Electronic and Postal Communications (Quality of Service)
G.N. No. 416 (contd)
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SECOND SCHEDULE
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(Made under Regulation 9)
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QUALITY OF SERVICE PARAMETERS FOR MOBILE TELEPHONE SERVICES
S/NO
Definition
1
Percentage of test route over
which a minimum signal strength
of -100 dBm is achieved
2
Network availability gives an
indication about the downtime of
the MSC/BS but excludes all
planned service downtime for any
maintenance or software upgrade
work.
3
Percentage of unsuccessful calls.
An unsuccessful call is call
attempt to a valid number, while
in a coverage area, where neither
the call is answered nor the called
party busy tone nor ringing tone
is recognized at the access of the
calling user within 40 seconds
from the instant when the last
digit of the destination subscriber
number is received by the
network.
4
The call set up time can be
defined as the time interval from
the instant the user initiates a
connection request until the
complete message indicating call
disposition is received by the
calling terminal.
Measurement
Service Coverage
Road/In door signal strength test
(Measurement to be made as per
ETSI EG 202 057-3)
Network Availability
(Measurement to be made as per
ETSI EG 202 057-3)
Blocked Call Rate
Percentage of unsuccessful calls.
Probability of end-to-end
blocking (ITU-T Rec. E.771)
Target Values
In door: ≥ -85%
:
Out door: ≥ -95%
Above 99%
SDCCH congestion: <
0.5%
TCH Congestion: <
2%
The average target
value for the
probability of blocking
on radio links: 10-2
(Measurements to be made as per
ETSI EG 202 057-3)
Call Set-up Time
Post Selection Delay: Mean value
(in seconds) (ITU-T Rec. E.771)
(Measurement to be made as per
ETSI EG 202 057-3)
13
The average target
value for the
probability of blocking
on PLMN-to-fixed
network: 5*10-3
The mean value of the
Post Selection Delay
at normal load:
Mobile to Mobile: 8.5
sec ;
Mobile to Fixed:
5.5sec