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行動網際網路電話之研製與實現

行動網際網路電話之研製與實現. Outline. 緒論 相關技術背景之探討 軟體實現行動網際網路電話系統 相關演算法探討 未來展望. 緒論. 寬頻網路 多媒體資料 封包交換 vs 電路交換. 相關技術背景之探討. SIP. RFC 2543, March 1999 RFC 3261, June 2002 Function Find Out IP Address(Location) of use Session Initiation Session Management. SIP Architecture. SIP Messages.

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行動網際網路電話之研製與實現

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  1. 行動網際網路電話之研製與實現

  2. Outline • 緒論 • 相關技術背景之探討 • 軟體實現行動網際網路電話系統 • 相關演算法探討 • 未來展望

  3. 緒論 • 寬頻網路 • 多媒體資料 • 封包交換 vs電路交換

  4. 相關技術背景之探討

  5. SIP • RFC 2543, March 1999 • RFC 3261, June 2002 • Function • Find Out IP Address(Location) of use • Session Initiation • Session Management

  6. SIP Architecture

  7. SIP Messages “The SIP INFO Method”, RFC 2976, October 2000. “The Session Initiation Protocol (SIP) UPDATE Method”, RFC 3311, September 2002.

  8. SIP Response Messages

  9. SIP Operation

  10. RTP • RFC 1889, January 1996 • RFC 3550, July 2003 • Function • 傳送即時性的資料

  11. RTP Packet Format

  12. RTP Packet Format - A/V Profile

  13. RTP Packet Format - Timestamp

  14. RTP Packet Format - CSRC

  15. RTP Packet Format - Extension

  16. RTP Packet Format -Payload Data & Padding Counter

  17. RTCP Packet Types

  18. RTCP Packet Format - SR

  19. RTCP Packet Format –SR & Interarrival jitter D(i,j) = (Rj – Sj) – (Ri – Si) Ji = Ji-1 + ( | D(i-1,i)| – Ji-1)/16

  20. RTCP Packet Format - RR

  21. RTCP Packet Format - SDES

  22. RTCP Packet Format – SDES ITEM Format & Type

  23. RTCP Packet Format – BYE

  24. RTCP Packet Format – APP

  25. 軟體實現行動網際網路電話系統

  26. Proxy Sever System

  27. UA System

  28. UA System - UUS

  29. UA System - RRS

  30. UA System - EDS

  31. UA System - WSS

  32. 相關演算法探討 (a) PCM (b) ADPCM

  33. 相關演算法探討

  34. 相關演算法探討

  35. 未來展望 • 更多種類的多媒體資料傳送 • 異質網路的整合 • 穿越防火牆(Firewall)與網路位址轉換(NAT)能力的SIP

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