SRS Timing Offset Mapping for Accurate 5G NR Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing 5G NR positioning technologies face inaccuracies due to varying transmit timing offsets across different antenna panels or chains in user equipment (UE), leading to errors in uplink time difference of arrival (UL TDOA) and multi-round trip time (multi-RTT) measurements.
Innovation Solution
Implementing a higher layer parameter to associate Sounding Reference Signal (SRS) resources with specific transmit timing offsets, allowing TRPs to adjust calculations and account for these offsets, thereby improving positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If SRS resources are transmitted using multiple antenna panels or chains with different transmit timing offsets, then the UE can perform positioning measurements with multiple TRPs, but positioning accuracy deteriorates due to timing offset variations
Solution Approach 1:
The patent introduces a higher layer parameter that explicitly indicates the transmit timing offset value for each SRS resource. This parameter allows the network to configure and communicate timing offset information to the UE, enabling the UE to compensate for timing variations when performing positioning measurements across multiple antenna panels or chains, thereby resolving the accuracy deterioration caused by timing offset variations
2Measurement precision
If transmit timing offsets are not compensated, then the system operation is simpler, but positioning measurement accuracy deteriorates
Solution Approach 1:
The patent introduces a higher layer parameter as an intermediary that carries transmit timing offset information from the network to the UE. This parameter acts as a mediator that enables timing offset compensation without requiring complex real-time synchronization mechanisms or additional signaling protocols, thus improving measurement accuracy while maintaining relatively simple system operation
Data Source
AI summary
A UE receives configuration information for transmission of Sounding Reference Signal (SRS) resources for positioning to be associated with a higher layer parameter, which has a plurality of values respectively corresponding to a plurality of transmit (Tx) timing offsets of the UE. The UE transmits SRS resources for positioning associated with the higher layer parameter according to the configuration information to a plurality of TRPs. The plurality of values of the higher layer parameter are used for calculating positioning measurements between the UE and the plurality of TRPs based on the plurality of Tx timing offsets of the UE, and the calculated positioning measurements are used for determining the position of the UE.