Wireless Coordination Information for Resource Selection in Sidelink
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Solution Overview
Problem
In sidelink communication, especially in mode 2 of LTE-V2X, issues such as excessive power consumption and long transmission delays arise due to half-duplex, hidden node, and resource collision, necessitating a coordination mechanism between terminal devices for resource selection and reselection, but the generation and transmission of coordination information are not adequately addressed.
Innovation Solution
A method where a first terminal generates and sends coordination information to a second terminal, either periodically or under a preset condition, to facilitate resource selection or reselection, including sets of resources expected to be used, not used, or with conflicts, to optimize resource allocation and reduce delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminal devices operate in mode 2 with autonomous resource selection, then resource allocation flexibility is improved, but power consumption increases and transmission delay lengthens due to half-duplex, hidden node, and resource collision issues
Solution Approach 1:
The patent introduces coordination information as an intermediary mechanism between terminal devices. This coordination information mediates resource selection by providing insights into resource availability and potential conflicts, enabling terminals to make better-informed decisions without continuous network intervention, thus balancing autonomy with efficiency
Solution Approach 2:
The patent implements preliminary resource assessment through coordination information exchange before actual data transmission. Terminals perform resource selection based on pre-acquired coordination information that identifies suitable resources and potential conflicts in advance, preventing resource collisions and reducing the need for retransmissions
2Adaptability or versatility
If terminal devices operate in mode 2 with autonomous resource selection, then resource allocation flexibility is improved, but transmission delay increases due to half-duplex, hidden node, and resource collision issues
Solution Approach 1:
The patent implements a feedback mechanism where terminals send coordination information to other terminals about resource availability and detected conflicts. This feedback loop enables receiving terminals to adjust their resource selection proactively, avoiding collisions and reducing retransmission delays while maintaining autonomous operation
Solution Approach 2:
The patent performs preliminary resource assessment through coordination information exchange before actual data transmission. Terminals identify suitable resources and potential conflicts in advance using coordination information, enabling conflict-free transmission and reducing delays caused by resource collisions and retransmissions
3Productivity
If coordination information is exchanged between terminal devices, then resource selection efficiency is improved, but system complexity increases due to the need for information generation and transmission protocols
Solution Approach 1:
The patent extracts only the essential coordination information needed for resource selection from the complete channel state information. By selecting and transmitting only relevant parameters (such as resource availability indicators and conflict information) rather than full channel measurements, the system reduces signaling overhead and complexity while maintaining resource selection efficiency
Data Source
AI summary
A method for wireless communication and a device are provided in embodiments of the disclosure. A first terminal generates coordination information. The first terminal sends the coordination information to a second terminal. The coordination information is used for coordinating with the second terminal to perform resource selection or resource reselection. The coordination information is generated under triggering of a preset condition, or the coordination information is sent under triggering of the preset condition.