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专利名称：Apparatus and method for processing
asynchronous transfer mode cells
发明人：I. C. Keith Wilkinson,Jonathan R. Pearce申请号：US08/339301申请日：19941114公开号：US05495478A公开日：19960227
摘要：Egress processing of asynchronous transfer mode (ATM) cells is performed byan egress processor (18) that receives ATM cells from an ingress processor (16) througha cell bus (20). ATM cells are received in the egress processor (18) through an egressFIFO buffer (32) and placed within available space in an ECELL memory (38) through asingle cell FIFO buffer (34) as controlled by a cell loader (36). A linker (44) chainstogether ATM cells, no matter where they are located in the ECELL memory (38),corresponding to a particular call into a specific packet by placing pointer informationwithin each ATM cell of a specific packet such that each ATM cell points to the next ATMcell within the packet. The linker (44) places the cell location of the first cell of thepacket into a packet FIFO buffer (52) of a cell location buffer (48). An unlinker (46) usesthe cell location within the packet FIFO buffer (52) to transmit ATM cells from the ECELLmemory ( 38) to an egress line interface (22) according to the pointer information placedby the linker (44) into each ATM cell. When the unlinker (46) is ready to transmit ATMcells from the ECELL memory (38) before the linker (44) has finished chaining together apacket, the linker (44) places the cell location information directly into a cell FIFO buffer(50) within the cell location buffer (48) instead of within each ATM cell for immediate use
by the unlinker (46).
申请人：DSC COMMUNICATIONS CORPORATION
代理机构：Baker & Botts
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