US3830982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time division multiplex data transmission system having a monitoring signal
Assignee: Siemens AG
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Filing: 1973-04-09
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Granted: 1974-08-20
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Expires: 1993-04-09
Abstract
Abstract A data transmission system, in particular a time division multiplex (TDM) pulse code modulation (PCM) system, in which a continuous sequence of individual signals is transmitted includes a transmission path extending between two end stations which is divided into a plurality of sections and in which a monitoring signal is interposed at regular intervals into the sequence of transmitted signals. At the start of each transmission section, as viewed in the direction of transmission, the monitoring signal is either reconstructed or reinserted in the correct form independently of whether it has been received at this station in a disturbed form or in the correct form by way of the preceding transmission section. The monitoring signal is a pulse signal containing a plurality of bits. At the start of each transmission section only some of the bits of the monitoring signal are reconstructed or reinserted in the correct form, while the remaining uncorrected bits of the monitoring signal are employed for fault rate analysis and/or for message and alarm functions.
Inventors
- 👤 H Christiansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:55
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/14; H04B; H04B17/00; H04B17/40; H04J3/12; H04J3/125
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
A data transmission system comprising a pair of end stations, a transmission path extending between and connecting said end stations, said transmission path divided into a plurality of transmission sections, means for transmitting a continuous sequence of individual signals over said transmission path, means for interposing a monitoring signal at regular intervals into the sequence of signals to be transmitted, means at the start of each transmission section considered in the direction of transmission for reconstructing said monitoring signal independently of whether it was received at that point in a disturbed form or a direct form from the preceding transmission section, said monitoring signal being a pulse signal containing a plurality of bits, and wherein said means for reconstructing said monitoring signal including means for reconstructing some of the bits of the monitoring signal and reinserting the same in correct form in the transmitted sequence of signals and means responsive to the remaining uncorrected bits of said monitoring signal for indicating fault conditions.
Claim 2
Dependent Claim
163 words
A data transmission system comprising a pair of end stations, a transmission path extending between and connecting said end stations, said transmission path divided into a plurality of transmission sections, means for transmitting a continuous sequence of individual signals over said transmission path, means for interposing a monitoring signal at regular intervals into the sequence of signals to be transmitted, means at the start of each transmission section considered in the direction of transmission for reconstructing said monitoring signal independently of whether it was received at that point in a disturbed form or a direct form from the preceding transmission section, said monitoring signal being a pulse signal containing a plurality of bits, and wherein said means for reconstructing said monitoring signal including means for reconstructing some of the bits of the monitoring signal and reinserting the same in correct form in the transmitted sequence of signals and means responsive to the remaining uncorrected bits of said monitoring signal for indicating fault conditions.
Claim 3
Dependent Claim
49 words
A data transmission system as claimed in claim 1, comprising intermediate stations between adjacent ones of said transmission sections and means responsive to a transmission fault represented by the uncorrected bits of said monitoring signal for inverting at least one bit in the uncorrected part of said monitoring signal.
Claim 4
Dependent Claim
65 words
A data transmission system as claimed in claim 2, comprising multiplex means operable to provide time division multiplex operation of said data system, means for detecting frame synchronization of the multiplex operation and wherein said means for inverting at least one bit in the uncorrected part of the monitoring signal includes means operable to provide such bit inversion in response to a frame synchronization fault.
Claim 5
Dependent Claim
84 words
A data transmission system as claimed in claim 2, comprising time division mutliplex means for operating said transmission system on a time division multiplex basis, coding means for providing said data transmission system with pulse code modulation in which a code word comprises eight bits, wherein said code word is employed for frame synchronization and the bit positions 2, 3, 4, 6, 7 and 8 include the bits to be corrected and the bit position 5 forms a part of the uncorrected monitoring signal.
Claim 6
Dependent Claim
94 words
A data transmission system as claimed in claim 2, comprising multiplex means operable to provide time division multilplex operation of said data system, means for detecting frame synchronization of the multiplex operation and wherein said means for inverting at least one bit in the uncorrected part of the monitoring signal includes means operable to provide such bit inversion in response to a frame synchronization fault, and means responsive to every incorrect frame synchronization word received at an intermediate station for inverting at least one bit of the uncorrected part of the frame synchronization word.
References Cited (Backward Citations)
US2912508A
Cited
US3739098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |