User equipment (UE) and methods for vehicle-to-vehicle (V2V) sidelink communication in accordance with a short transmission time interval (TTI)

A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors to perform operations for communication by a User Equipment (UE), the operations to configure the one or more processors to:

• select, from candidate resource pools, a resource pool for a vehicle-to-vehicle (V2V) sidelink transmissions by the UE, wherein sub-frames of different candidate resource pools are non-overlapping, and wherein the candidate resource pools are allocated for V2V transmissions of different latencies per candidate resource pool;
• during a sensing window before the selected resource pool, attempt to detect V2V sidelink transmissions by other UEs;
• and
• determine, based on sidelink control information (SCI) included in V2V sidelink transmissions detected in the sensing window, one or more candidate sub-frames of a resource selection window available for the V2V sidelink transmission by the UE, wherein the resource selection window is subsequent to the sensing window.

A User Equipment (UE), comprising:

• memory;
• and
• processing circuitry, configured to:
• select, from a plurality of short transmission time intervals (TTIs), a short TTI for a vehicle-to-vehicle (V2V) sidelink transmission by the UE, wherein a legacy TTI is divided to include the short TTIs;
• encode, for transmission in accordance with. the selected short TTI, a short physical sidelink control channel (sPSCCH) to indicate the V2V sidelink transmission by the UE;
• encode, for transmission in accordance with the selected short TTI, a short physical sidelink shared channel (sPSSCH) based on a block of data bits;
• and
• encode, for transmission in a first chronological symbol period of the legacy TTI, an automatic gain control (AGC) element to enable AGC at legacy UEs or non-legacy UEs, and
• wherein the memory is configured to store information that identities the short TTI.