Threshold-Based Sidelink RSRP Reporting for Accurate Channel Feedback
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Solution Overview
Problem
The current LTE system does not support accurate reporting of Sidelink (SL) Reference Signal Received Power (RSRP) measurements, leading to discrepancies between terminal and network measurements, which is a limitation for advanced V2X services in the 5G NR system.
Innovation Solution
A method for reporting RSRP on a sidelink is introduced, where a first terminal device sends configuration information for sidelink RSRP to a second terminal device, which then reports the measurement result back to the first terminal device, enabling the first terminal device to adjust sending parameters based on the latest channel state information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional V2X SL transmission is used in NR system, then the system can maintain interface simplicity, but the RSRP measurement result reported by terminal differs from actual sidelink RSRP measurement result
Solution Approach 1:
The patent introduces a network device as an intermediary to coordinate sidelink RSRP measurement and reporting. The network device configures measurement parameters, receives reported results, and manages the measurement process, ensuring accurate RSRP measurement while maintaining system simplicity through centralized control.
2Reliability
If LTE SL broadcast communication is used, then the system can ensure basic safety communication, but it cannot support advanced V2X services with strict QoS requirements
Solution Approach 1:
The patent enables dynamic adaptation of sidelink communication by allowing terminal devices to perform RSRP measurements and report results based on configured parameters. This dynamic measurement and reporting mechanism allows the system to adapt to different V2X service requirements, transitioning from static broadcast communication to dynamic, QoS-aware communication.
3Ease of operation
If periodic reporting configuration is applied to NR SL, then the system can maintain reporting simplicity, but the RSRP measurement result does not reflect actual sidelink channel state
Solution Approach 1:
The patent implements a feedback mechanism where terminal devices measure sidelink RSRP, report results to the network device, and receive configurations based on channel conditions. This closed-loop feedback ensures that periodic reporting accurately reflects actual channel state while maintaining operational simplicity through automated network-controlled configurations.
Data Source
AI summary
A first terminal device, a second terminal device, and a network device are provided. The first terminal device includes a processor and a memory storing computer instructions, when executed by the processor, cause the first terminal device to perform operations including: sending configuration information for a sidelink reference signal received power (RSRP) to a second terminal device, where the configuration information for the sidelink RSRP includes a threshold for RSRP reporting and a time interval for an RSRP measurement; and receiving a measurement result of an RSRP reported by the second terminal device when the measurement result of the RSRP reaches the threshold for RSRP reporting and remains above the threshold for RSRP reporting within the time interval for the RSRP measurement.