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 for determining a number of symbols needed to carry data to be transmitted over at least two bonded channels in a Multimedia over Coax Alliance (MoCA) 2.0 Network by a transmitting node communicating with a Network Controller, the transmitting node comprising at least one integrated circuit, the method comprising:
determining a number of bits per Orthogonal Frequency Division Multiplexing (OFDM) symbol for the at least two channels;
determining a number of parity bits per Low Density Parity Check (LDPC) codeword;
determining a maximum LDPC codeword payload sizes as determined from Error Vector Magnitude (EVM) reports for each channel;
determining a bonded channel frame splitting overhead; and
determining a maximum number of payload bits per OFDM symbol for each channel;
wherein the maximum number of payload bits per bonded OFDM symbol in channel i (M BAS,i ) is determined by the formula:
M
BAS
,
i
=
⌊
N
BAS
,
i
×
kLDPC
max
,
i
kLDPC
max
,
i
+
N
parity
⌋
where the index i indicates the particular channel, where N BAS,i is the number of bits per OFDM symbol to be used for channel i, where kLDPC max,i is the maximum LDPC codeword payload size for channel i, and N parity is the number of parity bits per LDPC codeword; and
transmitting information in the at least two bonded channels to a receiving node.