Sidelink CSI Acquisition via Triggered Reference Signals
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently acquiring Channel Status Information (CSI) on sidelink communications, particularly in determining and indicating measurement resources, triggering CSI measurements and reporting, and determining reporting resources.
Innovation Solution
The proposed solution involves an apparatus and method for CSI acquisition on sidelink, which includes a transmitter that sends a reference signal, a receiver that receives a channel quality report, and a processor that controls the transmitter and receiver. The processor is configurable to support reporting activation schemes and measurement triggering schemes, allowing for efficient CSI acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CSI reporting is continuously monitored and measured on sidelink, then channel quality information is readily available for communication optimization, but system overhead and resource consumption increase significantly
Solution Approach 1:
The patent implements periodic CSI reporting where the transmitting device sends CSI reports at configured intervals rather than continuously. The network can configure the reporting periodicity and trigger conditions, allowing the receiving device to measure and report channel quality only at specific periods when triggered by downlink control information or uplink grants, thus reducing system overhead while maintaining reliable channel quality information availability
Solution Approach 2:
The receiving device autonomously measures channel quality on configured uplink resources and generates CSI reports without requiring continuous network intervention. The device self-manages the measurement and reporting process based on pre-configured parameters, reducing network overhead while ensuring channel quality information is captured and reported when needed
2Measurement precision
If multiple CSI measurement resources are configured for comprehensive channel assessment, then measurement precision improves, but device complexity and configuration overhead increase
Solution Approach 1:
The patent divides CSI measurement resources into multiple separate configurations, each targeting specific channel conditions or transmission scenarios. Instead of a single complex measurement configuration, multiple simpler resource configurations are provided, allowing the device to select appropriate resources based on current channel conditions, thereby improving measurement precision without excessive device complexity
Solution Approach 2:
The patent enables dynamic selection and activation of CSI measurement resources based on current communication conditions. The network can activate or deactivate specific measurement resources through control signaling, allowing the device to adaptively use appropriate measurement configurations for different channel scenarios, improving precision while managing complexity through dynamic rather than static configuration
Data Source
AI summary
Apparatus and methods of Channel Status Information (CSI) acquisition on sidelink are disclosed. The apparatus includes: a transmitter that transmits a reference signal to a device on a sidelink (SL) transmission; a receiver that receives a channel quality report from the device; and a processor that controls the transmitter and the receiver, and decodes the channel quality report to obtain a channel quality; wherein the processor is configurable to support one or a combination selected from a group consisting of: a reporting activation scheme where an SL Channel Status Information (CSI) reporting activation indicator is configured; and a measurement triggering scheme where the transmitter initiates transmission of the reference signal upon satisfying a triggering condition.