Wireless communication system and wireless communication device

Abstract

To provide a wireless communication system which prevents unestablishment of the proper wireless connection due to contact with a living body.SOLUTION: Deep body temperature sensors 10(1), 10(2), transmit the measured deep body temperature in an advertising packet. A display unit 40 displays the measurement results of the deep body temperature. When the wireless connection with the display unit 40 is not established, the deep body temperature sensors 10(1), 10(2), transmit advertising packets containing the determination result of whether or not they are attached to the human body. The display unit 40 preferentially wirelessly connects the sensor attached to the human body among the deep body temperature sensors 10 (1), 10 (2).SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a wireless communication system and a wireless communication device. [Background technology]

[0002] For example, Patent Document 1 below describes a wireless communication system using Bluetooth (registered trademark). This wireless communication system includes a communication device and an information processing device. The information processing device includes a device that determines whether or not to connect to the communication device depending on whether or not the communication device is a stationary device, in addition to the radio wave intensity of the advertising information. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-198502 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, when the communication device is in contact with a living body, the radio wave strength of the advertising information in the information processing device is weaker than when the communication device is not in contact with the living body. Therefore, when determining whether or not to connect based on the radio wave strength, there is a risk that the communication device to be connected cannot be properly connected. [Means for solving the problem]

[0005] In order to solve the above problem, a wireless communication system includes a plurality of first wireless communication devices and a second wireless communication device, the first wireless communication device is capable of transmitting a status signal indicating a contact status with a living body, and the second wireless communication device is configured to perform a connection process and a priority process, the connection process being a process of wirelessly connecting to the first wireless communication device, and the priority process including a process of using the status signal as input and preferentially performing the connection process with the first wireless communication device that is in contact with the living body compared to the first wireless communication device that is not in contact with the living body.

[0006] In the above configuration, the second wireless communication device performs the connection process preferentially when the first wireless communication device is in contact with a living body compared to when the first wireless communication device is not in contact. This allows an appropriate wireless connection to the first wireless communication device in the following cases. The first case is when the first wireless communication device intends to wirelessly connect to the first wireless communication device when in contact with a living body. The second case is when it is determined whether or not to wirelessly connect to the first wireless communication device based on the distance ascertained from the reception strength of the wireless signal from the first wireless communication device. Effect of the Invention

[0007] A proper connection can be made to the first wireless communication device. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram illustrating a configuration of a wireless communication system according to the first embodiment. [Diagram 2] FIG. 2 is a flowchart showing the procedure of the process executed by the core body temperature sensor according to the embodiment. [Diagram 3] FIG. 3 is a flowchart showing detailed steps of a part of the process executed by the core body temperature sensor according to the embodiment. [Figure 4] FIG. 4 is a flowchart showing the procedure of a process executed by the display unit according to the embodiment. [Diagram 5] FIG. 5 is a time chart illustrating a sequence of a communication process according to the embodiment. [Figure 6] FIG. 6 is a flowchart showing a procedure of a process executed by a display unit according to the second embodiment. [Figure 7] FIG. 7 is a flowchart showing the procedure of the process executed by the core body temperature sensor according to the embodiment. [Figure 8] FIG. 8 is a flowchart showing the procedure of a process executed by the display unit according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] <First embodiment> Hereinafter, the first embodiment will be described with reference to the drawings. [System configuration] FIG. 1 shows a wireless communication system according to this embodiment.

[0010] The deep body temperature sensors 10(1), 10(2), ... shown in Figure 1 are sensors that detect a person's deep body temperature. The numbers in parentheses among the symbols given to the deep body temperature sensors 10(1), 10(2), ... indicate individual differences. In the following, when multiple deep body temperature sensors 10(1), 10(2), ... are collectively referred to as deep body temperature sensor 10.

[0011] The deep body temperature sensor 10 includes a temperature sensing unit 20 and a control device 30. The temperature sensing unit 20 includes a first temperature sensor 22, a second temperature sensor 24, and a thermal resistor 26. The first temperature sensor 22 and the second temperature sensor 24 may be, for example, a thermistor. The thermal resistor 26 is sandwiched between the first temperature sensor 22 and the second temperature sensor 24. The first temperature sensor 22 is disposed at a position closer to the human body than the second temperature sensor 24. Therefore, the second temperature sensor 24 faces the human body via the thermal resistor 26. Specifically, the deep body temperature sensor 10 is fixed, for example, to a predetermined location on the human body.

[0012] The control device 30 measures the deep body temperature of a person based on the first temperature T1 detected by the first temperature sensor 22 and the second temperature T2 detected by the second temperature sensor 24. The control device 30 includes a PU 32, a storage device 34, and a communication device 36. The PU 32 is a software processing device such as a CPU, a GPU, and a TPU. The storage device 34 may be a storage medium such as an electrically rewritable non-volatile memory and a disk medium. The PU 32 executes a program stored in the storage device 34 to perform a process of measuring the deep body temperature. The communication device 36 is a device for wireless communication with the display unit 40. In this embodiment, the Bluetooth (registered trademark) standard is adopted as a communication method used for communication between the deep body temperature sensor 10 and the display unit 40. In more detail, the Bluetooth Low Energy (BLE) standard is adopted.

[0013] The display unit 40 has a function of displaying the measurement result of the core body temperature transmitted from the core body temperature sensor 10. The display unit 40 includes a PU 42, a storage device 44, a communication device 46, and a display device 48. The PU 42 is a software processing device such as a CPU, a GPU, or a TPU. The storage device 44 may be a storage medium such as an electrically rewritable non-volatile memory or a disk medium. The PU 42 executes a process of displaying the measurement result by executing a program stored in the storage device 44.

[0014] [Processing for establishing wireless connection] The display unit 40 selectively establishes a wireless connection with one of the deep body temperature sensors 10(1), 10(2), .... Here, establishing a wireless connection means that the display unit 40 selectively performs bidirectional communication with one of the deep body temperature sensors 10(1), 10(2), .... During the period when one of the deep body temperature sensors 10(1), 10(2), ... is wirelessly connected to the display unit 40, no bidirectional communication is performed between the other sensors of the deep body temperature sensors 10(1), 10(2), ... and the display unit 40.

[0015] Furthermore, the control for selectively establishing a wireless connection is intended to set the connection target as follows. That is, the connection target is the sensor among the deep body temperature sensors 10(1), 10(2), ... that is actually measuring the deep body temperature of a person. Furthermore, when there are multiple sensors among the deep body temperature sensors 10(1), 10(2), ... that are actually measuring the deep body temperature of a person, the connection target is the sensor that is closest to the display unit 40. This will be described below with reference to Figs. 2 to 5.

[0016] Fig. 2 shows the procedure of the process executed by the core body temperature sensor 10 as a peripheral. The process shown in Fig. 2 is realized by the PU 32 repeatedly executing a program stored in the storage device 34, for example, at a predetermined interval. Fig. 3 shows a detailed procedure of a part of the process shown in Fig. 2. In the following, the step number of each process is represented by a number preceded by "S".

[0017] On the other hand, Fig. 4 shows the procedure of the process executed by the display unit 40 as a central unit. The process shown in Fig. 4 is realized by the PU 42 repeatedly executing a program stored in the storage device 44, for example, at a predetermined interval.

[0018] Fig. 5 illustrates a communication sequence realized by the processing in Fig. 2 to Fig. 4. Among the processing in Fig. 2 and Fig. 4, the processing corresponding to the sequence shown in Fig. 5 is indicated by symbols "seq1" to "seq5". Below, the processing shown in Fig. 2 to Fig. 4 will be explained in chronological order until a wireless connection is established.

[0019] 2, the PU 32 of the deep body temperature sensor 10 first acquires the first temperature T1 detected by the first temperature sensor 22 and the second temperature T2 detected by the second temperature sensor 24 (S10). Next, the PU 32 determines whether or not a wireless connection with the display unit 40 has been established, in other words, whether or not the deep body temperature sensor 10 is in a connected state with the display unit 40 (S12). If the PU 32 determines that a wireless connection has not yet been established (S12: NO), it executes a process of determining whether or not the deep body temperature sensor 10 is in a state of being attached to the human body (S14).

[0020] FIG. 3 shows the detailed procedure of the process of S14. In the series of processes shown in FIG. 3, the PU 32 judges whether the status flag F is "1" or not (S40). When the status flag F is "1", it indicates that the deep body temperature sensor 10 is attached to the human body. On the other hand, when the status flag F is "0", it indicates that the deep body temperature sensor 10 is not attached to the human body. When the PU 32 judges that the status flag F is "0" (S40: NO), it judges whether the value obtained by subtracting the second temperature T2 from the first temperature T1 is equal to or greater than the threshold value ΔT (S42). When the PU 32 judges that the value is equal to or greater than the threshold value ΔT (S42: YES), it increments the counter C by "1" (S44). The counter C is a counter for measuring the duration during which the subtracted value is equal to or greater than the threshold value ΔT. Next, the PU 32 judges whether the counter C is equal to or greater than the threshold value Cth (S46). This process is a process for judging whether the deep body temperature sensor 10 is attached to the human body. That is, when the core body temperature sensor 10 is attached to the human body, the first temperature T1 is the temperature at a position closer to the human body than the second temperature T2. In particular, the second temperature T2 is the temperature of the thermal resistor 26 to which heat from the human body is transferred. Here, the heat from the human body decreases as it travels from the first temperature sensor 22 to the second temperature sensor 24. Therefore, the second temperature T2 is lower than the first temperature T1. The threshold value Cth is set to a value for suppressing erroneous determination due to noise.

[0021] When the PU 32 determines that the counter C is equal to or greater than the threshold value Cth (S46: YES), it determines that the core body temperature sensor 10 is attached to the human body, and assigns "1" to the state flag F (S48). On the other hand, when the PU 32 determines that the core body temperature sensor 10 is less than the threshold value ΔT (S42: NO), it initializes the counter C (S50).

[0022] Furthermore, when the PU 32 determines that the status flag F is "1" (S40: YES), it determines whether or not the value obtained by subtracting the second temperature T2 from the first temperature T1 is less than the threshold value ΔT (S52). When the PU 32 determines that the subtracted value is less than the threshold value ΔT (S52: YES), it determines that the core body temperature sensor 10 is not attached to the human body, and assigns "0" to the status flag F (S54).

[0023] When the PU 32 completes the processes of S48, S50, and S54, or when a negative determination is made in the processes of S46 and S52, the PU 32 completes the process of S14 shown in FIG. Returning to Fig. 2, the PU 32 updates the advertising packet in accordance with the determination result of S14 (S16). That is, the advertising packet includes data related to the determination result of S14. The process of S16 includes a process of updating the data related to the determination result of S14 to be included in the advertising packet to the latest data.

[0024] Next, the PU 32 transmits an advertising packet by operating the communication device 36 (S18). The data transmitted by the process of S18 includes data identifying the deep body temperature sensor 10. That is, for example, if the execution subject of the process of S18 is the PU 32 of the deep body temperature sensor 10(1), data identifying the deep body temperature sensor 10(1) is included. This process is for notifying the display unit 40 as the central that the deep body temperature sensor 10(1) can be wirelessly connected to the display unit 40.

[0025] On the other hand, as shown in FIG. 4, the PU42 of the display unit 40 judges whether or not it is connected to any of the multiple core body temperature sensors 10(1), 10(2), ... (S60). If the PU42 judges that a wireless connection has not been established with any of the multiple core body temperature sensors 10(1), 10(2), ... (S60: NO), it executes a passive scan to receive advertising signals from the surrounding core body temperature sensors 10 (S62). This causes the advertising packet transmitted by the process of S18 to be received. Note that in FIG. 5, "seq1" is written in the sequence related to the processes of S18 and S62.

[0026] Next, the PU42 detects the reception strength RSSI, which is the strength of the received advertising signal (S64). This may be performed by including data for detecting the reception strength RSSI in the advertising packet. Next, the PU42 extracts the determination result from the advertising packet (S66). Then, the PU42 determines whether or not the extracted determination result is a determination result that indicates that the device is attached to the human body (S68). When the PU42 determines that the determination result is a state that the device is attached to the human body (S68: YES), it assigns a value obtained by increasing and correcting the reception strength RSSI to the determined strength (S70).

[0027] The processing of S70 aims to achieve the following (a) and (b): (a) Compensating for the fact that the reception strength RSSI is smaller when the deep body temperature sensor 10 is attached to the human body than when it is not attached. That is, the human body contains a certain amount of moisture. The frequency band of the radio waves used in the wireless communication in this embodiment is easily absorbed by moisture. This frequency band is, for example, the "2.4 GHz band." Therefore, even if the distance from the display unit 40 is the same, when the deep body temperature sensor 10 is attached to the human body, the reception strength RSSI is more likely to decrease than when it is not attached.

[0028] (b) The deep body temperature sensor 10 attached to the human body is preferentially wirelessly connected to the display unit 40. As described above, in this embodiment, it is intended that the deep body temperature sensor 10 attached to the human body is the target for connection with the display unit 40. Therefore, in order to increase the possibility of being selected by the process of S74 described below, the determination strength is made large relative to the reception strength RSSI.

[0029] On the other hand, if the determination result indicates that the core body temperature sensor 10 is not attached to the human body (S68: NO), the PU 42 substitutes the reception strength RSSI for the determined strength (S71). When completing the processes of S70 and S71, the PU 42 determines whether the determination strength is equal to or greater than a predetermined value (S72). This process is for removing from the connection targets any deep body temperature sensor 10 that is too far away from the display unit 40. Note that the processes of S64 to S72 are executed for all sensors that were able to receive the advertising signal by the process of S62 out of the multiple deep body temperature sensors 10(1), 10(2), ...

[0030] If the PU72 determines that the determination strength for at least one of the multiple deep body temperature sensors 10(1), 10(2), ... is equal to or greater than a predetermined value (S72: YES), it selects the deep body temperature sensor 10 with the highest determination strength (S74). Note that if there is no deep body temperature sensor 10 with a determination strength equal to or greater than the predetermined value, the series of processes shown in FIG. 4 is temporarily terminated, as indicated by the dashed line in FIG. 4.

[0031] For ease of explanation, the core body temperature sensor 10 with the highest determination strength is referred to as the core body temperature sensor 10(1) below. Next, the PU 42 operates the communicator 46 to send a scan request to the selected core body temperature sensor 10(1) to transition to the active scan mode (S76).

[0032] In response to this, as shown in Fig. 2, the PU 32 of the core body temperature sensor 10(1) determines whether or not there is a scan request (S20). In Fig. 5, the sequence corresponding to the processes of S76 and S20 is marked "seq2." If the PU 32 determines that there is a scan request (S20: YES), it responds to the scan response (S22). That is, the PU 32 transmits a "Scan Response" by operating the communicator 36.

[0033] In response to this, the PU 42 of the display unit 40 receives a "Scan Response" (S78) as shown in Fig. 4. Note that in Fig. 5, the sequence corresponding to the processes of S22 and S78 is indicated as "seq3."

[0034] Returning to Fig. 4, the PU 42 issues a connection request to the core body temperature sensor 10(1) by operating the communication device 46 (S80). In response, as shown in Fig. 2, the PU 32 of the core body temperature sensor 10(1) receives the connection request (S24). Note that in Fig. 5, "seq4" is written in the sequence corresponding to the processing of S80 and S24.

[0035] Returning to FIG. 2, the PU 32 establishes a wireless connection with the display unit 40 (S26). When the process of S26 is completed or when the process of S12 is judged to be positive, the PU 32 measures the core body temperature (S28). The PU 32 then operates the communicator 36 to transmit the measurement data of the core body temperature to the display unit 40 (S30). When the process of S30 is completed or when the process of S20 is judged to be negative, the PU 32 temporarily ends the series of processes shown in FIG. 2.

[0036] In response to this, the PU 42 of the display unit 40 receives the measurement data (FIG. 4: S82). In addition, in FIG. 5, "seq5" is written in the sequence corresponding to the processing of S30 and S82. When the PU 42 completes the processing of S82 or when the processing of S60 and S72 is negatively determined, the PU 42 temporarily ends the series of processing shown in FIG. 4.

[0037] Incidentally, after the processes of S80 and S26, the PU32 and PU42 execute some processes shown in FIG. 5 before transmitting and receiving measurement data. "Actions and Effects of the Present Embodiment" When the power is turned on, the PU32 of the core body temperature sensor 10 judges whether it is attached to the human body or not. Then, after including the judgment result in an advertising packet, it notifies the display unit 40 of its presence by transmitting an advertising signal.

[0038] When wireless communication is not established with any of the multiple deep body temperature sensors 10(1), 10(2), ..., the PU42 of the display unit 40 determines that it is in a receiving state of an advertising signal. Then, the PU42 calculates the receiving strength RSSI of the received advertising signal. The PU42 also extracts the determination result of whether the deep body temperature sensor 10 is attached to the human body from the data included in the advertising signal. Then, the PU42 increases and corrects the receiving strength RSSI of the advertising signal received from the deep body temperature sensor 10 attached to the human body to determine the determination strength. The PU42 establishes wireless communication with the deep body temperature sensor 10 with the maximum determination strength among the deep body temperature sensors 10 from which the advertising signal has been received.

[0039] Here, the deep body temperature sensor 10 attached to the human body is desired to be wirelessly connected to the display unit 40 in order to display the measurement result of the deep body temperature on the display unit 40. Meanwhile, most of the human body is water. And the radio waves in the frequency band used for communication between the deep body temperature sensor 10 and the display unit 40 are easily weakened by water. Therefore, even if the distance from the display unit 40 is the same, when the deep body temperature sensor 10 is attached to the human body, the reception strength RSSI is more likely to be weakened than when it is not attached. Therefore, there is a concern that the deep body temperature sensor 10, which is desired to be wirelessly connected to the display unit 40, may not be determined to be the connection target based only on the magnitude of the reception strength RSSI.

[0040] In contrast, by using a determination strength obtained by increasing and correcting the reception strength RSSI as described above, the influence of a decrease in reception strength RSSI caused by being attached to the human body is suppressed in determining whether or not a connection target is to be established.

[0041] Furthermore, the above setting (b) means the following. That is, even if the deep body temperature sensor 10 attached to the human body is farther from the display unit 40 by a certain amount than the deep body temperature sensor 10 not attached to the human body, the judgment strength of the sensor attached to the human body is greater. This allows the deep body temperature sensor 10 attached to the human body to be preferentially selected as the target for connection to the display unit 40.

[0042] According to the present embodiment described above, the following actions and effects can be obtained. (1-1) The PU42 of the display unit 40 sets the deep body temperature sensor 10 as a candidate for connection on the condition that the determination strength according to the signal transmitted by the deep body temperature sensor 10 is equal to or greater than a predetermined value. This makes it possible to prevent a deep body temperature sensor 10 located too far from being set as a candidate for connection. Furthermore, when the deep body temperature sensor 10 is attached to the human body, the PU42 increases the determination strength relative to the reception strength RSSI. Therefore, with regard to the condition that the reception strength RSSI is equal to or greater than a predetermined strength, which is a condition for setting the sensor as a candidate for connection, the predetermined strength when the deep body temperature sensor 10 is attached to the human body is smaller than when the sensor is not attached. Therefore, even if the reception strength RSSI becomes smaller in relation to the distance from the display unit 40 due to the deep body temperature sensor 10 being attached to the human body, it is easy to set the sensor as a candidate for connection.

[0043] (1-2) A signal containing data on the determination result of whether or not the deep body temperature sensor 10 is attached to the human body in an advertising packet is transmitted from the deep body temperature sensor 10 to the display unit 40. This allows the display unit 40 to quickly determine whether or not the deep body temperature sensor 10 is attached to the human body.

[0044] (1-3) The PU 32 of the deep body temperature sensor 10 determines whether or not it is attached to the human body by inputting the first temperature T1 and the second temperature T2. The second temperature sensor 24 that outputs the second temperature T2 is a sensor that faces the human body via the thermal resistor 26. Therefore, when the deep body temperature sensor 10 is attached to the human body, the second temperature T2 and the first temperature T1 tend to differ. On the other hand, when the deep body temperature sensor 10 is not attached to the human body, both the first temperature T1 and the second temperature T2 tend to be close to the outside air temperature. Therefore, by using the first temperature T1 and the second temperature T2, it is possible to determine with high accuracy whether or not it is attached to the human body.

[0045] <Second embodiment> The second embodiment will be described below with reference to the drawings, focusing on the differences from the first embodiment.

[0046] In the first embodiment, the PU 42 determines the connection target with the display unit 40 according to the determination strength that has a positive correlation with the reception strength RSSI. In contrast, in the present embodiment, the deep body temperature sensor 10 that is not attached to the human body is excluded from the connection target candidates.

[0047] Fig. 6 shows the procedure of the process executed by the PU 42 of the display unit 40. In Fig. 6, the processes corresponding to those shown in Fig. 4 are given the same step numbers and their explanations are omitted for convenience.

[0048] In the series of processes shown in FIG. 6, when the PU 42 determines that the core body temperature sensor 10 is not attached to the human body (S68: NO), the PU 42 temporarily ends the series of processes shown in FIG. 6 to remove the core body temperature sensor 10 from candidates for connection.

[0049] On the other hand, if the PU 42 determines that the sensor is attached to the human body (S68: YES), it determines whether the reception strength RSSI is equal to or greater than a predetermined value (S72a). If the PU 42 determines that the reception strength RSSI is equal to or greater than the predetermined value (S72a: YES), it selects the deep body temperature sensor 10 with the largest reception strength RSSI (S74a). If there is no deep body temperature sensor 10 with a reception strength RSSI equal to or greater than the predetermined value, the series of processes shown in FIG. 6 is temporarily terminated, as indicated by the dashed line in FIG. 6.

[0050] On the other hand, if the PU 42 selects the maximum core body temperature sensor 10, it executes the process from S76 onwards. If the PU 42 determines that the reception strength RSSI is less than the predetermined value (S72a: NO), it temporarily ends the series of processes shown in FIG.

[0051] According to the present embodiment described above, in addition to the effects (1-2) and (1-3) of the first embodiment, the following advantageous effects can be obtained. (2-1) The PU 42 of the display unit 40 excludes the deep body temperature sensors 10 that are not attached to the human body from the candidates for connection. This makes it possible to limit the sensors to be connected to the display unit 40 to those sensors that measure deep body temperature among the deep body temperature sensors 10(1), 10(2), ...

[0052] <Third embodiment> The third embodiment will be described below with reference to the drawings, focusing on the differences from the first embodiment.

[0053] In the first embodiment, the PU 32 of the core body temperature sensor 10 executes the process shown in Fig. 3. In contrast to this, in this embodiment, the PU 42 of the display unit 40 executes the process shown in Fig. 3.

[0054] Fig. 7 shows the procedure of the process executed by the PU 32 of the core body temperature sensor 10 according to this embodiment. The process shown in Fig. 7 is realized by the PU 32 repeatedly executing a program stored in the storage device 34, for example, at a predetermined interval. Note that the same step numbers are given to the processes in Fig. 7 that correspond to those shown in Fig. 2, and the description thereof will be omitted.

[0055] 7, first, when the PU 32 makes a negative determination in the process of S12, the PU 32 updates the first temperature T1 and the second temperature T2 in the advertising packet to the values ​​acquired in the process of S10 (S16a). That is, in this embodiment, the PU 32 includes the first temperature T1 and the second temperature T2 in the advertising packet instead of the determination result in the process of FIG.

[0056] When the PU 32 completes the process of S16a, the PU 32 proceeds to the process of S18. Fig. 8 shows the procedure of the process executed by the PU 42 of the display unit 40 according to the present embodiment. The process shown in Fig. 8 is realized by the PU 42 repeatedly executing a program stored in the storage device 44, for example, at a predetermined interval. Note that the same step numbers are given to the processes in Fig. 8 that correspond to the processes shown in Fig. 4, and the description thereof will be omitted.

[0057] In the series of processes shown in Fig. 8, the PU 42 executes a process of extracting the first temperature T1 and the second temperature T2 from the advertising packet (S66a) instead of the process of S66 in Fig. 4. Then, the PU 42 executes the process of S14 in Fig. 2, and then proceeds to the process of S68.

[0058] According to the present embodiment described above, in addition to the effects (1-1) and (1-3) of the first embodiment, the following advantageous effects can be obtained. (3-1) The PU 42 of the display unit 40 judges whether or not it is attached to the human body. This reduces the calculation load of the deep body temperature sensor 10 compared to when the PU 32 of the deep body temperature sensor 10 judges the same.

[0059] <Corresponding relationship> The correspondence between the items in the above embodiment and the items described in the "Notes" column below is as follows. In the following, the correspondence is shown for each number of the solution means described in the "Notes" column. [1] The first wireless communication device corresponds to the deep body temperature sensor 10. The second wireless communication device corresponds to the display unit 40. The connection process corresponds to the process of S80. The priority process corresponds to the processes of S68 and S70 in FIG. 4 and FIG. 8, and not executing the processes of S72a and after when a negative judgment is made in S68 in FIG. 6. "Having a plurality of first wireless communication devices" corresponds to the existence of a plurality of deep body temperature sensors 10 that can be the target of wireless connection with the display unit 40 in FIG. 1. [2] The strength detection process corresponds to the process of S64. The selection process corresponds to the process of S74. The reception strength corresponds to the reception strength RSSI detected by the process of S64. When the process of S70 is performed, the determined strength is greater than the reception strength, while when the process of S70 is not performed, the reception strength and the determined strength match. Therefore, the relative magnitude of the judgment strength to the reception strength is larger when the process of S70 is performed. [3] Corresponds to not executing the processes of S72a and after when the judgment is negative in S68 of FIG. 6. [4,5] The strength detection process corresponds to the process of S64. The strength judgment process corresponds to the process of S72 of FIG. 4 and FIG. 8 and the process of S72a of FIG. 6. In FIG. 4 and FIG. 8, the predetermined strength corresponds to the predetermined value in the process of S72 when the device is not in the attached state. In FIG. 4 and FIG. 8, the predetermined strength corresponds to the value obtained by subtracting the increase correction amount in the process of S70 from the predetermined value in the process of S72 when the device is in the attached state. [6] The contact judgment process corresponds to the process shown in FIG. 3. The sensor corresponds to the temperature sensing unit 20. [7] Corresponds to the process of FIG. 7 and FIG. 8. The state signal corresponds to a signal indicating an advertising packet including the first temperature T1 and the second temperature T2. The sensor corresponds to the temperature sensing unit 20. [8] The first temperature sensor, the second temperature sensor, and the thermal resistor correspond to the first temperature sensor 22, the second temperature sensor 24, and the thermal resistor 26, respectively. [9] The wireless communication device corresponds to the core body temperature sensor 10.

[10] The wireless communication device corresponds to the display unit 40. The reception process corresponds to the process of S62.The priority process corresponds to the processes of S68 and S70 in FIGS. 4 and 8, and to not executing the processes of S72a and onward when a negative determination is made in S68 in FIG.

[0060] <Other embodiments> This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that no technical contradiction occurs.

[0061] "About status signals" The status signal that allows the display unit 40 to grasp the presence or absence of contact with a living body without determining the presence or absence of contact with a living body is not limited to a signal in which the advertising packet contains data indicating the judgment result of the process of S14. For example, if the process of measuring the deep body temperature is executed only when the deep body temperature sensor 10 is in contact with a living body, the following signal may be the status signal. That is, the status signal may be a signal in which the advertising packet contains data indicating either the deep body temperature at each time or a fact that the deep body temperature cannot be measured.

[0062] 7, data indicating the first temperature T1 and the second temperature T2 are included in the advertising packet, but this is not limited to the above. For example, data indicating the difference between the first temperature T1 and the second temperature T2 may be included in the advertising packet.

[0063] "About priority processing" The process of changing the relative magnitude of the judgment strength with respect to the reception strength according to the presence or absence of a contact state is not limited to the processes of S68 to S71. For example, a value obtained by correcting the reception strength RSSI to a lower value may be substituted for the judgment strength in the process of S71, while the reception strength RSSI may be substituted for the judgment strength in the process of S70. Also, for example, a value obtained by correcting the reception strength RSSI to a lower value may be substituted for the judgment strength in the process of S71, while a value obtained by correcting the reception strength RSSI to an increased value may be substituted for the judgment strength in the process of S70.

[0064] The process of changing the relative magnitude of the judgment strength with respect to the reception strength depending on the presence or absence of a contact state is not limited to the process of changing the relative magnitude as in the above embodiment. For example, instead of the process of S70, a process of increasing and correcting the reception strength RSSI may be executed so that the judgment strength is the same regardless of whether or not there is contact with the living body when the distance is the same.

[0065] "Strength Judgment Process" Instead of the process of S72, a process of comparing the reception strength RSSI with a threshold value may be adopted. In this case, the threshold value in the case of a contact state is set to a value smaller than the threshold value in the case of a non-contact state. In this case, the threshold value indicates a predetermined strength.

[0066] It is not essential to provide a process for determining whether the reception strength RSSI is equal to or greater than a predetermined strength. "About the collision detection process" For example, as described in the "Sensor" section below, if the sensor that detects the state of the living body is a sensor that measures heart rate, the contact state may be determined when the measured heart rate is within the range of the living body's possible heart rate. Also, as described in the "Sensor" section below, if the sensor that detects the state of the living body is a pulse oximeter, the contact state may be determined when the measured oxygen concentration is within the range of the living body's possible heart rate. Also, as described in the "Sensor" section below, if the sensor that detects the state of the living body is a sensor that detects two or more living body conditions, the presence or absence of contact with the living body may be determined based on the measurement results of those two or more living body conditions.

[0067] "About living organisms" The living body is not limited to a human body. For example, it may be the body of a laboratory mouse. "About the deep body temperature sensor" The deep body temperature sensor is not limited to the sensor having the temperature sensing unit 20 shown in FIG.

[0068] "About sensors" The sensor for detecting the state of a living body is not limited to a deep body temperature sensor. For example, it may be a sensor that measures a heart rate. It may also be a pulse oximeter. It is not essential that the sensor for detecting the state of a living body is a sensor that detects one type of living body state. For example, it may be a sensor that detects two or more living body states, such as a deep body temperature sensor and a sensor that measures a heart rate.

[0069] "Regarding the first wireless communication device" It is not essential that the first wireless communication device has a sensor. For example, it may have a storage device that stores personal information of the user. In that case, if a wireless connection with the first wireless communication device is established in order to know the personal information of the user, for example, it is effective to give priority to wireless connection when in contact with a living body.

[0070] The first wireless communication device is not limited to a device that executes software processing. For example, it may include a dedicated hardware circuit such as an ASIC that executes at least a part of the processing executed in the above embodiment. That is, the first wireless communication device may include a processing circuit having any of the following configurations (a) to (c). (a) A processing circuit including a processing device that executes all of the above processing according to a program, and a program storage device such as a storage device that stores the program. (b) A processing circuit including a processing device and a program storage device that executes part of the above processing according to a program, and a dedicated hardware circuit that executes the remaining processing. (c) A processing circuit including a dedicated hardware circuit that executes all of the above processing. Here, there may be a plurality of software execution devices including a processing device and a program storage device. Also, there may be a plurality of dedicated hardware circuits.

[0071] "Regarding the second wireless communication device" The second wireless communication device is not limited to a device that executes software processing. For example, it may include a dedicated hardware circuit such as an ASIC that executes at least a part of the processing executed in the above embodiment. That is, the second wireless communication device may include a processing circuit having any of the following configurations (a) to (c). (a) A processing circuit including a processing device that executes all of the above processing according to a program, and a program storage device such as a storage device that stores the program. (b) A processing circuit including a processing device and a program storage device that executes part of the above processing according to a program, and a dedicated hardware circuit that executes the remaining processing. (c) A processing circuit including a dedicated hardware circuit that executes all of the above processing. Here, there may be a plurality of software execution devices including a processing device and a program storage device. Also, there may be a plurality of dedicated hardware circuits.

[0072] "About Wireless Communication Systems" It is not essential that the wireless communication system has multiple core body temperature sensors 10. Even if only a single core body temperature sensor 10 is provided, for example, when the PU42 executes the process of S72, it is effective to execute the processes of S68 to S71. In this case, the PU42 determines whether to perform the connection process depending on whether the determination strength is equal to or greater than a predetermined value. That is, when the determination strength is less than the predetermined value, the PU42 does not perform the connection process. When the determination strength is equal to or greater than a predetermined value, the PU42 performs the connection process. Here, according to the processes of S70 and S72, the determination strength when in contact with a living body is greater than the determination strength when not in contact with a living body.

[0073] "Others" -The communication method is not limited to BLE. <Additional Notes> The technical ideas that can be derived from the above-described embodiment and modifications will be described below.

[0074] 1. A wireless communication system comprising a plurality of first wireless communication devices and a second wireless communication device, the first wireless communication devices being capable of transmitting a status signal indicating a contact status with a living body, and the second wireless communication devices being configured to perform a connection process and a priority process, the connection process being a process of wirelessly connecting to the first wireless communication devices, and the priority process including a process of using the status signal as input and preferentially performing the connection process with the first wireless communication device that is in contact with the living body compared to the first wireless communication device that is not in contact with the living body.

[0075] 2. The second wireless communication device is configured to perform a strength detection process and a selection process, wherein the strength detection process is a process of detecting the receiving strength of a signal transmitted from the first wireless communication device, the selection process is a process of selecting to start communication with a device among the multiple first wireless communication devices having the largest corresponding judgment strength, the judgment strength being a variable having a positive correlation with the receiving strength, and the priority process is a process of making the relative magnitude of the judgment strength to the receiving strength of a signal transmitted from the first wireless communication device in contact with the living body greater than the relative magnitude of the judgment strength to the receiving strength of a signal transmitted from the first wireless communication device that is not in contact with the living body.

[0076] 3. The wireless communication system according to claim 1, wherein the priority process includes a process of not establishing a wireless connection when the first wireless communication device is not in contact with the living body. 4. The second wireless communication device is configured to execute a strength detection process and a strength determination process, the strength detection process being a process of detecting the reception strength of a signal transmitted from the first wireless communication device, the strength determination process being a process of determining whether the reception strength is equal to or greater than a predetermined strength, the connection process being a process of wirelessly connecting to the first wireless communication device on the condition that the reception strength is equal to or greater than the predetermined strength, and the priority process being a process of making the predetermined strength when in contact with the living body smaller than the predetermined strength when not in contact with the living body, which is the wireless communication system described in any one of 1 to 3 above.

[0077] 5. A wireless communication system comprising a first wireless communication device and a second wireless communication device, the first wireless communication device capable of transmitting a status signal indicating a contact status with a living body, and the second wireless communication device configured to execute a strength detection process, a strength determination process, and a priority process, the strength detection process being a process of detecting the reception strength of a signal transmitted from the first wireless communication device, the strength determination process being a process of determining whether the reception strength is greater than or equal to a predetermined strength, the connection process being a process of wirelessly connecting to the first wireless communication device on the condition that the reception strength is greater than or equal to the predetermined strength, and the priority process including a process of making the predetermined strength when in contact with the living body smaller than the predetermined strength when not in contact with the living body.

[0078] 6. A wireless communication system described in any one of 1 to 5 above, wherein the first wireless communication device is configured to execute a contact determination process that determines whether or not contact is occurring with the living body using a detection value of a sensor that senses the state of the living body as input, and the state signal is a signal that indicates the determination result by the contact determination process.

[0079] 7. The wireless communication system described in any one of 1 to 5 above, wherein the first wireless communication device is capable of executing a status signal transmission process that transmits the status signal, and the second wireless communication device is configured to execute a contact determination process using the status signal as input to determine whether or not contact is being made with the living body, and the status signal transmission process is a process of transmitting the status signal using a detection value of a sensor that senses the status of the living body as input.

[0080] 8. A wireless communication system as described in 6 or 7 above, wherein the sensor comprises a first temperature sensor, a second temperature sensor, and a thermal resistor, the first temperature sensor being positioned closer to the living body than the second temperature sensor, and the second temperature sensor being a sensor facing the first temperature sensor via the thermal resistor.

[0081] 9. A wireless communication device capable of transmitting a status signal to an external wireless communication device, the status signal being a signal indicating the presence or absence of contact with a living body. 10. A wireless communication device configured to perform a reception process, a connection process, and a priority process, wherein the reception process is a process of receiving a signal transmitted by an external wireless communication device when a wireless connection with the external wireless communication device has not been established, the transmitted signal including a status signal, the status signal being a signal indicating whether or not the external wireless communication device is in contact with a living body, the connection process is a process of wirelessly connecting to the external wireless communication device, and the priority process includes a process of using the status signal as input and preferentially executing the connection process when the external wireless communication device is in contact with the living body rather than when it is not in contact. [Explanation of symbols]

[0082] 10…Core body temperature sensor 20...Temperature sensing part 22…First temperature sensor 24…Second temperature sensor 26...Thermal resistor 30...Control device 34…Storage device 36…Communication device 40...Display unit 44…Storage device 46…Communication device 48...Display device

Claims

1. A plurality of first wireless communication devices and a second wireless communication device are provided, the first wireless communication device is capable of transmitting a status signal indicating a contact status with a living body; the second wireless communication device is configured to perform a connection process and a priority process; the connection process is a process of wirelessly connecting to the first wireless communication device, the priority process includes a process of using the status signal as an input and preferentially executing the connection process with the first wireless communication device in contact with the living body, compared with the first wireless communication device not in contact with the living body; the second wireless communication device is configured to perform a strength detection process and a selection process; the strength detection process is a process of detecting a reception strength of a signal transmitted from the first wireless communication device, the selection process is a process of selecting, from among the plurality of first wireless communication devices, a device having a maximum corresponding determination strength to start communication with the first wireless communication device; The determination strength is a variable having a positive correlation with the reception strength, A wireless communication system in which the priority processing includes processing for making the relative magnitude of the judgment strength with respect to the receiving strength of a signal transmitted from the first wireless communication device in contact with the living body greater than the relative magnitude of the judgment strength with respect to the receiving strength of a signal transmitted from the first wireless communication device that is not in contact with the living body.

2. A plurality of first wireless communication devices and a second wireless communication device are provided, the first wireless communication device is capable of transmitting a status signal indicating a contact status with a living body; the second wireless communication device is configured to perform a connection process and a priority process; the connection process is a process of wirelessly connecting to the first wireless communication device, the priority process includes a process of using the status signal as an input and preferentially executing the connection process with the first wireless communication device in contact with the living body, compared with the first wireless communication device not in contact with the living body; The second wireless communication device is configured to perform a strength detection process and a strength determination process; the strength detection process is a process of detecting a reception strength of a signal transmitted from the first wireless communication device, the strength determination process is a process of determining whether the reception strength is equal to or greater than a predetermined strength, the connection process is a process of wirelessly connecting to the first wireless communication device on condition that the reception strength is equal to or greater than the predetermined strength, A wireless communication system, wherein the priority process includes a process of making the predetermined intensity when in contact with the living body smaller than the predetermined intensity when not in contact with the living body.

3. A plurality of first wireless communication devices and a second wireless communication device are provided, the first wireless communication device is capable of transmitting a status signal indicating a contact status with a living body; the second wireless communication device is configured to perform a connection process and a priority process; the connection process is a process of wirelessly connecting to the first wireless communication device, the priority process includes a process of using the status signal as an input and preferentially executing the connection process with the first wireless communication device in contact with the living body, compared with the first wireless communication device not in contact with the living body; the first wireless communication device is capable of executing a status signal transmission process for transmitting the status signal; the second wireless communication device is configured to execute a contact determination process for determining whether or not the second wireless communication device is in contact with the living body, using the status signal as an input; A wireless communication system, wherein the status signal transmission process is a process of transmitting the status signal using a detection value of a sensor that detects the status of the living body as an input.

4. 4. The wireless communication system according to claim 1, wherein the priority process includes a process of not establishing a wireless connection when the first wireless communication device is not in contact with the living body.

5. the first wireless communication device is configured to execute a contact determination process for determining whether or not the first wireless communication device is in contact with the living body, using a detection value of a sensor that detects a state of the living body as an input; 4. The wireless communication system according to claim 1, wherein the state signal is a signal indicating a result of the contact determination process.

6. the sensor includes a first temperature sensor, a second temperature sensor, and a thermal resistor; The first temperature sensor is disposed closer to the living body than the second temperature sensor, 6. The wireless communication system according to claim 5, wherein the second temperature sensor is a sensor facing the first temperature sensor via the thermal resistor.

7. A first wireless communication device and a second wireless communication device, the first wireless communication device is capable of transmitting a status signal indicating a contact status with a living body; the second wireless communication device is configured to perform a strength detection process, a strength determination process, a connection process, and a priority process; the strength detection process is a process of detecting a reception strength of a signal transmitted from the first wireless communication device, the strength determination process is a process of determining whether the reception strength is equal to or greater than a predetermined strength, the connection process is a process of wirelessly connecting to the first wireless communication device on condition that the reception strength is equal to or greater than the predetermined strength, A wireless communication system, wherein the priority process includes a process of making the predetermined intensity when in contact with the living body smaller than the predetermined intensity when not in contact with the living body.

8. configured to perform a receiving process, a connecting process, a priority process, a strength detection process, and a selection process; the reception process is a process of receiving a signal transmitted by an external wireless communication device in a state in which a wireless connection with the external wireless communication device has not been established; the transmitted signal includes a status signal; the status signal is a signal indicating whether or not the external wireless communication device is in contact with the living body, the connection process is a process of wirelessly connecting to the external wireless communication device, the priority process includes a process of using the status signal as an input and performing the connection process preferentially when the external wireless communication device is in contact with the living body compared to when the external wireless communication device is not in contact with the living body; the strength detection process is a process of detecting a reception strength of a signal transmitted from the external wireless communication device, the selection process is a process of selecting, from among the plurality of external wireless communication devices, a device having a maximum corresponding determination strength to start communication with, The determination strength is a variable having a positive correlation with the reception strength, A wireless communication device, wherein the priority processing includes processing for making the relative magnitude of the judgment strength to the receiving strength of a signal transmitted from the external wireless communication device in contact with the living body greater than the relative magnitude of the judgment strength to the receiving strength of a signal transmitted from the external wireless communication device that is not in contact with the living body.

9. configured to execute a reception process, a connection process, a priority process, a strength detection process, and a strength determination process; the reception process is a process of receiving a signal transmitted by an external wireless communication device in a state in which a wireless connection with the external wireless communication device has not been established; the transmitted signal includes a status signal; the state signal is a signal indicating whether or not the external wireless communication device is in contact with the living body, the connection process is a process of wirelessly connecting to the external wireless communication device, the priority process includes a process of using the status signal as an input and performing the connection process preferentially when the external wireless communication device is in contact with the living body compared to when the external wireless communication device is not in contact with the living body; the strength detection process is a process of detecting a reception strength of a signal transmitted from the external wireless communication device, the strength determination process is a process of determining whether the reception strength is equal to or greater than a predetermined strength, the connection process is a process of wirelessly connecting to the external wireless communication device on condition that the reception strength is equal to or greater than the predetermined strength, The wireless communication device, wherein the priority processing includes processing for making the predetermined intensity when in contact with the living body smaller than the predetermined intensity when not in contact with the living body.

10. configured to execute a reception process, a connection process, a priority process, a strength detection process, and a strength determination process; the reception process is a process of receiving a signal transmitted by an external wireless communication device in a state in which a wireless connection with the external wireless communication device has not been established; the transmitted signal includes a status signal; the state signal is a signal indicating whether or not the external wireless communication device is in contact with the living body, the strength detection process is a process of detecting a reception strength of a signal transmitted from the external wireless communication device, the strength determination process is a process of determining whether the reception strength is equal to or greater than a predetermined strength, the connection process is a process of wirelessly connecting to the external wireless communication device on condition that the reception strength is equal to or greater than the predetermined strength, The wireless communication device, wherein the priority processing includes processing for making the predetermined intensity when in contact with the living body smaller than the predetermined intensity when not in contact with the living body.

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