Cisco Cisco Packet Data Interworking Function (PDIF) Notas De La Versión
MME Changes in Release 15.0
MME Enhancements for June 6, 2014 ▀
Cisco ASR 5x00 Release Change Reference ▄
309
CSCuh22222 - Allow the MME to construct the Destination Realm from the
MNC/MCC
Feature Changes
Support for Constructing Dynamic Destination Realm for Foreign Subscribers
Previous Behavior: The MME could not construct a dynamic destination realm for foreign subscribers and instead
always used the configured peer realm as the destination realm.
always used the configured peer realm as the destination realm.
For a foreign subscriber, the MME does not know the HSS nodes in all the foreign PLMNs. In this case the MME routes
S6a/S6d requests directed to foreign PLMNs via a Diameter Routing Agent (DRA) using only the destination realm.
The DRA in turn routes the request to the correct HSS based on the destination realm. In order to accomplish this, the
MME needs to dynamically construct requests to the DRA/HSS with a Destination Realm representing the foreign
PLMN of the UE.
S6a/S6d requests directed to foreign PLMNs via a Diameter Routing Agent (DRA) using only the destination realm.
The DRA in turn routes the request to the correct HSS based on the destination realm. In order to accomplish this, the
MME needs to dynamically construct requests to the DRA/HSS with a Destination Realm representing the foreign
PLMN of the UE.
New Behavior: The MME now can derive the EPC Home Network Realm/Domain based on the user's IMSI (MNC and
MCC values) and use it as the Destination Realm.
MCC values) and use it as the Destination Realm.
A new HSS Peer Service Mode command has been introduced to enable this functionality. Refer to the following
section “Command Changes” for more details.
section “Command Changes” for more details.
Because MNCs can be 2 or 3 digits long, to provide the ability for an operator to configure the MCC and MNC of
foreign PLMNs, the operator policy of the subscriber map is used to determine the MNC value and the length of the
MNC.
foreign PLMNs, the operator policy of the subscriber map is used to determine the MNC value and the length of the
MNC.
Refer to Configuring Dynamic Destination Realm Construction for Foreign Subscribers in Chapter 2 of the MME
Administration Guide for more information about configuring this feature.
Administration Guide for more information about configuring this feature.
Command Changes
dynamic-destination-realm
This new HSS Peer Service Mode command enables the MME to construct the destination realm using the MCC and
MNC of foreign subscribers. By default, the MME uses the peer realm as destination realm.
MNC of foreign subscribers. By default, the MME uses the peer realm as destination realm.
configure
context ctxt_name
hss-peer-service service_name
[ default | no ] dynamic-destination-realm
end
Important:
service_name
must be unique across all contexts.
Note: For home subscribers, the MME will always use the configured peer realm as destination-realm, regardless if
dynamic-destination-realm is enabled.
dynamic-destination-realm is enabled.