9/18/2023 0 Comments So where are you loose ends rarThe AF receives an INVITE 200 message and sends an AAR message to the Policy Charging through the Rx interface to enable bearer gating control.The AF sends an RAA message to the Policy Charging through the Rx interface.The Policy Charging sends an RAR message to the AF through the Rx interface, indicating that the resource is successfully reserved.The PCEF sends a CCR message to the PCEF through the Gx interface.The UE sends a request to the PCEF to establish an IP-connectivity access network (IP-CAN) session. A subscriber attempts to make an IMS common call through E-URAN.In this solution, the Embedded PCRF connects to the P-CSCF through the Rx interface and to the P-GW through the Gx interface. After carriers use the LTE + IMS core network, PCC-based VoLTE solution can be used. In the 3GPP specifications, the IMS is defined as a part of the LTE core network. This feature enables subscribers to make high-quality voice and video calls on LTE networks. This feature helps carriers to use PCC-based VoLTE solution to implement IP link–based high-quality voice and video calls on the LTE network. The section describes only the Embedded PCRF capability in the VoLTE solution. The AF and the Rx interface between the PCRF and AF are defined in the 3GPP specifications and they are mainly used by the PCRF to connect third-party applications (for example, OTT) and IMS networks to implement PCC-based VoLTE.
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