Unified Timing Advance Command for Multi-TRP Uplink Alignment

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Solution Overview

Problem

Current wireless communication systems face inefficiencies in multiple timing advances during multi-TRP operations, leading to performance degradation in uplink time alignment and signaling.

Innovation Solution

Enhancements to the uplink time alignment processes and signaling in multi-TRP operations by configuring timing advance commands and timers to synchronize and adjust uplink transmissions to multiple transmit/receive points (TRPs) effectively, using mechanisms like Timing Advance Commands and timers to maintain synchronization across TRPs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If multiple timing advance commands are used for multi-TRP operations, then uplink time alignment accuracy is improved, but signaling complexity and overhead increase

Engineering Contradiction:

Improveuplink time alignment accuracyVSAvoidsignaling complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent combines multiple timing advance commands into a single unified command structure that can convey timing adjustments for multiple TRPs simultaneously. This merging approach maintains the precision needed for multi-TRP time alignment while reducing signaling overhead by eliminating the need for separate commands for each TRP.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The timing advance command is designed to serve multiple functions: it can indicate timing adjustments for a single TRP or multiple TRPs depending on the configuration. This multi-functionality allows the same signaling mechanism to adapt to different operational modes (single-TRP or multi-TRP) without requiring separate dedicated commands for each scenario.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If timing advance commands are frequently transmitted to maintain synchronization, then uplink time alignment is maintained, but signaling overhead and network load increase

Engineering Contradiction:

Improveuplink time alignment maintenanceVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent implements periodic timing advance command transmission where commands are sent at regular intervals rather than continuously. This periodic approach maintains synchronization reliability by ensuring timely updates while significantly reducing signaling overhead compared to continuous transmission, allowing the system to balance between alignment maintenance and resource consumption.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system dynamically adjusts the timing advance command transmission frequency based on channel conditions and synchronization requirements. When channel conditions are stable, transmission frequency is reduced to minimize overhead; when conditions deteriorate or alignment drift is detected, frequency increases to maintain reliability, creating an adaptive signaling strategy.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20230345540A1Enhanced Timing Advance Indication

Publication Date: 2023.10.26 PANPSY TECHNOLOGIES LLC

AI summary

A wireless device may transmit a random access preamble via a cell that is associated with a first TRP and a second TRP. The first TRP may be associated with a first TAG and the second TRP may be associated with a second TAG. The wireless device may receive a random access message. A first value of a first field of the random access message may indicate a first timing advance. A second value of a second field of the random access message may indicate that the first timing advance is applicable to the first TAG. The wireless device may transmit an uplink transmission to the first TRP based on the first timing advance.