3GPP 24.501 v20.0.0 — the document's own text
9.11.3.7 5GS registration 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 5GS registration type information element is to indicate the type of the requested registration.
The 5GS registration type information element is coded as shown in figure 9.11.3.7.1 and table 9.11.3.7.1.
The 5GS registration type is a type 1 information element with a length of 1 octet.
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| 5GS registration type IEI | FOR | 5GS registration type value | octet 1 |
Figure 9.11.3.7.1: 5GS registration type information element
Table 9.11.3.7.1: 5GS registration type information element
| 5GS registration type value (octet 1, bits 1 to 3) | ||||
|---|---|---|---|---|
| Bits | ||||
| 3 | 2 | 1 | ||
| 0 | 0 | 1 | initial registration | |
| 0 | 1 | 0 | mobility registration updating | |
| 0 | 1 | 1 | periodic registration updating | |
| 1 | 0 | 0 | emergency registration | |
| 1 | 0 | 1 | SNPN onboarding registration | |
| 1 | 1 | 0 | disaster roaming mobility registration updating | |
| 1 | 1 | 1 | disaster roaming initial registration | |
| All other values are unused and shall be interpreted as "initial registration", if received by the network. | ||||
| Follow-on request bit (FOR) (octet 1, bit 4) | ||||
| Bit | ||||
| 4 | ||||
| 0 | No follow-on request pending | |||
| 1 | Follow-on request pending |