Sidelink Resource Selection Using RSRP Threshold Coordination
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Solution Overview
Problem
Existing sidelink communication systems face inefficiencies in resource selection and coordination among wireless devices, leading to suboptimal data transmission performance and increased interference.
Innovation Solution
Implementing a mechanism for sidelink resource selection that includes periodic partial sensing and contiguous partial sensing, along with inter-UE coordination, to optimize resource allocation and minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional resource selection methods are used in sidelink communication, then device complexity is reduced, but data transmission efficiency deteriorates due to suboptimal resource allocation
Solution Approach 1:
The system performs partial sensing operations in advance to identify and reserve suitable resources before actual data transmission. The transmitting device senses the channel periodically and contiguously, predicts future resource availability, and makes resource reservations proactively, avoiding last-minute resource selection that would reduce transmission efficiency.
Solution Approach 2:
The resource selection process is divided into distinct phases: periodic partial sensing for long-term resource identification, contiguous partial sensing for short-term resource validation, and inter-UE coordination for conflict resolution. This segmentation allows each component to be optimized independently while maintaining overall system efficiency.
2Object-affected harmful factors
If resource coordination among multiple UEs is implemented, then interference is reduced, but device complexity and signaling overhead increase
Solution Approach 1:
The inter-UE coordination mechanism employs feedback loops where transmitting devices share resource selection information with neighboring UEs. Each UE provides feedback about its resource usage and channel conditions, allowing the system to dynamically adjust resource allocations and resolve conflicts without centralized control, thereby reducing interference while maintaining manageable complexity.
Solution Approach 2:
The patent introduces a coordination message exchange mechanism that acts as an intermediary between competing UEs. Rather than direct conflict resolution between devices, UEs communicate through standardized coordination messages that facilitate resource negotiation and interference avoidance in a structured manner, reducing the complexity of direct peer-to-peer coordination.
3Measurement precision
If periodic and contiguous partial sensing are performed, then resource allocation accuracy is improved, but use of energy increases due to continuous monitoring
Solution Approach 1:
The system implements periodic partial sensing where the transmitting device monitors the channel at regular intervals rather than continuously. This periodic monitoring maintains adequate resource allocation accuracy by capturing channel conditions at meaningful frequency while allowing the device to enter low-power states between sensing periods, thereby reducing overall energy consumption.
Solution Approach 2:
The patent applies partial sensing by selectively monitoring only the specific time-frequency resources relevant to sidelink communication rather than the entire spectrum. This partial observation approach achieves sufficient measurement precision for resource allocation while significantly reducing the energy expenditure associated with full-spectrum continuous monitoring.
Data Source
AI summary
A wireless device receives a message indicating a reference signal received power (RSRP) threshold value associated with a resource pool shared between a first radio access technology (RAT) and a second RAT, and transmits, via a first resource of the resource pool, a first sidelink transmission using the first RAT based on the RSRP threshold value. The RSRP threshold value is selected based on a first priority of the first sidelink transmission using the first RAT and a second priority indicated by a first sidelink control information, SCI, using the second RAT, reserving a second resource overlapping with a periodic resource of the first resource.