Supplementary Service Controller Interworking Circuit Packet Networks

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Solution Overview

Problem

In All-IP environments where both circuit and packet networks coexist, providing supplementary services for voice call services is challenging due to overlapping investments and increased time and cost, requiring effective management across both networks to ensure seamless service delivery.

Innovation Solution

A packet network system comprising a session controller and a supplementary service controller that interworks with a circuit network to provide and synchronize supplementary services, using a communication module and control module to check and offer available services to terminals, and sharing service profiles with the circuit network's Home Location Register to maintain consistent state information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If new infrastructures are constructed to provide supplementary services for packet based voice call service, then service capability is improved, but time and cost increase

Engineering Contradiction:

Improveservice capabilityVSAvoidconstruction time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent merges the supplementary service infrastructure between circuit network and packet network by establishing a service profile sharing mechanism. The HLR in circuit network and SSC in packet network share common supplementary service information, allowing both networks to utilize the same infrastructure resources without constructing separate systems, thereby reducing construction time and cost while maintaining service capability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The service profile stored in the HLR serves dual purposes: it provides supplementary service information for both circuit network and packet network. This universal data structure enables the same infrastructure to support multiple network types and service delivery methods, reducing the need for separate specialized infrastructures and thereby decreasing time and cost.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If new infrastructures are constructed to provide supplementary services for packet based voice call service, then service capability is improved, but cost increases

Engineering Contradiction:

Improveservice capabilityVSAvoidinfrastructure cost

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If supplementary services are controlled separately for circuit network and packet network, then network independence is maintained, but service consistency deteriorates

Engineering Contradiction:

Improvenetwork independenceVSAvoidservice consistency

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements a feedback mechanism where the SSC in packet network receives service profile information from the HLR in circuit network and maintains synchronized state information. When service status changes occur in one network, the other network is notified through feedback messages, ensuring consistent service delivery across both networks while maintaining their operational independence.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent establishes equipotentiality in service control by ensuring both circuit network and packet network have access to the same service profile information. The HLR and SSC share common supplementary service data, creating an equalized service control environment where both networks can provide consistent services without requiring separate control mechanisms.

Inventive Principle:

Principle #12Equipotentiality

4Reliability

If service profiles are shared between packet network and circuit network, then service consistency is improved, but system complexity increases

Engineering Contradiction:

Improveservice consistencyVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces the service profile as an intermediary data structure that mediates between the circuit network HLR and packet network SSC. This standardized intermediary format simplifies the sharing process by providing a common language and structure for service information exchange, reducing the complexity that would otherwise arise from direct integration of the two different network systems.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS9380435B2Communication system, packet network, supplementary service controller, and method for providing supplementary services

Publication Date: 2016.06.28 SK TELECOM CO LTD

AI summary

The disclosure relates to providing supplementary services by interworking a packet network and a circuit network and sharing resources used to provide supplementary services therebetween.