3GPP 24.501 v20.0.0 — the document's own text
9.11.3.47 Request 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 Request type information element is to indicate the type of the 5GSM message.
The Request type information element is coded as shown in figure 9.11.3.47.1 and table 9.11.3.47.1.
The Request type is a type 1 information element.
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| Request type IEI | 0spare | Request type value | octet 1 |
Figure 9.11.3.47.1: Request type information element
Table 9.11.3.47.1: Request type information element
| Request type value (octet 1, bit 1 to bit 4) | ||||
|---|---|---|---|---|
| Bits | ||||
| 3 | 2 | 1 | ||
| 0 | 0 | 1 | initial request | |
| 0 | 1 | 0 | existing PDU session | |
| 0 | 1 | 1 | initial emergency request | |
| 1 | 0 | 0 | existing emergency PDU session | |
| 1 | 0 | 1 | modification request | |
| 1 | 1 | 0 | MA PDU request (NOTE) | |
| 1 | 1 | 1 | reserved | |
| All other values are unused and shall be interpreted as "initial request", if received by the network. | ||||
| NOTE: This value shall be interpreted as "initial request", if received by a network not supporting MA PDU sessions. |