Sidelink CSI-RS Resource Configuration for Accurate Channel Feedback
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Solution Overview
Problem
Sidelink communication in wireless networks faces poor reliability due to the lack of effective resource indications and information interaction between user equipment (UEs), making accurate channel measurement and feedback impossible.
Innovation Solution
A method and device for sending and receiving channel state information reference signals (CSI-RS) between UEs, using configured or pre-configured resources within a sidelink resource pool, with indication information to ensure accurate channel measurement and feedback, improving communication reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If sidelink communication is implemented without network side forwarding, then power consumption is reduced and data rate requirements are met, but channel measurement accuracy and communication reliability deteriorate
Solution Approach 1:
The patent introduces channel state information reference signals (CSI-RS) as an intermediary mechanism between transmitting and receiving UEs. These reference signals enable the receiving UE to measure and evaluate channel quality, which is then fed back to the transmitting UE for adaptive modulation and coding decisions, thereby improving communication reliability without requiring network side forwarding
Solution Approach 2:
The patent implements a feedback mechanism where the receiving UE measures channel quality based on CSI-RS and feeds back channel state information to the transmitting UE. This feedback loop enables the transmitting UE to adjust transmission parameters dynamically, improving reliability while maintaining direct sidelink communication and low power consumption
2Productivity
If direct sidelink transmission is used, then network burden is reduced, but channel measurement and information interaction between UEs deteriorate
Solution Approach 1:
The patent employs preliminary action by pre-configuring CSI-RS resources and channel measurement configurations before actual data transmission. The transmitting UE sends CSI-RS in advance, allowing the receiving UE to perform channel measurements and prepare feedback information, thereby enabling accurate channel assessment in direct sidelink transmission without network intervention
Solution Approach 2:
CSI-RS serves as an intermediary signal that facilitates channel measurement between UEs. These reference signals provide a known structure that the receiving UE can use to estimate channel characteristics, enabling precise channel measurement and information interaction in direct sidelink communication while reducing network burden
Data Source
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AI summary
Provided are a signal sending method and device, a signal receiving method and device, an information feedback method and device, a communication node, and a medium. The method includes: acquiring configuration information of sidelink reference signal resources; and sending a channel state information reference signal on a sidelink data channel according to the configuration information, and indicating first indication information through sidelink control information.