FR2 Sidelink Beam Resource Selection to Prevent UE Conflicts
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Solution Overview
Problem
The existing resource selection process in frequency range 2 (FR2) of the sidelink system has not been discussed, leading to potential conflicts in data transmission and communication methods, and existing methods for avoiding conflicts between terminal devices are not defined.
Innovation Solution
A communication method and apparatus that determines a candidate resource set using beams as units, with a receiver UE indicating available resources to a transmitter UE to prevent conflicts, using sidelink transmission configuration indication (SL TCI) state identifiers, and considering adjacent beam interference to select conflict-free resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If resource selection is performed without beam-based segmentation in FR2, then the resource selection process is simpler, but sending conflicts between terminal devices increase
Solution Approach 1:
The patent segments the resource selection process by beam, where each beam independently determines its candidate resource set. This segmentation prevents conflicts between different beams while maintaining overall system reliability, as each beam can select resources without interfering with others.
Solution Approach 2:
The patent introduces a spatial dimension (beam domain) to the resource selection process. By determining candidate resource sets in the beam domain rather than only in the time-frequency domain, the system achieves better conflict avoidance while maintaining manageable complexity through structured spatial separation.
2Reliability
If beam-based candidate resource set determination is implemented, then sending conflicts are reduced, but the device complexity increases
Solution Approach 1:
The patent divides the overall resource pool into multiple beam-specific candidate resource sets, with each set associated with a specific beam. This segmentation allows independent resource selection per beam, reducing inter-beam conflicts while keeping each individual beam's resource selection process manageable and structured.
Solution Approach 2:
The patent performs preliminary determination of beam-specific candidate resource sets before actual data transmission. By pre-establishing these sets based on beam information and sensing results, the system reduces real-time selection complexity while ensuring reliable conflict-free resource allocation.
3Measurement precision
If receiver UE indicates candidate resource sets to transmitter UE, then resource selection accuracy improves, but information overhead increases
Solution Approach 1:
The patent extracts only the essential beam information and associated candidate resource set identifiers needed for accurate resource selection, rather than transmitting complete resource pool information. This extraction maintains selection accuracy while minimizing information overhead by including only necessary parameters.
Solution Approach 2:
The patent changes the parameter representation from detailed resource descriptions to compact beam-based identifiers and candidate set indices. This parameter transformation enables precise resource selection indication while significantly reducing the amount of information that needs to be transmitted between UEs.
Data Source
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.