KR0173213B1 - Transit relay call testing method by network node interface link looping in single atm mode virtual channel switching system - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

Test Method for Passing Relay Call in Asynchronous Transfer Mode Virtual Channel Switching System

2. The technical problem to be solved by the invention

It is intended to provide a transit relay test method that can test pass relay by generating a pass relay that can occur when at least 3 exchange systems are installed in one exchange system using NNI link looping.

3. Summary of Solution to Invention

After setting up the exchange to be tested, and looping the two NNI links to be tested by cables, the message transfer processing block modifies the routing header of the broadband supplicant network user part (BISUP) message to be sent to the signal link. The transmitted BISUP message is received again through the signal link, and in the incoming / outgoing call and the pass through call processing block, the values of the virtual path identifier (VPI) and the virtual path connection identifier (VPCI) for each route are the same. This is done by attempting a relay call.

4. Important uses of the invention

Used to test pass-through calls using one asynchronous transfer mode switching system.

Description

Test of pass relay call by network node matching (NNI) link looping in single asynchronous delivery mode virtual channel switching system

The present invention relates to a test method for a pass through call by network node interface (NNI) link looping in a single Asynchronous Transfer Mode (ATM) virtual channel (VC) virtual switching system. This test method is to test the pass-through call by generating the pass-through call that can be generated when 3 or more switching systems are used in one ATM VC switch system using NNI link looping.

The pass relay call is a call type that is relayed from the originating exchange system to the relay exchange system (test target exchange system) and is relayed to the destination exchange system again.At least 3 pass relay calls are tested in the conventional test method. The above exchange system (outgoing exchange system, relay exchange system, incoming exchange system) is required.

The conventional pass-through call test method as described above is not economical because a large number of exchange systems must be installed, there are problems in maintenance and management, and there are complex problems because three exchange systems must be operated in actual test.

Accordingly, the present invention provides a pass-through call test method capable of testing pass-through call by generating a pass-through call that can occur when at least three exchange systems are installed in one exchange system using NNI link looping. The purpose is.

1 is a block diagram of a pass-through call test apparatus of the ATM VC exchange system to which the present invention is applied.

2 is a processing flowchart of a test for passing relay call according to the present invention.

* Explanation of symbols for main parts of the drawings

1: subscriber call processing unit 2: message delivery unit processing unit

3: station number and routing processing unit 4: outgoing call processing unit

5: pass-through call processing unit 6: incoming call processing unit

In order to achieve the above object, the present invention sets up an ATM VC switching system to be tested, forms a loop with two NNI links to be tested, and then a message transfer unit processing unit transmits a signal link to the user equipment of the broadband integrated information network. (BISUP: B-ISDN User Part) Modify the routing header of the message so that the transmitted BISUP message is received again through the signal link, and the station number and routing processing unit sets the station number for the occurrence of the outgoing call, and loops. After defining two routes for outgoing and incoming relay to the established NNI link, the outgoing route is connected to the set station number, and the incoming call / outgoing call and the pass through call processing part have a virtual path identifier (VPI :) for each route. This is achieved by attempting a relay call by setting the values of the Virtual Path Identifier (VPCI) and the Virtual Path Connection Identifier (VPCI) to be the same.

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

1 is a block diagram of a pass-through call test apparatus of an ATM VC exchange system to which the present invention is applied. In the drawing, '1' is a subscriber call processor, '2' is a message transfer unit, and '3' is a station number and routing processor. , '4' represents an outgoing call processing unit, '5' represents a passing relay call processing unit, and '6' represents an incoming call processing unit.

First, for the pass-through call test, the ATM VC exchange system under test is set, and the signal point code is defined as C. Then, loop the two NNI links to be tested by cables, and set up a virtual network including two relay switching systems A and B on the looped NNI links. The signal point code of the relay switching system A is defined as A, and the signal point code of the relay switching system B is defined as B, respectively.

The message transfer unit processing unit 2 modifies the routing header of the BISUP message to be transmitted through the signal link as follows, so that the transmitted BISUP message is received again through the signal link.

'Calling point code: A, Calling point sign: C' is modified to 'Calling point sign: C, Calling point sign: B', 'Calling point sign: B, Calling point sign: C' is called 'Calling point sign: C, call point code: A '.

Station number and routing processing section (3) sets the station number for the occurrence of the outgoing call, the number of digits deleted during outgoing is set according to the number translation system of the test target exchange system. Set route 1 and route 2 to the looped NNI link, define route 1 for outgoing and route 2 for incoming. Then, route 1 is connected to the set station number. The number of called party insertion digits for incoming calls for route 2 shall be set according to the number translation system of the switching system under test. The signal point code of the counterpart switching system for each route is set to A for route 1 and B for route 2, respectively.

The outgoing call processor 4, the incoming call processor 6, and the pass through call processor 5 set the values of the virtual path identifier (VPI) and the virtual path connection identifier (VPCI) for routes 1 and 2 to be the same. do.

2 is a flowchart illustrating the processing of the pass through call test method according to the present invention.

The calling terminal generates a call by adding two looping relay station numbers to the called terminal number (10). For example, if the relay station number is 70 and the called party number is 860-1234, the calling terminal should call 70-70-860-1234.

Then, the subscriber call processing section 1 requests the station number translation and outgoing route selection for the received called number to the station number and the routing processing section 3, and the station number and routing processing section 3 requests the station number for the called number. The outgoing call is analyzed through the translation, the outgoing call route is selected, and the result is notified to the subscriber call processor 1 (12).

The subscriber call processing section 1 requests outgoing call processing to the outgoing call processing section 4 (13), and the outgoing call processing section 4 sets the calling point code = C and the called point code = B between stations. A signal message is generated and sent to the message transfer unit processing unit 2 (14).

The message transfer unit processing unit 2 converts the signal point code of the corresponding message into (calling point code = A, called point code = C), and transmits the message through the signal link (15), and also the message transfer unit processing unit ( 2) transmits the message received from the signal link to the pass through call processor 5 (16).

The transit relay call processing section 5 requests the station number translation and outgoing route selection for the called party number to the station number and routing processing section 3 (17), and the station number and routing processing section 3 translates the station number for the called number. Through the analysis of the pass relay call through, select the corresponding outgoing route and notifies the result to the pass relay call processing unit (18) (18).

The pass through call processor 5 generates an inter-station signal message set to (calling point code = C, called point code = B) and sends it to the message transfer unit processing unit 2 (19), and the message transfer unit processing unit 2 Converts the signal point code of the message into (calling point code = A, called point code = C), and transmits the message through the signal link (20), and in the message transfer unit processing unit (2), The received message is transmitted to the incoming call processor 6 (21).

The incoming call processor 6 performs the called number translation on the called number included in the message, requests the incoming call to the subscriber call processor 1, and then continues the call processing (22).

The present invention made as described above is more economical than the conventional method requiring three or more exchange systems because only one exchange system is required for the pass relay test of the ATM VC exchange system, and the maintenance and management of the exchange system is easy. However, since the test is made in one exchange system, the test of the pass-through call is simplified.

The present invention described above is capable of various substitutions, modifications, and changes within the scope without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains, and thus is limited to the above-described embodiments and drawings. It is not.

Claims (1)

Subscriber call processing block (1) connected to the calling terminal and the called terminal, the message transfer block processing block (2), the station number and routing processing block (3), outgoing call processing block (4), passing relay call processing block (5) In the pass-through call test method of the asynchronous transfer mode virtual channel exchange system applied to the pass-through call tester having the incoming call processing block 6, two network nodes to be set up and tested After setting up a virtual network including at least two relay switching systems on a NNI (Network Node Interface) link to form a loop with a cable, the transit relay that adds a looping relay station number to the called terminal number at the calling terminal. When the call is generated, the subscriber call processing block 1 requests the station number translation and outgoing route selection for the received called number as the station number and the routing processing block 3, and the called number and the routing processing block 3 call the called party number. A first step of analyzing the outgoing call through the translation of the station number, selecting the outgoing call route, and notifying the subscriber call processing block 1 of the result; After performing the first step, the subscriber call processing block 1 requests the outgoing call processing to the outgoing call processing block 4, and the outgoing call processing block 4 sets the originating point code and the called point code. A second step of generating an inter-station signal message and sending it to the message transfer unit processing block 2, wherein the message transfer unit processing block 2 converts the signal point code of the corresponding message and transmits the message through the signal link; After performing the second step, the message transfer unit processing block 2 transmits the message received from the signal link to the pass through call processing block 5, and the pass through call processing block 5 to the received call number. For the station number translation and outgoing route selection, the station number and routing processing block (3) are requested, and the station number and routing processing block (3) analyzes the transit relay code through the station number translation for the called party and analyzes the outgoing route. A third step of selecting and notifying the resultant call processing block 5 of the result; After performing the third step, the pass through call processing block 5 generates an inter-station signal message that sets the calling point code and the called point code, sends it to the message transfer unit processing block 2, and sends the message transfer unit processing block ( 2) a fourth step of converting the signal point code of the corresponding message, and transmitting the message through the signal link; And after performing the fourth step, the message transfer unit processing block 2 transmits the message received from the signal link to the incoming call processing block 6, and the incoming call processing block 6 is included in the message. A transit relay call test method comprising a fifth step of performing a called number translation on a called number and requesting an incoming call to a subscriber call processing block (1).