JPH1051407A - Command contention control method for sdh backbone transmitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a command contention control method for a synchronous digital hierarchy(SDH) backbone transmitter in which a control command is normally executed even in the case that contention control commands are received in congestion. SOLUTION: A fabric 16 and an AUG 17 (connection terminal/band area control processing part) make inquiry of a command contention control processing section 20 when control commands distributed from a agent 5 are possibly in contention. The command contention control processing section 20 discriminates a use/non-use state of control information used by the control command accordingly based on a flag, replies execution enable when the control information is not use and replies disable execution when the control information is in use. The fabric 16 and the AUG 17 discriminate the possibility of execution of the control command depending on the reply.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a command conflict control method for an SDH backbone transmission device, and more particularly to a command conflict control method for an SDH backbone transmission device when a plurality of control commands using the same control information are received. .

[0002]

2. Description of the Related Art In a high-speed digital communication network, when information having different transmission speeds based on an existing hierarchy is multiplexed and transmitted as broadband information, a synchronous digital hierarchy (hereinafter referred to as SDH) is used.
hy). In such an SDH-synchronous optical communication network based on SDH, speed conversion and exchange connection of various kinds of information are realized by an SDH cross-connect backbone transmission device (hereinafter referred to as SDH-DCS).

FIG. 3 is a block diagram showing the configuration of a general network management system. In FIG. 3, reference numeral 1 denotes an SDH-D.
A network management device (hereinafter referred to as OpS) for managing CS3;
Reference numeral 2 denotes a plurality of operator terminals (WS) provided for each network management function, and various control commands input by each operator terminal 2 are transmitted via the OpS 1 to the SDH-DCS.
3 is transferred. FIG. 4 shows an SDH cross-connect trunk transmission device (SDH-DC) among conventional SDH trunk transmission devices.
It is a functional block diagram which shows the command processing system of S).

In FIG. 1, reference numeral 5 denotes a command receiving / distribution processing unit (hereinafter referred to as an agent) which receives various control commands from the OpS 1 and distributes the control commands to the corresponding various control processing units; 5, a cross-connect setting control processing unit (hereinafter, referred to as VC) that sets a cross-connect state of a virtual container (hereinafter, VC) storing information based on the existing hierarchy.
Reference numeral 7 denotes a connection termination point band control processing unit (hereinafter, referred to as AUG) for setting a multiplexing mode at the connection termination point, that is, a VC band, in accordance with a control command distributed from the agent 5.

Reference numeral 8 denotes a connection termination point information management unit that manages various control information indicating the state of each connection termination point;
Reference numeral 9 denotes hardware for actually controlling the cross-connect state and the multiplexing mode at the connection termination point based on an instruction from the fabric 6 or the AUG 7. Conventionally, as shown in FIG. 3, a control command input from an operator terminal 2 is transmitted via SDH-
It is input to the agent 5 of DCS3. Here, it is distributed to various control processing units according to the type of the control command,
Each is executed in parallel.

When the input control command is to set a cross-connect state, the control command is distributed to the fabric 6. The fabric 6 changes and sets the value of various control information indicating the state of each connection termination point held in the connection termination point information management unit 8 based on the distributed control command, so that the connection in the cross-connection state is performed. / Release is controlled, and the hardware 9 is controlled based on the value. Note that the connection termination point terminates the STM frame flowing through the SDH synchronous optical communication network when the cross-connect is not connected, and MS-OH (Multiplex Section) in which various management information is stored in the cross-connect state. -OverHead) is the end point that runs to the end.

When the input control command is for setting the multiplexing mode of the connection termination point, it is distributed to the AUG7. The AUG 7 transmits the connection termination point information management unit 8 based on the distributed control command.
The control of the multiplexing mode of the connection termination point, that is, the change of the VC band allocation, is controlled by referring to the values of various control information indicating the state of each connection termination point held in the connection.

[0008]

Therefore, in such a conventional SDH cross-connect backbone transmission apparatus, the Op
Since the control command input from S1 is distributed by the agent 5 and executed independently and in parallel by each processing unit, a plurality of control commands input almost simultaneously from a plurality of operator terminals 2 are the same. When the value of the control information is changed or set, it is executed in conflict with each other, which causes a problem. For example, when a control command is executed by referring to the value in the AUG 7 while the value of any control information is changed and set by the fabric 6, when the control command is executed in the AUG 7 before and after the control command is executed. Since the values are different from each other, there is a problem that the value of the held control information and the multiplexing mode of the actual connection termination point do not match, which causes a problem.

Conventionally, as a command conflict method in an exchange system, a main command conflict management unit for managing command conflicts in the entire system is provided in a master processor, and a sub-command management unit for managing command conflicts in each sub-processor is provided. There has been proposed a method in which a command determined to be unexecutable by the master processor due to contention is made executable by the sub-processor (for example, Japanese Patent Application Laid-Open No. 1-128695). It has been difficult to apply this in a case where the processing unit executes control commands using the same control information in parallel. The present invention has been made to solve such a problem, and provides a command contention control method of an SDH backbone transmission apparatus that can execute a control command normally even when a conflicting control command is input congested. It is intended to be.

[0010]

In order to achieve the above object, a command contention control method for an SDH backbone transmission apparatus according to the present invention provides a method for determining whether or not control information used for an arbitrary control command is being used. And a command conflict control processing unit that replies that the control command can be executed when it is not in use and replies that the control command cannot be executed when it is in use. If the control commands have a possibility of conflict, the command conflict control processing unit is inquired about whether or not the control command can be executed, and the execution of the control command is determined according to the response.

A command conflict control processing unit is provided for each control information commonly used by a plurality of control processing units.
It has a use flag indicating the used / unused state, and a flag management unit that manages each use flag.
In response to an inquiry from each control processing unit, reference is made to the use flag corresponding to the control information used in the control command. If the use flag indicates unused, the use flag is set to in use and the control command Executable is returned, and if the use flag indicates that the control command is being used, the control command is rejected, and control information used in the control command is returned in response to the control command execution completion notification from each control processing unit. Is set to unused. The control processing unit includes a cross-connection setting control processing unit that controls connection / disconnection of a cross-connection state according to a predetermined control command, and a connection that sets a multiplexing mode at a connection termination point according to the predetermined control command. The command control processing unit includes a termination point band control processing unit, and responds to the use / non-use of the control information indicating the state of the connection termination point in response to whether the control command can be executed.

Therefore, when there is a possibility that the distributed control commands conflict with each other, each of the control processing units inquires of the command conflict control processing unit whether or not the control command can be executed. The processing unit checks whether or not the control information used for the control command is in use. If the control information is not used, the execution of the control command is replied. A response indicating that execution is impossible is returned, and execution of the control command is determined by each control processing unit according to the response.

[0013]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a functional block diagram showing a command processing system of an SDH cross-connect backbone transmission apparatus according to a command contention control method according to one embodiment of the present invention. In FIG. 1, the same or equivalent parts as those described above (FIG. 4) are used. Are given the same reference numerals. In FIG. 1, reference numeral 20 denotes a use flag indicating the used / unused state corresponding to various control information indicating the state of all connection end points held in the connection end point information management unit 8. A command conflict control processing unit that determines whether a control command can be executed by referring to a use flag.

16 inquires of the command conflict control processing section 20 whether or not execution is possible when the control command distributed from the agent (command reception / distribution processing section) 5 can cause a conflict. A fabric (cross-connect setting control processing unit) that executes the control command in response to the reply and performs cross-connect state change setting;
17, when the control command distributed from the agent 5 can generate a conflict, the command inquiry control unit 20 inquires of the command conflict control processing unit 20 whether or not the command can be executed, and executes the control command in response to the reply of the executable. An AUG (connection termination point bandwidth control processing unit) that changes the mode of the connection termination point.

FIG. 2 shows a command conflict control processing unit 20.
In the figure, reference numeral 22 denotes a control information stored in the connection termination point information management unit 8, that is, various control information indicating states of all connection termination points. A use flag 21 indicating the use / non-use state of each control information. The use flag 21 determines the execution possibility by referring to the use flag 22 corresponding to the execution permission inquiry from the fabric 16 and the AUG 17, and The flag management unit responds accordingly.

Next, the operation of the present invention will be described with reference to FIGS. OpS1 (network management device: see FIG. 3)
Are received by the agent 5 and distributed to various processing units according to the type. now,
When the control command for setting the cross-connect state is delivered to the fabric 16, the fabric 16 first determines whether or not the control command has a possibility of causing a conflict, that is, whether or not an execution availability inquiry is required.

In this table, the necessity of an execution availability inquiry is set in advance in a table corresponding to each control command, and the necessity of the inquiry is determined by referring to this table.
Here, when it is determined that an inquiry is necessary, an inquiry is made to the command conflict control processing unit 20 as to whether or not the control command can be executed. Command conflict control processing unit 2
The flag management unit 21 of 0 refers to the use flag 22 corresponding to the control information of the connection termination point used in the control command in response to the inquiry about whether the command can be executed from the fabric 16.

Here, when the corresponding use flag 22 indicates unused, execution is returned to the fabric 16 and the use flag 22 is set to "in use". When the use flag 22 indicates that the apparatus is in use, a reply indicating that execution is impossible is returned. When the execution response is returned from the command conflict control processing unit 20, the fabric 16 controls the connection termination point in the connection termination point information management unit 8 used in the control command, that is, the command conflict control processing unit 20. The setting and the value of the control information confirmed to be unused are changed, and the connection / disconnection of the cross-connect state is performed by controlling the hardware 9.

When the command conflict control processing unit 20 returns a message indicating that execution of the control command is impossible, it is notified via the agent 5 that the control command cannot be executed.
Notify. Thereby, the operator terminal 2 is changed from Osp1.
Is notified that the control command has not been executed.

On the other hand, almost simultaneously with the control command for setting the cross-connect state distributed to the fabric 16,
A control command for changing the mode of the connection termination point is input to the agent 5, and this control command is AUG
17, the AUG 17 first determines whether or not the control command has a possibility of causing a conflict, that is, whether or not an execution availability inquiry is necessary, as described above. If you determine that an inquiry is needed,
It inquires of the command conflict control processing section 20 whether or not the control command can be executed.

The flag management unit 21 of the command conflict control processing unit 20 refers to the use flag 22 corresponding to the control information of the connection end point used in the control command in response to the command execution permission inquiry from the AUG 17.
Here, when the corresponding use flag 22 indicates unused, execution is returned to the fabric 16 and the use flag 22 is set to be in use. When the use flag 22 indicates that the apparatus is in use, a reply indicating that execution is impossible is returned.

Therefore, if the control command uses the same control information as the control command for setting the cross-connect state, the use flag 22 corresponding to the control information is set to "in use". Therefore, the execution failure is returned to the AUG 17. In response, the AUG 17 notifies the Osp1 via the agent 5 that the control command cannot be executed, and the Osp1 notifies the operator terminal 2 that the control command has not been executed.

As a result, the control commands using the same control information are executed exclusively, and the occurrence of a failure due to command conflict is avoided. In addition,
The fabric 16 and the AUG 17 notify the flag management unit 21 of the command conflict control processing unit 20 of the completion of the execution of the control command. Thereby, the flag management unit 21 sets the corresponding use flag 22 to unused, and
Permits subsequent control commands to use the control information.

As described above, the command conflict control processing unit 20 which replies whether each control command can be executed based on the use / unused state of the control information commonly used by the plurality of control processing units is provided. When there is a possibility that the distributed control commands conflict, the control processing unit inquires of the command conflict control processing unit 20 whether or not the control command can be executed, and determines the execution of the control command according to the response. Therefore, even when control commands using the same control information are input at almost the same time, any of the control commands can be executed exclusively, and more accurate command conflict control can be performed. It is possible to avoid problems due to competition.

The command contention control processing unit 20 uses control information indicating the state of the connection termination point.
Based on the unused status, the execution of each control command is replied, and the fabric (cross-connection setting control processing unit) 16 and the AUG (connection termination point band control processing unit) 17 determine whether the distributed control command is When there is a possibility, the command contention control processing unit 20 is inquired about whether or not the command can be executed, and the execution of the control command is determined according to the response.
It is possible to suppress contention that is likely to occur in the cross-connect backbone transmission device, that is, contention of a control command that uses control information of a connection termination point, and to reliably avoid problems caused by this.

[0026]

As described above, according to the present invention, it is determined whether or not the control information used for an arbitrary control command is being used, and if the control information is not used, the control command is returned as executable. In addition, a command conflict control processing unit that responds that the control command cannot be executed when in use is provided,
When the distributed control commands have a possibility of conflict, each control processing unit inquires of the command conflict control processing unit whether or not the control command can be executed, and determines the execution of the control command according to the response. Therefore, even when control commands using the same control information are input at almost the same time, any of the control commands can be executed exclusively, and more accurate command conflict control can be performed. It is possible to avoid problems due to competition.

The command conflict control processing unit is provided for each control information commonly used by a plurality of control processing units.
A use flag indicating the used / unused state and a flag management unit for managing each use flag are provided, and the flag management unit provides control information used in a control command in response to an inquiry from each control processing unit. See the corresponding usage flag,
If the use flag indicates unused, the use flag is set to be used and the execution of the control command is replied, and if the use flag indicates use, the control command is rejected and returned. The use flag corresponding to the control information used in the control command is set to unused according to the notification of the completion of the execution of the control command from the unit, so that accurate command conflict control can be realized relatively easily. Becomes possible.

Further, the control processing unit controls a connection / disconnection of the cross-connect state according to a predetermined control command, and a multiplexing mode at a connection termination point according to the predetermined control command. A connection termination point bandwidth control processing unit to be set, and the command control processing unit returns whether or not the control command can be executed in response to use / non-use of control information indicating the state of the connection termination point. Therefore, it is possible to suppress the contention that is likely to occur in the SDH cross-connect backbone transmission device, that is, the contention of the control command using the control information of the connection termination point, and to reliably avoid the trouble caused by this.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing a command processing system of an SDH cross-connect backbone transmission device according to one embodiment of the present invention.

FIG. 2 is a functional block diagram illustrating a command conflict control processing unit.

FIG. 3 is a block diagram showing a general network management system.

FIG. 4 is a functional block diagram showing a command processing system of a conventional SDH cross-connect backbone transmission device.

[Explanation of symbols]

1. Network management device (OpS) 2. Operator terminal (W
S), 3 ... SDH cross-connect backbone transmission device (SDH
DCS), 5: Command reception / delivery processing unit (agent), 16: Cross-connect setting control processing unit (fabric), 17: Connection termination point bandwidth control processing unit (AUG), 8: Connection termination point information management unit, 9 ...
Hardware, 20 ... command conflict control processing unit, 21 ...
Flag management unit, 22... Use flag.

Claims (3)

[Claims] A plurality of control processing units for executing the control commands in parallel, distributing a control command from a network management device to a predetermined control processing unit, and using a common control information to execute each control processing. Executing the control command in the section
In an SDH backbone transmission apparatus for controlling a DH synchronous optical communication network, it is determined whether or not control information to be used for an arbitrary control command is being used, and if it is not used, the execution of the control command is returned. And a command conflict control processing unit for replying that the control command cannot be executed when the control command is being used. Each of the control processing units has a command conflict control unit when there is a possibility that the distributed control commands conflict with each other. A command contention control method for an SDH backbone transmission device, wherein a query is made to a processing unit as to whether or not the control command can be executed, and the execution of the control command is determined according to a response. 2. A command conflict control method for an SDH backbone transmission apparatus according to claim 1, wherein a command conflict control processing unit is provided for each control information commonly used by a plurality of control processing units, and whether the command conflict control processing unit is used or not used. It has a use flag indicating a state, and a flag management unit that manages each use flag. The flag management unit responds to an inquiry from each control processing unit,
Referring to a use flag corresponding to the control information used in the control command, and when the use flag indicates unused, the use flag is set to be used and a response indicating that the control command can be executed is returned. If the usage flag indicates in use,
The control command is rejected, and the use flag corresponding to the control information used in the control command is set to unused in response to the control command execution completion notification from each control processing unit. A command conflict control method for an SDH backbone transmission device. 3. The cross-connection setting control processing unit according to claim 1, wherein the control processing unit controls connection / disconnection of a cross-connection state according to a predetermined control command. And a connection termination point band control processing unit that sets a multiplexing mode at the connection termination point according to a predetermined control command, wherein the command control processing unit uses / not uses control information indicating a state of the connection termination point. A command contention control method for an SDH backbone transmission apparatus, characterized in that the control command execution response is returned in response to use.