Method and apparatus for adaptive, variable bandwidth, high-speed data transmission of a multicarrier signal over digital subscriber lines

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United States of America Patent

PATENT NO 5479447
SERIAL NO

08057301

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method and apparatus for adaptive, variable bandwidth, high-speed data transmission of a multicarrier signal over digital subscriber lines wherein the initial optimal transmission bandwidth is identified based on initial signal-to-noise ratio (SNR) estimates of the orthogonal carriers of the multicarrier system. Maximum data throughput, or system performance margin, is achieved by assigning the total amount of information, or number of bits, to be transmitted in each multicarrier symbol to particular carriers through an initial bit allocation procedure, which is possibly subject to variable target bit error rates among the carriers. A transmit power mask, of any shape and level, is imposed upon the system by an initial energy allocation procedure that limits the maximum amount of power to be transmitted in each of the several carriers. Lastly, run-time adaptivity is achieved by monitoring the mean-squared-errors (MSE) of the orthogonal carriers, and the transmission bandwidth, as well as the bit allocation within the multicarrier symbol, is caused to change in real-time corresponding to changes in the channel characteristics in order to maintain optimal system performance.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITYPALO ALTO, CA2370

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chow, Peter S Redwood City, CA 4 1142
Cioffi, John M Cupertino, CA 84 4292

Cited Art Landscape

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6498808 Seamless rate adaptive multicarrier modulation system and protocols 59 2000
6424636 Variable rate and variable mode transmission system 60 2000
6549520 Method and apparatus for varying power levels in a multicarrier modem 48 2000
6452925 Universal access multimedia data network 270 2000
6778596 Method and multi-carrier transceiver with stored application profiles for supporting multiple applications 45 2000
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7272171 Variable state length initialization 2 2003
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8718179 Multicarrier communication with variable overhead rate 0 2006
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7649928 Method for synchronizing seamless rate adaptation 8 2007
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* 2008/0037,666 METHOD FOR SEAMLESSLY CHANGING POWER MODES IN AN ADSL SYSTEM 5 2007
7826545 Variable state length initialization 0 2007
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7813418 Method and a multi-carrier transceiver supporting dynamic switching between active application sets 7 2008
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7813419 Method and multi-carrier transceiver with stored application profiles for supporting multiple applications 0 2008
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8031619 Splitterless multicarrier modem 2 2009
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8218664 Bit allocation among carriers in multicarrier communications 0 2010
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8340200 Method for seamlessly changing power modes in an ADSL system 1 2010
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8400940 Splitterless multicarrier modem 0 2011
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8718163 Method for seamlessly changing power modes in an ADSL system 0 2012
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ASSIA SPE LLC, C/O THE CORPORATION TRUST COMPANY (23)
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7809116 DSL system estimation including known DSL line scanning and bad splice detection capability 14 2005
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6694470 Retransmission procedure and apparatus for handshaking protocol 27 2000
6934326 Activation of multiple xDSL modems with implicit channel probe 2 2002
6768772 Activation of multiple xDSL modems with implicit channel probe 6 2002
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6765957 Activation of multiple xDSL modems with implicit channel probe 9 2002
6999506 Activation of multiple xDSL modems with half duplex and full duplex procedures 2 2003
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7508867 Activation of multiple xDSL modems with implicit channel probe 1 2004
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6512764 Method and apparatus for providing voice signals to and from a telecommunications switch 29 1999
7099310 Method and apparatus for providing voice signals to and from a telecommunications switch 3 2000
6512762 System and method for communicating telecommunication information between customer premises equipment and network equipment 17 2000
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7675900 System and method for interfacing between signaling protocols 6 2000
6839342 System and method for interfacing signaling information and voice traffic 18 2000
7385963 System and method for communicating telecommunication information from a telecommunication network to a broadband network 6 2000
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6754221 System and method for selecting a compression algorithm according to an available bandwidth 103 2001
7149182 System and method for providing lifeline telecommunication service 51 2001
6526046 System and method for communicating telecommunication information using asynchronous transfer mode 18 2001
6996134 System and method for reliably communicating telecommunication information 56 2001
7245583 System and method for providing lifeline telecommunication service to line-powered customer premises equipment 3 2001
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ZHIGU HOLDINGS LIMITED (4)
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EMBARQ HOLDINGS COMPANY, LLC (35)
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8576722 System and method for modifying connectivity fault management packets 24 2007
8549405 System and method for displaying a graphical representation of a network to identify nodes and node segments on the network that are not operating normally 29 2007
8488447 System and method for adjusting code speed in a transmission path during call set-up due to reduced transmission performance 30 2007
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8274905 System and method for displaying a graph representative of network performance over a time period 58 2007
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8199653 System and method for communicating network performance information over a packet network 51 2007
8194555 System and method for using distributed network performance information tables to manage network communications 50 2007
8144586 System and method for controlling network bandwidth with a connection admission control engine 4 2007
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8130793 System and method for enabling reciprocal billing for different types of communications over a packet network 155 2007
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8107366 System and method for using centralized network performance tables to manage network communications 53 2007
8102770 System and method for monitoring and optimizing network performance with vector performance tables and engines 54 2007
8098579 System and method for adjusting the window size of a TCP packet through remote network elements 163 2007
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8249051 Method and system for adaptively obtaining bandwidth allocation requests 23 2008
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8462809 Method and system for adaptively obtaining bandwidth allocation requests 0 2009
8462810 Method and system for adaptively obtaining bandwidth allocation requests 0 2009
8320406 Method and system for adaptively obtaining bandwidth allocation requests 0 2009
* 2009/0207,795 METHOD AND SYSTEM FOR ADAPTIVELY OBTAINING BANDWIDTH ALLOCATION REQUESTS 30 2009
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8315640 Methods and systems for transmission of multiple modulated signals over wireless networks 2 2009
8027298 Methods and systems for transmission of multiple modulated signals over wireless networks 23 2009
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8665898 Method and system for adaptively obtaining bandwidth allocation requests 0 2010
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8654664 Methods and systems for transmission of multiple modulated signals over wireless networks 0 2011
8462723 Methods and systems for transmission of multiple modulated signals over wireless networks 0 2011
8249014 Methods and systems for transmission of multiple modulated signals over wireless networks 23 2011
8457061 Method and system for adaptively obtaining bandwidth allocation requests 0 2011
8615020 Method and system for adaptively obtaining bandwidth allocation requests 0 2011
8462761 Method and system for adaptively obtaining bandwidth allocation requests 0 2011
8457145 Method and apparatus for bandwidth request/grant protocols in a wireless communication system 0 2012
8787924 Methods and systems for transmission of multiple modulated signals over wireless networks 0 2012
9591639 Method and apparatus for bandwidth request/grant protocols in a wireless communication system 0 2013
9351300 Method and apparatus for bandwidth request/grant protocols in a wireless communication system 0 2013
8929905 Methods and systems for transmission of multiple modulated signals over wireless networks 0 2013
9603129 Methods and systems for transmission of multiple modulated signals over wireless networks 0 2014
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9420573 Methods and systems for transmission of multiple modulated signals over wireless networks 0 2014
9414368 Methods and systems for transmission of multiple modulated signals over wireless networks 0 2014
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9420574 Methods and systems for transmission of multiple modulated signals over wireless networks 0 2015
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9603145 Method and apparatus for bandwidth request/grant protocols in a wireless communication system 0 2016
 
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8537695 System and method for establishing a call being received by a trunk on a packet network 31 2007
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8223655 System and method for provisioning resources of a packet network based on collected network performance information 77 2007
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8015294 Pin-hole firewall for communicating data packets on a packet network 69 2007
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7843831 System and method for routing data on a packet network 101 2007
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8374090 System and method for routing data on a packet network 159 2010
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