Microsoft PowerPoint - cdma_technology_roadmap

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Microsoft PowerPoint - cdma_technology_roadmap

  1. 1. 1 Seminar Teknologi GSM vs CDMA Setyo Budianto Manager O&M Network setyo@telkom.co.id www.setyobudianto.com PT. Telekomunikasi Indonesia
  2. 2. Content Wireless World Market CDMA Technology Overview CDMA Technology Evolution PT. Telekomunikasi Indonesia 2
  3. 3. 3 Wireless World Market PT. Telekomunikasi Indonesia
  4. 4. Wireless Subscriber in The World PT. Telekomunikasi Indonesia 4
  5. 5. Key Drivers For Wireles Market Expansion Global Roaming Multi-Mode More Capacity, High Speed Data Medium Speed Data Multi-Band CDMA2000 Capacity/Quality Multi- cdmaOne Network Roaming WCDMA IS-95 B cdmaOne GPRS Mobility TDMA/ IS-95A CDMA-GSM GSM AMPS 1G 2G 2.5G 3G Time PT. Telekomunikasi Indonesia 5
  6. 6. Worldwide 2G and 3G Subscriber Trends PT. Telekomunikasi Indonesia 6
  7. 7. Wireless Handset in India PT. Telekomunikasi Indonesia 7
  8. 8. 8 CDMA Technology Overview PT. Telekomunikasi Indonesia
  9. 9. Multiple Access Technology FDMA (Frequency Division Multiple Access) 1 user/narrowband channel 4.8 TCH/Mhz/Cell Capacity depends much on spectrum TDMA (Time Division Multiple Access) 8 Users/Narrowband Channel 10.0 TCH/Mhz/Cell Capacity depends much on spectrum CDMA (Code Division Multiple Access) N Users/Wideband Channel 8 kbps vocoder : mobile 56.1 TCH/Mhz/Cell fixed 86.2 TCH/MHz/Cell 13 kbps vocoder : mobile 29.6 TCH/Mhz/Cell Capacity depends much on noise level PT. Telekomunikasi Indonesia 9
  10. 10. CDMA - How does coding work? A room with several pairs of people with different language The air in the room is the carrier The language is the coding system Other languages are heard as noise New pairs can join to talk in the same room until it is too noisy If people whisper, more conversation can take place PT. Telekomunikasi Indonesia 10
  11. 11. Frequency Planning GSM CDMA 2 1 1 1 10 3 5 1 1 1 11 4 1 1 2 12 7 6 1 1 1 1 1 1 9 1 1 1 10 3 5 8 2 1 1 1 1 1 11 4 1 1 1 12 7 6 10 3 5 1 1 1 1 1 9 11 4 1 1 1 8 2 12 7 6 1 1 1 1 1 1 9 1 1 10 3 5 8 1 1 1 1 11 4 1 1 12 7 6 1 1 9 8 N=1 4 site, frequency repeat 12 frequency repeat CDMA nearly eliminates cost of frequency planning PT. Telekomunikasi Indonesia 11
  12. 12. Soft Handoff The mobile unit is monitored by two or more cell sites Comparing the best quality frames on frame-by-frame basis Take advantage of the moment-by-moment changes Minimizing drop call and noise during handoffs PT. Telekomunikasi Indonesia 12
  13. 13. CDMA Power Control Ensures equal receive power from all subscribers avoids "near-far" problem Forward and reverse link power control MS power measured at cell site and MS is commanded to change power in small steps (1.25 msec) PT. Telekomunikasi Indonesia 13
  14. 14. Path Diversity Fading is more likely to cause loss of information = lower speech quality GSM Receiver D/A Fading CDMA Effects of fading are mitigated through use of multiple receivers that sum radio signals from different cells and from reflected rays. Fading Rake Receiver Receiver Receiver D/A Audio Receiver PT. Telekomunikasi Indonesia 14
  15. 15. Frequency Diversity TDMA 30 kHz 12 dB Loss -80 dB 30 kHz -90 dB -110 dB -80 dB -120 dB -90 dB -110 dB -120 dB Outgoing Waveform Received Waveform 12 dB Fade The entire 30 kHz Channel of TDMA is affected by this same fade. Therefore, total fade to end user is 12 dB CDMA 1.25 MHz 2 dB Loss -80 dB -90 db 1.25 MHz -110 db -120 db -80 dB -90 dB -110 dB -120 dB Outgoing Waveform 12 dB Fade Received Waveform This 400 kHz fade of 12 dB only affects 1/3 of CDMA bandwidth. Therefore, total fade to CDMA user is 2 dB PT. Telekomunikasi Indonesia 15
  16. 16. CDMA 2000 Network Architecture Circuit Switched Network WIN HLR VMS SMS BSC1 MS BTS1 MSC IWF PSTN ATM PC BTS2 MS PDSN/FA BSC2 HA R R Internet RAN AAA Server Application Server Packet Switched Network PT. Telekomunikasi Indonesia 16
  17. 17. 17 CDMA Technology Evolution PT. Telekomunikasi Indonesia
  18. 18. Wireless Services Trend PT. Telekomunikasi Indonesia 18
  19. 19. The 3G Choice is CDMA IMT-2000 Standard • 2 Mbps in fixed or in-building environments • 384 kbps in pedestrian or urban environments • 144 kbps in wide area mobile environments • Variable data rates in large geographic area systems (satellite) PT. Telekomunikasi Indonesia 19
  20. 20. 3G CDMA Evolution 3G CDMA Designed for 1.25 MHz CDMA2000 1xEV-DO In-Band Migration and Optimized for Data New Spectrum IS-856, Rel. 0 Enhancements Rel. A Dedicated & Optimized QoS, Fwd & Rev. Capacity Gains For Packet Data Broadcast, Forward Link: Peak Rate 3.1 mbps 2.4 Mbps Peak Rates Personal All IP Architecture Media, IMM ,2x Reverse Link: Peak Rate 1.8 mbps 2G CDMA 2.5G CDMA Additional voice capacity doubling - Terminal antenna diversity 1.25 MHz cdmaOne CDMA2000 1X 1xEV-DV In - Band Migration and Voice & Data IS-2000 Rel. 0 Rel. A Rel. B Rel. C IS - 95A IS-95B Rel. D 14.4 kbps data 64 kbps packet Double voice capacity 307 kbps Improvements Forward Link: Soft Handoff data − Fast Fwd Power Control packet data to data Peak Rate: Synchronous − Channel − Coherent Uplink services. 3.1 mbps Timing Concatenation 153.6 kbps packet data Simultaneous More flexible Reverse Link: − Turbo Codes voice and data data packet Peak Rate: scheduling. 1.8 mbps UMTS Designed for 5 MHz (WCDMA) HSDPA HSUPA Voice & Data New Spectrum 3GPP Rel. 99 Rel. 4 Rel. 5 Rel. 6 64/384 kbps cs/packet data Improvements Enhanced Soft handoff to data services Up-Link Asynchronous timing More flexible data packet scheduling 1995 1999 2000 2001 2002 2003 2004 2005 2006 PT. Telekomunikasi Indonesia 20
  21. 21. Mobile Service Evolution PT. Telekomunikasi Indonesia 21
  22. 22. CDMA2000 Deployment PT. Telekomunikasi Indonesia 22
  23. 23. CDMA Terminals PT. Telekomunikasi Indonesia 23
  24. 24. Thai Traditional Chinese Russian Thank You Gracias Spanish English Terima Kasih Merci French Obrigado Brazilian Portuguese Arabic Grazie Danke Italian German Simplified Chinese Japanese PT. Telekomunikasi Indonesia 24

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