KR19990047578A - Internal processing communication path test device of mobile communication exchange - Google Patents

Abstract

The object of the present invention is to form a 4-link PBA as a single link by forming a loop in the IPC path, which is an internal communication path between processors of the exchange, and selecting an input / output part of the IPC by controlling a maintenance register on the CLIA. In order to perform a batch test of the IPC path, the present invention provides a CLIA for performing internal processing communication, an error meter interface unit for performing an interface between the CLIA and an error meter, and a CLIA connected to an optical cable for cross connection by an optical cable. It consists of an optical cable cross connection part connecting the link of the optical interface part, and an internal processing communication path loopback connection part connected to the CLIA to loop back the internal processing communication path of the internal processing communication driver / receiver. Test time can be reduced to one quarter and test costs can be reduced. It will be good.

Description

Internal processing communication path test device of mobile communication exchange

The present invention relates to the test of the interprocessor communication (hereinafter referred to as "IPC") path of a mobile communication exchange. In particular, a 4-link PBA (loop) is formed in an IPC path, which is an internal communication path between processors of an exchange. The present invention relates to a device capable of performing a batch test of an IPC path by forming a Print Board Assembly, and selecting an input / output unit of an IPC by controlling a maintenance register on a Central Link Interface Board Assembly (CLI).

In general, a mobile communication system is a system that allows a mobile terminal to communicate while moving. A mobile switching center (MSC) of a mobile communication system requests a call processing request of a mobile terminal through a public network or a private network through a public switched telephone network (PSTN). It is a device that enables mobile communication service by transmitting to Public Switching Telephone Network (AMP) or Advanced Mobile Phone Service (AMPS) and other communication networks.

IPC communication is a technique for communicating between processors, which includes a shared storage method and a message system method. The shared storage method is to share some variable between the communicating processors and to use this shared variable to exchange information, and the message system method allows the operating system to exchange messages with the responsibility of providing communication. It is to be. IPC consists of three signals: data, alarm and clock, and has +/- pairs.

A block diagram of a conventional IPC path test apparatus for testing a path of such IPC communication includes a PBA 10 that is a board to test an IPC, which is a communication path with a processor, as shown in FIG. An interface unit 20 for performing an interface between the PBA 10 and the error measurer; Connected to the interface unit 20 is composed of an error measuring device 30 for generating and comparing digital random data to measure the bit error rate (BER) of the PBA (10).

The conventional device configured as described above was operated to test the PBA 10 in the error meter HP3764A 30 by connecting a cable to the corresponding path of the IPC to be tested.

2 is a block diagram of a CLIA PBA having four links in the related art.

As shown in the figure, the optical interface unit 111 for interfacing with the optical cable, and the IPC data and PCM (Pulse Code Modulation, PCM) in the frame of the data connected to the optical interface unit 111 and transmitted on the link Pulse code modulation) Framer function that puts voice data in each position and equips one frame, and extracts IPC data, PCM voice data and various overheads among data transmitted in the frame. A framer / reframer 112 that divides a necessary portion and performs a function, and a multiplexer / demultiplexer which is connected to the framer / reframer 112 and multiplexes or demultiplexes input data. 113); The first to fourth links 110 to 140 are connected to the multiplexer / demultiplexer 113 and include an IPC driver / receiver 114 for transmitting / receiving data.

The IPC driver / receiver 114 includes: a first IPC driver 115 for selecting and outputting transmission signals on the same side in cross point redundancy; A second IPC driver 116 for selecting and outputting transmission signals of different side sides in cross point duplication; A first IPC receiver 117 for selecting and outputting received signals on the same side in cross point redundancy; The second IPC receiver 118 selects and outputs received signals on different side sides in cross point redundancy.

The conventional CLIA is configured as such, and the conventional link PBAs used in the exchange have only one IPC path per PBA as one link PBA.

Therefore, even though the input / output stages were considered, it was not time-consuming to test four detailed paths.However, in the case of CLIA designed to accommodate four links, 16 detailed paths have one PBA because the link has four IPC paths. Will be present in.

However, when testing for each link as in the conventional 1-link PBA, the 4-link PBA has a problem that takes four times as long as the time to test the 1-link PBA.

Accordingly, the present invention has been proposed to solve the above-mentioned conventional problems, and an object of the present invention is to form a 4-link PBA as a single link by constructing a loop in an IPC path, which is an internal communication path between processors of an exchange. The present invention provides an IPC path test apparatus of a mobile communication switchboard that can perform batch test of an IPC path by controlling the maintenance register of the phase and selecting an input / output unit of the IPC.

In order to achieve the above object, the IPC path test apparatus of the mobile communication switch according to the present invention,

A CLIA performing internal processing communication; An error meter interface unit performing an interface between the CLIA and the error meter; An optical cable cross connection unit connected to the CLIA to connect a link of an optical interface unit by a cross connection by an optical cable; It is characterized in that the technical configuration consists of an IPC path loopback connection that is connected to the CLIA and loops back to the IPC path of the IPC driver / receiver.

1 is a block diagram of a conventional internal processing communication path test apparatus,

Figure 2 is a block diagram of a conventional CLIA PBA having four links,

3 is a detailed block diagram of an IPC driver / receiver in FIG. 2;

4 is a block diagram of a CLIA IPC path test apparatus to which the present invention is applied;

5 is a block diagram of an IPC path test apparatus of a mobile communication switch according to the present invention;

6 is a detailed configuration diagram of an IPC path loopback connection unit in FIG. 5;

FIG. 7 is a block diagram showing an IPC path unified connection flow of CLIA according to FIG. 5. FIG.

<Explanation of symbols for main parts of the drawings>

100: CLIA 150: error measuring instrument interface

160: optical cable cross connection 170: IPC path loopback connection

Hereinafter, an embodiment according to the technical idea of the IPC path test apparatus of the present invention configured as described above is as follows.

4 is a block diagram of a CLIA IPC path test apparatus to which the present invention is applied.

As shown therein, the CLIA 100 performs IPC communication; A CLIA control PBA (210) connected to the CLIA (100) and a Telephony Device Bus (TD-BUS) to control the CLIA (100); A terminal 220 connected to the CLIA control PBA 210 and a RS232C (Recommended Standard-232C) to perform an error measurement control command; An error meter interface PBA 210 for performing an interface between the CLIA 100 and the error meter 220; The error meter interface PBA 230 is connected to the error meter 240 for generating and comparing digital random data to measure the BER of the CLIA 100.

5 is a block diagram of an IPC path test apparatus of a mobile communication switch according to the present invention.

As shown therein, the CLIA 100 performs internal processing communication; An error meter interface unit 150 for performing an interface between the CLIA 100 and the error meter 240; An optical cable cross connection unit 160 connected to the CLIA 100 to connect a link of the optical interface units 111, 121, 131, and 141 by cross connection by an optical cable; An IPC path loopback connection unit 170 is connected to the CLIA 100 to loop back and connect the IPC paths of the IPC drivers / receivers 124, 134, and 144.

The operation of the IPC path test apparatus of the mobile communication switch according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, the error measuring instrument interface unit 150 is configured as an IPC cable in the same way as when testing a single single link in the prior art. The error measuring instrument (HP3764A Digital Transmission Analyzer) 240 is a test equipment for the IPC driver / receiver 114. Connect with In addition, the optical cable cross connection unit 160 connects the light input / output part of each link including the transmission part TX and the reception part RX with a nearby link instead of a loopback. That is, the output of the optical interface 111 of the first link 110 is the input of the optical interface 121 of the second link 120, and the output of the optical interface of the second link 120 is the third link ( The input of the optical interface 131 of the 130 and the output of the optical interface 131 of the third link 130 as the input of the optical interface 141 of the fourth link 140, and the fourth link 140. ) Is used as the input of the optical interface 111 of the first link 110.

Also, as illustrated in FIG. 6, the IPC path loopback connection unit 170 loops back the IPC paths of the IPC drivers / receivers 124, 134, and 144 of the second to fourth links 120 to 140. Let's do it. That is, the first IPC receiver 117 stores the clocks TXC + and Transport Clock +, data TXD + and Transport Data +, and alarms TXA + and Transport Alarm + of the first IPC driver 115 of the second link 120, respectively. Clock (RXC +, Receive Clock +), data (RXD +, Receive Data +) and alarm (RXA +, Receive Alarm +), and the clock (TXC-, Transport Clock-) of the second IPC driver 116). And the data (TXD-, Transport Data-) and alarms (TXA-, Transport Alarm-) and the clock (RXC-, Receive Clock-) and data (RXD-, Receive Data-) of the second IPC receiver 118, respectively. Set the alarm (RXA-, Receive Alarm-) as input. This is similarly performed for the IPC driver / receiver 134 and 144 of the third and fourth links 130 and 140.

The signal processing path in CLIA 100 by this connection is shown in FIG.

In this way, if a user configures a single path and the user wants to test the IPC path of the CLIA 100 through the terminal 220, the test data of the error measuring instrument 240 is as if the test of one link in the CLIA (100). Four links can be batch tested.

At this time, the maintenance register of the CLIA 100 is set to control the transmission enable of the IPC driver and the reception enable of the IPC receiver, and cross the first IPC driver 115 which selects and outputs transmission signals of the same side. In the point duplication, a test is performed by setting a first IPC receiver 117 that selects and outputs received signals on the same side. And a second IPC driver 116 for selecting and outputting transmission signals of different side sides in cross point redundancy and a second IPC receiver 118 for selecting and outputting reception signals of different side sides in cross point redundancy. By proceeding with the test, the IPC path on the entire CLIA 100 including the termination will be able to be tested.

As described above, the IPC path test apparatus of the mobile communication switch according to the present invention forms a 4-link PBA as a single link by forming a loop in the IPC path, and controls the maintenance register on the CLIA to input / output of the IPC. By selecting the unit, batch testing of the IPC path can be performed to reduce the test time to one quarter, thereby reducing the test cost.

Claims (1)

In an exchange of a mobile communication system that allows communication while moving, A central link interface board assembly (CLI) for performing internal processing communication; An error meter interface unit performing an interface between the CLIA and the error meter; An optical cable cross connection unit connected to the CLIA to connect a link of an optical interface unit by a cross connection by an optical cable; And an internal processing communication path loopback connection unit connected to the CLIA to loop back and connect an internal processing communication path of the internal processing communication driver / receiver.