System and method for controlling line driver power in digital subscriber line modems
First Claim
Patent Images
1. A circuit card comprising:
- a plurality of DSL (Digital Subscriber Line) modem transmitters, each of the plurality of DSL modem transmitters includingfirst means for generating a full power physical frame when the DSL modem transmitter is provided with data to transmit, the full power physical frame including a control channel signal component and a data signal component;
a control channel generating circuit responsive to the first means and operable to generate a control signal when the DSL modem transmitter has no data to transmit;
second means for generating a low power physical frame having a control channel signal component and no data; and
third means responsive to the control signal for selecting between the full power physical frame and the low power physical frame for transmission from the DSL modem transmitter, wherein selection of the low power physical frame for transmission from the DSL modem transmitter is based only on the DSL modem transmitter having no data to transmit; and
a network processor to limit aggregate flow of data to the plurality of DSL modem transmitters such that a total power required by the plurality of DSL modem transmitters is held below a predefined target power level.
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Abstract
A low power DSL modem transmitter, suitable for incorporation in integrated DSLAM server line cards, transmits full power physical frames which include a control channel and a data field when data is available for transmission and physical frames having only a control channel or a control channel and a low power synchronization field when data is not available for transmission. And a method for controlling the total power dissipated in the integrated DSLAM by selectively restricting the flaw of data packets to the DSLs.
18 Citations
10 Claims
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1. A circuit card comprising:
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a plurality of DSL (Digital Subscriber Line) modem transmitters, each of the plurality of DSL modem transmitters including first means for generating a full power physical frame when the DSL modem transmitter is provided with data to transmit, the full power physical frame including a control channel signal component and a data signal component; a control channel generating circuit responsive to the first means and operable to generate a control signal when the DSL modem transmitter has no data to transmit; second means for generating a low power physical frame having a control channel signal component and no data; and third means responsive to the control signal for selecting between the full power physical frame and the low power physical frame for transmission from the DSL modem transmitter, wherein selection of the low power physical frame for transmission from the DSL modem transmitter is based only on the DSL modem transmitter having no data to transmit; and a network processor to limit aggregate flow of data to the plurality of DSL modem transmitters such that a total power required by the plurality of DSL modem transmitters is held below a predefined target power level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification