# US 2014/0157028 A1 · Optimizing Power Consumption in a Communication System > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0157028 A1 - Document ID: US20140157028A1 - Status: Published application - Kind: A1 - Application number: 14/087,403 - Filed: 2013-11-22 - Published: 2014-06-05 - Earliest claimed: 2012-11-22 - Assignees: Lantiq Deutschland GmbH - Applicants: Lantiq Deutschland GmbH - Inventors: Dietmar Schoppmeier; Stefan Uhlemann - Web page: https://patentgrep.com/patent/US20140157028A1 ## CPC - G06F 1/3293: by switching to a less power-consuming processor, e.g. sub-CPU - H04L 5/0046: {Determination of the number of bits transmitted on different sub-channels} - H04M 11/062: {using different frequency bands for speech and other data} - H04W 52/288: {taking into account the usage mode, e.g. hands-free, data transmission or telephone} - H04B 17/336: Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract Within a communication system that includes multiple communication channels, a low-power mode of operation and a higher-power mode of operation are provided. Each channel is allocated to one of several groups, based on criteria such as whether power is allocated to that channel in low power mode, and whether power was allocated to that channel in a previous high power mode. Initial power levels for each channel for each mode are approximated using an interpolation rule known to both the receive and the transmitter. The system switches between modes according to a PMD pre-defined schedule. When a new power mode begins, the receiver measures signal power received on each channel and then transmits corrective information sufficient to allow adaptation of power levels to achieve PMD pre-defined levels of received power. ## Claims ### Claim 1 A method for communicating within a communication system that includes a plurality of communication channels operable to communicate bits of information in a high power mode of operation and operable to communicate bits of information in a low power mode of operation, the method comprising, for the low power mode of operation, selectively allocating power to a channel in the plurality of communication channels based on channel use during the high power mode of operation of the respective channel. ### Claim 2 (depends on 1) The method of claim 1, wherein selectively allocating the power comprises determining not to communicate any bits of information in the low power mode if in the high power mode of operation the respective channel does not communicate any bits of information. ### Claim 3 (depends on 1) The method of claim 1, wherein selectively allocating power comprises determining to enable measurement of a signal-to-noise ratio in the low power mode. ### Claim 4 (depends on 3) The method of claim 3, wherein the measurement in low power mode is intermittent. ### Claim 5 (depends on 4) The method of claim 4, wherein the measurement is cyclically intermittent. ### Claim 6 (depends on 5) The method of claim 5, wherein at least two respective channels determined to enable intermittent measurement of the signal-to-noise ratio in the low power mode form a group, and wherein power allocated to channels in the group is allocated to one channel in the group at a time. ### Claim 7 (depends on 3) The method of claim 3, wherein measurement of a signal-to-noise ratio comprises performing a Fourier transformation and wherein a number of frequencies used in the Fourier transformation varies with a maximum frequency used for the signal-to-noise ratio measurement in the plurality of communication channels. ### Claim 8 (depends on 7) The method of claim 7, wherein the number of frequencies used in the Fourier transformation varies proportionally to the maximum frequency used for the signal-to-noise ratio measurement in the plurality of communication channels. ### Claim 9 (depends on 1) The method of claim 1, further comprising determining to enable communication of at least one bit of information in the low power mode of operation per predetermined unit of time if in the high power mode of operation the respective channel communicates bits of information. ### Claim 10 (depends on 1) The method of claim 1, wherein the power allocated in the respective channel during the low power mode of operation is commensurate with the determining for the selected channel. ### Claim 11 (depends on 1) The method of claim 1, wherein the high power mode of operation of the respective channel immediately precedes the low power mode of operation of the respective channel. ### Claim 12 A non-transitory computer readable medium storing software that, when executed on one or more processors in a communication system that includes a plurality of communication channels operable to communicate bits of information in a high power mode of operation and operable to communicate bits of information in a low power mode of operation, causes, for the low power mode of operation, selectively allocating power to a channel in the plurality of communication channels based on channel use during the high power mode of operation of the respective channel. ### Claim 13 (depends on 12) The non-transitory computer readable medium of claim 12, wherein the power is selectively allocated by determining not to communicate any bits of information in the low power mode if in the high power mode of operation the respective channel does not communicate any bits of information. ### Claim 14 An apparatus for use in a communications system having a plurality of communication channels operable to communicate bits of information in a high power mode of operation and operable to communicate bits of information in a low power mode of operation, the apparatus comprising circuitry configured, for the low power mode of operation, to selectively allocate power to a channel in the plurality of communication channels based on channel use during the high power mode of operation of the respective channel. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the circuitry is configured to selectively allocate the power by determining not to communicate any bits of information in the low power mode if in the high power mode of operation the respective channel does not communicate any bits of information. ### Claim 16 (depends on 14) The apparatus of claim 14, wherein the circuitry is configured to selectively allocate the power by enabling measurement of a signal-to-noise ratio in the low power mode. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the measurement is cyclically intermittent. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein at least two respective channels determined to enable intermittent measurement of the signal-to-noise ratio in the low power mode form a group, the circuitry further being configured to allocate power to channels in the group to one channel in the group at a time. ### Claim 19 (depends on 14) The apparatus of claim 14, wherein the circuitry is further configured to perform, in measurement of a signal-to-noise ratio, a Fourier transformation, wherein a number of frequencies used in the Fourier transformation varies with a maximum frequency used for the signal-to-noise ratio measurement in the plurality of communication channels. ### Claim 20 (depends on 19) The apparatus of claim 19, wherein the number of frequencies used in the Fourier transformation varies proportionally to the maximum frequency used for the signal-to-noise ratio measurement in the plurality of communication channels.