Method and apparatus for reliable unidirectional communication in a data network
First Claim
1. A computer-readable data signal for modifying the operation of a receiving device, said data signal comprising:
- at least one frame for modifying the operation of the receiving device when the receiving device receives and processes said at least one frame; and
an integrity element associated with said at least one frame, said integrity element containing a first checksum value determined from said at least one frame, said first checksum for validating the contents of said at least one frame, said validating being successful if a second checksum value computed over said at least one frame at said receiving device matches said first checksum value.
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Accused Products
Abstract
A system and method for performing reliable unidirectional communication in a data network is disclosed. Unidirectional data is sent from a transmitting device to a receiving device. Prior to transmission, the data is divided into a window (401b) comprised of data bytes. A checksum value (407) is computed across data bytes comprising window (401b). Checksum value (407) is placed into an XML integrity element (404) that encapsulates window (401b) in a manner allowing a receiving device to use the contents of integrity element (404) to validate the received window (401b). Checksum value (407) is compared to a second check sum value computed across window (401b) at the receiving device. If checksum value (407) matches the second checksum value, window (401b) is validated.
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Citations
21 Claims
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1. A computer-readable data signal for modifying the operation of a receiving device, said data signal comprising:
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at least one frame for modifying the operation of the receiving device when the receiving device receives and processes said at least one frame; and
an integrity element associated with said at least one frame, said integrity element containing a first checksum value determined from said at least one frame, said first checksum for validating the contents of said at least one frame, said validating being successful if a second checksum value computed over said at least one frame at said receiving device matches said first checksum value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A computer-readable data signal for modifying the operation of a receiving device, said data signal comprising:
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a frame containing at least a subset of a plurality of bytes, the contents of said frame for modifying said operation of said receiving device upon receipt and processing, by said receiving device; and
an integrity element containing a first checksum value determined from said at least a subset of said plurality of bytes, said first checksum for validating the contents of said frame, said validating being successful if a second checksum value computed over said frame at said receiving device matches said first checksum value, wherein said integrity element is an eXtensible markup language (XML) element encapsulating said frame. - View Dependent Claims (19, 20, 21)
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Specification