Method and apparatus for dynamically changing the preamble length of a burst communication
First Claim
1. An apparatus for communicating with network elements comprising:
- a transmission unit capable of transmitting signals to network elements;
a receiver unit capable of receiving signals from the network elements; and
a microprocessor configured to adjust the length of preambles associated with a signal to be transmitted by the network elements to provide preambles of a first length to a first group of communication signals to be transmitted by the network elements and to provide preambles of a second length to a second group of communication signals to be transmitted by the network elements, wherein the first length is longer than the second length.
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Accused Products
Abstract
Preamble length of burst communication signals dynamically changed to compensate in changes to linear distortion of a communication channel. Pre-equalization coefficients are provided to network element which pre-equalize communications with the CMTS. Long preamble lengths are used for a select few communications while short preamble lengths are used for the rest of the communication signals. When change in distortion characteristics is detected, a station maintenance is performed on the affected network element and new pre-equalization coefficients are determined and provided to the network element. Alternatively, all communications may be provided with long preamble lengths and communications may continue while the CMTS determines new pre-equalization coefficients.
83 Citations
32 Claims
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1. An apparatus for communicating with network elements comprising:
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a transmission unit capable of transmitting signals to network elements;
a receiver unit capable of receiving signals from the network elements; and
a microprocessor configured to adjust the length of preambles associated with a signal to be transmitted by the network elements to provide preambles of a first length to a first group of communication signals to be transmitted by the network elements and to provide preambles of a second length to a second group of communication signals to be transmitted by the network elements, wherein the first length is longer than the second length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of communicating with network elements which perform pre-equalization using pre-equalization coefficients comprising the steps of:
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determining if the distortion characteristics of a network associated with an affected network element have changed; and
if the distortion characteristics have not changed, providing preambles of a first length to a first group of communication signals to be transmitted by the network elements and providing preambles of a second length to a second group of communication signals to be transmitted by the network elements, wherein the first length is longer than the second length. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A computer readable medium containing instructions for a computer to perform a method of communicating with network elements which perform pre-equalization using pre-equalization coefficients comprising the steps of:
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determining if the distortion characteristics of a network associated with an affected network element have changed; and
if the distortion characteristics have not changed, providing preambles of a first length to a first group of communication signals to be transmitted by the network elements and providing preambles of a second length to a second group of communication signals to be transmitted by the network elements, wherein the first length is longer than the second length. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification