Transmission control system
First Claim
1. In a transmission control system for data transmission wherein multiple devices share one circuit so that each of the devices may transmit data on the circuit according to a predetermined transmission sequence, the improvement wherein each device comprises a first detecting means to detect an immediately preceding transmission signal from another device in said predetermined transmission sequence, a second detecting means to detect a further preceding transmission signal from another device in said predetermined transmission sequence, and means for starting successive transmissions in response either to detecting, by said first detecting means, a transmission signal from said immediately preceding signal or after a predetermined time by detecting a next preceding transmission signal from still another device, whereby substantially continuous transmission is accomplished without delay due to failure of any device used in the sequential transmission of said signals.
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Accused Products
Abstract
In the system where multiple devices share one circuit by a sequential transmission system, each of the devices is adopted to monitor the transmission from a device one stage before the device which is immediately prior to the device and when a predetermined period of time passes after the transmission from the devices two stages before the device was made, the device is made to start its own transmission without waiting for the transmission from the device immediately therebefore. The transmission control system mentioned above does not fail and the sequential transmission continues even if a part of the devices fails.
68 Citations
8 Claims
- 1. In a transmission control system for data transmission wherein multiple devices share one circuit so that each of the devices may transmit data on the circuit according to a predetermined transmission sequence, the improvement wherein each device comprises a first detecting means to detect an immediately preceding transmission signal from another device in said predetermined transmission sequence, a second detecting means to detect a further preceding transmission signal from another device in said predetermined transmission sequence, and means for starting successive transmissions in response either to detecting, by said first detecting means, a transmission signal from said immediately preceding signal or after a predetermined time by detecting a next preceding transmission signal from still another device, whereby substantially continuous transmission is accomplished without delay due to failure of any device used in the sequential transmission of said signals.
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8. A transmission control system providing for sequential multiplexed signal transmission from a set of transmission devices along a common transmission line, said system providing for a sequencing of signal transmissions by detection of a signal from a previously transmitting device, the improvement comprising:
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means for detecting the transmissions of respective ones of said devices during a sequence of such transmissions; means for activating the transmission of one of said devices upon completion of a previous transmission in said sequence of transmissions; and
wherein said activating means comprises;trigger means responsive to signal detections of said detecting means for initiating a signal transmission by one of said devices upon the absence of a detection of a previous signal transmission in said sequence, said trigger means including means for delaying an initiation of signal transmission by an amount of time allocated for a previous signal transmission by said sequence.
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Specification