Fair access of multi-priority traffic to distributed-queue dual-bus networks

Abstract From the Canadian patent

Bandwidth balancing is accomplished in Distributed-Queue Dual-Bus (DQDB) networks that handle multi-priority traffic by causing each node to throttle its own rate of transmission in accordance with the priority of the data that the node transmits. In accordance with one approach, each node limits its throughput to the product of a bandwidth balancing factor (which is a fraction that varries according to the priority level of data) and the unused bus capacity. When parcels of different priorities are received within each node, the parcels are processed in priority order. In accordance with another approach, all active parcels within a node are handled concurrently and receive some bandwidth. …