7.7.93 Extended Common Flags
29.0603GPPGeneral Packet Radio Service (GPRS)GPRS Tunnelling Protocol (GTP) across the Gn and Gp interfaceRelease 17TS
The Extended Common Flags element is used to hold values for multiple bit flags.
The Unauthenticated IMSI bit field is relevant for Create PDP Context Request, Forward Relocation Request, Relocation Cancel Request, MS Info Change Notification Request and SGSN Context Response and shall be set to 1 if the IMSI present in the message is not authenticated and is for an emergency attached MS.
The CCRSI (CSG Change Reporting Support Indication) bit field is relevant for Create PDP Context Request and Update PDP Context Request messages and shall be set to 1 if the SGSN supports the CSG Information Change Reporting mechanism and if the SGSN’s operator policy permits reporting of User CSG Information change to the operator of the GGSN.
The CPSR (CS to PS SRVCC indication) bit field is relevant for the Update PDP Context Request and shall be set to 1 during the UTRAN/GERAN to UTRAN (HSPA) SRVCC Procedure as specified in 3GPP TS 23.216 [50].
The RetLoc (Retrieve Location) bit field is relevant for a GGSN initiated Update PDP Context Request message and shall be set to 1 if the GGSN requests the SGSN to provide the user’s location information.
The VB (Voice Bearer) bit field is relevant for the Delete PDP Context Request and shall be set to 1 for PDP context used for voice during the UTRAN (HSPA) to UTRAN/GERAN SRVCC Procedure as specified in 3GPP 23.216 [50].
NOTE 1: The Voice Bearer bit corresponds to the PS to CS handover indicator defined in 3GPP TS 23.203 [39].
The PCRI (P-CSCF Restoration Indication) bit field is relevant for the SGSN-initiated Update PDP Context Request and shall be set to 1 during the HSS-based P-CSCF restoration procedure to indicate a request to trigger a P-CSCF restoration for the corresponding user, as specified in 3GPP TS 23.380 [57].
The BDWI (Buffered DL Data Waiting Indication) bit field is relevant for the SGSN Context Response message and shall be set to 1 when it is required to forward to the UE DL data buffered in the old SGW or in the old Gn/Gp SGSN during a RAU/TAU procedure.
The UASI (UE available for Signaling Indication) bit field is relevant for the Update PDP Context Request message sent from the SGSN. If this bit is set to 1, it indicates that the UE available for end to end signalling, and that the GGSN should re-attempt the pending network initiated procedure.
Bits marked as Spare shall be assigned the value 0 by the sending node and shall not be evaluated by the receiving node.
If a receiving entity receives this IE with a length longer than expected, it shall process the first octet(s) that are expected and shall silently discard the remaining octets.
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Bits |
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Octets |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
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|
1 |
Type=193 (Decimal) |
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2-3 |
Length |
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|
4-n |
UASI |
BDWI |
PCRI |
VB |
RetLoc |
CPSR |
CCRSI |
Unauthenticated IMSI |
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Figure 7.7.93.1: Extended Common Flags Information Element