NR V2X Sidelink CR CBR Measurement Resource Unit
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Solution Overview
Problem
Current wireless communication systems, particularly in the context of New Radio (NR) sidelink and Vehicle-to-Everything (V2X) communications, face challenges in efficiently managing channel resources due to the flexible slot format, leading to unfairness among user equipment (UEs) in Channel Occupancy Ratio (CR) and Channel Busy Ratio (CBR) measurements.
Innovation Solution
A method and device for performing sidelink communication by measuring CR or CBR based on a first resource unit, where the number of symbols in the resource unit corresponds to the number of sidelink symbols within a slot, allowing for fair and efficient resource allocation across multiple slots within a resource pool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible slot format is used in NR sidelink/V2X, then adaptability of communication format is improved, but fairness of CR and CBR measurements among UEs deteriorates
Solution Approach 1:
The patent changes the measurement parameter from fixed subframe-based CR/CBR to flexible slot-based CR/CBR, adjusting the measurement unit to match the variable slot structures in NR sidelink. This allows the measurement framework to adapt to different slot formats while maintaining fairness through consistent measurement criteria across all UEs.
Solution Approach 2:
The patent introduces dynamic measurement resources that can be flexibly configured according to slot formats. The measurement opportunities and resource units are dynamically adjusted based on the actual slot structure, enabling the system to handle varying slot configurations while ensuring fair measurement conditions for all user equipment.
2Ease of operation
If measurement is performed over entire slot regardless of sidelink symbols, then measurement simplicity is improved, but measurement accuracy deteriorates due to including non-sidelink symbols
Solution Approach 1:
The patent segments the slot into sidelink-related symbols and non-sidelink symbols, creating separate measurement resources for each. This segmentation allows accurate measurement of CR and CBR by considering only the relevant sidelink symbols, while maintaining operational simplicity through standardized measurement procedures applied to the segmented resources.
Solution Approach 2:
The patent applies different measurement qualities to different parts of the slot. Sidelink symbols receive dedicated measurement attention with appropriate measurement resources, while non-sidelink symbols are excluded or treated differently. This local differentiation ensures measurement accuracy for sidelink communication without overcomplicating the overall measurement process.
3Stability of the object's composition
If CR and CBR are measured using fixed resource units, then measurement consistency is improved, but resource allocation fairness deteriorates in flexible slot scenarios
Solution Approach 1:
The patent transitions from fixed resource units to dynamic resource units that adapt to slot formats. The measurement resources are configured to match the actual sidelink resource allocation in each slot, ensuring both consistency in measurement methodology and fairness in resource allocation assessment across different flexible slot configurations.
Data Source
AI summary
Provided herein are a method for performing sidelink communication by a first device (100) and a device for supporting the same. The method may include the steps of performing at least one of Channel occupancy Ratio (CR) measurement or Channel Busy Ratio (CBR) measurement based on a first resource unit, and performing the sidelink communication based on the measurement, wherein a number of symbols of the first resource unit may be a number of symbols related with sidelink being included in a first slot, among a plurality of slots within a resource pool.