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WO1998027665A1 - Appareil et procede de transmission de la parole et de donnees entre des installations d'abonnes et un central - Google Patents

Appareil et procede de transmission de la parole et de donnees entre des installations d'abonnes et un central Download PDF

Info

Publication number
WO1998027665A1
WO1998027665A1 PCT/US1997/022632 US9722632W WO9827665A1 WO 1998027665 A1 WO1998027665 A1 WO 1998027665A1 US 9722632 W US9722632 W US 9722632W WO 9827665 A1 WO9827665 A1 WO 9827665A1
Authority
WO
WIPO (PCT)
Prior art keywords
band
frequency
transmission
sensing
full
Prior art date
Application number
PCT/US1997/022632
Other languages
English (en)
Inventor
Gordon Bremer
Thomas Bingel
Original Assignee
Paradyne Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/962,796 external-priority patent/US6061392A/en
Application filed by Paradyne Corporation filed Critical Paradyne Corporation
Priority to JP52780298A priority Critical patent/JP2001526849A/ja
Priority to CA002272576A priority patent/CA2272576A1/fr
Publication of WO1998027665A1 publication Critical patent/WO1998027665A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/12—Arrangements for reducing cross-talk between channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data

Definitions

  • the present invention generally relates to modems, and more particularly to
  • High speed digital modems such as Rate Adaptive Digital Subscriber Loop
  • POTS Plain Old Telephone Service
  • POTS system generally occurs in the frequency spectrum between about 0 Hz ("DC")
  • RADSL modems use the frequency spectrum of between
  • High speed digital modems generally include error
  • detection circuitry which measures the errors which occur during communications.
  • the modems can select optimal
  • RADSL modems typically require the use of
  • PSTN Telephone Network
  • POTS filters and POTS splitters directly interfere with the RADSL
  • POTS filters and POTS splitters reduce POTS signaling transients from
  • the second line may
  • POTS e.g.. voice or PSTN modem
  • limiting condition includes both the detection of the onset of a condition indicating
  • data may be
  • voice or PSTN modem data information is communicated across the same local loop.
  • a significant aspect of the present invention is the dynamic allocation of the data
  • the invention dynamically allocates the data
  • the method senses an off-hook
  • a local loop extending between a customer premises and a central office
  • a modem constructed in accordance with the present invention may be
  • the off-hook condition is preferably sensed
  • transmission state is defined by a transmission frequency bandwidth having a lower
  • bandwidth has a lower frequency boundary of greater than 4 kilohertz.
  • invention senses that POTS information is being communicated across the local loop
  • boundan will be shifted upwardly to approximately 20 kilohertz, to allow sufficient
  • the upper boundary will generally be greater than 40 kilohertz. in order to define a
  • the upper frequency boundary is approximately 80 kilohertz.
  • premises wiring and subscriber loop stubs do not cause
  • the upper boundary may be shifted in conjunction with the shifting of the lower frequency
  • the upper frequency boundary may remain substantially
  • the spectral shape of the band-limited xDSL transmission may be
  • density of xDSL transmissions is generally greater than that of POTS transmissions.
  • band-limited transmission state may be further configured by reducing the power-
  • Another, related solution may be to uniquely shape
  • the spectral curve for xDSL transmissions This, for example, may be done by
  • a modem is
  • the modem includes an
  • the modem also includes a processor unit that is adapted for operation in one of two states: a full-band transmission state and a band-limited
  • the full-band transmission state is defined by a lower frequency
  • the modem is the upper frequency boundary for the full-band transmission state.
  • POTS mode e.g.. transmitting POTS information, or preparing to transmit POTS
  • the controller causes the
  • processor unit to upwardly shift the lower frequency boundary of the transmission
  • the controller causes the processor unit to downwardly shift the lower
  • the method comprises the steps of: (1 ) transmitting data between the
  • the customer premises and the central office in a first frequency band, wherein the first frequency band is defined by an upper frequency boundary and a lower frequency
  • the lower frequency boundary of the first frequency band shifted to at
  • the lower frequency boundary of the first frequency band is further shifted to
  • a modem is provided
  • a single PSTN voice call or a single data communication
  • the modem constructed in accordance with this aspect of the invention includes
  • processor unit adapted for operation in one of at least two states, a full-band
  • present invention operates by adjusting transmit power between a band-limited
  • FIG. 1 is an illustration of the frequency spectrum of a dual frequency band
  • FIG. 2 is a block diagram illustrating the primary components in a system
  • FIG. 3A is a frequency spectrum illustrating the full-band transmission
  • FIG. 3B is a frequency spectrum illustrating the band-limited transmission
  • FIG. 3C is a frequency spectrum illustrating a band-limited transmission
  • FIG. 3D is a frequency spectrum illustrating a band-limited transmission
  • FIG. 4 is a block diagram illustrating the primary components of a modem
  • FIG. 5 is a circuit diagram illustrating the analog front end component of the modem block diagram of FIG. 4;
  • FIG. 6 is a software flowchart depicting the operation of the functional
  • FIG. 7 is a software flowchart illustrating the top-level operation of a system
  • FIG. 1 is a diagram illustrating frequency band
  • frequency band frequency band
  • communications is used to indicate communication of information within a certain
  • POTS public switched telephone
  • a second transmission frequency band 14 is defined
  • a guard dead band 16 is transmitted of digital subscriber line (DSL) communications.
  • DSL digital subscriber line
  • DSL transmission frequency band 14 is more broadly denominated as "xDSL” .
  • xDSL transmission frequency bands 14 may encompass a bandwidth of
  • POTS filters such as POTS filters, splitters, etc.
  • xDSL signals are not compatible with attached POTS type equipment, such as telephones.
  • PSTN modems PSTN modems
  • the present invention provides an
  • upper frequency boundary of the present invention is defined in a range that is readily
  • FIG. 2. is a top level diagram illustrating the
  • a modem 20 is provided for achieving
  • the present invention dynamically allocates a data transmission frequency
  • PSD power spectral density
  • the present invention may utilize the
  • the customer premises 22 may be any customer premises 22.
  • the customer premises 22 may be any customer premises 22.
  • multiple telephones 30. and 32 may be plugged in and supported from the same phone
  • a personal computer may be disposed in communication
  • equipment 42 may also be in communication with the local loop 26. Since the configuration and operation of such equipment is known in the prior art and does not
  • FIG. 2 also
  • modem 40 constructed in accordance with the present invention. These services may be provided.
  • FIG. 3 A illustrates
  • FIG. 3B illustrates a data transmission frequency band 52 in a band-limited
  • band transmission frequency band 50 extends from approximately 0 Hz (DC) to
  • a modem 20 constructed in
  • the present invention may sense this demand for voice
  • this band-limiting condition may be detected by an impedance change on the local loop
  • the system may also be configured to detect voice conversation.
  • the system may increase transmit power as it shifts into the band-
  • band SNR is about 30 to 40 dB.
  • the system will again reduce the transmit power for
  • the data transmission frequency band of the present invention is often 1 MHz in width, the data transmission frequency band of the present
  • invention is its ability to sense when voice-band communications are not occurring, or
  • FIG. 3B kHz cutoff (FIG. 3B) to approximately DC (FIG. 3 A) realizes a 25 percent increase in bandwidth (i.e.. from 80 kHz to 100 kHz), and thus realize a significant improvement
  • FIGS. 3C and 3D illustrate alternative embodiments of the present invention.
  • FIGS. 3C and 3D illustrate a spectrally-shaped transmission curve
  • the power density of the xDSL transmission band is
  • Intermodulation products may also be manifest within
  • the POTS transmission band 12 as noise.
  • the specific amount of power reduction may vary among customer premises, based upon
  • spectrum of the xDSL transmission band 54 may be asymmetrically shaped to provide
  • FIG. 4. shows a block diagram of a modem
  • the modem 20 is in communication with both a local loop 26 and computing
  • TIP ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇
  • the TIP 62 and RING 64 lines are input to an analog front-end
  • circuit 66 (see FIG. 5) as well as a monitor circuit 68. which is configured to detect an
  • Analog to digital and digital to analog converter circuitry 70 is in
  • DTE interface 74 is in communication with the digital signal processor
  • the digital signal processing 72, and the DTE interface 74 are all well known and
  • controller 80 that is in communication with the various components
  • controller 80 one way, as illustrated, is to further partition the controller 80 into
  • a processing unit 82 functional units denoted as a central processing unit 82.
  • a memory 84 (which may further
  • controller 80 For purposes of the broad concepts of the present invention, the controller 80
  • the monitor circuitry 68 may be
  • the OFF-HOOK condition may be detected by a
  • the controller 80 evaluates the signal received on line 90 to determine
  • the digital signal processor 72 for formulating data transmissions (or interpreting
  • monitor circuitry 68 may be inco ⁇ orated within the controller 80.
  • processing unit 82 may be a microprocessor, a microcontroller, an application specific
  • ASIC integrated circuit
  • the controller 80 includes fundamental
  • processor unit controller, memory
  • Such operations may be controlled, for example, by
  • FIG. 5 shows a more detailed diagram of the
  • circuitry comprising the analog front-end 66.
  • the preferred embodiment includes
  • a transformer 106 couples alternating current to the remainder
  • a termination resistor 108 and switch 1 10 are disposed for
  • the switch 1 10 is controlled by controller 80 (FIG. 4) to close and
  • FIG. 2 are all ON-HOOK (as observed by the monitor circuit 68).
  • Capacitors 102 and 104 are chosen
  • the switch 1 10 is generally opened to switch out the terminating resistor
  • the switch 1 10 can be closed in the Off-HOOK state to
  • reference numeral 1 12 denotes circuitry that is
  • the current source is prompted by the transmit signal Tx to create an outgoing transmission signal.
  • the item 1 12 has a very high impedance (as seen across the secondary winding
  • amplifier 1 14 is the receive
  • the amplifier 1 14 has an extremely high input impedance and thus does not effect
  • FIG. 6 a software flow-chart illustrating the
  • step 120 If the resolution of step 120 is NO, the analog front-
  • end element 66 opens switch 1 12 (step 122) to remove the termination resistor 108
  • loop 26 is OFF-HOOK. it will remove the termination resistor 108 from the circuit.
  • step 122 wherein data is transmitted in accordance with the
  • band-limited transmission frequency band e.g., 20 kHz- 100 kHz.
  • the system may emit periodic tones
  • local loop 26 is also being used for data transmissions.
  • a person for example, a person, for example, a person, for example, a person, for example, a person, for example, a person, for example, a person, for example, a person, for example, a person, for example, a person, for example, a person, for example, a person, for example, a person, for example, a person, for example, a person, for example,
  • step 120 If the resolution of step 120 is YES, indicating that all telephones attached to
  • step 130 the system may transmit data across the local loop
  • FIG. 7 is a software flow-chart illustrating
  • This initiation may occur either upon the instruction of a user at the
  • step 146 e.g. , 20 kFIz - 100 kHz.
  • step 150 the band-limiting condition is generally identified by the OFF-HOOK detection circuitry. If the end data communications
  • step 148 resolves to YES. then the system returns to step 140. If not. the
  • step 150 it checks for the cessation of the band-limiting
  • step 154 transmission in the full-band transmission frequency bandwidth
  • step 154 it transmits data in accordance with the full-band data
  • step 156 checks to see if the data communications has terminated. or whether the
  • step 146 the system proceeds to step 146 and continues the data transmissions in
  • the invention utilizes the low frequency portion of the
  • the modulation could be CAP. QAM. DMT. spread spectrum.
  • the invention requires a simple bridge (electrical parallel) connection to

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Telephonic Communication Services (AREA)
  • Transceivers (AREA)
  • Communication Control (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

Cette invention se rapporte à un procédé et à un appareil permettant de transmettre des données (25) sur une liaison de communication (26), de manière à détecter la transmission simultanée de signaux vocaux (30, 32) et à s'adapter dynamiquement à cette transmission sur la ligne d'abonné. Dans une première réalisation, cette invention se rapporte à un procédé permettant de transmettre dynamiquement des données (25) sur une ligne d'abonné au moyen d'un modem (20), ledit procédé consistant à émettre les données dans un mode de transmission à largeur de bande totale, à détecter une condition de limitation de la largeur de bande, et à ajuster la transmission des données de manière à passer d'un mode de transmission à largeur de bande totale à un mode de transmission à largeur de bande limitée, en fonction du résultat de la détection. Un aspect important de la présente invention réside dans l'allocation dynamique de la largeur de la bande de transmission des données, ladite invention permettant de détecter une condition indiquant que des informations vocales (30, 32) sont en cours de transmission. Dans ce cas, le système décale et/ou rétrécit la largeur de la bande de transmission des données de manière à permettre la transmission des signaux vocaux sans interférence avec la transmission des données.
PCT/US1997/022632 1996-12-17 1997-12-04 Appareil et procede de transmission de la parole et de donnees entre des installations d'abonnes et un central WO1998027665A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP52780298A JP2001526849A (ja) 1996-12-17 1997-12-04 加入者構内と電話局間で音声及びデータを伝達するための装置及び方法
CA002272576A CA2272576A1 (fr) 1996-12-17 1997-12-04 Appareil et procede de transmission de la parole et de donnees entre des installations d'abonnes et un central

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US3366096P 1996-12-17 1996-12-17
US60/033,660 1996-12-17
US3439096P 1996-12-30 1996-12-30
US60/034,390 1996-12-30
US08/962,796 1997-11-03
US08/962,796 US6061392A (en) 1996-12-17 1997-11-03 Apparatus and method for communicating voice and data between a customer premises and a central office

Publications (1)

Publication Number Publication Date
WO1998027665A1 true WO1998027665A1 (fr) 1998-06-25

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Country Link
JP (1) JP2001526849A (fr)
CA (1) CA2272576A1 (fr)
WO (1) WO1998027665A1 (fr)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999018701A1 (fr) * 1997-10-03 1999-04-15 Conexant Systems, Inc. Systeme de communications de lignes numeriques d'abonnes sans diviseur
WO1999020027A3 (fr) * 1997-10-10 1999-08-05 Aware Inc Modem a porteuses multiples sans repartiteur
WO2000052920A1 (fr) * 1999-03-01 2000-09-08 Ericsson, Inc. Modem de ligne d'acces numerique, exempt de repartiteur
WO2001052465A1 (fr) * 2000-01-13 2001-07-19 Siemens Aktiengesellschaft Procede de selection de profils fast-retrain existants
US6266348B1 (en) 1997-10-10 2001-07-24 Aware, Inc. Splitterless multicarrier modem
US6498808B1 (en) 1999-03-12 2002-12-24 Aware, Inc. Seamless rate adaptive multicarrier modulation system and protocols
US6522666B1 (en) 1998-06-26 2003-02-18 Aware, Inc. Multicarrier communication with variable overhead rate
EP0952696A3 (fr) * 1998-04-22 2003-11-19 Lucent Technologies Inc. Procédé de communication de signaux modulé numériquement sur une bande de fréquence pour modulation en amplitude
WO2004015913A1 (fr) * 2002-08-12 2004-02-19 Smartlink Ltd. Modem multi-bande
US6748016B1 (en) 1999-07-16 2004-06-08 Aware, Inc. System and method for transmitting messages between transceivers using electromagnetically coupled signals
US6775320B1 (en) 1999-03-12 2004-08-10 Aware, Inc. Method and a multi-carrier transceiver supporting dynamic switching between active application sets
US6798735B1 (en) 1996-06-12 2004-09-28 Aware, Inc. Adaptive allocation for variable bandwidth multicarrier communication
EP1626563A1 (fr) * 2004-08-10 2006-02-15 Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO Multiplexeur d'acces DSL
US7151794B2 (en) 2002-08-14 2006-12-19 Smartlink Ltd. Modem channel sharing based on frequency division
EP1115215A3 (fr) * 2000-01-05 2007-08-22 Texas Instruments Incorporated Procédé et systéme pour la communication des données
EP1088442B1 (fr) * 1998-05-12 2009-03-25 Infineon Technologies AG Procede et systeme de fixation d'une connexion adsl
EP1024648A3 (fr) * 1999-01-15 2009-09-09 Texas Instruments Incorporated Système de Communication
US7860175B2 (en) 1999-03-12 2010-12-28 Tzannes Marcos C Method for seamlessly changing power modes in an ADSL system
US8031619B2 (en) 1997-10-10 2011-10-04 Daphimo Co., B.V., LLC Splitterless multicarrier modem

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Cited By (48)

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US6798735B1 (en) 1996-06-12 2004-09-28 Aware, Inc. Adaptive allocation for variable bandwidth multicarrier communication
US8767698B2 (en) 1996-06-12 2014-07-01 Intellectual Ventures Ii Llc Adaptive allocation for variable bandwidth multicarrier communication
US8369275B2 (en) 1996-06-12 2013-02-05 Daphimo Co. B.V., Llc Adaptive allocation for variable bandwidth multicarrier communication
US7817532B2 (en) 1996-06-12 2010-10-19 Marcos Tzannes Adaptive allocation for variable bandwidth multicarrier communication
US6101216A (en) * 1997-10-03 2000-08-08 Rockwell International Corporation Splitterless digital subscriber line communication system
WO1999018701A1 (fr) * 1997-10-03 1999-04-15 Conexant Systems, Inc. Systeme de communications de lignes numeriques d'abonnes sans diviseur
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AU763810C (en) * 1997-10-10 2004-07-15 Daphimo Co. B.V., Llc Splitterless multicarrier modem
WO1999020027A3 (fr) * 1997-10-10 1999-08-05 Aware Inc Modem a porteuses multiples sans repartiteur
US8400940B2 (en) 1997-10-10 2013-03-19 Daphimo Co., B.V., LLC Splitterless multicarrier modem
US6549520B1 (en) 1997-10-10 2003-04-15 Aware, Inc. Method and apparatus for varying power levels in a multicarrier modem
US8031619B2 (en) 1997-10-10 2011-10-04 Daphimo Co., B.V., LLC Splitterless multicarrier modem
AU763810B2 (en) * 1997-10-10 2003-07-31 Daphimo Co. B.V., Llc Splitterless multicarrier modem
EP2141847A1 (fr) * 1997-10-10 2010-01-06 Daphimo Co. B.V., LLC Modem multiporteur sans séparateur
AU744756B2 (en) * 1997-10-10 2002-03-07 Daphimo Co. B.V., Llc Splitterless multicarrier modem
US6266348B1 (en) 1997-10-10 2001-07-24 Aware, Inc. Splitterless multicarrier modem
EP0952696A3 (fr) * 1998-04-22 2003-11-19 Lucent Technologies Inc. Procédé de communication de signaux modulé numériquement sur une bande de fréquence pour modulation en amplitude
EP1088442B1 (fr) * 1998-05-12 2009-03-25 Infineon Technologies AG Procede et systeme de fixation d'une connexion adsl
US8718179B2 (en) 1998-06-26 2014-05-06 Intellectual Ventures Ii Llc Multicarrier communication with variable overhead rate
US6522666B1 (en) 1998-06-26 2003-02-18 Aware, Inc. Multicarrier communication with variable overhead rate
EP1024648A3 (fr) * 1999-01-15 2009-09-09 Texas Instruments Incorporated Système de Communication
US6324268B1 (en) 1999-03-01 2001-11-27 Ericsson Inc. Splitter-less digital subscriber loop modems with improved throughput and voice and data separation
WO2000052920A1 (fr) * 1999-03-01 2000-09-08 Ericsson, Inc. Modem de ligne d'acces numerique, exempt de repartiteur
US8340200B2 (en) 1999-03-12 2012-12-25 Daphimo Co. B.V., Llc Method for seamlessly changing power modes in an ADSL system
US8045603B2 (en) 1999-03-12 2011-10-25 Daphimo Co. B.V., Llc Method and a multi-carrier transceiver supporting dynamic switching between active application sets
US9369404B2 (en) 1999-03-12 2016-06-14 Intellectual Ventures Ii Llc Method and multi-carrier transceiver with stored application profiles for supporting multiple applications
US8934555B2 (en) 1999-03-12 2015-01-13 Intellectual Ventures Ii Llc Method and multi-carrier transceiver with stored application profiles for supporting multiple applications
US6498808B1 (en) 1999-03-12 2002-12-24 Aware, Inc. Seamless rate adaptive multicarrier modulation system and protocols
US6778596B1 (en) 1999-03-12 2004-08-17 Aware, Inc. Method and multi-carrier transceiver with stored application profiles for supporting multiple applications
US6667991B1 (en) 1999-03-12 2003-12-23 Aware, Inc. Method for synchronizing seamless rate adaptation
US7649928B2 (en) 1999-03-12 2010-01-19 Tzannes Marcos C Method for synchronizing seamless rate adaptation
US7813419B2 (en) 1999-03-12 2010-10-12 Tzannes Marcos C Method and multi-carrier transceiver with stored application profiles for supporting multiple applications
US7813418B2 (en) 1999-03-12 2010-10-12 Tzannes Marcos C Method and a multi-carrier transceiver supporting dynamic switching between active application sets
US8718163B2 (en) 1999-03-12 2014-05-06 Intellectual Ventures Ii Llc Method for seamlessly changing power modes in an ADSL system
US7860175B2 (en) 1999-03-12 2010-12-28 Tzannes Marcos C Method for seamlessly changing power modes in an ADSL system
US6567473B1 (en) 1999-03-12 2003-05-20 Aware, Inc. Method for seamlessly changing power modes in a ADSL system
US8351491B2 (en) 1999-03-12 2013-01-08 Daphimo Co. B.V., Llc Method and multi-carrier transceiver with stored application profiles for supporting multiple applications
US8045601B2 (en) 1999-03-12 2011-10-25 Daphimo Co. B.V., Llc Method for synchronizing seamless rate adaptation
US8340162B2 (en) 1999-03-12 2012-12-25 Daphimo Co. B.V., Llc Method for synchronizing seamless rate adaptation
US6775320B1 (en) 1999-03-12 2004-08-10 Aware, Inc. Method and a multi-carrier transceiver supporting dynamic switching between active application sets
US6748016B1 (en) 1999-07-16 2004-06-08 Aware, Inc. System and method for transmitting messages between transceivers using electromagnetically coupled signals
EP1115215A3 (fr) * 2000-01-05 2007-08-22 Texas Instruments Incorporated Procédé et systéme pour la communication des données
WO2001052465A1 (fr) * 2000-01-13 2001-07-19 Siemens Aktiengesellschaft Procede de selection de profils fast-retrain existants
US6934368B2 (en) 2002-08-12 2005-08-23 Smartlink Ltd. Multi-band modem
WO2004015913A1 (fr) * 2002-08-12 2004-02-19 Smartlink Ltd. Modem multi-bande
US7151794B2 (en) 2002-08-14 2006-12-19 Smartlink Ltd. Modem channel sharing based on frequency division
EP1626563A1 (fr) * 2004-08-10 2006-02-15 Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO Multiplexeur d'acces DSL
WO2006016810A1 (fr) * 2004-08-10 2006-02-16 Nederlandse Organisatie Voor Toegepast- Natuurwetenschappelijk Onderzoek Tno Multiplexeur d'acces dsl

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CA2272576A1 (fr) 1998-06-25
JP2001526849A (ja) 2001-12-18

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