KR19990017576A - Device redundancy device in all electronic switch - Google Patents

Abstract

The present invention relates to a device redundancy device suitable for preventing service interruption caused by a space switch error in an electronic switch. In the conventional technology, data is transmitted between duplicated boards even when an error occurs on any one board on the transmitting side. Cables 140 and 142 are duplexed to allow data transmission to the receiving side. However, if there is something wrong with the board, the receiving side receives the data and transmits it to its own self. (Function) An error occurred, but there was a drawback in that the service could be stopped due to transmission but not reception. However, in the present invention, the redundant shelves 20, 21, 22, and 23 are configured in one printed circuit board, and the two shelves are In a pattern, reducing cables between redundant Shelf, cross By eliminating the current phenomenon, which will can improve the above-mentioned drawbacks.

Description

Device redundancy device in all electronic switch

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device redundancy device such as a printed board assembly (PBA) in an electronic switchgear, and more particularly, to a device redundancy switch that can prevent service interruption in the event of a space switch error in the electronic switchgear. A redundancy device relates.

1 is an electronic switch, for example TDX-, comprising a transmitter configured to receive a call from a subscriber and transmit it to a corresponding switching center, and a transmitter configured to receive a call and connect a call to the called subscriber. A block diagram of 10 is shown.

The transmitting part that handles the call of the exchange is composed of two shelves 10 and 11, each of which is duplexed in side-by-side form.

The transmitter is composed of a first shelf (10) operating in an active state and a second shelf (11) operating in a stand-by mode in order to prevent the occurrence of an error in the process of receiving and transmitting a call. . Each of the duplicated shelves 10 and 11 has the same configuration, and includes a time division switch / link unit 100 and 102 for receiving and multiplexing a voice data signal, and a spatial switch / link matching for receiving and demultiplexing the multiplexed signal. Receive the signals matched by the highway matching unit 120, 122 and the highway matching unit 120, 122 to highway matching data received from the unit (110, 112), spatial switch / link matching unit (110, 112) Switch matrix units 130 and 132 for switching operations required for exchange are provided.

The path from the first spatial switch / link matching section 110 of the active shelf 10 to the first highway matching section 120 and the second from the second spatial switch / link matching section 112 of the standby shelf 11. The path to the highway matching portion 122 is crossed by the data cable 140.

The receiver transmits the call signal to the called party in the opposite direction to the transmission path of the transmitter. Similar to the configuration of the transmitter, the receiver is a side by side dual shelf (12, 13) in an active / standby state. It consists of).

The path from the third highway matching section 124 of the active shelf 12 of the receiver to the third space switch / link matching section 114 and the fourth space from the fourth highway matching section 126 of the standby shelf 13. Data paths 142 are cross-connected between paths to switch / link mating portions 116.

Looking at the operation in the electronic switch system having the above-described configuration, the voice data is multiplexed in the time division switch / link unit (100, 102) of the transmitter to be converted into an optical signal and then set the space switch / link matching unit (110, 112) Is sent.

The spatial switch / link matching unit 110, 112 demultiplexes the received optical signal and transmits the received optical signal to the corresponding highway matching unit 120, 122, and the highway matching unit 120, 122 transmits the received demultiplexed data. The switch is transmitted to the switch matrix unit 130 or 132 where substantial switching is performed.

The switch matrix unit 130 and 132 of the transmitter performs a spatial division function by using the switching control data provided from the upper processor. The switching control data together with the spatial divided voice data is a twist connecting the transmitter and the receiver. It is transmitted to a receiver of a large power through a pair pair cable.

Voice data at the receiving end of the power station is a path opposite to the transmission path, the switch matrix unit 134 and 136, the highway matching unit 124 and 126, the spatial switch / link matching unit 114 and 116, and the time division switch / link. It is transmitted to the subscriber side through the units 104 and 106.

However, in the related art, each shelf is made of a back panel printed circuit board (Back Panel PCB) so that only the components in the same shelf are connected in a pattern, and the other shelf is connected by data cables 140 and 142. Due to the limited number of pins that can be connected to the backboard, it was not possible to extend the cable.

Therefore, if a particular highway matcher 120 in the active shelf has hernias or errors and a particular highway matcher 122 in the standby shelf has a hernia or error, the path of the redundant data cable 142 may pass through. Since there is no path to the call via the corresponding highway matching units 124 and 126 to the receiving side, the service for the service call is suspended, and connection to a new call attempt becomes impossible.

In addition, even if an error occurs in any one of the highway matching unit 120 or 122, the transmitting side may transmit data to the receiving side because the data cable is duplicated between the boards duplicated by active / standby. If an error occurs in any one of the highway matching units 124 or 126 on the side, it is not possible to switch to another highway matching unit 126 so that a function error occurs in the corresponding highway matching unit. There was this.

As described above, an error state in which a transmission is possible but is not received and the service is stopped is referred to as a cross error state.

Therefore, the present invention has been made to solve the above-mentioned drawbacks of the prior art, and provides a redundancy apparatus in an all-electronic switch that implements redundancy to prevent data collision due to cross errors and prevents errors in advance. The purpose is to.

In order to achieve the above object, the present invention provides a transmitter that is duplicated with a shelf in an active / stand-by state for receiving a call and transmitting a call to another station in order to connect with a called subscriber. A redundancy device of a device in an all-electronic switching system comprising a duplicated receiving unit in an active / standby state in which an active / standby state is connected to a receiving subscriber to receive a signal of the receiver. Time-switched switch / link section of the transmitter to convert the signal to the transmitter, the spatial switch / link matcher which demultiplexes the optical signal converted by the time-division switch / link section, and transmits the data to the transmitter station Highway matching unit for matching and transmitting; actual switch required for exchange by receiving signal from highway matching unit Switch matrix for performing work, means for connecting the path from the spatial switch / link matching section of the active shelf to the highway matching section and the path from the standby shelf space switch / link matching section to the highway matching section, the active matching highway matching section Means for connecting the path from the standby matching part of the standby shelf to the switch matrix part of the standby matrix, wherein each active / standby shelf of the receiving part receives a signal from the transmitting part and is required for the actual switching operation. A switch matrix unit for performing a data matching from the switch matrix unit, a highway matching unit for transmitting the data received from the switch matrix unit, and a spatial switch / link matching unit for receiving data signals from the highway matching unit and multiplexing them into optical signals. Optical signal from link matching Means for connecting the path from the spatial switch / link matching section of the active shelf to the highway matching section and the standby shelf from the spatial switch / link matching section to the highway matching section. And means for connecting a path from the highway matching section of the active shelf to the switch matrix section and the path from the standby matching section of the standby shelf to the switch matrix section.

1 is a block diagram of a transmitter or a receiver in an electronic switch according to the prior art;

Figure 2 is a block diagram of a transmitter or receiver in the electronic switch according to the present invention.

<Description of the code | symbol about the principal part of drawing>

20: first shelf 21: second shelf

22: third shelf 23: fourth shelf

200, 202, 204, 206: first, second, third, fourth time division switch / link portion

210, 212, 214, 216: first, second, third and fourth spatial switch / link matching

220, 222, 224, 226: first, second, third, fourth highway matching portion

230, 232, 234, 236: first, second, third, fourth switch matrix unit

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below by those skilled in the art.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention.

Figure 2 is an electronic switch, for example, TDX- including a transmitting unit for receiving a call from a subscriber and transmitting it to a corresponding switching station, and a receiving unit for receiving the call and connecting the call to the called subscriber. 10 shows a block diagram of the exchange.

The transmitting unit of the exchange is duplicated in an active / standby state in order to prevent an error in the process of receiving and transmitting a call, the first shelf 20 operating in dual active, and the second shelf 21 operating in standby. ), When an error occurs in the first shelf 20, the second shelf 21 is automatically activated and the first shelf 20 is in a standby state.

The redundant block configuration in the transmitter having the same configuration includes time division switch / link units 200 and 202 for receiving and multiplexing voice data signals, and a network space switch / link matching unit 210 for receiving and demultiplexing multiplexed signals. 212, highway matching units 220 and 222 for highway matching data received from the spatial switch / link matching units 210 and 212, and signals matched by the highway matching units 220 and 222 for exchange. The switch matrix unit 230, 232 for performing a switching operation required for.

According to the invention, the redundant active and standby shelves 20, 21 of the transmitter are constructed in a single printed circuit board and connected to each other in patterns 240, 242.

In detail, the pattern 240 is a path from the space switch / link matching portion 210 of the active shelf to the highway matching portion 220 and the highway matching portion 222 from the standby switch of the spatial switch / link matching portion 212. The pattern 242 is connected to the path from the highway matching portion 220 of the active shelf to the switch matrix portion 230 and from the standby matching portion 222 of the standby shelf to the switch matrix portion 232. It is connected between.

Therefore, since the redundant configuration of the present invention is connected to the patterns 240 and 242 of the printed circuit board, even if a defect occurs in one shelf, it is routed through another route having the same redundant function. It is possible to connect with the subscriber.

On the other hand, the receiver is composed of two shelves 22 and 23 which are duplicated in an active / standby state similarly to the transmitter and connected in a pattern 244 and 246 to a single printed circuit board.

The receiver transmits a call signal to the called party in the opposite direction to the path of the transmitter, and the switch matrix units 234 and 236 receive the signal from the transmitter and perform the actual switching work required for the exchange, and the switch matrix. Highway matching units 224 and 226 for highway matching and transmitting the data received by the sections 234 and 236, and signals converted into optical signals of the transmitting unit from the highway matching sections 224 and 226 and received as optical signals. A spatial switch / link matching section 214, 216 for multiplexing and transmitting, and a time division switch / link section 204, 206 for receiving an optical signal from the spatial switch / link matching section, demultiplexing, and transmitting the optical signal to the subscriber side. .

The pattern 244 of the duplicated shelf 22 is connected to the third spatial switch / link matching section 214 and the third highway matching section 224, and the fourth spatial switch / link matching section 216 and the fourth spatial switch / link matching section 216. 4 is connected between the highway matching portion 226, the pattern 246 of the self 23 is connected to the third highway matching portion 224 and the third switch matrix portion 234, and the fourth highway The matching unit 226 is connected between the fourth switch matrix unit 236. With this configuration, even if an error occurs in one shelf, it is possible to connect with the corresponding subscriber through another shelf.

Looking at the structure of the call path in the electronic switch system having the above-described configuration, the voice data is multiplexed in the time division switch / link unit (200, 202) is converted into an optical signal, and then the spatial switch / link matching unit (210, 212).

The spatial switch / link matcher 210 and 212 of the transmitter transmits the multiplexed optical signals to the highway matcher 220 and 222, and the highway matcher 220 and 222 transmits the received data to the switch matrix unit 230. , 232).

Referring to the process of connecting the call of the called subscriber in the receiver, when the transmitter transmits a call signal, the switch matrix unit 234 set to the active part of the receiver divides the received voice data by the control data received from the upper processor. This switching data is connected to the time division switch / link unit 204 via the corresponding highway matching unit 224 and the spatial switch / link matching unit 214 in a path opposite to the transmission path in the receiving path. Connect the call data signal.

When a particular highway matching part has an error such as a hernia in a duplicated shelf 20, 21, or one of the shelves 22 or 23, or when a specific highway matching part has an error such as a hernia in another shelf, Contrary to the technique of &lt; RTI ID = 0.0 &gt; a, &lt; / RTI &gt; the interruption for a call in service because the path through the highway matching section 220, 222, or 224, 226 is connected in a pattern 240, 242, or 244, 246. Service is available without interruption to new call attempts.

As described above, the present invention provides a shelf panel 20, 21, 22, 23 of each of two surfaces connected to a back panel printed circuit board for each shelf in the related art and duplexed with data cables 140 and 142. According to the design, it is possible to reduce the number of cables between the shelves 20, 21, 22, and 23 by making a single board and connecting the two shelves in patterns 240, 242, 244, and 246, respectively. There is an active and standby path switching function between the two to eliminate cross errors caused by data collisions.

As described above, the present invention has been described in connection with specific apparatus, but such description is merely an example, and is not limited to the technical spirit of the present invention as described in the appended claims.

Claims (3)

In order to receive a call and connect it with a called party, a transmitter duplicated by an active / stand-by shelf (Shelf) that sends a call to another station, and receives a signal from the transmitter to connect with a called party A device redundancy device of an electronic switching system comprising a duplicated receiver with a shelf in an active / standby state, wherein each shelf of the transmitter comprises: a time division switch of a transmitter for receiving and multiplexing voice data signals and converting them into optical signals; Link units 200 and 202; A spatial switch / link matching unit (210, 212) for demultiplexing the optical signal converted by the time division switch / link unit (200, 202) and transmitting the demultiplexed signal to the transmitting unit mother station; A highway matching unit (220, 222) for highway matching and transmitting data received by the spatial switch / link matching unit (210, 212); A switch matrix unit 230 and 232 for receiving a signal from the highway matching unit 220 and 222 to perform an actual switch operation required for the exchange; Means for connecting a path from the spatial switch / link matching unit 210 of the active shelf to the highway matching unit 220 and a path from the standby shelf of the spatial switch / link matching unit 212 to the highway matching unit 222 ( 240); A means 242 for connecting a path from the highway matching unit 220 of the active shelf to the switch matrix unit 230 and the path from the standby matching unit 222 of the standby shelf to the switch matrix unit 232, Each active / standby shelf of the receiver includes: a switch matrix unit (234, 236) for receiving signals from the transmitter and performing actual switch operations for exchange; A highway matching unit (224, 226) for highway matching and transmitting the data received by the switch matrix unit (234, 236); A spatial switch / link matching unit (214, 216) for receiving data signals from the highway matching unit (224, 226), multiplexing them into optical signals, and transmitting the optical signals; A time division switch / link unit (204, 206) for demultiplexing the optical signal from the spatial switch / link matching unit and transmitting it to the subscriber side; Means for connecting a path from the spatial switch / link matching section 214 of the active shelf to the highway matching section 224 and the path from the standby shelf of the spatial switch / link matching section 216 to the highway matching section 226 ( 244); Means 246 for connecting the path from the highway matching section 224 of the active shelf to the switch matrix section 234 and the path from the standby matching section 226 to the switch matrix section 236. A device redundancy device for an all-electronic exchange. 2. The apparatus of claim 1, wherein the redundant active and standby shelf (20, 21) of the transmitter is a pattern (240, 242) of a single printed circuit board. 2. Device according to claim 1, characterized in that the redundant active and standby shelf (22, 23) of the receiver is a pattern (244, 246) of a single printed circuit board.