WO1997042776A2 - Systeme et procede de traitement assurant la portabilite d'un numero dans un reseau de telecommunications - Google Patents

Systeme et procede de traitement assurant la portabilite d'un numero dans un reseau de telecommunications Download PDF

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Publication number
WO1997042776A2
WO1997042776A2 PCT/US1997/007484 US9707484W WO9742776A2 WO 1997042776 A2 WO1997042776 A2 WO 1997042776A2 US 9707484 W US9707484 W US 9707484W WO 9742776 A2 WO9742776 A2 WO 9742776A2
Authority
WO
WIPO (PCT)
Prior art keywords
database
signal transfer
transfer point
processors
set forth
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/US1997/007484
Other languages
English (en)
Other versions
WO1997042776A3 (fr
Inventor
Jeffrey D. Copley
Ronald B. Bell
Thomas L. Hess
William C. Johnson
Russell R. Cook
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.)
Alcatel USA Sourcing Inc
Original Assignee
DSC Telecom LP
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 DSC Telecom LP filed Critical DSC Telecom LP
Priority to AU29958/97A priority Critical patent/AU2995897A/en
Publication of WO1997042776A2 publication Critical patent/WO1997042776A2/fr
Publication of WO1997042776A3 publication Critical patent/WO1997042776A3/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
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/0029—Provisions for intelligent networking
    • H04Q3/005—Personal communication services, e.g. provisions for portability of subscriber numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/4228—Systems providing special services or facilities to subscribers in networks
    • H04M3/42297—Systems providing special services or facilities to subscribers in networks with number portability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13097—Numbering, addressing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13098—Mobile subscriber
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13102—Common translator
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13103—Memory
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13176—Common channel signaling, CCS7
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13513—UPT - personal as opposed to terminal mobility, inc. number portability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13547—Indexing scheme relating to selecting arrangements in general and for multiplex systems subscriber, e.g. profile, database, database access

Definitions

  • This invention is related in general to the field of telecommunications systems. More particularly, the invention is related to a system and method for number portability processing in a telecommunications network.
  • the network evolution as a result of the recent telecommunications bill has enhanced competition for local phone service. This increased competition has introduced the need for number portability.
  • Number portability allows a subscriber to change service provider, service, or geographic location while keeping their phone number. New number portability procedures are needed to determine how to route a call to a subscriber who has ported their number. These procedures force changes in existing network implementations. Current telecommunications network service providers and new and upcoming providers must standardize the exchange of routing information for proper call delivery and to support internetwork services.
  • SS7 query message is often needed for call setup to a portable number and for certain enhanced services.
  • a query to a number portability database may be required.
  • services such as line information database (LIDB) services, switch based services (SBS) such as certain Bellcore's CLASS ® services, calling name (CNAM) delivery, and interswitch voice messaging (ISVM)
  • GTT global title translation
  • the global title translation procedure performed for these query messages provides the necessary routing information to deliver the query to the proper database.
  • the signal transfer point was used to perform these global title translations.
  • the end application which may be a service control point (SCP) or a central office (CO) , is addressed as a result of a final global title translation, resulting in the delivery of the query to the appropriate database.
  • SCP service control point
  • CO central office
  • a service control point is typically coupled to the signal transfer point by an SS7 link set having a capacity limit of sixteen 56 Kb/s links.
  • the signal transfer point is, in turn, coupled to a plurality of central office (CO) switching systems, which are connected to the telephone customers.
  • CO central office
  • the query is sent from a central office switching system to a designated STP where a global title translation is performed.
  • the result of the translation procedure is SS7 routing information used to deliver the query to the proper network element.
  • a response message is then sent back to the originator of the query.
  • GTT databases in the past may route based on an office code since all phone numbers of the office code belonged to the same central office.
  • An office code is the first six digits of a telephone number.
  • an office code is insufficient.
  • Ten digits are needed for global title translation processing since phone numbers may be ported out of an office. To meet the need of ten digit global title translation, the number of entries in the GTT databases requires significant expansion.
  • a method for number portability processing includes the steps of receiving a query message by a signal transfer point, which requests information related to a specific telecommunications customer from a query originator, and looking up in a first database residing in the signal transfer point to determine the location of a second database residing in the signal transfer point for processing the query message. The second database is then accessed to obtain the requested information, which is delivered to the query originator.
  • a system for number portability processing in a telecommunications network provides a first cluster of processors adapted for receiving a query message requesting for information related to a specific telecommunications customer from a query originator, and a first database being accessible by the first cluster of processors and having location information of a second database.
  • the system further includes a second cluster of processors co-located with the first cluster of processors and being adapted for receiving the query message from the first cluster of processors, and a second database being accessible by the second cluster of processor and having the requested information.
  • the second cluster of processors is adapted for obtaining the requested information from the second database and forwarding the requested information to the first cluster of processors for further processing.
  • FIGURE 1 is a simplified block diagram of a portion of an exemplary telecommunications network
  • FIGURE 2 is a simplified block diagram of a portion of an exemplary telecommunications network according to the teachings of the present invention
  • FIGURE 3 is a simplified block diagram of an exemplary signal transfer point with vertical application subsystem according to the teachings of the present invention
  • FIGURE 4 is a simplified process flow diagram of global title translation according to the teachings of the present invention.
  • FIGURE 1 illustrates the telecommunications industry's current architecture 100 for call delivery and services.
  • Service control point (SCP) 102 is coupled to a signal transfer point (STP) 104 through a signalling system no. 7 (SS7) link set 106.
  • An SS7 link set may include up to sixteen 56 Kb/s links.
  • STP 104 is in turn coupled to one or more central offices (COs) 120 and 122 via SS7 link sets 124 and 126.
  • COs central offices
  • SCP 102 provides centralized database functions including a local number portability (LNP) database 150, a line information database (LIDB) 151, and a calling name (CNAM) database 152.
  • LNP local number portability
  • LIDB line information database
  • CNAM calling name
  • STP 104 includes global title translation (GTT) databases such as an LNP GTT 154, an LIDB GTT 156, switch based services GTT 158, CNAM GTT 160, and interswitch voice messaging (ISVM) GTT 162 databases containing routing data related to each service .
  • GTT global title translation
  • both central offices 120 and 122 are within a common area of number portability and both offices contain portable numbers.
  • customer 132 has ported to central office 122.
  • central office 120 When customer 130 calls customer 132, central office 120 must do a query to SCP 102 to obtain the necessary routing information.
  • This process first consists of performing a global title translation at STP 104. To do this, central office 120 sends the message to STP 104 via link set 124.
  • STP 104 upon receiving the query message, performs the global title translation procedure using LNP GTT database 154 which results in the routing address of SCP 102.
  • STP 104 then routes the query message to SCP 102 via link set 106.
  • SCP 102 then performs a LNP database 150 lookup and returns the requested routing information in a response message to central office 120 via link set 106, STP 104, and link set 124.
  • Central office 120 then uses the returned information to route the call over trunk 140.
  • another query is required if the called or calling party has subscribed to a service.
  • a global title translation and an information retrieval such as a database lookup is often required.
  • the central office needs to query SCP 102 to obtain the needed name information.
  • the query is first sent by central office 122 to STP 104 via link set 126.
  • STP 104 upon receiving the query message, performs the global title translation procedure using CNAM GTT database 160 which results in the routing address of SCP 102.
  • STP 104 then routes the query message to SCP 102 via link set 106.
  • SCP 102 then performs a CNAM database 152 lookup and returns the requested routing information in a response message to central office 122 via link set 106, STP 104, and link set 126.
  • Central office 122 uses the returned service information to deliver the name information to customer 132. As can be seen, this process again requires bandwidth from the limited capacity link set 106.
  • STP 204 may include GTT databases such as LNP GTT 250 and CNAM GTT 251, as well as LNP 252 and CNAM 253 databases that were resident in the SCP previously. Note that references to specific databases herein are merely exemplary and that other databases may also be located on STP 204 to perform global title translation and call delivery services.
  • both central offices 220 and 222 are within a common number portability area and both central offices contain portable numbers.
  • customer 232 has ported to central office 222.
  • central office 220 sends a query to obtain the necessary routing information to determine the location of customer 232.
  • This process first performs a global title translation at STP 204, by sending the message from central office 220 to STP 204 via link set 224.
  • STP 204 upon receiving the query message, performs the global title translation procedure using LNP GTT database 250.
  • the global title translation procedure in this example results in the routing address of STP 204.
  • STP 204 identifies that the message is destined to itself.
  • STP 204 then proceeds, under the teachings of this invention, to send the message to STP-resident LNP database 252.
  • STP 204 performs an LNP database 252 lookup and returns the requested routing information in a response message to central office 220 via link set 224.
  • Central office 220 then uses the returned information to route the call over trunk 240.
  • both database lookup steps were done at STP 204. No query to a remote database was needed for number portability, thus eliminating the need for a separate SCP and the links to a remote SCP.
  • another query is required if the called or calling party has subscribed to a service.
  • an additional global title translation and an information retrieval such as a database lookup is required.
  • the example of calling name delivery service is used.
  • the central office needs to obtain the required name information.
  • a query is first sent by central office 222 to STP 204 via link set 226.
  • STP 204 upon receiving the query message, performs the global title translation procedure using CNAM GTT database 251 which results in the routing address of STP 204.
  • STP 204 then performs a resident CNAM database 253 lookup and returns the requested service information in a response message to central office 222 via link set 226.
  • Central office 222 uses the returned service information to deliver the name information to customer 232.
  • global title translation procedures and database lookups are both done at STP 204. No query to a remote database was needed for the service thus eliminating the need for a separate SCP and the links to that SCP.
  • STP 300 includes a message transport network (MTN) backbone 301 which provides communication between clusters of processors.
  • MTN message transport network
  • One cluster of processors 302 may perform administration, maintenance, and communication functions for the system.
  • Another cluster 304 represents one or more SS7 clusters which process SS7 signalling messages that are transmitted on SS7 link sets.
  • SS7 cluster 304 includes a transport node controller (TNC) 306 coupled to common channel distributors (CCDs) 308 and common channel links (CCLKs) 310 via a network 312. Either of two hardware additions may be used on STP
  • TNC transport node controller
  • CCDs common channel distributors
  • CCLKs common channel links
  • VAS vertical application subsystem
  • EECs ethernet controllers
  • Ethernet controllers 324 are coupled to transport node controller 322 via a computer network 326 and to a predetermined number of vertical application subsystems (VAS) 328 via another ethernet network 330.
  • Each vertical application subsystem 328 preferably includes fault tolerant multiprocessor engines with built-in redundancy.
  • Data storage devices 332 are further coupled to vertical application subsystems 328.
  • Vertical application subsystems 328 may include redundant platform managers and a plurality of application processors with one or more back-up spare processors that can take up the load of failing or failed application processors.
  • a plurality of redundant vertical application subsystem processor pairs 358 may be added to provide GTT database and service database capabilities. These processors are coupled to a transport node controller 344 via an internal bus structure 346. Each processor pair 358 provides a query and global title translation processing transaction rate dependent on software design and processor speed. The number of processor pairs may be increased as needed to meet query and global title translation processing transaction demands. Additional bus structures 346 and associated transport node controllers 344 can also be added if offered load to an individual bus structure approaches or reaches capacity. Referring to FIGURE 4, a signalling connection control point (SCCP) query message arrives from a central office to a common channel distributor 308 via a common channel link 310 (FIGURE 3) .
  • SCCP signalling connection control point
  • GTT translation type
  • LOC GTT database location
  • the data is then obtained from the appropriate database or table 250-263 and processing of the query message is then completed in common channel distributor 308.
  • a response is then sent back to the central office, which then routes the call onto the proper trunk or provides the appropriate service response.
  • GTT databases may be located in any processor or processor pairs in STP 300.
  • any application that uses common channel signalling messages may be ported from databases residing in the SCPs to the STPs.
  • the STP is capable of processing the requests.
  • the bottleneck that exists in the SS7 link set between the SCP and the STP is eliminated. Therefore, the query response time is significantly less than that found in conventional telecommunications networks.
  • conventional networks are forced to add SCPs due to the limitation of the 16 SS7 links per link set between the STPs and SCPs.
  • the present invention eliminates the need to add new SCPs by performing global title translation and SCP query processing at the STP which has broader connectivity to query originators.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Computer And Data Communications (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)

Abstract

Système et procédé de traitement assurant la portabilité d'un numéro, en un point de transfert de signaux (204) comprenant des processeurs supplémentaires (328, 358) et des bases de données (332) chargés du traitement des acheminements et des interrogations de service. Lorsque le point de transfert de signaux (204) reçoit un message d'interrogation, une première base de données située dans le point de transfert de signaux (204) est interrogée pour déterminer l'emplacement d'une deuxième base de données (332) également située dans le point de transfert de signaux, afin de traiter le message d'interrogation. La deuxième base de données (332) est ensuite interrogée pour fournir les informations demandées, lesquelles sont transmises à l'expéditeur de l'interrogation, tel qu'un central téléphonique (220, 222).
PCT/US1997/007484 1996-05-03 1997-05-01 Systeme et procede de traitement assurant la portabilite d'un numero dans un reseau de telecommunications Ceased WO1997042776A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU29958/97A AU2995897A (en) 1996-05-03 1997-05-01 System and method for number portability processing in a telecommunications network

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US1656996P 1996-05-03 1996-05-03
US60/016,569 1996-05-03
US77196196A 1996-12-23 1996-12-23
US08/771,961 1996-12-23

Publications (2)

Publication Number Publication Date
WO1997042776A2 true WO1997042776A2 (fr) 1997-11-13
WO1997042776A3 WO1997042776A3 (fr) 1998-02-12

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AU (1) AU2995897A (fr)
TW (1) TW324802B (fr)
WO (1) WO1997042776A2 (fr)

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Publication number Priority date Publication date Assignee Title
WO2000051321A1 (fr) * 1999-02-23 2000-08-31 Automated Business Companies Systeme de fourniture de services telephoniques electroniques aux clients
EP1169829A4 (fr) * 1999-04-05 2003-05-14 Tekelec Us Procedes et systemes d'acheminement de messages de requete de service du nom de l'appelant dans un reseau de communications
US6647113B2 (en) 2000-05-05 2003-11-11 Tekelec Methods and systems for providing universal triggerless number portability
US6954526B1 (en) 1999-04-05 2005-10-11 Tekelec Methods and systems for routing calling name service query messages in a communication network
US8224337B2 (en) 2009-09-16 2012-07-17 Tekelec, Inc. Methods, systems, and computer readable media for providing foreign routing address information to a telecommunications network gateway
US8254553B2 (en) 2007-08-10 2012-08-28 Tekelec, Inc. Systems, methods, and computer program products for number translation with local directory number support
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US9088478B2 (en) 2010-02-12 2015-07-21 Tekelec, Inc. Methods, systems, and computer readable media for inter-message processor status sharing

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US7532647B2 (en) 2004-07-14 2009-05-12 Tekelec Methods and systems for auto-correlating message transfer part (MTP) priority and internet protocol (IP) type of service in converged networks
TWI425439B (zh) * 2010-11-09 2014-02-01 Chunghwa Telecom Co Ltd Method and system for judging the number of types of telecom operators by weight

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000051321A1 (fr) * 1999-02-23 2000-08-31 Automated Business Companies Systeme de fourniture de services telephoniques electroniques aux clients
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US6954526B1 (en) 1999-04-05 2005-10-11 Tekelec Methods and systems for routing calling name service query messages in a communication network
US6647113B2 (en) 2000-05-05 2003-11-11 Tekelec Methods and systems for providing universal triggerless number portability
US9043451B2 (en) 2007-07-31 2015-05-26 Tekelec, Inc. Methods, systems, and computer readable media for managing the flow of signaling traffic entering a signaling system 7 (SS7) based network
US8254553B2 (en) 2007-08-10 2012-08-28 Tekelec, Inc. Systems, methods, and computer program products for number translation with local directory number support
US8224337B2 (en) 2009-09-16 2012-07-17 Tekelec, Inc. Methods, systems, and computer readable media for providing foreign routing address information to a telecommunications network gateway
US9088478B2 (en) 2010-02-12 2015-07-21 Tekelec, Inc. Methods, systems, and computer readable media for inter-message processor status sharing

Also Published As

Publication number Publication date
TW324802B (en) 1998-01-11
AU2995897A (en) 1997-11-26
WO1997042776A3 (fr) 1998-02-12

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