KR101001508B1 - Method for rerouting by manual connection of ATM network - Google Patents

Abstract

The present invention relates to a method for reconfiguring a path of a trail, which is an end-to-end connection in an asynchronous transfer mode (ATM) high-speed communication network constructed in a hierarchical structure, to an arbitrary path or a path designated by an operator.

To this end, the present invention compares the current path and the reset path (new path) with respect to the connection state of a specific trail, and deletes or generates only the connection information for the changed portion, thereby changing only the connection state of some sections of the specific trail. Minimize to improve network stability.

Description

Method for rerouting by manual connection of ATM network in asynchronous transmission mode high speed network

1 is a block diagram of a general asynchronous transmission mode high speed communication network.

2 is a diagram illustrating a virtual path trail of a typical asynchronous transmission mode high speed communication network.

3 is a block diagram of an apparatus to which a manual rerouting method is applied in an asynchronous transmission mode ultra high speed communication network according to an embodiment of the present invention.

4A and 4B are flowcharts illustrating a manual rerouting method in an asynchronous transmission mode high speed communication network according to an embodiment of the present invention.

The present invention relates to a manual rerouting method in an asynchronous transfer mode ultra high speed network, and more particularly, to a path of a trail, which is an end-to-end connection in an asynchronous transfer mode (ATM) ultra high speed communication network constructed in a hierarchical structure. It relates to a method of resetting an arbitrary path or a path designated by an operator.

As shown in FIG. 1, the asynchronous transmission mode ultra high speed communication network is composed of a virtual path (VP) layer network 10 and a virtual channel serving as a client of the virtual path layer network 10. Channel) layer 20, the virtual path layer network 10 and the virtual channel layer network 20 has a server / client relationship. Each layer network consists of several subnetwork (SNW), and each subnetwork consists of several nodes.

Nodes in a network management system refer to physical exchanges. Each node is connected by a link. One end-to-end connection of each hierarchical network unit consists of several connections of each node. In this case, the connection of the hierarchical network unit is called a trail and the connection of the node unit is called a cross connection (XC).

The trail may be divided into a virtual path trail (VP Trail) generated in the virtual path layer network and a virtual channel trail (VC Trail) generated in the virtual channel layer network.

The virtual path trail is an end-to-end VP trail (end-to-end VP trail in FIG. 2) terminated at the end-to-end of the network and the network in-house virtual terminated inside the network as shown in FIG. There are a path trail (Internal VP Trail (FIG. 2), and a network endpoint and a semi-internal VP Trail (FIG. 2) that terminates inside the network. Intra-network virtual path trails and partial intra-virtual path trails are terminated within the network by either one of the trail endpoints or by a bipedal endpoint, and these trails are referred to as VP Trail Termination Points (vpTTPs).                         

The virtual channel trail is a connection or frame relay between the end-to-end VC Trail (FR) and Frame Relay (FR) interlocking ports, which are connections between asynchronous transfer mode ports, depending on the nature of the ports that are terminated in the connection. It may be divided into a frame relay interworking VC Trail, which is a connection between an interworking port and an asynchronous transmission mode port.

A cross-connection, a node-by-node connection, contains the bandwidth information of a connection and the sending and receiving endpoint information of the connection. Both ends of the cross connection are composed of different ports in one node, exist in the virtual path layer network, and constitute a virtual path trail. The end point of the virtual path cross connection (VP XC) becomes a virtual path connection termination point (VP CTP) and is divided into a virtual path identifier (VPI) in the corresponding port. The end point of the virtual channel cross connection (VC XC) that exists in the virtual channel layer network and constitutes the virtual channel trail is a virtual channel connection termination point (VC CTP). It is divided into a virtual channel identifier (VCI) in the port.

On the other hand, as new networks are configured in the high-speed information communication network, or network shapes are changed, such as demolition of old exchanges or creation and deletion of links, frequent operations such as deleting and re-creating the existing connection, that is, trails, occur frequently. Done. However, deleting and re-creating trails, which are end-to-end connections, may cause a heavy load on the network management system and the exchange management system as the connection information of some sections is changed on trails passing through multiple exchanges (nodes).

Therefore, in the high-speed information communication network management system, a function of deleting and re-creating only a connection of a corresponding section according to the operator's requirements for a trail in which the above partial connection work occurs or according to the operator's request in case the trail fails. It is required to delete and recreate only the connection of the fault zone by selecting from the network management system without finding a specific connection path, that is, manual rerouting function.

Accordingly, the present invention has been made to solve the above-described conventional problems, and an object of the present invention is to change the path of the trail by changing the connection information of some sections when the path of the trail is reset at the request of the operator. To ensure that

In order to achieve the above object, the manual rerouting method in the asynchronous transmission mode ultra-high speed communication network according to the present invention comprises the steps of extracting the current path of the trail from the network configuration information DB when a redirection to a specific trail is required from an operator. 1 course; A second process of extracting different connection points by comparing the new route for rerouting with the current route; Deleting a connection point existing only in the current path from the path of the trail, and creating a connection point existing only in the new path in the path of the trail; And a fourth process of aligning the generated connection point with respect to the transmission / reception point of the trail to generate a redirection result for the trail, and storing the generated redirection result in the network configuration information DB. .

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail.

3 is a schematic block diagram of a manual rerouting system in an asynchronous transmission mode ultra high speed communication network according to an embodiment of the present invention.

As illustrated in FIG. 3, a manual rerouting system in an asynchronous transmission mode ultra high speed communication network according to an embodiment of the present invention includes a trail constituting an ATM network based on an operator's input input through an operator GUI 10. Network management system 20 for managing the connection state of the; Under the control of the network management system 20 is provided with an adapter 30 for applying the changed state of the connection information of the trail to the switch (40).

Network management system 20 is the connection information of all elements constituting the ATM network For example, the network configuration information DB 21 stores the transmission / reception point information of the trail as shown in <Table 1> and the transmission / reception point information of the cross-connect as shown in <Table 2> or the virtual path trail endpoint information; The network configuration information DB 21 is used to provide the operator GUI 10 with the result of the connection information inquiry requested from the operator GUI 10, and for the connection information valid when the connection information of a specific trail is changed by the operator. It is provided with a connection management device 22 for performing the overall function of resetting the path reflected.

TABLE 1

Trail identifier Send node Send port Receiving node Receiving port One A A D 3

TABLE 2

Node Send port Receiving port Upper trail
Identifier Order within the trail A One 2 One One B One 2 One 2 C One 3 One 3

When the connection management device 22 receives a request for inquiring the current path for a specific trail from the operator GUI 10, the network management information 22 extracts all network definition information belonging to the trail from the network configuration information DB 21 and routes the trail. The information is transmitted to the operator GUI 10. Here, the operator inputs a port number, VPI, VCI, etc. constituting the corresponding trail through the GUI 10, and designates a trail to be a route inquiry target. The connection management device 22 extracts the network configuration information from the network configuration information DB 21 by using the port number, VPI, and VCI input from the operator. The extracted network configuration information is XC corresponding to the connection point of the trail. And vpTTP.

After receiving the path information of the trail, the operator deletes or changes the path information of the corresponding trail in consideration of the network situation, generates the path information of the new trail, and then uses the connection management device of the network management system 20 to generate the path information of the generated trail. (22) may be requested to reset the path, and the path information of the trail to be added to the connection management device 22 of the network management system 20 may be requested to reset the path regardless of the path information of the trail. have.

In addition, the connection management device 22 automatically resets the path for the corresponding trail when a failure of a particular trail is notified from the operator GUI 10.                     

Hereinafter, a manual rerouting method in an asynchronous transmission mode ultra high speed communication network according to an embodiment of the present invention will be described in detail with reference to the flowcharts shown in FIGS. 4A and 4B.

When a request for resetting a specific trail is requested from the operator through the operator GUI 10 (S2), the connection management apparatus 22 of the network management system 20 receives the current path of the trail from the network configuration information DB 21. After extraction (S4), it is determined whether a new route for resetting the route is input from the operator (S6).

As a result of the determination, when the state in which the new path is input by the operator is confirmed (Yes in S6), the connection management device 22 checks whether the new path is correct based on the path information stored in the network configuration information DB 21. (S8).

As a result of the check, if it is confirmed that the new route is not correct (No in S8), an error message is transmitted to the operator GUI 10 side. In this case, the new path is not correct when the new path itself is not correct as shown in Table 3 or where the new path and the existing path do not match as shown in Table 4.

TABLE 3

Node A A B B B C C D D port One 2 One 2 3 One 2 2 3

TABLE 4

Node C C D D port 3 2 2 4

On the contrary, if the determination in step S8 confirms that the new path is correct (Yes in S8), the XC or vpTTP to be deleted is compared by comparing the current path extracted from the network configuration DB 21 and the new path input from the operator. After extraction (S12), the XC or vpTTP to be generated by comparing the new path with the current path is extracted (S14).

Examples of cases where the new route is correct are shown in Table 5.

TABLE 5

Node A A B B C C D D port One 2 One 3 One 2 2 3

Meanwhile, XC extracted at S14 is a cross connection corresponding to a node-by-node connection, and vpTTP is an endpoint of a virtual path trail existing at the node. Both XC and vpTTP exist in the partial intra virtual path trail and in-network virtual path trail via 3 or more nodes, and only XC exists through the network end-to-end trail, and in-network trail through 2 nodes Via vpTTP only.

As a result of the extraction, if the extracted XC or vpTTP exists (Yes in S16), the VPI or VCI is allocated to the XC or vpTTP extracted in S14, respectively (S18), and the XC or vpTTP extracted in S12 in the path of the trail. After the deletion, the delete command for the XC or vpTTP is transmitted to the adapter 30 to return all ports and links of the corresponding exchanges 40 related to the bandwidth of the XC or vpTTP (S20).

Thereafter, the connection management device 22 determines whether the ATM connection is changed to the FR-linked connection due to the change of the end port of the network connection (S16), and if the ATM connection is changed to the FR-linked connection (Yes in S22). The information value according to the FR linkage is calculated according to the B-ICI (B-ISDN Inter Carrier Interface) standard of the ATM Forum, which is an international standard for technology (S24).

If the ATM connection is not changed to the FR-linked connection (No in S22) and the FR linking information value is calculated through S24, the XC or vpTTP generation command extracted in S14 is transferred to the adapter 30, and the XC Alternatively, bandwidth is secured from a port and a link through vpTTP (S26).

Subsequently, the connection management device 22 arranges the XC or vpTTP and the XC or vpTTP belonging to the current path in order from the transmission point to the reception point of the trail. The transmission / reception endpoint information or trail type of the trail is changed to match the reset information and stored in the network configuration information DB 21 (S30). The trailing send and receive endpoint may be the case where the endpoint is changed to a different port, and when the trail type is changed, the trail type is changed from an internal network trail to a partial network internal trail or the end-to-end virtual channel trail as the trail is reset. This may correspond to a case of changing from the frame relay interworking virtual channel trail to.

On the other hand, if the input of the new path is not determined at S6 (No at S6), and if there is no XC or vpTTP extracted at S16, the connection management device 22 is connected to a specific transmission / reception point by a routing module (not shown). By requesting the reset paths for the, N reset paths are transmitted from the routing module (S32).                     

 The connection management device 22 designates the first reset path among the N reset paths as a new path (S34), extracts an XC or vpTTP to be deleted by comparing the current path with the new path (S36), and the new path and the current path. The XC or vpTTP to be generated by comparing the paths is extracted (S38).

In this case, if the extracted XC or vpTTP does not exist (No in S40), check whether there is a further reset path (S42), and then specify the next reset path as a new path (S44), and then proceed to S36 to S36 to S42 described above. Perform iteratively.

On the other hand, if the check result reset path in S42 does not exist (No in S42) sends an error message to the operator GUI (10) and ends the manual rerouting process according to the present invention (S46).

According to the present invention as described above, when rerouting in an asynchronous transmission mode network, the path generation is performed only for the changed path and the previous path is maintained for the unchanged path, thereby minimizing service disconnection. In this regard, the network operation can be expected to be stabilized and efficient, and network service providers can expect to provide more connected services.

On the other hand, the present invention is not limited to the above-described embodiment, but can be modified and modified within the scope not departing from the gist of the present invention, such modifications and changes should be regarded as belonging to the following claims. will be.

Claims (8)

A first step of extracting a current path of the trail from a network configuration information DB when a path resetting for a specific trail is requested from an operator; A second process of extracting different connection points by comparing the new route for rerouting with the current route; Deleting a connection point existing only in the current path from the path of the trail, and creating a connection point existing only in the new path in the path of the trail; And And a fourth process of aligning the generated connection point with respect to the transmission / reception point of the trail to generate a rerouting result for the trail, and storing the generated rerouting result in the network configuration information DB. Manual rerouting method in transmission mode high speed network. The method of claim 1, wherein in the first process The new path is a manual route resetting method in the asynchronous transmission mode high-speed communication network, characterized in that the input from the operator. The method of claim 2, And if the new path is not input from the operator, one or more reset paths for the trail are transmitted from a routing module. The method of claim 3, wherein in the second process In the asynchronous transmission mode ultra-high speed network, characterized in that further comprising the step of requesting at least one reset path for the upper trail to the routing module, if there is no different connection point as a result of the comparison of the new path and the current path. Manual rerouting method. The method according to claim 3 or 4, If the second to third processes are performed by defining the first reset path among the reset paths received from the routing module as the new path, and a comparison point between the new path and the current path does not exist, the next sequence And reconfiguring the reset path as a new path, and repeatedly performing the second to third processes. The method of claim 1, wherein in the third process The connection point is at least one or more of a cross connection (XC) and a virtual path trail termination point (vpTTP). The method of claim 1, wherein the path generation of the trail in the third process is performed. Allocating at least one of a VPI and a VCI for a connection point existing only in the new path; And a second step of securing resources for the equipment associated with the connection point. A first step of extracting a current path of the trail from a network configuration information DB when an operator is notified of a failure for a specific trail;  A second step of extracting different connection points by comparing the reset path received from the routing block with the current path; Deleting a connection point existing only in the current path from the path of the trail and creating a connection point existing only in the reset path in the path of the trail; And And a fourth process of aligning the generated connection point with respect to the transmission / reception point of the trail to generate a rerouting result for the trail, and storing the generated rerouting result in the network configuration information DB. Manual rerouting method in transmission mode high speed network.

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