KR19980046375A - Subscriber Switching Subsystem of ATM Switching System and Port Connection Path Test Method Using the Switch - Google Patents

Abstract

The present invention relates to an apparatus and a port connection path test method for testing a connection state and a performance state in a single ALS. The present invention relates to a switching means that is a magnetic routing switch module, control means for call processing and maintenance of a user, subscribers and relay lines. A first means for receiving a path test request from an operator, the first means comprising a matching means for matching, and a test means connected to the control means and the switching means to perform a connection path test in the subscriber switching subsystem. In the first step, the test apparatus is provided as routing header information to be attached to the test cell in the test apparatus, in the second step of checking the type of the port required for the test, and in the case of the port connected to the control unit from the port type investigation result access switch of the second step. Extracting the connected port number; and routing routing information extracted in the third step. And a fourth step of requesting a path test by the test apparatus receives the path test results from the testing apparatus consists of a fifth step for outputting to the operator.

Description

Subscriber Switching Subsystem of ATM Switching System and Port Connection Path Test Method Using the Switch

The present invention relates to an apparatus and a port connection path test method for testing a connection state and a performance state in a single ALS. The ATM switching system includes a connection path between a switch and a subscriber / relay board, a connection path between a switch and a switch, a processor, Because there are various internal paths such as connection paths of switches, the status of the paths must be managed and maintained.

In the conventional ATM switching system, since there is no test method for designating a specific port and checking the connection status during the operation of the switching system, a path test method that does not affect the general user call service is required even when the switching system is in operation.

Accordingly, the present invention is to provide a test apparatus and method for checking the connection state and the performance state of all ports of a single ALS without affecting the user call service during system operation.

1 is a block diagram of an ATM switching system,

2 is an inter-block link diagram for performing a path test according to an embodiment of the present invention,

3 is a connection path diagram between the CCCP and the ASW according to an embodiment of the present invention,

4 is an explanatory diagram showing routing tag information attached by a test apparatus for performing a connection path test between a CCCP and an ASW according to an embodiment of the present invention;

5 is a connection path diagram between the CCCP and the IM according to an embodiment of the present invention,

6 is an explanatory diagram showing routing tag information attached to a test apparatus and an IM to perform a path test connecting a CCCP and an IM according to an embodiment of the present invention;

7 is a connection path diagram between the CCCP and CSW according to an embodiment of the present invention,

8 is an explanatory diagram showing routing tag information attached by a test apparatus for performing a path test connecting a CCCP and a CSW according to an embodiment of the present invention;

9 is an explanatory diagram showing the contents of a path test input command according to an embodiment of the present invention;

10 is an explanatory diagram showing contents of a path test result output according to an embodiment of the present invention;

11 is a flowchart illustrating a method for performing a path test according to an embodiment of the present invention.

The subscriber switching subsystem of the ATM switching system provided by the present invention includes switching means, which are self-routing switch modules, control means for user call processing and maintenance, matching means for subscriber and relay line matching, the control means and And a test means connected to the switching means to perform a connection path test in the subscriber switching subsystem. The port connection path test method using the same comprises: a first step of receiving a path test request from an operator; A second step of checking the type of the port required for the test; and a port number to which the test device is connected as routing header information to be attached to the test cell in the test device when the port type is the port connected to the controller from the access type switch result of the second step. The third step of extracting the, and by the routing header information extracted in the third step And a fourth step of requesting a route to the testing unit test, take the path to the test results from the testing apparatus consists of a fifth step for outputting to the operator.

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

1 is a block diagram of an ATM switching system, Figure 2 is a block diagram for inter-block connection for performing a path test according to an embodiment of the present invention, Figure 3 is a connection path diagram of the CCCP and ASW according to an embodiment of the present invention 4 is an explanatory diagram showing routing tag information attached to a test apparatus for performing a connection path test between CCCP and ASW according to an embodiment of the present invention, and FIG. 5 is a diagram showing CCCP and IM according to an embodiment of the present invention. 6 is an explanatory diagram showing routing tag information attached to a test apparatus and an IM to perform a path test for connecting a CCCP and an IM according to an embodiment of the present invention, and FIG. 7 is an embodiment of the present invention. FIG. 8 is a diagram illustrating a connection path between CCCP and CSW, and FIG. 8 is an explanatory diagram showing routing tag information attached by a test apparatus to perform a path test connecting CCCP and CSW according to an embodiment of the present invention, and FIG. Of the present invention 10 is an explanatory diagram showing contents of a path test input command according to an embodiment, FIG. 10 is an explanatory diagram showing contents of a path test result output according to an embodiment of the present invention, and FIG. 11 is a flowchart illustrating a method for performing a path test according to an embodiment of the present invention. to be.

Referring to FIG. 1, an ATM switching system is composed of two types of subsystems, an ATM Local Switching Subsystem (ALS) 20 and an ATM Central Switching Subsystem (ACS) 10. .

The ALS 20 has a built-in Access Switching Network Module (ASNM) 21, 21 ', which is a self routing switch module, and has a control unit (CCCP) 24 for user call processing and maintenance. 24 '), a subscriber interface module (SIM) 22, 22' for subscriber matching, and trunk interface module (TIM) 23, 23 'for relay line matching.

The ALS 20 operates as a concentrator having an aggregation ratio of n: m, where n is the number of user-side links 26 and 26 'and m is the number of switch-side links 28 and 28', and the ACS 10 ) Performs an interconnection function between the ALS 20 and acts as a distribution device for a large capacity system.

When the call request is generated from the subscriber, the ALS 20 detects it, performs a call service, translates the called ALS through the called subscriber number under the supervision of the originating ALS, and requests a number translation to the called ALS. Then, the incoming ALS selects the optimal route at the same time as number translation and notifies the originating ALS, and the originating ALS sets up the call path. The originating ALS counts the cells delivered during the call and sends the billing data to the ACS with the user request service after the call is completed. The originating ALS restores the call data to the dormant state.

The ACS 10 is a pure interconnector that does not have a call processing process for exchanging information between the ALS 20, unlike the ALS 20, and does not have a call processing control unit, and the switch network module of the ACS 10. ISNM (Interconnection Switch Network Module) 11 may use the same switch element as the ALS 20 as a magnetic routing switch.

The ACS 10 has an OMP (Operation and Maintenance Processor) 12 for the operation and maintenance of the entire system, as well as system-wide maintenance, testing, measurement and statistical functions, as well as mass storage device control management and operators. Performs various I / O statement control functions.

Referring to FIG. 2, the inter-block linkage for performing the path test according to the present invention is performed by performing a function of processing a command input from an operator in a path test input / output command processing block 2 located in the OMP 12. When a path test command from an operator is inputted to the path test input / output command processing block (210) (210), a test request is made to the path test block (3) for controlling a test target path (220). The notification 290 is output to the operator (300).

The path test block 3 is located in the CCCP 24, 24 ', and performs a series of tasks to prepare for the path test, which first requires the call processing block 4 to allocate the bandwidth required for the path test. 230, when the band is allocated (240), the routing information to the subscriber / relay board (IM) controller (1) after notifying (250) the response (260), the test device (25, 25 ') for testing Send information and request start of test (270). The test information sent to the test apparatuses 25 and 25 'consists of routing information attached to the test cell, the number of test cells, the test run time, and the traffic generation mode.

When test results are transmitted from the test apparatuses 25 and 25 '(280), the test results are notified to the path test input / output command processing block 2 (290).

The test apparatus 25, 25 'generates a test cell containing routing information notified by the path test block 3 (270), transmits the cell along the path, and the transmitted cell receives the path through the path. When the received cell is compared with the transmitted cell, the number of lost cells, the number of error cells, the number of duplicate cells, and the average cell transmission delay are measured, and the result is notified to the path test block (280).

The call processing block 4 manages currently available bands, and performs a function of allocating / releasing a band required for a path test (230, 240).

The subscriber / relay line controller 1 performs a function 260 of modifying the routing tag according to the routing information transmitted by the path test block 250 and looping back the test cell coming into the IM.

When the path test is completed, the path test block 3 returns the band to the call processing block 230 and notifies the subscriber / relay line controller of the loopback termination (250).

Referring to FIG. 3, a path connecting the CCCP and the ASW is as follows.

First, when the operator requests a path test, the path test function in the CCCP 24 requests the test device 25 to generate a test cell (31). Then, the test apparatus 25 generates a test cell with a routing tag, transmits the test cell to the ASW 21 (32), analyzes the test cell looped back from the ASW 21 (33), and stores the test result in CCCP ( Inform 34 of the path test function in the system. The path test function in the CCCP 24 outputs the path test result to the operator when the path test is completed.

In this case, the path test request form of the operator and the path test result form output to the operator are shown in FIGS. 9 and 10.

Referring to FIG. 4, the routing tag information added to the test cell 32 transmitted from the test apparatus 25 to the ASW 21 is that the test cell is looped back from the ASW 21 so that the test apparatus 25 is connected to the test cell 25. The port to which the test device is connected is assigned to the first byte of the routing tag as information for returning to the connected port (41).

Referring to Figure 5, the path connecting the CCCP and the Interface Module (IM) is as follows.

First, when an operator requests a path test, the path test function in the CCCP 24 requests to allocate the bandwidth required for the path test to the call processing block in both directions. When the band is allocated, the IM controller receives the test cell. The path test function in the CCCP 24 notifies the IM controller of the routing information so that the routing tag of the test cell can be changed and looped back.

If the procedure is successful, the path test function in CCCP 24 requires test cell generation with routing information to test device 25 (51). Upon receiving the request, the test apparatus 25 generates a test cell (52) and transmits it to the IM (53), analyzes the test cell (55) looped back from the IM (55), and passes the test result into the CCCP 24. Inform the test function (56).

When the path test is completed, the path test function in the CCCP 24 returns the band to the call processing block, and the IM controller notifies the end of the test and then outputs the path test result to the operator.

Referring to FIG. 6, the routing tag information attached by the test apparatus 25 and the IM 22 to perform a path test connecting the CCCP and the IM may be set by the IM so that the test cell is transmitted to the IM 22. The connected port number is assigned to the first byte of the routing tag (61) and sent to the IM 22, where the IM 22 tests the first byte of the routing tag of the received test cell for the test cell to return to the test apparatus. The device loops back by assigning the port number it is connected to (64).

Referring to FIG. 7, a path connecting the CCCP and the CSW is as follows.

First, when an operator requests a path test, the path test function in the CCCP 24 requests to allocate the bandwidth required for the path test to the call processing block in both directions. When the band is allocated, the path test function in the CCCP 24 Request test cell generation with routing information to test device (71). The test apparatus 25 generates a test cell (72), transmits it to the CSW (73), analyzes the test cell looped back from the CSW (74), and notifies the test result to the path test function in the CCCP 24. (77).

The path test function in the CCCP 24 returns the band to the call processing block when the path test is completed, and outputs the path test result to the operator.

Referring to FIG. 8, the routing tag information attached by the test apparatus for connecting the CCCP 24 and the CSW 11 is the first in the routing tag so that the test cell is transmitted from the test apparatus 25 to the CSW 11. Give the byte the port number 81 of the ASW 21 associated with the CSW 11 and assign the CSW 11 port number 82 associated with the ASW 21 to loop back in the CSW 11. The second byte is assigned, and the port number 83 to which the test apparatus 25 is connected is assigned to the third byte of the routing tag in order to return to the test apparatus 25.

Referring to FIG. 9, the contents of the input command for the path test corresponding to each connection path include an ASW number 91, a path test port number 92, a path test period 93, a path test bandwidth 94, and traffic. It consists of a mode (l cell / equal cell / burst cell) 95.

In addition, referring to FIG. 10, the path test result output contents include an ASW number 101, a path test port number 102, a path test progress time 103, a path test bandwidth 104, a traffic mode 105, It consists of the number of test cells 106, the number of receiving cells 107, the number of error cells 108, the number of lost cells 109, the number of duplicated cells 110, and the cell transmission delay time 111 generated. At this time, the number of test cells 106 generated is the number of test cells generated for the test, and the number of cells 108 having an error is measured by a HEC (Header Error Cotrol) test or a CRC (Cyclic Redundancy Check) error test. .

If the number of cells in which loss occurs 109 is discontinuous in the cell number among cells that are properly received without error, cell loss is generated by the number of discontinuous cells.

The number of duplicated cells 110 is determined to be a duplicated cell if the cell number has the same value among cells correctly received without error. The average cell transmission delay 111 measures the cell transmission delay time and the reception time of the cell in micro sec units.

Referring to Figure 11, the path test method is as follows.

First, if the operator requests a path test (301), the connection type of the port for which the test is required is examined (302). If the investigation 302 is a port connected to the CCCP, after the test apparatus extracts routing header information to be attached to the test cell (303), the test apparatus requests a path test (310), and outputs the result to the operator after the test is completed. (311).

If the survey 302 results in a port connected to the subscriber / relay board, after receiving the bandwidth required for the path test with the call processing function (304), the address of the subscriber / relay board is calculated (306), and the subscriber / relay board is Loopback information is transmitted to loop back the test cell (308). After transmission to the subscriber / relay board, the test apparatus extracts routing header information to be attached to the test cell (309), requests a path test to the test apparatus (310), and outputs the result to the operator after the test is completed (311). ).

If the investigation 302 is a port connected to the CSW, after the bandwidth required for the path test is allocated to the call processing function (305), the test apparatus extracts routing header information to be attached to the test cell (307) and then the path test to the test apparatus. Request (310), and outputs the result to the operator after the test is completed (311).

By using the apparatus and method of the present invention as described above, it is possible to diagnose the location of the failure or prevent the failure through the path test, and to increase the availability of the internal location route, the stability of the path, the reliability.

In addition, it is possible to check whether the system is operating normally by performing the connection verification test of the expanded path after adding the subscriber board in the ALS, the relay board in the ALS, the ALS, and the connection port with the ALS in the ACS. After restoring the location, you can check whether the connection is normal.

As the path test command is input during system operation, the path test is performed with bandwidth allocation as in the case of processing a general user call to the call processing function, so that the path test can be performed without affecting the ongoing call processing service. After the path test is completed, since the allocated band is returned to the call processing function, there is an advantage that it can be used for the required user call service.

The present invention provides a subscriber switching subsystem of an ATM switching system and a port using the same, which test a port connection state and a performance state of a single ATM Local Switching Subsystem (ALS) when a user command is required to perform the operation during the operation of the switching system. The objective is to provide a test method for connecting paths.

Claims (9)

In the subscriber switching subsystem comprising a switching means that is a magnetic routing switch module, control means for user call processing and maintenance, and matching means for subscriber and relay line matching, And means for testing in connection with said control means and said switching means for performing a connection path test in said subscriber switching subsystem. A first step of receiving a path test request from an operator, A second step of examining the type of port for which a test is required in the first step; A third step of extracting a port number to which the test apparatus is connected as routing header information to be attached to the test cell in the case of the port connected to the control unit from the access type switch of the second step; A fourth step of requesting a path test to the test apparatus by the routing header information extracted in the third step; And a fifth step of receiving the path test result from the test device and outputting the result to the operator, and a port connection path test method using the same. The method of claim 2, wherein the first step A switching module number in the subscriber switching subsystem, The port number for the test, Route test duration, Path test bandwidth, A port connection path test method using a subscriber switching subsystem of an ATM switching system, characterized in that a path test is required by an input command configured in a traffic mode. The method of claim 3, wherein the route test progress time is Port connection path test method using the subscriber switching subsystem of the ATM switching system, characterized in that the minute unit. 4. The method of claim 3, wherein the path test bandwidth is A port connection path test method using a subscriber switching subsystem of an ATM switching system, characterized in that the cell unit. 4. The method of claim 3, wherein the traffic mode is A port connection path test method using a subscriber switching subsystem of an ATM switching system, characterized in that it is generated as a uniform cell and a burst cell. The method of claim 2, wherein the third step In the case of the port connected to the resultant subscriber / relay line board in the port type investigation access switch of the second step, the bandwidth required for the path test is allocated to the call processing function. Calculate the address of the subscriber / relay board, After transmitting loopback information to the subscriber / relay board, Extracting a port number to which a subscriber / relay line board is connected as a routing header information to be attached to a test cell from a test device, and extracting a port number to which the test device is connected as routing header information to be attached to a test cell from the subscriber / relay line board; A port connection path test method using a subscriber switching subsystem of an ATM switching system. The method of claim 2, wherein the third step In the second step, if the port type is the port connected to the central switch from the access switch, the test port number is assigned as the routing header information to be attached to the test cell in the test apparatus after the bandwidth required for the path test is allocated to the call processing function and the central switch A port connection path test method using a subscriber switching subsystem of an ATM switching system, characterized in that it extracts the port number and the port number to which the test apparatus is connected. The method of claim 2, wherein the fifth step A switching module number in the subscriber switching subsystem, The port number for the test, Route test duration, Path test bandwidth, Traffic mode, The number of test cells generated, the number of received cells, the number of error cells, the number of lost cells, the number of duplicated cells, A method for testing a port connection path using a subscriber switching subsystem of an ATM switching system, comprising outputting a result of cell transmission delay time to an operator.