| 摘要 |
<p>PROBLEM TO BE SOLVED: To shorten the processing time by excluding redundancy of copy processing. SOLUTION: A cache memory 200a of a low-order layer stores received data in the unit of packets (1), a table generating means CCTC generates a cache management table CCT denoting cross reference between data copied to a buffer 300a of an application layer from the low-order layer with a packet on the cache memory 200a and stores it to a buffer 300 (2), after data processing, a difference information generating means DIFC uses the cross reference stored in the table CCT to generate information specifying a packet needing revision and different information DIF having a revised position and revised contents in the packet (3), an update section UPD of the low-order layer uses the difference information to update the packet stored in the cache memory 200a and the result of update is used for transmission data (4).</p> |
