| 摘要 |
Header information of a cell received by a cell reception buffer is converted into a numerical value, which is then stored in a header information memory. Simultaneously, the content of a writing pointer is added successively to the contents of the window size registers of a window size register group by an adder whose output data are used as reading data to read header information of cells corresponding to terminal ends of sliding windows from the header information memory. The contents of cell counters corresponding to the read cells are decremented by 1 only if the read header information is not equal to the header information of the received cell and if their window sizes coincide with each other. The content of a cell counter corresponding to the received cell is incremented by 1 only if the read header information is not equal to the header information of the received cell.
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