NR-V2X Resource Selection via Intermediary Coordination
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Solution Overview
Problem
In NR-V2X systems, existing resource selection methods face issues such as hidden nodes and half-duplex problems, which lead to interference and reduced reliability in resource allocation.
Innovation Solution
A method where a first terminal device determines a target resource set and sends indication information to a second terminal device, allowing it to perform resource reselection and avoid conflicting resources, thereby improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminal devices select transmission resources randomly or according to listening results in a resource pool, then resource allocation flexibility is improved, but reliability of resource selection deteriorates due to hidden node and half-duplex problems
Solution Approach 1:
The patent introduces a network device as an intermediary that coordinates resource selection between terminal devices. The network device receives resource selection information from terminals, determines appropriate target resource sets, and allocates resources centrally. This mediator approach resolves the hidden node and half-duplex problems by enabling centralized control while maintaining terminal autonomy in resource selection, thus improving reliability without sacrificing flexibility.
Solution Approach 2:
The patent implements a feedback mechanism where terminal devices send resource selection information to the network device, which then provides resource allocation decisions back to the terminals. This closed-loop feedback system allows the network to monitor resource usage patterns, detect potential conflicts (hidden nodes), and adjust allocations dynamically, thereby improving resource selection reliability while preserving terminal device adaptability.
2Device complexity
If terminal devices perform autonomous resource selection without coordination, then device complexity is reduced, but harmful factors increase due to interference from hidden nodes and half-duplex conflicts
Solution Approach 1:
The network device serves as an intermediary that handles the complex coordination tasks between terminals. Terminals simply report their resource selection intentions to the network, which then resolves conflicts and provides final allocations. This approach keeps terminal device complexity low while the network device manages the harmful interactions caused by hidden nodes and half-duplex conflicts through centralized coordination.
Solution Approach 2:
The network device performs preliminary analysis of resource selection information from multiple terminals before final allocation. By proactively identifying potential hidden node conflicts and half-duplex issues in the resource selection phase, the network can prevent these harmful factors before they manifest as interference, rather than reacting to problems after they occur.
Data Source
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AI summary
Embodiments of the present application provide a method for determining a resource set and a terminal device, which can avoid problems such as a hidden node, half-duplex and the like occurring in resource selection, thereby improving reliability of the resource selection. The method for determining a resource set includes: determining, by a first terminal device, a target resource set; sending, by the first terminal device, the target resource set to a second terminal device, or sending, by the first terminal device, first indication information to a second terminal device according to the target resource set; where the target resource set is used for the second terminal device to determine a candidate transmission resource, and the first indication information is used for indicating the second terminal device to perform resource reselection.