Fire Panel Emergency Interface for TCP/IP Failure
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Solution Overview
Problem
Networked fire alarm systems face challenges in maintaining communication of alarm signals when a single switch/router or network processor fails, leading to potential loss of signal transmission and non-compliance with redundancy standards like EN54, which increases cost and complexity by requiring multiple redundant components.
Innovation Solution
A method and system that enable fire panels to transmit alarm signals via an emergency communication link separate from the primary TCP/IP link, using a panel processor, emergency interface, and dual transceivers to ensure continuous signaling even if the TCP/IP switch or network processor fails, employing a ring architecture with redundant connections and alternative communication protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple switches/routers and multiple network processors are used to avoid single point of failure, then system reliability is improved, but device complexity and cost increase
Solution Approach 1:
The system separates communication into two distinct segments: a primary TCP/IP network path and a secondary dedicated emergency communication path. This segmentation allows the emergency path to operate independently when the primary path fails, ensuring reliability without requiring multiple complex network processors or switches for the same function.
Solution Approach 2:
A dedicated emergency communication interface acts as an intermediary between the fire panel and adjacent panels, providing an alternative communication channel when the primary TCP/IP network fails. This intermediary path simplifies the overall system architecture compared to implementing full redundancy at the network processor level.
2Reliability
If TCP/IP switch or network processor fails, then communication reliability deteriorates, but adding redundant components increases cost
Solution Approach 1:
The emergency communication interface uses a simpler, more cost-effective communication mechanism compared to the primary TCP/IP network infrastructure. By accepting that this is a dedicated backup path rather than a full-featured network connection, the system achieves reliability without the high cost of complete component redundancy.
Solution Approach 2:
The emergency communication path is pre-configured and ready for immediate use before any failure occurs. The system establishes this backup communication channel in advance, so when the primary TCP/IP path fails, alarm signals can be transmitted immediately without requiring expensive redundant network processors or switches.
3Reliability
If redundant network topology is implemented, then compliance with EN54 standards is improved, but system complexity increases
Solution Approach 1:
The communication system is divided into two functional segments: the primary TCP/IP network for normal operation and the secondary emergency communication path for backup. This segmentation satisfies EN54 redundancy requirements by providing an alternative communication path without requiring complex redundant network processors or switches that would increase system complexity.
Solution Approach 2:
The emergency communication interface implements redundancy at the local fire panel level rather than requiring system-wide redundant infrastructure. Each panel has its own emergency communication capability, providing localized redundancy that meets EN54 standards without the complexity of system-wide redundant network processors and switches.
Data Source
AI summary
A system and method for providing emergency alarm communications in an fire panel network having a ring topology. The fire panels of the network each include an emergency interface between a panel processor and a panel transceiver. The emergency interface includes a communication link that is different from a normal TCP/IP communication link of the associated panel. The emergency interface comprises a separate communication path from the normal communication link. When normal TCP/IP communications are interrupted, the emergency interface is operable to transmit alarm signals to an adjacent panel in the network. The alarm signals may then be transmitted between subsequently connected panels and a workstation or central monitoring station via the normal TCP/IP mode. The workstation and/or central monitoring station can recognize the alarm signals as being generated by the originating panel. Other embodiments are disclosed and claimed.