KR100231776B1 - Switching for inter processor communication path in personal communication system - Google Patents

Abstract

The present invention relates to an interprocessor communication path of a personal mobile communication exchange, and in particular, generates a power alarm signal immediately upon powering off of a central link interface or a local link interface, and transmits the power alarm signal to the other local link interface or the other central link interface. This power alarm signal detects a fault at the opposite local link interface or the opposite central link interface and immediately switches over to an uninterrupted inter-processor communication path to prevent the inflow of random data to prevent the system from crashing. will be.

Description

Interprocessor communication path switching device of personal mobile communication exchange

The present invention relates to a personal mobile communication exchange, and more particularly, to an apparatus for switching an interprocessor communication path upon powering off of a link interface constituting a data link in interprocessor communication of a personal mobile communication exchange.

In general, a personal mobile communication exchange operates with a man-machine processor that accepts and transmits data to a subscriber, a main processor that processes subscriber data received from the man-machine processor, and data processed by the main processor. And an operation / maintenance processor that performs a maintenance function, and processes the subscriber's data input from the man-machine processor in the main processor to operate the system in the operation / maintenance processor. To do this, data must be sent and received between processors. Accordingly, the personal mobile communication exchange additionally includes an interprocessor communication path so as to transmit and receive data between processors.

Such an inter-processor data communication path is shown in FIG. 1.

As shown, the exchange node processor communication node unit 10 for transmitting the data of the operation / maintenance processor to the subscriber side and the data of the subscriber side to the operation / maintenance processor, and the communication node unit 10 between the exchange office processor And a central link interface unit 20 for transmitting data transmitted from the local link interface unit 30 to the local link interface unit 30 and transferring the data transmitted from the local link interface unit 30 to the inter-processor communication node unit 10. Local link for transmitting the data transmitted from the central link interface 20 to the processor communication node 40 and the data transmitted from the processor communication node 40 to the central link interface 20 The interface unit 30 and the data transmitted from the local link interface unit 30 to the main processor It consisted of a processor node communication part 40, which carries data to be transmitted from the processor to the local link interface unit (30).

In the above, the exchange node inter-processor communication node unit 10, the central link interface unit 20, the local link interface unit 30 and the processor communication node unit 40 are each implemented in redundancy.

In addition, between the inter-processor communication node unit 10 and the central link interface unit 20, and between the local link interface unit 30 and the processor communication node unit 40 is composed of cross-point redundancy.

The switching operation of the inter-processor communication path when the power is turned off by the central link interface 20 or the local link interface 30 among the processor-to-processor communication paths configured as described above is as follows.

First, when the first switching center interprocessor communication node 11, the first central link interface 21, the first local link interface 31 and the first processor communication node 41 operate in an active state, When the power is turned off in the link interface 21, the power descends in earnest, and data transmitted to the first local link interface 31 in the local link interface unit 30 is in an error state. Thus, the first local link interface 31 receives the data in the error state, recognizes the alarm state, and transmits the alarm signal to the first processor communication node 41. Then, the first processor communication node 41 switches the communication path between processors to a path where no alarm is generated. Thus, the second local link interface 32 and the second central link interface 22 operate.

On the other hand, when the first switching center interprocessor communication node 11, the first central link interface 21, the first local link interface 31 and the first processor communication node 41 operate in an active state, the first local link When the power is turned off at the interface 31, the power descends in earnest, and the data transmitted to the first central link interface 21 is in an error state. In this way, the first central link interface 21 recognizes the alarm state and transmits the alarm signal to the communication node 11 between the first switching center processors. The first switching center interprocessor communication node 11 then switches the interprocessor communication path to a path where no alarm has occurred. Thus, the second central link interface 22 and the second local link interface 32 operate.

In addition, in the case of a time division exchange in which the transmission rate of interprocessor communication data is set to 2 Mbps, the amount of random data flowing in at the time of power-off is not large, which does not cause fatal damage to the system. However, in the case of a personal portable communication switch having a transmission rate of 8 Mbps of interprocessor communication data, the amount of random data flowing in at the time of power-off is greatly increased, thereby blocking the inter-processor communication path and causing the system to crash.

Therefore, the conventional processor-to-processor communication path switching device of the personal portable communication switch exchanges a lot of random data due to the failure of switching the processor-to-processor communication path immediately when the power-off causes the entire system to be shut down by blocking the communication path between the processors. There was a problem.

In addition, there is a problem that significantly reduces the stability of the system, such as a system down due to blockage of the communication path between processors.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, and in particular, generates a power off alarm signal upon power off of a link interface constituting a data link, and detects the power off alarm signal at a partner link interface and The present invention provides a "interprocessor communication path switching device of a personal handheld communication exchange" which can improve the stability by immediately switching the communication path between the devices.

Technical means for achieving the above object,

A first central to generate a power alert signal immediately upon power off and to generate a control signal to the first and second switching center inter-processor communication nodes to detect a failure of the counterpart first local link interface and to switch the inter-processor communication path A link interface; A first switching center interprocessor communication node for switching under the control of the first central link interface to an uninterrupted interprocessor communication path such that a large amount of random data that causes the system to shut down is not introduced; A first local link interface that immediately generates a power alert signal upon power off and generates control signals to the first and second processor communication nodes to sense a failure of the first central link interface and to switch the communication path between processors; Wow; A first processor communication node for switching under a control of the first local link interface to an interprocessor communication path in which a failure does not occur, so that a large amount of random data is not introduced; A second central link interface generating a power alert signal upon power off and generating control signals to the first and second switching center inter-processor communication nodes to detect a failure of the counterpart second local link interface to switch the inter-processor communication path; Wow; A second switching center interprocessor communication node which switches under the control of the second central link interface to an interprocessor communication path in which a failure does not occur, so that random data does not flow in; A second local link interface generating a power alert signal upon power off and generating control signals to the first and second processor communication nodes to sense a failure of the second central link interface and to switch the communication path between processors; The second processor communication node is configured to switch under the control of the second local link interface to a communication path where no failure occurs so that random data does not flow.

1 is a block diagram of a communication path between processors in a conventional personal mobile communication exchange;

2 is a block diagram of an interprocessor communication path switching device of the personal mobile communication exchange according to the present invention;

3A is a block diagram illustrating a failure signal detection unit of FIG. 2;

3B is a block diagram of the communication path switching controller of FIG. 2.

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

10: communication node inter-processor communication node 20: central link interface

30: local link interface unit 40: processor communication node unit

100,150: communication node between the first and second switching center processor

200,250: first and second central link interfaces

300,350: first and second local link interfaces

400,450: first and second processor communication node

Hereinafter, the configuration and operation of an embodiment according to the technical spirit of the present invention "interprocessor communication path switching device of a personal portable communication exchange" will be described with reference to the accompanying drawings.

<Example>

First, the embodiment configuration of the interprocessor communication path switching device of the personal mobile communication exchange generates a power alarm signal when the power is off, detects a failure of the counterpart first local link interface 300, and switches the interprocessor communication path. A first central link interface 200 for generating control signals to the first and second inter-processor communication nodes 100 and 150; A first switching center interprocessor communication node (100) for switching under a control of the first central link interface (200) to a communication path in which no failure occurs; Generates a power alert signal when the power is off and transmits a control signal to the first and second processor communication nodes 400 and 450 to sense a failure of the first central link interface 200 to switch the communication path between processors. Generating a first local link interface 300; A first processor communication node (400) for switching under a control of the first local link interface (300) to a communication path in which no failure occurs; A power alarm signal is generated when the power is turned off, and a control signal is transmitted to the first and second switching center interprocessor communication nodes 100 (150) to detect a failure of the second local link interface 350 at the other end and to switch the communication path between the processors. A second central link interface 250 occurring at A second switching center interprocessor communication node (150) for switching under a control of the second central link interface (250) to an uninterrupted communication path; Generates a power alert signal when the power is off and transmits a control signal to the first and second processor communication nodes 400 and 450 to detect a failure of the second central link interface 250 to switch the communication path between processors. Generating a second local link interface 350; The second processor communication node 450 is configured to be redundant by switching to the communication path without failure in accordance with the control of the second local link interface 350.

In the above description, the first and second central link interfaces 200 and 250 and the first and second local link interfaces 300 and 350 may include a failure signal detection unit that detects a power alarm signal when the magnetic link interface is powered off. And a communication path switching controller configured to generate a control signal to receive a failure signal from the counterpart link interface to switch the communication path between processors. (Herein, the first and second central link interfaces 200 and 250 and the first and second local link interfaces 300 and 350 are referred to as link interfaces, respectively.)

The fault signal detector may include a power alarm signal detector 202 for detecting a power alarm signal generated at power off, and an alarm signal different from the power alarm signal output from the power alarm signal detector 202. The fault signal collecting unit 204 and the fault signal output unit 206 for transmitting the fault signal output from the fault signal collecting unit 204 to the opposite link interface.

In addition, the power alarm signal detection unit 202 is composed of a de-flip flop 201 latching the corresponding input voltage in accordance with the clocking of the power alarm signal generated when the power off, the fault signal collecting unit 204 is And a logic sum element 203 which combines the signals output from the flip-flop 201 with other alarm signals.

The communication path switching controller may include a relative failure detection unit 321 for detecting a failure state using a failure signal transmitted from the failure signal detection unit, and a failure signal output from the relative failure detection unit 321 between the corresponding switching center processors. It is composed of a failure transmitting unit 322 for transmitting to the communication node or the processor communication node.

The operation of the inter-processor communication path switching device of the personal mobile communication exchange configured as described above is as follows.

First, when the first switching center interprocessor communication node 11, the first central link interface 21, the first local link interface 31 and the first processor communication node 41 operate in an active state, Upon powering off at the link interface 200, the power alert signal is changed to a low signal and then to a high signal. Thus, the flip-flop 201 in the fault signal detecting unit 210 latches the high signal in accordance with the clocking of the power alarm signal, and the logic sum element 203 logically combines the high signal and the other fault signal to obtain a result value. The high signal is transmitted to the fault signal transmitter 206. Then, the fault signal transmitter 206 transmits the detected fault signal to the communication path switching controller 320 in the first local link interface 300.

Thus, the relative failure detection unit 321 in the communication path switching control unit 320 receives a failure signal and detects that a failure has occurred in the first central link interface 200. The processor 2 transmits a failure signal to the communication nodes 400 and 450. Accordingly, the first processor communication node 400 receives the failure signal and immediately switches to the interprocessor communication path to the second local link interface 350 where the failure does not occur. Thus, even when the first central link interface 200 is powered off, the inter-processor communication path is immediately changed through the power alarm signal, so that data can be normally transmitted and received between the main processor and the operation / maintenance processor in the personal communication switch. Will be.

Meanwhile, the first local link interface 300 immediately generates a power alert signal when the power is off. Then, the fault signal detecting unit 310 in the first local link interface 300 collects the power alarm signal through the fault signal collecting unit, and collects the collected power alert signal in the first central link interface 200 through the fault signal transmitting unit. It is sent to the communication path switching controller 220.

Thus, the relative failure detection unit in the communication path switching control unit 220 detects a failure of the first local link interface 300 and fails to the communication node 100 and 150 between the first and second switching center processors through the failure transmission unit. It will send a signal. Accordingly, the first inter-processor communication node 100 is immediately switched to the inter-processor communication path to the second central link interface 250 which has not failed. Accordingly, data can be normally communicated between the main processor and the operation / maintenance processor in the personal mobile communication exchange.

As described above, the present invention "interprocessor communication path switching device of the personal mobile communication exchange", in particular, immediately generates a power alarm signal when the power off of one link interface to detect this power alarm signal on the other side link interface. And by immediately switching between processor-to-processor communication paths, there is an effect of preventing the entire system from crashing with a large amount of random data inflow.

In addition, the inter-processor communication is normally performed by immediately switching to an inter-processor communication path in which a failure does not occur when one link interface is powered off.

Claims (18)

In the processor-to-processor communication path device implemented with redundancy in a personal mobile communication switch, The first and second switching center inter-processor communication node 100 generates a power alert signal immediately when the power is turned off, and transmits a control signal to detect a failure of the counterpart first local link interface 300 to switch the communication path between the processors. A first central link interface 200 occurring at 150; A first switching center interprocessor communication node (100) for switching to an interprocessor communication path in which a failure does not occur under the control of the first central link interface (200); The first and second control signals are generated to immediately generate a power alarm signal when the first local link interface 300 is turned off, and detect a failure of the first central link interface 200 to switch the communication path between processors. A first local link interface 300 occurring to the processor communication node 400 and 450; A first processor communication node (400) for switching to an interprocessor communication path in which a failure does not occur under the control of the first local link interface (300); A power alarm signal is generated when the second central link interface 250 is powered off, and a control signal is transmitted to the first and second switching center processors to detect a failure of the counterpart second local link interface 350 to switch the communication path between the processors. A second central link interface 250 occurring between the intercommunication nodes 100 and 150; A second switching center interprocessor communication node (150) for switching to an interprocessor communication path in which a failure does not occur under the control of the second central link interface (250); Generates a power alarm signal when the second local link interface 350 is powered off, detects a failure of the second central link interface 250, and transmits a control signal to switch the communication path between the first and second processor. A second local link interface 350 occurring at nodes 400 and 450; And a second processor communication node (450) for switching to a communication path in which no failure occurs under the control of the second local link interface (350). The method of claim 1, wherein the first central link interface 200, When the power is off, a failure signal detection unit 210 which immediately generates a power alert signal, detects the power alert signal, and transmits the detected power alert signal to the second local link interface 300, and receives a failure signal from the second local link interface 300. And a communication path switching control unit 220 for detecting a failure of the second local link interface 300 and generating a control signal to switch to a communication path between processors in which a failure does not occur. Interprocessor communication path switching device. The method of claim 2, wherein the failure signal detection unit 210, The power alarm signal detector 202 detects a power alarm signal immediately generated when the first central link interface 200 is powered off, and is different from the power alarm signal output from the power alarm signal detector 202. A fault signal collecting unit 204 for collecting an alarm signal and a fault signal transmitting unit 206 for transmitting a fault signal output from the fault signal collecting unit 204 to the first local link interface 300. An interprocessor communication path switching device of a personal mobile communication exchange (100). The method of claim 3, wherein the power alarm signal detecting unit 202 is a deflip-flop latching the corresponding input voltage in accordance with the clocking of the power alarm signal immediately generated when the first central link interface 200 is powered off ( And an inter-processor communication path switching device of a personal mobile communication exchange (201). 4. The logic unit 203 of claim 3, wherein the fault signal collecting unit 204 is a logic sum element 203 that combines and collects an alarm signal different from the signal output from the flip-flop 201 in the power alarm signal detecting unit 202. The inter-processor communication path switching device of the personal mobile communication switch characterized in that it is configured. The method of claim 2, wherein the communication path switching control unit 220, A relative failure detection unit 221 for detecting a failure state of the first local link interface 300 by a failure signal transmitted from the failure signal detection unit 310 in the first local link interface 300, and the relative failure detection; And a fault transmitter 222 which transmits a control signal to the inter-processor communication nodes 100 and 150 so as to switch the communication path between the processors by receiving the fault signal from the unit 221. The interprocessor communication path switching device of the personal mobile communication exchange. The method of claim 1, wherein the second central link interface 250, When the power is turned off, a fault signal detection unit 260 which immediately generates a power alert signal, detects the power alert signal, and transmits the detected power alert signal to the second local link interface 350, and receives a fault signal from the second local link interface 350. And a communication path switching control unit 270 for detecting a failure of the second local link interface 350 and generating a control signal to switch to a communication path between processors in which a failure does not occur. Interprocessor communication path switching device. The method of claim 7, wherein the failure signal detection unit 260, A power alarm signal detection unit for detecting a power alarm signal immediately generated when the second central link interface 250 is powered off, and a fault for collecting an alarm signal different from the power alarm signal output from the power alarm signal detection unit; And a fault signal transmitter for transmitting a fault signal output from the fault signal collector to the second local link interface (350). 10. The method of claim 8, wherein the power alarm signal detecting unit is configured as a flip-flop latching the corresponding input voltage according to the clocking of the power alarm signal immediately generated when the second central link interface 250 is powered off. The interprocessor communication path switching device of the personal mobile communication exchange. The method of claim 7, wherein the communication path switching control unit 270, A relative failure detection unit for detecting a failure state of the second local link interface 350 by a failure signal transmitted from the failure signal detection unit 360 in the second local link interface 350, and a failure from the relative failure detection unit. Inter-processor communication path of the personal portable communication switch, characterized in that the failure transmission unit for transmitting the control signal to the first and second switching center inter-processor communication node (100, 150) to receive the signal to switch the communication path between processors. Switching device. The method of claim 1, wherein the first local link interface 300, When the power is off, a power alarm signal is generated immediately, and a failure signal detection unit 310 which detects the power alarm signal and transmits it to the first center link interface 200 and a failure signal from the first center link interface 200 are provided. And a communication path switching control unit 320 for detecting a failure of the first central link interface 200 and generating a control signal to switch to a communication path between processors in which a failure does not occur. Interprocessor communication path switching device. The method of claim 11, wherein the failure signal detection unit 310, Power alarm signal detection unit for detecting a power alarm signal immediately generated when the power off of the first local link interface 300, and failure to collect a different alarm signal and the power alarm signal output from the power alarm signal detection unit And a fault signal transmitter for transmitting a fault signal output from the fault signal collector to the first central link interface (200). The power alarm signal detecting unit of claim 12, wherein the power alarm signal detecting unit is configured to have a flip-flop that latches a corresponding input voltage according to clocking of a power alarm signal that is generated immediately when the first local link interface 300 is powered off. The interprocessor communication path switching device of the personal mobile communication exchange. The method of claim 11, wherein the communication path switching control unit, A relative failure detection unit for detecting a failure state of the first central link interface 200 by a failure signal transmitted from the failure signal detection unit 210 in the first central link interface 200, and a failure from the relative failure detection unit. Inter-processor communication path switching device of the personal mobile communication switch, characterized in that it comprises a fault transmitting unit for transmitting a control signal to the first and second processor communication node 400, 450 so as to receive a signal to switch the communication path between processors. . The method of claim 1, wherein the second local link interface 350, The fault signal detector 360 generates a power alert signal immediately upon power-off, detects the power alert signal, and transmits the fault signal from the second center link interface 250 to the second center link interface 250. And a communication path switching control unit 370 for detecting a failure of the second central link interface 250 and generating a control signal to switch to a communication path between processors in which a failure does not occur. Interprocessor communication path switching device. The method of claim 15, wherein the failure signal detection unit, A power alarm signal detecting unit for detecting a power alarm signal immediately generated when the second local link interface 350 is powered off, and a fault for collecting an alarm signal different from the power alarm signal output from the power alarm signal detecting unit. And a fault signal transmitter for transmitting a fault signal output from the fault signal collector to the second central link interface (250). 17. The method of claim 16, wherein the power alarm signal detection unit is configured as a flip-flop to latch the corresponding input voltage in accordance with the clocking of the power alarm signal generated immediately when the power off of the second local link interface 350. The interprocessor communication path switching device of the personal mobile communication exchange. The method of claim 15, wherein the communication path switching control unit 370, A relative failure detection unit for detecting a failure state of the second central link interface 250 by a failure signal transmitted from the failure signal detection unit 260 in the second central link interface 250, and a failure from the relative failure detection unit; Inter-processor communication path switching device of the personal mobile communication switch, characterized in that it comprises a failure transmitting unit for transmitting a control signal to the first and second processor communication node 400, 450 to receive a signal to switch the communication path between processors. .

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