Uplink Timing Advance Selection for Multi-TRP Reception
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Solution Overview
Problem
In multi-transmission reception point scenarios, using the same timing advance for uplink transmissions between user equipment and different TRPs can lead to incorrect reception of signals.
Innovation Solution
The user equipment determines different timing advances based on timing and network nodes, adjusting uplink transmissions accordingly to ensure correct reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same timing advance is used for uplink transmission between UE and different TRPs, then the system complexity is reduced, but the uplink transmission cannot be received correctly
Solution Approach 1:
The patent segments the timing advance parameter into multiple independent timing advance values, each corresponding to a specific TRP. When the UE switches between TRPs, it selects the appropriate timing advance value from the set based on the target TRP, ensuring accurate uplink synchronization with each specific TRP while maintaining manageable system complexity through structured parameter organization.
Solution Approach 2:
The patent applies local quality by configuring different timing advance values for different TRPs based on their specific geometric relationships with the UE. Each TRP receives a tailored timing advance value that compensates for its specific propagation delay, ensuring optimal uplink reception quality for each local transmission point rather than using a uniform global value.
2Reliability
If different timing advances are determined for different network nodes, then the uplink transmission reliability is improved, but the device complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple timing advance values in the UE before TRP switching occurs. The network node provides the set of timing advance values corresponding to different TRPs in advance, and the UE stores them for immediate selection when switching is required, eliminating the need for real-time calculation and reducing operational complexity during actual TRP transitions.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network node acts as a mediator to manage and distribute the appropriate timing advance values to the UE. The network node maintains the mapping between TRPs and their corresponding timing advance values, providing a simplified interface to the UE that reduces the complexity burden on the user equipment while ensuring reliable timing synchronization.
Data Source
AI summary
The present disclosure provides an uplink transmission method, device, equipment, system, and a storage medium, which can solve the problem that in a multiple transmission scenario, uplink transmission of a UE may not be correctly received. The method includes: determining a timing advance according to a timing and/or network nodes; and performing uplink transmission with the network nodes according to the timing advance.