Rx-Tx RTT Estimation Using Shared PUSCH Signaling
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Solution Overview
Problem
The challenge in 5G wireless communication systems is the inefficient and costly signaling overhead in Rx-Tx round trip time (RTT) estimation procedures, particularly for propagation delay compensation, which affects time synchronization accuracy, especially in scenarios with tight Uu interface requirements.
Innovation Solution
A method and apparatus that combines the transmission of a reference signal with the Rx-Tx measurement report in a single shared channel, such as PUSCH, to reduce signaling overhead while maintaining accuracy, using techniques like delta Rx-Tx signaling and intra-symbol offset reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate signaling channels are used for reference signal transmission and Rx-Tx measurement reporting, then measurement accuracy is maintained, but signaling overhead and costs increase
Solution Approach 1:
The patent combines the reference signal transmission and Rx-Tx measurement report into a single shared channel (PUSCH). The network element transmits both the reference signal and the measurement report together, reducing the number of separate signaling operations and lowering overall signaling overhead while preserving measurement accuracy through integrated processing
2Reliability
If multiple separate signaling operations are used for RTT estimation, then measurement reliability is improved, but time consumption and procedure complexity increase
Solution Approach 1:
The network element performs preliminary processing of the reference signal and measurement data before combining them in the shared channel. By preparing and integrating the measurement report with the reference signal in advance, the procedure reduces overall execution time while maintaining reliability through pre-validated measurement processes
3Reliability
If traditional separate channel signaling is used, then signal integrity is preserved, but resource efficiency and cost decrease
Solution Approach 1:
The shared channel (PUSCH) is designed to perform multiple functions simultaneously: transmitting reference signals, carrying measurement reports, and enabling RTT estimation all in one signaling operation. This multi-functional approach improves resource efficiency and reduces costs while preserving signal integrity through unified channel management and processing
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for Rx-Tx RTT estimation are provided. One method may include transmitting, by a network element, the reference signal to another network element and recording a time stamp (t0) of a time of transmission of the reference signal, and receiving an estimated Rx-Tx measurement from said another network element and recording a time stamp (t3) of a time of receipt of the estimated Rx-Tx measurement. The method may also include calculating a Rx-Tx measurement at the network element based on a difference between the time stamp (t0) of the time of transmission of the reference signal and the time stamp (t3) of the receipt of the estimated Rx-Tx measurement, and determining a propagation delay based on a difference between the received estimated Rx-Tx measurement and the calculated Rx-Tx measurement.