Published on

  • Be the first to comment

  • Be the first to like this

No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide


  2. 2. Wireless Internet Demo,1983,inContentId%2B0900940380006241-inLocaleId%2B1,00.html+Wireless+Internet,+Demo&hl=en&ie=UTF-8
  3. 3. Evolution of Mobile Communication <ul><li>First Generation (1G)- Analog Cellular </li></ul><ul><li>Second Generation (2G)- Digital Cellular </li></ul><ul><li>2G to 3G - PCS/GSM/GPRS </li></ul><ul><li>3G -Europe (UMTS) </li></ul><ul><li> -Japan (DoCoMo) </li></ul><ul><li>- US ? </li></ul><ul><li>4G 2 Mb/s to 155 Mb/s </li></ul>
  4. 4. 3 G User Services <ul><li>short message chat </li></ul><ul><li>E-mail </li></ul><ul><li>Internet pages (shortened versions) </li></ul><ul><li>live videos (small screen) </li></ul><ul><li>high quality music </li></ul>
  5. 5. ITU’s View of Third-Generation Capabilities <ul><li>Voice quality comparable to the public switched telephone network </li></ul><ul><li>144 kbps data rate available to users in high-speed motor vehicles over large areas </li></ul><ul><li>384 kbps available to pedestrians standing or moving slowly over small areas </li></ul><ul><li>Support for 2.048 Mbps for office use </li></ul><ul><li>Symmetrical / asymmetrical data transmission rates </li></ul><ul><li>Support for both packet switched and circuit switched data services </li></ul>
  6. 6. ITU’s View of Third-Generation Capabilities <ul><li>An adaptive interface to the Internet to reflect efficiently the common asymmetry between inbound and outbound traffic </li></ul><ul><li>More efficient use of the available spectrum in general </li></ul><ul><li>Support for a wide variety of mobile equipment </li></ul><ul><li>Flexibility to allow the introduction of new services and technologies </li></ul>
  7. 7. Wireless Technology Future Carrier/Telephone Perspective
  8. 8. Circuit Switched Wireless Internet (2.5 G)
  9. 9. GPRS (Circuit Switched Data) 2.5 G
  10. 10. Table: Information Data Rate for 3G
  11. 11. Wireless Application Protocol (WAP) <ul><li>Set of protocols intended to implement wireless Internet with cut down page content to operate on small screens </li></ul><ul><li>microbrowser is a thin client able to fit in a limited amount of memory </li></ul><ul><li>Instead of TCP (unsuitable for wireless) substitutes a Wireless Transaction Protocol (WTP) </li></ul>
  12. 12. WAP (continued) <ul><li>Includes security based upon Secure Socket Layer (SSL) </li></ul><ul><li>Independent of air interface (e.g. CDMA, TDMA etc.) </li></ul><ul><li>European method, 64 Kbps </li></ul><ul><li>Developed by WAP forum: (Europe) </li></ul><ul><ul><li> </li></ul></ul>
  13. 13. Over 50 Million WAP Devices Shipped Worldwide: <ul><li>Alcatel One Touch View </li></ul><ul><li>Ericsson MC218 </li></ul><ul><li>Ericsson R 320 </li></ul><ul><li>Motorola L Series </li></ul><ul><li>Nokia 7110 </li></ul><ul><li>Panasonic GD 90 </li></ul><ul><li>Phillips - Xenium 9@9 </li></ul><ul><li>Siemens S 35i’s </li></ul><ul><li>Sony CMD-Z5 </li></ul>
  14. 14. Use of Data on Wireless Phones <ul><li>As many as 80%-90% of corporate users that purchased WAP-enabled phones have abandoned the data capabilities of these phones and are using them for voice communications only. Up to 75% of corporate users in Europe and Asia have stopped using the Internet connectivity of their wireless phones. (Meta Group, 5/2001.) </li></ul>
  15. 15. 3 G Europe costs <ul><li>In the UK, , BT, Orange and Vodafone between them paid a cool $34 billion for licenses to operate a brand new type of mobile telephone system - 3G </li></ul>
  16. 16. Japan: NTT DoCoMo i- mode <ul><li>Wireless Internet, 25,000 sites </li></ul><ul><li>Speed: 9.6 Kb/s </li></ul><ul><li>Eleven million subscribers in Japan </li></ul><ul><li>Uses c-HTML instead of WAP Wireless Markup Language </li></ul><ul><li>US interest (teaming) by AOL, Yahoo, Bell South and SBC </li></ul>
  17. 19. I-Mode Deployment
  18. 20. I-mode video phone includes camera [Oct. 2001] up to 384 kb/s
  19. 21. I-mode video coverage area
  20. 22. Sprint Video Phone Manufactured by SANYO
  21. 23. Sprint Video Phone <ul><li>Backlit, Clock, Text Message Indicator, Voice Mail Button, Voice Mail Indicator, Volume Select/Display, Signal Strength Indicator Display Size: 5 lines </li></ul><ul><li>The first mobile phone with a color LCD to arrive in the United States, dual-band (AMPS, 1.9 GHz phone) </li></ul>
  22. 24. SPRINT VIDEO PHONE <ul><li>CDMA - 1XRTT is a 2.5G upgrade that offers twice the capacity and 144 kbps data rates in the 1.25 MHz bandwidth </li></ul><ul><li>1xRTT employs packet data transmission speeds of up to 144Kbps.    </li></ul>
  23. 25. Wireless Internet <ul><li>Wireline: </li></ul><ul><ul><li>Congestion limited </li></ul></ul><ul><ul><li>delay due to store and forward at routers </li></ul></ul><ul><ul><li>lost packets due to discard at routers </li></ul></ul><ul><ul><li>packet delays 100 ms. or less </li></ul></ul><ul><ul><li>TCP based upon above characteristics </li></ul></ul><ul><li>Wireless </li></ul><ul><ul><li>Performance limted by transmission delay and packet error need for retransmit </li></ul></ul><ul><ul><li>packet delays from 100 miliseconds to 1/2 second </li></ul></ul>
  24. 26. Wireless VOIP
  25. 27. WiFi, 802.11
  26. 28. WiFi, 802.11b
  27. 29. WiFi, Hot Spots
  28. 31. Voice over IP PBX Source: Spectralink, In 902-928, 2.4 GHz includes voice priority for voice packets when shared with data
  29. 32. Wireless VOIP Source: Spectralink, VOIP telephone
  30. 33. Voice Priority for VOIP LANs
  31. 34. Voice over 802.11
  32. 35. Phone for Wireless LAN e.g. hospitals
  33. 36. TCP with GEO satellite <ul><li>Example:. Accessing a data base record may takes 20 TCP roundtrips. </li></ul><ul><li>Over fiber across US this process takes between .75 and 1.5 seconds. Over GEO it will take 10 seconds because of cycles of TCP moving up window size slowly due to roundtrip delay of 1/2 second. </li></ul>GEO SAT Roundtrip delay of 1/2 second
  34. 37. Mobile Internet Economic Considerations (1) <ul><li>(US)Yahoo is including with its free news alerts to mobile Internet messaging advertisements </li></ul><ul><li>(Japan)NTT’s DoCoMo I-mode service which has 10 million users pays by the minute </li></ul>
  35. 38. Mobile Internet Economic Considerations (2) <ul><li>Telephone Model - users pay by the minute, by the size of the data transmitted and the type of service ( e.g. priority, non-priority) </li></ul><ul><li>Internet Model - everything is given away free in hopes that by advertising revenue, or e-commerce organizations doing sales on the internet turn traffic into money </li></ul>
  36. 39. Societal trends <ul><li>Society is becoming more computer literate and more reliant on data and information </li></ul><ul><li>Personal and business lifestyles are placing increased demands for travel and mobility </li></ul>
  37. 40. Technology enablers <ul><li>Mobile systems are able to support higher speeds and are becoming more cost effective </li></ul><ul><li>Software radio techniques making interoperability easier (Dual band functionality) </li></ul><ul><li>Adaptive antennas improving spectrum efficiency and higher data rates (e.g. steer a beam onto a single mobile) </li></ul>
  38. 41. Market Trends <ul><li>Mobile services are growing rapidly </li></ul><ul><li>Need for data, voice anytime, anywhere and in any form </li></ul><ul><li>Portable and palmtop computers are becoming prevalent </li></ul>
  39. 42. User/Operator needs <ul><li>User friendly access devices. Readable screen, easy data entry </li></ul><ul><li>Cost effective solutions that leverage current investments </li></ul><ul><li>Flexibility to meet needs of different markets </li></ul><ul><li>Standard systems to enable interoperability </li></ul><ul><li>Effective use of spectrum </li></ul>
  40. 43. Wireless Projections for This Millenium (2002) <ul><li>Increased Deployment of Wireless LANs, PBXs, hotspots, in home wireless networks </li></ul><ul><li>Multiple access devices: handhelds, portables, PDAs, Laptops, wrist watch size. Single equipment for inside and outside </li></ul><ul><li>Increased use of mobile for internet access (WiFi and cell/PCS ) </li></ul><ul><li>Mobile devices function on multiple networks (i.e. be able to operate on both WiFi and cellular/PCS data networks) </li></ul><ul><li>Wireless security solved </li></ul>
  41. 44. Course Summary
  42. 45. INFLUENCING FACTORS Regulatory & Standards User Requirements Research & Development Cost to the User Wireless Telecommunication Technologies
  43. 46. Exam Topics