Patent ID: 7346337
Filing Date: 2008-03-18
Classification: G06F

Abstract:
1. A communication terminal comprising: a time keeping unit operable to keep time; a storage unit; a processor operable to receive from a server a content, together with sending time information indicative of a time when the content was sent by the server, and time restriction information indicative of a time when the content can be used, the processor further operable to correlate and store the content, the sending time information, and the time restriction information in the storage unit; a time difference information calculation unit executable with the processor when the content is received, to calculate time difference information, the time difference information indicative of a time difference between the stored sending time information and a time of receipt of the content, the time of receipt of the content suppliable by the time keeping unit, the time difference information calculation unit further operable to store the time difference information in the storage unit in association with the content; a reference time calculating unit executable with the processor when the content is executed to calculate a usage determination reference time by adjustment of a time, indicated by the time keeping unit when the content is executed, by the time difference indicated by the time difference information; and a content usage determination unit executable with the processor to compare the usage determination reference time with a time indicated by the time restriction information, to determine whether the content can be further executed.