KR100281093B1 - Self address allocation system of the exchange_ - Google Patents

Abstract

The present invention relates to a self address assignment system of an exchange, and more particularly, to an address assigned to a switching module node of an exchange in an asynchronous transmission mode network without affecting the switch.

The self-addressing system of such an exchange includes a plurality of local switching module nodes, a main switching module node for switching on call processing of subscribers belonging to each local switching module node, and a main switching module for controlling switching of the main switching module node. In the case of assigning a self address to each local switching module node, each local switching module node provides a test cell in which the self address is stored as a main switching module node.

Description

Self-addressing system of exchange

The present invention relates to a system for assigning a self address of an exchange. In particular, when an address is assigned to a switching module node of an exchange in an asynchronous transfer mode (ATM) network, an address can be assigned without affecting the exchange. A self address allocation system of an exchange is provided.

In the asynchronous transmission mode used in the exchange system, a path of any capacity can be set based on a cell of 53 bytes, which is called a virtual path (VP).

The virtual path refers to the logical combination of virtual channels, and the virtual channel refers to the logical unidirectional coupling between link ends carrying an asynchronous transmission mode cell.

The virtual path represents how much capacity (transportable speed) the traffic between transmitting and receiving destinations is, and is a concept for maintaining, managing and expanding a telecommunication network. A device that controls capacity is called a virtual path handler (VPH).

In the asynchronous transmission mode, the virtual channel may establish about 65,000 lines per virtual path.

Specifically, when the virtual channel is set up, the asynchronous transmission mode cell registers the virtual channel number and the destination in the network by a signal (for example, a dial signal) or the like. Distribute to the destination. In this case, a device connecting the virtual channel is called a virtual channel handler (VCH) (or an asynchronous transmission mode switch).

In general, an asynchronous transfer mode switch is composed of several nodes (Central Processor Module node (CPM node), Local Switching Module node (LSM node)), the initialization procedure for each node (self Address assignment) is performed by the central processing unit (CPU) of the exchange.

At this time, a local switching module node other than the main processor module node among the plurality of nodes is a coprocessor module node.

A switching module node of such a general exchange will be described with reference to the accompanying drawings.

1 is a view showing a switching module node of a conventional exchange.

As shown in FIG. 1, the switching module node of the conventional switch is connected to the main processor module node 1 that is responsible for billing calculation, the main processor module node 1, and the global bus. 1st, 2nd ... 15th local switching module nodes 2a (2b) ... (2o) which connect trunk, announcement, conference call, etc., and each said local switching module node 2 ) Consists of 32 subscriber line circuit boards (SLC Boards) (3) directly connected to the subscriber.

At this time, the subscriber line circuit board 3 is shown as an example of the first, second, and third ... 32 subscriber line circuit boards 3a, 3b, 3c, 3af. will be.

That is, the fifteen local switching module nodes 2 connect various trunks, announcements, No. 7 and conference calls in addition to the subscriber line circuit board 3 as described above. ) Is configured to switch.

2 is a diagram illustrating a switching module node of a tree structure in a conventional exchange.

In the initialization of the conventional exchange, the central processing unit has the main processor module node 1 as node 0, and then the first local switching module node 2a as node 1 and the second local switching module node 2b as 2 nodes. The third node, the third local switching module node 2c, the third node, ..., and the fifteenth local switching module node 2a were assigned to the node 15 in order.

In the conventional method of initializing a switch, a method of assigning a self address to a local switching module node is performed when the asynchronous transmission mode switch is configured with a plurality of nodes. It is determined that the method of performing self address allocation generates a test cell from the main processor module node to the local switching module node so that the self address is allocated when the test cell successfully loops back.

This method is used when a node is newly added to the exchange. The test cell is generated by the newly added local switching module node. When the test cell loops back, it is determined that the exchange and the newly added node are correctly connected.

Such a tree-structured prior art switch connects the call processing request generated at each local switching module node 2 as well as the billing calculation at the main processor module node 1.

In the conventional tree switch, the main processor module node not only generates a test cell but also performs a call processing generated at a local switching module node. Therefore, when the main processor module node generates a test cell, call processing should not be performed. There was a problem that a higher protocol was needed, and the status protocol for which the upper protocol was not defined was instructed by the central processing unit to generate a test cell while processing a call processing occurring at a local switching module node to another local switching module node. There was a problem that malfunction is likely to occur when the operation according to the operation.

An object of the present invention is to solve the problems of assigning a self address to a switching module node of a conventional exchange. A test cell having an address at each local switching module node when allocating its own address to a switching module node of the exchange is proposed. A self-addressing system for assigning a self address, and installing a main switching module node to switch to call processing occurring in a local switching module node to prevent a malfunction of the exchange can be provided. It is to.

In order to achieve the above object, a self address allocation system of an exchange according to the present invention includes a plurality of local switching module nodes, a main switching module node for switching on call processing of subscribers belonging to each local switching module node, It consists of a main processor module node that controls the switching of the switching module node. When assigning a self address to each local switching module node, each local switching module node provides a test cell having its own address to the main switching module node.

Preferably, when the test cell provided to the main switching module node loops back to the local switching module node providing the test cell, it is determined that a magnetic address is assigned.

1 is a view showing a switching module node of a conventional exchange

2 is a diagram illustrating a switching module node having a tree structure in a conventional exchange.

3 is a view showing a switching module node of the switch of the present invention.

4 is a diagram illustrating a switching module node having a forming network structure in an exchanger according to the present invention.

Explanation of symbols for main parts of the drawings

11: main processor module node 12: local switching module node

13: subscriber line circuit module board 14: main switching module node

Such a magnetic tank allocation system of the exchange of the present invention will be described with reference to the accompanying drawings.

3 is a diagram illustrating a switching module node of the exchange of the present invention.

As shown in FIG. 3, the switching module node of the switch of the present invention is connected to the main processor module node 11, which is responsible for billing calculation, and the main processor module node 11 by a global bus. And first, second, ..., fifteen local switching module nodes 12a, 12b, 12o, which connect trunks, announcements, conference calls, etc., and each of the local switching module nodes. Subscriber line circuit module board 13 directly connected to the subscriber at 32 and main switching module node (CSM node) for switching and connecting a call generated at the local switching module node 12 ( 14).

In addition to the subscriber line circuit module board 13 described above, the fifteen local switching module nodes 12 connect various trunks, announcements, No. 7, and conference calls. Configure

In addition, the main switching module node 14 is a subscriber belonging to one local switching module node (for example, the first local switching module node 12a) during call processing occurring at each of the local switching module nodes 12. A call is generated that connects the call originating from to a subscriber of another local switching module node (e.g., third local switching module node 12c).

4 is a view showing a switching module node having a forming network structure in the exchanger of the present invention.

The switching module node of the exchange according to the present invention has a star network structure. First, a main switching module node 14 for switching call processing occurring in a plurality of local switching module nodes 12, and the main processor. The main processor module node 11 and the first, second, ..., fifteenth local switching module nodes 12a, 12b, ... 12o are connected in a forming network structure around the switching module node 14. It is.

Such a method of allocating a self address according to the initialization of an exchange of the present invention causes the central processing unit to assign a self address to node 0 at the central processing unit, and then each local switching module node 12. In the case of assigning a self address, the test cell is generated at each local switching module node 12 to the main switching module node 14 located at the center of the forming network. At this time, the test cell is generated in the main switching module node 14 by allocating a self address to the header of each test cell.

Then, the main switching module node 14 loops back the test cell with the magnetic address of the local switching module node (eg, the fifteenth local switching module node 12o) having its own address in the header portion of the test cell. The main processor module node 11 determines the address of the local switching module node 12 that generated the test cell. That is, the virtual path VP or the virtual channel VC is set.

And, even if the test cell is switched to another local switching module node (for example, the third local switching module node 12c), the test cell is returned to the main switching module node 14 due to the magnetic address stored in the header portion of the test cell. Is sent.

At this time, if the generation of the test cell as described above occurs in the reverse order of the plurality of switching nodes (LSM) it is possible to reduce the effect on the operating system (exchanger) as much as possible.

That is, the influence on the existing virtual path can be minimized.

In the self address allocation system of an exchange according to the present invention, the following effects are obtained.

First, when a test cell finds its own local switching module node by allocating its own address in advance to each of the plurality of local switching module nodes and generating a test cell assigned its own address when assigning its own address at the exchange initialization. Since it is switched repeatedly until the self address allocation can be prevented.

Second, when the test cell is generated in the local switching module node, the test cell is generated in the reverse order, so that the self address can be assigned with minimal effect on the existing virtual path (VP).

Claims (2)

It consists of a plurality of local switching module node, the main switching module node for switching the call processing of the subscriber belonging to each local switching module node, and the main processor module node for controlling the switching of the main switching module node, When assigning a magnetic address to each local switching module node, each local switching module node provides a test cell in which the magnetic address is stored as a main switching module node. The method of claim 1, And if the test cell provided to the main switching module node loops back to the local switching module node providing the test cell, it is determined that a self address is assigned.