Sidelink Resource Conflict Indication for Reliable Mode 2 Scheduling
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Solution Overview
Problem
There is a lack of reliable transmission of assistance information in sidelink communication, particularly in mode 2 of sidelink communication where terminal devices independently perform resource sensing and selection, leading to potential resource conflicts.
Innovation Solution
A method is provided to determine conflict positions in time and frequency domains based on sidelink control information and send resource conflict indications to improve reliability, allowing for resource reselection or changing reserved resources to avoid conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminal devices independently perform resource sensing and selection in mode 2 sidelink communication, then device autonomy and communication flexibility are improved, but resource conflicts between devices increase
Solution Approach 1:
The patent implements a feedback mechanism where terminal devices send resource conflict indications to assistive terminal devices. The assistive terminal device receives these indications and uses them to determine resource sets that avoid conflicts. This feedback loop enables devices to adapt their resource selection based on actual conflict situations, resolving the contradiction between autonomous operation and conflict avoidance.
Solution Approach 2:
The patent introduces an assistive terminal device as an intermediary between transmitting terminal devices. This intermediary collects resource conflict indications from multiple transmitters, processes the information, and provides recommended resource sets that avoid conflicts. The intermediary mechanism enables autonomous devices to coordinate their resource usage without direct interference, maintaining device independence while reducing conflicts.
2Measurement precision
If assistive terminal devices collect resource conflict indications from multiple transmitters, then resource selection accuracy is improved, but transmission reliability of assistance information deteriorates due to potential losses
Solution Approach 1:
The patent implements preliminary action by having transmitting terminal devices send resource conflict indications to assistive terminal devices before actual resource conflicts occur. This advance notification allows the assistive device to pre-determine conflict-free resource sets, ensuring that when transmission is needed, reliable resources are already identified and reserved, preventing information loss and ensuring transmission reliability.
Solution Approach 2:
The patent applies beforehand cushioning by creating a buffer mechanism where resource conflict indications are collected and processed in advance. The assistive terminal device maintains a repository of determined resource sets that can be quickly retrieved and applied when conflicts are detected, cushioning against potential information transmission losses by having pre-prepared alternative resources.
3Reliability
If resource conflict indications are sent at determined time domain and frequency domain positions, then transmission reliability is improved, but system complexity increases due to position determination requirements
Solution Approach 1:
The patent uses parameter changes by determining specific time domain and frequency domain positions for sending resource conflict indications based on the characteristics of the involved terminal devices and the nature of conflicts. The system dynamically adjusts these positional parameters to optimize transmission reliability while managing complexity through standardized determination methods that consider device capabilities and conflict patterns.
Data Source
AI summary
This application has disclosed a method for sending and transmission of a resource conflict indication and a communication apparatus. When determining that a reserved resource indicated by first SCI conflicts with a reserved resource indicated by second SCI, a first terminal device sends an RCI to a second terminal device at a determined time domain and/or frequency domain position before a conflict position; or when determining that a resource corresponding to first SCI conflicts with a resource corresponding to second SCI, a first terminal device sends an RCI to a second terminal device at a determined time domain and/or frequency domain position after a conflict position. The RCI is sent at the determined time domain and/or frequency domain position, so that reliability of RCI transmission is improved.