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WO1994000958A1 - Procede de regulation de trafic dans un reseau de communication - Google Patents

Procede de regulation de trafic dans un reseau de communication Download PDF

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Publication number
WO1994000958A1
WO1994000958A1 PCT/GB1993/001306 GB9301306W WO9400958A1 WO 1994000958 A1 WO1994000958 A1 WO 1994000958A1 GB 9301306 W GB9301306 W GB 9301306W WO 9400958 A1 WO9400958 A1 WO 9400958A1
Authority
WO
WIPO (PCT)
Prior art keywords
exchange
threshold
trunk
parent
routes
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/GB1993/001306
Other languages
English (en)
Inventor
Brian Charles Tester
Donald Fisk
Charles Arnold Swaine
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
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 British Telecommunications PLC filed Critical British Telecommunications PLC
Priority to AU43493/93A priority Critical patent/AU4349393A/en
Publication of WO1994000958A1 publication Critical patent/WO1994000958A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/64—Distributing or queueing
    • H04Q3/66—Traffic distributors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/36—Statistical metering, e.g. recording occasions when traffic exceeds capacity of trunks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/0062—Provisions for network management
    • H04Q3/0091—Congestion or overload control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13522—Indexing scheme relating to selecting arrangements in general and for multiplex systems traffic management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13561—Indexing scheme relating to selecting arrangements in general and for multiplex systems congestion - inc. overflow
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13563—Indexing scheme relating to selecting arrangements in general and for multiplex systems call gapping, e.g. to prevent congestion

Definitions

  • This invention relates to a method of controlling a communications network which includes at least one local exchange connected by routes to one or more parent trunk exchanges each being one of a plurality of trunk exchanges interconnected by trunk routes. It is particularly concerned with the control of a network following detection of a local exchange failure.
  • a local exchange is associated with a home exchange, through which incoming calls to the local exchange are routed, and a security exchange, through which outward calls from the local exchange are routed, in normal operation.
  • the security exchange is so called because it can also be used to route incoming calls to the local exchange if the home exchange fails.
  • the security and home exchanges are collectively referred to as the parent exchanges of the local exchange. Exchanges other than the parent exchanges are referred to as far end trunk exchanges of the local exchanges.
  • Near real-time network traffic management (NTM) is an essential component of network management if optimal traffic performance in terms of call throughput is to be ensured.
  • BT' s trunk network in the United Kingdom currently handles approximately six million call attempts per hour during the busy periods which is equivalent to 1, 700 call attempts per second.
  • any network difficulties are detected and controlled as quickly as possible.
  • difficulties are often encountered by network traffic managers due to abnormal traffic patterns which can be caused by events such as ' phone-ins, tele-votes and public holidays (for example Christmas Day and New Year's Eve/Day).
  • traffic in the network varies widely from the normal level, sometimes quite spectacularly, and the network must be controlled to maintain the best overall network performance.
  • digital switches such as System X it is possible to monitor closely the performance of each exchange and the routes between them and to the subscribers.
  • BT' s Network Traffic Management System currently receives statistics on upwards of 37, 000 routes from 490 exchanges in the UK every five minutes, which measurement period was chosen to be a long enough period to be able to obtain a statistically reliable measurement of the network performance whilst being short enough to allow effective real-time control of the network.
  • the information received by the NTMS is processed to provide CCITT recommended parameters. For instance, these include the Percentage Overflow (OFL) and All Circuits Engaged (ACE) parameters.
  • OFL Percentage Overflow
  • ACE All Circuits Engaged
  • indication of a network problem is when an ' exception' is displayed on a wall-board, or on a graphical interface at an individual manager' s workstation, at a Traffic Management Centre.
  • Exceptions are those parameter values, calculated from network element measurements, which deviate sufficiently from a predetermined threshold for that value. The exceptions are ranked in a priority order with the top 20 displayed.
  • some exceptions do not necessarily indicate a difficulty as thresholds are percentage-based and set a value which ensures all potential difficulties are captured. This results in exceptions being displayed that are occasionally spurious or insignificant. The exceptions therefore need to be examined in more detail to determine if a real difficulty exists and whether it warrants any action.
  • the NTMS provides near real-time surveillance and monitoring of the network' s status and performance. It provides the network traffic managers with information to enable them take prompt action to control the flow of traffic to ensure the maximum utilization of the network in all situations.
  • the NTMS allows network traffic managers to look at the raw statistics as well as derived generic parameters and to compare traffic patterns over the last few measurement periods to isolate any trends.
  • An On-Line Traffic Information System takes the measurement of statistics from the NTMS system and processes them to provide summarised historical data for daily and weekly traffic patterns. This system allows the network traffic managers to examine historical traffic patterns to detect any radical shifts in traffic.
  • a data management system provides the network traffic managers with an up-to-date copy of the routing tables at all trunk exchanges. This information is used to check the routes to which calls can be routed, which controls are in force and the routing algorithms being used.
  • route gapping is a control that may be used but it is present practice only to apply route gapping if the exchange is likely to be isolated for another five minutes and the calling levels are high.
  • Controls available might comprise not only route gapping but also other forms of call gapping, and code blocking.
  • Route gapping however affects all calls down a particular route. Call gapping and code blocking can be applied to be more destination specific.
  • MSS statistics In System X exchanges these are known as MSS statistics, from the Management Statistics Subsystem.
  • MSS statistics In System X exchanges these are known as MSS statistics, from the Management Statistics Subsystem.
  • a method of controlling a network which includes at least one local exchange connected by one or more routes to one or more parent trunk exchanges, each parent trunk exchange being one of a plurality of trunk exchanges interconnected by trunk routes, the method being characterised in that controls are applied: a) whenever the Percentage Overflow (OFL) for a traffic route from a parent exchange to the local exchange has stayed above a first threshold for the duration of a measurement period; and b) whenever the All Circuits Engaged (ACE) parameter for a traffic route from a far-end trunk exchange to a parent exchange of the local exchange has increased from above a second threshold to above a third threshold greater than the second threshold during a measurement period.
  • OFL Percentage Overflow
  • ACE All Circuits Engaged
  • the control which might be applied is route gapping to affect the appropriate traffic route or routes.
  • the control which might be applied is call gapping to the number range of the local exchange, and it s applied at the relevant far end trunk exchange or exchanges. It might be noted that, for the purpose of the present specification, "traffic route” or “route” is used to describe a route in a network primarily between exchanges and does not normally include the link between a subscriber' s customer premises equipment and the local exchange.
  • route gapping is removed from a parent exchange once the Circuits In Service (CCTS).
  • CCTS Circuits In Service
  • IS on the traffic route(s) from the parent exchange to the local exchange has been greater than a first proportion of the available circuits on that route (or those traffic routes ) for the duration of a measurement period and the call gapping is removed from a far-end trunk exchange once the ACE from the far-end trunk exchange to the parent exchange of the local exchange has stayed below a fourth threshold for the duration of a measurement period.
  • the first threshold may be set to a value larger than the highest normal value of OFL for the network, for example 30%.
  • the second threshold may be set to a value approximately equal to the normal expected daily maximum of
  • ACE for the network generally greater than 10%.
  • the third threshold is greater than 20% and the first proportion is 95%.
  • the fourth threshold is preferably set approximately equal to the normal expected daily maximum of ACE for the network,— for example 10%.
  • apparatus for use with a telecommunications network including at least one local exchange which is connected by routes to one or more parent trunk exchanges, each parent trunk exchange being one of a plurality of trunk exchanges, interconnected by trunk routes, and control means for applying controls to the trunk exchanges of the network
  • apparatus is characterised in that there is included a system responsive to the Percentage Overflow (OFL) for a traffic route from a parent exchange to the local exchange and the All Circuits Engaged (ACE) parameter for one or more traffic routes from a far-end trunk exchange to a parent exchange of the local exchange, which system: a) whenever the Percentage Overflow (OFL) for one or more traffic routes from a parent exchange to the local exchange has stayed above a first threshold for the duration of a measurement period, indicates the need for a control such_ as route gapping to affect those traffic routes; and b) whenever the All Circuits Engaged (ACE) parameter for one or more traffic routes from a far-end trunk exchange
  • the apparatus provides to the network controller a recommendation to apply appropriate controls when it is determined by the system that controls should be applied to any exchange of the network.
  • a communications network including at least one local exchange which is connected by routes to one or more parent trunk exchanges, each parent trunk exchange being one of a plurality of trunk exchanges interconnected by trunk routes, and control means for applying controls to the trunk exchanges of the network, is characterised in that there is included a system responsive to the Percentage Overflow (OFL) for one or more traffic routes from a parent exchange to the local exchange and the All Circuits Engaged (ACE) parameter for one or more traffic routes from a far- end trunk exchange to a parent exchange of the local exchange, which system: a) whenever the Percentage Overflow (OFL) for a traffic route from a parent exchange to the local exchange has stayed above a first threshold for the duration of a measurement period, causes the control means to apply a control such as route gapping to affect that traffic route; and b) whenever the All Circuits Engaged (ACE) parameter for one or more traffic routes from a far-end trunk exchange to a parent exchange of the local exchange has increased from
  • OFL Percentage Overflow
  • Figure 1 is a schematic representation of a network controllable by a method of the present invention
  • FIG. 2 is a schematic representation of a control system for implementing the method of the present invention.
  • FIG 3 is a schematic representation of a control system for implementing the method of the present invention using direct control of a network by a computer.
  • a telecommunications network comprises a number of digital main switch units (DMSUs) - trunk exchanges - of which only five are shown for clarity and are referenced 100, 102, 104, 106, 108 and 110.
  • Subscribers' customer premises equipment of which only two are shown referenced 112 and 114, are connected to the trunk exchanges 102 to 110 via respective digital local exchanges (DLE) 116 and 118.
  • DLE digital local exchanges
  • the DLE 116 is connected to the DMSUs 100 and 102 via traffic routes Rl and R2, respectively, through which incoming calls to the subscribers attached to the DLE 116, including subscriber 112, are routed.
  • the DMSUs 100 and 102 are commonly referred to as the home trunk exchanges for the DLE 116.
  • the DLE 116 is also connected to the DMSU 104 through which outgoing calls from the DLE are routed. This is usually called a security exchange as incoming calls to the exchange 116 can be routed through it should one of the DMSUs 100 and 102 fail.
  • the DMSU 108 is the home exchange for the digital local exchange 118.
  • the home and security exchanges associated with a DLE are collectively referred to as the parent exchanges of that DLE.
  • the network of Figure 1 is denoted by box 202. Every five minutes, which is the measurement period of the network of Figure 1, a set of statistics is generated by the digital exchanges of the network 202 which is processed by an NTMS system 204 to provide generic measurement values including those of the CCITT recommendation. These parameters are input to a run ⁇ time system 206 which applies rules to the received parameters from the NTMS 204 by means of an appropriately coded expert system. The run-time system 206 provides recommendations to aid a network traffic manager 208 control local exchange failures in the network 202 according to the method of the present invention.
  • the run-time system 206 employs a three phase cycle in which recommendations for local exchange failure * control actions are passed to the network traffic manager 208.
  • the run-time system 206 monitors the exchanges of the network 202 in the manner which will now be described with specific reference to the failure of local exchange 116.
  • route gapping is applied on those traffic routes and whenever the All Circuits Engaged (ACE) parameter for the traffic routes from a far-end trunk exchange 106-118 to a parent exchange 100 and 102 of the local exchange 116 has increased from above 10% to above 20% during a 5 minute measurement period, call gapping for the number range of the local exchange 116 is applied to those far end trunk exchanges.
  • ACE All Circuits Engaged
  • run-time system 206 may directly control the network to apply the method of the present invention as shown in Figure 3 but at present it is expected that it will be necessary for a network traffic manager 208 to implement of the method of the present invention to allow overriding of the recommendations at his or her discretion.
  • the method of the present invention has been simulated on a computer representation of BT' s UK telecommunications network in which the run-time system 206 comprises a PROLOG-based expert system coded with the rules necessary to provide the recommendations described above in response to the appropriate CCITT parameters from the NTMS 204.
  • the particular system employed was a QUINTUS PROLOG expert system run on a Sun _ Sparc station. Parameters generated during real network activity were recorded for the entire GB network for fou, 5-minute measurement periods and stored as a data file on the computer.
  • a C-language program provided an interface between the raw parameters in the computer file and the expert system in that as the expert system required information about the network, the C-language program calculated the data from the raw parameters.
  • the particular thresholds adopted in order to determine when a local exchange failure has occurred can be set according to the particular network 202 to which the method is to be applied.
  • the present invention is not restricted to any particular value of threshold adopted in the above described specific embodiment.
  • embodiments of the present invention find particular application in the complex telecommunications networks of the PSTNs (Public Switched Telecommunications Networks), they should not be considered to be limited necessarily to networks carrying voice transmissions.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

Procédé de régulation de trafic dans un réseau, qui comprend au moins un central local connecté par une ou plusieurs voies à un ou plusieurs centraux de rattachement interurbain, chacun desquels fait partie d'une multiplicité de centraux itnerurbains interconnectés par des voies interurbaines. Le procédé consiste à appliquer des réglages: (a) à chaque fois que le pourcentage de débordement (OFL) pour une ou plusieurs voies de trafic provenant d'un central de rattachement vers le central local est demeuré au-dessus d'un premier seuil pour la durée d'une période de mesure; et (b) à chaque fois que le paramètre Tous Circuits Occupés (ACE) pour une ou plusieurs voies de trafic provenant d'un central interurbain d'extrémité distante vers un central de rattachement du central local s'est élevé d'un second seuil à un troisième seuil supérieur à ce dernier au cours d'une période de mesure. Lorsque la condition (a) est satisfaite et que ledit OFL est demeuré au-dessus du premier seuil comme requis, un réglage d'écartement des voies est appliqué, permettant d'affecter la ou les voies de trafic appropriées. Le réglage qui est appliqué lorsque la condition (b) est remplie et que le paramètre ACE pour une voie de trafic est demeurée au-dessus du troisième seuil comme requis, est l'écartement d'appels pour la plage de numéros du central local, le réglage étant appliqué au central ou aux centraux interurbains d'extrémité distante approprié.
PCT/GB1993/001306 1992-06-19 1993-06-21 Procede de regulation de trafic dans un reseau de communication Ceased WO1994000958A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU43493/93A AU4349393A (en) 1992-06-19 1993-06-21 Method of controlling the traffic in a communications network

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9213033.5 1992-06-19
GB929213033A GB9213033D0 (en) 1992-06-19 1992-06-19 Method of controlling a telecommunications network

Publications (1)

Publication Number Publication Date
WO1994000958A1 true WO1994000958A1 (fr) 1994-01-06

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Country Status (3)

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AU (1) AU4349393A (fr)
GB (1) GB9213033D0 (fr)
WO (1) WO1994000958A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994023543A1 (fr) * 1993-03-31 1994-10-13 British Telecommunications Public Limited Company Procede de commande d'un reseau de telecommunications
FR2726142A1 (fr) * 1994-10-19 1996-04-26 Bellsouth Corp Procede de commande, de regulation et de gestion du trafic reseau sur un reseau telephonique commute intelligent
US5719930A (en) * 1996-07-08 1998-02-17 Bell Canada Method of volume screening signalling messages in a telecommunication system
WO1999029971A1 (fr) 1997-12-04 1999-06-17 Francisco Alonso Fullola Doseur automatique pour produits hygieniques-desinfectants destines a une utilisation quotidienne pour les personnes
WO2018204534A1 (fr) 2017-05-02 2018-11-08 Immunomic Therapeutics, Inc. Constructions de lamp (protéine membranaire associée au lysosome) comprenant des antigènes cancéreux

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0334612A1 (fr) * 1988-03-21 1989-09-27 BRITISH TELECOMMUNICATIONS public limited company Commande de trafic d'appel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0334612A1 (fr) * 1988-03-21 1989-09-27 BRITISH TELECOMMUNICATIONS public limited company Commande de trafic d'appel

Non-Patent Citations (10)

* Cited by examiner, † Cited by third party
Title
ASCH G. R., CHEN J. S.: "REAL-TIME NETWORK ROUTING IN A DYNAMIC CLASS-OF-SERVICE NETWORK.", TELETRAFFIC AND DATATRAFFIC IN A PERIOD OF CHANGE. COPENHAGEN, JUNE 19 - 26, 1991., AMSTERDAM, NORTH HOLLAND., NL, vol. CONGRESS 13, 19 June 1991 (1991-06-19), NL, pages 187 - 194., XP000303028 *
CHAUDHARY V. P., KRISHNAN K. R., VISHNUBHATLA S.: "TECHNOLOGY-TRIAL OF DYNAMIC TRAFFIC ROUTING WITH 5 MINUTE UPDATES.", COUNTDOWN TO THE NEW MILENNIUM. PHOENIX, DEC. 2 - 5, 1991., NEW YORK, IEEE., US, vol. 03 OF 03., 2 December 1991 (1991-12-02), US, pages 1696 - 1700., XP000313690, ISBN: 978-0-87942-697-2, DOI: 10.1109/GLOCOM.1991.188653 *
CHEMOUIL P., FILIPIAK J.: "INTEGRATED NETWORK MANAGEMENT AND CONTROL.", COMPUTER NETWORKS AND ISDN SYSTEMS., NORTH HOLLAND PUBLISHING. AMSTERDAM., NL, vol. 20., no. 01 / 05., 1 December 1990 (1990-12-01), NL, pages 143 - 153., XP000161279, ISSN: 0169-7552, DOI: 10.1016/0169-7552(90)90020-S *
IEEE MILITARY COMMUNICATIONS CONFERENCE vol. 1, 19 October 1987, WASHINGTON (US) pages 7 - 12 L.F. GIFFORD 'Adaptive routing and traffic control in damaged circuit switched networks' *
KENICHI MASE, HISAO YAMAMOTO: "ADVANCED TRAFFIC CONTROL METHODS FOR NETWORK MANAGEMENT.", IEEE COMMUNICATIONS MAGAZINE., IEEE SERVICE CENTER, PISCATAWAY., US, vol. 28., no. 10., 1 October 1990 (1990-10-01), US, pages 82 - 88., XP000165759, ISSN: 0163-6804, DOI: 10.1109/35.60371 *
LANGLOIS F., REGNIER J.: "DYNAMIC CONGESTION CONTROL IN CIRCUIT-SWITCHED TELECOMMUNICATIONS NETWORKS.", TELETRAFFIC AND DATATRAFFIC IN A PERIOD OF CHANGE. COPENHAGEN, JUNE 19 - 26, 1991., AMSTERDAM, NORTH HOLLAND., NL, vol. CONGRESS 13, 19 June 1991 (1991-06-19) - 26 June 1991 (1991-06-26), NL, pages 127 - 132., XP000303019 *
PASSERON A.: "NETWORK SUPERVISION AND MANAGEMENT.", COMMUTATION ET TRANSMISSION., SOTELEC. PARIS., FR, vol. 13., no. SPECIAL., 1 January 1991 (1991-01-01), FR, pages 45 - 52., XP000241934, ISSN: 0242-1283 *
STACH J. F.: "GRAPH ANALYSIS AND RULE BASED PARADIGMS FOR THE IDENTIFICATION CONTAINMENT AND CLEARING OF SWITCH CONGESTION IN NON-HIERARCHICAL CIRCUIT SWITCHED NETWORKS.", PROCEEDINGS OF THE NATIONAL COMMUNICATIONS FORUM., NATIONAL ENGINEERING CONSORTIUM INC. OAK BROOK, ILLINOIS., US, vol. 43., no. 01., 2 October 1989 (1989-10-02), US, pages 474 - 481., XP000253912 *
TURNER P. M. D., KEY P. B.: "A NEW CALL GAPPING ALGORITHM FOR NETWORK TRAFFIC MANAGEMENT.", TELETRAFFIC AND DATATRAFFIC IN A PERIOD OF CHANGE. COPENHAGEN, JUNE 19 - 26, 1991., AMSTERDAM, NORTH HOLLAND., NL, vol. CONGRESS 13, 19 June 1991 (1991-06-19), NL, pages 121 - 126., XP000303018 *
XUAN HUY PHAM.: "CONTROL LOOP FOR TRAFFIC MANAGEMENT OF NETWORK UNDER FOCUSSED OVERLOADS.", TELETRAFFIC AND DATATRAFFIC IN A PERIOD OF CHANGE. COPENHAGEN, JUNE 19 - 26, 1991., AMSTERDAM, NORTH HOLLAND., NL, vol. CONGRESS 13, 19 June 1991 (1991-06-19) - 26 June 1991 (1991-06-26), NL, pages 315 - 322., XP000303047 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994023543A1 (fr) * 1993-03-31 1994-10-13 British Telecommunications Public Limited Company Procede de commande d'un reseau de telecommunications
FR2726142A1 (fr) * 1994-10-19 1996-04-26 Bellsouth Corp Procede de commande, de regulation et de gestion du trafic reseau sur un reseau telephonique commute intelligent
US5719930A (en) * 1996-07-08 1998-02-17 Bell Canada Method of volume screening signalling messages in a telecommunication system
WO1999029971A1 (fr) 1997-12-04 1999-06-17 Francisco Alonso Fullola Doseur automatique pour produits hygieniques-desinfectants destines a une utilisation quotidienne pour les personnes
WO2018204534A1 (fr) 2017-05-02 2018-11-08 Immunomic Therapeutics, Inc. Constructions de lamp (protéine membranaire associée au lysosome) comprenant des antigènes cancéreux

Also Published As

Publication number Publication date
AU4349393A (en) 1994-01-24
GB9213033D0 (en) 1992-08-05

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