A recent meeting of Study Group 12 saw progress in the development of QoS-related standards for IP-based networks and services.
QoS is seen as a key area to address in IP-based networks, especially as more carriers announce plans to carry voice traffic using the protocol.
Progress was made on the revision of Recommendation G.1020 which gives performance parameter definitions for quality of speech and other voiceband applications utilising IP networks. The updates will specify voice quality measurements associated with the use of the VoIP management protocol, RTP Control Protocol Extended Reports (RTCP XR). RTCP XR defines a set of metrics that contain information for assessing VoIP call quality and diagnosing problems.
And Y.1541 which gives network performance objectives for IP-based services, is also actively under revision to include new QoS classes with more stringent packet loss performance, needed for example for commercial video applications and certain TCP formats.
Also during its meeting - the first of the new study period - SG12 consented a revision of Recommendation G.107 (the E-model, see previous e-Flash story, to include an improved treatment of bursty packet loss.