Local synchronous bandwidth allocation in a token ring network

Details Local synchronous bandwidth allocation in a token ring network Local synchronous bandwidth allocation in a token ring network

1992-09-22

1994-05-17

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 855, 34082505, H04J 316

Patent

active

053134664

ABSTRACT:
A method for real time message transmission in a token ring network is provided. The method initializes each node in the network, including setting a maximum message transmission time H.sub.i for node i such that ##EQU1## where C.sub.i is the transmission time of a message in a message stream, P.sub.i is the period length of the message stream, and a is a non-negative constant between zero and one. The messages are then transmitted when a token arrives at a node for the duration of H.sub.i. Using this method with the timed token protocol, the synchronous messages are guaranteed to be transmitted before their deadlines if the utilization of synchronous messages is no more than ##EQU2## of available utilization.

REFERENCES:
patent: 5155725 (1992-10-01), Khalil
patent: 5191580 (1993-03-01), Nakano et al.
"Guaranteeing Synchronous Message Deadlines with the Timed Token Protocol" by Gopal Agrawal, Biao Chen, Wei Zhao and Sadegh Davari, IEEE International Conference on Distributed Computing Systems, dated Jun. 1992.

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