KR100300845B1 - Method for checking no.7 siganl link in mobile communication system - Google Patents

Abstract

PURPOSE: A method for checking a No.7 signaling link in an MSC(Mobile Switching Center) is provided to set and access a path from an ASS-7(Access Switching Subsystem for No.7 signaling) time switch through an INS(Interconnection Network Subsystem) space switch to an ASS-T(Access Switching Subsystem for trunks) time switch and to keep the signaling links alive for long time, so that an operator can easily catch where a signaling link down state is generated. CONSTITUTION: If an operator inputs a test execution command(ST1), an MSC checks the state of an ASP(Access Switching Processor) according to the inputted command(ST2). Then the MSC checks a signaling link and a link set(ST3,ST4). After checks the signaling link and the link set, the MSC checks a time slot(ST5). After checking the time slot, the MSC judges whether a test type inputted by the operator is a test for an ASS-7 time switch, an INS space switch or an ASS-T time switch(ST6). The MSC tests the ASS-7 time switch, the INS space switch or the ASS-T time switch according to the inputted test type(ST7-ST9). Then the MSC outputs a test result(ST10).

Description

No.7 siganl link in mobile communication system

The present invention relates to a No.7 signal link of a mobile communication switch, and more particularly, to a time switch of an ASS-7 (Access Switching Subsystem for No.7 signaling, No.7 signal matching subsystem) as a local station signal point and a foreign station signal point. Set up and connect the route to the space switch of INS (Interconnection Network Subsystem) and the time switch of ASS-T (Access Switch Subsustem for trunks) to keep signal link alive for a long time. The present invention relates to a method for identifying the location where a signal link down phenomenon occurs and facilitating an operator to identify the cause.

In general, a mobile communication system is a system that enables communication while moving with a mobile terminal (mobile station).

1 is a block diagram of a general mobile communication switch.

As shown therein, the time switch 10 of the ASS-7 performs packet processing; A space switch 20 of the INS that connects the ASS-7 to the ASS-T, performs number translation, route control, centralized call processing, and functions as a network synchronizer; It is composed of a time switch 30 of the ASS-T is connected to the INS connected to the trunk line.

The signal link function (level 2) of the MTP (Message Transfer Part) level 1 to 3, which is part of the exchange in a communication network, involves the signaling of signal messages through one individual signal data link, and provides reliable communication between two signal points. For the delivery of signaling messages, the NAIL_UP_PASS test is required, which means that the signaling link assigned to the signaling point is alive.

Therefore, conventionally, NAIL_UP_TEAT is performed with one signal point. That is, a test was performed by setting one signal link from the ASS-7 time switch 10 to the ASS-T time switch 30.

However, since only one signal link is set, it does not live for a long time, and when the signal link is down, it is difficult to diagnose the cause of the failure because it does not know which part of the signal link has occurred.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to route a path to an ASS-7 time switch, an INS space switch, and an ASS-T time switch as a local signal point and a foreign signal point. It is designed to provide the method of checking the signal link of mobile communication switch which can set up and connect the signal link for a long time, identify the location where the signal link down phenomenon occurs during system operation, and facilitate the operator's reasoning access. have.

In order to achieve the above object, a number 7 signal link checking method of a mobile communication switch according to the present invention,

Receiving a test execution command by an operator; Checking a state of an access switching processor (ASP) according to the test execution command; Checking the state of the matched exchange processor and then checking the signal link and link set; Checking the signal links and the link set and then checking the timeslots; Checking the timeslot and then performing a test according to a test type input by an operator; The technical configuration is characterized in that the step of outputting the test results performed.

1 is a block diagram of a general mobile communication switch,

2 is a flowchart showing a method of checking a number 7 signal link of a mobile communication switch according to the present invention;

3 is a detailed flowchart illustrating an input part receiving step in FIG. 2;

4 is a detailed flowchart showing the ASP state checking step in FIG.

5 is a detailed flowchart showing the signal link and link set checking step in FIG.

6 is a detailed flowchart illustrating a time slot checking step in FIG. 2;

7 is a detailed flow chart showing the test step in FIG.

8 is a signal flow diagram showing the flow of a signal link checking method of the mobile communication switch according to FIG.

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

10: ASS-7 time switch 11, 32: TSIA

12, 31: TLIA 13: CMMA

20: INS space switch 30: ASS-T time switch

Hereinafter, an embodiment according to the technical concept of the method No. 7 signal link check of the present invention configured as described above will be described in detail.

2 is a flowchart showing a method for checking a number 7 signal link of a mobile communication switch according to the present invention.

As shown therein, a step of receiving a test execution command by an operator (ST1); Checking a state of a match exchange processor according to the test execution instruction (ST2); Checking the state of the matched exchange processor and then checking the signal link and link set (ST3) (ST4); Checking the signal link and the link set and then checking the timeslot (ST5); Checking the timeslot and then performing a test according to a test type input by an operator (ST6-ST9); In step ST10, the test result is output.

In the step ST1 of receiving a test execution command by the operator, as shown in FIG. 3, the operator receives a signal point by the operator and determines whether the signal point is a signal point to be tested by the operator ( ST11) (ST12); If the signal point is a signal point to be tested by the operator, calculating a station signal point and receiving a signal link code by the operator (ST13) (ST14); Receiving a signal link code by the operator and receiving and returning a test type by the operator (ST15); If the signal point is not the signal point that the operator wants to test, it outputs the result and ends the test (ST16).

Receiving a test type by the operator in the above (ST15), the test type by the operator is composed of the type of ASS-7 time switch 10, INS space switch 20 and ASS-T time switch 30 It features.

The step ST2 of checking the state of the matched exchange processor may include determining whether the state of the matched exchange processor is normal and whether the type to be tested meets a condition (ST21) (ST22); Obtaining and returning a number of the matching exchange processor to be tested if the matching exchange processor is normal and the type to be tested is satisfied; If the matched exchange processor is abnormal or not mounted, or if the type to be tested does not meet the condition, the result is outputted and terminated (ST24).

The step ST3 (ST4) of checking the signal link and the link set includes: starting the signal link and link set checking to determine whether a signal point and the corresponding signal link are allocated (ST31) (ST32); If the signal point and the corresponding signal link are allocated, determining whether the corresponding signal link is available (ST33); If the corresponding signal link is available, finding and returning the corresponding signal link using the received signal point and signal code (ST34); If the signal point and the corresponding signal link are not assigned or are allocated, the step is outputted and terminated if the corresponding signal link is not found (ST35).

The step ST5 of checking the timeslot includes the steps of starting a timeslot check to determine whether a signal point and a signal link code are assigned (ST41) (ST42); Obtaining and returning a corresponding time switch to which the signal point and the signal link code are assigned (ST43); If the signal point and the signal link code are not assigned, the result is outputted and terminated (ST44).

The performing of the test according to the test type input by the operator (ST6-ST9) may include: determining whether the received type is ASS-7, INS, or ASS-T (ST6); If the input type is ASS-7, testing the time switch 10 of ASS-7 (ST7); If the input type is INS, testing the spatial switch 20 of the INS (ST8); If the received type is ASS-T, step ST9 of testing the time switch 30 of the ASS-T.

In the step ST7 of testing the time switch 10 of the ASS-7, the signal link loop is set by setting a signal link in the ASS-7 time switch 10.

In the step ST8 of testing the space switch 20 of the INS, the signal link loop may be set by setting the signal link from the ASS-7 time switch 10 to the INS space switch 20.

In the step ST9 of testing the time switch 30 of the ASS-T, the signal link is set from the ASS-7 time switch 10 to the ASS-T time switch 30 through the INS space switch 20. Test the signal link loop.

In the step (ST6-ST9) of performing the test according to the test type input by the operator, the resource allocation is requested by using a mobile call system library (MSL) library function composed of pure software belonging to the ASS when the test starts. Step ST51; Requesting call setup if the resource allocation request is accepted (ST32); After requesting the call setup, a time switch is connected to set up the call and test the loop of the signal link (ST53).

In the above-mentioned step of requesting call setup (ST32), it is characterized by consisting of requesting the originating call setting and requesting the incoming call setting.

The operation of the method for checking the number 7 signal link of the mobile communication switch according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

The first step is to take the NAIL_UP_PATH command by the operator, make the corresponding signal link available, and inform the operator of the result.

Therefore, when receiving a test execution command by the operator (ST1), the operator receives a signal point by the operator, and determines whether the signal point is the signal point to be tested by the operator (ST11) (ST12), and the signal point is tested by the operator. If it is a signal point to be calculated, the station signal point is calculated and a signal link code by the operator is received (ST13) (ST14). After receiving the signal link code by the operator, it receives and returns a test type by the operator (ST15). At this time, the test type by the operator consists of a test type of the ASS-7 time switch 10, the INS space switch 20 and the ASS-T time switch 30. However, if the signal point is not the signal point that the operator wants to test, the result is output and the test ends (ST16).

Therefore, when checking the state of the matched exchange processor according to the test execution instruction of the operator (ST2), it is determined whether the state of the matched exchange processor is normal and whether the type to be tested is satisfied (ST21) (ST22). Here, the states of the matched exchange processor are normal, abnormal, and NOT EQUIP. Therefore, if the matching exchange processor is normal and the type to be tested is met, the number of matching exchange processors to be tested is obtained and returned. In this case, the types of matching exchange processors include Access Switching Subsystem for Subscriber Lines (ASS-S) and Access Switching Subsystem for Trunks (RS-T), which are relay line matching subsystems, and subs for signal processing. ASS-7 (Access Switching Subsystem for No.7 Signaling) system and ASS-M (Access Switching Subsystem for Mobile Subscriber) and VMS / FMS (Voice / Fax Mail System) ASS-VF (Access Switching Subsystem for VMS / FMS). If the matching exchange processor is abnormal or not mounted, or if the type to be tested does not meet the condition, the result is output and terminated (ST24).

After checking the state of the matching exchange processor, the signal link and link set are checked (ST3) (ST4). Here, the common line signaling method is a signaling method in which one channel transmits signal information related to multiplicity of a circuit, or other information such as used in a communication network, through a label message to a single channel. Or signal links between other nodes of the telecommunication network serviced by the system. Thus, a telecommunication network operating by common signaling consists of a large number of exchanges and processing nodes interconnected by transport links.

Therefore, the signal link and link set check are started to determine whether the signal point and the corresponding signal link are allocated (ST31) (ST32), and if the signal point and the corresponding signal link are allocated, it is determined whether the corresponding signal link is available. (ST33). Here, the signaling point refers to a node having a processing function of CCS (Common Channel Signaling) No. 7. Nodes that may be signaling points are, for example, switching centers, maintenance operations centers, network service control stations, signaling relay stations, and the like. The signaling link refers to a signal line (data, link) that connects signal stations to each other. When two or more signal links exist between two signal stations, the signal link is called a link set. Thus, if the corresponding signal link is available, the corresponding signal link is found and returned using the received signal point and signal code (ST34). In addition, even if the signal point and the corresponding signal link are not assigned or assigned, if the corresponding signal link is not available, the corresponding signal link is not found and the test is terminated (ST35).

After checking the signal link and link set, the time slot is checked (ST5). This starts the time slot check to determine whether the signal point and the signal link code are assigned (ST41) (ST42), obtains and returns the corresponding time switch to which the signal point and the signal link code are assigned (ST43), and the signal point. If the signal link code is not assigned, the result is output and the operation is terminated (ST44).

Here, a switch constituting the digital switch network includes a time switch for exchanging two timeslots on the same data stream and a space switch for exchanging the same timeslot on different data streams. Thus, the time switch performs a time slot interface (TSI) function for timeslots on the same data stream. For example, the time slots input to the time switch in the PCM (Pulse Code Modulation) highway are simply written sequentially to the Speech Memory by the counter and read out in a predetermined order by the control memory. The function is performed.

Then, the time slot is checked and the test is performed according to the test type input by the operator (ST6-ST9).

Therefore, first, whether the input type is ASS-7, INS, or ASS-T is determined, and a signal link is set as shown in FIG. 8 to perform a test (ST6). That is, if the input type is ASS-7, the signal link loop is tested by setting the signal link in the ASS-7 time switch 10 (ST7) (FIG. 8A). If the input type is INS, the ASS-7 time switch is set. The signal link loop is tested by setting the signal link from 10 to the INS space switch 20 (ST8) (FIG. 8B). If the input type is ASS-T, the INS-7 time switch 10 receives the INS space. The signal link loop is tested by setting the signal link to the ASS-T time switch 30 through the switch 20 (ST9) (Fig. 8C).

Accordingly, each test is performed as follows by the test type input by the operator (ST6 to ST9). That is, when the test is started, the resource allocation is requested using the MSL library function composed of pure software belonging to the ASS (ST51). When the resource allocation request is accepted, the call setup of the calling and incoming calls is requested (ST32).

At this time, all messages used in the call control procedure include two types of information elements, functional and stimulus. Both types of information elements may be used depending on the capabilities of the user terminal, respectively, and the exchange shall be able to accommodate both types. And among the signaling procedures between the user and the exchange required for basic call processing, it is divided into call setting, incoming call setting, and call release.

Here, in the originating setup, the circuit switched call processing procedure is started by receiving the setup message from the user side in the exchange of null. The exchange selects the available channel by referring to the channel identification in the setup message received from the user side.

In the incoming call setup, the originating exchange that detects a call request including a telephone number in a communication state from the originating terminal selects an empty line in the corresponding route to connect a call line to the counterpart terminal. At the same time, the selected line and the line from the originating terminal are connected, and at the same time, the connection of the call line is requested to the downstream station (the next-stage switching center, in this case, the relay switch). At this time, the requested address message IAM (Initial Address Message) is transmitted. The IAM message includes the selected line number and called party number. The exchange receiving the IAM, in the same way, selects and connects an empty line at the corresponding route and also sends an IAM message to the next succeeding station. In this manner, the call line connection is made using the IAM to the destination exchange (received signal station) in which the other terminal is located.

In addition, antidepressants are classified into antidepressants by a user and antidepressants by an exchanger. A conflict for a release request occurs when the exchange sends a Disconnect message with the same call reference at the same time and a Release message at the same time.

In this way, the call setup of the incoming call and the incoming call is requested, the time switch is connected to set up the call, and the loop of the signal link is tested as described with reference to FIG. 8 (ST53) (ST54).

The test result is output (ST10), and the path is established and connected to the ASS-7 time switch, the INS space switch, and the ASS-T time switch as the local station signal point and the other station signal point. This is to identify where link down occurs.

As described above, the method of checking the number 7 signal link of the mobile communication switch according to the present invention sets a path to the ASS-7 time switch, the INS space switch, and the ASS-T time switch as the local signal point and the other station signal point. By keeping the signal link alive for a long time and identifying the location where the signal link down phenomenon occurs during system operation, the operator can easily access the cause.

Claims (4)

In the method for checking the test item by analyzing the test result by the operator at the exchange of the mobile communication system, and checking the number.7 signal link corresponding to the determined test item, If the test item is a state check of the matching exchange processor (ASP), Determining whether the state of the matched exchange processor is normal and whether the type to be tested meets a condition; Calculating a number of the match exchange processor to be tested if the match exchange processor is normal and the type to be tested is met; And if the matched exchange processor is abnormal or not mounted, or if the type to be tested does not meet the conditions, outputting the result and ending the check to check the state of the matched exchange processor. 7 How to check the signal link. In the method for checking the test item by analyzing the test result by the operator at the exchange of the mobile communication system, and checking the number.7 signal link corresponding to the determined test item, If the test item is the signal link and link set check, Determining whether the signal point and the corresponding signal link are allocated; Determining whether the signal link is available if the signal point and the signal link are allocated; If the corresponding signal link is available, finding the corresponding signal link using the received signal point and signal code; Moving the signal point and the link set by performing a step of outputting and terminating the defective signal link if the signal point and the corresponding signal link are not assigned or the corresponding signal link is not available even if the signal link is not assigned. No.7 Signal link checking method. In the method for checking the test item by analyzing the test result by the operator at the exchange of the mobile communication system, and checking the number.7 signal link corresponding to the determined test item, If the test item is a timeslot check, Determining whether signal points and signal link codes are assigned; Calculating a number of a corresponding time switch to which the signal point and the signal link code are assigned; 7. The method of claim 9, wherein the time slot is checked by performing a step of outputting and terminating the result if the signal point and the signal link code are not assigned. In the method of checking the signal link by receiving the test execution command by the operator at the switchboard of the mobile communication system, the test item is analyzed and correspondingly according to the test type input by the operator. Determining the received test types (ASS-7, INS, ASS-T); If the determination result test type is ASS-7, setting a signal link in the ASS-7 time switch and testing the signal link loop; Setting a signal link from an ASS-7 time switch to an INS spatial switch and testing a signal link loop if the test result is INS; And if the test result is ASS-T, establishing a signal link from the ASS-7 time switch to the ASS-T time switch through the INS space switch and testing the signal link loop. No.7 Checking the Signal Link.

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