Group-Based Timing Advance Adjustment for High-Speed Train Wireless Networks

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Solution Overview

Problem

In high-speed train scenarios, wireless communication networks face significant overhead due to frequent timing advance (TA) adjustments and other configuration updates needed for multiple user equipment (UEs), which can be inefficient and resource-intensive when sent individually.

Innovation Solution

A method and apparatus for dynamically grouping UEs on a train, allowing a base station to send common configuration updates, such as timing advance adjustments, beam configurations, and uplink power control settings, reducing signaling overhead by broadcasting a single command to all UEs in the group.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If individual timing advance adjustments are sent to each UE, then each UE receives accurate configuration updates, but signaling overhead increases significantly

Engineering Contradiction:

Improveconfiguration update accuracyVSAvoidsignaling overhead

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent merges multiple individual timing advance adjustment messages into a single group common signaling message that can be received by multiple UEs simultaneously. This combining approach maintains the accuracy of configuration updates while significantly reducing the quantity of signaling overhead by transmitting one unified message instead of multiple separate messages to each UE individually

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If frequent timing advance adjustments are sent to maintain synchronization, then uplink synchronization is improved, but network resource consumption increases

Engineering Contradiction:

Improveuplink synchronizationVSAvoidnetwork resource consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent combines multiple timing advance adjustment operations into a single group common signaling transmission that maintains uplink synchronization for multiple UEs. This approach ensures reliable synchronization is maintained across the group while reducing network resource consumption by eliminating the need to send separate frequent update messages to each individual UE

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If individual configuration updates are transmitted to each UE, then each UE receives tailored settings, but transmission time increases

Engineering Contradiction:

Improveconfiguration customizationVSAvoidtransmission time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent merges configuration update transmissions into a single group common signaling message that can be applied by multiple UEs simultaneously. This approach reduces transmission time significantly compared to sending individualized updates to each UE separately, while still maintaining adaptability through group-based configuration parameters that can be tailored to the specific group's needs

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS11917606B2Group-based timing advance (TA) adjustment

Publication Date: 2024.02.27 QUALCOMM INC

AI summary

A method of wireless communication by a user equipment (UE) includes receiving an indication that the UE has been added to a group. The method also includes receiving group common signaling informing the UE of a configuration change. A method of wireless communication by a base station includes defining a group of user equipments (UEs). The method also includes notifying each UE of the group of inclusion into the group of UEs. The method still further includes transmitting, to the group of UEs, group common signaling including a configuration change for the group of UEs.