Contention window determination
A wireless device determines a reference duration for contention window adjustment, wherein the reference duration is from a beginning of a channel occupancy and until an end of a first slot where at least one physical uplink shared channel (PUSCH) is transmitted. The wireless device performs a listen before talk (LBT) procedure with a contention window value associated with the reference duration. The wireless device transmits at least one uplink signal after the LBT procedure indicates a clear channel.
1. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
determine a reference duration for contention window adjustment, wherein the reference duration is from a beginning of a channel occupancy and until an end of a plurality of first slots where at least one physical uplink shared channel (PUSCH) is transmitted, wherein each slot of the plurality of first slots comprises a plurality of symbols;
determine a contention window value based on one or more new data indicators (NDIs) of at least one uplink signal transmitted during the reference duration;
perform a listen before talk (LBT) procedure with the contention window value associated with the reference duration; and
transmit the at least one uplink signal after the LBT procedure indicates a clear channel.
2. The wireless device of claim 1 , wherein the beginning of the channel occupancy is a beginning of a channel occupancy of a first transmission burst.
3. The wireless device of claim 1 , wherein the beginning of the channel occupancy is based on when a first LBT procedure indicates that the clear channel.
4. The wireless device of claim 1 , wherein the instructions further cause the wireless device to adjust a contention window based on the contention window value.
5. The wireless device of claim 1 , wherein the reference duration comprises multiple contiguous slots from a beginning of a transmission burst or a channel occupancy time.
6. The wireless device of claim 1 , wherein the instructions further cause the wireless device to receive one or more messages comprising configuration parameters of a cell, wherein a length of the reference duration is based on a numerology of the cell.
7. The wireless device of claim 1 , wherein the one or more NDIs indicate:
one or more positive acknowledgements (ACKs); or
one or more negative acknowledgments (NACKs).
8. A base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the base station to:
determine a reference duration for contention window adjustment, wherein the reference duration is from a beginning of a channel occupancy and until an end of a plurality of first slots where at least one physical uplink shared channel (PUSCH) is transmitted, wherein each slot of the plurality of first slots comprises a plurality of symbols;
determine a contention window value based on one or more new data indicators (NDIs) of at least one uplink signal transmitted during the reference duration;
perform a listen before talk (LBT) procedure with the contention window value associated with the reference duration; and
transmit the at least one uplink signal after the LBT procedure indicates a clear channel.
9. The base station of claim 8 , wherein the beginning of the channel occupancy is a beginning of a channel occupancy of a first transmission burst.
10. The base station of claim 8 , wherein the beginning of the channel occupancy is based on when a first LBT procedure indicates that the clear channel.
11. The base station of claim 8 , wherein the instructions further cause the base station to adjust a contention window based on the contention window value.
12. The base station of claim 8 , wherein the reference duration comprises multiple contiguous slots from a beginning of a transmission burst or a channel occupancy time.
13. The base station of claim 8 , wherein the instructions further cause the base station to receive one or more messages comprising configuration parameters of a cell, wherein a length of the reference duration is based on a numerology of the cell.
14. The base station of claim 8 , wherein the one or more NDIs indicate:
one or more positive acknowledgements (ACKs); or
one or more negative acknowledgments (NACKs).
15. A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a device, cause the device to:
determine a reference duration for contention window adjustment, wherein the reference duration is from a beginning of a channel occupancy and until an end of a plurality of first slots where at least one physical uplink shared channel (PUSCH) is transmitted, wherein each slot of the plurality of first slots comprises a plurality of symbols;
determine a contention window value based on one or more new data indicators (NDIs) of at least one uplink signal transmitted during the reference duration;
perform a listen before talk (LBT) procedure with the contention window value associated with the reference duration; and
transmit the at least one uplink signal after the LBT procedure indicates a clear channel.
16. The non-transitory computer-readable medium of claim 15 , wherein the beginning of the channel occupancy is a beginning of a channel occupancy of a first transmission burst.
17. The non-transitory computer-readable medium of claim 15 , wherein the beginning of the channel occupancy is based on when a first LBT procedure indicates that the clear channel.
18. The non-transitory computer-readable medium of claim 15 , wherein the instructions further cause the device to adjust a contention window based on the contention window value.
19. The non-transitory computer-readable medium of claim 15 , wherein the reference duration comprises multiple contiguous slots from a beginning of a transmission burst or a channel occupancy time.
20. The non-transitory computer-readable medium of claim 15 , wherein the instructions further cause the device to receive one or more messages comprising configuration parameters of a cell, wherein a length of the reference duration is based on a numerology of the cell.