Decoupled mini-slot sidelink control information (SCI) for scheduling and resource reservation
A method of wireless communication, by a user equipment (UE), includes selecting a resource from a dedicated physical sidelink control channel (PSCCH) resource pool that has multiple potential PSCCH time domain resources with a mini-slot structure. The method also includes transmitting a mini-slot first stage sidelink control information (SCI-1) message on the selected resource. The mini-slot SCI-1 message is decoupled from a physical sidelink shared channel (PSSCH) associated with a data resource pool.
1 . A method of wireless communication, by a user equipment (UE), comprising:
selecting a resource from a dedicated physical sidelink control channel (PSCCH) resource pool having a first plurality of potential PSCCH time domain resources with a mini-slot structure, wherein the dedicated PSCCH resource pool is in a first component carrier (CC) different from a second CC of the data resource pool; and
transmitting a mini-slot first stage sidelink control information (SCI-1) message on the selected resource, the mini-slot SCI-1 message decoupled from a physical sidelink shared channel (PSSCH) associated with a data resource pool.
2 . The method of claim 1 , in which the dedicated PSCCH resource pool comprises a second plurality of potential PSCCH time domain resources in a second frequency domain different from a first frequency domain of the first plurality of potential PSCCH time domain resources.
3 . The method of claim 1 , in which the mini-slot SCI-1 message is in a first slot and the PSSCH is in a second slot, different from the first slot.
4 . The method of claim 3 , further comprising:
sensing in the first slot for the mini-slot SCI-1 message; and
sensing in the second slot for a legacy SCI-1 message.
5 . The method of claim 3 , further comprising receiving an indication of an offset between the first slot and the second slot.
6 . The method of claim 1 , in which the dedicated PSCCH resource pool is frequency division multiplexed with the data resource pool.
7 . The method of claim 1 , in which the dedicated PSCCH resource pool is time division multiplexed with the data resource pool.
8 . The method of claim 1 , in which each mini-slot in the dedicated PSCCH resource pool maps to a different subchannel in the data resource pool.
9 . The method of claim 1 , in which the mini-slot SCI-1 message includes a field for at least one of a layer one (L1) source identifier (ID), a L1 destination ID, a transmission configuration indicator (TCI state), or a slot offset value (K0).
10 . The method of claim 1 , further comprising transmitting a repeated resource reservation SCI-1 message in a subsequent selected resource of the dedicated PSCCH resource pool.
11 . The method of claim 1 , in which a resource reservation resource allocation within the mini-slot SCI-1 message is with respect to a first scheduled PSSCH slot of the data resource pool.
12 . The method of claim 1 , further comprising performing channel sensing based on another mini-slot SCI-1 message of the dedicated PSCCH resource pool, which is received from a first transmitter.
13 . The method of claim 12 , further comprising performing second stage channel sensing based on a legacy SCI-1 message of the data resource pool, the legacy SCI-1 message received from a second transmitter.
14 . An apparatus for wireless communication, by a user equipment (UE), comprising:
a memory; and
at least one processor coupled to the memory, the at least one processor configured:
to select a resource from a dedicated physical sidelink control channel (PSCCH) resource pool having a first plurality of potential PSCCH time domain resources with a mini-slot structure, wherein the dedicated PSCCH resource pool is in a first component carrier (CC) different from a second CC of the data resource pool; and
to transmit a mini-slot first stage sidelink control information (SCI-1) message on the selected resource, the mini-slot SCI-1 message decoupled from a physical sidelink shared channel (PSSCH) associated with a data resource pool.
15 . The apparatus of claim 14 , in which the dedicated PSCCH resource pool comprises a second plurality of potential PSCCH time domain resources in a second frequency domain different from a first frequency domain of the first plurality of potential PSCCH time domain resources.
16 . The apparatus of claim 14 , in which the mini-slot SCI-1 message is in a first slot and the PSSCH is in a second slot, different from the first slot.
17 . The apparatus of claim 16 , in which the at least one processor is further configured:
to sense in the first slot for the mini-slot SCI-1 message; and
to sense in the second slot for a legacy SCI-1 message.
18 . The apparatus of claim 16 , in which the at least one processor is further configured to receive an indication of an offset between the first slot and the second slot.
19 . The apparatus of claim 14 , in which the dedicated PSCCH resource pool is frequency division multiplexed with the data resource pool.
20 . The apparatus of claim 14 , in which the dedicated PSCCH resource pool is time division multiplexed with the data resource pool.
21 . The apparatus of claim 14 , in which each mini-slot in the dedicated PSCCH resource pool maps to a different subchannel in the data resource pool.
22 . The apparatus of claim 14 , in which the mini-slot SCI-1 message includes a field for at least one of a layer one (L1) source identifier (ID), a L1 destination ID, a transmission configuration indicator (TCI state), or a slot offset value (K0).
23 . The apparatus of claim 14 , in which the at least one processor is further configured to transmit a repeated resource reservation SCI-1 message in a subsequent selected resource of the dedicated PSCCH resource pool.
24 . The apparatus of claim 14 , in which a resource reservation resource allocation within the mini-slot SCI-1 message is with respect to a first scheduled PSSCH slot of the data resource pool.
25 . The apparatus of claim 14 , in which the at least one processor is further configured to perform channel sensing based on another mini-slot SCI-1 message of the dedicated PSCCH resource pool, which is received from a first transmitter.
26 . The apparatus of claim 25 , in which the at least one processor is further configured to perform second stage channel sensing based on a legacy SCI-1 message of the data resource pool, the legacy SCI-1 message received from a second transmitter.
27 . An apparatus for wireless communication, by a user equipment (UE), comprising:
means for selecting a resource from a dedicated physical sidelink control channel (PSCCH) resource pool having a first plurality of potential PSCCH time domain resources with a mini-slot structure, wherein the dedicated PSCCH resource pool is in a first component carrier (CC) different from a second CC of the data resource pool; and
means for transmitting a mini-slot first stage sidelink control information (SCI-1) message on the selected resource, the mini-slot SCI-1 message decoupled from a physical sidelink shared channel (PSSCH) associated with a data resource pool.
28 . The apparatus of claim 27 , in which the dedicated PSCCH resource pool comprises a second plurality of potential PSCCH time domain resources in a second frequency domain different from a first frequency domain of the first plurality of potential PSCCH time domain resources.