KR20100059058A

KR20100059058A - Signaling method using local signaling point code in signaling system no.7

Info

Publication number: KR20100059058A
Application number: KR1020080117697A
Authority: KR
Inventors: 임성혁
Original assignee: 서울통신기술 주식회사
Priority date: 2008-11-25
Filing date: 2008-11-25
Publication date: 2010-06-04

Abstract

PURPOSE: A signal processing method using a local signal point is provided, which prevents shortage of the authorization SP. CONSTITUTION: An SP(Signaling Point) connected to a local network gives a furnace curl SP to a private switching system connected to the local network(S320). The local network performs the transmission of data by a furnace curl SP(S330). The local network comprises a public network and a plurality of private exchange devices connected with the SP. The SP uses an SSF(Subservice Field) value of an SIO(Service Information Octet) of a No7 protocol message.

Description

Signaling method using local signaling point in No.7 method [Signaling method using local signaling point code in signaling system NO.7}

The present invention relates to a signal processing method using a signal point in a common line signal processing method, and more particularly, by using a local signal point in a local network connected to a public network to process a limited public signal point method as it is. It relates to a signal point processing method that can bring an effect of increasing the signal point while using.

The number seven method is a signal processing method that improves the speed of signal processing and signal processing capability by separating a line of data and a line processing a signal by a common line signal method. Prior to the number seven method, since the data line and the signal processing line were the same, a long time was required for signal processing and the amount of signal processing was limited.

The number seven scheme was designed to provide a specific service in the 1980s voice network, and is a protocol for exchanging information between network elements. The primary function of the number seven approach is to provide transactional capabilities for fast call setup and remote database reference operations. The number seven method uses an out-of-band method to support call establishment, billing, and call routing. OOB signaling refers to a method of providing and maintaining a signal processing procedure by separating a signal processing line from a data processing line as described above. Here, signaling refers to information that is necessary for using a dial tone, pressing a telephone number, a call waiting signal, and using a voice mailbox.

The clover (Toll-free service starts with 080) service uses the Number Seven method for mapping the 080 number to the actual telephone number and for signaling between the circuit provider's switching center and the service control station to ensure that calls are routed correctly. . Number Seven signaling is important not only in voice networks today, but also in applications such as call routing, area code portability, prepaid and postpaid calling cards. In addition, in IP phones, additional services provided by number-based signaling are important.

This protocol standard for common line signal processing is referred to briefly as number seven (Signing System Number 7) or SS No. 7 or SS7.

That is, the number seven method is a protocol for integrally managing only signal processing such as call information of voice communication and connection information of data communication. The recent number seven method manages not only the meta information of the voice communication call but also the meta information of both the voice communication and the data communication. Accordingly, by using the number seven signaling protocol, various intelligent network systems can be developed based on the integrated environment of voice communication and data communication.

However, in the number seven method, a signaling point code is used as a method for recognizing exchange equipments forming a network, and the number of signal points is limited. In Korea, the number is limited to 14 wins of 2 and the international case is limited to 24 wins of 2. Therefore, in Korea, due to the increase in private exchange equipment, signal points that can be allocated to private exchange equipment are being depleted.

An object of the present invention is to provide a method for solving the problem of lack of authorized signal point by using a local signal point in the local network when the local network is configured to solve the conventional problems.

In addition, an object of the present invention is to provide a method for solving the above problems and a method that is relatively simple to implement and low additional development cost.

Other objects of the present invention will be readily understood through the following description of the embodiments.

According to an aspect of the present invention, in a signal point processing method of a local network of No. 7 method, the local network is connected to the local network at a signaling point (SP) connected to the local network. Assigning the local signal point to a private exchange device; And the local network is provided with a local network signal point processing method of the number seven (NO.7) method comprising the step of transmitting data by the local signal point.

Here, the step of assigning the local signal point at the signaling point may be characterized by using an SSF (Subservice Field) value of the Service Information Octet (SIO) of the number seven protocol message.

Here, when the value of the SSF (Subservice Field) has a local value, the local signal point may be characterized.

The local signal point may be assigned at MTP (Message Transfer Part) level 3 of the number seven protocol.

The method may further include determining a routing direction of data at a signaling point (SP) connecting a public network and a local network; And changing to a local signal point in the case of local network routing as a result of the determination and routing to a public signal point in the case of public network routing as a result of the determination. A signal point processing method of is provided.

Here, the method of changing to the local signal point and the authorized signal point may be characterized by changing the value of the SSF (Subservice Field) of the service information octet (SIO) of the message of the number seven protocol.

Herein, the local signal point sets the SSF (Subservice Field) value to a local value of binary value 11, and the authorized signal point sets the SSF (Subservice Field) value to a binary value of 10 or a binary value of an international value. It may be characterized by setting to 00.

The local signal point and the authorized signal point may be set at the message transfer part (MTP) level 3 of the number seven protocol.

According to the present invention, by providing a local signal point to the private switching equipment constituting the local network, there is an effect of preventing the shortage of authorized signal points due to the increase in private switching equipment,

In addition, in the local network, since the same number of signal points as the authorized signal point can be given, the authorized signal point is increased.

In addition, the implementation method of the present invention has a relatively simple advantage that can be applied to the system currently in operation without additional development burden.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

Prior to the description of the present invention, it is intended to summarize the simple terms used in the present invention.

A public network is a network through which signals are transmitted using public signaling points, and the local network consists of private switching equipment connected to any signaling point (SP-SP or less) of the public network. Speak network. In other words, the local network refers to a private network connected to one SP.

Here, SP is divided into signaling point codes and refers to exchange equipment that plays a role of exchanging signals.

In the number seven method, there are three types of SP.

1. SCP (Service Control Point) is the most essential element of the intelligent network, and plays a role in overseeing the whole process of intelligent network service processing. In other words, it is a database management system that centralizes network intelligence, and is in charge of service control at the network level, network configuration information, and subscriber information service control.

2. A Signal Transfer Point (STP) is a packet switch that routes network traffic between each SP. STP routes each message to the external signaling link according to the routing information contained in the SS7 message. By acting as a network hub, reducing direct connections between SPs, STP makes SS7 networks more efficient.

3. Service Switching Point (SSP) is a switch that starts and ends a call. The SSP completes a call by setting up, managing, and releasing a voice line by sending a signaling message to another SSP. The SSP can also send a query message to the central SCP, asking which way to route the call.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a local network connected to a public network as an embodiment of the present invention.

Referring to FIG. 1, private automatic branch eXchange (PABX) 200 and 201 are connected to an authorized network 10 composed of STPs 100, 101, and 102 and one STP 100. The local network 20 is configured as is connected.

In the present invention, the signaling point used in the public network and the local network (signaling point code) is used to distinguish the public signal point and the local signal point, respectively. In other words, the public signaling point used in the public network is represented by a binary value of 10 representing the SSF (Subservice Field) value of the SIO (Service Information Octet) of the message of the number seven protocol. The local signaling point used in the local network is represented by the binary value 11 of the SSF (Subservice Field) value of the SIO (Service Information Octet) of the message of the number seven protocol.

Therefore, it is possible to distinguish whether a signaling point code used in a public network or a signaling point code used in a local network according to a value of a subservice field (SSF) of a service information octet (SIO).

The other signaling point addressing system has the same addressing system of the authorized signaling point and the local signaling point. Therefore, the local network can use as many local signal points as the number of signal points used in the public network.

2 is a diagram illustrating a method of transmitting a signal by dividing a signal point according to an authorized network and a local network according to an embodiment of the present invention.

When data arrives at the STP 100 connecting the public network and the local network, the data transfer direction is determined (S210). In the case of the data transmitted to the authorized network as a result of the determination, the step of changing the signal point to the authorized signal point is performed (S220). As described in FIG. 1, the SSF (Subservice Field) value of the SIO (Service Information Octet) is set to a binary value of 10 in the domestic case and a binary value of 00 in the overseas case. In addition, the DPC (Destination Point Code) and OPC (Originating Point Code) of the Signaling Information Field (SIF) including routing label information of other signaling points may be set according to the routing table of the authorized network.

After that, in step S230, data is routed according to the authorized signal point in the authorized network.

In addition, in the case where the determination result data is transferred to the local network in step S210, the signal point of the data is changed to the local signal point (S240). In the method of changing to a local signal point, as described with reference to FIG. 1, the SSF (Subservice Field) value of the SIO (Service Information Octet) is set to a binary value 11 representing a local signal point. In addition, the destination point code (DPC) and the originating point code (OPC) of the signaling information field (SIF) including routing label information of other signaling points may be set according to a routing table of a local network.

Thereafter, in step S250, data is routed according to a local signaling point.

3 is a diagram illustrating a process of transferring data from a local network to a public network as an embodiment of the present invention.

Private Automatic Branch eXchange (PABX) 200 refers to a private exchange device connected to a local network. STP (Signal Transfer Point) 100 refers to the exchange equipment constituting the public network connecting the local network and the public network. STP (Signal Transfer Point) 101 means the exchange equipment constituting the authorized network.

In FIG. 3, it is assumed that data is transmitted from a subscriber connected to the PABX 200 in the local network to a subscriber connected to the STP 101 of the authorized network.

In the step S310, when the data is transmitted in the local network, the data is transmitted to the STP 100, which is a higher level switching device, because the destination of the transmitted data is not in the local network.

In step S320, when data is transmitted from the local network to the STP 100, the routing direction of the transmitted data is determined, and as a result of the determination, the data is transmitted to the authorized network, thereby changing the local signal point of the data to the authorized signal point. The data is routed to the destination by changing the SSF (Subservice Field) value of the Service Information Octet (SIO), which represents an authorized signaling point, to binary 10. That is, in step S320, the data changed to the authorized signal point is routed to the STP 101 to which the destination belongs by looking at the destination routing information of the data. Since data routing in the public network can use the same method as the conventional method, a detailed description thereof will be omitted.

Step S330 is a step in which the data changed to the authorized signal point is delivered to the STP 101 to which the destination subscriber is connected. The data can be broadcast to STPs 101 and 102 in the public network, and each STP 101 and 102 analyzes the broadcasted data and takes the data if it belongs to itself and passes it if it is not. Alternatively, if the signal point value of the STP 101 is A, the routing point of the data is viewed by the STP 100 connected to the local network, and the signal point is changed to the signal point value A of the STP 101 to which the data destination belongs. Data may be routed to the STP 101.

4 is a diagram illustrating a process of transferring data from a public network to a local network as an embodiment of the present invention.

In FIG. 4, it will be described on the assumption that data is transmitted from a subscriber connected to the STP 101 of the authorized network to a subscriber connected to the PABX 200 in the local network.

In step S410, when the data is transmitted from the authorized network, the data is transmitted to the STP 100, which is an exchange device, because the destination of the transmitted data is not in the authorized network.

In step S420, when data is transmitted from the authorized network to the STP 100, the routing direction of the transmitted data is determined, and as a result of the determination, the data is transmitted to the local network so that the authorized signal point of the data is changed to the local signal point. In operation S420, the signal routing point of the data is changed to the signal point of the PABX 200 to which the destination belongs, by looking at the routing data destination. For example, if the signal point of the destination PABX 200 of the data is B (where B means an arbitrary local signal point value), the data is a subservice field (SSF) of a service information octet (SIO), which means a local signal point. The value is changed to binary 11 and the destination point code (DPC) of the signaling information field (SIF) is changed to B, which is a signal point value of the PABX 200. Alternatively, the data changed to the local signal point may be broadcasted into the local network, and the PABX 200 may analyze the data to be broadcast and take data when the data belongs to itself. Obviously, the above two cases may differ depending on the configuration method of the routing table of the STP 100. The data formats of the local signal point and the authorized signal point will be described with reference to FIG. 5.

In step S430, the data changed to the local signal point is delivered to the PABX 200 to which the destination subscriber is connected. That is, data is routed to the PABX 200 having the changed signal point value B as the address B. Alternatively, the PABX 200 may analyze the broadcasted data and take data when the data belongs to itself.

5 is a diagram showing the structure of a number seven type message signal unit.

The structure of the number seven type MSU (Message Signal Unit) has the following information.

The flag marks the start of a new signal unit and the end of the preceding signal unit.

The backward sequence number (BSN) is used to inform the reception of a signal unit by a remote signaling point. In other words, BSN means the sequence number of a known signal unit.

The BIB (Backward Indicator Bit) is used to indicate negative recognition by the remote signaling point when toggled.

The Forward Sequence Number (FSN) contains the sequence number of the signal unit.

The Forward Indicator Bit (FIB) is used for error recovery like BIB.

Length indicator (LI) is used to determine signal unit type.

The SIO (Service Information Octet) consists of a subservice field indicating a network indicator in the MSU, a message priority, and a 4-bit service indicator.

Among these, a subservice field serving as a network indicator is used to distinguish between a local signal point and an authorized signal point in the present invention. That is, if the value of the subservice field is binary 00, it means international MSU. If the subservice field is binary 10, it means national MSU. If the value of the subservice field as above is binary 00 or 10, it means the authorized signaling point used in the public network. In the present invention, when the value of the subservice field is binary 11, it is defined as a local signal point used in the local network. That is, in the public network, the value of the subservice field must be 00 or 10, which means the public signaling point, and in the local network, the value of the subservice field must use 11, which means the local signaling point. In the number seven method, changing a value of a subservice field into a public signal point value and a local signal point value is performed by a message transfer part (MTP) of a protocol. In other words, the message received from the physical layer is analyzed in the MTP (Message Transfer Part), and changed to an authorized signaling point or a local signaling point and handed over to the ISUP (ISDN User Part).

Signaling Information Field (SIF) has routing label and signaling information (eg SCCP, TCAP, ISUP message data). The structure and function of the SIF will be described in FIG.

Cyclic Redundancy Check (CRC) is used to check and correct data transmission errors.

FIG. 6 is a diagram illustrating a Signaling Information Field (SIF) structure of the number seven type message signal unit. FIG.

Signaling Information Field (SIF) includes signal point information and has a different structure according to the type of message signal unit (MSU).

MSU (Message Signal Unit) has different SIF (Signaling Information Field) structure according to ANSI type and ITU-T type.

FIG. 6A illustrates an ANSI type SIF structure and FIG. 6B illustrates an ITU-T type SIF structure.

The ANSI type consists of 7 bytes of routing labels, and the ITU-T type consists of 4 bytes. Here, DPC (Destination Point Code) means the signal point of the destination and OPC (Origination Point Code) means the signal point of the source. Signaling Link Selection (SLS) is used to select an external link, ensuring the ordering of messages and allowing the same load sharing of traffic among all possible links.

Since ITU-T type MSU is used in Korea, the number of signal points that can be used in Korea is 14 powers of 2.

The number of signal points is 2 to 24 powers because ANSI type MSU is used in foreign countries (such as USA).

Therefore, in Korea, the signal points can only be used in 14 of a total of 2, so in the present environment where the network environment is developing and the increase of private exchange equipment is accelerating, the signal points are insufficient. In the present invention, in the local network connected to the public network and configured as Private Automatic Branch eXchange (PABX), as described above, by using the local signal point, the local network may have 14 signal points of 2 equal to those of the public network. Overcome weaknesses in signal points.

Although the above has been described with reference to embodiments of the present invention, those skilled in the art may variously modify the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. And can be changed.

10; Certified network

20: local network

100: STP (Signal Transfer Point)

200: Private Automatic Branch eXchange (PABX)

Claims

In the signal point processing method of the local network of the number seven (NO.7) method,

Assigning the local signal point to a private switching device connected to the local network at a signaling point (SP) connected to the local network; And

The local network includes a step of transmitting data by the local signal point, wherein the local network is a communication network composed of private switching equipment connected by the authorized network and the signaling point (SP). A local network signal point processing method according to No. 7 method characterized by the above-mentioned.

The method of claim 1,

The step of assigning the local signaling point at the signaling point is a local network signal point of the No. 7 method, characterized in that it uses a Subservice Field (SSF) value of the Service Information Octet (SIO) of the number seven protocol message. Treatment method.

The method of claim 2,

And a local signal point when the value of the SSF (Subservice Field) has a local value.

The method according to claim 1, wherein

The local signal point processing method according to the number seven (NO.7) method, characterized in that the local signal point is assigned in the MTP (Message Transfer Part) of the number seven protocol.

The method of claim 1,

And the local signal point is used only in the local network.

Determining a routing direction of data at a signaling point (SP) connecting the authorized network and the local network;

In the case of the local network routing as a result of the determination, change to a local signal point, and in the case of the public network routing as a result of the determination, change to the authorized signal point to perform routing by the number seven (NO.7) method. Signal point processing method.

The method of claim 6,

The method of changing to the local signal point and the authorized signal point is a number seven (NO.7) type signal, characterized in that for changing the SSF (Subservice Field) value of the SIO (Service Information Octet) of the message of the number seven protocol Point treatment method.

The method of claim 7, wherein

The local signal point sets the SSF (Subservice Field) value to a local value of binary value 11, and the authorized signal point sets the SSF (Subservice Field) value to a binary value of 10 or a binary value 00 of international value. A signal point processing method according to the number seven (NO.7) method, characterized by setting.

The method of claim 8,

The signal point processing method according to the number seven (NO.7) method, wherein the local signal point and the authorized signal point are set in a message transfer part (MTP) of the number seven protocol.