KR100616563B1 - Method for routing on multi signalling network in No.7 signalling system - Google Patents

Abstract

The present invention provides a routing method in multiple signaling networks in a No.7 signaling network system. The present invention relates to receiving a message in an SCCP, analyzing a destination address, and routing by a generic name. A first step of determining if a system exists; A second step of extracting the network indicator from a network indicator assignment table if a signaling point and a subsystem exist at the called party address in the first step; And a third step of extracting local and large signal point information corresponding to the network indicator after the second step, creating a primitive by allocating SLS and SIO, and making a message transmission request to the MTP. By assigning NI to each SCCP subsystem number in the signaling network, NI can be allocated when a message is sent to MTP, enabling reliable operation of multiple local signaling points and multiple signaling networks.

Description

Method for routing on multi signaling network in No.7 signaling system in No.7 signaling network system

1 is a block diagram of a typical No.7 signal network system,

2 is a schematic diagram showing the configuration of a called party address in the SCCP of FIG.

3 is a schematic diagram showing the configuration of the address of FIG.

4 is a schematic diagram showing a primitive configuration when requesting message transmission from SCCP of FIG. 1 to MTP;

5 is a flowchart illustrating a routing method in a signal network in a conventional No. 7 signal network system;

6 is a flowchart illustrating a routing method in multiple signal networks in a No. 7 signal network system according to the present invention;

FIG. 7 is a schematic diagram illustrating a table to which an NI for each subsystem used in FIG. 6 is allocated.

Explanation of symbols on the main parts of the drawings

10: MTP

20: SCCP

30: SCCP user part

The present invention relates to a routing method in a multiple signal network in a No.7 signaling system, and more particularly, to a subsystem number (SCCP) of a Signaling Connection Control Part (SCCP) in a No.7 signal network. By assigning NI (Network Indicator, Network Indicator) for each SSN and Sub-System Number, it allocates NI when requesting message transmission to MTP (Message Transfer Part, Message Transfer Part). The present invention relates to a routing method in multiple signaling networks in No. 7 signaling network system, which is suitable for achieving reliability.

In general, No.7 signaling, which is a common signal network, refers to a new common signal signaling standardized by ITU-T (International Telecommunications Union, Telecommunication, Telecommunication Standardization Sector). This is a series that follows the signaling method No. 4 to 6 of the telephone, but can be applied not only for telephone but also in data exchange.

1 is a block diagram of a general No. 7 signal network system.

Here, reference numeral 10 is an MTP (Message Transfer Part), 20 is an SCCP (Signaling Connection Control Part), and 30 is an SCCP user part.

Here, the MTP 10 performs communication by No. 7 signal network, and the No. 7 signaling system is a call unlike a conventional call method in which a call path and a signal path are used together. It is a common line signaling method in which a plurality of voice signals transmit and receive signal information through independent channels by completely separating a furnace and a signal.

A network using the No. 7 signaling method is called a No. 7 signaling network, and a signaling entity distinguished from the No. 7 signal network is called a signaling point. .

This signal point, as shown in Figure 1, MTP (10) level 1 to 3, SCCP 20, SCCP user unit 30 is to be made.

2 is a schematic diagram showing the configuration of a called party address in the SCCP of FIG.

Thus, the SCCP 20 of the No. 7 signal network configures the destination address as 'address display' and 'address' as shown in FIG.

3 is a schematic diagram showing the configuration of the address of FIG.

Thus, the address in the called party address of the SCCP 20 is composed of the called party signal point code, the subsystem number, and the overall name, and is described in the order of FIG. 3, and can be omitted for each. And whether omitted is recorded in the 'address display' of FIG.

The subsystem number (SSP) is defined in the SCCP 20, and is a number that can be distinguished according to the functions of the SCCP user unit 30 that goes up the SCCP 20. Thus, when the SCCP 20 receives a signaling message from the power station, the SCCP 20 can distribute the message to its own subsystem using the subsystem number SSP.

Signaling point code is a number defined to distinguish by signal point in No.7 signal network. Therefore, the routing of signal message is processed in No.7 signal network by using signal point code that is distinguished between signal points.

4 is a schematic diagram illustrating a primitive configuration when a message transmission request is performed from the SCCP of FIG. 1 to an MTP.

Thus, when the SCCP 20 performs a message transfer request to the MTP 10, it uses the MTP-Transfer-Request primitive.

MTP-Transfer-Request primitives include local signaling point information (OPC), origination point code (DPC), destination point code (DPC), destination link code (SLS), signaling link selection (SLS), and service information octets (SIO). Octet), user data, and the like.

The SIO includes an NI and a sub-service field. Here, NI indicates a network to which a signaling point belongs, and the subservice field indicates a message type of the MTP 10.

5 is a flowchart illustrating a routing method in a signal network in a conventional No. 7 signal network system.

As shown therein, if the SCCP 20 receives the message, analyzes the called party address, and then determines whether a signaling point and a subsystem exist at the called party address if routing by the general name (ST11 to ST14); If there is a signaling point and a subsystem at the called party address, setting the NI to National during subsystem routing (ST15); After the NI is configured, it extracts the own station and station signal point information, allocates SLS and SIO, creates an MTP-Transfer-Request primitive, and makes a message transfer request to the MTP 10 (ST17) (ST18).

The operation of the prior art configured as described above will be described in detail with reference to the accompanying drawings.

First, when the SCCP 20 receives a message transmission request from the SCCP user unit 30, the called party address is analyzed (ST11).

If the called party's address contains general name information and routing is requested as the general name (ST12), the general name is translated to obtain the called party's signaling point code and subsystem and network information (ST). Alternatively, if routing is requested as a subsystem, the signaling point code and the subsystem must be recorded in the destination address (ST14).

In both cases, the destination signaling point and subsystem shall be present in the SCCP signaling network.

If the destination address of the message requested from the SCCP user unit 30 is intact, the SCCP 20 records information corresponding to the MTP-Transfer-Request primitive in order to make a message transmission request to the MTP 10. .

If routing is required by the global title, the network information (NI) recorded in the global title translation information is used.

In addition, when routing is required to the subsystem, since only a National network has been used conventionally, NI becomes a National, and corresponding local signal point information brings information defined in the MTP 10. The power point information is also a signal point belonging to the national network, which corresponds to the signal point analyzed from the destination address (ST16).

SLS uses an existing SLS when a message requires flow control. Otherwise, the SLS is randomly assigned and used.

NI of SIO is set to National, and the subservice field is SCCP, so it is set to 3 (this is the value defined in the field of SIO subsystem, 3 means SCCP), and SCCP user part data is SCCP user part 30 Set data received from the server (ST17), and request message transmission to the MTP (10).

However, in the conventional technique, when there are multiple local signaling points and networks other than the national network in the No.7 SCCP signaling network, that is, in the case of multiple signaling networks, network information does not exist in the called party address received from the user part of the SCCP. If the SCCP user part requires routing as the generic name and the general name exists, the network information (NI) exists in the global title translation information, but if the routing is requested as a subsystem, the network information exists in the destination address of the SCCP user part. Since the SCCP cannot set up the signaling network, it is impossible to determine its own signaling point and its counterpart signal point, which makes it impossible to request message transmission to the MTP.

Therefore, if the local signaling point of the international network and the national network exists, and if the national signaling point corresponding to the international network and the national network exists in the same signaling point code, the destination address is not included in the destination address. Since only the signal point code exists, the SCCP cannot determine which network signal point is a power station, and thus there is a problem in that multiple signal networks cannot be operated smoothly.

Accordingly, the present invention has been proposed to solve the above-mentioned general problems, and an object of the present invention is to allocate NI when requesting message transmission to MTP by assigning NI to each subsystem number of SCCP in No. 7 signal network. Therefore, the present invention provides a routing method in multiple signaling networks in No.7 signaling network system which can achieve reliability in the operation of multiple local signaling points and multiple signaling networks.

In order to achieve the above object, a routing method in a multiple signal network in a No. 7 signal network system according to an embodiment of the present invention,

A first step of receiving a message at the SCCP, analyzing the called party address, and determining whether a signaling point and a subsystem exist at the called party address if routing by the global name; A second step of extracting the network indicator from a network indicator assignment table if a signaling point and a subsystem exist at the called party address in the first step; And after the second step, extracting the local and large signal point information corresponding to the network indicator, assigning SLS and SIO, creating a primitive, and requesting a message transmission to the MTP. It features.

Hereinafter, an embodiment according to the technical concept of the routing method in a multiple signal network in the present invention, No.7 signal network system will be described with reference to the accompanying drawings.

6 is a flowchart illustrating a routing method in multiple signal networks in a No. 7 signal network system according to the present invention.

As shown therein, the first step (ST21 to ST25) of receiving a message from the SCCP 20, analyzing the called party address, and then determining whether a signaling point and a subsystem exist at the called party address when routing by the general name. Wow; A second step (ST26 to ST28) of extracting the network indicator (NI) from a network indicator (NI) assignment table if a signaling point and a subsystem exist at the called party address in the first step; A third step (ST29) of extracting local and large signal point information corresponding to the network indicator NI after the second step, assigning SLS and SIO, creating a primitive, and requesting a message transmission to the MTP 10; It includes (ST30).

In the above, the network indicator NI is configured to include National and International network information and is allocated to a subsystem.

In the above, the network indicator NI includes National, International, Reserved for International, Local network information, and is allocated to a subsystem.

The operation of the routing method in the multiple signal network in the No. 7 signal network system according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First of all, the present invention intends to improve the reliability of the operation of multiple local signaling points and multiple signaling networks by allocating network indicators when a message transmission is requested from the SCCP 20 of the No. 7 signal network to the MTP 10. .

In the conventional system, only National (NI) has been used. However, when NI has different signal points, the NI cannot be allocated only by the destination address of the SCCP 20. That is, in the case of a multiple signal network, NI cannot be allocated only by the destination address of the SCCP 20.

Therefore, the present invention allocates NI for each subsystem number (SSN) to allocate NI when requesting message transmission to MTP.

FIG. 7 is a schematic diagram illustrating a table to which an NI for each subsystem used in FIG. 6 is allocated.

The network indicator NI is represented by National and International, but may be configured to include reserved for International and Local network information. Network indicators NI are then assigned to subsystems.

For example, in FIG. 7, the Home Location Register (HLR) is set to National at Subsystem Number 6, and the Residential Access Network Application Processor (RANAP) is set to International at Subsystem Number 142. The subsystem number 251 shows an example in which the base station subsystem application processor (BSSAP +) is set to national.

On the other hand, in Figure 6, first to create a table assigned to the NI for each subsystem to obtain the network information necessary for routing messages in the SCCP (20). Therefore, we assign NI to the subsystem defined in No.7 signaling network SCCP (20).

When the SCCP 20 receives the message forwarding request from the SCCP user unit 30, the destination address is first analyzed (ST21).

Subsequently, the SCCP 20 determines whether routing is performed by the global title (ST22).

Therefore, if the called party's address contains the general name information and the routing is requested as the general name, the general name is translated to obtain the called party's signaling point code and the subsystem and network information (ST) (ST23). Then, it extracts its own station and station signal point corresponding to NI, allocates SLS and SIO, creates an MTP-Transfer-Request primitive, and requests message transmission to MTP 10 (ST29) (ST30).

In the case where the SCCP 20 determines the routing by the general name, when routing is requested to the subsystem rather than the general name, the SCCP 20 determines whether the signaling point and the subsystem exist at the destination address. It is determined whether a network indicator (NI), which is network information, exists in the NI allocation table (ST25) (ST26).

If the signaling point and the subsystem do not exist in the destination address or the network indicator NI, which is the network information, does not exist in the NI allocation table for each subsystem, a message error is performed and execution is terminated (ST25) (ST27).

If routing is required as a subsystem, the signaling address code and the subsystem must be recorded in the called party address.

In this case, the NI for each subsystem gets network information (NI) corresponding to the subsystem from the allocated table. In either case, the destination signaling point and subsystem must be present in the SCCP signaling network.

If the destination address of the message requested from the SCCP user unit 30 is intact, the SCCP 20 records information corresponding to the MTP-Transfer-Request primitive in order to make a message transmission request to the MTP 10. .

When routing is required as a general name, network information (NI) recorded in the general name translation information is used.When routing is required as a subsystem, network information (NI) obtained from a table allocated by NI for each subsystem is used. It is used (ST28).

And when routing to the subsystem is required, when the NI for each subsystem uses the network information (NI) obtained from the allocated table, the corresponding local signal point information brings the information defined in the MTP (10), The point information is also a signal point belonging to the national network, which corresponds to the signal point analyzed from the destination address.

SLS uses an existing SLS when a message requires flow control. Otherwise, the SLS is randomly assigned and used.

NI of SIO is set to National, and the subservice field is SCCP, so it is set to 3 (this is the value defined in the field of SIO subsystem, 3 means SCCP), and SCCP user part data is SCCP user part 30 In step S29, the data received from the server is set.

The SCCP 20 makes a message transmission request to the MTP 10 (ST30).

As such, the present invention allocates NI for each SCCP subsystem number in the No.7 signal network and allocates NI when requesting message transmission to MTP.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, in the No.7 signaling network system according to the present invention, the routing method in the multiple signaling network is a multi-signal network in the No.7 signaling network SCCP, and if there are multiple local signaling points, NI is required for each subsystem. You will create an allocated table. Then, it receives the message from the SCCP user part, and if it is routing by the subsystem, allocates the NI corresponding to the subsystem in the subsystem-specific NI table and requests message delivery to the MTP to cope with multiple local signaling points and multiple signaling networks. By doing so, the reliability of the operation of the multi-local signaling point and the multi-signal network can be achieved.

Claims (3)

A first step of receiving a message at the SCCP, analyzing the called party address, and determining whether a signaling point and a subsystem exist at the called party address if routing by the global name; A second step of extracting the network indicator from a network indicator assignment table if a signaling point and a subsystem exist at the called party address in the first step; And a third step of extracting local and large signal point information corresponding to the network indicator after the second step, creating a primitive by allocating SLS and SIO, and requesting a message to be transmitted to the MTP. Routing method in multiple signal networks in No.7 signal network system. The method of claim 1, wherein the network indicator, A routing method in a multiple signaling network in a No.7 signaling network system, comprising national and international network information, and assigned to a subsystem. The method of claim 1, wherein the network indicator, A routing method for multiple signaling networks in a No.7 signaling network system, comprising national, international, reservation for international, and local network information, and assigned to a subsystem.

Images