Patent ID: 7689697

Claim:
A server communicably linked to a device through a network, comprising: designation means for designating a first time interval (T 1 ) during which the device repeatedly reconnects the server, and a second time interval during which the device connects to the server for the first time, the first time interval and the second time interval are determined based on a number of times of a connection error between the server and the device, the first time interval being longer than the second time interval; and transmission means for transmitting information corresponding to the designated first time interval to the device while the server is being connected to the device, and for transmitting information corresponding to the designated second time interval to the device along with the information corresponding to the designated first time interval while the server is being connected to the device, wherein when a connection error between the server and the device occurs, the device periodically reconnects to the server during the first time interval according to new time interval T 1 −tr 1 +tr 2 , where T 1 is the first time interval, tr 1 is a random number assigned to the second time interval, and tr 2 is a random number assigned to the first time interval.