NB-IoT UE Path Loss Determination via Autonomous Filter Coefficients
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Solution Overview
Problem
In NB-IoT networks, the existing power control methods increase the load on base stations and UE, leading to higher power consumption and retransmission due to the need for frequent configuration information exchange and poor channel quality, which is inefficient and resource-intensive.
Innovation Solution
The method eliminates the need for real-time transmission of higher layer filter coefficients from the base station to UE, allowing UE to determine its own filter coefficients based on preset parameters, reducing system signaling overhead and power consumption, and directly estimating path loss using downlink reference signal power and measurement values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the base station sends configuration information bearing preset higher layer filter coefficients to the UE in real time, then the measurement accuracy of the UE is improved, but the system signaling overhead and power consumption are increased
Solution Approach 1:
The UE autonomously determines the higher layer filter coefficient based on its own measurement of downlink reference signal power and path loss calculation, without requiring the base station to send configuration information. This self-service approach eliminates the need for continuous signaling exchange while maintaining measurement accuracy, thereby reducing power consumption at both the base station and UE.
2Measurement precision
If the base station sends configuration information bearing preset higher layer filter coefficients to the UE in real time, then the measurement accuracy of the UE is improved, but the system signaling overhead is increased
Solution Approach 1:
The patent extracts the higher layer filter coefficient determination process from the base station's control signaling and relocates it to the UE's autonomous calculation. By taking out the configuration information transmission from the system signaling, the patent eliminates the associated signaling overhead while the UE maintains accurate measurement through its own path loss-based coefficient determination.
3Measurement precision
If the base station frequently retransmits configuration information due to poor channel quality, then the UE can maintain accurate measurements, but the system resources are wasted and power consumption increases
Solution Approach 1:
The UE independently determines the higher layer filter coefficient based on current channel conditions and path loss calculations, without relying on base station retransmissions. This self-service mechanism eliminates the need for repeated configuration information transmission, thereby improving system resource efficiency while maintaining measurement accuracy through adaptive coefficient adjustment.
4Adaptability or versatility
If the UE continuously detects configuration information transmitted by the base station, then the UE can update its filter coefficients, but the power consumption of the UE is increased
Solution Approach 1:
The UE performs autonomous determination of the higher layer filter coefficient using its own measurement capabilities and path loss calculations, eliminating the need to continuously detect and process base station transmissions. This self-service approach maintains adaptability through real-time coefficient updates while significantly reducing UE power consumption by removing the continuous reception and processing requirement.
Data Source
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AI summary
The present disclosure provides a path loss determination method and apparatus. The method is applied to User Equipment (UE), the UE being a narrowband Internet of Things (NB-IoT) device. The method includes: determining transmission power of a downlink narrowband reference signal (NRS); determining a measurement value of narrowband reference signal received power (NRSRP); and where a preset higher layer filter parameter is not received from a base station, determining path loss between the base station and the UE according to the transmission power of the downlink NRS and the measurement value of the NRSRP. By using the path loss determination method provided by the present disclosure, during the determination of transmission power of UE, a configuration information sending burden of a base station may be reduced, unnecessary retransmission may be avoided, and power consumption of the UE in the NB-IoT may be reduced.