CBRMA++/SR: on the design of a MAN/WAN MAC protocol for high-speed networks

A new MAN/WAN medium-access control (MAC) protocol called CBRMA++/SR is introduced. It is suitable for a folded bus topology with optical fiber used as the transmission medium. The eminent features of CBRMA++/SR are total fairness and full bandwidth utilization. The preemptive approach employed in bandwidth allocation enables CBRMA+++/SR not to suffer from the deficiencies of DQDB, which stem mostly from the inconsistency of the distributed queue at a given instant. The protocol is based on the concept of fair share, which also provides a solid ground to support connection-oriented services. A powerful slot-reuse scheme complements the protocol.<
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