Method and apparatus for LDPC transmission over a channel bonded link
View Patent ↗A particular overall architecture for transmission over a bonded channel system consisting of two interconnected MoCA (Multimedia over Coax Alliance) 2.0 SoCs (Systems on a Chip) and a method and apparatus for the case of a “bonded” channel network. With a bonded channel network, the data is divided into two segments, the first of which is transported over a primary channel and the second of which is transported over a secondary channel.
1. A method, in a transmitting node, for transmitting information over a home network comprising a first channel and a second channel, the method comprising:
determining that the transmitting node has a packet to be transmitted, the packet having M bytes;
determining a first ratio of a payload to be carried by the first channel based, at least in part, on:
a respective number of bits per symbol for each of the first and second channels;
a respective maximum parity check codeword payload size for each of the first and second channels;
a respective maximum number of payload bits per symbol for each of the first and second channels; and
wherein the first ratio is based, at least in part, on determining a second ratio of an approximate number of payload bits for a symbol of the first channel to a maximum number of payload bits per bonded symbol,
wherein said determining the second ratio comprises:
calculating the approximate number of payload bits for the symbol of the first channel based, at least in part, on the respective maximum parity check codeword payload size for the first channel and a respective number of parity bits per parity check codeword for the first channel; and
calculating the approximate number of payload bits for the symbol of the second channel based, at least in part, on the respective maximum parity check codeword payload size for the second channel and a respective number of parity bits per parity check codeword for the second channel;
allocating the M bytes between the first and second channels based on the determined first ratio, wherein said allocating comprises calculating a first number of bytes M1 to be transmitted by the transmitting node on the first channel based, at least in part, on a product of the determined first ratio and a sum of the M bytes plus a number of bytes in a bonded channel frame splitting overhead MOH; and
transmitting the M bytes over the home network utilizing the first and second channels.
2. The method of claim 1 , wherein said allocating comprises calculating a second number of bytes M2 to be transmitted by the transmitting node on the second channel as a sum of the M bytes plus the MOH bytes minus the number of bytes M1.
3. A method, in a transmitting node, for transmitting information over a home network comprising a first channel and a second channel, the method comprising:
determining that the transmitting node has a packet to be transmitted, the packet having M bytes;
determining a first ratio of a payload to be carried by the first channel based, at least in part, on:
a respective number of bits per symbol for each of the first and second channels;
a respective maximum parity check codeword payload size for each of the first and second channels;
a respective maximum number of payload bits per symbol for each of the first and second channels; and
wherein the first ratio is based, at least in part, on determining a second ratio of an approximate number of payload bits for a symbol of the first channel to a maximum number of payload bits per bonded symbol,
wherein said determining the second ratio comprises:
calculating the approximate number of payload bits for the symbol of the first channel based, at least in part, on the respective maximum parity check codeword payload size for the first channel and the respective number of parity bits per parity check codeword for the first channel; and
calculating the approximate number of payload bits for the symbol of the second channel based, at least in part, on the respective maximum parity check codeword payload size for the second channel and the respective number of parity bits per parity check codeword for the second channel;
allocating the M bytes between the first and second channels based on the calculated first ratio;
transmitting a resource reservation request (RR) comprising a request for an allocation of a requested number of symbols, and a padding byte summation value representing a summation of FEC code padding values for the requested number of symbols; and
transmitting the M bytes over the home network utilizing the first and second channels.
4. The method of claim 3 , comprising encoding the packet into a plurality of channel segments using the FEC code padding values.