US4584684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data transmission method
Assignee: Pioneer Corp
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Filing: 1983-11-22
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Granted: 1986-04-22
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Expires: 2003-11-22
Abstract
Abstract A data transmission method in which a signal receiving side produces a response code for requesting a text in response to a start request made by a signal transmitting side, and produces an acknowledgement code or a text invalid code upon receiving the requested text, dependent upon the validity of the transmission. A standby request signal is set to the signal transmitting side in response to the start request if the receiving side is not ready. The receiving side, when ready, send a transmission request signal to the signal transmitting side for requesting transmission of text. When a first transmission request signal is received following receipt of a start request code, a timer is started at the transmitting side and the text is transmitted. The receiving side can send additional transmission requests, in which case the text is retransmitted without restarting the clock. Unless the transmission of a text has been completed successfully and an acknowledgement signal received from the receiving side before the timer runs out, the transmission of the text is suspended or invalidated.
Inventors
- 👤 Kunihiko Nagasawa
- 👤 Isao Nishibori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:44
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/12; H04L1/16; H04L1/18; H04L1/1867; H04L1/188
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
284 words
A method for operating a data transmission system having a transmitting side and a receiving side, comprising the steps of: sending a start request signal from said transmitting side to said receiving side; deciding on said receiving side if text is to then be received; sending to said transmitting side from said receiving side in response to said start request signal (a) a retransmission request signal if text is then to be received, or (b) a text invalid/standby signal if text is not then to be received; if said text valid/standby signal is sent from said receiving side to said transmitting side, later deciding on said receiving side when text can be received; responsive to said later deciding, sending from said receiving side to said transmitting side a retransmission request signal; sending text from said transmitting side to said receiving side upon said transmitting side receiving said retransmission request signal; simultaneously upon commencement of the sending of said text at said transmitting side, starting a timer to count a predetermined time period; halting the sending of said text from said transmitting side to said receiving side if a text invalid/standby signal is received from said receiving side, said timer continuing to count out said predetermined time period irrespective of the receipt at said transmitting side of said text invalid/standby signal; sending from said receiving side to said transmitting side a text acknowledgement signal when valid text has been received by said receiving side; and invalidating at said transmitting side text sent from said transmitting side to said receiving side if said time completes counting out said predetermined time period before said text acknowledgement signal is received at said retransmitting side from said receiving side.
Claim 2
Independent Claim
284 words
A method for operating a data transmission system having a transmitting side and a receiving side, comprising the steps of: sending a start request signal from said transmitting side to said receiving side; deciding on said receiving side if text is to then be received; sending to said transmitting side from said receiving side in response to said start request signal (a) a retransmission request signal if text is then to be received, or (b) a text invalid/standby signal if text is not then to be received; if said text valid/standby signal is sent from said receiving side to said transmitting side, later deciding on said receiving side when text can be received; responsive to said later deciding, sending from said receiving side to said transmitting side a retransmission request signal; sending text from said transmitting side to said receiving side upon said transmitting side receiving said retransmission request signal; simultaneously upon commencement of the sending of said text at said transmitting side, starting a timer to count a predetermined time period; halting the sending of said text from said transmitting side to said receiving side if a text invalid/standby signal is received from said receiving side, said timer continuing to count out said predetermined time period irrespective of the receipt at said transmitting side of said text invalid/standby signal; sending from said receiving side to said transmitting side a text acknowledgement signal when valid text has been received by said receiving side; and invalidating at said transmitting side text sent from said transmitting side to said receiving side if said time completes counting out said predetermined time period before said text acknowledgement signal is received at said retransmitting side from said receiving side.
Claim 3
Dependent Claim
28 words
The method of claim 1, further comprising the step of, at said transmitting side, recommencing sending of text upon receiving a retransmission request signal from said receiving side.
Claim 4
Dependent Claim
41 words
The method of claim 1, wherein said timer is started upon reception of the first occurrence of a retransmission request signal from said receiving side following the sending from said transmitting side to said receiving side of a start request signal.
Claim 5
Dependent Claim
35 words
The method of claim 1, further comprising the step of, at said receiving side, checking the parity of a received text, and sending a text invalid/standby signal in the case that said parity is incorrect.
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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) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |