KR200326001Y1 - Redundancy device of space switch of electronic exchange - Google Patents

Abstract

The present invention relates to a redundancy device of a space switch of an electronic switch, and in particular, an interface unit for applying a command system such as control data, a clock, an address applied from a processor, to a data processing unit; A data processor which decodes various data applied from the interface unit to make necessary data in a board; A latch unit configured to store data generated by the data processor in a switch control memory; A switch control memory unit configured to receive and store a control signal generated by the data processor through a latch unit; An output latch unit for matching data synchronization and timing; A clock monitoring unit which checks whether the operation of the clock signal generated by the network synchronizer block NES is normal; A clock buffer for converting the clock signal applied through the clock monitor into a necessary clock signal in a board; A receiver unit receiving the highway data applied from the CLI board in a 4-bit parallel 2-bit serial; A matrix unit controlling switching of a gate according to data applied from the receiver unit; The redundancy device of the space switch of the electronic switchboard, characterized in that it comprises a driver for determining the output of the data applied in accordance with the switching of the matrix unit, the present invention by the switch connected to the in-ejector when the circuit pack By detecting hernias and redundancy switching, even if a circuit pack is hermetic, the loss of data on the channel is minimized.

Description

Redundancy device of space switch of electronic exchange

The present invention relates to a redundancy device of a space switch of an electronic switching system, and in particular, to be applied to a mobile communication switch and a switch of a personal communication service (hereinafter referred to as a PCS). Redundant spatial switches between the central data links prevent data loss when disconnecting circuit packs or cables, ensuring reliable data transfer from the first central data link to the second central data link The redundancy device of the space switch of the electrical exchanger for.

In general, the related art has a cross redundancy structure between the central data link and the spatial switch, and in order to stably perform such redundancy, data communication between the central data link and the spatial switch indicates the state of the link. By sending the information, it was extracted at the receiving end and processed in the event of abnormality. If both redundant links are normal data, the main board side should be selected first.

FIG. 1 is a diagram illustrating a redundant structure of a central data link and a space switch of a conventional all-electronic exchange. The redundant A and B of the central data link and the redundant A 'and B' of the spatial switch are highway data cables 131 and 132. And block redundancy cables (133, 134). Data input from the time switch device (not shown) to the central data link (A, B) via the optical cable extracts the highway data and performs S / P (SERIAL TO PARALLEL) conversion, which indicates the highway path state. The information is added to the space switch device through the highway data cables 131 and 132. At this time, the space switch device receives the highway data by redundancy by sending the data input through the highway cable to the opposite side through the redundant cable 134. The input highway data extracts the path state information sent from the central data link before switching in the spatial switch device, and selects the normal path and switches. The switched highway data is sent back to the central data link along with the highway path information, and the highway data is also redundantly received through the redundant cable 133 in the central data link.

However, the central data link and the space switch operate normally even if defects, misinsertions, or hernias occur in the redundant cables 133 and 134. Therefore, the central data link and the space switch device must be cross-checked to verify the error. There was a problem.

An object of the present invention is to solve the above conventional problems, in particular, the redundancy method between the central data link and the space switch uses a hot standby (HOT / STAND-BY) method, the hot standby method In order to operate stably, the space switch circuit pack uses IPWFA (INPUT POWER FAIL), which is a signal provided from the power pack when switching power, for redundancy switching.When the circuit pack is removed, the switch connected to the in-jector of the circuit pack is disconnected. It is to provide a redundancy device of a space switch of an all-electronic switch that controls redundancy by using an active standby / stand-by cable, an active signal of the opposite side, and a clock fail signal. .

In order to achieve the above object, the apparatus for redundancy of a spatial switch of an electronic switch according to the present invention includes an interface unit for applying a control system, a clock, an address, etc., to a data processor; A data processor which decodes various data applied from the interface unit to make necessary data in a main board; A latch unit configured to store data generated by the data processing unit in a switch control memory and to transmit contents stored in the switch control memory to a data processing unit; A switch control memory unit configured to receive and store a control signal generated by the data processor through a latch unit; An output latch unit for matching data synchronization and timing; A clock monitoring unit which checks whether the operation of the clock signal generated by the network synchronizer block NES is normal; A clock buffer for converting the clock signal applied through the clock monitor into a necessary clock signal in a board; A receiver unit receiving the highway data applied from the CLI board in a 4-bit parallel 2-bit serial; A matrix unit configured to control switching of a gate according to control signals applied from the data processor and the output latch unit to data applied from the receiver unit; Technical features of the present invention include a driver unit configured to determine whether to output the data applied according to the switching of the matrix unit.

1 is a redundancy of a central data link and a space switch of a conventional electronic switch.

Is a diagram showing the structure,

2 is a space in the redundant device of the space switch of the electro-electric switch of the present invention

It is a schematic redundancy structure of the switch,

3 is a space in the redundant device of the space switch of the electro-electric switch of the present invention

Detailed redundancy diagram of switch

Figure 4 is a center in the redundancy device of the space switch of the electro-electric switch of the present invention

It is a redundant structure diagram of data link and space switch.

<Description of the symbols for the main parts of the drawings>

10: interface unit 20: data processing unit

30: latch portion 40: switch control memory

50: output latch unit 60: clock monitoring unit

70: clock buffer 80: receiver

90: matrix portion 100: driver portion

Hereinafter, with reference to the accompanying drawings for an embodiment according to the technical idea of the redundancy device of the space switch of the present invention electronic switch configured as described above is as follows.

<Example>

As shown in FIG. 2 and FIG. 3, the interface unit 10 applies a command system such as control data, a clock, and an address applied from a processor to the data processing unit, and the data processing unit 20 receives the command system from the interface unit 10. Decodes various data applied and generates necessary data in the board, and transmits the data to the latch unit 30 and the matrix unit 90. The latch unit 30 transfers the data generated by the data processing unit 20 to the switch control memory. 40 may be stored in the switch control memory 40 so that the data stored in the switch control memory 40 may be transmitted to the data processor 20 for processing. The switch control memory 40 may be generated by the data processor 20. The control signal is applied and stored through the latch unit 30, the output latch unit 50 synchronizes the timing and synchronization of the data, and the clock monitoring unit 60 transmits to the network synchronizer block NES. It is checked whether the operation of the generated clock signal is normal, and the clock buffer 70 generates a clock required by the main board based on the clock signal applied through the clock monitoring unit 60 and applies it to each device. In (80), the highway data applied from the CLI board is applied as parallel data of 4 bits and serial data of 2 bits, and in the matrix unit 90, the data processing unit 20 receives the data applied from the receiver unit 80. And the switching of the gate according to the control signal applied from the output latch unit 50, and the driver unit 100 determines whether to output the data applied according to the switching of the matrix unit 90 or not. By configuring the present embodiment in conjunction with the operation of the other side board.

Hereinafter, the operation of the present embodiment configured as described above will be described in detail with reference to the accompanying drawings.

First, FIG. 2 is a block diagram related to redundancy in a space switch circuit pack, in which terminal 110 is a terminal for transmitting a clock error signal in a main board, and terminal 120 is a terminal for transmitting a clock error signal of a sub-board that is a counterpart board. Terminal 130 is a terminal for transmitting active standby information of the sub-board which is the other board, terminal 140 is a terminal for transmitting information on the mounting state of an active standby cable, and terminal 150 is an input output from a power pack Terminal 160 transmits error information of power supply, and terminal 160 is a terminal to receive data on whether the circuit pack is mounted or not through a switch connected to the in-ejector of the circuit pack, and terminal 170 is to switch the switch. Terminal 180 is a terminal through which data is transmitted, and terminal 180 is a terminal through which a switch reset signal of a circuit pack is transmitted. This signal is applied to control the main board to the active standby state.

On the other hand, when the in-ejector switch of the circuit pack is turned off, a power failure from the power pack, a switch reset signal, a signal generated by the power reset, or a switching signal by the switch is input, the board is switched regardless of other signals. The priority is given to the active standby cable mounting state rather than the active standby state signal, the clock error signal, and the clock error signal of the opposing side, so that the phenomenon occurring when all the active standby cables are disconnected can be prioritized. When both active standby cables are disconnected, both sides (main board and sub-board) operate as standby, so the switched data is not exported from either side, and if one cable of two active standby cables is disconnected, the cable disconnection signal Boards received are in standby, The other board is active.

At this time, the abnormality of the board to inform the user through the LED light.

If the redundant cable is plugged in, hot-standby is stable because only the active side exports data.

Meanwhile, FIG. 3 is a detailed block diagram showing a space switch. In the data processing unit 20, a clock error signal and information on an active standby, a status information on an active standby cable, and an input power output from a power terminal are provided in the counter board. By combining the error signal, the signal of whether the redundant cable is mounted, the control data, the clock, the address of the processor applied through the interface unit 10, and generating the necessary data, that is, switching information in the board, the matrix unit 90 ) Is applied.

The write enable latch 31, the input latch 32, the address latch 34, etc. of the latch unit 30 simultaneously store the data generated by the data processor 20 in the switch control memory unit 40. In operation, the contents of the data processing unit 20 are stored in the switch control memory unit 40, and the output latch 33 is used to apply the data stored in the switch control memory unit 40 to the data processing unit 20. The data is applied to the data processor 20 as the output latch 33 operates.

On the other hand, the data stored in the switch control memory unit 40 is applied to the matrix unit 90 through the output latch 50, the clock monitoring unit 60 is applied to the 32MHz clock applied from the network synchronizer block (NES) Whether the signal is normally applied is monitored, and the clock buffer 70 generates an internal clock necessary for the circuit based on the clock signal applied through the clock monitoring unit 60.

On the other hand, the matrix unit 90 combines the signals applied from the data processing unit 20 and the output latch 60 to apply the data applied from the receiver unit 80 to the driver unit 100, the matrix The driver unit 100 determines whether to output the transmitted data according to the combined signal in the unit 90.

4 is a structural diagram showing redundancy of the central data link and the space switch, and shows a redundancy structure between the redundancy (A, B) of the space switch device and the central data link circuit pack (C to F, G to J). Referring to the flow of highway data in FIG. 4, the central data link circuit packs C, D, E, and F receive electrical signals of 155 MHz optical serial (SERIAL) data received through an optical cable from a time switch (not shown). It converts the serial data into parallel data, extracts 2048 channel highway data, and converts it into 4 bits of parallel data and 2 bits of serial data, which is sent only to the active side of the spatial switch circuit pack.

It enters both sides of the spatial switch via redundant cables, switches on the highway, and passes through the active side to the central data link (D, F, H, J).

As described above, the redundancy device of the spatial switch of the inventive electronic switch, in particular, even if the active standby redundant cable is demounted in the redundant design, the space switch circuit pack operates in standby at the same time so that the highway data does not switch, so the space switch It is easy to see that there is a problem in the circuit pack, and when the power supply of the circuit pack is cut off, the input power error signal output from the power pack is applied to make a redundant switch to minimize the loss of data in the call, and the switch connected to the in-ejector when the circuit pack is removed. By detecting hernias and redundancy switching, even if a circuit pack is hermetic, there is an effect of minimizing data loss on the channel.

Claims (2)

An interface unit for applying a command system such as control data, a clock, and an address applied from a processor to the data processor; A data processor which decodes various data applied from the interface unit to make necessary data in a board; A latch unit configured to store data generated by the data processing unit in a switch control memory and to transmit contents stored in the switch control memory to a data processing unit; A switch control memory unit configured to receive and store a control signal generated by the data processor through a latch unit; An output latch unit for matching data synchronization and timing; A clock monitoring unit which checks whether the operation of the clock signal generated by the network synchronizer block NES is normal; A clock buffer for converting the clock signal applied through the clock monitor into a necessary clock signal in a board; A receiver unit receiving the highway data applied from the CLI board in a 4-bit parallel 2-bit serial; A matrix unit configured to control switching of a gate according to control signals applied from the data processor and the output latch unit to data applied from the receiver unit; And a driver unit configured to determine whether to output or not output data applied according to the switching of the matrix unit. 2. The apparatus of claim 1, wherein a switch connected to the in-ejector of the circuit pack is used to monitor the hernia of the circuit pack and to perform the redundancy switching using the switch.