PSFCH Feedback Encoding Using Resource Combinations and Frequency Diversity

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Solution Overview

Problem

Existing NR sidelink communications face challenges in efficiently utilizing PSFCH resources for enhanced feedback, particularly in scenarios requiring high throughput and reliability, such as advanced driving and autonomous vehicle platooning, due to resource inefficiencies and potential collisions, which can lead to increased latency and power consumption.

Innovation Solution

Encoding enhanced feedback information into a combination of PSFCH resources using additional resource blocks, dividing transmissions into subsets, and employing interlaced frequency diversity to reduce collisions and optimize resource usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional PSFCH resources are used for feedback transmission, then feedback can be provided, but resource utilization is inefficient and collisions with other transmissions occur

Engineering Contradiction:

Improvefeedback transmission reliabilityVSAvoidresource utilization efficiency

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The PSFCH resource pool is segmented into multiple individual resource blocks instead of treating it as a unified resource. Each resource block can be independently selected and assigned for feedback transmission, enabling more granular control and efficient resource utilization while reducing collisions.

Inventive Principle:

Principle #1Segmentation

2Loss of information

If more PSFCH resources are allocated for enhanced feedback, then more information can be transmitted, but resource usage increases

Engineering Contradiction:

Improvefeedback information capacityVSAvoidPSFCH resource consumption

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

Multiple feedback information elements (HARQ-ACK, CSI, and other uplink control information) are merged and multiplexed onto a single PSFCH resource block. This combining approach enables comprehensive feedback transmission without proportionally increasing resource consumption, as multiple data streams share the same physical resource efficiently.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If PSFCH transmissions are increased for enhanced feedback, then feedback capability is improved, but transmission latency increases

Engineering Contradiction:

Improvefeedback capabilityVSAvoidtransmission latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

PSFCH resources are pre-configured and pre-allocated in advance for enhanced feedback transmissions. By having resources ready beforehand rather than allocating them dynamically when needed, the system eliminates additional allocation delay and reduces overall transmission latency while maintaining enhanced feedback capabilities.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12634087B2Encoding enhance feedback through combinations of PSFCH resources

Publication Date: 2026.05.19 SAMSUNG ELECTRONICS CO LTD

AI summary

A system and a method are disclosed for sending enhanced feedback through PSFCH resources. In an embodiment, a receiving user equipment (Rx UE) determines that enhanced feedback is to be sent to a transmitting user equipment (Tx UE), such as based on resource pool configuration, a request from the Tx UE for enhanced feedback, or detection of a triggering event. The Rx UE encodes the enhanced feedback into a combination of a plurality of PSFCH resources based on an encoding scheme. The Rx UE then transmits the encoded feedback information in the plurality of PSFCH resources.