MUSIM Terminal Power Allocation Under Inter-SIM Interference

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Solution Overview

Problem

Interference between simultaneous SIM (Single IMSI Multi-SIM) communications is a challenge in 5G NR systems, particularly in determining maximum output power requirements.

Innovation Solution

Implementing capacity limitations and interference management techniques to optimize power usage in multi-SIM devices, ensuring reduced interference and efficient power allocation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If maximum output power requirements are applied to determine transmit power in MUSIM terminals, then power allocation is optimized, but interference between SIM communications increases

Engineering Contradiction:

Improvepower allocation efficiencyVSAvoidinterference between SIM communications

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The patent segments the power allocation process by determining maximum output power requirements separately for each SIM card based on its specific operating conditions. This allows independent optimization of power for each SIM while considering the overall interference environment, resolving the contradiction between power efficiency and interference reduction.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements feedback mechanisms where the terminal monitors interference levels between SIM communications and adjusts power allocation accordingly. The network receives information about maximum output power requirements and provides feedback to optimize transmit power, creating a closed-loop system that balances power efficiency with interference management.

Inventive Principle:

Principle #23Feedback

2Object-affected harmful factors

If capacity limitation is performed considering interference, then interference management is improved, but communication capacity is reduced

Engineering Contradiction:

Improveinterference managementVSAvoidcommunication capacity

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The patent applies dynamic capacity limitation where the terminal determines maximum output power requirements based on real-time interference conditions and operational parameters. Rather than static limitations, the system dynamically adjusts power constraints to maintain communication capacity while managing interference, allowing capacity to fluctuate according to actual network conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes key parameters such as maximum output power requirements, transmit power levels, and capacity limitations based on interference measurements and operational context. By adjusting these parameters dynamically, the system achieves effective interference management without permanently reducing communication capacity, resolving the contradiction between interference control and productivity.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP4664952A1Communication method of musim terminal

Publication Date: 2025.12.17 LG ELECTRONICS INC

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AI summary

One disclosure of the present disclosure provides a method by which UE performs communication. The method comprises the steps of: establishing a Radio Resource Control (RRC) connection with a first base station; wherein the UE is configured with Multi-Universal Subscriber Identity Module (MUSIM), transmitting, a second base station, information on restricted capability of the UE, wherein the restricted capability of the UE is based on interference by communication with the first base station and communication with the second base station.