D2D Relay Signal Measurement Using CRC-Validated Sidelink Signals
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively measuring Device-to-Device (D2D) signals and selecting a suitable relay UE, which affects resource utilization and signal transmission efficiency in D2D communication.
Innovation Solution
A method and apparatus for a UE to receive and measure D2D signals from multiple relay UEs, filtering results based on valid Cyclic Redundancy Check (CRC) and calculating the average received power of Demodulation Reference Signal (DMRS) Resource Elements (REs) of Physical Sidelink Discovery Channels (PSDCHs, with the option to select a relay UE based on these measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If D2D signals are measured from all relay UEs without filtering, then measurement coverage is improved, but resource waste increases due to invalid measurements
Solution Approach 1:
The patent extracts and processes only valid D2D signals by checking CRC before measurement. Invalid signals are filtered out early in the process, preventing waste of measurement resources on corrupted data while ensuring only reliable signals contribute to the measurement results.
Solution Approach 2:
The patent performs preliminary CRC validation on received D2D signals before conducting measurements. This preliminary action ensures that only signals with valid integrity checks are subjected to measurement processing, eliminating resource waste on invalid signals while maintaining measurement coverage for all legitimate signals.
2Reliability
If filtering is applied to all measurement results, then measurement reliability is improved, but processing complexity increases
Solution Approach 1:
The patent applies filtering selectively based on signal validity rather than uniformly to all measurements. The filtering operation is applied locally only to measurements derived from signals with valid CRC, while invalid signals are excluded beforehand. This approach maintains measurement reliability without the overhead of processing and filtering all measurements.
Solution Approach 2:
The patent extracts and processes only valid measurement results by filtering out measurements from signals with invalid CRC. This selective extraction approach improves measurement reliability by excluding corrupted measurements while reducing processing complexity compared to applying filtering operations to all measurements regardless of validity.
3Measurement precision
If relay UE selection is based on comprehensive signal measurements, then selection accuracy is improved, but measurement time increases
Solution Approach 1:
The patent extracts and processes only valid D2D signals for relay UE selection by checking CRC beforehand. This extraction of valid signals from the complete set of received signals ensures that selection accuracy is based on reliable measurements only, while reducing measurement time by excluding invalid signals from the measurement process.
Solution Approach 2:
The patent performs preliminary CRC validation on all received D2D signals before conducting measurements. This preliminary action identifies valid signals in advance, allowing the system to focus measurement resources only on signals that will contribute to accurate relay UE selection, thereby improving selection accuracy while reducing overall measurement time.
Data Source
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AI summary
An embodiment of the present invention relates to a method for performing measurement by a terminal in a wireless communication system, the method comprising the steps of: receiving D2D signals transmitted by a plurality of relay terminals; and performing measurement using at least one signal among the D2D signals, wherein the D2D signal subjected to the measurement is a D2D signal having a valid CRC.