KR100308906B1 - Radio frequency receiving unit and managing method thereof in pico bts system of mobile communication system - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

The present invention relates to a base station apparatus and a method of operating the mobile communication system.

I. The technical problem to be solved by the invention

The present invention provides an apparatus and method for reducing the number of antennas in a pico BTS of a mobile communication system.

All. Summary of Solution of the Invention

The present invention provides a radio unit of a sub-unit base station system having at least two cells in a mobile communication system, each cell having a corresponding radio unit, and each radio unit includes:

An antenna that transmits and receives a radio signal of a predetermined cell, and converts and amplifies a transmission signal into a signal of a band to be transmitted, and converts only a predetermined band signal among the received signals into an intermediate band signal and outputs the converted signal. A receiver unit for receiving a signal from a transceiver unit of another cell, generating and outputting a diplex signal, and checking the form of the sub-unit base station, and receiving an input terminal of the receiver unit from another antenna of the cell or a transceiver unit of another cell. And a control unit for controlling the connection and controlling the transmitted signal.

la. Important uses of the invention

Used in subunit base stations in mobile communication systems.

Description

Radio receiver unit and its operation method in subunit base station system of mobile communication system {RADIO FREQUENCY RECEIVING UNIT AND MANAGING METHOD THEREOF IN PICO BTS SYSTEM OF MOBILE COMMUNICATION SYSTEM}

The present invention relates to a method of operating a pico base station system of a mobile communication system, and more particularly, to a method of operating a reception antenna in a subunit base station.

In general, a mobile communication system includes base stations communicating with a mobile communication terminal using a predetermined frequency band, base system controllers (BSCs) and mobile communication switching systems (MSCs) that control a plurality of base stations. It is composed. In addition, recently, base stations are divided into general base stations and small unit base stations (Pico BTS) having smaller capacities than the general base stations, and the number of small unit base stations is increasing. The antenna of such a base station basically requires two reception paths corresponding to one cell in order to have diversity in terms of reception. As such, two receiving antennas are required to correspond to one cell in order to have two receiving paths.

A process in which a signal received from such an antenna is processed in a pico BTS will be described with reference to FIG. 1. 1 is a block diagram of an antenna provided in one cell and a module for processing a signal according to the related art.

One base station is typically composed of three cells. Thus, one base station is composed of three cells, and each cell has a module having the configuration as shown in FIG. 1. Next, the configuration and operation of FIG. 1 will be described.

The first antenna ANT1 is connected to the duplexer 10 to transmit and receive a radio signal to the air. The duplexer 10 distinguishes a signal to be transmitted from a path of the received signal and transmits a signal to be transmitted to the first antenna ANT or transmits a signal received through the first antenna ANT to the first receiver 22. Enter it. The first receiver 22 converts the received signal into a signal of intermediate frequency and transmits the received signal to a block for processing a reception path. In addition, the signal to be transmitted is output through a process of converting a signal of an intermediate frequency to be transmitted into a signal of a band to be transmitted by the transmitter 21. The signal output from the transmitter 21 is amplified by the amplifier 12 and connected to the transmitting end of the duplexer 10. In this way, transmission and reception are performed through the first antenna ANT1 for transmission and reception of a signal. A second antenna ANT2, which is a different antenna for each cell, is provided to increase the diversity of the received signal. The second antenna ANT2 receives a radio signal and inputs it to the second receiver 23 through another duplexer 11. Then, the second receiver 23 is used to increase the diversity by converting the received signal into a signal of an intermediate frequency and inputting it to the receiving module. The transmitter 21, the first receiver 22, and the second receiver 23 become a wireless processing unit (XCVU) 20.

As described above, two different antennas are required to increase diversity in a base station corresponding to one cell. Therefore, in the case of a base station consisting of three cells, all six antennas are required, and there is a difficulty in installing the base station due to the increase in the number of hits, and at the same time, the cost consumed for each base station increases, so the telecommunications company It will cost more. This also results in an increase in the consumer's telecommunications fees.

Accordingly, an object of the present invention is to provide a method for reducing the number of antennas while maintaining diversity in one base station.

The present invention for achieving the above object is a radio unit of a subunit base station system having at least two cells in a mobile communication system, each cell having a corresponding radio unit for each cell, the configuration of each radio unit:

An antenna that transmits and receives a radio signal of a predetermined cell, and converts and amplifies a transmission signal into a signal of a band to be transmitted, and converts only a predetermined band signal among the received signals into an intermediate band signal and outputs the converted signal. A receiver unit for receiving a signal from a transceiver unit of another cell, generating and outputting a diplex signal, and checking the form of the sub-unit base station, and receiving an input terminal of the receiver unit from another antenna of the cell or a transceiver unit of another cell. And a control unit for controlling the connection and controlling the transmitted signal.

1 is a block diagram of an antenna provided in one cell and a module for processing a signal according to the prior art;

2 is a block diagram of an antenna of a base station corresponding to two cells and a radio module according to an embodiment of the present invention;

3 is a control flowchart for a reception path switch of a base station during initial operation in a base station when the number of antennas is reduced according to the present invention;

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of an antenna of a base station corresponding to two cells and a radio module according to an exemplary embodiment of the present invention. Hereinafter, the configuration and operation according to the present invention will be described in detail with reference to FIG. 2.

The first wireless unit (PRU1) 100 is a wireless module corresponding to one cell, and the second wireless unit (PRU2) 110 is a wireless module corresponding to the other cell. First, the configuration and operation of the first wireless unit 100 will be described. The first antenna ANT1 is connected to the first duplexer 101 and performs an operation of transmitting and receiving a radio signal by distinguishing a signal to be transmitted from a received signal. The first duplexer 101 inputs the received signal to the first receiver 103, and the input signal is down-converted to an intermediate frequency under the control of the first controller 108 and input to the second duplexer 104. do. Then, the second duplexer 104 separates the signal of the intermediate frequency received from the first receiver 103 and outputs it to a module for processing the same. When the second duplexer 104 receives a signal to be transmitted, the second duplexer 104 inputs the signal to the I input terminal of the transmitter 102. In addition, the Q signal of the signal to be transmitted is connected to the Q input terminal of the transmitter 102 through the third duplexer 107. Therefore, the transmitter 102 divides a signal to be transmitted under the control of the controller 108, converts the signal into a signal of a transmission band, amplifies it, and outputs the amplified signal to the first duplexer 101. The first duplexer 101 receives a signal to be transmitted through a transmitter and transmits the signal through a first antenna ANT1.

In addition, it is described that no other antenna ANT0 provided for each cell is provided. Then, when the antenna is connected, the reception filter 105 required to separate only a signal of a predetermined band required by the antenna, and the second receiver 106 for converting the output of the reception filter 105 into a signal of an intermediate frequency band, A third duplexer 107 is further provided for outputting the output of the second receiver 106 to the receiving module. In addition, the first control unit 108 controls the operation of the first wireless unit according to the current connection state of the base station, the characteristics of the base station and the number of antennas.

Next, the configuration and operation of the second wireless unit 110 will be described. The second wireless unit 110 includes a fourth duplexer 111 and a transmitter 112 connected to the second antenna ANT2, a fifth duplexer 114 for transmitting and receiving a signal in an intermediate frequency band of the I signal, and the fifth duplexer 114 and the second antenna ANT2. Intermediate with the third receiver 113, the receiving filter 115 connected to the third antenna ANT3, and the fourth receiver 116 receiving the data from the receiving filter, receiving data from the fourth duplexer and outputting the data to the fifth duplexer. And a sixth duplexer 117 for transmitting and receiving a Q signal of a frequency band and a second controller 118 for controlling the operation of the second wireless unit. In addition, each operation of the above portion is all the same as the first wireless unit, but only the operation of the third receiver 113 is configured to perform the operation according to the present invention.

Next, the connection relationship and operation of the third receiver 113 will be described in more detail. The third receiver 113 receives the output of the fourth duplexer 111 as an input and is output to the second receiver 106, and simultaneously converts the signal into an intermediate frequency signal. The signal converted into the intermediate frequency is output to the fifth duplexer 114. As described above, the output to the second receiver 106 is when the antenna ANT0 is not connected to the reception filter 105 of the first wireless unit 107. In this case, the second receiver 106 receiving the output signal on the intermediate path of the third receiver 113 receives the signal as an input, converts the signal into an intermediate frequency signal, and outputs the signal to the third duplexer 107. By outputting in this manner, the second receiver 106 may have the same effect as the signal received by the reception filter 105. In addition, the antenna ANT0 is connected to the reception filter 105 of the first wireless unit 100. In addition, the control process for performing such an operation is determined by each control unit located in each wireless unit.

3 is a control flowchart for a receiving path switch of a base station during initial operation in a base station when the number of antennas is reduced according to the present invention. Hereinafter, the control flowchart of FIG. 3 will be described in detail with reference to the configuration of FIG. 2.

First, when installing a base station, the installer of the base station needs to connect two antennas to each radio unit (PRU) if the base station is to operate the corresponding base station in 1FA Omni or sector shape in hardware. But in other cases, if you want to operate in the shape of 2FA Omni or 3FA Omni, for example, connect one antenna of each radio part. The information is stored in the main control unit of the control base station BSC or the base station BTS. When the connection is made and power is turned on, the wireless unit of the base station performs the same process as the control flowchart of FIG. 3. The operation of this process will be described assuming that the first control unit 108 of the first wireless unit 100 is performed as an example.

The first controller 108 requests data according to the configuration of the base station to the base station central processing unit in step 200. When the first controller 108 receives the data according to the configuration from the central processing unit of the base station in step 202, the first controller 108 proceeds to step 204 to analyze the received data. At this time, the analysis becomes shape information of the base station. The first controller 108 proceeds to step 206 to check whether the shape information of the current base station corresponds to the shape of the 1FA Omni. In case of the data according to the shape of 1FA Omni as described above, the process proceeds to step 212, and if not, the process proceeds to step 208. In step 208, the first controller 111 checks whether the base station has a sector shape. If the result of the check in step 208 is a sector shape, the process proceeds to step 212, otherwise, the process proceeds to step 210. When the first control unit 108 proceeds to step 212, the first control unit 108 connects the data reception path of the reception path second receiver 106 with the reception filter 105. That is, in the case of 1FA Omni or a sector shape, as described above, two antennas are required for each sector, and thus an antenna ANT0 is connected to the reception filter 105. In addition, it is not necessary to receive the signal of the receiver from another radio unit.

On the contrary, when the process proceeds from step 208 to step 210, the first control unit 108 controls to receive a signal from a receiver included in the wireless unit of the other side since the antenna is not connected to its reception filter. do. That is, when the antenna ANT0 is not connected to the reception filter 105 in the configuration of FIG. 2, a signal is received from the third receiver 113 of the second wireless unit 110 and used to use the signal. to be. In this case, the operation is performed when the sector shape or the 1FA Omni is not in the shape as described above. Therefore, in the case of 2FA Omni or 3FA Omni, the connection is made through the above process.

Therefore, the reception path of the wireless unit is divided into two, one path is a path connected through the duplexer, and the other path is a path through the reception filter. However, since the radio wave received from the receiver side of the sector other than the path of the reception filter can be used, the number of receiving antennas can be reduced in the small base station of the mobile communication system.

As described above, since the number of receiving antennas can be reduced in the small base station of the mobile communication system, there is an advantage in that the price competitiveness can be increased.

Claims (4)

In the wireless unit of the sub-unit base station system having at least two cells in the mobile communication system, Each cell has a corresponding radio section, and each radio section consists of: An antenna for transmitting and receiving radio signals of a predetermined cell, A transmission and reception unit for converting and amplifying a transmission signal into a signal of a band to be transmitted through the antenna, and transmitting and converting only a predetermined band signal among the received signals into a signal of an intermediate band; A receiver unit for receiving a signal from a transceiver of another cell and generating and outputting a diplex signal; A sub-unit base station of a mobile communication system characterized in that it comprises a control unit for controlling the connection of the input unit of the receiver unit with the other antenna of the cell or the transceiver unit of another cell by checking the form of the sub-unit base station, and controls the transmitted signal Wireless receiver device in the system. The method of claim 1, wherein the wireless receiver, A first duplexer connected to the antenna and separating and outputting a transmission signal and a reception signal; A first receiver for receiving the output of the first duplexer and converting the signal into a signal of an intermediate frequency band; A second duplexer which receives the output of the first receiver and the signal of the intermediate frequency to be transmitted, outputs the output of the first receiver to the receiver circuit, and outputs the signal of the intermediate frequency to be transmitted to the transmitter; And a transmitter for converting the output of the second duplexer into a signal of a band to be transmitted and amplifying the converted signal and outputting the converted signal to the first duplexer. . The method of claim 1 or 2, wherein the receiver unit, A reception filter which can be connected to another antenna corresponding to the corresponding area and filters only signals of a predetermined band; A second receiver for selectively receiving a signal from an output of the reception filter or a transceiver of another cell and converting the signal into an intermediate frequency; And a third duplexer for inputting the output of the second receiver into a circuit for use for diplexing. In the operation method of the wireless receiver in the sub-unit base station of the mobile communication system, During the initial operation, reading the configuration data of the base station and examining the shape information; And when the shape information is omni and consists of at least two cells, a process of connecting a transceiver of the other side to a diplex receiver of a cell having only one antenna among the sectors. A wireless receiver unit in a subunit base station system of a communication system.