Gateway Location Application (GLA) Description

Gateway Location Application (GLA) is a DSR Application that retrieves subscriber data stored in Policy Session Binding Repository (pSBR) provided by Policy DRA. The GLA is deployed and must be in the same Resource Domain as DA-MPs activated with Policy DRA. No additional Resource Domain configuration is needed specifically for GLA in the DSR GUI.

After a DA-MP is activated with the GLA, it receives a Request (Get Gateway Request (GGR)) generated by the Gateway Query Client (GQC), then decodes subscriber information (IMSI or MSISDN), then queries the pSBR (via ComAgent within the Gateway Query Server (GQS) or DSR). The GLA generates an Answer (Get Gateway Answer (GGA)) with subscriber information that includes the number of bindings for the subscriber, and the following information is included for each session:

• Access Point name
• PCEF FQDN
• Creation timestamp

The GLA is dependent on Policy DRA to populate data in pSBR and thus GLA will use Activation/Deactivation rules in the following conditions:

• The GLA is activated using the same mechanism as Policy DRA. It will be activated at the NOAM, and activation is performed so that it activates all SOAMs under a common NOAM.
• GLA cannot be activated unless Policy DRA is activated and PCRF-Pooling has been enabled.
• Policy DRA cannot be deactivated if GLA is activated.

To simplify deployment of GLA, it is piggybacked on Policy-DRA's configuration of DA-MPs within its Resource Domain and configuration of ComAgent connections between DA-MPs and pSBRs.

If PCRF pooling is enabled with GLA activated, Policy DRA stores all information required by GLA.