Apparatus for continuous assessment of data transmission accuracy in a communication system
AssigneeHoneywell Information Systems Inc.
InventorsErnest N. Dulaney, Richard F. Elmhurst
Life of this patent
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Abstract
A method and apparatus are disclosed for monitoring the accuracy of electronic data transmitted over a communication channel or telemetry link. Data is monitored at the transmitting point and also at the receiving point. Data monitored at the receiving point is transmitted to the data transmitting station and then compared with the data monitored at the transmitting point. Means are provided to synchronize the data monitored at two points, so that comparison is conducted over the same monitored data. After synchronization the bit error rate (BER) is calculated based on the number of miscompares that result for a given quantity of data transmitted. When the system exceeds a predetermined level corrective action is taken.
Claims15
An apparatus for in-service monitoring of the accuracy of electronic data transmitted over a first communication channel or telemetry link comprising:
- a. first means, in a first system, for monitoring for accuracy a first unit of said data transmitted over said first communication channel;
- b. second means, in a second system, for monitoring for accuracy a second unit of said data received over said communication channel;
- c. third means, in said second system coupled to said second means, for transmitting substantially all of said second monitored unit of said data, which is a full version of the information in said second monitored unit of data, to said first system over a second communication channel;
- d. fourth means, in said first system coupled to said first means, for comparing substantially all of said first unit of monitored data, which is a full version of the information in said first unit of monitored data, with substantially all of said second unit of monitored data;
- and
- e. fifth means, coupled to said fourth means, for calculating a bit error rate (BER) of said data transmitted from said first system to said second system.
A method for in-service monitoring the accuracy of electronic data transmitted over a communication channel or telemetry link comprising the steps of:
- a. monitoring in a first site first units of data, one each for each set of data (i.e. block) being transmitted;
- b. monitoring in a second site second units of data, one each for each set of data (i.e. block) being received;
- c. transmitting said second unit of monitored data in said second site to said first site;
- d. comparing said second unit of monitored data with said first unit of monitored data;
- and
- e. determining if the comparison is synchronized to the same unit of data so that the first unit of monitored data in said first site is compared for the same set of data to the second unit of monitored data transmitted from said second site to said first site.
An apparatus for monitoring the accuracy of electronic data transmitted over a communication channel or telemetry link comprising:
- a. first means for monitoring first units of data (i.e. first blocks) transmitted from a transmitting station;
- b. second means for monitoring second units of data (i.e. second blocks) received at a receiving station;
- c. third means, coupled to said second means, for transmitting said second blocks of monitored data from said receiving station to said transmitting station said second blocks of data being substantially a full version of the information in said second blocks of data received;
- d. fourth means, coupled to said first and third means, for determining whether or not there is data and block synchronization;
- and
- e. fifth means, coupled to said fourth means, for calculating bit error rate, BER of data received at said receiving station.
An apparatus for monitoring the accuracy of electronic data transmitted over a communication channel or telemetry link comprising:
- a. first means for monitoring first units of data (i.e. first blocks) transmitted from a transmitting station;
- b. second means for monitoring second units of data (i.e. second blocks) received at a receiving station;
- c. third means, coupled to said first means, for transmitting said first units of monitored data from said transmitting station to said receiving station said first units of monitored data being substantially a full version of the information in said first units of data transmitted;
- d. fourth means, coupled to said first and third means, for determining whether or not there is data and block synchronization;
- and
- e. fifth means, coupled to said fourth means, for calculating bit error rate BER of data received at said receiving station.
An apparatus for in-service monitoring of the accuracy of electronic data transmitted over a selected one of a plurality of communication channels or telemetry links comprising:
- a. first means, in a first system, for selecting a first of a plurality of telemetry links or communication channels to be monitored for accuracy of data transmission;
- b. second means, in said first system, coupled to said first means, for monitoring for accuracy a first unit of said data transmitted over said selected communication channel;
- c. third means, in a second system responsive to said first system, for monitoring for accuracy a second unit of said data that is received over said selected communication channel;
- d. fourth means, in said second system coupled to said third means, for selecting a second of a plurality of telemetry links or communication channels for retransmitting said second unit of monitored data to said first system;
- e. fifth means, in said first system coupled to said second and third means, for comparing said first unit of monitored data with said second unit of monitored data;
- and
- f. sixth means, coupled to said fifth means, for calculating a bit error rate (BER) of said data transmitted from said first system to said second system.
Dependencies are inferred from the claim text.