Softphone Packet Header Analysis for TTY Window Activation

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Solution Overview

Problem

Existing communication solutions fail to automatically activate text windows for TTY users in softphone applications, especially in direct-dial calls and multi-mode unified communication environments, leading to inefficient resource utilization and potential missed communications.

Innovation Solution

Implementing a packet analyzer in communication devices to automatically open the TTY/text window based on packet headers indicating TTY information, using standards like RFC-2833, and extending this approach to trigger other application windows for different media types, such as video, by analyzing packet headers without deep-packet inspection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the text chat window is always presented in softphone applications, then TTY users can communicate effectively, but the GUI becomes unnecessarily cluttered and hardware resources are wasted

Engineering Contradiction:

ImproveTTY communication reliabilityVSAvoidGUI clutter

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system performs preliminary analysis of packet headers to identify TTY communication needs before the text chat window is actually needed. The packet analyzer detects TTY-specific packet formats (such as RFC-2833) in advance and triggers the window activation proactively, so the window is ready when needed but not displayed unnecessarily during regular voice calls

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The softphone application automatically detects TTY communication requirements through packet header analysis and self-activates the text chat window without user intervention. The system monitors incoming packets, identifies TTY protocols, and autonomously manages the window state, eliminating the need for manual user actions while ensuring reliable TTY communication

Inventive Principle:

Principle #25Self-service

2Ease of operation

If all communication hardware and network bandwidth are assigned at the onset of a communication session, then all media types are available immediately, but hardware resources and network bandwidth are unnecessarily consumed

Engineering Contradiction:

ImproveMedia availabilityVSAvoidHardware resource consumption

Core Design Contradiction:

Ease of operationVSLoss of energy

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The softphone application dynamically adjusts its resource allocation and window display state based on real-time analysis of incoming packet headers. Rather than statically allocating resources for all media types at session start, the system continuously monitors packet formats and adapts its behavior - activating text windows only when TTY packets are detected and deactivating them when voice packets resume, thereby optimizing both responsiveness and resource efficiency

Inventive Principle:

Principle #15Dynamics

3Loss of energy

If users manually activate application windows, then resource utilization is optimized, but TTY users may not be identified timely and communications are missed

Engineering Contradiction:

ImproveResource utilization efficiencyVSAvoidTTY window activation delay

Core Design Contradiction:

Loss of energyVSLoss of time

Solution Approach 1:

The system implements a feedback mechanism where the packet analyzer continuously monitors incoming communication packets and provides real-time information about the communication medium being used. When TTY-specific packet formats are detected, this feedback automatically triggers the text chat window activation. This closed-loop system ensures timely response to TTY communication needs without requiring manual user intervention

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

Inventive Principle:

Principle #25Self-service

4Measurement precision

If packet deep-inspection is performed to identify communication medium, then accurate detection is achieved, but processing time and computational resources increase

Engineering Contradiction:

ImproveCommunication medium detection accuracyVSAvoidPacket processing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system extracts only the essential identifying information from packet headers - specifically the protocol type indicators that distinguish TTY packets (such as RFC-2833) from voice packets. Rather than performing deep inspection of entire packet contents, the packet analyzer focuses exclusively on the header portion containing medium identification data, achieving accurate detection with minimal processing overhead

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP2323336B1Packet headers as a trigger for automatic activation of special-purpose softphone applications

Publication Date: 2018.04.25 AVAYA INC

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AI summary

Methods, devices, and systems for automatically controlling the activation and/or deactivation of communication applications are provided. More specifically, methods, devices, and systems are provided such that the inspection of communication packet headers can be leveraged as a trigger for automatically activating and/or deactivating communication applications and the population of a corresponding user-interface to the application.