US3359543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data transmission system
Assignee: International Business Machines Corp
•
Filing: 1965-07-02
•
Granted: 1967-12-19
•
Expires: 1985-07-02
Abstract
No abstract record available.
Inventors
- 👤 Francis P Corr
- 👤 Jr Alexander H Frey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:52
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/12; H04L1/16; H04L1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
327 words
A COMMUNICATIONS TERMINAL IN AN ADAPTIVE, DUAL REQUEST-RETRANSMIT DATA TRANSMISSION SYSTEM COMPRISING: A TRANSMITTING MEANS INCLUDING MEANS FOR BUFFERING RECENTLY TRANSMITTED DATA, MEANS FOR ENCODING DATA INTO MESSAGE BLOCKS FOR TRANSMISSION AND MEANS FOR TRANSMITTING THE MESSAGE BLOCKS, SAID MESSAGE BLOCKS HAVING MORE THAN ONE FORMAT WITH EACH FORMAT DIFFERING IN RESISTANCE TO ADVERSE CONDITIONS ON THE TRANSMISSION LINK, EACH OF SAID MESSAGE BLOCKS HAVING AN OK/RQ SIGNAL AND A MODE SYNCHRONIZING SIGNAL; A RECEIVING MEANS INCLUDING MEANS FOR RECEIVING MESSAGE BLOCKS, MEANS FOR DECODING AND DETECTING DATA, ERRORS, OK/RQ SIGNALS AND MODE SYNCHRONIZING SIGNALS FROM THE RECEIVED MESSAGE BLOCKS, MEANS FOR BUFFERING RECEIVED DATA AND MEANS FOR READING OUT ERROR-FREE DATA; AN ADAPTIVE CONTROL MEANS INCLUDING MEANS RESPONSIVE TO SAID RECEIVING MEANS FOR ADAPTING THE DECODING OPERATION IN SAID RECEIVING MEANS AND THE ENCODING OPERATION IN SAID TRANSMITTING MEANS TO A FIRST MESSAGE FORMAT MORE RESISTANT TO ADVERSE CONDITIONS WHEN SAID RECEIVING MEANS DETECTS AN ERROR OR AN RQ SIGNAL IN THE RECEIVED MESSAGE BLOCK, MEANS FOR SIGNALING TO THE OTHER TERMINAL IN THE TRANSMISSION LINK THE ADAPTATION OF TRANSMITTED MESSAGE BLOCKS TO THE FIRST MESSAGE FORMAT BY INSERTING AN RQ SIGNAL IN THE TRANSMITTED MESSAGE BLOCK, MEANS RESPONSIVE TO SAID RECEIVING MEANS FOR ADAPTING THE DECODING OPERATION IN SAID RECEIVING MEANS TO A SECOND MESSAGE FORMAT LESS RESISTANT TO ADVERSE CONDITIONS WHEN SAID RECEIVING MEANS DETECTS A MODE SYNCHRONIZING SIGNAL INDICATING THE MESSAGE FORMAT OF RECEIVED MESSAGE BLOCKS IS BEING CHANGED TO THE SECOND MESSAGE FORMAT, MEANS RESPONSIVE TO SAID RECEIVING MEANS FOR ADAPTING THE ENCODING OPERATION IN SAID TRANSMITTING MEANS TO THE SECOND MESSAGE FORMAT WHEN SAID RECEIVING MEANS DETECTS A PLURALITY OF ERROR-FREE RECEIVED MESSAGE BLOCKS AND MEANS FOR SIGNALING TO THE OTHER TERMINAL IN THE TRANSMISSION LINK THE ADAPTATION OF THE TRANSMITTED MESSAGE BLOCK TO THE SECOND MESSAGE FORMAT BY INSERTING IN THE TRANSMITTED MESSAGE BLOCK A MODE SYNCHRONIZING SIGNAL INDICATING THE MESSAGE FORMAT IS BEING CHANGED TO THE SECOND MESSAGE FORMAT.
Claim 2
Dependent Claim
327 words
A COMMUNICATIONS TERMINAL IN AN ADAPTIVE, DUAL REQUEST-RETRANSMIT DATA TRANSMISSION SYSTEM COMPRISING: A TRANSMITTING MEANS INCLUDING MEANS FOR BUFFERING RECENTLY TRANSMITTED DATA, MEANS FOR ENCODING DATA INTO MESSAGE BLOCKS FOR TRANSMISSION AND MEANS FOR TRANSMITTING THE MESSAGE BLOCKS, SAID MESSAGE BLOCKS HAVING MORE THAN ONE FORMAT WITH EACH FORMAT DIFFERING IN RESISTANCE TO ADVERSE CONDITIONS ON THE TRANSMISSION LINK, EACH OF SAID MESSAGE BLOCKS HAVING AN OK/RQ SIGNAL AND A MODE SYNCHRONIZING SIGNAL; A RECEIVING MEANS INCLUDING MEANS FOR RECEIVING MESSAGE BLOCKS, MEANS FOR DECODING AND DETECTING DATA, ERRORS, OK/RQ SIGNALS AND MODE SYNCHRONIZING SIGNALS FROM THE RECEIVED MESSAGE BLOCKS, MEANS FOR BUFFERING RECEIVED DATA AND MEANS FOR READING OUT ERROR-FREE DATA; AN ADAPTIVE CONTROL MEANS INCLUDING MEANS RESPONSIVE TO SAID RECEIVING MEANS FOR ADAPTING THE DECODING OPERATION IN SAID RECEIVING MEANS AND THE ENCODING OPERATION IN SAID TRANSMITTING MEANS TO A FIRST MESSAGE FORMAT MORE RESISTANT TO ADVERSE CONDITIONS WHEN SAID RECEIVING MEANS DETECTS AN ERROR OR AN RQ SIGNAL IN THE RECEIVED MESSAGE BLOCK, MEANS FOR SIGNALING TO THE OTHER TERMINAL IN THE TRANSMISSION LINK THE ADAPTATION OF TRANSMITTED MESSAGE BLOCKS TO THE FIRST MESSAGE FORMAT BY INSERTING AN RQ SIGNAL IN THE TRANSMITTED MESSAGE BLOCK, MEANS RESPONSIVE TO SAID RECEIVING MEANS FOR ADAPTING THE DECODING OPERATION IN SAID RECEIVING MEANS TO A SECOND MESSAGE FORMAT LESS RESISTANT TO ADVERSE CONDITIONS WHEN SAID RECEIVING MEANS DETECTS A MODE SYNCHRONIZING SIGNAL INDICATING THE MESSAGE FORMAT OF RECEIVED MESSAGE BLOCKS IS BEING CHANGED TO THE SECOND MESSAGE FORMAT, MEANS RESPONSIVE TO SAID RECEIVING MEANS FOR ADAPTING THE ENCODING OPERATION IN SAID TRANSMITTING MEANS TO THE SECOND MESSAGE FORMAT WHEN SAID RECEIVING MEANS DETECTS A PLURALITY OF ERROR-FREE RECEIVED MESSAGE BLOCKS AND MEANS FOR SIGNALING TO THE OTHER TERMINAL IN THE TRANSMISSION LINK THE ADAPTATION OF THE TRANSMITTED MESSAGE BLOCK TO THE SECOND MESSAGE FORMAT BY INSERTING IN THE TRANSMITTED MESSAGE BLOCK A MODE SYNCHRONIZING SIGNAL INDICATING THE MESSAGE FORMAT IS BEING CHANGED TO THE SECOND MESSAGE FORMAT.
References Cited (Backward Citations)
US3261001A
Cited
US3235661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |