Interlaced Physical Sidelink Feedback Mapping for Wideband RB-Sets
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently mapping wideband sidelink data resources to feedback resources, particularly in shared or unlicensed frequency bands, leading to suboptimal bandwidth occupancy and power spectral density issues.
Innovation Solution
The implementation of frequency-interlaced waveforms for sidelink transmissions, where UEs map physical sidelink shared channel resources to corresponding feedback channel resources using RB-sets and interlaces, allowing efficient bandwidth utilization and power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional mapping methods are used for wideband sidelink transmissions, then the system structure remains simple, but the bandwidth occupancy is suboptimal and power spectral density requirements cannot be met
Solution Approach 1:
The patent segments the wideband sidelink resources into multiple RB-sets (resource block sets) and maps them to corresponding feedback resources in a segmented manner. Each RB-set is independently mapped to PSFCH resources, allowing efficient bandwidth utilization while maintaining manageable complexity through structured division of the wideband resources
Solution Approach 2:
The patent introduces frequency-domain interleaving by mapping PSSCH resources across multiple RB-sets to PSFCH resources in a frequency-interlaced manner. This dimensional transformation from contiguous frequency allocation to interleaved frequency allocation enables meeting power spectral density requirements while optimizing bandwidth occupancy efficiency
2Productivity
If wideband resources are allocated for sidelink communications, then bandwidth occupancy requirements are met, but power spectral density limits are violated
Solution Approach 1:
The patent applies frequency-interlaced waveform mapping that distributes the wideband transmission across multiple frequency domains in an interleaved pattern. This dimensional transformation spreads the total power over a wider frequency range, reducing the power spectral density at any single frequency while maintaining the required total bandwidth occupancy
Solution Approach 2:
The patent changes the frequency domain parameter distribution by mapping PSSCH resources from contiguous frequency allocation to interleaved frequency allocation across RB-sets. This parameter transformation modifies the spectral density distribution to comply with power spectral density limits while preserving bandwidth occupancy requirements
3Productivity
If frequency-interlaced waveforms are used for wideband sidelink transmissions, then bandwidth occupancy and power spectral density requirements are met, but the mapping complexity increases
Solution Approach 1:
The patent divides the wideband resources into multiple RB-sets and processes each segment independently for mapping to PSFCH resources. This segmentation approach reduces the complexity of handling wideband resources by breaking them down into manageable units that can be mapped systematically
Solution Approach 2:
The patent creates a universal mapping mechanism that handles multiple RB-sets and frequency interlaces through a single systematic approach. The same mapping principles apply across all RB-sets, providing multi-functionality that reduces overall system complexity despite the frequency-interlaced structure
Data Source
AI summary
Systems, devices, and methods for mapping wideband sidelink (SL) resources to SL feedback resources are provided. For example, a method of wireless communication performed by a user equipment (UE) comprises: receiving, based on at least a first interlace of resource blocks (RBs) and based on two or more RB-sets of a shared frequency band, a SL communication; and transmitting, using at least a second interlace of RBs and using resources from at least one RB-set of the two or more RB-sets of the shared frequency band, a SL feedback communication for the SL communication. In some aspects, the transmitting the SL feedback communication is based on a mapping of the two or more RB-sets to the at least one RB-set.