KR100186983B1 - Switching apparatus of full electronic switching system - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a switching device for an electronic switching system for expanding a switching device from a small capacity to a very large capacity switching device, and a method for adding the switching device.

The present invention can easily construct a switching device from a small-capacity front electronic exchanger to a very large capacity electronic switching center and can expand the capacity without service interruption. In addition to the central space switch and data link device, which are important parts of the switching device, It is possible to guarantee the high reliability of the system by acting as redundancy between the even and odd optical links. In case of the small capacity electronic exchanger, two local time switches and data link devices are not constituted of central space switch and data link device So that a switching device can be constructed

Description

Switching device of all electronic exchanger and its extension method

1 is a block diagram of a configuration of a small capacity switching device of a full electronic exchanger according to the present invention

FIG. 2 is a block diagram of a first-stage extension switching apparatus of an electric electronic switching system according to the present invention; FIG.

FIG. 3 is a block diagram of the switching device during the two-stage expansion process according to the present invention;

4 is a structural block diagram of the switching device after completion of the second stage expansion according to the present invention

FIG. 5 is a block diagram of a switching device of the second embodiment of the present invention;

DESCRIPTION OF THE REFERENCE NUMERALS

1, 2, 6-8: Local time switch and data link device

3: network synchronization device

4, 5: Even, Lake Central Space Switch and Data Link Unit

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an electronic exchanger such as a mobile communication exchange, and more particularly, to a switching device of an electronic exchanger for adding a switching device from a small capacity to a very large capacity exchange.

Generally, in the case of a small capacity electronic exchange without a central space switch, the service should be stopped and a circuit should be added in order to install a central space switch when a large capacity is added.

In other words, the central area switch is basically configured in the exchange, and if the expansion is required, the local time switch (Loca1 Time Switch) and the data link device are attached.

However, even in the case of a small capacity, there is a problem that costs are increased due to the necessity of a central space switch and a data link device.

In view of the above, the present invention enables the redundancy structure of the system to be expanded without interruption of service when the capacity is increased from a small capacity to a very large capacity, and a small capacity exchanger can be implemented without a central space switch and a data link device. The present invention is directed to a switching device of an electronic switching system and a method of adding the switching device.

In order to accomplish the above object, the present invention provides a central time switch and a data link device, which function as a redundancy between the central space switch and the data link device. The local time switch and the data link device are connected to the even and odd- And the small capacity switching device can be implemented without a central space switch and a data link device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

1 shows a block diagram of a small-capacity switching device of an exchange according to the present invention. This device comprises a local time switch and a data link device 1, but the optical link units 1e, 1f, A time switching unit 1a that does not implement the links 1h and 1i and the processor communication node 1g and that performs a time switching function for the input and output highway, A first to a third multiplexing and demultiplexing unit 1b-ld for transmitting to the time switching unit 1a, receiving the switched highway data from the time switching unit 1a, demultiplexing the received highway data to the subway highway, .

The subscriber unit and the trunk line unit are connected to the first and second multiplexing and demultiplexing units 1b and 1c. The third multiplexing and demultiplexing unit 1d is connected with a signaling device, a common line signaling device, A guide device, a subscriber testing device, and a trunk line testing device.

In the small capacity switching apparatus having the above-described configuration, the time switching unit la performs a time switching function for a total of five input / output highways, and each highway has a capacity of 2K (16,384 Mbps).

The first to third multiplexing and demultiplexing units 1b to 1d receive a total of 64 subway highways (2.048 Mbps) from the outside, multiplex them at a rate of 16.384 Mbps and send them to the time switch unit 1a, The unit 1a sends the switched highway data to the first to third multiplexing and demultiplexing units 1b to 1d.

Each of the first to third multiplexing and demultiplexing units 1b to 1d receives the highway data from the time switching unit 1a and demultiplexes the multiplexed data into a total of 64 subways and sends them out.

The small-capacity exchanger using this switching device can accommodate a total of 16,384 subscribers and 1,920 subscribers simultaneously based on 8: 1 aggregation.

FIG. 2 shows a block diagram of a first stage incremental small capacity switching device according to the present invention. In FIG. 1, a local time switch and a data link device 2 are added and two local time switches and a data link device 1) and (2) are folded into optical links (1h) and (1i).

Here, the optical links 1h and 1i use two for non-blocking and two-step expansion between the two local time switches and the data link devices 1 and 2, The local time switch and the data link devices 1 and 2 receive the same synchronous clock from the network synchronizing device 3 and are connected to the local time switch and the data link devices 1 and 2 through the processor communication And provides nodes lg and 2g.

A small capacity switch using this switching device can accommodate a total of 32,768 subscribers and 4,906 trunk lines based on 8: 1 aggregation.

FIG. 3 and FIG. 4 are block diagrams of the switching device during and after the completion of the two-stage expansion process, which is a switching device configured when the capacity of the switching device of FIG. 2 is exceeded.

To explain the expansion process, the central space switch and data link devices 4 and 5 at even and odd levels and the required number of local time switches and data link devices 6-8 are installed , An optical link, which shows the addition of a local time location and a data link device.

In addition, by minimizing the call volume, the local time switch and the data links of the data link devices (6) and (7) are blocked by software so that the connection of the call through the even optical link is no longer established. At this time, all calls between the two local time positions are made via the draft optical link.

When the use of the call through the even-numbered optical link is completed, the semi-permanent call channel through the even-numbered optical link is transferred to the channel of the odd-numbered optical link by software, and the optical cable of the even-numbered optical link is removed.

The even-numbered optical links of the local time switch and the data link devices 5 and 7 are connected to the corresponding input / output optical links of the central space switch and the data link devices 4 and 5, (4) and (5). If there is no abnormality, the local time switch and the network link clock cables of the data link devices (6) and (7) are removed to switch to optical link synchronization.

Software is non-blocking the even-numbered optical links of the local time switch and data link devices (6) and (7) to ensure that the connection of the call over the even-numbered optical link is normal. If there is no abnormality, the local time switch and the draft optical links of the data link devices (4) and (5) are connected to the central space switch and the data link device in the same manner as the fifth optical switch.

And the local time switch and the even and odd optical links of the data link device 8 are connected to the corresponding input / output optical links of the central space switch and the data link devices 4 and 5, and the local time switch and the data link device 8 to operate the entire switch device.

FIG. 5 shows a block diagram of a large capacity switching device according to the present invention, which includes 32 local time switches and data link devices, even and odd central space switches and data link devices 4 and 5, Of course, such a very large capacity switching device can also be built from an extremely small capacity stage to an extremely large capacity.

The local time switch and data link device, the central space switch, and the data link devices 4 and 5 are configured in redundancy for reliability.

These large capacity switching devices are divided into the central space switch and the data link device, which are important parts of the switching device, and the optical link is divided into the even and odd number in addition to the redundancy. So that the even and odd optical links act as redundancy between the even and odd optical links, ensuring high reliability of the system.

Also, the maximum number of accommodated subscribers and the number of relay players using the switching device can accommodate a total of 262,144 subscribers and 61,440 subscribers in terms of the switching capacity based on the subscriber device having the 4: 1 aggregator, Up to 120,000 trunk lines can be accommodated.

As described above, according to the present invention, it is possible to easily construct a switching device from a small-capacity front electronic exchanger to a very large capacity electronic switching center, to increase capacity without service interruption, and to provide a central space switch and data link device In addition to redundancy, the links act as redundancy between the even and odd optical links, ensuring high reliability of the system.

Also, in the case of a small-capacity electronic exchanger, a switching device can be configured without configuring a central space switch and a data link device to two local time switches and a data link device, thereby reducing the unit cost per line of the exchange.

The present invention is applied to switching devices of CDMA and PCS mobile communication exchanges and switching devices of a large-capacity mobile communication gateway exchanges. In addition to the electronic switching devices such as PSTN, Toll exchangers, tandem Tandem) exchanger and so on.

Claims (9)

A time switching unit (la) for performing a time switching function for the input / output highway, a multiplexer for receiving and multiplexing the subway data from the outside and transmitting the multiplexed data to the time switching unit (1a) First multiplexing and demultiplexing units 1b through 1d for receiving data and demultiplexing the data to a subway and outputting the demultiplexed data to the subway highway, optical matching units 1e and 1f, a processor communication node 1g, Optical link (1h), (1i). ≪ / RTI > (1f), the processor communication node (1g), the optical links (1h), (1i) are not mounted in the case of the small capacity switching device according to the first aspect of the present invention, / RTI > 2. The switching power supply according to claim 1, characterized in that, in the case of the first-stage expansion small capacity switching device, one of the above-mentioned components (1a-1f) is additionally constituted and connected by the optical links (1h) and (1i) The switching device of the electronic exchanger. A local time switch connected to the even and odd numbered central space switches and the data link devices 4 and 5 via an optical link, And a data link device (6-8). 5. The switching device according to claim 4, wherein the local time switch and the data link device (6-8) are synchronously clicked by the network synchronizing device. 5. The switching device according to claim 4, wherein the number of the local time switches and the data link devices (6-8) can be increased by a required number. A first step of installing even and odd numbered central space switches and data link devices (4), (5), a required number of local time switches and a data link upper limit, and connecting an optical link; A second step of blocking the even-numbered optical links of the local time switch and the data link device by software so that the connection of the call through the even-numbered optical link is no longer established; and if the use of the call through the even- A third step of transferring the communication channel through the optical link to the channel of the odd optical link by software and then removing the optical cable of the even optical link, and a third step of transferring the even optical link of the local time switch and the data link device to the central space switch and data Output optical link by the link devices 4 and 5, and the central space switch and the data link devices 4 and 5, A fourth step of removing the local time switch and the network synchronous clock cable of the data link device to switch to optical link synchronization if there is no abnormality in the operation of the local time switch and the data link device; A fifth step of confirming whether the connection of the call through the optical link is normal, and a sixth step of operating the entire switch device by activating the local time switch and the data link device, Of a switching device. 8. The method as claimed in claim 7, wherein all the calls between the two local time switches are made through an odd optical link when the connection of the call through the even optical link is interrupted in the second step. The method as claimed in claim 7, further comprising, after the fifth step, connecting the odd optical link of the local time switch and the data link device to the central space switch and the data link device in the same manner as the even- Wherein the switching device is further provided with a switching device.