Systems and procedures of non-terrestrial network timing relationship

An apparatus comprised in a user equipment (UE), comprising:

• one or more processors configured to:
• determine a reference sub-carrier spacing (SCS) used by a non-terrestrial network;
• determine that a current cell-specific scheduling offset value (Koffset) should be updated;
• determine a number of blind repetitions of updated timing advance (TA) information to transmit to the non-terrestrial network;
• transmit the determined number of blind repetitions of the updated TA information;
• receive an updated Koffset that represents a time at least as large as a roundtrip propagation delay between the UE and a timing reference point of the non-terrestrial network, wherein the updated Koffset is expressed in units of slots in terms of the reference SCS;
• calculate a number of slots representing the updated Koffset in terms of a local SCS used for the UE's active uplink bandwidth part (BWP);
• and
• perform uplink scheduling, wherein the uplink timing is adjusted by the calculated number of slots in terms of the local SCS.

A non-transitory computer-readable memory medium storing software instructions that, when executed by a processor of a user equipment (UE) device, cause the UE device to:

• determine a reference sub-carrier spacing (SCS) used by a non-terrestrial network;
• determine that a current cell-specific scheduling offset value (Koffset) should be updated;
• determine a number of blind repetitions of updated timing advance (TA) information to transmit to the non-terrestrial network;
• transmit the determined number of blind repetitions of the updated TA information;
• receive an updated Koffset that represents a time at least as large as a roundtrip propagation delay between the UE and a timing reference point of the non-terrestrial network, wherein the updated Koffset is expressed in units of slots in terms of the reference SCS;
• calculate a number of slots representing the updated Koffset in terms of a local SCS used for the UE's active uplink bandwidth part (BWP);
• and
• perform uplink scheduling, wherein the uplink timing is adjusted by the calculated number of slots in terms of the local SCS.