Sidelink Resource Reservation via Priority Preemption
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Solution Overview
Problem
In wireless communication networks, especially in sidelink communications, the congestion of channels due to many UEs reserving resources leads to a scarcity of available resources for transmission, resulting in significant delays that can violate packet delay budgets and hybrid automatic repeat request delay budgets.
Innovation Solution
Implementing priority-based sidelink network resource reservation, where a UE identifies and selects reserved resources with lower reference signal received powers or lower priorities, allowing it to preempt or override reservations by other UEs, thereby ensuring resource availability and adhering to delay constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple UEs reserve resources in sidelink communications, then resource allocation is achieved, but channel congestion increases and available resources become scarce
Solution Approach 1:
The patent applies parameter changes by introducing priority levels as a new dimension for resource selection. Instead of uniformly treating all UEs equally, the system modifies the selection criteria based on priority parameters, allowing high-priority UEs to access reserved resources while maintaining fairness through structured priority management.
Solution Approach 2:
The patent implements local quality by differentiating treatment based on UE priority levels. Each UE is assigned a specific priority level that determines its access rights to reserved resources, creating localized differences in resource allocation behavior rather than uniform treatment across all UEs.
2Ease of operation
If UEs select resources without considering reservation status, then selection process is simple, but delays occur that violate packet delay budgets
Solution Approach 1:
The patent applies preliminary action by having UEs check the reservation status of selected resources before finalizing transmission. This advance verification ensures that resources are actually available and not already reserved by other UEs, preventing delays while maintaining a straightforward selection process.
Solution Approach 2:
The patent implements feedback mechanisms where UEs receive information about reservation status of selected resources and adjust their selections accordingly. This feedback loop ensures timely detection of resource conflicts and enables UEs to switch to alternative resources, preventing delay violations.
3Reliability
If priority-based resource reservation is implemented, then resource availability is ensured for high-priority UEs, but system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing UEs into different priority levels or groups. This segmentation allows the system to manage resource allocation in a structured manner, where each segment (priority level) has defined access rights, simplifying the overall complexity through hierarchical organization rather than treating all UEs uniformly.
Solution Approach 2:
The patent implements dynamics by making priority levels configurable and adaptable. The system can dynamically adjust priority assignments based on traffic conditions, packet types, or UE configurations, allowing flexibility without requiring complex static allocation schemes for all possible scenarios.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a packet at a transmitter of the UE for transmission in a sidelink network. The UE may select one or more resources for transmission of the packet based at least in part on a reservation status of the one or more resources, wherein at least one of the one or more resources is a reserved resource that is reserved by another UE. The UE may transmit the packet using the one or more resources based at least in part on selecting the one or more resources. Numerous other aspects are provided.