KR100475751B1 - Method for SCCP signal message distributing in No.7 signaling network - Google Patents

Abstract

The present invention relates to a SCCP signaling message distribution method in a No.7 signaling network that allows a SCCP user of the No.7 signaling network to dynamically manage how a SCCP signaling message is distributed.

Conventionally, since SCCP fixedly determines and uses the SCCP signaling message distribution method delivered to the SCCP user unit, there is a problem in that the dynamic operation state change of the SCCP user unit cannot be properly handled.

According to the present invention, the SCCP user part dynamically changes the SCCP signaling message distribution scheme, and delivers the changed information to the SCCP signaling network management unit, thereby appropriately distributing the SCCP signaling message according to various operation state change requests of the SCCP user part.

Description

Method for SCCP signal message distributing in No.7 signaling network

The present invention relates to a method for distributing SCCP signaling messages in No.7 signaling network, and more particularly to SCCP in No.7 signaling network that enables SCCP user of No.7 signaling network to dynamically manage how SCCP signaling messages are distributed. A method for distributing signal messages.

In general, the No.7 signaling system is different from the existing channel methods in which the channel and the signal channel are used together. It is a common signal system for transmitting and receiving signal information through one independent channel.

This No.7 signaling network uses Level 1 to Level 3 MTP (Message Transfer Part), which provides the function of reliably delivering the signaling message to the designated destination, and user part (TUP, ISDN-UP, Signaling Connection Control Part (SCCP), which provides a means of logical signal connection and signal data unit transmission to TC), and a higher layer function unit that provides services by directly interfacing with SCCP. It is divided into the general information communication network user unit and the SCCP user unit composed of the SCCP management unit.

As described above, the SCCP user unit is assigned a different SubSystem Number (hereinafter referred to as SSN) according to the function and service characteristics of the corresponding user unit. In the actual function implementation, a plurality of entities performing the function are provided. To distribute the service. That is, as shown in FIG. 1, one or more functional entities performing the same service exist in one subsystem.

On the other hand, SCCP signal messages can be divided into four types, as shown in Figures 2a to 2d, the first is a one-way message transmitted by the local user unit to the other user unit, as shown in Figure 2a, The second is a one-way message received by the local user part from the other station user part, as shown in FIG. 2B, and the third is the local user part transmits a message to the other station user part, as shown in FIG. 2C, and a response message thereto. Is a two-way message for receiving a message, and a fourth is a two-way message in which a local user part receives a message from another user part and transmits a response message thereto.

Here, in the second and fourth cases described above, as shown in FIG. 1, when two or more functional entities performing the same service exist in one subsystem, the problem of distributing a signaling message to which functional entity is a problem. As the SCCP user cannot specify how SCCP signaling messages are distributed, SCCP distributes SCCP signaling messages in a round-robin fashion to all functional entities with corresponding SSNs and specific functional entities. Only one of the methods of distributing the SCCP signaling message is fixedly distributed.

In this case, the first case is one-way transmission to another station, and the third one is a response message for one message transmission. Therefore, a problem due to message distribution does not occur because the functional entity that sent the message must receive the response message. Will not.

As described above, conventionally, SCCP fixedly determines and uses the SCCP signaling message distribution method delivered to the SCCP user part, so that the SCCP signaling message distribution method uses a round robin method to distribute messages during system operation. There is a problem in that it cannot be dynamically changed by distributing a message only or distributing a message in a round robin manner in a manner of distributing a message only to a specific functional entity.

Therefore, even if the SCCP user part cannot properly process the SCCP signaling message received for the purpose of operation / maintenance, the SCCP cannot be notified of this, and thus the dynamic operation status change of the SCCP user part cannot be properly handled. There is this.

The present invention has been made to solve the above problems, the SCCP user part of the No.7 signal network to dynamically change the SCCP signaling message distribution method, and transfer the changed to the SCCP signal network management unit, various operations of the SCCP user unit An object of the present invention is to provide a method for distributing SCCP signaling messages in a No.7 signaling network that can appropriately distribute SCCP signaling messages according to a state change request.

A feature of the present invention for achieving the above object is a function present in each subsystem based on an SCCP user part status request primitive received from an SCCP user part in a method of distributing an SCC signal message in a number seven signal network. Storing operating state information of the entity in a database; When the SCCP signaling message is received from the MTP, searching the database to determine whether a local subsystem to which the SCCP signaling message is delivered is available; Determining whether a function entity to which the SCCP signaling message is to be fixed is determined when the local subsystem is determined to be available; If it is determined that a function entity to which the SCCP signaling message is to be distributed is not fixed, determining whether a master function entity exists in the local subsystem by searching the database; Distributing the SCCP signaling message to the master functional entity and waiting for a new SCCP signaling message to be received when it is determined that the master functional entity exists.

Here, when it is determined that the master function entity does not exist, determining a slave function entity to which the SCCP signal message is to be distributed among the slave function entities; The method may further include distributing the SCCP signaling message to the determined slave function entity and waiting for a new SCCP signaling message to be received.

And, if it is determined that the local sub-system is not available, characterized in that it further comprises the step of discarding or returning the SCCP signaling message and waiting for the reception of a new SCCP signaling message.

If it is determined that the function entity to receive the SCCP signal message is fixed, the method further includes distributing the SCCP signal message to the fixed function entity and waiting for a new SCCP signal message to be received.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the SCCP signaling message distribution method in the No.7 signal network according to a preferred embodiment of the present invention.

Since the internal structure of the No.7 signal network to which the SCCP signaling message distribution method is applied in the No.7 signal network according to the present invention is similar to the conventional art, the following description will be given with reference to FIG. 1. There are three functional entities, X-1, X-2, and X-3, in SCCP user unit assigned to system number X to perform service X. SCCP user unit assigned to subsystem number Y to perform service Y. Assume that there are two functional entities, Y-1 and Y-2.

As described above, the functional entity that performs a specific service registers its serviceable state change to the SCCP signaling network manager through the SCCP user part state request primitive (N_STATE.request primitive), which is a SCCP primitive. , Table 1 shows the parameters of the SCCP user part status request primitive (N_STATE.request primitive) and SCCP user part status indication primitive (N-STATE.indication primitive) and the state of each parameter applied to the present invention.

parameter Primitive N_STATE request N_STATE indication Assigned subsystem Mandatory Mandatory User status Mandatory Mandatory Subsystem multiplicity indicator Not applicable Optional Operation mode Mandatory Not applicable

In Table 1, the 'assigned subsystem' parameter indicates the subsystem number assigned to the service provided by the functional entity, and the 'user state' parameter indicates whether the functional entity is in-service or not. -of-service), the 'subsystem multiplexing indication' parameter indicates whether the function entity is multiplexed, and the 'operation mode' parameter indicates the SCCP signaling message distribution operation type of the function entity.

As described above, the 'operation mode' parameter is divided into a master, a slave, and a reject. A functional entity in which the 'operation mode' is a master includes all SCCPs in which the functional entity is not fixed. The function entity processes the signaling message, the functional entity whose 'operation mode' is slave receives and processes only a portion of the SCCP signal message whose function entity is not fixed, and the functional entity whose 'operation mode' is reject The functional entity refuses to receive a SCCP signaling message that is not fixed.

As described above, the SCCP user unit uses the SCCP user unit state request primitive (N_STATE.request primitive) to communicate the change of its operation status to the SCCP signaling network management unit. 'Send it by specifying it in a parameter. The SCCP user part state request primitive may be used more than once in order to dynamically change only the 'operation mode' parameter.

On the other hand, the SCCP signaling network management unit stores the operating state information of the functional entities present in the corresponding subsystem in the database based on the SCCP user part state request primitive (N_STATE.request primitive) received from the SCCP user part. The new additional parameter 'operation mode' information is also stored for use in the distribution.

3 is a flowchart for explaining a SCCP signaling message distribution method in No. 7 signaling network according to the present invention.

First, when receiving the SCCP signal message from the MTP (S10), it is determined whether the connection type service message (S12). As a result of the determination in step S12, when the SCCP signaling message received in step S10 is a connection type service message, a connection type message distribution procedure for transferring the message is performed through a signal connection between preset SCCPs (S14), and a new SCCP signal is obtained. Wait for the message to be received.

Meanwhile, as a result of the determination of step S12, if the SCCP signal message received in step S10 is a connectionless service message, it is determined whether the called point of the received SCCP signal message is itself (S16).

If the destination point of the received SCCP signal message is not the result of the determination in step S16, the SCCP signal message received by the corresponding signal network is routed (S18), and a new SCCP signal message is waited to be received.

On the other hand, if the destination point of the received SCCP signal message as a result of the determination in step S16 it is determined whether the received SCCP signal message is the SCCP signal network management message (S20).

If the SCCP signaling message received as a result of the determination of step S20 is an SCCP signaling network management message, the SCCP signaling network management message is distributed to the SCCP signaling network management unit (S22), and a new SCCP signaling message is waited to be received.

On the other hand, if the received SCCP signaling message is not the SCCP signaling network management message as a result of the determination in step S20, it is determined whether the local sub-system performing a specific service is available by searching the database and receiving the received SCCP signaling message. (S24).

As a result of the determination of step S24, if the corresponding sub-system is not available, the received SCCP signal message is discarded or returned (S26), and the new SCCP signal message is waited to be received.

On the other hand, if the corresponding sub-system is available as a result of the determination of step S24, the function entity to receive the SCCP signal message received by determining the type according to the contents of the SCCP signal message received in step S10 is fixed. Determine whether (S28).

If the function entity to which the SCCP signal message received is fixed as a result of the determination of step S28, the SCCP signal message received by the corresponding function entity is distributed (S30), and a new SCCP signal message is received.

On the other hand, if the function entity to receive the SCCP signal message received as a result of the determination in step S28 is not fixed, the database is searched to determine whether a master function entity exists in the corresponding subsystem (S32).

If the master function entity exists as a result of the determination in step S32, the SCCP signal message received by the master function entity is distributed (S34), and a new SCCP signal message is received.

On the other hand, if the master function entity does not exist as a result of the determination in step S32, the slave function entity to receive the SCCP signal message received from the slave function entity is determined (S36). In step S36, when determining a slave function entity to receive the received SCCP signal message, the slave function entity to receive the SCCP signal message is determined such that the received SCCP signal message is distributed at the same rate by using a round robin method. . In addition, the SCCP signaling message is not distributed to the functional entity operating as a reject.

Thereafter, the SCCP signal message received by the slave function entity determined in step S36 is distributed (S38), and a new SCCP signal message is received.

The SCCP signaling message distribution method in the No. 7 signal network of the present invention is not limited to the above-described embodiments, and may be modified in various ways within the scope of the technical idea of the present invention.

According to the SCCP signaling message distribution method in the No.7 signaling network of the present invention as described above, the SCCP user section dynamically changes the SCCP signaling message distribution scheme, and delivers the changed information to the SCCP signaling network management unit. SCCP signaling messages can be appropriately distributed according to various operational state change demands.

1 is a view showing a general internal structure of the No. 7 signal network.

2A-2D illustrate a message delivery type.

3 is a flowchart for explaining a SCCP signaling message distribution method in No. 7 signaling network according to the present invention;

Claims (7)

In the method of distributing SCC signaling message in number seven signaling network, Storing operation state information of a functional entity present in each subsystem in a database based on an SCCP user part state request primitive received from the SCCP user part; When the SCCP signaling message is received from the MTP, searching the database to determine whether a local subsystem to which the SCCP signaling message is delivered is available; Determining whether a function entity to which the SCCP signaling message is to be fixed is determined when the local subsystem is determined to be available; If it is determined that a function entity to which the SCCP signaling message is to be distributed is not fixed, determining whether a master function entity exists in the local subsystem by searching the database; Distributing the SCCP signaling message to the master functional entity and waiting for receiving a new SCCP signaling message when it is determined that the master functional entity exists. Way. The method of claim 1, wherein if it is determined that the master functional entity does not exist, Determining a slave function entity to which the SCCP signaling message is distributed among slave function entities; And distributing the SCCP signal message to the determined slave function entity and waiting for a new SCCP signal message to be received. 3. The method of claim 2, wherein when determining a slave functional entity to receive the SCCP signaling message, And determining the slave function entity in a round robin manner such that the SCCP signaling message is distributed at the same rate. The method of claim 1, wherein if it is determined that the local subsystem is not available, And discarding or returning the SCCP signaling message and waiting for a new SCCP signaling message to be received. The method of claim 1, wherein when it is determined that a functional entity to which the SCCP signaling message is to be distributed is fixed, And distributing the SCCP signaling message to a fixed functional entity and waiting for the reception of a new SCCP signaling message. The method of claim 1, wherein the SCCP user part state request primitive is: An 'assigned subsystem' parameter indicating a subsystem number assigned to a service provided by the functional entity; A 'user state' parameter indicating whether the functional entity is available or unavailable; SCC signal message distribution method in a number seven signal network, characterized in that it comprises a 'operation mode' parameter indicating the SCCP signal message distribution operation type of the functional entity. The method of claim 6, wherein the 'operation mode' A master for processing all of the SCCP signaling messages for which the functional entity is not fixed; A slave that receives and processes only a part of an SCCP signaling message whose function entity is not fixed; Method for distributing SCC signaling in a number seven signaling network, characterized in that the functional entity is divided into a refusal to refuse receiving SCCP signaling.