Section: 10.5.6.6 SM cause
Content: The purpose of the SM cause information element is to indicate the reason why a session management request is rejected. The SM cause is a type 3 information element with 2 octets length. The SM cause information element is coded as shown in figure 10.5.139/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ]  and table 10.5.157/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ] . Figure 10.5.139/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ] : SM cause information element Table 10.5.157/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ] : SM cause information element