3GPP 24.501 v20.0.0 — the document's own text
9.11.3.50A SMS indication
Taught in 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).
The purpose of the SMS indication information element is to indicate that the ability for the UE to use SMS over NAS has changed.
The SMS indication information element is coded as shown in figure 9.11.3.50A.1 and table 9.11.3.50A.1.
The SMS indication is a type 1 information element.
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| SMS indication IEI | 0Spare | 0Spare | 0Spare | SAI | octet 1 |
Figure 9.11.3.50A.1: SMS indication
Table 9.11.3.50A.1: SMS indication
| SMS availability indication (SAI) (octet 1) | |
|---|---|
| Bit | |
| 1 | |
| 0 | SMS over NAS not available |
| 1 | SMS over NAS available |
| Bits 2, 3 and 4 are spare and shall be coded as zero, |