Buffering of data for transmission in a computer communication s

Details Buffering of data for transmission in a computer communication s Buffering of data for transmission in a computer communication s

1995-07-07

1997-09-02

Lim, Krisna

395284, G06F 1300

Patent

active

056641168

ABSTRACT:
A transmission data buffer and method for buffering data to be transmitted from a host computer to an asynchronous transfer mode (ATM) telecommunications network. The transmission data buffer comprises a plurality if FIFO memories, one for each channel which is established on the connection to the ATM network. A load engine loads packets of data (e.g. AAL5, AAL5-MPEG, TCP packets) into particular FIFO memories in the transmission buffer according to a load schedule queue. The data is removed from the FIFO memories by an unload engine according to entries in a bandwidth group table. The unload engine segments the data as it is removed from the FIFOs, by removing one ATM cell payload (48-bytes) at a time, and adds the ATM cell header data. The unload engine can also generate AAL5 packet CRC fields and add a control and length field to the cell data segmented from an AAL5 packet. The transmission buffer memory includes at least one tag bit for each data word which is set to indicate the beginning and end of packets in the FIFO memories.

REFERENCES:
patent: 5274768 (1993-12-01), Traw et al.
patent: 5471586 (1995-11-01), Sefidvash et al.

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