3GPP 24.501 v20.0.0 — the document's own text
9.11.3.50 Service type
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 service type information element is to specify the purpose of the service request procedure.
The service type is a type 1 information element.
The service type information element is coded as shown in figure 9.11.3.50.1 and table 9.11.3.50.1.
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| Service typeIEI | Service type value | octet 1 |
Figure 9.11.3.50.1: Service type information element
Table 9.11.3.50.1: Service type information element
| Service type value (octet 1) | ||||
|---|---|---|---|---|
| Service type value | ||||
| Bits | ||||
| 4 | 3 | 2 | 1 | |
| 0 | 0 | 0 | 0 | signalling |
| 0 | 0 | 0 | 1 | data |
| 0 | 0 | 1 | 0 | mobile terminated services |
| 0 | 0 | 1 | 1 | emergency services |
| 0 | 1 | 0 | 0 | emergency services fallback |
| 0 | 1 | 0 | 1 | high priority access |
| 0 | 1 | 1 | 0 | elevated signalling |
| 0 | 1 | 1 | 1 | unused; shall be interpreted as "signalling", if received by the network |
| 1 | 0 | 0 | 0 | unused; shall be interpreted as "signalling", if received by the network |
| 1 | 0 | 0 | 1 | unused; shall be interpreted as "data", if received by the network |
| 1 | 0 | 1 | 0 | unused; shall be interpreted as "data", if received by the network |
| 1 | 0 | 1 | 1 | unused; shall be interpreted as "data", if received by the network |
| All other values are reserved. |