Virtual Sy to extend the PCRF functionality

 Virtual Sy to extend the PCRF functionality.

Modern PCRF systems support multiple Sy links to integrate more than one online charging system (OCS) into the network. Though a particular subscriber can be coupled with a specific OCS, various subscriber segments can be integrated into different ones. The traditional postpaid is the best candidate as it does not interact with any OCS.

Integration of high latency node with low latency node

Though Diameter Protocol is asynchronous by design, response latency is critical. A lightweight node can implement the Sy interface with default or cached status as functionality for PCRF-initiated messages (SLR). In Addition, a spin-off workflow can trigger a high latency node to compute the policy changes and reflect through OCS-initiated messages (SNR). This will trigger PCRF to re-evaluate the policy and implement a re-authentication request (RAR) if needed.

Use Case: Policy control via de-coupled traffic analyzer

Virtual Sy can query the computed result from a de-coupled traffic analyzer based on past usage and control the data session accordingly.

Virtual Sy as DRA to integrate with low latency node

To define an extended policy control for subscribers having existing Sy connectivity, virtual Sy can act as DRA and augment the extended policy counters.

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