Sidelink Resource Conflict Indication for Reliable Mode 2 Scheduling
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Solution Overview
Problem
There is no reliable solution for transmitting 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 a second time or frequency domain position based on the position of first sidelink control information, identify resource conflicts, and send a resource conflict indication to other terminal devices to adjust or reselect resources, thereby improving transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminal devices independently perform resource sensing and selection in mode 2 of sidelink communication, then device autonomy and communication flexibility are improved, but resource conflicts between terminal devices occur more frequently
Solution Approach 1:
The patent implements a feedback mechanism where terminal devices send resource conflict indication information to assist terminal devices. This feedback loop allows devices to report resource conflicts detected through independent sensing, enabling the network or other terminals to adjust resource allocation and resolve conflicts, thus maintaining device autonomy while reducing resource conflicts.
Solution Approach 2:
The patent introduces assist terminal devices as intermediaries that help transmit resource conflict indication information between transmit terminal devices and the network or other terminals. This intermediary mechanism facilitates coordinated resource management while preserving the independent resource sensing and selection capability of terminal devices.
2Device complexity
If assistance information is transmitted without reliable transmission mechanisms, then communication overhead is reduced, but transmission reliability of assistance information deteriorates
Solution Approach 1:
The patent employs preliminary actions to ensure reliable transmission of assistance information. These include pre-configuring transmission parameters, pre-establishing resource allocations for feedback channels, and performing preliminary checks before transmission. Such preliminary measures guarantee that assistance information reaches the intended recipients reliably without adding significant communication overhead during actual operation.
3Reliability
If resource conflict indication is sent at determined time domain and frequency domain positions before conflict positions, then transmission reliability is improved, but time and frequency resource allocation complexity increases
Solution Approach 1:
The patent utilizes parameter changes in the time and frequency domains to improve transmission reliability. By dynamically adjusting the time domain position and frequency domain position of resource conflict indications based on detected conflicts, the system ensures reliable delivery of critical information. The determined positions are calculated using parameters such as slot offsets, subchannel allocations, and resource reservation periods, which are configured to balance reliability with allocation complexity.
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.