CORESET-Based Multi-Timing Advance for Multi-TRP Uplink Alignment

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Solution Overview

Problem

Existing wireless communication systems face challenges in managing timing advance (TA) values effectively when multiple transmission/reception points (TRPs) are involved, leading to inefficiencies and potential interference in 5G New Radio (NR) networks.

Innovation Solution

Implementing a mechanism to manage multiple timing advance (TA) values for multiple TRPs, allowing for coordinated TA adjustments based on specific criteria such as wireless device capabilities and network conditions, thereby optimizing communication efficiency and reducing interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single timing advance value is used for multiple TRPs, then device complexity is reduced, but uplink signal quality deteriorates due to timing misalignment

Engineering Contradiction:

ImproveTA management complexityVSAvoiduplink signal quality

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent segments the single TA value into multiple TA values, each associated with a specific TRP. The UE is configured with multiple TA values corresponding to different TRPs, and each TA value is independently adjusted based on timing advance commands received for that specific TRP, thereby resolving the timing misalignment issue while maintaining manageable complexity through structured configuration.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by allowing different TA values to be used for different TRPs based on their specific timing requirements. Each TRP can have its own optimized TA value, enabling precise timing alignment tailored to the local characteristics of each TRP-UE link, thus improving uplink signal quality without requiring a single suboptimal TA value for all TRPs.

Inventive Principle:

Principle #3Local quality

2Reliability

If multiple timing advance values are maintained for multiple TRPs, then uplink signal quality improves through precise timing alignment, but device complexity increases

Engineering Contradiction:

Improveuplink signal qualityVSAvoidTA management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements dynamics by enabling the UE to dynamically switch between different TA values based on which TRP is currently active or has the strongest signal. The UE monitors timing advance commands from different TRPs and selectively applies the appropriate TA value, allowing adaptive timing alignment that responds to changing network conditions without requiring simultaneous maintenance of all TA values at full precision.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies partial action by maintaining full precision for multiple TA values only when necessary (e.g., when multiple TRPs are simultaneously active), while allowing some TA values to be updated less frequently or with reduced precision when their TRPs are inactive. This reduces the overall complexity burden while maintaining uplink signal quality for the active TRPs.

Inventive Principle:

Principle #16Partial or excessive action

3Measurement precision

If timing advance values are frequently updated for all TRPs, then timing accuracy is maintained, but signaling overhead and interference increase

Engineering Contradiction:

Improvetiming accuracyVSAvoidinterference

Core Design Contradiction:

Measurement precisionVSObject-generated harmful factors

Solution Approach 1:

The patent implements periodic action by updating TA values for each TRP based on periodic timing advance commands received from that TRP, rather than forcing synchronized updates for all TRPs. The UE updates the TA value for a specific TRP when a timing advance command is received for that TRP, allowing asynchronous and less frequent updates that reduce interference while maintaining timing accuracy for each active TRP connection.

Inventive Principle:

Principle #19Periodic action

4Loss of energy

If timing advance values are infrequently updated, then signaling overhead is reduced, but timing alignment accuracy deteriorates

Engineering Contradiction:

Improvesignaling overheadVSAvoidtiming alignment accuracy

Core Design Contradiction:

Loss of energyVSMeasurement precision

Solution Approach 1:

The patent applies self-service by enabling the UE to autonomously select and apply the appropriate TA value based on which TRP is currently the strongest or most active, without requiring explicit network commands for each switch. The UE monitors uplink signal quality and automatically adjusts which TA value to use, reducing signaling overhead while maintaining timing alignment accuracy through intelligent self-management of the multiple TA values.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250351150A1Multiple Timing Advance with Multiple Control Resources Sets

Publication Date: 2025.11.13 OFINNO LLC

AI summary

A wireless device receives a radio resource control (RRC) message comprising configuration parameters indicating two control resource set (CORESET) pool indexes for a downlink bandwidth part (BWP) of a cell, two timing advance groups (TAGs) for the cell, and a list of joint transmission configuration indication (TCI) states for both uplink transmissions and downlink receptions via the cell, wherein each joint TCI state in the list of joint TCI states is associated with a respective TAG among the two TAGs. The wireless device receives a second message indicating a timing advance (TA) value. The wireless device receives a control command indicating a joint TCI state from the list of joint TCI states. The wireless device transmits, using the joint TCI state, an uplink signal based on the TA value in response to the joint TCI state being associated with the TAG.