KR100307408B1 - Over load control method of No.7 message processing apparatus - Google Patents

Abstract

The present invention relates to a No.7 message processing apparatus for processing a No.7 message, wherein the SSP message according to the start of the state change and the last data according to the end of the state change for local state signal points and sub-systems are changed. An overload control method of a No.7 message processing device that enables the No.7 message processing device to reduce the load on the No.7 message processing device and stably manage the status of the No.7 message by broadcasting to a sub system. In case of receiving SSP message and SSA message about status change from power station in SCCP in the device, after updating the data in SCCP with this management message, check whether the timer for the specific power subsystem is running and the timer is running. If not, if the received management message is an SSP message, the local subsystem may indicate the unavailability state of the power subsystem. And a timer, the timer is driven, and if the timer is running, the timer is canceled and then the timer is driven again, and the timer for each subsystem of the power station in the SCCP in the No.7 message processing apparatus is restarted. When receiving the timeout message of the characterized in that the data in the last SCCP broadcast to the local subsystem and SMHP to complete the overload operation of the No.7 message processing device for the state change of the power subsystem.

Description

No.7 message processing apparatus {Over load control method of No.7 message processing apparatus}

The present invention relates to a No.7 message processing apparatus for processing No.7 messages of the ITU-T recommendation, comprising: a Sub System Prohibited (SSP) message and a status according to the start of a state change for a state change to a power station signal point and a subsystem; Broadcasting the last data according to the end of the change to the local sub system of its own country, thereby reducing the load on the No.7 message processing device and enabling stable management of the No.7 message status. .7 relates to an overload control method for a message processing apparatus;

In general, a signaling point (SP) refers to independent devices in a network that communicate using No. 7 signaling, and a signaling point code (SPC) is assigned to a signal point to identify the signal points. As a unique identification factor, devices that communicate using No. 7 signaling in a mobile communication system include a mobile services switching center (MSC), a home location register (HLR), and a control station. (Base Station Controller; BSC), Visitor Location Register (VLR), etc., which are assigned different unique signal point codes.

The signal point codes assigned to the signal points use 14 bits (bits) in the ITU-T Recommendation operating in Korea according to the rules of each communication network in the domestic or international network, and 14 in the CHINA Recommendation operating in China. Use bits and 24 bits at the same time.

The signal point code as described above is classified into an owner point code (OPC) indicating a local exchange and a destination point code (DPC) indicating all signal points except the own signal point according to the purpose of use. do.

On the other hand, the conventional No.7 message processing apparatus receives each signal point transmitted from the power station and a signal message according to the state change of the sub system, that is, a sub system allowed message (SSA) message and an SSP message, and each component block of the local subsystem. If the broadcast to the broadcast, each of the building blocks of the local subsystem updates the status for the power subsystem.

However, as described above, the No.7 message processing apparatus that receives a signal message according to the state change of the power station signal and the subsystem and broadcasts it to the local subsystem has a lot of signal traffic for the repeated state change of the power station signal and the subsystem. There is insufficient coping in the process.

In other words, whenever there is a repeating state of the signal point and the state change of the subsystem, the No.7 message processing apparatus must broadcast to each component block of the local subsystem, which causes an excessive load on the No.7 message processing apparatus. Accordingly, there was a problem that the entire network becomes unstable due to a fatal loss in call communication.

In addition, due to the ever-increasing number of local subsystems and No.7 signal points, there is a large amount of message transfer from the No.7 message processing apparatus to the corresponding local subsystem, resulting in an overload on the No.7 message processing apparatus.

In addition, when the No.7 management message is transmitted from the No.7 message processing device to the power station, the corresponding management message is transmitted to the power station through the SMHP via a specific signal link, thus causing a congestion of the No.7 management message, that is, the signal link. There is plenty of room for congestion.

Accordingly, the present invention has been made to solve the above problems, the object of which is to change the state of the power station and the subsystem in the No.7 message processing apparatus for processing the No.7 message of the ITU-T Recommendation By broadcasting the SSP message at the start of the state change and the last data at the end of the state change to the local sub-system of the local station, it reduces the load on the No.7 message processing device and distributes the No.7 management message sent to the large station. It is to provide an overload control method of the No.7 message processing apparatus that can stably manage the No.7 message by stably managing the state of the No.7 message by transmitting the signal link to prevent congestion.

1 is a block diagram of a No.7 message processing apparatus and a local subsystem to which an overload control method according to the present invention is applied;

2 is an operation flowchart showing an overload control method of a message processing apparatus No. 7 according to the present invention;

3A to 3E are diagrams comparing the number of status broadcasts to a local subsystem.

<Description of the symbols for the main parts of the drawings>

10: SMHP11: SCCP message processing block

12: MTP message processing block 20: No.7 message processing device

21: SCCP22: MTP

23: SCCP subsystem management block 30: local subsystem

The overload control method of the No.7 message processing apparatus of the present invention for achieving the above object is, when receiving the SSP message and the SSA message for the status change from the power station in the SCCP in the No.7 message processing apparatus SCCP as this management message After updating my data, check if the timer for the specific sub-system is running. If the timer is not running, if the received management message is an SSP message, then the status of the sub-system is not available. The timer is driven after broadcasting to the SMHP, and if the timer is running, the timer is canceled and the timer is restarted, and the timer time for each sub-system of the power is played by the SCCP in the message processing apparatus No.7. When receiving a Time Out Message, the data in the last SCCP is sent to the local subsystem and SMHP. It characterized in that the transmission will be completed to the overload operation of the No.7 message processing device for changing the status of a large country subsystem.

Hereinafter, an overload control method of a message processing apparatus No. 7 according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a No.7 message processing apparatus and a local sub-system to which an overload control method according to the present invention is applied, and distributes a management message of a signaling connection control part (SCCP) to a value from 0 to 15. SMCP (Signalling Message) that consists of SCCP message processing block 11 to transmit to the MTP (Message Transfer Part) message processing block 12 to process and transmit the management message of the MTP to the power station, performing a task requiring real-time processing Handling Processor (10) and a connection-oriented network service as well as a connection-oriented communication network service that transmits different types of information between circuit and non-line related signal information and telecommunications stations and special centers through a No.7 signal network. SCCP 21 provides additional functions to the MTP, and the called party requires intentional information from the user to be delivered to the MTP through the No.7 signaling network. MTP 22 that provides the function to be delivered, and the local subsystem 30 to manage the management message of the SCCP to the SCCP message processing block 11, the management message of MTP is the MTP message processing block ( 12) No.7 message processing device 20 composed of SCCP subsystem management blocks 23 respectively transmitting to 12), matching subscribers and relay lines, time switches, recording guidance devices, and VMS / FMS (Voice Mail Service / Fax) ASS (Access Switching Subsystem) -M (Manager) 31, ASS-T (Trunk) 32, ASS-S (Subscriber) 33, ASS- V / F (34), ASS-IWF (Inter Working Function) (35), VLR (36), etc., only the service that simply connects the line with the development of communication network configuration and the expansion of telephone distribution is greatly expanded Instead of expanding the demand for advanced services that pursue various value-added services It consists of a local subsystem 30 in its own country.

The overload control method according to the present invention in the message processing apparatus No. 7 configured as described above will be described with reference to the flowchart of FIG. 2.

In the SCCP 21 in the message processing apparatus of No. 7 of the present invention, a status change report of a signal point or a power subsystem is received from a power station or an MTP 22 in a domestic station. Check whether the control point is a station control point managed by the own station, if it is a management target signal point once again checks whether there is a sub-system in the signal point of the station, and if the sub-system is present to perform the overload control method according to the present invention.

In addition, even when receiving a state change report of the sub-system sub system, after confirming whether the management target signal point and the sub-system exist in the signal point managed by the current station, the overload control method according to the present invention is performed.

2, when a message is received at the SCCP 21 in the No. 7 message processing apparatus 20 (S1), this message is a management message such as an SSP message and an SSA message for status change from a large power station. Acknowledgment (S2) or check whether the timer timeout message for each subsystem of the power (S3).

Here, the SSP message is a SCCP management message that transmits a failure of a subsystem to the SCCP management unit such as an associated signaling point, and the SSA message is transmitted to inform the SCCP management unit, such as an associated signaling point, when a prohibited system is allowed. SCCP management message.

In the case of the management message such as the SSP message and the SSA message according to the state change of the subsystem received from the power station in step S2, after updating the data in the SCCP with this management message (S4), Check whether the timer is running (S5).

At this time, in the present invention, a timer is provided for each sub-system of a large country, and this timer is adjusted to cope with an optimum state change, and the driving time of the timer is temporarily 3 seconds.

Subsequently, if the timer for the specific power subsystem is not running in step S5, it is checked whether the power management subsystem is in an unusable state through whether the management message received in step S2 is an SSP message (S6). .

In step S6, if the management message is an SSP message and the sub-system is not available, the sub-system is broadcasted to the local sub-system 30 and the SMHP 10 (S7). Drive (S8).

If the timer for the particular power subsystem is being driven in step S5, the timer is canceled (S9) and the timer is driven again (S8).

On the other hand, if the timeout message of the timer for the particular power subsystem is received in step S3, the data in the last SCCP 21 is transmitted to the local subsystem 30 as a message indicating that the state change of the power subsystem is finished. Broadcasts to each component block and SMHP (10) to complete the overload operation of the No.7 message processing apparatus for changing the state of the sub-system (S10).

As described above, the present invention is a countermeasure against overload of the No.7 message processing apparatus, and is a processing scheme prepared by SCCP when the state of signal points and sub-systems are repeatedly available / disabled. Can be used to replace the overload.

In addition, the present invention sets a timer for each sub-system of the power station to perform only the operation for its own No. 7 message processing apparatus for the change within 3 seconds, and to perform the broadcasting operation for each local sub-system for the subsequent state change. Omitting it prevents the overload of No. 7 caused by excessive signal use and excessive timer use.

3A to 3E are diagrams comparing the number of status broadcasts to a local subsystem. As shown in (A), the state of the power subsystem is 18 for 5.5 seconds as shown in (B). When there is a conference change, conventionally, when there is a state change of a subsystem as shown in (c), a total of 18 broadcasts are broadcasted to each local subsystem and SMHP as shown in (d). Since the subsystem is in an unusable state, the first unavailable state is broadcasted, and after the state change is completed, the data in the SCCP is finally broadcasted.

In the present invention, in the message No.7 transmitted to the large station, in the case of the management message of the SCCP, the SCCP message processing block 11 distributes the values from 0 to 15 and transmits them to the large station. By processing in the MTP message processing block 12 and transmitting to a large power station, it is possible to prevent a congestion occurring in transmitting an excessive No. 7 message via a specific signal link.

As described above, the present invention processes the No. 7 message by broadcasting the SSP message according to the start of the state change and the last data according to the end of the state change to the local subsystem for the state change of the power signal point and the subsystem. It can reduce the load on the device and distribute the No.7 management messages to large stations to prevent the congestion of signal links. It is effective.

Claims (1)

In the overload control method in SCCP or MTP in the No.7 message processing device according to the state change of the power signal point and the subsystem, A first step of confirming whether the message received at the SCCP in the No.7 message processing apparatus is a management message for a state change from the large station or a timeout message of a timer for each subsystem of the large station; and confirming the first stage As a result, if the message is a management message for a state change from the power, the second step of checking whether the timer for the specific power subsystem is running after updating the data in the SCCP with this management message, and the result of confirming the second step. A third step of determining whether the management message received in the first step is an SSP message if the timer is not running; and a non-availability state of the counterpart subsystem when the management message is an SSP message in the third step. The fourth step of driving the timer after broadcasting to the sub-system and the SMHP, and as a result of the confirmation of the second step, the timer is running. A fifth step of canceling the timer and driving it; if the message is a timeout message of a timer for each sub-system of the country as a result of the confirmation of the first step, broadcast the data in the last SCCP to the local subsystem and the SMHP. Overload control method of a message processing apparatus No. 7, characterized in that the sixth step.