Method and system for matching packet size for efficient transmi

Details Method and system for matching packet size for efficient transmi Method and system for matching packet size for efficient transmi

1994-09-27

1998-01-06

Harvey, Jack B.

Multiplex communications

Wide area network

Packet switching

39520013, 370476, 370506, G06F 1338

Patent

active

057064393

ABSTRACT:
A computer system that is able to specify a packet size transmission rate is disclosed. The computer system has a plurality of nodes, each node being serially connected on a P1394 bus to at least one other node in the computer system. The nodes communicate one to another by transmitting communication packets having variable byte sizes over the P1394 bus. The packet size transmission rate is specified by first establishing an average transmission of bytes per packet. Next, the system determines an approximate value of the average transmission rate and, based on this value, determines a periodic change on the average transmission rate for transmitting communication packets of length l or length l+1. Once the periodic change is understood, the system selects a repeating pattern for generating a sequence of packets representing this approximate value. This sequence allows for an even transmission distribution of l and l+1 packets. The system bases its selection on checking the repeating pattern to determine whether the transmission rate should change from l to l+1 or vice versa and changing the transmission rate upon indication that a change is necessary.

REFERENCES:
patent: 5058108 (1991-10-01), Mann et al.
patent: 5323396 (1994-06-01), Lokhoff
patent: 5353287 (1994-10-01), Kuddes et al.
patent: 5469549 (1995-11-01), Simpson et al.
"IEEE Standard for a High Performance Serial Bus", The Institute Of Electrical And Electronic Engineers, Inc., Draft 7.1v1, IEEEP1394, Aug. 5, 1994.
Marazas, et al., "Information Technology--SCSI-3 Serial Bus Protocol (SBP)", X3T10 992D, Rev. 18, Working Draft, Aug. 11, 1994.

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