System for synchronous bandwidth allocation in token ring networ

Details System for synchronous bandwidth allocation in token ring networ System for synchronous bandwidth allocation in token ring networ

1993-07-30

1995-02-14

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 941, 3701001, H04J 302

Patent

active

053901827

ABSTRACT:
A system is provided for generating the minimum synchronous bandwidth allocation h.sub.i for token ring networks in which this minimum bandwidth allocation is utilized by the node to request appropriate synchronous bandwidth reservation from the network manager. This permits the synchronous bandwidth allocation h.sub.i to be set dependent upon the minimum message generation period, T, the maximum message transmission time, C, the requested message delivery delay bound, d, and the target token rotation time of the network, TTRT. The system is not limited to d=T as is common in prior systems, but rather accommodates any value of d. As a result, the system is both simpler to implement, and covers many more applications having different message delivery time constraints. The calculation of h.sub.i is done by ensuring that the time that a node is allowed to transmit messages in the worst-case is no smaller than the time that the node needs to satisfy the message delivery time constraints.

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