Bus-method communication network system capable of seizing trans

Details Bus-method communication network system capable of seizing trans Bus-method communication network system capable of seizing trans

1987-09-30

1988-11-22

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 92, 3408255, H04Q 1104

Patent

active

047870834

ABSTRACT:
A bus-method communication network has a number of stations with assigned station numbers. An exclusive right or priority of transmission is transferred from a first station to a second station by transmission of an abort signal including synchronization information and a first address assigned to the first station. In each station, a waiting time is calculated from a first station number in the detected abort signal and the station number assigned to the receiving station. When the associated waiting time elapses, another station seizes priority as a second station and transmits a paging signal having a destination address following communication data. Each station is prevented from seizing transmission priority in response to reception of the paging signal, and the station having the destination address decodes the communication data. The second station thereafter transmits the abort signal. Each station monitors any signal on the transmission line after reception of the paging signal on the transmission line after reception of the paging signal, and measures times lapse over a period determined by its assigned address number when detecting no transmitted signal. The station having the smallest address number transmits the abort signal as a first station when the time period elapses. Each station can delay transmission of the abort signal by another time period determined by the total number of stations, when the second station has no communication data.

REFERENCES:
patent: 4516205 (1985-05-01), Eing et al.
patent: 4566098 (1986-01-01), Gammage et al.
patent: 4689786 (1987-08-01), Sidhu et al.

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