| 摘要 |
A cell based network (100) for transmitting ATM user cells (118), including ABR data cells (118D) and forward control, or RM, cells (118FRM) at predetermined cell rates from at least one user source (102) in a virtual connection (VC, 110) through at least one ATM switch (120) and at least one transmission link (130) in the network to at least one user destination (104), employs a method and apparatus for controlling a user source (102) transmission cell rate in the presence of congestion in the VC (110). The calculation of a Fair Share cell transmission rate is written into a backward control, or RM, cell (118BRM) optionally takes place only in the presence of congestion at an ATM Switch (120). The calculation of the Fair-Share value is simplified and calculation time is shortened by changing the number of active ABR VCs (NABR) to a factor of two (ENABR) and dividing the maximum cell transmission rate by ENABR.
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