KR20040025437A - Method For Transmitting Message Between Signaling Points In No.7 Signaling Network - Google Patents

Abstract

PURPOSE: A method for transmitting messages between signaling points in a No.7 signaling system is provided to enable a local user part of a self signaling point to receive a UPU(User Part Unavailable) message and to transmit a signaling message, depending on whether a remote user part is available, thereby improving reliability on the No.7 signaling system. CONSTITUTION: A remote message transfer part receives a signaling message generated by a local user part, transmits the signaling message to a remote user part, or generates an unavailable UPU message. The remote user part generates an unavailable UPU message, and transmits the unavailable UPU message to a local message transfer part(S401). The remote message transfer part monitors a status of the remote user part, generates an available UPU message if the remote user part is available, and transmits the available UPU message to the local message transfer part(S402). The local message transfer part receives the available UPU message, generates an available MTP(Message Transfer Part)-status primitive, transmits the available MTP-status primitive to the local user part, and enables the local user part to restart transmitting the signaling message(S403).

Description

Method for Transmitting Message Between Signaling Points In No.7 Signaling Network}

The present invention relates to a signal point-to-signal message transmission method in a number seven (No.7) signal network, and more particularly, in the No.7 signaling network, a local user part of a local signal point indicates a remote user part state of a power station signal point. The present invention relates to a method of transmitting a message point-to-signal message in a No.7 signal network that receives a UPU message and transmits a signal message according to whether or not the corresponding remote user unit is available.

In general, the No.7 signaling system, which is a common line signaling system standardized by the Telecommunication Standardization Section (ITU-T) of the International Telecommunication Union, provides various kinds of control for providing call connection between subscribers and various communication services or operating and managing communication networks. As a signal system for transmitting a signal, a network using the No. 7 signal system is called a No. 7 signal network.

Hereinafter, a general No. 7 signal network will be described with reference to FIG. 1.

1 is a schematic configuration diagram of a general No. 7 signal network.

In general, the No. 7 signaling network has a signaling end point (SEP) for sending or receiving a signaling message, and a signaling transfer point (STP) and a signaling point (SEP, STP) for transmitting the signaling message. Signaling links (SLs), which are logical information transmission paths, are connected. When signal point A is a signal end point (SEP) in FIG. 1, signal points B, C, D, and E are signal transfer points (STP). )

Hereinafter, a configuration for message transmission between signal points in the No. 7 signal network will be described with reference to FIG. 2.

2 is a block diagram for message transmission between signal points in No. 7 signal network.

In the No.7 signal network, the configuration for message transmission between signal points, for example, between signal point A and signal point D shown in Fig. 1, includes the local station signal point 10 (signal point A) and the power station signal point 20 (signal point). D), the local station signaling point 10 includes a local user part 11 and a local message transfer part 12, and the station signal point 2 Has a remote user part 21 and a remote message transfer part 22.

Here, the local user unit 11 and the remote user unit 12 are individually designed according to an application field such as telephone exchange and data exchange, and a telephone user part (TUP: Telephone User Part) for an telephone network and an ISDN. (Integrated Services Digital Network) includes ISDN User Part (ISUP) for Call Processing, Transaction Capability (TC) for answering inquiries between network service control stations, etc. The remote message transmitter 22 shares signal transmission control, error correction, and security measures for the signal network.

Hereinafter, a method of transmitting a signal point-to-signal message in a conventional No. 7 signal network applied to a configuration for transmitting a signal point-to-signal message in the No. 7 signal network of FIG. 2 will be described.

3 is a flowchart of a signal-to-signal message transmission procedure in a conventional No. 7 signal network.

First, the local user unit 11 of the local station signal point 10 generates a signal message to be transmitted to the remote user unit 21 of the country signal point 20 and transmits the signal message to the local message transmission unit 12 (S301). The local message transmitter 12 transmits the signal message to the remote message transmitter 22 of the power point 20 (S302).

Accordingly, when the remote user 21 is available, the remote message transmitter 22 transmits the signal message to the remote user 21 (S303), and the remote user 21 Causes the corresponding signal message to be distributed, on the other hand, if the remote user 21 is not available, after discarding the signal message, the user part unavailable indicates that the remote user 21 is not available. A message is generated and transmitted to the local message transmitter 12 (S304).

Accordingly, the local message transmitter 12 generates a Message Transfer Part (MTP) -Status primitive indicating that the remote user 21 is not available, and then sends the message to the local user 11. In step S305, the corresponding local user unit 11 stops generating a signal message to the remote user unit 12 or regenerates it after a predetermined time.

As described above, the local user portion 11 of the local signal point 10 can know that the remote user portion 21 of the large signal point 20 is not available through the UPU message and the MTP-state primitive. have. At this time, even if the remote user unit 21 is continuously unavailable, the local user unit 11 generates a signal message to the remote user unit 21 and transmits the signal through the local message transmission unit 12. When transmitted to the remote message transmitter 22, the corresponding signal message is discarded and transmission and reception of network management messages such as the UPU message and the MTP-status primitive are repeated.

By the way, in the conventional method of transmitting message between signal points in No.7 signaling network, it can be seen that the remote user part of the station signal point is not available because the local user part of the local signal point receives the MTP-status primitive. After that, even if the remote user part is available again, the remote user part cannot know that it is available, and when the signal message is transmitted to the remote user part again, the routing is performed regardless of the status of the remote user part, that is, whether or not it is available. When the remote user part is not available, as described above, the transmitted signal message is discarded, and transmission and reception of network management messages such as UPU messages and MTP-status primitives continue to occur, thereby degrading reliability of the signal network.

SUMMARY OF THE INVENTION An object of the present invention is to solve a problem as described above, and an object of the present invention is to provide a UPU message from a remote message transmitter to a local message transmitter and an MTP-state from the local message transmitter to the local user. Through the primitive, the status of the remote user part of the signal point of the power station is identified and the signal message is transmitted according to the availability of the remote user part, thereby reducing the discarding and unnecessary transmission and reception of the network management message, thereby improving the reliability and efficiency of the signal network. To improve.

1 is a schematic configuration diagram of a general No. 7 signal network.

2 is a block diagram for message transmission between signal points in the No.7 signal network.

3 is a flow chart of a signal point-to-signal message transmission procedure in a conventional No. 7 signal network.

4 is a flowchart illustrating a method of transmitting a message between signal points in a No. 7 signal network according to an embodiment of the present invention.

FIG. 5 is a flowchart illustrating a signal message transmission process according to availability of a remote user unit in FIG. 4. FIG.

6 is a flowchart illustrating a remote user unit state monitoring process in FIG. 4;

FIG. 7 is a flowchart illustrating a signal message transmission resumption process according to an available remote user unit in FIG. 4. FIG.

8 illustrates the structure of an available UPU message.

9 shows the structure of soluble MTP-state primitives.

Explanation of symbols on the main parts of the drawings

10: local station signal point 11: local user part

12: local message transmission unit 20: power signal point

21: remote user unit 22: remote message transmission unit

In order to solve the above object, in the number seven signal network of the present invention, the signal point-to-signal message transmission method detects the state of the remote user unit and transmits a signal message or an unusable UPU message according to the availability of the corresponding remote user unit. and; Monitoring a state of the remote user unit and transmitting an available UPU message when the remote user unit becomes available; Receiving the available UPU message and transmitting an available MTP-status primitive to resume transmission of the signal message to the remote user portion.

Here, the available UPU message and available MTP-state primitives are characterized by including a newly defined reason parameter that the remote user part is available.

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

First, the configuration of the No.7 signal network to which the method of transmitting the signal point to point signal in the No.7 signal network according to the embodiment of the present invention is the same as that of FIG. 2 is the same as that of FIG. 2, the following describes a method of transmitting a message between signal points in a signal network No. 7 according to an embodiment of the present invention.

Hereinafter, a method of transmitting message points between signal points in the No. 7 signal network according to an embodiment of the present invention will be described with reference to FIG. 4.

4 is a flowchart illustrating a method of transmitting a message between signal points in a No. 7 signal network according to an embodiment of the present invention.

First, the remote message transmitter 22 of the power station signal point 20 is a signal generated by the local user unit 11 of the host station signal point 10 from the local message transmitter 12 of the station signal point 10. After receiving the message, the status of the remote user unit 21 is determined, and the signal message is transmitted to the remote user unit 21 according to the availability of the remote user unit 21, or the remote user unit 21 is provided. ) Generates an unavailable UPU message including a reason parameter (Because) and transmits it to the local message transmitter 12 (S401).

The remote message transmission unit 22 monitors the state of the remote user unit 21, and if the remote user unit 21 becomes available, the remote message transmission unit 22 sets a newly defined reason parameter that the remote user unit 21 is available. An available UPU message is generated and transmitted to the local message transmitter 12 (S402).

Accordingly, the local message transmitter 12 receives the available UPU message, generates an available MTP-state primitive that includes a newly defined reason parameter that the remote user 21 is available, and then the local user part. In step S403, the local user unit 11 resumes signal message transmission.

Hereinafter, the signal message transmission process (S401) according to availability of the remote user unit 21 will be described with reference to FIG. 5.

FIG. 5 is a flowchart illustrating a signal message transmission process S401 according to whether the remote user 21 is available in FIG. 4.

First, the local user unit 11 of the local station signal point 10 generates a signal message to be transmitted to the remote user unit 21 of the country signal point 20, and then transmits the local message transmission unit of the local station signal point 10 ( 12) (S501).

Accordingly, the local message transmitter 12 receives the signal message (S502), and transmits the signal message to the remote message transmitter 22 of the power point 20 (S503).

Accordingly, after receiving the signal message (S504), the remote message transmission unit 22 grasps the state of the remote user unit 21 (S505), and whether the corresponding remote user unit 21 is available. It is determined (S506).

At this time, when the determination result (S506), the remote user unit 21 is available, the remote message transmitter 22 transmits the signal message to the corresponding remote user unit 21 (S507).

Accordingly, the remote user unit 21 receives the signal message (S508), and receives the signal message (S509).

On the other hand, when the determination result (S506), when the remote user 21 is not available, the remote message transmitter 22 discards the signal message (S510), the corresponding remote user 21 A non-available UPU message including a reason parameter that is unavailable is generated and transmitted to the local message transmitter 12 (S511).

Accordingly, after receiving the unusable UPU message (S512), the local message transmitter 12 generates an unavailable MTP-state primitive including the reason parameter that the remote user 21 is not available. The data is transmitted to the local user unit 11 (S513).

Accordingly, the local user unit 11 receives the MTP-state primitive (S514), stops generating a signal message to the remote user unit 12, or generates and transmits it again after a predetermined time (S515).

Hereinafter, the remote user unit 21 state monitoring process S402 will be described with reference to FIG. 6.

FIG. 6 is a flowchart showing a remote user unit 21 state monitoring process 402 in FIG.

First, the remote message transmission unit 22 monitors the state of the remote user unit 21 (S601), and determines whether the corresponding remote user unit 21 is available (S602).

At this time, when the determination result (S602), when the remote user unit 21 is available, the remote message transmitter 22 includes a newly defined reason parameter that the corresponding remote user unit 21 is available. An available UPU message is generated (S603).

The remote message transmitter 22 transmits the generated available UPU message to the local message transmitter 12 (S604).

On the other hand, when the determination result (S603), when the remote user unit 21 is not available, the remote message transmitter 22 monitors the state of the remote user unit 21 (S601). Return to to continue monitoring the status.

Hereinafter, a process of resuming signal message transmission (S403) according to the availability of the remote user unit 22 will be described with reference to FIG.

FIG. 7 is a flowchart illustrating a process of resuming signal message transmission (S403) according to the availability of the remote user unit 22 in FIG.

First, the local message transmitter 12 receives the available UPU message from the remote transmitter 22 (S701), and includes an available MTP that includes a newly defined reason parameter that the remote user 21 is available. Generate a state primitive (S702).

The local message transmitter 12 then transmits the generated available MTP-status primitive to the local user 11 (S703).

Accordingly, the local user unit 11 receives the available MTP-status primitive (S704), regenerates a signal message to be transmitted to the remote user unit 21, and transmits the signal message to the corresponding remote user unit 21 again. (S705).

Hereinafter, the available UPU message will be described with reference to FIG. 8.

8 is a diagram illustrating the structure of an available UPU message.

The available UPU message is a local message transmitter of the local signal point 10 so that the remote message transmitter 22 of the power station signal point 20 indicates that the remote user 21 of the power station signal point 20 is available. (12), the Label field, the heading code HO field, the heading code H1 field, the destination field, the spare field, the remote user part. It includes an ID field and an unavailability reason field.

Here, the label field is 32 bits, 14 bits originating point code (OPC: originating point code (20)), 14 bits destination signal point code (DPC: Destination Point Code) (local signal point (10)) and a 4-bit signal link selection number (SLS: Signaling Link Selection) value.

The heading code HO field is 4 bits and is coded with a 1010 value corresponding to a user part flow control (UCC), as shown in Table 1 below.

The heading code H1 field is 4 bits and is coded with a 0001 value corresponding to the UPU, as shown in Table 1 below.

Here, Table 1 shows the heading code assignment of the signaling network management message.

Message group HO H1 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 … 0000 CHM 0001 COO COA CBD CBA ECM 0010 ECO ECA FCM 0011 RCT TFC TFM 0100 TFP * TFR TFA RSM 0101 RST RSR MIM 0110 LIN LUN LIA LUA LID LFU LLT LRT TRM 0111 TRA DLM 1000 DLC CSS CNS CNP 1001 UFC 1010 UPU 1011 …

The destination field is 14 bits and coded with the sign value of the DPC associated with the message, here the power signal point 20.

The spare field is coded 00 by 2 bits.

The remote user part ID is 4 bits and coded as shown in Table 2 below.

Here, Table 2 shows coding of the remote user part ID.

beat D C B A 0 0 0 0 Spare 0 0 0 One Spare 0 0 One 0 Spare 0 0 One One SCCP 0 One 0 0 TUP 0 One 0 One ISUP 0 One One 0 DUP 0 One One One Spare One 0 0 0 MTP Testing User Part One 0 0 One Broadband ISDN User Part One 0 One 0 Satellite ISDN User Part One 0 One One ) to ) Spare One One One One )

The unavailability reason field is 4 bits, and as shown in Table 3 below, among the values defined in ITU-T Rec. Q.704, spare 0011 is “created as a management target and accessible to the user (accessible remote user). Define a new value with ")" and code it.

Here, Table 3 shows the coding of the above unavailability reasons.

beat D C B A 0 0 0 0 unknown 0 0 0 One unequipped remote user 0 0 One 0 inaccessible remote user 0 0 One One accessible remote user to Spare One One One One

The available MTP-state primitive is described below with reference to FIG.

9 shows the structure of soluble MTP-state primitives.

The available MTP-status primitive indicates that the local message transmitter 12 of the local station signaling point 10 that has received the available UPU message from the remote message transmitter 22 of the station signaling point 20 has a corresponding station signal point ( The remote user 21 of 20 transmits to the local user 11 to indicate that it is available, and includes a primitive field and a parameter field.

The primitive field consists of a Generic Name and a Specific Name, and corresponds to the "MTP-status" for the generic name and "Indication" for the display name.

The parameter field includes "Affected DPC Cause", and the "affected DPC reason" includes "signal congestion", "User Part Unavailability", and "user part unavailability". Known but not created for management (User Part Unavailability: unequipped remote user) "," User part unavailability: inaccessible remote user ", and" User part unavailability: unequipped remote user " It can have five values of "User Part Unavailability (accessible remote user)", where it has a value of "Created as a management object and accessible to the user".

In addition, the embodiment according to the present invention is not limited to the above-mentioned, and can be implemented by various alternatives, modifications, and changes within the scope apparent to those skilled in the art.

As described above, the present invention provides an available UPU message and an available MTP-state primitive by adding a newly defined reason for notifying when the unavailable remote user part is available again in managing the status of the remote user part in the No. 7 signal network. By notifying the local user unit, the local user unit knows and routes the correct state of the remote user unit, thereby minimizing discarding of signaling messages and transmission and reception of unnecessary network management messages, thereby improving the reliability and efficiency of the signal network.

Claims (8)

Identifying a state of the remote user unit and transmitting a signal message or an unusable UPU message according to whether the corresponding remote user unit is available; Monitoring a state of the remote user unit and transmitting an available UPU message when the remote user unit becomes available; And transmitting the available MTP-status primitive after receiving the available UPU message to resume transmission of the signal message to the remote user unit. The method of claim 1, The signal message transmission process according to the availability of the remote user unit, Determining the availability of the remote user unit by identifying a state of the remote user unit after receiving the signal message; If the remote user unit is not available, discarding the signal message and generating an unusable UPU message and transmitting it to the local message transmission unit; Generating the unavailable MTP-state primitive after receiving the unavailable UPU message, and transmitting the generated unusable MTP-state primitive to the local user unit to stop generating the signal message or regenerate it after a predetermined time; Method of transmitting message point between signal points in network. The method of claim 2, The signal message transmission process according to the availability of the remote user unit, And transmitting the signal message to the corresponding remote user unit if the remote user unit is available, and distributing the corresponding signal message. The method of claim 1, The remote user unit state monitoring process, Monitoring the status of the remote user section to determine whether the remote user section is available; Generating an available UPU message when the remote user portion becomes available; And transmitting the generated available UPU message to the local message transmitter. The method of claim 4, wherein The remote user unit state monitoring process, And returning to monitoring the state of the remote user unit when the remote user unit is not available. The method of claim 1, The signal message transmission resume process according to the available remote user unit, Receiving the available UPU message to generate an available MTP-state primitive; Sending the generated available MTP-status primitive to the local user portion; And regenerating the signal message and transmitting the signal message again to the remote user unit. The method of claim 1, The available UPU message is And a newly defined reason parameter of said remote user part being available. The method of claim 1, The soluble MTP-state primitive is And a newly defined reason parameter of said remote user part being available.