Source: http://www.google.com/patents/US7649928?dq=georgia+pacific+dispenser&ei=3350T6jaCc-q0AHQucGAAw
Timestamp: 2015-04-26 08:35:55
Document Index: 105522586

Matched Legal Cases: ['Application No. 09', 'art 400', 'art 500', 'art 600', 'art 700', 'Application No. 2007', 'Application No. 2000', 'Application No. 2001', 'Application No. 2007', 'Application No. 2007']

Patent US7649928 - Method for synchronizing seamless rate adaptation - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA Discrete Multitone Modulation (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...http://www.google.com/patents/US7649928?utm_source=gb-gplus-sharePatent US7649928 - Method for synchronizing seamless rate adaptationAdvanced Patent SearchPublication numberUS7649928 B2Publication typeGrantApplication numberUS 11/678,388Publication dateJan 19, 2010Filing dateFeb 23, 2007Priority dateMar 12, 1999Fee statusPaidAlso published asCA2369110A1, CA2369110C, DE1161820T1, DE60027414D1, DE60027414T2, DE60039081D1, EP1161820A1, EP1161820B1, EP1694020A1, EP1694020B1, EP1956785A1, EP1956785B1, US6498808, US6567473, US6667991, US8045601, US8340162, US20020181609, US20030112884, US20040057528, US20070133705, US20100111148, US20120093172, WO2000054473A1, WO2000054473A9Publication number11678388, 678388, US 7649928 B2, US 7649928B2, US-B2-7649928, US7649928 B2, US7649928B2InventorsMarcos C. TzannesOriginal AssigneeTzannes Marcos CExport CitationBiBTeX, EndNote, RefManPatent Citations (93), Non-Patent Citations (73), Referenced by (9), Classifications (51), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetMethod for synchronizing seamless rate adaptation
This application is a continuation application of Application Ser. No. 10/663,801filed Sep. 17, 2003 now abandoned. Application Ser. No. 10/663,801 is a continuation application of Application Ser. No. 09/523,086 filed Mar. 10, 2000 now U.S. Pat. No. 6,667,991. Application No. 09/523,086 claims the benefit of and priority to U.S. provisional application Ser. No. 60/124,222, filed Mar. 12, 1999, entitled �Seamless Rate Adaptive (SRA) ADSL System�, U.S. provisional application Ser. No. 60/161,115, filed Oct. 22, 1999, entitled �Multicarrier System with Stored Application Profiles�, and U.S. provisional application Ser. No. 60/177,081, filed Jan. 19, 2000, entitled �Seamless Rate Adaptive (SRA) Multicarrier Modulation System and Protocols,� which copending provisional applications are incorporated herein by reference in their entirety.
1. During initialization the transmitter and the receiver exchange information describing their maximum and minimum data rate capabilities. This corresponds to the maximum and minimum number of bits per DMT symbol. 2. During operation, the receiver determines that the data rate should be increased or decreased. 3. If the new data rate is within the transmitter's rate capabilities, the receiver proceeds to step 4. 4. The receiver sends the new BAT and the new data rate to the transmitter using the AOC or EOC channel. This corresponds to �NSRA Request� by the receiver. 5. The transmitter receives the �NSRA Request�. 6. The transmitter uses an inverted synchronization (sync) symbol as a flag to signal the receiver that the new BAT is going to be used. The new BAT is used for transmission on the first frame, or a finite number of frames, following the inverted sync symbol. The inverted sync symbol operates as a rate adaptation �SRA Go� message sent by the transmitter. 7. The receiver detects the inverted sync symbol (�SRA Go�) and the new BAT is used for reception on the first frame, or a finite number of frames, following the inverted sync symbol. FIG. 4 shows a flow chart 400 depicting an embodiment of a process in which a Normal Seamless Rate Adaptive (NSRA) transmission bit rate change is initiated by a receiver according to the principles of the invention. In FIG. 4, the steps described in action boxes 410 through 470 correspond to the preceding discussion.
1. During initialization the transmitter and the receiver exchange information describing their maximum and minimum capabilities regarding data rate. This corresponds to the maximum and minimum number of bits per DMT symbol. 2. The transmitter determines that the data rate should be increased or decreased. 3. if the new desired data rate is within the receiver's rate capability then the transmitter proceeds to step 4. 4. The transmitter sends to the receiver the new desired data rate using the EOC or AOC channel. This is an �NSRA Request� message. 5. The receiver receives the NSRA request message. If the channel can support the new data rate then the receiver proceeds to step 6. If the channel can not support the new data rate then the receiver sends an �SRA Deny� message back to the transmitter using the EOC or AOC channel. 6. The receiver sends the new BAT to the transmitter using the AOC or EOC channel based on the new data rate. This corresponds to an �NSRA Grant� request by the receiver. 7. The transmitter receives the �NSRA Grant�. 8. The transmitter uses an inverted sync symbol as a flag to signal the receiver that the new BAT is going to be used. The new table is used for transmission on the first frame, or a finite number of frames, following the inverted sync symbol. The inverted sync signal operates as a rate adaptation �SRA Go� message sent by the transmitter. 9. The receiver detects the inverted sync symbol (�SRA Go�) and the new table is used for reception on the first frame, or a finite number of frames, following the inverted sync symbol. FIG. 5 shows a flow chart 500 depicting an embodiment of a process in which a Normal Seamless Rate Adaptive (NSRA) transmission bit rate change is initiated by a transmitter according to the principles of the invention. In FIG. 5, the steps described in action boxes 510 through 590 correspond to the preceding discussion.
The protocol of the invention is robust because, unlike conventional rate adaptation techniques, the �SRA Go� message is not sent via an EOC or AOC message that can easily be corrupted. Instead the grant of the rate adaptation request is communicated via an inverted sync symbol. The sync symbol is defined in the ANSI and ITU standards as fixed non-data carrying DMT symbol that is transmitted every 69 symbols. The sync symbol is constructed by modulating all the DMT carriers with a predefined PN sequence using basic QPSK (2 bit QAM) modulation. This signal, which is used throughout the modem initialization process, has special autocorrelation properties that make possible the detection of the sync symbol and the inverted sync symbol even in highly noisy environments. An inverted sync symbol is a sync symbol in which the phase information in the QAM signal is shifted by 180 degrees. Other phase shifts (other than 180 degrees) of the sync symbol can be used as well for the SRA Go message. Using the sync symbol for the �SRA Go� message makes the rate adaptation protocol very robust even in the noisiest environments.
1. The receiver determines that the data rate should be increased or decreased. 2. If a stored BAT matches the new channel and/or application condition the receiver proceeds to step 3. If there is no stored BAT that matches the condition, an NSRA is initiated (as described above). 3. The receiver sends a message to the transmitter specifying which stored BAT is to be used for transmission based on the new channel and/or application condition. This corresponds to an �FSRA Request� by the receiver. 4. The transmitter receives the �FSRA Request�. 5. The transmitter uses an inverted sync symbol as a flag to signal the receiver that the requested stored BAT will be used for transmission. The stored BAT is used for transmission on the first frame, or a finite number of frames, following the inverted sync symbol. The inverted sync signal corresponds to a rate adaptation �SRA Go� message sent by the transmitter. 6. The receiver detects the inverted sync symbol (�SRA Go�) and the new BAT is used for reception on the first frame, or a finite number of frames, following the inverted sync symbol. FIG. 6 shows a flow chart 600 depicting an embodiment of a process in which a Fast Seamless Rate Adaptive (FSRA) transmission bit rate change is initiated by a receiver according to the principles of the invention. In FIG. 6, the steps described in action boxes 610 through 660 correspond to the preceding discussion.
1. The transmitter determines that the data rate should be increased or decreased. 2. If a stored BAT matches the new channel or/and application condition, the transmitter proceeds to step 3. If there are no stored BAT that matches the condition then an NSRA is initiated (as described above). 3. The transmitter sends a message to the receiver specifying which stored BAT is to be used for transmission, based on the new channel and/or application condition. This corresponds to an �FSRA Request� by the transmitter. 4. The receiver receives the �FSRA Request�. 5. The receiver sends back to the transmitter the �FSRA Grant� message to grant the �FSRA request�. 6. The transmitter receives the �FSRA Grant�. 7. The transmitter uses an inverted sync symbol as a flag to signal the receiver that the requested stored BAT will be used for transmission. The specified stored BAT is used for transmission on the first frame, or a finite number of frames, following the inverted sync symbol. The inverted sync signal corresponds to a rate adaptation �SRA Go� message sent by the transmitter. 8. The receiver detects the inverted sync symbol (�SRA Go�) and the new BAT is used for reception on the first frame, or a finite number of frames, following the inverted sync symbol. FIG. 7 shows a flow chart 700 depicting an embodiment of a process in which a Fast Seamless Rate Adaptive (FSRA) transmission bit rate change is initiated by a transmitter according to the principles of the invention. In FIG. 7, the steps described in action boxes 710 through 780 correspond to the preceding discussion.
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TzannesMethod for seamlessly changing power modes in an adsl system* Cited by examinerClassifications U.S. Classification375/219, 375/222International ClassificationH04L12/56, H04J11/00, H04M11/06, H04L1/00, H04L27/26, H04B1/38Cooperative ClassificationY02B60/31, H04L47/18, H04L27/2608, H04L5/0094, H04L47/10, H04L1/0025, H04L5/1446, H04L5/0046, H04L1/0057, H04L1/004, H04L5/0053, H04M11/062, H04L47/263, H04L5/0007, H04L27/2601, H04L1/0016, H04L1/0002, H04L1/0041, H04L1/0075, H04L1/0071, H04L5/006, H04L1/0009, H04L5/0064European ClassificationH04L1/00B, H04L1/00A5, H04L1/00B7B, H04L1/00B7V, H04L1/00B11, H04L47/18, H04L1/00B3, H04L27/26M1P, H04L5/00C7A, H04L5/00C6, H04L1/00A9A, H04L47/26A, H04M11/06B, H04L47/10, H04L5/00C7C, H04L5/00E2, H04L5/00C4A, H04L5/14R1, H04L27/26M, H04L1/00A1Legal EventsDateCodeEventDescriptionMar 18, 2013FPAYFee paymentYear of fee payment: 4Jan 25, 2013ASAssignmentOwner name: INTELLECTUAL VENTURES II LLC, DELAWAREFree format text: MERGER;ASSIGNOR:DAPHIMO CO. B.V., LLC;REEL/FRAME:029697/0829Effective date: 20130124Sep 2, 2011ASAssignmentEffective date: 20000628Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TZANNES, MARCOS C.;REEL/FRAME:026850/0024Owner name: AWARE, INC., MASSACHUSETTSMay 18, 2010CCCertificate of correctionFeb 16, 2009ASAssignmentOwner name: DAPHIMO CO. B.V., LLC, DELAWAREFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AWARE, INC.;REEL/FRAME:022259/0569Effective date: 20081219RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services