Section: 16.14.3.2.2 Conditional Handover
Content: The same principle as described in 9.2.3.4 applies to NTN unless hereunder specified. NTN supports the following additional trigger conditions upon which UE may execute CHO to a candidate cell, as defined in TS 38.331[ NR; Radio Resource Control (RRC); Protocol specification ]  [12]: - The RRM measurement-based event A4; - A time-based trigger condition; - A location-based trigger condition. Time-based or location-based trigger conditions may be configured independently from the measurement condition for CHO in NTN in at least hard satellite switch case where the service discontinuity gap time length is assumed to be zero or negligible. Otherwise, a time-based or a location-based trigger condition is always configured together with one of the measurement-based trigger conditions (CHO events A3/A4/A5) as defined in TS 38.331[ NR; Radio Resource Control (RRC); Protocol specification ]  [12]. A time-based or a location-based trigger condition is always configured together with one of the measurement-based trigger conditions (CHO events A3/A4/A5) as defined in TS 38.331[ NR; Radio Resource Control (RRC); Protocol specification ]  [12]. It is up to UE implementation how the UE evaluates the time- or location-based trigger condition together with the RRM measurement-based event. When a time-based trigger condition is used, the source gNB may signal the corresponding parameters to a single target gNB via the Source NG-RAN Node to Target NG-RAN Node Transparent Container in an NG-C based handover, see TS 23.502[ Procedures for the 5G System (5GS) ]  [22]. The source gNB signals the corresponding CHO configuration to the UE in the RRC Reconfiguration message during handover execution. When time-based trigger condition is used, the source NG-RAN node should consider the time indicated to the UE to decide when to start the early data forwarding to the target NG-RAN node. Time-based CHO can be performed via RACH-less.