US 5,313,458 AGranted

Traffic control system

AssigneeFujitsu Limited

InventorHiroyuki Suzuki

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Abstract

To suppress the amount of data frames passing through a public network and to provide advantages for both the telephone company and subscribers, a traffic control system is provided for controlling traffic in data frames transmitted between a public network and a subscriber through channels. Each data frame consists of a header and a payload. The header includes a predetermined bit indicating whether or not the payload includes traffic data. The system comprises, between the public network and the subscriber, a traffic control unit that includes channel filters each for receiving data frames from the subscriber through the corresponding channel, and for transmitting each data frame to the public network only when the predetermined bit in the header of the data frame indicates that the payload includes traffic data, and a channel reproducing unit for receiving data frames from the public network, and for reproducing an omitted data frame that has been discarded, to transmit the received data frames and the reproduced data frame to the subscriber.

Claims10

Dependent claims

A traffic control system for controlling traffic in data frames transmitted between a public network and a subscriber through a plurality of channels;

each of said data frames consisting of a header and a payload;
said header including a predetermined bit indicating whether or not said payload includes traffic data,
said traffic control system comprising, between said public network and said subscriber, a traffic control unit;
said traffic control unit comprising:
a plurality of channel filters each for receiving said data frames from said subscriber through the corresponding channel, and for transmitting to said public network only the data frames in which said predetermined bit in said header thereof indicates that said payload includes traffic data and discarding the data frames in which said predetermined bit indicates that said payload does not include traffic data;
and
a channel reproducing unit for receiving data frames from said public network, and for generating a discarded empty data frame when said reproducing what does not receive a data frame from a corresponding channel, to transmit the data frames received from said public network and the data frame generated in said reproducing unit to said subscriber.

4 more elements

Dependencies are inferred from the claim text.