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Configurable gigabits switch adapter

  • US 5,311,509 A
  • Filed: 02/06/1992
  • Issued: 05/10/1994
  • Est. Priority Date: 09/13/1991
  • Status: Expired due to Term
First Claim
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1. In a data transmission system, a method for transforming fixed length cells, each cell having a payload, into user frames, each of said fixed length cells being preceded by a fixed size header, the payload and said fixed size header of each of said fixed length cells being processed separately, said method comprising the following steps:

  • receiving said fixed length cells,feeding said fixed length cells in parallel into a parallel bus (54),separating said payload of the fixed length cell from said fixed size header, said payload being transmitted along said parallel bus (54) via a realignment unit (47) to a buffer memory (52),processing said fixed size header separately to determine a storage address of a storage section in said buffer memory (52),shifting said payload to the boundary of said parallel bus by means of said re-alignment unit (47),buffering said payload in said storage section in said buffer memory (52) made accessible by said storage address after being shifted to the bus boundary,supporting at least one virtual channel by employing a control section corresponding to said virtual channel, said control section comprising queuing means whereby the storage addresses of the storage sections in said buffer memory (52) which have been allocated by said virtual channel are stored, the buffered payload of said virtual channel being accessible by reading said storage addresses from said buffer memory (52).

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