Sidelink Signal Collision Control Through Channel Priority

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Solution Overview

Problem

Collisions occur when wireless communication devices are configured to perform transmissions or receptions on multiple physical sidelink channels simultaneously, leading to interference and inefficiencies in sidelink communications.

Innovation Solution

A wireless communication device determines whether to transmit a Sidelink Synchronization Signal (SLSS) based on a priority parameter when it collides with a Physical Sidelink Feedback Channel (PSFCH) carrying Sidelink Feedback Control Information (SFCI), using priority parameters associated with the corresponding Physical Sidelink Shared Channel (PSSCH) to manage collisions and optimize transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a wireless communication device transmits both SLSS and PSFCH simultaneously, then transmission diversity is improved, but collision interference occurs reducing communication reliability

Engineering Contradiction:

Improvetransmission diversityVSAvoidcollision interference

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-configuring priority parameters for different physical channels (PSFCH, PSSCH, PSCCH, SLSS) before collisions occur. When a collision is detected, the device uses these pre-established priorities to immediately determine which signal to transmit and which to drop, avoiding the need for complex real-time decision-making and ensuring consistent collision resolution behavior.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent changes the parameter of transmission decision by introducing priority parameters that modify the default transmission behavior. Instead of always transmitting both signals or using fixed transmission rules, the system dynamically adjusts transmission decisions based on the priority values associated with different channels, allowing flexible collision resolution that adapts to different communication scenarios.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the device drops lower-priority signals during collision, then communication reliability is improved, but transmission efficiency deteriorates due to lost opportunities

Engineering Contradiction:

Improvecollision resolutionVSAvoidtransmission efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent implements feedback mechanisms where the receiving device provides feedback information about the received signals and collision detection. This feedback loop allows the transmitting device to learn from previous transmission outcomes and adjust its collision resolution strategy, potentially recovering lost transmission opportunities through adaptive retransmission or priority adjustment based on actual reception feedback.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12408127B2Methods and apparatuses for collision control of sidelink communications in wireless communication system

Publication Date: 2025.09.02 HANNIBAL IP LLC

AI summary

A method performed by a wireless communication device includes determining whether to transmit a first Sidelink Synchronization Signal (SLSS) according to a priority parameter when an occasion of the first SLSS collides with a Physical Sidelink Feedback Channel (PSFCH) that carries Sidelink Feedback Control Information (SFCI). The priority parameter is associated with a Physical Sidelink Shared Channel (PSSCH) that corresponds to the PSFCH.