TRP-Level Timing Advance Adjustment for Multi-TRP Interference
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Solution Overview
Problem
Conventional communication systems face limitations in timing advance adjustment, which can lead to interference when terminal devices communicate with multiple transmitting and receiving points (TRPs) within a serving cell.
Innovation Solution
A communication method where a network device sends first information to a terminal device, indicating timing advances (TAs) specific to one or more TRPs, allowing for precise TA adjustments based on TRP granularity rather than serving cell granularity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If timing advance adjustment is performed by using a timing advance group (TAG) as granularity with one TAG corresponding to one serving cell, then the system structure is simple and easy to implement, but timing precision is insufficient leading to interference when terminal devices communicate with multiple TRPs
Solution Approach 1:
The patent divides the timing advance group (TAG) into individual TRP-level timing advance adjustments. Instead of using one TAG per serving cell, the system now assigns separate timing advance parameters to each TRP, enabling independent timing control for multiple TRPs within the same serving cell. This segmentation resolves the contradiction by providing TRP-level precision while maintaining the existing TAG framework through a one-to-many mapping relationship between TAGs and TRPs.
2Object-generated harmful factors
If one TAG corresponds to one serving cell, then the configuration is simple, but interference occurs when terminal devices communicate with multiple TRPs within a serving cell
Solution Approach 1:
The patent segments the timing advance control at the TRP level rather than serving cell level. Each TRP receives its own timing advance parameter, allowing the terminal device to apply different timing adjustments for different TRPs. This eliminates interference caused by using a unified TAG for multiple TRPs while maintaining configuration simplicity through the one-to-many mapping between TAGs and TRPs.
Solution Approach 2:
The patent implements local timing advance quality by assigning individual timing advance parameters to each TRP. Instead of applying a uniform timing advance across all TRPs in a serving cell, the system now provides TRP-specific timing adjustments tailored to each TRP's location and characteristics. This local quality approach eliminates interference while keeping the configuration mechanism relatively simple through inheritance from TAG-level settings.
Data Source
AI summary
A communication method, a terminal device, and a network device are provided. The method includes: receiving, by a terminal device, first information, where the first information is used to indicate TAs of one or more TRPs. In this application, the first information is introduced to indicate the TAs of the one or more TRPs, that is, a TA is indicated by using a TRP as a granularity.