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WO2010060087A2 - Systèmes, procédés et supports lisibles par ordinateur pour traduction sensible au lieu du numéro de la partie appelée dans un réseau de télécommunications - Google Patents

Systèmes, procédés et supports lisibles par ordinateur pour traduction sensible au lieu du numéro de la partie appelée dans un réseau de télécommunications Download PDF

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Publication number
WO2010060087A2
WO2010060087A2 PCT/US2009/065745 US2009065745W WO2010060087A2 WO 2010060087 A2 WO2010060087 A2 WO 2010060087A2 US 2009065745 W US2009065745 W US 2009065745W WO 2010060087 A2 WO2010060087 A2 WO 2010060087A2
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WO
WIPO (PCT)
Prior art keywords
message
query
signaling
calling party
location
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Ceased
Application number
PCT/US2009/065745
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English (en)
Other versions
WO2010060087A3 (fr
Inventor
Raghavendra Gopala Rao
Devesh Agarwal
Adam B. Roach
Peter Joseph Marsico
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Tekelec Global Inc
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Tekelec Inc
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Publication of WO2010060087A2 publication Critical patent/WO2010060087A2/fr
Publication of WO2010060087A3 publication Critical patent/WO2010060087A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/029—Location-based management or tracking services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/10—Mapping addresses of different types
    • H04L61/106—Mapping addresses of different types across networks, e.g. mapping telephone numbers to data network addresses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/45—Network directories; Name-to-address mapping
    • H04L61/4557—Directories for hybrid networks, e.g. including telephone numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/52—Network services specially adapted for the location of the user terminal
    • 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
    • H04M3/42306—Number translation services, e.g. premium-rate, freephone or vanity number services
    • 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
    • H04M3/42348—Location-based services which utilize the location information of a target
    • H04M3/42357—Location-based services which utilize the location information of a target where the information is provided to a monitoring entity such as a potential calling party or a call processing server
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/0025—Provisions for signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/72—Finding out and indicating number of calling subscriber
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/76—Translation from the called subscriber's number to the outgoing or incoming control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00—Indexing scheme associated with group H04L61/00
    • H04L2101/60—Types of network addresses
    • H04L2101/618—Details of network addresses
    • H04L2101/65—Telephone numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00—Indexing scheme associated with group H04L61/00
    • H04L2101/60—Types of network addresses
    • H04L2101/69—Types of network addresses using geographic information, e.g. room number
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1096—Supplementary features, e.g. call forwarding or call holding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2207/00—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place
    • H04M2207/12—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place intelligent networks

Definitions

  • the subject matter described herein relates to providing a service in a telecommunications network. More particularly, the subject matter described herein relates to systems, methods, and computer readable media for location- sensitive number translation in a telecommunications network.
  • a toll-free number is a telephone number in which the cost of the call is charged to the called party rather than to the calling party.
  • telephone numbers are of the form NPA-NXX-YYYY, where NPA is the numbering plan area code, roughly corresponding to a particular geographical area, and NXX is the exchange, which identifies a physical switching facility, called a central office (CO).
  • CO central office
  • the remaining digits, YYYY identify a line card within the CO.
  • a toll-free number may have an "8XX" area code (e.g., 800, 877, 866, etc.), that does not correspond to any geographical location of the called party, and thus cannot be used by itself to determine the destination of the call or how it should be routed. For this reason, switches in conventional telecommunications networks that provide toll free service must send a query to a toll-free database to determine the true destination of the toll-free called party.
  • a query to a toll-free database is herein referred to as a "toll-free query.”
  • a toll-free query typically includes the toll-free number, and the response to the toll-free query typically includes the directory number to which the toll-free number is mapped.
  • Tekelec, Incorporated provides a toll-free number "1-800-TEKELEC" (1-800-835-3532) for sales inquiries.
  • This toll-free number may be mapped to a local directory number for Tekelec corporate world headquarters in Morrisville, North Carolina, which is 919-460-5500.
  • a toll-free query for 800-835-3532 would return the directory number 919-460-5500.
  • Businesses often use a toll-free number as the primary telephone number for callers to use, because the same toll-free number may be used by a caller regardless of the geographical location of the caller.
  • the savings to the business from using the same toll-free number in advertisements around the country, continent, or world, on company business cards and letterhead, and so on, may outweigh the additional expense incurred by the business of paying for the calls.
  • a toll-free number that is very easy for customers or potential customers to remember, as in the 1-800-TEKELEC example, above, may even increase that business organization's sales, help it achieve high name recognition, or provide some other tangible or intangible benefit.
  • business entities or organizations that have a large or dispersed physical presence in the form of branch offices, service centers, or restaurants in different geographic locations may desire that a call made to the organization be directed to whichever branch office is geographically closest to the calling party.
  • a fictional take-out pizza restaurant chain having stores in multiple geographic locations may desire that calls to its toll-free number, e.g., 1-800-GO-PIZZA (1-800-467-4992), be routed to the pizza restaurant closest to the geographic location of the calling party.
  • the toll-free query must provide location information for the calling party, and the toll-free database must be able to use this calling party location information to select the appropriate directory number.
  • calling- party-location-sensitive called party number translation The ability to consider the location of the calling party as part of the process of performing a number translation is herein referred to as calling- party-location-sensitive called party number translation, which may be abbreviated to "location-sensitive called party number translation” , or simply “location-sensitive number translation", for short.
  • the toll-free query issued by a switch may include the toll-free called party number, but no calling party information. Even if the toll-free query includes calling party information, that calling party information may not indicate the geographic location of the calling party, such as where the calling party number is a mobile subscriber number, in which case the mobile subscriber may be calling from anywhere within the cellular network. Even if the toll-free query includes information that does give some indication of the location of the calling party, conventional toll-free databases may not support calling party information as an input parameter to a toll-free query. The same problems apply to other number translation services that are not location-sensitive. Accordingly, in light of these disadvantages associated with conventional approaches to providing called-party number translation in a telecommunications network, there exists a need for improved systems and methods for providing location-sensitive called-party number translation in a telecommunications network.
  • the subject matter described herein includes a method for providing location-sensitive called-party number translation in a telecommunications network.
  • the method includes, at a signaling node that includes at least one processor: receiving a first signaling message that includes a called party number; determining proximity information associated with the calling party; performing a location-sensitive called party number translation based on the proximity information associated with the calling party; and sending the first signaling message or a second signaling message, the sent message including the translated called party number.
  • the subject matter described herein includes a system for providing location-sensitive called-party number translation in a telecommunications network.
  • the system includes a signaling node for receiving a first signaling message that includes a called party number, and a proximity processing module, operatively associated with the signaling node, for determining proximity information associated with the calling party, performing a location-sensitive called party number translation based on the proximity information associated with the calling party, and sending the first signaling message or a second signaling message, the sent message including the translated called party number.
  • the subject matter described herein for location-sensitive number translation in a telecommunications network may be implemented in hardware, software, firmware, or any combination thereof.
  • the terms “function” or “module” as used herein refer to hardware, software, and/or firmware for implementing the feature being described.
  • the subject matter described herein may be implemented using a computer readable medium having stored thereon computer executable instructions that when executed by the processor of a computer control the computer to perform steps.
  • Exemplary non-transitory computer readable media suitable for implementing the subject matter described herein include disk memory devices, chip memory devices, programmable logic devices, and application specific integrated circuits.
  • a computer readable medium that implements the subject matter described herein may be located on a single device or computing platform or may be distributed across multiple devices or computing platforms.
  • Figure 1 is a block diagram illustrating an exemplary system for providing location-sensitive called-party number translation according to an embodiment of the subject matter described herein;
  • Figure 2A is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein;
  • Figure 2B is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein;
  • Figure 3 is a flow chart illustrating an exemplary process for providing called-party number translation in a telecommunications network according to an embodiment of the subject matter described herein;
  • Figure 4 is a block diagram illustrating an exemplary signaling message routing node for providing toll-free service in a telecommunications network according to another embodiment of the subject matter described herein;
  • Figure 5 is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein, in which a number portability query is used to determine the proximity information associated with the calling party;
  • Figure 6A is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein;
  • Figure 6B is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein;
  • Figure 6C is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein
  • Figure 6D is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein
  • Figure 7A is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein
  • Figure 7B is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein
  • Figure 8 illustrates some of the various allowed formats for E.164 numbers.
  • systems, methods, and computer readable media are provided for location-sensitive called-party number translation in a telecommunications network.
  • FIG. 1 is a block diagram illustrating an exemplary system for providing location-sensitive called-party number translation according to an embodiment of the subject matter described herein.
  • a telecommunications network 100 includes a first switch (S1) 102, via which a subscriber 104 accesses network 100.
  • S1 102 is the switch that services a calling party
  • S1 102 may also be referred to as the "originating switch”.
  • S1 102 may be a service switching point (SSP), such as an end office (EO) for servicing wireline subscribers.
  • SSP service switching point
  • EO end office
  • S1 102 may be a mobile switching center (MSC) for servicing wireless or mobile subscribers, a tandem office (TO), a call session control function (CSCF), a Softswitch (SS), or any other type of switch in a telecommunications network.
  • MSC mobile switching center
  • TO tandem office
  • CSCF call session control function
  • SS Softswitch
  • Network 100 includes a signaling node 106, such as a signaling message routing node, for routing signaling messages within network 100.
  • signaling node 106 is a signal transfer point (STP).
  • signaling node 106 may be a signaling gateway (SGW), a Softswitch (SS), a media gateway controller (MGC) 1 a media gateway (MGW), or other entity for routing signaling messages within network 100.
  • SGW signaling gateway
  • SS Softswitch
  • MSC media gateway controller
  • MGW media gateway controller
  • network 100 may include a proximity processing module (PRXM) 108 for determining proximity information associated with the calling party and using the proximity information to translate or map called party information.
  • PRXM 108 may determine proximity information associated with either calling subscriber 104, originating switch 102, or both.
  • the calling party proximity information may directly identify the geographic location of subscriber 104 or S1 102, and may include, for example, information such as the latitude and longitude, GPS location information, or other form of geographic coordinates of the subscriber or switch.
  • the calling party proximity information may indirectly identify the geographic location of a subscriber or switch, and may include information identifying the switch, such as the switch address or switch ID.
  • the calling party proximity information may include, for example, the address or ID of the mobile switching center currently serving the subscriber, the cell ID, the geographic location of the switch, MSC, base station subsystem or other component of the cellular network, and so on.
  • the calling party proximity information may be unrelated to the geographic location.
  • the calling party proximity information may relate to topological proximity, where the topological proximity of one node to another node may be defined by the number of intermediate nodes, or "hops", between the two nodes, path costs, or some other metric.
  • PRXM 108 is a component of signaling node 106, but in alternative embodiments, PRXM 108 may be located remotely from signaling node 106. In one example implementation, the functions of PRXM 108 may be performed in whole or in part by a service capabilities interaction manager function, such the TekSCIM ® product, available from Tekelec of Morrisville, North Carolina.
  • a service capabilities interaction manager is described in commonly-assigned U.S. Patent Application Serial No. 12/106,807, entitled “Systems, methods, and computer program products for providing service interaction and mediation in a communications network", filed on April 21 , 2008, the disclosure of which is incorporated by reference herein in its entirety.
  • the location-sensitive number translation service provided by network 100 may be a location-sensitive toll-free service, in which a toll-free called party number is mapped to one of multiple directory numbers associated with that toll-free called party number based on whichever directory number is most proximate to the calling party.
  • network 100 may include a location-sensitive toll-free database (TFDB) 110 for mapping toll-free numbers, such as 1-8XX numbers in the United States, to a directory number.
  • TFDB location-sensitive toll-free database
  • Table 1 An example location-sensitive toll-free database is shown in Table 1, below.
  • Each row in Table 1 represents an entry in TFDB 108, and each entry maps a toll-free number (TFN), shown in the left column, to a DN, shown in the right column, based on calling party proximity information (CGPI), shown in the middle column.
  • TFN toll-free number
  • DN DN
  • CGPI calling party proximity information
  • a directory number may also be referred to as a "B-party number”.
  • rows 1 and 2 show that the first toll-free number (800) 345-
  • the first toll-free number is mapped to a directory number based on an area code; it can be said that the first toll-free number has a geographic resolution at the area code level.
  • rows N through ⁇ /+3 show that the second toll-free number (800) 254- 9990 is mapped to a local directory number at a finer geographic resolution, e.g., at the exchange level. In this manner, the level of geographic resolution can vary according to need.
  • a toll-free number may be mapped to one of only two choices, such as a west coast number and an east coast number.
  • a toll-free number may be mapped to as many geographic domains as the toll-free database may support.
  • the location-sensitive called party number translation service provided by network 100 may be a location-sensitive E.164 telephone number mapping (ENUM) service, in which an E.164-format called party number is mapped to one of multiple Internet protocol (IP) addresses associated with the E.164-format called party number based on whichever IP address is most proximate to the calling party.
  • network 100 may include an ENUM database (ENUMDB) 112 for mapping E.164 telephone numbers to IP addresses.
  • ENUM database An example ENUM database is shown in Table 2, below. Table 2 - Location-Sensitive ENUM Database (ENUMDB) row
  • Each row in Table 2 represents an entry in ENUMDB 112, and each entry maps an E.164 subscriber ID (E.164 ID), shown in the left column, to a uniform resource identifier (URI), shown in the right column, based on proximity information (Pl), shown in the middle column.
  • E.164 ID E.164 subscriber ID
  • URI uniform resource identifier
  • Pl proximity information
  • the value of the E.164 ID column shown in Table 2, above could be in E.164 format (e.g., 8.7.6.5.4.4.4.0.0.8.1.0) or in directory number format (e.g., 018004445678).
  • the E.164 IDs shown in Table 2 are in directory number format.
  • ENUMDB 112 may map E.164 numbers to IP addresses.
  • the proximity information can take on various forms.
  • the proximity information may be global positioning system (GPS) coordinates that define a position, such as a location on the surface of the earth, including height above or below the surface of the planet. Other positioning coordinate systems may also be used.
  • the proximity information may be in the form of a proximity ID that identifies an object whose location is known or is readily determinable.
  • the proximity information stored in ENUMDB 112 may be position of the URI, in which case the query message to ENUMDB 112 may include the position of the calling party (or of the switch that is serving the calling party) along with the called party number.
  • ENUM DB 112 may select records whose E.164 ID value matches the called party number, calculate a geometric distance between the calling party and the Pl value for each selected record, and then select the record with the smallest calculated difference.
  • the record thus selected includes the URI of the server that is geographically closest to the calling party.
  • the proximity information stored in ENUM DB 112 refers to the location of the respective URI.
  • the proximity information stored in ENUMDB 112 may define an area served by the respective URI.
  • the query message to ENUMDB 112 may including the position of the calling party or originating switch.
  • ENUMDB 112 may determine whether the calling party position falls within an area served by a URI, and if so, respond to the ENUM query with that URI.
  • the proximity information stored in ENUM DB 112 refers to the allowable locations that the calling party may be in order for that calling party's call to be redirected to that particular URI.
  • the proximity information stored in ENUMDB 112 may identify the switch from which the call originates, in which case the proximity ID may be the switch ID, the switch address, or the switch name.
  • the proximity ID may be the switch ID, the switch address, or the switch name.
  • ENUMDB 112 may avoid the need to calculate distance between the calling party and the URI or determine whether the calling party is located within an area served by the URI.
  • the Pl field of ENUMDB 112 stores location information for the URI.
  • ENUMDB 112 would calculate a distance from the calling party location to each URI and then select the closest URI.
  • ENUMDB 112 need only store, for each called party number, a record for each possible destination URI. For example, if the called party number can only be routed to one of two destination URIs, then ENUMDB 112 may need only store two records for that called party number.
  • the Pl field of ENUMDB 112 may contain a switch ID.
  • ENUMDB 112 may avoid the need to calculate distance, but it may instead require that ENUMDB 112 include a record for each potential originating switch ID. In a network with only two destination URIs but dozens of potential originating switches, this second approach may require that ENUMDB 112 contain dozens of records, rather than just the two records required under the first approach.
  • network 100 may support number portability.
  • network 100 may include a number portability database (NPDB) 114, which maps a ported subscriber's directory number (DN) to the routing number (RN) of the recipient switch.
  • NPDB number portability database
  • PRXM 108 may use NPDB 114 to determine calling party proximity information, as will be illustrated in Figure 5 and described below.
  • network 100 may support mobile subscribers.
  • network 100 may include a home location register and/or home subscriber server (HLR/HSS) 116 for maintaining information for each mobile subscriber, including information about the current location of a roaming mobile subscriber.
  • HLR/HSS home subscriber server
  • PRXM 108 may use HLR 116 to determine calling party proximity information, as will be illustrated in Figure 7B and described below.
  • Other databases may be used, as well, including location servers, presence servers, and the like.
  • network 100 may include a proximity information database (PRXDB) 118 for mapping proximity information to geographic location, such as GPS coordinates.
  • PRXDB proximity information database
  • An example proximity information database is shown in Table 3, below. Each row of Table 3 represents an entry in PRXDB 118, and each entry maps a proximity ID, shown in the left column, to GPS coordinates, shown in the right column.
  • the proximity information may be a switch ID or switch address, or other proximity information associated with the calling party.
  • PRXM 108 may use PRXDB 118 to determine that switch MSCJD1 is located at GPS coordinates (P 1 Q 1 R). PRXM 108 may then include those GPS coordinates in the query message and forward the modified number translation request to the appropriate database (e.g., TFDB 110, ENUMDB 112, NPDB 114, HLR/HSS 116.) Like PRXM 108, above, PRXDM 116 may be internal or external to signaling node 106.
  • a number translation request such as a toll-free query or an ENUM query
  • network 100 includes a second switch (S2) 120, which serves toll-free called party 122.
  • S2 120 When a switch, such as S2 118, services a called party, such as called party 122, that switch may also be referred to as the "terminating switch".
  • S2 120 may be an SSP, an EO, an MSC, a TO, a CSCF, an SS, or other type of switching point.
  • FIG 2A is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein.
  • FIG. 2A illustrates an embodiment of a location- sensitive toll-free service, in which the location of the calling party is considered while performing the toll-free lookup of the called party.
  • a telecommunications network 200 that supports mobile subscribers includes a mobile switching center, S1 102, which currently serves a mobile subscriber 104 who is making a call to a toll-free called party number 800-234-5678.
  • Mobile subscriber 104 has a mobile phone number "MS#”
  • S1 102 has a switch identity "MSCJD”.
  • S1 102 sends a toll-free query (Figure 2A, message 1 ), such as a transactions capabilities part (TCAP) message, that includes parameters or fields for the called party number (CDPN) and the calling party number (CGPN).
  • TCAP transactions capabilities part
  • This message also includes the calling party address used by the SCCP protocol (SCCP_CGPA), which is the address of the switch that issued the message, MSCJD.
  • SCCP_CGPA SCCP protocol
  • the message may be an advanced intelligent network (AIN), wireless intelligent network (WIN), or customized applications for mobile networks enhanced logic (CAMEL) query.
  • signaling node 106 which in the embodiment illustrated in Figure 2A is an STP, and is processed by the proximity processing module PRXM 108.
  • the calling party identifier i.e., the mobile subscriber's cell phone number, MS#
  • PRXM 108 determines proximity information associated with the calling party.
  • originating switch S1 102 is associated with a geographic location, and thus PRXM 108 may use information identifying S1 102 as the proximity information associated with the calling party.
  • the proximity information associated with the calling party may be the switch ID, which is stored in the calling party address information field contained in the SCCP portion of a intelligent network (IN) query message.
  • the proximity information associated with the calling party may include an SS7 point code address contained within the message transfer part (MTP) layer of an SS7 or SIGTRAN-based message.
  • MTP message transfer part
  • PRXM 108 may then either modify the original query message or generate a new query message and send this message (Figure 2A, message 2) to TFDB 110.
  • this message the value that was stored in the original calling party number field CGPN has been changed from the mobile subscriber number, MS#, to the switch ID of the originating switch S1 102, MSCJD.
  • TFDB 110 receives the modified message and performs a toll-free query on the called party number, using the calling party proximity information stored in the CGPN field, and returns a directory number ( Figure 2A, message 3), hereinafter referred to as the translated DN.
  • PRXM 108 then forwards the translated DN to S1 102 ( Figure 2A, message 4).
  • the toll-free query ( Figure 2A 1 message 1) that is sent from S1 102 may not include any calling party number information, i.e., the message may not include a CGPN field, or the CGPN field may be blank.
  • PRXM 108 may create a CGPN field or parameter and populate that field with the proximity information associated with the calling party as described above.
  • Such an embodiment would look very much like the embodiment illustrated in Figure 2A, except that the first message ( Figure 2A, message 1), would not contain a CGPN field or the CGPN field would be blank.
  • FIG. 2B is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein.
  • S1 102 is a central office or end office that serves a fixed line subscriber 104 having a telephone number, 919-313-4545.
  • S1 102 issues a toll-free query (Figure 2B, message 1) to TFDB 110, the toll-free query including the called party number, the calling party number, and the calling party address information in the SCCP portion of the message.
  • the calling party address is the switch ID for the end office, EO1JD.
  • Signaling node 106 intercepts the toll-free query, and PRXM 108 modifies the query by replacing the calling party number with the end office ID, EO1JD, and forwards the modified query to TFDB 110 (Figure 2B, message 2).
  • TFDB 110 performs a toll-free query using the proximity information for the calling party, end office identifier EO1JD, to determine the directory number that is most proximate to the calling party.
  • TFDB 110 returns the selected DN ( Figure 2B, message 3), which signaling node 106 forwards to S1 102 ( Figure 2B, message 4).
  • Figure 3 is a flow chart illustrating an exemplary process for providing location-sensitive called-party number translation in a telecommunications network according to an embodiment of the subject matter described herein.
  • a first signaling message containing a called party number, is received at a signaling node that includes at least one processor.
  • the first signaling message may include, but is not limited to, a call setup message, a toll-free query, and an ENUM query.
  • S1 102 may send a call setup message, such as an ISUP initial address message (IAM), an ISUP subsequent address message (SAM), a bearer-independent call control (BICC) message, or a SIP INVITE message, that includes the called party number.
  • IAM ISUP initial address message
  • SAM ISUP subsequent address message
  • BICC bearer-independent call control
  • SIP INVITE SIP INVITE message
  • calling subscriber 104 may be a mobile subscriber and S1 102 may be a mobile switching center (MSC), which may issue a mobility management message, such as a mobile application part (MAP) send routing information (SRI) message, a MAP send routing information for short message (SRI_SM) message, an anytime interrogation (ATI) message, or an ANSI-41 location request (LOCREQ) message, that includes the called party number.
  • a mobility management message such as a mobile application part (MAP) send routing information (SRI) message, a MAP send routing information for short message (SRI_SM) message, an anytime interrogation (ATI) message, or an ANSI-41 location request (LOCREQ) message, that includes the called party number.
  • MAP mobile application part
  • SRI_SM MAP send routing information for short message
  • ATI anytime interrogation
  • LOCREQ ANSI-41 location request
  • calling subscriber 104 may be a wireline subscriber and S1 102 may be an end office (EO), a central office (CO), a service switching point (SSP), or similar entity, which may issue a call setup message that includes the toll-free called party number.
  • S1 102 may issue a number portability (NP) query that includes the called party number.
  • calling subscriber 104 may be a user agent client (UAC) in a session initiation protocol (SIP) network and S1 102 may be a SIP router, SIP application server (SAS), media gateway (MGW), or similar entity, which may issue SIP INVITE message, a number translation request, such as an ENUM query, or other message that includes the called party number.
  • UAC user agent client
  • SIP session initiation protocol
  • SAS SIP application server
  • MGW media gateway
  • proximity information associated with the calling party is determined.
  • PRXM 108 may extract information contained within the received message, such as: the name, number, address or other identifier of the calling party; GPS or other location information for the calling party; the name, number, address, or other identifier of the switch or node from which the first signaling message was sent; GPS or other location information for the switch or node from which the first signaling message was sent; or other information that is associated with the calling party.
  • the proximity information so extracted may be used directly.
  • the switch ID is the proximity information that was included in the toll-free query ( Figure 2A, message 1 ); that switch ID is included in the toll-free query sent to TFDB 110 ( Figure 2A, message 2).
  • the proximity information extracted from the received message may be mapped to another kind or form of proximity information.
  • PRXM 108 may use proximity database 118, which may operate as an origination point code (OPC) to routing number (RN) mapping database to translate the OPC of the received message to a routing number, which is then included in the toll-free query.
  • OPC origination point code
  • RN routing number
  • Table 4 An example of an OPC-to-RN database is shown in Table 4, below.
  • Each row of Table 4 represents an entry in PRXDB 118, and each entry maps an SS7 origination point code (OPC), shown in the left column, to a routing number (RN), shown in the right column.
  • OPC origination point code
  • RN routing number
  • the proximity information may come from sources other than data included in the received first signaling message. For example, if a signaling node has multiple ports, each port connecting to entities in different locations, the port number which received the message may indicate a geographic or topological proximity that may be associated with the calling party.
  • PRXM 108 may: issue a toll-free query to TFDB 108; issue a number portability query to NPDB 110; issue a mobility management query to HRL 112; issue an ENUM query to ENUM database 122; or some combination of the above.
  • the first signaling message or a second signaling message is sent, the sent message including the translated called party number.
  • the original message i.e., the first signaling message
  • a new message i.e., the second signaling message
  • a new signaling message may be generated and sent back to the sender of the first message, e.g., the second message may be a response to the first message query.
  • FIG. 4 is a block diagram illustrating an exemplary signaling message routing node 106 for providing location-sensitive called party number translation service in a telecommunications network according to another embodiment of the subject matter described herein.
  • signaling node 106 may be a signal transfer point (STP).
  • signaling node 106 includes a link interface module (LIM) 400, a data communications module (DCM) 402, and a database services module (DSM) 404.
  • LIM link interface module
  • DCM data communications module
  • DSM database services module
  • Each module 400, 402, and 404 may include a printed circuit board having one or more processors.
  • each module may include an application processor for performing application level processing of signaling messages, and a communications processor for controlling inter-processor communications via inter-processor communications system (IPC) 406.
  • IPC 406 may be any suitable mechanism for providing message communication between processing modules 400, 402, and 404.
  • IPC 406 may be a bus, an Ethernet LAN, or any other suitable mechanism for providing
  • LIM 400 includes various functions for sending and receiving signaling messages over SS7 signaling links.
  • LIM 400 includes a message transfer part (MTP) level 1 and 2 function 408, an I/O buffer 410, a gateway screening (GWS) function 412, a discrimination function 414, a distribution function 416, and a routing function 418.
  • MTP level 1 and 2 function 408 performs MTP level 1 and 2 functions, such as error detection, error correction, and sequencing of signaling messages.
  • I/O buffer 410 stores inbound signaling messages before the messages are processed by higher layers.
  • I/O buffer 410 also stores outbound signaling messages waiting to be transmitted over a signaling link by MTP level 1 and 2 function 408.
  • Gateway screening function 412 screens inbound signaling messages based on destination point code and, optionally, based on originating point code to determine whether the messages should be allowed into the network.
  • Discrimination function 414 analyzes the destination point code in each received signaling message to determine whether the signaling message should be processed by an internal processing module within node 106 or whether the message should be routed over an outbound signaling link.
  • Discrimination function 414 forwards messages that are to be internally processed to distribution function 416.
  • Distribution function 416 forwards messages that are to be routed over an outbound signaling link to routing function 418.
  • Distribution function 416 distributes messages that are identified as requiring internal processing to the appropriate internal processing module. For example, distribution function 416 may forward SCCP messages to database services module 404 for SCCP processing.
  • Routing function 418 routes signaling messages that are addressed to point codes other than the point code of node 106. For example, routing function 418 may forward messages to another link interface module (not shown in Figure 4) or to data communications module 402 for transmission over an outbound signaling link.
  • DCM 402 includes various functions for sending and receiving signaling messages over IP signaling links.
  • Example signaling messages include SS7 over IP messages, session initiation protocol (SIP) messages, and others.
  • SIP session initiation protocol
  • these functions include a physical layer function 420, a network layer function 422, a transport layer function 424, an adaptation layer function 426, and SS7 MTP functions 410, 412, 414, 416, and 418 as described with regard to LIM 400.
  • Physical layer function 420 may be any suitable physical layer function for sending and receiving frames that encapsulate network layer packets.
  • physical layer function 420 may be implemented using an Ethernet transceiver.
  • Network layer function 422 may be implemented using Internet protocol, such as IPv4 or IPv6.
  • Transport layer function 424 may be implemented using any suitable transport layer protocol.
  • Adaptation layer function 426 may be implemented using any suitable adaptation layer, including adaption layers for sending SS7 messages over IP.
  • adaptation layers suitable for use with the subject matter described herein include M3UA, M2PA, SUA, and TALI, as described in the correspondingly named IETF Internet drafts and RFCs.
  • the remaining functions of DCM 402 are the same as those described with regard to LIM 400. Hence, a description thereof will not be repeated herein.
  • DSM 404 includes various functions and databases for processing signaling messages.
  • DSM 404 includes a service selection function 428, a target message screening function 430, and a routing function 432.
  • Database services module 404 also includes proximity processing module (PRXM) 108 for determining proximity information associated with a calling party.
  • Service selection function 428 receives messages from interface processors and determines the type of service required for each message. For example, service selection function 428 may determine whether further screening of messages is required or whether the messages are simply to be global title translated and routed. For CAP or INAP messages, service selection function 428 may forward the messages to target message screening function 430.
  • Target message screening function 430 screens CAP or INAP messages received by DSM 404 to identify targeted message types.
  • target message screening function 430 may identify call setup messages, such as ISUP IAM or SAM, as a targeted message type requiring further processing.
  • targeted message screening function 430 may communicate with PRXM 108 to determine proximity information for a calling party.
  • PRXM 108 may process signaling messages associated with toll-free calls and determine the called party directory number associated with the toll-free called party that is most proximate geographically or topological ⁇ to the calling party.
  • Signaling node 106 may include one or more processors.
  • DSM 404 includes a processor 434.
  • each module within signaling node 106 may include one or more processors suitably programmed to perform some or all of the functions associated with the particular module, such as discrimination function 414, target message screening function 430, inter-processor communications 406, and so on.
  • PRXM 108 may receive a mobility management message related to a toll-free call. For example, PRXM 108 may receive an SRI message including a toll-free number. In response, PRXM 108 may identify the SRI message as one that requires toll-free processing and take appropriate action. For example, PRXM 108 may generate a TF query and send the generated query to TFDB 108 via LIM 400 or DCM 402 as appropriate. PRXM 108 may subsequently receive a response to the TF query, and perform additional queries to other databases as needed.
  • databases TFDB 108, NPDB 110, and HLR 112 are external to signaling node 106, which issues queries and receives responses via network 100.
  • signaling node 106 may include a local proximity information database 118.
  • DSM 404 may include an internal toll-free database, an internal number portability database, an internal HLR database, etc., or some combination of the above. It will be obvious to one of skill in the art that the subject matter described herein contemplates both internal and external, local and remote databases, in any combination.
  • database refers to a database, a table, a data structure, a portion of memory or data storage, or other means to store and retrieve data, in particular two pieces of data in a key/value relationship.
  • database query refers to not only a database query, but also a table lookup or access to a data structure, for example.
  • a database query such as may be used to determine a directory number associated with a toll-free called party number or to determine routing information associated with a directory number, could be performed using one or more protocols, including but not limited to a TCAP or MAP protocol, an Internet protocol (IP), a signaling connection and control part (SCCP) user adaptation (SUA) protocol, a session initiation protocol (SIP), or other protocols usable to perform a data query.
  • IP Internet protocol
  • SCCP signaling connection and control part
  • SIP session initiation protocol
  • FIG. 5 is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein, in which a number portability query is used to determine the proximity information associated with the calling party.
  • network 500 includes a central office, S1 102, that services a fixed-line subscriber 104 having a directory number 919- 313-4545, who is attempting to call toll-free number 800-234-5678.
  • S1 102 is associated with a local routing number, "LRN1”.
  • S1 102 determines that subscriber 102 is calling a toll-free number, and issues a toll-free query (Figure 5, message 1) to TFDB 110.
  • Signaling node 106 intercepts the toll-free query and passes it to proximity processing module PRXM 108.
  • PRXM 108 extracts the calling party number, e.g., 9193134545, and uses it in a number portability (NP) query (Figure 5, message 2) to number portability database NPDB 114.
  • NP number portability
  • PRXM 108 uses the NP query to determine a routing number for the calling party, which is returned by NPDB 114 ( Figure 5, message 3) to PRXM 108.
  • An example of an NP database is shown in Table 5, below.
  • Each row of Table 5 represents an entry in NPDB 114, and each entry maps an directory number or range of directory numbers, shown in the left column, to a routing number (RN), shown in the right column.
  • the routing number may also be a mobile switch routing number (MSRN), local routing number (LRN), or similar.
  • NPDB 114 Since subscriber 104 is a fixed line subscriber who is served by central office S1 102, NPDB 114 returns the local routing number associated with S1 102, "LRN 1".
  • the routing number LRN 1 is the proximity information associated with the calling party, which PRXM 108 will use in a query to TFDB 110 ( Figure 5, message 4). In one embodiment, the routing number may be appended or prepended to the calling party number in the TF query. Alternatively, the calling party number may be replaced by the routing number in the TF query.
  • TFDB 110 sends to PRXM 108 the translated directory number DN ( Figure 5, message 5) that is most proximate to calling party 104. Finally, signaling node 106 sends a toll-free response (Figure 5, message 6) that includes the translated DN associated with the called party.
  • FIG. 6A is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein.
  • a telecommunications network 600 that supports the session initiation protocol (SIP) includes a SIP proxy server S1 102 that is identified by the source proxy ID "PROXY1 ".
  • Calling party subscriber 104 which may be a UAC or other SIP- compatible device, may issue a call setup message, such as a SIP INVITE message, to a toll-free number, such as 800-234-5678.
  • the SIP INVITE message is forwarded through S1 102 and is received or intercepted by signaling node 106, which may be a SIP server / router (SSR).
  • signaling node 106 which may be a SIP server / router (SSR).
  • the SIP INVITE message ( Figure 6A, message 1) includes a TO field, identifying the destination of the message, 800-234-5678, a FROM field, identifying the URI of the message source, "CGPJJRI", and a SRCJ 3 RXJD field, which identifies the source proxy ID, "PROXY1".
  • the source proxy ID is the proximity information that is associated with the calling party
  • PRXM 108 includes an intermediate database 602 which maps source proxy ID to a dummy calling party number, which can then be used in a TF query to TFDB 110.
  • This mapping may implement a SIP redirect function, which maps a SIP proxy or proxy call session control function (P-CSCF) identifier or address to a dummy NPA-NXX or CGPN that is representative of a geographic area or region that is served by the SIP proxy / P-CSCF.
  • P-CSCF SIP proxy or proxy call session control function
  • the source proxy ID for S1 102 is mapped to a dummy calling party number of "919-469-0000", which PRXM 108 uses in a TF query ( Figure 6A, message 2) to location-sensitive TFDB 110.
  • the TF query includes the called party information, 800-234-5678, and at least some of the proximity information associated with the calling party, such as dummy CPGN 919-469-0000.
  • Location-sensitive TFDB 110 uses both pieces of information to determine the DN associated with the toll-free called party number that is most proximate to calling subscriber 104. Location-sensitive TFDB 110 then returns the selected DN ( Figure 6A, message 3) to PRXM 108.
  • PRXM 108 then uses this information to respond to the original SIP INVITE ( Figure 6A, message 1) with a SIP 3XX MOVED message ( Figure 6A, message 4), which includes destination information, i.e., the translated DN, which either S1 102 or calling subscriber 104 may used to restart the call to the translated DN address.
  • destination information i.e., the translated DN, which either S1 102 or calling subscriber 104 may used to restart the call to the translated DN address.
  • intermediate database 602 may map other identifiers, such as client IP addresses, to a temporary DN.
  • Client IP addresses which may be correlated with a smaller geographic region than a proxy, may be extracted from the bottom-most Via header field and/or he Contact header field of the INVITE message ( Figure 6A, message 1).
  • Other information that may be used as keys into intermediate database 602 include various access-information parameters from the P-Access-Network-lnfo header field, such as the Cell ID, which may be tightly correlated to a physical location.
  • Figure 6B is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein.
  • the first three messages, ( Figure 6B, message 1 , 2, and 3) are essentially the same as the first three messages of Figure 6A, and therefore their descriptions will not be repeated herein.
  • PRXM 108 sends a second signaling message ( Figure 6B, message 4) forward, using the translated DN supplied by TFDB 110 as the contact URI, instead of sending the SIP MOVED message back to S1 102, as was done in Figure 6A.
  • Figure 6C is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein.
  • Figure 6C illustrates yet another variation of telecommunication network 600.
  • the first three messages, ( Figure 6C, message 1 , 2, and 3) are essentially the same as the first three messages of Figure 6A, and therefore their descriptions will not be repeated herein.
  • PRXM 108 performs the additional step of mapping the translated DN that was received from TFDB 110 (Figure 6C, message 3) into a URI by issuing an ENUM query (Figure 6C, message 4) to ENUMDB 112 and receiving a response ( Figure 6C, message 5) that includes the URI corresponding to the translated DN.
  • PRXM 108 issues a SIP MOVED message ( Figure 6C, message 6) that includes the URI instead of the translated DN that is returned in Figure 6A.
  • Figure 6D is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein.
  • Figure 6D illustrates yet another variation of telecommunication network 600.
  • the first five messages, ( Figure 6D, message 1 , 2, 3, 4, and 5) are essentially the same as the first five messages of Figure 6C, and therefore their descriptions will not be repeated herein.
  • PRXM 108 sends a second signaling message (Figure 6D, message 6) forward, using the translated DN supplied byTFDB HO asthe contact URI, instead of sending the SIP MOVED message back to S1 102, as was done in Figure 6C.
  • FIG. 7A is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein.
  • Figure 7A illustrates an embodiment of a location- sensitive ENUM service, in which the location of the calling party is considered while performing the ENUM lookup of the called party.
  • a telecommunications network 700 that supports the session initiation protocol (SIP) includes a SIP proxy server S1 102 that is identified by the source proxy ID "PROXY1".
  • SIP session initiation protocol
  • S1 102 may, on behalf of calling party subscriber 104, issue an ENUM query (Figure 7A, message 1) to location- sensitive ENUM database ENUMDB 112, the query including the called party number, 800-444-5678, which in one E.164 number format is "8.7.6.5.4.4.4.0.0.8.1.0".
  • the ENUM query includes the source proxy ID of S1 102, "PROXY1".
  • the ENUM query is received by signaling node 106, which may be a SIP server / router (SSR).
  • SSR SIP server / router
  • PRXM 108 includes an intermediate database 702 which maps source proxy ID to proximity information associated with the calling party, which can then be used in an ENUM query to location sensitive ENUM database ENUMDB 112. Referring to intermediate database 702, the source proxy ID for S1 102, "PROXY1", is mapped to a set of GPS coordinates, (X 1 Y 1 Z), which PRXM 108 uses in an
  • ENUMDB 112 uses the calling party E.164 number and the proximity information GPS coordinates to return a URI ( Figure 7A, message 3) that is most proximate to the GPS coordinates (X,Y,Z) and thus most proximate to calling subscriber 104.
  • PRXM 108 may forward this
  • FIG. 7B is a block diagram illustrating signaling messages communicated within an exemplary system for providing location-sensitive called-party number translation according to another embodiment of the subject matter described herein.
  • long term evolution (LTE) network 700 includes an LTE mobility management entity (MME)-compliant switch S1 102, which has a source proxy ID "MME1".
  • MME LTE mobility management entity
  • S1 102 may, on behalf of calling party subscriber 104, issue an ENUM query (Figure 7B, message 1), for the called party number, 800-444-5678, which in E.164 number format is "8.7.6.5.4.4.4.0.0.8.1.0".
  • the ENUM query includes the source proxy ID of S1 102, "MME1", and the calling party identifier, "CGPID”.
  • the ENUM query is received by signaling node 106, which may be a SIP server / router (SSR).
  • SSR SIP server / router
  • PRXM 108 may maintain provisioned data that maps a node identifier to geo-location coordinates or a geo-location proximity identifier that is representative of the geographic area or region served by the node.
  • the mode identifier may be a SIP proxy, Softswitch, P-CSCF, LTE MME, or MSC server identifier (e.g., network node identifier, network address, IP address, URI, routing number, etc.) or address.
  • PRXM 108 may infer the source or originating proxy based on the signaling link or linkset, signaling association, signaling connection, signaling session, physical or logical port, etc., on which the ENUM query is received.
  • PRXM 108 extracts calling party / from party identification information generates a new query or modifies the original query, and forwards that query (Figure 7B, message 2) to a network element / register / server 116, such as an HSS, an HLR, a visitor location register (VLR), a location server, a presence server, etc., which responds with location information for the calling party ( Figure 7B, message 3), such as GPS coordinates or other form of geographic location information.
  • a network element / register / server 116 such as an HSS, an HLR, a visitor location register (VLR), a location server, a presence server, etc.
  • the location information associated with the calling party returned by server 116 may be in the form of network topological information, such as a switch identity or address!
  • PRXM 108 includes an intermediate database 704 which maps network topological information, such as switch identifiers, to proximity information associated with the calling party, such as geographic location information.
  • PRXM 108 may then use the geographic location information associated with the calling party in an ENUM query ( Figure 7B, message 4) to location sensitive ENUM database ENUMDB 112.
  • Location-sensitive ENUMDB 112 uses the calling party E.164 number and the proximity information GPS coordinates to return a URI ( Figure 7B, message 5) that is most proximate to the GPS coordinates (X 1 Y 1 Z) and thus most proximate to calling subscriber 104.
  • PRXM 108 may forward this ENUM response to the source of the original query ( Figure 7A, message 4.)
  • Figure 8 illustrates some of the various allowed formats for E.164 numbers.

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Abstract

On décrit des systèmes, des procédés et des supports lisibles par ordinateur destinés à une traduction de numéro sensible au lieu dans un réseau de télécommunications. Selon un aspect, la présente invention concerne un procédé comportant les étapes consistant, au niveau d’un nœud de signalisation comprenant au moins un processeur : à recevoir un premier message de signalisation comprenant un numéro de partie appelée ; à déterminer des informations de proximité associées à la partie appelante ; à effectuer une traduction sensible au lieu du numéro de la partie appelée sur la base des informations de proximité associées à la partie appelante ; et à envoyer le premier message de signalisation ou un deuxième message de signalisation, le message envoyé comprenant le numéro traduit de la partie appelée.
PCT/US2009/065745 2008-11-24 2009-11-24 Systèmes, procédés et supports lisibles par ordinateur pour traduction sensible au lieu du numéro de la partie appelée dans un réseau de télécommunications Ceased WO2010060087A2 (fr)

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