Variable control and data rates in highly efficient multiplexer

Details Variable control and data rates in highly efficient multiplexer Variable control and data rates in highly efficient multiplexer

H - Electricity

04

J

363/17

H04J 3/06 (2006.01) H04J 3/12 (2006.01) H04J 3/16 (2006.01)

Patent

CA 1265270

ABSTRACT Methods and apparatuses for efficiently allocating bandwidth to data, control and multiplexer overhead and for providing flexible data rates and control rates are provided. The apparatuses of the invention are used in a time division multiplexer which multiplexes for transmission over and for receipt from at least one aggregate line in accord with at least one frame, data and control information from a plurality of channels and multiplexer overhead information. The apparatuses generally comprise: means for determining the requested data transmission rates for each of said data channels and said aggregate line; means for determining the requested control transmission rates for each of said data channels; means for summing the total of said requested data transmission rates to produce a first total, for summing the total of said requested control transmission rates and said overhead signal rates to produce a second total, and for summing said first and second totals: comparison means for determining whether the sum of said first and second totals exceeds the determined transmission rate of said aggregate line; means for decreasing the data rate allocated to at least one data channel thereby changing said first total, to ensure that said aggregate line transmission rate is at least equal to the sum of said first and second totals; and means for setting the average rate of one of a group of clocks comprising a transmit and a receive clock of at least one of said channels equal to the requested data transmission rates of that channels decreased by rates dictated by said means for decreasing the allocated data rate.

539714

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