Terminal Random Access Control for Cell Group Configuration Changes

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Solution Overview

Problem

There is no clear method for a terminal to determine how to initiate a random access procedure when changing candidate cell or cell group configurations in wireless communication systems.

Innovation Solution

A method for controlling random access is provided, where a terminal determines a change in candidate cell or cell group configuration and initiates random access in an activated target cell or cell group based on preconfigured conditions or network device instructions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the terminal changes the candidate cell or cell group configuration, then the terminal can adapt to different communication scenarios and improve communication performance, but there is no clear method to determine how to initiate random access procedure

Engineering Contradiction:

Improveterminal adaptability to different communication scenariosVSAvoidclarity of random access initiation method

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent applies parameter changes by modifying the random access initiation behavior based on the configuration change type. When the candidate cell configuration changes, the terminal determines whether to initiate random access based on specific parameters such as whether it is a handover scenario or a cell addition scenario, thereby resolving the ambiguity in random access initiation

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements dynamics by making the random access initiation process adaptive rather than static. The terminal dynamically determines whether to initiate random access based on the current configuration change context, allowing the system to flexibly respond to different communication scenarios while maintaining clear operational guidelines

Inventive Principle:

Principle #15Dynamics

2Reliability

If random access is initiated in every cell group configuration change, then connection reliability is improved, but communication resources are wasted

Engineering Contradiction:

Improveconnection reliabilityVSAvoidcommunication resource waste

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent applies partial action by initiating random access only in specific cases rather than in all configuration changes. The terminal selectively initiates random access based on whether the configuration change represents a handover scenario or a cell addition scenario, thereby maintaining connection reliability while avoiding unnecessary resource consumption

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The patent implements feedback by having the terminal evaluate the configuration change context before initiating random access. The terminal receives configuration change indications, determines the scenario type, and makes an informed decision about random access initiation, creating a feedback loop that prevents resource waste while ensuring connection reliability

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20260040363A1Random access control methods and apparatus

Publication Date: 2026.02.05 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A method for controlling random access includes: determining that a candidate cell or cell group configuration currently used by a terminal is changed; determining an activated target cell or cell group based on a changed candidate cell or cell group configuration; and initiating random access in a cell or cell group corresponding to the activated target cell or cell group.