Resource allocation for sidelink on unlicensed spectrum

An apparatus, comprising

• a radio frequency module that transmits and receives radio frequency (RF) signal in a wireless network;
• a memory, and
• a processing circuitry coupled to the memory, the processing circuitry configured to:
• determine a resource allocation framework for sidelink communication;
• allocate resources in a resource grid for a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), or a physical sidelink frequency channel (PSFCH) based on the resource allocation framework;
• and
• transmit at least one sub-channel index and at least one resource block (RB) set index to indicate resource allocation information of the PSCCH, the PSSCH, or the PSFCH over a sidelink unlicensed (SL-U) spectrum, wherein the resource allocation framework comprises:
• at least one SL-U component carrier (CC), the at least one SL-U CC including an SL-U bandwidth part (BWP) that includes X RBs indexed from 0 to X−1, the SL-U BWP being divided into Y resource pools (RPs) indexed from 0 to Y−1 and at least one inter-RP guard band (GB) in response to Y being an integer greater than 1, the at least one inter-RP GB being located between two adjacent RPs, the RBs of each RP being divided into N RB sets indexed from 0 to N−1 and at least one intra-cell GB in response to N being an integer greater than 1, the at least one intra-cell GB being located between two adjacent RB sets;
• K interlaces indexed from 0 to K−1 in the SL-U BWP, the X RBs being cyclically mapped to the K interlaces, the interlaces being configured per SL-U BWP;
• and
• L sub-channels indexed from 0 to L−1 in the RB set, the K interlace being mapped to the L sub-channels in the RB set and L sub-channels cyclically indexed across different RB sets within the resource pool, the sub-channels being configured per RB set.

A non-transitory computer-readable medium storing instructions that, when executed by a processor, cause the processor to perform a method, the method comprising:

• determining a resource allocation framework for sidelink communication;
• allocating resources in a resource grid for a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), or a physical sidelink frequency channel (PSFCH) based on the resource allocation framework;
• and
• transmitting at least one sub-channel index and at least one resource block (RB) set index to indicate resource allocation information of the PSCCH, the PSSCH, or the PSFCH over a sidelink unlicensed (SL-U) spectrum, wherein the resource allocation framework comprises:
• at least one SL-U component carrier (CC), the at least one SL-U CC including an SL-U bandwidth part (BWP) that includes X RBs indexed from 0 to X−1, the SL-U BWP being divided into Y resource pools (RPs) indexed from 0 to Y−1 and at least one inter-RP guard band (GB) in response to Y being an integer greater than 1, the at least one inter-RP GB being located between two adjacent RPs, the RBs of each RP being divided into N RB sets indexed from 0 to N−1 and at least one intra-cell GB in response to N being an integer greater than 1, the at least one intra-cell GB being located between two adjacent RB sets;
• K interlaces indexed from 0 to K−1 in the SL-U BWP, the X RBs being cyclically mapped to the K interlaces, the interlaces being configured per SL-U BWP;
• and
• L sub-channels indexed from 0 to L−1 in the RB set, the K interlace being mapped to the L sub-channels in the RB set and L sub-channels cyclically indexed across different RB sets within the resource pool, the sub-channels being configured per RB set.