Wireless device and logistics tracking system

Abstract

The invention provides a wireless device and a logistics tracking system. The wireless device and the logistics tracking system can detect the situation that the wireless device and the logistics tracking system are not mounted on an aircraft and can appropriately switch communication modes. The wireless device is a mobile wireless device, and is provided with: a sensor unit that measures the displacement of the wireless device; a transmission unit that transmits a signal including information relating to the wireless device; a storage unit that stores a predetermined displacement condition in advance and stores the displacement history measured by the sensor unit; and a control unit that controls the communication mode of the transmission unit on the basis of the predetermined displacement condition and displacement history stored in the storage unit. The control unit controls the communication mode of the transmission unit to either a low output mode in which the transmission output power of the signal from the transmission unit is suppressed to a predetermined value or less, or a high output mode in which the transmission output power of the signal from the transmission unit is greater than the predetermined value. If it is determined that the wireless device is not mounted on the aircraft on the basis of a predetermined displacement condition and displacement history, the communication mode of the transmission unit is set to a high output mode.

Description

Technical Field

[0001] The present disclosure relates to wireless devices and logistics tracking systems. Background Art

[0002] Conventionally, there is a wireless device management method in which a wireless device is managed by a processor of the device in an airplane. The processor switches the wireless device from a first mode to a second mode based on data indicating a change in the flight state of the airplane, one of the first mode and the second mode being a state of the wireless device in which the transmitter of the wireless device stops working, and the other of the first mode and the second mode being a state of the wireless device in which the transmitter is working. When data indicating that the airplane takes off is received, the wireless device is switched from a normal mode to an invalid mode, and when data indicating that the airplane reaches a cruising altitude is received, the wireless device is switched from the invalid mode to an airborne mode (for example, refer to Patent Document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application No. 2012-523987 Summary of the invention

[0006] Problems to be solved by the invention

[0007] By the way, for wireless devices installed in aircraft, there are strict restrictions on communication output power in order not to hinder the flight of the aircraft. Therefore, in the previous wireless device management method, when the aircraft takes off or reaches the cruising altitude, the mode of the wireless device is changed.

[0008] However, it is very difficult for wireless devices such as wireless equipment to detect at the right time that the aircraft is performing navigation actions such as reverse thrust, taxiing, takeoff, cruising, descent and landing, and it is difficult to remove the strict restrictions on communication output power.

[0009] Therefore, an object of the present invention is to provide a wireless device and a logistics tracking system that can detect that an aircraft is not in flight and appropriately switch the communication mode.

[0010] Means used to solve problems

[0011] The wireless device of the embodiment of the present disclosure is a mobile wireless device, which includes: a sensor unit that measures the displacement of the above-mentioned wireless device; a transmission unit that transmits a signal including information related to the above-mentioned wireless device; a storage unit that pre-stores a specified displacement condition and stores a displacement history measured by the above-mentioned sensor unit; and a control unit that controls a communication mode of the above-mentioned transmission unit based on the above-mentioned specified displacement condition and the above-mentioned displacement history stored in the above-mentioned storage unit; the above-mentioned control unit controls the communication mode of the above-mentioned transmission unit to be either a low output mode in which the transmission output power of the above-mentioned signal of the above-mentioned transmission unit is suppressed to be below a specified value or a high output mode in which the transmission output power of the above-mentioned signal of the above-mentioned transmission unit is greater than the above-mentioned specified value, and if it is determined based on the above-mentioned specified displacement condition and the above-mentioned displacement history that the above-mentioned wireless device is not carried on an aircraft, the communication mode of the above-mentioned transmission unit is set to the above-mentioned high output mode.

[0012] Effects of the Invention

[0013] A wireless device and a logistics tracking system can be provided that can detect that the device is not on board an aircraft and appropriately switch the communication mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a diagram showing an example of a usage form of the wireless device according to the embodiment.

[0015] Figure 2 This is a diagram showing an example of a usage form of the wireless device according to the embodiment.

[0016] Figure 3 This is a diagram showing an example of the structure of a logistics tracking system according to an embodiment.

[0017] Figure 4 This is a diagram showing an example of the structure of a wireless device.

[0018] Figure 5 This is a flowchart showing an example of processing executed by the control unit. DETAILED DESCRIPTION

[0019] Hereinafter, embodiments of a wireless device and a logistics tracking system to which the present disclosure is applied will be described.

[0020] <Implementation Method>

[0021] Figure 1 and Figure 2 FIG. 1 is a diagram showing an example of a usage form of the wireless device 100 according to the embodiment. Figure 1 , a state where an article 50 equipped with a wireless device 100 is carried on an airplane 10 for transportation is shown. Figure 2, a state in which an article 50 equipped with the wireless device 100 is transported by being loaded on a truck 20 is shown. The wireless device 100 is a mobile wireless device mounted on the article 50 transported by the airplane 10 or the truck 20.

[0022] As an example, the wireless device 100 is a device that transmits a signal indicating position information. The signal transmitted by the wireless device 100 is not limited to the signal indicating position information, and here, as an example, a mode of transmitting a signal indicating position information is described.

[0023] Figure 3 1 is a diagram showing an example of a structure of a logistics tracking system 300 according to an embodiment. The logistics tracking system 300 includes a wireless device 100 and a server 200. The server 200 is an example of an information processing device. There may be a plurality of wireless devices 100 included in the logistics tracking system 300. The server 200 can perform data communication with each wireless device 100 via the base station 30A through the network 30 formed by the base station 30A, receive signals transmitted from each wireless device 100, and manage the position of each wireless device 100.

[0024] Item 50 is as follows Figure 1 As shown in the case of being transported by aircraft 10 and as Figure 2 The case where the article 50 is transported by a truck 20 as shown. In addition, the article 50 may also be transported by a ship. The transportation of the article 50 by the airplane 10 is air transportation. The transportation of the article 50 by the truck 20 is land transportation, and the transportation of the article 50 by a ship is water transportation. Water transportation is transportation by a ship sailing on the ocean or river.

[0025] The article 50 is transported to various locations by air transport, land transport or water transport, and the wireless device 100 mounted on the article 50 is also moved to various locations. The wireless device 100 outputs a signal indicating position information at a predetermined time interval or at a predetermined timing. The logistics tracking system 300 receives the signal transmitted by each wireless device 100 and manages the location (position) of each article 50 to which each wireless device 100 is mounted.

[0026] By the way, in the case of air transportation, the transmission output power of the wireless device 100 is limited for reasons of navigation safety of the aircraft 10. As such a limitation, for example, in order to comply with RTCA DO160 Section 21 Category H, the transmission output power is required to be below 20 dBm (100 mW). Therefore, when the wireless device 100 is in air transportation, it switches to a low output mode that suppresses the transmission output power to below 20 dBm. The signal transmitted in the low output mode below 20 dBm is at a level at which the base station 30A may fail to receive the signal in an environment where the radio wave strength of the base station 30A is lower than a certain standard. In other words, the signal is at a level at which the base station 30A fails to receive the signal and the server 200 cannot receive the signal via the network 30.

[0027] Furthermore, if the wireless device 100 determines that it is not on the aircraft 10 and the radio wave strength of the base station 30A is low, it switches to the high output mode in which the transmission output power is increased to a predetermined output power greater than 20 dBm. The signal transmitted by the wireless device 100 in the high output mode is received by the server 200 via the network 30.

[0028] Under the most stringent conditions, the wireless device 100 needs to be switched to the low-output mode, for example, when the article 50 equipped with the wireless device 100 is loaded into the aircraft 10 and the loading door is closed in preparation for takeoff. Furthermore, when the aircraft 10 arrives at the destination and the wireless device 100 can be switched from the low-output mode to the high-output mode, under the most stringent conditions, it is the stage after the loading door is opened. That is, under the most stringent conditions, the wireless device 100 needs to be switched to the low-output mode during the period from closing the loading door to performing the flight operation of the aircraft 10 such as reverse thrust, taxiing, takeoff, cruising, descent, and landing, until the loading door is opened.

[0029] The following describes a specific configuration of the wireless device 100 and a control method for switching the communication mode to either the high output mode or the low output mode. The wireless device 100 does not detect that the aircraft 10 is flying, but performs switching control based on a reverse concept to set the communication mode to the high output mode when it is determined that the wireless device 100 is not on the aircraft 10 and when necessary. Therefore, the communication mode of the wireless device 100 is based on the low output mode, and is switched to the high output mode when it is determined that the wireless device 100 is not on the aircraft 10. While the wireless device 100 is powered on, it continuously transmits a signal including information related to the wireless device 100 in the low output mode or the high output mode at a certain time interval.

[0030] <Configuration of Wireless Device 100>

[0031] Figure 4 1 is a diagram showing an example of the structure of the wireless device 100. The wireless device 100 includes a housing 101, a sensor unit 110, a transmitter 120, a storage unit 130, a control unit 140, an environment sensor 150, a display 160, a switch 170, a power connector 180, and a battery 190. The housing 101 is, for example, a resin housing, and houses the sensor unit 110, the transmitter 120, the storage unit 130, the control unit 140, the environment sensor 150, the display 160, the switch 170, the power connector 180, and the battery 190. In addition, the display 160, the switch 170, and the power connector 180 are partially exposed on the surface of the housing 101.

[0032] The sensor unit 110 is a sensor for measuring the displacement of the wireless device 100, and includes an acceleration sensor 111 and a GNSS (Global Navigation Satellite System) receiver 112. The GNSS receiver 112 is an example of a position detection sensor. The displacement of the wireless device 100 is, for example, a change in acceleration, velocity, or position of the wireless device 100.

[0033] The acceleration sensor 111 detects the acceleration accompanying the movement of the wireless device 100, and outputs it to the MCU (MicroController Unit) 141. The GNSS receiver 112 has an antenna for receiving signals from GNSS satellites. The GNSS receiver 112 detects the position of the wireless device 100 based on the received signal, and outputs it to the MCU 141. In addition, the speed of the wireless device 100 can be obtained based on the acceleration detected by the acceleration sensor 111 or the position detected by the GNSS receiver 112.

[0034] The transmitting unit 120 includes an LTE (Long Term Evolution) communication unit 121. The LTE communication unit 121 includes an antenna and a SIM card is inserted therein. The communication mode of the transmitting unit 120 is controlled by the MCU 141 and is set to either a high output mode or a low output mode. The transmitting unit 120 transmits a signal including information related to the wireless device 100. The information related to the wireless device 100 may include, in addition to the ID (Identifier) ​​of the wireless device 100, displacement information indicating displacement of the wireless device 100. The displacement information includes position information indicating a position detected by the GNSS receiver 112. In addition, the displacement information may include, in addition to the position information, information indicating acceleration or speed of the wireless device 100. In addition, the communication unit 121 is not limited thereto, and a communication unit that communicates using 5G (Fifth Generation) or 6G (Sixth Generation) may also be used.

[0035] In addition, when the transmission unit 120 is in the low output mode, the transmission output power of the signal of the transmission unit 120 is equal when the wireless device 100 is mounted on the aircraft and when the wireless device 100 is not mounted on the aircraft. The wireless device 100 continuously transmits a signal including information related to the wireless device 100 at a certain time interval while the power is turned on. In the low output mode, since it is not particularly distinguished whether the wireless device 100 is mounted on the aircraft or not, the transmission output power of the signal of the transmission unit 120 is equal when the wireless device 100 is mounted on the aircraft and when the wireless device 100 is not mounted on the aircraft.

[0036] The storage unit 130 stores data indicating a predetermined displacement condition in advance, and stores the displacement measured by the sensor unit 110 as a displacement history. As an example, the predetermined displacement condition is a condition indicating a change over time in the displacement of the wireless device 100 indicating that the wireless device 100 is moving in land transportation or water transportation. More specifically, the condition indicating that the displacement of the wireless device 100 indicating that the wireless device 100 is moving in land transportation or water transportation includes at least one of the following: (1) the displacement history of the wireless device 100 in the past first predetermined time corresponds to the movement and stop mode of land transportation or water transportation; (2) the state in which the moving speed of the wireless device 100 is less than the minimum speed of the flying aircraft 10 continues for more than a second predetermined time; or (3) the displacement history for more than a third predetermined time corresponds to land transportation or water transportation. Here, as an example, a condition for indicating the displacement of the wireless communication device 100 indicating that the wireless communication device 100 is moving during land transportation or water transportation will be described in a form including all of the conditions (1) to (3).

[0037] Here, regarding condition (1), the first predetermined time is, for example, 6 hours. In addition, movement means that the position of the wireless device 100 changes with the passage of time. Stopping means that the position of the wireless device 100 does not change with the passage of time. The so-called movement and stop pattern of land transportation or water transportation is not a displacement pattern that may occur in air transportation, but a movement and stop pattern that may occur by land transportation or a change pattern of acceleration that may occur by water transportation. This is because, if the displacement history of the wireless device 100 in the past 6 hours conforms to the movement and stop pattern of land transportation or water transportation, it can be considered that the wireless device 100 is not moved by air transportation but by land transportation or water transportation.

[0038] In addition, regarding condition (2), the minimum speed of the aircraft 10 in flight is, for example, 60 km / h, which is the take-off speed of a propeller plane, and the second predetermined time is, for example, 30 minutes. This is because if the movement at a speed lower than 60 km / h continues for more than 30 minutes, it can be considered that the wireless device 100 is not transported by air but is moved by land or water.

[0039] In addition, regarding condition (3), the third prescribed time is 15 minutes as an example. From the displacement history of the past 15 minutes, it is consistent with land transportation or water transportation. For example, there is repeated movement for 5 minutes and stop for 1 minute, which can be considered as moving in land transportation, or although it is a continuous movement of more than 60 km / h, the position information is along the path of the highway, so it can be inferred that it is land transportation. In addition, the same is true for water transportation.

[0040] The predetermined displacement condition may be any condition indicating the displacement of the wireless device 100 indicating that the wireless device 100 is moving in land transport or water transport, and the above-mentioned conditions (1) to (3) are merely examples. In particular, the first predetermined time, the minimum speed of the aircraft 10 in flight, the second predetermined time, or the third predetermined time may be appropriately changed in value according to the region where the wireless device 100 is used, the type of the article 50, the type of the aircraft 10, etc. Furthermore, since it is possible to determine that the wireless device 100 is moving in land transport or water transport by using at least one of the conditions (1) to (3), it is also possible to use any one or two of the conditions (1) to (3) for determination.

[0041] The control unit 140 includes an MCU 141 and a power supply circuit 142. The MCU 141 is implemented by a computer including a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), an input / output interface, an internal bus, and the like.

[0042] Based on the specified displacement conditions and displacement history stored in the storage unit 130, the MCU 141 compares the data indicating the change over time of the displacement presented by the specified displacement conditions with the data indicating the change over time of the displacement presented by the displacement history, and sets the communication mode of the transmission unit 120 to either the high output mode or the low output mode. The specific setting method will be described in detail in the following sections. Figure 5 The flowchart will be described later. In addition, the MCU 141 controls the entire wireless device 100. Specifically, the MCU 141 performs a process of storing the output of the sensor unit 110 in the storage unit 130, a process of transmitting a signal including information related to the wireless device 100 via the transmission unit 120, a process of reading data from the storage unit 130, a switching control of the communication mode of the transmission unit 120 based on the output of the environment sensor 150, a display process on the display 160, and a switching of the wireless device 100 on and off by operating the switch 170.

[0043] The power circuit 142 is a circuit that converts power supplied from the power connector 180 or the battery 190 into a voltage value to be supplied to the MCU 141 and outputs the voltage to the MCU 141 .

[0044] The environment sensor 150 is, for example, a sensor that detects physical quantities of the environment such as humidity or air pressure. When flying by air transport, the humidity or air pressure decreases as the altitude increases, so by detecting physical quantities of the environment such as humidity or air pressure with the environment sensor, it can be determined whether air transport is being performed.

[0045] The display 160 is, for example, a liquid crystal display, and is connected to the MCU 141. The display 160 is controlled by the control unit 140 to display information related to the operating status of the wireless device 100. For example, the display 160 may display the communication mode of the transmission unit 120.

[0046] The switch 170 is a switch for switching the power of the wireless device 100 on and off, and is connected to the MCU 141 .

[0047] Power connector 180 is connected to power circuit 142 and is a connector for connecting a power cable that connects power circuit 142 to an external power supply of wireless device 100. Wireless device 100 includes battery 190, but by connecting the power cable to power connector 180, wireless device 100 can receive power from an external power supply.

[0048] The battery 190 is connected to the power supply circuit 142 and is a rechargeable secondary battery. When the wireless device 100 is not supplied with power from an external power supply via a power cable connected to the power supply connector 180 , the power of the battery 190 is used.

[0049] In addition, the sensor unit 110 may not include the acceleration sensor 111. In this case, the speed and acceleration can be detected based on the change in the position detected by the GNSS receiver 112. In addition, the sensor unit 110 may not include the GNSS receiver 112. In this case, the speed and position can be obtained based on the acceleration detected by the acceleration sensor 111.

[0050] Furthermore, the wireless device 100 may not include the environment sensor 150. In this case, the wireless device 100 may be capable of switching the communication mode of the transmitter 120 without using physical quantities of the environment. Furthermore, the wireless device 100 may not include the display 160.

[0051] <Flowchart>

[0052] Figure 5 This is a flowchart showing an example of processing executed by the MCU 141 .

[0053] After starting the operation, the MCU 141 performs measurement using the environment sensor 150 (step S1 ). The MCU 141 obtains physical quantities of the environment such as temperature, humidity, or air pressure detected by the environment sensor 150 .

[0054] The MCU 141 obtains the radio wave strength of the base station 30A via the LTE communication unit 121 (step S2 ).

[0055] The MCU 141 determines whether the radio wave strength of the base station 30A is higher than the threshold value (step S3). The process of step S3 is to determine whether the wireless device 100 is not being transported by air but is being transported by land or water. Therefore, the threshold value can be set as a maximum value that can be received by the wireless device 100 in the aircraft 10 in flight, for example.

[0056] If the MCU 141 determines that the radio wave strength of the base station 30A is higher than the threshold value (S3: Yes), the communication mode of the transmitter 120 is set to the low output mode (step S4). The low output mode is a communication mode in which the transmission output power of the transmitter 120 is set to a specified value of 100 mW or less. When the radio wave strength of the base station 30A is higher than the threshold value during land transportation or water transportation, the communication mode is set to the low output mode because sufficient communication with the base station 30A can be achieved through the low output mode.

[0057] MCU 141 causes transmission unit 120 to transmit a signal including information on wireless device 100 (step S5). Transmission unit 120 transmits a signal including displacement information indicating displacement of wireless device 100 using the transmission output power in the set communication mode.

[0058] The MCU 141 enters a sleep mode for a certain period of time (step S6 ). After completing the process of step S5 , the MCU 141 returns the flow to step S1 .

[0059] Furthermore, if the MCU 141 determines in step S3 that the radio wave strength of the base station 30A is not higher than the threshold value (S3: No), the MCU 141 reads the displacement history from the storage unit 130 and determines whether the displacement history of the wireless device 100 in the past 6 hours conforms to the movement and stop mode of land transportation or water transportation (step S7). That is, the MCU 141 determines whether the condition (1) is met. This is because even if the radio wave strength of the base station 30A is lower than the threshold value, it is determined whether the movement is land transportation or water transportation.

[0060] In order to determine whether the displacement history of the wireless device 100 in the past 6 hours conforms to the movement and stop mode of land transportation or water transportation, specifically, the data representing the change over time of the displacement when the displacement history of the wireless device 100 in the past 6 hours is the movement and stop mode of land transportation or water transportation can be compared with the data representing the change over time of the displacement represented by the displacement history.

[0061] If the MCU 141 determines that the displacement history of the wireless device 100 in the past 6 hours does not conform to the movement and stop pattern of land transportation or water transportation (S7: No), it determines whether the movement of less than 60 km / h has continued for more than 30 minutes (step S8). This is because even if the radio wave strength of the base station 30A is lower than the threshold, as long as the movement of less than 60 km / h continues for more than 30 minutes, it can be considered that the wireless device 100 is not in air transportation but is moving in land transportation or water transportation.

[0062] In order to determine whether the movement of less than 60 km / h has continued for more than 30 minutes, it can be determined by whether the displacement history read from the storage unit 130 includes a state in which the movement of less than 60 km / h has continued for more than 30 minutes up to the current time point. As an example, it can be determined whether the movement of less than 60 km / h has continued for more than 30 minutes by observing the maximum speed and the continuation of the movement state in all displacement histories obtained within the corresponding time read from the storage unit 130.

[0063] If the MCU 141 determines that the movement of less than 60 km / h has not continued for more than 30 minutes (S8: No), it determines whether it meets the requirements of land transportation or water transportation based on the displacement history of the past 15 minutes (step S9). This is because if the displacement history of the past 15 minutes meets the requirements of land transportation or water transportation, it can be considered that the wireless device 100 is not transported by air, but is moving in land transportation or water transportation. This is because, for example, if 5 minutes of movement and 1 minute of stop are repeated, even if the conditions of steps S7 and S8 are not met, it can be considered that it is moving in land transportation. In addition, even if the continuous movement is more than 60 km / h, it can be inferred that it is land transportation when the location information is along the path of the highway. In addition, with regard to water transportation, even if the conditions of steps S7 and S8 are not met, it is possible to be transported by water.

[0064] If the MCU141 determines that it does not meet the land transportation or water transportation based on the displacement history of the past 15 minutes (S9: No), the process proceeds to step S4. In this case, since it is determined that air transportation is being performed, the MCU141 sets the communication mode of the transmission unit 120 to the low output mode. Since air transportation is being performed, the transmission output power is set to a specified value of 100mW or less subject to restrictions related to air transportation. Determining that air transportation is being performed is synonymous with determining that the aircraft 10 is being carried.

[0065] Furthermore, if the MCU 141 determines in step S7 that the displacement history of the wireless device 100 in the past 6 hours conforms to the movement and stop pattern of land transportation or water transportation (S7: Yes), it determines whether the change of the data (environmental data) representing the physical quantity of the environment detected by the environmental sensor 150 is stable (step S10). As an example, whether the change of the environmental data is stable can be determined by whether the ratio of the change of the environmental data over time is less than a specified value. Step S10 is a process for determining whether land transportation is being performed or water transportation is being performed. Therefore, the specified value can be set as a maximum value of the ratio of the change of the environmental data over time that may occur in land transportation or water transportation. This is because the change of the environmental data over time in air transportation is greater than that in land transportation or water transportation.

[0066] If the MCU141 determines that the change in environmental data is stable (S10: Yes), it sets the communication mode of the sending unit 120 to the high output mode (step S11). The high output mode is a communication mode in which the transmission output power of the sending unit 120 is set to a specified value exceeding 100mW. Since it is determined that land transportation is being carried out or water transportation is being carried out, the transmission output power is set to a specified value exceeding 100mW that is not subject to restrictions related to air transportation. Determining that land transportation is being carried out or water transportation is being carried out is synonymous with determining that it is not carried on the aircraft 10. As an example, the specified value exceeding 100mW is the maximum transmission output power of LTE cat.M1 or NB-IoT, which is an LTE standard used by IoT devices, which is 23dBm (200mW).

[0067] When the MCU 141 completes the process of step S11, the flow proceeds to step S5. In step S5, the transmission unit 120 transmits a signal including displacement information indicating the displacement of the wireless device 100 at the transmission output power in the low output mode.

[0068] In addition, if the MCU141 determines in step S10 that the change of the environmental data is not stable (S10: No), the process proceeds to step S4. In this case, since it is determined that air transportation is being performed, the MCU141 sets the communication mode of the transmission unit 120 to the low output mode. The low output mode is a communication mode in which the transmission output power of the transmission unit 120 is set to a prescribed value of 100mW or less. Since it is determined that air transportation is being performed, the transmission output power is set to a prescribed value of 100mW or less subject to restrictions related to air transportation. Determining that air transportation is being performed is synonymous with determining that the aircraft 10 is carried.

[0069] In addition, if MCU141 determines in step S8 that the movement of less than 60 km / h has continued for more than 30 minutes (S8: Yes), it advances the process to step S10 to determine whether the change of the data representing the physical quantity of the environment detected by the environmental sensor 150 (environmental data) is stable (step S10).

[0070] If the MCU 141 determines in step S9 that the wireless device 100 has stopped for more than 15 minutes (S9: YES), the process proceeds to step S10 to determine whether the data representing the physical quantity of the environment detected by the environment sensor 150 (environmental data) changes smoothly (step S10).

[0071] in addition, Figure 5 The flowchart shown includes three steps, S7, S8, and S9, in order to determine whether the wireless device 100 is moving in land transportation or water transportation, but it is sufficient to include at least one of steps S7, S8, and S9. This is because it is possible to determine whether the wireless device 100 is moving in land transportation or water transportation by at least one of the steps. In addition, the determination of step 10 may be omitted, and the communication mode may be set to the high output mode (step S11) when any one of S7, S8, and S9 is determined to be "yes".

[0072] <Effect>

[0073] The wireless device 100 is a mobile wireless device 100, and includes: a sensor unit 110 for measuring the displacement of the wireless device 100; a transmission unit 120 for transmitting a signal including information related to the wireless device 100; a storage unit 130 for storing a predetermined displacement condition in advance and storing a displacement history measured by the sensor unit 110; and a control unit 140 for controlling a communication mode of the transmission unit 120 based on the predetermined displacement condition and the displacement history stored in the storage unit 130; the control unit 140 controls the communication mode of the transmission unit 120 to be either a low output mode in which the transmission output power of the signal of the transmission unit 120 is suppressed to be less than a predetermined value or a high output mode in which the transmission output power of the signal of the transmission unit 120 is greater than a predetermined value, and sets the communication mode of the transmission unit 120 to the high output mode when it is determined based on the predetermined displacement condition and the displacement history that the wireless device 100 is not on board an aircraft.

[0074] The wireless device 100 does not detect that the aircraft 10 is flying, but performs switching control based on the reverse concept of setting the communication mode to the high output mode when it is determined that the wireless device 100 is not on the aircraft 10. Therefore, the communication mode of the wireless device 100 is basically the low output mode, and is switched to the high output mode when it is determined that the wireless device 100 is not on the aircraft 10.

[0075] Therefore, it is possible to provide a wireless device 100 and a logistics tracking system 300 that can detect that the aircraft 10 is not flying and appropriately switch the communication mode. It is very difficult to appropriately detect that the aircraft 10 is flying, but it is relatively easy to detect that the wireless device 100 is not on the aircraft 10. Therefore, basically, the low output mode is set in advance, and when it is determined that the wireless device 100 is not on the aircraft 10, it is set to a high output mode, thereby enabling the communication mode to be appropriately switched. In addition, by detecting that the wireless device 100 is not on the aircraft 10, the following two aspects can be achieved, namely, ensuring communication stability and satisfying the restrictions when being on the aircraft.

[0076] Furthermore, since the predetermined displacement condition is a condition indicating the displacement of the wireless device 100 indicating that the wireless device 100 is moving in land transport or water transport, it is possible to determine whether the wireless device 100 is moving in land transport or water transport. The wireless device 100 is moving in land transport or water transport, which means that the wireless device 100 is not sailing in the aircraft 10. Therefore, by determining whether the wireless device 100 is moving in land transport or water transport, it is possible to provide the wireless device 100 and the logistics tracking system 300 that can detect that the aircraft 10 is not sailing and appropriately switch the communication mode.

[0077] Furthermore, the condition for indicating the displacement of the wireless device 100 indicating that the wireless device 100 is moving in land transport or water transport includes at least one of the following: (1) the displacement history of the wireless device 100 within a first predetermined time (for example, 6 hours) in the past is included in the moving and stopping mode of the land transport or water transport; (2) the state in which the moving speed of the wireless device 100 is less than the minimum speed of the flying aircraft (for example, 60 km / h) continues for more than a second predetermined time (for example, 30 minutes), or there is no displacement of the wireless device 100 for more than a third predetermined time (for example, 15 minutes).

[0078] Therefore, it is possible to more reliably determine whether the wireless device 100 is moving in land transportation or water transportation, and it is possible to provide the wireless device 100 and the logistics tracking system 300 that can detect that the aircraft 10 is not sailing and appropriately switch the communication mode.

[0079] Furthermore, when the radio wave strength of the base station 30A is high, the control unit 140 sets the communication mode of the transmission unit 120 to the low output mode. When the radio wave strength of the base station 30A is high during land transportation or water transportation, the low output mode enables sufficient communication with the base station 30A, and a state in which communication with the base station 30A is possible while suppressing power consumption. Furthermore, even when the radio wave strength of the base station 30A is high, no problem will occur in the high output mode as long as the wireless device 100 is in land transportation or water transportation. However, since it is conceivable that the wireless device 100 is carried in the aircraft 10 even when the radio wave strength of the base station 30A is high, it is preferable to set it to the low output mode in order to avoid risks.

[0080] Furthermore, since the sensor unit 110 is the acceleration sensor 111 or the GNSS receiver 112, it is possible to more reliably detect the acceleration, velocity, or position accompanying the movement of the wireless device 100. Therefore, by detecting that the aircraft 10 is not flying based on the acceleration, velocity, or position obtained by the acceleration sensor 111 or the GNSS receiver 112, it is possible to provide the wireless device 100 and the logistics tracking system 300 that can appropriately switch the communication mode.

[0081] Furthermore, when the transmission unit 120 is in the low output mode, the transmission output power of the signal of the transmission unit 120 is equal when the wireless device 100 is mounted on the aircraft and when the wireless device 100 is not mounted on the aircraft. Therefore, when the transmission unit 120 is in the low output mode, the signal including the information related to the wireless device 100 can be stably transmitted regardless of whether the wireless device 100 is mounted on the aircraft.

[0082] <Modification>

[0083] In the above, a method using a condition that indicates a displacement of the wireless device 100 indicating that the wireless device 100 is moving during land transportation or water transportation as a predetermined displacement condition to be compared with the displacement history has been described. More specifically, the above-mentioned conditions (1) to (3) are used. However, the predetermined displacement condition may be a stop condition that indicates that the wireless device 100 has stopped moving after the displacement indicating that the wireless device 100 has moved is measured by the sensor unit 110. In this case, if the control unit 140 determines that the wireless device 100 has stopped moving based on the stop condition and the displacement history, the communication mode of the transmission unit 120 may be switched from the low output mode to the high output mode.

[0084] As mentioned above, the wireless device and the logistics tracking system according to the exemplary embodiments of the present disclosure have been described, but the present disclosure is not limited to the specifically disclosed embodiments, and various modifications and changes can be made without departing from the scope of the claims.

[0085] In addition, the present international application claims priority based on Japanese Patent Application No. 2022-111370 filed on July 11, 2022, the entire contents of which are incorporated herein by reference.

[0086] Description of Reference Numerals

[0087] 10 Aircraft

[0088] 20 Trucks

[0089] 50 items

[0090] 100 wireless devices

[0091] 101 Shell

[0092] 110 Sensor Department

[0093] 111 Acceleration Sensor

[0094] 112GNSS receiver (an example of a position detection sensor)

[0095] 120 Sending Department

[0096] 130 Storage

[0097] 140 Control Department

[0098] 141MCU

[0099] 150 Environmental Sensors

[0100] 160 Display

[0101] 170 Switch

[0102] 180 power connector

[0103] 190 battery

[0104] 200 Server (an example of an information processing device)

[0105] 300 Logistics Tracking System

Claims

1. A wireless device, the wireless device being a mobile wireless device, characterized in that: have: A sensor unit for measuring a displacement of the wireless device; a transmitting unit configured to transmit a signal including information related to the wireless device; a storage unit that stores predetermined displacement conditions in advance and stores a displacement history measured by the sensor unit; and a control unit that controls a communication mode of the transmission unit based on the predetermined displacement condition and the displacement history stored in the storage unit; The control unit controls the communication mode of the transmission unit to be either a low output mode in which the transmission output power of the signal of the transmission unit is suppressed to below a specified value or a high output mode in which the transmission output power of the signal of the transmission unit is made larger than the specified value. If it is determined based on the specified displacement condition and the displacement history that the wireless device is not carried on the aircraft, the communication mode of the transmission unit is set to the high output mode.

2. The wireless device according to claim 1, wherein: The predetermined displacement condition is a condition indicating displacement of the wireless device, which indicates that the wireless device is moving during land transportation or water transportation.

3. The wireless device according to claim 2, wherein: The condition for indicating the displacement of the wireless device indicating that the wireless device is moving during land transportation or water transportation includes at least any one of the following: the displacement history of the wireless device within the first predetermined period of time in the past corresponds to a movement and stop pattern of land transportation or water transportation; The moving speed of the wireless device is lower than the minimum speed of the aircraft in flight for a period of time longer than a second predetermined time; or The above displacement history for more than the third specified time is consistent with land transportation or water transportation.

4. The wireless device according to claim 1, wherein: The control unit sets the communication mode of the transmission unit to the low output mode when the radio wave strength of the base station is high.

5. The wireless device according to any one of claims 1 to 4, wherein: The sensor unit is an acceleration sensor or a position detection sensor.

6. The wireless device according to claim 1, wherein: When the transmission unit is in the low output mode, the transmission output power of the signal of the transmission unit is equal when the wireless device is on board the aircraft and when the wireless device is not on board the aircraft.

7. The wireless device according to claim 1, wherein: The predetermined displacement condition is a stop condition in which the sensor unit measures a displacement indicating that the wireless device has stopped moving, after measuring a displacement indicating that the wireless device has moved. The control unit switches the communication mode of the transmission unit from the low output mode to the high output mode when determining that the wireless device has stopped moving based on the stop condition and the displacement history.

8. A logistics tracking system, characterized in that: include: The wireless device of claim 1; as well as The information processing device receives the signal sent by the wireless device and manages the location of the object on which the wireless device is installed.

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