Emergency Communication Re-establishment via Mobile Trigger

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Solution Overview

Problem

Existing emergency communication systems face challenges in re-establishing connections after initial emergency communications are terminated, particularly in situations where network priority is low, leading to difficulties in obtaining updated information or re-establishing contact with the original caller, especially in emergency scenarios like carjackings or wildfires.

Innovation Solution

A method and system that utilize SMS, USSD, SIP, or IMS messages to instruct a mobile station to re-establish an emergency communication with an answering point, such as a PSAP or TPSC, without requiring user intervention, ensuring high priority handling and autonomous operation, even during ongoing emergency voice calls, to maintain continuous data transmission and location updates.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the PSAP calls the mobile terminal back via SIP after receiving a SIP emergency call, then the problem of recognition by the terminal as being an emergency call back is resolved by including a special indicator, but the call direction is PSAP to mobile which is treated by the network differently than an emergency call initiated by a mobile terminal

Engineering Contradiction:

Improveemergency communication re-establishmentVSAvoidcall direction handling

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

Instead of having the PSAP initiate the callback to the mobile terminal, the invention inverts the approach by having the PSAP send an instruction message to the mobile terminal, which then autonomously initiates the emergency call back to the PSAP. This ensures the call is treated with high priority by the network as it originates from the mobile terminal, resolving the issue of different network treatment for reverse-direction calls.

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If in-band signalling through the voice channel is used to transmit MSD from IVS to PSAP, then emergency communication can be established, but the deployment is expensive and requires modifying existing mobile and wire line networks

Engineering Contradiction:

Improveemergency communication establishmentVSAvoidnetwork deployment

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The invention uses existing multi-functional communication infrastructure (SMS, SIP, IMS messaging systems) that can handle both regular communications and emergency communication instructions. This eliminates the need for dedicated in-band modem infrastructure and network modifications, as the existing messaging channels can be leveraged to transmit instruction messages that trigger autonomous emergency call initiation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Loss of time

If an emergency communication is automatically established when airbag sensors are triggered, then rescue time is reduced, but the system cannot obtain updated information or re-establish contact after the original caller is incapacitated

Engineering Contradiction:

Improverescue response timeVSAvoidcontinuous information transmission

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The invention implements a feedback mechanism where the PSAP can send instruction messages to the mobile terminal even after the initial emergency call is terminated. Upon receiving such an instruction, the mobile terminal autonomously re-establishes the emergency communication, ensuring continuous information flow and enabling updated data transmission even if the original caller becomes incapacitated.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The mobile terminal is pre-configured with the capability to autonomously initiate emergency calls based on received instructions. This preliminary setup ensures that when the PSAP needs to re-establish contact, the terminal can immediately action the instruction without requiring user intervention, maintaining continuous communication reliability.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP2681963B1Methods, devices, system and computer program products for supporting the re-establishment of an emergency communication

Publication Date: 2015.02.25 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Figure 1~3
Figure 4~5b
Figure 6a~6c

AI summary

A network node (4), referred to as answering point (4), performs a method including a triggering procedure (s22) for triggering the transmission, towards a mobile station (2), of an instruction message (12a) including an instruction to start a new emergency communication towards the answering point (4). The triggering procedure (s22) includes sending (s226), towards the mobile station (2), a trigger message (12b). The mobile station (2) performs a method including a receiving procedure (s28) and a starting procedure (s30). The receiving procedure (s28) includes receiving the instruction message (12a) including the instruction to start a new emergency communication towards the answering point (4), and the starting procedure (s30) includes starting a new emergency communication towards the answering point (4). This enables to re-establish an emergency communication between the answering point (4) and the mobile station (2). The invention also relates to network nodes, mobile stations and computer programs.