Portable, emergency call-capable mobile radio device and portable mobile radio locator

Abstract

Portable, emergency call-capable mobile radio device (10) comprising: a first wireless communication interface (60) implementing a WLAN access point, and / or, a second wireless communication interface (61) implementing a near-field communication protocol, and / or a third wireless communication interface (62) implementing a short-range radio communication protocol, a storage device (40, 50), at least one sensor (71) designed to measure vital signs of a user, a control unit (30) which is designed to - to cause the portable, emergency call-capable mobile radio device (10) to store the vital signs measured by the at least one sensor (71) in the storage device (40, 50), - in response to a predetermined event, to cause the portable, emergency call-capable mobile radio device (10) to make an emergency call and to store a time at which the emergency call was made in the memory device (40, 50), - in response to the emergency call made, to activate an emergency operation and to cause the portable, emergency call-capable mobile radio device (10) to transmit radio signals using the first, and / or second and / or third communication interface (60-62) during the activated emergency operation, wherein the radio signals transmit the time at which the emergency call was made and / or at least one piece of identification information characterizing the portable, emergency call-capable mobile radio device (10), and - only in response to the emergency call, to enable the transmission of vital values ​​stored in the memory device (40, 50) using the first and / or second and / or third wireless communication interface (60-62) and / or the retrieval of vital values ​​stored in the memory device (40, 50) by an external electronic device, wherein the control unit (30) is designed to cause the portable, emergency call-capable mobile radio device (10) to transmit the stored vital signs in encrypted form, the time at which the emergency call was made being used as a symmetric key, and the portable, emergency call-capable mobile radio device (10) is designed to be worn on the user's body.

Description

[0001] The invention relates to a portable, emergency call-capable mobile radio device and a portable mobile radio search device.

[0002] It is known that in an emergency a person can make an emergency call manually by entering an emergency number, for example the digits 112, for example using their smartphone. The person is then usually connected to an emergency call center and, provided they are still able to make themselves known, can communicate their emergency situation and location over the phone. After the emergency call has been ended, no further communication takes place, so that even if the person's location changes after the emergency call has been ended, their location can no longer be communicated. Even if a smartphone has a GPS receiver and can make an emergency call automatically, the location is only communicated to the control center once by the smartphone. The control center then usually passes on the location and, if applicable, the time at which the emergency call was made to emergency services.

[0003] For example, to determine the location of a mobile phone, special devices called IMSI (International Mobile Subscriber Identity) catchers can be used. An IMSI catcher is capable of reading the IMSI (International Mobile Subscriber Identity) of a mobile network, thus narrowing down the location within a radio cell.

[0004] Another way to determine the location of a mobile phone is the so-called WLAN-based positioning, which is described, for example, on the Internet at the URL “HTTPS: / / de.wikipedia.org / wiki / wlan-basierte_ortung”.

[0005] US 2015 / 0 365 808 A1 discloses a wireless communication system for human rescue that uses the signal strength between a mobile device of a person seeking assistance and a mobile device of a rescuer to determine the location of the person seeking assistance. The system uses a remote server database to receive emergency call messages from the person seeking assistance's mobile device and send these messages to the rescuer's mobile device.

[0006] DE 10 2010 040 594 A1 discloses a method for locating a mobile telecommunications device that sends an emergency call over a mobile network. When an emergency call is received, an emergency call controller of the mobile telecommunications device transmits an emergency code via a short-range radio interface, which is recognized by a locating device. Furthermore, the locating device determines the direction to the mobile telecommunications device.

[0007] From US 2012 / 0 064 855 A1, a system is known to assist a mobile phone user in being more easily located in an emergency or disaster situation, even if a wireless or other communication system fails.

[0008] EP 1 785 170 B1 describes a search and transmit device whose evaluation device is designed to detect, as physiological parameters, for example, the heart rate, a pulse in a blood vessel or the breathing of a user.

[0009] EP 3 217 865 B1 discloses a mobile software app that reacts to changes in heart rate in order to alert the supervisor of a person to be protected.

[0010] The invention is based on the object of providing a portable, emergency call-capable mobile radio device and a portable mobile radio device which enable a location determination of the portable, emergency call-capable mobile radio device after an emergency call has been made in a simple and cost-effective manner, even if the position of the portable, emergency call-capable mobile radio device should change after the emergency call has been made.

[0011] A core idea of ​​the invention can be seen in the creation of a portable, emergency call-capable mobile radio device which, in response to the making of an emergency call, begins to transmit radio signals, for example via a first wireless communication interface which implements a WLAN access point, and / or via a second wireless communication interface which implements a near-field communication protocol, and / or via a third wireless communication interface which implements a short-range radio communication protocol, preferably until the transmission of the radio signals is specifically deactivated again on the emergency call-capable mobile radio device.These radio signals can be received and evaluated by appropriately trained portable mobile radio locators used by emergency personnel and communicatively connected to a portable, emergency call-capable mobile device. These devices determine the signal strength of the received radio signals. Using the determined signal strengths, emergency personnel can locate the emergency call-capable mobile phone that made the emergency call in order to more quickly locate a person in distress.

[0012] One particular advantage of such a portable, emergency call-capable mobile device and such a portable mobile locator is that existing technologies, such as Wi-Fi, Near Field Communication (NFC), and Bluetooth technology, which are particularly used in smart phones, so-called smartphones, can be used without the need for expensive and complex mobile devices. Thanks to the use of Wi-Fi signals, NFC signals, and / or Bluetooth signals, the location of people in accidents and emergencies can be supported over an extended period of time, even after an emergency call has been made and in difficult terrain situations.

[0013] The use of a portable, emergency-capable mobile radio device leads, in particular, to a time saving that saves lives and effectively improves the close-quarters rescue of people from particularly dangerous situations (e.g., buried persons, lack of visual and / or hearing contact caused, for example, by adverse weather conditions). Compared to the current state of the art, it avoids the use of special equipment, such as avalanche rescuers, and the planned provision of special search devices, which are particularly personnel-intensive and require special tracking techniques.

[0014] The above-mentioned technical problem is solved, on the one hand, by the features of claim 1.

[0015] Accordingly, a portable, emergency call-capable mobile radio device is provided, which can have the following features: a first wireless communication interface implementing a WLAN (Wireless Local Area Network) access point, and / or, a second wireless communication interface implementing a near-field communication protocol, and / or a third wireless communication interface implementing a short-range radio communication protocol, a storage device, at least one sensor designed to measure vital signs of a user, a control unit designed to - to cause the portable, emergency call-capable mobile radio device to store the vital signs measured by the at least one sensor in the storage device, - in response to a predetermined event, to cause the portable, emergency call-capable mobile radio device to make an emergency call and to store a time at which the emergency call was made in the storage device, - in response to the emergency call made, to activate an emergency mode and to cause the portable, emergency call-capable mobile radio device to transmit radio signals using the first, and / or second and / or third communication interface during the activated emergency mode, wherein the radio signals transmit the time at which the emergency call was made and / or at least one piece of identification information characterizing the portable, emergency call-capable mobile radio device, and - only in response to the emergency call, to enable the transmission of vital values ​​stored in the memory device (40, 50) using the first and / or second and / or third wireless communication interface (60-62) and / or the retrieval of vital values ​​stored in the memory device (40, 50) by an external electronic device, wherein the control unit (30) is designed to cause the portable, emergency call-capable mobile radio device (10) to transmit the stored vital signs in encrypted form, wherein the time at which the emergency call was made is used as a symmetric key, and wherein. the portable, emergency call-capable mobile radio device (10) is designed to be worn on the user's body.

[0016] Vital signs are perceptible and verifiable or measurable human life functions. These include, for example, pulse, blood pressure, and body temperature. The sensor is preferably designed to measure pulse, blood pressure, or body temperature.

[0017] The time at which the emergency call was made and / or the at least one time transmitted with the radio signals serve to clearly assign the radio signals to be transmitted to the emergency call made.

[0018] Such a WLAN (Wireless Local Area Network) access point is also known as a mobile WLAN access point or mobile WLAN hotspot. The near-field communication protocol, also known as NFC (Near Field Communication), is an international transmission standard based on radio frequency identification (RFID) technology for the contactless exchange of data. The short-range radio communication protocol, for example, is a Bluetooth standard, which is defined, for example, in the IEEE 802.15.1 standard. These standards are also known as wireless personal area networks (WPANs). It should be noted that the first, second, and / or third communication interfaces can each be implemented using hardware and software components. Each of the communication interfaces can, but does not have to, have its own hardware-based transmitting and receiving device, for example in the form of an antenna.The identification information can be, for example, a mobile phone number or an International Mobile Subscriber Identity (IMSI). When using a Wi-Fi access point, it can be an SSID (Service Set Identifier), which can be freely selected by the user. An SSID is specifically used by the emergency call-capable mobile device to identify itself as a device seeking assistance.

[0019] The control unit is particularly designed as a software-controlled control unit. For this purpose, software can be stored in a memory device of the portable, emergency-capable mobile device. The software can, for example, contain a mobile operating system that controls and monitors the portable, emergency-capable mobile device. The software can also contain an application program that, when executed by the control unit, puts the portable, emergency-capable mobile device into emergency mode.

[0020] The portable, emergency call-capable mobile device may have a fourth wireless communication interface that implements a mobile communications standard such as UMTS (Universal Mobile Telecommunications System), LTE (Long Term Evolution) and 5G.

[0021] The portable, emergency call-capable mobile radio device can preferably be designed as a mobile phone, such as a smartphone.

[0022] Preferably, the control unit can be configured to activate the at least one sensor for measuring vital signs in response to the emergency call. This makes it possible to collect historical data on the person's health status after the emergency call has been made and to transmit these vital signs, for example, via the first, second, and / or third communication interface.

[0023] It is also conceivable that personal data is stored in the storage device or a separate storage device, which can also be transmitted in response to an emergency call and / or through targeted authorization by the user via the first, and / or second and / or third communication interface.

[0024] The feature according to claim 1, according to which an emergency call is made in response to a predetermined event, is to be understood in particular to mean that the making of an emergency call can be triggered by a user, ie for example by manual or voice input of an emergency number on the portable, emergency call-capable mobile radio device, or automatically by the portable, emergency call-capable mobile radio device.

[0025] In order to be able to automatically make an emergency call, the portable, emergency call-capable mobile device can, for example, have a motion sensor and / or acceleration sensor and / or fall sensor, which, for example, outputs a control signal when a specific emergency situation is detected. An emergency situation can, for example, be detected by an unusual change in speed or by the user falling. The control unit can be designed to cause the portable, emergency call-capable mobile device to make an emergency call in response to the motion sensor and / or acceleration sensor and / or fall sensor or the control signal generated by the motion sensor and / or acceleration sensor and / or fall sensor, for example by automatically dialing the emergency number stored in the portable, emergency call-capable mobile device.

[0026] In the event that a user is no longer able to verbally communicate their location to the control center via an emergency call, a Global Navigation Satellite System (GNSS) receiver, such as a GPS receiver, can be implemented in the portable, emergency-capable mobile device. This receiver is designed to determine the position of the portable, emergency-capable mobile device. Preferably, the position of the portable, emergency-capable mobile device, which was determined by the GNSS receiver before the emergency call was made, is transmitted along with the emergency call. In this way, the location of the user or the portable, emergency-capable mobile device is automatically communicated to the called control center.

[0027] The above-mentioned technical problem is also solved by the features of claim 8.

[0028] Accordingly, a portable mobile phone search device is provided which can have the following features: a first wireless communication interface which implements a WLAN access point and is designed to receive radio signals transmitted from a portable, emergency call-capable mobile radio device, which has been described above by way of example, via its first wireless communication interface, and / or, a second wireless communication interface implementing a near-field communication protocol and configured to receive radio signals transmitted by the portable, emergency call-capable mobile device via its second wireless communication interface, and / or a third wireless communication interface implementing a short-range radio communication protocol and configured to receive radio signals transmitted by the portable, emergency call-capable mobile device via its third wireless communication interface, a control and / or evaluation unit which is designed to determine the signal strength of the received radio signals, the time of an emergency call made by the portable, emergency call-capable mobile device and / or to determine at least one piece of identification information transmitted by means of the radio signals and characterizing the portable, emergency call-capable mobile radio device, and a device for optically and / or acoustically outputting a signal corresponding to the determined signal strength.

[0029] In this way, it is possible for emergency services equipped with such a portable mobile radio search device to record the signal strength of the received radio signals based on a WLAN communication standard, a near-field communication standard, or a short-range radio standard. The portable, emergency call-capable mobile radio device that transmits the radio signals can then be precisely located even after the emergency call has been made by the emergency services following the determined signal strength, which is preferably shown on a display of the portable mobile radio search device, in particular until the person is found. It is conceivable that the portable mobile radio search device is designed to output the direction of the person to be searched for on a display depending on the determined signal strength and / or acoustic tones depending on the determined signal strength via a loudspeaker, which become louder towards the person.If at least two emergency services personnel have such a portable mobile radio search device, known methods, such as triangulation, can be used to guide the emergency services personnel in the direction of the signal source and thus in the direction of the person to be searched for.

[0030] The control and / or evaluation unit is designed to decrypt the encrypted radio signals received by the portable, emergency call-capable mobile radio device, wherein the time transmitted by the portable, emergency call-capable mobile radio device is used as a symmetric key.

[0031] The portable mobile radio locator may have a wireless communication interface implementing a mobile radio standard such as UMTS (Universal Mobile Telecommunications System), LTE (Long Term Evolution) and 5G.

[0032] The portable mobile radio search device can be designed as a mobile phone, for example as a smartphone.

[0033] The times transmitted in the radio signals and / or the at least one piece of identification information identifying the mobile device serve, in particular, to prevent misuse of the method. This is because the transmitted identification information and / or the transmitted time are known only to the emergency services. They can thus directly assign the received radio signals to the portable, emergency call-capable mobile device to be located.

[0034] Preferably, the control and / or evaluation device can be designed to cause the portable mobile radio search device to query the vital values ​​stored in a memory device of the portable, emergency call-capable mobile radio device in response to the received radio signals.

[0035] The control and / or evaluation unit is designed to determine vital signs contained in the received radio signals, whereby the control and / or evaluation unit can be designed to cause the mobile radio search device to store the received vital signs in a storage device and / or to transmit them to an external location.

[0036] The invention is explained in more detail below using an exemplary embodiment and in conjunction with the accompanying drawings, in which: Fig. 1 an exemplary portable, emergency call-capable mobile radio device in which the invention is implemented, and Fig. 2 an exemplary portable mobile radio search device in which the invention is implemented.

[0037] In Fig. 1 shows an exemplary portable, emergency call-capable mobile radio device 10, which can be used in particular for locating people in distress. Advantageously, the exemplary mobile radio device 10 allows the location to be maintained after an emergency call has been made in a radio-based near field. The portable, emergency call-capable mobile radio device 10 can be designed, for example, as a mobile phone, such as a smartphone. Furthermore, the portable, emergency call-capable mobile radio device 10 can be designed to be worn on the body of a user. Preferably, the portable, emergency call-capable mobile radio device 10 can be designed as an electronic wristwatch or chest strap.

[0038] The portable, emergency call-capable mobile device 10 has, in particular, a first wireless communication interface 60 that implements a WLAN (Wireless Local Area Network) access point, and / or a second wireless communication interface 61 that implements a near-field communication protocol, and / or a third wireless communication interface 62 that implements a short-range radio communication protocol. The WLAN access point is preferably based on an IEEE 802.11 standard, the near-field communication protocol on an NFC (Near Field Communication) transmission standard, and the short-range radio communication protocol on a Bluetooth standard. In simple terms, the three wireless communication interfaces 60-62 are each designed to transmit near-field radio signals, i.e. WLAN signals, radio signals according to an NFC standard, orTo transmit or receive radio signals according to a Bluetooth standard, which may, for example, have a range of between 1 m and 100 m. The first, and / or second, and / or third wireless communication interfaces 60, 61, and 62, respectively, can each be implemented by hardware and software components. Each of the communication interfaces 60-62 can, but need not, have its own hardware-based transmitting and receiving device, which preferably includes an antenna. In . Fig. 1 shows an example of a hardware-based transmitting and receiving device 90, which, indicated by dashed lines, is assigned to the three wireless communication interfaces 60-62.

[0039] The portable, emergency call-capable mobile device 10 may have a fourth wireless communication interface 63 implementing a mobile radio standard such as UMTS (Universal Mobile Telecommunications System), LTE (Long Term Evolution) and 5G, which may be used in a manner per se.

[0040] Furthermore, the portable, emergency call-capable mobile radio device 10 has at least one memory device 40 in which software, which includes, for example, a mobile operating system, is stored. A control unit 30 implemented in the mobile radio device 10 is designed, in particular, to control and monitor the portable, emergency call-capable mobile radio device 10 while executing the operating system. The control unit 30 is preferably designed as a microcontroller or microprocessor.

[0041] The software may also include an emergency application program. Upon execution of the emergency application program, the control unit 30 may place the portable, emergency-capable mobile radio device 10 into an emergency mode in which the portable, emergency-capable mobile radio device 10 is caused to transmit radio signals via the first, second, and / or third wireless communication interfaces 60-62, as explained in more detail below.

[0042] An emergency number, for example the number 112, can also be stored in the memory device 40 or in a separate memory 50. For example, identification information that identifies the portable, emergency call-capable mobile device 10 and / or an emergency operation can also be stored in the memory device 40 or 50. The identification information can be, for example, a mobile phone number or an international mobile subscriber identity (also known as an International Mobile Subscriber Identity (IMSI)) and, when using the WLAN access point, an SSID (Service Set Identifier) ​​identifier that can be freely selected by the user, for example. For example, the SSID identifier contains the text "Notfall / Emergency," which can be transmitted with the WLAN signals via the WLAN access point or the first wireless communication interface 60 when emergency operation is activated.

[0043] The control unit 30 is preferably designed to i) in response to a predetermined event - for example, by entering the emergency number 112 on the mobile radio device 10 - to cause the portable, emergency call-capable mobile radio device 10 to make an emergency call and to store the time at which the emergency call was made in the memory device 40 or 50, and ii) in response to the emergency call made, to activate an emergency operation and to cause the portable, emergency call-capable mobile radio device 10 to transmit radio signals using the first, and / or second and / or third communication interface 60, 61 or 62 during the activated emergency operation, wherein the radio signals transmit the time at which the emergency call was made and / or at least one piece of identification information characterizing the portable, emergency call-capable mobile radio device 10.

[0044] Preferably, in response to a placed emergency call, the control unit 30 executes the emergency application program, whereby the portable, emergency call-capable mobile radio device 10 is placed in emergency mode and transmits radio signals associated with the placed emergency call via the first, and / or second and / or third wireless communication interfaces 60-62.

[0045] Particularly in the case where the portable, emergency call-capable mobile device 10 can be worn directly on a person's body, it can be useful and helpful if the portable, emergency call-capable mobile device 10 is configured to measure a user's vital signs. Vital signs are perceptible and verifiable or measurable vital functions of a person. These include, for example, pulse, blood pressure, and body temperature. For this purpose, the portable, emergency call-capable mobile device 10 can have at least one sensor 71 configured to measure a user's vital signs. The sensor 71 is preferably configured to measure a person's pulse, blood pressure, or body temperature.

[0046] Preferably, the control unit 30 is designed to cause the portable, emergency call-capable mobile radio device 10 to store the vital signs measured by the at least one sensor 71 in the storage device 40 or 50.

[0047] For example, in order to collect historical data on a person's state of health after an emergency call has been made, the control unit can be configured to activate at least one sensor 71 for measuring vital signs in response to the emergency call and to transmit the measured vital signs, for example, via the first, second, and / or third communication interface 60, 61, or 62. This enables emergency responders to make a better diagnosis from the received historical data of the measured vital signs and to save lives more effectively. For example, for the diagnosis of shock, the course of a pulse, ECG, or blood pressure from the onset of the emergency until the arrival of the emergency responders can be a very important life-saving diagnosis.

[0048] It is also conceivable that personal data is stored in the storage device 40 or 50, which can also be transmitted in response to the sending of an emergency call and / or by targeted authorization of the user from the portable, emergency call-capable mobile radio device 10 via the first, and / or second and / or third wireless communication interface 60, 61 or 62 in conjunction with the transmitting and receiving device 90.

[0049] To protect against misuse of the measured vital signs, the control unit 30 can preferably be designed to automatically transmit the stored vital signs and / or read or query the stored vital signs by an external electronic device, in particular an electronic device as shown in Fig. 2. Alternatively or additionally, the user can authorize the transmission or retrieval of the stored vital signs manually or by voice input on the portable, emergency call-capable mobile device.

[0050] To prevent unauthorized interception of the transmitted vital signs, the control unit 30 can be configured to cause the portable, emergency call-capable mobile radio device 10 to transmit the vital signs in encrypted form. For this purpose, the stored time at which the emergency call was made can be used as a key, for example. In practice, this time is also known to the emergency services or the search devices used by the emergency devices. This time can thus be used as a symmetric key for encrypting and decrypting the measured vital signs.

[0051] It should be noted that an emergency call can be made by the portable, emergency-capable mobile radio device 10 as soon as a user enters the corresponding emergency number on the portable, emergency-capable mobile radio device, for example, manually or verbally. It is also conceivable that an emergency call can be made automatically by the portable, emergency-capable mobile radio device 10 by automatically dialing the emergency number stored in the memory device 40 or 50 upon detection of an emergency.

[0052] In order to detect an emergency and automatically make an emergency call, the portable, emergency call-capable mobile device 10 can, for example, have a motion sensor and / or acceleration sensor and / or fall sensor 70, which, for example, outputs a control signal when a specific emergency situation is detected. An emergency situation can, for example, be detected by an unusual change in speed using the motion sensor and / or acceleration sensor 70 or by a fall of the user using a fall sensor. The control unit 30 can be configured to, in response to the motion sensor and / or acceleration sensor and / or fall sensor 70 orthe control signal generated by the motion sensor and / or acceleration sensor and / or fall sensor 70 causes the portable, emergency call-capable mobile radio device 10 to make an emergency call, for example by automatically dialing the stored emergency number and preferably transmitting information for identifying the portable, emergency call-capable mobile radio device 10 and a position indication to the called control center.

[0053] In the event that a user is no longer able to verbally communicate their location to a control center via an emergency call, a Global Navigation Satellite System (GNSS) receiver 80, such as a GPS (Global Positioning System) receiver, can be implemented in the portable, emergency-capable mobile device 10, for example. The receiver is configured to determine the position of the portable, emergency-capable mobile device 10. Preferably, the portable, emergency-capable mobile device 10 is configured to transmit, along with a placed emergency call, the position of the portable, emergency-capable mobile device 10, which was determined by the GNSS receiver 80 before the time of the placed emergency call. In this way, the location of the user or of the portable, emergency-capable mobile device 10 can be automatically communicated to the called control center once.

[0054] In order to be able to receive and evaluate the radio signals from the exemplary emergency call-capable mobile device 10 after an emergency call has been made via the first and / or second and / or third wireless communication interface 60, 61 or 62, an emergency worker can, for example, Fig. Use the portable mobile radio search device 20 shown in Figure 2. The portable mobile radio search device 20 can be designed as a mobile phone, for example, as a smartphone.

[0055] The exemplary mobile radio search device 20 preferably has a first wireless communication interface 140 implementing a WLAN (Wireless Local Area Network) access point, and / or a second wireless communication interface 141 implementing a near-field communication protocol, and / or a third wireless communication interface 142 implementing a short-range radio communication protocol. The WLAN access point is preferably based on an IEEE 802.11 standard, the near-field communication protocol is based on an NFC (Near Field Communication) transmission standard, and the short-range radio communication protocol is based on a Bluetooth standard. In simple terms, the three wireless communication interfaces 140-142 are each configured to transmit near-field radio signals, i.e. WLAN signals, radio signals according to an NFC standard, orTo transmit or receive radio signals according to a Bluetooth standard, which may, for example, have a range of between 1 m and 100 m. The first, and / or second, and / or third wireless communication interfaces 140, 141, and 142, respectively, may each be implemented by hardware and software components. Each of the communication interfaces 140-142 may, but need not, have its own hardware-based transmitting and receiving device, which preferably includes an antenna. In . Fig. 2 shows an example of a hardware-based transmitting and receiving device 130, which, indicated by dashed lines, is assigned to the three wireless communication interfaces 140-142.

[0056] The mobile radio search device 20 may have a fourth wireless communication interface 143 implementing a mobile radio standard such as UMTS (Universal Mobile Telecommunications System), LTE (Long Term Evolution) and 5G, which may be used in a manner per se.

[0057] The first wireless communication interface 140 of the mobile radio search device 20 is preferably designed to receive radio signals transmitted by the portable, emergency call-capable mobile radio device 10 via its first wireless communication interface 60. The second wireless communication interface 141 of the mobile radio search device 20 is preferably designed to receive radio signals transmitted by the portable, emergency call-capable mobile radio device 10 via its second wireless communication interface 61. The third wireless communication interface 142 of the mobile radio search device 20 is preferably designed to receive radio signals transmitted by the portable, emergency call-capable mobile radio device 10 via its third wireless communication interface 60.

[0058] Furthermore, the mobile radio search device 20 has a control and / or evaluation unit 100, which is designed to determine the signal strength of radio signals received, for example, by the portable, emergency call-capable mobile radio device 10, the time of an emergency call made by the portable, emergency call-capable mobile radio device 10, transmitted via the radio signals, and / or at least one piece of identification information transmitted via the radio signals and identifying the portable, emergency call-capable mobile radio device 10. Furthermore, the mobile radio search device 20 can have a device 150 for optically and / or acoustically outputting a signal corresponding to the determined signal strength. The device 150 can have a display for outputting optical signals and / or a loudspeaker for outputting audio signals.

[0059] In this way, emergency personnel equipped with such a portable mobile radio search device 20 can determine the signal strength of the received radio signals based on a WLAN communication standard, a near-field communication standard, or a short-range radio standard. The portable, emergency call-capable mobile radio device 10, which transmits the radio signals, can then be precisely located over an extended period of time, even after the emergency call has been made, by the emergency personnel following the determined signal strength, which is preferably output via the device 150 of the portable mobile radio search device 20, in particular until the person has been located.

[0060] Furthermore, the portable, emergency call-capable mobile device 10 can have at least one memory device 110 in which software, which can include, for example, a mobile operating system, is stored. The control and / or evaluation unit 100 implemented in the mobile radio search device 20 is preferably designed to control and monitor the portable mobile radio search device 20, in particular, while executing the operating system. The control and / or evaluation unit 100 is preferably designed as a microcontroller or microprocessor. The control and / or evaluation unit 100 can also be designed to decrypt encrypted radio signals received by the portable, emergency call-capable mobile device 10. The software stored in the memory device 110 can also contain a mobile app, executable by the control and / or evaluation unit 100, for determining the signal strength of received radio signals. Such apps are known.

[0061] It is conceivable that the portable mobile radio search device 20 is configured to indicate the direction of the person to be searched for on the display of the device 150, depending on the determined signal strength, and / or to output acoustic tones via a loudspeaker depending on the determined signal strength, which become louder towards the person. If at least two emergency personnel possess such a portable mobile radio search device 20, known methods, such as triangulation, can be used to guide the emergency personnel towards the signal source and thus towards the person to be searched for.

[0062] Preferably, the control and / or evaluation unit 100 is configured to cause the portable mobile radio search device 20 to query the vital signs stored in the memory device 40 or 50 of the portable, emergency-capable mobile radio device 10 in response to the radio signals received from the portable, emergency-capable mobile radio device 10. For this purpose, the mobile radio search device can, for example, transmit a query radio signal containing, for example, the mobile radio number or IMSI of the emergency-capable mobile radio device 10.

[0063] It should be noted that the time at which the portable, emergency call-capable mobile radio device 10 made an emergency call can be stored in the storage device 110 of the portable mobile radio search device automatically or with the assistance of an emergency worker.

[0064] The control and / or evaluation unit 100 is preferably capable of decrypting the radio signals encrypted using the time at which the emergency call was made, using the time stored in the memory device 110. It should be noted that any other symmetric key known to both the portable, emergency call-capable device 10 and the portable mobile radio locator 20 can also be used to encrypt and decrypt radio signals.

[0065] An exemplary mode of operation of the portable, emergency call-capable mobile radio device 10 in conjunction with the portable mobile radio search device 20 is explained in more detail below.

[0066] For ease of explanation, assume that the portable, emergency call-capable mobile device 10 is a smartphone, and the wireless communication interfaces 61 and 62, the motion sensor and / or acceleration sensor and / or fall sensor 70, the vital sign sensor 71, and the GPS receiver 80 are deactivated or not implemented. Furthermore, assume that the wireless communication interfaces 141 and 142 are deactivated or not implemented in the mobile radio locator 20.

[0067] Furthermore, it is assumed that the user of the mobile device 10 has gotten into distress and has dialed the emergency number using a keypad of the mobile device 10. In response to the dialed emergency number, an emergency call is made in a known manner via the mobile radio communication interface 63, and a connection is established to a control center. With the emergency call, preferably the time of the emergency call and, if applicable, the mobile phone number are transmitted to the control center. Once the connection is established, the user can communicate his or her position to the control center. The control center transmits the time of the emergency call, the position, and, if applicable, the mobile phone number of the mobile device 10 to at least one emergency responder equipped with the portable mobile radio locator 20.

[0068] After the emergency call has been made, the control unit 30 activates the portable, emergency call-capable mobile device 10 into emergency mode by executing the stored emergency application program, in which the portable, emergency call-capable mobile device 10 is caused to transmit radio signals according to a WLAN standard during the activated emergency mode via the first wireless WLAN-based communication interface 60, wherein the WLAN radio signals preferably transmit the time of the emergency call and, if applicable, an SSID identifier with the text “Notfall / Emergency” and / or the mobile phone number and / or the IMSI of the mobile device 10.

[0069] As soon as the emergency responder arrives at the scene of the incident, which is determined by the position previously transmitted to the control center, they activate the search function and thus also the WLAN-based communication interface 140 on their portable mobile radio search device 20. As soon as the mobile radio search device 20 is within the reception range of the WLAN-based radio signals transmitted by the emergency call-capable mobile radio device 10, the received radio signals are received by the WLAN-based communication interface 140. The control and evaluation unit connected to the WLAN-based communication interface 140 then determines the signal strength of the received radio signals, the time of the emergency call transmitted by the mobile radio device 10, and, if applicable, the SSID and mobile phone number and / or IMSI of the mobile radio device 10 transmitted with the radio signals.Since the time of the emergency call and, if applicable, the SSID and the mobile phone number and / or IMSI of the mobile device 10 are known to the mobile radio search device 20, the portable, emergency call-capable mobile device 10 can be specifically searched for by the emergency responder following the determined signal field strength until the person or the portable, emergency call-capable mobile device 10 is located. At this moment, the emergency operation of the portable, emergency call-capable mobile device 10 can be deactivated, whereupon the portable, emergency call-capable mobile device 10 no longer transmits radio signals via the first WLAN-based communication interface 60.

[0070] The functionality described above essentially corresponds to the functionality relevant to the case in which the emergency call-capable mobile device 10 uses the second wireless or third wireless communication interface 61 or 62 instead of the first communication interface 60, and the mobile radio search device 20 uses the second wireless or third wireless communication interface 141 or 142. However, in this case, no SSID is transmitted in the NFC-based or Bluetooth-based radio signals.

[0071] In the event that at least one vital sign sensor 71 has been implemented and activated in the emergency call-capable mobile device 10, vital signs can be measured, possibly stored in the storage device 40 or 50 and, if enabled, transmitted by means of the radio signals after the emergency call has been made.

[0072] In this case, the control and / or evaluation unit 100 of the mobile radio search device 20 can be configured to extract the vital signs received in the radio signals and make them available for further use. The control and / or evaluation unit 100 can be configured to cause the mobile radio search device 20 to store the received vital signs in the storage device 110 and / or transmit them to an external location.

Claims

[1] Portable, emergency call-capable mobile radio device (10) comprising: a first wireless communication interface (60) implementing a WLAN access point, and / or, a second wireless communication interface (61) implementing a near-field communication protocol, and / or a third wireless communication interface (62) implementing a short-range radio communication protocol, a storage device (40, 50), at least one sensor (71) designed to measure vital signs of a user, a control unit (30) which is designed to - to cause the portable, emergency call-capable mobile radio device (10) to store the vital signs measured by the at least one sensor (71) in the storage device (40, 50), - in response to a predetermined event, to cause the portable, emergency call-capable mobile radio device (10) to make an emergency call and to store a time at which the emergency call was made in the memory device (40, 50), - in response to the emergency call made, to activate an emergency operation and to cause the portable, emergency call-capable mobile radio device (10) to transmit radio signals using the first, and / or second and / or third communication interface (60-62) during the activated emergency operation, wherein the radio signals transmit the time at which the emergency call was made and / or at least one piece of identification information characterizing the portable, emergency call-capable mobile radio device (10), and - only in response to the emergency call, to enable the transmission of vital values ​​stored in the memory device (40, 50) using the first and / or second and / or third wireless communication interface (60-62) and / or the retrieval of vital values ​​stored in the memory device (40, 50) by an external electronic device, wherein the control unit (30) is designed to cause the portable, emergency call-capable mobile radio device (10) to transmit the stored vital signs in encrypted form, the time at which the emergency call was made being used as a symmetric key, and the portable, emergency call-capable mobile radio device (10) is designed to be worn on the user's body. [2] Portable, emergency call-capable mobile radio device (10) according to claim 1, wherein the short-range radio communication protocol implements a Bluetooth transmission standard. [3] Portable, emergency call-capable mobile radio device (10) according to one of the preceding claims, wherein the portable, emergency call-capable mobile radio device (10) is designed as a mobile telephone. [4] Portable, emergency call-capable mobile radio device (10) according to one of the preceding claims, wherein the portable, emergency call-capable mobile radio device (10) is an electronic wristwatch. [5] Portable, emergency call-capable mobile radio device (10) according to claim 1, wherein the control unit (30) is designed to activate the at least one sensor (71) for measuring at least one vital value in response to the emergency call made. [6] Portable, emergency call-capable mobile radio device (10) according to one of the preceding claims, further comprising a motion sensor, and / or acceleration sensor and / or fall sensor (70), wherein the control unit (30) is designed to cause the portable, emergency call-capable mobile radio device (10) to make an emergency call in response to the motion sensor and / or acceleration sensor and / or fall sensor (70). [7] Portable, emergency call-capable mobile radio device (10) according to one of the preceding claims, further comprising a GNSS (Global Navigation Satellite System) receiver (80) which is designed to determine the position of the portable, emergency call-capable mobile radio device (10), wherein the emergency call made contains the position of the portable, emergency call-capable mobile radio device (10) present at the time of the emergency call made. [8] Portable mobile radio search device (20) comprising: a first wireless communication interface (140) implementing a WLAN access point and configured to receive radio signals transmitted by a portable, emergency call-capable mobile radio device (10) according to any one of the preceding claims via the first wireless communication interface (60), and / or a second wireless communication interface (141) which implements a near-field communication protocol and is designed to receive radio signals transmitted by the portable, emergency call-capable mobile radio device (10) according to one of the preceding claims via the second wireless communication interface (61), and / or a third wireless communication interface (142) implementing a short-range radio communication protocol and configured to receive radio signals transmitted by the portable, emergency call-capable mobile radio device (10) according to any one of the preceding claims via the third wireless communication interface (62), a control and / or evaluation unit (100) which is designed to determine a signal strength of received radio signals, the time of an emergency call made by the portable, emergency call-capable mobile radio device (10) transmitted by means of the radio signals and / or at least one piece of identification information characterising the portable, emergency call-capable mobile radio device (10) transmitted by means of the radio signals, and a device (150) for optically and / or acoustically outputting a signal corresponding to the determined signal strength, wherein the control and / or evaluation unit (100) is further configured to decrypt encrypted radio signals received from the portable, emergency call-capable mobile radio device (10), wherein the time transmitted by the portable, emergency call-capable mobile radio device (10) is used as a symmetric key, and wherein the control and / or evaluation unit (100) is designed to determine vital signs contained in the received radio signals, wherein the control and / or evaluation unit (100) is designed to cause the portable mobile radio search device (20) to store the received vital signs in a storage device (110) and / or to transmit them to an external location.

Images