MUSIM UE Connection Release and Paging Restriction

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Solution Overview

Problem

The increasing complexity of next-generation wireless communication systems, particularly in supporting devices with multiple universal subscriber identity modules (MUSIM), poses challenges in network architecture and resource management.

Innovation Solution

The proposed solution involves enhancing the service request procedure in 5G systems to accommodate MUSIM devices, including the use of specific information elements in the SERVICE REQUEST message to manage connection release, paging restriction, and paging reject operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the network supports MUSIM devices with multiple USIM cards, then device versatility and user convenience are improved, but network architecture complexity and resource management difficulty increase

Engineering Contradiction:

ImproveMUSIM device supportVSAvoidnetwork architecture complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the handling of multiple USIM connections by processing each USIM's service request independently through separate information elements in the NAS message. This allows the network to manage each SIM card's connection, paging, and resource allocation separately, reducing the complexity of managing multiple simultaneous connections.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements preliminary action by having the UE indicate its MUSIM capability and connection release preferences in advance through the SERVICE REQUEST message. The network can then pre-configure appropriate handling for multiple USIMs before conflicts arise, simplifying real-time resource management.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the network maintains continuous connections for all active UEs, then service reliability is improved, but network resource consumption and signaling overhead increase

Engineering Contradiction:

Improveservice reliabilityVSAvoidnetwork resource consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent applies dynamics by enabling flexible transition between connected and idle states for each USIM independently. The UE can dynamically request connection release for inactive USIMs while maintaining connections for active ones, allowing the network to adapt resource allocation in real-time based on actual service needs.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements discarding and recovering by allowing the network to release (discard) resources for USIMs that are not currently needing service, while maintaining the ability to quickly recover those resources when needed through paging or service requests. This reduces continuous resource consumption while ensuring service reliability when required.

Inventive Principle:

Principle #34Discarding and recovering

3Ease of operation

If the network sends paging messages to all UEs in idle mode, then service accessibility is improved, but signaling overhead and network traffic increase

Engineering Contradiction:

Improveservice accessibilityVSAvoidsignaling overhead

Core Design Contradiction:

Ease of operationVSQuantity of substance

Solution Approach 1:

The patent applies local quality by enabling the network to send paging messages selectively to specific UEs or specific USIMs based on service requirements, rather than broadcasting to all idle UEs. The paging message can be targeted to a particular UE identifier or USIM, reducing unnecessary signaling while maintaining service accessibility for relevant devices.

Inventive Principle:

Principle #3Local quality

4Adaptability or versatility

If the UE maintains multiple simultaneous connections for MUSIM operations, then device functionality is improved, but connection management complexity and processing overhead increase

Engineering Contradiction:

ImproveMUSIM functionalityVSAvoidconnection management complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments connection management by handling each USIM's connection state, service requests, and paging responses independently through separate information elements. This modular approach allows the UE to manage multiple connections through standardized, repeatable procedures for each USIM, reducing overall management complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies universality by using a single, standardized SERVICE REQUEST message format and information element structure that works for both single-USIM and multi-USIM devices. This universal interface simplifies the UE's connection management logic, as the same procedures handle all USIMs regardless of quantity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12273856B2Musim UE connection release, paging restriction and rejection

Publication Date: 2025.04.08 INTEL CORP

AI summary

An apparatus and system for a multiple universal subscriber identity module (MUSIM) user equipment (UE) are described. Due to activity on another USIM, the MUSIM UE transmits a service request message to release an N1 non-access stratum (NAS) signaling connection or reject a paging request received from the network, dependent on whether the MUSIM UE is in a 5th generation (5G) Mobility Management (5GMM)-CONNECTED mode or a 5GMM-IDLE mode. The service request message may contain a paging restriction that restrict paging to: all paging, all paging except for paging for voice service, all paging except for packet data unit (PDU) session(s), and all paging except for voice service and PDU session(s).