Wireless Measurement Configuration for Coverage Enhancement
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Solution Overview
Problem
In wireless communication systems, particularly in LTE networks, user equipment (UE) faces inefficiencies in battery consumption and measurement processes during inter-frequency cell reselection, as it must continuously measure all neighbor frequencies without considering frequency priority, leading to unnecessary energy expenditure.
Innovation Solution
A method and apparatus for UE to determine a coverage enhancement (CE) level based on reference signal received power (RSRP) and reference signal received quality (RSRQ), allowing it to apply a measurement activity configuration that includes parameters such as measurement duration, inactivity duration, and repetition period to optimize measurements, thereby reducing unnecessary measurements during inactivity periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a UE continuously performs measurements for all neighbor frequencies during inter-frequency cell reselection, then measurement accuracy and cell reselection reliability are improved, but battery consumption increases
Solution Approach 1:
The patent implements periodic measurement actions by introducing measurement activity configurations that define specific measurement windows and inactivity periods. Instead of continuous measurement, the UE performs measurements periodically during designated activity windows, then enters low-power inactivity periods. This periodic action maintains measurement capability while significantly reducing battery consumption compared to continuous measurement approaches.
Solution Approach 2:
The patent introduces dynamic measurement configurations that can be adjusted based on UE state and network conditions. The measurement activity configuration includes parameters such as measurement duration, inactivity duration, and repetition period that can be dynamically modified by the network. This dynamic approach allows the system to optimize between measurement reliability and energy consumption based on current operational requirements.
2Measurement precision
If a UE performs measurements for all neighbor frequencies without frequency priority consideration, then measurement completeness is improved, but measurement time and processing overhead increase
Solution Approach 1:
The patent structures measurements into periodic activity windows where the UE performs measurements on configured neighbor frequencies. During these periodic measurement opportunities, the UE measures all required frequencies to maintain completeness. The periodic structure ensures that despite measuring all frequencies, the total time spent is limited and controlled, preventing excessive measurement time accumulation.
Solution Approach 2:
The network provides preliminary measurement configurations to the UE before measurements begin. These configurations include measurement activity windows, frequency lists, and parameter settings that prepare the UE for efficient measurement execution. By pre-configuring measurement parameters and frequency priorities, the UE can execute measurements more efficiently without sacrificing completeness.
Data Source
AI summary
Provided is a method for a terminal performing a measurement in a wireless communication system, and a device supporting same. The terminal comprises: determining a coverage enhancement (CE) level thereof; receiving a legacy measurement configuration and a measurement activity configuration; and on the basis of the determined CE level, performing a measurement according to any one of the legacy measurement configuration or the measurement activity configuration, wherein the legacy measurement configuration may be a measurement configuration applying to a terminal in a normal coverage region, and the measurement activity configuration may be a measurement configuration applying to a terminal in a CE region.