H - Electricity – 04 – J
Patent
H - Electricity
04
J
H04J 3/16 (2006.01) H04B 1/66 (2006.01) H04L 12/56 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 2268550
An ATM cell constructor limits transmission-delay variations between successive cells of traffic of individual narrowband and wideband channels in a multi-channel environment. Whenever an ATM AAL1 layer of processing completes assembling an ATM cell payload for a narrowband channel, it increments a count that anticipates the number of ATM cells that will mature for transmission during the next cell construction period. For wideband channels, a function checks whether traffic from the number of narrowband channels that form the wideband channel will result in completion of assembly of that channel's cell payload during the next cell construction period; if so, the function increments the abovementioned count. The count is reset at the beginning of each cell construction period. Upon receipt of a command to add (start processing) a new channel, a TSI controller compares the count against a threshold that equals the total number of presently-active channels divided by the number of octets of traffic carried by each cell, plus one. If the threshold exceeds the count, the TSI controller sets up a TSI to start processing the new channel; otherwise the TSI controller delays setting up the TSI to process the new channel until occurrence of a cell construction period when the threshold exceeds the count. The net effect is to shift the delay variations from cells of active channels to the start-up of processing of new channels.
Kirby Eades Gale Baker
Lucent Technologies Inc.
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