Paging Cause Signaling for Multi-SIM Conflict Resolution

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Solution Overview

Problem

Existing communication systems face inefficiencies in signaling consumption and conflict resolution when multiple SIM cards in a terminal receive paging messages, leading to unclear response determinations and increased network load.

Innovation Solution

A method where a network side device sends a paging cause to a terminal upon request, and provides rule information to resolve conflicts between SIM card operations, reducing unnecessary signaling and enabling informed response decisions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If the network side device always sends paging cause with every paging message, then the terminal can make informed response decisions, but the signaling consumption increases

Engineering Contradiction:

Improvepaging cause information availabilityVSAvoidsignaling consumption

Core Design Contradiction:

Loss of informationVSLoss of energy

Solution Approach 1:

The patent implements dynamic signaling where the network side device adaptively decides whether to send paging cause based on terminal capabilities and service types. The terminal dynamically requests paging cause when needed (e.g., for important services or when unable to determine response independently), and the network dynamically provides it only in those cases, optimizing the balance between information availability and signaling overhead.

Inventive Principle:

Principle #15Dynamics

2Reliability

If the terminal always responds to paging messages, then communication reliability is improved, but conflict between multiple SIM cards increases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidSIM card operation conflict

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements feedback mechanisms where the terminal evaluates the paging cause and its current communication state before deciding whether to respond. The terminal provides feedback to the network about its response decision, and the network can adjust future paging strategies based on this feedback, resolving conflicts between multiple SIM cards while maintaining reliable communication for important services.

Inventive Principle:

Principle #23Feedback

3Loss of energy

If the network side device sends paging cause only when requested, then signaling consumption is reduced, but the terminal may lack information for proper response determination

Engineering Contradiction:

Improvesignaling consumptionVSAvoidpaging cause information

Core Design Contradiction:

Loss of energyVSLoss of information

Solution Approach 1:

The patent implements preliminary action by having the terminal assess its own needs before requesting paging cause. The terminal determines in advance whether it can independently decide response based on its services and current state, and only requests paging cause when such preliminary assessment indicates the information is necessary. This prevents unnecessary signaling while ensuring information availability when needed.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12598581B2Method for sending paging cause and method for acquiring paging cause

Publication Date: 2026.04.07 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A method for sending a paging cause includes sending a paging message to a terminal; sending a paging cause of the paging message to the terminal according to receiving request information sent by the terminal. The request information requests the network side device to send the paging cause of the paging message to the terminal.