Multi-USIM Paging Coordination for Seamless Concurrent Registration

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Solution Overview

Problem

The seamless provision of communication services is hindered when multiple USIMs are configured in a UE due to overlapping paging occasions, differing RRC states, and simultaneous data transmissions/receptions, leading to service interruptions and limitations.

Innovation Solution

A method and device for a UE with multiple USIMs that involves determining the release of networks in a connected state, transmitting assistance information to a base station or core network control plane entity, and monitoring paging messages based on this information, while a base station receives and controls paging messages accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple USIMs are configured in a single UE, then the UE can simultaneously transmit/receive data according to various communication environments and UE characteristics, but the UE's paging occasions may overlap and data transmissions/receptions may overlap causing service interruptions

Engineering Contradiction:

Improvemulti-USIM capabilityVSAvoidservice continuity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements dynamic state management for multiple USIMs, where the UE can switch between connected and idle states for different USIMs based on current communication needs. The network can dynamically control the state of each USIM to prevent paging occasion overlaps and ensure reliable service delivery.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent segments the network connection management by introducing separate state configurations for each USIM. The UE can independently manage the RRC connected or idle state for each USIM, allowing selective activation and preventing resource conflicts between multiple USIMs.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If multiple USIMs are configured in a single UE, then the UE can use dedicated networks operated by different operators, but the UE's state may be set differently to each USIM requiring specific procedures to handle operations

Engineering Contradiction:

Improvemulti-network supportVSAvoidstate management complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements a universal state management mechanism that handles multiple USIMs through a common framework. The network can uniformly apply state transition procedures and control mechanisms across all USIMs, simplifying the management complexity while maintaining support for multiple networks and operators.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If the UE maintains concurrent registration to multiple networks, then the UE can access different services, but data transmissions may overlap causing service interruptions

Engineering Contradiction:

Improveservice availabilityVSAvoiddata transmission reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary anti-action by having the network proactively control the RRC state of USIMs before data transmissions occur. The network can pre-establish state configurations that prevent overlapping transmissions, ensuring reliable data delivery while maintaining service availability across multiple networks.

Inventive Principle:

Principle #9Preliminary anti-action

Data Source

PatentUS12634679B2Method for performing communication using multiple USIMs and device therefor

Publication Date: 2026.05.19 KT CORP

AI summary

Provided are a method and a device for performing communication by a UE with multiple USIMs that are in operation at the same time. The method may include determining, in a state of concurrent registration to one or more networks associated with multiple USIMs, release of one or more networks in a connected state, transmitting assistance information for instructing release to a base station or a core network control plane entity, and monitoring a paging message based on the assistance information.