Beam-Based Sidelink Resource Selection for FR2 Conflict Avoidance
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Solution Overview
Problem
The existing resource selection process in frequency range 2 (FR2) for distributed sidelink systems does not address potential conflicts between terminal devices, leading to sending conflicts that need to be resolved.
Innovation Solution
A communication method and apparatus that utilize beam-based resource selection, where a receiver UE indicates available candidate resource sets to a transmitter UE using sidelink transmission configuration indication (SL TCI) state identifiers, and conflict indication information to avoid resource conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam-based resource selection is implemented in FR2, then sending conflicts are reduced, but device complexity increases
Solution Approach 1:
The resource pool is segmented into multiple candidate resource sets, each associated with a specific beam. This segmentation allows the transmitter UE to select resources based on beam direction, reducing sending conflicts by ensuring that resources are allocated according to spatial separation. The receiver UE provides feedback indicating which beam-specific resource sets are available, enabling the transmitter to make informed selections without exhaustive complexity.
Solution Approach 2:
The system changes the parameter of resource selection from generic time-frequency resources to beam-specific resources. By introducing beam identification as a new parameter dimension, the system reduces conflicts in FR2 where directional communication is critical. The receiver UE feedback includes beam information that transforms the resource selection process into a multi-parameter optimization problem rather than simple resource availability checking.
2Measurement precision
If receiver UE provides detailed candidate resource set feedback, then transmitter UE resource selection accuracy improves, but signaling overhead increases
Solution Approach 1:
The system extracts only the essential information needed for resource selection from the complete resource pool state. Instead of transmitting full resource availability maps, the receiver UE provides feedback that identifies candidate resource sets associated with specific beams. This extracted information is sufficient for the transmitter to make accurate selections while minimizing signaling overhead by omitting redundant resource pool details.
Solution Approach 2:
The receiver UE performs preliminary analysis of the resource pool and pre-identifies suitable candidate resource sets before providing feedback to the transmitter. This preliminary action allows the receiver to curate a focused list of recommended resources rather than transmitting complete resource status information. The transmitter then selects from this pre-filtered set, achieving high selection accuracy with reduced signaling requirements.
Data Source
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AI summary
A communication method and a related apparatus are provided. The method includes: determining a first candidate resource set corresponding to a first beam, where the first beam is any beam in a beam set, and the beam set includes a plurality of beams; determining a first time-frequency resource based on the first candidate resource set; and sending first sidelink information to a first terminal device on the first time-frequency resource by using the first beam. According to the method in this application, resource selection in FR2 can be implemented.