PSFCH Resource Determination for Multi-Carrier Sidelink Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting physical sidelink feedback channels (PSFCHs) across multiple sidelink carriers, particularly in aligning resources for time-aligned PSFCH transmissions.
Innovation Solution
A user equipment (UE) is configured to receive information related to sidelink operations on multiple sidelink carriers and determine resources for PSFCH transmission from a sidelink resource pool, ensuring alignment with the PSFCH transmission occasion resources across carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If PSFCH transmissions are performed on multiple sidelink carriers without resource alignment, then the quantity of feedback channels increases, but resource coordination complexity and transmission reliability deteriorate
Solution Approach 1:
The patent segments the PSFCH transmission resources across multiple carriers by defining carrier-specific resource pools and association rules. Each carrier is assigned specific PSFCH resources (time-frequency slots) that are determined based on the carrier index and configured parameters, thereby dividing the overall feedback transmission task into manageable carrier-specific segments that can be coordinated independently.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by defining cross-carrier associations through higher-layer configuration parameters. The resource selection mechanism extends beyond single-carrier limitations by incorporating carrier index as an additional dimension in the resource determination formula, enabling systematic coordination across multiple carriers while maintaining structured resource management.
2Adaptability or versatility
If PSFCH resources are allocated independently on each carrier, then resource allocation flexibility increases, but transmission alignment and reliability worsen
Solution Approach 1:
The patent implements preliminary action by pre-configuring carrier associations and resource pool parameters through higher-layer signaling before actual PSFCH transmissions occur. The network configures association parameters (such as carrier index mappings and resource pool identifiers) in advance, allowing UEs to deterministically determine aligned resources across carriers without requiring real-time coordination, thus ensuring transmission alignment while maintaining flexibility.
Solution Approach 2:
The patent utilizes parameter changes by allowing the network to dynamically adjust resource pool configurations and association parameters through reconfiguration signaling. The resource determination formulas incorporate configurable parameters (such as resource pool offsets and carrier mapping rules) that can be modified to adapt to different transmission scenarios, thereby maintaining both flexibility and alignment reliability.
3Adaptability or versatility
If cross-carrier PSFCH transmission is supported, then system versatility improves, but resource determination complexity increases
Solution Approach 1:
The patent implements self-service by enabling UEs to autonomously determine PSFCH resources on target carriers using pre-configured association parameters and deterministic formulas. Each UE independently calculates the appropriate resource based on the source carrier identifier and configured mapping rules, without requiring complex inter-UE coordination or centralized resource assignment, thereby reducing overall system complexity while supporting cross-carrier transmissions.
Data Source
AI summary
Apparatuses and methods for transmission of physical sidelink feedback channels (PSFCHs). A method performed by a user equipment (UE) in a wireless communication system includes receiving first information related to a sidelink operation on multiple sidelink carriers and receiving, via a sidelink control information (SCI) format, second information related to a first carrier from the multiple sidelink carriers for transmission of a PSFCH. The PSFCH includes hybrid automatic repeat request acknowledgement (HARQ-ACK) information corresponding to reception of a physical sidelink shared channel (PSSCH). Reception of a physical sidelink control channel (PSCCH) associated with the PSSCH is on a second carrier. The method further includes determining a resource for transmission of the PSFCH on the first carrier from a sidelink resource pool of PSFCH resources associated with the first carrier and transmitting the PSFCH on the first carrier using the resource.