Method and system for a high capacity cable network
First Claim
1. A cable modem termination system (CMTS), wherein the CMTS comprises:
- a receiver operable to sort a plurality of orthogonal frequency division multiplexed (OFDM) subcarriers into a first subset of one or more OFDM subcarriers and a second subset of one or more OFDM subcarriers, wherein the sorting is based on a physical layer parameter measured on each of the plurality of OFDM subcarriers; and
a transmitter operable to send a data packet on the first subset of one or more OFDM subcarriers and operable to send an error correction packet, associated with the data packet, on the second subset of one or more OFDM subcarriers, wherein a signal-to-noise ratio (SNR) on the first subset of one or more OFDM subcarriers is less than an SNR on the second subset of one or more OFDM subcarriers.
5 Assignments
0 Petitions
Accused Products
Abstract
A cable modem termination system (CMTS) may communicate with a plurality of cable modems using a plurality of orthogonal frequency division multiplexed (OFDM) subcarriers. The CMTS may determine a performance metric of each of the cable modems. For each of the OFDM subcarriers and each of the cable modems, the CMTS may select physical layer parameters to be used for communication with that cable modem on that OFDM subcarrier based on a performance metric of that cable modem. The parameters may be selected for each individual modem and/or each individual subcarrier, or may be selected for groups of modems and/or groups of subcarriers. The parameters may include, for example, one or more of: transmit power, receive sensitivity, timeslot duration, modulation type, modulation order, forward error correction (FEC) type, and FEC code rate.
28 Citations
20 Claims
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1. A cable modem termination system (CMTS), wherein the CMTS comprises:
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a receiver operable to sort a plurality of orthogonal frequency division multiplexed (OFDM) subcarriers into a first subset of one or more OFDM subcarriers and a second subset of one or more OFDM subcarriers, wherein the sorting is based on a physical layer parameter measured on each of the plurality of OFDM subcarriers; and a transmitter operable to send a data packet on the first subset of one or more OFDM subcarriers and operable to send an error correction packet, associated with the data packet, on the second subset of one or more OFDM subcarriers, wherein a signal-to-noise ratio (SNR) on the first subset of one or more OFDM subcarriers is less than an SNR on the second subset of one or more OFDM subcarriers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for communication, wherein the method comprises:
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measuring a performance parameter on each of a plurality of orthogonal frequency division multiplexed (OFDM) subcarriers; sorting the plurality of OFDM subcarriers into a first subset of one or more OFDM subcarriers and a second subset of one or more OFDM subcarriers, wherein the sorting is based on the performance parameter measured on each of the plurality of OFDM subcarriers; and adjusting a physical layer parameter on the plurality of OFDM subcarriers based on the measured performance parameters, wherein the physical layer parameter on the first subset of one or more OFDM subcarriers has a different value than the physical layer parameter on the second subset of one or more OFDM subcarriers; transmitting a data packet on the first subset of one or more OFDM subcarriers; and transmitting an error correction packet, associated with the data packet, on the second subset of one or more OFDM subcarriers. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification