Traffic control method, network system and frame relay switch

Claim 1

A frame relay switch in plural frame relay networks in a network system comprising an ATM (Asynchronous Transfer Mode) network, said plural frame relay networks respectively connected to the ATM network through channels and provided with plural frame relay switch, and plural terminals respectively connected to the plural frame relay networks through channels, said frame relay switch comprising: data quantity measurement means for measuring a data quantity transmitted through each channel; restrictive level operation means for operating a traffic restrictive level corresponding to the data quantity measured by said data quantity measurement means; restrictive process storage means for storing a traffic restrictive process corresponding to the traffic restrictive level operated by said restrictive level operation means; traffic control means for reading the traffic restrictive process corresponding to the traffic restrictive level operated by said restrictive level operation means and performing the traffic restrictive process read from said restrictive process storage means; restrictive class storage means for storing a traffic restrictive class set for each channel transmitting data from the plural frame relay network to the ATM network, wherein said traffic control means read the traffic restrictive class from said restrictive class storage means, detect the traffic restrictive process stored correspondingly to the traffic restrictive class read from said restrictive process storage means and the traffic restrictive level operated by said restrictive level operation means, and performs the traffic restrictive process which is detected.