JP2016164763A - Wireless device and communication system using the same - Google Patents

Abstract

The present invention provides a technology for guiding to an evacuation site while suppressing an increase in facility scale.
A receiving unit receives a signal. The transmission unit 34 transmits a signal when the destination of the received signal is the wireless device 20. The storage unit 24 stores a history of received signals. Based on the history stored in the storage unit 24 and the received signal, the prediction unit 26 predicts the reception timing of the signal that is the destination of the radio apparatus 20. Even when the timing predicted by the prediction unit 26 arrives, the instruction unit 28 instructs the transmission unit 34 to transmit a signal when the reception unit 32 does not receive the signal to which the wireless device 20 is a destination. .
[Selection] Figure 3

Description

  The present invention relates to a communication technique, and more particularly, to a radio apparatus that transmits and receives a predetermined signal and a communication system using the same.

  When an emergency such as a fire occurs, it is required to display an evacuation direction to enable quick and safe evacuation behavior. For this purpose, a communication transmission line is laid along the route to the evacuation exit, and a plurality of guidance display devices are connected to the communication transmission line (see, for example, Patent Document 1).

JP2013-242687A

  In order to indicate the direction of evacuation in a building or the like, it was possible to lay a communication transmission line in a route such as a corridor. However, in order to indicate the direction of evacuation outdoors, laying a communication transmission path increases the scale of facilities and the construction scale.

  This invention is made | formed in view of such a condition, The objective is to provide the technique guided to an evacuation site, suppressing the increase in an equipment scale.

  In order to solve the above-described problem, a wireless device according to an aspect of the present invention is a wireless device that transfers a signal, a receiving unit that receives a signal from another wireless device, and a destination of the signal received by the receiving unit Based on the signal received by the receiver, the transmitter that transmits the signal, the memory that stores the history of the signal received by the receiver, the history that is stored in the memory, and A prediction unit that predicts reception timing of a signal to which the radio apparatus is a destination, and a signal to which the radio apparatus is a destination is not received in the reception unit even when the timing predicted by the prediction unit arrives And an instruction unit for instructing the transmission unit to transmit a signal.

  Another aspect of the present invention is also a wireless device. This device is a wireless device that transfers signals and is connected to a guide light, is a signal from another wireless device, and is a signal instructing to turn on and turn off the guide light , A transmission unit that transmits a signal when the destination of the signal received at the reception unit is the wireless device, and a synchronization unit that acquires timing synchronized with another wireless device. Based on the timing acquired in the synchronization unit, the guide light is turned on and turned off at regular intervals after the reception unit receives the signal.

  Yet another embodiment of the present invention is a communication system. The communication system includes a plurality of wireless devices that transfer signals. At least one of the plurality of wireless devices includes a reception unit that receives a signal from another wireless device, and a transmission unit that transmits a signal when the destination of the signal received by the reception unit is the wireless device. Based on the history stored in the storage unit, the history stored in the storage unit, and the signal received in the reception unit, the wireless device predicts the reception timing of the signal destined for the destination. An instruction unit for instructing the transmission unit to transmit a signal when the reception unit does not receive the signal to which the wireless device is destined even when the timing predicted by the prediction unit arrives; Prepare.

  Yet another aspect of the present invention is also a communication system. The communication system includes a plurality of wireless devices that transfer signals and are connected to a guide light. At least one of the plurality of wireless devices is a signal received from another wireless device, and receives a signal instructed to turn on and turn off the guide light, and When the destination of the received signal is the wireless device, a transmission unit that transmits a signal and a synchronization unit that acquires timing synchronized with another wireless device are provided. Based on the timing acquired in the synchronization unit, the guide light is turned on and turned off at regular intervals after the reception unit receives the signal.

  It should be noted that any combination of the above-described constituent elements and a representation of the present invention converted between a method, an apparatus, a system, and the like are also effective as an aspect of the present invention.

  According to the present invention, it is possible to guide to an evacuation site while suppressing an increase in facility scale.

It is a figure which shows the partial structure of the illumination equipment which concerns on Example 1 of this invention. FIGS. 2A to 2I are diagrams illustrating the configuration of the guide light system according to the first embodiment of the present invention. It is a figure which shows the structure of the radio | wireless apparatus which concerns on Example 1 of this invention, and a guide light. FIGS. 4A to 4F are diagrams showing an outline of signal transfer by the wireless device of FIG. It is a figure which shows the data structure of the database memorize | stored in the memory | storage part of FIG. It is a flowchart which shows the process sequence by the radio | wireless apparatus of FIG. 3, and a guide light. It is a figure which shows the data structure of the database memorize | stored in the memory | storage part which concerns on Example 2 of this invention. It is a figure which shows the structure of the radio | wireless apparatus and guide light which concern on Example 3 of this invention. It is a flowchart which shows the process sequence by the radio | wireless apparatus of FIG. 8, and a guide light.

Example 1
Before describing the present invention in detail, an outline will be described. Embodiment 1 of the present invention relates to a guide light system including a plurality of guide lights installed along an evacuation route. Each of the plurality of guide lights is connected to a wireless device, and a signal is transmitted by multi-hop between the wireless devices. Therefore, one wireless device transmits a signal to the next wireless device, and when the next wireless device receives the signal, the wireless device further transmits a signal to the next wireless device. In this way, signals are transferred by a bucket relay system in a plurality of wireless devices. Also, the guide light connected to the wireless device receiving the signal is turned on and then turned off. That is, the guide light that is turned on is switched following signal transmission.

  FIG. 1 shows a partial configuration of a lighting equipment 18 according to Embodiment 1 of the present invention. The lighting equipment 18 includes a guide light 10, a crime prevention light 12, a power storage box 14, and a pole 16. In FIG. 1, a part of the pole 16 is shown, for example, a part about 4.5 m from the ground. A security light 12 is attached to the pole 16. The crime prevention light 12 is an electric light installed on a street or the like for the purpose of crime prevention, and has an irradiation range narrower than that of a road illumination light. The security light 12 is a living road through which an unspecified number of people pass at night, and is installed in a place where it is dark and hinders traffic, or where security is a concern. Depending on the situation of the installation location, the security light 12 may be laid on a power pole or a dedicated lighting pole may be installed.

  The electricity storage box 14 is attached to the pole 16. The storage box 14 stores a storage battery (not shown), and supplies power to the crime prevention light 12 and a guide light 10 described later when the power system fails. In addition, when it is not a power failure, the electrical storage box 14 and the guide light 10 are supplied with electric power from the electric power system. A guide light 10 is disposed below the storage box 14. The guide light 10 is turned off during normal times, and is repeatedly turned on and off during a disaster. A wireless device (not shown) is connected to the guide light 10. The communication by the wireless device and the operation of turning on / off the guide light 10 will be described later.

  Fig.2 (a)-(i) shows the structure of the guide light system 100 which concerns on Example 1 of this invention. As illustrated in FIG. 2A, the guide light system 100 includes first to eighth guide lights 10 a to 10 h that are collectively referred to as the guide light 10. In FIG. 2A, the number of guide lights 10 included in the guide light system 100 is “8”, but the present invention is not limited to this. Each of the plurality of guide lights 10 is installed as lighting equipment 18 as shown in FIG. 1 along a route toward the evacuation center. Here, a case where an evacuation center is provided in the vicinity of the eighth guide light 10h and residents are evacuated in the direction from the first guide light 10a to the eighth guide light 10h is illustrated. FIG. 2B to FIG. 2I show a state in which each guide light 10 is turned on or off, and a white circle corresponds to a lighting state, and a black circle corresponds to a light-off state. When a warning signal or the like is input to the first first guide light 10a, the first guide light 10a is turned on as shown in FIG. At that time, the other guide lights 10 are turned off.

  As shown by the arrow from the first guide light 10a to the second guide light 10b shown in FIG. 2 (a), the wireless device (not shown) connected to the first guide light 10a is connected to the second guide light 10b. A packet signal is transmitted to a wireless device (not shown). When the second guide light 10b receives the packet signal, the guide light 10 shifts to the state shown in FIG. In FIG.2 (c), the 1st guide light 10a connected to the radio | wireless apparatus which transmitted the packet signal transfers from lighting to light extinction. On the other hand, the 2nd guide light 10b connected to the radio | wireless apparatus which received the packet signal transfers to lighting from light extinction.

  As shown in FIG. 2A, such packet signals are transferred in the order of the second guide light 10b, the third guide light 10c,..., And the eighth guide light 10h. Further, as shown in FIG. 2D to FIG. 2I, only the guide light 10 that receives the packet signal is turned on in accordance with the transfer of the packet signal, and the other guide lights 10 are turned off. . As a result, the lit guide light 10 changes so as to encourage evacuation in the direction from the first guide light 10a to the eighth guide light 10h. The first guide light 10a is turned on again after a certain period of time has passed since it was turned off. Further, the wireless device connected to the first guide light 10a transmits a packet signal to the wireless device connected to the second guide light 10b. In this way, the above-described processing is repeated.

  FIG. 3 shows a configuration of the wireless device 20 and the guide light 10 according to the first embodiment of the present invention. The wireless device 20 includes a communication unit 22, a storage unit 24, a prediction unit 26, an instruction unit 28, and a reception unit 30, and the communication unit 22 includes a reception unit 32 and a transmission unit 34. The guide light 10 includes a processing unit 40 and an illumination unit 42. The wireless device 20 is stored in the power storage box 14 of FIG. 1 and transfers a packet signal as shown in FIG.

  The communication unit 22 executes communication corresponding to a predetermined wireless communication system. Here, any wireless communication system may be used, but it has at least a multi-hop transfer function between the wireless devices 20 as shown in FIG. An example of the wireless communication system is a wireless LAN (Local Area Network) system or a short-range wireless communication system. Here, communication by the plurality of radio apparatuses 20 will be described in more detail with reference to FIGS.

  FIGS. 4A to 4F are diagrams illustrating an overview of packet signal transfer by the wireless device 20. FIG. 4A shows five wireless devices 20 such as the first wireless device 20a to the fifth wireless device 20e. The first wireless device 20a to the fifth wireless device 20e are connected on a one-to-one basis from the first guide light 10a to the fifth guide light 10e shown in FIG. For the sake of clarity, it is assumed that the distance between adjacent wireless devices 20 is 25 m, and the reach distance of the packet signal transmitted from each wireless device 20 is 100 m. Therefore, as shown in FIG. 4B, the packet signal transmitted from the first radio apparatus 20a is received by the second radio apparatus 20b, which is the original destination, and the third radio apparatus 20c to the fifth radio apparatus 20e. Also received.

  Further, as shown in FIG. 4C, the packet signal transmitted from the second radio apparatus 20b is received by the third radio apparatus 20c which is the original destination, and the fourth radio apparatus 20d and the fifth radio apparatus 20e. Also received. Note that the packet signal is also received by the sixth wireless device 20f (not shown), but here, for the sake of clarity, the sixth wireless device 20g and the subsequent wireless device 20 are omitted from the description. Further, as shown in FIG. 4D, the packet signal transmitted from the third radio apparatus 20c is received by the fourth radio apparatus 20d which is the original destination and also received by the fifth radio apparatus 20e. As shown in FIG. 4E, the packet signal transmitted from the fourth radio apparatus 20d is received by the fifth radio apparatus 20e that is the original destination.

  As a result, the fifth radio apparatus 20e receives the packet signal transmitted from the fourth radio apparatus 20d and addressed to itself. The fifth radio apparatus 20e also receives packet signals transmitted from each of the first radio apparatus 20a to the fourth radio apparatus 20d and not addressed to itself. The description about FIG.4 (f) is mentioned later. Returning to FIG.

  The receiving unit 32 receives a packet signal from another wireless device 20. The received packet signal includes a combination of information indicating the transmission source and information indicating the destination. The information indicating the transmission source is information for identifying the wireless device 20 that transmitted the packet signal, and the information indicating the destination is identifying the wireless device 20 that should notify the data included in the packet signal. It is information for. For example, in FIG. 4E, information indicating the transmission source is information identifying the fourth wireless device 20d, and information indicating the destination is information identifying the fifth wireless device 20e. The receiving unit 32 outputs the combination to the storage unit 24, the prediction unit 26, and the instruction unit 28.

  The instruction unit 28 inputs a combination from the receiving unit 32. The instruction unit 28 extracts information indicating the destination from the combinations. The instruction unit 28 checks whether the information indicating the destination is the wireless device 20. The instruction unit 28 generates a packet signal when the destination of the packet signal received by the reception unit 32 is the radio apparatus 20, and instructs the transmission unit 34 to transmit the packet signal. At that time, the instruction unit 28 sets information for identifying the wireless device 20 as information indicating the transmission source, and sets information for identifying the predetermined wireless device 20 as information indicating the destination. The transmission unit 34 transmits the packet signal received from the instruction unit 28 in accordance with the instruction from the instruction unit 28.

  When the wireless device 20 corresponds to the first wireless device 20a of FIG. 4A, the reception unit 30 receives a signal such as an alarm for starting the operation of the guide light. A signal such as an alarm is input via a wired network or a wireless network (not shown), for example. Not limited to this, the reception unit 30 is provided with a button (not shown), and a signal such as an alarm may be input when the button is pressed down by an administrator. The reception unit 30 includes a sensor (not shown), and a signal such as an alarm may be input when the sensor detects the occurrence of a disaster such as an earthquake. Furthermore, a signal such as an alarm may be input when the power system fails. When receiving the signal, the receiving unit 30 instructs the instruction unit 28 to start the operation. When the instruction unit 28 receives the instruction, the instruction unit 28 generates a packet signal as described above.

  The storage unit 24 inputs the combination from the receiving unit 32. The storage unit 24 stores the received combination, thereby storing a combination of information indicating the transmission source and information indicating the destination according to the order of the packet signals received by the reception unit 32. This corresponds to storing a history of packet signals received by the receiving unit 32. FIG. 5 shows the data structure of the database stored in the storage unit 24. As illustrated, a transmission source column 200, a destination column 202, and a reception time column 204 are included. In the transmission source column 200 and the destination column 202, the above combinations are stored. The reception time column 204 indicates the reception time of the packet signal including the combination. Returning to FIG.

  The prediction unit 26 inputs the combination from the reception unit 32. Based on the combination history stored in the storage unit 24 and the combination input from the reception unit 32, the prediction unit 26 predicts the reception timing of the packet signal destined for the wireless device 20. Assuming that the wireless device 20 is the fifth wireless device 20e, according to the database of FIG. 5, a packet signal destined for the wireless device 20 is received at time “D”. On the other hand, the packet signal from the first radio apparatus 20a to the second radio apparatus 20b is received at time “A”. Therefore, it is expected that the wireless device 20 receives the destination packet signal after the time “DA” has elapsed since the packet signal from the first wireless device 20a to the second wireless device 20b has been received. Further, referring to another combination shown in FIG. 5, for example, after the time “D−B” has elapsed since the reception of the packet signal from the second radio apparatus 20b to the third radio apparatus 20c, the radio apparatus 20 Is expected to receive the destination packet signal.

  Therefore, the prediction unit 26 specifies the time “X” at which the currently received combination was received in the past from the database, and the time “Y” at which the wireless device 20 received the destination packet signal is also stored in the database. Identify from. The prediction unit 26 calculates “Y−X” to calculate a time difference until the wireless device 20 receives the destination packet signal. Further, the prediction unit 26 predicts the reception timing of the packet signal to which the radio apparatus 20 is a destination by adding a time difference to the reception time of the currently accepted combination. Note that the prediction unit 26 may predict the final reception timing by performing statistical processing such as averaging on the reception timing predicted from a plurality of combinations. The prediction unit 26 outputs the reception timing to the instruction unit 28.

  The instruction unit 28 receives the reception timing from the prediction unit 26. The instruction unit 28 checks whether a packet signal whose destination is the radio apparatus 20 is received by the reception timing. Since the confirmation process and the process in the case where the packet signal whose destination is the radio apparatus 20 is received are the same as before, the description thereof is omitted here. On the other hand, when the packet signal whose destination is the radio apparatus 20 is not received, that is, when the timing predicted by the prediction unit 26 arrives, the radio apparatus 20 does not receive the destination signal. The unit 28 instructs the transmission unit 34 to transmit a packet signal. This corresponds to generating pseudo reception timing. When receiving the instruction, the transmission unit 34 transmits the packet signal as described above.

  Here, the instruction unit 28 may add a predetermined period as a margin to the timing predicted by the prediction unit 26. At that time, the timing at which the margin is added is treated as the reception timing so far. When this process occurs, it corresponds to FIG. In FIG. 4F, the packet signal transmitted from the fourth radio apparatus 20d is not received by the fifth radio apparatus 20e. At that time, the fifth radio apparatus 20e estimates the reception timing based on the packet signals received in FIG. 4B to FIG. 4D, and transmits the packet signal.

  In addition, when the instruction unit 28 is connected to the processing unit 40 and instructs the transmission unit 34 to transmit a packet signal, the instruction unit 28 notifies the processing unit 40 accordingly. The processing unit 40 is connected to the illuminating unit 42. When receiving the notification from the processing unit 40, the processing unit 40 turns on the illuminating unit 42 for a predetermined period and turns off the illuminating unit 42 after a predetermined period has elapsed. That is, the processing unit 40 instructs to turn on the lighting unit 42 and to turn it off after the lighting based on the packet signal received by the receiving unit 32. In addition, when the instruction unit 28 instructs the transmission of the packet signal, the processing unit 40 continues lighting and lighting of the illumination unit 42 even if the reception unit 32 does not receive the packet signal addressed to the wireless device 20. Instruct to turn off. When the repetition of turning on and off the guide light 10 is terminated, a packet signal for instructing to turn off the light may be transferred between the plurality of wireless devices 20.

  This configuration can be realized in terms of hardware by a CPU, memory, or other LSI of any computer, and in terms of software, it can be realized by a program loaded in the memory, but here it is realized by their cooperation. Draw functional blocks. Accordingly, those skilled in the art will understand that these functional blocks can be realized in various forms only by hardware, or by a combination of hardware and software.

  The operation of the guide light system 100 having the above configuration will be described. FIG. 6 is a flowchart illustrating a processing procedure performed by the wireless device 20 and the guide light 10. The receiving unit 32 receives a packet signal addressed to another wireless device 20 (S10). The prediction unit 26 predicts the reception timing of the packet signal (S12). If the instruction unit 28 receives the packet signal (Y in S14), the instruction unit 28 acquires the reception timing (S16). If the instruction unit 28 does not receive the packet signal (N in S14), the instruction unit 28 generates a pseudo reception timing (S18). The transmission unit 34 transmits a packet signal (S20). The processing unit 40 turns on the illumination unit 42 (S22) and then turns off (S24).

  According to the present embodiment, the wireless device predicts the reception timing of the destination packet signal based on the received packet signal history, and does not receive the packet signal even when the reception timing is reached. However, since the packet signal is transmitted, the possibility that the transfer of the packet signal is interrupted can be reduced. In addition, since the possibility that the transfer of the packet signal is interrupted is reduced, wireless communication can be used to instruct the lighting of the guide light. In addition, since wireless communication is used to instruct the lighting of the guide light, it is possible to guide to an evacuation site while suppressing an increase in facility scale.

  Since the packet signal includes a combination of information indicating the transmission source and information indicating the destination, the reception timing can be predicted according to the history of the combination. Further, since the packet signal includes a combination of information indicating the transmission source and information indicating the destination, even when a new wireless device is added between adjacent wireless devices, the new Transfer via a wireless device can be realized. In addition, since the transfer via the new wireless device is realized, the path can be changed easily. In addition, even if the predicted timing arrives, the wireless device does not determine whether the destination packet signal is not received until a predetermined period elapses, so that the influence of processing delay or the like can be suppressed.

  The outline of one embodiment of the present invention is as follows. A radio apparatus 20 according to an aspect of the present invention is a radio apparatus 20 that transfers a signal, and a receiver 32 that receives a signal from another radio apparatus 20 and a destination of a signal received by the receiver 32 is the main radio. In the case of the device 20, the transmission unit 34 that transmits a signal, the storage unit 24 that stores the history of the signal received by the reception unit 32, the history that is stored in the storage unit 24, and the signal that is received by the reception unit 32 Originally, the prediction unit 26 that predicts the reception timing of the signal to which the radio apparatus 20 is the destination, and even if the timing predicted by the prediction unit 26 has arrived, And an instruction unit 28 that instructs the transmission unit 34 to transmit the signal when the signal is not received.

  The signal received by the reception unit 32 includes a combination of information indicating the transmission source and information indicating the destination, and the storage unit 24 stores information indicating the transmission source according to the order of the received signals as a history. And the information indicating the destination are stored, and the prediction unit 26 may predict the timing based on the combination stored in the storage unit 24 and the combination included in the signal received by the reception unit 32. Good.

  The instruction unit 28 is configured to transmit a transmission unit when the reception unit 32 does not receive a signal to which the wireless device 20 is a destination even after a predetermined period has elapsed since the timing predicted by the prediction unit 26 has arrived. 34 may be instructed to transmit a signal.

  The wireless device 20 is connected to the guide light 10, and when the signal received by the reception unit 32 instructs to turn on the guide light 10 and to turn it off, and the instruction unit 28 instructs transmission, Even if the signal is not received in the receiving unit 32, the guide light 10 may be turned on and turned off after the lighting.

  Yet another aspect of the present invention is a guide light system 100. The guide light system 100 includes a plurality of wireless devices 20 that transfer signals. At least one of the plurality of wireless devices 20 receives a signal when the receiving unit 32 receives a signal from the other wireless device 20 and the destination of the signal received by the receiving unit 32 is the wireless device 20. Based on the transmission unit 34 for transmission, the storage unit 24 for storing the history of the signal received by the reception unit 32, the history stored in the storage unit 24, and the signal received by the reception unit 32, the radio apparatus 20 The prediction unit 26 that predicts the reception timing of the destination signal, and the reception unit 32 does not receive the destination signal even if the timing predicted by the prediction unit 26 arrives. An instruction unit 28 that instructs the transmission unit 34 to transmit a signal.

(Example 2)
Next, Example 2 will be described. As in the first embodiment, the second embodiment relates to a guide light system including a plurality of guide lights installed along an evacuation route. Also in the second embodiment, each of the plurality of guide lights is connected to a wireless device, and a signal is transmitted between the wireless devices by multi-hop. . In the first embodiment, the packet signal includes a combination of information indicating the transmission source and information indicating the destination. On the other hand, in the second embodiment, information indicating the transmission source is included in the packet signal, but information indicating the destination is not included in the packet signal. This is because it is assumed that the transfer order of packet signals by a plurality of wireless devices 20 is known in all the wireless devices 20. Since the transfer order is known, the destination is automatically derived from the information indicating the transmission source. The lighting equipment 18, the guide lamp system 100, the wireless device 20, and the guide lamp 10 according to the second embodiment are the same type as those shown in FIGS. Here, the difference will be mainly described.

  The receiving unit 32 receives a packet signal, and the packet signal includes information indicating a transmission source. The instruction unit 28 recognizes in advance the relationship between the information indicating the transmission source included in the packet signal received by the reception unit 32 and the destination of the packet signal received by the reception unit 32. The instruction unit 28 determines whether the destination of the packet signal is the radio apparatus 20 from the information indicating the transmission source included in the packet signal received by the reception unit 32. If the destination of the packet signal is the wireless device 20, the instruction unit 28 executes the same processing as before.

  The storage unit 24 stores information indicating the transmission source as a history in accordance with the order of received packet signals. FIG. 7 shows a data structure of a database stored in the storage unit 24 according to the second embodiment of the present invention. As illustrated, a transmission source column 210 and a reception timing column 212 are included. In the transmission source column 200, information indicating the transmission source is stored. The reception timing column 212 indicates the reception time of the packet signal including information indicating the transmission source. Returning to FIG. The prediction unit 26 predicts timing based on information indicating the transmission source stored in the storage unit 24 and information indicating the transmission source included in the packet signal received by the reception unit 32.

  According to the present embodiment, since the packet signal includes information indicating the transmission source and does not include information indicating the destination, the amount of information to be included in the packet signal can be reduced. In addition, since the amount of information to be included in the packet signal is reduced, the error rate of the packet signal can be reduced. Further, the certainty of packet signal transfer can be improved.

  The outline of one embodiment of the present invention is as follows. The signal received by the reception unit 32 includes information indicating the transmission source, and the transmission unit 34 receives the information indicating the transmission source included in the signal received by the reception unit 32 and the reception unit 32. Whether or not the destination of the signal received by the receiving unit 32 is the present radio device 20 based on the information indicating the transmission source included in the signal received by the receiving unit 32, with the relationship with the signal destination being recognized in advance. The storage unit 24 stores information indicating the transmission source as the history in accordance with the order of the received signals, and the prediction unit 26 stores the information indicating the transmission source stored in the storage unit 24 and the reception unit 32. The timing may be predicted based on the information indicating the transmission source included in the signal received at.

(Example 3)
Next, Example 3 will be described. The third embodiment relates to a guide light system including a plurality of guide lights installed along an evacuation route as before. Until now, each of the plurality of guide lights has been connected to a wireless device, a signal is transmitted between the wireless devices by multi-hop, and the guide light to be lit is switched following the signal transmission. On the other hand, in the third embodiment, each wireless device is synchronized, and a signal that is a trigger for starting guidance is transmitted by multi-hop as before. Thereafter, each wireless device does not transmit a signal, and each guide light is periodically turned on and off. The lighting equipment 18 and the guide light system 100 according to the third embodiment are the same type as those in FIGS. Here, the difference will be mainly described.

  FIG. 8 shows a configuration of the wireless device 20 and the guide light 10 according to the third embodiment of the present invention. The wireless device 20 includes a communication unit 22, an instruction unit 28, a GPS reception unit 50, and a synchronization unit 52, and the communication unit 22 includes a reception unit 32 and a transmission unit 34. The guide light 10 includes a processing unit 40 and an illumination unit 42.

  The receiving unit 32 receives a packet signal that is a packet signal from another wireless device 20 and that instructs to turn on the guide light 10 and to turn it off after the lighting. This packet signal corresponds to the trigger signal described above. The packet signal includes a combination of information indicating the transmission source and information indicating the destination, as in the first embodiment. The receiving unit 32 outputs the instruction and the combination to the instruction unit 28.

  The instruction unit 28 inputs an instruction and a combination from the reception unit 32. In the same way as in the first embodiment, the instruction unit 28 generates a packet signal and instructs the transmission unit 34 to transmit the packet signal when the destination of the packet signal received by the reception unit 32 is the radio apparatus 20. . At that time, the instruction unit 28 includes an instruction in the packet signal. In addition, the instruction unit 28 outputs an instruction to the processing unit 40. The transmission unit 34 transmits the packet signal received from the instruction unit 28.

  The GPS receiver 50 receives a signal from a GPS satellite (not shown). The synchronization unit 52 acquires the timing synchronized with the GPS based on the signal received by the GPS reception unit 50. In addition, since the timing synchronized with the GPS is acquired also in the other wireless devices 20, this corresponds to acquiring the timing synchronized with the other wireless devices 20. The synchronization unit 52 outputs the synchronized timing to the processing unit 40.

  The processing unit 40 receives an instruction from the instruction unit 28 and receives a timing from the synchronization unit 52. Based on the timing acquired by the synchronization unit 52, the processing unit 40 turns on and turns off the lighting unit 42 at regular intervals after receiving an instruction. This fixed interval and the lighting period are common to all the guide lights 10. Therefore, the guidance operation shown in FIGS. 2B to 2I is possible. The end of the guidance operation is notified to each wireless device 20 by transferring a packet signal instructing to turn on and off the guide light 10. Since the transfer of the packet signal only needs to be used as before, the description is omitted here.

  The operation of the guide light system 100 having the above configuration will be described. FIG. 9 is a flowchart illustrating a processing procedure performed by the wireless device 20 and the guide light 10. If the reception unit 32 does not receive the packet signal (N in S50), the reception unit 32 stands by. If the receiving unit 32 receives the packet signal (Y in S50), the processing unit 40 causes the lighting unit 42 to periodically turn on and off (S52). If the receiving unit 32 does not receive the packet signal (N in S54), the process returns to step 52. If the receiving unit 32 receives the packet signal (Y in S54), the process is terminated.

  According to the present embodiment, the packet signal serving as a trigger for starting the guiding operation is transferred, but thereafter, the wireless device and the guide light are independently turned on and off and repeatedly turned on and off. Operation failure can be avoided. In addition, since each of the plurality of wireless devices is synchronized, the guiding operation can be executed even if the packet signal is not transferred. Further, since GPS is used to synchronize with other wireless devices, an increase in cost can be suppressed.

  The outline of one embodiment of the present invention is as follows. Another aspect of the present invention is also the wireless device 20. This device is a wireless device 20 that transmits a signal and is connected to the guide light 10, and is a signal from another wireless device 20, and the guide light 10 is turned on and turned off after the light is turned on. The receiving unit 32 that receives the instructed signal, and when the destination of the signal received by the receiving unit 32 is the wireless device 20, the timing synchronized with the transmitting unit 34 that transmits the signal and the other wireless device 20. And a synchronization unit 52 to be acquired. Based on the timing acquired by the synchronization unit 52, the guide light 10 is turned on and turned off at regular intervals after the signal is received by the reception unit 32.

  Yet another aspect of the present invention is also a guide light system 100. The guide light system 100 includes a plurality of wireless devices 20 that transfer signals and are connected to the guide light 10. At least one of the plurality of wireless devices 20 includes a receiving unit 32 that receives a signal that is a signal from another wireless device 20 and that instructs to turn on and turn off the guide light 10. When the destination of the signal received by the reception unit 32 is the wireless device 20, the transmission unit 34 that transmits a signal and the synchronization unit 52 that acquires the timing synchronized with the other wireless device 20 are provided. Based on the timing acquired by the synchronization unit 52, the guide light 10 is turned on and turned off at regular intervals after the signal is received by the reception unit 32.

  In the above, this invention was demonstrated based on the Example. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to each of those constituent elements or combinations of processing processes, and such modifications are also within the scope of the present invention. .

  DESCRIPTION OF SYMBOLS 10 Guide light, 12 Crime prevention light, 14 Power storage box, 16 pole, 18 Lighting equipment, 20 Wireless apparatus, 22 Communication part, 24 Memory | storage part, 26 Prediction part, 28 Instruction part, 30 Reception part, 32 Reception part, 34 Transmission part 40 processing unit, 42 illumination unit, 100 guide light system (communication system).

Claims (8)

A wireless device for transferring signals,
A receiver for receiving signals from other wireless devices;
A transmission unit that transmits a signal when the destination of the signal received by the reception unit is the wireless device;
A storage unit for storing a history of signals received by the reception unit;
Based on the history stored in the storage unit and the signal received by the receiving unit, a prediction unit that predicts the reception timing of the signal to which the wireless device is a destination;
An instruction unit that instructs the transmission unit to transmit a signal when the reception unit is not receiving a signal that is a destination even when the timing predicted by the prediction unit arrives.
A wireless device comprising: The signal received by the receiving unit includes a combination of information indicating a transmission source and information indicating a destination,
The storage unit stores, as a history, a combination of information indicating a transmission source and information indicating a destination according to the order of received signals,
The wireless device according to claim 1, wherein the prediction unit predicts timing based on a combination stored in the storage unit and a combination included in a signal received by the reception unit. The signal received by the receiving unit includes information indicating the transmission source,
The transmission unit recognizes in advance a relationship between information indicating a transmission source included in a signal received by the reception unit and a destination of the signal received by the reception unit, and the signal received by the reception unit From the information indicating the included transmission source, it is determined whether or not the destination of the signal received in the receiving unit is the wireless device,
The storage unit stores information indicating a transmission source according to the order of received signals as a history,
The prediction unit predicts timing based on information indicating a transmission source stored in the storage unit and information indicating a transmission source included in a signal received by the reception unit. Item 2. The wireless device according to Item 1.   The instruction unit is configured to transmit the transmission unit when the reception unit is not receiving a signal to which the wireless device is a destination even after a predetermined period has elapsed since the timing predicted by the prediction unit has arrived. The radio apparatus according to claim 1, wherein the radio apparatus is instructed to transmit a signal. The wireless device is connected to a guide light,
By the signal received in the receiving unit, the lighting of the guide light, the turn off following the lighting is instructed,
5. When the instruction unit instructs transmission, the guide light is turned on and turned off after the signal is received at the receiving unit. The wireless device according to item 1. A wireless device that transmits signals and is connected to a guide light,
A receiving unit that receives a signal from another wireless device and instructed to turn on the guide light and turn off following the lighting;
A transmission unit that transmits a signal when the destination of the signal received by the reception unit is the wireless device;
A synchronization unit that acquires timing synchronized with other wireless devices,
A wireless device, wherein the guide light is turned on and turned off at regular intervals after a signal is received by the receiver based on the timing acquired by the synchronization unit. A plurality of wireless devices for transferring signals;
At least one of the plurality of wireless devices is
A receiver for receiving signals from other wireless devices;
A transmission unit that transmits a signal when the destination of the signal received by the reception unit is the wireless device;
A storage unit for storing a history of signals received by the reception unit;
Based on the history stored in the storage unit and the signal received by the receiving unit, a prediction unit that predicts the reception timing of the signal to which the wireless device is a destination;
An instruction unit that instructs the transmission unit to transmit a signal when the reception unit is not receiving a signal that is a destination even when the timing predicted by the prediction unit arrives.
A communication system comprising: Comprising a plurality of wireless devices for transferring signals and connected to a guide light;
At least one of the plurality of wireless devices is
A receiving unit that receives a signal from another wireless device and instructed to turn on the guide light and turn off following the lighting;
A transmission unit that transmits a signal when the destination of the signal received by the reception unit is the wireless device;
A synchronization unit that acquires timing synchronized with other wireless devices,
A communication system, wherein the guide light is turned on and turned off at regular intervals after a signal is received by the receiver based on the timing acquired by the synchronization unit.

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