H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
344/25
H04Q 11/04 (2006.01) H04L 12/56 (2006.01) H04Q 7/28 (2006.01) H04Q 7/22 (2006.01)
Patent
CA 2034935
A system for the transmission of data packets of mutually equal durations from a plurality of substations to a main station via one or more transmission channels, the main station comprising transmission means for transmitting on each transmission channel a synchronising signal which indicates the beginning of a frame, programmable memory means for storing, in respect of each transmission channel, a maximum link establishment time and a maximum link disestablishment time both of which being a characteristic of the transmission channel from the substations to the main station, the substations each comprising programmable memory means for storing said maximum link establishment times and said maximum link disestablishment times, means which on reception of the synchronising signal on a transmission channel subdivide the frame into a number of consecutive time slots of mutually equal durations at least equal to the sum of the duration of a said data packet, said stored maximum link establishment time and said stored maximum link disestablishment time of that transmission channel, means for transmitting a said data packet, if so desired, by selecting a time slot from the sequence of time slots and transmitting the data packet within a period within the selected time slot, the period beginning at a time equivalent to said stored maximum link establishment time of that transmission channel after the beginning of the selected time slot and ending at a time equivalent to said stored maximum link disestablishment time of that transmission channel before the end of the selected time slot.
Fetherstonhaugh & Co.
Koninklijke Philips Electronics N.v.
N.v. Philips Gloeilampenfabrieken
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