Adaptive V2V Resource Selection for Latency Constraints
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Solution Overview
Problem
In vehicle-to-vehicle (V2V) communications, the sensing-based resource selection procedure introduces excessive latency, rendering recent sensing history information unavailable or invalid, which can lead to the transmission of outdated messages due to the time required for sensing history collection, exceeding the latency constraints.
Innovation Solution
A user equipment (UE) identifies the unavailability of recent sensing history information and selects a resource selection procedure based on configuration information obtained from a network entity, which can include random resource selection, sensing-based resource selection, or a combination of both, prioritizing the selection based on the priority of the packet to be transmitted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensing-based resource selection procedure is used, then resource selection reliability is improved, but transmission latency increases
Solution Approach 1:
The patent applies dynamics by making the resource selection procedure adaptive rather than static. The UE dynamically switches between sensing-based resource selection and random resource selection based on whether sufficient sensing history is available. This dynamic adaptation resolves the contradiction by using sensing-based selection (high reliability) when conditions permit, and random selection (low latency) when sensing history is insufficient, thus optimizing both reliability and latency according to real-time conditions.
Solution Approach 2:
The patent changes the parameter of sensing history availability to determine the resource selection method. When sensing history duration meets a threshold, sensing-based selection is used; when it falls below the threshold, random selection is used. This parameter-based switching resolves the contradiction by adjusting the selection strategy based on the accumulated sensing time, ensuring reliability when possible and minimizing latency when sensing history is insufficient.
2Measurement precision
If sensing history collection is performed, then resource selection accuracy is improved, but message validity deteriorates
Solution Approach 1:
The patent applies preliminary action by continuously collecting sensing history in advance and monitoring its duration. The UE prepares sensing history accumulation beforehand and uses it when sufficient duration is achieved. However, when the sensing history duration is insufficient before the message latency deadline, the system switches to random resource selection to ensure message validity. This preliminary preparation with conditional usage resolves the contradiction between achieving accurate resource selection and maintaining message validity within latency constraints.
Solution Approach 2:
The system dynamically adjusts the resource selection strategy based on the accumulated sensing history duration. When sensing history meets the required duration threshold, sensing-based selection is applied for accurate resource choice. When the threshold is not met before the latency deadline, the system transitions to random selection to preserve message validity. This dynamic switching resolves the contradiction between measurement precision and message validity.
3Productivity
If sensing-based resource selection is used, then resource allocation efficiency is improved, but transmission timeliness worsens
Solution Approach 1:
The patent implements a dynamic resource selection mechanism that switches between sensing-based selection (for efficiency) and random selection (for timeliness) based on sensing history availability. When sufficient sensing history exists, the system uses sensing-based selection to efficiently allocate resources. When sensing history is insufficient and would cause delays exceeding latency constraints, the system immediately switches to random resource selection to ensure timely transmission. This dynamic adaptation resolves the contradiction between allocation efficiency and transmission timeliness.
Solution Approach 2:
The system changes the selection parameter based on sensing history duration. When the sensing history duration parameter meets the threshold, sensing-based resource selection is applied for efficient allocation. When the parameter falls below the threshold and timeliness is at risk, the system switches to random selection. This parameter-driven switching resolves the contradiction by optimizing for efficiency when possible and timeliness when necessary.
Data Source
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AI summary
Various aspects related to selecting a resource selection procedure for V2V communications are described. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus for selecting a resource selection procedure for V2V transmissions, is described. The apparatus, e.g., a UE, may be configured to identify that recent sensing history information at the UE is unavailable for a sensing based resource selection procedure. The UE may be further configured to select, in response to identifying that the recent sensing history information is unavailable, a resource selection procedure based on configuration information obtained from a network entity. In various configurations, the UE may select a resource for a V2V transmission based on the resource selection procedure selected based on the configuration information.