Method of transmitting information between stations attached to

Details Method of transmitting information between stations attached to Method of transmitting information between stations attached to

1981-12-01

1984-01-31

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 94, H04J 600

Patent

active

044294050

ABSTRACT:
In a ring communication system comprising several stations, access to the ring is granted to one station at a time by a circulating token indication. A method is provided guaranteeing a transmission opportunity for synchronous or circuit-switched data in periodic time intervals to authorized stations. A CS monitor station issues a frame header which is marked in a specific bit position to allow only authorized stations to transmit their synchronous data together with a distination address. In a first embodiment, a single frame comprises a plurality of slots each having a free/busy indication, a destination address field and a field for synchronous data, and each authorized station can occupy one such slot. In a second embodiment, a marked frame can be used by only one authorized station for transmitting synchronous data, but a new marked frame header is reissued until all authorized stations around the ring have transmitted synchronous data.

REFERENCES:
patent: 4168400 (1979-09-01), Couasnon et al.
patent: 4236245 (1980-11-01), Freeny et al.

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