Relay Load Information Determination for Sidelink Selection
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Solution Overview
Problem
In communication networks, particularly in LTE and NR systems, there is a need for efficient relay load information determination and selection to optimize sidelink relay operations, especially in scenarios like V2X services and National Security and Public Safety (NSPS) where network coverage is limited or absent, and relay load criteria are not effectively defined to ensure reliable and efficient data transmission.
Innovation Solution
A method to obtain and transmit relay load information, including free bandwidth, achievable bit rate, and available sidelink resources, to enable terminal devices to select the most suitable relay based on defined criteria, such as capacity ratios and quality of service requirements, ensuring efficient data transmission even without network coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay selection is performed without relay load information, then relay selection can be made quickly, but the reliability of data transmission is reduced
Solution Approach 1:
The relay load information is obtained and transmitted in advance before relay selection is performed. The first terminal device determines its relay load information (including free bandwidth, achievable bit rate, and available sidelink resources) and transmits this information to the second terminal device beforehand, enabling the second device to make an informed relay selection decision without delay.
Solution Approach 2:
Relay load information acts as an intermediary parameter that mediates between the relay device and the selecting device. This information serves as a criterion that bridges the gap between quick selection and reliable transmission by providing a quantifiable metric (relay load) that can be quickly evaluated while ensuring transmission reliability.
2Measurement precision
If relay load information is obtained and transmitted, then relay selection accuracy is improved, but device complexity increases
Solution Approach 1:
The relay load information is segmented into distinct components: free bandwidth, achievable bit rate, and available sidelink resources. Each component represents a specific aspect of relay capacity, allowing for structured transmission and evaluation without requiring complex integrated assessments.
Solution Approach 2:
The patent transforms the abstract concept of relay load into concrete, measurable parameters (free bandwidth, achievable bit rate, available sidelink resources). By changing the representation from qualitative to quantitative parameters, the system achieves precise relay selection while maintaining manageable device complexity through standardized measurements.
3Reliability
If comprehensive relay load criteria are used, then transmission quality is improved, but the complexity of relay selection process increases
Solution Approach 1:
The relay load information structure serves multiple functions simultaneously: it characterizes relay capacity, enables selection decision-making, and provides a basis for quality assessment. This multi-functional approach consolidates what could be multiple separate evaluation processes into a single comprehensive mechanism, reducing overall process complexity.
Data Source
AI summary
Embodiments of the present disclosure provide method and apparatus for relay load information determination and relay selection. A method performed by a first terminal device includes obtaining relay load information of the first terminal device. The method further includes transmitting the relay load information of the first terminal device to a second terminal device.