Method for communicating data on a communication network by toke

Details Method for communicating data on a communication network by toke Method for communicating data on a communication network by toke

1986-01-13

1989-01-17

Griffin, Robert L.

Communications: electrical

Continuously variable indicating

With meter reading

34082551, 34082552, 370 89, 370 85, H04Q 1100, H04J 302, H04J 324

Patent

active

047990520

ABSTRACT:
A method of determining access on an electronic serial bus by implicit token passing. The serial bus receives and transmits data between a plurality of devices. Each device has a receiver for receiving data to the serial bus, a transmitter for transmitting data to the serial bus, a bus idle timer for detecting an idle condition on the bus, and a bus access timer for controlling access to the serial bus. Each device is assigned a unique bus address. The bus access timer of each device is loaded with a value representative of each device's own unique bus address and the unique bus address of the transmitting device. The bus access timer starts a count upon receiving an end of transmission condition from the transmitting device and stops upon receiving a start of transmission condition from the transmitting device. When a bus access timer of a device reaches a predetermined value, the device of the timed out bus access timer is given access to the bus.

REFERENCES:
patent: 4459588 (1984-07-01), Grow
patent: 4495493 (1985-01-01), Segarra et al.
patent: 4556974 (1985-12-01), Kozlik
patent: 4566098 (1986-01-01), Gammage et al.
patent: 4583089 (1986-04-01), Cope
patent: 4587650 (1986-05-01), Bell
patent: 4590468 (1986-05-01), Stieglitz
patent: 4604742 (1986-08-01), Hamada et al.

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