Data processing system and data processing method

A method for distributing advertisement data to display terminal devices from a distribution server via a relay server, comprising:

• the relay server receiving status notifications of the display terminal devices from the display terminal devices and, on receipt of the status notifications, transmitting a tenor of receipt of the status notifications to the display terminal devices;
• the distribution server receiving status notifications including the status of the display terminal devices from the relay server and, on receipt of the status notifications, transmitting the tenor of receipt of the status notifications to the relay server,
• the distribution server receiving, from a reproduction schedule storage unit, a reproduction schedule indicating at least a reproduction time of the advertisement data, the distribution server determining whether the reproduction schedule has been changed with respect to a previously received reproduction schedule, and if it is determined the reproduction schedule has been changed, the distribution server transmitting a notification on the change of the reproduction schedule, along with the tenor of receipt of the status notification, to the relay server,
• wherein if, after transmitting the notification on the change of the reproduction schedule, the distribution server receives a request for acquisition of the as-changed reproduction schedule, from the relay server, the distribution server sends the as-changed reproduction schedule to the relay server,
• wherein if the relay server determines that the reproduction schedule acquired from the distribution server has been changed, the relay server transmits the notification on the change of the reproduction schedule, along with the tenor of receipt of the status notification, to the display terminal device, and
• wherein if, after sending the notification on the change, the relay server receives a request for acquisition of the as-changed reproduction schedule, the relay server sends the as-changed reproduction schedule to the display terminal device.