APPENDIX 2- MEASUREMENT METHODS
Table 3: Measurement Methods of both Cellular Mobile (voice, 3G DataandSMSservices), and Fixed
(voice service) Networks.
Parameter Name
Measurement Method
MOBILE NETWORKS
Voice Service
Call Setup Success
Rate (CSSR)
Definition: The CSSR denotes the probability that the end-user can access the mobile
telephony service when requested if it is offered by display of the network indicator on the
user equipment.
Equation:
Where:
Refer to ETSI TS 102 250-2 V2.2.1 (2011-04), Page 102-107
Note 1: Due to network problems and despite MTC being not busy (see preconditions for
measurement), it may even be possible for the MOC to receive a busy or not reachable
signal. In this case, since no ALERTING message will be sent, the test sample will be
treated as a failure.
Call Setup
(CST)
Time
Definition: The call setup time describes the time period between sending of complete
address information by the MOC and receipt of call set-up notification or an alerting
message.
Equation:
Refer to ETSI TS 102 250-2 V2.2.1 (2011-04), Page 108.
Note 2: This parameter is not calculated unless the telephony call setup attempt is
successful. It is assumed
that early traffic channel assignment is used.
Call
Drop
(CDR)
Rate
Definition: The call drop rate denotes the probability that a successful established attempt is
ended unintentionally by MOC or MTC party.
Regulations for Quality of Service of Cellular Mobile and Fixed Networks Services (Voice ,SMS and 3G Data Services )
11