RTT Call Context Requests Before Answering Unwanted Calls

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Solution Overview

Problem

Unwanted phone calls often go unanswered, leading to missed important calls and the burden of sorting through numerous voicemails, wasting time and resources.

Innovation Solution

Requesting real-time text (RTT) call context from the caller before answering, using default bearers in cellular networks to facilitate informed decision-making.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the called party answers all incoming calls during a time period, then important calls are not missed, but time is wasted on unwanted calls

Engineering Contradiction:

Improveimportant call detectionVSAvoidtime spent on unwanted calls

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system performs preliminary action by requesting and receiving call context information from the caller before the called party answers the call. This allows the called party to make an informed decision about whether to answer, avoiding time waste on unwanted calls while ensuring important calls are answered.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback by providing call context information to the called party before call acceptance. This feedback loop enables the called party to make informed decisions about call answering, improving time efficiency while maintaining reliability in detecting important calls.

Inventive Principle:

Principle #23Feedback

2Ease of operation

If the called party diverts unanswered calls to voicemail, then unwanted calls are filtered, but voicemail storage is consumed and time is wasted parsing through messages

Engineering Contradiction:

Improvecall filteringVSAvoidtime spent parsing voicemails

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The system performs preliminary action by obtaining call context before the call is answered or diverted to voicemail. This allows the called party to identify unwanted calls in advance, reducing the need to parse through voicemail messages later and saving time while maintaining effective call filtering.

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If RTT request for call context is transmitted before call acceptance, then informed decision-making is enabled, but additional network signaling is required

Engineering Contradiction:

Improveinformed decision-makingVSAvoidnetwork signaling complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The system uses an intermediary approach by utilizing the existing default bearer and network infrastructure to transmit RTT requests and call context information. This leverages existing network components rather than introducing completely new signaling mechanisms, reducing the impact on system complexity while enabling informed decision-making.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250220100A1RTT call context request prior to answer

Publication Date: 2025.07.03 T MOBILE US INC

AI summary

Solutions are disclosed that request call context from the caller prior to answer by the called user equipment (UE). When the called UE receives an incoming call from a second (calling) UE, without accepting the incoming call, the called UE sends a real time text (RTT), to the calling UE, requesting context for the call. When the calling UE responds, the user of the called UE may make an informed decision of whether to accept the incoming call. In some examples, the RTT request for call context and the RTT response are carried over default bearers for the calling and called UEs, prior to call acceptance, at which point dedicated bearers are set up for both UEs.