Data delivery system, control server, and data delivery method

A control server comprising:

• a CPU including:
• a receiving unit receiving an acquisition request including identification information of a communication apparatus and requesting update data from the communication apparatus;
• a determining unit determining whether or not there is update data corresponding to the communication apparatus based on the identification information when the acquisition request is received by the receiving unit;
• and
• a delivery requesting unit requesting a delivery server which stores the update data to deliver the update data when there is update data corresponding to the communication apparatus,
• wherein when the response message is received by the receiving unit, the delivery requesting unit requests the delivery server to acquire processing load of the delivery server to be applied upon delivery of the update data,
• the control server compares the processing load of the delivery server, which is applied upon delivery of the update data, with a pre-set value, and when the control server determines that the processing load of the delivery server to be applied upon delivery of the update data is less than the pre-set value, the delivery requesting unit of the control server requests the delivery server to deliver the update data to the communication apparatus from which the response message is received.

A data delivery method in a data delivery system which comprises a plurality of communication apparatuses and a control server selecting a communication apparatus to which update data is to be delivered from among the plurality of communication apparatuses,

• the data delivery method comprising:
• a selecting step of selecting at the control server, the communication apparatus to which the update data is to be delivered based on priority levels set in association with communication apparatuses which are delivery targets;
• a transmitting step of transmitting by a transmitting unit, a message inquiring as to whether or not the communication apparatus is ready to accept the update data, to the selected communication apparatus;
• a receiving step of receiving at a receiving unit, a response message transmitted by the communication apparatus in response to the message transmitted by the transmitting unit;
• and
• a delivery requesting step of selecting the communication apparatus to which the update data is to be delivered based on the response message received at the receiving unit and requesting a delivery server which stores the update data to deliver the update data to the selected communication apparatus,
• wherein when the response message is received by the receiving step, the delivery requesting step requests the delivery server to acquire processing load of the delivery server to be applied upon delivery of the update data,
• further comprising:
• a comparing step comparing the processing load of the delivery server, which is applied upon delivery of the update data, with a pre-set value, wherein
• when the comparing step determines that the processing load of the delivery server to be applied upon delivery of the update data is less than the pre-set value, the delivery requesting step requests the delivery server to deliver the update data to the selected communication apparatus from which the response message is received.

A data delivery method in a control server which includes a CPU, the data delivery method comprising:

• a receiving step of receiving an acquisition request including identification information of a communication apparatus and requesting update data from the communication apparatus;
• a determining step of, when the acquisition request is received in the receiving step, determining whether or not there is update data corresponding to the communication apparatus based on the identification information;
• and
• a delivery requesting step of, when there is update data corresponding to the communication apparatus, requesting a delivery server which stores the update data to deliver the update data,
• wherein when the response message is received by the receiving step, the delivery requesting step requests the delivery server to acquire processing load of the delivery server to be applied upon delivery of the update data,
• further comprising:
• a comparing step comparing the processing load of the delivery server, which is applied upon delivery of the update data, with a pre-set value, wherein
• when the comparing step determines that the processing load of the delivery server to be applied upon delivery of the update data is less than the pre-set value, the delivery requesting step requests the delivery server to deliver the update data to the communication apparatus from which the response message is received.