KR19990061246A - Connection Resource Allocation Method of Asynchronous Transfer Mode Switch Using Connection Priority - Google Patents

Abstract

According to the present invention, when one resource defined in an asynchronous transfer mode switch is used in two different connections (PVC / SVC) or when another connection type is already in use, priority is given to the connection type to further allocate resources. It is about a method to use efficiently.

In a preferred embodiment of the method for allocating a connection resource of an asynchronous transmission mode switch using a connection priority according to the present invention, receiving a new connection resource allocation request from a PVCM or SVCM, and whether the requested resource is already used in another connection. Determining whether or not, determining the connection priority according to the result of the check, and permitting the use of the requested resource according to the connection priority.

According to the present invention, there is a different connection type (permanent virtual connection or switch virtual connection) in an asynchronous transmission mode switch, so that connection failures caused by resource inconsistency in a call connection request are allocated according to priority in connection request. By doing so, it is possible to increase the success rate of call connection and to use resources efficiently.

Description

Connection Resource Allocation Method of Asynchronous Transfer Mode Switch Using Connection Priority

The present invention relates to a method for allocating a connection resource of an asynchronous transmission mode (ATM) switch using a connection priority, and is particularly limited to one of the ATM switching system. When you want to use a resource on two connections with different Connection Types (Permanent Virtual Connection (PVC) and Switched Virtual Connection (SVC)) or if another connection type is already in use. The present invention relates to a connection resource allocation method of an asynchronous transmission mode switch that uses resources efficiently by assigning priority to types.

In general, an asynchronous transfer mode switching system (ATM exchange) is a call connection type for providing a service to a large number of subscribers (ATM end users), there are two methods of permanent virtual connection and switched virtual connection.

Permanent virtual access (PVC) is a static connection that transfers the call connection request from the network management system (NMS) that manages the network to the lower asynchronous transfer mode switching system and connects between the desired ATM end users. It is a method, and keeps the connection continuously for a long time unless the network management system requires the release.

Switch virtual access (SVC) is a connection between subscribers and exchanges or exchanges and exchanges of message protocols, which are signals specified by the ITU-T or asynchronous transmission mode forums, in order to use limited network resources more efficiently. It is a dynamic way to connect and disconnect each other's needs whenever needed.

There may be various resources of the asynchronous transfer mode switching system required for the connection of a permanent virtual connection or a switch virtual connection, but the most important resource is a virtual pass identifier (VPI) / virtual channel identifier (VRT). VCI). Virtual path identifier / virtual channel identifier values are required when transferring user calls in an asynchronous transmission mode network. The virtual path identifier / virtual channel identifier value is requested from an administrator (network management system) when requesting a permanent virtual access connection, and is assigned internally within the asynchronous transmission mode switching system when requesting a connection of a switch virtual contact. It was an unreasonable way to wait for two connections to proceed at the same time, or if they were already using the desired virtual path identifier / virtual channel identifier value in the connection of the switch virtual connection. In addition, in the asynchronous transmission mode switch, the permanent virtual connection / switch virtual connection may use a predetermined range of virtual path identifier / virtual channel identifier values in advance, but this causes a problem in that the use of the user's call is restricted.

Accordingly, the present invention has been devised to solve the above problems, and is one resource (virtual path identifier / virtual channel identifier) when attempting to connect a permanent virtual connection and a switch virtual connection in a conventional asynchronous transfer mode switching system. The purpose of this study is to provide a method for resolving a resource urge when a duplicate request occurs for a resource request, thereby enabling a natural service.

In other words, in the persistent virtual access and switch virtual access call control of the conventional asynchronous transfer mode switching system, a collision occurs when one resource (virtual path identifier / virtual channel identifier) that is required in two different types of connections is used. In the management system or subscriber board configuration or by the subscriber asynchronous transmission mode address prioritize the connection to resolve resource conflicts between the connections.

1 is a software block diagram in accordance with the present invention.

2 is a software flow diagram in accordance with the present invention.

One preferred embodiment of a method for allocating a connection resource of an asynchronous transmission mode switch using the connection priority according to the present invention, which is designed to achieve the above object,

A first step of receiving a new connection resource allocation request from PVCM or SVCM;

A second step of confirming whether the requested resource is already used in another connection;

Determining a connection priority according to the checking result; And

And a fourth step of authorizing the use of the requested resource according to the connection priority.

In the present invention, as a result of checking whether the requested resource is already used in another connection, it is preferable to permit the use of the resource when the requested connection is not being used in the other connection.

As a result of checking whether the requested resource is already used in another connection, if the requested resource is in use in another connection, the priority of the new connection resource and the priority of the previous connection resource are compared to determine which one of the resources. It is advisable to check if the priority is high,

When the comparison result of the priority is confirmed that the new connection information priority is high, it is preferable to grant the use of the resource to the requesting module,

After allowing the requesting module to use the corresponding resource, it is preferable to request the release of the corresponding resource for the connection module in use.

As a result of comparing and checking the priority, if the new connection information priority is not high or the same, it is preferable to reject the use of the requested resource.

Hereinafter, the operation principle of the present invention with reference to the accompanying drawings in detail as follows.

The software block diagram and the software flow chart for explaining the present invention in detail are as shown in Figs.

1 is a basic software block diagram of the present invention, wherein an SVCM (SVC control manager) is a channel setting request message and a calling end user or called end user from a calling end user through a user-network interface signaling stack. The information element (IE) is analyzed in the channel release request message, and the connection control of the establishment and release donation is performed. The PVC control manager (PVCM) performs the connection establishment request of the permanent virtual connection from the network management system. The CRDriver (Common Resource Driver) performs the function of requesting a specific virtual path identifier / virtual channel identifier value that is an exchange resource or assigning an unused virtual path identifier / virtual channel identifier value in PVCM or SVCM. do. Back Born Connection Protocol (BBCP) is responsible for call connection control between asynchronous transfer mode switch nodes, and Routing Link State Protocol (RLSP) is responsible for obtaining the most optimal and shortest paths to destination end users. Performs the signaling layer 2 stack function of the asynchronous transport mode forum, Q.SAAL performs the signaling layer 2 stack function of the asynchronous transport mode forum, and ATC converts the destination ATM NSAP address from the SVCM into a physical INA ( It converts to Internal Adrress and informs SVCM.

According to the present invention operating as described above, since there are different connection types (PVC and SVC) in the asynchronous transmission mode switch, connection failures caused by resource mismatches in the call connection request, and resources according to the priority of the connection request By allocating, the success rate of call connection can be increased and the resource can be used efficiently.

Claims (15)

A first step of receiving a new connection resource allocation request from PVCM or SVCM; A second step of confirming whether the requested resource is already used in another connection; Determining a connection priority according to the checking result; And And a fourth step of authorizing the use of the requested resource according to the connection priority. The asynchronous transmission of claim 1, wherein the checking of whether the requested resource is already in use on another connection and permitting the use of the resource when the requested connection is not in use on the other connection. How to allocate connection resources for the mode switch. 2. The method of claim 1, wherein as a result of checking whether the requested resource is already used in another connection, if the requested resource is in use in another connection, the priority of the new connection resource is compared with the priority of the previous connection resource. The connection resource allocation method of the asynchronous transmission mode switch using the connection priority to identify which of the resources, the priority of the resource is high. The method of claim 3, wherein when the new connection information priority is high as a result of the comparison of the priorities, the requesting module is allowed to use the corresponding resource. 5. 5. The method of claim 4, wherein the requesting module releases the corresponding resource from the connection module in use after allowing the requesting module to use the corresponding resource. 4. The method of claim 3, wherein if the new connection information priority is not equal to or equal to the result of the comparison of the priorities, the use of the requested resource is rejected. SVCM; PVCM; CRDriver; BBCP; RLSP; Q.93B; Q.SAAL; And a connection resource allocation system of an asynchronous transmission mode switch using connection priority, which is connected to send and receive messages to each other, including ATC. The method of claim 7, wherein the SVCM is a channel installation request message from a calling end user through a UNI signaling stack, a channel installation request message from a calling end user or called end user and a de-clearing request of the calling end user or called end user. The connection resource allocation system of the asynchronous transmission mode switch using the connection priority, performing IE call control of the on and off function by analyzing IE in the message. 8. The system of claim 7, wherein the PVCM is responsible for performing a request for establishing a PVC connection from an NMS. 8. The system of claim 7, wherein the CRDriver performs a function of allocating a specific virtual path identifier / most channel identifier value that is a switch resource in the PVCM or the SVCM. . 8. The system of claim 7, wherein the BBCP is responsible for call connection control between ATM switch nodes. 8. The system of claim 7, wherein the RLSP is responsible for obtaining the most optimal and shortest path to a destination end user. 8. The system of claim 7, wherein the Q.93B performs signaling layer 3 stack function of ATM forum. 8. The system of claim 7, wherein the Q.SAAL performs a signaling layer 2 stack function of an ATM forum. 8. The system of claim 7, wherein the ATC is responsible for converting a destination ATM NSAP address from the SVCM into a physical INA and informing the SVCM.