Token access controller protocol and architecture

Details Token access controller protocol and architecture Token access controller protocol and architecture

1983-03-10

1986-05-20

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

370 94, 34082552, 364200, H04Q 900, G06F 1300, G06F 1516

Patent

active

045904685

ABSTRACT:
Disclosed is a token access protocol for a local area network and the architecture for a token access controller to implement this protocol. The protocol provides for network initialization, recovery and addition of nodes to the network. The host of each node has a minimal involvement with maintaining the network and the protocol does not require the host processor to format frames for transmission. Data reception or transmission is facilitated through the use of a Direct Memory Access (DMA) so the host processor is freed to perform other tasks while data is being transmitted or received.

REFERENCES:
patent: Re31852 (1985-03-01), Soderblom
patent: 4441162 (1984-04-01), Lillie
patent: 4494185 (1985-01-01), Gunderson et al.
Electronics, Jan. 27, 1982, "Local Networks Will Multiply Opportunities in the 1980s", et al., pp. 89-99.
"Local Network Access Tradeoffs" by Mark Stieglitz, Oct., 1981, from Computer Design.
"Token Access Controller Minimizes Network Complexity", Mar., 1982, from Mini-Micro Systems.

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