Session Continuity Server for Media Component Transfer

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Solution Overview

Problem

Existing technologies face challenges in efficiently transferring multimedia session components between different networks while maintaining communication session continuity, due to issues like network loading, costs, and support availability.

Innovation Solution

The solution involves identifying and transferring one or more media components from one access network to another, using a Session Transfer Identifier (STI) and Session Continuity Server to ensure seamless session transfer, with the ability to transfer specific media components like video or audio streams between different access networks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If session components are transferred between different networks, then network flexibility and cost optimization are improved, but session continuity and reliability deteriorate

Engineering Contradiction:

Improvenetwork flexibilityVSAvoidsession continuity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces a Session Continuity Server (SCS) as an intermediary entity that mediates session component transfers between different networks. The SCS maintains session state information and coordinates the transfer process, ensuring that session continuity is preserved even when components move between networks with different characteristics

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system performs preliminary actions by pre-establishing session context information and maintaining it in the Session Continuity Server before actual transfers occur. This allows the network to quickly restore session state without interruption during component transfers between different access networks

Inventive Principle:

Principle #10Preliminary action

2Productivity

If multiple media components are transferred simultaneously, then transfer efficiency is improved, but complexity of managing session state increases

Engineering Contradiction:

Improvetransfer efficiencyVSAvoidsession state management

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the session state management by separating the session context information from the actual media components. The Session Continuity Server stores session context while media components are transferred independently, allowing efficient parallel transfer without managing complex inter-dependent state transitions

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The Session Continuity Server acts as an intermediary that consolidates session state management, allowing multiple media components to be transferred simultaneously without increasing overall system complexity. The SCS handles state coordination centrally, simplifying the management of concurrent transfers

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP2324659B1Conveying session continuity information in a multi-component communication session

Publication Date: 2018.01.17 QUALCOMM INC

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AI summary

In a multimedia communication session with multiple media components, one or more media components can be transferred from one access network to another access network and yet maintain the continuity of the overall communication session. Each session is first identified and thereafter the media component intended to be transferred is also identified. The identities of the identified session and component are sent to one or more entities within the communication network for executing the media component transfer.