Sidelink transmissions using slot aggregation
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may transmit, to a second UE, a sidelink transmission that spans multiple aggregated slots, wherein a first symbol in a slot of the sidelink transmission enables a decoding of the sidelink transmission by the second UE. The first UE may receive, from the second UE, a response based at least in part on the sidelink transmission that spans the multiple aggregated slots. Numerous other aspects are described.
1 . An apparatus for wireless communication at a first user equipment (UE), comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
transmit, to a second UE, a sidelink transmission that spans multiple aggregated slots, wherein a first symbol in a slot of the sidelink transmission enables a decoding of the sidelink transmission by the second UE, and wherein a gap symbol between the multiple aggregated slots is replaced by a physical sidelink shared channel (PSSCH) symbol that includes redundancy information or unique information; and
receive, from the second UE, a response based at least in part on the sidelink transmission that spans the multiple aggregated slots, wherein the first UE is allowed to use slot aggregation based at least in part on a PSSCH bandwidth allocation size being greater than or equal to a bandwidth threshold.
2 . The apparatus of claim 1 , wherein the redundancy information enables the decoding of other symbols of the sidelink transmission that spans the multiple aggregated slots.
3 . The apparatus of claim 1 , wherein the first symbol is a duplicate of a proceeding symbol of the sidelink transmission that spans the multiple aggregated slots.
4 . The apparatus of claim 1 , wherein the unique information includes unique information in relation to other symbols of the sidelink transmission that spans the multiple aggregated slots.
5 . The apparatus of claim 1 , wherein the one or more processors are further configured to determine a content or a type of the first symbol based at least in part on a resource pool pre-configuration or a resource pool configuration.
6 . The apparatus of claim 1 , wherein the one or more processors are further configured to:
receive control signaling from the second UE, wherein the control signaling includes sidelink control information; and
determine information included in the first symbol based at least in part on the control signaling.
7 . The apparatus of claim 1 , wherein the one or more processors are further configured to determine information included in the first symbol based at least in part on an allocation size, wherein the allocation size corresponds to an entire resource pool bandwidth, or the allocation size corresponds to a portion of a resource pool bandwidth, wherein the allocation size comprises the PSSCH bandwidth allocation size.
8 . The apparatus of claim 1 , wherein the one or more processors are further configured to determine information included in the first symbol based at least in part on the multiple aggregated slots being consecutive in time.
9 . The apparatus of claim 1 , wherein the one or more processors are further configured to determine information included in the first symbol based at least in part on the multiple aggregated slots being non-consecutive in time.
10 . The apparatus of claim 1 , wherein transmitting the sidelink transmission that spans the multiple aggregated slots is based at least in part on an allocation size that is greater than or equal to the bandwidth threshold, wherein the allocation size comprises the PSSCH bandwidth allocation size.
11 . The apparatus of claim 1 , wherein transmitting the sidelink transmission that spans the multiple aggregated slots is based at least in part on an allocation size that spans an entire resource pool bandwidth, wherein the allocation size that spans the entire resource pool bandwidth comprises the PSSCH bandwidth allocation size.
12 . The apparatus of claim 1 , wherein the one or more processors are further configured to:
determine to allow or disallow sidelink transmissions that span multiple aggregated slots based at least in part on one or more of: a system congestion, a transmission cast type, a transmission priority, a pre-configuration, a configuration, or a channel access type.
13 . An apparatus for wireless communication at a second user equipment (UE), comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
receive, from a first UE, a sidelink transmission that spans multiple aggregated slots, wherein a first symbol in a slot of the sidelink transmission enables a decoding of the sidelink transmission by the second UE, and wherein a gap symbol between the multiple aggregated slots is replaced by a physical sidelink shared channel (PSSCH) symbol that includes redundancy information or unique information; and
transmit, to the first UE, a response based at least in part on the sidelink transmission that spans the multiple aggregated slots, wherein slot aggregation is allowed based at least in part on a PSSCH bandwidth allocation size being greater than or equal to a bandwidth threshold.
14 . The apparatus of claim 13 , wherein:
the redundancy information enables the decoding of other symbols of the sidelink transmission that spans the multiple aggregated slots;
the first symbol is a duplicate of a proceeding symbol of the sidelink transmission that spans the multiple aggregated slots; or
the unique information comprises unique information in relation to the other symbols of the sidelink transmission that spans the multiple aggregated slots.
15 . The apparatus of claim 13 , wherein information included in the first symbol is based at least in part on one or more of:
a resource pool pre-configuration or a resource pool configuration;
control signaling transmitted by the second UE, wherein the control signaling includes sidelink control information;
an allocation size, wherein the allocation size corresponds to an entire resource pool bandwidth, or the allocation size corresponds to a portion of a resource pool bandwidth, and wherein the allocation size comprises the PSSCH bandwidth allocation size; or
the multiple aggregated slots being consecutive in time or non-consecutive in time.
16 . A method of wireless communication performed by a first user equipment (UE), comprising:
transmitting, to a second UE, a sidelink transmission that spans multiple aggregated slots, wherein a first symbol in a slot of the sidelink transmission enables a decoding of the sidelink transmission by the second UE, and wherein a gap symbol between the multiple aggregated slots is replaced by a physical sidelink shared channel (PSSCH) symbol that includes redundancy information or unique information; and
receiving, from the second UE, a response based at least in part on the sidelink transmission that spans the multiple aggregated slots, wherein the first UE is allowed to use slot aggregation based at least in part on a PSSCH bandwidth allocation size being greater than or equal to a bandwidth threshold.
17 . The method of claim 16 , wherein the redundancy information enables the decoding of other symbols of the sidelink transmission that spans the multiple aggregated slots.
18 . The method of claim 16 , wherein the first symbol is a duplicate of a proceeding symbol of the sidelink transmission that spans the multiple aggregated slots.
19 . The method of claim 16 , wherein the unique information includes unique information in relation to other symbols of the sidelink transmission that spans the multiple aggregated slots.
20 . The method of claim 16 , further comprising:
determining a content or a type of the first symbol based at least in part on a resource pool pre-configuration or a resource pool configuration.
21 . The method of claim 16 , further comprising:
receiving control signaling from the second UE, wherein the control signaling includes sidelink control information; and
determining information included in the first symbol based at least in part on the control signaling.
22 . The method of claim 16 , further comprising:
determining information included in the first symbol based at least in part on an allocation size, wherein the allocation size corresponds to an entire resource pool bandwidth, or the allocation size corresponds to a portion of a resource pool bandwidth, wherein the allocation size comprises the PSSCH bandwidth allocation size.
23 . The method of claim 16 , further comprising:
determining information included in the first symbol based at least in part on the multiple aggregated slots being consecutive in time.
24 . The method of claim 16 , further comprising:
determining information included in the first symbol based at least in part on the multiple aggregated slots being non-consecutive in time.
25 . The method of claim 16 , wherein transmitting the sidelink transmission that spans the multiple aggregated slots is based at least in part on an allocation size that is greater than or equal to the bandwidth threshold, wherein the allocation size that is greater than or equal to the bandwidth threshold comprises the PSSCH bandwidth allocation size.
26 . The method of claim 16 , wherein transmitting the sidelink transmission that spans the multiple aggregated slots is based at least in part on an allocation size that spans an entire resource pool bandwidth, wherein the allocation size that spans the entire resource pool bandwidth comprises the PSSCH bandwidth allocation size.
27 . The method of claim 16 , further comprising:
determining to allow or disallow sidelink transmissions that span multiple aggregated slots based at least in part on one or more of: a system congestion, a transmission cast type, a transmission priority, a pre-configuration, a configuration, or a channel access type.
28 . A method of wireless communication performed by a second user equipment (UE), comprising:
receiving, from a first UE, a sidelink transmission that spans multiple aggregated slots, wherein a first symbol in a slot of the sidelink transmission enables a decoding of the sidelink transmission by the second UE, and wherein a gap symbol between the multiple aggregated slots is replaced by a physical sidelink shared channel (PSSCH) symbol that includes redundancy information or unique information; and
transmitting, to the first UE, a response based at least in part on the sidelink transmission that spans the multiple aggregated slots, wherein slot aggregation is allowed based at least in part on a PSSCH bandwidth allocation size being greater than or equal to a bandwidth threshold.
29 . The method of claim 28 , wherein:
the redundancy information enables the decoding of other symbols of the sidelink transmission that spans the multiple aggregated slots;
the first symbol is a duplicate of a proceeding symbol of the sidelink transmission that spans the multiple aggregated slots; or
the unique information includes unique information in relation to the other symbols of the sidelink transmission that spans the multiple aggregated slots.
30 . The method of claim 28 , wherein information included in the first symbol is based at least in part on one or more of:
a resource pool pre-configuration or a resource pool configuration;
control signaling transmitted by the second UE, wherein the control signaling includes sidelink control information;
an allocation size, wherein the allocation size corresponds to an entire resource pool bandwidth, or the allocation size corresponds to a portion of a resource pool bandwidth, wherein the allocation size comprises the PSSCH bandwidth allocation size; or
the multiple aggregated slots being consecutive in time or non-consecutive in time.