Mobile device and infrastructure systems
AssigneeFraunhofer Portugal Research
InventorDirk Elias
Life of this patent
Estimating the term…
Abstract
Magnetic field sensors of mobile devices are used for providing the mobile devices with information at a locally extremely restricted area in that, specifically, a magnetic field modulated with the information is locally generated at this position by an information signal generator.
Claims35
An infrastructure system for a mobile device, the mobile device having an energy source which is a battery or an accumulator, the infrastructure system comprising:
- an information signal generator configured to generate a magnetic field modulated with information, the magnetic field to be detected through a Hall sensor or an x-magneto resistive (XMR) sensor;
- a data interface configured to receive a message, which depends on the information, from the mobile device via a high-frequency electromagnetic wave interface, wherein the high-frequency electromagnetic wave interface comprises a radio link and/or an optical link;
- and
- a processor connected to the data interface and configured to check the message for a match with the information, to localize the mobile device if the message matches with the information,
- wherein the information signal generator is configured such that a modulation frequency at which the magnetic field is modulated with the information corresponds to a bitrate of the information and is lower than 1 kHz, and
- wherein the information signal generator is configured to perform the modulation at the modulation frequency in a unipolar or bipolar manner so that the information is detectable by polling a magnetic field sensor at the bitrate.
A mobile device comprising:
- a magnetic field sensor for detecting a magnetic field generated by an infrastructure system, wherein the magnetic field sensor comprises a Hall sensor or an x-magneto resistive (XMR) sensor;
- an information extractor configured to extract from the magnetic field information with which the magnetic field is modulated in a unipolar or bipolar manner at a modulation frequency which corresponds to a bitrate of the information and is lower than 1 kHz, by polling the magnetic field sensor at the bitrate;
- and
- a data interface for transmitting to the infrastructure system, via a high-frequency electromagnetic wave interface, a message which depends on the information, wherein the high-frequency electromagnetic wave interface comprises a radio link and/or an optical link, and
- an energy source, which is a battery or an accumulator.
A method of providing an infrastructure for a mobile device, the mobile device having an energy source which is a battery or an accumulator, the method comprising:
- generating a magnetic field modulated with information in a unipolar or bipolar manner at a modulation frequency which corresponds to a bitrate of the information and is lower than 1 kHz so that the information is detectable by polling a magnetic field sensor at the bitrate, the magnetic field to be detected through a Hall sensor or an x-magneto resistive (XMR) sensor;
- receiving a message from the mobile device via a high-frequency electromagnetic wave interface, wherein the high-frequency electromagnetic wave interface comprises a radio link and/or an optical link;
- and
- checking the message for a match with the information, to localize the mobile device if the message matches with the information.
A method of operating a mobile device comprising a magnetic field sensor for detecting a magnetic field generated by an infrastructure system and an energy source which is a battery or an accumulator, the method comprising:
- extracting from the magnetic field information with which the magnetic field is modulated in a unipolar or bipolar manner at a modulation frequency which corresponds to a bitrate of the information and is lower than 1 kHz, by polling the magnetic field sensor at the bitrate, the magnetic field to be detected through a Hall sensor or an x-magneto resistive (XMR) sensor;
- and
- transmitting to the infrastructure system, via a high-frequency electromagnetic wave interface, a message which depends on the information, wherein the high-frequency electromagnetic wave interface comprises a radio link and/or an optical link.
A non-transitory computer-readable medium storing a computer program comprising a program code for performing a method of providing an infrastructure for a mobile device having an energy source which is a battery or an accumulator, said method comprising:
- generating a magnetic field modulated with information in a unipolar or bipolar manner at a modulation frequency which corresponds to a bitrate of the information and is lower than 1 kHz so that the information is detectable by polling a magnetic field sensor at the bitrate, the magnetic field to be detected through a Hall sensor or an x-magneto resistive (XMR) sensor;
- receiving a message from the mobile device via a high-frequency electromagnetic wave interface wherein the high-frequency electromagnetic wave interface comprises a radio link and/or an optical link;
- and
- checking the message for a match with the information, so as to localize the mobile device,
- when the program runs on a computer.
A non-transitory computer-readable medium storing computer program comprising a program code for performing a method of operating a mobile device comprising a magnetic field sensor for detecting a magnetic field generated by an infrastructure system, and an energy source which is a battery or an accumulator, the method, said method comprising:
- extracting from the magnetic field information with which the magnetic field is modulated in a unipolar or bipolar manner at a modulation frequency which corresponds to a bitrate of the information and is lower than 1 kHz, by polling the magnetic field sensor at the bitrate, the magnetic field to be detected through a Hall sensor or an x-magneto resistive (XMR) sensor;
- and
- transmitting to the infrastructure system, via a high-frequency electromagnetic wave interface, a message which depends on the information, wherein the high-frequency electromagnetic wave interface comprises a radio link and/or an optical link, when the program runs on a computer.
An infrastructure system for a mobile device having an energy source which is a battery or an accumulator, the infrastructure system comprising:
- an information signal generator configured to generate a magnetic field modulated with information, the magnetic field to be detected through a Hall sensor or an x-magneto resistive (XMR) sensor;
- a data interface configured to receive a message from the mobile device via a high-frequency electromagnetic wave interface, wherein the high-frequency electromagnetic wave interface comprises a radio link and/or an optical link;
- and
- a processor connected to the data interface and configured to check the message for a match with the information,
- wherein the information signal generator is configured modulate the magnetic field with the information
- in a unipolar or bipolar manner so that a bitrate of the information and a modulation frequency at which the magnetic field is modulated are lower than 1 kHz and the information is detectable by polling a magnetic field sensor at the bitrate.
Dependencies are inferred from the claim text.