GB2315638B - Synchronisation checking - Google Patents

Synchronisation checking

Info

Publication number
GB2315638B
GB2315638B GB9615153A GB9615153A GB2315638B GB 2315638 B GB2315638 B GB 2315638B GB 9615153 A GB9615153 A GB 9615153A GB 9615153 A GB9615153 A GB 9615153A GB 2315638 B GB2315638 B GB 2315638B
Authority
GB
United Kingdom
Prior art keywords
message
sid
lpid
ssp
scp
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.)
Expired - Fee Related
Application number
GB9615153A
Other versions
GB2315638A (en
GB9615153D0 (en
Inventor
Bart Jellema
Rene Peeren
Louise Croughan
Freek Aben
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 GB9615153A priority Critical patent/GB2315638B/en
Publication of GB9615153D0 publication Critical patent/GB9615153D0/en
Publication of GB2315638A publication Critical patent/GB2315638A/en
Application granted granted Critical
Publication of GB2315638B publication Critical patent/GB2315638B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/0029—Provisions for intelligent networking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Communication Control (AREA)

Abstract

In a duplex communications system with asynchronous exchange of messages between two stations, such as between a service switching point SSP and a service control point SCP in an Intelligent Network, each message sent from a station includes a sequentially assigned number indicated by a sending ID parameter SID and also includes a receiving parameter LPID indicating the number of the most recent message received from the other station. For example, the SCP sends a message with SID= 1*,LPID = 1 in response to message number 1 from the SSP. If the SSP sends a message SID=3,LPID=1* before receiving a message SID=2*,LPID=2 sent by the SCP in response to the previous message (SID=2,LPID=1*) sent by the SSP, the SSP can detect such message "crossing" (ie. the stations are effectively out of synchronisation) because the LPID =2 parameter indicates a response to message SID =2, rather than message SID =3, from the SSP. The SSP may then ignore message SID=2*,LPID=2 from the SCP and await the SCP's response SID=3*,LPID=3 to the SSP's most recent message (SID =3,LPID = 1*). Because of the sequential numbering, it can also be detected when a message has been lost during transmission (Fig.6).
GB9615153A 1996-07-19 1996-07-19 Synchronisation checking Expired - Fee Related GB2315638B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9615153A GB2315638B (en) 1996-07-19 1996-07-19 Synchronisation checking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9615153A GB2315638B (en) 1996-07-19 1996-07-19 Synchronisation checking

Publications (3)

Publication Number Publication Date
GB9615153D0 GB9615153D0 (en) 1996-09-04
GB2315638A GB2315638A (en) 1998-02-04
GB2315638B true GB2315638B (en) 2000-09-13

Family

ID=10797156

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9615153A Expired - Fee Related GB2315638B (en) 1996-07-19 1996-07-19 Synchronisation checking

Country Status (1)

Country Link
GB (1) GB2315638B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8843655B2 (en) 1999-05-04 2014-09-23 At&T Investments Uk Llc Data transfer, synchronising applications, and low latency networks

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI106170B (en) * 1997-10-24 2000-11-30 Nokia Networks Oy The switching point and control point of the intelligent network service and the arrangement and method between them
GB2349717A (en) * 1999-05-04 2000-11-08 At & T Lab Cambridge Ltd Low latency network
CA2330017A1 (en) * 2000-12-29 2002-06-29 Soft Tracks Enterprises Ltd. Pending persistent reversal

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0358293A2 (en) * 1988-09-08 1990-03-14 Digital Equipment Corporation Local area system transport
WO1990006647A1 (en) * 1988-12-05 1990-06-14 Compuquest, Inc. Method and system for data transmission, using forward error correction and frame interleaving
EP0418866A2 (en) * 1989-09-19 1991-03-27 Nippon Telegraph And Telephone Corporation Signal transmission system capable of performing re-transmission control in units of slots
EP0570220A2 (en) * 1992-05-15 1993-11-18 International Business Machines Corporation Acknowledgment protocol for serial data network with out-of-order delivery
WO1995006384A1 (en) * 1993-08-25 1995-03-02 Transaction Technology, Inc. Home services delivery system with intelligent terminal emulator
US5425025A (en) * 1990-10-30 1995-06-13 Fujitsu Limited Communication protocol system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0358293A2 (en) * 1988-09-08 1990-03-14 Digital Equipment Corporation Local area system transport
WO1990006647A1 (en) * 1988-12-05 1990-06-14 Compuquest, Inc. Method and system for data transmission, using forward error correction and frame interleaving
EP0418866A2 (en) * 1989-09-19 1991-03-27 Nippon Telegraph And Telephone Corporation Signal transmission system capable of performing re-transmission control in units of slots
US5425025A (en) * 1990-10-30 1995-06-13 Fujitsu Limited Communication protocol system
EP0570220A2 (en) * 1992-05-15 1993-11-18 International Business Machines Corporation Acknowledgment protocol for serial data network with out-of-order delivery
WO1995006384A1 (en) * 1993-08-25 1995-03-02 Transaction Technology, Inc. Home services delivery system with intelligent terminal emulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8843655B2 (en) 1999-05-04 2014-09-23 At&T Investments Uk Llc Data transfer, synchronising applications, and low latency networks

Also Published As

Publication number Publication date
GB2315638A (en) 1998-02-04
GB9615153D0 (en) 1996-09-04

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20100719