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US3755628A
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Time diversity, multi-redundant data synchronized transmission system
Assignee: RTX Corp
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Filing: 1970-12-04
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Granted: 1973-08-28
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Expires: 1990-12-04
Abstract
Abstract Four independent data stations, each having data sources and data responders, transmit data signals from one to another in response to commands, in the nature of polling instructions or addresses, generated by one of the units. Time division multiplexed transmission is over dual lines in the form of bipolar/return-to-zero signals which permit utilizing discrete signals indicative of either data ONEs or ZEROs as a data clock for synchronizing the transmitting, receiving and command stations. Counters indicate completion of transmission of fixed formatted groups of data words, and monostable multivibrator time outs are used to sense times between words, between multiword transmission and reception periods, and between frames of transmission periods. The receiver of each unit recognizes the unit designations of each command, causing that unit to transmit or receive when it is involved, and preventing that unit from recognizing further data signals when it is not involved. Substantially every part of each of the units, including the command section of one of the units, is provided in triple redundancy, there also being provided three independent, bipolar/return-to-zero data channels. One of the data channels is provided with a two word delay at the output of each transmitter and no delay at the input to each receiver; a second data channel is provided with a one word delay at the output of each transmitter and a one word delay at the input to each receiver; and the third data channel is provided with no delay at the output of each transmitter and a two word delay at the input to each receiver; thus the actual transmission is provided with time diversity, whereby noise, such as a flash of lightening might generate, effects only one word out of the three redundant words being transmitted since the other two words are diverse in time from the generated noise. Data, and certain of the functions for controlling the units, are majority-voted so that the data or control indicium is taken to be that for which two out of the three redundant sets indicate likeness.
Inventors
- 👤 I Hughes
- 👤 J Games
- 👤 J Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:38
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L1/00; H04L1/02; H04L12/00; H04L12/28; H04L12/40; H04L12/40169; H04L12/40176; H04L2012/40267; H04L2012/4028
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
202 words
Data communication apparatus comprising: a plurality of data transmission channel means, said plurality being in excess of two; source means presenting a word-sized group of data signals for transmission on said channel; transmitter means including a plurality of time diversity means responsive to said source means for presenting said data signals to each of said data transmission channels independently, said means presenting said group of data signals to each of said channels in a unit of time different from the unit of time when said means presents said group of data signals to each other one of said data transmission channels, each of said units of time being substantially contiguous; receiver means including time diversity correction means responsive to data signals on all of said channels to present related groups of data signals received from all of said channels in a single unit of time, and including a majority vote means responsive to said time diversity correction means to provide a group of output data signals identical to the groups of data signals presented by said time diversity correction means from a majority of said channels; and responder means responsive to said receiver means for receiving said group of output data signals.
Claim 2
Dependent Claim
202 words
Data communication apparatus comprising: a plurality of data transmission channel means, said plurality being in excess of two; source means presenting a word-sized group of data signals for transmission on said channel; transmitter means including a plurality of time diversity means responsive to said source means for presenting said data signals to each of said data transmission channels independently, said means presenting said group of data signals to each of said channels in a unit of time different from the unit of time when said means presents said group of data signals to each other one of said data transmission channels, each of said units of time being substantially contiguous; receiver means including time diversity correction means responsive to data signals on all of said channels to present related groups of data signals received from all of said channels in a single unit of time, and including a majority vote means responsive to said time diversity correction means to provide a group of output data signals identical to the groups of data signals presented by said time diversity correction means from a majority of said channels; and responder means responsive to said receiver means for receiving said group of output data signals.
Claim 3
Dependent Claim
162 words
Data communication apparatus according to claim 1 wherein: said channel means comprise signal channels having signal lines wherein a signal of a first data significance is manifested by a first condition of said signal lines, and a signal of a second data significance is manifested by a second condition of said signal lines; said transmitter means includes a plurality of driver means, one for each of said channel means, each responsive to the related one of said time diversity means for converting said words of data signals to signals of data significance on said signal lines; and wherein said receiver means includes means responsive to said channel means for generating data signals of said first data significance in response to said first condition of said signal lines, and for generating clock signals in response to either one of said first and second conditions of said signal lines, and means responsive to said clock signals for synchronizing its response to said data signals.
Claim 4
Dependent Claim
77 words
Data communication apparatus according to claim 2 wherein: said transmitter means includes a plurality of clock means, each related to one of said channel means, each for providing data synchronizing clocking signals for controlling the presenting of said data signals to the corresponding one of said channel means, each of said clock mEans being synchronized at the start of each related one of said units of time with at least one other one of said clock means.
Claim 5
Dependent Claim
195 words
Data communication apparatus according to claim 1 wherein: said channel means comprise bipolar signal channels having a pair of signal lines wherein a signal of a first data significance is manifested by a first bipolar condition in which a first one of said lines is of a given polarity with respect to the second one of said lines, and a signal of a second data significance is manifested by a second bipolar condition in which the second one of said lines is of said given polarity with respect to the first of said lines; said transmitter means includes a plurality of driver means, one for each of said channel means, each responsive to the related one of said time diversity means for converting said words of data signals to bipolar signals for application to said lines; and wherein said receiver means includes means responsive to said channel means for generating data signals of said first data significance in response to said first bipolar condition of said lines, and for generating clock signals in response to either of said bipolar conditions, and means responsive to said clock signals for synchronizing its response to said data signals.
Claim 6
Dependent Claim
77 words
Data communication apparatus according to claim 4 wherein: said transmitter means includes a plurality of clock means, each related to one of said channel means, each for providing data synchronizing clocking signals for controlling the presenting of said data signals to the corresponding one of said channel means, each of said clock means being synchronized at the start of each related one of said units of time with at least one other one of said clock means.
Claim 7
Dependent Claim
237 words
A data communication system comprising: a data communication link including a plurality of independent data communication channels, said plurality being in excess of two; and a plurality of units, each of said units including a transmitter portion and a receiver portion, one of said units including a command generating portion, said data communication link interconnecting all of said units including connecting each of said transmitters with each of said receivers, each of said units including means associated with each of said receivers for sensing the lack of signals on said communication link for a given period of time to generate a communication start signal, means in each of said receivers for registering a transmission command indicative for the related unit to transmit, and means responsive to said transmit command and to said start signal to cause the related transmitter to transmit, each of said transmitter portions including a plurality of clock signal generating means, one for each of said data channels, each of said receiver portions including a plurality of said communication start signal generating means, each of said clock signa generating means including one of said start means, each of said clock signal generating means being dependent on receipt of communication start signals from a majority of said communication start signal generating means of the related unit in order to initiate generation of clock signals, whereby said clock signals are synchronized by said communication start signals.
Claim 8
Dependent Claim
237 words
A data communication system comprising: a data communication link including a plurality of independent data communication channels, said plurality being in excess of two; and a plurality of units, each of said units including a transmitter portion and a receiver portion, one of said units including a command generating portion, said data communication link interconnecting all of said units including connecting each of said transmitters with each of said receivers, each of said units including means associated with each of said receivers for sensing the lack of signals on said communication link for a given period of time to generate a communication start signal, means in each of said receivers for registering a transmission command indicative for the related unit to transmit, and means responsive to said transmit command and to said start signal to cause the related transmitter to transmit, each of said transmitter portions including a plurality of clock signal generating means, one for each of said data channels, each of said receiver portions including a plurality of said communication start signal generating means, each of said clock signa generating means including one of said start means, each of said clock signal generating means being dependent on receipt of communication start signals from a majority of said communication start signal generating means of the related unit in order to initiate generation of clock signals, whereby said clock signals are synchronized by said communication start signals.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |