H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
344/51
H04Q 3/42 (2006.01) H04L 12/56 (2006.01)
Patent
CA 2022798
ABSTRACT COMMUNICATION SWITCHING ELEMENT AND METHOD FOR TRANSMITTING VARIABLE LENGTH CELLS The switching element is used for transferring, between X inputs (Il- IX) and Y outputs (Ol- OY), cells divided into subcells of which only the first contains information about the destination output(s) of the cell. This switching element includes: - a buffer memory (BM) with a plurality (C) of memory locations each having an address (K); and - a memory management means (BMMU) for providing (FMLMC) addresses of free memory locations for storing the subcells therein, and for storing (BQl- BQY, SLM), under the form of linked lists, the memory location addresses used by the subcells, each list being associated to a distinct cell. The method is adapted to process variable length cells divided into subcells each containing a header (SCH) to distinguish a first/ last subcell (FSC/ LSC) of a cell from other subcells (ISC, LSC). Use is made of a subcell logic (SL) to detect the succession in either order of a subcell pertaining to a cell and of either a first/ last subcell (FSC/ LSC) of another cell or an idle subcell so as to identify the last/ first subcell (LSC/ FSC) of a cell.
Alcatel N.v.
Smart & Biggar
LandOfFree
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