Transmitter channel throughput in an information network

• US 8,730,798 B2
• Filed: 05/05/2010
• Issued: 05/20/2014
• Est. Priority Date: 05/05/2009
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Kliger, Avi, Klein, Philippe, Ohana, Yitshak
• Primary Examiner(s): TRAN, PHUC H
• Application Number:
  US12/774,326
• Publication Number:
  US 20100284474A1
• Time in Patent Office: 1,476 Days
• US Class Current: 370/230
• CPC Class Codes: H04L 25/03866 using scrambling
• CPC Class Codes: H04L 27/2626 Arrangements specific to the transmitter only
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/15 in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/30 in combination with information about buffer occupancy at either end or at transit nodes
• CPC Class Codes: H04L 47/431 using padding or de-padding
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0042 intra-user or intra-terminal allocation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver

Abstract

Apparatus and methods for transmitting information over a home coax network. The apparatus and methods may involve a physical layer frequency domain signal preprocessor and a physical layer time domain signal transmitter. The transmitter may be configured to receive the signal from the preprocessor and transmit the signal over coax that is in radiofrequency communication with a plurality of network nodes, the transmitter having a first transmission channel and a second transmission channel. The signal may be received by a receiver on the network. The receiver may have a MAC-to-PHY interface that is configured to receive signals from single-transmission-channel transmitters.

Claims

1. Apparatus for transmitting information over a coax network, the apparatus comprising:

a physical layer frequency domain signal preprocessor; and

a physical layer time domain signal transmitter that is configured to receive a signal from the preprocessor and transmit the signal over a coax medium that is in radio frequency communication with a plurality of network nodes, the transmitter having a first transmission channel configured to transmit a first portion of the signal during an identified time period and a second transmission channel configured to transmit a second portion of the signal during the identified time period.

2. The apparatus of claim 1 wherein, when the signal is a MoCA 2 signal, the transmitter is configured to transmit the MoCA 2 signal over the coax medium.

3. The apparatus of claim 1, further comprising a semiconductor chip, wherein:

the first and second channels are integral to the chip; and

the first channel is substantially parallel the second channel.

4. The apparatus of claim 1, wherein the first channel is on an identified MoCA band and the second channel is on the identified MoCA band.

5. The apparatus of claim 1, further comprising an oscillator, wherein:

the first channel is in communication with the oscillator;

the second channel is in communication with the oscillator;

the oscillator is configured to generate a timing signal;

the first channel transmits based on the timing signal; and

the second channel transmits based on the timing signal.

6. The apparatus of claim 5 wherein, when the first portion includes a first preamble and the second portion includes a second preamble:

the first channel is configured to transmit the first preamble in response to a trigger in the timing signal; and

the second channel is configured to transmit the second preamble in response to the trigger.

7. The apparatus of claim 1, wherein:

the first channel is configured to transmit the first portion at a first frequency;

the second channel is configured to transmit the second portion at a second frequency; and

the first frequency is different from the second frequency.

8. The apparatus of claim 1, further comprising a subcarrier mapper, wherein:

the subcarrier mapper is configured to define the first portion and the second portion based on bit loading.

9. The apparatus of claim 8 wherein:

the subcarrier mapper is configured to;

designate the first portion to a first subcarrier; and

designate the second portion to a second subcarrier; and

the first subcarrier corresponds to the first transmission channel; and

the second subcarrier corresponds to the second transmission channel.

10. The apparatus of claim 9 wherein the subcarrier mapper is configured to select, for each of the first and second portions, one of the first and second transmission channels.

11. The apparatus of claim 10 further comprising N −

2 additional transmission channels, such that the apparatus comprises N total transmission channels;

wherein the subcarrier mapper is configured to select the first and second transmission channels from among the N total transmission channels.

12. The apparatus of claim 11 wherein N equals at least one of 3, 4, or 6.

13. The apparatus of claim 1, wherein the first channel includes a BIN scrambler.

14. The apparatus of claim 13 wherein the first channel includes an OFDM modulator.

15. The apparatus of claim 14 wherein the first channel includes a filter.

16. The apparatus of claim 1, wherein the second channel includes a BIN scrambler.

17. The apparatus of claim 16 wherein the second channel includes an OFDM modulator.

18. The apparatus of claim 17 wherein the second channel includes a filter.

19. The apparatus of claim 1, further comprising a preprocessor output buffer in communication with the physical layer frequency domain signal preprocessor.

20. The apparatus of claim 19 wherein the buffer is configured to store a first output from the preprocessor, the first output corresponding to the first portion of the signal.

21. The apparatus of claim 20 further comprising control logic that is configured to transfer the first output from the buffer to the first channel at substantially a same time as the physical layer frequency domain signal preprocessor transfers a second output to the second transmission channel, the second output corresponding to the second portion of the signal.

22. An apparatus for transmitting information over a coax network, the apparatus comprising:

a Media Access Control (MAC) layer interface configured to provide a first portion of information packets to a first physical layer time domain signal transmitter and a second portion of the information packets to a second physical layer time domain signal transmitter;

the first physical layer time domain signal transmitter configured to receive the first portion of the information packets from the MAC layer interface, convert the first portion of the information packets into a first signal, and transmit the first signal comprising the first portion of the information packets over the coax network via a first radio frequency transmission channel; and

the second physical layer time domain transmitter configured to receive the second portion of the information packets from the MAC layer interface, convert the first portion of the information packets into the first signal, and transmit the second signal comprising the second portion of the information packets over the coax network via a second radio frequency transmission channel,

wherein a first clock of the first physical layer transmitter and a second clock of the second physical layer transmitter are derived from a common reference frequency.

23. The apparatus of claim 22, wherein the first radio frequency transmission channel comprises a first 100 MHz transmission spectrum and the second radio frequency transmission channel comprises a second 100 MHz transmission spectrum that is proximal to, but non-overlapping with, the first 100 MHz transmission spectrum.

24. A method for transmitting information over a coax network, the method comprising:

receiving, by a physical layer frequency domain signal preprocessor, information packets and converting the information packets into a signal;

receiving the signal by a physical layer time domain signal transmitter from the physical layer frequency domain signal preprocessor; and

transmitting, by the physical layer time domain signal transmitter, a first portion of the signal over the coax network via a first radio frequency transmission channel comprising a first transmission spectrum and a second portion of the signal over the coax network via a second radio frequency transmission channel comprising a second transmission spectrum that is proximal to but non-overlapping with the first transmission spectrum.

25. The method of claim 24, wherein the first transmission spectrum and the second transmission spectrum comprise 100 MHz transmission spectrums.