Cisco Cisco Packet Data Gateway (PDG)
MME Changes in Release 17
MME Enhancements for 17.0 ▀
Release Change Reference, StarOS Release 17 ▄
321
CSCum68847, CSCum82648 - MME to support Network Provided Location Info
(NPLI) for IMS
Feature Changes
Network Provided Location Info for IMS
Network provided Location Info (NPLI) enables the MME to send user location information (ULI) to the P-GW/S-GW
(and consequently PCRF) in a number of Session Management messages. This information is required for Lawful
Intercept (LI), VoLTE, aids in charging in the IMS domain.
(and consequently PCRF) in a number of Session Management messages. This information is required for Lawful
Intercept (LI), VoLTE, aids in charging in the IMS domain.
In this release, the MME supports the PCC-EPC based framework, defined in 3GPP TR 23.842 section 6.4, which
allows the P-CSCF to request the user location through PCRF when it needs it (for example, at voice call
establishment).
allows the P-CSCF to request the user location through PCRF when it needs it (for example, at voice call
establishment).
This feature requires that a valid license key be installed. Contact your Cisco Account or Support representative for
information on how to obtain a license.
information on how to obtain a license.
No special configuration is required to enable this functionality.
The MME can now report the Location of a UE through the GTPv2 messages using the NPLI IEs (ULI Info, ULI-
Timestamp and the UE-Timezone). The ULI Info is now included in the following GTPv2 messages:
Timestamp and the UE-Timezone). The ULI Info is now included in the following GTPv2 messages:
Create Session Request
Create Bearer Response
Delete Session Request
Delete Bearer Response
Update Bearer Response
Delete Bearer Command
This feature also includes:
Support for Retrieve Location Indication in the Update Bearer Request message. For this feature, the MME does
not retrieve specific location information of UE but instead uses the last stored location information.
Support for ULI timestamp in Delete Bearer Response, Delete Session Request and Delete Bearer Command
messages. (Added newly in 3GPP TS 29.274 V11.8.0)
Support for UE Time Zone in Delete Bearer Command messages.
Note: NPLI related IEs in CSReq and DSReq messages will be sent only in case of PDN establishment, but not in case
of SGW relocation.
of SGW relocation.
CSCuo88872 - TAU procedure counters incremented in wrong bucket
Feature Changes
Updated Counters
Old Behavior: The counter for TAU triggered after a S10 handover were incorrectly counted under Intra MME TAU
failure counters.
failure counters.