Patent ID: 6628611
Filing Date: 2003-09-30
Classification: H04L

Abstract:
A traffic control method comprising the steps of:a) assigning a first transfer rate to a first user terminal in response to a call request from the first user terminal requesting a variable-rate mode of transfer over a transmission link; b) defining a relationship between identity of said first user terminal indication of said variable-rate mode of transfer and the assigned first transfer rate in a first entry of a memory; c) determining from contents of said memory a remaining capacity of said transmission link in response to a call request from a second user terminal requesting a constant-rate mode of transfer over the transmission link and comparing the remaining link capacity with a second transfer rate requested by the second user terminal; d) if the second transfer rate is equal to or smaller than said remaining link capacity, assigning said second transfer rate to the second user terminal; e) defining a relationship between identity of said second user terminal, indication of said constant-rate mode of transfer and the assigned second transfer rate in a second entry of said memory; f) if said second transfer rate is greater than said remaining link capacity, making a search through said memory for an entry containing a user terminal whose mode of transfer is variable-rate and whose transfer rate can be reduced; g) if said entry is detected by the step (f), reassigning a third transfer rate lower than the first transfer rate to said first user terminal and updating said first entry of said memory, and returning to the step (c); and h) if said entry is not detected by the step (f), rejecting the request from said second user terminal.