Beam-Based Sidelink Resource Pool Selection After Beam Failure
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Solution Overview
Problem
In beam-based communication systems, beam failures can lead to inefficient resource selection and consumption of power due to unnecessary operations and unreliable candidate resource determination, particularly in FR2 operations, as existing methods do not adequately consider beam failure information during resource pool selection.
Innovation Solution
The MAC layer selects a sidelink resource pool and creates a sidelink grant by excluding resources associated with failed beams, using criteria such as BLER, SINR, RSRP/RSRQ, and RSSI thresholds to ensure reliable resource selection, thereby optimizing resource usage and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam failure information is not considered during resource pool selection, then resource selection process is simpler, but resource selection reliability deteriorates due to selection of failed beam resources
Solution Approach 1:
The patent applies preliminary action by performing beam failure detection and identifying failed beams before the resource pool selection process. The MAC layer obtains beam failure information from the PHY layer in advance, excludes resource pools associated with failed beams, and then performs resource selection only from the remaining reliable resource pools. This ensures that resource selection reliability is improved without adding significant complexity during the actual resource selection moment.
2Reliability
If all resource pools are evaluated for candidate resource determination, then comprehensive resource assessment is achieved, but power consumption increases due to unnecessary operations on failed beam resources
Solution Approach 1:
The patent applies the taking out principle by extracting and removing resource pools associated with failed beams from the set of candidate resource pools before performing comprehensive evaluation. By excluding these unreliable resource pools in advance, the system avoids wasting power on evaluating and operating with failed beam resources, while still maintaining comprehensive assessment of the remaining reliable resources.
3Productivity
If beam failure information is integrated into resource pool selection, then resource utilization efficiency improves, but system complexity increases due to additional information processing
Solution Approach 1:
The patent applies self-service by enabling the MAC layer to autonomously obtain beam failure information from the PHY layer and independently perform resource pool exclusion and selection without requiring complex external coordination or additional network infrastructure. This self-contained approach improves resource utilization efficiency while limiting system complexity growth to only the necessary information processing within the UE itself.
Data Source
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AI summary
Provided are a method by which a first device performs wireless communication and an apparatus supporting same. The method may comprise the steps of: acquiring information associated with at least one beam for which a beam failure has been detected; determining a set of candidate resources on a resource pool excluding, from among a plurality of resource pools, at least one resource pool associated with the at least one beam for which the beam failure has been detected; and generating a grant on the basis of information associated with the set of candidate resources. For example, the information associated with the at least one beam for which the beam failure has been detected may be transmitted from a lower layer of the first device to a higher layer of the first device.