Patent ID: 6678854
Filing Date: 2004-01-13
Classification: H03M,H04L

Abstract:
A method for transmitting first and second data signals, said method comprising the steps of:providing a frame of bits including a first plurality of bits defining the first data signal and a second plurality of bits defining an error-correcting code having capacity to correct N bit errors in the frame; associating at least one bit position but less than N bit positions of the frame with a message type of the second data signal; intentionally inverting the at least one associated bit position of the frame to encode the message type of the second data signal in the frame of bits; and after intentionally inverting the at least one associated bit position of the frame to encode the message type of the second data signal in the frame of bits, transmitting the encoded frame of bits; receiving the encoded frame of bits with the at least one intentionally inverted associated bit position and with an additional unintentionally inverted bit position; performing error correction on the received encoded frame of bits using the error-correcting code to decode the at least one associated bit position to recreate the first Plurality of bits defining the first data signal and to correct the additional unintentionally inverted bit position; and determining the message type based on the at least one decoded associated bit position to receive the second data signal including the message type.