Telematics-Enhanced Emergency Call Routing via Packet-Switched Data
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Solution Overview
Problem
Current wireless communication systems face challenges in supporting telematics-enhanced emergency calls from mobile phones, particularly in distinguishing personal eCalls from other types of emergency calls and ensuring the transmission of telematics data, which can result in undesirable voice channel muting during location information transfer.
Innovation Solution
The system enables mobile phones to establish personal telematics-enhanced emergency calls by transmitting information that distinguishes them from other emergency calls, allowing the wireless network or PSAP to determine the capability for telematics data transmission, thereby routing calls appropriately and mitigating side effects such as voice channel muting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the wireless communications system requests and transmits location information during an emergency call using in-band signaling, then the PSAP receives necessary telematics data, but the voice channel is muted for several seconds causing communication disruption
Solution Approach 1:
The patent segments the emergency call handling into two distinct paths: voice communication through the circuit-switched network and data transmission through the packet-switched network. This allows location information to be transmitted without muting the voice channel, as the data path and voice path are separated. The UE can send location data via packet-switched uplink while maintaining continuous voice communication through the circuit-switched connection.
Solution Approach 2:
The patent introduces a packet-switched network as an intermediary for data transmission, mediating between the UE and PSAP for location information exchange. This intermediary path allows telematics data to be transmitted without interfering with the primary voice communication channel, effectively resolving the conflict between data transmission and voice continuity.
2Loss of information
If the system uses eCall in-band signaling protocol for personal emergency calls, then location data can be transferred, but the voice channel muting side effect occurs which is undesirable when the mobile phone cannot provide requested information
Solution Approach 1:
The patent implements dynamic capability detection and adaptive routing. The system dynamically determines whether the UE supports telematics data transmission by checking for specific capabilities (e.g., ECGOS capability). Based on this dynamic assessment, the system adaptively selects the appropriate communication path: packet-switched for capable devices, circuit-switched for incapable devices. This dynamic approach ensures voice communication continuity while still enabling location transfer when possible.
Solution Approach 2:
The patent changes the transmission parameter (network path) based on device capability. For UEs that support telematics data, the system uses packet-switched uplink with specific parameters (e.g., indicator in uplink message). For UEs that don't support it, the system reverts to traditional circuit-switched voice-only mode. This parameter change based on capability detection resolves the contradiction by matching the transmission method to the device's actual abilities.
3Loss of information
If the mobile phone transmits telematics data during an emergency call, then the PSAP receives additional location information, but the transmission may cause voice channel muting which reduces ease of operation
Solution Approach 1:
The patent performs preliminary capability detection and path selection before the emergency call is fully established. The system determines in advance whether the UE supports telematics data transmission and pre-configures the appropriate communication path. This preliminary action prevents voice channel muting during the call, as the correct path is already established, thereby maintaining ease of operation while enabling telematics data transmission when supported.
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AI summary
Methods, systems, apparatuses, and computer-readable mediums are described for techniques for supporting telematics-enhanced emergency calls from mobile phones. In some aspects, a method for wireless communication may include establishing, by a user equipment (UE), a personal telematics-enhanced emergency call to a public safety answering point (PSAP), wherein the UE is capable of transmitting telematics data. The method may also include transmitting information that distinguishes the personal telematics-enhanced emergency call from other types of emergency calls.