This MIB module manages the client side
functionality of the Persistent Storage Device(PSD).
This MIB instrumentation is for configuring
data-store(PSD client) feature on GGSN and monitoring
the state of the PSD server(up/down/full).
The Cisco Persistent Storage Device(PSD) is an
extension to existing storage on the Cisco Content
The GGSN currently allows sending of the CDRs to an
active CG, while allowing up to two standby CG's to
be configured. When all the configured CG's become
unavailable, the CDRs get stored at the GGSN and
start using up GGSN resources such as memory. As the
amount of memory is limited on GGSN and failure of
GGSN shall lead to losing these stored CDRs.
Using PSD as temporary storage, shall avoid losses
due to these problems. When all the configured CG's
are unavailable, GGSN needs to backup the live closed
CDR's to a PSD. When any of the CG's shall become
available, GGSN shall retrieve the stored CDR's
automatically from the PSD and forwards them to the
PSD supports the charging protocol(GTP'), version 0
with a few private extensions, which is used to
facilitate the required functionality via UDP.
Acronyms and terms:
CDR Call Detail Record
CID Charging Identification
CG Charging Gateway
CGF Charging Gateway Functionality
ETSI European Telecommunications Standards
Ga Name of the interface between SGSN/GGSN and
Gi Name of the interface between GGSN and PDN
Gn Name of the interface between GGSN and SGSN
G-CDR Gateway GPRS Support Node-Call Detail Record
GGSN Gateway GPRS Support Node
GPRS General Packet Radio Service
GSM Global System for Mobile communication
GTP GPRS Tunneling Protocol
GTP' GTP enhanced for charging
IE Information Element
MS Mobile Station
PDN Packet Data Network
PDP Packet Data Protocol
SGSN Serving GPRS support Node
TOS Type of Service.
PSD Persistence Storage Device.