KR20000031016A - Line card double device of base station controller in mobile communication system. - Google Patents

Abstract

PURPOSE: A line card double device is provided for the subsidiary line card substituting the movement of line card when an obstacle is occurred. CONSTITUTION: The line card double device prepares for subsidiary line card acting with a plurality of line card indentically. If an obstacle is immured at the specific line card, the device cuts the transceiver signal line between line card and signal, and connects with subsidiary line.

Description

Line Card Redundancy Device of Base Station Controller in Mobile Communication System

The present invention relates to a base station controller of a mobile communication system, and more particularly to duplication of a line card.

The elements constituting the mobile communication system include a base transmission station that is in charge of wireless communication with mobile stations and a base station controller that performs call mobility management related to call processing. And, it can be divided into the base station control period or the mobile switch for the transmission and reception path of the data and control signals with other communication networks and the base station manager responsible for the operation and maintenance of the entire mobile communication system.

1 is a diagram illustrating a general base station controller.

The central processing unit 140 controls the overall operation of the base station controller 100. Under the control of the central processing unit 140, the switch unit 120 transmits various data and control signals transmitted from the first base station 111 to the Nth base station 11N to the line card unit 130 and the central processing unit 140. Connect to In addition, the switch unit 120 forms a signal path between the base stations under the control of the central processing unit 140. The line card unit 130 decodes the various data and control signals received from the first base station 111 to the Nth base station 11N and transmits the decoded data and control signals to the public network through the mobile switch 150. Alternatively, the line card unit 130 encodes the various data and the control signal received from the mobile switcher 150 and outputs the encoded data to the first base station 111 to the Nth base station 11N through the switch unit 120. The line card unit 130 is composed of a set number of line cards, and each line card is responsible for a set number of signal lines to which various data and control signals are transmitted / received. A digital signal processing processor (not shown) included in the line card unit 130 performs encoding and decoding operations of various data and control signals.

On the other hand, with the recent high performance digital signal processing processor, each of the line cards can process a large amount of signal lines. However, when the line card fails, many subscribers corresponding to the large signal lines do not receive the service.

Accordingly, it is an object of the present invention to provide an auxiliary line card instead of the operation of a faulty line card.

In accordance with one aspect of the present invention, there is provided a line card duplexing apparatus of a base station controller in a mobile communication system, comprising a plurality of line cards for performing encoding and decoding operations of a voice signal, a mobile switch connected to a public network, and the respective lines. A plurality of signal matching units for interfacing the format of the voice signal transmitted / received between the cards, and the same configuration as that of the line card, and in case of a failure of a specific line card, each line under control of the central controller of the base station controller. It alternates the path of the voice signal transmitted and received between the card and the signal matching unit, and characterized in that it consists of an auxiliary line card to perform in place of the operation of the line card that has failed.

1 is a diagram illustrating a general base station controller.

2 is a block diagram illustrating a line card unit according to an exemplary embodiment of the present invention.

3 shows a line card according to an embodiment of the invention.

Figure 4 is a diagram showing the internal configuration of the switching portion of the auxiliary line card according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In the following description of the present invention, detailed descriptions of related well-known functions or configurations are omitted when it is determined that the detailed description may unnecessarily obscure the subject matter of the present invention.

2 is a block diagram of a line card unit according to an exemplary embodiment of the present invention. A description with reference to FIG. 1 is as follows.

The line card unit 130 includes a first line card 211 to an Mth line card 21M, a first signal matching unit 221 to an Mth signal matching unit 22M, and an auxiliary line card 210. The first signal matching unit 221 to the M-th signal matching unit 22M is connected between the public network (not shown) connected via the mobile switch 150 and the first line card 211 to the M-th line card 21M, Interfaces voice signals transmitted and received. The first signal matching unit 221 to the M-th signal matching unit 22M converts the voice signal output from the first line card 211 to the M-th line card 21M into a data format corresponding to the public network, thereby switching the mobile switch 150. To send). The first signal matching unit 221 to the Mth signal matching unit 22M are output from the mobile switch 150 and convert the voice signal of the data format corresponding to the public network into PCM data to convert the first line card 211 to the first line. Output to M line card 21M.

And, as shown, the auxiliary line card 210 is connected to the Tx, Rx audio signal lines of each of the first line card 211 to the M-th line card 21M. When a failure occurs in a specific line card among the first line card 211 to the Mth line card 21M, the central processing unit 140 switches the voice signal line of the input / output line card of the failing line card. Under the control of the central processing unit 140, the auxiliary line card 210 performs the operation of the failing line card.

3 is a diagram illustrating a line card according to an embodiment of the present invention. Hereinafter, a description will be given with reference to FIGS. 1 and 2.

The first line card 211 to Mth line card 21M and the auxiliary line card 210 have the same structure. Therefore, other line cards other than the first line card 211 shown in FIG. 3 will be omitted.

The digital signal processor 351 to the digital signal processor 35L perform an operation of encoding or decoding an input voice signal. The time switch unit 340 forms a time channel of an audio signal input / output from the digital signal processing units and switches a time channel according to a call request of a subscriber. In particular, since the time switch unit 340 is embedded in the first line card 211, it is possible to ensure high reliability of the first line card 211. That is, since each of the first line card 211 to the Mth line card 21M has a built-in time switch unit, when a specific line card fails, the failed line card affects the other line cards. Does not give.

The controller 360 controls the overall operation of the first line card 211. The controller 360 interfaces voice signals and various control signals between the digital signal processor 351 to the digital signal processor 35L and a switch unit (not shown). In particular, when a failure occurs in the first line card 211, the control unit 360 is output from the central processing unit 140 and inputs an error blocking signal, which will be described later, to the switching unit 320 through an internal bus.

The switching unit 320 provides a path of the Rx voice signal Tx voice signal input / output between the first signal matching unit 211 and the time switch unit 340. In addition, the switching unit 320 performs an operation of blocking a path of the Tx voice signal input from the time switch unit 340 and output to the first signal matching unit 211 according to the error blocking signal.

The clock signal distributor 310 outputs the clock signal to the switching unit 320 and the digital signal processor 351 to the digital signal processor 35L. The switching unit 320 outputs the clock signal to the first signal matching unit 211.

4 is a diagram illustrating an internal configuration of a switching unit of the auxiliary line card 220 according to an embodiment of the present invention.

Hereinafter, the operation of the switching unit 400 by the control signal output from the central processing unit 140 when the fault line card occurs with reference to FIGS.

As shown, the M number of Rx audio signal lines output from the first signal matching unit 221 to the Mth signal matching unit 22M are connected to the multiplexing unit 415. In addition, the Rx signal line output from the multiplexer 415 is connected to a time switch unit (not shown) provided in the auxiliary line card 210. The M number of Tx voice signal lines output from the demultiplexer 435 are connected to the first signal matching unit 221 to the Mth signal matching unit 22M, respectively.

The line card identification number detector 430 detects the identification number of the auxiliary line card 220 and outputs the identification number to the comparator 445. When the first line card 211 to the Mth line card 21M operate normally, the comparator 445 is connected to the tri-state gate of the output terminal of the multiplexer 415 based on the input identification number. In addition, the M tri-state gates provided at the output terminals of the demultiplexer 435 block the paths of the input / output voice signals.

However, in this case, when a failure occurs in the first line card 211, the central processing unit 140 detects this and outputs the error blocking signal to the switching unit 320 of FIG. The error blocking signal blocks the path of the Tx voice signal by controlling the tri-state gate of the output terminal of the demultiplexer (not shown) provided in the switching unit 320. The central processing unit 140 outputs a corresponding control signal including a driving signal and a line selection signal to a controller (not shown) of the auxiliary line card 210. The controller of the auxiliary line card 210 outputs the control signals to the switching unit 400.

When the driving signal is input from the control unit, the comparator 445 may include tri-state gates of the output terminal of the multiplexer 415 and M tri-states respectively provided at the output terminals of the demultiplexer 435. The gate is controlled to form a path of an input / output voice signal. The selector 420 inputs a line selection signal and a corresponding control signal from the controller to select a corresponding line from the M number of Rx voice signal lines and Tx voice signal lines. At this time, the selected lines are Rx # 1 and Tx # 1.

The clock signal distributor 410 provided in the auxiliary line card 220 outputs a clock signal by the driving signal. In addition, by the line selection signal, the demultiplexing logic unit 450 outputs the clock signal to the signal matching unit.

1 to 4, the auxiliary line card 220 according to an embodiment of the present invention, when a failure occurs in a specific line card, between the failure line card and the corresponding signal matching unit by a control signal of the central processing unit Switch the input / output audio signal. And the auxiliary line card 220 performs in place of the operation of the failing line card.

As described above, the auxiliary line card of the base station controller according to the present invention has an advantage in that when a failure occurs in a specific line card, it can provide a continuous service to subscribers by performing in place of the operation of the failing line card.

Claims (5)

A line card redundancy device of a base station controller in a mobile communication system, A line card composed of a plurality of lines and performing encoding and decoding operations of speech signals; A plurality of signal matching units for interfacing a format of a voice signal transmitted / received between a mobile switch connected to a public network and the respective line cards; Has the same configuration as the line card, when a failure occurs in a specific line card, the path of the audio signal transmitted and received between each line card and the corresponding signal matching unit under the control of the central control unit of the base station controller is switched, Apparatus characterized in that it consists of a secondary line card that performs in place of the operation of the faulty line card. According to claim 1, wherein each of the line card, And a time switch unit for separately forming a time channel of an audio signal input / output from the corresponding signal matching unit, so that a failure of a specific line card does not affect other line cards. The method of claim 2, wherein each of the line cards, And, when a failure occurs, cuts off a path of a T-X audio signal line output to a corresponding signal matching unit by an error blocking signal of the central controller. The method of claim 3, wherein the auxiliary line card, A multiplexer for inputting a plurality of R-X voice signal lines respectively output from the plurality of signal matching units, and a demultiplexer for outputting a plurality of T-X voice signal lines respectively output to the plurality of signal matching units, And when an error occurs in a specific line card, an R-X audio signal line and a T-X audio signal line corresponding to the failed line card are selected by a line selection signal of the central controller. The method of claim 4, wherein the auxiliary line card, The circuit is characterized in that it does not normally operate by the line card identification unit provided in the base station controller, but operates when a failure occurs and a driving signal is input from the central controller.