Techniques for radio access technology coexistence in sidelink channels
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive one or more signals associated with a sidelink channel to perform sensing of the sidelink channel. The UE may transmit a control signal associated with a first radio access technology (RAT) to reserve a set of resources associated with a resource pool for the sidelink channel based at least in part on the sensing of the sidelink channel, wherein at least one of the set of resources or the resource pool is associated with a second RAT. The UE may transmit, using one or more resources from the set of resources, a first sidelink message, wherein the first sidelink message is associated with the second RAT. Numerous other aspects are described.
1 . A method of wireless communication performed by a user equipment (UE), comprising:
receiving one or more signals associated with a sidelink channel to perform sensing of the sidelink channel;
transmitting a control signal associated with a first radio access technology (RAT) to reserve a set of resources associated with a resource pool for the sidelink channel based at least in part on the sensing of the sidelink channel, wherein at least one of the set of resources or the resource pool is associated with a second RAT, and wherein the control signal indicates a time domain resource allocation associated with the set of resources, and wherein the time domain resource allocation indicates a time gap between a slot used for transmission of the control signal and a slot reserved for the set of resources; and
transmitting, using one or more resources from the set of resources, a first sidelink message, wherein the first sidelink message is associated with the second RAT.
2 . The method of claim 1 , further comprising:
transmitting a second sidelink message associated with the second RAT, wherein the second sidelink message uses first time domain resources that at least partially overlap with second time domain resources used for the transmission of the control signal.
3 . The method of claim 2 , wherein transmitting the second sidelink message associated with the second RAT comprises:
allocating a subset of frequency domain resources, from a set of frequency domain resources associated with the second sidelink message, for the control signal;
performing rate matching to allocate information associated with the second sidelink message to remaining frequency domain resources from the set of frequency domain resources;
transmitting the control signal, associated with the first RAT, using the subset of frequency domain resources; and
transmitting the second sidelink message, associated with the second RAT, using the remaining frequency domain resources.
4 . The method of claim 1 , wherein the control signal indicates at least one of:
an identifier associated with the UE,
a time domain resource allocation associated with the set of resources,
a frequency domain resource allocation associated with the set of resources, or
a reservation periodicity.
5 . The method of claim 1 , wherein the control signal indicates a Layer 1 identifier, and wherein the Layer 1 identifier is common for all UEs associated with the second RAT.
6 . The method of claim 1 , wherein the control signal indicates a frequency domain resource allocation associated with the set of resources, and wherein the frequency domain resource allocation indicates a number of subchannels associated with the set of resources and a starting subchannel for retransmissions associated with the set of resources.
7 . The method of claim 6 , wherein the control signal is transmitted with a second sidelink message associated with the second RAT, and wherein the number of subchannels is based at least in part on a number of subchannels allocated for the second sidelink message.
8 . The method of claim 1 , wherein transmitting the control signal associated with the first RAT comprises:
transmitting the control signal using a subset of frequency domain resources from the resource pool.
9 . The method of claim 1 , wherein the transmission of the control signal is based at least in part on one or more rules being satisfied.
10 . The method of claim 1 , the transmission of the control signal is based at least in part on at least one of:
a time gap between the control signal and a previous control signal, or
a trigger event occurring.
11 . The method of claim 1 , wherein transmitting the control signal associated with the first RAT comprises:
measuring a link measurement value; and
transmitting the control signal based at least in part on the link measurement value satisfying a threshold.
12 . The method of claim 1 , wherein transmitting the control signal associated with the first RAT comprises:
estimating a penetration rate, for the sidelink channel, associated with the second RAT; and
transmitting the control signal based at least in part on the penetration rate satisfying a threshold.
13 . The method of claim 1 , wherein transmitting the control signal associated with the first RAT comprises:
detecting a number of UEs in an area located proximate to the UE; and
transmitting the control signal based at least in part on the number of UEs satisfying a threshold.
14 . A user equipment (UE) for wireless communication, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to:
receive one or more signals associated with a sidelink channel to perform sensing of the sidelink channel;
transmit a control signal associated with a first radio access technology (RAT) to reserve a set of resources associated with a resource pool for the sidelink channel based at least in part on the sensing of the sidelink channel, wherein at least one of the set of resources or the resource pool is associated with a second RAT, and wherein the control signal indicates a time domain resource allocation associated with the set of resources, and wherein the time domain resource allocation indicates a time gap between a slot used for transmission of the control signal and a slot reserved for the set of resources; and
transmit, using one or more resources from the set of resources, a first sidelink message, wherein the first sidelink message is associated with the second RAT.
15 . The UE of claim 14 , wherein the one or more processors are further configured to:
transmit a second sidelink message associated with the second RAT, wherein the second sidelink message uses first time domain resources that at least partially overlap with second time domain resources used for the transmission of the control signal.
16 . The UE of claim 15 , wherein the one or more processors, to transmit the second sidelink message associated with the second RAT, are configured to:
allocate a subset of frequency domain resources, from a set of frequency domain resources associated with the second sidelink message, for the control signal;
perform rate matching to allocate information associated with the second sidelink message to remaining frequency domain resources from the set of frequency domain resources;
transmit the control signal, associated with the first RAT, using the subset of frequency domain resources; and
transmit the second sidelink message, associated with the second RAT, using the remaining frequency domain resources.
17 . The UE of claim 14 , wherein the control signal indicates at least one of:
an identifier associated with the UE,
a time domain resource allocation associated with the set of resources,
a frequency domain resource allocation associated with the set of resources, or
a reservation periodicity.
18 . The UE of claim 14 , wherein the control signal indicates a Layer 1 identifier, and wherein the Layer 1 identifier is common for all UEs associated with the second RAT.
19 . The UE of claim 14 , wherein the control signal indicates a frequency domain resource allocation associated with the set of resources, and wherein the frequency domain resource allocation indicates a number of subchannels associated with the set of resources and a starting subchannel for retransmissions associated with the set of resources.
20 . The UE of claim 19 , wherein the control signal is transmitted with a second sidelink message associated with the second RAT, and wherein the number of subchannels is based at least in part on a number of subchannels allocated for the second sidelink message.
21 . The UE of claim 14 , wherein the one or more processors, to transmit the control signal associated with the first RAT, are configured to:
transmit the control signal using a subset of frequency domain resources from the resource pool.
22 . The UE of claim 14 , wherein the transmission of the control signal is based at least in part on one or more rules being satisfied.
23 . The UE of claim 14 , the transmission of the control signal is based at least in part on at least one of:
a time gap between the control signal and a previous control signal, or
a trigger event occurring.
24 . The UE of claim 14 , wherein the one or more processors, to transmit the control signal associated with the first RAT, are configured to:
measure a link measurement value; and
transmit the control signal based at least in part on the link measurement value satisfying a threshold.
25 . The UE of claim 14 , wherein the one or more processors, to transmit the control signal associated with the first RAT, are configured to:
estimate a penetration rate, for the sidelink channel, associated with the second RAT; and
transmit the control signal based at least in part on the penetration rate satisfying a threshold.
26 . The UE of claim 14 , wherein the one or more processors, to transmit the control signal associated with the first RAT, are configured to:
detect a number of UEs in an area located proximate to the UE; and
transmit the control signal based at least in part on the number of UEs satisfying a threshold.
27 . A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:
one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:
receive one or more signals associated with a sidelink channel to perform sensing of the sidelink channel
transmit a control signal associated with a first radio access technology (RAT) to reserve a set of resources associated with a resource pool for the sidelink channel based at least in part on the sensing of the sidelink channel, wherein at least one of the set of resources or the resource pool is associated with a second RAT, and wherein the control signal indicates a time domain resource allocation associated with the set of resources, and wherein the time domain resource allocation indicates a time gap between a slot used for transmission of the control signal and a slot reserved for the set of resources; and
transmit, using one or more resources from the set of resources, a first sidelink message, wherein the first sidelink message is associated with the second RAT.
28 . An apparatus for wireless communication, comprising:
means for receiving one or more signals associated with a sidelink channel to perform sensing of the sidelink channel;
means for transmitting a control signal associated with a first radio access technology (RAT) to reserve a set of resources associated with a resource pool for the sidelink channel based at least in part on the sensing of the sidelink channel, wherein at least one of the set of resources or the resource pool is associated with a second RAT, and wherein the control signal indicates a time domain resource allocation associated with the set of resources, and wherein the time domain resource allocation indicates a time gap between a slot used for transmission of the control signal and a slot reserved for the set of resources; and
means for transmitting, using one or more resources from the set of resources, a first sidelink message, wherein the first sidelink message is associated with the second RAT.
29 . The non-transitory computer-readable medium of claim 27 , wherein the control signal indicates a frequency domain resource allocation associated with the set of resources, and wherein the frequency domain resource allocation indicates a number of subchannels associated with the set of resources and a starting subchannel for retransmissions associated with the set of resources.
30 . The apparatus of claim 28 , wherein the control signal indicates a frequency domain resource allocation associated with the set of resources, and wherein the frequency domain resource allocation indicates a number of subchannels associated with the set of resources and a starting subchannel for retransmissions associated with the set of resources.