EP1378132A1

EP1378132A1 - Connection between communication networks using different signalling protocols

Info

Publication number: EP1378132A1
Application number: EP02761849A
Authority: EP
Inventors: Mohammad-Jalil Ahmadyar; Klaus Bachner; Wolfgang Endler; Wolfgang Kuhn
Original assignee: Siemens AG; Nokia Siemens Networks GmbH and Co KG
Current assignee: Nokia Solutions and Networks GmbH and Co KG
Priority date: 2001-04-11
Filing date: 2002-04-09
Publication date: 2004-01-07
Also published as: CN1513269A; US20040146154A1; BR0208892A; WO2002085042A1

Abstract

The invention relates to a method and a device for adapting different signalling protocols in fixed telephone networks and/or mobile radio networks (N1, N2). According to the invention, networks of various carries are connected together via a gateway (10) as opposed to an international gateway exchange (12).

Description

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international head offices as international transit offices.

The networks of the national operators are usually connected to the international head offices of the respective country via national bundles. Alternatively, the network of a national operator can be connected to the network of another national operator from the same country, which in turn is connected to the international head office of that country. In this case, international calls are forwarded to the international head office of the respective country via the network of the other national operator.

A so-called network identifier is provided to identify the signaling protocol. This provides for four values, two of which are reserved for labeling national and two for labeling international signaling protocols. The international signaling protocol between the international head offices is called INATO, the national signaling protocol of each operator is called NATO and the signaling protocol for connecting two national operators with NAT1. The fourth indicator INAT1 is currently hardly used.

The previous network architecture mandates the use of international head offices with interposed international signaling to connect the networks of national operators in different countries.

It is an object of the invention to show a way with which the networks of national operators in different countries can be connected to one another without the complex international head offices.

The object is achieved by the features of the invention. According to the invention, a gateway for adapting national signaling protocols are provided. A procedure for adapting national signaling protocols is also specified.

The object is achieved in particular by a method of the type mentioned at the outset, which uses a gateway as the central instance, the gateway carrying out the following steps:

- Receiving signaling data of a first network at a first interface of the gateway, the first

Interface corresponds to the protocol of the first network,

- Adaptation of the received signaling data to the requirements regarding the signaling of a second network and

- Transfer of the adapted signaling data via a second interface of the gateway to the second network.

Furthermore, the object is achieved by a method for adapting different protocols in networks, with a gateway being introduced as the central instance, which carries out the three steps just described.

A task solution also consists of a switching system for controlling a connection setup and clearing down of individual system components, consisting of: several networks, several roof systems, each of which is represented by a head office, one network being assigned to at least one roof system and the networks being different Signaling protocols can use, and a gateway as a central switching entity, with which at least some of the system components are connected, with: - a receiving unit for receiving signaling data of a first network at a first interface of the gateway, the first interface with the protocol of corresponds to the first network,

- a conversion unit for adapting the received signaling data to the requirements regarding the signaling of a second network and - a transmission unit for transmitting the adapted

Signaling data via a second interface of the gateway to the second network.

The protocol converter according to the invention for converting signaling protocols from several networks comprises:

- Several interfaces, each of which implement a signaling protocol of a network and

- Means for converting the signaling protocols by converting the respective protocol parameters, such as addresses, formats, codes, processing speeds, etc., are processed. The protocol converter thus converts protocols, in particular signaling protocols, between units that are not adapted to the protocols. It can be designed in software, in hardware or in mixed forms.

A task solution according to claim 17 consists of a computer-readable medium for storing computer software which, if loaded on a computer used as a gateway, causes the latter to carry out the following steps:

Receiving signaling data from a first network at a first interface of the gateway, the first interface corresponding to the protocol of the first network,

- Transfer of the adapted signaling data via a second interface of the gateway to the second network. ω cυ

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When connecting carriers in different countries, all the national-specific signals are either filtered or processed or implemented in such a way that they can be understood by the (signaling protocol of) the second network.

A further advantage lies in the connection of the gateway according to the invention to an international head office, because it enables those national networks that are not connected to the gateway according to the invention to be reached.

The gateway is preferably connected to an international head office using an international signaling protocol labeled INAT1. The signaling data can thus be assigned and / or processed in accordance with this identifier in the gateway and in the international head office.

So far, the coupling of different carriers in different countries has always been done via the respective head of the country. According to the invention, the carriers can now be connected directly via the gateway without the need to interpose a head office. On the one hand, this increases the efficiency of the connection and, on the other hand, there is a clear cost advantage due to the fact that no head office is involved.

Depending on the application, either each of the head offices or only a part of the head offices can be connected to the gateway.

Additional, advantageous embodiments result from the subclaims.

Further advantages of the invention and a special embodiment with its features are shown in the following detailed description of the figures. In it show:

FIG. 1 shows an international communication network architecture with a gateway according to the invention,

Figure 2 is a block diagram of a gateway according to the invention.

The following designations are used in the figures:

INATX Network identifier X of an international signaling protocol

NATX _YY Network identifier X of a national signaling protocol in country YY

SPC signaling point code

TGN Telecom Global Network

MICG Multi Interconnectable Gateway

ISUP ISDN User Part

ISDN Integrated Services Digital Network

CC Country Code

GB Great Britain

DE Germany

US United States of America

AT Austria

NX _YY National network of operator X in country YY

IKAγγ International Head Office of the country YY

In the following - with reference to FIG. 1 - the basic structure of several national carriers connected via the gateway according to the invention is briefly introduced.

The gateway 10 is introduced as a central switching entity.

In each of the participating countries there can be one or mostly several national networks N, which are operated by several carriers. These national networks N are to be interconnected in terms of switching technology. CO) K) K)

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The general structure of the system according to the invention will be explained using an exemplary embodiment with reference to FIG. 2:

The gateway 10, here also called MICG (Multi Interconnectable Gateway) 10, connects various carriers with each other and with any head offices or with international gateways via its various interfaces (INATX, NATX, ...). The MICG 10 can therefore in particular establish a connection between different carriers in different countries using the ISUP Q.767 protocol with the network indicator NATX. It also serves to connect a carrier with its own or a foreign international gateway. The ISUP Q.767 protocol with the network indicator INATX is used.

The abbreviation CC in FIG. 2 is intended to denote the "country code" of the respective country. SPC1, SPC2 and SPC3 refer to a signaling point code (SPC). SPC1 is a bilateral signaling point code between a Telekom Global Network (TGN) and a national carrier. SPC2 is part of a national operator network in another country and SPC3 is similar to SPC2. The signaling point code can also be understood as a country-specific, unique address of a switching entity or a switching office.

In the preferred embodiment, the network is a mobile radio network, in particular according to the GSM (Global System Mobile) or DCS standard (Digital Communications Systems) or an ISDN network and is operated by a carrier, in particular a national carrier.

It should be emphasized that the representation of the components relevant to the invention is in principle not to be understood as restricting. It is particularly obvious to a person skilled in the art that a term such as 'gateway' should be understood functionally and not physically. Thus, for example, a gateway can also be partially or completely implemented in software and / or distributed over several physical devices.

Claims

claims

1. A method for controlling a switching connection between at least two networks (Nl, N2) which can use different signaling protocols, a gateway (10) being introduced as the central instance, which carries out the following steps:

Receiving signaling data from a first network (Nl) at a first interface of the gateway (10), the first interface corresponding to the protocol of the first network (Nl),

- adapting the received signaling data to the requirements regarding the signaling of a second network (N2) and - transmitting the adapted signaling data via a second interface of the gateway (10) to the second network (N2).

2. Method for adapting different signaling protocols in networks (Nl, N2), with a gateway

(10) is introduced as a central authority, which carries out the following steps:

3. The method according to any one of the preceding claims, characterized in that the networks to be connected (Nl, N2) use different signaling protocols.

4. The method according to any one of the preceding claims, characterized in that the method comprises at the beginning the following step: - automatic detection of rules of the signaling protocol of the first network (Nl) and of rules of the signaling protocol of the second network (N2).

5. The method according to any one of the preceding claims, characterized in that the network is a mobile radio network, in particular according to the GSM (Global System Mobile) or DCS standard or ISDN network and is operated by a carrier, in particular a national carrier.

6. The method according to any one of the preceding claims, characterized in that the method uses a uniform intermediate protocol.

7. The method according to any one of the preceding claims, characterized in that the method connects networks (Nl, N2) of different carriers that use different signaling protocols in different countries.

8. The method according to any one of the preceding claims, characterized in that the signaling protocol relates to an out-of-band signaling, in particular the signaling system No. 7 (SS # 7).

9. The method according to any one of the preceding claims, characterized in that the method comprises a national network identifier (14, 14 ') and international network identifier (16, 16') which is intended to identify the signaling protocols.

10. switching system for controlling a connection establishment and clearing of individual system components, consisting of: several networks (Nl, N2), several roof systems, each represented by a head office (12), wherein a network is to be assigned to at least one roof system and the Networks (Nl, N2) can use different signaling protocols, and a gateway (10) as a central switching entity, with which at least some of the system components are connected, with:

a receiving unit for receiving signaling data of a first network (Nl) at a first interface of the gateway (10), the first interface corresponding to the protocol of the first network (Nl),

- a conversion unit for adapting the received signaling data to the requirements regarding the signaling of a second network (N2) and - a transmission unit for transmitting the adapted one

Signaling data via a second interface of the gateway (10) to the second network (N2).

11. System according to claim 10, characterized in that the network is a mobile radio network, in particular according to the GSM or DCS standard, and is operated by a carrier, in particular a national carrier.

12. System according to one of claims 10 or 11, characterized in that the signaling protocol is an out-of-band signaling, in particular signaling system No. 7 (SS # 7).

13. System according to any one of the preceding claims 10 to 12, characterized ge mark that each network (Nl, N2) and / or at least part of the head offices (12) is / are connected to the gateway (10).

14. System according to any one of the preceding claims 10 to 13, characterized in that the connection of the networks (Nl, N2) does not take place via the respective head offices (12) of the networks, but exclusively via the gateway (10).

15. System according to any one of the preceding claims 10 to 14, characterized ge marked that the adapted signaling data are supplemented with additional data relating to the respective countries, in particular by the data that would be provided by the respective head office (12) , such as a country code.

16. Protocol converter for converting signaling protocols from several networks (Nl, N2), comprising:

- several interfaces, each implementing a signaling protocol of a network,

- Means for converting the signaling protocols.

17. Computer-readable medium for storing computer software which, if loaded on a computer used as gateway (10), causes the latter to carry out the following steps:

- receiving signaling data of a first network (Nl) at a first interface of the gateway (10), the first interface corresponding to the protocol of the first network (Nl),

- Adapting the received signaling data to the requirements regarding the signaling of a second network (N2) and

- Transferring the adapted signaling data to the second network via a second interface of the gateway (10)

(N2).