Secondary station operable in a data communication network like

Details Secondary station operable in a data communication network like Secondary station operable in a data communication network like

1987-01-23

1989-02-21

Fleming, Michael R.

Excavating

371 33, G06F 1100

Patent

active

048072265

ABSTRACT:
In a secondary station which is used in a data communication network between a pair of primary stations and which comprises a receiver for detecting a flag in each of signal combinations transmitted from either of the primary stations at a predetermined time interval and a transmitter for transmitting towards a particular one of the primary station, upon detection of the flag, a first combined signal comprising the flag and a data signal which should be transmitted towards the particular primary station, a controller is used in controlling the transmitter to make the transmitter transmit towards a different one of the primary stations, when the receiver does not detect the flag transmitted from the particular primary station upon lapse of the predetermined time interval from next previous detection of the flag transmitted from the particular primary station but detects the flag transmitted from the different primary station, a second combined signal comprising the data signal and the flag which is transmitted from the different primary station. The controller may be coupled to a timer which is used for each primary station in counting up to the predetermined time interval for the flag transmitted from the particular primary station and up to a half of the predetermined time interval for the flag transmitted from the different primary station to make the transmitter transmit the second combined signal.

REFERENCES:
patent: 3754211 (1973-08-01), Rocher
patent: 4332027 (1982-05-01), Malcolm
patent: 4549297 (1985-10-01), Nishimoto
patent: 4586086 (1986-04-01), Ohzeki
patent: 4646300 (1987-02-01), Goodman

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