communication systems

Abstract

To provide a communication system capable of reliably transmitting event information.SOLUTION: A communication system 100 comprises a disaster prevention receiver 101, and a first fire alarm server 1 and a second fire alarm server 2 which are capable of communicating with the disaster prevention receiver 101. The disaster prevention receiver 101 transmits common event information to the first fire information server 1 and the second fire information server 2. The first fire alarm server 1 and the second fire alarm server 2 can communicate with an external server 102. One system of the first fire alarm server 1 and the second fire alarm server 2 operates as a main system, and the other system of the first fire alarm server 1 and the second fire alarm server 2 operates as a sub system. The main system transmits at least the event information to the external server 102.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to communication systems. [Background technology]

[0002] BACKGROUND ART Disaster prevention receivers that perform disaster prevention processing when a fire occurs have been known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2015-005312 Summary of the Invention [Problem to be solved by the invention]

[0004] Meanwhile, a technology has been proposed that utilizes event information (e.g., information indicating the occurrence of a fire) from a fire alarm system such as a disaster prevention receiver. In this technology, the fire alarm system receives the event information from the fire alarm system and transmits the received event information to an external system.

[0005] However, for example, if a malfunction occurs in the fire alarm system, it may be impossible to transmit the event information to an external system, making it difficult to use the event information appropriately.

[0006] The present invention has been made in view of the above problems, and has an object to provide a communication system that can reliably transmit event information. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems and achieve the object, a communication system according to claim 1 is a communication system including a fire alarm system, and a first fire alarm system and a second fire alarm system that are capable of communicating with the fire alarm system, wherein the fire alarm system transmits common event information to the first fire alarm system and the second fire alarm system, the first fire alarm system and the second fire alarm system are capable of communicating with an external system, one of the first fire alarm system or the second fire alarm system operates as a main system based on the event information from the fire alarm system, and the other of the first fire alarm system or the second fire alarm system operates as a sub-system based on the event information from the fire alarm system, and the main system transmits at least the event information to the external system. The one system operating as the main system transmits an alive / dead signal to the other system operating as the sub-system, and the other system operating as the sub-system determines whether the main system is malfunctioning based on the alive / dead signal, and if it determines that the main system is malfunctioning, transmits the event information received since the last time the alive / dead signal was received normally to the external system. [Effects of the Invention]

[0011] According to the communication system described in claim 1, by providing a first fire alarm system and a second fire alarm system, for example, the fire alarm system can be made redundant, thereby making it possible to reliably transmit event information. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a block diagram showing a communication system according to an embodiment of the present invention; [Figure 2] FIG. 10 is a diagram for explaining the operation. [Figure 3] FIG. 10 is a diagram for explaining the operation. [Figure 4] 10 is a flowchart of a secondary system side operation monitoring process. [Figure 5] FIG. 10 is a diagram for explaining the operation. [Figure 6] 10 is a flowchart of a transmission monitoring process on the secondary system side. [Figure 7] FIG. 10 is a diagram for explaining the operation. [Figure 8]FIG. 10 is a diagram for explaining the operation. DETAILED DESCRIPTION OF THE INVENTION

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A communication system according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiment.

[0017] [Basic Concept of the Embodiment] First, the basic concept of this embodiment will be described. This embodiment generally relates to a communication system.

[0018] The "communication system" is a system for communicating event information, and includes, for example, a fire alarm system, a first fire alarm system, and a second fire alarm system.

[0019] "Event information" is a concept that includes, for example, information indicating events that occur in the target area to which the fire alarm system is applied (e.g., fires, etc.) and events that occur on the fire alarm system itself (e.g., failures, etc.). These events may also be interpreted as "events."

[0020] A "target area" is an area to which fire alarm equipment is applied and which is the target of disaster prevention measures, and is a concept that includes, for example, any area within a building (e.g., a room, hallway, stairwell, etc.) or any area outside a building (e.g., a parking lot, etc.).

[0021] "Fire alarm equipment" refers to equipment for alerting to fires, and is a concept that includes, for example, disaster prevention receivers that perform various fire-related processes based on the results of fire detection by sensors, or display devices that display information about the target area.

[0022] The first fire alarm system and the second fire alarm system are systems that receive common event information transmitted from the fire alarm equipment and perform various processes, and are configured to be able to execute similar processes with each other, making them redundant. Furthermore, the first fire alarm system and the second fire alarm system are configured so that one system operates as the main system and the other operates as the sub-system, and can be switched between operating as either system at an appropriate timing.

[0023] In the following embodiment, a case will be described in which the fire alarm system is a disaster prevention receiver.

[0024] [Specific details of the embodiment] Next, specific details of the embodiment will be described.

[0025] (composition) First, the configuration of a communication system according to this embodiment will be described below. Fig. 1 is a block diagram showing the communication system according to this embodiment.

[0026] The communication system 100 in FIG. 1 includes, for example, a disaster prevention receiver 101, a first fire alarm server 1, a second fire alarm server 2, and an external server 102.

[0027] Each of the first fire alarm server 1, the second fire alarm server 2, and the external server 102 may be configured as a cloud computer realized by connecting a plurality of computers so that they can communicate with each other.

[0028] (Configuration - Disaster prevention receiver) The disaster prevention receiver 101 is a fire alarm system, and is, for example, a device that transmits common event information to the first fire alarm server 1 and the second fire alarm server 2. The disaster prevention receiver 101 is, for example, a device that performs various processes related to disaster prevention based on various signals received from a sensor side (not shown). The disaster prevention receiver 101 includes, for example, a communication unit, a recording unit, and a control unit (not shown). Note that a known configuration can be applied to the specific configuration of this disaster prevention receiver 101, so detailed description will be omitted.

[0029] (Configuration: First fire alarm server) The first fire alarm server 1 is the first fire alarm system, and specifically, is capable of communicating with other devices (disaster prevention receiver 101, second fire alarm server 2, and external server 102), and is equipped with, for example, a communication unit 11, a recording unit 12, and a control unit 13.

[0030] (Configuration - 1st fire alarm server - Communications section) The communication unit 11 is a communication means for communicating with other devices or systems, and can be configured using, for example, a known communication circuit or the like.

[0031] (Configuration - 1st fire alarm server - Recording section) The recording unit 12 is a recording means for recording programs and various data necessary for the operation of the first fire alarm server 1, and is configured, for example, using a hard disk or various memories as an external recording device (the same applies to the recording units of other devices).

[0032] Event history information is stored in the recording unit 12. The "event history information" is information indicating the history of event information received from the disaster prevention receiver 101.

[0033] (Configuration - 1st fire alarm server - control unit) The control unit 13 is a control means for controlling the first fire alarm server 1, and is specifically a computer including a CPU, various programs interpreted and executed on the CPU (including basic control programs such as an OS and application programs that are launched on the OS and realize specific functions), and an internal memory such as RAM for storing programs and various data (the same applies to control units of other devices). In particular, the program according to the embodiment is installed on the first fire alarm server 1 via an arbitrary recording medium or a network, thereby substantially configuring each unit of the control unit 13 (the same applies to control units of other devices). The processing performed by the control unit 13 will be described later.

[0034] (Configuration - Second fire alarm server) The second fire alarm server 2 is a second fire alarm system, and specifically, is capable of communicating with other devices (the disaster prevention receiver 101, the first fire alarm server 1, and the external server 102), and includes, for example, a communication unit 21, a recording unit 22, and a control unit 23. The communication unit 21, the recording unit 22, and the control unit 23 are the same as the components of the first fire alarm server 1 with the same names.

[0035] The first fire alarm server 1 and the second fire alarm server 2 are configured to be able to execute similar processes and are a redundant system. One of the first fire alarm server 1 and the second fire alarm server 2 operates as a main system, and the other operates as a sub-system, with switching occurring at appropriate times.

[0036] (Configuration - External Server) The external server 102 is an external system, and is, for example, a device that receives event information transmitted from the disaster prevention receiver 101 via the first fire alarm server 1 or the second fire alarm server, and provides various services based on the received event information. The external server 102 includes, for example, a communication unit, a recording unit, and a control unit, all of which are not shown.

[0037] The various services mentioned here are a concept that includes any service, such as a service that provides users with information corresponding to event information, or a service that stores that information.

[0038] (operation) Next, the operation of the main system and the operation of the sub-system will be explained with reference to Figures 2 and 3.

[0039] First, when an event occurs, the disaster prevention receiver 101 transmits the same disaster prevention side event signal to the first fire alarm server 1 and the second fire alarm server 2. The "disaster prevention side event signal" is a signal that includes event information indicating the event that has occurred and identification information for uniquely identifying the event information.

[0040] For example, if a fire breaks out in room 303 of a building and a detector in room 303 detects the fire, the disaster prevention receiver 101 transmits a disaster prevention event signal to the first fire alarm server 1 and the second fire alarm server 2, the disaster prevention event signal including the event information "Fire breaks out in room 303" and "ID001", which is identification information that uniquely identifies the event information.

[0041] (Operation - When the first fire alarm server operates as the main system) As shown in Fig. 2, when the first fire alarm server 1 operates as the main system, the first fire alarm server 1 operating as the main system receives a disaster prevention side event signal, acquires the event information and identification information contained in the received disaster prevention side event signal, associates the acquired event information and identification information with time information indicating the current time, and stores and accumulates the information as event history information in the recording unit 12 of Fig. 1. Next, the first fire alarm server 1 operating as the main system generates an alarm side event signal including the event information and identification information contained in the received disaster prevention side event signal, and transmits it to the external server 102.

[0042] On the other hand, as shown in Figure 2, the second fire alarm server 2 operating as a sub-system receives the disaster prevention side event signal, acquires the event information and identification information contained in the received disaster prevention side event signal, correlates the acquired event information and identification information with time information indicating the current time, and stores and accumulates it as event history information in the recording unit 22 of Figure 1.

[0043] 2, the event information from the disaster prevention receiver 101 is transmitted to the external server 102 via the first fire alarm server 1 operating as the main system. Also, in this example, the event information from the disaster prevention receiver 101 is stored and accumulated in the first fire alarm server 1 operating as the main system and the second fire alarm server 2 operating as the sub-system.

[0044] (Operation - When the second fire alarm server operates as the main system) 3, when the second fire alarm server 2 operates as the main system, the second fire alarm server 2 operates as the main system described above, while the first fire alarm server 1 operates as the sub-system. The specific operations are as described above, so a detailed description will be omitted.

[0045] (process) Next, the secondary system side operation monitoring process executed by the communication system 100 configured as above will be described.

[0046] FIG. 4 is a flowchart of the secondary system operation monitoring process (steps will be abbreviated as "S" in the following explanation of each process). The secondary system operation monitoring process is a process executed by a fire alarm server operating as a secondary system, and is a process for switching operation as a primary system or a secondary system based on, for example, a malfunction of the primary system. The secondary system operation monitoring process can be executed at any timing, but for example, it is executed repeatedly by the fire alarm server operating as a secondary system (the same applies to the secondary system transmission monitoring process described in the modified example). Note that the processing entity for each of the following steps is the control unit of each device.

[0047] Here, we will explain an example in which, for example, as shown in Figure 2, the first fire alarm server 1 operates as the main system and the second fire alarm server 2 operates as the sub-system, and a malfunction occurs in the first fire alarm server 1 operating as the main system.

[0048] First, in SA1 of FIG. 4, the second fire alarm server 2 operating as the sub-system determines whether or not the first fire alarm server 1 operating as the main system is malfunctioning.

[0049] Specifically, the first fire alarm server 1 and the second fire alarm server 2 are configured to repeatedly transmit an alive signal (a signal to confirm whether or not there is a malfunction) to each other at regular time intervals (for example, every minute, etc.). Either the first fire alarm server 1 or the second fire alarm server 2 can confirm that the other fire alarm server is operating normally (i.e., not malfunctioning) by continuously receiving the alive signal from the other fire alarm server at regular time intervals, and makes a judgment based on this.

[0050] In detail, if the vital signal is not received a predetermined number of times (e.g., three times) in succession, it is determined that there is a malfunction (YES in SA1) and the process proceeds to SA2. On the other hand, if the vital signal is not received a predetermined number of times (e.g., three times) in succession (i.e., any case other than "YES in SA1"), it is determined that there is no malfunction (NO in SA1) and the process ends.

[0051] Here, for example, if a malfunction occurs in some of the components of the first fire alarm server 1 operating as the main system, causing it to malfunction and become unable to send a life / death signal, and if the second fire alarm server 2 operating as the sub-system does not receive a predetermined number of consecutive life / death signals from the first fire alarm server 1, it will determine that the first fire alarm server 1 is malfunctioning (YES in SA1) and proceed to SA2.

[0052] Next, at SA2 in FIG. 4, the second fire alarm server 2 operating as the secondary system determines whether or not it will be promoted to the primary system.

[0053] Specifically, the fire alarm server operating as a secondary system transmits a promotion request to request approval to operate as the primary system, and makes a decision based on the response from the primary system. If there is no response within a predetermined time (for example, 1 to 5 seconds), or if there is a response indicating approval, it is determined that the system will be promoted to the primary system (YES in SA2), and the process proceeds to SA3. On the other hand, if the primary system is in a state where it can operate normally and there is a response from the primary system indicating refusal, it is determined that the system will not be promoted to the primary system (NO in SA2), and the process ends. Note that "receiving a response" here may also be interpreted as meaning that a signal indicating approval or refusal is sent.

[0054] Here, for example, if the second fire alarm server 2 transmits a promotion request and there is no response within a predetermined time, it is determined that the second fire alarm server 2 will be promoted to the main system (YES in SA2), and the process proceeds to SA3.

[0055] Next, in SA3 of FIG. 4, the second fire alarm server 2 operating as a sub-system starts operating as a main system after transmitting past event information.

[0056] Specifically, while the above-mentioned life / death signal is not being received, the fire alarm server operating as the main system may be malfunctioning, and event information received while the life / death signal is not being received may not be transmitted to the external server 102. Therefore, in order to prevent event information from being omitted from transmission to the external server 102, the second fire alarm server 2 operating as the sub-system identifies the event information and identification information received while the above-mentioned life / death signal is not being received from the event information recorded as event history information in the recording unit 22, and generates an alarm-side event signal including the identified event information and identification information and transmits it to the external server 102.

[0057] The method for identifying the received event information and identification information while the alive signal is not received is arbitrary, but for example, the event information and identification information may be identified by focusing on the time information associated with the event information and identification information.

[0058] Fig. 5 is a diagram for explaining the operation. For example, as shown in Fig. 5, when event information A is received in a case where alive or dead signals have not been received a predetermined number of times in succession, the event information A and its identification information are identified, and a reporting-side event signal including the identified event information A and its identification information is generated and transmitted.

[0059] It is also possible that the event information and identification information will not be received while the alive signal is not being received, but in this case, no information will be transmitted.

[0060] Thereafter, the second fire alarm server 2, which has been operating as a secondary system, switches itself to the primary system and starts operating as the primary system.

[0061] It is possible that the malfunction of the first fire alarm server 1 will be resolved and restored thereafter, and so that the first fire alarm server 1 will operate as a secondary system upon this recovery, the second fire alarm server 2, which has started operating as the primary system, may continue to send a signal to the first fire alarm server 1 to cause it to start operating as a secondary system. This concludes the explanation of the secondary system side operation monitoring process.

[0062] (Effects of the embodiment) Thus, according to this embodiment, by providing the first fire alarm server 1 and the second fire alarm server 2, for example, the fire alarm servers can be made redundant, thereby making it possible to reliably transmit event information.

[0063] Furthermore, if the sub-system determines that the main system is malfunctioning, it can reliably transmit, for example, event information by transmitting event information that may not yet have been transmitted to the external server 102.

[0064] [Modifications to the embodiment] Although the embodiments of the present invention have been described above, the specific configurations and means of the present invention can be modified and improved as desired within the scope of the technical ideas of the inventions set forth in the claims. Such modifications will be described below.

[0065] (About the problem to be solved and the effects of the invention) First, the problems that the invention aims to solve and the effects of the invention are not limited to those described above, and may vary depending on the implementation environment of the invention and the details of the configuration, and may solve only some of the problems described above or achieve only some of the effects described above.

[0066] (Regarding decentralization and integration) Furthermore, the above-described configuration is a functional concept, and does not necessarily have to be physically configured as shown in the drawings. In other words, the specific form of distribution or integration of each part is not limited to that shown in the drawings, and all or part of it can be functionally or physically distributed or integrated in any unit.

[0067] (Transmission monitoring process on the secondary system side) Furthermore, the communication system 100 of the above embodiment may be configured to execute a secondary system side transmission monitoring process.

[0068] 6 is a flowchart of the transmission monitoring process on the secondary system side. The transmission monitoring process on the secondary system side is executed by the fire alarm server operating as the secondary system, and is a process for switching operation as the primary system or the secondary system based on, for example, non-transmission of event information from the primary system.

[0069] Here, we will explain an example in which, for example, as shown in Figure 2, the first fire alarm server 1 is operating as the main system and the second fire alarm server 2 is operating as the sub-system, and event information is not transmitted to the first fire alarm server 1 operating as the main system.

[0070] First, in SB1 of Fig. 6, the second fire alarm server 2 operating as a sub-system determines whether or not one life / death signal has been received. If it is determined that a life / death signal has not been received (YES in SB1), the process proceeds to SB2. On the other hand, if it is determined that a life / death signal has not been received (NO in SB1), SB1 is executed again.

[0071] Here, for example, if a malfunction occurs in some of the components of the first fire alarm server 1 operating as the main system and one life / death signal is not sent, the second fire alarm server 2 operating as the sub-system determines that a life / death signal has not been received from the first fire alarm server 1 (YES in SB1) and transitions to SB2.

[0072] Next, at SB2 in FIG. 6, the second fire alarm server 2 operating as a sub-system determines whether or not it has received event information during the period in which it has not received an alive or dead signal.

[0073] Specifically, if the event information recorded as event history information in the recording unit 22 contains event information received during the period when the above-mentioned alive or dead signal was not received, it is determined that the event information was received during the period when the alive or dead signal was not received (YES in SB2), and the process proceeds to SB3. On the other hand, if the event information recorded as event history information does not contain event information received during the period when the above-mentioned alive or dead signal was not received, it is determined that the event information was not received during the period when the alive or dead signal was not received (NO in SB2), and the process ends. Note that the process here may be performed focusing on time information associated with the event information.

[0074] Fig. 7 is a diagram for explaining the operation. For example, as shown in Fig. 7, if event information B is received during a period when no alive or dead signal is received, since the event information B is recorded as event history information, it is determined that the event information was received during a period when no alive or dead signal was received (YES in SB2), and the process proceeds to SB3.

[0075] Next, at SB3 in Figure 6, the second fire alarm server 2 operating as a secondary system determines whether the primary system has transmitted the event information received during the period when the vital sign signal was not received (i.e., determines whether there is any event information transmitted in the past from the disaster prevention receiver 101 that may not yet have been transmitted by the primary system).

[0076] Specifically, each fire alarm server is configured to transmit a response indicating whether or not it has transmitted event information when it receives an inquiry as to whether or not it has transmitted the event information. The second fire alarm server 2, operating as a sub-system, sends an inquiry to the first fire alarm server 1, including an identification signal for identifying event information B in Fig. 7, and, if it receives a response indicating that it has transmitted the event information B, it determines that the event information received during the period when the alive / dead signal was not received was transmitted by the main system (YES in SB3), and terminates processing. On the other hand, if it does not receive a response indicating that it has transmitted event information B (i.e., if it does not receive any response or if it receives a response indicating that it has not transmitted event information B), it determines that the event information received during the period when it has not received the alive / dead signal was not transmitted by the main system (NO in SB3), and proceeds to SB4.

[0077] Next, in SB4 in Fig. 4, the second fire alarm server 2 operating as the secondary system determines whether or not it will be promoted to the primary system. Specifically, it performs the same process as in SA2 in Fig. 4.

[0078] Next, at SB5 in Fig. 4, the second fire alarm server 2 operating as the secondary system transmits past event information (specifically, event information received during the period when no alive signal was received), and then starts operating as the primary system. Specifically, it performs the same processing as at SA3 in Fig. 4. Here, for example, it generates an alarm-side event signal including event information B and identification information in Fig. 7 and transmits it to the external server 102. This concludes the explanation of the secondary-system-side transmission monitoring processing.

[0079] By configuring in this way, when the sub-system determines that there is event information that may not yet have been transmitted by the main system, it can transmit the event information, thereby enabling, for example, the event information to be transmitted reliably.

[0080] 6 may be interpreted as corresponding to "processing of determining whether or not there is event information that has been transmitted in the past from the disaster prevention receiver 101 that may not have been transmitted by the main system." Also, for example, YES in SB3 may be interpreted as corresponding to "a case where it is determined that there is no event information that has been transmitted in the past from the disaster prevention receiver 101 that may not have been transmitted by the main system." Also, for example, NO in SB3 may be interpreted as corresponding to "a case where it is determined that there is event information that has been transmitted in the past from the disaster prevention receiver 101 that may not have been transmitted by the main system."

[0081] (Regarding the event signal on the reporting side) Furthermore, the system may be configured to perform the following operations as the main or sub-system described in the above embodiment with reference to Figures 2 and 3. Figure 8 is a diagram for explaining the operations.

[0082] For example, as described above, the disaster prevention receiver 101 transmits a disaster prevention side event signal including event information such as "Fire breaks out in room 303" and identification information "ID001" that uniquely identifies the event information to the first fire alarm server 1 and the second fire alarm server 2.

[0083] In this case, the first fire alarm server 1 operating as the main system may be configured to transmit text information such as "Fire breaks out in room 303" to the external server 102 as information indicating the content of the event information.

[0084] In this case, the second fire alarm server 2 operating as a sub-system may be configured to transmit predetermined information such as "#" (preferably, one-character symbol information) to the external server 102 as information indicating that event information has been received from the disaster prevention receiver 101.

[0085] In this case, even if a malfunction occurs only in the main system and the external server 102 does not receive "Fire breaks out in room 303", it will still receive "#", making it possible to detect the malfunction on the main system side. On the other hand, even if a malfunction occurs only in the sub-system and the external server 102 does not receive "#", it will still receive "Fire breaks out in room 303", making it possible to provide services based on the contents of the event information.

[0086] In this configuration, the main system transmits information indicating the contents of the event information, and the sub-system transmits information indicating that it has received the event information. This makes it possible to make the external server 102 aware of the existence of the event information, even if, for example, the main system does not transmit information indicating the contents of the event information.

[0087] (Regarding the event signal on the reporting side) Furthermore, in the above embodiment, the reporting event signal has been described as including event information and identification information, but this is not limiting, and for example, the reporting event signal may include only event information.

[0088] (Other features) The primary system and secondary system of the above embodiment may also be configured to be automatically switched by any other method. For example, the line quality between the disaster prevention receiver 101 and each fire alarm server may be monitored by a known method, and the system with higher line quality may be switched to the primary system. Note that during periods when a relatively large number of events occur, such as during fire equipment inspections, the operation of the line quality monitoring function may be suppressed to improve performance related to communication of event information.

[0089] (About the components) 1 may be interpreted as being the disaster prevention receiver 101, the first fire alarm server 1, and the second fire alarm server 2. In other words, for example, the external server 102 may be interpreted as being not a component of the communication system 100 but a component of another system.

[0090] (Features) Furthermore, the features of the above-described embodiments and modifications may be combined in any manner.

[0091] (Addendum) The communication system of Appendix 1 is a communication system comprising a fire alarm system and a first fire alarm system and a second fire alarm system capable of communicating with the fire alarm system, wherein the fire alarm system transmits common event information to the first fire alarm system and the second fire alarm system, the first fire alarm system and the second fire alarm system are capable of communicating with an external system, one of the first fire alarm system or the second fire alarm system operates as a main system based on the event information from the fire alarm system, and the other of the first fire alarm system or the second fire alarm system operates as a sub-system based on the event information from the fire alarm system, and the main system transmits at least the event information to the external system.

[0092] The communication system of Supplementary Note 2 is the communication system described in Supplementary Note 1, in which the other system operating as the secondary system determines whether the primary system is malfunctioning, and if it determines that the primary system is malfunctioning, transmits to the external system the event information that has been transmitted from the fire alarm system in the past but which may not yet have been transmitted by the primary system.

[0093] The communication system of Supplementary Note 3 is a communication system described in Supplementary Note 1 or 2, in which the other system operating as the secondary system determines whether or not there is any event information among the event information previously transmitted from the fire alarm equipment that may not yet have been transmitted by the primary system, and if it determines that such event information exists, transmits the event information.

[0094] The communication system of Supplementary Note 4 is a communication system described in any one of Supplementary Notes 1 to 3, wherein one of the systems operating as the main system transmits information indicating the content of the event information to the external system, and the other system operating as the sub-system transmits information indicating that it has received the event information from the fire alarm equipment to the external system.

[0095] (Effect of supplementary notes) According to the communication system described in Appendix 1, by providing a first fire alarm system and a second fire alarm system, for example, the fire alarm system can be made redundant, thereby making it possible to reliably transmit event information.

[0096] According to the communication system described in Appendix 2, when the secondary system determines that the primary system is malfunctioning, it is possible to reliably transmit, for example, event information by transmitting event information that may not yet have been transmitted to an external system.

[0097] According to the communication system described in Appendix 3, when the secondary system determines that there is event information that may not yet have been transmitted by the primary system, the secondary system transmits the event information, thereby enabling, for example, the event information to be transmitted reliably.

[0098] According to the communication system described in Supplementary Note 4, the main system transmits information indicating the contents of the event information, and the sub-system transmits information indicating that it has received the event information, so that, for example, even if the information indicating the contents of the event information is not transmitted from the main system, it is possible to make the external system aware of the existence of the event information itself. For example, in a system in which the external system notifies an individual's terminal of the information based on the received information, the content of the event information and / or information indicating the occurrence of the event information is notified to the individual's terminal, so that the annoyance of multiple displays of large amounts of "event information content" can be avoided, and the occurrence of an event can be ascertained based on either the "content of the event information" or the "existence of the event information itself." [Explanation of symbols]

[0099] 1. First fire alarm server 2 Second fire alarm server 11 Communications Department 12 Recording section 13 Control Unit 21 Communications Department 22 Recording section 23 Control Unit 100 Communication Systems 101 Disaster Prevention Receiver 102 External Server

Claims

[Claim 1] A communication system including a fire alarm system, and a first fire alarm system and a second fire alarm system capable of communicating with the fire alarm system, the fire alarm system transmits common event information to the first fire alarm system and the second fire alarm system; the first fire alarm system and the second fire alarm system are capable of communicating with an external system, one of the first fire alarm system and the second fire alarm system operates as a primary system based on the event information from the fire alarm equipment; the other of the first fire alarm system and the second fire alarm system operates as a sub-system based on the event information from the fire alarm equipment; The main system at least transmits the event information to the external system; the one system operating as the primary system transmitting an alive signal to the other system operating as the secondary system; The other system operating as the secondary system determines whether the primary system is malfunctioning based on the vital / dead signal, and if it determines that the primary system is malfunctioning, transmits to the external system the event information received since the vital / dead signal was last received normally. Communication system.

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