Terminal Device Movement Status Detection via Multi-Directional Reference Signals
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Solution Overview
Problem
Terminal devices face challenges in accurately determining their movement status, leading to incorrect measurement decisions and affected communication services due to difficulties in assessing signal quality changes, especially when moving laterally or circularly around a base station.
Innovation Solution
A method that determines the terminal device's movement status based on the signal quality of reference signals, allowing for the application of a relaxed measurement rule that reduces power consumption by skipping or modifying signal measurements, such as intra-frequency or inter-frequency measurements, based on specific conditions related to signal quality thresholds and durations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the terminal device determines movement status based on signal quality of serving cell, then power consumption is reduced by skipping measurements, but measurement accuracy deteriorates leading to wrong movement status determination
Solution Approach 1:
The patent segments the measurement process by introducing multiple reference signals with different sending directions. Instead of using a single serving cell signal, the terminal device measures multiple reference signals (e.g., CSI-RS, SS/PBCH block) from different directions to determine movement status. This segmentation improves measurement accuracy while allowing the device to skip unnecessary measurements when the relaxed measurement rule applies, thus balancing power consumption and accuracy.
2Use of energy by moving object
If the terminal device skips intra-frequency or inter-frequency measurement to save power, then power consumption is reduced, but communication service quality deteriorates due to inability to perform cell reselection
Solution Approach 1:
The patent implements a dynamic measurement strategy where the terminal device adjusts its measurement behavior based on determined movement status. When the device is determined to be stationary or moving slowly (relaxed measurement rule applies), it skips intra-frequency and inter-frequency measurements to save power. When movement is detected (relaxed measurement rule does not apply), the device performs normal measurements to ensure timely cell reselection and maintain communication service quality. This dynamic approach balances power consumption and service reliability.
3Device complexity
If the terminal device uses single-direction reference signal for movement determination, then device complexity is reduced, but measurement precision deteriorates due to inability to detect lateral or circular movement
Solution Approach 1:
The patent adds a directional dimension to movement detection by introducing reference signals with different sending directions. Instead of relying on a single serving cell signal, the terminal device measures multiple reference signals from different directions (e.g., different beams or spatial directions). By comparing signal quality across these directions, the device can accurately detect lateral movement, circular movement, and other movement patterns that single-direction measurement would miss, thereby improving measurement precision without significantly increasing device complexity.
Data Source
AI summary
A communication method includes determining, by a processor, that a terminal device meets a first condition based on the signal quality of at least one reference signal of a serving cell of the terminal device. The at least one reference signal corresponds to at least one sending direction. The method also includes skipping performing an intra-frequency measurement or an inter-frequency measurement.