KR20010111376A - Apparatus for terminal using local oscillation frequency in wireless local loop - Google Patents

Abstract

The present invention employs a plurality of wireless terminals for one wireless subscriber network terminal, and uses a local oscillation frequency so that wireless communication can be performed between separate terminals between each wireless terminal and the wireless subscriber network terminal. The present invention provides a terminal device that communicates using an oscillation frequency. The present invention includes: a base station for relaying a radio signal exchange between a counterpart station and a WLL terminal; WLL receives a radio signal of high frequency transmitted from the base station, converts it into a signal of local oscillation frequency band, transmits it to a wireless terminal, and converts the radio signal of local oscillation frequency band transmitted from a radio terminal into high frequency and transmits it to the base station. A terminal; Receives a radio signal of the local oscillation frequency band transmitted from the WLL terminal and demodulates into a voice signal and modulates a user's voice signal and comprises a plurality of radio terminals for transmitting a local oscillation frequency band radio signal to the WLL terminal, The simple structure of the device improves the utilization of parts and enables communication with a wireless terminal provided in a call group limited by a certain identification number, thereby enabling the wireless terminal to communicate with a wireless subscriber network. will be.

Description

Terminal device for communication using local oscillation frequency of wireless subscriber network {Apparatus for terminal using local oscillation frequency in wireless local loop}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal of a wireless local loop (WLL), and in particular, employs a plurality of wireless terminals for one wireless subscriber network terminal, and each wireless terminal and a wireless subscriber network terminal using a local oscillation frequency. It is an object of the present invention to provide a terminal device that communicates using a local oscillation frequency of a wireless subscriber network to enable wireless communication therebetween.

In general, in order to expand the use of a landline telephone or a wired or wireless telephone in a home or a business, there is a need to connect several terminals for one subscriber number. So, you can purchase multiple terminals to share one phone number or have a key phone system to share a few phone numbers with multiple users, especially for wireless subscriber networks. The own network terminal can be used to allow multiple users to share a single subscriber number.

That is, in the wireless subscriber network, the detachable terminal can receive a radio signal transmitted from a base station and relay the signal to a general telephone or a computer. When using the detachable terminal, the detachable terminal can directly receive and transmit the radio signal of the wireless subscriber network. Even if a terminal is not equipped with a function, it is possible to transmit and receive data transmitted through a wireless subscriber network.

Hereinafter, a separate wireless subscriber network terminal according to the prior art will be described.

First, Figure 1 is a block diagram of a wireless subscriber network system according to the prior art, Figure 2 is a block diagram of a separate wireless subscriber network terminal in FIG.

As shown in Figs. 1 and 2, the conventional wireless subscriber network system includes: a base station 11 for relaying radio signal exchanges between a counterpart station and the WLL terminal 12; A WLL terminal 12 which receives the radio signal transmitted from the base station 11 and relays it to the wired terminal 13, converts the wired signal generated by the wired terminal 13 into a radio signal, and transmits it to the base station; And a plurality of wired terminals 13 for demodulating the signal output from the WLL terminal 12 into a voice signal and modulating a voice signal induced by a user to wire the transmission to the WLL terminal 12.

The WLL terminal 12 includes: a radio transmitter / receiver 15 for receiving and demodulating a radio signal transmitted from the base station 11 and modulating and transmitting a signal to be transmitted to the base station 11 into a radio signal; Control unit 16 for specifying the wired terminal 13 to output the signal demodulated by the wireless transmitter and receiver 15 and modulates the signal received from the wired terminal 13 to control the wireless transmitter and receiver 15 to transmit the radio. )Wow; It is composed of a wired terminal interface 17 for interfacing a plurality of wired terminals 13 according to the control signal of the control unit 16 to enable signal exchange with the wired terminal 13.

The operation of the device configured as described above is as follows.

The detachable wireless subscriber network terminal 12 to which a plurality of wired terminals 13 can be connected serves as a wireless transceiver to relay data communication between the base station 11 and the wired terminal 13. That is, the high frequency signal transmitted from the base station 11 is received by the radio transmitter and receiver 15 to sequentially convert the intermediate frequency and the baseband frequency signal, and valid data from the baseband frequency signal using a digital modulation technique. Will be extracted.

The valid data extracted from the baseband frequency signal is transmitted to the wired terminal 13 by the control signal of the controller 12. In this case, the control unit 12 controls the wired terminal interface unit 17 to interface the valid data to the wired terminal 13. The valid data output from the wired terminal interface unit 17 by the above operation is input to a corresponding wired terminal among the plurality of wired terminals 13 and converted into a voice or text display of a form that a subscriber can recognize.

By the above operation, the wireless signal transmitted from the base station of the wireless subscriber network reaches a subscriber having a wired telephone or the like connected to the separate subscriber network terminal. When the subscriber receiving the wireless signal generates the data such as voice using the wired terminal 13, the WLL terminal 12 operates in the reverse of the receiving operation to generate the wired terminal 13. The transmitted data to the base station 11.

As a result, the detachable wireless subscriber network terminal performs a role as a wireless transmitter and a wireless receiver at the same time to enable the transmission and reception of data through the wireless subscriber network for a plurality of wired terminals.

However, in the case of the detachable wireless subscriber network terminal according to the related art described above, a separate wireless subscriber network terminal and a wired terminal are purchased, respectively, and the wired terminal is connected to the wireless subscriber network terminal in a wired manner. As a result, inconveniences occur in the operation of the wireless subscriber network terminal, and the wired terminal interface unit for communicating with the base station and the wired terminal wirelessly operates separately, so that the structure of the terminal is complicated and the efficiency of component operation is high. There was a disadvantage.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to adopt a plurality of wireless terminals for a single type of separate wireless subscriber network terminal, thereby increasing the local oscillation frequency of the wireless subscriber network terminal. The present invention provides a terminal device that communicates using a local oscillation frequency of a wireless subscriber network to enable wireless communication between each wireless terminal and a separate wireless subscriber network terminal.

In order to achieve the above object, a terminal apparatus for communicating using a local oscillation frequency of a wireless subscriber network according to the present invention includes: a base station for relaying a radio signal exchange between a counterpart station and a WLL terminal; WLL receives a radio signal of high frequency transmitted from the base station, converts it into a signal of local oscillation frequency band, transmits it to a wireless terminal, and converts the radio signal of local oscillation frequency band transmitted from a radio terminal into high frequency and transmits it to the base station. A terminal; It is composed of a plurality of wireless terminals for receiving a local oscillation frequency band radio signal transmitted from the WLL terminal to demodulate the voice signal and modulate the user's voice signal and transmits a local oscillation frequency band radio signal to the WLL terminal. It is characterized by technical configuration.

1 is a block diagram of a wireless subscriber network system according to the prior art,

FIG. 2 is a block diagram of a detachable wireless subscriber network terminal in FIG. 1;

3 is a block diagram of a wireless subscriber network system according to an embodiment of the present invention;

4 is a block diagram of a WLL terminal in FIG.

5 is a detailed block diagram of FIG.

Explanation of symbols on the main parts of the drawings

25, 27: wireless transmission and reception unit 26: control unit 27A: local oscillation filter unit

27B, 27C, 51, 56: Amplifier 50: Redundancy 52, 55: Filter

53, 54: mixer

Hereinafter, the configuration and operation of the present invention will be described in detail according to an embodiment according to the technical concept of the terminal device communicating using the local oscillation frequency of the wireless subscriber network as described above.

First, Figure 3 is a block diagram of a wireless subscriber network system according to an embodiment of the present invention, Figure 4 is a block diagram of a WLL terminal in Figure 3, Figure 5 is a detailed block diagram of FIG.

As shown in FIG. 3, a wireless subscriber network system according to an embodiment of the present invention includes: a base station 21 for relaying radio signal exchanges between a counterpart station and a WLL terminal 22; Receives a radio signal of a high frequency transmitted from the base station 21, and converts the frequency into a signal of the local oscillation frequency band and then transmits it to the radio terminal 23, the radio signal of the local oscillation frequency band transmitted from the radio terminal 23 A WLL terminal 22 for converting a high frequency signal to a base station; Receives a radio signal of the local oscillation frequency band transmitted from the WLL terminal 22, demodulates it into a voice signal, modulates a user's voice signal, and transmits a radio signal of a local oscillation frequency band to the WLL terminal 22. It consists of a wireless terminal 23.

As shown in FIG. 4, the WLL terminal 22 outputs a high frequency radio signal transmitted from the base station 21 to the second radio transmitter / receiver 27 according to a control signal of the controller 26. A first radio transmitter / receiver 25 for converting the frequency of the local oscillation frequency band output from the second radio transmitter / receiver 27 into a high frequency band and wirelessly transmitting the signal to the base station 21; Local part that the first radio transmitter and receiver 25 outputs the radio signal of the high frequency received from the base station 21 to the second radio transmitter and receiver 27 and is output by the second radio receiver 27. A control unit 26 for controlling the radio signals in the oscillation frequency band to be outputted to the first radio transceiver 25; In accordance with the control signal of the control unit 26, the high frequency radio signal output from the first radio transmitter / receiver 25 is converted into a radio signal of a local oscillation frequency band and transmitted, and transmitted from the radio terminal 23. And a second radio transmitter / receiver 27 for receiving a radio signal in a local oscillation frequency band and outputting the radio signal to the first radio transmitter / receiver 25.

In addition, as shown in FIG. 5, the second radio transceiver 27 extracts only a local oscillation frequency signal from a radio signal received through an antenna, outputs the signal to the third amplifier 27B, and a fourth amplification. A local oscillation filter section 27A for passing only signals in the local oscillation frequency band among the signals output from the section 27C; A third amplifier 27B for amplifying the signal output from the local oscillation filter section 27A and outputting the amplified signal to the first radio transceiver 25; And a fourth amplifier 27C which amplifies the high frequency signal input from the first radio transceiver 25 and outputs the amplified high frequency signal to the local oscillation filter 27A.

The operation of the device configured as described above is as follows.

In the wireless subscriber network system according to the present invention, the WLL terminal 22 can communicate with the wireless terminal 23 by using a local oscillation frequency, thereby extending the function of the control unit in the WLL terminal 22 to provide the wireless terminal ( 23) to be provided in plurality. In this case, the plurality of wireless terminals 23 provided use a general wireless transmitting / receiving terminal having a wireless transmitting / receiving unit for transmitting and receiving wireless signals.

As described above, the wireless subscriber network system according to the present invention is the same as the conventional technology except that the WLL terminal 22 can communicate with the plurality of wireless terminals 23. That is, the high frequency radio signal transmitted from the base station 21 is received at the WLL terminal 22 and the high frequency signal is received at the base station 21 among the signals transmitted from the WLL terminal 22. In the signal transmitted from the WLL terminal 22, a signal of the local oscillation frequency band is received by the radio terminal 23, and a signal of the local oscillation frequency band transmitted by the radio terminal 23 is received by the WLL terminal 22. Done.

Therefore, when the WLL terminal 22 is operated only for the communication with the base station 21, the communication operation with the wireless terminal 23 is not performed, and the wireless communication between the WLL terminal 22 and the wireless terminal 23 is performed. In this case, the WLL terminal 22 may modulate the signal of the high frequency band received by the base station 21 into a signal of the local oscillation frequency band and transmit the signal to the wireless terminal 23. That is, the WLL terminal 22 may perform a relay function of the radio signal such as the base station 21 with respect to the radio terminal 23.

The present invention transmits a radio signal of a local oscillation frequency band having a frequency band different from that of the base station 21 to a radio signal transmitted from one WLL terminal 22. In order to process signals in different frequency bands as described above, the WLL terminal 22 includes a first radio transceiver 25 and a second radio transceiver 27, and each radio transceiver 25, 27, respectively. It includes a control unit 26 for controlling the operation of. The control unit 26 controls signal exchange between the first wireless transmission and reception unit 25 and the second wireless transmission and reception unit 27 to perform a signal relay operation between the base station 21 and the wireless terminal 23.

In the radio signal processing operation, the antenna of the WLL terminal 22 is transmitted from the base station.

The high frequency radio signal and the local oscillation frequency signal transmitted from the radio terminal 23 are respectively received. The received radio signal is input to the first radio transceiver 25 and the second radio transceiver 27, respectively.

Then, the first radio transmitter / receiver 25 separates the received radio signal through the redundancy unit 50 and then amplifies the signal in the first amplifier 51 to extract a high frequency band signal from the first filter unit 52. After the input to the first mixer 53. The first mixer 53 receives the local oscillation frequency signal generated by the local oscillator 57, mixes the signal with the high frequency band output from the first filter unit 52, and supplies the high frequency signal to the controller 52. Outputs RX SIGNAL to notify receipt.

Therefore, when the wireless signal received from the base station 21 is to be transmitted to the wireless terminal 23, the control unit 26 receiving the RX SIGNAL generates a TX SIGNAL signal and outputs it to the second mixer 54. . The second mixer 54 receiving the TX SIGNAL receives the local oscillation frequency from the local oscillator 57 and mixes and outputs the high frequency signal received by the first mixer 53. The signal output from the third mixer 54 is amplified by the fourth amplifier 27C of the second wireless transmitter / receiver 27 and only the signal of the local oscillation frequency band is extracted from the local oscillation filter 27A. Radio is transmitted through the antenna. The radio signal is a signal of a frequency band that the radio terminal can receive.

In the above operation, the wireless signal transmitted from the base station 21 of the wireless subscriber network is relayed to the wireless terminal 23, and the operation of relaying the wireless signal transmitted from the wireless terminal 23 to the base station 21 is performed by the above operation. It will take a different path. That is, the second radio transmitter / receiver 27 receives the signal received through the antenna, extracts only the signal of the local oscillation frequency band from the local oscillation filter unit 27A, and then amplifies the signal from the third amplification unit 27B. The first mixer 53 of the transceiver 25 is output. The local oscillation frequency signal input to the first mixer 53 is output to the third mixer 54 according to the control signal of the controller 26 and then the frequency signal of the high frequency band is received by the second filter 55. It is extracted and amplified by the second amplifier 56 and transmitted to the base station 21 via the redundant unit 50.

At this time, in order to exclude the possibility of interference between another WLL terminal and the wireless terminal 23 communicating with the base station 21 to which the WLL terminal 22 to which the present invention is applied, unique identification of the wireless subscriber network terminal and the antenna. You can also use numbers. Since the antenna has a main function of communicating with the base station 21, it does not generate a large output for signals of the local oscillation frequency band, thereby limiting the effective communication distance between the WLL terminal and the radio terminal period. In addition, the identification number of the WLL terminal 22 is applied during local oscillation frequency conversion in the corresponding WLL terminal 22 to perform a function of preventing interference between other WLL terminals subscribed to the same base station 21 and the wireless terminal 23. have.

As described above, the wireless subscriber network system according to the present invention does not use a plurality of wireless subscriber network terminals and multiple wired terminals when one subscriber number is connected to multiple terminals, and is used locally. Using the oscillation frequency, a new concept wireless subscriber network system including a wireless terminal having a simple structure capable of communicating with a wireless subscriber network terminal is constructed.

That is, by removing the wired transmission / reception portion of the conventional wireless subscriber network terminal, extending the functions of some of the wireless transmission / reception portions, and adding a part of the functional portion to configure a separate wireless subscriber network terminal, the separate wireless subscriber network terminal is locally oscillated. The wireless terminal may receive a radio signal carried on a frequency and may receive a radio signal of a local oscillation frequency band transmitted by the wireless terminal in a separate type of wireless subscriber network terminal.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the technical spirit of the present invention by various embodiments, changes and modifications and equivalents can be used.

As described above, the terminal device for communicating using the local oscillation frequency of the wireless subscriber network according to the present invention, unlike the prior art, there is no separate functional unit for wired interface to the wired terminal, the device, Simple structure improves the utilization of parts and increases the convenience of the operator in maintenance work of the WLL terminal.

The wireless subscriber network terminal according to the present invention can not only perform a function as a terminal for communication with a base station as in the related art, but also can communicate with a wireless terminal provided in a talk group limited by a certain identification number. By doing so, even a simple device configuration can perform a function of relaying communication with the wireless subscriber network with respect to the wireless terminal, thereby making it possible to construct a wireless subscriber network system having high efficiency and low cost.

Claims (3)

A base station 21 for relaying radio signal exchanges between the other station and the WLL terminal 22; Receives a radio signal of a high frequency transmitted from the base station 21, and converts the frequency into a signal of the local oscillation frequency band and then transmits it to the radio terminal 23, the radio signal of the local oscillation frequency band transmitted from the radio terminal 23 A WLL terminal 22 for converting a high frequency signal to a base station; Receives a radio signal of the local oscillation frequency band transmitted from the WLL terminal 22, demodulates it into a voice signal, modulates a user's voice signal, and transmits a radio signal of a local oscillation frequency band to the WLL terminal 22. A terminal device for communicating using a local oscillation frequency of a wireless subscriber network, characterized in that it comprises a wireless terminal (23). The WLL terminal 22 according to claim 1, Local radio frequency band output from the second radio transmitter / receiver 27 is outputted to the second radio transmitter / receiver 27 according to a control signal of the controller 26. A first radio transmitter / receiver 25 for converting a signal of the radio frequency into a high frequency band and wirelessly transmitting the signal to the base station 21; Local part that the first radio transmitter and receiver 25 outputs the radio signal of the high frequency received from the base station 21 to the second radio transmitter and receiver 27 and is output by the second radio receiver 27. A control unit 26 for controlling the radio signals in the oscillation frequency band to be outputted to the first radio transceiver 25; In accordance with the control signal of the control unit 26, the high frequency radio signal output from the first radio transmitter / receiver 25 is converted into a radio signal of a local oscillation frequency band and transmitted, and transmitted from the radio terminal 23. Terminal device for communicating using a local oscillation frequency of a wireless subscriber network, characterized in that it comprises a second radio transmission and reception unit 27 for receiving a radio signal of the local oscillation frequency band and outputs it to the first radio transceiver unit 25. . The method of claim 2, wherein the second radio transceiver 27, Local to extract only the signal of the local oscillation frequency band from the radio signal received through the antenna to the third amplifier 27B, and to pass only the signal of the local oscillation frequency band from the signal output from the fourth amplifier 27C An oscillation filter portion 27A; A third amplifier 27B for amplifying the signal output from the local oscillation filter section 27A and outputting the amplified signal to the first radio transceiver 25; The local oscillation frequency of the wireless subscriber network is characterized by consisting of a fourth amplification unit (27C) for amplifying the high frequency signal input from the first radio transmission and reception unit 25 and outputs it to the local oscillation filter unit (27A). Terminal device to communicate using.