none
[MS-RDPEUSB] Field NoAckIsochWriteJitterBufferSizeInMs? RRS feed

  • Question

  • Dear All,

    In [MS-RDPEUSB] session 2.2.11 USB_DEVICE_CAPABILITIES, the field NoAckIsochWriteJitterBufferSizeInMs
    field is nonzero means I will receive a NoAck isochronous transfer(2.2.9.8 TS_URB_ISOCH_TRANSFER),
    so I set the value to 0x100, and I can also normally receive the isoch transfer packet(with NoAck bit),
    but, after a few seconds, the server is no longer send the isochronous transfer packet.

    How do I properly use this feature?

    Thanks in Advance.

    Regards,

    Alfred
     
    Wednesday, July 13, 2011 11:21 AM

Answers

  • Hi Edgar,

    I think I have found the root cause of this issue, that just I did not respond the
    correct bus time to the server in internal ioctl "IOCTL_TSUSBGD_IOCTL_USBDI_QUERY_BUS_TIME".
    So, after I reply the correct bus time to server, I can normally receive the
    isochronous transfer out packets from the server.

    Thank you all the same


    Regards,

    Alfred
    Monday, July 18, 2011 5:28 AM
  • Hi Alfred,

     

    Thanks for letting me know the good news. I have marked this issue as resolved.

     

    Regards,

    Edgar

    Monday, July 18, 2011 7:46 PM
    Moderator

All replies

  • Hi Alfred,

    Thank you for your question.  A colleague will follow up with you soon to investigate this issue.

    Regards,
    Mark Miller
    Escalation Engineer
    US-CSS DSC PROTOCOL TEAM

     

    Wednesday, July 13, 2011 12:20 PM
  • Alfred,

    I will follow up on this once I complete my investigation.

    Thanks,

    Edgar

    Friday, July 15, 2011 4:50 PM
    Moderator
  • Hi Edgar,

    I think I have found the root cause of this issue, that just I did not respond the
    correct bus time to the server in internal ioctl "IOCTL_TSUSBGD_IOCTL_USBDI_QUERY_BUS_TIME".
    So, after I reply the correct bus time to server, I can normally receive the
    isochronous transfer out packets from the server.

    Thank you all the same


    Regards,

    Alfred
    Monday, July 18, 2011 5:28 AM
  • Hi Alfred,

     

    Thanks for letting me know the good news. I have marked this issue as resolved.

     

    Regards,

    Edgar

    Monday, July 18, 2011 7:46 PM
    Moderator