Multiple-TRP Timing Advance Signaling for Uplink-Downlink Alignment
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Solution Overview
Problem
In Multiple Input Multiple Output (MIMO) Multiple Transmission Reception Points (M-TRP) systems, synchronization issues between uplink and downlink times at different TRPs cause Inter-Symbol Interference (ISI), leading to system performance loss due to misalignment of transmission delays.
Innovation Solution
A communication method that determines and sends indication information to User Equipment (UE) for specific Timing Advance (TA) information for each TRP, aligning uplink and downlink times across multiple TRPs to mitigate ISI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If TA adjustment is performed based on one TRP, then synchronization between uplink time and downlink time is achieved at that TRP, but ISI is caused for other TRPs and system performance is degraded
Solution Approach 1:
The patent divides the TA adjustment into separate operations for each TRP. Instead of using a single TA value for all TRPs, the system determines and transmits separate TA indication information for each TRP, allowing independent time alignment at each transmission point and eliminating ISI caused by misalignment at distant TRPs
Solution Approach 2:
The patent applies different TA adjustment parameters to different TRPs based on their specific locations and distances from the UE. Each TRP receives customized TA indication information tailored to its local conditions, enabling optimal time synchronization at each TRP rather than a uniform approach that compromises overall system performance
2Area of stationary object
If different TRPs are located in different geographic regions, then coverage area is expanded, but transmission delays differ and uplink-downlink time alignment fails
Solution Approach 1:
The patent introduces dynamic TA adjustment for each TRP based on its specific geographic location and distance from the UE. The TA indication information is determined according to the actual propagation delay characteristics of each TRP, allowing the system to adapt time alignment dynamically to varying geographic conditions and maintain synchronization across distributed TRPs
Data Source
AI summary
The present disclosure provides a communication method and apparatus based on Multiple Transmission Reception Points (M-TRPs), a device and a storage medium. The communication method includes: determining indication information, where the indication information is used to indicate TA information about at least two TRPs; and sending the indication information to a UE.