Ik Hyeon Jang  Yoon Seok Nam

Vol. 7,  No. 12, pp. 3933-3943, Dec.  2000
10.3745/KIPSTE.2000.7.12.3933

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The FR(Frame Relay) and the ATM specifications have different traffic control mechanisms with different traffic parameters, so the interworking between FR and ATM requires their traffic parameter mapping or translation to guarantee the quality of service for the end users across frame relay networks and ATM networks, and to utilize the network resources efficiently. In mapping methods, there are many parameters such as interworking methods of service interworking and network interworking, multiplexing methods to 1-to-1 and N-to-1 in network interworking. There are also several ATM transfer capabilities available such as CBR, VBRs, ABRs, GRF. The traffic parameters of the ATCs are concerned with CLP. Maximum bandwidth or peak cell rate of FR-to-ATM mapping may be described with access rate of frame relay subscriber or CIR+EIR of frame relay connection. ITU-T and ATM Forum proposed their own methods, but their applications are restricted to service interworking or network interworking. Some of ATM Forum equations are not applicable. Both methods just described the translation equations, but did not consider on the applications of real network. In this paper, we considered and compared the existing methods, and proposed our method applicable with flexibility and operability reflecting recent technologies. We also described some consideration on real network operations concerned with virtual AR, traffic bandwidth ratio, and so on.