Communication system, communication device, and program

A communication device capable of carrying out intra-body communication with a communication unit, the communication device comprising:

• a capacitive touch panel;
• an intra-body communication antenna placed to be close to a user's body;
• an intra-body communication unit configured to carryout data communication with the communication unit via the body by using an electrostatic field at a first position where the communication unit and the body are close to each other and an electrostatic field at a second position where the body and the intra-body communication antenna are close to each other;
• and
• an intra-body communication control unit configured to perform signal strength increasing control to increase signal strength of a signal received at the intra-body communication unit when a measured value of the signal strength is lower than a predetermined threshold under a condition that user's touch operation on the touch panel is started, wherein
• the signal strength increasing control is control for increasing voltage for controlling a charge amount of a charge control unit of the communication unit according to a difference between the predetermined threshold and the measured value to increase the signal strength.

A non-transitory recording medium storing a computer readable program, the program causing a computer served as a communication device to execute the processing comprising the steps of:

• a) carrying out data communication with a communication unit via a user's body by using an electrostatic field at a contact position between the body and an intra-body communication antenna placed to be close to the body;
• and
• b) performing signal strength increasing control to increase signal strength of a signal received by the intra-body communication antenna when a measured value of the signal strength is smaller than a predetermined threshold under a condition that user's touch operation on a capacitive touch panel provided on the communication device is started, wherein
• the signal strength increasing control is control for increasing voltage for controlling a charge amount of a charge control unit of the communication unit according to a difference between the predetermined threshold and the measured value to increase the signal strength.

A communication system comprising:

• a first communication device carried by a user;
• and
• a second communication device that carries out data communication with the first communication device via the user's body, wherein
• the second communication device includes:
• a capacitive touch panel,
• an intra-body communication antenna placed to be close to the body, and
• a charge control unit configured to control an amount of charge on a surface of the body,
• the first communication device includes:
• a first intra-body communication unit configured to carry out data communication with the second communication device via the body by using an electrostatic field at a first position where the second communication device and the body are close to each other and an electrostatic field at a second position where the intra-body communication antenna and the body are close to each other,
• an acquisition unit configured to acquire information on user's touch operation on the touch panel, and
• an intra-body communication control unit configured to perform signal strength increasing control to increase signal strength of a received signal at the first intra-body communication unit when a measured value of the signal strength is lower than a predetermined threshold under a condition that user's touch operation on the touch panel is started, and
• the signal strength increasing control is control for increasing voltage for controlling a charge amount of the charge control unit according to a difference between the predetermined threshold and the measured value to increase the signal strength.

A communication device carried by a user, comprising:

• a first intra-body communication unit configured to carry out data communication with a communication counterpart device via the user's body by using an electrostatic field at a first position where the communication counterpart device and the user's body are close to each other and an electrostatic field at a second position where the body and an intra-body communication antenna provided at the communication counterpart device are close to each other;
• an acquisition unit configured to acquire information on user's touch operation on a capacitive touch panel provided on the communication counterpart device, and
• an intra-body communication control unit configured to perform signal strength increasing control to increase signal strength of a received signal at the first intra-body communication unit when a measured value of the signal strength is lower than a predetermined threshold under a condition that user's touch operation on the touch panel is started, wherein
• the signal strength increasing control is control for increasing voltage for controlling a charge amount of a charge control unit provided in the communication counterpart device according to a difference between the predetermined threshold and the measured value to increase the signal strength.

A non-transitory recording medium storing a computer readable program, the program causing a computer served as a communication device carried by a user to execute the processing comprising the steps of:

• a) carrying out data communication with a communication counterpart device via the user's body by using an electrostatic filed at a first position where the communication counterpart device and the body are close to each other and an electrostatic field at a second position where the body and an intra-body communication antenna provided at the communication counterpart device are close to each other;
• b) acquiring information on user's touch operation on a capacitive touch panel provided on the communication counterpart device, and
• c) performing signal strength increasing control to increase signal strength of a signal received by the communication device when a measured value of the signal strength is smaller than a predetermined threshold under a condition that user's touch operation on the touch panel is started, wherein
• the signal strength increasing control is control for increasing voltage for controlling a charge amount of a charge control unit provided in the communication counterpart device according to a difference between the predetermined threshold and the measured value to increase the signal strength.