JP-7857191-B2 - Wireless communication device, wireless communication system, and wireless communication method

Inventors

• 池田 浩太郎
• 國立 忠秀

Assignees

• 矢崎総業株式会社

Dates

Publication Date

20260512

Application Date

20220905

Claims (6)

1. A wireless communication device that constitutes a communication system that transmits data to a destination according to a predetermined relay sequence, A received data acquisition unit that acquires received data from another terminal, specifically the radar waves emitted from the terminal immediately preceding the local terminal in the relay sequence, and transmitted sensor information from that terminal. A timing calculation unit calculates a first reception interval based on the reception time of the radar waves and sensor information of the other terminal, and calculates the communication timing of the local terminal based on the first reception interval. A sensor information acquisition unit that emits its own terminal radar waves at the aforementioned communication timing, acquires its own terminal sensor information based on the reflected waves of the said terminal radar waves, and stores it in a storage unit, A transmission data generation unit that generates transmission data including at least the aforementioned terminal sensor information, A wireless communication device comprising a transmission data transmission unit that transmits the transmission data to the next terminal in the relay sequence.
2. The wireless communication device according to claim 1, wherein the timing calculation unit calculates the next communication timing of its own terminal based on the first reception interval and a predetermined number of terminals constituting the communication system.
3. The timing calculation unit calculates a second reception interval based on the time interval between the radar waves transmitted from two different other terminals. The wireless communication device according to claim 2, wherein the timing calculation unit calculates the communication timing based on the second reception interval if the second reception interval is greater than the first reception interval.
4. It is further equipped with solar panels to generate electricity, A wireless communication device according to any one of claims 1 to 3, which operates based on the power generated by the solar panel.
5. A wireless communication system that transmits data according to a predetermined relay sequence, Multiple wireless communication devices, It comprises a collection module which is the destination for the purpose of data transmission, The aforementioned wireless communication device is A received data acquisition unit that acquires received data from another terminal, specifically the radar waves emitted from the terminal immediately preceding the local terminal in the relay sequence, and transmitted sensor information from that terminal. A timing calculation unit calculates a first reception interval based on the reception time of the radar waves and sensor information of the other terminal, and calculates the communication timing of the local terminal based on the first reception interval. A sensor information acquisition unit that emits its own terminal radar waves at the aforementioned communication timing, acquires its own terminal sensor information based on the reflected waves of the said terminal radar waves, and stores it in a storage unit, A transmission data generation unit that generates transmission data including at least the aforementioned terminal sensor information, A wireless communication system comprising a transmission data transmission unit that transmits the transmission data to the next terminal in the relay sequence.
6. A wireless communication method performed by a computer, The radar waves emitted from the other terminal immediately preceding the terminal in the relay sequence and the transmitted sensor information of the other terminal are acquired as received data. Based on the reception time of the radar waves from the other terminal and the sensor information from the other terminal, the first reception interval is calculated. Based on the first reception interval, the communication timing of the terminal is calculated. At the aforementioned communication timing, the terminal emits radar waves, Sensor information is acquired based on the reflected waves of the aforementioned terminal's radar waves. Generate transmission data that includes at least the sensor information, A wireless communication method for transmitting the transmission data to the next other terminal in the relay sequence.

Description

This invention relates to a wireless communication device, a wireless communication system, and a wireless communication method. Conventionally, communication systems have been proposed for relaying data acquired by sensors and transmitting it to a target location. Patent Document 1 discloses a wireless sensor system comprising multiple wireless sensor devices and a wireless relay device. The wireless sensor system disclosed in Patent Document 1 relays sensor data acquired by the sensors of the wireless sensor devices via the wireless relay device and transmits it to a wireless sensor aggregation station. International Publication No. 2019/175966 This figure shows the configuration of the wireless communication system according to this embodiment.This diagram shows the configuration of the wireless communication device according to this embodiment.This diagram shows the configuration of the sensor communication terminal according to this embodiment.This is a block diagram showing the functional configuration of the sensor communication terminal according to this embodiment.This diagram illustrates the configuration of the storage unit of the sensor communication terminal according to this embodiment.This figure shows an example of the data format of a communication packet in the wireless communication system according to this embodiment.This figure shows an example of the data format for received and transmitted data in the wireless communication system according to this embodiment.This diagram illustrates the data flow in the wireless communication system according to this embodiment.This flowchart shows an example of processing by the wireless communication device according to this embodiment.This flowchart shows an example of processing by the wireless communication device according to this embodiment.This flowchart shows an example of processing by the wireless communication device according to this embodiment.This flowchart shows an example of processing by the wireless communication device according to this embodiment.This flowchart shows an example of processing by the wireless communication device according to this embodiment. The wireless communication system 1 according to this embodiment will be described in detail below with reference to the drawings. Note that the dimensional ratios in the drawings are exaggerated for illustrative purposes and may differ from actual ratios. Furthermore, in the following drawings, identical or similar parts are denoted by the same or similar reference numerals. (Wireless communication system 1) Figure 1 shows the configuration of the wireless communication system 1 according to this embodiment. The wireless communication system 1 is installed, for example, inside a bus and detects the flow of people and lost items in an environment where many people enter and exit. The detected data is also notified to a monitor that can be viewed by the driver, or to a data center of the operating company or management company. The wireless communication system 1 is composed of a plurality of wireless communication devices 10a to 10d and a data collection module 20. When it is not necessary to distinguish between each of the wireless communication devices 10a to 10d, they are simply referred to as "wireless communication device 10". Furthermore, while Figure 1 shows an example where the number of wireless communication devices 10 in the wireless communication system 1 is four, the number of wireless communication devices 10 is not limited to the configuration of the embodiment. For example, the number of wireless communication devices 10 in the wireless communication system 1 may be more or less than four. Furthermore, in this embodiment, the wireless communication system 1 is a communication system that transmits data to the destination according to a predetermined relay sequence by relaying data using the wireless communication device 10. For example, the predetermined relay order corresponds to the ascending order of the numbers assigned to each of the wireless communication devices 10a to 10d in the example shown in Figure 1, specifically to wireless communication device 10a, wireless communication device 10b, wireless communication device 10c, and wireless communication device 10d. That is, in the example shown in Figure 1, wireless communication device 10a is the communication initiation terminal (start terminal). Also, in the example shown in Figure 1, the destination corresponds to the collection module 20. The wireless communication device 10 includes a sensor communication terminal 100, which will be described later. The wireless communication device 10 also transmits the sensor information acquired (sensed) by the sensor communication terminal 100 to the next wireless communication device 10 in a predetermined relay sequence. In the example shown in Figure 1, wireless communication device 10a transmits sensor information to wireless communication device 10b via path