3GPP 24.501 v20.0.0 — the document's own text
8.2.21.1 Message definition
Taught in 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).
The IDENTITY REQUEST message is sent by the AMF to the UE to request the UE to provide specified identity. See table 8.2.21.1.1
Message type: IDENTITY REQUEST
Significance: dual
Direction: AMF to UE
Table 8.2.21.1.1: IDENTITY REQUEST message content
| IEI | Information Element | Type/Reference | Presence | Format | Length |
|---|---|---|---|---|---|
| Extended protocol discriminator | Extended protocol discriminator9.2 | M | V | 1 | |
| Security header type | Security header type9.3 | M | V | 1/2 | |
| Spare half octet | Spare half octet9.5 | M | V | 1/2 | |
| Identity request message identity | Message type9.7 | M | V | 1 | |
| Identity type | 5GS identity type9.11.3.3 | M | V | 1/2 | |
| Spare half octet | Spare half octet9.5 | M | V | 1/2 |