Embodiments of this application provide communications methods and user equipments. A communications method disclosed herein comprises: obtaining, by a user equipment, at least one signal value that is generated based on contact between the user equipment and a human body, where the human body is also in contact with another user equipment; determining at least one transmission parameter at least according to the at least one signal value and a preset transmission parameter rule; and communicating with the another user equipment at least according to the at least one transmission parameter.

Embodiments of the present application provide interaction methods and user equipment. An interaction method disclosed here in comprises: determining, by a user equipment, information that needs to be sent to at least one other user equipment, wherein the at least one other user equipment and the user equipment are in contact with a same human body; determining at least one frequency corresponding to the information at least according to the information and a preset information rule; and controlling a capacitance value of the user equipment to change at the at least one frequency.

A computing device includes signal generation circuitry and also includes a location on the computing device that is operative to couple a signal generated by the signal generation circuitry into a user. For example, the computing device includes signal generation circuitry that generates a signal that includes information corresponding to a user and/or an application that is operative within the computing device. The signal generation circuitry couples the signal into the user from a location on the computing device based on a bodily portion of the user being in contact with or within sufficient proximity to the location on the computing device that facilitates coupling of the signal into the user. Also, the signal may be coupled via the user to another computing device that includes a touchscreen display that is operative to detect and receive the signal.

Provided is a capsule endoscope that includes a light source configured to emit light to an internal surface of an organ of a human body, an image sensor configured to use light reflected from the internal surface of the organ to generate image data, a processor configured to perform coding on the image data to generate coded data, and perform logical operation on the coded data and a binary code to generate final data, and a communication circuit configured to output the final data to an outside of the human body.

A safety system for an object having a transmitter that comprises a microcontroller to generate an identification signal having a given frequency and a resonant circuit to amplify the signal. The transmitter is suitable to be placed in the vicinity of the body of a person to capacitively couple the identification signal to it. The safety system also comprises a receiver suitable to be capacitively coupled to the body in order to receive the first identification signal and to recognize based on the identification signal if a user is an authorized user. The safety system estimates the actual resonant frequency of the resonant circuit when the circuit is amplifying the signal and the microcontroller is adapted to choose as frequency for the identification signal the closest frequency to the estimated actual resonant circuit it can generate so that the amplification of the identification signal is maximized.

Disclosed is a method performed in a system comprising a first Body Area Network (BAN) enabled device and a second BAN enabled device, for performing secure payment at a payment counter by a user of the first and the second BAN enabled devices, the user wearing or carrying the first and the second BAN enabled devices; where the first and the second BAN enabled devices are paired for authorizing the user by the second BAN enabled device; the method comprises: establishing a connection between the payment counter and the first BAN enabled device; sending a BAN signal via BAN from the first BAN enabled device to the second BAN enabled device requiring confirmation from the second BAN enabled device that the second BAN enabled device is in contact with the user's body; receiving a confirmation BAN signal via BAN from the second BAN enabled device to the first BAN enabled device confirming that the second BAN enabled device is in contact with the user's body; receiving a request for payment from the payment counter in the first and/or second BAN enabled device; and confirming the requested payment in the first and/or second BAN enabled device.

According to various, but not necessarily all, embodiments there is provided an apparatus comprising means for: obtaining a propagation profile for wireless signals transmitted between at least two devices via a creeping wave along a user's skin; causing transmission of electromagnetic radiation towards a plurality of locations on a target user's body to obtain dielectric properties of their skin at the plurality of locations based on an amount of the electromagnetic radiation reflected from each location; determining whether the propagation profile correlates with a realizable creeping wave along the target user's skin, the realizability being based on the obtained dielectric properties of their skin; and forming an association between the target user and the at least two devices based on a strength of correlation between the propagation profile and a realizable creeping wave.

A method for use within a WBAN, the method comprising creating a motion profile and a corresponding channel quality profile and using the motion profile to determining preferable conditions for MAC communication within the WBAN.

Numerous aspects of communication devices, methods, and systems are described in this application. One aspect is an apparatus comprising an energy generator comprising: a plurality of generator elements operable to output a plurality of different energy types in a signal direction toward a physiologic tissue; a printed circuit board that mechanically supports and electrically connects the plurality of generator elements to each other; each generator element of the plurality of generator elements being independently operable, when the energy generator is positioned relative to the physiologic tissue, to communicate with different nerves associated with the physiologic tissue by outputting a different portion of an energy signal in the signal direction toward the physiologic tissue with one energy type of the plurality of different energy types.

In a general aspect, a portable electronic device can include a digital display including a first electrically conductive plane. The first electrically conductive plane can be configured to neutralize electromagnetic radiation produced by the digital display. The portable electronic device can also include a data transmission device configured to transmit data by intracorporeal current. The data transmission device can include a first electrode that is configured to be capacitively coupled with a body of a user and a second electrode that includes the first electrically conductive plane. The first electrically conductive plane can be electrically coupled with an electrical ground of the data transmission device. The portable electronic device can further include a printed circuit including a second electrically conductive plane. The second electrically conductive plane can be included in the second electrode of the data transmission device.