Method and apparatus for establishing communication in a multi-tone data transmission system
First Claim
1. In a bi-directional data transmission system that facilitates communications between a plurality of remote units and a central unit using a symbol-based discrete multitone transmission scheme that has a multiplicity of discrete sub-channels provided for facilitating upstream communications between the plurality of remote units and the central unit, a method of informing the central unit of the transmission requirements of a remote unit, the method comprising the steps of:
- transmitting, using a fast access transmission mode, a communication access request from a selected first remote unit to the central unit, the communication access request comprising a unique remote unit identifier identifying the selected first remote unit and being transmitted from the selected first remote unit on at least one unused sub-channel using a modulation scheme that does not require equalization to decode at the central unit; and
allocating at least one sub-channel to the selected first remote unit in response to the communication access request for facilitating upstream communications between the selected first remote unit and the central unit.
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Accused Products
Abstract
Apparatus and methods for informing the central unit of the transmission requirements of a remote unit in a bi-directional data transmission system that facilitates communications between a central unit and a plurality of remote units using a frame based discrete multi-tone (DMT) transmission scheme. The method includes the step of transmitting, using a fast access transmission mode, a communication access request from a selected first remote unit to the central unit during any symbol period. The communication access request includes a unique remote unit identifier associated with the selected first remote unit and is transmitted from the selected first remote unit on at least one unused sub-channel using a modulation scheme that does not require equalization to decode at the central unit. The method further includes the step of allocating at least one sub-channel to the selected first remote unit in response to the communication access request for facilitating upstream communications between the selected first remote unit and the central unit.
218 Citations
13 Claims
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1. In a bi-directional data transmission system that facilitates communications between a plurality of remote units and a central unit using a symbol-based discrete multitone transmission scheme that has a multiplicity of discrete sub-channels provided for facilitating upstream communications between the plurality of remote units and the central unit, a method of informing the central unit of the transmission requirements of a remote unit, the method comprising the steps of:
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transmitting, using a fast access transmission mode, a communication access request from a selected first remote unit to the central unit, the communication access request comprising a unique remote unit identifier identifying the selected first remote unit and being transmitted from the selected first remote unit on at least one unused sub-channel using a modulation scheme that does not require equalization to decode at the central unit; and allocating at least one sub-channel to the selected first remote unit in response to the communication access request for facilitating upstream communications between the selected first remote unit and the central unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification