Communication device, data processing device, near field communication device, and method and program for communication

A data processing device to be connected to a near field communication device including

• a near field communication section for performing near field communication in either one of communication modes, an active mode and a passive mode, the active mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in each of a plurality of devices for transmitting/receiving data, and the passive mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in one of the plurality of devices and for transmitting data in another of the plurality of devices by load-modulating the electromagnetic wave output by the one of the plurality of devices, and
• an interface section for supplying the near field communication section with data from a data processing device for processing data targeted by communication of the near field communication section, and supplying the data processing device with data from the near field communication section,
• the data processing device comprising
• bus right management means, connected to the interface section by one output bus on which the data output by the interface section is transmitted, and one input bus on which the data input to the interface section is transmitted,
• for judging whether or not a state, in which a voltage level of the input bus is an unused level representing that the input bus is not used, has continued for a predetermined time period determined using a random number, and
• for setting the voltage level of the input bus to an in-use level representing that the input bus is in use, thereby obtaining a right of use of the input bus if it is judged that the state, in which the voltage level of the input bus is the unused level, has continued for the predetermined time period.

A method for communication of a data processing device connected to a near field communication device including

• a near field communication section for performing near field communication in either one of communication modes, an active mode and a passive mode, the active mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in each of a plurality of devices for transmitting/receiving data, and the passive mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in one of the plurality of devices and for transmitting data in another of the plurality of devices by load-modulating the electromagnetic wave output by the one of the plurality of devices, and
• an interface section for supplying the near field communication section with data from a data processing device for processing data targeted by communication of the near field communication section, and supplying the data processing device with data from the near field communication section, the data processing device being connected to the interface section by one output bus on which the data output by the interface section is transmitted, and one input bus on which the data input to the interface section is transmitted,
• the method comprising the steps of:
• judging whether or not a state, in which a voltage level of the input bus is an unused level representing that the input bus is not used, has continued for a predetermined time period determined using a random number;
• and
• setting the voltage level of the input bus to an in-use level representing that the input bus is in use, thereby obtaining a right of use of the input bus if it is judged that the state, in which the voltage level of the input bus is the unused level, has continued for the predetermined time period.

A program to be executed by a computer for controlling a data processing device connected to a near field communication device including

• a near field communication section for performing near field communication in either one of communication modes, an active mode and a passive mode, the active mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in each of a plurality of devices for transmitting/receiving data, and the passive mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in one of the plurality of devices and for transmitting data in another of the plurality of devices by load-modulating the electromagnetic wave output by the one of the plurality of devices, and
• an interface section for supplying the near field communication section with data from a data processing device for processing data targeted by communication of the near field communication section, and supplying the data processing device with data from the near field communication section, the data processing device being connected to the interface section by one output bus on which the data output by the interface section is transmitted, and one input bus on which the data input to the interface section is transmitted,
• the program comprising the instructions of:
• judging whether or not a state, in which a voltage level of the input bus is an unused level representing that the input bus is not used, has continued for a predetermined time period determined using a random number;
• and
• setting the voltage level of the input bus to an in-use level representing that the input bus is in use, thereby obtaining a right of use of the input bus if it is judged that the state, in which the voltage level of the input bus is the unused level, has continued for the predetermined time period.

A communication device for performing near field communication, comprising:

• a near field communication device including
• a near field communication section for performing near field communication in either one of communication modes, an active mode and a passive mode, the active mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in each of a plurality of devices for transmitting/receiving data, and the passive mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in one of the plurality of devices and for transmitting data in another of the plurality of devices by load-modulating the electromagnetic wave output by the one of the plurality of devices, and
• an interface section for supplying the near field communication section with data from a data processing device for processing data targeted by communication of the near field communication section, and supplying the data processing device with data from the near field communication section;
• and
• one or more of the data processing devices connected to the interface section by one output bus on which the data output by the interface section is transmitted, and one input bus on which the data input to the interface section is transmitted,
• wherein
• the interface section
• transmits a request for communication with one data processing device out of the one or more of the data processing devices via the output bus, and
• receives a response the one data processing device transmits in response to the request for communication via the input bus.

A near field communication device, comprising:

• a near field communication section for performing near field communication in either one of communication modes, an active mode and a passive mode, the active mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in each of a plurality of devices for transmitting/receiving data, and the passive mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in one of the plurality of devices and for transmitting data in another of the plurality of devices by load-modulating the electromagnetic wave output by the one of the plurality of devices;
• and
• an interface section for supplying the near field communication section with data from a data processing device for processing data targeted by communication of the near field communication section, and supplying the data processing device with data from the near field communication section,
• wherein
• the interface section is connected to one or more of the data processing devices by one output bus on which the data output by the interface section is transmitted, and one input bus on which the data input to the interface section is transmitted, and
• the interface section
• transmits a request for communication with one data processing device out of the one or more of the data processing devices via the output bus, and
• receives a response the one data processing device transmits in response to the request for communication via the input bus.

A method for communication of a near field communication device including

• a near field communication section for performing near field communication in either one of communication modes, an active mode and a passive mode, the active mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in each of a plurality of devices for transmitting/receiving data, and the passive mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in one of the plurality of devices and for transmitting data in another of the plurality of devices by load-modulating the electromagnetic wave output by the one of the plurality of devices, and
• an interface section for supplying the near field communication section with data from a data processing device for processing data targeted by communication of the near field communication section, and supplying the data processing device with data from the near field communication section,
• wherein
• the interface section is connected to one or more of the data processing devices by one output bus on which the data output by the interface section is transmitted, and one input bus on which the data input to the interface section is transmitted,
• the method comprising the steps of:
• transmitting by the interface section a request for communication with one data processing device out of the one or more of the data processing devices via the output bus;
• and
• receiving by the interface section a response the one data processing device transmits in response to the request for communication via the input bus.

A program to be executed by a computer for controlling a near field communication device including

• a near field communication section for performing near field communication in either one of communication modes, an active mode and a passive mode, the active mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in each of a plurality of devices for transmitting/receiving data, and the passive mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in one of the plurality of devices and for transmitting data in another of the plurality of devices by load-modulating the electromagnetic wave output by the one of the plurality of devices, and
• an interface section for supplying the near field communication section with data from a data processing device for processing data targeted by communication of the near field communication section, and supplying the data processing device with data from the near field communication section,
• wherein
• the interface section is connected to one or more of the data processing devices by one output bus on which the data output by the interface section is transmitted, and one input bus on which the data input to the interface section is transmitted,
• the program comprising the instructions of:
• the interface section transmitting a request for communication with one data processing device out of the one or more of the data processing devices via the output bus;
• and
• the interface section receiving a response the one data processing device transmits in response to the request for communication via the input bus.

A communication device for performing near field communication, comprising:

• a near field communication device having
• a near field communication section for performing near field communication in either one of communication modes, an active mode and a passive mode, the active mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in each of a plurality of devices for transmitting/receiving data, and the passive mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in one of the plurality of devices and for transmitting data in another of the plurality of devices by load-modulating the electromagnetic wave output by the one of the plurality of devices, and
• an interface section for supplying the near field communication section with data from a data processing device for processing data targeted by communication of the near field communication section, and supplying the data processing device with data from the near field communication section;
• and
• one or more of the data processing devices connected to the interface section by one output bus on which the data output by the interface section is transmitted, and one input bus on which the data input to the interface section is transmitted,
• wherein
• the data processing device includes a bus right management unit configured to
• judge whether or not a state, in which a voltage level of the input bus is an unused level representing that the input bus is not used, has continued for a predetermined time period determined using a random number, and
• set the voltage level of the input bus to an in-use level representing that the input bus is in use, thereby obtaining a right of use of the input bus if it is judged that the state, in which the voltage level of the input bus is the unused level, has continued for the predetermined time period.

A data processing device to be connected to a near field communication device including

• a near field communication section for performing near field communication in either one of communication modes, an active mode and a passive mode, the active mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in each of a plurality of devices for transmitting/receiving data, and the passive mode being a communication mode for transmitting data by outputting an electromagnetic wave and modulating the electromagnetic wave in one of the plurality of devices and for transmitting data in another of the plurality of devices by load-modulating the electromagnetic wave output by the one of the plurality of devices, and
• an interface section for supplying the near field communication section with data from a data processing device for processing data targeted by communication of the near field communication section, and supplying the data processing device with data from the near field communication section,
• the data processing device comprising
• a bus right management unit, connected to the interface section by one output bus on which the data output by the interface section is transmitted, and one input bus on which the data input to the interface section is transmitted, configured to
• judge whether or not a state, in which a voltage level of the input bus is an unused level representing that the input bus is not used, has continued for a predetermined time period determined using a random number, and
• set the voltage level of the input bus to an in-use level representing that the input bus is in use, thereby obtaining a right of use of the input bus if it is judged that the state, in which the voltage level of the input bus is the unused level, has continued for the predetermined time period.