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Voice over IP

Contents. Introduction to VoIPThe Internet Call Processing ModelThe Internet Call Processing ProtocolsPossible directionsScenario. Introduction to VoIP. Establishing VoIP connections with H.323 or SIPSignaling Control Information with MGCP or MegacoRTP (over UDP) is used for packet structure

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Voice over IP

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    2. Contents Introduction to VoIP The Internet Call Processing Model The Internet Call Processing Protocols Possible directions Scenario

    3. Introduction to VoIP Establishing VoIP connections with H.323 or SIP Signaling Control Information with MGCP or Megaco RTP (over UDP) is used for packet structure

    4. The Internet Call Processing Model

    5. The Internet Call Processing Model (2)

    6. The Internet Call Processing Protocols H.323 The Media Gateway Control Protocol (MGCP) Megaco/H.248 The Session Initiation Protocol (SIP)

    7. MGCP

    8. MGCP (2)

    9. Megaco

    10. H.323 Discovery Registration Connection Setup Capability Exchange Logical Channel Exchange Payload Transfer Termination

    11. SIP User Agent User Agent Client User Agent Server Servers Proxy Redirect Registrar Location Servers Database with routing information SIP supports mobile users!

    12. SIP (2)

    13. Overview

    14. Interesting things SpeakUp – Florian Overkamp Bachelor Thesis Jesse Kaijen – DACS (Meent and Pras)

    15. Possible directions Compression techniques Quality improvement VoIP over UMTS VoIP over AdHoc Network Access to emergency number 112 Focusing on one component (GateKeeper) and improving it VoIP conferencing (multicast) Improving standards (SIP, H.323) Testing a program, like Skype Optimization of two standards Literature study to give a broad overview of VoIP

    16. Scenario Voice over IP over Bluetooth VoIP over WLAN -> many papers VOIP over BT -> only Alcatel Bluephone Commercial in 2005

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