procedure and system for optimizing the route of a telecommunication connection to be set up in a telecommunication system that includes a mobile switching center (MSC), a service switching point (SSP), a service control point (SCP), a gateway (GW), and a subscriber register (HLR). The service switching point is connected to the service control point and the gateway is connected to the service control point and to the subscriber register. The telecommunication connection to be set up is directed via the service switching point to the service control point. A database query is sent from the service control point, via the gateway, to the subscriber register. In response, the subscriber register returns routing information, on the basis of which an optimal route to the mobile switching center under which the B-subscriber is currently located is determined.
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10. In a system for optimizing a route of a telecommunication connection to be set up between a calling subscriber and a called subscriber iD a telecommunication system that includes a mobile switching center, a service control point, a service switching point connected to the service control point, and a subscriber register, and wherein the telecommunication connection to be set up is directed to the service control point via the service switching point, the improvement comprising:
a gateway connected to the service control point and to the subscriber register, said gateway comprising:
means for handling a database query, a signaling query, a database query response and a signaling query response;
means for receiving a database query from said service control point;
means for changing said database query to said signaling query;
means for sending said signaling query to said subscriber register;
means for receiving a signaling query response from said subscriber register;
means for changing said signaling query response to said database query response; and
means for sending said data query response to said service control point.
0. 11. A method comprising:
receiving, at a gateway, a database query from a service control point;
converting, at the gateway, the database query received from the service control point into a signaling query;
sending, from the gateway, the signaling query to a subscriber register;
receiving, at the gateway, a signaling query response from the subscriber register comprising routing information in a first format;
converting, at the gateway, the signaling query response comprising routing information in the first format into a database query response comprising the routing information in a second format; and
sending, from the gateway, the database query response comprising the routing information in the second format to the service control point,
wherein, in response to receiving the database query response, the service control point determines an optimal route to a mobile switching center serving the called terminal based on the database query response comprising routing information in the second format, and directs a service switching point to conduct routing for connection setup to the mobile switching center serving the called terminal.
0. 23. A system comprising:
a service control point;
a service switching point;
a subscriber register; and
a gateway configured to:
receive a database query from the service control point;
convert the database query received from the service control point into a signaling query;
send the signaling query to the subscriber register;
receive, from the subscriber register, a response to the signaling query, the response comprising routing information in a first format;
convert the received response comprising routing information in the first format into a database query response comprising the routing information in a second format; and
send the database query response comprising the routing information in the second format to the service control point,
wherein, in response to receiving the database query response, the service control point is configured to determine an optimal route to a mobile switching center serving the called terminal based on the database query response comprising the routing information in the second format, and direct the service switching point to conduct routing for connection setup to the mobile switching center serving the called terminal.
1. A procedure for route optimization of a telecommunication connection to be set up between a calling subscriber and a called subscriber in a telecommunication system that includes a mobile switching center, a service control point, a service switching point connected to the service control point, a subscriber register, and a gateway connected to the service control point and to the subscriber register, comprising the steps of:
directing the telecommunication connection to be set up to the service control point via the service switching point;
performing a database query directed from the service control point and addressed to the subscriber register; and
determining an optimal route to the mobile switching center currently serving the called subscriber based on a response from the subscriber register to the database query;
wherein said performing step comprises:
directing the database query from the service control point to the subscriber register via the gateway;
converting, in the gateway, the database query from the service control point into a signaling query;
sending the converted signaling query from the gateway to the subscriber register;
defining, at the subscriber register, a signaling query response to the converted signaling query;
sending the signaling query response from the subscriber register to the gateway;
converting, in the gateway, the signaling query response to a responsive database query; and
returning the responsive database query from the gateway to the service control point.
2. The procedure of
generating optimized routing information for the telecommunication connection between the calling subscriber and the called subscriber using the responsive database query received by the service control point; and
setting up the telecommunication connection to the mobile switching center currently serving the called subscriber using the generated routing information to thereby establish an optimized route between the calling subscriber and the called subscriber.
3. The procedure of
4. The procedure of
5. The procedure of
6. The procedure of
0. 12. The method of claim 11, wherein the service control point generates the database query in response to an incoming call received from the service switching point.
0. 13. The method of claim 11, wherein the gateway is a mobile application part-intellectual network application part (MAP-INAP) gateway.
0. 14. The method of claim 11, wherein the gateway is integrated with the service control point.
0. 15. The method of claim 11, wherein the gateway is an independent service node.
0. 16. The method of claim 11, wherein the subscriber register is a home location register.
0. 17. The method of claim 11, wherein the routing information is a roaming number associated with the called terminal.
0. 18. The method of claim 11, wherein the signaling query response is based on information provided by a visitor location register.
0. 19. The method of claim 11, wherein the signaling query response includes a call forwarding number.
0. 20. The method of claim 11, wherein the signaling query response includes information indicating that the called terminal cannot be reached.
0. 21. The method of claim 11, wherein the gateway is part of a telecommunication system including the mobile switching center, the service control point, the service switching point communicatively connected to the service control point, and the subscriber register.
0. 22. The method of claim 21, wherein the gateway is configured to handle the database query, the signaling query, the database query response, and the signaling query response.
0. 24. The system of claim 23, wherein the service control point is configured to generate the database query in response to an incoming call received from the service switching point.
0. 25. The system of claim 23, wherein the gateway is a mobile application part-intellectual network application part (MAP-INAP) gateway.
0. 26. The system of claim 23, wherein the gateway is integrated with the service control point.
0. 27. The system of claim 23, wherein the gateway is an independent service node.
0. 28. The system of claim 23, wherein the subscriber register is a home location register.
0. 29. The system of claim 23, wherein the routing information is a roaming number associated with the called terminal.
0. 30. The system of claim 23, wherein the received response to the signaling query is based on information provided by a visitor location register.
0. 31. The system of claim 23, wherein the received response to the signaling query includes a call forwarding number.
0. 32. The system of claim 23, wherein the received response to the signaling query includes information indicating that the called terminal cannot be reached.
0. 33. The system of claim 23, wherein the system further comprises the mobile switching center, and wherein the service switching point is communicatively connected to the service control point.
0. 34. The system of claim 33, wherein the gateway is configured to handle the database query, the database query response, the signaling query, and the response to the signaling query.
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The present application is a reissue application of U.S. Pat. No. 6,628,951 which claims priority to PCT Application PCT/FI1998/001010 filed Dec. 21, 1998, and Finnish Application No. FI974590 filed Dec. 22, 1997.
1. Field of the Invention
The present invention relates to telecommunication technology and, more particularly, the invention is directed to optimization of the route of a telecommunication connection that is set up in a mobile communication network.
2. Description of Related Art
For a teleoperator, i.e. an owner or operator of a telecommunications network, it is important that telecommunication connections be set up in an optimal manner. Optimization may for example be based on the length of the route of the connection or on the network load resulting from the connection. Because the traffic in mobile communication networks is continuously increasing, it is particularly important that the load in such networks remain as low as possible. One approach to reducing the load in a mobile communication network is to set up or establish the connection to the mobile switching center then serving the called subscriber via a route that is as short as possible.
An intelligent network is formed by switching, control and functional components and a signaling network. A service switching point (SSP) of such intelligent networks is a modified telephone exchange that analyzes the traffic passing therethrough. When the SSP detects a certain number that meets a triggering criterion, it transmits a service request to a service control point (SCP). The information required for service control is stored in a service data point (SDP), from which the service control point can obtain the information that it needs.
Service switching points are connected via signaling channels to service control points, which implement intelligent network services by utilizing a service database. A service control point may for example perform a numerical conversion from the B-number to the corresponding C-number by accessing such correspondence information from the service database.
The communication protocols used in an intelligent network are rules by which the components of the intelligent network talk to each other. These protocols defme the interfaces between components as well as the structure of the messages exchanged between them. Intelligent network components communicate with each other using common channel signaling (CCS). By ITU-T definition, common channel signaling is known as CCSS No 7. For communication between components, an intelligent network uses the services of the INAP (Intelligent Network Application Part) defined by ITU-T; the INAP application part is an intelligent network application protocol used, for example, for communication between a service control point and a service switching point. The MAP application part, on the other hand, is a portion of the signaling system of a mobile communication network that is used for signaling between the switching centers and registers of the mobile communication network.
In the GSM (Global System for Mobile communications) system, a call to be set up or established is routed as follows. A call setup request is sent from the calling subscriber's (A-subscriber's) terminal equipment to a gateway mobile switching center (GMSC), which then sends a query to the called subscriber's (B-subscriber's) home location register (HLR) to determine the mobile switching center (MSC) under which the B-subscriber's terminal device is currently located. The home location register is implemented as a database that contains such information as subscriber data, subscriber location data, call control data, short-message services and billing data.
Next, the home location register requests the visitor location register (VLR) for a roaming number MSRN (Mobile Subscriber Roaming Number) and returns the roaming number to the GMSC. The visitor location register is implemented as a database in a mobile communication network which contains the information required for the transmission of calls about each mobile subscriber currently located in the area of the network. The roaming number is a temporary identification number that is allocated to a mobile station recorded in the visitor location register and which is used by the mobile communication system for the muting of calls addressed to that particular subscriber.
Based on the roaming number, the GMSC then routes the call originated by the A-subscriber to the mobile switching center in whose location area (LA) the B-subscriber is currently located. The B-subscriber's mobile switching center in turn sets up a connection with the B-subscriber's terminal device.
The primary problem with the above-described routing procedure is that calls addressed to mobile stations are not automatically routed via the shortest route to the proper mobile switching center but may, instead, be routed via several switching centers. One solution that has been applied to eliminate this problem is to provide some service nodes (SN) and service control points with an MAP interface, thus making it possible to implement functionality and service similar to that provided by present invention. Such solutions, however, disadvantageously they bind the service to a certain base and assume that the service control point or service node is provided with an MAP interface.
In the procedure of the present invention, on the other hand, the routing of calls addressed to a terminal device is optimized by using an intelligent network service and a special gateway. By means of that gateway, a query is sent from the intelligent network system to a subscriber register to obtain B-subscriber data and, using that data, the call to be set up is routed directly to the mobile switching center in whose area the B-subscriber's terminal device is currently located. This arrangement and methodology additionally makes it possible to utilize other GSM network services.
It is accordingly the desideratum of the present invention to eliminate, or at least significantly reduce, the drawbacks and deficiencies of the prior art, as for example described hereinabove.
It is a particular object of the invention is to provide a new type of procedure and system for routing a new call being set up directly to the mobile switching center under which the B-subscriber is currently located.
The procedure of the invention is thus utilized to optimize the route of a telecommunication connection to be set up, as for example and preferably in a mobile communication system.
The telecommunication system of the present invention comprises a mobile switching center, a service switching point, a service control point, a gateway, and a subscriber register. The service switching point is connected to the service control point, and the subscriber register and service control point are connected to the gateway. The gateway further comprises means for handling a database query, a signaling query, a response to a database query, and a response to a signaling query.
In the method of the present invention, a telecommunication connection to be set up is directed via the service switching point to the service control point. From the service control point, a database query is performed, which is directed to the gateway. The database query is converted in the gateway into a signaling query which is sent to the subscriber register. Using the data in the subscriber register, a response to the signaling query is defined and returned to the gateway, at which the response to the signaling query is converted to a response to the database query, on the basis of which the service control point determines an optimal route to the appropriate mobile switching center.
In preferred embodiments of the invention, the response to the signaling query contains routing information which is used to optimize the route of the telecommunication connection to the mobile switching center. A connection to the mobile switching center, and further by way of example to the B-subscriber's terminal device, is then set up. The routing information may for example be a roaming number, such preferably as the Mobile Subscriber to Roaming Number MSRN.
In the same or other preferred embodiments of the invention, the gateway may be an MAP-INAP gateway, which comprises means for controlling the interface between the service control point and the database and means for controlling the interface between the gateway mobile services switching center and the subscriber register. The signaling query is preferably an MAP (Mobile Application Part) query and the database query an SDP (Service Data Point) query. As a consequence of this arrangement, the service control point of the intelligent network is able to use the subscriber data of the GSM network.
In these or other preferred embodiments of the invention, the subscriber register may be the home location register of the GSM system.
The present invention thus allows optimal routing to the mobile switching center under which the B-subscriber is then or currently located. If, according to the data in the visitor location register, the subscriber cannot be reached, then corresponding information is obtained. If the subscriber has transferred his or her calls to another number using the CFU (Call Forwarding Unconditional) supplementary service, this too will be known so that the call can be properly routed to the specified forward number.
As will be further appreciated, the inventive solution advantageously does not require any changes in the elements of the mobile communication network or in the intelligent network because the invention implements the enhanced service through the use of a separate MAP-INAP base.
Other objects and features of the present invention will become apparent from the following detailed description considered in conjunction with the accompanying drawings. It is to be understood, however, that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the invention, for which reference should be made to the appended claims.
In the drawings, wherein like reference numerals denote similar elements and method steps throughout the several figures:
The signaling diagram in
The system configured in accordance with the present invention and illustrated in
In the signaling diagram of
In the signaling diagram of
The routing query is then sent from the gateway GW to the called or B-subscriber's home location register, at which a response to the signaling query is defined utilizing the data in the home location register HLR. The signaling query response consists of routing information, preferably a roaming number identified with the B-subscriber. The home location register returns the routing information to the gateway GW, which then performs a conversion so from the signaling query response to a database query response. The routing information is thus converted into a form understood by the service control point SCP. Based on the database query response received, the service control point next causes the service switching point to route the call directly to the mobile switching center under which he B-subscriber's terminal device is currently located.
The invention herein described and disclosed is based in part on commonly-owned Finnish Patent Application No. 982168 entitled “Procedure and System for the Transmission of Information and Setting Up of a Telecommunication Connection”, the entire disclosure of which is hereby expressly incorporated by reference herein.
While there have shown and described and pointed out fundamental novel features of the invention as applied to preferred embodiments thereof, it will be understood that various omissions and substitutions and changes in the form and details of the methods and procedures described and devices illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those elements and/or method steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. Moreover, it should be recognized that structures and/or elements and/or method steps shown and/or described in connection with any disclosed form or embodiment of the invention may be incorporated in any other disclosed or described or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.
Ala-Luukko, Sami, Grohn, Tuomo, Pera, Olli, Sarkki, Mika
Patent | Priority | Assignee | Title |
10474676, | Jun 12 2012 | International Business Machines Corporation | Database query language gateway |
9384248, | Jun 12 2012 | International Business Machines Corporation | Database query language gateway |
Patent | Priority | Assignee | Title |
5504804, | Jan 19 1994 | Telefonaktiebolaget LM Ericsson | Providing individual subscriber services in a cellular mobile communications network |
5572579, | Apr 06 1995 | Intellectual Ventures II LLC | System and method for providing portable telephone number service |
5839072, | Jun 03 1996 | Ericsson Inc. | Routing an incoming call to a ported mobile station within a telecommunications network |
5890063, | Jun 03 1996 | Ericsson Inc. | Downloading of routing numbers to donor switches within a telecommunications network |
5901359, | Jan 03 1997 | Qwest Communications International Inc | System and method for a wireline-wireless network interface |
5953673, | Jun 10 1994 | NOKIA SIEMENS NETWORKS GMBH & CO KG | Method of establishing a connection between a calling subscriber of a telecommunications network and a called mobile target subscriber of a mobile radio network |
5978673, | Dec 13 1996 | Ericsson Inc. | Providing location-based call forwarding within a mobile telecommunications network |
6011838, | Jun 06 1997 | BELLSOUTH INTELLECTUAL PROPERTY GROUP, INC ; Bellsouth Intellectual Property Corporation | Process and system for dynamically measuring switch traffic |
6032043, | Sep 25 1996 | Telefonaktiebolaget L M Ericsson (publ) | Home location register feature dispatching and arbitration in a wireless intelligent network |
6101387, | Nov 17 1997 | Telefonaktiebolaget LM Ericsson | Providing notification of location dependent services to mobile stations |
6115600, | Dec 23 1994 | CALLAHAN CELLULAR L L C | Method for improving charging criteria in a mobile telephone network |
6128503, | Dec 08 1997 | Telefonaktiebolaget LM Ericsson | Method and apparatus for coordinating mobile communications network services with intelligent network services |
6175622, | Feb 18 1997 | Apple Inc | Virtual private network for a telephone network |
WO9417644, | |||
WO9714262, | |||
WO9856206, |
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