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Synchronous bandwidth allocation in FDDI networks

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2 Author(s)
Zin Zheng ; Mitsubishi Electr. Res. Labs. Inc., Cambridge Res. Center, MA, USA ; Shin, K.G.

It is well known that an FDDI token ring network provides a guaranteed throughput for synchronous messages and a bounded medium access delay for each node/station. However, this fact alone cannot effectively support many real-time applications that require the timely delivery of each critical message. The reason for this is that the FDDI guarantees a medium access delay bound to nodes, but not to messages themselves. The message-delivery delays may exceed the medium-access delay bound even if a node transmits synchronous messages at a rate not greater than the guaranteed throughput. We solve this problem by developing a synchronous bandwidth allocation (SEA) scheme which calculates the synchronous bandwidth necessary for each application to satisfy its message-delivery delay requirement. The result obtained in this paper is essential for effective use of the FDDI token ring networks in supporting such real-time communication as digital video/audio transmissions, and distributed control/monitoring

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Parallel and Distributed Systems, IEEE Transactions on  (Volume:6 ,  Issue: 12 )