114.2.7 Streaming KPIs
Streaming-specific KPIs are as follows:
114.2.7.1. Service Non-Accessibility (%)
Denotes the probability that the first RTP or HTTP data packet of the stream cannot be received by the phone when requested by the user. The reception of a packet is completed by the appearance of a "buffering" message in the user's streaming client.
114.2.7.2. Service Access Time (s)
Denotes the duration of a service access from requesting the stream at the portal until the reception of the first stream data packet by the phone.
114.2.7.3. Reproduction Start Failure Ratio (%)
Denotes the probability of unsuccessful stream reproduction.
114.2.7.4. Reproduction Start Delay (s)
Denotes the time elapsing from reception of the first stream data packet by the phone until the phone starts reproducing the stream.
114.2.7.5. Reproduction Cut-off Ratio (%)
Denotes the probability that a successfully started stream reproduction is ended by a cause other than intentional termination by the user.
Possible causes for stream reproduction cut-off include:
Radio bearer loss
Synchronization errors
Streaming server/system failure/errors
Protocol errors
Streaming player failure/errors
114.2.7.6. Streaming Session Cut-off Ratio (%)
(not in ETSI)
Denotes the probability that a streaming session is ended by a cause other than intentional termination by the user, either before or after start of reproduction.
114.2.7.7. Streaming Quality (MOS-VSQI)
Denotes the quality of the stream reproduction as assessed by the VSQI algorithm. VSQI takes both audio and video into account.