Cisco Cisco Packet Data Interworking Function (PDIF) Notas De La Versión
SGSN Changes in Release 15.0
▀ SGSN Enhancements for September 30, 2013
▄ Cisco ASR 5x00 Release Change Reference
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SGSN and if the SGW receives downlink data it can send the GTPU packet directly to SGSN instead of sending
Downlink Data Notifications to both SGSN and MME. When Downlink Data Notifications are sent to both SGSN and
MME, paging is triggered at both SGSN and MME. In some cases an Intra-RAU can be followed by an Iu release if
there are no follow on requests and the SGSN will send a Release Access Bearer to SGW. This results in additional
signaling.
Downlink Data Notifications to both SGSN and MME. When Downlink Data Notifications are sent to both SGSN and
MME, paging is triggered at both SGSN and MME. In some cases an Intra-RAU can be followed by an Iu release if
there are no follow on requests and the SGSN will send a Release Access Bearer to SGW. This results in additional
signaling.
New Behavior: The following behavior changes are implemented in this release:
The SGSN will not send Modify Bearer Request to SGW if an Intra-RAU follows an ISR activation (provided
the Intra RAU does not change the Serving PLMN / RAT Type and there is no change in SGW)
The SGW will send Downlink Data Notification if it receives any downlink GTPU packet.
The release 15.0 SGW supports staggered paging. Downlink Data Notification is sent by the SGW in a staggered
manner, first to the last known node and then to other node. This avoids dual paging.
Due to the changes listed above Modify Bearer Request is no longer triggered during an ISR Intra RAU scenario.
New counter to Peg Location Report Drop Statistics
Previous Behavior: No counters present to peg the drop statistics of Location Report.
New Behavior: A new counter is added to the show command
show gmm-sm statistics iups-service
verbose
to count the Location Report Drop Statistics.
New Counters To Peg Rejects of Authentication and Ciphering Response
Previous Behavior: Counters are present to peg Reject of Authentication and Ciphering response due to the following
reasons:
reasons:
XRes mismatch
Too many Sync failure
Too many Mac failure
GSM Auth Unacc
Sync does not have AUTS
New Behavior: Counters have been added to the show command
show gmm-sm statistics verbose
to peg the
Authentication and Ciphering response reject due to reasons other than the ones mentioned above. New counters are
introduced for 2G and 3G scenarios.
introduced for 2G and 3G scenarios.
New Traps Added
Previous Behavior: The existing system does not support “CISCO-ENTITY-REDUNDANCY-MIB” traps.
New Behavior: The new system has support for “CISCO-ENTITY-REDUNDANCY-MIB” traps.
Impact: Support for “CISCO-ENTITY-REDUNDANCY-MIB” traps now available.
Optimizing SS7RD Route Structure
Various changes have been made to optimize route structures and memory usage.
Previous Behavior: Using the
no peer-server id instance
command caused the removal of the peer server
from the configuration. All remote routes via the peer server were not removed.