Sidelink Priority Mapping for Congestion-Controlled Resource Allocation
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Solution Overview
Problem
Current communication technologies lack an effective congestion control mechanism for sidelink communications, leading to performance deterioration in high-load scenarios, which is critical for ensuring high-reliability low-latency services.
Innovation Solution
A sidelink congestion control method that involves determining a physical-layer priority mapping rule and using it to determine a physical-layer priority or priority count value for a terminal, which is then used to allocate transmission resources and manage resource preemption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If autonomous resource selection is performed without congestion control mechanism, then resource allocation flexibility is improved, but network performance deteriorates under high load conditions
Solution Approach 1:
The patent changes the parameter of resource selection by introducing physical-layer priority into the autonomous resource selection process. Terminals with different service types (e.g., URLLC, eMBB) are assigned different physical-layer priorities, which dynamically adjust resource selection behavior. High-priority terminals can preempt resources from low-priority terminals, ensuring reliable performance under high load while maintaining allocation flexibility through priority-based differentiation.
2Quantity of substance
If more terminals access the sidelink simultaneously, then communication coverage is improved, but resource congestion increases
Solution Approach 1:
The patent segments the terminal population into different priority groups based on service type (URLLC, eMBB, etc.). Each segment is assigned a specific physical-layer priority level. This segmentation allows the system to manage multiple terminals simultaneously by treating high-priority traffic differently from low-priority traffic, reducing resource congestion through priority-based resource allocation and preemption mechanisms.
3Reliability
If resource preemption is enabled for high-priority services, then service reliability is improved, but resource allocation complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring physical-layer priority mappings for different service types before resource allocation occurs. The mapping between service types (URLLC, eMBB) and physical-layer priorities is established in advance, allowing terminals to automatically determine their priority level without complex real-time decisions. This simplifies the resource preemption mechanism while ensuring high-reliability service delivery through priority-based resource reservation and preemption rights.
Data Source
AI summary
Embodiments of this disclosure provide a sidelink congestion control method and a device. The method includes: determining a physical-layer priority mapping rule; and determining a physical-layer priority or physical-layer priority count value of a first terminal according to the physical-layer priority mapping rule; where the physical-layer priority or the physical-layer priority count value is used for determining a transmission resource for the first terminal.