KR100385468B1 - Method for assigning cooperatively a reserved exclusive connection of an asynchronous transfer mode switching system - Google Patents

Abstract

The present invention relates to a method for sharing a leased line resource of an asynchronous transfer mode switch, and in particular, the method relates to a VPI / VCI processing unit when a reserved mode is set in a reserved mode under an operator command condition. If the VCI is already allocated on the leased line of the preset reserved mode registered in the database and the reservation time of the newly requested leased line is included in the inactive time of the preset leased line assigned the VPI / VCI, the VPI / VCI of the leased line preset on the new leased line To share. The bandwidth processing unit checks the leased line bandwidth (BW) of the preset reserved mode registered in the database to find a preset leased line to which the reserved time of the newly requested leased line can allocate the bandwidth. Allocate from the set bandwidth of the dedicated line. Therefore, the present invention can share and use resources when setting a leased line that requires the same resources as the VPI / VCI and bandwidth of the leased line during a time when the leased line in the preset reservation mode is inactive.

Description

Method of sharing leased line resources of Asynchronous Transfer Mode Switch {METHOD FOR ASSIGNING COOPERATIVELY A RESERVED EXCLUSIVE CONNECTION OF AN ASYNCHRONOUS TRANSFER MODE SWITCHING SYSTEM}

The present invention relates to a leased line connection method of an Asynchronous Transfer Mode (ATM) exchange, and particularly, when a Permanent Virtual Connection (PVC) is set in a periodic reserved mode, a newly requested reservation time. The present invention relates to a method for sharing a leased line resource of an asynchronous transfer mode switch that can share resources (VPI / VCI, bandwidth) with other leased lines.

In general, a dedicated line (PVC) at a switchboard is a point-to-point connection between the calling party and the called party's subscriber board in the switching network through a terminal (HMI) at the user's request. By establishing Point and Point-to-Multipoint connection, information between two subscribers (send / receive) is transmitted in both directions and one-way within the set bandwidth.

Such dedicated line service may be provided as a virtual path identifier (hereinafter referred to as VPI) and a virtual channel identifier (hereinafter referred to as VCI). In addition, a method of establishing a connection is classified into a fixed mode connection and a reserved mode connection. Fixed mode access is permanently available after the registration of the leased line service until the service is canceled. The reservation mode connection can be serviced during the designated active time by specifying an active time and an idle time that are available at the time of registering the leased line service.

By the way, in the asynchronous transfer mode (ATM) exchange, a dedicated line setting (PVC) scheme in which an active time and an idle time are regularly reserved is based on a man machine command (hereinafter referred to as MMC). Allocate resources (VPI / VCI, bandwidth) in advance and make the leased line active at regular intervals to connect the calling party and called party subscriber boards. The reserved time of the leased line is activated only during the start time and the end time of the active area in the operator command registered in the database DB, and the leased line is deactivated at the remaining time.

Therefore, the leased line reservation setting of the prior art allocates resources (VPI / VCI, bandwidth) from the time when the operator command is received and sets the leased line to the reserved mode, so that all the reserved lines in the reserved mode use the allocated resources.

However, the exchange which provides the leased line service in the conventional reserved mode allocates and uses each resource (VPI / VCI, bandwidth) during the time that all leased lines are set in the reserved mode, and keeps occupying the resources even in the inactive time of the leased line. Therefore, in terms of the entire leased line, the resource capacity becomes very large. That is, since resources are allocated separately for each leased line regardless of the reservation period of the leased line, resource waste is large.

An object of the present invention is to set the leased line in the reservation period in the exchange to solve the problems of the prior art, the resources of the leased line can be shared to the leased line of the new reservation mode while the predetermined leased line is inactive. The purpose of the present invention is to provide a method for sharing leased line resources of an asynchronous transfer mode switch that can be efficiently used.

In order to achieve the above object, the present invention provides a method for setting a reserved mode leased line of an asynchronous delivery mode switch, in which an operator processor receives an operator command (MMC) in a reserved mode and checks an operator condition and a new reservation mode in an operator condition. If there is a dedicated line setting of the virtual path and virtual channel identifier (VPI / VCI) processing unit, the predetermined reserved mode in which the virtual path identifier (VPI) and virtual channel identifier (VCI) required by the dedicated line of the requested reservation mode are registered in the database. Checking whether it is already assigned to the leased line, and if the identifier of the newly requested leased line is already allocated to the leased line of the preset reservation mode, the virtual path and virtual channel identifier (VPI / VCI) processing unit is configured to assign the identifier to the preset line. By checking the cycle of the reserved time of the leased line, the newly requested reservation time becomes inactive. Sharing the virtual path identifier and the virtual channel identifier (VPI / VCI) of the preset leased line to the dedicated line of the newly requested reserved mode when included in the time; and sharing the virtual path identifier and the virtual channel identifier (VPI / VCI). After allocating the bandwidth, the bandwidth processing unit checks the leased line bandwidth (BW) of the preset reserved mode registered in the database to determine whether it is possible to allocate the leased line bandwidth (BW) of the newly requested reserved mode from the bandwidth of the preset leased line. In step S, if the bandwidth of the newly requested reservation mode is allocated in the bandwidth BW of the predetermined lease line, the bandwidth processing unit may check the reservation time of the predetermined lease line corresponding to the bandwidth BW and request a new request. Reserved line bandwidth of newly requested reserved mode when the reserved time of the reserved lease line is included in the inactive time of the preset leased line of bandwidth (BW) Allocating at the bandwidth BW of the predetermined leased line, and after allocating the bandwidth BW, the routing setting unit includes routing information and automatically connecting the called party and the caller's subscriber board to the leased line. A dedicated line resource sharing method of an asynchronous delivery mode switch is provided.

1 is a simplified system configuration diagram for explaining a leased line resource sharing method of an asynchronous delivery mode switch of the present invention;

2 is a flowchart sequentially illustrating a method for sharing leased line resources in an asynchronous delivery mode switch according to the present invention;

<Description of the code | symbol about the principal part of drawing>

1: Asynchronous Transfer Mode Exchange

10: virtual access control unit

20, 30: calling party and called party subscriber board

40: connection switch

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a simple system configuration diagram for explaining a method for sharing a leased line resource of an asynchronous delivery mode switch according to the present invention.

Referring to FIG. 1, the general asynchronous delivery mode switch 1 structure is constructed as follows. Namely, a semi-permanent point-to-point virtual connection control software block (SPVCF) 10 such as point-to-point, originating and destination subscriber boards 20 and 30, and a connection switch 40 It consists of.

Here, the virtual access control software unit 10 is the MMC processing unit 11, VPI / VCI processing unit 12, bandwidth (BW) processing unit 13, DB processing unit 14, database (DB) 15, path And a setting unit / result message output unit 16.

At this time, the MMC processing unit 11 receives an operator command (MMC: Man Machine Command) including a reserved line setting (PVC) of the reservation mode from the operator terminal to check the MMC parameters to determine whether the MMC conditions are correct.

The Virtual Path Identifier (VPI) / Virtual Channel Identifier (VCI) processing unit 12 allocates the VPI / VCI requested by the operator.

The bandwidth processor 13 allocates the bandwidth requested from the operator, using the bandwidth allocation table of the database 15.

The database 15 stores the information data (VPI / VCI, bandwidth, reservation time, etc.) of the leased line set by the operator.

The DB processing unit 14 manages the database 15 and processes the data.

The route setting unit / result message output unit 16 adds routing related information according to the connection paths of the calling party and the called party subscriber boards 20 and 30 to the information provided from the VPI / VCI processing unit 12, and / Output the result of setting the leased line.

2 is a flowchart sequentially illustrating a method for sharing leased line resources in an asynchronous delivery mode switch according to the present invention.

1 and 2, a dedicated line resource sharing method of an asynchronous delivery mode switch according to the present invention is as follows.

The MMC processing unit 11 receives an MMC including a reserved line setting (PVC) request signal from the operator terminal (S10) (S10) and checks the parameter condition of this command (S12) to determine whether the MMC condition is correct.

After checking the MMC in the MMC processing unit 11, the Virtual Path Identifier (VPI) / Virtual Channel Identifier (VCI) processing unit 12 allocates the VPI / VCI required by the PVC of the MMC, which is the same identifier as the VPI / VCI. If is already used in a dedicated leased line determines whether the resources (VPI / VCI) can be shared.

Accordingly, the VPI / VCI processing unit 12 first checks whether the virtual path and channel identifier (VPI / VCI) of the newly requested leased line in the PVC are allocated to the leased line in the preset reservation mode registered in the database 15 (S14). .

As a result of the check, if the VPI / VCI of the reserved line of the newly requested reservation mode is already allocated to the dedicated line of the preset reservation mode in the MMC processing unit 11, the VPI / VCI processing unit 12 may share the VPI / VCI resources of the dedicated line. In order to determine whether it is possible, the VPI / VCI requested by the PVC checks the period of the reserved time of the reserved line already allocated (S18).

As a result of checking in step S18, when the reservation time of the new lease line requested by the PVC is included in the inactive time of the preset lease line, the VPI / VCI processing unit 12 shares the VPI / VCI of the new lease line with the VPI / VCI of the preset lease line. (S19) As described above, since the allocated VPI / VCI is not used while the dedicated lease line is inactivated, the VPI / VCI of the preset leased line can be shared and allocated to the newly requested lease line at this inactive time. At this time, in order to share the VPI / VCI, the reserved time (including active / inactive period) of the new leased line or the active time of the new leased line must be included while the predetermined leased line is deactivated.

However, if the VPI / VCI of the new leased line is not assigned to the leased line of the preset reservation mode in step S14, the VPI / VCI processing unit 12 allocates the VPI / VCI requested by the PVC as in the prior art (S16). As a result of checking in step S18, when the reservation time of the newly requested leased line is not included in the inactive time of the preset leased line, the VPI / VCI processing unit 12 notifies the operator that it is impossible to set the leased line in the newly requested reservation mode. (S24) Here, the reason that the VPI / VCI of the preset dedicated line cannot be shared and used when the new dedicated line is set is that the preset dedicated line becomes active time and already uses VPI / VCI.

After allocating the VPI / VCI in step S19, the bandwidth processor 13 allocates the bandwidth requested by the PVC. Conventionally, the bandwidth is allocated using the bandwidth allocation table of the database 15. However, the present invention shares the bandwidth of the new lease line requested by the PVC when the bandwidth of the predetermined lease line of the database 15 can be allocated. Allocates bandwidth as conventionally.

Accordingly, the bandwidth processor 13 calculates the bandwidth (BW) of the new leased line requested by the PVC, and determines whether the bandwidth of the newly requested reserved mode leased line can be allocated among the reserved line bandwidths of the preset reserved mode registered in the database 15. Determine (S20). As a result, when the bandwidth of the newly requested reserved mode leased line can be allocated among the reserved line bandwidths of the preset reserved mode, it is determined whether the bandwidth sharing between the leased lines is possible by checking the reservation time of the predetermined leased line of the corresponding bandwidth (S22). .

If the reserved time (total period or activation time) of the newly requested leased line is included in the inactive time of the preset leased line that can allocate bandwidth, the bandwidth processing unit 13 determines the leased line bandwidth of the newly requested reserved mode from the bandwidth of the preset leased line. (S26) The sharing of the bandwidth of the predetermined leased line and the new leased line may be used as another leased line resource because the bandwidth resource is not used at the time when the predetermined leased line is deactivated.

However, if the bandwidth of the newly requested reserved mode dedicated line cannot be allocated among the reserved line bandwidth of the reserved mode preset in step S20, the bandwidth is allocated using the bandwidth allocation table of the database 15 as in the prior art (S28).

If the reserved time (inactivity / active period, activation) of the new leased line is not included within the inactive time of the preset leased line that can allocate bandwidth to the new leased line in step S22, the bandwidth processing unit 13 adds the leased line of the newly requested reserved mode. The operator is notified that the setting is impossible. (S24) The reason why the setting of the new leased line is impossible is that the bandwidth of the new leased line cannot be shared by the bandwidth of the preset leased line because the bandwidth is used during the active time of the preset leased line. .

After allocating the bandwidth of the leased line in this way, the route setting unit / result message output unit 16 transmits the information provided from the VPI / VCI processing unit 12 according to the connection paths of the calling party and the called party subscriber boards 20 and 30. Routing-related information is added (S30) and the dedicated line setting result is output (S32).

On the other hand, the database 15 that is not described is to store the information data (VPI / VCI, bandwidth, reservation time, etc.) of the dedicated line set by the operator, the DB processing unit 14 manages the database 15 and the data Process.

As described above, the present invention connects the subscriber board of the called party and the caller to the dedicated line of the reservation mode, while the resources (VPI / VCI, bandwidth) of the corresponding reserved line are reserved while the dedicated line of the preset reservation mode is inactive. Can be shared as a resource. Accordingly, the present invention can share resources with other leased lines during a period when the leased line is inactive without allocating resources for all leased lines in all reservation modes, thereby enabling efficient use of resources.

On the other hand, the present invention is not limited to the above-described embodiment, various modifications are possible by those skilled in the art within the spirit and scope of the present invention described in the claims to be described later.

Claims (3)

In the reserved mode dedicated line setting method of the asynchronous delivery mode switch, Receiving an operator command in a reserved mode from an operator command processor to check an operator condition; If there is a dedicated line setting of the new reserved mode in the operator condition, the virtual path and virtual channel identifier processing unit is configured to register the reserved route of the preset reserved mode in which the virtual path identifier and the virtual channel identifier required by the reserved line of the requested reserved mode are registered in the database. Checking whether it has already been assigned; If the identifier of the newly requested leased line has already been allocated to the leased line in the preset reservation mode, the virtual path and virtual channel identifier processing unit checks the period of the reservation time of the preset leased line to which the identifier is assigned and the newly requested reservation time is set. Sharing the virtual path identifier and the virtual channel identifier of the preset leased line with the leased line of the newly requested reservation mode when the inactive time of the preset leased line is included; After sharing and allocating the virtual path identifier and the virtual channel identifier, the bandwidth processing unit checks the leased line bandwidth of the preset reserved mode registered in the database to determine the leased line bandwidth of the newly requested reserved mode in the bandwidth of the preset leased line. Determining if assignable; If the dedicated line bandwidth of the newly requested reservation mode is assignable from the bandwidth of the preset leased line, the bandwidth processing unit checks the reservation time of the preset leased line corresponding to the bandwidth so that the reservation time of the newly requested leased line is the bandwidth. Allocating a dedicated line bandwidth of the newly requested reserved mode in the bandwidth of the preset leased line when included in the inactive time of the preset leased line; And After allocating the bandwidth, the route setting unit adds routing information and automatically connects the called party and the calling party's subscriber board to the leased line. 2. The operator of claim 1, wherein the virtual path and virtual channel identifier processing unit cannot set the leased line of the newly requested reserved mode when the reservation time of the newly requested leased line is not included in the inactive time of the preset leased line. Delivering to; The bandwidth processing unit may further include allocating a newly allocated reserved line bandwidth of the newly requested reserved mode when the reserved time of the newly requested leased line is not included within the inactive time of the leased line of the bandwidth. Method of sharing leased line resources of an exchange. According to claim 1, If the reservation time of the newly requested leased line is included in the inactive time of the predetermined leased line, the entire reservation time of the newly requested leased line is in the inactive time of the predetermined leased line, or the new request And a leased line resource sharing method of an asynchronous delivery mode switch, characterized in that an active time of a reserved leased line reservation time is within an inactive time of the predetermined leased line.