| 摘要 |
A digital content downloading system is disclosed using a network in which digital content possessed by a digital content retailer (3a, 3b) is downloaded to one of a plurality of consumers (1a, 1b, 1c) through a network (21a, 21b, 21c). It comprises a plurality of subscriber lines which each are formed of an optical fiber and are arranged between the consumers (1a, 1b, 1c) and the network (21a, 21b, 21c) managed by a network operator (2a, 2b, 2c); an optical line terminator (24a, 24b, 24c) , arranged on a side of the network (21a, 21b, 21c) , for terminating one subscriber line on the network side; an optical network unit (13a, 13b), arranged on a side of each consumer (1a, 1b, 1c), for terminating one subscriber line on the consumer side; a star coupler (14) for connecting the subscriber lines terminated by the optical network units (13a, 13b) to the subscriber line terminated by the optical line terminator (24a, 24b, 24c); a resource reservation server (22) for reserving a particular bandwidth for the digital content in the subscriber lines in response to a request by a particular consumer (1a, 1b, 1c); and downward bandwidth managing means (241) arranged in the optical line terminator (24a, 24b, 24c), for controlling the downloading of the digital content from the digital content retailer (3a, 3b) to the optical network unit (13a, 13b) of the particular consumer (1a, 1b, 1c) to transmit the digital content through the subscriber lines and the star coupler ( 14) at the particular bandwidth reserved by the resource reservation server (22). |
