KR20030056130A - Appratus for Selectively Providing the Transmitter Redundancy by using Transmitter Diversity Function - Google Patents

Abstract

PURPOSE: A selective transmission doubling apparatus using transmission diversity function is provided to achieve the doubling of a transmitter and perform transmission diversity function automatically. CONSTITUTION: According to the selective transmission doubling apparatus using transmission diversity function, a transmitter unit(400) includes the transmission diversity function. A radio control unit(RFCU)(420) achieves the doubling of the transmitter unit when transmission doubling function is required in the transmitter unit, and observes the state of a frequency up converter and a power combiner(431) in the transmitter unit and then controls a RF channel control unit(RCCU)(430) according to the above state information, in order to perform the transmission diversity function. And the RF channel control unit branches switches(SW1-SW7) to transfer signals through independent apparatus when the transmission doubling function is required, and controls the transmitter unit by branching the switches according to the control of the radio control unit so that two independent paths are set when the transmission diversity function is required.

Description

{Appratus for Selectively Providing the Transmitter Redundancy by using Transmitter Diversity Function}

The present invention relates to a selective transmission redundancy apparatus using a transmission diversity function.

The communication system introduces a system redundancy for the purpose of providing a stable and reliable service to the user. In the case of the base station reception system of the mobile communication system, a reception diversity function is included to improve the performance of the reception system. have. In a receiving system of a base station including a reception diversity function, when one receiver fails, the failed receiver does not provide the reception diversity function, but the other receiver is operating normally. It can be seen that it provides receive redundancy.

In the case of a transmission system of a base station, if a signal cannot be radiated due to a failure of the transmitter, the entire system may be interrupted in service, resulting in a fatal result. Therefore, in recent years, a technique has been developed to replace the reception diversity function by including a transmission diversity function that can be used as a function such as the reception diversity function in the transmission system.

However, since the transmission diversity function is not always required in the transmission system of the mobile communication base station, when the transmission diversity function is not required, expensive frequency uplinkers and power amplifiers are not used. Inefficient

1 is a block diagram of a transmission and reception apparatus in a conventional mobile communication system.

As shown in FIG. 1, a transmission / reception apparatus before a transmission / reception diversity function is reported includes a transceiver 100 and front-ends 110 and 111, and signals through one path. Is configured to transmit and receive. Therefore, if a component in the transmitting / receiving device fails, there is no redundant path for signals to be transmitted and received, resulting in the service of the entire system being interrupted.

On the other hand, if a terminal having a reception diversity function is implemented, it is obvious that the receiver performance of the terminal will be improved. However, since a small size and a low cost terminal are required, it is difficult to add a reception diversity function to the receiver of the terminal. There are problems in terms of technology and price.

Therefore, in recent years, a base station transmit diversity technique has been proposed to replace a terminal having a mobile terminal receive diversity function by providing a transmit diversity function to a base station transmitter for the purpose of adding a receive diversity function to the terminal. .

FIG. 2 is a configuration diagram of a conventional transmission / reception apparatus providing a transmit diversity function, and FIG. 3 is a configuration diagram of a conventional transmission / reception apparatus when not using the provided transmission diversity function.

2 and 3, the transceiver 200 provided with the transmit diversity function includes two frequency uplinkers 201 and 203, two frequency downlinkers 203 and 204, and two front ends 210, 211).

In transmission diversity technology, a mobile communication base station provides two independent transmission signals to a terminal so that the terminal has a reception diversity function with only one receiver. However, the transmit diversity function of the mobile base station is an optional function matter that is not always required. That is, when the transmit diversity function is not required, the transceiver is configured as shown in FIG. 3.

As shown in FIG. 3, when no transmit diversity function is provided, one of the two frequency uplinkers 201 and 202 and one of the two front ends 310 and 311 may be used. Since the power amplifier inside the front end 310 is not used, it is inefficient in terms of the system, and the configuration of the transmitter as shown in FIG. There is a problem in that the function of the transceiver cannot be automatically changed so that the transmit diversity function is used immediately.

The present invention has been proposed to solve the above problems, and implements duplexing of a transmitter when a transmission redundancy function is required in a transmission system, and automatically performs a transmission diversity function when a transmission diversity function is required. It is an object of the present invention to provide an optional transmission redundancy apparatus for enabling such an operation.

1 is a block diagram of a transmission and reception apparatus in a conventional mobile communication system.

2 is a block diagram of a conventional transmitting and receiving device for providing a transmit diversity function.

3 is a block diagram of a conventional transmission / reception apparatus when not using the provided transmit diversity function.

4 is a block diagram of an embodiment of a selective transmission redundancy apparatus according to the present invention when no transmission diversity function is used.

5 is a diagram illustrating an operation of a selective transmission redundancy apparatus according to the present invention when the frequency uplinker is out of order.

6 is a diagram illustrating an operation of a selective transmission redundancy apparatus according to the present invention when a power amplifier inside a front-end has failed.

FIG. 7 is an embodiment diagram for explaining an operation when a transmit diversity function is used. FIG.

* Explanation of symbols for the main parts of the drawings

100, 200: transceiver

110, 210, 310, 410: front-end a-1

111, 211, 311, 411: shear a-2

101, 201, 401: frequency uplinker a-1

202, 402: frequency upr a-2

102, 203, 403: frequency downlinker a-1

103, 204, 404: frequency downlinker a-2

420: RF Control Unit (RFCU)

430: RF Channel Control Unit (RCCU)

SW1 ~ SW7: switch

431: Combiner

In order to achieve the above object, the present invention provides a selective transmission redundancy apparatus using a transmission diversity function, comprising: transmission means including a transmission diversity function; In order to implement duplication of the transmission means when the transmission redundancy function is required in the transmission means, and to automatically perform the transmission diversity function when the transmission diversity function is required, A radio control unit (RFCU: Radio Control Unit) for monitoring the state of the power amplifier and controlling the radio channel control unit according to the state information; And switching the switches so that signals are transmitted through the selected device when the transmission redundancy function is required, and when the transmission diversity function is required, the switches are controlled according to the control of the radio control means so that two transmission paths independent of each other are established. And switching the radio channel control unit (RCCU: RF channel control unit) for controlling the transmission means.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a configuration diagram of an exemplary transmission redundancy apparatus according to the present invention when the transmit diversity function is not used. In the present invention, a radio channel for duplexing a frequency booster and a power amplifier inside a front-end is shown. The control unit includes a controller and a radio control unit.

As shown in FIG. 4, the selective transmission redundancy apparatus according to the present invention includes a transmitter 400 including a transmit diversity function, an RF channel control unit (RCCU) 430, and a radio control unit ( RFCU (420) and front-end (410, 411) and the like, the radio channel control unit (RCCU) 430 is 2: 1 switches (SW1 ~ SW7) and power combiner ( 431).

The radio control unit (RFCU) 420 displays the state of the frequency uplinkers 401 and 402 in the transmitter 400, the state of the frequency downlinkers 403 and 404, and the state of the power amplifiers inside the front ends 410 and 411. By monitoring, the switch switching operation in the radio channel control unit (RCCU) 430 is controlled according to the state information of the system components.

When the transmission redundancy function is required, the radio channel control unit (RCCU) 430 controls the internal switch switching operation according to the control of the radio control unit (RCCU) 430, thereby increasing the frequency booster inside the transmitter 400. Redundancy of 401 and 402 and redundancy of power amplifiers within front ends 410 and 411 can be implemented, and when the transmit diversity function is required, the transmitter 400 and the front end 410 can be performed. 411).

The front ends 410 and 411 are configured such that the transmission signal passes through the power amplifier and the transmission bandpass filter in the transmission path, and the reception signal passes through the reception bandpass filter and the low noise amplifier in the reception path. .

FIG. 5 is a diagram illustrating an operation of the selective transmission redundancy apparatus according to the present invention when the frequency uplinker fails. FIG. 5 is a diagram illustrating the duplexing operation of the transmitter when one of the two frequency uplinkers fails. Giving.

As shown in FIG. 5, when the frequency uplinker fails, the transmission duplication operation of the selective transmission duplication apparatus according to the present invention will be described. When the radio control unit (RFCU) 420 detects a failure (or malfunction) of the frequency uplinker a-2 (402), it configures the configuration of the switch 2 (SW2) inside the radio channel control unit (RCCU) 430. Change to the path. Therefore, since the signal is applied to the frequency uplifter a-1 401, even if the frequency uplifter a-2 402 fails, the transmitter 400 can transmit the signal without interruption.

FIG. 6 is a diagram illustrating an operation of a selective transmission redundancy apparatus according to the present invention when a power amplifier inside a front-end has a failure. FIG. Shows the redundancy behavior of.

As shown in FIG. 6, when the power amplifier is malfunctioning (or malfunctioning), the transmission redundancy operation of the selective transmission redundancy apparatus according to the present invention will be described below. When the wireless control unit (RFCU) 420 detects a failure (or malfunction) of the power amplifier inside the front a-2 (411), the wireless control unit (RFCU) 420 receives the wireless channel control unit (RCCU) ( 430) The configuration of the switch 7 (SW7) inside the switch to the ab path. Therefore, the signal transmission service is not interrupted because the transmission signal is applied to the front end a-1 410.

7 is a diagram for describing an operation when a transmission diversity function is used.

As shown in FIG. 7, when the transmitter 400 performs a transmit diversity operation, the input signal passes through the ac path of the switch 1 (SW1), and then the frequency uplinker a-1 401 is used as an RF frequency. Frequency conversion is applied to the front end a-1 410 via the cb path of the switch 3 (SW3) and the bc path of the switch 6 (SW6). The signal applied to the front end a-1 410 is amplified by the power amplifier inside the front end a-1 410, passes through the bandpass filter, and is then radiated into the free space through the antenna.

In addition, after the remaining input signal passes through the cb path of the switch 2 (SW2), the frequency up-converter a-2 (402) is a frequency conversion to the RF frequency, passes through the cb path of the switch 4 (SW4), switch 5 ( It is applied to the front end a-2 (411) via the bc path of SW5) and the ac path of switch 7 (SW7). The signal applied to the front end a-2 411 is amplified by the power amplifier inside the front end a-2 411, passes through the bandpass filter, and is then radiated into the free space through the antenna.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, the present invention provides a stable (high-reliability) transmission service by duplexing the frequency booster in the transmitter and the power amplifier in the front end when the transmission diversity function is not used in the mobile communication system. When this is required, the transmission diversity function can be automatically performed, thereby increasing the efficiency of the transmission system.

Claims (2)

In the selective transmission redundancy apparatus using the transmission diversity function, Transmission means including a transmission diversity function; In order to implement duplication of the transmission means when the transmission redundancy function is required in the transmission means, and to automatically perform the transmission diversity function when the transmission diversity function is required, A radio control unit (RFCU: Radio Control Unit) for monitoring the state of the power amplifier and controlling the radio channel control unit according to the state information; And The switches are switched so that signals are transmitted through the selected device when the transmission redundancy function is required, and the switches are switched under the control of the radio control means so that two transmission paths independent of each other are established when the transmission diversity function is required. RF channel control unit (RCCU) for controlling the transmission means Optional transmission redundancy apparatus using a transmit diversity function comprising a. The method of claim 1, The radio channel control means, Selective transmission redundancy apparatus using a transmit diversity function, characterized in that it comprises a plurality of switches and a power synthesizer.