Section: Suspend Notification
Content: The Suspend Notification message shall be sent on the S11 interface by the MME to the SGW and on the S5/S8 interface by the SGW to the PGW as part of the 1xRTT CS fallback procedures in 3GPP TS 23.272[ Circuit Switched (CS) fallback in Evolved Packet System (EPS); Stage 2 ]  [21]. The Suspend Notification message shall be sent on the S3 interface by the SGSN to the MME, on the S11 interface by the MME to the SGW, and on the S5/S8 interface by the SGW to the PGW as part of the SRVCC procedures in 3GPP TS 23.216[ Single Radio Voice Call Continuity (SRVCC); Stage 2 ]  [43] or the CS fallback from E-UTRAN access to UTRAN/GERAN CS domain access related procedures in 3GPP TS 23.272[ Circuit Switched (CS) fallback in Evolved Packet System (EPS); Stage 2 ]  [21]. The Suspend Notification message shall be sent on the S16 interface as per the inter-SGSN suspend procedures in 3GPP TS 23.060[ General Packet Radio Service (GPRS); Service description; Stage 2 ]  [35]. The Suspend Notification message shall be sent on the S16, the S4 and the S5/S8 interfaces as part of the SRVCC from UTRAN (HSPA) to GERAN without DTM support procedure in 3GPP TS 23.216[ Single Radio Voice Call Continuity (SRVCC); Stage 2 ]  [43]. The Suspend Notification message shall be sent on the S4 and the S5/S8 interfaces as part of the CS fallback from E-UTRAN to GERAN CS domain related procedures in 3GPP TS 23.272[ Circuit Switched (CS) fallback in Evolved Packet System (EPS); Stage 2 ]  [21]. After receiving a Suspend Notification message, the SGW/PGW marks all the non-GBR bearers as suspended status. The PGW should discard packets it receives for the suspended UE. Table 7.4.1-1 specifies the presence requirements and conditions of the IEs in the message. Table -1: Information Element in Suspend Notification