Data recovery scheme

• US 5,912,902 A
• Filed: 03/14/1997
• Issued: 06/15/1999
• Est. Priority Date: 03/14/1997
• Status: Expired due to Term

• Current Assignee: e-Watch, Inc. (Cision Ltd.)
• Original Assignee: David A Monroe
• Inventors: Monroe, David A.
• Primary Examiner(s): Grant, William
• Assistant Examiner(s): Marc, McDieunel, Marc, McDieunel
• Application Number:
  US08/815,025
• Time in Patent Office: 823 Days
• Field of Search: 371/30, 371/37.02, 371/32, 375/346, 375/347, 375/316, 375/260, 375/368, 395/182.16
• US Class Current: 714/746
• CPC Class Codes: G06F 11/1443 Transmit or communication errors

Abstract

A method for configuring the data stream of an electronic transmission in order to minimize the amount of data lost due to the interruption of transmissions, incorporating the use of a buffer at the receiving station to collect data as it is received, and an "information packet" in combination with the typical "sync" signal to define what data is part of the transmitted data. The information packet defines, among other things, how much data preceeds and follows the sync signal. This permits the receiving system to look for lost data in both a forward and rearward direction in the transmission if it is interrupted, and to reconstruct the data, to minimize or even avoid a lost transmission.

Claims

1. A method for recovering and continuing data transmitted from a sending station to a receiving station when the transmission has been prematurely interrupted, the method comprising the steps of:

a. providing an information signal in a data bit stream for identifying the beginning of a transmission and for identifying the duration of the transmission;

b. transmitting the data bit stream including the information signal from a sending system to a receiving system;

c. collecting and storing the bit stream comprising the transmitted data into a temporary buffer system of a predetermined capacity wherein the first bit in is the first bit out as buffer capacity is exceeded, and wherein the information signal is periodically repeated within said data bit stream, whereby the data can be recovered if lost or if the transmission is interrupted.

2. The method of claim 1, wherein the data information signal is periodically repeated within the data bit stream.

3. The method of claim 2, wherein each data information signal in the data bit stream identifies where in the data bit stream the data information signal is located and the forward and remaining duration of the data bit stream;

This may involve calculations;

only two points require position and length.

4. The method of claim 1, further including the steps of recalling the transmitted data which has been collected and stored in the event the transmission is interrupted, for reconstructing the data bit stream from the last data information signal forward.

5. The method of claim 4, further including the step of continuing the transmission after the data has been reconstructed.

6. The method of claim 1, including the step of dumping collected data after it has been established that the portion of the data has been properly received by the receiving station.

7. The method of claim 1, wherein the collection and storing step is limited to a specific quantity of data in the data bit stream and wherein the data information signal is repeated within the data bit stream at intervals containing not more than the specific quantity of data within said limits.

8. The method of claim 1, wherein the data information signal is at the beginning of the transmission and includes a beginning-of-message signal.

9. The method of claim 8, wherein the data information signal at the beginning of the transmission includes information identifying duration of the message to be transmitted.

10. The method of claim 1, wherein the data information signal is repeated at the end of the transmission and includes an end-of-message signal.

11. The method of claim 1, wherein the data information signal includes information identifying where within the message the specific data information signal is located and the length of transmission, on data to calculate the above.

12. The method of claim 11, wherein each specific data information signal includes information identifying the duration of the message signal remaining after the specific data information signal.

13. The method of claim 11, wherein each specific data information signal includes information identifying the duration of the message signal which has been transmitted prior to the specific data information signal.

14. The method of claim 11, wherein each specific data information signal includes information identifying the duration of the message signal which has been transmitted prior to the specific data information signal and information identifying the duration of the message signal remaining after the specific data information signal.

15. The method of claim 1, wherein the buffer has a capacity equal to at least the duration of data between adjacent data information signals.