GB2293296A - A method and a device for aligning frames of signals to be used in a synchronous digtal telecommunications system - Google Patents

A method and a device for aligning frames of signals to be used in a synchronous digtal telecommunications system

Info

Publication number
GB2293296A
GB2293296A GB9521665A GB9521665A GB2293296A GB 2293296 A GB2293296 A GB 2293296A GB 9521665 A GB9521665 A GB 9521665A GB 9521665 A GB9521665 A GB 9521665A GB 2293296 A GB2293296 A GB 2293296A
Authority
GB
United Kingdom
Prior art keywords
signal
signals
telecommunications system
aligned
synchronous
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
GB9521665A
Other versions
GB2293296B (en
GB9521665D0 (en
Inventor
Matti Kaasinen
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.)
Nokia Oyj
Original Assignee
Nokia Telecommunications Oy
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 Nokia Telecommunications Oy filed Critical Nokia Telecommunications Oy
Publication of GB9521665D0 publication Critical patent/GB9521665D0/en
Publication of GB2293296A publication Critical patent/GB2293296A/en
Application granted granted Critical
Publication of GB2293296B publication Critical patent/GB2293296B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04J3/062—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers
    • H04J3/0623—Synchronous multiplexing systems, e.g. synchronous digital hierarchy/synchronous optical network (SDH/SONET), synchronisation with a pointer process

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

The invention relates to a method and a device for aligning frames of signals to be used in a synchronous digital telecommunications system with each other. In the method, bytes of the frames are stored in an elastic buffer (61). In order to provide an automatic and as simple as possible way of implementing the alignment, (a) a delay measurement is started at the same phase of the frame of each signal, (b) after a certain predetermined delay period, a reference signal (A1) is produced from the delay measurement concerning one signal to be aligned, and (c) from a value (CV) indicated by the delay measurement concerning each signal to be aligned at the moment of occurrence of said reference signal, a read address is generated for the respective signal to be aligned in said elastic buffer (61). <IMAGE>
GB9521665A 1993-05-31 1994-05-30 A method and a device for aligning frames of signals to be used in a synchronous digtal telecommunications system Expired - Lifetime GB2293296B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI932481A FI94811C (en) 1993-05-31 1993-05-31 Method and apparatus for fitting the frames of signals used in a synchronous digital data communication system
PCT/FI1994/000216 WO1994028653A1 (en) 1993-05-31 1994-05-30 A method and a device for aligning frames of signals to be used in a synchronous digital telecommunications system

Publications (3)

Publication Number Publication Date
GB9521665D0 GB9521665D0 (en) 1996-01-03
GB2293296A true GB2293296A (en) 1996-03-20
GB2293296B GB2293296B (en) 1998-02-11

Family

ID=8538038

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9521665A Expired - Lifetime GB2293296B (en) 1993-05-31 1994-05-30 A method and a device for aligning frames of signals to be used in a synchronous digtal telecommunications system

Country Status (5)

Country Link
AU (1) AU6798094A (en)
DE (1) DE4493492T1 (en)
FI (1) FI94811C (en)
GB (1) GB2293296B (en)
WO (1) WO1994028653A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19903366A1 (en) * 1999-01-28 2000-08-17 Siemens Ag Process for converting Nx-STM-1 signals into STM-N signals

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4993026A (en) * 1988-09-27 1991-02-12 Nec Corporation Multiplexer apparatus with auxiliary synchronization for compensating for cable delays
US5033044A (en) * 1990-05-15 1991-07-16 Alcatel Na Network Systems Corp. System for aligning transmission facility framing bits to the sonet H4 multiframe indicator byte
US5046064A (en) * 1989-01-27 1991-09-03 Nec Corporation Packet switching system
US5168494A (en) * 1989-11-29 1992-12-01 Siemens Aktiengesellschaft Method for transmitting a digital broadband signal in a tributary unit concatenation via a network of a synchronous digital multiplex hierarchy
EP0543327A1 (en) * 1991-11-20 1993-05-26 Nec Corporation A synchronous optical multiplexing system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4993026A (en) * 1988-09-27 1991-02-12 Nec Corporation Multiplexer apparatus with auxiliary synchronization for compensating for cable delays
US5046064A (en) * 1989-01-27 1991-09-03 Nec Corporation Packet switching system
US5168494A (en) * 1989-11-29 1992-12-01 Siemens Aktiengesellschaft Method for transmitting a digital broadband signal in a tributary unit concatenation via a network of a synchronous digital multiplex hierarchy
US5033044A (en) * 1990-05-15 1991-07-16 Alcatel Na Network Systems Corp. System for aligning transmission facility framing bits to the sonet H4 multiframe indicator byte
EP0543327A1 (en) * 1991-11-20 1993-05-26 Nec Corporation A synchronous optical multiplexing system

Also Published As

Publication number Publication date
WO1994028653A1 (en) 1994-12-08
GB2293296B (en) 1998-02-11
AU6798094A (en) 1994-12-20
FI932481A0 (en) 1993-05-31
FI94811C (en) 1995-10-25
FI932481A (en) 1994-12-01
FI94811B (en) 1995-07-14
GB9521665D0 (en) 1996-01-03
DE4493492T1 (en) 1996-06-27

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20140529