Cumulative error detecting code

A method of transmitting cells comprising:

• calculating a CRC checksum as a function of at least a portion of a next cell to be transmitted and a CRC checksum of a previous cell appended to the next cell;
• replacing the CRC checksum of the previous cell appended to the next cell with the next CRC checksum;
• and
• transmitting the next cell including the next CRC checksum appended thereto.

A method of transmitting cells comprising:

• storing an error detecting code of a previous cell;
• receiving the next cell to be transmitted;
• appending the error detecting code of the previous cell to the next cell;
• calculating a next error detecting code as a function of at least a portion of the next cell to be transmitted and the error detecting code of the previous cell appended thereto;
• replacing the error detecting code of the previous cell appended to the next cell with the next error detecting code;
• and
• transmitting the next cell including the next error detecting code appended thereto.

A method of transmitting cells comprising:

• calculating at a source node a first error detecting code as a function of at least a portion of a first cell to be transmitted;
• appending the first error detecting cell to the first cell as a trailer thereto;
• storing the first error detecting code at the source node;
• transmitting the first cell including the first error detecting code appended thereto from the source node;
• calculating a second error detecting code at the source node as a function of at least a portion of a second cell with the first error detecting code appended thereto;
• storing the second error detecting code at the source;
• replacing the first error detecting code with the second error detecting code as the trailer for the second cell;
• and
• transmitting the second cell including the second error detecting code appended thereto from the source node.

A method of receiving cells comprising:

• storing a previous error detecting code;
• receiving a next cell including a next error detecting code appended thereto;
• storing the next error detecting code;
• replacing the next error detecting code appended to the next cell with the previous error detecting code;
• calculating a test error detecting code as a function of the next cell and the previous error detecting code appended thereto;
• and
• comparing the test error detecting code with the next error detecting code to determine if there is an error in the received next cell.

A method of receiving cells comprising:

• storing a previous CRC checksum;
• receiving a next cell including a next CRC checksum appended thereto;
• storing the next CRC checksum;
• replacing the next CRC checksum appended to the next cell with the previous CRC checksum;
• calculating a test CRC checksum as a function of the next cell and the previous CRC checksum appended thereto;
• and
• comparing the test CRC checksum with the next CRC checksum to determine if there is an error in the received next cell.

A computer program encoded on a computer readable medium for transmitting a cell, the computer program causing the following to be performed when executed by a computer:

• calculating a next error detecting code as a function of at least a portion of a next cell to be transmitted and an error detecting code of a previous cell appended to the next cell;
• replacing the error detecting code of the previous cell appended to the next cell with the next error detecting code;
• and
• transmitting the next cell including the next error detecting code appended thereto.

A computer program encoded on a computer readable medium for receiving a cell, the computer program causing the following to be performed when executed by a computer:

• storing a previous error detecting code;
• receiving a next cell including a next error detecting code appended thereto;
• storing the next error detecting code;
• replacing the next error detecting code appended to the next cell with the previous error detecting code;
• calculating a test error detecting code as a function of the next cell and the previous error detecting code appended thereto;
• and
• comparing the test error detecting code with the next error detecting code to determine if there is an error in the received next cell.