IPv6 Videophone with Windows Driver Model

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IPv6 Videophone with Windows Driver Model

• By
• Gopinath Rao Sinniah
• Asian Institute of Medicine, Science and
  Technology (AIMST)

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• 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)

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Current Tools

• Vic Rat
• HVIP6 (High-quality Video conferencing platform
  based on IPv6 multicast)
• Gnome Meeting

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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

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Windows Driver Model (WDM)

• Video Capture

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• Audio Capture in WDM
• Audio processing is performed in kernel mode
• Kernel streaming is built on top of WDM

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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

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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

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• 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

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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

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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

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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

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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_hSocketWSASocket (AF_INET6, SOCK_DGRAM,
IPPROTO_UDP, NULL, 0,0)
if (WSAAsyncSelect(m_hSocket, mesg_ptr-gtm_hWnd,
WM_SOCKET_EVENT, IEvent) SOCKET_ERROR)
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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 ff010000002
struct ipv6_mreq imr6 Imr6.ipv6mr_interface0 Se
tsockopt(m_hSocket, IPPROTO_IPV6,
IPV6_JOIN_GROUP, (char ) imr6, sizeof(imr6))
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Flow of Packet
Capture of Video / Audio using WDM
Compressed Video / Audio using WDM
IPv6 Socket creation
IPv6 Network
Marking of packets using IPv6 flow label (QoS)
IPv6 Address Selection
Link Local Address / Unicast Address
Multicast address
3G / 4G network
3G / 4G Transition server
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The communication

• Node A request connection from node B (TCPv6)
• Node A sends compressed data to node B (UDPv6)
• Node B decompress and playback

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Future Extension pc to mobile phone (3G/4G) in
IPv6 mode
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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

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Thank You

• Gopinath Rao Sinniah
• gopi_at_aimst.edu.my