JP2019033324A - Wireless device and program - Google Patents

Abstract

To provide a technique for transferring a packet signal in consideration of a difference in the number of routes of transfer.SOLUTION: A wireless device 10 is included in a mesh network for transferring a packet signal in a flooding manner. A receiving unit 52 receives a packet signal. A control unit 24 controls transfer of the packet signal received by the receiving unit 52. A transmission unit 50 transmits a packet signal in accordance with control of transfer by the control unit 24. The control unit 24 suppresses the transfer of a packet signal of a destination corresponding to the same packet signal as the number of times of receiving of the same packet signal in the receiving unit 52.SELECTED DRAWING: Figure 3

Description

  The present invention relates to communication technology, and more particularly, to a wireless device and a program for transferring a packet signal by a flooding method.

  In a multi-hop communication system including a plurality of wireless devices, a packet signal transmitted from one wireless device is transferred by another wireless device and received by a destination wireless device. The communication path of the multi-hop communication system is formed in a mesh shape in which a plurality of wireless devices are connected in a mesh shape, for example. When transmitting a packet signal, a wireless device serving as a starting point of packet signal transfer sets an upper limit value of the number of relay transmissions as a relay count value. When another wireless device relays and transmits a packet signal, a value obtained by subtracting 1 from the relay count value is set as a new relay count value (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2006-012867

  By setting the upper limit value of the number of relay transmissions, the repetition of the transfer is suppressed, and the increase in traffic is suppressed. Such control is unified over the entire network. On the other hand, a plurality of wireless devices are generally not evenly distributed and there are portions that are densely arranged and portions that are roughly arranged. In such a case, the number of transfer paths in the former tends to be large in the latter. Therefore, transfer control considering such differences is required.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a technique for transferring a packet signal in consideration of a difference in the number of transfer paths.

  In order to solve the above problems, a radio apparatus according to an aspect of the present invention is a radio apparatus included in a mesh network that transfers a packet signal by a flooding method, and a reception unit that receives the packet signal and a reception unit that receives the packet signal A control unit that controls the transfer of the packet signal, and a transmission unit that transmits the packet signal in accordance with the transfer control by the control unit. The control unit suppresses transfer of a destination packet signal corresponding to the same packet signal as the number of receptions of the same packet signal in the reception unit increases.

  It should be noted that any combination of the above-described constituent elements and a conversion of the expression of the present invention between a method, an apparatus, a system, a recording medium, a computer program, etc. are also effective as an aspect of the present invention.

  According to the present invention, packet signals can be transferred in consideration of the difference in the number of transfer paths.

It is a figure which shows the structure of the radio | wireless communications system which concerns on an Example. It is a figure which shows another structure of the radio | wireless communications system which concerns on an Example. It is a figure which shows the structure of the radio | wireless apparatus of FIG. 1 and FIG. It is a figure which shows the format of the packet signal used in the radio | wireless communications system of FIG. 1 and FIG. It is a figure which shows the data structure of the database memorize | stored in the memory | storage part of FIG. 4 is a flowchart showing a procedure for measuring the number of packet signals by the wireless device of FIG. 3. 4 is a flowchart showing a setting procedure of packet signal transfer by the wireless device of FIG. 3.

  Before describing the present invention in detail, an outline will be described. The embodiment relates to a wireless communication system of a mesh network configured by a plurality of wireless devices. Each wireless device is mounted on, for example, a control device and a plurality of controlled devices in an illumination system controlled by wireless communication. In the lighting system, when the communication distance from the control device to the controlled device is equal to or greater than a certain distance, the packet signal is transmitted by multi-hop communication by a wireless device mounted on the controlled device arranged between them. When performing multi-hop communication in a mesh network, a flooding scheme is used. On the other hand, a plurality of wireless devices are not generally distributed evenly, and there are portions that are densely arranged and portions that are roughly arranged depending on the position where the controlled device is to be installed. . When the flooding method is executed under such circumstances, there are the following problems.

  In the portion where the wireless devices are densely arranged, the number of transfer paths between the wireless devices is large, so that one packet signal is transferred by many routes. Therefore, the amount of traffic increases, and packet signal collisions easily increase due to traffic congestion. On the other hand, in a portion where wireless devices are roughly arranged, the number of transfer paths between the wireless devices is small, so that one packet signal is transferred through a limited route. Therefore, when the transfer of the packet signal is suppressed, the packet signal is difficult to reach due to an error in the packet signal. This is a decrease in the communication success rate, leading to a decrease in communication reliability.

  In order to cope with this, the radio apparatus included in the radio communication system according to the present embodiment determines the number of times of reception of the same packet signal received from the radio apparatus serving as a transfer origin (hereinafter referred to as “originator radio apparatus”). measure. It can be said that the number of routes to the radio apparatus increases as the number of receptions of the same packet signal increases. This radio apparatus measures the number of receptions of the same packet signal for various origin radio apparatuses. When such a measurement result is stored, when the wireless device receives a packet signal to be transferred, the wireless device has the same starting point as the wireless device that is the destination of the packet signal (hereinafter referred to as “destination wireless device”) Obtain the number of receptions for the wireless device. The radio apparatus suppresses the transfer when the number of receptions is equal to or greater than the threshold, and increases the transfer when the number of receptions is less than the threshold. Thereby, the congestion reduction and the improvement of communication reliability in the mesh network are realized.

  FIG. 1 shows a configuration of a wireless communication system 100. The wireless communication system 100 includes a first wireless device 10a to a twelfth wireless device 10l collectively referred to as a wireless device 10. The number of wireless devices 10 is not limited to “12”. When the wireless communication system 100 is used in a lighting system, one of the plurality of wireless devices 10 is mounted on the control device, and the remaining wireless devices 10 are mounted on the controlled device. At least a part of the control device and the controlled device is fixed to the ceiling or the like. The plurality of wireless devices 10 form a mesh network and perform multi-hop communication by a flooding method.

  FIG. 2 shows another configuration of the wireless communication system 100. This shows a configuration of the wireless communication system 100 including a portion where the wireless devices 10 of FIG. 1 are densely arranged and a portion where the wireless devices 10 are roughly arranged. For example, the fifth radio apparatus 10e and the sixth radio apparatus 10f are arranged densely, and the eighth radio apparatus 10h is arranged roughly. Since the processing in the wireless communication system 100 is common to FIG. 1 and FIG. 2, here, using FIG. 1 and FIG. 2, (1) packet signal transmission, (2) packet signal reception, (3) The measurement will be described in the order of measurement of the number of receptions and (4) packet signal transfer.

(1) Transmission of packet signal When data to be transmitted is generated, any one of the radio apparatuses 10 generates a packet signal including the data. The wireless device 10 that generates the packet signal corresponds to the above-described origin wireless device, and the wireless device 10 that is the destination of the packet signal corresponds to the above-described destination wireless device. In the packet signal, an ID (Identification) (hereinafter referred to as “starting point ID”) for identifying the wireless device 10 that is the starting point of the packet signal transfer and a wireless device 10 that is the destination of the packet signal are identified. ID (hereinafter referred to as “destination ID”). The originating wireless device transmits a packet signal. The packet signal is transferred by a flooding method in the mesh network. Here, the packet signal includes a TTL value which is a value indicating the number of times transfer is possible. When the destination ID included in the packet signal is different from the ID of the own wireless device 10, the wireless device 10 that has received the packet signal transfers the packet signal if the TTL value is “1” or more, and the TTL value is “0”. ", The packet signal is not transferred. The wireless device 10 decrements the TTL value by “1” at the time of transfer.

(2) Reception of the packet signal When the wireless device 10 receiving the packet signal has the same destination ID included in the packet signal as the ID of the own wireless device 10, the wireless device 10 performs reception processing on the packet signal, Data included in the packet signal is acquired. The wireless device 10 is the above-described destination wireless device, and the control device or the controlled device on which the destination wireless device is mounted may execute processing according to the data.

(3) Measurement of the number of receptions When one wireless device 10 is connected to a plurality of other wireless devices 10, a plurality of paths for transferring packet signals are formed in the one wireless device 10. In such a case, the packet signal reaches one wireless device 10 through each of a plurality of paths. One radio | wireless apparatus 10 receives the same packet signal which passed the some path | route several times. Therefore, one wireless device 10 measures the number of receptions of the same packet signal for each starting point ID.

  In FIG. 2, when the first radio apparatus 10a is the origin radio apparatus and the ninth radio apparatus 10i is the destination radio apparatus, the densely arranged part of the fifth radio apparatus 10e is the second radio apparatus 10b, The same packet signal transferred from the third radio apparatus 10c and the fourth radio apparatus 10d is received. Further, the roughly arranged part of the eighth radio apparatus 10h receives the same packet signal transferred from the seventh radio apparatus 10g. Therefore, the number of receptions at the fourth radio apparatus 10d is greater than the number of receptions at the eighth radio apparatus 10h.

  Thus, it can be said that the number of receptions indicates the number of routes input to one radio apparatus 10. One radio | wireless apparatus 10 performs the same process with respect to various origin radio | wireless apparatuses. Further, each of the plurality of wireless devices 10 performs similar processing. As a result, each wireless device 10 stores a plurality of correspondence relationships between the originating wireless device and the number of receptions. This corresponds to the fact that each wireless device 10 acquires a plurality of correspondence relationships between the origin wireless device and the number of routes.

(4) Transfer of Packet Signal As described above, the wireless device 10 that has received the packet signal has a TTL value of “1” or more when the destination ID included in the packet signal is different from the ID of the own wireless device 10. The TTL value included in the packet signal is decremented by “1”, and then the packet signal is transferred. At that time, the wireless device 10 refers to a plurality of correspondence relationships that have already been stored, and acquires the number of times of reception for the originating wireless device having the same ID as the destination ID included in the packet signal. This corresponds to acquiring the number of routes output from the wireless device 10.

  In FIG. 2, when the ninth wireless device 10 i is a source wireless device and the first wireless device 10 a is a destination wireless device, each wireless device 10 arranged between them receives the number of receptions for the first wireless device 10 a. To get. That is, they acquire the number of receptions after replacing the starting wireless device in the stored correspondence relationship with the destination wireless device. When the number of receptions is equal to or greater than the threshold value, the wireless device 10 suppresses transfer because the number of paths is large and congestion is likely to occur. When the number of receptions is less than the threshold value, the wireless device 10 increases transfer because the number of paths is small and the packet signal is difficult to reach. For example, the former corresponds to the process in the fifth radio apparatus 10e, and the latter corresponds to the process in the eighth radio apparatus 10h. A specific example of transfer suppression and increase will be described later. On the other hand, if the destination ID included in the packet signal is different from the ID of the own wireless device 10, the wireless device 10 that has received the packet signal discards the packet signal without transferring it if the TTL value is “0”. .

  FIG. 3 shows the configuration of the wireless device 10. The wireless device 10 includes a communication unit 20, a processing unit 22, a control unit 24, and a storage unit 26. The communication unit 20 includes a transmission unit 50 and a reception unit 52, the processing unit 22 includes a packet signal generation unit 30, a packet signal processing unit 32, and a transfer processing unit 34, and the control unit 24 includes a measurement unit 40 and an extraction unit. 42 and a setting unit 44. Here, (1) transmission of packet signal, (2) reception of packet signal, (3) measurement of the number of receptions, and (4) transfer of packet signal will be described in this order.

(1) Transmission of packet signal When the wireless device 10 is a starting wireless device, the packet signal generation unit 30 of the wireless device 10 generates a packet signal. FIG. 4 shows a format of a packet signal used in the wireless communication system 100. The packet signal includes the already-described origin ID, destination ID, TTL value, and data to be transmitted. Here, a predetermined initial value is set as the TTL value. Further, the packet signal includes an authentication code and a sequence number. The authentication code is short information for authenticating a message which is data, and is also called a MAC (Message Authentication Code). The sequence number is a serial number assigned to data in order to specify the order of data. Since a known technique may be used for the authentication code and the sequence number, description thereof is omitted here. Returning to FIG. The packet signal generation unit 30 outputs the packet signal to the transmission unit 50. Transmitter 50 transmits the packet signal received from packet signal generator 30. The transmission unit 50 transmits a packet signal by a flooding method. Since a known technique may be used for the communication unit 20, the description thereof is omitted here.

(2) Reception of packet signal The receiving unit 52 in the wireless device 10 other than the originating wireless device receives the packet signal. The receiving unit 52 outputs the packet signal to the processing unit 22 and the control unit 24. The packet signal processing unit 32 extracts a destination ID included in the packet signal. When the extracted destination ID matches the ID of the own wireless device 10, the packet signal processing unit 32 processes the data included in the packet signal while using the authentication code and sequence number included in the packet signal. The process includes decoding and the like, but the description is omitted here. The packet signal processing unit 32 may output the processing result to a control device on which the wireless device 10 is mounted or a controlled device.

(3) Measurement of the number of receptions The measurement unit 40 receives a packet signal from the reception unit 52. The measuring unit 40 measures the number of receptions of the same packet signal in the receiving unit 52. Here, the measurement unit 40 executes, for example, one of the following three measurement methods. In the first measurement method, all bits of the received packet signal and the packet signal in the format shown in FIG. 4 are compared. The measuring unit 40 determines that the packet signals having the same bits are the same packet signal. That is, the measuring unit 40 measures the number of packet signals that match all the bits.

  In the second measurement method, a plurality of parameters of the received packet signal and the packet signal in the format shown in FIG. 4 are compared. For example, the measurement unit 40 determines that packet signals having the same “origin ID”, “destination ID”, and “sequence number” are the same packet signal. The combination of the plurality of parameters is not limited to “starting point ID”, “destination ID”, and “sequence number”. That is, the measurement unit 40 measures the number of packet signals that match a plurality of parameters. In the third measurement method, a single parameter of the received packet signal and the packet signal in the format shown in FIG. 4 is compared. For example, the measurement unit 40 determines that packet signals having the same authentication code are the same packet signal. That is, the measuring unit 40 measures the number of packet signals that match a single parameter.

  The measurement unit 40 measures the number of receptions for each starting point ID, and stores the correspondence between the starting point ID and the number of receptions in the storage unit 26. FIG. 5 shows the data structure of the database stored in the storage unit 26. As illustrated, the correspondence between the starting point ID and the number of receptions is stored together with the measurement date and time. Note that, when the measurement unit 40 measures the number of receptions based on a new packet signal with respect to the origin ID whose correspondence is already stored in the storage unit 26, the measurement unit 40 sets the number of receptions already stored to a new one. You may update with the frequency | count of reception. The measuring unit 40 may derive the reception count based on the already stored reception count and the new reception count, and may update the already stored reception count based on the derived reception count. Returning to FIG.

(4) Transfer of packet signal The receiving unit 52 in the wireless device 10 other than the originating wireless device receives the packet signal. The receiving unit 52 outputs the packet signal to the processing unit 22 and the control unit 24. The transfer processing unit 34 extracts a destination ID included in the packet signal. When the extracted destination ID does not match the ID of the own wireless device 10, the transfer processing unit 34 extracts a TTL value from the packet signal. When the TTL value is “0”, the transfer processing unit 34 determines the end of the transfer. On the other hand, when the TTL value is “1” or more, the transfer processing unit 34 determines transfer. At that time, the transfer processing unit 34 outputs the destination ID to the control unit 24.

  The extraction unit 42 receives the destination ID from the transfer processing unit 34. The extraction unit 42 extracts from the storage unit 26 the number of receptions corresponding to the starting point ID having the same value as the received destination ID. This is equivalent to obtaining the number of receptions corresponding to the originating wireless device for use in transferring a packet signal to the destination wireless device having the same ID as the originating wireless device. The extraction unit 42 outputs the extracted number of receptions to the setting unit 44. The setting unit 44 receives the number of receptions from the extraction unit 42. The setting unit 44 compares the threshold value stored in advance with the number of receptions. The setting unit 44 determines to suppress transfer when the number of receptions is equal to or greater than a threshold value. The first example of transfer suppression is not to transfer a packet signal. This corresponds to a transfer discard rate of 100%. A second example of transfer suppression is that the packet signal is not transferred stochastically. This corresponds to the transfer discard rate being set between 0% and 100%.

  A third example of transfer suppression is to reduce the number of continuous transmissions of the same packet signal. The continuous transmission of the same packet signal means that the same packet signal is transmitted again even though the error of the packet signal is not notified from the radio device 10 on the receiving side. For example, when the number of continuous transmissions is “3” at normal time, the number of continuous transmissions is set to “1” when the transfer is suppressed. On the other hand, the setting unit 44 increases packet signal transfer when the number of receptions is less than the threshold value. An example of an increase in transfer is to increase the number of continuous transmissions of the same packet signal.

  This suppresses the transfer by the radio apparatus 10 when the reception frequency of the same packet signal in the receiving unit 52 is equal to or greater than the threshold value, and transfers the radio packet by the radio apparatus 10 when the reception frequency is less than the threshold value. It is equivalent to increasing. That is, the setting unit 44 controls the transfer of the packet signal received by the reception unit 52 so that the transfer of the packet signal is suppressed as the number of receptions at the reception unit 52 increases. The setting unit 44 sets the determined content in the transfer processing unit 34.

  The transfer processing unit 34 determines transfer of the packet signal according to the contents set by the setting unit 44. At this time, the transfer processing unit 34 includes the TTL value obtained by subtracting “1” from the TTL value in the packet signal. The transfer processing unit 34 outputs the packet signal to the transmission unit 50, and the transmission unit 50 transmits the packet signal.

  Note that the setting unit 44 may determine to reduce the TTL value by 2 or more during transfer in order to suppress transfer. At this time, the transfer processing unit 34 includes the TTL value obtained by subtracting “2” from the TTL value in the packet signal. This corresponds to suppressing transfer by another wireless device 10 when the number of receptions is equal to or greater than a threshold value.

  The subject of the apparatus, system, or method in the present disclosure includes a computer. When the computer executes the program, the main function of the apparatus, system, or method according to the present disclosure is realized. The computer includes a processor that operates according to a program as a main hardware configuration. The processor may be of any type as long as the function can be realized by executing the program. The processor includes one or a plurality of electronic circuits including a semiconductor integrated circuit (IC) or an LSI (Large Scale Integration). The plurality of electronic circuits may be integrated on one chip or provided on a plurality of chips. The plurality of chips may be integrated into one device, or may be provided in a plurality of devices. The program is recorded on a non-transitory recording medium such as a ROM, an optical disk, or a hard disk drive that can be read by a computer. The program may be stored in advance in a recording medium, or may be supplied to the recording medium via a wide area communication network including the Internet.

  The operation of the wireless communication system 100 configured as above will be described. FIG. 6 is a flowchart illustrating a procedure for measuring the number of packet signals by the wireless device 10. When the receiving unit 52 has already received the same packet signal (Y in S10), the measuring unit 40 increments the number of receptions (S12). On the other hand, when the receiving unit 52 has not received the same packet signal (N in S10), the measuring unit 40 starts measuring the number of receptions (S14). If the receiving unit 52 receives a new packet signal (Y in S16), the process returns to step 10. If the receiving unit 52 does not receive a new packet signal (N in S16), the storage unit 26 stores the number of receptions (S18).

  FIG. 7 is a flowchart showing a setting procedure of packet signal transfer by the wireless device 10. The extraction unit 42 extracts the number of receptions (S20). If the number of receptions is equal to or greater than the threshold (Y in S22), the setting unit 44 determines the transfer suppression setting (S24). On the other hand, if the number of receptions is not greater than or equal to the threshold (N in S22), the setting unit 44 determines the transfer increase setting (S26).

  According to the present embodiment, since the number of receptions of the same packet signal is measured, the number of transfer paths can be estimated. Also, as the number of receptions of the same packet signal increases, transfer of the destination packet signal corresponding to the same packet signal is suppressed, so that the packet signal can be transferred in consideration of the difference in the number of transfer paths. In addition, because the number of receptions of the same packet signal increases as the number of receptions of the same packet signal increases with respect to the packet signal set as the transfer destination by another wireless device that is the origin of the transfer of the same packet signal, it is estimated from the number of receptions. Can be reflected in the transfer control.

  In addition, since forwarding is suppressed when the number of receptions of the same packet signal is equal to or greater than a threshold value, an increase in traffic volume can be suppressed even if the number of routes is large. Moreover, since the increase in traffic volume is suppressed, the occurrence of congestion can be suppressed. Since the transfer is increased when the number of receptions of the same packet signal is less than the threshold value, it is possible to suppress the packet signal from being easily reached due to an error in the packet signal even if the number of paths is small. Moreover, since it is suppressed that a packet signal becomes difficult to reach | attain, the fall of a communication success rate can be suppressed. In addition, since a decrease in communication success rate is suppressed, a decrease in communication reliability can be suppressed.

  Further, since the packet signal is not transferred when the number of receptions of the same packet signal is equal to or greater than the threshold value, the transfer can be suppressed. In addition, when the number of receptions of the same packet signal is equal to or greater than the threshold, the number of continuous transmissions of the same packet signal is reduced, so that transfer can be suppressed. Further, when the number of receptions of the same packet signal is smaller than the threshold value, the number of continuous transmissions of the same packet signal is increased, so that the transfer can be increased. In addition, when the number of receptions of the same packet signal is equal to or greater than the threshold value, the TTL value is reduced by 2 or more at the time of transfer, so that transfer can be suppressed.

  The outline of one embodiment of the present invention is as follows. A wireless device 10 according to an aspect of the present invention is a wireless device 10 included in a mesh network that transfers a packet signal by a flooding method, and includes a receiving unit 52 that receives the packet signal, and a packet signal received by the receiving unit 52. A control unit 24 that controls transfer and a transmission unit 50 that transmits a packet signal in accordance with the transfer control by the control unit 24 are provided. The control unit 24 suppresses transfer of a destination packet signal corresponding to the same packet signal as the number of receptions of the same packet signal in the reception unit 52 increases.

  The control unit 24 performs transfer as the number of receptions of the same packet signal in the reception unit 52 increases with respect to the packet signal in which the other wireless device 10 that is the starting point of transfer of the same packet signal is set as the transfer destination. It may be suppressed.

  The control unit 24 may suppress the transfer when the reception number of the same packet signal in the reception unit 52 is equal to or greater than the threshold value, and may increase the transfer when the reception number is less than the threshold value.

  The control unit 24 suppresses the transfer by the radio device 10 when the reception frequency of the same packet signal in the reception unit 52 is equal to or greater than the threshold value, and controls the radio device 10 when the reception frequency is less than the threshold value. Transfers may be increased.

  The control unit 24 may suppress transfer by another wireless device 10 when the reception number of the same packet signal in the reception unit 52 is equal to or greater than a threshold value.

  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. .

  In the present embodiment, the setting unit 44 determines whether to suppress or increase the transfer by comparing the number of receptions with one threshold value. However, the present invention is not limited to this. For example, the setting unit 44 determines a threshold value in a plurality of stages and compares the threshold values in the plurality of stages with the number of receptions to suppress the transfer stepwise or increase the number of times. You may decide. According to this modification, finer control can be executed.

  In the present embodiment, the setting unit 44 uses the number of receptions for the originating wireless device to determine control of packet signal transfer in which the originating wireless device becomes the destination wireless device. However, the present invention is not limited to this. For example, by transmitting the number of times of reception to the originating wireless device to the wireless device 10 on the originating wireless device side, the number of times of reception is used when determining control of packet signal transfer in the wireless device 10. May be. According to this modification, since the number of receptions is used in the wireless device 10 on the origin wireless device side, the control accuracy in the wireless device 10 can be improved.

  10 wireless devices, 20 communication units, 22 processing units, 24 control units, 26 storage units, 30 packet signal generation units, 32 packet signal processing units, 34 transfer processing units, 40 measurement units, 42 extraction units, 44 setting units, 50 Transmitter, 52 receiver, 100 wireless communication system.

Claims (6)

A wireless device included in a mesh network that transfers packet signals by a flooding method,
A receiver for receiving the packet signal;
A control unit for controlling transfer of the packet signal received by the receiving unit;
A transmission unit that transmits the packet signal in accordance with transfer control by the control unit;
The wireless device, wherein the control unit suppresses transfer of a destination packet signal corresponding to the same packet signal as the number of receptions of the same packet signal in the reception unit increases.   The control unit performs transfer as the number of times of reception of the same packet signal in the reception unit increases with respect to the packet signal in which the other wireless device that is the starting point of transfer of the same packet signal is set as a transfer destination. The radio apparatus according to claim 1, wherein the radio apparatus is suppressed.   The control unit suppresses transfer when the number of receptions of the same packet signal in the reception unit is equal to or greater than a threshold, and increases transfer when the number of receptions is less than the threshold. The wireless device according to claim 1 or 2.   The control unit suppresses transfer by the wireless device when the number of receptions of the same packet signal at the reception unit is equal to or greater than a threshold, and transfers by the wireless device when the number of receptions is less than the threshold. The wireless device according to claim 3, wherein the wireless device is increased.   The wireless device according to claim 3, wherein the control unit suppresses transfer by another wireless device when a reception frequency of the same packet signal in the reception unit is equal to or greater than a threshold value. A program in a wireless device included in a mesh network that transfers a packet signal by a flooding method,
Receiving a packet signal;
Controlling the transfer of the received packet signal;
Transmitting the packet signal according to transfer control, and
The step of controlling is a program for causing a computer to suppress transfer of a destination packet signal corresponding to the same packet signal as the number of receptions of the same packet signal increases.

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