Analysis of the optimality of a multi-level bandwidth-negotiation algorithm for FDDI interconnection across B-ISDN

The optimality of a dynamic adaptive bandwidth allocation mechanism on the inter-FDDI virtual circuits is analyzed. The proposed algorithm is based on the monitoring of InterWorking Unit buffer status and the request of quanta of bandwidth as the buffer content exceeds given thresholds. By using the analytical model proposed, the analysis of N-level bandwidth quantization algorithm performance can be carried out. The results, validated by simulation, allow comparison between three-level and two-level algorithms. The three-level algorithm shows a better response to statistical fluctuations of input traffic, while offering a better grade of service