KR100460115B1 - Control apparatus for doubling an IPC link - Google Patents

Abstract

The IPC link redundancy control device according to the present invention includes a plurality of matching circuits for matching signals input and output to an IPC link board, an IP processing unit for processing IP data matched by the matching circuits, and an active device. A redundant link board comprising a redundant state monitoring unit for receiving and outputting an active port selection unit for selecting a port, an output signal of an active port or a standby port, and monitoring and controlling the state of the redundant link board,

The redundant link board included in each link board, and outputs a control signal to each of the redundant state monitoring control unit so that the standby or active redundant link board monitors and controls the operation state of the other link board, respectively. Is characterized in that it further comprises a redundant monitoring signal generation unit for preventing the operation is active at the same time.

According to the present invention, it is possible to prevent the loss of the IPC link due to the IPC data collision caused by both the redundant link boards are active, and IPC link with the IPC link board in the abnormal state that may occur during the redundancy of the IPC link Ensures that the IPC link between the home country and the home country is stable and reliable at all times.

Description

Control apparatus for doubling an IPC link}

The present invention relates to an apparatus for controlling redundancy of an IPC link, and in particular, not only a link board operated by standby but also an active link board to monitor the operation state of a redundant counterpart link board. The present invention relates to a redundant control device of an IP link, so that the IP link is always maintained in a stable state.

In general, interprocessor communication (IPC: IPC) network is used for data communication between a mother station and a local station in an exchange system. In other words, the data transmitted through the relay line between the home country and the home country is transmitted through the IPC link. In order to maintain stable communication, it is necessary to increase the stability and reliability of the IPC link between the home country and the home country.

1 is a block diagram schematically illustrating a configuration of a duplex control device of a conventional IPC link.

Referring to FIG. 1, a conventional redundancy control device of an IPC link includes A and B port Tx IPC data signals and A and B port Rx IPC data signals input and output to IPC link boards 106 and 106-1. A, B port Tx IPC selection signal to designate active or standby state of board, A, B port Rx to inform operation status of active link board externally A, B to match IPC selection signal and IPC data Port matching circuit section 104,104-1,105,105-1, IPC processing section 101,101-1 for processing input A, B port Tx IPC data signal and output A, B port Rx IPC data signal, A, B port Tx IPC Active port selection unit (102,102-1) for receiving active signal from IPC link board to select active port, A, B port Rx Receives IPC selection signal and checks the presence of active link board to control redundancy Redundant status monitoring controller (103,1) 03-1).

Here, the IPC processing units 101 and 101-1, the active port selecting units 102 and 102-1, the redundant state monitoring control units 103 and 103-1, and the A and B port matching circuit units 104, 104-1, 105 and 105-1 are relay lines (not shown) and IPCs. Located between the link boards is provided inside the E1 link board used as IPC link.

Then, the operation of the conventional IPC link redundancy control device having the above configuration will be described with reference to FIGS. 1 and 2. Here, since the E1 link board is duplexed into A and B, it will be limited to the A side for convenience, and the configuration and operation of the B side will be understood by the description of the A side.

First, the active port selection unit 102 determines the active port by receiving the A, B port Tx IPC selection signal for specifying the active or standby operation state of the redundant E1 link boards from the IPC link board. The A and B port Rx IPC selection signals of the active ports among the ports are received and the presence or absence of the link board in the active state is confirmed by the redundant state monitoring control unit 103 of the link board in the standby state.

At this time, if there is an active link board, the redundant state monitoring control unit 103 of the link board operating in the standby state is controlled to continue to operate in the standby state, the active state of the link board operating in the active port It receives and monitors the A and B port Rx IPC selection signals and continuously controls them when the A and B port Rx IPC selection signals of the active port output from the link board operated in the active state disappear. .

2 is a view showing in detail the configuration of the redundant state monitoring control unit constituting the conventional redundancy control device of the IPC link.

Referring to FIG. 2, the first D flip-flop 201 of the E1 link board which is operated in standby is dualized and the Rx IPC selection signal of the E1 link board which is operated in an active manner, and the first D flip-flop 201 is in standby mode. The IPC selection signal 2, which is operated by the LSI, is latched by the redundancy status check clock 1 when the redundancy status monitoring signal 1 is high to monitor the status of the active link board. In addition, the A and B port matching circuit input and output directions are controlled by the output of the redundant state monitoring controller.

That is, the E1 link board in the standby state is monitored and the E1 link board in the active state is monitored. When the A and B port Rx IPC selection signals of the active port disappear, the E1 link board in the standby state is activated and operated.

However, according to the redundant control apparatus of the conventional IPC link as described above, the link board operated only in the link board operated in standby is monitored and controlled, and the link board operated in standby in the active link board. There is no monitoring and no redundancy control. In this case, in case of abnormal IPC board switching or A / B port switching, the link board operated as standby is switched to active, and two redundant link boards are operated at the same time to prevent IPC data collision. This can cause problems with link clogging.

The present invention has been made to solve the above problems, and the redundant control device of the IPC link to monitor and control the operating state of the redundant counterpart board not only in the standby link board, but also in the active link board. The purpose is to provide.

1 is a block diagram schematically showing the configuration of a conventional IP link redundancy control device.

2 is a detailed configuration diagram illustrating a redundant state monitoring control unit of a conventional IPC link redundancy control device;

Figure 3 is a block diagram schematically showing the configuration of the IPC link redundancy control apparatus according to an embodiment of the present invention.

4 is a detailed configuration diagram illustrating a redundancy state monitoring control unit of the IPC link redundancy control device of the present invention.

Figure 5 is a block diagram showing a signal generated in the redundancy status signal generator of the IPC link redundancy control device of the present invention.

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

101,101-1,301,301-1 .......... IPC processing unit

102,102-1,302,302-1 .......... active port selector

103,103-1,303,303-1 .......... Redundancy status monitoring control unit

304,304-1 ..... Redundancy monitoring signal generator

104,104-1,305,305-1 ........... A port matching circuit

105,105-1,306,306-1 ........... B port matching circuit

106,106-1,307,307-1 ........... IPC Link Board

201,202,401,402,403 .......... D flip-flop

203,404 .......... AND Gate 405 ......... OR Gate

204,406 .......... Multiplexer

In order to achieve the above object, an apparatus for controlling redundancy of an IPC link according to the present invention includes a plurality of matching circuit units for matching signals input and output to an IPC link board, and IP data processing matched by the matching circuit unit. The redundant link configured including an IP processing unit for processing, an active port selecting unit for selecting an active port, and a redundant state monitoring controller for monitoring and controlling the state of the redundant link board by receiving an output signal of an active port or a standby port. In the board, Each of the link board included in the link board, the standby or active redundant link board to output a control signal to each of the redundant state monitoring control unit to monitor and control the operating state of the other link board, Prevent redundant link boards from operating simultaneously There are those characterized by further comprising: a redundant configured monitoring signal generating section for group.

Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram schematically illustrating a configuration of an IPC link redundancy control device according to the present invention.

Referring to FIG. 3, the IPC link redundancy control device according to the present invention includes the A and B port Tx IPC data signals and the A and B port Rx IPC data signals input and output to the IPC link boards 307 and 307-1. A, B port Tx IPC selection signal that specifies link board active or standby status and A, B port Rx IPC selection signal that informs the operation status of active and standby link boards externally A, B Port matching circuit section 305,305-1,306,306-1, IPC processing section 301,301-1 for processing input A, B port Tx IPC data signal and output A, B port Rx IPC data signal, A, B port Tx IPC Active port selection unit (302,302-1) for receiving active signal from IPC link board and selecting active port, A, B port Rx Receives IPC selection signal and checks the presence of active link board to control redundancy Redundant status monitoring controller (303,303-1), and a redundant monitoring signal generator (304, 304-1) for generating a control signal for controlling the redundant state monitoring control unit.

Here, the IPC processing unit 301, 301-1, the active port selection unit 302, 302-1, the redundant state monitoring control unit 303, 303-1, the redundant monitoring signal generating unit 304, 304-1, and the A, B port matching circuit unit 305, 305- 1,306,306-1 are provided inside an E1 link board used as an IPC link.

Then, the operation of the IPC link redundancy control device according to the present invention having the above configuration will be described with reference to FIGS. 3 and 4. In the present invention, as in the prior art, since the E1 link board is duplexed into A and B, the description will be made only on the A side for convenience. In addition, the configuration and operation of the B side will be understood by the description of the A side.

Referring to FIG. 3, when the E1 link board is mounted, the active port selection unit 302 selects an active port, and the redundant state monitoring control unit 303 detects an Rx IPC selection signal of the active port to actively operate the E1 link. Check the board for existence. As a result, if the redundant opponent's E1 link board is active, it controls to operate in standby state, and continuously monitors the state of the active E1 link board, and if the active E1 link board fails to serve, Control to operate in this active state.

In addition, when operating in the active state, the redundant monitoring signal generating unit 304 generates different timing signals according to the positions of the slots in which the E1 link board is mounted, and the redundant state monitoring control unit 303 With the control signal input from the redundancy monitoring signal generator 304, by monitoring the Rx IPC selection signal of the port being operated in standby, the operation status of the E1 link board in standby is monitored, This prevents the E1 link board from running simultaneously.

4 is a configuration diagram showing in detail the redundant state monitoring control unit of the IPC link redundancy control device according to the present invention.

Referring to FIG. 4, the first D flip flop 401, the second D flip flop 402, the third D flip flop 403, the second D flip flop 402, and the third D flip flop 403 An AND gate 404 for logically combining the output of the OR gate 405 and an OR gate 405 for logically combining the output of the first flip-flop 401 and the output of the AND gate 404. The multiplexer 406 outputs a power supply voltage Vcc or an IPC selection signal 1 using the output as a selection signal.

Referring to the operation of the redundant state monitoring control unit configured as described above is as follows.

First, the third D flip-flop 403 of the E1 link board in standby is operated by the Rx IPC selection signal of the E1 link board in active operation, and the second D flip-flop 402 is in standby mode. When the redundancy status monitoring signal 1 supplied from the redundancy monitoring signal generator is high, the board own IPC selection signal 2 is latched to the redundancy status checking clock 1 to monitor the state of the active link board. In addition, the A and B port matching circuit input and output directions are controlled by the output of the redundant state monitoring control unit 303.

Meanwhile, in order to operate the first D flip-flop 401 of the E1 link board that is being operated in an active manner, the redundancy status check clock 2 output from the redundant monitoring signal generator 304 is operated so that the first D flip-flop 401 operates only when the link board is operated in an active manner. When the Rx IPC selection signal is latched, the operation status of the E1 link board in standby is monitored, and if there is another E1 link board in active operation, it is controlled to operate in standby. At this time, the redundant state monitoring signal 2 is used as a reset signal of the first D flip-flop 401. In the standby state, the output of the first D flip-flop 401 is set to "0" so as not to affect the value of the redundant state signal. Do not

FIG. 5 is a block diagram schematically illustrating signals generated by a redundant monitoring signal generator having a duplicated status signal value generated by a redundant status monitoring controller.

Referring to FIG. 5, the link board operation in the active state according to the value of the redundancy state signal generated by the outputs of the first, second, and third D flip-flops 401, 402, 403 and the slot position in which the E1 link board is mounted. Signals are generated for the link board operation in standby and standby states. Under the control of the generated signals, the active side and the standby side can monitor the operation status of the redundant counterpart, respectively.

As described above, according to the IPC link redundancy control device according to the present invention, both the active side and the standby side can monitor the operating state of each other's redundant link, so that both the redundant link boards It prevents loss of IPC link due to active IPC data collision and ensures that IPC link board and IPC link are always stable even in abnormal state that can occur during IPC link redundancy. It can increase stability and reliability.

Claims (2)

A plurality of matching circuits for matching input / output signals to an IPC link board, an IP processing unit for processing IP data matched by the matching circuit, an active port selecting unit for selecting an active port, and active In the redundant link board comprising a redundant state monitoring control unit for receiving the output signal of the port or standby port to monitor and control the state of the redundant link board, The redundant link board included in each of the link boards, and outputs a control signal to each of the redundant state monitoring controllers to monitor and control the operating state of the opposing link board by the redundant link board operating in standby or active, And a redundant monitoring signal generator for preventing an active operation at the same time . The method of claim 1, The redundant monitoring signal generating unit generates different timing signals in the redundant state monitoring control unit of the corresponding link board according to the value of the redundant state signal of the redundant state monitoring controller and the position of the slot in which each link board is mounted. IP link redundancy control unit.