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  • 1. IPv6 Videophone with Windows Driver Model By Gopinath Rao Sinniah Asian Institute of Medicine, Science and Technology (AIMST)
  • 2.
    • Current Conferencing Tools
    • WDM
      • Video capture
      • Audio capture
    • QoS and Flow Label
    • IPv6 Address binding
    • Use of Flow Label in IPv6
    • Types of Communication
    • Videophone using winsock2
    • Videophone using multicast
    • The flow of packets using WDM and IPv6
    • Videophone to mobile phone (3G/4G)
  • 3. Current Tools
    • Vic & Rat
    • HVIP6 (High-quality Video conferencing platform based on IPv6 multicast)
    • Gnome Meeting
  • 4. Windows for Driver Model (WDM)
    • Advantages of WDM Video Capture
      • 32 bit address
      • Synergy between DirectShow and CSA
      • Single class driver architecture
      • Television tuner, input selection and support for fields
      • One driver for all Windows OS
  • 5. Windows Driver Model (WDM)
    • Video Capture
  • 6.
    • Audio Capture in WDM
      • Audio processing is performed in kernel mode
      • Kernel streaming is built on top of WDM
  • 7. What is QoS
    • A video phone application requires:
    • The cost is not prohibitive
    • There is a network path available to the other party
    • The user knows the IP address of the terminal the other user
    • The end terminals can reassemble the data packets into a sensible order
    • The end terminals understand how to handle errors in packets
    • The packets arrived at the minimum length of time
  • 8. Use of Flow Label in IPv6 header
    • Advantages of using flow label
      • Decreases the average processing load of the network routers
      • Facilitates end-to-end IP level security mechanism
      • Reserving resources using flow label reduce problem caused by frequent route changes
      • Facilitate implementation of QoS based routing
  • 9.
    • The use of 20-bit flow label for QoS
      • Will ensure smooth transition on video and audio packets without degradation
      • Will ensure adequate latency level
      • Requires special handling by routers (a separate project)
      • Still in the implementation level
  • 10. IPv6 Address binding
    • Most of the nodes will have more than 1 IPv6 address
      • Link Local Address
      • Global Unicast Address
    • Choice of source address based on destination address
    • Will integrate the use of “default address selection for IPv6” – RFC 3484 in future
  • 11. Types of Communication
      • Initially the system developed using point to point (unicast)
      • Multicast transmission is still under development
        • Multicast in a LAN is not a problem
        • Multicast in WAN - need to use appropriate multicast routing
  • 12. How does IPv6 Videophone works?
    • Videophone uses both TCPv6 and UDPv6
      • TCPv6 for exchanging information between 2 machines
      • UDPv6 for transmitting video and audio packets
  • 13. IPv6 Videophone using winsock2
    • Uses winsock2 architecture (RFC 2533)
    • WSASocket() is used as the predefined socket objects
    • Create socket
    • Optimization on WSASocket for receiving continuous audio/video packet
    m_hSocket=WSASocket (AF_INET6, SOCK_DGRAM, IPPROTO_UDP, NULL, 0,0); if (WSAAsyncSelect(m_hSocket, mesg_ptr->m_hWnd, WM_SOCKET_EVENT, IEvent) == SOCKET_ERROR)
  • 14. IPv6 Videophone using multicast
    • Send multicast packet by setting IPv6 multicast address in sendto () function
    • To receive multicast packet, the following is used after the creation of WSASocket
    • This sends ICMPv6 multicast Listener Discovery (MLD) to the multicast group
    sendto(m_sndSocket, buffer, sendsize, 0, (LPSOCKADDR) &m_sendtoadd, add_size) Multicast address : ff01:0:0:0:0:0:0:2 struct ipv6_mreq imr6; Imr6.ipv6mr_interface=0; Setsockopt(m_hSocket, IPPROTO_IPV6, IPV6_JOIN_GROUP, (char *) &imr6, sizeof(imr6));
  • 15. Flow of Packet Capture of Video / Audio using WDM Compressed Video / Audio using WDM IPv6 Socket creation IPv6 Address Selection Link Local Address / Unicast Address Multicast address Marking of packets using IPv6 flow label (QoS) 3G / 4G Transition server IPv6 Network 3G / 4G network
  • 16. The communication
    • Node A request connection from node B (TCPv6)
    • Node A sends compressed data to node B (UDPv6)
    • Node B decompress and playback
    Web cam Web cam Accept/Deny Hub Connect IPv6 Node A IPv6 Node B
  • 17. Capture Audio/Video using WDM Compressed Audio/Video using WDM Sender Receiver Send Flow label and traffic class will check the traffic and ensure it is sending to the proper address. Decompressed Audio/Video using WDM Playback Audio/Video using WDM Node A Node B
  • 18. Future Extension – pc to mobile phone (3G/4G) in IPv6 mode Translation server IPv6 Videophone
  • 19. Conclusion
    • The system is not much different from other Video Conferencing tools
    • The use of IPv6 features are primary objective
      • Flow label
      • Mobile communication
    • System is being developed to support:
      • QoS using flow label and traffic class
      • Session Initiation Protocol (SIP)
      • Mobile & wireless communication
  • 20. Thank You Gopinath Rao Sinniah [email_address]