12 List of system variables
08.183GPPBase Station System (BSS) - Serving GPRS Support Node (SGSN)BSS GPRS ProtocolGeneral Packet Radio Service (GPRS)Release 1999TS
12.1 General Variables
Table 12.1: Procedure timers
Timer mnemonic | Value range | Notes | Relation to other timers |
T1 | 1s<T1<30s | Guards the (un)blocking procedures | none |
T2 | 1s<T2<120s | Guards the reset procedure | none |
T3 | 0.1s<T3<10s | Guards the suspend procedure | none |
T4 | 0.1s<T4<10s | Guards the resume procedure | none |
T5 | 1s<T5<30s | Guards the RA-CAPABILITY-UPDATE procedure | none |
T6 | 0.1s<T6<10s | Guards the DOWNLOAD-BSS-PFC procedure | none |
T7 | 0.1s<T7<10s | Guards the CREATE-BSS-PFC procedure | none |
T8 | 0.1s<T8<10s | Guards the MODIFY-BSS-PFC procedure | none |
T9 | Same as T3314 READY timer in 3GPP TS 24.008. Minimum 6 seconds | 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 seconds. |
Table 12.2: 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 |
12.2 Flow control variables
Table 12.3: Flow control variables
Variable mnemonic | Value range | Notes | Relation to other variables |
Th | 5s<Th<6000s | Interval after Flow-Control-MS before SGSN may use SGSN generated Bmax and R | none |
C | 1s<C<10s | Minimum interval between sending of subsequent Flow Control PDUs for a given BVC or MS | C<Th |
Annex A (informative):
Change history
Meeting | CR | REV | Tdoc | SUBJECT | NEW_VERS |
A078 | MS Radio Access Capability | 8.0.0 | |||
A083 | 1 | FLUSH-LL: Transfer of LLC-PDU(s) to new routing area | 8.1.0 | ||
A084 | 1 | BSSGP error handling | 8.1.0 | ||
SMG#31 | A095 | 1 | Length of V part of MS Radio Access Capability | 8.2.0 | |
SMG#31 | A098 | DL-UNITDATA PDU without DRX parameters IE | 8.2.0 | ||
SMG#31bis | A089 | 2 | 828/00 | Gb Interface: BSS Packet Flow Context Procedures Implemented | 8.3.0 |
SMG#31bis | A102 | 2 | 827/00 | Gb Interface: BSSGP feature negotiation. | 8.3.0 |
GP-01 | A106 | 139/00 | DTM: reuse of the GPRS Suspension procedure in cells with no DTM capabilities | 8.4.0 | |
GP-01 | A130 | 135/00 | DTM: download of the IMSI from the SGSN to the BSC | 8.4.0 | |
GP-01 | A107 | 309/00 | Gb Interface: BSS Packet Flow Context Procedures | 8.4.0 | |
GP-01 | A104 | 129/00 | DTM: tunnelling of GPRS information on the main DCCH | 8.4.0 | |
GP-01 | – | – | – | References changed from GSM xx.xx to 3GPP TS xx.xx | 8.4.0 |
GP-02 | A107 | 3 | 900/00 | Leaky bucket synchronization in BSSGP | 8.5.0 |
– | – | – | – | Small formatting improvements | 8.5.0 |
– | – | – | – | Big editorial blunder corrected. Front page now says 08.18 v 8.5.1, not 04.18 v 8.7.0 | 8.5.1 |
GP-03 | A115 | 1 | GP-010402 | Alignment Octet/LLC-PDU re-union. | 8.6.0 |
GP-03 | A117 | GP-010313 | Correction to 08.18 | 8.6.0 | |
GP-03 | A229 | 2 | Gp-010455 | ‘Service based’ Network initiated Cell Change Order to UTRAN. NOTE: new clause inserted as 11.3.47 instead of 11.3.46, and crossreferences alinged with this | 8.6.0 |
– | – | – | – | Values in 11.3 changed to hexadecimal for the last entries. | 8.6.0 |
GP-04 | A119 | GP-010476 | Cause ‘BVCI Unknown’ allowed in STATUS PDU | 8.7.0 | |
GP-04 | A121 | 1 | GP-010826 | Transmitted values in BSSGP: Two clarifications. | 8.7.0 |
GP-04 | A123 | 1 | GP-010829 | Removal of BVC Reset / BVC blocking procedure contradiction | 8.7.0 |
GP-04 | A124 | 1 | GP-010897 | Introduction of the UTRAN CCO IE in the CREATE-BSS-PFC PDU. | 8.7.0 |
GP-05 | A125 | 1 | GP-011294 | Rate of transmission of flow control packets on Gb interface | 8.8.0 |
GP-05 | A127 | GP-011298 | Bucket indicator, bucket filled ratio. | 8.8.0 | |
GP-06 | A132 | GP-011539 | Clarification of value range of the GPRS Timer T9 (Packet Flow Timer) | 8.9.0 | |
GP-09 | A138 | 3 | GP-021246 | Correction to PFC transfer procedure upon cell change | 8.10.0 |
GP-18 | A143 | GP-040111 | Removal of PFC Transfer Result indication | 8.11.0 | |
GP-19 | A144 | 1 | GP-041093 | Length of ABQP IE in BSSGP | 8.12.0 |