Sidelink CSI-RS Resource Scheduling for Beam-Based Transmission
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Solution Overview
Problem
Current communication protocols have not discussed how to support beam-based transmission in sidelink systems, which is necessary for enhancing transmission rates and network coverage, especially in high-frequency bands.
Innovation Solution
Implement periodic or semi-persistent sidelink CSI-RS resources to facilitate beam-based transmission by determining optimal transmission and reception beams through CSI-RS measurements and feedback, optimizing the slot structure to include CSI-RS on specific symbols, and configuring resources using dedicated parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beam-based transmission is adopted to enhance transmission rate, then spectral efficiency is improved, but protocol complexity increases as current protocols have not yet discussed how to support beam-based transmission
Solution Approach 1:
The patent performs preliminary actions by pre-configuring CSI-RS resources with beam information before actual data transmission. The network side device configures multiple CSI-RS resources corresponding to different beams, and the terminal device stores this configuration information. This preliminary setup enables the terminal to quickly select appropriate beams for transmission without requiring complex real-time protocol negotiations, thus improving transmission rate while controlling protocol complexity.
Solution Approach 2:
The patent implements feedback mechanisms where the terminal device measures CSI-RS resources and reports beam information back to the network side device. Based on this feedback, the network can dynamically adjust beam selection and configuration. This feedback loop enables adaptive beam management that improves transmission efficiency while maintaining manageable protocol complexity through standardized feedback procedures.
2Measurement precision
If periodic or semi-persistent CSI-RS resources are configured to enable beam-based transmission, then beam selection accuracy is improved, but resource allocation complexity increases
Solution Approach 1:
The patent segments the beam management process into distinct phases: configuration phase (where network side device configures multiple CSI-RS resources corresponding to different beams), measurement phase (where terminal device measures configured resources), and selection phase (where terminal selects appropriate beams based on measurements). This segmentation allows each phase to be optimized independently, improving beam selection accuracy through dedicated measurement resources while managing overall complexity through structured resource allocation.
Solution Approach 2:
The patent utilizes parameter changes by configuring CSI-RS resources with varying parameters such as periodicity, semi-persistent activation, and beam directionality. The network side device can adjust these parameters to optimize beam selection accuracy for different operational scenarios. For example, using periodic CSI-RS for initial beam acquisition and semi-persistent CSI-RS for beam refinement, thereby improving measurement precision while controlling resource allocation complexity through parameter optimization.
Data Source
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AI summary
Provided is a method and terminal device for sidelink transmission. The method includes: a first terminal device or a second terminal device determining a first CSI-RS resource; the first CSI-RS resource is a periodic or semi persistent sidelink CSI-RS resource; the first terminal device is configured to send CSI-RS, and the second terminal device is configured to receive CSI-RS. The present embodiment proposes to determine periodic or semi persistent sidelink CSI-RS resources in a sidelink system, which helps the sidelink system achieve beam based transmission.