JPH07327031A - In-equipment path test method and its equipment in atm communication equipment - Google Patents

Abstract

PURPOSE:To test all paths normally or at an optional time without affecting on a cell during communication in the ATM communication equipment. CONSTITUTION:An operating state/nonoperating state identifier areas are provided to part of a cell in the equipment and nonoperating cell is set for the test and a test path is set to a VPI/VCI table 3 and the nonoperating cell with an identifier added is inserted into an idle cell position detected by the cell input section and simultaneously the VPI/VCI value of the nonoperating cell is added cyclicly or at random and similarly, the VPI/VCI value of an output destination address of the VPI/VCI table 3 is changed cyclicly or at random to change path setting and nonoperating cell is detected just before the output and it is looped back and a check section 12 detects the returned nonoperating cell to confirm the test result and all paths are confirmed by aborting the result.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test method for an ATM communication device, and more particularly to a device path test method and its device.

[0002]

2. Description of the Related Art Generally, VPI / V is used in an ATM communication device.
The cell is communicated only according to the path set in the CI table. Therefore, as for the test of the ATM communication device, the switching test is repeatedly performed in all the path settings of the VPI / VCI table as a test inspection in the manufacturing stage. As with the above, the ATM communication device configured as a network is to be tested offline, and there is no in-device path test during communication.

[0003]

In the conventional ATM communication system, cells are not communicated except for the paths set in the VPI / VCI table.
Testing of paths not set in the PI / VCI table,
The monitoring function cannot be executed.

An object of the present invention is to use an operating / non-operating identifier added to a cell in a device, insert a non-operating cell for testing an ATM switch into an empty cell timing on the cell input side, Detect the non-operational cell on the output side,
By using the cell loopback function and returning to the check section, it is possible to provide a method and device that enable confirmation of all paths at all times or at any time without affecting the data of operating paths. is there.

[0005]

An in-device path test method in an ATM communication device according to the present invention is an in-device path test of an ATM communication device which performs switching by a VPI which is a virtual path identifier of a cell and a VCI which is a virtual channel identifier. A method, wherein a step of providing an identifier area indicating whether the cell format set in the device is in operation or not, and a VPI / VCI table in which a path corresponding to VPI and VCI used for cell switching is set In the path unset location, the step of setting a cyclic or random test path, the step of setting a non-operation cell that confirms the test path as the in-device cell format, and the detection of an empty cell on the cell input side , A step of replacing and inserting the non-operational cell into the empty cell position for testing the ATM switch. And the inserted non-operational cell is detected as a non-operational cell on the cell output side, the detected non-operational cell is returned, the returned non-operational cell is detected, the test result is confirmed, and the cell is discarded. Have the steps to:

Further, in the in-device path test apparatus in the ATM communication apparatus of the present invention, the ATM communication apparatus has at least a plurality of cell input sections, a plurality of cell output sections, an ATM switch section for performing switching, and a VPI / An intra-device path test device in an ATM communication device having a VCI table and a cell loopback unit, in which a cell format in the device is set with an identifier area indicating whether the device is in operation or not, and the path is set to VPI. / A control unit that sets a cyclic or random test path in a path unset location of the VCI table and controls a non-operating cell insertion unit, an empty cell detection unit that detects an empty cell on the cell input side, and the empty space A non-operational cell insertion unit that replaces and inserts the non-operational cell into the cell position for testing the ATM switch, and outputs the inserted non-operational cell to the cell. Detected on the side, folded detected the nonoperating cell, by detecting the non-operational cells folded confirmed test results, has a nonoperating cell detection / check section for discarding.

[0007]

In the in-device path test in the ATM communication device of the present invention, the path of the VPI / VCI table in which the switching path is set by using the in-operation / non-operation identifier added to the area of the in-device cell A cyclic or random test path is set in the unset portion, a vacant cell is detected at the input side of the cell, a non-operation cell is inserted in the vacant cell for testing the ATM switch, and a non-operation cell is set at the output side of the cell. The operating cell is folded back, the folded non-operating cell is detected, the test result is confirmed, and the cell is discarded.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the present invention. In FIG. 1, an ATM communication device for switching has an input for external input as a signal route from left to right.
₁₁ , VPI / VCI table 3, and ATM switch unit 2 for switching ATM cells according to their contents
And an output ₁₄ for outputting to the outside. Similarly,
As a signal route from right to left, an input ₂ 5, the output
₂ 7 and. In addition, the non-operating cell detection unit 10 and A
Loops back TM switch section 2 cells after passing through the immediately preceding output ₁ 4, and a cell loopback unit 11 to put the input ₂ 5 to the flow of the ATM switch unit 2 direction of the cells.
In addition, as a block required for the present invention, an empty cell detection unit 8, a non-operational cell insertion unit 9 for transmitting a non-operational cell, a non-operational cell after switching are detected, and the cell is detected. It has a non-operating cell detecting / checking unit 12 that returns to the sending point and checks the non-operating cell that has returned. Further, it has a VPI / VCI table 3 and a control unit 6 that controls the non-operating cell insertion unit 9.

Next, the operation of the present invention will be described. In the device, as the cell format in the device, the setting of the identifier area in operation / non-operation in a part of the cell in the device and the VPI
/ VCI table 3 sets a test path for checking an unset path, adds an identifier to a cell in the device, and corresponds to the test path, and an identifier in operation / in operation indicates non-operation. The setting of the non-operating cell is performed by the processing of hardware or hardware and software. On the input side of the cell, a vacant cell is detected by the vacant cell detection unit 8, and the non-operating cell is inserted into the position of the vacant cell by the non-operating cell inserting unit 9 for testing the ATM switch. The VPI and VCI values of the non-operating cell to be transmitted are cyclically or randomly added. Similarly, the control unit 6 controls the V
The output destination address of the PI / VCI table 3 is cyclically or randomly changed. The cells are switched by the ATM switch unit 2 according to the VPI / VCI table 3. When the non-operational cell detection unit 10 immediately before output detects the non-operational cell, the cell loopback unit 11 returns the non-operational cell, and the non-operational cell detection / check unit 12 returns the non-operational cell. Detect the medium cell, confirm the test result, and discard. Next, confirm the unset path.

[0010]

As described above, the method and the device thereof according to the present invention influence the data in operation by using the identifiers in operation / non-operation as the cell format of the cells in the device. Instead, there is an effect that it is possible to confirm all paths at all times or at any time. In addition, since the operating / non-operating identifier is valid only in the device, there is an effect that an OAM cell that requires new standardization becomes unnecessary.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

[Explanation of symbols]

1 input ₁ 2 ATM switch section 3 VPI / VCI table 4 output ₁ 5 input ₂ 6 control section 7 output ₂ 8 empty cell detection section 9 non-operating cell insertion section 10 non-operating cell detection section 11 cell loopback section 12 non Cell detection / checking section during operation

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location 9371-5K H04L 13/00 315 A

Claims (2)

[Claims] 1. An in-device path test method for an ATM communication device that performs switching using VPI, which is a virtual path identifier of a cell, and VCI, which is a virtual channel identifier, and is used in a cell format set in the device. A step of providing an identifier area indicating whether or not it is in operation, and a step of setting a cyclic or random test path at a path unset portion of a VPI / VCI table in which a path corresponding to VPI and VCI used for cell switching is set And a step of setting a non-operation cell for confirming the test path as an in-device cell format, and detecting an empty cell on the cell input side, and
Inserting and replacing the non-operational cell for testing the TM switch; detecting the inserted non-operational cell as a non-operational cell on the cell output side; returning the detected non-operational cell; An in-device path test method in an ATM communication device, comprising the steps of detecting the non-operational cell, confirming the test result, and discarding. 2. The ATM communication device includes at least a plurality of cell input units, a plurality of cell output units, an ATM switch unit that performs switching, and a VPI / VCI table.
An intra-device path test device in an ATM communication device having a cell loopback unit, wherein a VPI / VC in which a path is set by setting an identifier area indicating whether it is in operation or non-operation in a cell format in the device
A control unit that controls a non-operating cell insertion unit by setting a cyclic or random test path in a path not set in the I table, an empty cell detection unit that detects an empty cell on the cell input side, and the empty cell A non-operational cell insertion part for replacing and inserting the non-operational cell for testing the ATM switch at the position, the inserted non-operational cell is detected at the cell output side, and the detected non-operational cell is folded back and folded back. An in-device path test device in an ATM communication device having a non-operation cell detection / check unit that detects the non-operation cell, confirms the test result, and discards the non-operation cell.