Method for efficient packet framing in a communication network

Patent metadata

Field	Value
Publication number	US-10812223-B2
Application number	US-201816004477-A
Country	US
Kind code	B2
Filing date	Jun 11, 2018
Priority date	Apr 4, 2008
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

Techniques to reduce the transmission overheads in a communication system are disclosed. In an embodiment, a method described herein relates to the elimination of redundant padding to realize an integer number of FEC code-words during the FEC-encoding process of transmission as well as the reduction/elimination of redundant padding to realize an integer number of transmission symbols during the subcarrier modulation mapping process of transmitting OFDM/ACMT/DMT symbols. The techniques are described in the context of a communication system based on the MoCA specification. Furthermore, techniques for channel-profiling, channel-estimation and bandwidth request/grant signaling that facilitate the realization of the method of reduction of transmission overheads in a MoCA system are also described.

First claim

What is claimed is:

1. A method, the method comprising:
encoding a data payload into a plurality of codewords using a hardware processor that is operable to execute a sequence of instructions stored in a memory;
for each codeword of the plurality of codewords:
selecting a corresponding multi-tone symbol from a plurality of multi-tone symbols, wherein the selection is according to a size of each of the plurality of codewords; and
modulating each of the plurality of codewords according to the corresponding multi-tone symbol; and

determining a signal-to-noise ratio for a last codeword of the plurality of codewords by interpolating corresponding signal-to-noise ratios for codewords of the plurality of codewords other than the last codeword of the plurality of codewords.

2. The method of claim 1 , wherein the plurality of codewords is a plurality of Forward Error Correction (FEC) codewords.

3. The method of claim 1 , wherein the plurality of multi-tone symbols is a plurality of adaptive constellation multi-tone (ACMT) symbols.

4. The method of claim 1 , wherein the method comprises communicating the plurality of multi-tone modulated codewords over a Multimedia Over Coax Alliance (MoCA) network.

5. The method of claim 1 , wherein a corresponding multi-tone symbol for a first codeword of the plurality of codewords is different than a corresponding multi-tone symbol for a last codeword of the plurality of codewords.

6. The method of claim 1 , wherein the method comprises adding a pad to a last codeword of the plurality of codewords.

7. The method of claim 1 , wherein the method comprises adding a pad to a portion of the data payload prior to encoding.

8. The method of claim 1 , wherein each codeword of the plurality of codewords comprises parity.

9. The method of claim 1 , wherein a corresponding multi-tone symbol for a last codeword of the plurality of codewords comprises a variable number of tones.

10. A system, the system comprising:
an encoder operable to encode a data payload into a plurality of codewords;
a modulator operable to modulate each codeword of the plurality of codewords according to a corresponding multi-tone symbol from a plurality of multi-tone symbols, wherein a selection of the corresponding multi-tone symbol is according to a size of each of the plurality of codewords; and
a receiver operable to determine a signal-to-noise ratio for a last codeword of the plurality of codewords by interpolating corresponding signal-to-noise ratios for codewords of the plurality of codewords other than the last codeword of the plurality of codewords.

11. The system of claim 10 , wherein the plurality of codewords is a plurality of Forward Error Correction (FEC) codewords.

12. The system of claim 10 , wherein the plurality of multi-tone symbols is a plurality of adaptive constellation multi-tone (ACMT) symbols.

13. The system of claim 10 , wherein the system comprises a transmitter operable to communicate the plurality of multi-tone modulated codewords over a Multimedia Over Coax Alliance (MoCA) network.

14. The system of claim 10 , wherein a corresponding multi-tone symbol for a first codeword of the plurality of codewords is different than a corresponding multi-tone symbol for a last codeword of the plurality of codewords.

15. The system of claim 10 , wherein the encoder is operable to add a pad to a last codeword of the plurality of codewords.

16. The system of claim 10 , wherein the encoder is operable to add a pad to a portion of the data payload prior to encoding.

17. The system of claim 10 , wherein each codeword of the plurality of codewords comprises parity.

18. The system of claim 10 , wherein a corresponding multi-tone symbol for a last codeword of the plurality of codewords comprises a variable number of tones.

Assignees

• Entropic Communications Llc
• Entropic Communication Llc

Inventors

• Malik Rahul
• Aggarwal Vipin

Classifications

• H04L27/2602 Primary

  Signal structure · CPC title

• H04L1/0083 Primary

  Formatting with frames or packets; Protocol or part of protocol for error control · CPC title

• H04L27/2603

  Signal structure ensuring backward compatibility with legacy system · CPC title

• H04B2201/709709

  Methods of preventing interference · CPC title

• H04L5/0046

  Determination of the number of bits transmitted on different sub-channels · CPC title