12 List of system variables
3GPP48.018Base Station System (BSS) - Serving GPRS Support Node (SGSN)BSS GPRS protocol (BSSGP)General Packet Radio Service (GPRS)Release 17TS
12.1 General Variables
Table 12.1.a: Procedure timers
|
Timer mnemonic |
Value range |
Notes |
Relation to other timers |
|
T1 |
1 s < T1 < 30 s |
Guards the (un)blocking procedures |
none |
|
T2 |
1 s < T2 < 120 s |
Guards the reset procedure |
none |
|
T3 |
0,1 s < T3 < 10 s |
Guards the suspend procedure |
none |
|
T4 |
0.1 s < T4 < 10 s |
Guards the resume procedure |
none |
|
T5 |
1 s < T5 < 30 s |
Guards the Radio Access Capability Update procedure |
none |
|
T6 |
0,1 s < T6 < 10 s |
Guards the DOWNLOAD-BSS-PFC PDU |
none |
|
T7 |
0,1 s < T7 < 10 s |
Guards the CREATE-BSS-PFC PDU |
none |
|
T8 |
0,1 s < T8 < 10 s |
Guards the MODIFY-BSS-PFC PDU |
none |
|
T9 |
Same as T3314 READY timer in 3GPP TS 24.008. Minimum 6 s |
This is the Packet Flow Timer (PFT) and holds the maximum time the BSS may store a BSS PFC while no uplink data is transmitted |
Cannot exceed the value of the READY timer for this MS unless READY timer is less than 6 s. |
|
T10 |
0,5 s T10 < 10 s |
Guards the PFC queuing procedure |
T10 < T7 |
|
T11 |
0,1 s < T11 < 10 s |
Guards the MBMS Session Start, MBMS Session Update and MBMS Session Stop procedures |
none |
|
T12 |
0,5 s T12 < 10 s |
Guards the PS Handover Required procedure in the BSS |
none |
|
T13 |
0,5 s T13< 10 s |
Guards the PS Handover Request procedure in the SGSN |
none |
|
T14 |
0,5 s T14 < 10 s |
Guards the PS Handover Complete procedure in the SGSN |
none |
|
T15 |
O&M |
Overload timer in BSS, see sub-clause 8.6.1 |
T15< T16 |
|
T16 |
O&M |
Overload timer in BSS, see sub-clause 8.6.1 |
none |
Table 12.1.b: Procedure retry counters
|
Retry mnemonic |
Retry value |
Notes |
|
BVC-BLOCK-RETRIES |
3 |
none |
|
BVC-UNBLOCK-RETRIES |
3 |
none |
|
BVC-RESET-RETRIES |
3 |
none |
|
SUSPEND-RETRIES |
3 |
none |
|
RESUME-RETRIES |
3 |
none |
|
RA-CAPABILITY-UPDATE-RETRIES |
3 |
none |
|
DOWNLOAD-BSS-PFC-RETRIES |
3 |
none |
|
CREATE-BSS-PFC-RETRIES |
3 |
none |
|
MODIFY-BSS-PFC-RETRIES |
3 |
none |
|
MBMS-SESSION-START-REQUEST-RETRIES |
3 |
none |
|
MBMS-SESSION-STOP-REQUEST-RETRIES |
3 |
none |
|
MBMS-SESSION-UPDATE-REQUEST-RETRIES |
3 |
none |
12.2 Flow control variables
Table 12.2: Flow control variables
|
Variable mnemonic |
Value range |
Notes |
Relation to other variables |
|
Th |
5 s < Th < 6 000 s |
Interval after Flow-Control-MS before SGSN may use SGSN generated Bmax and R |
none |
|
C |
1 s < C < 10 s |
Minimum interval between sending of subsequent Flow Control PDUs for a given BVC or MS or PFC |
C < Th |
|
Tf |
5 s < Tf < 6 000 s |
Interval after Flow-Control-PFC before SGSN may use SGSN generated Bmax and R |
Tf > C |
Annex A (informative):
Change history
|
Date |
TSG# |
TSG Doc. |
CR |
Rev |
Cat |
Subject/Comment |
New |
|
2015-12 |
– |
– |
– |
Generation of Rel-13 version based on v12.4.0 |
13.0.0 |
||
|
GP-68 |
GP-151194 |
0418 |
4 |
Introduction of Power Efficient Operation (Rel-13) |
13.0.0 |
||
|
GP-68 |
GP-151121 |
0419 |
1 |
Enhancements to CS/PS coordination |
13.0.0 |
||
|
2016-02 |
GP-69 |
GP-160082 |
0424 |
Removal of enhancements to CS/PS coordination in shared networks |
13.1.0 |
||
|
GP-69 |
GP-160166 |
0422 |
3 |
Miscellaneous corrections to eDRX |
13.1.0 |
||
|
GP-69 |
GP-160164 |
0421 |
5 |
Introduction of EC-EGPRS |
13.1.0 |
||
|
2016-06 |
GP-70 |
GP-160407 |
0425 |
1 |
F |
Miscellaneous corrections to eDRX_GSM |
13.2.0 |
|
2016-06 |
GP-70 |
GP-160402 |
0419 |
2 |
B |
Enhancements to CS/PS coordination |
13.2.0 |
|
2016-09 |
RP-73 |
RP-161392 |
0428 |
1 |
F |
Miscellaneous EC-GSM-IoT Changes |
13.3.0 |
|
2016-00 |
RP-73 |
RP-161392 |
0429 |
5 |
F |
Miscellaneous corrections to EC-GSM-IoT |
13.3.0 |
|
2016-09 |
RP-73 |
RP-161391 |
0427 |
2 |
B |
Introduction of Dedicated Core Networks in GERAN |
14.0.0 |
|
2016-12 |
RP-74 |
RP-162069 |
0432 |
2 |
A |
Miscellaneous corrections |
14.1.0 |
|
2017-03 |
RP-75 |
RP-170064 |
0434 |
1 |
A |
Clarifying BSS Operation for EC-GSM |
14.2.0 |
|
2017-06 |
RP-76 |
RP-170923 |
0430 |
6 |
B |
Introduction of Multilateration |
14.3.0 |
|
2017-06 |
RP-76 |
RP-170923 |
0435 |
1 |
B |
Introduction of PS domain transport for Multilateration Timing Advance information transfer |
14.3.0 |
|
2017-06 |
RP-76 |
RP-170924 |
0436 |
4 |
B |
Introduction of new UL coverage class CC5 for UL MCL improvement |
14.3.0 |
|
2017-06 |
RP-76 |
RP-170926 |
0437 |
– |
F |
Addition of DECOR rerouting cause code |
14.3.0 |
|
2017-06 |
RP-76 |
RP-170925 |
0438 |
1 |
F |
Introduction of enhanced DECOR for GERAN |
14.3.0 |
|
2017-06 |
RP-76 |
RP-170927 |
0440 |
1 |
A |
Removing Unecessary References to eDRX for SGSN Paging Procedure |
14.3.0 |
|
2017-09 |
RP-77 |
RP-171594 |
0441 |
1 |
F |
Correction of the BTS Reception Accuracy Level IE |
14.4.0 |
|
2018-06 |
RP-80 |
RP-180825 |
0443 |
2 |
F |
Introduction of Restricted Use of Enhanced Coverage |
14.5.0 |
|
2018-06 |
RP-80 |
RP-180822 |
0444 |
1 |
B |
Security Enhancement for MTA in network configuration without LLC security |
15.0.0 |
|
2018-06 |
RP-80 |
RP-180821 |
0445 |
1 |
B |
Energy efficiency enhancements for EC-GSM-IoT MS in idle mode |
15.0.0 |
|
2020-07 |
RP-88e |
– |
– |
– |
– |
Upgrade to Rel-16 version without technical change |
16.0.0 |
|
2022-03 |
RP-95e |
– |
– |
– |
– |
Upgrade to Rel-17 version without technical change |
17.0.0 |