Communications within a user equipment—initiated channel occupancy time
The present application relates to devices and components including apparatus, systems, and methods for sharing a user equipment—initiated channel occupancy time.
1 . A method of operating a base station, the method comprising:
processing information received from a first user equipment (UE), to indicate the first UE has acquired a channel for a channel occupancy time (COT);
obtaining a portion of the channel during the COT for transmitting signals having user plane data to, or receiving signals from, a second UE; and
generating, for transmission to the first UE, an indication that the portion of the channel within the COT is obtained.
2 . The method of claim 1 , further comprising:
obtaining the portion of the channel from the first UE after the first UE completes transmissions using the channel.
3 . The method of claim 1 , further comprising:
canceling transmissions from the first UE on the channel; and
obtaining the portion of the channel from the first UE based on canceling the transmissions from the first UE.
4 . The method of claim 3 , wherein canceling transmissions from the first UE comprises: transmitting downlink control information (DCI) with a cancellation indicator.
5 . The method of claim 3 , wherein canceling transmissions from the first UE comprises:
determining that transmissions from the first UE on the channel during the COT have not been canceled more than a predetermined threshold; and canceling the transmissions from the first UE based on said determining.
6 . The method of claim 1 , further comprising:
providing, to the second UE, an indication of a duration of the portion.
7 . The method of claim 6 , wherein providing the indication of the duration comprises:
generating downlink control information with an indicator to indicate the duration; or
generating information to schedule transmissions to or from the second UE with a length that corresponds to the duration.
8 . The method of claim 1 , wherein the portion is a subset of available resources of the channel in time, frequency, or space.
9 . The method of claim 1 , further comprising:
generating an indication of the portion to the second UE.
10 . The method of claim 1 , wherein the portion is a second portion and the method further comprises:
generating signals to be transmitted to, or processing signals received from, the first UE using a first portion of the channel during the COT, wherein the first portion and the second portion overlap in a time domain.
11 . The method of claim 1 , wherein the portion is to be used for:
generating any downlink signals to be transmitted to the second UE;
processing uplink control signaling received from the second UE and generating any downlink signals to be transmitted to the second UE; or
processing any uplink signals received from the second UE and generating any downlink signals to be transmitted to the second UE.
12 . The method of claim 1 , wherein: the portion is two symbols and a subcarrier spacing of the portion is 15 kHz; the portion is four symbols and a subcarrier spacing of the portion is 30 kHz; or the portion is eight symbols and a subcarrier spacing of the portion is 60 kHz.
13 . The method of claim 1 , further comprising:
configuring the first UE with an energy detection threshold; and
obtaining the portion of the channel based on a determination that the first UE performed a successful listen before talk (LBT) operation using the energy detection threshold.
14 . One or more non-transitory, computer-readable media having instructions that, when executed cause processing circuitry to:
perform a listen-before-talk (LBT) procedure to acquire a channel for a channel occupancy time (COT);
generate an indication, to be transmitted to a base station, that a user equipment (UE) acquired the channel for the COT; and
process an indication, received from the base station, that a portion of the channel within the COT is obtained.
15 . The one or more non-transitory, computer-readable media of claim 14 , wherein the portion is a first portion of the channel within the COT and the instructions, when executed, further cause the processing circuitry to:
process an indication of time or frequency resources of a second portion of the channel, received from the base station, within the COT that is available for transmissions by the UE.
16 . The one or more non-transitory, computer-readable media of claim 14 , wherein the instructions, when executed further cause the processing circuitry to:
process a cancellation indicator, received from the base station, to cancel an uplink transmission of the UE on the portion of the channel within the COT obtained.
17 . The one or more non-transitory, computer-readable media of claim 14 , wherein the instructions, when executed further cause the processing circuitry to:
process an indication, received from the base station, of an energy detection threshold;
perform the LBT procedure based on the energy detection threshold; and
generate an indication, to be transmitted to the base station, that the energy detection threshold was used to acquire the channel for the COT.
18 . An apparatus comprising:
processing circuitry, coupled with the memory, the processing circuitry to:
process by a user equipment (UE), an indication, received from a base station, that a portion of a channel acquired for a channel occupancy time (COT) by another UE is available to the UE; and
generate or process the user-plane data in the portion; and
interface circuitry coupled with the processing circuitry to enable communication.
19 . The apparatus of claim 18 , wherein the indication is an explicit indication in downlink control information (DCI) or is an implicit indication based on scheduling information received from the base station.
20 . The apparatus of claim 18 , wherein the processing circuitry is further to:
process an indication, received from the base station, of an energy detection threshold;
perform a listen-before-talk (LBT) procedure based on the energy detection threshold; and
generate user plane data in the portion based on the LBT procedure.