Subscriber Identity Module Time Window Collision Avoidance

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Solution Overview

Problem

The increasing number of subscriber identity modules in mobile radio networks, particularly in M2M communication, leads to collisions due to cloned SIM cards with the same subscriber identifiers, causing authentication challenges and network congestion.

Innovation Solution

Implementing a communication profile that specifies unique time windows or periods for each subscriber identity module to establish communication connections, allowing for distinct logging times or subnetwork identifiers to avoid collisions and ensure unique identification.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If subscriber identity modules use identical subscriber identifiers for cloning purposes, then device compatibility and network access are improved, but collision probability and authentication reliability deteriorate

Engineering Contradiction:

Improvedevice compatibilityVSAvoidauthentication reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements periodic action by assigning different time windows for subscriber identity modules to establish communication connections with the mobile network. Each SIM is configured with specific time intervals during which it can register, ensuring that even cloned SIMs with identical identifiers do not collide during authentication processes. This temporal separation maintains both compatibility and reliability.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent applies preliminary action by pre-configuring unique time window parameters in the communication profile of each subscriber identity module before deployment. These time window settings are established in advance during SIM provisioning, enabling the system to prevent collisions proactively rather than reactively, thus maintaining authentication reliability while allowing cloning for compatibility.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If the number of subscriber identity modules in the network increases, then network coverage and service availability are improved, but collision probability and network congestion worsen

Engineering Contradiction:

Improveservice availabilityVSAvoidnetwork congestion

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent resolves this contradiction by implementing periodic time windows for SIM registration. Each subscriber identity module is assigned specific time intervals during which it can establish communication connections. This periodic structure allows numerous SIMs to coexist in the network without causing congestion, as they access the network in staggered time slots rather than simultaneously, thus maintaining high service availability while preventing network overload.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent applies dynamics by making the communication profile adaptable to different time conditions. The time window parameters can be dynamically adjusted based on network load, allowing the system to accommodate varying numbers of subscriber identity modules efficiently. This dynamic approach enables the network to scale service availability while actively managing congestion through flexible time-based access control.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If cloned subscriber identity modules are deployed, then user authorization coverage is improved, but network authentication reliability and collision resistance deteriorate

Engineering Contradiction:

Improveuser authorization coverageVSAvoidauthentication accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent resolves this contradiction by implementing periodic time windows for subscriber identity module registration. Each SIM, including cloned ones, is assigned specific time intervals during which it can establish communication connections with the mobile network. This temporal separation ensures that even though cloned SIMs share identical identifiers and expand authorization coverage, they do not collide during authentication processes, thereby maintaining authentication accuracy.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent applies preliminary action by pre-configuring unique time window parameters in the communication profile of each subscriber identity module before deployment. These time window settings are established in advance during SIM provisioning, enabling the system to prevent collisions proactively rather than reactively, thus maintaining authentication accuracy while allowing cloning for expanded user authorization coverage.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP3277004B1Subscriber identity module for access to mobile phone network

Publication Date: 2022.03.09 DEUTSCHE TELEKOM AG

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AI summary

The invention relates to a subscriber identity module (103a) for accessing a mobile network (120) and a method for operating such a subscriber identity module (103a). The subscriber identity module (103a) comprises a memory (105a) in which a communication profile is stored, wherein the communication profile indicates a communication time for establishing a communication connection to the mobile network (120). Furthermore, the subscriber identity module (103a) comprises a communication interface (107a) configured to establish the communication connection to the mobile network (120) at the communication time.