3GPP 24.501 v20.0.0 — the document's own text
9.11.4.23 Control plane only 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 control plane only indication information element is to indicate that a PDU session is only for control plane CIoT 5GS optimization.
The control plane only indication information element is coded as shown in figure 9.11.4.23.1.
The control plane only indication is a type 1 information element.
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| Control plane only indication IEI | 0Spare | 0Spare | 0Spare | CPOI value | octet 1 |
Figure 9.11.4.23.1: Control plane only indication information element
Table 9.11.4.23.1: Control plane only indication information element
| Control plane only indication value (CPOI) (octet 1) | |
|---|---|
| Bit | |
| 1 | |
| 0 | reserved |
| 1 | PDU session can be used for control plane CIoT 5GS optimization only |
| The value 0 is reserved. If received, it shall be interpreted as if the control plane only indication IE was not included in the message. | |
| Bits 4 to 2 of octet 1 are spare and shall be all encoded as zero. | |