Paging Timing Reference for Low-Latency Uplink Synchronization

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Solution Overview

Problem

Existing wireless communication networks face challenges in simplifying signaling and reducing latency associated with paging operations, particularly in achieving accurate downlink and uplink synchronization for user equipment in connected and non-connected states.

Innovation Solution

A one-way measurement strategy is employed using a timing reference to estimate propagation delay, allowing user equipment to receive downlink messages and transmit uplink signals based on the difference between reception and transmission times, thereby improving synchronization accuracy and reducing latency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If round-trip measurement strategy is used to obtain timing advance, then uplink synchronization can be achieved, but signaling complexity and latency increase

Engineering Contradiction:

Improveuplink synchronization accuracyVSAvoidsignaling complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the timing advance information from the downlink message itself, allowing the UE to directly obtain propagation delay without requiring a separate round-trip measurement exchange. This eliminates the need for additional uplink transmission and timing adjustment signaling, reducing signaling complexity while maintaining synchronization accuracy.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The base station pre-calculates and includes the timing advance value in the downlink message before the UE needs to transmit uplink signals. This preliminary provision of timing information eliminates the need for post-message timing adjustment procedures, reducing both signaling overhead and latency.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If round-trip measurement strategy is used to obtain timing advance, then uplink synchronization can be achieved, but transmission latency increases

Engineering Contradiction:

Improveuplink synchronization accuracyVSAvoidtransmission latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The timing advance information is calculated and included in the downlink message in advance, before the UE needs to transmit uplink signals. This eliminates the need for additional round-trip measurement exchanges after the downlink message is received, significantly reducing transmission latency while maintaining synchronization accuracy.

Inventive Principle:

Principle #10Preliminary action

3Measurement precision

If timing reference information is provided in downlink message, then propagation delay estimation accuracy improves, but message complexity increases

Engineering Contradiction:

Improvepropagation delay estimation accuracyVSAvoidmessage complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The timing reference information is extracted and embedded within the existing downlink message structure rather than requiring a separate dedicated message. This integration approach provides accurate propagation delay estimation while minimizing the increase in message complexity by utilizing already-transmitted signaling resources.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20260040306A1System and scheme on paging operation with timing reference

Publication Date: 2026.02.05 HUAWEI TECH CO LTD

AI summary

An example method includes receiving, at a reception time, a downlink message, and transmitting a uplink signal with an uplink signal timing. The uplink signal timing is based on a difference between the reception time and a transmission time determined for the downlink message.