GB2318701A - Intelligent network protocol gateway - Google Patents

Intelligent network protocol gateway Download PDF

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Publication number
GB2318701A
GB2318701A GB9622331A GB9622331A GB2318701A GB 2318701 A GB2318701 A GB 2318701A GB 9622331 A GB9622331 A GB 9622331A GB 9622331 A GB9622331 A GB 9622331A GB 2318701 A GB2318701 A GB 2318701A
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United Kingdom
Prior art keywords
intelligent
protocol message
message format
messages
gateway
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GB9622331A
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GB9622331D0 (en
Inventor
Zygmunt Anthony Lozinski
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International Business Machines Corp
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International Business Machines Corp
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Publication date
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Priority to GB9622331A priority Critical patent/GB2318701A/en
Publication of GB9622331D0 publication Critical patent/GB9622331D0/en
Publication of GB2318701A publication Critical patent/GB2318701A/en
Withdrawn legal-status Critical Current

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/08—Protocols for interworking; Protocol conversion
    • 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
    • H04Q2213/13204—Protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13345—Intelligent networks, SCP

Abstract

An intelligent gateway for use in an intelligent network for converting one protocol message format to another protocol message format, the gateway has a first interface connected to a source of messages of a first protocol message format, a second interface connected to a source of messages of a second protocol message format, and a conversion means located between the first and second interfaces for converting between the two message formats. The conversion means may be a look-up table.

Description

INTELLIGENT NETWORK PROTOCOL GATEWAY Field of the Invention The present invention relates to a so-called "Intelligent" Network (IN) for connecting telephones and providing added capabilities to a standard telephone network.
Background of the Invention In standard telephone networks switching equipment located at the service switching point (SSP) nearest the caller uses the number dialled by the caller in order to route the call to the called party through various intermediate SSPs. Computer-based Intelligent Networks (IN's) have been developed to provide more "intelligence" to an SSP. The most common example is in the toll free ("800-type") call environment where, using an IN, an SSP can analyze not only the dialled phone number but also the time and geographic location of the call to route the call to the most appropriate call handling centre. For example, when a company provides such a toll free call service in a geographic area having a plurality of time zones, the IN would make sure that a call is forwarded to a call service centre which is still open for business that day.
As shown in Fig. 1, when a call is originated at calling telephone 1 over telephone line 10, the SSP 2 receives the call and passes call data to a Service Control Point (SCP) 4 over Wide Area Network (WAN) 8a.
SCP 4 analyzes information related to the call and sends switching control data over WAN 8a to control the switching action of SSP 2. SSP 2 then performs a corresponding call switching operation to route the call to an appropriate further SSP 5 over telephone line network 11 where the call is in turn forwarded to an appropriate called telephone 6 or 7 connected to SSP 5 via telephone lines 12 and 13, respectively.
IN's are implemented by programmed high capacity computers and are well known in the art. See, e.g., Intelligent Networks Basic Technology, Standards and Evolution by T. Magedanz et al, 1996, International Thomson Computer Press, incorporated herein by reference. Each component of the IN can be located on a separate physical machine in a separate physical location, since a WAN is used as the connection backbone.
In Fig. 1 an Intelligent Peripheral (IP) is shown as a further element of an IN. It is also connected to the SCP 4 using WAN 8b. It is connected to SSP 2 using an ISDN (Integrated Services Digital Network) line 9. The IP acts as the "mouthpiece" for the SCP 4, providing automated voice functions to the SSP for communicating with the calling party 1 or called party 6, 7. For example, the IP can be used to allow the calling party 1 to choose amongst a menu of information items which will be provided by the SCP 4. For example, the menu could be "Press 1 on your telephone keypad to route your call to our customer services department, Press 2 to route your call to our finance department" etc.
The SCP 4 sends a control message to the IP 3 to tell the IP 3 to send a vocal menu to the SSP 2 (for transfer to the calling party 1) over telephone line 10 and to collect digits from the calling party. The IP 3 then sends a vocal menu to the SSP 2 and collects digits entered through the calling party's keypad and passed over phone line 10 to SSP 2. IP 3 then passes the collected data to SCP 4 over WAN 8b.
The IP 3 can also be used for voice dialling applications, where the calling party 1 need only speak the words, for example, "phone home" and the SSP 2 sends this voice unit over ISDN line 9 to IP 3 which communicates with SCP 4 to look-up the caller's home phone number and connect the caller to his home phone by sending the appropriate control signals over WAN 8a to SSP 2.
The IN configuration of Fig. 1 is that used in North America. In other parts of the world a very similar configuration is used as shown in Fig. 2. The components of the IN perform the same functions as their North American counterparts. That is, Service Resource Function (SRF) 23, Service Control Function (SCF) 24 and Service Switching Function (SSF) 22 are the respective counterparts of the North American IP 3, SCP 4 and SSP 2. However, in North America the messaging format protocol SR3511 (also known as 1129+) is used to send commands and data between the IN components, while in other areas the Core INAP messaging format protocol is used.
The details of the SR-3511 protocol are provided in the publication ISCP-IP Interface SDecification Issue 1, October 1995, version 4.0 by Bell Communications Research (Bellcore) of Piscataway, New Jersey in the United States of America. Bellcore documents can be obtained by contacting Bellcore Customer Service, 8 Corporate Place, Room 3A-184, Piscataway, New Jersey 08854-4156. The details of the Core INAP protocol are provided in the publication ETSI ETS 300 374-1 "Intelligent Network Capability Set 1 (CS1) Core Intelligent Network Application Protocol (INAP) Part 1: Protocol Specification" Sept. 1994, which can be obtained by contacting The European Telecommunications Standards Institute, 06921 Sophia Antipolis Cedex France. These latter two publications describing the two messaging formats in detail are herein incorporated by reference.
Because of this geographic difference in IN messaging protocols, IN products developed for use in one geographic area cannot be used in another geographic area. This greatly limits the geographic use of such products. For example, it is not possible for a North American IP 3 to be used outside of North America in the IN of Fig. 2. The SCF 24 would not understand the SR-3511 messages sent over WAN 28b from IP 3.
Conversely, the IP 3 would not understand the Core INAP messages sent from the SCF 24. This decreases competition amongst IN product vendors resulting in potentially higher costs and lower product quality to IN product buyers.
Since a WAN is used to connect the IN components, the backbone is there for providing global connection between IN products, such as a North American IP 3 communicating in a global IN with a European SCF 24.
However, the messaging protocol difference prevents such international connection.
Summarv of the Invention According to one aspect, the present invention is drawn to an intelligent gateway for use in an intelligent network for converting one protocol message format to another protocol message format, said gateway comprising: first interface connected to a source of messages of a first protocol message format; second interface connected to a source of messages of a second protocol message format; and a conversion means located between said first and second interfaces for converting between said first protocol message format and said second protocol message format.
According to another aspect, the present invention is drawn to a method of using non-compatible intelligent network elements together in the same intelligent network, comprising steps of: connecting a first intelligent network element having a particular protocol message format into an intelligent network which uses a different protocol message format; and connecting an intelligent gateway between said first intelligent network element and other elements of said intelligent network.
The present invention allows, for example, a North American Intelligent Peripheral (IP) to be used in a non-North American Intelligent Network (IN). A messaging format protocol gateway, for converting SR-3511 messages into Core INAP messages and for converting Core INAP messages into SR-3511 messages, is placed in a non-North American IN between a Service Control Function (SCF) element and a North American IP. In this way the non-North American Service Resource Function (SRF) normally used in a non-North American IN can be replaced by the North American IP and the SR-3511/Core INAP gateway, according to a preferred embodiment.
This makes the North American IP much more useful in that it can be used worldwide in Intelligent Networks. This provides enhanced incentives for developers of North American IP products to undertake the necessary research and development involved in creating improved IP products. Further, such IP manufacturers can offer a standardized global support service for their IP products. Competition in non-North American IN markets will also be greatly increased, leading to lower costs and better quality IP products worldwide.
Brief Description of the Drawings Fig. 1 shows a conventional North American Intelligent Network; Fig. 2 shows a conventional non-North American Intelligent Network; and Fig. 3 shows a non-North American Intelligent Network fitted with a North American Intelligent Peripheral and an Intelligent Gateway according to a preferred embodiment of the present invention.
Detailed DescriDtion of the Preferred Embodiments In the non-North American IN of Fig. 2, the SRF 23 is replaced by the North American IP 3 with the addition of an Intelligent Gateway (IG) 300 placed between the IP 3 and the SCF 24, according to a preferred embodiment of the present invention as shown in Fig. 3.
SR-3511 protocol messages sent out from IP 3 are converted to Core INAP protocol messages by IG 300 for communication with the SCF 24.
Likewise, Core INAP protocol messages sent out from SCF 24 are converted to SR-3511 protocol messages by IG 300 for communication with the IP 3.
The IG 300 thus maps the Core INAP message format protocol to the SR 3511 message format protocol and also maps the SR 3511 message format protocol to the Core INAP message format protocol. IG 300 can be implemented as a separate physical device or combined with the IP 3 as a separate software layer.
The IG 300 converts between the two messaging format protocol on a real time basis, according to the preferred embodiment. For example, when the IP 3 sends a message (in the SR 3511 format) to the SCF 24, the IG 300 intercepts this message and converts it into one or more Core INAP format messages for sending to the SCF 24. According to one embodiment, the IG 300 contains a conversion table with the different SR 3511 messages stored alongside the corresponding Core INAP messages. In this latter embodiment, there could be one SR 3511 message stored corresponding to a plurality of Core INAP messages (and vice versa).
When IG 300 receives an SR 3511 message it accesses its conversion table and outputs the corresponding Core INAP message(s).
The tables below illustrate an abbreviated version of this conversion table showing a few SR 3511 messages stored alongside their Core INAP equivalents. The IG 300 stores, for each of the two formats, the constituent parameters making up each message, including any header information such as originating and responding transaction identifiers.
SR3511 IP and Core-INAP SCF The left hand of the diagram shows the Intelligent Peripheral 3, and the right side shows the SCF 24. In general in the explanations that follows, we do not specify the mapping of the TCAP headers since both SR3511 and Core-INAP use similar TCAP encodings. Neither do we specify the mapping of all parameters, only those which are most significant in each message.
IP to SCF Flows Provide Instructions Intelligent Peripheral SR-3511 to Core-INAP SCF Gateway
Provide Instructions Assist Request Instructions The SR-3511 Provide Instructions message is mapped to the Core-INAP AssistRequestInstructions message by the gateway 300.
Parameter Mapping
SR-3511 Parameters Core INAP Parameters Notes TCAP Header The gateway must Originating allocate a Transaction ID corresponding SCF Transaction ID and return the pair to the IP in future messages as defined in SR-3511 section 5.2 Digits (dialled AssistRequestInstructionsArg.
number) CorrelationId AssistRequestlnstructionsArg. Defined by network IP Available operator and inserted by gateway based on configuration parameters AssistRequestInstructionsArg Defined by network IPSSPCapabiliites operator and inserted by gateway based on configuration parameters All other AssistRequestInstructionsAr.
parameters from ExtensionField ProvideInstructions Call Info From Resource Intelligent Peripheral SR-3511 to Core-INAP SCF Gateway
CallInfoFromResource Specialised Resource Report The CallInfoFromResource SR-3511 message, when used to report the status of a PlayAnnouncement, is mapped to the Specialised ResourceReport CoreINAP message.
SR-3511 Parameter Core INAP Parameter I Notes TCAP Header The gateway must Originating allocate a Transaction ID corresponding SCF Transaction ID and return the pair to the IP in future messages as defined in SR3511 section 5.2 TCAP Header See above Responding Transaction ID TCAP Header Invoke (not Last) Return Result ComponentTypeID CallinfoFromResource no corresponding Sending OperationStatus parameter SpecialisedResource Report message conveys success Call Info From Resource Intelligent Peripheral SR-3511 to Core-INAP SCF Gateway
CallInfoFromResource Return Result for Prompt And Collect User Information The CallInfoFromResource SR3511 message, when used to return collected user input, is mapped to the Return Result of the PromptAndCollectUserInformation CoreINAP message.
II Parameter Core INAP Parameter Notes TCAP Header The gateway must Originating Transaction allocate a ID corresponding SCF Transaction ID and return the pair to the IP in future messages as defined in SR-3511 section 5.2 TCAP Header See above Responding Transaction ID TCAP Header Invoke (not Last) Return Result ComponentTypeID CallInfoFromResource OperationStatus CallInfoFromResource PromptAndCollectUser IPReturnBlock Info AnnouncementDigitResult digitsResponse Collected Digits CallInfoFromResource No corresponding IPReturnBlock CoreINAP parameter AnnouncementDigitResult Interrupt Status SCF to IP Flows Play Announcement Intelligent Peripheral SR-3511 to Core-INAP SCF Gateway
Play Announcement Call Info To Resource -Play Announcement -StayOnLine = 1 The PlayAnnouncement CoreINAP message is mapped to the CallInfoToResource message with the a ResourceType parameter of PlayAnnouncement.
Parameter Mapping:
SR-3511 Parameter CoreINAP Parameter Notes TCAP Header The gateway must Originating allocate a Transact ion corresponding SCF ID Transaction ID and return the pair to the IP in future messages as defined in SR-3511 section 5.2 TCAP Header See above Responding Transaction ID CallInfoToResource Set to ResourceType PlayAnnouncement [OxOO] CallInfoToResource PlayAnnouncementArg IpStayOnLine disconnectFromIPFor bidden CallInfoToResource PlayAnnouncementArg StrParameterBlock infotoSend is mapped into a single AnnouncementBlock Prompt And Collect User Information Intelligent Peripheral SR-3511 to Core-INAP SCF Gateway
PromptAndCollectUser Information Call Info To Resource -Play Announcement And Collect Digits -StayOnLine = 1 The PromptAndCollectUserInformation CoreINAP message is mapped to the CallInfoToResource SR-3511 message with a ResourceType parameter of PlayAnnouncementAndCollectDigits.
SR-3511 Parameter I CoreINAP Parameter I Notes TCAP Header The gateway must Originating Transaction allocate a ID corresponding SCF Transaction ID and return the pair to the IP in future messages as defined in SR-3511 section 5.2 TCAP Header. See above Responding Transaction TD CallInfoToResource Set to PlayAnnouncement [OxOO] CallInfoToResource PlayAnnouncementArg IpStayOnLine disconnectFromIPFor- bidden CallInfoToResource PlayAnnouncementArg StrParameterBlock infotoSend is mapped into a single AnnouncementBlock In a similar way, all SR 3511 messages and associated parameters can be mapped to corresponding Core INAP messages/parameters and vice versa via the Intelligent Gateway.
As another embodiment, a finite state machine may be used to perform the conversion/mapping.
While the preferred embodiment has been described with respect to a North American IP being inserted in a non-North American IN, the invention is broader than this and also encompasses a non-North American Service Resource Function (SRF) unit being inserted into a North American IN with the addition of the IG. Also, it is not only the IP (and its corresponding SRF) that can be ported into a different IN but also a SCP or SCF can be so-ported. For example, a North American SCP can be inserted into a non-North American IN (along with the IG) to replace the SCF.

Claims (10)

What is claimed is:
1. An intelligent gateway for use in an intelligent network for converting one protocol message format to another protocol message format, said gateway comprising: first interface connected to a source of messages of a first protocol message format; second interface connected to a source of messages of a second protocol message format; and a conversion means located between said first and second interfaces for converting between said first protocol message format and said second protocol message format.
2. The intelligent gateway of claim 1 wherein said first interface is connected to an intelligent peripheral of said intelligent network.
3. The intelligent gateway of claim 1 wherein said second interface is connected to a service control function unit of said intelligent network.
4. The intelligent gateway of claim 1 wherein said conversion means comprises a list of messages of said first protocol message format and a corresponding list of messages of said second protocol message format.
5. The intelligent gateway of claim 1 wherein said protocol message formats are Core INAP and SR-3511.
6. A method of using non-compatible intelligent network elements together in the same intelligent network, comprising steps of: connecting a first intelligent network element having a particular protocol message format into an intelligent network which uses a different protocol message format; and connecting an intelligent gateway between said first intelligent network element and other elements of said intelligent network.
7. The method of claim 6 wherein said protocol message formats are SR-3511 and Core INAP.
8. The method of claim 6 wherein said intelligent gateway includes a conversion table having a list of messages of said first protocol message format and a corresponding list of messages of said second protocol message format.
9. The method of claim 6 wherein said first element is an intelligent peripheral.
10. The method of claim 6 wherein one of said other elements is a service control function unit of said intelligent network.
GB9622331A 1996-10-26 1996-10-26 Intelligent network protocol gateway Withdrawn GB2318701A (en)

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EP0996297A1 (en) * 1998-10-22 2000-04-26 Alcatel Gateway between a data network and a service network
EP1009171A1 (en) * 1998-12-10 2000-06-14 Alcatel Gateway in an intelligent network
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Cited By (24)

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WO1999009693A2 (en) * 1997-08-13 1999-02-25 Siemens Aktiengesellschaft Information transfer method and device
WO1999009693A3 (en) * 1997-08-13 1999-05-06 Siemens Ag Information transfer method and device
EP0996297A1 (en) * 1998-10-22 2000-04-26 Alcatel Gateway between a data network and a service network
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EP1009171A1 (en) * 1998-12-10 2000-06-14 Alcatel Gateway in an intelligent network
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WO2000079756A2 (en) * 1999-06-18 2000-12-28 Telefonaktiebolaget Lm Ericsson (Publ) System and method for providing value-added services (vas) in an integrated telecommunications network using session initiation protocol (sip)
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US6625141B1 (en) 1999-06-18 2003-09-23 Telefonaktiebolaget L M Ericsson (Publ) System and method for providing value-added services (VAS) in an integrated telecommunications network using session initiation protocol (SIP)
GB2351414A (en) * 1999-06-22 2000-12-27 Ericsson Telefon Ab L M Call set-up in a telecommunications network
SG129290A1 (en) * 1999-10-26 2007-02-26 Pingtel Corp Distributed communications network including one or more telephony communication devices having programmable functionality
WO2001039458A2 (en) * 1999-11-26 2001-05-31 Honeywell Ag Method for guaranteeing the exchange of data between several devices
WO2001039458A3 (en) * 1999-11-26 2001-12-06 Honeywell Ag Method for guaranteeing the exchange of data between several devices
FR2809505A1 (en) * 2000-03-20 2001-11-30 Ibm Corp Internat Business Mac Access to services using service control points and intelligent peripherals operating on public switched networks, uses protocol translation at central controller to extend range of services accessible to user
DE10139866A1 (en) * 2001-08-14 2003-03-13 Siemens Ag Method and device for transmitting messages in an intelligent network
US20150256513A1 (en) * 2002-09-20 2015-09-10 Fortinet, Inc. Firewall interface configuration to enable bi-directional voip traversal communications
US9497166B2 (en) * 2002-09-20 2016-11-15 Fortinet, Inc. Firewall interface configuration to enable bi-directional VoIP traversal communications
US9860215B2 (en) 2002-09-20 2018-01-02 Fortinet, Inc. Firewall interface configuration to enable bi-directional VoIP traversal communications
US7734691B2 (en) 2003-12-18 2010-06-08 International Business Machines Corporation Providing collaboration services to a wireless device
US10471348B2 (en) 2015-07-24 2019-11-12 Activision Publishing, Inc. System and method for creating and sharing customized video game weapon configurations in multiplayer video games via one or more social networks
US10835818B2 (en) 2015-07-24 2020-11-17 Activision Publishing, Inc. Systems and methods for customizing weapons and sharing customized weapons via social networks

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