Propagation Delay Compensation via RTT Time Difference Reporting
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Solution Overview
Problem
Current 3GPP technologies lack signaling details to support propagation delay compensation methods based on Timing Advance (TA) and Round-Trip-Time (RTT) for uplink timing alignment and positioning, respectively, on the Access Stratum (AS) layer.
Innovation Solution
A method involving user equipment (UE) and network nodes that utilize RTT-based measurement information and measurement reporting configurations to transmit and receive time difference reports, enabling propagation delay compensation by calculating RTT as the sum of UE and network node time differences, with configurable reporting configurations to optimize measurement accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RTT-based measurement information is implemented for propagation delay compensation, then time synchronization accuracy is improved, but device complexity increases due to additional signaling requirements
Solution Approach 1:
The patent reuses existing measurement reporting mechanisms and signaling structures already defined for positioning purposes, allowing the same infrastructure to serve both positioning and propagation delay compensation functions. This avoids creating entirely new signaling pathways and reduces overall system complexity.
Solution Approach 2:
The patent introduces configurable reporting configurations that allow flexible adjustment of measurement parameters such as reporting intervals, accuracy levels, and triggering conditions. This enables the system to adapt the measurement precision and signaling frequency based on specific operational requirements, optimizing the balance between accuracy and complexity.
2Measurement precision
If measurement reporting configurations are made configurable to optimize accuracy, then measurement precision is improved, but ease of operation deteriorates due to increased configuration management
Solution Approach 1:
The patent implements dynamic reporting configurations where measurement parameters can be adjusted based on current operational conditions, channel state, and service requirements. The system can transition between different reporting modes (e.g., continuous, event-triggered, periodic) without requiring complete reconfiguration, making the system adaptable while maintaining accuracy.
Solution Approach 2:
The patent includes pre-defined reporting configuration templates and default settings that are established in advance for common scenarios. These pre-configured options reduce the burden on operators by providing ready-to-use configurations that can be selected and modified as needed, rather than requiring complete customization from scratch.
Data Source
AI summary
A method (300) performed by a UE. The method includes the UE receiving a message transmitted by a network node, the message comprising RTT based measurement information and at least one measurement reporting configuration. The UE also performs at least one of: i) transmitting to the network node a first time difference report in accordance with the measurement reporting configuration, wherein the first time difference report transmitted by the UE comprises a first time difference measurement result, or ii) receiving a second time difference report transmitted by the network node, wherein the second time difference report transmitted by the network node comprises a second time difference measurement result.