Method and apparatus for large propagation delay in a wireless communication system
A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE receives a Downlink Control Information (DCI) format from a base station. The UE applies a timing offset to information indicated by the DCI format.
1. A method of a User Equipment (UE), comprising:
receiving a Downlink Control Information (DCI) format from a base station; and
applying a timing offset to first information indicated by the DCI format but not to second information indicated by the DCI format, wherein the first information comprises one or more first slot formats and the second information comprises one or more second slot formats, wherein the applying comprises:
determining, by the UE, the one or more first slot formats indicated by the DCI format;
determining, by the UE and based upon the timing offset, one or more slots; and
applying, by the UE, the one or more first slot formats indicated by the DCI format to the one or more slots determined, by the UE, based upon the timing offset.
2. The method of claim 1 , wherein:
the receiving the DCI format is performed in slot n.
3. The method of claim 2 , wherein:
an initial slot of slots for which slot formats are indicated by the DCI format is slot n+X, wherein X is equal to the timing offset.
4. The method of claim 1 , comprising:
determining the timing offset based upon a timing advance (TA) value of the UE.
5. The method of claim 1 , comprising:
receiving the timing offset from the base station.
6. The method of claim 1 , wherein:
the DCI format does not schedule a resource for the UE.
7. The method of claim 1 , wherein:
the timing offset is broadcasted by the base station.
8. The method of claim 1 , wherein:
the DCI format is for slot format indication.
9. The method of claim 1 , wherein:
the applying the timing offset causes the UE to not apply the timing offset to one or more past uplink (UL) slots indicated by the DCI format.
10. The method of claim 1 , wherein:
the DCI format is for bandwidth part (BWP) switch.
11. A method of a User Equipment (UE), comprising:
receiving a Downlink Control Information (DCI) format from a base station, wherein the DCI format is indicative of slot formats;
applying at least some of the slot formats for at least one of downlink (DL) transmission or DL slots; and
upon determining that a timing advance (TA) value of the UE is larger than a threshold TA value:
not applying the slot formats for uplink (UL) transmission; and
not applying the slot formats for UL slots.
12. The method of claim 11 , wherein:
at least one of the not applying the slot formats for UL transmission or the not applying the slot formats for UL slots cause the UE to not apply the slot formats to one or more past UL slots.
13. A method of a base station, comprising:
determining, based upon a timing advance (TA) value of a User Equipment (UE), whether or not to configure the UE to monitor a Downlink Control Information (DCI) format 2_0; and
based upon the determining, configuring or not configuring the UE to monitor the DCI format 2_0, wherein when the TA value of the UE is smaller than a threshold TA value, the UE is configured to monitor the DCI format 2_0.
14. The method of claim 13 , wherein:
the DCI format 2_0 is indicative of slot formats.
15. The method of claim 13 , wherein when the TA value of the UE is larger than the threshold TA value,
the UE is not configured to monitor the DCI format 2_0.
16. The method of claim 13 , wherein when the TA value of the UE is larger than the threshold TA value,
the base station is prohibited from configuring the UE to monitor a DCI format 2_0.
17. The method of claim 13 , wherein the determining whether or not to configure the UE to monitor a DCI format 2_0 is based upon whether or not at least one of the base station or the UE operate in a non-terrestrial network (NTN), the method comprising:
not configuring the UE to monitor a DCI format 2_0 based upon at least one of the base station or the UE operating in a NTN.