Physical Sidelink Feedback Channel Priority Selection Across Carriers

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing physical sidelink feedback channel (PSFCH) communications across multiple carriers, leading to suboptimal resource allocation and interference in carrier aggregation scenarios.

Innovation Solution

A mobile station determines priorities for PSFCH communications on multiple carriers based on predefined priorities and selects the appropriate carriers for transmission or reception, optimizing resource utilization and reducing interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If PSFCH communications are transmitted on multiple carriers simultaneously, then the throughput and reliability of sidelink feedback are improved, but the device complexity and resource management difficulty increase

Engineering Contradiction:

Improvethroughput of PSFCH communicationsVSAvoidcomplexity of managing multiple carriers

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent divides the multiple carrier operations into separate priority determination processes for transmission and reception. The transmission priority is determined based on transmission buffer status and channel conditions, while reception priority is determined based on reception buffer status and interference levels. This segmentation allows independent optimization of each direction without increasing overall system complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary priority determination for both transmission and reception PSFCH communications before actual transmission/reception occurs. By determining priorities in advance based on buffer status and channel conditions, the system prepares carrier selection and resource allocation beforehand, reducing real-time decision complexity during actual PSFCH operations.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If carrier aggregation is used for PSFCH communications, then the reliability and coverage are improved, but the interference management and resource allocation become more difficult

Engineering Contradiction:

Improvereliability of PSFCH communicationsVSAvoidinterference in carrier aggregation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies different priority determination criteria for different carriers based on their local conditions. Transmission priority on each carrier is determined by local buffer status and channel quality, while reception priority is determined by local interference levels and reception conditions. This local quality approach allows optimal resource allocation on each carrier while managing interference locally without affecting the entire carrier aggregation system.

Inventive Principle:

Principle #3Local quality

3Productivity

If priority-based carrier selection is implemented, then the resource allocation efficiency is improved, but the processing overhead and signaling complexity increase

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidprocessing overhead for priority determination

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent implements self-service priority determination where the transmitting UE autonomously determines transmission priority based on its own transmission buffer status and channel conditions, and the receiving UE autonomously determines reception priority based on its reception buffer status and interference levels. This eliminates the need for complex signaling between UEs or centralized control, reducing processing overhead while maintaining efficient resource allocation.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250280425A1Prioritizing physical sidelink feedback channel communications on multiple carriers

Publication Date: 2025.09.04 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a mobile station may determine a respective priority, for each carrier of a plurality of carriers on which a plurality of physical sidelink feedback channel (PSFCH) communications are to be transmitted in one or more PSFCH symbols, based at least in part on priorities of one or more PSFCH communications, of the plurality of PSFCH communications, to be transmitted on that carrier. The mobile station may select a number of carriers, of the plurality of carriers, based at least in part on the respective priority determined for each carrier, of the plurality of carriers. The mobile station may transmit, in the one or more PSFCH symbols, by the mobile station to one or more other mobile stations, PSFCH communications, of the plurality of PSFCH communications, on the number of carriers selected. Numerous other aspects are described.