TWI664839B - Wireless communication system, wireless communication method and wireless communication program product - Google Patents

Abstract

The period calculation unit (22) of the master wireless device (2) calculates the amount of power that can be used by each child wireless device at the first time for each of the plurality of child wireless devices as the usable power amount. In addition, the cycle calculation unit (22) calculates an intermittent operation cycle as a calculation cycle. The intermittent operation cycle is a cycle of intermittent operation of sleeping after each sub-radio device operates, and each sub-radio device performs the intermittent operation for the first time. The amount of power consumption at the time does not exceed the amount of available power. In addition, the period calculation unit (22) selects, as the common period, a common calculation period to be applied to each of the plurality of child radios from the plurality of calculation periods calculated for the plurality of child radios. Furthermore, the period adjustment unit (23) of the parent wireless device (2) determines whether or not to apply the common period to each child wireless device of the plurality of child wireless devices based on the remaining storage capacity of the child wireless device selected as the common wireless device based on the calculated period. machine.

Description

   Wireless communication system, wireless communication method and wireless communication program product   

The invention relates to a wireless communication system, a wireless communication method and a wireless communication program product.

In a wireless communication system composed of a plurality of wireless devices such as a wireless sensor network, a method for achieving wide-range communication with a low-cost wireless device is required. As this method, a multi-hop wireless communication is adopted. The multi-hop wireless communication uses a plurality of wireless machines to relay packets to transfer data. In such a wireless communication system, in order to reduce the installation cost and improve the flexibility of the installation place, it is required that wiring for supplying power to the wireless device is not required. Therefore, in a wireless communication system, a method of driving a wireless device with a battery is adopted. In addition, there is also a method for generating power by using energy existing in the surrounding environment, and storing the obtained power in a battery as a power source of a wireless device. In addition, power generation using energy existing in the surrounding environment in this manner is called environmental power generation.

In a wireless device using such a power supply, in order to achieve continuous operation for a long period of time with a limited amount of power, it is required to reduce the amount of power consumption in operation as much as possible. As a method of reducing the power consumption during operation, there is a method of performing intermittent operation. The intermittent operation is an operation in which the circuit operates only during communication with other devices. In other periods, the state of the circuit is set to a sleep state in which the power consumption is reduced to stop the operation of the circuit.

Patent Document 1 discloses a technique for reducing the power consumption by changing the intermittent operation period and the preamble length in accordance with the remaining power of each wireless device, and increasing the intermittent operation period when the remaining power is reduced.

[Prior technical literature]

[Patent Literature]

Patent Document 1: Japanese Patent Application Laid-Open No. 2005-217548

In Patent Document 1, each wireless device individually changes the intermittent operation cycle. Therefore, the wireless device on the transmitting side must change the preceding length according to the intermittent operation period of the wireless device on the receiving side. Specifically, a wireless device that intends to transmit data to a wireless device that has an increased intermittent operation period will transmit the preceding text with a length corresponding to the intermittent operation period. Therefore, there is a problem that the transmission time increases and the power consumption amount increases.

Especially in the case where the remaining power of wireless devices within a certain range is reduced together, the intermittent operating cycle of the wireless device that is the transmission destination of a plurality of wireless devices will increase, thereby causing the wireless devices to transmit data. The transmission wait time increases. In addition, since the power consumption of each wireless device will increase, it is necessary to further increase the intermittent operation period of the wireless device. Because the wireless machine repeatedly performs such an action, the intermittent operation cycle of all the wireless machines constituting the multi-hop wireless communication network gradually increases. As a result, the wireless communication system as a whole can only operate with a large intermittent operation cycle, and the data transfer delay will constantly increase.

In addition, since each wireless device individually changes the intermittent operation period, a time shift occurs in the communication frequency of each wireless device, and there is also a problem that the data transfer delay fluctuates.

In the present invention, the purpose is to calculate the intermittent operation cycle corresponding to the remaining power storage amount for each wireless device, and to select a common period that is common to all wireless devices, thereby preventing power exhaustion in each wireless device and preventing Delay in data transfer due to time shifts in communication frequency.

The wireless communication system of the present invention includes a mother wireless machine and a plurality of child wireless machines, and the mother wireless machine and the plurality of child wireless machines perform wireless communication; each of the child wireless machines of the plurality of child wireless machines includes: a power generation unit, Power generation; and a power storage unit that stores power generated by the power generation unit; the parent wireless unit includes: a period calculation unit that calculates each sub wireless unit for each of the plurality of sub wireless units. The amount of power that the machine can use at the first time is the amount of available power, and the intermittent operation cycle is calculated as the calculation cycle. The common calculation period of each wireless device is regarded as a common period. The intermittent operation period is a period of intermittent operation of sleep after each wireless device operates, and each wireless device performs the aforementioned intermittent operation for the first time. The power consumption at that time does not exceed the aforementioned available power; and the period adjustment section, which is based on the previous Calculating period is selected as the remaining amount of the storage sub-cycles of common radio, to determine whether to be the common period for the respective plurality of sub-sub-radio radio.

In the wireless communication system of the present invention, the cycle calculation unit calculates an intermittent operation cycle in which each sub-wireless device performs an intermittent operation for a first time in which the power consumption does not exceed the usable power amount as a calculation cycle. In addition, the period calculation unit selects a common period to be applied to each of the plurality of child radios from the plurality of calculation periods calculated for the plurality of child radios. In addition, the period adjustment unit determines whether or not to apply the common period to each of the sub-radio devices of the plurality of sub-radio devices based on the remaining storage capacity of the sub-radio devices selected as the common period based on the calculated period. In this way, according to the wireless communication system of the present invention, the intermittent operation period can be dynamically calculated from the power storage residual amount of each sub-wireless device, and a common period applicable to all the sub-wireless devices can be selected therefrom. Therefore, according to the wireless communication system of the present invention, it is possible to prevent the power from being depleted in each of the wireless devices, and at the same time to prevent the data transfer delay caused by the time shift of the communication frequency.

1.1a‧‧‧Sub wireless machine

2, 2a, 2b‧‧‧ mother wireless machine

11‧‧‧ Intermittent action control section

12‧‧‧Generation Department

13‧‧‧Power Storage Department

14, 14a‧‧‧Power Monitoring Department

15, 15a, 15b‧‧‧Wireless Communication Department

16, 24‧‧‧Memory Department

21, 21a, 21b‧‧‧Wireless Communication Department

22, 22a ~ 22j‧‧‧ Cycle calculation unit

23, 23a ~ 23c‧‧‧cycle adjustment department

31‧‧‧ Intermittent action indication

32‧‧‧Intermittent action cycle information

33‧‧‧ Power generation

34‧‧‧ Electricity storage

35‧‧‧Power monitoring results

41‧‧‧Notify Electricity Information

42‧‧‧period adjustment information

43‧‧‧ period calculation result

44‧‧‧ Electricity Forecast Results

45‧‧‧Connection status information

51, 61‧‧‧ processors

52, 62‧‧‧Memory

53, 63‧‧‧ Time Counter

54‧‧‧Power generation device

55‧‧‧ Power Storage Device

56‧‧‧Power monitoring circuit

57、64‧‧‧Wireless communication interface

500‧‧‧Wireless communication system

FIG. 1 is a configuration diagram of a wireless communication system 500 according to the first embodiment.

Fig. 2 is a configuration diagram of a wireless device 1 according to the first embodiment.

FIG. 3 is a configuration diagram of the parent wireless device 2 according to the first embodiment.

Fig. 4 is a flowchart of an intermittent operation process performed by the wireless device 1 according to the first embodiment.

Fig. 5 is a flowchart of a cycle control process performed by the master wireless device 2 according to the first embodiment.

Fig. 6 is a detailed flowchart of a period calculation process of the master wireless device 2 according to the first embodiment.

FIG. 7 is a flowchart of a cycle control process performed by the master wireless device 2 according to the second embodiment.

FIG. 8 is a flowchart showing the details of the power consumption calculation processing by the cycle calculation unit 22a in the master wireless device 2 according to the third embodiment.

Fig. 9 is a flowchart showing the details of the power consumption amount calculation process by the period calculation unit 22b in the master wireless device 2 of the fourth embodiment.

Fig. 10 is a detailed flowchart of the intermittent operation cycle calculation process performed by the cycle calculation unit 22c in the master wireless device 2 of the fifth embodiment.

FIG. 11 is a detailed flowchart of the intermittent operation cycle calculation process by the cycle calculation unit 22d in the master wireless device 2 according to the sixth embodiment.

Fig. 12 is a detailed flowchart of the intermittent operation cycle calculation process by the cycle calculation unit 22e in the master wireless device 2 of the seventh embodiment.

FIG. 13 is a detailed flowchart of the intermittent operation cycle calculation process by the cycle calculation unit 22f in the master wireless device 2 according to the eighth embodiment.

Fig. 14 is a flowchart showing an intermittent operation process performed by the wireless device 1 according to the ninth embodiment.

Fig. 15 is a flowchart showing the operation in the wireless communication unit 15a of the wireless device 1 of the child of the tenth embodiment.

FIG. 16 is a detailed flowchart of the processing performed by the wireless communication unit 21a and the period calculation unit 22f in the master wireless device 2 according to the eleventh embodiment.

Fig. 17 is a diagram showing an example of a functional configuration of a master wireless device 2a according to the twelfth embodiment.

Fig. 18 is a flowchart showing a cycle control process of the twelfth embodiment.

Fig. 19 is a flowchart showing a cycle control process according to the thirteenth embodiment.

Fig. 20 is a diagram showing an example of a functional configuration of a wireless device 1a as a child of the fourteenth embodiment.

Fig. 21 is a diagram showing an example of a functional configuration of a master wireless device 2b according to the fourteenth embodiment.

Fig. 22 is a detailed flowchart of the processing by the wireless communication unit 21b and the period calculation process by the period calculation unit 22j according to the fourteenth embodiment.

Hereinafter, embodiments of the present invention will be described using drawings. In the drawings, the same or equivalent parts are assigned the same reference numerals. In the description of the embodiment, the same or equivalent parts are appropriately omitted or simplified.

Embodiment 1

*** Explanation of composition ***

The configuration of the wireless communication system 500 according to this embodiment will be described using FIG. 1.

The wireless communication system 500 includes a mother wireless device 2 and a plurality of child wireless devices 1. The master wireless machine 2 and the plurality of slave wireless machines 1 perform multi-point hopping wireless communication.

The wireless communication system 500 is configured by a plurality of wireless devices including a child wireless device 1 and a parent wireless device 2. Among the plurality of wireless devices, there are two types of wireless devices, a child wireless device 1 and a parent wireless device 2.

The slave radio 1 operates as a slave connected to a terminal of the multi-hop wireless communication network or as a repeater connected to the middle of the multi-hop wireless communication network to perform relay forwarding. The slave radio 1 is also referred to as a slave that also serves as a repeater. In FIG. 1, each of the repeater 1-1 to the repeater 1-5 and the slaves 1-6 to 1-11 is the slave wireless device 1. The master wireless machine 2 communicates with a repeater or a slave.

In the wireless communication system 500, each of a plurality of wireless devices transmits data such as sensor data as a data packet. In addition, each of the plurality of wireless devices transmits control information as a control packet. Here, the sub-wireless machine 1 operating as a repeater not only relays data, but also data generated by a device such as a sensor connected to the sub-wireless machine 1, or generated by the sub-wireless machine 1. Control information is transmitted. In this multi-hop wireless communication network, each wireless device periodically transmits control packets to each other to monitor the status of the network. Furthermore, when there is no response from the child wireless machine 1 within a certain period of time, the parent wireless machine 2 determines that the child wireless machine 1 has disconnected from the network, and transmits a control packet for rebuilding the network to change the wireless machine. Connection path.

The configuration of the child wireless device 1 according to this embodiment will be described using FIG. 2.

The wireless device 1 includes a processor 51, a memory 52, a counter 53, a power generating device 54, a power storage device 55, a power monitoring circuit 56, and a wireless communication interface. ) 57 and other hardware computers.

In addition, the slave wireless device 1 includes the intermittent operation control section 11, the power generation section 12, the power storage section 13, the power source monitoring section 14, the wireless communication section 15, and the memory section 16 as constituent elements.

The intermittent operation control unit 11 wakes up in accordance with a wake-up time set before moving to the sleep state. The intermittent operation control unit 11 outputs an intermittent operation instruction 31 for instructing wake-up to the power source monitoring unit 14 and the wireless communication unit 15. In addition, the intermittent operation control unit 11 controls an intermittent operation pattern to be shifted to the sleep state after the intermittent operation instruction 31 is output. In addition, the intermittent operation instruction 31 is based on the value of the intermittent operation cycle stored in the control packet received from the master wireless device 2 or the intermittent operation cycle information 32 which specifies the next wake-up time, and sets the next wake-up time. After setting in itself, it is used to instruct other components to move to the dormant state.

The power generation unit 12 generates power by converting energy such as light, vibration, or heat into electricity, and outputs the generated power 33.

The power storage unit 13 stores the generated power 33 generated by the power generation unit 12. In addition, the power storage unit 13 supplies power storage power 34 as a power source for operation of each unit of the slave wireless device 1.

The power source monitoring unit 14 wakes up in accordance with the intermittent operation instruction 31 for instructing to wake up, and monitors the power generation state in the power generation unit 12 and the power storage amount in the power storage unit 13. The so-called power generation state refers to the power generation amount and time. The power source monitoring unit 14 monitors the generated power 33 and the stored power 34, outputs the monitoring result as the power source monitoring result 35, and moves to the sleep state in accordance with the intermittent operation instruction 31 for moving to the sleep state.

The wireless communication unit 15 wakes up in accordance with the intermittent operation instruction 31 for instructing to wake up, and stores the power monitoring result 35 in a control packet or a data packet and transmits it to the parent wireless device 2. In addition, the wireless communication unit 15 extracts the value of the intermittent operation period stored in the control packet received from the master wireless device 2 or information indicating the next wake-up time, and outputs it as the intermittent operation period information 32. The wireless communication unit 15 moves to the sleep state in accordance with the intermittent operation instruction 31 for moving to the sleep state.

Next, the hardware of the slave wireless device 1 will be described.

The function of the intermittent operation control unit 11 is realized by the processor 51 reading a program stored in the memory 52 and executing it. The processor 51 uses the timer counter 53 to identify the wake-up time.

The processor 51 is connected to other hardware through signal lines. The processor 51 is an integrated circuit (Integrated Circuit) that performs arithmetic processing and is used to control other hardware. Specifically, the processor 51 is a CPU, a DSP, or a GPU. CPU is the abbreviation of Central Processing Unit, the DSP is the abbreviation of Digital Signal Processor, and the GPU is the abbreviation of Graphics Processing Unit.

The memory 52 is a volatile memory device. The memory 52 is also referred to as a main memory device or a main memory. Specifically, the memory 52 is a RAM (Random Access Memory). The memory section 16 is provided in the memory 52.

The function of the power generation section 12 is realized by the power generation device 54. The power generation device 54 is a device that performs various types of environmental power generation such as photovoltaic power generation, vibration power generation, and thermoelectric power generation.

The function of the power storage unit 13 is realized by the power storage device 55. The power storage device 55 includes devices such as a secondary battery, an electrical double layer capacitor (condenser), and a lithium ion capacitor.

The functions of the power source monitoring unit 14 are realized by monitoring the generated power 33 and the stored power 34 performed by the power supply monitoring circuit 56 and the execution of programs executed by the processor 51. That is, the power generation monitoring circuit 56 monitors the generated power 33 and the stored power 34, and the processor 51 reads the program stored in the memory 52 and executes the program using the monitoring result to generate the power monitoring result 35. Here, the power source monitoring circuit 56 grasps the state of power generation by detecting the value of the voltage or the value of the voltage and the current, and grasps the state of power storage by detecting the value of the voltage.

The function of the wireless communication unit 15 is realized by the wireless communication interface 57. The wireless communication unit 15 obtains the power supply monitoring result 35 from the processor 51 through the wireless communication interface 57, and uses the power supply monitoring result 35 to generate and transmit a control packet or a data packet. In addition, the wireless communication unit 15 extracts the intermittent operation cycle information 32 from the received control packet through the wireless communication interface 57 and outputs it to the processor 51. In addition, the wireless communication unit 15 stores the information of the wireless device connected through the wireless communication interface 57 in the memory 52.

The configuration of the master wireless device 2 according to this embodiment will be described using FIG. 3.

The master wireless machine 2 is a computer including hardware such as a processor 61, a memory 62, a time counter 63, and a wireless communication interface 64.

The master wireless device 2 includes a wireless communication unit 21, a period calculation unit 22, a period adjustment unit 23, and a memory unit 24 as constituent elements.

The wireless communication unit 21 extracts a power monitoring result 35 stored in a control packet or a data packet received from the slave wireless device 1 as a notification of power information 41. In addition, the wireless communication unit 21 stores the value of the intermittent operation cycle or the cycle adjustment information 42 specifying the next wake-up time in a control packet and transmits it to the slave wireless device 1. This cycle adjustment information 42 is extracted from the control packet by the wireless communication unit 15 of the slave radio 1 and is output as the intermittent operation cycle information 32.

The cycle calculation unit 22 predicts the future power generation amount for each of the wireless sub-devices 1 according to the power generation method based on the notified power information 41 indicating the power generation and storage status notified from the wireless sub-device 1. The period calculation unit 22 estimates the amount of power consumed when the operation of the slave wireless device 1 is continued for only a predetermined time. Hereinafter, the predetermined time is referred to as a first time. The cycle calculation unit 22 calculates an intermittent operation cycle of the amount of power consumed by the wireless device 1 during the operation of the first amount of time, which does not exceed the amount of available power in the total of the remaining power storage amount and the predicted generation amount. Here, the usable power amount is a value obtained by subtracting the minimum amount of power required to continue a preset operation from the total of the remaining power storage amount and the predicted power generation amount. At this time, the power consumption amount of the slave wireless device 1 is obtained from, for example, the power consumption of the slave wireless device 1 in each operation state and the duration of each operation state. In addition, the first time when the power consumption amount is estimated is set to estimate the time to restore the predetermined power storage amount based on the predicted power generation amount. In addition, the information on the power generation capacity of each power generation method used in predicting the power generation amount is set in advance. Alternatively, the value set from the outside is held in advance as information on the power generation capability. For the information about this power generation capability, it is the value determined by using the relationship between environmental conditions and power generation efficiency, etc., depending on the power generation method, or each power generation device used. The intermittent operation cycle calculated in this way is an intermittent operation cycle in which operation can be prevented from being stopped due to power exhaustion during the first time period.

The memory unit 24 is a threshold value for storing the power storage residual amount, and also the first threshold value and the second threshold value. The first threshold is used when it is determined that the intermittent operation cycle needs to be adjusted. The period adjustment unit 23 determines that the intermittent operation period is to be adjusted when the remaining power storage amount indicated by the notification power information 41 notified from the slave wireless device 1 is lower than the first threshold. The second threshold value is used when it is determined that it is not necessary to adjust the intermittent operation cycle. The period adjustment unit 23 determines that the adjustment of the intermittent operation period is to be canceled when the remaining power storage amount indicated by the notification power information 41 notified from the wireless device 1 is higher than the second threshold. Here, the values of the first threshold value and the second threshold value are determined such that the second threshold value becomes larger than the first threshold value. In this way, by increasing hysteresis in the determination values of the adjustment execution and cancellation, the frequency of the adjustment intermittent operation cycle is prevented from increasing. In addition, the first threshold value is a value obtained by adding the minimum amount of electric power required for the operation to continue and the amount of electric power that can perform the operation for a certain period of time. The second threshold value is a value obtained by adding an amount of electric power capable of operating for a certain period to the first threshold value.

When it is determined that the intermittent operation period needs to be adjusted, the cycle adjustment unit 23 outputs the information selected as the intermittent operation period or specifying the next wake-up time obtained from the intermittent operation period as the cycle adjustment information 42. On the other hand, when it is determined that it is not necessary to adjust the intermittent operation cycle, the cycle adjustment unit 23 sets the value of the intermittent operation cycle that has been set as the operating condition of the default value or designates to obtain it from the intermittent operation cycle The information of the next wake-up time is output as the cycle adjustment information 42.

Next, the hardware of the master wireless device 2 will be described.

Specific examples of the processor 61 and the memory 62 are the same as those of the slave wireless device 1.

The function of the cycle calculation unit 22 is realized by reading and executing a program stored in the memory 62 by the processor 61.

The function of the cycle adjustment unit 23 is realized by the processor 61 reading and executing a program stored in the memory 62. The processor 51 uses the timer counter 63 to identify the next wake-up time of the wireless device 1.

The function of the wireless communication unit 21 is realized by the wireless communication interface 64. The processor 61 inputs the cycle adjustment information 42 to the wireless communication interface 64. In addition, the wireless communication interface 64 generates and transmits a control packet that stores the input period adjustment information 42. In addition, the control packet or data packet received from the wireless communication interface 64 extracts the power monitoring result 35 and outputs it as the notification power information 41. The wireless communication interface 64 is used for generating, transmitting and receiving control packets and data packets. In addition, the wireless communication unit 21 stores the information of the wireless device connected to the wireless communication interface 64 and the information of the network topology in the memory 62.

In addition, each wireless device of the child wireless device 1 and the parent wireless device 2 includes an auxiliary memory device. The auxiliary memory device is a non-volatile memory device. Specifically, the auxiliary memory device is a ROM, an EEPROM, an HDD, or a flash memory. ROM is short for Read Only Memory, EEPROM is short for Electrically Erasable Programmable Read-Only Memory, and HDD is Hard Disk Drive Short name.

The auxiliary memory device stores a program for realizing the functions of the constituent elements of each wireless device of the child wireless device 1 and the parent wireless device 2. The program that realizes the functions of the constituent elements is loaded into the memory and executed by the processor.

Furthermore, there may be a case where an OS (Operating System) is stored in the auxiliary memory device. At this time, at least a part of the OS is loaded into the memory and executed by the processor.

In other words, the processor is a program that implements the functions of the constituent elements of each wireless machine while executing the OS.

The "parts" of the constituent elements of each wireless device may be renamed "processing" or "steps". The functions of the constituent elements of each wireless device can be realized by firmware.

The program for realizing the functions of the constituent elements of each wireless device is a non-volatile storage medium such as a magnetic disk, an optical disk, or a flash memory.

In addition, the "processing" of each processing to be described below may be renamed as "program", "program product" or "computer-readable medium with recorded program".

*** Explanation of operation ***

The operation of the child wireless device 1 and the parent wireless device 2 in the wireless communication system 500 is equivalent to a wireless communication method. In addition, the procedure of the wireless communication method is equivalent to the procedure of wireless communication processing performed by the wireless communication program product. The radio communication processing includes an intermittent operation process performed by the slave radio 1 and a cycle control process performed by the master radio 2. The operation of the wireless communication system 500 will be described below using FIGS. 4 to 6.

<Intermittent action processing>

The intermittent operation processing performed by the child wireless device 1 according to this embodiment will be described with reference to FIG. 4.

The intermittent operation is an operation in which the slave radio 1 performs a sleep after the operation. In addition, the operation time during the intermittent operation is substantially constant for each of the wireless devices 1.

In step S1, the intermittent operation control unit 11 wakes up in accordance with the wake-up time set before going to the sleep state.

In step S2, the intermittent operation control unit 11 outputs an intermittent operation instruction 31 for instructing to wake up, and wakes up the power monitoring unit 14 and the wireless communication unit 15.

In step S3, the power source monitoring unit 14 monitors the generated power 33 and the stored power 34 to generate a power source monitoring result 35. The power source monitoring result 35 is notification power information including information on the amount of power generated by the power generation section 12.

In step S4, the power source monitoring unit 14 outputs the generated power source monitoring result 35 to the wireless communication unit 15.

In step S5, the wireless communication unit 15 stores the power monitoring result 35 in a data packet when there is data to be transmitted, and transmits the data packet to the parent wireless device 2. In addition, the wireless communication unit 15 generates a control packet storing a power monitoring result 35 when there is no data to be transmitted, and transmits the control packet to the parent wireless device 2.

In step S6, the wireless communication unit 15 extracts the intermittent operation cycle information 32 from the control packet received from the master wireless device 2. The wireless communication unit 15 outputs the extracted intermittent operation cycle information 32 to the intermittent operation control unit 11.

In step S7, the intermittent operation control unit 11 sets the next wake-up time in accordance with the intermittent operation cycle information 32.

In step S8, the intermittent operation control unit 11 outputs an intermittent operation instruction 31 for instructing to move to the sleep state.

In step S9, the intermittent operation control unit 11 moves to the sleep state.

In addition, the power generation unit 12 and the power storage unit 13 also operate during the sleep state of the sub-wireless device 1, and the power generation and power storage processes are always performed. However, depending on the situation, the power generated by the power generation unit 12 may become zero.

<Cycle control processing>

The cycle control process performed by the master wireless device 2 according to this embodiment will be described with reference to FIG. 5.

The period control process includes a period calculation process performed by the period calculation unit 22, a period adjustment process performed by the period adjustment unit 23, and a wireless communication process performed by the wireless communication unit 21.

In step S21, the wireless communication unit 21 extracts the notification power information 41 from the control packet or data packet received from the slave wireless device 1, and outputs the notification power information 41. The processing of this step S21 is continued until the packets from all the sub-wireless devices 1 have been received, or until a predetermined time set in advance has passed.

<< cycle calculation processing >>

In the period calculation process, the period calculation unit 22 calculates the amount of electric power that can be used by each of the sub-radio devices 1 at the first time as the usable electric power amount for each of the plurality of sub-radio devices 1. In addition, the cycle calculation unit 22 calculates an intermittent operation cycle, which is a cycle of an intermittent operation in which each child wireless device 1 performs a sleep after operating. The intermittent operation period is a period in which the power consumption of each of the sub-wireless devices 1 when the intermittent operation is performed for the first time does not exceed the usable power amount. The cycle calculation unit 22 calculates such an intermittent operation cycle as the calculation cycle, and selects from the plurality of calculation cycles calculated for the plurality of sub-radio devices a common calculation cycle to be applied to each of the plurality of sub-radio devices as a common cycle.

In addition, the cycle calculation unit 22 calculates, as the calculation cycle, a minimum intermittent operation cycle in which the power consumption amount when the intermittent operation is performed for the first time does not exceed the usable power amount. The cycle calculation unit 22 selects the maximum calculation cycle among the plurality of calculation cycles as the common cycle.

First, the cycle calculation unit 22 uses the average unit power generation amount per unit time generated by the power generation unit 12 to calculate the time to increase the residual power remaining in the power storage unit 13 to the first power storage amount as the first time. Specifically, it is as follows.

In step S22, the cycle calculation unit 22 calculates a predicted value of the unit power generation amount per unit time based on the power generation status displayed on the notification power information 41.

In step S23, the cycle calculation unit 22 calculates the amount of power consumed when the slave wireless device 1 is operated only for a predetermined first time.

In step S24, the cycle calculation unit 22 calculates an intermittent operation cycle based on the average unit power generation amount per unit time and the power consumption amount for the first time. The cycle calculation unit 22 calculates the intermittent operation cycle of the amount of electric power consumed by the operation in the first amount of time, which does not exceed the total amount of electric power remaining in the stored electricity amount and the predicted amount of power generation in the amount of power generated in the first time. As the calculation period. Here, the calculation period is calculated for each of the plurality of sub wireless devices 1 that have obtained the notified power information 41. In addition, the period calculation unit 22 selects a value that can be applied to all the slave wireless devices 1 among the plurality of calculated calculation periods as a common period. Specifically, the cycle calculation unit 22 selects a calculation cycle that has a maximum value from a plurality of calculation cycles as a common cycle.

In step S25, the period calculation unit 22 outputs a period calculation result 43. The period calculation result 43 includes: the common period selected in step S24; and a child wireless device selected as a calculation source of the calculation period of the common period. 1 information. In addition, the input notification power information 41 is temporarily held for each of the wireless devices 1 and is updated every time the input is made.

Here, the detailed processing content of the period calculation processing of the master wireless device 2 of this embodiment is demonstrated using FIG. 6. FIG. FIG. 6 corresponds to steps S22, S23, and S24.

In step S22, steps S101 to S104 are performed. The processing from step S101 to step S104 is also referred to as power generation amount prediction processing.

In step S101, the period calculation unit 22 determines whether there is a timeout. If it is not overtime, the cycle calculation unit 22 proceeds to step S102.

In step S102, the cycle calculation unit 22 obtains information on the amount of power generation from the notified power information 41.

In step S103, the cycle calculation unit 22 obtains information on the power generation capability memorized in advance.

In step S104, the cycle calculation unit 22 calculates an average unit power generation amount per unit time using information on the obtained power generation amount and power generation capacity. Here, the timeout indicates that the processing time that can be scheduled in step S22, step S23, and step S24 has passed.

In step S23, steps S105 to S107 are performed. The processing of steps S105 to S107 is also referred to as power consumption amount calculation processing.

In step S105, the cycle calculation unit 22 calculates a first time for estimating the recovery of a predetermined power storage amount by charging the power storage unit 13 in a unit power generation amount. Specifically, the cycle calculation unit 22 uses the unit power generation amount, and calculates the time to increase the remaining power storage amount stored in the power storage unit 13 to the first stored power amount as the first time. Alternatively, the first time may be the time until the amount of power generated by the power generation unit 12 reaches a predetermined amount. Alternatively, the first time may be the time until the ratio of the power storage residual amount to the power storage capacity performed by the power storage unit 13 reaches a predetermined ratio. Alternatively, the first time may be a fixed value determined in advance for each of the wireless devices 1 regardless of the amount of power generation and the amount of stored power.

In step S106, the cycle calculation unit 22 obtains information on the amount of power consumed by the wireless device 1 in each operation state and the duration of each operation state.

In step S107, the period calculation unit 22 calculates the power consumption amount to be consumed at the first time when the recovery of the predetermined stored power is estimated based on the information.

In step S24, steps S108 to S112 are performed. The processing of steps S108 to S112 is also referred to as an intermittent operation cycle calculation processing.

In step S108, the cycle calculation unit 22 obtains information on the remaining power storage amount from the notified power information 41.

In step S109, the cycle calculation unit 22 calculates the predicted power generation amount generated at the first time using the unit power generation amount. The period calculation unit 22 is a value obtained by subtracting the minimum amount of power to be consumed by each wireless device at the first time from the sum of the predicted power generation amount and the remaining power storage amount as the usable power amount. The minimum amount of power that each wireless device needs to consume in the first time is the amount of power that the wireless device 1 needs to continue operating for the first time.

In step S110, the cycle calculation unit 22 calculates the amount of power consumption to be consumed in the first time, and the minimum intermittent operation cycle that does not exceed the amount of available power is used as the calculation cycle.

In step S111, the cycle calculation unit 22 determines whether the calculation of the intermittent operation cycle has been completed for all the slave wireless devices 1 or whether it has expired. If it is not any, the cycle calculation unit 22 returns to step S101 and waits for the next input of the notification power information 41. For example, if it is impossible to receive the notification power information 41 from the child wireless device 1 for some reason, it becomes timeout in step S101. On the other hand, in step S111, the calculation for all the wireless radios 1 has been completed, or the timeout has expired, or the timeout has passed in step S101, and the cycle calculation unit 22 proceeds to step S112.

In step S112, the cycle calculation unit 22 selects the largest value among the calculation cycles with respect to the plurality of slave radios 1 calculated as the common cycle. In addition, the period calculation unit 22 outputs a period calculation result 43 which includes information on a common period and which sub-radio device 1 the common period corresponds to.

<< Periodic adjustment processing >>

Returning to FIG. 5, the explanation is continued.

In the period adjustment process, the period adjustment unit 23 determines whether or not to apply the common period to each sub-radio of the plurality of sub-radio based on the remaining power storage amount of the sub-radio that is selected as the common period of the calculation period. The period adjustment unit 23 determines that the common period should be applied to each of the plurality of sub-radio units when the power storage residual amount is less than the first threshold. The period adjustment unit 23 determines that the common period should not be applied to each of the plurality of sub-radio units when the power storage residual amount is greater than the second threshold. The cycle adjustment unit 23 determines a common cycle to maintain the status quo when the power storage residual amount is equal to or more than the first threshold and equal to or less than the second threshold.

The following processing performed by the period adjustment unit 23 is performed on the slave wireless device 1 whose common period belonging to the maximum value has been calculated. Here, the slave wireless device 1 whose common period has been calculated is set as a processing target wireless device.

In step S26, the cycle adjustment unit 23 compares the remaining power storage amount displayed in the notification power information 41 of the wireless device to be processed and the first threshold value. When the remaining power storage amount is less than the first threshold value, the cycle adjustment unit 23 proceeds to step S27. When the remaining power storage amount is equal to or greater than the first threshold, the cycle adjustment unit 23 proceeds to step S28.

In step S27, the cycle adjustment unit 23 determines that the adjustment of the intermittent operation cycle is performed, and proceeds to step S30.

In step S28, the cycle adjustment unit 23 compares the remaining power storage amount displayed in the notification power information 41 of the target radio and the second threshold value. When the remaining power storage amount is greater than the second threshold value, the cycle adjustment unit 23 proceeds to step S29. When the remaining power storage amount is equal to or less than the second threshold value, the cycle adjustment unit 23 proceeds to step S30. That is, the cycle adjustment unit 23 determines that the status of the intermittent operation cycle is maintained.

In step S29, the cycle adjustment unit 23 determines that the adjustment of the intermittent operation cycle is canceled, and proceeds to step S30.

In step S30, the period adjustment unit 23 determines whether the communication to be processed by the master wireless device 2 has been completed. As soon as the communication to be processed by the master wireless device 2 is completed, the period adjustment section 23 outputs the period adjustment information 42 (step S31). When the communication to be processed by the parent wireless device 2 is not completed, it waits until the communication to be processed by the parent wireless device 2 is completed. In addition, the input notification power information 41 is temporarily held for each of the wireless devices 1, and is updated every time the input is made.

<< Wireless Communication Processing >>

When the wireless communication unit 21 determines that the common cycle is to be applied to each of the plurality of sub-wireless radios by the cycle adjustment unit 23, it transmits cycle adjustment information 42 including information for performing intermittent operations using the common cycle to Each sub-radio of the plurality of sub-radio.

In step S32, the wireless communication unit 21 generates a control packet storing the period adjustment information 42 and transmits the control packet to the slave wireless device 1.

*** Other constructions **

<Modification 1>

Each device of the slave wireless device 1 and the parent wireless device 2 may also have an input interface and an output interface.

The input interface is a port connected to input devices such as a mouse, a keyboard, and a touch panel. Specifically, the input interface is a USB (Universal Serial Bus, universal serial bus) terminal. The input interface may be a port connected to a LAN (Local Area Network).

In addition, the output interface is a port to which a cable of a display device such as a display is connected. Specifically, the output interface is a USB terminal or an HDMI (registered trademark) (High Definition Multimedia Interface) terminal. Specifically, the display is an LCD (Liquid Crystal Display).

<Modification 2>

In this embodiment, although the functions of a part of the components of each device of the child wireless device 1 and the parent wireless device 2 are realized by software, as a modification, the components of each device may be realized by hardware. Functions.

Each device of the slave wireless device 1 and the parent wireless device 2 can realize the function of the constituent elements using an electronic circuit.

The electronic circuit is a dedicated electronic circuit that realizes the functions of the constituent elements of each device. Specifically, the electronic circuit is a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, a logic IC, GA, ASIC, or FPGA. GA is short for Gate Array. ASIC is an abbreviation for Application Specific Integrated Circuits. FPGA is short for Field-Programmable Gate Array.

The functions of the constituent elements of each device can be realized by one electronic circuit, or can be realized by being dispersed into a plurality of electronic circuits.

Each of a processor and an electronic circuit is also referred to as processing circuitry. In other words, the functions of the constituent elements of each device are realized by a processing circuit system.

** Explanation of the effect of Embodiment 1 **

The wireless communication system of this embodiment is constituted by a wireless device that periodically performs intermittent operations such as setting the state inside the device to a power-saving state with a small amount of power consumption. According to the wireless communication system of this embodiment, the power consumption of the transmitting wireless device is not increased, and the intermittent operation period can be adjusted according to the remaining power storage capacity of the transmitting wireless device. Therefore, according to the wireless communication system of this embodiment, the power consumption of the wireless device can be reduced, the system operation can be stopped due to power exhaustion, and the communication frequency can be shifted without time according to each wireless device. Keep moving.

In the child wireless device and the parent wireless device of the present embodiment, the power generation monitoring section of the child wireless device monitors the power generation and power storage status of the child wireless device, and the wireless communication section transmits the result to the parent wireless device 2. In addition, the cycle calculation unit of the master wireless device calculates a common cycle applicable to all the repeaters and slave devices as a common intermittent operation cycle. In addition, the period adjustment unit determines whether to adjust the intermittent operation cycle based on the remaining power storage amount notified from the slave wireless device 1, and the wireless communication unit transmits the result to the slave wireless device 1. Then, the intermittent operation control unit of the slave wireless device changes the intermittent operation cycle in accordance with the notified intermittent operation cycle information. Therefore, according to the wireless communication system of this embodiment, it is possible to prevent the remaining power storage amount of all the wireless devices from being lowered than a certain value. In addition, according to the wireless communication system of this embodiment, it is possible to prevent any sub-wireless device from stopping operation and interrupting communication due to power exhaustion, and continuously perform the overall operation of the wireless communication system. Furthermore, according to the wireless communication system of this embodiment, since all the wireless devices operate at a common intermittent operation cycle, it is possible to prevent power consumption caused by an increase in transmission waiting time caused by different intermittent operation cycles. Increase. In addition, according to the wireless communication system of this embodiment, the intermittent operation cycle is increased by the increase of the power consumption, thereby avoiding a state such as continuous operation with a larger intermittent operation cycle, that is, communication information The forwarding delay will be constantly increasing.

Embodiment 2

In this embodiment, points different from the first embodiment will be described. In this embodiment, the same components as those in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

In the first embodiment, the period adjusting unit 23 of the master wireless device 2 uses a common first threshold value and a second threshold value for all the slave wireless devices 1 as a threshold value for determining that it is necessary to adjust the power storage residual amount of the intermittent operation cycle. However, in this embodiment, a separate threshold is defined for each of the repeater and the slave, and the threshold for the repeater is set to a larger value than the threshold for the slave. The period adjustment unit 23a of the present embodiment recognizes whether the slave radio 1 operates as a repeater or a slave, and determines whether to adjust the intermittent operation period.

FIG. 7 is a flowchart showing a cycle control process performed by the master wireless device 2 according to this embodiment. Fig. 7 corresponds to Fig. 5 of the first embodiment. Those having the same reference numerals as those in the description of the first embodiment operate in the same manner.

In FIG. 7, the cycle adjustment unit 23 a performs the following operations in addition to the operations shown in the description of the first embodiment.

In step S33, the period adjustment unit 23a recognizes the wireless device to be processed as a repeater based on the information of the specified wireless sub-device 1 included in the period calculation result 43 received from the period calculation unit 22. Still acting as a slave. If it is a slave, the cycle adjustment unit 23a proceeds to step S26, and performs the same processing as that of the first embodiment. On the other hand, when acting as a relay, the period adjustment unit 23a proceeds to step S34.

In step S34, the period adjustment unit 23a compares the remaining power storage amount displayed in the notification power information 41 of the wireless device to be processed and the third threshold value. When the remaining power storage amount is smaller than the third threshold value, the cycle adjustment unit 23a proceeds to step S35. When the remaining power storage amount is equal to or greater than the third threshold, the cycle adjustment unit 23a proceeds to step S36.

In step S35, the cycle adjustment unit 23a determines that the adjustment of the intermittent operation cycle is performed, and proceeds to step S30.

In step S36, the period adjustment unit 23a compares the remaining power storage amount displayed in the notification power information 41 of the wireless device to be processed and the fourth threshold value. When the power storage residual amount is larger than the fourth threshold value, the cycle adjustment unit 23a proceeds to step S37. When the remaining power storage amount is equal to or less than the fourth threshold, the cycle adjustment unit 23a proceeds to step S30. That is, the cycle adjustment unit 23a determines that the status of the intermittent operation cycle is maintained.

In step S37, the cycle adjustment unit 23a determines that the adjustment of the intermittent operation cycle is canceled, and proceeds to step S30.

Here, the first threshold value and the second threshold value are values with respect to the slave device, and the third threshold value and the fourth threshold value are values with respect to the relay device. The third threshold value and the fourth threshold value are set in advance to be larger than the first threshold value and the second threshold value, respectively.

** Explanation of the effect of Embodiment 2 **

In the master wireless device of this embodiment, a separate threshold is set for each of the repeater and the slave. Specifically, in the master wireless device of this embodiment, the threshold value with respect to the repeater is set to a larger value than the threshold value with respect to the slave device. The period adjustment unit 23a recognizes whether the slave radio 1 operates as either a repeater or a slave, and determines whether to adjust the intermittent operation period. Therefore, according to the wireless communication system of this embodiment, a repeater having a higher necessity for the operation of the wireless communication system to continue operating becomes more likely to continue the operation, and the reliability of the continuous operation of the entire system can be improved. In addition, according to the wireless communication system of this embodiment, since the slaves connected to the terminals of the communication network do not affect the entire communication network, the operation of the slaves can be allowed to stop when the residual power is reduced in some of the slaves. Thereby, according to the wireless communication system of this embodiment, it is possible to avoid adjusting the intermittent operation cycle to be longer than necessary by cooperating with the slave.

Embodiment 3

In this embodiment, points different from the first embodiment will be described. In this embodiment, the same components as those in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

In the first embodiment, the cycle calculation unit 22 calculates the recovery time of a certain amount of stored power estimated based on the unit power generation amount as the first time. In this embodiment, a value that is estimated to be a certain amount of power to be stored is set in advance for a power generation amount that is specified according to the power generation capacity of each power generation method, and the value is set as the first time. Instructions.

The storage unit 24 stores information on the amount of power generated by the power generation unit 12 for each of the plurality of sub wireless devices 1. Specifically, the information of the power generation amount is information of the power generation amount specified by the power generation capacity of each power generation method. The cycle calculation unit 22a calculates the first time based on the information of the power generation amount stored in the memory unit 24.

Fig. 8 is a diagram showing the details of the power consumption amount calculation process by the period calculation unit 22a in the master wireless device 2 according to this embodiment. Fig. 8 corresponds to the power consumption calculation processing of Fig. 6 described in the first embodiment. Those having the same reference numerals as those in the description of the first embodiment operate in the same manner.

In FIG. 8, step S113 is performed instead of step S105 in FIG. 6 described in the first embodiment.

In step S113, the cycle calculation unit 22a obtains the power generation capability information of the power generation capability information belonging to each power generation method. This power generation capability information is stored in the memory 62 in advance. The cycle calculation unit 22 a calculates a first time for estimating the restoration of a predetermined stored power amount based on the charging of the power storage unit 13 using the power generation amount obtained from the power generation capability information. In the following, the cycle calculation unit 22a calculates the amount of power consumption to be consumed by the operation at the first time by the same process as that of the first embodiment.

** Explanation of the effect of Embodiment 3 **

In the master wireless device of this embodiment, a value estimated to be a predetermined amount of power to be stored is set in advance based on the power generation amount specified by the power generation capacity of each power generation method. In addition, this value is used as a predetermined operation time, that is, as a first time, the power consumption amount is calculated. Therefore, according to the master wireless device of this embodiment, it is possible to prevent erroneous intermittent operation cycle adjustment when the actual power generation status to be notified is unstable.

Embodiment 4

In this embodiment, points different from the third embodiment will be described. In this embodiment, the same components as those in Embodiments 1 to 3 are assigned the same reference numerals, and descriptions thereof are omitted.

In the third embodiment, the period calculation unit 22a of the master wireless device 2 calculates the first time estimated as a certain amount of power to be stored based on the power generation amount specified by the power generation capacity of each power generation method as the first time. time. In this embodiment, it is determined whether the first time is to be calculated from the power generation amount notified through the notified power information 41 based on the notified power storage residual amount, or is determined from a preset power generation capacity for each power generation method. A description will be given of an aspect in which the amount of power generation is calculated for the first time.

As described in the first embodiment, the power source monitoring unit 14 of the slave wireless machine 1 transmits the notification power information including the information of the power generation amount originating from the power generating unit 12 to the master wireless machine 2. In addition, as described in the third embodiment, the memory unit 24 of the master wireless device 2 stores information on the power generation amount specified by the power generation capability of each power generation method for each child wireless device of the plurality of child wireless devices.

The cycle calculation unit 22b calculates the unit power generation amount based on the information of the power generation amount included in the notified power information when the power storage residual amount is smaller than the fifth threshold, and calculates the first time based on the unit power generation amount. In addition, the period calculation unit 22b calculates the first time based on the information of the power generation amount stored in the storage unit 24 when the power storage residual amount is equal to or greater than the fifth threshold.

FIG. 9 is a diagram showing the details of the power consumption amount calculation process by the period calculation unit 22b in the master wireless device 2 according to this embodiment. Fig. 9 corresponds to the power consumption calculation processing of Fig. 8 described in the third embodiment. Those with the same reference numerals as those described in the third embodiment operate in the same manner.

In FIG. 9, step S113, step S105, and step S114 are performed instead of step S113 of FIG. 8 described in the third embodiment.

In step S114, the cycle calculation unit 22b compares the remaining power storage amount displayed in the notification power information 41 with the fifth threshold value. When the remaining power storage amount is smaller than the fifth threshold value, the period calculation unit 22b calculates a first time for estimating the restoration of the predetermined stored power amount based on the predicted power generation amount for charging the power storage unit 13 (step S105). On the other hand, when the power storage residual amount is equal to or greater than the fifth threshold value, the power generation amount obtained from the information of the power generation capacity memorized is used to calculate the number of the estimated recovery of the predetermined power storage amount based on the charging of the power storage unit 13. 1 time (step S113). In the following, the amount of power to be consumed for the operation at the first time is calculated by the same processing as in the first embodiment. Here, the fifth threshold value is a value that has a sufficient margin compared to the remaining power storage amount notified by the notification of the power information 41 at half the time when the battery is fully charged.

** Explanation of the effect of Embodiment 4 **

In the mother wireless device of this embodiment, either the estimated time of recovery of a certain amount of stored power is estimated by predicting the amount of generated power, and the time of the amount of generated power defined by the power generation capacity of each power generation method is set in advance. As the first time. Therefore, according to the master wireless device of this embodiment, the power generation amount is predicted based on the actual power generation status only when the power storage state is worsened than a certain value, so it can be avoided when there is a mildly poor wireless power generation status. Adjust the intermittent action cycle to be longer than necessary.

Embodiment 5

In this embodiment, points different from the first embodiment will be described. In this embodiment, the same components as those in Embodiments 1 to 4 are assigned the same reference numerals, and descriptions thereof are omitted.

In the first embodiment, the period calculation unit 22 of the master wireless device 2 selects the largest value from the plurality of calculation periods calculated as the common period in the intermittent operation period calculation process. In the present embodiment, a description will be given of a case where the number of the child wireless devices 1 exceeding the calculation period is selected from a plurality of calculation periods to be a certain number or less.

FIG. 10 is a diagram showing details of the intermittent operation cycle calculation process performed by the cycle calculation unit 22c in the master wireless device 2 according to this embodiment. Fig. 10 corresponds to the intermittent operation cycle calculation process of Fig. 6 described in the first embodiment. Those having the same reference numerals as those in the description of the first embodiment operate in the same manner.

The processing from step S108 to step S111 is the same as that of FIG. 6.

In step S115, the period calculation unit 22c selects the child wireless machine 1 that operates as a repeater from the plurality of calculation cycles calculated in the plurality of child wireless machines 1, corresponding to a calculation cycle that is longer than the calculation cycle. The number of calculation periods is equal to or less than a certain number as a common period. The cycle calculation unit 22c outputs a cycle calculation result 43 including the selected common cycle and the information of the child wireless device 1 corresponding to the common cycle. Here, a certain number compared with the number of the sub-wireless devices 1 is the number of the sub-wireless devices 1 required to constitute a wireless communication network. The fixed number of the comparison wireless radios 1 is set in advance.

** Explanation of the effect of Embodiment 5 **

In the master wireless device of this embodiment, among the plurality of calculation periods, the number of the child wireless devices 1 exceeding the calculation period is selected to be a fixed number or less. Therefore, in the mother wireless device of this embodiment, a certain number of repeaters can be continuously operated, and even when there are a few wireless devices with poor power generation conditions, it is possible to avoid adjusting the intermittent operation cycle to be longer than Need degree.

Embodiment 6

In this embodiment, points different from the fifth embodiment will be described. In this embodiment, the same components as those in Embodiments 1 to 5 are assigned the same reference numerals, and descriptions thereof are omitted.

In the fifth embodiment, the period calculation unit 22c of the master wireless device 2 selects, from the plurality of calculation periods, the number of the child wireless devices 1 exceeding the calculation period to be a fixed number or less in the intermittent operation period calculation process. In this embodiment, the sub-wireless machine 1 is selected from a plurality of sub-wireless machines according to the network topology of the wireless communication system, and the largest calculation cycle among the calculation cycles of the selected sub-wireless machine 1 is selected as the common cycle. State description. The master wireless device 2 is a repeater specifically designated for maintaining a multi-hop wireless communication network based on the information of the network topology. Among the calculation periods with respect to a specially designated repeater, the maximum value is set to a common period. Here, the information of the network topology is, for example, a person who displays a connection path between the parent wireless device 2 and the child wireless devices 1-1 to 1-11 shown in FIG. 1.

FIG. 11 is a diagram showing the details of the intermittent operation cycle calculation process between the cycle calculation unit 22d in the master wireless device 2 in this embodiment. Fig. 11 corresponds to the intermittent operation cycle calculation process of Fig. 6 described in the first embodiment. Those having the same reference numerals as those in the description of the first embodiment operate in the same manner.

The processing from step S108 to step S111 is the same as that of FIG. 6.

In step S116, the period calculation unit 22d specifies the repeater required for maintaining the multi-hop wireless communication network based on the network topology information maintained during the network construction or reconstruction.

In step S117, the period calculation unit 22d selects the largest value from the calculation periods with respect to the specially designated repeater as the common period, and includes the selected common period and the child radio corresponding to the common period. A cycle calculation result 43 of the machine information is output.

** Explanation of the effect of Embodiment 6 **

In the mother wireless device of this embodiment, a repeater required for maintaining the multipoint hop wireless communication network is specifically designated based on the information of the network topology. Furthermore, in the master wireless device of this embodiment, since the maximum value is selected from the calculation periods with respect to the specially designated repeater, the adjustment amount of the intermittent operation period can be suppressed to a minimum.

Embodiment 7

In this embodiment, points different from the sixth embodiment will be described. In this embodiment, the same components as those in Embodiments 1 to 6 are assigned the same reference numerals, and descriptions thereof are omitted.

In Embodiment 6, the period calculation unit 22d of the master wireless device 2 specifically designates a repeater required for maintaining the multipoint hop wireless communication network based on the information of the network topology in the intermittent operation period calculation process, The maximum value is selected from the calculation cycles with respect to a specially designated repeater. In the present embodiment, a directly connected repeater is specifically designated for the master wireless device 2 based on the connection information held by the master wireless device 2, and is selected from a calculation cycle with respect to the specifically designated repeater. The maximum value will be described. That is, the period calculation unit 22e selects the child wireless device 1 connected to the parent wireless device 2 from the plurality of child wireless devices. The cycle calculation unit 22e selects the maximum calculation cycle among the calculation cycles of the selected child radio 1 as the common cycle.

Fig. 12 is a diagram showing the details of the intermittent operation cycle calculation process between the cycle calculation unit 22e in the master wireless device 2 in this embodiment. Fig. 12 corresponds to the intermittent operation period calculation process of Fig. 6 described in the first embodiment. Those having the same reference numerals as those in the description of the first embodiment operate in the same manner.

The processing from step S108 to step S111 is the same as that of FIG. 6.

In step S118, the cycle calculation unit 22e specifically designates a repeater directly connected to the parent wireless device 2 based on the connection information of the parent wireless device 2 maintained during the construction or reconstruction of the network.

In step S117, the cycle calculation unit 22e selects the largest value as the common cycle from the calculation cycles with respect to the specially designated repeater. The period calculation unit 22e outputs a period calculation result 43 including the selected common period and the information of the child wireless device 1 corresponding to the common period. In this case, the repeater to be specifically designated is the sub-radio 1-1 and the sub-radio 1-2 when the network configuration shown in FIG. 1 is used, for example.

** Explanation of the effect of Embodiment 7 **

In the mother wireless device of the present embodiment, a directly connected repeater is specifically designated based on the held connection information, and a maximum value is selected from a calculation period with respect to the specifically designated repeater. Therefore, in the mother wireless device of this embodiment, it is possible to reduce the power consumption of the repeater directly connected to the mother wireless device 2 which has the greatest possibility of increasing the power consumption, and to suppress the adjustment amount of the intermittent operation cycle. As a minimum.

Embodiment 8

In this embodiment, points different from the seventh embodiment will be described. In this embodiment, the same components as those in Embodiments 1 to 7 are assigned the same reference numerals, and descriptions thereof are omitted.

In the seventh embodiment, the period calculation unit 22e of the master wireless device 2 specifically designates a repeater directly connected to the master wireless device 2 based on the connection information of the master wireless device 2 in the intermittent operation period calculation process, and from the relative The maximum value is selected among the calculation periods of the specially designated repeaters. In this embodiment, the period calculation unit 22f specifies the connection information held by the master wireless device 2 and specifically specifies the directly connected relay device. In addition, the cycle calculation unit 22f selects the largest value from the calculation cycle with respect to a preset repeater among the specially designated repeaters.

FIG. 13 is a diagram showing the details of the intermittent operation cycle calculation process between the cycle calculation unit 22f in the master wireless device 2 in this embodiment. Fig. 13 corresponds to the intermittent operation period calculation process of Fig. 12 described in the seventh embodiment. Those having the same reference numerals as those in the description of the seventh embodiment operate in the same manner.

The processing from step S108 to step S118 is the same as that of FIG. 12.

In step S119, the cycle calculation unit 22e selects the largest value as the common cycle from among the calculation cycles with respect to a presetter among the specially designated repeaters. The period calculation unit 22e outputs a period calculation result 43 including the selected common period and the information of the child wireless device 1 corresponding to the common period. At this time, the relay device to be set in advance is, for example, a wireless device set as a communication path, and the communication path is a person who transfers information defined as an important person in the wireless communication system.

** Explanation of the effect of Embodiment 8 **

In the parent wireless device of this embodiment, a repeater directly connected to the parent wireless device is specifically designated based on the connection information held by the parent wireless device. In addition, in the master wireless device of the present embodiment, the maximum value is selected from among the calculation periods with respect to a preset one in a specially designated repeater. Therefore, the master wireless device according to this embodiment can select a repeater that is important for the wireless communication system to reduce the power consumption, and can reduce the adjustment amount of the intermittent operation cycle to a minimum, and can improve the Wireless communication systems are important for the continuity of the communication path.

Embodiment 9

In this embodiment, points different from the first embodiment will be described. In this embodiment, the same components as those in Embodiments 1 to 8 are assigned the same reference numerals, and descriptions thereof are omitted.

In the first embodiment, the power source monitoring unit 14 of the slave wireless device 1 constantly sends the generated power source monitoring result 35 to the wireless communication unit 15. In the present embodiment, a description will be given of a case where the power source monitoring unit 14 determines whether or not to send the power source monitoring result 35 based on the remaining power storage amount of the power storage unit 13.

FIG. 14 is a flowchart showing an intermittent operation process performed by the child wireless device 1 according to this embodiment. Fig. 14 corresponds to the intermittent operation processing of Fig. 4 described in the first embodiment. Those having the same reference numerals as those in the description of the first embodiment operate in the same manner.

The power source monitoring unit 14a proceeds to step S10 after the power source monitoring result 35 is generated in step S3.

In step S10, the power source monitoring unit 14 a compares the remaining power storage amount detected from the stored power 34 with the sixth threshold value. When the remaining power storage amount is smaller than the sixth threshold, the power source monitoring unit 14a proceeds to step S4 and operates in the same manner as in the first embodiment. That is, the power source monitoring unit 14 a transmits the power source monitoring result 35 to the wireless communication unit 15. On the other hand, when the power storage residual amount is equal to or greater than the sixth threshold, the power source monitoring unit 14 a does not transmit the power source monitoring result 35 to the wireless communication unit 15. Therefore, the wireless communication unit 15 does not store the power monitoring result 35 in a control packet or a data packet. Here, the sixth threshold value is a value obtained by adding, for example, the minimum amount of electric power required for the operation to continue and the amount of electric power that can perform the operation for a certain period of time.

** Explanation of the effect of Embodiment 9 **

In the slave wireless device of this embodiment, it is determined whether or not to send the power supply monitoring result 35 based on the remaining power storage amount. Therefore, in the sub-radio unit of this embodiment, it is not necessary to adjust the intermittent operation period, and when there is no data to be transmitted from the sub-radio unit, and no wireless packet transmission is performed, it is not necessary to separately transmit a control packet. Therefore, according to the slave wireless device of this embodiment, the number of times of wireless transmission execution can be reduced, and thus the power consumption can be reduced.

Embodiment 10

In this embodiment, points different from the first embodiment will be described. In addition, in this embodiment, the same components as those in Embodiments 1 to 9 are assigned the same reference numerals, and descriptions thereof will be omitted.

In the first embodiment, the wireless communication unit 15 of the slave wireless device 1 generates and transmits a control packet storing a power monitoring result 35 when there is no data to be transmitted. In this embodiment, the sub wireless device 1 operating as a repeater is described. When there is no data to be transmitted from the sub wireless device 1, the power monitoring result 35 is stored in a relay packet for transmission. . That is, the wireless communication unit 15a of the child wireless device 1 transmits the power supply monitoring result 35 belonging to the notification power information to a data packet or a relay packet to be relayed to the parent wireless device 2.

FIG. 15 is a flowchart showing operations in the wireless communication unit 15a of the child wireless device 1 according to this embodiment. Those having the same reference numerals as those in the description of the first embodiment operate in the same manner. Fig. 15 corresponds to steps S5 to S6 described in the fourth diagram of the first embodiment.

In step S11, the wireless communication unit 15a determines whether or not there is data to be transmitted from the slave wireless device 1. When there is data to be transmitted, the wireless communication unit 15a proceeds to step S12, and similarly to the first embodiment, the power supply monitoring result 35 is stored in a data packet for transmission.

On the other hand, when there is no data to be transmitted, the wireless communication unit 15a proceeds to step S13, and the power source monitoring result 35 is added to the packet to be relayed for transmission. At this time, the relay packets to which the power monitoring result 35 is to be added are all the packets to be relayed, or only the packets to be relayed first.

** Explanation of the effect of Embodiment 10 **

In the slave wireless device of this embodiment, when there is no data to be transmitted from the slave wireless device, the power supply monitoring result 35 is stored in a relay packet and transmitted. Therefore, according to the slave wireless device of this embodiment, it is no longer necessary to regenerate a control packet for transmission, it is possible to reduce the number of times wireless transmission is performed, and it is possible to reduce power consumption.

Embodiment 11

In this embodiment, points different from the first embodiment will be described. In this embodiment, the same components as those in Embodiments 1 to 10 are assigned the same reference numerals, and descriptions thereof are omitted.

In the first embodiment, the period calculation unit 22 of the master wireless device 2 temporarily holds the input notification power information 41 for each of the slave wireless devices 1, and updates each time it is input. In this embodiment, the cycle calculation unit 22 of the master wireless device 2 will be described based on the connection status of the slave wireless device 1 to the network to update the held notification power information 41. That is, the power source monitoring result 35 which is received from the slave wireless device 1 and which is to notify the power information is stored in the memory unit 24. In addition, the wireless communication unit 21a determines the connection status of the child wireless device 1 every time it receives the power supply monitoring result 35 from the child wireless device 1. The period calculation unit 22g discards and notifies the power information when the child wireless device 1 leaves the wireless communication system 500.

FIG. 16 is a diagram showing the details of the processing by the wireless communication unit 21a and the period calculation process by the period calculation unit 22g in the master wireless device 2 of this embodiment. Fig. 16 corresponds to steps S21 to S25 of Fig. 5 described in the first embodiment. Those having the same reference numerals as those in the description of the first embodiment operate in the same manner.

In step S21, the wireless communication unit 21a monitors whether there is a notification of the power source monitoring result 35 derived from the packet received from the slave wireless device 1.

In step S38, when there is no notification, the wireless communication unit 21a determines that it is not necessary to adjust the intermittent operation cycle of the child wireless device 1, or determines that the child wireless device 1 is not connected to the network, that is, has been disconnected. The wireless communication unit 21a sends the separation determination result as the notification power information 41.

In step S39, based on the notified power information 41, the period calculation unit 22g discards the held notification power information 41 corresponding to the slave wireless device 1 when it is determined that the slave wireless device 1 has disconnected from the network. In addition, when the period calculation unit 22g determines that it has not left, it updates the held notification power information 41 corresponding to the slave wireless device 1.

In the above description, the wireless communication unit 21a monitors the notification of the presence or absence of the power supply monitoring result 35. When there is no notification, it is determined that the child wireless device 1 has been disconnected. However, it may be set that the wireless communication unit 21a monitors whether there is a response from the child wireless machine 1 for the control packet storing the periodic adjustment information. When there is no response for a predetermined number of times, it is determined that the child wireless machine 1 has been disconnected from the network. Way off. In addition, it is also possible that the wireless communication unit 21a transmits a control packet for monitoring the state of the network at a preset timing, and when there is no response, it is determined that the sub-wireless device 1 has disconnected from the network.

** Explanation of the effect of Embodiment 11 **

In the parent wireless device of this embodiment, when the child wireless device cannot perform the notification due to the operation stop due to power exhaustion, the notification power information corresponding to the child wireless device 1 is excluded from the adjustment target of the intermittent operation cycle. . Therefore, in the parent wireless device according to this embodiment, even if the child wireless device cannot perform the notification due to the operation stop due to power exhaustion, the intermittent operation cycle can be appropriately updated. The master wireless device of this embodiment is particularly effective in the case where the power monitoring result from the slave wireless device is not necessarily notified every time.

Embodiment 12

In this embodiment, points different from the first embodiment will be described. In this embodiment, the same components as those in Embodiments 1 to 11 are assigned the same reference numerals, and descriptions thereof are omitted.

In the first embodiment, the period adjustment unit 23 of the master wireless device 2 determines whether to adjust the intermittent operation period by comparing the remaining power storage amount displayed in the notification power information 41 with a preset threshold. In the present embodiment, a description is given of a case where the cycle adjusting unit 23b determines whether to adjust the intermittent operation cycle by comparing the calculated power consumption of the child wireless device 1 with the remaining power storage amount. That is, the cycle adjustment unit 23b determines that the common period is applied to each of the plurality of sub-radio devices when the power storage residual amount is smaller than the power consumption amount in the first time.

Fig. 17 is a diagram showing a functional configuration example of the master wireless device 2a according to this embodiment. Those having the same reference numerals as those in the description of the first embodiment operate in the same manner.

In FIG. 17, in addition to the period calculation result 43, the period calculation unit 22 h sends the power consumption amount at the first time calculated in step S23 as the power prediction result 44. The period adjustment unit 23b compares the power consumption amount and the power storage residual amount at the first time to determine whether to adjust the intermittent operation period, and outputs the period adjustment information 42 reflecting the determination result.

FIG. 18 is a flowchart showing a cycle control process performed by the master wireless device 2 according to this embodiment. Fig. 18 corresponds to Fig. 5 described in the first embodiment. Those having the same reference numerals as those in the description of the first embodiment operate in the same manner.

In step S40, in addition to the cycle calculation result 43, the cycle calculation unit 22h also outputs the power consumption amount for the first time calculated in step S23 as the power prediction result 44.

In step S41, the cycle adjustment unit 23 b compares the remaining power storage amount displayed in the notification power information 41 with the power consumption amount at the first time notified by the power prediction result 44. When the remaining power storage amount is smaller than the power consumption amount at the first time, the cycle adjustment unit 23b proceeds to step S27, and determines that the adjustment of the intermittent operation cycle is performed. On the other hand, when the remaining power storage amount is equal to or greater than the power consumption amount for the first time, the cycle adjustment unit 23b proceeds to step S29 and determines that the adjustment of the intermittent operation cycle is canceled.

*** Explanation of the effect of Embodiment 12 ***

In the master wireless device of this embodiment, the power consumption of each of the wireless devices is used to determine whether to adjust the intermittent operation period. Therefore, even when the operating states of the multiple wireless devices are different, it is possible to perform an operation in accordance with the actual power storage state. Judge.

Embodiment 13

In this embodiment, points different from the embodiment 12 will be described. In this embodiment, the same components as those in Embodiments 1 to 12 are assigned the same reference numerals, and descriptions thereof are omitted.

In the twelfth embodiment, the cycle adjusting unit 23b of the master wireless device 2a determines whether or not to adjust the intermittent operation period by comparing the calculated power consumption of the slave wireless device 1 with the remaining power storage amount. In the present embodiment, a description is given of a case where it is determined whether to adjust the intermittent operation cycle by comparing the calculated power consumption amount of the child wireless device 1 and the sum of the remaining power storage amount and the predicted power generation amount. That is, the period adjustment unit 23b determines that when the sum of the predicted power generation amount and the power storage residual amount generated at the first time is smaller than the power consumption amount at the first time, it is determined that the common period is to be applied to the plurality of sub-wireless devices. Each wireless device.

Fig. 19 is a flowchart showing a cycle control process performed by the master wireless device 2 according to this embodiment. Fig. 19 is equivalent to Fig. 8 described in the twelfth embodiment. Those having the same reference numerals as those in the description of the twelfth embodiment operate in the same manner.

In step S42, in addition to the cycle calculation result 43, the cycle calculation unit 22i uses the power consumption amount at the first time calculated in step S23 and the predicted power generation amount per hour calculated in step S22 as the power prediction. The result 44 is output.

In step S43, the cycle adjustment unit 23c compares the sum of the remaining power storage amount displayed in the notification of the power information 41 with the average predicted power generation amount per first time notified through the power prediction result 44 and the power prediction result 44 The power consumption for a certain period of time. When the sum of the remaining power storage amount and the average predicted power generation amount per first time is smaller than the first time power consumption amount, the cycle adjustment unit 23c proceeds to step S27 to determine the execution of the intermittent operation cycle. On the other hand, when the sum of the residual power storage amount and the average predicted power generation amount per first time is equal to or more than the first time power consumption amount, the cycle adjustment unit 23c proceeds to step S29 to determine that the adjustment of the intermittent operation cycle is canceled.

** Explanation of the effect of Embodiment 13 **

In the master wireless device of this embodiment, it is determined whether or not to adjust the intermittent operation cycle using the power consumption amount and the predicted power generation amount of each of the slave wireless devices. Therefore, in the master wireless device according to this embodiment, even when the operating conditions of the plurality of slave wireless devices are different, it is possible to make a judgment in accordance with the actual state of power storage and power generation.

Embodiment 14

In this embodiment, points different from the first embodiment will be described. In addition, in this embodiment, the same components as those in Embodiments 1 to 13 are assigned the same reference numerals, and descriptions thereof will be omitted.

In the first embodiment, the cycle calculation unit 22 of the master wireless device 2 calculates the power consumption of the first time from the power consumption of the slave wireless device 1 in each operation state and the duration of each operation state. In this embodiment, a description will be given of a case where the period calculation unit 22 calculates the power consumption amount at the first time using the connection state of the slave wireless device 1.

Fig. 20 is a diagram showing an example of a functional configuration of a child wireless device 1a according to this embodiment. Those with the same reference numerals as those described in the first embodiment operate in the same manner. In FIG. 20, the wireless communication unit 15b stores connection state information such as the number of wireless devices connected to the child wireless device 1a and the amount of communication data, and stores it in a data packet or a control packet for transmission.

Fig. 21 is a diagram showing an example of a functional configuration of a master wireless device 2b according to this embodiment. Those having the same reference numerals as those in the description of the first embodiment operate in the same manner. In FIG. 21, the wireless communication unit 21b extracts notification power information 41 and connection status information 45 from the received packet. The cycle calculation unit 22j predicts the power generation amount for each elapsed time based on the notified power information 41, and calculates the power consumption amount for the first time based on the connection state information 45. Here, the number of connected wireless devices and the amount of communication data shown in the connection status information 45 are those that will affect the number of transmission and reception times and the transmission and reception time of the relay packet in the child wireless device 1a. In other words, when the number of connected wireless devices or the amount of communication data is large, the power consumption caused by packet transmission and reception will increase.

FIG. 22 is a diagram showing the details of the processing by the wireless communication unit 21b and the period calculation process by the period calculation unit 22j in the master wireless device 2 in this embodiment. Fig. 22 corresponds to steps S21 to S25 in Fig. 5 described in the first embodiment. Those having the same reference numerals as those in the description of the first embodiment operate in the same manner.

In step S44, the wireless communication unit 21b extracts the notification power information 41 and the connection status information 45 from the received packet and outputs them.

In step S22, the cycle calculation unit 22j predicts the power generation amount for each elapsed time based on the information of the power generation amount displayed in the notification power information 41.

In step S45, the period calculation unit 22j calculates the power consumption of the sub-wireless device 1 when the sub-wireless device 1 operates only for the first time based on the information of the number of connected wireless devices and the amount of communication data displayed in the connection status information 45.

In step S24, the cycle calculation unit 22j calculates an intermittent operation cycle in which the amount of power consumed in the operation for the first amount of time does not exceed the amount of available power in the total of the remaining power storage amount and the predicted power generation amount. In addition, the period calculation unit 22j selects a value applicable to all the slave wireless devices 1 in the calculated intermittent operation period.

In step S25, the period calculation unit 22j outputs a period calculation result 43 which includes information of the selected intermittent operation period and the child wireless device 1 corresponding to the intermittent operation period.

In addition, in addition to the cycle calculation result 43, the cycle calculation unit 22j may also calculate the power consumption amount for the first time calculated in step S45 or the power consumption amount for the first time calculated in step S45. The predicted power generation amount calculated in step S22 is sent as a power prediction result 44.

*** Explanation of the effect of Embodiment 14 ***

In the wireless communication system of this embodiment, the power consumption of the first time is calculated using the connection status of the slave wireless devices. Therefore, in the wireless communication system of this embodiment, even when the connection status of the plurality of slave wireless devices is different, and the number of times of transmitting and receiving the relay packet is different, the power consumption amount in accordance with the actual power consumption state can be calculated. Therefore, in the wireless communication system according to this embodiment, it is possible to determine whether or not to adjust the intermittent operation cycle according to the actual operation state.

In summary, Embodiments 1 to 14 have been described. In Embodiments 1 to 14, each device is configured in the form of a functional block independent of each part of each device of the child wireless device and the parent wireless device. However, the configuration may not be the same as that of the embodiment described above. The structure of the functional blocks of each device may be arbitrary as long as the functions described in the above embodiment can be realized. It is also possible to form each of these functional blocks with any other combination or arbitrary block configuration.

Although Embodiments 1 to 14 have been described, a plurality of portions in these embodiments may be implemented in combination. Alternatively, one of these embodiments may be implemented. In addition, these embodiments may be implemented by combining them in whole or in part.

In addition, the above-mentioned embodiment is essentially a good example, and the present invention is not intended to limit the scope of the application and use, and various changes can be made as needed.

Claims (22)

A wireless communication system includes a mother wireless machine and a plurality of child wireless machines, the mother wireless machine and the plurality of child wireless machines perform wireless communication; each of the child wireless machines of the plurality of child wireless machines includes: a power generation section, which performs Power generation; and a power storage unit that stores power generated by the power generation unit; the parent wireless unit includes a period calculation unit that calculates each sub wireless unit for each of the plurality of sub wireless units; The amount of power available at the first time is the amount of available power, and the intermittent operation period is calculated as the calculation period, and each of the plurality of calculation periods for the plurality of sub-radio devices is selected from the plurality of calculation periods calculated for the plurality of sub-radio devices. The common calculation period of the wireless devices is regarded as a common period. The intermittent operation period is the period of the intermittent operation of dormant after each wireless device operates, and when each of the wireless devices performs the foregoing intermittent operation for the first time. The amount of power consumption does not exceed the above-mentioned amount of usable power; and the period adjustment section, which is based on the foregoing A cycle is selected as the remaining amount of the storage sub-cycles of common radio, to determine whether to be applied to the common cycle of the plurality of sub-unit of the sub wireless radio. According to the wireless communication system of the first patent application scope, wherein the parent wireless unit includes a wireless communication unit, the wireless communication unit is determined by the period adjustment unit to apply the common period to each of the plurality of child wireless units. In the case of a sub-radio device, cycle adjustment information including information for performing the intermittent operation using the common period is transmitted to each sub-radio device of the plurality of sub-radio devices. According to the wireless communication system according to item 1 or 2 of the scope of patent application, the period calculation unit calculates the power when each of the wireless devices performs the intermittent operation for the first time for each of the multiple wireless devices. The intermittent operation period in which the consumption amount does not exceed the minimum amount of usable power is used as the calculation period. According to the wireless communication system according to item 1 or 2 of the scope of patent application, wherein the period calculation unit uses the average unit power generation amount per unit time generated by the power generation unit, and calculates an increase in the remaining amount of power stored in the power storage unit. The time until the first power storage amount is taken as the first time. The wireless communication system according to item 4 of the scope of patent application, wherein the period calculation unit uses the unit power generation amount to calculate the power generation amount at the first time as the predicted power generation amount, and compares the predicted power generation amount with the power storage residual amount. The value of the sum of minus the minimum amount of power to be consumed by each wireless device in the first time is set as the available power amount. The wireless communication system according to item 5 of the scope of the patent application, wherein the aforementioned sub-wireless unit includes a power source monitoring unit, and the power source monitoring unit transmits notification power information including information on the power generation amount of the aforementioned power generation unit to the aforementioned parent radio; The period calculation unit calculates the unit power generation amount per unit time of the average power generated by the power generation unit based on the power generation amount information included in the notified power information, and calculates the first time based on the unit power generation amount. According to the wireless communication system according to item 1 or 2 of the scope of patent application, wherein the aforementioned period adjustment unit determines that the above-mentioned common period is to be applied to each of the sub-radio of the plurality of sub-wireless devices when the above-mentioned power storage residual is smaller than the first threshold When the power storage residual amount is greater than the second threshold, it is determined that the common period is not to be applied to each of the plurality of sub-radio devices. According to the wireless communication system according to item 1 or 2 of the scope of patent application, the period adjustment unit determines whether the sub wireless device operates as a repeater, and when the sub wireless device does not operate as the repeater, when the foregoing power storage residual capacity is smaller than The first threshold value is small, and it is determined that the common period is to be applied to each of the plurality of sub-wireless devices. When the power storage residual is larger than the second threshold value, it is determined not to apply the common period to the complex number. Each sub-radio of each sub-radio, when operating as the repeater, is determined to apply the common period to the third common threshold when the third storage threshold is smaller than the first threshold. When each of the plurality of sub-wireless radios has a larger power reserve than a fourth threshold greater than the second threshold, it is determined not to apply the common period to each of the plurality of sub-wireless radios. . The wireless communication system according to item 1 or 2 of the scope of the patent application, wherein the parent wireless unit includes a memory unit, and the memory unit stores information on the power generation amount of the power generation unit for each of the plurality of sub wireless units. The period calculation unit calculates the first time based on the information on the power generation amount. The wireless communication system according to item 1 or 2 of the scope of the patent application, wherein the sub wireless unit includes a power source monitoring unit, and the power source monitoring unit transmits notification power information including information on the power generation amount of the power generating unit to the parent wireless machine. ; The above-mentioned parent wireless unit includes a memory unit, which stores information on the power generation amount of the power generation unit for each of the plurality of sub-wireless wireless units; the period calculation unit is when the power storage residual amount is higher than a fifth threshold Is an hour, based on the information on the amount of power generation contained in the notified power information, the average unit power generation per unit time generated by the power generation unit is calculated, and the first time is calculated based on the unit power generation amount. When the residual amount is equal to or greater than the fifth threshold, the first time is calculated based on the information on the power generation amount. The wireless communication system according to item 1 or 2 of the scope of patent application, wherein the period calculation unit selects the largest calculation period among the plurality of calculation periods as the common period. The wireless communication system according to item 1 or 2 of the scope of patent application, wherein the period calculation unit selects the calculation of the plurality of calculation periods in which the number of child wireless devices corresponding to a calculation period greater than the calculation period becomes less than a certain number. The cycle is the aforementioned common cycle. The wireless communication system according to item 1 or 2 of the scope of the patent application, wherein the period calculation unit selects the child wireless device from the plurality of child wireless devices according to the network topology of the wireless communication system, and selects the selected child wireless device. The maximum calculation cycle among the calculation cycles is referred to as the aforementioned common cycle. The wireless communication system according to item 1 or 2 of the scope of the patent application, wherein the period calculation section selects the child wireless devices connected to the parent wireless device from the plurality of child wireless devices, and selects one of the calculation periods of the selected child wireless devices The maximum calculation period is the common period. The wireless communication system according to item 1 or 2 of the scope of the patent application, wherein the aforementioned wireless device includes a power supply monitoring section, and when the power storage residual amount is smaller than the sixth threshold, the power generation amount of the power generation section will be included The power information is transmitted to the aforementioned wireless device. According to the wireless communication system according to Item 15 of the scope of the patent application, the aforementioned wireless device is transmitted to the parent wireless device by attaching the aforementioned notification power information to a data packet, a control packet, or a relay packet to be relayed. The wireless communication system according to item 6 of the scope of patent application, wherein the period calculation unit stores the notification power information received from the sub-wireless machine in the memory unit, and determines the sub-channel every time it receives from the sub-wireless machine. In the connection state of the wireless device, when the child wireless device is disconnected from the wireless communication system, the notification power information is discarded. According to the wireless communication system according to item 1 or 2 of the scope of patent application, wherein the aforementioned period adjustment section is to determine that the common period is to be applied to the plurality of sub-cycles when the remaining power storage amount is smaller than the power consumption amount in the first time. Each wireless device of the wireless device. The wireless communication system according to item 1 or 2 of the scope of the patent application, wherein the period adjustment section is when the sum of the predicted power generation amount generated in the first time and the power storage residual amount is smaller than the power consumption amount in the first time, It is determined that the common period is to be applied to each of the plurality of child radios. According to the wireless communication system according to item 1 or 2 of the scope of patent application, the period calculation unit is based on the number of connected wireless devices belonging to the number of child wireless devices connected to the child wireless device, and the amount of communication data of the child wireless device. Calculate the power consumption in the first time. A wireless communication method is a wireless communication method of a wireless communication system. The wireless communication system includes a parent wireless machine and a plurality of child wireless machines. The parent wireless machine and the plurality of child wireless machines perform wireless communication. Each sub-wireless unit includes: a power generation unit that generates power; and a power storage unit that stores power generated by the power generation unit; the period calculation unit of the parent wireless unit is configured for each of the plurality of sub-wireless units. The sub-wireless machine calculates the amount of power that can be used by each sub-wireless machine at the first time as the amount of available power, and calculates the intermittent operation cycle as the calculation cycle, and selects from the plurality of calculation cycles calculated for the plurality of sub-wireless machines. The common calculation cycle applied to each of the plurality of sub-wireless radios is referred to as a common period, wherein the intermittent operation period is a period of intermittent action of dormancy after each sub-wireless radio operates, and for each sub-wireless radio to apply the foregoing The power consumption when the intermittent operation is performed for the first time does not exceed the available power The period adjustment unit of the parent wireless device is selected based on the remaining storage capacity of the child wireless device of the common period according to the calculation period to determine whether to apply the common period to each of the child wireless devices of the plurality of child wireless devices. . A wireless communication program product is a wireless communication program product of a parent wireless device that performs wireless communication with a plurality of child wireless devices; each of the wireless devices of the foregoing plurality of child wireless devices includes: a power generation section that generates power; and a power storage section, The wireless communication program product causes the parent wireless machine belonging to the computer to perform the following processing: the period calculation processing is performed for each of the child wireless machines of the plurality of child wireless machines. The amount of power that can be used by each wireless device at the first time is the available power, and the intermittent operation period is calculated as the calculation period, and the plurality of calculation periods calculated for the plurality of wireless devices are selected to be applied to the plurality of wireless devices. The common calculation period of each wireless device of the wireless device is regarded as a common period. The intermittent operation period is a period of intermittent operation of sleep after each wireless device operates, and the foregoing intermittent operation is performed for each wireless device. The power consumption at the first time does not exceed the above-mentioned available power; period The entire process, calculated from the preceding line period is selected as the remaining amount of the sub power storage period common to the wireless device, to determine whether to be applied to the common cycle of the plurality of sub-unit of the sub wireless radio.