Gateway Device RTCP Interruption Detection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

RTCP interruption monitoring can mistakenly detect media interruptions during changes in RTCP sending conditions, leading to unnecessary call disconnections even when there are no U-plane or terminal malfunctions.

Innovation Solution

A gateway device is implemented with detection and generation means to monitor media transfer packets and control packets, generating RTCP packets or call control signals when RTCP packets are stopped, ensuring continued media transfer and preventing false interruption detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If RTCP interruption monitoring is performed to detect media transfer interruptions, then media transfer reliability is improved, but false detection of interruptions occurs when RTCP sending conditions change, leading to unnecessary call disconnections

Engineering Contradiction:

Improvemedia transfer reliabilityVSAvoidinterruption detection accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The gateway device acts as an intermediary between the RTCP monitoring system and the media transfer packets. It receives RTCP packets, monitors for interruptions, and when an interruption is detected, generates a supplementary RTCP packet to confirm whether the interruption is real or due to changed sending conditions. This intermediary function resolves the contradiction by adding a verification step that improves measurement precision while maintaining reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system implements a feedback mechanism where the gateway device monitors RTCP packet reception status and sends supplementary RTCP packets in response to detected interruptions. The reception side's response to these supplementary packets provides feedback that helps distinguish between actual media transfer interruptions and changes in RTCP sending conditions, thereby improving interruption detection accuracy without compromising reliability.

Inventive Principle:

Principle #23Feedback

2Reliability

If RTCP packets are monitored continuously to ensure communication quality, then communication quality assurance is improved, but communication continuity may be interrupted due to false interruption detection

Engineering Contradiction:

Improvecommunication quality assuranceVSAvoidcommunication continuity

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The gateway device prepares supplementary RTCP packets in advance when interruptions are detected, before making final determination about actual media transfer failures. This cushioning approach prevents premature call disconnections by having verification mechanisms ready, thus maintaining communication continuity while still ensuring quality assurance through proper verification of actual interruptions.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS11431762B2Gateway device and monitoring method

Publication Date: 2022.08.30 NIPPON TELEGRAPH & TELEPHONE CORP

AI summary

Unexpected call disconnection during normal time is prevented. When a gateway device 1 installed on a POI border receives RTP packets even though reception of RTCP packets is stopped, the gateway device 1 generates RTCP packets and sends out the RTCP packets to the gateway device 1's own network side or the gateway device 1 generates a call control signal showing that media transfer is continued and sends out the call control signal to the gateway device 1's own network side. Thereby, even in the case of performing interruption monitoring of RTCP packets within the gateway device 1's own network, it is possible to prevent unexpected call disconnection during normal time accompanying change in RTCP packet sending-out conditions.