KR20020055956A - Method for source management of ATM interface module - Google Patents

Abstract

PURPOSE: A resources management method in an ATM interface apparatus is provided to separate resources of an ATM interface device by services, thereby capable of managing the resources effectively. CONSTITUTION: VPI(Virtual Path Identifier) resources is separated according to the kinds of service, so that a port is produced(ST10). Data is transmitted and received by using the separated port(ST20). An ATM(Asynchronous Transfer Mode) interface unit is separated into a physical port and a logical port. The physical port means a port for managing the whole VPI resources. The logical port means is a port produced by an allocation of a part region of VPI resources within the physical port. The ports in the ATM interface unit are used independently each other.

Description

Resource management method of ATM interface device {Method for source management of ATM interface module}

The present invention relates to a resource management method of an ATM (Asynchronous Transfer Mode) interface device, and more particularly, to resource management of an ATM interface device by dividing the resources of the ATM interface device into services for efficient resource management. It is about a method.

In general, asynchronous transmission mode (ATM) is determined by ITU-T (formerly CCITT) as a transmission method of B-ISDN (broadband ISDN) in 1988, and is a core transmission and switching technology of B-ISDN. This method divides all information into fixed length blocks called ATM cells and transmits them sequentially.

The ATM cell is 53 bytes, of which the header is 5 bytes, the information field is 48 bytes, and the data stream of fixed size as described above becomes a unit of multi-switching.

The header contains a Virtual Channel Identifier (VCI) for identifying the connection to which the cell belongs, a Virtual Path Identifier (VPI), and a Cell Loss Priority indicating whether the cell should be discarded during congestion. , CLP), cell information identification (Payload Type, PT) for distinguishing network control information, header error detection and control (Header Error Control, HEC), and the like. The characteristic of ATM multiplexing is that multiplexing efficiency higher than L division can be achieved by statistical multiplexing, and the transmission band allocated to individual communication can be freely set.

In the ATM exchange, since the routine information is stored in the header, each ATM exchanger can independently relay and exchange cells, and the exchange processing can be realized in hardware, thereby improving the exchange speed.

The ATM switching network is composed of two levels of networks called virtual path (VP) and virtual channel (VC). As described above, ATM inherits high transmission efficiency of packet switching and corrects a decrease in switching delay line use efficiency, which is a disadvantage of circuit switching, so that various information can be processed at high speed.

Hereinafter, a resource management method of a conventional ATM interface device will be described with reference to the accompanying drawings.

1 is a block diagram including a general ATM interface device.

In the figure, reference numeral 10 is an ATM switch, 20 is a processor, 30 is a switch, and 40 is an ATM interface unit.

The ATM interface 40 refers to a relay line board connected to an ATM subscriber board and another switch, and may be represented by one link connected using an optical cable.

The ATM switch 10 uses an identifier (ID) to use the ATM interface unit 40, which is a physical interface module.

In the conventional method, the software block directly uses the ID of the physical ATM interface unit 40.

The software block may process signaling, a permanent virtual channel (PVC) function, a soft PVC function, and the like with one ID representing the ATM interface unit 40.

For example, in order for a software block to service a Q2931 function of a user-network interface (UN) in a subscriber ATM interface unit 40, the software block may register and service the Q2931 protocol in a software block that performs a signaling function. Can be.

As another example, a software block may be routed to provide a relay network interface (PNNI) private function of a network to network interface (NNI) to a relay ATM interface unit 40. The PNNI protocol can be registered and serviced in the software block that performs the function.

However, there are various problems that may occur when the software block directly uses the ID of the physical ATM interface unit 40.

For example, there is a problem that it is difficult to manage the VPI, VCI resources of the operator by allocating VPI, VCI, which is a resource of the ATM interface unit 40 without service classification.

In addition, FIG. 2 is a diagram illustrating an example of a PNNI call failure due to a VPI mismatch in a conventional ATM interface device. As can be seen, when another router and an ATM interface unit 40 are connected to each other to operate a routing protocol, FIG. When the Permanent Virtual Circuit Connection (PVC) or the Soft Permanent Virtual Circuit Connection (PVCC) is set to only one ATM interface unit 40 of the exchange, it may be impossible to signal using a routing protocol.

Another problem is that the function that can be serviced by one ATM interface unit 40 is limited to one. There is a disadvantage that the use of an ID representing the system shape, and because it represents the entire VPI and VCI, makes it impossible to use multiple protocol functions in one ATM interface unit 40.

For example, at some ATM interfaces, the PNNI and B-ISUP (Broadband ISDN User Part) protocols cannot be used as routing protocols.

Accordingly, the present invention has been proposed to solve the above-mentioned conventional problems, and an object of the present invention is to divide a resource of an ATM interface device into services and efficiently manage a resource of an ATM interface device. To provide.

Resource management method of the ATM interface apparatus according to an embodiment of the present invention to achieve the above object,

Generating a port by dividing the VPI resource according to a type of service; And a second step of transmitting and receiving data using the port divided in the first step.

1 is a block diagram including a general ATM interface device,

2 is a diagram illustrating an example of a PNNI call failure due to a VPI resource mismatch in a conventional ATM interface device.

3 is a flowchart illustrating a resource management method of an ATM interface device according to the present invention;

4 is a diagram of an ATM interface device divided into logical ports by FIG. 3,

FIG. 5 is a diagram illustrating an example in which a logical port is divided by FIG. 3 and applied in actual use.

Explanation of symbols on the main parts of the drawings

10: ATM exchanger 20: processor

30: switch 40: ATM interface unit

Hereinafter, an embodiment according to the present invention, a technical concept of a resource management method of an ATM interface device will be described with reference to the accompanying drawings.

3 is a flowchart illustrating a resource management method of an ATM interface device according to the present invention, FIG. 4 is a diagram of an ATM interface device divided into logical ports by FIG. 3, and FIG. 5. 3 is a diagram illustrating an example in which a logical port is divided by FIG. 3 and applied in actual use.

As shown therein, a first step (ST10) of generating a port by dividing the VPI resources according to the type of service; And a second step ST20 for transmitting and receiving data using the port divided in the first step.

The operation of the resource management method of the ATM interface apparatus according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, the present invention uses the concept of a port allocated for each VPI region without using an ID representing physical shape information of the ATM interface unit 40 in a software block for performing a service.

As shown in FIG. 4, in the present invention, the ATM interface unit 40 is divided into a physical port and a logical port. The physical port refers to a port that manages the entire VPI resource, and the logical port refers to a port that is created by allocating a portion of the VPI resource within the physical port.

By the VPI-specific port classification, ports existing in one ATM interface unit 40 may be used independently of each other.

Therefore, the VPI resources of the ATM interface unit 40 representing the system shape are created in the software block according to the type of service to create a port.

Referring to FIG. 5, the physical port portion having the VPI region of 0 to 4095 in the ATM interface 40 shows an example of performing a PNNI routing service, a Multi Protocol Label Switching (MPLS) service, and a PVCC service. Thus, logical ports with VPI areas 0-4095 allow PNNI routing services to be performed, logical port MPLS services with 1000-3999 VPI areas are performed, and logical ports with 4000-4095 VPI areas are allocated for PVCC services. Do it.

Therefore, it is possible to use a port, which is abstract information for each VPI area, in a software block instead of directly using information representing a system shape. You can make an effect.

In addition, by dividing the VPI by service, the operator can easily determine whether the VPI is used or not, and thus, it has the advantage of facilitating management, and it is possible to perform multiple services in one ATM interface unit. There is also an advantage.

In addition, the VPI used by SVCC or PVCC can be divided into different ports to solve the problem of VPI / VCI resource mismatch in SVCC using PNNI or B-ISUP routing protocol.

Furthermore, in case of accommodating multiple subscribers in one ATM interface using a cross connector, there is an advantage of facilitating VPI / VCI resource management by allocating subscribers per port by using port division method. .

As described above, the present invention divides resources of an ATM interface device into services to efficiently manage resources.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the resource management method of the ATM interface device according to the present invention can effectively manage the resources by dividing the resources of the ATM interface device for each service.

In addition, the present invention can produce the same effect as using one ATM interface unit, several ATM interface unit, the operator can easily determine whether the VPI use and nonuse, easy to manage, one ATM There is also an advantage that several services can be provided in the interface unit.

In addition, the present invention can solve the problem of inconsistency of VPI / VCI resources in SVCC using PNNI or B-ISUP routing protocol, and in order to accommodate multiple subscribers in one ATM interface unit, VPI / It also has the effect of facilitating VCI resource management.

Claims (1)

Generating a port by dividing the VPI resource according to a type of service; And a second step of transmitting / receiving data by using the port divided in the first step.