The Abort-Cause AVP (AVP code 500) is of type Enumerated, and determines the cause of an abort session request (ASR) or of a RAR indicating a bearer release. The following values are defined:

When a SIP signaling event triggers external bandwidth management use, the Oracle Communications Session Border Controller removes all SDP information from the signaling message that was the trigger.

The Rx Interface supports the QoS resource reservation for reserving bandwidth in the IP access network. The Rx reference point is used to exchange application level session information between the Policy and Charging Rules Function (PCRF) and the P-CSCF.

Table 4-9 lists the supported Diameter Rx Abort-Session-Answer (ASA) AVPs.

Defines an interface representing the Abort-Session-Request command. From the Diameter Base Protocol (rfc6733.txt) specification: 8.5.1.

An Abort-Session-Request message triggers a deletion of the Diameter session: an Abort-Session-Answer is generated, followed by a CCR-T. The corresponding subscriber host is deleted from the system.

The Abort-Session-Request (ASR) command, indicated by the Command-Code field set to 274 and the "R" bit set in the Command Flags field, is sent from a 3GPP AAA

LTE NAS is the Non-Access Stratum signaling layer between the UE and the EPC control plane. It sits above the radio access signaling path and carries EPS mobility and session-control procedures such as attach, tracking area update, service request, detach, authentication, security handling, and bearer-related signaling.

An Abort-Session-Request message triggers a deletion of the Diameter session: an Abort-Session-Answer is generated, followed by a CCR-T. The corresponding subscriber host is deleted from the system.

While the definition of the access stratum is very different between UMTS and LTE, in both cases the access stratum is responsible for transporting data over the wireless connection and managing radio resources.