VoIP Call Transfer via Consultation Protocol

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Solution Overview

Problem

Existing VOIP networks face inefficiencies in seamlessly transferring telephone calls between devices of the same user without using an anchor server, which can disrupt call continuity and increase capital expenses.

Innovation Solution

The method employs a consultation call transfer protocol that establishes a connection between devices of the same user using a communication server, maintaining call continuity and eliminating the need for an anchor server, allowing seamless handoff of calls from one device to another without putting the call on hold.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an anchor server is used to transfer calls between devices of the same user, then call transfer capability is provided, but device complexity and capital expenses increase

Engineering Contradiction:

Improvecall transfer capabilityVSAvoidanchor server requirement

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent extracts the call transfer functionality from the dedicated anchor server and implements it directly in the VOIP client software on user devices. The client independently manages call transfer by establishing consultation calls and coordinating with the remote party, eliminating the need for the anchor server infrastructure.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The VOIP client on the user's device performs call transfer operations autonomously without requiring external anchor server assistance. The client initiates consultation calls, manages call state transitions, and coordinates the transfer process itself, making the system self-sufficient for call transfer operations.

Inventive Principle:

Principle #25Self-service

2Adaptability or versatility

If traditional call transfer methods are used, then call transfer is achieved, but call continuity is disrupted and the call must be put on hold

Engineering Contradiction:

Improvecall transfer functionalityVSAvoidcall continuity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system establishes a consultation call to the target device before terminating the original call. This preliminary action allows the target device to prepare and accept the call in advance, ensuring seamless transition without interrupting the ongoing call with the remote party.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent maintains continuous call connectivity throughout the transfer process. The original call to the remote party remains active while the consultation call is established with the target device, ensuring no interruption in the useful action of communication with the remote party.

Inventive Principle:

Principle #20Continuity of useful action

3Adaptability or versatility

If anchor servers are deployed in VOIP networks, then call transfer between devices is enabled, but capital expenses increase

Engineering Contradiction:

Improvecall transfer supportVSAvoidcapital expenses

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The patent removes the anchor server component from the VOIP network architecture and relocates the call transfer functionality to the end-user devices. This extraction eliminates the need for expensive dedicated server infrastructure while maintaining call transfer capability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The VOIP client software on user devices performs multiple functions including call establishment, call transfer, and consultation call management. This multi-functionality replaces the specialized anchor server, reducing infrastructure requirements and capital expenses.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS8264990B2Using consultation call to transfer call across endpoints

Publication Date: 2012.09.11 MICROSOFT TECHNOLOGY LICENSING LLC

AI summary

A method for transferring a telephone call from a client computer to a second electronic device includes establishing a connection for a telephone call between the client computer and a first electronic device, and sending a request to a server computer to transfer the telephone call from the client computer to the second electronic device, the client computer and the second electronic device having the same user, the request initiating a consultation call to the second electronic device. The method also includes receiving a response from the server computer that the second electronic device has accepted the telephone call, and replacing the client computer with the second electronic device as a party in the telephone call with the first electronic device, the continuity of the telephone call being maintained at the first electronic device during the time that the client computer is replaced with the second electronic device.