Multiplex communications – Wide area network – Packet switching
Patent
1994-11-02
1996-07-30
Safourek, Benedict V.
Multiplex communications
Wide area network
Packet switching
455 542, H04J 316
Patent
active
055419283
ABSTRACT:
A communication system between a host station and a plurality of substations eliminates the possibility of a connection failure between the host and a given substation by attempting to establish a communication session a finite number of times. The host station transmits and receives data to and from the substations and processes the data. Every time one of the substations receives a pilot command from the host station, it selects a time slot provided in the host station's operation schedule based on digit information of the substation's unique ID code and transmits a response signal in that time slot to the host. If the response conflicts with another substation's response, information based on a different digit in the ID code is selected. Because the ID code is unique to the substation, a communication session will eventually be established, and the probability of a conflict with a response from another substation is reduced to zero by re-transmission by transmitting the request a finite number of times.
REFERENCES:
patent: 4471345 (1984-09-01), Barrett, Jr.
patent: 5068654 (1991-11-01), Husher
patent: 5345474 (1994-09-01), Hoshikawa
Kobayashi Nakaba
Nagura Michinaga
Toyama Kazumasa
Jung Min
Nippondenso Co. Ltd.
Safourek Benedict V.
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