Method and apparatus for LDPC transmission over a channel bonded link

A method for bonding a first and second channels of a home network comprising:

• a) determining that a transmitting node has an aggregated packet data unit (A-PDU) to be transmitted, the A-PDU comprised of M bytes;
• b) if both the transmitting node and a receiving node are capable of operating with channel bonding, and the A-PDU is to have either a unicast profile in channel bonding or a VLPER (very low packet error rate) unicast profile in channel bonding, then calculating a number of symbols (Nsym) required to transmit the M bytes of the A-PDU by;
• i) calculating an approximate maximum number of payload bits per OFDM symbol for each channel (MBAS,i) by multiplying a number of bits per Orthogonal Frequency Division Multiplexing (OFDM) symbol for the first channel (NBAS,i) with a quotient of the maximum LDPC codeword payload sizes from EVM reports for the first channel (kLDPCmax,1) divided by a sum of the maximum LDPC codeword payload sizes from EVM reports for the first channel (kLDPCmax,1) and a number of parity bits per LDPC codeword (Nparity);
• ii) calculating a ratio of a payload that can be carried by a primary channel with respect to an extension channel with 16 bit precision (pi);
• iii) if a product of the ratio pi times a sum of a number of bytes M in the A-PDU plus a number of bytes MOH in a bonded channel frame splitting overhead minus 18 is a multiple of 4, then calculating a number of bytes M1 to be transmitted by the transmitting node in the primary channel as a product of the ratio pi times the sum of the number of bytes in the A-PDU M plus the number of bytes in the bonded channel frame splitting overhead MOH
• iv) if the product of the ratio pi times the sum of the number of bytes M in the A-PDU plus the number of bytes MOH in the bonded channel frame splitting overhead minus 18 is not a multiple of 4, then calculating the number of bytes M1 to be transmitted by the transmitting node in the primary channel by extending a primary channel fragment (minus the MoCA header of 18 bytes) to the nearest 4 byte boundary, but not exceeding M;
• v) calculating a payload of a secondary channel M2 as the sum of Mbytes plus the number of bytes MOH in the bonded channel frame splitting overhead minus the number of bytes M1 to be transmitted by the transmitting node in the primary channel;
• and
• vi) calculating the number of symbols required to transmit the M bytes of the A-PDU based on the number of bytes M1 to be transmitted by the transmitting node in the primary channel and the number of bytes M2 to be transmitted by the transmitting node in the secondary channel.