Method and apparatus for ldpc transmission over a channel bonded link

Patent metadata

Field	Value
Publication number	US-2016277144-A1
Application number	US-201514877598-A
Country	US
Kind code	A1
Filing date	Oct 7, 2015
Priority date	Jul 9, 2009
Publication date	Sep 22, 2016
Grant date	—

Abstract

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.

First claim

1 - 2 . (canceled)

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 ratio of a payload that can 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; and
a respective maximum number of payload bits per symbol for each of the first and second channels;
allocating the M bytes between the first and second channels based on the determined ratio; and transmitting the M bytes over the home network utilizing the first and second channels.

4 . The method of claim 3 , comprising receiving the respective maximum parity check codeword payload size for each of the first and second channels from a respective error vector magnitude (EVM) report for each of the first and second channels.

5 . The method of claim 3 , wherein the ratio is based, at least in part, on a 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.

6 . The method of claim 5 , comprising calculating the approximate number of payload bits for a 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 maximum parity check codeword payload size for the second channel.

7 . The method of claim 3 , wherein said determining a ratio comprises determining the ratio further based, at least in part, on a respective number of parity bits per parity check codeword for each of the first and second channels.

8 . The method of claim 7 , wherein the respective number of parity bits per parity check code word for the first channel is always equal to the respective number of parity bits per parity check code word for the second channel.

9 . The method of claim 3 , wherein the first channel is a primary channel of the home network, and the second channel is an extension channel of the home network.

10 . The method of claim 3 , wherein the packet is an aggregated packet (A-PDU) of the home network.

11 . The method of claim 3 , wherein the respective parity check codeword for each of the first and second channels comprises a Low Density Parity Check codeword.

12 . The method of claim 3 , comprising:
determining a set of optimized forward error correction (FEC) parameters based, at least in part, on a number of information bytes, Imax, that can be transported in the first channel and the second channel; and transmitting a reservation request indicating a total number of bytes to be transmitted that includes a number of FEC padding bytes.

13 . 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 ratio of a payload that can 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; and
a respective maximum number of payload bits per symbol for each of the first and second channels;
allocating the M bytes between the first and second channels based on the determined 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 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.

14 . The method of claim 13 , 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.

15 . The method of claim 13 , wherein the ratio is based, at least in part, on a 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.

16 . The method of claim 15 , comprising calculating the approximate number of payload bits for a 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 maximum parity check codeword payload size for the second channel.

17 . The method of claim 13 , wherein said determining a ratio comprises determining the ratio further based, at least in part, on a respective number of parity bits per parity check codeword for each of the first and second channels.

18 . 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 ratio of a payload that can 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; and
a respective maximum number of payload bits per symbol for each of the first and second channels;
allocating the M bytes between the first and second channels based on the calculated 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.

19 . The method of claim 18 , comprising encoding the packet into a plurality of channel segments using the FEC code padding values.

20 . The method of claim 18 , wherein the ratio is based, at least in part, on a 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.

21 . The method of claim 20 , comprising calculating the approximate number of payload bits for a 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 maximum parity check codeword payload size for the second channel.

22 . The method of claim 18 , wherein said determining a ratio comprises determining the ratio further based, at least in part, on a respective number of parity bits per parity check codeword for each of the first and second channels.

Assignees

• Entropic Communications Inc

Inventors

• Barr David
• Tsatsanis Michail
• Mueller Arndt
• Chen Na

Classifications

• H03M13/618

  Shortening and extension of codes · CPC title

• H04L25/14

  Channel dividing arrangements {, i.e. in which a single bit stream is divided between several baseband channels and reassembled at the receiver} · CPC title

• H04L2001/0096

  Channel splitting in point-to-point links · CPC title

• H04L1/02

  by diversity reception · CPC title

• H04L1/0042

  Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape (H04L1/0067 takes precedence) · CPC title