Cisco Cisco Packet Data Gateway (PDG)
SGSN Changes in Release 17
▀ SGSN Enhancements for 17.5
▄ Release Change Reference, StarOS Release 17
474
RAB establishment procedure.
UPCQ from SGSN with DTI info.
DPCQ from GGSN.
Activation Reject from SGSN to UE with SM cause as "activation rejected by GGSN"
Customer Impact: Use of this different cause code ensures that statistics and accounts will be properly updated for the
correct SM cause.
correct SM cause.
CSCuv92478 - Wrong CELL-ID/LAC information in S-CDR during relocation
request
Feature Changes
UE Location
Previous Behavior: The User Location Information (ULI) of the User Equipment (UE) consists of RAC, LAC and
SAC values. However, during an intra-SRNS procedure (Relocation) only the RAC and LAC values were available in
the ULI until a subsequent RAU was performed by the UE. This RAU provides the missing SAC value for the ULI.
SAC values. However, during an intra-SRNS procedure (Relocation) only the RAC and LAC values were available in
the ULI until a subsequent RAU was performed by the UE. This RAU provides the missing SAC value for the ULI.
During the transient period between Relocation and the initiation of a RAU, that is, before receiving the SAC value
from the RAU by the UE, if a S-CDR is opened, this S-CDR would contain the new RAC and new LAC value, but the
old SAC value.
from the RAU by the UE, if a S-CDR is opened, this S-CDR would contain the new RAC and new LAC value, but the
old SAC value.
New Behavior: The old known location of the UE is used in the ULI for a S-CDR opened during the transient period,
that is, the period between SGSN receiving a Relocation Request and before it receives the follow up RAU. Also, the
same location information is sent in the Update PDP Context Request message, which is sent to GGSN during the intra-
SRNS procedure for some cases.
that is, the period between SGSN receiving a Relocation Request and before it receives the follow up RAU. Also, the
same location information is sent in the Update PDP Context Request message, which is sent to GGSN during the intra-
SRNS procedure for some cases.
A new keyword
use-old-location-info
is added to the
inter-rnc-procedures
command to enable this
behavior
Command Changes
inter-rnc-procedures
The
use-old-location-info
is a new keyword in this command which enables the SGSN to use the old known
location of the UE during an intra-SRNS procedure. By default, this keyword is disabled.
configure
context context_name
iups-service service_name
[ no ] inter-rnc-procedures use-old-location-info
end
Notes:
no
disables the configuration.