Patent ID: 8600057
Filing Date: 2013-12-03
Classification: H04Q

Abstract:
1. A method comprising: encapsulating, by an optical network device, at least a portion of a data packet to form a passive optical network (PON) frame; applying, by the optical network device, a scrambling polynomial to at least a portion of the PON frame to generate a scrambled PON frame; determining, by the optical network device, that the scrambled PON frame comprises a consecutive identical digit (CID) sequence greater than a threshold length; based on the determination that the scrambled PON frame comprises the CID sequence greater than the threshold length, replacing, by the optical network device, either an entirety of a payload portion of the PON frame with a correction pattern or a remainder of the PON frame with the correction pattern to generate a modified scrambled PON frame, wherein the remainder of the PON frame begins at a bit that immediately follows the determined CID sequence and ends at a final bit of the payload portion; based on the replacement with the correction pattern, modifying, by the optical network device, a header of the modified scrambled PON frame to include a correction flag that indicates the replacement with the correction pattern; and transmitting, by the optical network device, the modified scrambled PON frame.