Sidelink Resource Selection With Spatial Filter Re-Evaluation
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Solution Overview
Problem
Resource selection in sidelink communication using high frequency bands is challenging due to the need for adjusting spatial filters when transmitters and receivers are moving, especially in vehicle-to-everything (V2X) communication.
Innovation Solution
A UE determines a spatial filter configuration associated with a time period, collects sensing information, selects candidate resources, and re-evaluates these resources using the spatial filter configuration to trigger re-selection if necessary, while considering sidelink resource reservation information and SL-RSRP measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spatial filters are adjusted to maintain beam alignment during movement, then communication reliability is improved, but device complexity and operation difficulty increase
Solution Approach 1:
The patent applies preliminary action by performing re-evaluation of selected resources using the spatial filter configuration before actual transmission occurs. The UE re-evaluates the selected resources based on sensing information collected with the spatial filter, and only triggers resource re-selection if the re-evaluation indicates poor channel conditions. This advance checking prevents transmission failures without requiring continuous spatial filter adjustments during transmission.
Solution Approach 2:
The patent implements feedback by using sensing information (including SL-RSRP measurements) to re-evaluate selected resources and determine whether resource re-selection should be triggered. The system continuously monitors channel conditions using the spatial filter configuration and provides feedback to the resource selection process, enabling dynamic adaptation to changing channel conditions while maintaining reliable beam alignment.
2Reliability
If resource re-selection is performed frequently to adapt to movement, then communication reliability is improved, but loss of time and productivity decrease
Solution Approach 1:
The patent uses feedback-based resource re-selection by re-evaluating selected resources using sensing information collected with the spatial filter configuration. Resource re-selection is triggered only when the re-evaluation indicates poor channel conditions, rather than performing re-selection frequently or periodically. This conditional feedback mechanism maintains reliable resource selection while minimizing unnecessary re-selection operations and associated time losses.
3Measurement precision
If sensing information is collected using spatial filter configuration, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by using the spatial filter configuration for multiple purposes: both for collecting sensing information (including SL-RSRP measurements) and for re-evaluating selected resources. The same spatial filter configuration serves dual functions in resource selection and channel quality assessment, reducing the need for separate measurement mechanisms and simplifying overall device complexity while maintaining measurement precision.
Data Source
AI summary
Disclosed are methods, apparatuses, and systems for resource selection in a sidelink communication. One of the methods includes: determining, by a user equipment (UE), a spatial filter configuration, the spatial filter configuration being associated with a first time period: collecting sensing information obtained using the spatial filter configuration, the sensing information including at least one of: sidelink resource reservation information, or at least one sidelink reference signal received power (SL-RSRP) measurement of the sidelink communication: determining one or more candidate resources based on the sensing information: selecting one or more resources from the one or more candidate resources for transmission: re-evaluating using the spatial filter configuration, the selected one or more resources; and determining, based on a result of the re-evaluating of the selected one or more resources, whether a re-selection of the one or more resources is triggered.