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WO2000038361A3 - Clock synchronization in telecommunications network using system frame number - Google Patents

Clock synchronization in telecommunications network using system frame number Download PDF

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Publication number
WO2000038361A3
WO2000038361A3 PCT/SE1999/002416 SE9902416W WO0038361A3 WO 2000038361 A3 WO2000038361 A3 WO 2000038361A3 SE 9902416 W SE9902416 W SE 9902416W WO 0038361 A3 WO0038361 A3 WO 0038361A3
Authority
WO
WIPO (PCT)
Prior art keywords
system frame
frame number
processors
clock
set message
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.)
Ceased
Application number
PCT/SE1999/002416
Other languages
French (fr)
Other versions
WO2000038361A2 (en
Inventor
Marcus Karlsson
Erik Joensson
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to EP99964908A priority Critical patent/EP1142176A2/en
Priority to AU30937/00A priority patent/AU3093700A/en
Priority to JP2000590333A priority patent/JP2002533990A/en
Priority to CA002353598A priority patent/CA2353598A1/en
Publication of WO2000038361A2 publication Critical patent/WO2000038361A2/en
Publication of WO2000038361A3 publication Critical patent/WO2000038361A3/en
Anticipated expiration legal-status Critical
Ceased 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
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H04J3/0658—Clock or time synchronisation among packet nodes
    • H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
    • H04J3/0664—Clock or time synchronisation among packet nodes using timestamps unidirectional timestamps
    • 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
    • H04B7/269—Master/slave synchronisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Multi Processors (AREA)

Abstract

A telecommunications system (18) capitalizes employment of a system frame number (SFN) for synchronizing plural real time clocks (206) provided at one or more nodes of the network. System frame signals (e.g., pulses) are distributed from a source (210, 310) to processors (202) having slave clocks (206S) that need to be synchronized with a master clock. A master processor (202M, 302T) sends a clock set message (500) to the processors, the clock set message including a reference master clock time (506) and a reference system frame number (504). The recipient processors which receive the clock set message resynchronize their respective slave clocks using the reference master clock time and the reference system frame number. In one mode, the clock set message directs the recipient processors to set their respective slave clocks to the reference master clock time upon the recipient processors obtaining the reference system frame number. In another mode, the clock set message advises the recipient processors of an actual master clock time at the reference system frame number, thereby enabling the recipient processor to calculate an adjusted slave clock time.
PCT/SE1999/002416 1998-12-18 1999-12-17 Clock synchronization in telecommunications network using system frame number Ceased WO2000038361A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP99964908A EP1142176A2 (en) 1998-12-18 1999-12-17 Clock synchronization in telecommunications network using system frame number
AU30937/00A AU3093700A (en) 1998-12-18 1999-12-17 Clock synchronization in telecommunications network using system frame number
JP2000590333A JP2002533990A (en) 1998-12-18 1999-12-17 Clock synchronization of telecommunications networks using system frame numbers
CA002353598A CA2353598A1 (en) 1998-12-18 1999-12-17 Clock synchronization in telecommunications network using system frame number

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IBPCT/IB98/02073 1998-12-18
IB9802073 1998-12-18
US44320899A 1999-11-18 1999-11-18
US09/443,208 1999-11-18

Publications (2)

Publication Number Publication Date
WO2000038361A2 WO2000038361A2 (en) 2000-06-29
WO2000038361A3 true WO2000038361A3 (en) 2000-11-02

Family

ID=26318729

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1999/002416 Ceased WO2000038361A2 (en) 1998-12-18 1999-12-17 Clock synchronization in telecommunications network using system frame number

Country Status (7)

Country Link
EP (1) EP1142176A2 (en)
JP (1) JP2002533990A (en)
CN (1) CN1335000A (en)
AR (1) AR021937A1 (en)
AU (1) AU3093700A (en)
CA (1) CA2353598A1 (en)
WO (1) WO2000038361A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8837555B2 (en) 2008-03-18 2014-09-16 On-Ramp Wireless, Inc. Light monitoring system with antenna diversity
US8958460B2 (en) 2008-03-18 2015-02-17 On-Ramp Wireless, Inc. Forward error correction media access control system
US8995404B2 (en) 2009-03-20 2015-03-31 On-Ramp Wireless, Inc. Downlink communication with multiple acknowledgements

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2364203B (en) * 2000-06-27 2004-03-17 Nokia Mobile Phones Ltd Synchronisation
US7180915B2 (en) * 2001-12-21 2007-02-20 Nokia Corporation Apparatus, and an associated method, for facilitating synchronization in a wireless mesh network
EP1394641A1 (en) * 2002-09-02 2004-03-03 Siemens Aktiengesellschaft Method for transmitting an absolute time reference to a mobile station
DE102006019475B4 (en) 2006-04-26 2008-08-28 Nokia Siemens Networks Gmbh & Co.Kg Method for synchronizing modules of a base station
US7734264B2 (en) * 2006-08-29 2010-06-08 Qualcomm Incorporated System frame number (SFN) evaluator
CN101364863B (en) * 2008-09-27 2011-11-02 华为技术有限公司 Time synchronizing method, apparatus and system for master, slave time clock side in synchronous network
CN102545997B (en) * 2010-12-31 2014-12-10 中国移动通信集团公司 Method for determining system frame number, communication system and device
US10979279B2 (en) 2014-07-03 2021-04-13 International Business Machines Corporation Clock synchronization in cloud computing
KR102038347B1 (en) 2015-05-19 2019-10-30 후아웨이 테크놀러지 컴퍼니 리미티드 Paging method, user equipment, base station and core network device
CN107396326A (en) * 2017-08-02 2017-11-24 北京北方烽火科技有限公司 A kind of method and master clock system for generating System Frame Number

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3798650A (en) * 1972-10-02 1974-03-19 Bendix Corp Means for synchronizing clocks in a time ordered communications system
US4337463A (en) * 1980-08-22 1982-06-29 Control Data Corporation Time synchronization master station and remote station system
US4530091A (en) * 1983-07-08 1985-07-16 At&T Bell Laboratories Synchronization of real-time clocks in a packet switching system
US6009530A (en) * 1994-11-29 1999-12-28 Gpt Limited Real time clock synchronization in a telecommunications network

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3798650A (en) * 1972-10-02 1974-03-19 Bendix Corp Means for synchronizing clocks in a time ordered communications system
US4337463A (en) * 1980-08-22 1982-06-29 Control Data Corporation Time synchronization master station and remote station system
US4530091A (en) * 1983-07-08 1985-07-16 At&T Bell Laboratories Synchronization of real-time clocks in a packet switching system
US6009530A (en) * 1994-11-29 1999-12-28 Gpt Limited Real time clock synchronization in a telecommunications network

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8837555B2 (en) 2008-03-18 2014-09-16 On-Ramp Wireless, Inc. Light monitoring system with antenna diversity
US8958460B2 (en) 2008-03-18 2015-02-17 On-Ramp Wireless, Inc. Forward error correction media access control system
US8995404B2 (en) 2009-03-20 2015-03-31 On-Ramp Wireless, Inc. Downlink communication with multiple acknowledgements
US9294930B2 (en) 2009-03-20 2016-03-22 On-Ramp Wireless, Inc. Combined unique gold code transmissions

Also Published As

Publication number Publication date
CA2353598A1 (en) 2000-06-29
AU3093700A (en) 2000-07-12
AR021937A1 (en) 2002-09-04
WO2000038361A2 (en) 2000-06-29
CN1335000A (en) 2002-02-06
EP1142176A2 (en) 2001-10-10
JP2002533990A (en) 2002-10-08

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