Slot format for low latency sidelink communications

A method for wireless communications at a second user equipment (UE), comprising:

• receiving, by the second UE, a first indication of a configuration of a sidelink resource pool for a group of UEs that includes a first UE and the second UE, wherein the sidelink resource pool comprises one or more slots in a time domain and one or more subchannels in a frequency domain, and wherein a slot of the sidelink resource pool comprises a control region allocated for a sidelink control channel and a set of contiguous subslots each allocated for a sidelink data channel;
• receiving, by the second UE, a second indication for the sidelink resource pool of a subslot pattern for the slot of the sidelink resource pool, the subslot pattern indicating a quantity of subslots within the slot and a length of each subslot of the quantity of subslots;
• receiving, by the second UE from the first UE in the control region of the slot, sidelink control information that reserves a subslot from the subslot pattern for the slot for receiving a transmission of a sidelink message to the second UE;
• and
• receiving, by the second UE, the sidelink message from the first UE at least partially in the subslot.

A method for wireless communications at a network entity, comprising:

• transmitting, by the network entity to a group of user equipments (UEs), a first indication of a configuration of a sidelink resource pool for the group of UEs, wherein the sidelink resource pool comprises one or more slots in a time domain and one or more subchannels in a frequency domain, and wherein a slot of the sidelink resource pool comprises a control region allocated for a sidelink control channel and a set of contiguous subslots each allocated for a sidelink data channel;
• transmitting, by the network entity, a second indication for the sidelink resource pool of a subslot pattern for the slot of the sidelink resource pool, the subslot pattern indicating a quantity of subslots within the slot and a length of each subslot of the quantity of subslots;
• identifying, by the network entity, one or more subslots from the subslot pattern for the set of contiguous subslots that are available for sidelink communications;
• and
• transmitting, by the network entity to a UE of the group of UEs, an indication that the one or more subslots are reserved for a sidelink transmission by the UE associated with the sidelink communications.

An apparatus for wireless communications by a first user equipment (UE), comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive, by the first UE, a first indication of a configuration of a sidelink resource pool for a group of UEs that includes the first UE, wherein the sidelink resource pool comprises one or more slots in a time domain and one or more subchannels in a frequency domain, and wherein a slot of the sidelink resource pool comprises a control region allocated for a sidelink control channel and a set of contiguous subslots each allocated for a sidelink data channel;
• receive, by the first UE, a second indication for the sidelink resource pool of a subslot pattern for the slot of the sidelink resource pool, the subslot pattern indicating a quantity of subslots within the slot and a length of each subslot of the quantity of subslots;
• transmit, by the first UE to a second UE of the group of UEs in the control region of the slot, sidelink control information that reserves a subslot from the subslot pattern for the slot for a transmission of a sidelink message to the second UE;
• and
• transmit, by the first UE, at least a portion of the sidelink message to the second UE in the subslot.