Method for seamlessly changing power modes in an adsl system
AssigneeIntellectual Ventures II LLC
InventorMarcos C. Tzannes
Life of this patent
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Abstract
A DMT system and method with the capability to adapt the system bit rate on-line in a seamless manner. The DMT system provides a robust and fast protocol for completing this seamless rate adaptation. The DMT system also provides a framing and encoding method with reduced overhead compared to conventional DMT systems. The DMT system and method provide seamless rate adaptation with the provision of different power levels. This framing and encoding method enables a system with seamless rate adaptation capability. The system and method of the invention can be implemented in hardware, or alternatively in a combination of hardware and software.
Claims18
1-16. (canceled)
In a multicarrier communication system, a method for seamlessly changing a bit rate for transmission or reception of a plurality of codewords, comprising:
- transmitting or receiving a message to change the bit rate from a first bit rate to a second bit rate;
- changing from use of a first bit allocation table corresponding to the first bit rate to use of a second bit allocation table corresponding to the second bit rate;
- and seamlessly transitioning to transmitting or receiving the plurality codewords at the second bit rate, wherein a fixed percentage of overhead data is maintained before and after the transition.
An apparatus, comprising:
- a physical communications interface,
- a transceiver coupled to the physical communications interface, the apparatus configured to:
- transmit or receive a message to change a bit rate for transmission or reception of a plurality of codewords from a first bit rate to a second bit rate, wherein the message is configured to indicate that use of a first bit allocation table corresponding to the first bit rate is to be switched to use of a second bit allocation table corresponding to the second bit rate;
- and
- seamlessly transition to transmit or receive the plurality codewords at the second bit rate, wherein a fixed percentage of overhead data is maintained before and after switch of the first bit allocation table to the second bit allocation table.
In a multicarrier communication system, a method for seamlessly changing a bit rate used to transmit a plurality of codewords from a first bit rate to a second bit rate, comprising:
- transmitting a message indicating that a first bit allocation table corresponding to the first bit rate is to be changed to a second bit allocation table corresponding to the second bit rate;
- and
- seamlessly transitioning to transmitting at the second bit rate, wherein a fixed percentage of overhead data is maintained before and after the transitioning.
Dependencies are inferred from the claim text.