Method and apparatus for sidelink transmission and resource allocation

A user equipment (UE) comprising:

• at least one processor;
• a non-transitory computer-readable medium having stored thereon, computer-executable instructions, that when executed by the at least one processor, cause the UE to perform operations comprising:
• receiving, from a base station, configuration information, the configuration information comprising a plurality of sets of configuration parameters for sidelink (SL) data transmissions with at least one other UE, each set of the plurality of sets of configuration parameters having a corresponding configuration index that corresponds to an SL grant-free (GF) resource configuration;
• transmitting, to a second UE, sidelink control information (SCI) used for indicating transmission resource information for scheduling a SL data transmission from the UE to the second UE, wherein the SCI comprises a first configuration index identifying a first set of configuration parameters of the plurality of sets of configuration parameters for the SL data transmission, wherein the first configuration index in the SCI corresponds to a first GF SL resource configuration, and wherein the first set of configuration parameters corresponding to the SL first GF resource configuration includes a frequency resource, a periodicity, a number of hybrid automatic repeat request (HARQ) processes, and feedback channel parameters;
• and
• transmitting, to the second UE, the SL data transmission.

A method comprising:

• receiving, by a first user equipment (UE) from a base station, configuration information, the configuration information comprising a plurality of sets of configuration parameters for sidelink (SL) data transmissions between at least two UEs, each set of the plurality of sets of configuration parameters having a corresponding configuration index that corresponds to an SL grant-free (GF) resource configuration;
• receiving, by the first UE from a second UE, sidelink control information (SCI) used for indicating transmission resource information for scheduling a SL data transmission from the second UE, wherein the SCI comprises a first configuration index identifying a first set of configuration parameters of the plurality of sets of configuration parameters for the SL data transmission, wherein the first configuration index in the SCI corresponds to a first SL GF resource configuration, and wherein the first set of configuration parameters corresponding to the SL first GF resource configuration includes a frequency resource, a periodicity, a number of hybrid automatic repeat request (HARQ) processes, and feedback channel parameters;
• decoding, by the first UE, the SCI;
• and
• determining, by the first UE, a location in a transmission resource where the SL data transmission is transmitted by the second UE based on the SCI decoded by the first UE.

A user equipment (UE) comprising:

• at least one processor;
• a non-transitory computer-readable medium having stored thereon, computer-executable instructions, that when executed by the at least one processor, cause the UE to perform operations comprising:
• receiving, from a base station, configuration information, the configuration information comprising a plurality of sets of configuration parameters for sidelink (SL) data transmissions between at least two UEs, each set of the plurality of sets of configuration parameters having a corresponding configuration index that corresponds to an SL grant-free (GF) resource configuration;
• receiving, from a second UE, sidelink control information (SCI) used for indicating transmission resource information for scheduling a SL data transmission from the second UE, wherein the SCI comprises a first configuration index identifying a first set of configuration parameters of the plurality of sets of configuration parameters for the SL data transmission, wherein the first configuration index in the SCI corresponds to a first SL GF resource configuration, and wherein the first set of configuration parameters corresponding to the SL first GF resource configuration includes a frequency resource, a periodicity, a number of hybrid automatic repeat request (HARQ) processes, and feedback channel parameters;
• decoding the SCI;
• and
• determining a location in a transmission resource where the SL data transmission is transmitted by the second UE based on the SCI decoded by the UE.