3GPP 24.501 v20.0.0 — the document's own text
4.3.3 Change of UE's usage setting
If the UE operates in single-registration mode, whenever the UE's usage setting changes, the UE shall execute procedures according to table 4.3.3.1:
Table 4.3.3.1: Change of UE's usage setting for a UE in single-registration mode
| UE's usage setting change | Procedure to execute |
|---|---|
| From "data centric" to "voice centric" and "IMS voice not available" over NG-RAN access only | Disable the N1 mode capability for 3GPP access (see clause 4.9.2), if the UE is only registered over 3GPP access (NOTE) |
| From "data centric" to "voice centric" and "IMS voice not available" over satellite NG-RAN | Disable the satellite NG-RAN capability for 3GPP access (see clause 4.9.4). |
| From "data centric" to "voice centric", and "IMS voice not available" over both NG-RAN access and non-3GPP access | Disable the N1 mode capability for 3GPP access (see clause 4.9.2) and non-3GPP access (see clause 4.9.3), if the UE is registered over both 3GPP access and non-3GPP accessDisable the N1 mode capability for 3GPP access (see clause 4.9.2), if the UE is only registered over 3GPP access.Disable the N1 mode capability for non-3GPP access (see clause 4.9.3), if the UE is only registered over non-3GPP access.(NOTE) |
| From "voice centric" to "data centric" and the N1 mode capability for 3GPP access is disabled at the UE due to "IMS voice not available" | Re-enable the N1 mode capability for 3GPP access (see clause 4.9.2) |
| From "voice centric" to "data centric" and satellite NG-RAN capability is disabled at the UE due to "IMS voice not available" | Re-enable the satellite NG-RAN capability for 3GPP access (see clause 4.9.4). |
| From "data centric" to "voice centric" and "IMS voice not available" over non-3GPP access only | Disable the N1 mode capability for non-3GPP access (see clause 4.9.3), if the UE is only registered over non-3GPP access |
| From "voice centric" to "data centric", and the N1 mode capability for non-3GPP access is disabled at the UE due to "IMS voice not available" | Re-enable the N1 mode capability for non-3GPP access (see clause 4.9.3) |
| NOTE: If the UE is registered over 3GPP access and has a persistent PDU session, then the UE waits until the radio bearer associated with the persistent PDU session has been released. |