IP Router Converting Location Data for Legacy PSAPs
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Solution Overview
Problem
During the transition of emergency communication systems from circuit-switched networks to IP-enabled networks, location information may not be properly passed to legacy PSAPs when emergency calls are routed from mobile devices, as these systems are not always compatible with the new infrastructure.
Innovation Solution
An IP router receives a base station identifier for an emergency communication session, selects a PSAP, determines its type and network type, transfers a location request, receives location information, and converts it into PSAP signaling compatible with the selected PSAP, ensuring accurate routing of location data regardless of PSAP type or network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the emergency communication system transitions to an IP-enabled network, then enhanced services such as text messaging, images, video and data become available, but location information may not be properly passed to legacy PSAPs
Solution Approach 1:
The patent introduces an IP router as an intermediary device between the IP-enabled emergency communication system and legacy PSAPs. This router receives location information from the IP network, converts it into appropriate signaling formats, and forwards it to the destination PSAP. The intermediary resolves the incompatibility between modern IP-based location delivery and legacy circuit-switched PSAP requirements, ensuring location information is preserved during the network transition.
Solution Approach 2:
The IP router dynamically changes the format and parameters of location information based on the destination PSAP type. For IP-enabled PSAPs, location data is transmitted in native IP formats, while for legacy PSAPs, the router converts location information into circuit-switched signaling formats. This parameter adaptation allows the same location information to be properly delivered to both modern and legacy systems without loss.
2Reliability
If emergency calls from mobile devices are routed through the ESInet to legacy PSAPs, then compatibility with existing infrastructure is maintained, but location information cannot be passed in the call
Solution Approach 1:
The IP router serves as a specialized intermediary that bridges the ESInet and legacy PSAP infrastructure. It intercepts emergency calls routed through the IP network, extracts location information, converts it to appropriate formats, and injects it into the circuit-switched signaling path to the legacy PSAP. This ensures location information is preserved even when calls must route through legacy infrastructure.
3Adaptability or versatility
If the system uses different signaling formats for different PSAP types, then compatibility across network types is achieved, but device complexity increases
Solution Approach 1:
The IP router is designed as a universal device that handles multiple PSAP types and network configurations through a single platform. It implements a unified architecture that can adapt to different destination types (IP PSAP, legacy PSAP, different circuit-switched formats) without requiring separate specialized equipment for each case. This multi-functionality reduces overall system complexity compared to having dedicated conversion devices for each PSAP type.
Data Source
AI summary
An Internet Protocol (IP) router provides location information for an emergency communication session. The IP router receives a base station identifier associated with a request for the emergency communication session. The IP router selects a Public Safety Answering Point (PSAP) based on the base station identifier. The IP router determines a PSAP type and a network type for the selected PSAP. The IP router transfers a location request for delivery to a location control system and receives location information transferred from the location control system. The IP router converts the location information into PSAP signaling used by the selected PSAP based on the PSAP and network type. The IP router transfers the converted location information for delivery to the selected PSAP.