TAR-Config (TAR-Config-r17)
TAR-Config-r17 is an RRC information element of 3GPP TS 38.331 (38331), the 5G NR Radio Resource Control (RRC) protocol.
Definition
The IE TAR-Config is used to configure Timing Advance reporting in non-terrestrial networks and ATG network.
TAR-Config-r17 ::= SEQUENCE {
offsetThresholdTA-r17 ENUMERATED {ms0dot5, ms1, ms2, ms3, ms4, ms5, ms6 ,ms7, ms8, ms9, ms10, ms11, ms12,
ms13, ms14, ms15, spare13, spare12, spare11, spare10, spare9, spare8, spare7,
spare6, spare5, spare4, spare3, spare2, spare1} OPTIONAL, -- Need R
timingAdvanceSR-r17 ENUMERATED {enabled} OPTIONAL, -- Need R
...
}Fields (2)
| Field | Description |
|---|---|
| offsetThresholdTA-r17 ENUMERATED {ms0dot5, ms1, ms2, ms3, ms4, ms5, ms6 ,ms7, ms8, ms9, ms10, ms11, ms12, ms13, ms14, ms15, spare13, spare12, spare11, spare10, spare9, spare8, spare7, spare6, spare5, spare4, spare3, spare2, spare1} · OPTIONAL Need R | Offset for TA reporting as specified in TS 38.321 [3]. Network only configures this parameter for MCG. For offsetThresholdTA-r17 , value ms0dot5 corresponds to 0.5 ms, value ms1 corresponds to 1 ms, and so on. Network only configures offsetThresholdTA-r18 for ATG, which is in unit of symbols based on the subcarrier spacing of the BWP indicated by firstActiveDownlinkBWP-Id if received in the same RRC message, otherwise, it is based on the subcarrier spacing of the active DL BWP of the PCell when offsetThresholdTA-r18 is received. Once configured, the value of TA offset threshold does not change autonomously by the UE with BWP switching. |
| timingAdvanceSR-r17 ENUMERATED {enabled} · OPTIONAL Need R | Used to configure whether a Timing Advance report may trigger a Scheduling Request as specified in TS 38.321 [3]. |