Multiplex communications – Data flow congestion prevention or control – Control of data admission to the network
Patent
1994-01-05
1997-06-03
OIms, Douglas W.
Multiplex communications
Data flow congestion prevention or control
Control of data admission to the network
370236, 370397, 370468, H04J 322
Patent
active
056362129
ABSTRACT:
In an ATM network using a burst-level band-width allocation, a source terminal reserves, before a burst transmission, band-widths according to a peak rate of the burst and then sends the burst therethrough. When the transmission is finished, the band-widths are released. Where there exists a link to which the peak rate is not assigned, a non-reserving acknowledgement signal (NACK) is sent to the terminal and the reserved band-widths are released. On receiving the NACK, the terminal allocates a band-width with peak rate lower than that of the first request after a back-off time has elapsed, thereby minimizing the probability of a blocked transmission. The source terminal declares a minimum band-width together with the peak rate (maximum band-width) in the band-width request operation. Each node allocates the peak rate when the remaining band-width of a link controlled by the node is sufficient to allocate the peak rate. Even if the remaining band-width is insufficient, when the band-width is not less than the minimum band-width, there is allocated a band-width equal to or more than the minimum band-width and equal to or less than the peak rate according to the remaining band-width, thereby transferring the burst.
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IEEE International Conference on Communications: vol. 2 of 4, 15 Apr. 1990, Atlanta pp. 439-442 XP000169724 Wang et al. `Bandwidth Allocation for ATM Networks` *p. 440, left column, line 34--right column, line 42*.
Hom Shick
NEC Corporation
OIms Douglas W.
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