Patent US5124991A successfully refreshed from Google Patents.
US5124991A
Expired / Lapsed
US
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Error correction for infrared data communication
Assignee: Photonics Corp
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Filing: 1989-03-30
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Granted: 1992-06-23
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Expires: 2009-03-30
Abstract
Abstract The present invention is for a method for correcting errors in received data during transmission of infrared radiation from a transmitter to a receiver without retransmitting entire packets. The method includes the steps of detecting an error in received data. A negative acknowledgement signal is transmitted from the receiver to the transmitter. A predetermined acknowledgement is transmitted by the transmitter to indicate to the receiver that the negative acknowledgement signal has been received. The data is then retransmitted. The data is transmitted using pulse position modulation. An error is detected by either sensing two pulses within one cycle or sensing no pulses within one cycle. The negative acknowledgement signal comprises transmitting a pulse several positions in duration. The predetermined acknowledgement by the transmitter includes purposely transmitting a cycle containing a known error.
Inventors
- 👤 Richard C. Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:38
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/12; H04L1/16; H04L1/1607; G; G08; G08C; G08C25/00; G08C25/02; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4902; H04L1/18; H04L1/1803; H04L1/1867; H04L1/1874
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
124 words
A method of correcting errors in received data during transmission of a stream of data transmitted in series of cycles wherein a predetermined number of bits are transmitted during a cycle from a transmitter to a receiver and further wherein the receiver does not acknowledge receiving error free data to the transmitter, the method comprising the steps of: a) detecting an error in a cycle of the received data; b) transmitting a negative acknowledgement signal from the receiver to the transmitter during the next cycle; c) transmitting a predetermined acknowledgement by the transmitter to the receiver that the negative acknowledgement signal has been received, and d) retransmitting the data from the transmitter to the receiver beginning with the cycle during which the error occurred.
Claim 2
Independent Claim
124 words
A method of correcting errors in received data during transmission of a stream of data transmitted in series of cycles wherein a predetermined number of bits are transmitted during a cycle from a transmitter to a receiver and further wherein the receiver does not acknowledge receiving error free data to the transmitter, the method comprising the steps of: a) detecting an error in a cycle of the received data; b) transmitting a negative acknowledgement signal from the receiver to the transmitter during the next cycle; c) transmitting a predetermined acknowledgement by the transmitter to the receiver that the negative acknowledgement signal has been received, and d) retransmitting the data from the transmitter to the receiver beginning with the cycle during which the error occurred.
Claim 3
Dependent Claim
14 words
The method according to claim 1 wherein the data is transmitted via infrared radiation.
Claim 4
Dependent Claim
15 words
The method according to claim 2 wherein the data is transmitted using pulse position modulation.
Claim 5
Dependent Claim
21 words
The method according to claim 3 wherein the step of detecting errors comprises sensing more than one pulse within one cycle.
Claim 6
Dependent Claim
19 words
The method according to claim 3 wherein the step of detecting errors comprises sensing no pulses within one cycle.
Claim 7
Dependent Claim
22 words
The method according to claim 2 wherein the step of transmitting a negative acknowledgement comprises transmitting a pulse several positions in duration.
Claim 8
Dependent Claim
37 words
The method according to claim 2 wherein the step of transmitting a predetermined acknowledgement by the transmitter to the receiver that the negative acknowledgement signal has been received includes purposely transmitting a cycle containing a known error.
Claim 9
Independent Claim
112 words
A method of the type for correcting errors in received data during transmission from a transmitter to a receiver wherein the data is transmitted in a packet of bytes and further whereby the receiver need not transmit an acknowledge signal with each correctly received byte or packet, the method comprising the steps of: a) detecting an error in received data in a byte of the packet; e) transmitting a negative acknowledgement signal from the receiver to the transmitter; f) transmitting a predetermined acknowledgement by the transmitter to the receiver that the negative acknowledgement signal has been received, and g) retransmitting the data, whereby the error is corrected without retransmitting the entire packet.
Claim 10
Independent Claim
112 words
A method of the type for correcting errors in received data during transmission from a transmitter to a receiver wherein the data is transmitted in a packet of bytes and further whereby the receiver need not transmit an acknowledge signal with each correctly received byte or packet, the method comprising the steps of: a) detecting an error in received data in a byte of the packet; e) transmitting a negative acknowledgement signal from the receiver to the transmitter; f) transmitting a predetermined acknowledgement by the transmitter to the receiver that the negative acknowledgement signal has been received, and g) retransmitting the data, whereby the error is corrected without retransmitting the entire packet.
Claim 11
Dependent Claim
14 words
The method according to claim 8 wherein the data is transmitted via infrared radiation.
Claim 12
Dependent Claim
15 words
The method according to claim 9 wherein the data is transmitted using pulse position modulation.
Claim 13
Dependent Claim
21 words
The method according to claim 10 wherein the step of detecting errors comprises sensing more than one pulse within one cycle.
Claim 14
Dependent Claim
19 words
The method according to claim 10 wherein the step of detecting errors comprises sensing no pulses within one cycle.
Claim 15
Dependent Claim
22 words
The method according to claim 9 wherein the step of transmitting a negative acknowledgement comprises transmitting a pulse several positions in duration.
Claim 16
Dependent Claim
37 words
The method according to claim 9 wherein the step of transmitting a predetermined acknowledgement by the transmitter to the receiver that the negative acknowledgement signal has been received includes purposely transmitting a cycle containing a known error.
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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) | 1995-06-23 | 1995-12-23 | 1996-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-23 | 1999-12-23 | 2000-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-23 | 2003-12-23 | 2004-06-23 | $7700.00 | Window Closed / Lapsed |