Communication apparatus, communication system, communication method, and program

A communication system, comprising:

• a first communication apparatus that communicates with a second communication apparatus using short-distance one-to-one communication via electric field coupling or magnetic field coupling;
• the second communication apparatus comprising:
• a communication part that communicates with the first communication apparatus or a third communication apparatus using the short-distance one-to-one communication via electric field coupling or magnetic field coupling, the communication part establishing communication between the second communication apparatus and the first communication apparatus or the third communication apparatus while the second communication apparatus is brought in close alignment with the first communication apparatus or the third communication apparatus by a user;
• an operation part that accepts a user operation by the user to set or release a relay transfer mode for the communication apparatus;
• a relay transfer mode setting part that sets the communication apparatus into a relay transfer mode based on the user operation of the operation part;
• a reception processing part that
• receives file metadata transmitted from the first communication apparatus, the file metadata including data indicating file names and total number of data files to be transmitted from the first communication apparatus to the second communication apparatus;
• receives data files from the first communication apparatus after the communication part has established communication between the second communication apparatus and the first communication apparatus, and while the relay transfer mode is set;
• and
• while the relay transfer mode is set, determines whether file transmission from the first communication apparatus has completed by determining whether a total number of data files received match the data included in the file metadata;
• a storage part that holds the data files received from the first communication apparatus while the relay transfer mode is set;
• and
• a transmission control part that automatically transmits, if communication is established with the third communication apparatus, the data files held by the storage part to the third communication apparatus while the relay transfer mode is set and while the second communication apparatus is brought in close alignment with the third communication apparatus by the user, without requiring the user to select via the operation part which data file to transmit;
• and
• the third communication apparatus that is different from the first communication apparatus and that performs communication with the second communication apparatus using the short-distance one-to-one communication via electric field coupling or magnetic field coupling.

A communication method, comprising the steps of:

• performing, by a communication part of a communication apparatus, short-distance one-to-one communication with a communication partner apparatus including at least one of a first apparatus or a second apparatus via electric field coupling or magnetic field coupling,
• the communication part establishing communication between the communication apparatus and the first apparatus or the second apparatus while the communication apparatus is brought in close alignment with the first apparatus or the second apparatus by a user;
• receiving, by an operation part of the communication apparatus, a user operation by the user to set or release a relay transfer mode;
• setting, by a relay transfer mode setting part of the communication apparatus, a relay transfer mode based on the user operation;
• receiving, by a reception processing part of the communication apparatus, file metadata transmitted from the first apparatus, the file metadata including data indicating file names and total number of data files to be transmitted from the first apparatus to the communication apparatus;
• receiving, by the reception processing part of the communication apparatus, data files from the first apparatus after the communication part has established communication between the communication apparatus and the first apparatus, and while the relay transfer mode is set;
• determining, by the reception processing part of the communication apparatus, while the relay transfer mode is set, whether file transmission from the first apparatus has completed by determining whether a total number of data files received match the data included in the file metadata;
• holding, by a storage part of the communication apparatus, the data files received from the first apparatus in a storage part while the relay transfer mode is set;
• transmitting, automatically by a transmission control part of the communication apparatus, if communication is established with the second apparatus, the data files held in the storage part to the second apparatus while the relay transfer mode is set and while the communication apparatus is brought in close alignment with the second apparatus by the user, without requiring the user to select via the operation part which data file to transmit;
• and
• releasing, by the relay transfer mode setting part of the communication apparatus, the relay transfer mode.

A non-transitory computer-readable medium encoded with a computer program, which when executed by a communication apparatus, causes the communication apparatus to perform a process comprising:

• performing short-distance one-to-one communication with a communication partner apparatus including at least one of a first apparatus or a second apparatus via electric field coupling or magnetic field coupling, wherein performing communication comprises establishing communication between the communication apparatus and the first apparatus or the second apparatus while the communication apparatus is brought in close alignment with the first apparatus or the second apparatus by a user;
• receiving file metadata transmitted from the first apparatus, the file metadata including data indicating file names and total number of data files to be transmitted from the first apparatus to the communication apparatus;
• receiving data files from the first apparatus after the communication part has established communication between the communication apparatus and the first apparatus, and while a relay transfer mode is set;
• and
• determining, while the relay transfer mode is set, whether file transmission from the first apparatus has completed by determining whether a total number of data files received match the data included in the file metadata;
• receiving a user operation from the user to set or release a relay transfer mode;
• holding the data files received from the first apparatus in a storage part while the relay transfer mode is set;
• and
• transmitting automatically, if communication is established with the second apparatus, the data files held in the storage part to the second apparatus while the relay transfer mode is set and while the communication apparatus is brought in close alignment with the second apparatus by the user, without requiring the user to select via the operation part which data file to transmit.