V2X Resource Preemption Control via Time Interval Comparison
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Solution Overview
Problem
In New Radio (NR) vehicle-to-everything (V2X) communication, resource preemption leads to frequent resource preemption, compromising resource security as terminal devices may preempt resources even after receiving preemption messages, resulting in service delays and inefficient resource utilization.
Innovation Solution
Implementing a method where terminal devices determine whether to preempt resources based on time intervals, specifically comparing a first time interval related to the resource with a second time interval indicating a preemption forbidden time, to prevent arbitrary preemption and reduce frequent resource preemption, thereby enhancing resource security and utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If terminal devices preempt resources based on priority comparison, then service transmission efficiency is improved, but resource security deteriorates due to frequent preemption
Solution Approach 1:
The patent applies preliminary action by introducing a preemption counter that is incremented before resource preemption occurs. This counter tracks the number of preemptions and enables subsequent prevention actions when a threshold is reached, allowing the system to proactively prevent frequent preemption before it degrades resource security
Solution Approach 2:
The patent implements feedback through the preemption counter mechanism that monitors resource preemption events and provides feedback to terminal devices. When the counter reaches a threshold, the system sends indication information to prevent further preemption, creating a closed-loop control that balances service efficiency with resource security
2Productivity
If preemption messages are sent to indicate preempted resources, then resource allocation efficiency is improved, but resource security deteriorates as resources may be preempted again
Solution Approach 1:
The patent implements feedback by having receiving terminal devices monitor and count preemption events for resources they have reserved. This feedback mechanism allows the system to track preemption frequency and trigger prevention actions when thresholds are exceeded, preventing the cycle of repeated preemption
Solution Approach 2:
The patent applies preliminary anti-action by introducing indication information that actively prevents further preemption when the preemption counter reaches a threshold. This counter-action opposes the preemption behavior and protects resource security by blocking additional preemption attempts on frequently preempted resources
3Productivity
If terminal devices autonomously select resources through sensing, then resource utilization is improved, but service delay increases due to reselection time
Solution Approach 1:
The patent applies preliminary action by enabling terminal devices to perform sensing and resource selection in advance while introducing a preemption counter mechanism. This allows devices to prepare resource selections beforehand, reducing the need for urgent reselection and minimizing service delay when preemption occurs
Data Source
AI summary
Embodiments of this application provide a resource preemption method, an apparatus, and a system, to reduce a quantity of times of frequent resource preemption, and improve resource security. In one example, a first terminal device obtains a first time interval and a second time interval, and preempts or determines not to preempt a first resource according to a first preset rule. The first resource is a resource reserved by a second terminal device or a resource reserved for a first service to be transmitted by the first terminal device. The first time interval is a time interval related to the first resource. The second time interval is used to indicate a preemption forbidden time. The first preset rule is determined based on the first time interval and the second time interval.