PSFCH Resource Allocation Across Multiple Sidelink Carriers
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Solution Overview
Problem
In the New Radio (NR) Sidelink system, determining transmission resources for sidelink feedback channels for Physical Sidelink Shared Channels (PSSCHs) transmitted on multiple carriers is a challenge.
Innovation Solution
A method for determining a target transmission resource for a Physical Sidelink Feedback Channel (PSFCH) is provided, where a first terminal transmits the PSFCH on a first carrier, including feedback information for a PSSCH, and a second terminal receives the PSFCH on the same carrier, using predetermined rules such as CBR, subcarrier spacing, or configuration information to ensure synchronized resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-carrier transmission is used to improve sidelink throughput, then transmission capacity increases, but resource allocation complexity for feedback channels increases
Solution Approach 1:
The feedback resources for multi-carrier PSSCH transmissions are segmented by associating each carrier's feedback with specific PSFCH resources. The receiving terminal determines separate target transmission resources for feedback on different carriers, dividing the complex resource allocation into manageable carrier-specific segments.
Solution Approach 2:
The patent introduces carrier frequency as an additional dimension for resource allocation. By allocating PSFCH resources across multiple carriers and using carrier-specific resource determination, the system transforms the single-dimension resource allocation problem into a multi-dimensional solution space, enabling parallel feedback transmission.
2Reliability
If feedback resources are allocated for each PSSCH on multiple carriers, then feedback completeness improves, but resource coordination difficulty increases
Solution Approach 1:
The patent establishes universal resource allocation rules that work across all carriers. Both transmitting and receiving terminals use the same predetermined rules (based on CBR, subcarrier spacing, or configuration information) to determine target PSFCH resources, ensuring consistent resource coordination without complex carrier-specific configurations.
Solution Approach 2:
The patent implements a feedback mechanism where the receiving terminal determines target transmission resources for PSFCH based on predetermined rules, ensuring that feedback resources are properly coordinated and allocated for each carrier's PSSCH transmissions, maintaining feedback completeness across multi-carrier operations.
3Productivity
If PSFCH transmission is optimized on a single carrier, then transmission efficiency improves, but resource utilization across multiple carriers decreases
Solution Approach 1:
The patent merges PSFCH transmission opportunities across multiple carriers by allowing the receiving terminal to select target transmission resources from available PSFCH resources on different carriers. This combines the resource pools of multiple carriers, improving overall resource utilization while maintaining efficient transmission through standardized resource selection procedures.
Data Source
AI summary
A Physical Sidelink Feedback Channel (PSFCH) transmission method and a terminal device. The method includes: receiving, by a first terminal, Physical Sidelink Shared Channel(s) (PSSCH(s)) transmitted by a second terminal on a plurality of carriers; determining, by the first terminal, to transmit a first PSFCH to the second terminal on a first carrier, the first PSFCH including feedback information for a first PSSCH, and the first PSSCH including at least one PSSCH transmitted on at least one of the plurality of carriers; determining, by the first terminal, a target transmission resource for transmitting the first PSFCH on the first carrier; and transmitting, by the first terminal, a first PSFCH on the target transmission resource on the first carrier.