Section: 17.5.9 Trace Session Deactivation procedure
Content: The Trace Session Deactivation procedure occurs when the GGSN indicates to the BM-SC that a Trace Session, previously activated, needs to be deactivated. Figure 34: Trace Session Deactivation procedure 1. When the GGSN has received a Trace Deactivation message from the SGSN, in a Create MBMS Context Request/Update MBMS Context Request, that requires the deactivation of a Trace Session in the BM-SC, the GGSN sends a STR message (containing the Additional MBMS Trace Info AVP) to deactivate a trace session in the BM-SC and to tear down the corresponding Diameter Session previously established to activate the Trace Session. 2. Upon reception of an STR from a GGSN to deactivate a Trace Session, the BM-SC responds with an STA message.