NR Sidelink Resource Selection Avoiding LTE Overlap
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Solution Overview
Problem
The existing wireless communication systems face challenges in efficiently managing sidelink communications between User Equipments (UEs) in the presence of overlapping LTE and New Radio (NR) resources, leading to potential interference and reduced available transmission resources.
Innovation Solution
A method and device for performing wireless communication by selecting a new radio (NR) sidelink resource that does not overlap in time with an LTE sidelink resource, based on a reference signal received power (RSRP) value exceeding a threshold, to ensure efficient and interference-free sidelink communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If NR SL resources are selected without considering LTE SL resource overlap, then resource selection simplicity is improved, but interference between LTE and NR sidelink communications increases
Solution Approach 1:
The patent applies preliminary action by measuring LTE SL RSRP values before selecting NR SL resources. The UE performs RSRP measurements on LTE sidelink resources in advance, compares them against thresholds, and uses this information to predict and avoid potential interference scenarios before they occur, ensuring cleaner resource selection
Solution Approach 2:
The patent introduces RSRP threshold comparison as an intermediary mechanism between LTE resource identification and NR resource selection. The threshold acts as a mediator that translates raw RSRP measurements into actionable selection criteria, enabling the UE to indirectly assess interference potential without direct interference measurement
2Object-affected harmful factors
If NR SL resources overlapping with LTE SL resources are excluded based on RSRP threshold, then interference is reduced, but the number of available NR SL resources decreases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the RSRP threshold based on communication conditions. The threshold is not fixed but can be modified according to factors like traffic requirements, channel conditions, and priority levels, allowing flexible balancing between interference reduction and resource availability
Solution Approach 2:
The patent introduces dynamics by making the resource selection process adaptive rather than static. The UE continuously monitors RSRP values and adjusts its resource selection strategy in real-time, allowing the system to respond to changing channel conditions and maintain optimal performance under varying scenarios
3Measurement precision
If RSRP measurement and threshold comparison are performed for each NR SL resource candidate, then resource selection accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent applies partial action by performing RSRP measurements and threshold comparisons only on a subset of candidate resources rather than exhaustively evaluating all possible NR SL resources. The UE identifies a limited set of promising candidates based on initial criteria and applies detailed RSRP-based filtering only to these, reducing overall processing while maintaining selection quality
Data Source
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AI summary
A method of operating a first device (100) in a wireless communication system is proposed. The method may comprise the steps of: obtaining information about a long-term evolution (LTE) sidelink (SL) resource reserved by a second device (200); obtaining an SL reference signal received power (RSRP) value associated with the LTE SL resource; and based on that the SL RSRP value exceeds a first threshold, selecting a first new radio (NR) SL resource having an associated physical sidelink feedback channel (PSFCH) transmission opportunity which does not overlap that of the LTE SL resource.