Sidelink Resource Sensing for Exceptional V2X Events
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Solution Overview
Problem
Existing sidelink communication systems in V2X environments face service interruptions due to resource sensing procedures, which are time-consuming and detrimental for mission-critical services, especially during exceptional events like radio link failures or handovers.
Innovation Solution
A method and system for wireless devices to acquire resource pools from network nodes for exceptional communications, allowing for immediate resource selection and transmission without completing full sensing procedures, thereby minimizing service disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless devices perform full resource sensing procedures before selecting resources for sidelink transmission, then resource selection reliability is improved, but service interruption time increases and productivity decreases
Solution Approach 1:
The network node pre-configures multiple resource pools with different characteristics (e.g., different time frequencies, different sizes) before the wireless device needs to transmit. When exceptional events occur, the device can immediately select from these pre-prepared pools without performing full sensing procedures, thus resolving the contradiction between reliability and time loss.
Solution Approach 2:
The resource pool is divided into multiple segments or subsets with different properties. The wireless device can select appropriate segments based on the specific exceptional situation without needing to sense the entire resource pool, reducing sensing time while maintaining reliable resource selection.
2Measurement precision
If wireless devices perform full resource sensing procedures, then resource selection accuracy is improved, but energy consumption increases
Solution Approach 1:
Instead of performing complete sensing procedures on all available resources, the wireless device performs partial sensing only on the necessary subset of resource pools configured by the network. This partial action maintains sufficient selection accuracy while significantly reducing energy consumption during exceptional events.
3Stability of the object's composition
If wireless devices use pre-configured resource pools for exceptional communications, then service continuity is improved, but resource allocation flexibility decreases
Solution Approach 1:
The network node dynamically configures and updates multiple resource pools with different characteristics based on changing network conditions and service requirements. The wireless device can switch between different pre-configured pools depending on the type of exceptional event and current conditions, maintaining service continuity while preserving flexibility through network-controlled adaptation.
Data Source
AI summary
According to certain embodiments, a method by a wireless device is provided for resource sensing. The method includes acquiring, from a network node, an indication of resources associated with a first resource pool. The first resource pool is for use in an exceptional communication with another device. A triggering event associated with signalling from the network node is identified. Based on the triggering event, a need for the exceptional communication with the other device is determined. At least one resource is selected from the first resource pool, and a message is transmitted using the at least one resource selected from the first resource pool.