Method for Monitoring Quality of Service in Multimedia Communications
The present disclosure describes a method for monitoring the quality of service of H.264 multimedia communications. The present disclosure achieves the in-band QoS monitoring of the H.264 multimedia communications, thereby reducing extra overhead introduced by the QoS monitoring. The present disclosure makes direct use of the extension message mechanism of the high level media protocol H.264 per se to bear QoS report information without use of any extra channel, so as to achieve an “in-band” QoS report mechanism. The H.264 message extended mechanism, e.g., an SEI message, is used to self-define user data for transmission of the QoS report to monitor a transmission quality of the H.264 multimedia communications, without influence upon communications of any existing device in the H.264 protocol while reducing extra bandwidth overhead. Various protection measures are also provided based upon the use of the H.264 in-band report to improve the reliability of the RTCP/UDP.
1 . A method for monitoring quality of service in multimedia communications, comprising:
obtaining data related to quality of service of the multimedia communications;
generating a report on quality of service of the multimedia communications;
bearing the report on quality of service in an extension message of a data frame in a multimedia compression codec standard;
sending the extension message to communication terminals.
2 . The method for monitoring the quality of service of multimedia communications according to claim 1 , wherein the multimedia compression codec standard is H.264 standard.
3 . The method for monitoring the quality of service of multimedia communications according to claim 2 , wherein:
the extension message comprises supplement enhancement information, and
the supplement enhancement information is borne in a network abstract layer unit of the data frame in the standard, and the supplement enhancement information comprises information of the report on quality of service.
4 . The method for monitoring the quality of service of multimedia communications according to claim 3 , wherein the supplement enhancement information comprises:
a payload type field configured to indicate that payload is a corresponding report on quality of service;
a payload length field configured to indicate the length of the report on the corresponding quality of service; and
the payload configured to be filled with the report on quality of service.
5 . The method for monitoring the quality of service of multimedia communications according to claim 3 , wherein the supplement enhancement information bearing the quality of the service report is further borne by the network abstract layer unit; and
a network abstract layer reference identifier of the network abstract layer unit is set in accordance with a reliability requirement on transmission of the report on quality of service and takes corresponding protection measures in accordance with the identifier.
6 . The method for monitoring the quality of service of multimedia communications according to claim 1 , wherein:
the extension message comprises supplement enhancement information; and
the supplement enhancement information is borne in a network abstract layer unit of the data frame in the standard, and the supplement enhancement information comprises information of the report on quality of service.
7 . The method for monitoring the quality of service of multimedia communications according to claim 6 , wherein the supplement enhancement information of the report on quality of service comprises:
a payload type field configured to indicate that payload is a corresponding report on quality of service;
a payload length field configured to indicate the length of the corresponding report on quality of service; and
the payload configured to be filled with the corresponding report on quality of service.
8 . The method for monitoring the quality of service of multimedia communications according to claim 7 , wherein the report on quality of service comprises a sender report or a receiver report which are distinguished by the payload type field.
9 . The method for monitoring the quality of service of multimedia communications according to claim 6 , wherein the supplement enhancement information bearing the report on quality of service is further borne by the network abstract layer unit; and
a network abstract layer reference identifier of the network abstract layer unit is set in accordance with a reliability requirement on transmission of the report on quality of service and takes corresponding protection measures in accordance with the identifier.
10 . The method for monitoring the quality of service of multimedia communications according to claim 6 , wherein when the report on quality of service of at least one media stream is borne in the supplement enhance message, the report on quality of service comprises a reception report block corresponding to the borne at least one media stream.
11 . The method for monitoring the quality of service of multimedia communications according to claim 1 , wherein the extension message of H.264 or the real-time transport control protocol is selectively used to bear the report on quality of service.
12 . The method for monitoring quality of service in multimedia communications according to claim 1 , further comprising:
extracting the report on quality of service from the received extension message of the data frame in the standard; and
carrying out the quality of service policy in accordance with the report on quality of service by each of the communication terminals.
13 . A system for monitoring quality of service in multimedia communications, the system comprising:
means for obtaining data related to quality of service of the multimedia communications;
means for generating a report on quality of service of the multimedia communications;
means for bearing the report on quality of service in an extension message of a data frame in a multimedia compression codec standard; and
means for sending the extension message to communication terminals.
14 . The system for monitoring quality of service in multimedia communications according to claim 13 , further comprising:
means for extracting the report on quality of service from the received extension message of the data frame in the standard; and
mean for carrying out the quality of service policy in accordance with the report on quality of service by each of the communication terminals.