CA2279318A1 - Air frame synchronisation - Google Patents

Air frame synchronisation Download PDF

Info

Publication number
CA2279318A1
CA2279318A1 CA002279318A CA2279318A CA2279318A1 CA 2279318 A1 CA2279318 A1 CA 2279318A1 CA 002279318 A CA002279318 A CA 002279318A CA 2279318 A CA2279318 A CA 2279318A CA 2279318 A1 CA2279318 A1 CA 2279318A1
Authority
CA
Canada
Prior art keywords
air frame
frame synchronisation
remote radio
radio transceivers
signal
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002279318A
Other languages
French (fr)
Other versions
CA2279318C (en
Inventor
Henrik Nyberg
Randall Glenn Bright
John Mark Freeze
Thomas Ostman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unwired Planet LLC
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Publication of CA2279318A1 publication Critical patent/CA2279318A1/en
Application granted granted Critical
Publication of CA2279318C publication Critical patent/CA2279318C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0682—Clock or time synchronisation in a network by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2662—Arrangements for Wireless System Synchronisation
    • H04B7/2671—Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
    • H04B7/2678—Time synchronisation
    • H04B7/2687—Inter base stations synchronisation
    • H04B7/2693—Centralised synchronisation, i.e. using external universal time reference, e.g. by using a global positioning system [GPS] or by distributing time reference over the wireline network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H04J3/0647—Synchronisation among TDM nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1605—Fixed allocated frame structures
    • H04J3/1623—Plesiochronous digital hierarchy [PDH]

Abstract

An air frame synchronisation signal is transmitted as a data signal over a PCM link from a central unit to a plurality of remote radio transceivers, allowing the remote radio transceivers to recreate the AFS signal with the desired accuracy, compensating for transmission delays.
CA002279318A 1997-01-31 1998-01-26 Air frame synchronisation Expired - Fee Related CA2279318C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9702026.7 1997-01-31
GB9702026A GB2321827B (en) 1997-01-31 1997-01-31 Telecommunications system
PCT/EP1998/000421 WO1998034359A1 (en) 1997-01-31 1998-01-26 Air frame synchronisation

Publications (2)

Publication Number Publication Date
CA2279318A1 true CA2279318A1 (en) 1998-08-06
CA2279318C CA2279318C (en) 2005-05-03

Family

ID=10806899

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002279318A Expired - Fee Related CA2279318C (en) 1997-01-31 1998-01-26 Air frame synchronisation

Country Status (9)

Country Link
US (1) US6198736B1 (en)
JP (1) JP4404967B2 (en)
CN (1) CN1139202C (en)
AU (1) AU746594B2 (en)
BR (1) BR9806812A (en)
CA (1) CA2279318C (en)
DE (1) DE19881986T1 (en)
GB (1) GB2321827B (en)
WO (1) WO1998034359A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
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GB2362783B (en) * 2000-05-26 2002-08-07 Motorola Inc Mobile radio communication system and method of operating a mobile radio communication system
US6950414B1 (en) 2000-10-17 2005-09-27 Ericsson Inc. Cable carrying communications data and timing data to radio heads
US7180915B2 (en) * 2001-12-21 2007-02-20 Nokia Corporation Apparatus, and an associated method, for facilitating synchronization in a wireless mesh network
US7508810B2 (en) 2005-01-31 2009-03-24 Airbiquity Inc. Voice channel control of wireless packet data communications
CN101465709B (en) * 2007-12-19 2011-06-15 华东电网有限公司 Method for sending and receiving pulse frame
US8036600B2 (en) 2009-04-27 2011-10-11 Airbiquity, Inc. Using a bluetooth capable mobile phone to access a remote network
US8418039B2 (en) 2009-08-03 2013-04-09 Airbiquity Inc. Efficient error correction scheme for data transmission in a wireless in-band signaling system
US8249865B2 (en) 2009-11-23 2012-08-21 Airbiquity Inc. Adaptive data transmission for a digital in-band modem operating over a voice channel
US8848825B2 (en) 2011-09-22 2014-09-30 Airbiquity Inc. Echo cancellation in wireless inband signaling modem
CA3047934A1 (en) * 2016-12-21 2018-06-28 Centre For Development Of Telematics (C-Dot) A method and a mirrored serial interface (msi) for transferring data

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Publication number Priority date Publication date Assignee Title
JPS5324761B1 (en) * 1968-10-11 1978-07-22
US4592050A (en) 1984-03-29 1986-05-27 International Business Machines Corporation Apparatus and method for providing a transparent interface across a satellite communications link
JPS612435A (en) 1984-06-14 1986-01-08 Nec Corp Forecasting device of receiving position
EP0236968A3 (en) * 1986-03-10 1989-04-19 Siemens Aktiengesellschaft Method of digital signal transmission in a mobile radio system
CA2033309C (en) * 1989-12-27 1998-02-10 Seiji Kondo Frame synchronization system among multiple radio base stations for tdma digital mobile communications system
JP2924060B2 (en) * 1990-03-30 1999-07-26 日本電気株式会社 Digital mobile communication system
US5416778A (en) 1992-06-26 1995-05-16 U.S. Philips Corporation Digital radio communication system and primary and secondary station for use in such a system
GB9302975D0 (en) * 1993-02-15 1993-03-31 Shaye Communications Ltd Improvements relating to duplex communications systems
JP3347387B2 (en) 1993-03-16 2002-11-20 株式会社東芝 LAN control processor
JP3071338B2 (en) * 1993-04-30 2000-07-31 沖電気工業株式会社 Super frame transmission timing specification device
IT1265155B1 (en) * 1993-07-14 1996-10-31 Italtel Spa PROCEDURE AND DEVICE FOR EQUALIZING THE INSTANT OF TRANSMISSION OF A PLURALITY OF RADIO BASE STATIONS
US5473668A (en) * 1993-07-21 1995-12-05 Nec Corporation Digital cordless telephone system readily capable of setting up
JPH0746660A (en) * 1993-07-28 1995-02-14 Nippon Telegr & Teleph Corp <Ntt> Radio communication equipment
DE69433458T2 (en) 1993-10-13 2004-11-25 Ntt Docomo Inc. METHOD AND DEVICE FOR SWITCHING RADIO CONNECTIONS IN MOBILE COMMUNICATION
JP3403784B2 (en) 1993-12-10 2003-05-06 富士通テン株式会社 Synchronous protection method for digital communication
US5440562A (en) 1993-12-27 1995-08-08 Motorola, Inc. Communication through a channel having a variable propagation delay
JPH07297776A (en) * 1994-04-22 1995-11-10 Oki Electric Ind Co Ltd Communication system
JPH07298347A (en) * 1994-04-25 1995-11-10 Oki Electric Ind Co Ltd Base station subordinate synchronizing method and centralized control station
US5586119A (en) * 1994-08-31 1996-12-17 Motorola, Inc. Method and apparatus for packet alignment in a communication system
US5530704A (en) * 1995-02-16 1996-06-25 Motorola, Inc. Method and apparatus for synchronizing radio ports in a commnuication system
JP3440389B2 (en) * 1995-02-20 2003-08-25 松下電器産業株式会社 Digital system cordless telephone equipment
US6226515B1 (en) * 1995-05-31 2001-05-01 Siemens Aktiengesellschaft Cellular cordless telecommunications system
US5828670A (en) * 1995-06-06 1998-10-27 Symmetricom, Inc. Distribution of synchronization in a synchronous optical environment
DE19523489A1 (en) * 1995-06-28 1997-01-02 Sel Alcatel Ag Method and circuit arrangement for the synchronization of pulse frames in multicellular telecommunications systems
US5666366A (en) * 1996-05-24 1997-09-09 National Semiconductor Corporation Inter-base synchronization technique for a TDMA communication system
US5953637A (en) * 1996-12-20 1999-09-14 Airnet Communications Corporation Time slot recovery for remote in-band translator in time division multiple access wireless system

Also Published As

Publication number Publication date
WO1998034359A1 (en) 1998-08-06
GB9702026D0 (en) 1997-03-19
BR9806812A (en) 2000-05-09
CN1139202C (en) 2004-02-18
JP4404967B2 (en) 2010-01-27
GB2321827A (en) 1998-08-05
AU6097798A (en) 1998-08-25
JP2001509980A (en) 2001-07-24
US6198736B1 (en) 2001-03-06
DE19881986T1 (en) 1999-12-16
AU746594B2 (en) 2002-05-02
CN1246994A (en) 2000-03-08
CA2279318C (en) 2005-05-03
GB2321827B (en) 2001-06-13

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EEER Examination request
MKLA Lapsed

Effective date: 20160126

MKLA Lapsed

Effective date: 20160126