H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 29/08 (2006.01) H04L 12/56 (2006.01) H04L 25/45 (2006.01) H04L 27/06 (2006.01) H04L 29/06 (2006.01) H04N 7/66 (2006.01) H04L 7/04 (2006.01) H04N 7/167 (2006.01) H04N 7/24 (2006.01) H04N 7/52 (2006.01)
Patent
CA 2174988
A data communications protocol for single path media having low data error rate requires the generation of a data packet with a start code field having a predetermined pattern, a byte count field for defining a data field having a maximum predetermined length in bytes, a data payload field having a byte count according to the value of the byte count field and a cyclic redundancy check field of predetermined length. The value of the byte count field may be fixed, may be changed from packet to packet or may be changed upon intialization. The described data communications protocol permits utilization with data types varying from high definition television to alarm reporting applications. Moreover, the data rate may be varied by varying an idle time signal duration up to a maximum (when the idle time signal duration isreduced to zero). According to one exemplary embodiment for plastic fiber optic media, MPEG2 transport stream packets may be transmitted at 54 Mbaud over distances of 20 meters or even more with other media.
Cannella James E. Jr.
Gowling Lafleur Henderson Llp
Scientific-Atlanta Inc.
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