Data distribution system, data communication device and program for data distribution

A data distribution system comprising:

• plural distribution data communication devices each of which performs at least one of transmission of data to be distributed and reception of the data to be distributed, and
• a management data communication device that manages paths of data communications among the plural distribution data communication devices;
• wherein:
• the management data communication device comprises
• a receiving unit that receives, each time a predetermined condition is met, from each of the plural distribution data communication devices, a communication status data set indicating a communication speed at which the plural distribution data communication device communicates with each of its counter parties, and a stored data volume data set indicating a volume of data that is at least a part of the data to be distributed and is stored in the distribution data communication device,
• a determining unit that determines, each time a predetermined condition is met, for each of the plural distribution data communication devices, one or more communication parties from among the plural distribution data communication devices based on the communication status data sets and the stored data volume data sets received by the receiving unit in accordance with a predetermined rule, and
• a transmitting unit that transmits to each of the plural distribution data communication devices a communication party data set indicating one or more communication parties of the distribution data communication device determined by the determining unit;
• each of the plural distribution data communication devices comprises
• a receiving unit that receives from the management data communication device a communication party data set indicating one or more communication parties of distribution data communication device,
• a transmitting unit that transmits data to the management data communication device,
• an instructing unit that performs at least one of an instruction to the receiving unit of the distribution data communication device to receive at least a part of the data to be distributed from one or more communication parties indicated by the communication party data set received by the receiving unit of the distribution data communication device and an instruction to the transmitting unit of the distribution data communication device to transmit at least a part of the data to be distributed to one or more communication parties indicated by the communication party data set received by the receiving unit of the distribution data communication device,
• a storing unit that stores at least a part of the data to be distributed received by the receiving unit of the distribution data communication device, and
• a generating unit that generates a stored data volume data set indicating a volume of data that is at least a part of the data to be distributed and is stored in the storing unit of the distribution data communication device, and a communication status data set indicating at least one of a communication speed at which the transmitting unit of the distribution data communication device transmitted at least a part of the data to be distributed to each communication party in accordance with the instruction performed by the instructing unit and a communication speed at which the receiving unit of the distribution data communication device received at least a part of the data to be distributed from each communication party in accordance with the instruction performed by the instructing unit;
• and
• the transmitting unit of each of the plural distribution data communication devices transmits to the management data communication device, each time a predetermined condition is met, the communication status data set and the stored data volume data set generated by the generating unit.

A data communication device comprising:

• a receiving unit that receives, from a management data communication device that manages paths of data to be distributed that is transmitted and received among plural data communication devices, a communication party data set indicating one or more communication parties,
• a transmitting unit that transmits data to the management data communication device,
• an instructing unit that performs at least one of an instruction to the receiving unit to receive at least a part of the data to be distributed from one or more communication parties indicated by the communication party data set received by the receiving unit and an instruction to the transmitting unit to transmit at least a part of the data to be distributed to one or more communication parties indicated by the communication party data set received by the receiving unit,
• a storing unit that stores at least a part of the data to be distributed received by the receiving unit, and
• a generating unit that generates a stored data volume data set indicating a volume of data that is at least a part of the data to be distributed and is stored in the storing unit, and a communication status data set indicating at least one of a communication speed at which the transmitting unit transmits at least a part of the data to be distributed to each communication party in accordance with the instruction performed by the instructing unit and a communication speed at which the receiving unit received at least a part of the data to be distributed from each communication party in accordance with the instruction performed by the instructing unit,
• wherein:
• the transmitting unit transmits to the management data communication device, each time a predetermined condition is met, the communication status data set and the stored data volume data set generated by the generating unit.

A program stored on a non-transitory computer readable medium for causing a computer having a communication unit for communicating with one or more data communication devices to execute:

• receiving, from a management data communication device that manages paths of data to be distributed that is transmitted and received among plural data communication devices, a communication party data set indicating one or more communication parties,
• performing at least one of transmission of at least a part of the data to be distributed to one or more communication parties indicated by the received communication party data and reception of at least a part of the data to be distributed from one or more communication parties indicated by the received communication party data,
• storing the received at least a part of the data to be distributed, and
• generating a stored data volume data set indicating a volume of data that is at least a part of the data to be distributed and is stored,
• generating a communication status data set indicating at least one of a communication speed at which transmission of at least a part of the data to be distributed to each communication party was performed and a communication speed at which reception of at least a part of the data to be distributed from each communication party was performed, and
• transmitting, to the management data communication device, each time a predetermined condition is met, the generated communication status data set and the generated stored data volume data set.