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1. 发明公开

EP4184886A1 METHOD, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR INITIATING DOWNSPEEDING IN A VIDEOCONFERENCING SESSION 有权
公开(公告)号：EP4184886A1
公开(公告)日：2023-05-24
申请号：EP22207372.8
申请日：2022-11-15
申请人： Pexip AS
发明人： GRAFF, Håvard , BELOQUI, Tulio , HVIDSTEN, Knut Inge
IPC分类号： H04L47/19 , H04L47/263 , H04L47/27 , H04L47/35 , H04L47/36
摘要： System and method of downspeeding a media stream transmitted over a communication link from a sender device to a receiving device. The method comprising mapping for each packet in the media stream a packet identifier, a transmission timestamp and a packet size; transmitting for each packet received at the receiving device a feedback message to the sender device, the feedback message comprising the packet identifier and an arrival timestamp; determining a transmission rate for a first sliding window of N transmitted packets by dividing a packet size sum of the N transmitted packets with a time difference between a transmission time stamp of the last of the N transmitted packets and a transmission time stamp of the first of the N transmitted packets; determining a received rate for the first sliding winding of the N transmitted packets by dividing the packet size sum of the N transmitted packets with a time difference between the arrival time stamp of the last of the N transmitted packets and the arrival time stamp of the first of the N transmitted packets; and initiating downspeeding of the media stream when for the first sliding window of the N transmitted packets the difference between the transmission rate and the received rate divided by the transmission rate is above a first downspeeding threshold.

2. 发明公开

EP4184885A1 METHOD, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR DETERMINING CONGESTION OF A COMMUNICATION LINK TRANSMITTING A MEDIA STREAM OVER THE COMMUNICATION LINK 有权
公开(公告)号：EP4184885A1
公开(公告)日：2023-05-24
申请号：EP22207369.4
申请日：2022-11-15
申请人： Pexip AS
发明人： GRAFF, Håvard , BELOQUI, Tulio , HVIDSTEN, Knut Inge
IPC分类号： H04L47/19 , H04L47/263 , H04L47/27 , H04L47/35 , H04L47/36 , H04L47/11 , H04L47/127 , H04L47/193 , H04L47/283
摘要： System and method for determining congestion of a communication link transmitting a media stream over the communication link from a sender device to a receiving device. The method comprising transmitting media packets into the media stream, each media packet having a packet identifier; transmitting recovery packets into the media stream, each recovery packet having a packet identifier and is adapted to replace a missing packet of the media stream; mapping for each packet in the media stream the packet identifier, a transmission timestamp and a packet size; - mapping for each recovery packet the packet identifier of the recovery packet and the packet identifier of the packet the recovery packet is adapted to replace; transmitting for each packet received at the receiving device a feedback message to the sender device, the feedback message comprising the packet identifier and an arrival timestamp; determining a packet as missing when none of the feedback messages comprises the packet identifier of the packet; determining a packet as recovered when a feedback message comprises the packet identifier of a recovery packet corresponding to the missing packet; and determining a packet recovery success rate by dividing a total number of packets determined as recovered within a first sliding window with a total number of packets determined as missing within the first sliding window; and determining that the communication link is congested when for the first sliding window of the N transmitted packets the packet recovery success rate is below a congestion threshold.

3. 发明公开

EP4187818A1 METHOD, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR UPSPEEDING IN A VIDEOCONFERENCING SESSION 有权
公开(公告)号：EP4187818A1
公开(公告)日：2023-05-31
申请号：EP22207571.5
申请日：2022-11-15
申请人： Pexip AS
发明人： GRAFF, Håvard , BELOQUI, Tulio
IPC分类号： H04L1/00 , H04L47/12
摘要： System, method and computer program of upspeeding a media stream transmitted over a communication link from a sender device to a receiving device. The method comprising mapping for each packet in the media stream a packet identifier, a transmission timestamp and a packet size; mapping for each recovery packet in the media stream the packet identifier of the recovery packet and the packet identifier of the packet the recovery packet is adapted to replace; determining a delta rate by dividing the difference between the real transmission rate and the real received rate with the real transmission rate; determining a packet recovery success rate by dividing a total number of packets determined as recovered with a total number of packets determined as missing, transmitting a third transmission bitrate of recovery packets in the media stream in addition to the second transmission bitrate of recovery packets; stopping transmitting the third transmission bitrate of recovery packets if the delta rate exceeds the first upspeeding threshold and the packet recovery success rate is below a second upspeeding threshold, else increasing the first transmission bitrate of media packets in the media stream with the third transmission bitrate.

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