Terminal Beam Timing Control for Inter-Cell Mobility

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Solution Overview

Problem

In future radio communication systems, the determination of cell application timing and beam application timing during inter-cell mobility remains unclear, leading to potential deterioration of communication quality.

Innovation Solution

A terminal equipped with a receiving section to receive specific information and a control section to determine cell and beam application timings based on this information, enabling appropriate timing determination.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If inter-cell mobility is implemented with separate candidate cell configuration, then mobility flexibility is improved, but timing determination clarity deteriorates

Engineering Contradiction:
Improvemobility flexibilityVSAvoidtiming determination clarity
Core Design Contradiction:
Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent introduces specific information (timing indication) as an intermediary element that mediates between the mobility management function and the terminal device. This timing indication explicitly carries timing determination information from the network side to the terminal, resolving the ambiguity in timing determination while preserving the flexibility of separate candidate cell configuration for inter-cell mobility

Inventive Principle:
Principle #24Intermediary (Mediator)

2Device complexity

If cell application timing is not appropriately determined, then system complexity is reduced, but communication quality deteriorates

Engineering Contradiction:
Improvesystem complexityVSAvoidcommunication quality
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The patent enables the terminal device to autonomously determine cell application timing and beam application timing based on the received specific information. This self-service mechanism allows the terminal to independently resolve timing determination without requiring complex network-side control or additional signaling, thereby maintaining low system complexity while ensuring reliable communication quality through accurate timing

Inventive Principle:
Principle #25Self-service

Data Source

PatentEP4712653A1Terminal, wireless communication method, and base station
Publication Date: 2026.03.18 NTT DOCOMO INC
  • EP4712653A1 patent drawingFigure 1A~1B
  • EP4712653A1 patent drawingFigure 2
  • EP4712653A1 patent drawingFigure 3

AI summary

A terminal according to one aspect of the present disclosure includes a receiving section that receives specific information indicating a timing, and a control section that determines, based on the specific information, at least one of a cell application timing and a beam application timing. According to one aspect of the present disclosure, it is possible to appropriately determine a cell application timing/beam application timing.