Multicarrier transmission system with low power sleep mode and rapid-on capability
DC CAFCFirst Claim
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1. A multicarrier transceiver having a sleep mode capability, comprisingA. means responsive to a sleep mode command for:
- (1) storing selected state parameters characteristic of the communications channel over which the transceiver is operating; and
(2) reducing power to selected portions of transceiver circuitry;
andB. means responsive to a wake-up command for;
(1) restoring power to said transceiver;
(2) restoring the state of said transceiver from said sleep mode by means of said stored parameters; and
C. means for maintaining a common, synchronized data frame count between said transceiver and a remote transceiver with which it communicates, to thereby facilitate restoration of communication without reinitialization of said transceiver, wherein the state parameters include one or more parameters selected from the group comprising frequency-domain equalizer coefficients, time-domain equalizer coefficients, echo canceller coefficients, bit allocations, coding parameters, fine gains, and subchannel gains.
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Abstract
A multicarrier transceiver is provided with a sleep mode in which it idles with reduced power consumption when it is not needed to transmit or receive data. The full transmission and reception capabilities of the transceiver are quickly restored when needed, without requiring the full (and time-consuming) initialization commonly needed to restore such transceivers to operation after inactivity.
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Citations
10 Claims
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1. A multicarrier transceiver having a sleep mode capability, comprising
A. means responsive to a sleep mode command for: -
(1) storing selected state parameters characteristic of the communications channel over which the transceiver is operating; and (2) reducing power to selected portions of transceiver circuitry; and B. means responsive to a wake-up command for; (1) restoring power to said transceiver; (2) restoring the state of said transceiver from said sleep mode by means of said stored parameters; and C. means for maintaining a common, synchronized data frame count between said transceiver and a remote transceiver with which it communicates, to thereby facilitate restoration of communication without reinitialization of said transceiver, wherein the state parameters include one or more parameters selected from the group comprising frequency-domain equalizer coefficients, time-domain equalizer coefficients, echo canceller coefficients, bit allocations, coding parameters, fine gains, and subchannel gains. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of providing a sleep mode in a multicarrier transceiver characterized by a plurality of state parameters characteristic of the communications channel over which the transceiver is operating and requiring initialization of said parameters for normal communications, comprising the steps of:
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A. storing selected ones of said state parameters in response to a sleep mode command; B. reducing power to selected portions of the circuitry following said storing; C. restoring power to said selected portions in response to an awaken signal; and D. restoring the state of said transceiver from said stored parameters in response to said wakeup signal to thereby obviate reinitialization of said transceiver, wherein the state parameters include one or more parameters selected from the group comprising frequency-domain equalizer coefficients, time-domain equalizer coefficients, echo canceller coefficients, bit allocations, coding parameters, fine gains, and subchannel gains. - View Dependent Claims (10)
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Specification