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Serving GPRS Support Node (SGSN) Overview
Features and Functionality ▀
SGSN Administration Guide, StarOS Release 18 ▄
Local Mapping of MBR
The SGSN provides the ability to map a maximum bit rate (MBR) value (provided by the HLR) to an HSPA MBR
value.
value.
The mapped value is selected based on the matching MBR value obtained from the HLR subscription. QoS negotiation
then occurs based on the converted value.
then occurs based on the converted value.
This feature is available within the operator policy framework. MBR mapping is configured via new keywords added to
the
the
qos class
command in the APN Profile configuration mode. A maximum of four values can be mapped per QoS
per APN.
Important:
To enable this feature the
qos prefer-as-cap
, also a command in the APN Profile configuration
mode, must be set to either
both-hlr-and-local
or to
hlr subscription
.
Local QoS Capping
The operator can configure a cap or limit for the QoS bit rate.
The SGSN can now be configured to cap the QoS bit rate parameter when the subscribed QoS provided by the HLR is
lower than the locally configured value.
lower than the locally configured value.
Depending upon the keywords included in the command, the SGSN can:
take the QoS parameter configuration from the HLR configuration.
take the QoS parameter configuration from the local settings for use in the APN profile.
during session establishment, apply the lower of either the HLR subscription or the locally configured values.
Location Change Reporting on the S4-SGSN
3G/2G Location Change Reporting on the SGSN facilitates location-based charging on the P-GW by providing the UE’s
location information when the UE is in connected mode.
location information when the UE is in connected mode.
The Gn-SGSN supports 2G and 3G location change reporting via user location information (ULI) reporting to the
GGSN. For details, see the feature section 3G-2G Location Change Reporting.
GGSN. For details, see the feature section 3G-2G Location Change Reporting.
With Release 16.0, the S4-SGSN also supports 2G and 3G location change reporting per 3GPP 29.274 release 11.b, if
the P-GW requests it. With this feature enhancement configured, the S4-SGSN is ready to perform ULI reporting per
PDN connection via GTPv2. Reporting only begins after the S4-SGSN receives a reporting request from the P-GW. The
P-GW generates a request based on charging enforcement and policy enforcement from the policy and charging rules
function PCRF. Location Change Reporting is configured and enabled/disabled per APN.
the P-GW requests it. With this feature enhancement configured, the S4-SGSN is ready to perform ULI reporting per
PDN connection via GTPv2. Reporting only begins after the S4-SGSN receives a reporting request from the P-GW. The
P-GW generates a request based on charging enforcement and policy enforcement from the policy and charging rules
function PCRF. Location Change Reporting is configured and enabled/disabled per APN.
The S4-SGSN’s version of Location Change Reporting has been further enhanced with a network sharing option. If the
network sharing license is installed and if the network sharing feature is enabled, then the operator can configure which
PLMN information the SGSN sends to the P-GW in the ULI or Serving Network IEs.
network sharing license is installed and if the network sharing feature is enabled, then the operator can configure which
PLMN information the SGSN sends to the P-GW in the ULI or Serving Network IEs.
Important:
The S3/S4 license is required to enable S4 functionality. The new "Location-reporting in connected-
mode" license is required to enable Location Change Reporting functionality for the S4-SGSN. This new license is now
required for Location Change Reporting on the Gn-SGSN.
required for Location Change Reporting on the Gn-SGSN.