Uplink Delay Measurement via Reference Path Mediator
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Solution Overview
Problem
Current commercial base stations and terminal devices face inefficiencies in maintaining consistent time references, leading to challenges in measuring transmission delay, especially when the terminal device's transmission power is low, resulting in high resource overhead due to the need for multiple uplink reference signals to improve signal noise ratio.
Innovation Solution
A method that involves acquiring a downlink reference signal to determine a line of sight (LOS) path and a reference path, calculating a reference delay difference, and using this difference to obtain the uplink transmission delay of the LOS path with only one uplink reference signal, reducing resource overhead by eliminating the need for direct measurement and increasing signal power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device consecutively transmits multiple uplink reference signals to improve the signal noise ratio, then the signal noise ratio is improved, but the resource overhead increases
Solution Approach 1:
The patent introduces a reference path as an intermediary to indirectly obtain the uplink transmission delay of the LOS path. Instead of directly measuring the LOS path multiple times, the terminal measures the reference path once and uses the pre-acquired reference delay difference to calculate the LOS path delay, thus reducing resource overhead while maintaining measurement reliability
Solution Approach 2:
The terminal device pre-acquires the reference delay difference between the LOS path and reference path during the downlink phase. This preliminary measurement allows the uplink LOS path delay to be calculated from a single reference signal measurement, eliminating the need for multiple uplink transmissions and reducing resource overhead
2Reliability
If the terminal device increases transmission power to improve signal quality, then the signal quality is improved, but the energy consumption increases
Solution Approach 1:
The patent applies partial action by measuring only the reference path in the uplink direction, which has sufficient signal quality, rather than measuring the LOS path directly multiple times or with high power. The reference delay difference obtained from the downlink phase compensates for the partial measurement, achieving accurate LOS path delay with reduced energy consumption
3Measurement precision
If the terminal device transmits more uplink reference signals to detect the LOS path, then the measurement accuracy is improved, but the time consumption increases
Solution Approach 1:
The reference path serves as a mediator that can be measured quickly in the uplink direction. By measuring the reference path once and using the pre-acquired reference delay difference, the terminal obtains the LOS path delay without needing to perform multiple time-consuming direct measurements of the LOS path in the uplink
Data Source
AI summary
A transmission delay measurement method, a positioning method, a terminal, a base station and a storage medium are disclosed. The method may include acquiring a downlink reference signal sent by a base station, and determining a LOS path and a reference path from a plurality of transmission paths of the downlink reference signal; acquiring a reference delay difference that is a difference between a downlink transmission delay of the LOS path and the downlink transmission delay of reference path; sending an uplink reference signal to the base station, to cause the base station to obtain an uplink transmission delay of reference path based on the uplink reference signal; and reporting the reference delay difference to the base station, to cause the base station to obtain the uplink transmission delay of LOS path based on the uplink transmission delay of reference path and reference delay difference.