastructures provides mobile ultra-broadband Internet access Integration of multi-networks using IP technology applications include mobile web access, IP telephony, gaming services, high-definition mobile TV, video conferencing and 3D television.
  28. 28. commercially deployed: i) the Mobile WiMAX standard & ii)Long Term Evolution (LTE) standard In Australia, Telstra launched the country's first 4G network (LTE) in September 2011 claiming 2–40 Mbps speeds In India, Bharti Airtel has launched India's first 4G service using TD-LTE technology in Kolkata on 10 April 2012.
  29. 29. 4G Modem 4G smart phone 4G LTE Tablet
  30. 30. Indian Telephony Telephone Subscribers (Total) (2012) 960.9 million (May 2012) Fixed lines (May 2012) 31.53 million Mobile phones (2012) 929.37 million Monthly telephone additions (Net) (May 2012) 8.35 million Teledensity (2012) 79.28 % Rural Teledensity 33% Projected teledensity by 2012 84 % Courtesy: wikipedia.org
  31. 31. Internet access Percent household access (total), 2012 10.2% of households (137 million)) Percent broadband household access 1.18% of households (14.31 million) Broadband internet users 14.31 million (May 2012) Internet Service Providers (2012) 155 country code top-level domain .in Courtesy: wikipedia.org
  32. 32. Revenue Revenue (Total) USD 33,350 million Courtesy: wikipedia.org