TRP Time and Phase Synchronization via Terminal Feedback
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Solution Overview
Problem
Existing mobile communication systems face challenges in providing efficient synchronization between base stations in network cooperative communication, which is crucial for enhancing coverage and performance in high-frequency bands like terahertz bands of 6G mobile communication technologies.
Innovation Solution
A method and device for synchronizing base stations through configuring reference signals, measuring delay and phase differences, and performing pre-compensation to achieve time and phase synchronization, enabling effective communication between multiple transmission and reception points (TRPs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If base stations perform network cooperative communication without precise synchronization, then device complexity is reduced, but time and phase synchronization accuracy deteriorates
Solution Approach 1:
The patent introduces a terminal device as an intermediary to measure and report reference signal received power and timing information from multiple base stations. The terminal acts as a mediator that collects synchronization data from base stations and provides feedback, enabling the base stations to achieve time and phase synchronization without complex direct coordination mechanisms between them.
Solution Approach 2:
The patent implements a feedback mechanism where the terminal device measures reference signals from multiple base stations, calculates timing differences and power ratios, and reports these measurements back to the base stations. This feedback loop enables the base stations to adjust their transmission parameters to achieve precise time and phase synchronization based on actual measured conditions.
2Reliability
If base stations implement precise time and phase synchronization, then data transmission reliability is improved, but system complexity increases
Solution Approach 1:
The terminal device serves as an intermediary that performs the complex measurement and calculation tasks. Instead of base stations directly coordinating with each other through complex synchronization protocols, the terminal measures reference signals from multiple base stations, determines timing differences and power ratios, and provides this information back to the base stations for adjusted transmission.
Solution Approach 2:
The system performs preliminary synchronization preparation by having the terminal device measure and report reference signal characteristics before actual data transmission. The base stations use these pre-measured timing and power information to pre-adjust their transmission parameters, ensuring synchronization is established before critical data transmission occurs.
3Area of stationary object
If base stations use multiple transmission and reception points for cooperative communication, then communication coverage is expanded, but achieving synchronization becomes more difficult
Solution Approach 1:
The terminal device acts as a central intermediary that receives reference signals from multiple transmission and reception points (TRPs) associated with different base stations. By measuring signals from all TRPs and calculating timing differences and power ratios, the terminal provides comprehensive synchronization data that accounts for the geometric relationships between multiple transmission points, enabling precise synchronization across expanded coverage areas.
Solution Approach 2:
The system dynamically adjusts transmission parameters based on measured conditions. The terminal measures reference signal received power and timing information from multiple TRPs, and this information is used to adjust transmission timing, power levels, and phase relationships of different base stations and TRPs, maintaining synchronization precision despite the complexity of multiple transmission points.
Data Source
AI summary
The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure provides a method performed by a terminal in a wireless communication system and a device for performing same, the method comprising the steps of: measuring a first reference signal transmitted from a first transmission and reception point (TRP) of a base station, and measuring a second reference signal transmitted from a second TRP; calculating a time delay difference between the first reference signal and the second reference signal; receiving, from the base station, terminal report configuration information indicating a report on the time delay difference between the first reference signal and the second reference signal; transmitting information on the time delay difference between the first reference signal and the second reference signal to the base station on the basis of the terminal report configuration information; receiving, from the first TRP and the second TRP, reference signals compensated on the basis of the information on the time delay difference between the first reference signal and the second reference signal; and receiving downlink information from the first TRP and the second TRP on the basis of the compensated reference signals.