| 摘要 |
An information processing system, which has a computer, scanning apparatus, and printing apparatus using an IEEE 1394 bus as a communication interface, searches for an available channel in order to assign a predetermined number of channels to an apparatus having operation priority. When no available channel is found by the search, the system determines whether any of channels allocated by an other apparatus can be reassigned to the high-priority apparatus. If any channels are determined to be reassignable, the system reassigns the channels to the high-priority apparatus. This makes it possible to flexibly assign channels in an isochronous transfer serial bus and transfer information desired by the user.
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