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.
Implemented, but clause numbers needed change relative to CR.

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