Sidelink PRS Conflict Indication for Coordinated Resource Selection
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Solution Overview
Problem
Existing wireless communication systems face challenges in improving the sidelink positioning reference signal (SL PRS) transmission function, particularly in scenarios where terminal devices independently select resources, leading to conflicts and inefficiencies such as hidden nodes, half-duplex issues, and excessive power consumption.
Innovation Solution
A method and apparatus are introduced where a second terminal device transmits conflict indication information to a target terminal device when a conflict with a first SL PRS resource is detected, allowing for coordinated resource selection to avoid conflicts and improve SL PRS transmission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminal devices independently select SL PRS resources, then resource allocation flexibility is improved, but resource conflicts and interference increase
Solution Approach 1:
The patent implements a feedback mechanism where terminal devices monitor SL PRS resources and send conflict indication information to other terminal devices when conflicts are detected. This feedback loop enables dynamic resource coordination, allowing devices to adjust their resource selection based on actual interference conditions, thus resolving the contradiction between allocation flexibility and conflict avoidance
Solution Approach 2:
The patent introduces conflict indication information as an intermediary signal between terminal devices. This intermediary mechanism facilitates indirect communication about resource conflicts, enabling devices to coordinate their resource selection without direct interference, thereby maintaining flexibility while reducing harmful conflicts
2Ease of operation
If terminal devices independently select SL PRS resources, then device autonomy is improved, but hidden nodes and half-duplex issues worsen
Solution Approach 1:
The feedback mechanism allows terminal devices to maintain autonomy in resource selection while receiving information about potential hidden node problems and half-duplex conflicts from other devices. This enables autonomous operation with improved reliability through community-wide awareness of interference conditions
Solution Approach 2:
Conflict indication information serves as an intermediary that conveys reliability issues (hidden nodes, half-duplex problems) between autonomous devices, enabling them to make better autonomous decisions without compromising their operational independence
3Speed
If terminal devices independently select SL PRS resources, then selection speed is improved, but power consumption increases
Solution Approach 1:
The patent enables terminal devices to quickly select SL PRS resources from pre-configured resource pools without extensive real-time monitoring or complex calculations. This preliminary preparation of resource pools allows fast selection while reducing the need for continuous power-intensive monitoring, thus resolving the contradiction between selection speed and power consumption
Data Source
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AI summary
The present application provides a wireless communication method and apparatus. The method comprises: if a first SL PRS resource indicated by a first terminal device is in a conflict, a second terminal device sends first conflict indication information to a target terminal device, wherein the target terminal device is the first terminal device or a third terminal device, and the third terminal device is a terminal device having a sidelink transmission resource that conflicts with the first SL PRS resource.