KR100234832B1 - Mobile communication system base station test equipment and its function configuration method - Google Patents

Abstract

The present invention, in the configuration of the transmission and reception test path for configuring the base station test apparatus, a base station having a structure that can be commonly applied to a duplex type system in which the transmission and reception antennas are separated and the transmission and reception are configured through the same antenna. A test apparatus and a method for configuring a function for each path of a base station test apparatus of a mobile communication system. That is, the present invention relates to a structure of a test apparatus for checking abnormal lubrication of a base station system and a configuration method thereof.

The present invention, in the test apparatus of the base station separated from the transmission and reception in the mobile communication system,

TX-PATH comprising three antennas;

RX-PATH_A including three antennas;

RX-PATH_B including three antennas;

A first RFIU connected with the TX-PATH;

A second RFIU connected with the RX-PATH_A;

A third RFIU connected with the RX-PATH_B;

First three-way couplers connected in parallel with the first to third RFIUs, respectively;

The three-way coupler through a variable attenuator capable of controlling path loss by external control,

Switch control / variable attenuator controls and

SP3T switches connected in parallel with each of the first to third RFIUs;

Parallel connected PTMU; And

It is characterized in that it comprises the MXBB to supply the +27 volts to the system +5 volts and -12 volts.

In still another aspect of the present invention, in a duplex base station test apparatus for a mobile communication system,

With three antennas α -Sector;

With three antennas β -Sector;

With three antennas γ -Sector;

remind α A first RFIU associated with the sector;

remind β A second RFIU associated with the sector;

remind γ A third RFIU associated with the sector;

First three-way couplers connected in parallel with the first to third RFIUs, respectively;

The three-way coupler through a variable attenuator capable of controlling path loss by external control,

Switch control / variable attenuator controls and

SP3T switches connected in parallel with each of the first to third RFIUs;

Parallel connected PTMU; And

It is characterized in that it comprises the MXBB to supply the +27 volts to the system +5 volts and -12 volts.

In still another aspect of the present invention, there is provided a functional configuration method of a base station test apparatus of a mobile communication system.

Applying one sector of the system output to each basic structure of the RFIU;

Sampling the output of the system at the D / C;

Switch connected to the antenna, second three-way coupler, two-way splitter and SP3T

Pass through the switch to TPDB (Transmit Power Detect Board),

Through the first three-way coupler and the variable attenuator in the two-way splitter

Delivering to a Test Mobile (TM); And

Adjusting the RF signal of the transmission and reception path to the appropriate size through the attenuator

Duplex that includes a system and uses both a transmitting and receiving antenna

A first process applied in the case of a system; And

Applying a transmit path and a receive path of the system to the RFIU;

Equally setting signal flows of the transmission and reception paths;

Setting a signal flow of the reception path in a direction opposite to the transmission path; And

This includes the steps of turning the switch on and off according to the configuration of the system.

Is applied to a system using a separate antenna.

With 2nd course

It is characteristic that it is made.

Description

Mobile communication system base station test equipment and its function configuration method

The present invention relates to a base station test apparatus for checking the abnormality of the CDMA cellular and PCS base station system and its function configuration method. In particular, the present invention relates to a test apparatus that can be commonly applied to a system using a transmitting and receiving antenna in common and a system using a separate transmitting and receiving antenna.

The conventional base station test apparatus has a structure suitable for a test of a base station system in which transmitting and receiving antennas are separated, and thus cannot be applied to inspection and testing of a base station system using a transmitting and receiving antenna in common.

1 is a diagram showing the configuration of a conventional mobile communication system base station test apparatus as described above. In the structure of the conventional base station test apparatus, the transmission / reception path was divided by a duplexer. In addition, since the duplexer passes a signal only in each transmission and reception frequency band, the duplexer cannot basically use a transmission / reception path together.

Looking at the signal path of the conventional test apparatus, the transmission path connected to the transmission antenna is detected by the forward (FWD) and reverse (RFL) signal through the TXDC, the forward signal is a signal through the two-way splitter (2 WAY SPLITTER) Distributed, one connected to the TPDU to detect the transmit power, and the other signal to the test terminal (TMSU) via the transmit path (TX) and duplexer. The signal transmitted through this path provides basic transmission information for breathing with the system.

Looking at the reception path, the signal transmitted from the test terminal (TMSU) is separated from the transmission path through the duplexer and transmitted only to the reception path side (RX), and then divided into two paths-the structure of the system, the multipath (Diversity) Effect-Signals are delivered to the system through RXDE FWD and RFL on each receive path.

Through this process, TMSU delivers basic information for a call to the system. A variable attenuator is used for each path to control the size of the entire transmit / receive path for call testing. As such, it is not possible to apply a system for sharing a transmission / reception antenna, which is a current base station system implementation method, by the conventional technology.

The present invention was devised to solve the above problems, and in the configuration of a transmission / reception test path for configuring a base station test apparatus, a duplex type of transmission / reception is performed through the same antenna as a base station having a separate transmission and reception antenna. It is a first object and a second object to provide a base station test apparatus having a structure that can be commonly applied to a system, and a third object is to provide a method for configuring a function for each path of a base station test apparatus for a mobile communication system.

1 is a configuration diagram of a conventional mobile communication system base station test apparatus

2 is a block diagram of an apparatus for testing transmission and reception of a base station of a mobile communication system according to the present invention;

3 is a configuration diagram of a test apparatus for a DUPLEX base station of a mobile communication system according to the present invention

<Explanation of abbreviation>

TXDC FWD: TRANSMITTER (TX) DIRECTIONAL COUPLER (DC) FORWARD PORT

TXDC RFL: TRANSMITTER (TX) DIRECTIONAL COUPLER (DC) REFLECT PORT

TPDU: TRANSMITTER (TX) POWER DETECT UNIT

RSWU: RADIO FREQUENCY SWITCH UNIT

BCIU: BTS CONTROL & INTERFACE UNIT

BCP: BTS CONTROL PROCESSOR

TMSU: TEST MOBILE STATION UNIT

BPSU: BTU POWER SUPPLY UNIT

TBPF: TRANSMITTER BAND PASS FILTER

VSWR: VOLTAGE STANDING WAVE RATIO

BCIA-M: BTS CONTROL & INTERFACE BOARD ASSEMBLY-MINI

ATTU: ATTENUATOR UNIT

RFIU: RF INTERFACE UNIT

TPDB: TRANSMIT POWER DETECT BOARD

TM: TEST MOBILE

The present invention for achieving the first object, in the test apparatus of the base station separated from the transmission and reception in the mobile communication system,

TX-PATH comprising three antennas;

RX-PATH_A including three antennas;

RX-PATH_B including three antennas;

A first RFIU connected with the TX-PATH;

A second RFIU connected with the RX-PATH_A;

A third RFIU connected with the RX-PATH_B;

Three-way couplers connected in parallel with the first to third RFIUs, respectively;

The three-way coupler through a variable attenuator capable of controlling path loss by external control,

Switch control / variable attenuator controls and

SP3T switches connected in parallel with each of the first to third RFIUs;

Parallel connected PTMU; And

It features an MXBB that is powered by +27 volts and supplies +5 volts and -12 volts to the system.

The present invention for achieving the above second object, in the DUPLEX base station test apparatus of the mobile communication system,

With three antennas α -Sector;

With three antennas β -Sector;

With three antennas γ -Sector;

remind α A first RFIU associated with the sector;

remind β A second RFIU associated with the sector;

remind γ A third RFIU associated with the sector;

Three-way couplers connected in parallel with the first to third RFIUs, respectively;

The three-way coupler through a variable attenuator capable of controlling path loss by external control,

Switch control / variable attenuator controls and

SP3T switches connected in parallel with each of the first to third RFIUs;

Parallel connected PTMU; And

It features an MXBB that is powered by +27 volts and supplies +5 volts and -12 volts to the system.

The present invention for achieving the above third object,

In the functional configuration method of the base station test apparatus of the mobile communication system,

Applying one sector of the system output to each basic structure of the RFIU;

Sampling the output of the system at the D / C;

Switch connected to the antenna, second three-way coupler, two-way splitter and SP3T

Pass through the switch to TPDB (Transmit Power Detect Board),

Through the first three-way coupler and the variable attenuator in the two-way splitter

Delivering to a Test Mobile (TM); And

Adjusting the RF signal of the transmission and reception path to the appropriate size through the attenuator

Duplex that includes a system and uses both a transmitting and receiving antenna

A first process applied in the case of a system; And

Applying a transmit path and a receive path of the system to the RFIU;

Equally setting signal flows of the transmission and reception paths;

Setting a signal flow of the reception path in a direction opposite to the transmission path; And

This includes the steps of turning the switch on and off according to the configuration of the system.

Is applied to a system using a separate antenna.

With 2nd course

It is characteristic that it is made.

Hereinafter, the operation principle of the present invention will be described with reference to FIGS. 2 and 3.

Figure 2 shows the configuration of the transmission and reception separate base station test apparatus of the mobile communication system according to the present invention, Figure 3 shows the configuration of the duplex base station test apparatus of the mobile communication system according to the present invention.

In Figures 2 and 3 RFIU (RF INTERFACE UNIT) has one basic switch per antenna, a three-way coupler that combines three antennas to provide one input and output path, the two-way splitter has a basic structure, the present invention is this basic One SP3T switch, three-way coupler and attenuator are provided for route selection through the structure.

In the above-described drawing, a combiner combines, or combines, two signals having a radio frequency (RF). Thus, 3-Way Combiner combines signals of different frequencies on the input port side and outputs them to the port on the output side.

A splitter is also called a divider, and divides an input signal into two signals having the same size and divides them into two output ports.

The switch performs the function of path selection. It plays a role of connecting the flow of signal to a specific desired path by control from the outside among the signals flowing through the input port.

As an attenuator, a variable attenuator is used, and loss of a path can be controlled by external control. It is used in the signal flow, especially when you want to control the magnitude of the signal. In the present invention, a variable attenuator having an attenuation range of about 64 dB is used.

The base station test apparatus of the present invention has the same structure and has the advantage that it can be simultaneously applied to a base station that has a separate base station for transmission and reception and a base station that is commonly used for transmission and reception.

The base station test apparatus of the present invention used a combiner without using a duplexer to separate transmission and reception, and is used to simultaneously control transmission and reception signals by using a variable attenuation at the rear end of a switch to control signals of transmission and reception paths.

The present invention is also applicable to a system having a plurality of antennas through an extension of the basic structure.

The transmission path test of the present invention will now be described. The test of the base station transmission path is represented by the function of checking the transmission power for abnormality. The transmission signal of the base station is detected through the FWD (T_POWER) of the D / C, and applied to the TPDB through the switch, combiner, and distributor, and the TPDB detects the magnitude of this signal and checks for an abnormality in the transmission path. . In this process, it is possible to select and test a specific transmission path by controlling the switch.

Examine the receive path test. The test of the reception path is performed by generating a certain amount of signal from the TPDB and injecting the signal into the reception path of the base station to determine whether the expected signal is delivered.

Receive path test signal flow is the opposite of transmit path test, and TPDB, splitter, combiner, and switch are delivered in turn and flow into the receive path through T_POWER.

The difference from the base station transmission test detection device is that the direction and magnitude are different, and the transmission signal is divided into T_POWER and the reception signal by R_INJECTION. Here, the subscript of T_ means detection of the first, third and fifth transmission signals transmitted as an example of the configuration of the base station. The subscript in R_ identifies the A / B path of the reception path.

The transmission VSWR test will be described. Transmit VSWR measurement function is measured by comparing the magnitude of the transmitted signal and the reflected signal flowing through FWD and RFL of D / C. The signal flow has the same path as the transmission path test and is measured in TPDB.

For the measurement of the transmission signal and the reflection signal, each switch is selected by the control of the BCIU.

In this case, when the power is transferred along an arbitrary transmission line, the transfer degree of power varies according to the impedance of the final terminal, and the matching degree is defined as the ratio of the reflected wave.

Describe the reception VSWR test. The receive VSWR measurement function is injected into the same path as the receive path test, and is injected through the FWD / RFL port of the D / C. Each injected signal is measured by the system, and the signal injected into the RFL includes the reflected signal by the antenna, so that the reception VSWR can be measured by each difference.

Describe the call-related test. In the call-related test, the system transmits / receives a path to a test terminal (TMSU), transmits / receives an information signal, and tests the system by performing a call.

The signal flowed through the transmission and reception test path is commonly flowed into the test terminal through the faulty device, through which call-related tests can be performed.

Two switches are used for switching.

The first is a switch that connects one output path to two input paths, which selects the forward and reverse paths of the D / C.

The second is a switch that connects one output path to three input paths and selects a sector of the transmission path test.

Now look at the functional configuration of applying the present invention to a duplex system.

As shown in FIG. 3, one sector of the system output is applied to each basic structure of the RFIU. The signal flow of the transmission test of the system is sampled at the D / C, and transmitted to the TPDB (Transmit Power Detect B'd) through the switch and the three-way combiner, the two-way splitter, and the SP3T switch. Is carried out through the process of transmitting to the Test Mobile (TM) through the three-way coupler. The attenuator adjusts the RF signal of the transmit and receive paths to an appropriate size so that a smooth test is performed.

3) Function configuration in the system with separate transmission and reception

The transmit and receive paths of the system are applied to the basic structure of the RFIU (including three antenna paths). The signal flows of the transmission and reception paths are the same, and the signal flows of the reception paths are configured in opposite directions of the transmission paths. Depending on the configuration of the system, the appropriate switches are switched on and off.

According to the base station test apparatus of the present invention, it is commonly applicable to a system using a transmitting and receiving antenna in common and a system using a transmitting and receiving antenna separately.

Claims (8)

In the test apparatus of the base station separated from the transmission and reception in the mobile communication system, TX-PATH comprising three antennas; RX-PATH_A including three antennas; RX-PATH_B including three antennas; A first RFIU connected with the TX-PATH; A second RFIU connected with the RX-PATH_A; A third RFIU connected with the RX-PATH_B; First three-way couplers connected in parallel with the first to third RFIUs, respectively; The three-way coupler through a variable attenuator capable of controlling path loss by external control, Switch control / variable attenuator controls and SP3T switches connected in parallel with each of the first to third RFIUs; Parallel connected PTMU; And And an MXBB for supplying +5 volts and -12 volts to the system by receiving +27 volts of power. The method of claim 1, wherein the first RFIU, A path selection switch connected one-to-one with the antenna in the TX-PATH; A second three-way coupler connected in parallel with the switch to combine signals of different frequencies from the switches; And And a two-way splitter configured to receive a signal from the second three-way combiner and distribute the signal to the first three-way combiner and the SP3T switch. The method of claim 1, wherein the second and third RFIU are each, A two-way splitter for inputting a signal from the first three-way coupler and outputting the signal to the first three-way coupler; A third three-way combiner for receiving a signal from the two-way splitter and outputting the three path select switches respectively; And Mobile communication system base station test apparatus, characterized in that it is connected to the three antennas in the RX-PATH_A and RX_PATH_B one-to-one, and three path selection switch for transmitting a signal from the third three-way coupler to the antennas . The method of claim 1, wherein the PTMU is BCIA-M coupled with the switch control / variable attenuator control; BCP to exchange information with the BCIA-M; A TPDB that accepts a signal from the SP3T switch; And Mobile communication system base station tester, characterized in that consisting of the TM to exchange data with the variable attenuator. In the duplex base station test apparatus of a mobile communication system, With three antennas α -Sector; With three antennas β -Sector; With three antennas γ -Sector; remind α A first RFIU associated with the sector; remind β A second RFIU associated with the sector; remind γ A third RFIU associated with the sector; First three-way couplers connected in parallel with the first to third RFIUs, respectively; The three-way coupler through a variable attenuator capable of controlling path loss by external control, Switch control / variable attenuator controls and SP3T switches connected in parallel with each of the first to third RFIUs; Parallel connected PTMU; And And an MXBB for supplying +5 volts and -12 volts to the system by receiving +27 volts of power. The method according to claim 5, wherein the first to third RFIU, respectively remind α Sector, above β Sectors and said γ Three path selection switches connected one-to-one with an antenna in the sector to exchange data; A second three-way coupler connected in parallel with the three switches to exchange data; And And a two-way splitter for exchanging data with the first and second three-way combiners and the SP3T switch. The method of claim 5, wherein the PTMU is BCIA-M coupled with the switch control / variable attenuator control; BCP to exchange information with the BCIA-M; TPDB to exchange data with the first three-way combiner; And Mobile communication system base station tester, characterized in that consisting of the TM to exchange data with the variable attenuator. In the functional configuration method of the base station test apparatus of the mobile communication system, Applying one sector of the system output to each basic structure of the RFIU; Sampling the output of the system at the D / C; Switch connected to the antenna, second three-way coupler, two-way splitter and SP3T Pass through the switch to TPDB (Transmit Power Detect Board), Through the first three-way coupler and the variable attenuator in the two-way splitter Delivering to a Test Mobile (TM); And Adjusting the RF signal of the transmission and reception path to the appropriate size through the attenuator Duplex that includes a system and uses both a transmitting and receiving antenna A first process applied in the case of a system; And Applying a transmit path and a receive path of the system to the RFIU; Equally setting signal flows of the transmission and reception paths; Setting a signal flow of the reception path in a direction opposite to the transmission path; And This includes the steps of turning the switch on and off according to the configuration of the system. Is applied to a system using a separate antenna. With 2nd course Characterized in that the path configuration of the base station test apparatus of the mobile communication system.

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