Sidelink channel occupancy time sharing in shared spectrum
A first wireless device receives, from a second wireless device and via a first time slot of a channel occupancy time (COT), a first sidelink transmission indicating COT sharing information of the COT. The first wireless device receives, from a third wireless device and via a second time slot of the COT, a second sidelink transmission indicating the COT sharing information of the COT. The first wireless device transmits, via a third time slot of the COT and in response to both the first sidelink transmission and the second sidelink transmission indicating the COT sharing information, a third sidelink transmission. Transmitting the third sidelink transmission is based on a first distance between the first wireless device and the second wireless device, and a second distance between the first wireless device and the third wireless device.
1 . A method comprising:
receiving, by a first wireless device from a second wireless device and via a first time slot of a channel occupancy time (COT), a first sidelink transmission indicating COT sharing information of the COT;
receiving, from a third wireless device and via a second time slot of the COT, a second sidelink transmission indicating the COT sharing information of the COT; and
transmitting, via a third time slot of the COT and in response to both the first sidelink transmission and the second sidelink transmission indicating the COT sharing information, a third sidelink transmission, based on:
a first distance between the first wireless device and the second wireless device; and
a second distance between the first wireless device and the third wireless device.
2 . The method of claim 1 , further comprising receiving, from a base station, a message indicating one or more distance thresholds for COT sharing in a resource pool, wherein the transmitting is further based on the one or more distance thresholds.
3 . The method of claim 2 , wherein the message comprises at least one of:
a radio resource control (RRC) message;
a medium access control control element (MAC CE); or
downlink control information (DCI).
4 . The method of claim 1 , wherein the COT sharing information comprises at least one of:
an identifier (ID) of the COT;
a start time of the COT; or
a length of the COT in units of time slots.
5 . The method of claim 1 , wherein the transmitting is further based on a comparison between at least one of the first distance or the second distance and one or more distance thresholds.
6 . The method of claim 1 , wherein the transmitting is further based on:
the first sidelink transmission comprising an identification of the COT; and
the second sidelink transmission comprising the identification of the COT.
7 . The method of claim 1 , wherein the first time slot, the second time slot, and the third time slot are consecutive time slots in time domain.
8 . The method of claim 1 , wherein the transmitting comprises transmitting the third sidelink transmission based on a Type 2 channel access procedure.
9 . A first wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the first wireless device to:
receive, from a second wireless device and via a first time slot of a channel occupancy time (COT), a first sidelink transmission indicating COT sharing information of the COT;
receive, from a third wireless device and via a second time slot of the COT, a second sidelink transmission indicating the COT sharing information of the COT; and
transmit, via a third time slot of the COT and in response to both the first sidelink transmission and the second sidelink transmission indicating the COT sharing information, a third sidelink transmission, based on:
a first distance between the first wireless device and the second wireless device; and
a second distance between the first wireless device and the third wireless device.
10 . The first wireless device of claim 9 , wherein the instructions further cause the first wireless device to receive, from a base station, a message indicating one or more distance thresholds for COT sharing in a resource pool, wherein transmitting the third sidelink transmission is further based on the one or more distance thresholds.
11 . The first wireless device of claim 10 , wherein the message comprises at least one of:
a radio resource control (RRC) message;
a medium access control control element (MAC CE); or
downlink control information (DCI).
12 . The first wireless device of claim 9 , wherein the COT sharing information comprises at least one of:
an identifier (ID) of the COT;
a start time of the COT; or
a length of the COT in units of time slots.
13 . The first wireless device of claim 9 , wherein transmitting the third sidelink transmission is further based on a comparison between at least one of the first distance or the second distance and one or more distance thresholds.
14 . The first wireless device of claim 9 , wherein transmitting the third sidelink transmission is further based on:
the first sidelink transmission comprising an identification of the COT; and
the second sidelink transmission comprising the identification of the COT.
15 . The first wireless device of claim 9 , wherein the first time slot, the second time slot, and the third time slot are consecutive time slots in time domain.
16 . The first wireless device of claim 9 , wherein the instructions further cause the first wireless device to transmit the third sidelink transmission based on a Type 2 channel access procedure.
17 . A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a first wireless device, cause the first wireless device to:
receive, from a second wireless device and via a first time slot of a channel occupancy time (COT), a first sidelink transmission indicating COT sharing information of the COT;
receive, from a third wireless device and via a second time slot of the COT, a second sidelink transmission indicating the COT sharing information of the COT; and
transmit, via a third time slot of the COT and in response to both the first sidelink transmission and the second sidelink transmission indicating the COT sharing information, a third sidelink transmission, based on:
a first distance between the first wireless device and the second wireless device; and
a second distance between the first wireless device and the third wireless device.
18 . The non-transitory computer-readable medium of claim 17 , wherein the instructions further cause the first wireless device to receive, from a base station, a message indicating one or more distance thresholds for COT sharing in a resource pool, wherein transmitting the third sidelink transmission is further based on the one or more distance thresholds.
19 . The non-transitory computer-readable medium of claim 18 , wherein the message comprises at least one of:
a radio resource control (RRC) message;
a medium access control control element (MAC CE); or
downlink control information (DCI).
20 . The non-transitory computer-readable medium of claim 17 , wherein the COT sharing information comprises at least one of:
an identifier (ID) of the COT;
a start time of the COT; or
a length of the COT in units of time slots.