| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a communication technology for making retransmission of data into necessary minimum to increase efficiency in one-to-many communication based on multicast. <P>SOLUTION: A request processing part 301 receives a processing request from an acceptance server 200 and transmits a processing result of an image processing part 304 to the acceptance server 200 by a TCP. A data receiving part 305 stores image data to be processed transmitted by the multicast of a UDP from the acceptance server 200 in a data accumulation part 303 by block. A reception completion determination part 306 determines reception completion of each block. The image processing part 304 uses a block to be processed of the image data to be processed to execute processing. A retransmission request part 307 transmits, when it is determined that reception is not normally completed for the block to be processed when the image processing part 304 executes the processing, a retransmission request to the acceptance server 200 by the TCP, and receives the block transmitted according to the retransmission request. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
