7 List of system parameters

24.1933GPP5G SystemAccess Traffic Steering, Switching and Splitting (ATSSS)Release 17Stage 3TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

7.1 General

The description of timers in the tables of clause 7 should be considered a brief summary. The precise details are found in clause 5, which should be considered the definitive descriptions.

7.2 Timers of performance measurement function (PMF) protocol (PMFP)

Timers of PMFP are shown in table 7.2-1 and table 7.2-2.

Table 7.2-1: Timers of PMFP – UE side

TIMER NUM.	TIMER VALUE	CAUSE OF START	NORMAL STOP	ON THE 1^st, 2^nd, 3^rd, 4^th EXPIRY (NOTE 1)
T101	1s	Transmission of the first PMFP ECHO REQUEST message	A PMFP ECHO RESPONSE message received for each sent PMFP ECHO REQUEST message	Abort of the procedure.
T102	NOTE 2	Transmission of PMFP ACCESS REPORT message	PMFP ACKNOWLEDGEMENT message with the same EPTI is received	Retransmission of PMFP ACCESS REPORT message
T103	1s	Transmission of PMFP PLR COUNT REQUEST message	PMFP PLR COUNT RESPONSE message with the same EPTI is received	Abort of the procedure.
T104	1s	Transmission of PMFP PLR REPORT REQUEST message	PMFP PLR REPORT RESPONSE message with the same EPTI is received	Abort of the procedure.
T105	1s	Transmission of PMFP UAT COMMAND message	PMFP UAT COMPLETE message with the same EPTI is received	Retransmission of PMFP UAT COMMAND message
T106	1s	Transmission of PMFP UAD PROVISIONING message	PMFP UAD PROVISIONING COMPLETE message with the same EPTI is received	Retransmission of PMFP UAD PROVISIONING message
NOTE 1: Typically, the procedures are aborted on the fifth expiry of the relevant timer. Exceptions are described in the corresponding procedure description. NOTE 2: Initial timer value is 500 milliseconds. The timer value doubles after each timer expiry, until set to 4 seconds.

Table 7.2-2: Timers of PMFP – UPF side

TIMER NUM.	TIMER VALUE	CAUSE OF START	NORMAL STOP	ON THE 1^st, 2^nd, 3^rd, 4^th EXPIRY (NOTE 1)
T201	NOTE 2	Transmission of the first PMFP ECHO REQUEST message	A PMFP ECHO RESPONSE message received for each sent PMFP ECHO REQUEST message	Abort of the procedure.
T203	1s	Transmission of PMFP PLR COUNT REQUEST message	PMFP PLR COUNT RESPONSE message with the same EPTI is received	Abort of the procedure.
T204	1s	Transmission of PMFP PLR REPORT REQUEST message	PMFP PLR REPORT RESPONSE message with the same EPTI is received	Abort of the procedure.
NOTE 1: Typically, the procedures are aborted on the fifth expiry of the relevant timer. Exceptions are described in the corresponding procedure description. NOTE 2: The value of this timer is network dependent.