Communication apparatus for transmitting frames and priority control method for transmitting frames
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United States of America Patent
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Nov 11, 2008
Grant Date -
Oct 20, 2005
app pub date -
Mar 3, 2005
filing date -
Mar 15, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Frames of different priority levels are queued in a plurality of queues, e.g., first priority queue, second priority queue and third priority queue. If it is judged that a lower priority frame can be completely transmitted by the timing of transmitting a higher-priority frame based on the frame length, the lower-priority frame is transmitted, and otherwise, the lower-priority frame is not transmitted. Accordingly, frame transmission control that is applicable to fixed-length frames and variable-length frames is realized in a frame scheduler for an apparatus having a function of outputting frames. Also, priority-based control of frames which is suitable for a layer 2 switch or the like and which is adaptable to processing in a high-speed network is realized without providing an IP fragment.
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