Multi-slot scheduling on unlicensed spectrum
Methods and apparatuses for multi-slot scheduling on unlicensed spectrum are disclosed. A method comprises: receiving a downlink control information (DCI) for scheduling time-contiguous data transmission in multiple slots, wherein the DCI includes an indicator indicating the time domain resource allocation in the multiple slots; determining, based on the indicator, a starting position and an ending position of the scheduled time-contiguous data transmission; and transmitting, in response to a successful listen-before-talk (LBT), data from the determined starting position to the determined ending position.
1. A method performed by a user equipment (UE), the method comprising:
receiving a downlink control information (DCI) for scheduling time-contiguous data transmission in multiple slots, wherein the downlink control information includes an indicator indicating the time domain resource allocation in the multiple slots;
determining, based on the indicator, a starting position and a length of the scheduled time-contiguous data transmission, wherein:
the indicator:
explicitly indicates three of: a starting symbol, a starting slot, an ending symbol, an ending slot, and a length of the scheduled time-contiguous data transmission in a first slot of the multiple slots; and
implicitly indicates:
the length of the scheduled time-contiguous data transmission in each of a number of slots of the multiple slots, the number of slots comprising slots between the starting slot and the ending slot; and
at least one of the following not explicitly indicated by the indicator: the starting symbol, the starting slot, the ending symbol, and the ending slot; and
transmitting, in response to a successful listen-before-talk, data from the determined starting position to the determined ending position.
2. The method of claim 1 , wherein the indicator indicates the starting symbol in a first slot of the multiple slots.
3. The method of claim 2 , wherein the starting symbol in the first slot is chosen from a set of possible starting symbols configured by radio resource control signaling, or from a set of possible starting symbols of physical uplink shared channel mapping type B, or is fixed to symbol 0.
4. The method of claim 1 , wherein the indicator indicates the ending symbol of a last slot of the multiple slots.
5. The method of claim 4 , wherein the ending symbol of the last slot is chosen from a set of possible ending symbols configured by radio resource control signaling, or from a set of possible ending symbols of physical uplink shared channel mapping type B.
6. The method of claim 1 , wherein the indicator indicates the number of the multiple slots, the number of full slots, or a duration of the scheduled symbols in the multiple slots.
7. The method of claim 1 , wherein the indicator indicates a starting symbol index in a first slot of the multiple slots and a difference between the starting symbol index and an ending symbol index of a last slot of the multiple slots.
8. The method of claim 1 , wherein the indicator indicates a starting symbol index in a first slot of the multiple slots and a duration in a number of symbols in a last slot of the multiple slots.
9. The method of claim 1 , wherein the indicator includes separate indications of physical uplink shared channel mapping types for a first slot, a last slot and middle slot(s) of the multiple slots.
10. The method of claim 9 , wherein the physical uplink shared channel mapping types for the first slot, the last slot and the middle slot(s) of the multiple slots are implicitly determined.
11. A method performed by a base station, the method comprising:
transmitting a downlink control information (DCI) to a remote unit for scheduling time-contiguous data transmission in multiple slots, wherein the downlink control information includes an indicator indicating time domain resource allocation in the multiple slots, wherein:
the indicator:
explicitly indicates three of: a starting symbol, a starting slot, an ending symbol, an ending slot, and a length of the scheduled time-contiguous data transmission in a first slot of the multiple slots; and
implicitly indicates:
the length of the scheduled time-contiguous data transmission in each of a number of slots of the multiple slots, the number of slots comprising slots between the starting slot and the ending slot; and
at least one of the following not explicitly indicated by the indicator: the starting symbol, the starting slot, the ending symbol, and the ending slot; and
receiving, from the remote unit subjected to a successful listen-before-talk, data from a starting position to an ending position determined from the indicated time domain resource allocation in the multiple slots.
12. The method of claim 11 , wherein the indicator indicates the starting symbol in a first slot of the multiple slots.
13. The method of claim 12 , wherein the starting symbol in the first slot is chosen from a set of possible starting symbols configured by radio resource control signaling, or from a set of possible starting symbols of physical uplink shared channel mapping type B, or is fixed to symbol 0.
14. The method of claim 11 , wherein the indicator indicates the ending symbol of a last slot of the multiple slots.
15. The method of claim 14 , wherein the ending symbol of the last slot is chosen from a set of possible ending symbols configured by radio resource control signaling, or from a set of possible ending symbols of physical uplink shared channel mapping type B.
16. The method of claim 11 , wherein the indicator indicates the number of the multiple slots, the number of full slots, or a duration of the scheduled symbols in the multiple slots.
17. The method of claim 11 , wherein the indicator indicates a starting symbol index in a first slot of the multiple slots and a difference between the starting symbol index and an ending symbol index of a last slot of the multiple slots.
18. The method of claim 11 , wherein the indicator indicates a starting symbol index in a first slot of the multiple slots and a duration in a number of symbols in a last slot of the multiple slots.
19. A user equipment (UE), comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the UE to:
receive a downlink control information (DCI) for scheduling time-contiguous data transmission in multiple slots, wherein the downlink control information includes an indicator indicating the time domain resource allocation in the multiple slots;
based on the indicator, determine a starting position and a length of the scheduled time-contiguous data transmission, wherein:
the indicator:
explicitly indicates three of: a starting symbol, a starting slot, an ending symbol, an ending slot, and a length of the scheduled time-contiguous data transmission in a first slot of the multiple slots; and
implicitly indicates:
the length of the scheduled time-contiguous data transmission in each of a number of slots of the multiple slots, the number of slots comprising slots between the starting slot and the ending slot; and
at least one of the following not explicitly indicated by the indicator: the starting symbol, the starting slot, the ending symbol, and the ending slot; and
in response to a successful listen-before-talk, transmit data from the determined starting position to the determined ending position.
20. A base station, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the base station to:
transmit a downlink control information (DCI) to a remote unit for scheduling time-contiguous data transmission in multiple slots, wherein the downlink control information includes an indicator indicating time domain resource allocation in the multiple slots, wherein:
the indicator:
explicitly indicates three of: a starting symbol, a starting slot, an ending symbol, an ending slot, and a length of the scheduled time-contiguous data transmission in a first slot of the multiple slots; and
implicitly indicates:
the length of the scheduled time-contiguous data transmission in each of a number of slots of the multiple slots, the number of slots comprising slots between the starting slot and the ending slot; and
at least one of the following not explicitly indicated by the indicator: the starting symbol, the starting slot, the ending symbol, and the ending slot; and
receive, from the remote unit subjected to a successful listen-before-talk, data from a starting position to an ending position determined from the indicated time domain resource allocation in the multiple slots.