AS Session Modify

Figure 2-31 illustrates the AS Session modify procedure to replace existing QoS properties. To update the established AS session, the SCS/AS sends an HTTP PUT message to the Individual AS Session with Required QoS Subscription resource requesting to replace all properties in the existing resource, addressed by the URI received in the response to the request that has created the resource. The UE IP address has to remain unchanged from previously provided values. After receiving such a message, the QoS Action in OCSG converts it to a HTTP PUT message to an Application QoS Service resource and sends it to the REST QoS plugin. This message contains the QoS properties fetched from the QoS reference configuration based on the QoS reference received in T8 message or SCS/AS configuration. The REST QoS plugin then makes the change and interacts with the PCRF to modify the Rx session by triggering an Rx-AAR.

Figure 2-31 AS Session Modify