ABSTRACT
This chapter focuses on the designing issues with relation to efficiency, capability to meet quality of service (QoS) requirements, and fairness in wide and metropolitan area networks. The approaches presented in the chapter are based on control theory, which successfully fulfil the aim of meeting efficiency, fairness, and spatial reuse requirements of a general network with ring topology. Using control theory, the negative effect of oscillations by designing a rate controller is reduced where the control parameters are selected to maintain stability. The chapter discusses the bandwidth allocation approach among the flows. It deals with a new fair weight function for each flow. The chapter proposes the adaptive bandwidth allocation (ABA) algorithm and the corresponding implementation method. The chapter discusses a simple model to illustrate how the proposed ABA algorithm can be applied to RPR networks. ABA algorithm is based on the proportional-derivative (PD) control approach and also provides general weighted (GW) fairness.
