Electronic and Postal Communications (Quality of Service)
G.N. No. 416 (contd)
bound specified for
Real-time, highly
interactive applications
sensitive to jitter is
100ms.
3
Ratio of packets lost to the total
packets transmitted between two
designated points.
Loss Ratio
(ITU-T Rec. Y.1541).
Loss ratio for each class of
service: <10-3
4
Unsuccessful data transmission ratio
The ratio of unsuccessful data % Unsuccessful data
<10-3
transmissions to the total number of transmission (measured
data transmission attempts in a as per ETSI EG 202
specified time period. A data 057-4)
transmission is successful if a test
file is transmitted completely and
with no errors.
5
Data transmission speed achieved
The data transmission rate that is
-Maximum data
Data transmission achieved
achieved separately for downloading transmission rate in
should be at least 80% of that
and uploading specified test files
kbit/s achieved;
advertised by the service
between a remote web site and a
-Minimum data
provider.
user’s computer.
transmission rate in
kbit/s achieved;
-mean value and
standard deviation of
the transmission rate in
kbit/s achieved;
(ETSI EG 202 057-4)
20