Fairness by demand and service pattern match: the alpha tuning mechanism for DQDB MANs

This paper proposes a dynamic bandwidth control scheme for the distributed queue dual bus (DQDB) networks. The heavy load unfairness is effectively addressed. The match of demand and service patterns is achieved at fairly uniform delays and success rates of transmission at every node. Using a tunable parameter (/spl alpha/), the proposed scheme perceives the presence of several fictitious nodes at the end of the bus and applies access protection. Analysis and simulation studies for three standard load patterns, viz., symmetric, asymmetric and equal probability loads, show that it outperforms the bandwidth balancing mechanism.