Performing channel occupancy time sensing
Apparatuses, methods, and systems are disclosed for performing channel occupancy time sensing. One method includes receiving information configuring a single channel occupancy time for multi-beam transmission in an unlicensed channel. The method includes performing sensing for the single channel occupancy time. The sensing includes: omni-directional sensing at a beginning of the single channel occupancy time; directional sensing on a plurality of beams at the beginning of the single channel occupancy time; directional sensing on the plurality of beams in a time domain multiplexing manner before each transmission based on a time gap between transmissions; or some combination thereof.
1. A method at a user equipment (UE), the method comprising:
receiving information configuring a single channel occupancy time (COT) for multi-beam transmission in an unlicensed channel; and
performing sensing for the single COT, wherein the sensing comprises:
omni-directional sensing at a beginning of the single COT;
directional sensing on a plurality of beams at the beginning of the single COT;
directional sensing on the plurality of beams in a time domain multiplexing manner before each transmission based on a time gap between transmissions;
or a combination thereof.
2. The method of claim 1 , wherein the single COT is applied for multi-beam transmissions, and the multi-beam transmissions comprise:
spatial division multiplexing;
time division multiplexing;
or a combination thereof.
3. The method of claim 1 , wherein the omni-directional sensing comprises:
sensing in a plurality of directions;
sensing on a wider beam than the transmission beams;
or a some combination thereof.
4. The method of claim 1 , further comprising transmitting a first transmission in the single COT using a first beam in response to a first successful clear channel assessment (CCA) for the first beam.
5. The method of claim 4 , further comprising transmitting a second transmission in the single COT in response to:
the second transmission being configured for transmission; and
a gap between an end of the first transmission and a start of the second transmission being less than a threshold gap value.
6. The method of claim 5 , wherein the second transmission is configured for transmission on the first beam, and the threshold gap value corresponds to transmission on the same beam.
7. The method of claim 5 , wherein the second transmission is configured for transmission on a second beam, and the threshold gap value corresponds to transmission on different beams.
8. The method of claim 1 , wherein the sensing comprises directional sensing on the plurality of beams in the time domain multiplexing manner before each transmission, and the directional sensing on the plurality of beams before each of the corresponding transmissions comprises performing a clear channel assessment (CCA) on each beam of the plurality of beams before performing a transmission on that beam.
9. The method of claim 1 , wherein the sensing comprises directional sensing on the plurality of beams at the beginning of the single COT, and the directional sensing on the plurality of beams at the beginning of the single COT comprises performing a clear channel assessment (CCA) on multiple beams of the plurality of beams before initiating the single COT, and initiating the single COT in response to at least one beam of the multiple beams having a successful CCA.
10. The method of claim 9 , wherein transmission is enabled only for beams of the multiple beams having the successful CCA.
11. The method of claim 1 , wherein the sensing comprises omni-directional sensing at a beginning of the single COT, and the omni-directional sensing at a beginning of the single COT comprises performing an omni-directional clear channel assessment (CCA) before initiating the single COT, and initiating the single COT in response to the omni-directional CCA being successful.
12. The method in claim 11 , further comprising performing additional sensing in the single COT before a transmission in response to the time gap between the transmission and a previous transmission is above a threshold time gap.
13. An apparatus for wireless communication, the apparatus comprising:
a processor; and
a memory coupled to the processor, the memory comprising instructions executable by the processor to cause the apparatus to:
receive information configuring a single channel occupancy time (COT) for multi-beam transmission in an unlicensed channel; and
perform sensing for the single COT, wherein the sensing comprises:
omni-directional sensing at a beginning of the single COT;
directional sensing on a plurality of beams at the beginning of the single COT;
directional sensing on the plurality of beams in a time domain multiplexing manner before each transmission based on a time gap between transmissions;
or a combination thereof.
14. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to transmit a first transmission in the single COT using a first beam in response to a first successful clear channel assessment (CCA) for the first beam.
15. The apparatus of claim 14 , wherein the instructions are further executable by the processor to cause the apparatus to transmit a second transmission in the single COT in response to:
the second transmission being configured for transmission; and
a gap between an end of the first transmission and a start of the second transmission being less than a threshold gap value.
16. The apparatus of claim 15 , wherein the second transmission is configured for transmission on the first beam, and the threshold gap value corresponds to transmission on the same beam.
17. The apparatus of claim 15 , wherein the second transmission is configured for transmission on a second beam, and the threshold gap value corresponds to transmission on different beams.
18. The apparatus of claim 13 , wherein the single COT is applied for multi-beam transmissions, and the multi-beam transmissions comprise:
spatial division multiplexing;
time division multiplexing;
or a combination thereof.
19. The apparatus of claim 13 , wherein the omni-directional sensing comprises:
sensing in a plurality of directions;
sensing on a wider beam than the transmission beams;
or a combination thereof.
20. The apparatus of claim 13 , wherein the sensing comprises directional sensing on the plurality of beams in the time domain multiplexing manner before each transmission, and the directional sensing on the plurality of beams before each of the corresponding transmissions comprises performing a clear channel assessment (CCA) on each beam of the plurality of beams before performing a transmission on that beam.