Patent ID: 8732235

Claim:
A relay server for relaying information delivered from an information delivery server as off-line data to mobile terminals, comprising: a memory; and a processor that executes a procedure in the memory, the procedure including: determining an update frequency of information for each of the mobile terminals based on display situation data of information received from a mobile terminal; determining whether to create off-line data to be transmitted for each of the mobile terminals based on the update frequency of the determined information and creating off-line data to be transmitted to the mobile terminal from the information delivered from the information delivery server when said determining indicates that the off-line data is to be created for the mobile terminal; transferring an update date and time of the information, the update frequency of the information and the created off-line data to the mobile terminal; and determining a degree of importance per region of the information based on display situation data per region of the information received from the mobile terminal, the degree of importance determined for each of the mobile terminals, and wherein the determining of the update frequency determines the update frequency of the information for each of the mobile terminal based on display situation data of the information received from the mobile terminal when an update is detected in a region where the degree of importance of the information delivered from the information delivery server is equal to or greater than a threshold based on the degree of importance per region of the information determined.