IMS VoIP Call Management Via Dynamic Cloud Device Registration

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Solution Overview

Problem

Existing telecommunications systems require VoIP capable devices to be directly and permanently registered on and connected to the IMS system, limiting flexibility and functionality.

Innovation Solution

A communication system comprising an IMS system and a cloud-based customer management system registers devices with a customer, where incoming VoIP calls are managed by the cloud-based system, waking up only relevant devices for notifications and handling sessions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If VoIP capable devices are directly and permanently registered on the IMS system, then call establishment is reliable and straightforward, but device flexibility and energy efficiency deteriorate

Engineering Contradiction:

Improvecall establishment reliabilityVSAvoiddevice flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent introduces a cloud-based customer management system as an intermediary between the IMS system and VoIP devices. This mediator receives session requests from the IMS system, manages device registration dynamically, and forwards notifications to appropriate devices. The intermediary enables flexible device management while maintaining reliable call establishment by decoupling the permanent registration requirement from the actual call setup process.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If VoIP capable devices are directly registered on the IMS system, then call handling is simple, but system complexity and energy consumption increase

Engineering Contradiction:

Improvecall handling simplicityVSAvoidsystem complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent segments the call handling process into distinct functional components: the IMS system handles session initiation and routing, the cloud-based customer management system handles device registration and notification management, and individual devices handle call acceptance. This segmentation distributes complexity across multiple systems, making each component's function simpler while maintaining overall system capability.

Inventive Principle:

Principle #1Segmentation

3Speed

If devices are permanently connected to the IMS system, then call notifications are immediate, but energy efficiency and user mobility deteriorate

Engineering Contradiction:

Improvenotification speedVSAvoiddevice energy consumption

Core Design Contradiction:

SpeedVSUse of energy by moving object

Solution Approach 1:

Instead of requiring continuous connection, the system uses periodic polling or event-triggered notifications where devices check for incoming calls only when necessary. The cloud-based customer management system maintains a registry of devices and actively pushes notifications when calls arrive, allowing devices to enter low-power states between notifications while maintaining timely call delivery.

Inventive Principle:

Principle #19Periodic action

4Adaptability or versatility

If all devices associated with a customer are notified of incoming calls, then call accessibility is improved, but notification management complexity increases

Engineering Contradiction:

Improvecall accessibilityVSAvoidnotification management complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system implements feedback mechanisms where devices can indicate their availability status and call handling preferences to the cloud-based customer management system. The system uses this feedback information to intelligently route notifications to appropriate devices, avoiding unnecessary notifications to unavailable devices and reducing notification management complexity while maintaining broad call accessibility.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP4231617B1Method for managing and/or signaling at least one VOIP call and a communication system

Publication Date: 2025.10.22 DEUTSCHE TELEKOM AG

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AI summary

A method is provided using a communication system (100; 100') that comprises an IMS system (30) and a cloud-based customer management system (60, CMS) registered on the IMS system (30), the method comprising the steps of: a) Receiving, at the IMS system (30), an invite message, wherein the invite message includes an SDP offer and the address of a VoIP capable device (70); b) forwarding, by the IMS system (30), the invite message to the CMS system (60); c) Sending, by the CMS system (60), in response to the invite message a first notification message to the device (70), the first notification message including an information of an incoming VoIP call; d) Notifying, in response to the first notification message, the CMS system (60), that the device (70) is prepared to accept the incoming VoIP call; e) Forwarding, by the CMS system (60), the invite message to the device (70); f) Sending, by the device (70), a message including an SDP answer in response to the SDP offer to the CMS system (60); g) Forwarding the SDP answer, by the CMS system (60), to the IMS system (30).