US3846587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data transmission system for a multiple branch network
Assignee: Licentia Patent Verwaltungs GmbH
•
Filing: 1973-02-22
•
Granted: 1974-11-05
•
Expires: 1993-02-22
Abstract
Abstract A communication network having a plurality of branches, each composed of two transmission lines, utilizes a miltiple access data transmission system. A plurality of individual user stations are connected to the branches. The branches are interconnected via a plurality of nodes so as to form an interconnected system of all of the user stations. A synchronizing word generator is centrally disposed within the network for periodically transmitting synchronizing words. At the end of each of the branches, there is connected a reflection free sink which only transfers the synchronizing words between the two lines of the branch. Each of the user stations has circuitry for dividing the interval between two successive synchronizing words into n equal time slots and for transmitting a data block signal within a free time slot.
Inventors
- 👤 R Schehrer
- 👤 R Hildenbrand
- 👤 K Schenkel
- 👤 W Herzig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:40
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/28; H04L12/40; H04L12/403; H04J; H04J3/00; H04J3/02; H04J3/06; H04J3/062; H04J3/0626; H04J3/0635; H04J3/0682; H04J3/16; H04J3/1605; H04J3/1623; H04J3/1647; H04J3/24; H04J3/245; H04M; H04M9/00; H04M9/02; H04M9/022; H04M9/025
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
173 words
In a multiple access data transmission system connected in a communication network having a plurality of branches each composed of a first and second transmission line, a plurality of individual user stations connected to the branches and a plurality of nodes interconnecting the plurality of branches so as to form an interconnected system of all of the user stations, the improvement wherein said system comprises: generating means connected in the system for periodically transmitting synchronizing words; transfer means connected at the ends of each of the branches at the end of the network for transferring the synchronizing words between said first and second transmission lines; time division means connected within each of the user stations for dividing the interval between successive synchronizing words into n equal time slots; search means connected within each of the user stations for searching for a free time slot; and transmitting means connected within each of the user stations for transmitting a data block signal over one of said transmission lines within at least one free time slot.
Claim 2
Dependent Claim
173 words
In a multiple access data transmission system connected in a communication network having a plurality of branches each composed of a first and second transmission line, a plurality of individual user stations connected to the branches and a plurality of nodes interconnecting the plurality of branches so as to form an interconnected system of all of the user stations, the improvement wherein said system comprises: generating means connected in the system for periodically transmitting synchronizing words; transfer means connected at the ends of each of the branches at the end of the network for transferring the synchronizing words between said first and second transmission lines; time division means connected within each of the user stations for dividing the interval between successive synchronizing words into n equal time slots; search means connected within each of the user stations for searching for a free time slot; and transmitting means connected within each of the user stations for transmitting a data block signal over one of said transmission lines within at least one free time slot.
Claim 3
Dependent Claim
64 words
A data transmission system as defined in claim 1 wherein in each node on each of the outgoing lines the sync word of a respective preferred incoming direction is transmitted and further comprising: suppression means connected within each of said nodes for suppressing all of the incoming synchronizing words except the synchronizing word arriving at the respective node from the preferred direction of transmission.
Claim 4
Dependent Claim
106 words
A data transmission system as defined in claim 2 further comrising: address means connected within each of the user stations for producing an address signal representing the user station being called and transmitting such address signal within the free time slot, preceeding the associated data block signal, such tHat the address signal and the data block signal form an information block signal which fully occupies at least one time slot; and time equalization means connected within each of said nodes for synchronizing the transmission of the information block signals arriving at the respective node from each of the user stations with respect to the time slots.
Claim 5
Dependent Claim
80 words
A data transmission system as defined in claim 3 wherein said time equalization means includes: memory means capable of storing a whole multiple of the bits contained within one time slot for temporarily storing the information block signals arriving at the respective node; and readout means for reading out the information block signals from said memory means in the order in which they were stored so as to transmit them in a free time slot along a desired transmission line.
Claim 6
Dependent Claim
33 words
A data transmission system as defined in claim 1 further comprising: additional synchronizing word generator means connected within the network for automatically providing synchronizing words when a malfunction occurs in said generating means.
Claim 7
Dependent Claim
26 words
A data transmission system as defined in claim 4 wherein said address means transmits a binary ''''1'''' as the first binary bit of the address signal.
Claim 8
Dependent Claim
31 words
A data transmission system as defined in claim 4 wherein said readout means transmits the information block signals along a transmission line in which the user station being called is disposed.
Claim 9
Dependent Claim
38 words
A data transmission system as defined in claim 4 further comprising: means connected within each of said nodes for suppressing information block signals being transmitted between two user stations located on the same side of the respective node.
Claim 10
Dependent Claim
101 words
A data transmission system as defined in claim 2 wherein said first transmission line of each of said branches constitutes a transmitting line and said second transmission line of each of said branches constitutes a receiving line and that all information blocks to be transmitted from users stations are only fed to the transmission line and that all information blocks to be received from users stations are only received from the receiving line and further comprising: Feeding means connected at one point within the network for feeding the information block signals being transmitted along said transmitting line to said receiving line.
Claim 11
Dependent Claim
20 words
A data transmission system as defined in claim 9 wherein said memory means is only coupled to said transmitting lines.
Claim 12
Dependent Claim
44 words
A data transmission system as defined in claim 10 further comprising: means for providing a transfer between said transmission line and said receiving line when transmission has been interrupted by a malfunction, such transfer being effected at the node nearest the point of malfunction.
Claim 13
Dependent Claim
66 words
A data transmission system as defined in claim 6 wherein the binary ''''1'''' of the address signal is transmitted in the first binary bit position of the respective time slot and said search means includes an interrogation means for determining the presence of a binary ''''1'''' within the first binary bit position of a time slot thereby indicating if the time slot being interrogated is free.
References Cited (Backward Citations)
US2406165A
Cited
US3362881A
Cited
US3597549A
Cited
US3597549B1
Cited
US3647976A
Cited
US3659271A
Cited
US3732543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |