JPH1066108A - Cross connecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cross connecting device which can normally control cross connection, even when there is difference in receiving time of cross connection controlling command between own station and the other station. SOLUTION: By providing a switching path trace value holding part 5 which holds switching path trace value for other station of received end before branching of its own station of a sending end in a controlling part 4, even if switching path trace value. Switched path trace value do not match because there is difference between their receiving time of cross connection controlling command, both values are made to match each other, and also cross connection can be controlled normally by comparing switching the path trace value with the switched path value which is held in the path 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross-connect device, and more particularly to a cross-connect device for performing switching by a cross-connect control command for bidirectional batch switching by a host device.

[0002]

2. Description of the Related Art Conventionally, this type of cross-connect control
In the cross-connect device that is bidirectionally communicating with the opposing station, the cross-connect control command for bidirectional batch switching by the higher-level device causes the own station transmitting side to branch to the opposing station,
After branching, compare the path trace values included in the specific byte in the switching source and switching destination transmission path signals specified by the command after branching, switch the counter station receiving side if they match, and after the end of switching , A cross-connect control process for canceling the switching source branch has been performed.

FIG. 4 is a configuration diagram of a conventional cross-connect device. The conventional cross-connect device 50 includes path trace value acquisition units 2-1 to 2-n (n is an integer of 2 or more) for reading a path trace value on the signal receiving side;
A switch unit 3 for cross-connecting an input signal; and a path trace value acquisition unit 2 based on a control command from a higher-level device.
Control unit 5 for controlling -1 to 2-n and switch unit 3
1 is provided.

[0004] The switch unit 3 has a branch processing function for the transmission side and a switching function for cross-connection control for the reception side.

FIG. 5 is a configuration diagram of a control unit. Control unit 5
1 is a path trace value collection unit 52 that collects the path trace values obtained by the path trace value acquisition units 2-1 to 2-n.
A comparing unit 53 for comparing the receiving-side switching source path trace value and the receiving-side switching destination path trace value collected by the path trace value collecting unit 52; and a switch unit based on the comparison result of the comparing unit 53. Switch control unit 54 that controls
And

Next, the operation of bidirectional batch switching will be described. FIG. 6 is a diagram illustrating the operation of bidirectional batch switching.

When the control unit 51 receives a cross-connect control command for bidirectional batch switching from a higher-level device (not shown), the control unit 51 first causes the switch unit 3 to branch the transmitting side of the own station A and the opposite station B. Let That is, the own station A branches the transmission path to the switching source transmission path C and the switching destination transmission path D, and the opposite station B branches the transmission path to the switching source transmission path E and the switching destination transmission path F.

Next, a path trace value included in a specific byte in the receiving-side switching source and switching destination transmission paths specified by the command after the branch is read from the path trace value collection unit 52, and both are read by the comparison unit 53. Let me compare. That is, the receiving-side switching source path trace value P1 of the opposite station B is compared with the switching destination path trace value P2, and the receiving-side switching source path trace value P3 and switching destination path trace value P3 of the own station A are compared.
4 is compared.

If the comparison results match, the control unit 5
1 causes the switch unit 3 to switch the receiving side (switch the transmission path C to D and the transmission path E to F), and release the switching source branch (transmission paths C and E) after the switching is completed.

[0010] Also, in Japanese Patent Application Laid-Open No. Hei 3-214949,
The reception interface unit inserts the signal path verification information into the undefined VT path overhead part of the VT signal, and the transmission-side interface unit detects the signal path verification information, thereby verifying the signal path. A signal path verification method for a connect device is disclosed.

[0011]

However, in the conventional cross-connect control processing method of the cross-connect device, the control of the own station is performed in a situation where the opposite station has executed the control first and is in the transmission branch state. When the opposite station confirms the match of the path trace value at the same time as the branch on the transmitting side of the own station, executes switching, and the opposite station releases the switching source branch, the switching source and destination paths received by the own station are canceled. There is a disadvantage that the trace values do not match and switching cannot be completed normally.

That is, since the cross-connect control command is usually sent to the own station and the opposite station almost simultaneously, the cross-connect control command is sent to one of them first, and one of them switches first. When executing and canceling the switch source branch, the other end of the switch work at that point, so that the path trace values of the switch source and the switch destination do not match on the other side.

Further, Japanese Patent Application Laid-Open No. 3-214949 does not disclose a solution in the case where the bidirectional switching is not performed simultaneously.

It is an object of the present invention to provide a cross-connect device that can perform normal cross-connect control even when there is a difference in the cross-connect control command reception time between the own station and the opposite station.

[0015]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a cross-connect device which bidirectionally communicates with an opposite station and switches a transmission path by a cross-command of bidirectional batch switching by a higher-level device. A path trace value acquiring means for reading a path trace value on the receiving side; and a switching source path trace value for holding the opposite station receiving side switching source path trace value before branching on the own station transmitting side from the path trace value acquiring means. Holding means, switching destination path trace value collecting means for collecting the opposite station receiving side switching destination path trace value after branching from the path trace value acquiring means to the local station transmitting side, and Comparison for comparing the switching source path trace value read from the path trace value holding means with the switching destination path trace value read from the switching destination path trace value collecting means And the step, characterized in that it comprises a switching means for switching the transmission path, and a switch control means for controlling said switching means based on the comparison result from said comparison means.

[0016]

The switching source path trace value is held in the switching source path trace value holding means before the branch on the transmitting side of the own station, and the path trace value is held in the path trace value holding means after the branch on the transmitting side of the own station. The comparison unit compares the original path trace value with the switching destination path trace value collected by the switching destination path trace value collection unit.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the following drawings, the same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 1 is a block diagram of an embodiment of a cross-connect device according to the present invention. The cross-connect device 1 according to the present invention includes a path trace value acquisition unit 2-1 to 2-n (n is an integer of 2 or more) for reading a path trace value on a signal receiving side, and a cross-connect of an input signal. The switch unit 3 includes a control unit 4 for controlling the path trace value acquisition units 2-1 to 2-n and the switch unit 3 according to a control command from a higher-level device. As will be described later, the control unit 4 includes a switching source path trace value holding unit 5 that holds the switching source path trace values acquired from the path trace value acquisition units 2-1 to 2-n by a control command from a higher-level device.

The switch unit 3 has a branch processing function for the transmission side and a switching function for cross-connection control for the reception side.

FIG. 2 is a block diagram of an embodiment of the control unit.
The control unit 4 includes a collection control unit 6 that controls which path trace value of the switching source or the switching destination is acquired from the path trace value acquiring units 2-1 to 2-n, and a switching unit that retains the switching source path trace value. Original path trace value holding unit 5 and switching destination path trace value collecting unit 7 for collecting switching destination path trace values
A comparing unit 8 that compares the contents of the switching source path trace value holding unit 5 with the contents of the switching destination path trace value collecting unit 7, and a switch control unit 9 that controls the switch unit 3 based on the comparison result of the comparing unit 8. And an alarm device 10 that sounds an alarm based on the result of comparison by the comparing unit 8.

Next, the operation of the cross-connect device will be described. FIG. 3 is a flowchart showing the operation of the cross-connect device.

In the cross-connect device 1 which is performing bidirectional communication with the opposing station, when the control unit 4 receives a control command for bidirectional batch switching from the higher-level device in S1, the control unit 4 proceeds to S2 and holds the switching source path trace value holding unit. 5 holds the switching source path trace value. Next, the process proceeds to S3, where the switch unit 3 performs a branching process on the transmitting side of the own station to the opposite station in accordance with a command from the control unit 4, and further proceeds to S4. Collects the path trace value of the switching destination transmission line specified by the command. And S5
The comparison unit 8 compares the contents of the switching source path trace value holding unit 5 with the contents of the switching destination path trace value collection unit 7, and if the comparison results match, the processing proceeds to S6 and the switching unit 3 The switching unit 3 performs the switching process on the side, and further proceeds to S7, and after the switching is completed, the switch unit 3 releases the switching source branch.

On the other hand, if the result of the comparison does not match in S5, the process proceeds to S8, and the control unit 4 invalidates the switching. Also,
At this time, the control unit 4 drives the alarm device 10 to sound an alarm, and informs the user that the switching is abnormal.

[0024]

According to the present invention, since the switching source path trace value holding means is configured to hold the switching source path trace value of the opposite station reception side before branching on the transmission side of the own station, the switching between the own station and the opposite station is performed. Even if there is a difference in the reception time of the cross-connect control command and the path trace values no longer match, the path trace value held by the switching source path trace value holding unit and the path trace value collected by the switching destination path trace value collection unit , The cross-connect control can be normally executed and terminated.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of a cross-connect device according to the present invention.

FIG. 2 is a configuration diagram of an embodiment of a control unit of the cross-connect device.

FIG. 3 is a flowchart showing the operation of the cross-connect device.

FIG. 4 is a configuration diagram of a conventional cross-connect device.

FIG. 5 is a configuration diagram of a control unit of the cross-connect device.

FIG. 6 is an explanatory diagram of an operation of bidirectional batch switching of the cross-connect device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cross-connect apparatus 2 Path trace value acquisition part 3 Switch part 4 Control part 5 Switching source path trace value holding part 7 Switching destination path trace value collection part 8 Comparison means 9 Switch control part 10 Alarm device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Eiichi Kamagai 5-7-1 Shiba, Minato-ku, Tokyo Inside NEC Corporation (72) Inventor Kazuhiro Nishihata 3--19 Nishishinjuku, Shinjuku-ku, Tokyo No. 2 Nippon Telegraph and Telephone Corporation

Claims (3)

[Claims] 1. A cross-connect device that bidirectionally communicates with an opposite station and switches a transmission path by a bidirectional batch switching cross command by a higher-level device, and obtains a path trace value that reads a path trace value on a receiving side. Means, a switching source path trace value holding means for holding an opposite station receiving side switching source path trace value before branching of the local station transmitting side from the path trace value obtaining means, and a local station transmitting side from the path trace value obtaining means. A switching destination path trace value collecting means for collecting the opposite station receiving side switching destination path trace value after branching, and a switching source path trace value read from the switching source path trace value holding means after branching on the own station transmitting side. Comparing means for comparing the switching destination path trace value read from the switching destination path trace value collecting means, switching means for switching the transmission path, Cross-connect device which comprises a switch control means for controlling said switching means based on the comparison result from the comparison means. 2. The method according to claim 2, wherein when the comparison result by said comparison means is identical, said switch control means causes said switch means to perform a switching process and to cancel the branch on said own station transmission side. The cross-connect device according to claim 1. 3. The cross-connect device according to claim 1, wherein an alarm is sounded when the comparison result by said comparison means does not match.