WO2001037534A3 - Automatic data rate selection in dsl modems - Google Patents

Automatic data rate selection in dsl modems Download PDF

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Publication number
WO2001037534A3
WO2001037534A3 PCT/US2000/041700 US0041700W WO0137534A3 WO 2001037534 A3 WO2001037534 A3 WO 2001037534A3 US 0041700 W US0041700 W US 0041700W WO 0137534 A3 WO0137534 A3 WO 0137534A3
Authority
WO
WIPO (PCT)
Prior art keywords
dtu
data rate
line quality
transmits
probe signal
Prior art date
Application number
PCT/US2000/041700
Other languages
French (fr)
Other versions
WO2001037534A2 (en
Inventor
Ralph F Sweitzer
Dean E Rasmussen
Mickey C Rushing
Original Assignee
Conexant Systems Inc
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 US09/629,565 external-priority patent/US6546046B1/en
Priority claimed from US09/629,563 external-priority patent/US6570915B1/en
Priority claimed from US09/629,564 external-priority patent/US6535551B1/en
Application filed by Conexant Systems Inc filed Critical Conexant Systems Inc
Priority to EP00990460A priority Critical patent/EP1230758A2/en
Publication of WO2001037534A2 publication Critical patent/WO2001037534A2/en
Publication of WO2001037534A3 publication Critical patent/WO2001037534A3/en

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
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1438—Negotiation of transmission parameters prior to communication
    • H04L5/1446—Negotiation of transmission parameters prior to communication of transmission speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

A DSL communication system includes a DSL transmission unit at a central office (DTU-C) (310) and a DSL transmission unit at a remote location (DTU-R) (350) in communication over a communication link. DTU-C transmits a discovery message (315) to DTU-R (350) and awaits receiving a discovery response message (355) from DTU-R. After receiving the discovery response message (355), DTU-C transmits a probe message (320) to DTU-R followed by a probe signal. DTU-R measures the line quality while receiving the probe signal. After receiving the probe signal, DTU-R transmits a probe signal to DTU-C, by which signal DTU-C measures the line quality. After transmitting the probe signal, DTU-R (350) transmits a probe response message (365), including line quality measurements performed by DTU-R. DTU-C and DTU-R may negociate a first or startup data rate by transmitting data rate messages (330) based on the line quality measurements. DTU-C and DTU-R synchronize or train at the first data rate. After synchronization, DTU-C and/or DTU-R measure the line quality at the first data rate. A second data rate is then selected based on the line quality measurements. DTU-C may then initiate a rate change request, according to which DTU-C and DTU-R may re-synchronize at the second rate.
PCT/US2000/041700 1999-11-17 2000-10-30 Automatic data rate selection in dsl modems WO2001037534A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00990460A EP1230758A2 (en) 1999-11-17 2000-10-30 Automatic data rate selection in dsl modems

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
US16602899P 1999-11-17 1999-11-17
US60/166,028 1999-11-17
US19704700P 2000-04-14 2000-04-14
US60/197,047 2000-04-14
US09/629,565 US6546046B1 (en) 1999-11-17 2000-07-31 DSL pre-synchronization auto baud
US09/629,563 US6570915B1 (en) 1999-11-17 2000-07-31 DSL auto baud
US09/629,563 2000-07-31
US09/629,564 2000-07-31
US09/629,564 US6535551B1 (en) 1999-11-17 2000-07-31 DSL post-synchronization auto baud
US09/629,565 2000-07-31

Publications (2)

Publication Number Publication Date
WO2001037534A2 WO2001037534A2 (en) 2001-05-25
WO2001037534A3 true WO2001037534A3 (en) 2001-12-20

Family

ID=27538734

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/041700 WO2001037534A2 (en) 1999-11-17 2000-10-30 Automatic data rate selection in dsl modems

Country Status (2)

Country Link
EP (1) EP1230758A2 (en)
WO (1) WO2001037534A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100407717C (en) * 2002-07-26 2008-07-30 中兴通讯股份有限公司 Very high bit rate digital user line link rate switching method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5541955A (en) * 1992-11-06 1996-07-30 Pericle Communications Company Adaptive data rate modem
EP0806852A2 (en) * 1996-05-09 1997-11-12 Texas Instruments Incorporated A multimode digital modem
WO1998059476A1 (en) * 1997-06-20 1998-12-30 Amati Communications Corporation Protocol for transceiver initialisation in a discrete multitone (dmt) system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5541955A (en) * 1992-11-06 1996-07-30 Pericle Communications Company Adaptive data rate modem
EP0806852A2 (en) * 1996-05-09 1997-11-12 Texas Instruments Incorporated A multimode digital modem
WO1998059476A1 (en) * 1997-06-20 1998-12-30 Amati Communications Corporation Protocol for transceiver initialisation in a discrete multitone (dmt) system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEN WALTER Y: "DSL: SIMULATION TECHNIQUES AND STANDARDS DEVELOPMENT FOR DIGITAL SUBSCRIBER LINE SYSTEMS", 1998, MACMILLAN, INDIANAPOLIS, INDIANA, USA, XP002166042 *

Also Published As

Publication number Publication date
EP1230758A2 (en) 2002-08-14
WO2001037534A2 (en) 2001-05-25

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