Cisco Cisco ASR 5000
Serving GPRS Support Node (SGSN) Overview
▀ Features and Functionality
▄ SGSN Administration Guide, StarOS Release 18
SGSN Support For Sending Extended Bits Bi-directionally
The SGSN now supports sending extended bitrates in both uplink and downlink directions. Extended bitrates are
included in both uplink and downlink direction when the negotiated birate indicates that extended birates should be
included in one direction. A new CLI
included in both uplink and downlink direction when the negotiated birate indicates that extended birates should be
included in one direction. A new CLI
ranap bidirectional-always ext-mbr-ie
is added under the RNC
Configuration mode to enable sending extended bitrates bi-directionally.
SGSN support to Ignore PDP Data Inactivity
The SGSN supports options to configure PDP Data Inactivity detection duration and actions to be performed on timeout
under the APN-Profile. The following configurable actions are supported under APN-Profile in case of PDP Data
Inactivity detection in the PDP context:
under the APN-Profile. The following configurable actions are supported under APN-Profile in case of PDP Data
Inactivity detection in the PDP context:
1. De-activate all PDPs of the subscriber
2. De-activate all PDPs of the bundle (all linked PDPs)
3. Detach the subscriber. This action is triggered when:
2. De-activate all PDPs of the bundle (all linked PDPs)
3. Detach the subscriber. This action is triggered when:
Data in-activity is detected for all PDPs
Data in-activity is detected for any of the PDPs
On the Detection of the PDP Data Inactivity, depending on the configuration option the SGSN either de-activates the
PDP or detaches the subscriber.
PDP or detaches the subscriber.
A new CLI
ignore-pdp-data-inactivity
is added to provide an option under the IMEI-Profile to ignore PDP Data
Inactivity configuration for one or more IMEIs. On configuring this CLI, the SGSN ignores the application of in-activity
configuration (configured in the APN-Profile) for a specified set of IMEI's.
configuration (configured in the APN-Profile) for a specified set of IMEI's.
Short Message Service (SMS over Gd)
The SGSN implements a configurable Short Message Service (SMS) to support sending and receiving text messages up
to 140 octets in length. The SGSN handles multiple, simultaneous messages of both types: those sent from the MS/UE
(SMS-MO: mobile originating) and those sent to the MS/UE (SMS-MT: mobile terminating). Short Message Service is
disabled by default.
to 140 octets in length. The SGSN handles multiple, simultaneous messages of both types: those sent from the MS/UE
(SMS-MO: mobile originating) and those sent to the MS/UE (SMS-MT: mobile terminating). Short Message Service is
disabled by default.
After verifying a subscription for the PLMN’s SMS service, the SGSN connects with the SMSC (short message service
center), via a Gd interface, to relay received messages (from a mobile) using MAP-MO-FORWARD-REQUESTs for
store-and-forward.
center), via a Gd interface, to relay received messages (from a mobile) using MAP-MO-FORWARD-REQUESTs for
store-and-forward.
In the reverse, the SGSN awaits messages from the SMSC via MAP-MT-FORWARD-REQUESTs and checks the
subscriber state before relaying them to the target MS/UE.
subscriber state before relaying them to the target MS/UE.
The SGSN will employ both the Page procedure and MNRG (mobile not reachable for GPRS) flags in an attempt to
deliver messages to subscribers that are absent.
deliver messages to subscribers that are absent.
The SGSN supports
charging for SMS messages, and
lawful intercept of SMS messages