3GPP 24.501 v20.0.0 — the document's own text
8.2.18.1 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 SERVICE REJECT message is sent by the AMF to the UE in order to reject the service request procedure. See table 8.2.18.1.1.
Message type: SERVICE REJECT
Significance: dual
Direction: network to UE
Table 8.2.18.1.1: SERVICE REJECT 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 | |
| Service reject message identity | Message type9.7 | M | V | 1 | |
| 5GMM cause | 5GMM cause9.11.3.2 | M | V | 1 | |
| 50 | PDU session status | PDU session status9.11.3.44 | O | TLV | 4-34 |
| 5F | T3346 value | GPRS timer 29.11.2.4 | O | TLV | 3 |
| 78 | EAP message | EAP message9.11.2.2 | O | TLV-E | 7-1503 |
| 6B | T3448 value | GPRS timer 29.11.2.4 | O | TLV | 3 |
| 75 | CAG information list | CAG information list9.11.3.18A | O | TLV-E | 3-n |
| 2C | Disaster return wait range | Registration wait range9.11.3.84 | O | TLV | 4 |
| 71 | Extended CAG information list | Extended CAG information list9.11.3.86 | O | TLV-E | 3-n |
| 3A | Lower bound timer value | GPRS timer 39.11.2.5 | O | TLV | 3 |
| 1D | Forbidden TAI(s) for the list of "5GS forbidden tracking areas for roaming" | 5GS tracking area identity list9.11.3.9 | O | TLV | 9-114 |
| 1E | Forbidden TAI(s) for the list of "5GS forbidden tracking areas for regional provision of service" | 5GS tracking area identity list9.11.3.9 | O | TLV | 9-114 |
| 63 | Access technology utilization control | Access technology utilization control9.11.3.110 | O | TLV | 4-5 |
NOTE: It is possible for AMFs compliant with version 17.7.0 or 17.8.0 of this specification to send the Forbidden TAI(s) for the list of "5GS forbidden tracking areas for roaming" IE with IEI of value "3B" for this message or the Forbidden TAI(s) for the list of "5GS forbidden tracking areas for regional provision of service" IE with IEI of value "3C" for this message.