PURPOSE: To secure the communication quality of the ATM network even in the case of non-coincidence of an actual parameter at the time of discriminating whether a call should be accepted or not based on the traffic parameter reported by a user. ;CONSTITUTION: A maximum number (Ri) of arriving cells which arrive in the time required for sending of γ cells and an average number (Ai) of these cells are calculated in accordance with the peak cell rate and the average cell rate reported by the user in the ATM network, and numbers Ri and Ai of cells are used to calculate the upper limit value of the cell loss rate of VP, and it is discriminated whether a call should be accepted or not based on this upper limit value. In this ATM call acceptance control system, an average arriving cell number conversion part 11 is provided which converts the average number Ai of arriving cells to the value of '(Rj)2/γ' in the case of (Rj)2/Aiγ, and the calculated average number Ai of arriving cells is used to calculate the upper limit of the cell loss rate of VP for each user in the case of (Rj)2/Ai≤γ, and the convered average number (Rj)2/γ of arriving cells is used to calculate it in the case of (Rj)2/Aiγ.;COPYRIGHT: (C)1995,JPO
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