Sensing-Based Distributed Scheduling for Event-Based MC V2X Traffic
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Solution Overview
Problem
Current sensing-based distributed scheduling for periodic V2X traffic does not adequately address the needs of event-based mission critical (MC) data transmission, which requires low latency and high reliability, often resulting in insufficient resources for initial MC data transmission within stringent latency bounds.
Innovation Solution
A vehicle-capable user equipment (vUE) is configured to sense sidelink control information (SCI) for resource selection, identify necessary resources for MC data transmission, and revoke resources from low-priority data to ensure timely and reliable transmission of MC data by selecting revocable resources within the MC latency budget.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sensing-based distributed scheduling is used for periodic V2X traffic, then resource allocation for periodic traffic is improved, but resource availability for event-based mission critical data transmission deteriorates
Solution Approach 1:
The patent extracts mission critical data transmissions from the general periodic V2X scheduling framework. When MC data arrives, the system identifies and separates these high-priority transmissions from regular periodic traffic, allowing them to be handled through a special resource revocation mechanism that overrides normal scheduling decisions.
Solution Approach 2:
The system dynamically changes resource allocation parameters based on traffic type. For mission critical data, it modifies the resource selection process by introducing revocable resource identification and priority-based allocation, transitioning from static periodic scheduling to dynamic event-driven resource management.
2Productivity
If resources are allocated for periodic V2X traffic, then resource utilization for scheduled traffic is improved, but latency for event-based mission critical data transmission increases
Solution Approach 1:
The patent performs preliminary identification of revocable resources before mission critical data transmission. By pre-identifying resources that can be revoked from periodic traffic schedules, the system prepares a pool of available resources that can be immediately allocated to MC data, avoiding the need for complex real-time resource negotiation and reducing transmission latency.
Solution Approach 2:
The system introduces dynamic resource allocation that adapts to event-based traffic needs. Resources are not statically assigned but can be dynamically revoked and reallocated based on the arrival of mission critical data, creating a flexible scheduling mechanism that responds to changing traffic priorities in real-time.
3Device complexity
If distributed scheduling is used without resource revocation, then scheduling simplicity is maintained, but resource sufficiency for MC data transmission deteriorates
Solution Approach 1:
The patent introduces an intermediary resource revocation mechanism that sits between the periodic scheduling system and event-based MC data transmission. This intermediary layer identifies revocable resources and facilitates their reallocation to MC traffic without requiring complete redesign of the underlying distributed scheduling framework, thus balancing complexity and resource sufficiency.
Data Source
AI summary
Technology is disclosed for a vehicle-capable user equipment (vUE) operable for sensing-based distributed scheduling 5 of event-based mission critical (MC) vehicle-to everything (V2X) traffic. The vUE can sense sidelink control information (SCI) for semi persistent scheduling (SPS) resource selection from one or more SCI messages received in one or more physical sidelink control channels (PSCCHs) from one or more neighboring vUEs. The vUE can identify: a number of MC resources to transmit event10 based MC data with a selected number of repetitions within a latency budget, wherein the MC resources include one or more of MC-SCI or MC data with the selected number of repetitions; and a number of available resources to transmit event-based MC data within the latency budget. The vUE can select revocable resources from one or more scheduled low-priority resources based on the sensed SCI for SPS resource selection.