Data communication device, arithmetic processing device, and control method of data communication device

An arithmetic processing device communicating with other devices via a plurality of communication paths, the arithmetic processing device comprising:

• a central processing unit (CPU) core configured to generate a packet containing data;
• a router circuit configured to generate header information and to add the header information to the packet;
• a plurality of buffers each corresponding to one of the plurality of communication paths;
• and
• a communication circuit configured to perform a transmission process and a reception process, the transmission process including
• receiving, from the router circuit, the packet containing the header information and the data,
• outputting start information to each of the communication paths,
• outputting, after the outputting of the start information, a same header information as the header information contained in the received packet to each of the communication paths,
• dividing the data into a plurality of data pieces, and
• outputting the data pieces to the respective communication paths;
• and
• the reception process including
• receiving start information, header information, and a data piece for each of the communication paths,
• storing, for each of the communication paths, the start information, the header information, and the data piece received from a corresponding one of the communication paths, into a corresponding buffer of the plurality of buffers, and
• reconstructing a packet from the header information and the data piece stored in the plurality of buffers, wherein
• the reconstructing of the packet includes
• identifying, for each of the communication paths, a location of the header information in the corresponding buffer based on the start information, and
• starting reading out the header information and the data piece from each of the buffers, in a case in which all the header information received and stored in the buffers is identical.

A method of controlling a data communication device communicating with other devices via a plurality of communication paths, the data communication device including a plurality of buffers each corresponding to one of the plurality of communication paths, the method comprising:

• performing, by a communication circuit in the data communication device, a transmission process including
• receiving a packet containing header information and data,
• outputting start information to each of the communication paths,
• outputting, after the outputting of the start information, a same header information as the header information contained in the received packet to each of the communication paths,
• dividing the data into a plurality of data pieces, and
• outputting the data pieces to the respective communication paths;
• and
• performing, by the communication circuit, a reception process including
• receiving start information, header information, and a data piece for each of the communication paths,
• storing, for each of the communication paths, the start information, the header information, and the data piece received from a corresponding one of the communication paths, into a corresponding buffer of the plurality of buffers, and
• reconstructing a packet from the header information and the data piece stored in the plurality of buffers, wherein
• the reconstructing of the packet includes
• identifying, for each of the communication paths, a location of the header information in the corresponding buffer based on the start information, and
• starting reading out the header information and the data piece from each of the buffers, in a case in which all the header information received and stored in the buffers is identical.