Antonelli, Terry, Stout & Kraus
Method and system for packet exchange
 In a packet exchange system for preforming packet exchange by setting logical channels, individual input packets are assigned with information indicative of input sequence of the individual input packets counted in each call and the input sequence information is stored. Each time each packet is delivered, the input sequence information assigned to an input packet is stored as an output sequence information in a call to which the delivered packet belongs, and the status of congestion of packets of the call which are present in the exchange is decided on the basis of the stored input sequence information and output sequence information. This system further includes a rerouting circuit having buffer function and a control device for changing the contents of a conversion table when it detects by looking up the conversion table that the number of packets remaining in the exchange which are destined for a specified output line exceeds a predetermined threshold, whereby input packets scheduled to be destined for the specified output line are temporarily stored in the rerouting circuit. 
Hitachi, Ltd.
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Noboru Shinobu Takahiko Hiroshi Kenichi
Endo Gohara Kozaki Kuwahara Ohtsuki