KR19990015294A - Simple home base station - Google Patents

Abstract

The present invention relates to a simple home base station (SHBS) that can be implemented very cheaply by using an existing telephone as it is.

Such a simple home base station includes a general telephone connection portion 31; A button 32 for registering and releasing the city phone; A line connecting portion 36; A display section 34; A memory 35 for storing programs and data; An antenna 45 for transmitting and receiving radio signals; Up-converts the data coming from the line connection unit 36 or the general telephone connection unit 31 to a radio frequency signal, transmits the data to the wireless antenna, receives the radio signal, down-converts it, converts it into an intermediate frequency signal, and demodulates the digital signal. An RF module 37 for reproducing data; And in the normal mode, the general telephone is connected to the public telephone network, and when the registration button 32a is input, the data of the city phone is stored and registered in the home mode slot to indicate that it is being registered. Deleting from the home mode slot and indicating that it is being released, and when the call of the city phone is requested through the RF module, the corresponding city phone is connected to the line connection through the RF module, and when the call is received from the line connection unit, the general telephone and the RF It may include a control means for controlling to call the registered city phone through the module to prevent unnecessary waste of resources, and to provide an inexpensive domestic base station.

Description

Simple home base station

The present invention relates to a home base station (HBS) that allows a city phone to be used as a cordless phone in a home, and in particular, a simple home base station (SHBS: Simple) that can be implemented very cheaply by using an existing phone as it is. Home Base Station).

In general, a public wireless telephone network using a city phone is known as CT-2, which can be defined as a universal mobile communication service that has developed a conventional home wireless telephone (CT-1) into a public wireless telephone. CT-2 is a system for pedestrian communication service compared to existing cellular, and minimizes the mobile network and directly connects to the public telephone network. Thus, it is easy to implement a city phone and a base station, thereby minimizing the economic burden at a low usage fee. . CT-2 Plus (+) is an improvement on outgoing CT-2. It implements incoming and outgoing functions through exchange function using wireless call network and voice mail.

In the city phone system, as shown in FIG. 1, the city phones 10a and 10b are airborne through a plurality of base stations 12a and 12b: BS connected to the public telephone network 16 or a home base station 14: HBS installed in a home. Can be connected to the telephone network, and the base station management system 17 is configured to manage the jurisdiction base stations via the public telephone network 16, and the subscriber management system 18 is connected to the base station management system 17 to manage all subscribers. have.

Here, the TDD scheme of 72 Kbps (144 bits, 2ms frame) is used for the radio link between the base station and the city phone, and the multiplexed D channel (signal channel), B channel (voice and data channel), and SYNC channel (synchronous channel) are used. It consists of. These channels are divided into three types of signal frames (MUX1, MUX2, and MUX3) according to the multiplexing method. MUX1 is used to transmit D and B channels, and MUX2 and MUX3 are used to transmit D and sync channels. That is, the MUX3 frame is used by the terminal to request a radio link to make a call to the base station. The MUX2 frame is used to establish a radio link between the base station and the terminal. The MUX1 is used to exchange information through the established radio link. Frame.

However, in the city phone system, the conventional home base station combines some functions of the telephone and the base station, which is very expensive. In particular, when a new base station is newly purchased, there is a problem in that resources are wasted because the existing telephone is not used, and thus, the overall cost is increased.

Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a simple home base station that can be used as it is and can be implemented at a very low price.

That is, unlike the conventional home base station, the present invention excludes a handset, a handset, a dial button, and the like, and accepts an existing general telephone through a line interface with a general telephone. It is a low-cost simple home base station that can be used as a 900MHz cordless phone.

In order to achieve the above object, the apparatus of the present invention includes a general telephone connection unit for connecting a general telephone; A button for registering and releasing the city phone; A line connection unit for connecting to a public telephone network and a telephone line; A display unit for displaying the registered and released states of the city phone; Memory for storing programs and data; An antenna for transmitting and receiving radio signals; RF module for up-converting data from the line connection unit or general telephone connection unit to high-frequency signal and transmitting it to the wireless antenna, receiving and down-converting the radio signal, converting it into an intermediate frequency signal, and demodulating and reproducing digital data. ; In the normal mode, the general telephone connection unit and the line connection unit are connected to connect the general telephone to the public telephone network. When the button for registration is input, the data of the city phone input through the RF module is stored and registered in the home mode slot. In addition, the display unit is turned on to indicate that it is being registered, and when a button for releasing is inputted, data of the city phone received through the RF module is deleted from the home mode slot, and the display unit is turned on to indicate that it is being released. Control means for connecting the corresponding city phone to the line connection through the RF module when the call of the city phone is requested through the RF module, and controls to call the city phone registered through the RF module and the general telephone when incoming from the line connection. It is characterized by including.

1 is a block diagram showing the configuration of a general city phone system;

2 is a schematic diagram of a telephone system using a simple home base station according to the present invention;

3 is a block diagram showing a simple home base station according to the present invention;

4 is an external view of a simple home base station according to the present invention;

(A) is the rear view and (b) is the top view.

* Explanation of symbols for main parts of the drawings

10a, 10b: city phone 12a, 12b: base station

14: home base station 16: public telephone network (PSTN)

17: base station management system 18: subscriber management system

22: landline phone 24: simple home base station

31: general telephone connection part 32: button part

33: control unit 34: LED

35: memory 36: line connection

37: RF module 41: receiver

42: frequency synthesizer 43: transmitter

44: time division redundancy (TDD) switch 45: antenna

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

As shown in FIG. 2, the home base station according to the present invention is connected to the public telephone network 16 by using the existing general telephone 22 by being connected by a telephone line between the existing general telephone 22 and the public telephone network 16. The connection is enabled and wirelessly connected to the city phone 10a so that the city phone 10a can be used as a cordless phone.

In general, the city phone has a PUBLIC mode and a HOME mode. In the public mode, the city phone is connected to the public telephone network through the base station, and only the outgoing call is possible. In this case, the incoming call is collectively performed for all city phones registered in the home base station.

Since the simple home base station (SHBS) 24 according to the present invention enables the existing telephone 22 to be used as it is, it is not necessary to waste resources unnecessarily and implement a home base station at low cost.

As shown in FIG. 2, the home base station according to the present invention includes a general telephone connection unit 31, a button unit 32, a control unit 33, a display unit 34, a memory 35, an RF module 37, and a line. The connection part 36 and the antenna 45 are comprised. The general telephone connection unit 31 includes a connector 31a for connecting a telephone as shown in Fig. 4A, and establishes a connection to the ordinary telephone (22 in Fig. 3) under the control of the control unit 33. In addition, as shown in (b) of FIG. 4, the button part 32 includes at least a button 32a for registration and a button 32b for release. The display unit 34 is composed of LEDs, which are composed of LEDs 34a for indicating registration and LEDs 34b for indicating release, as shown in FIG. The line connection unit 36 is for connecting the home base station 24 to the public telephone network 16 by a telephone line, including a connector 36a for connecting a telephone line as shown in FIG.

As shown in FIG. 3, the RF module 37 includes a transmitter 43, a receiver 41, a frequency synthesizer 42, and a TDD switch 44. The frequency synthesizer 42 generates a local oscillation signal for selecting an RF channel under the control of the controller, and the transmitter 43 modulates and amplifies the digital signal transmitted from the controller 36 and then the frequency synthesizer in the mixer. Synthesized with the local oscillation frequency of (42) and upconverted to an RF signal of about 912 MHz band, then filtered and amplified and transmitted through the antenna 45. The receiver 41 amplifies an RF signal of about 912 MHz band transmitted from the antenna 45, synthesizes it with a local oscillation signal of the frequency synthesizer 42 in a mixer, downconverts it to an IF signal of 20.25 MHz, and then filters it. After the amplification, the signal is demodulated into a digital signal and transmitted to the control unit 36.

The time division duplexing (TDD) switch unit 44 is used to separate the transmission and reception signals. While transmitting the RF signal transmitted from the antenna to the antenna 45 so as not to be transmitted to the receiver 41. The memory 35 is composed of a ROM and an EEPROM, and stores programs and data performed by the controller 33.

The control unit 33 connects the general telephone connection unit 31 and the line connection unit 36 in the normal mode to connect the general telephone to the public telephone network, and when the button 32a for registration is pressed, the RF module 37 In addition to storing the data of the city phone input through the home mode slot to register, and the LED (34a) of the display unit is turned on to indicate that the registration. When the button 32b for release is pressed, the control unit 33 deletes the corresponding data from the home mode slot and lights up the LED 34b of the display unit according to the input of the city phone received through the RF module 37. When the city phone is requested to be transmitted through the RF module 37, the corresponding city phone is connected to the line connection unit 36 through the RF module 37, and the call is received from the line connection unit 36. The city general telephone connection unit 31 sends a ring signal to the registered city phones through the RF module 37.

As described above, the simple home base station (SHBS) according to the present invention implements the function of the home base station at a very low cost while using an existing telephone as it is, thereby preventing unnecessary waste of resources and providing a low cost home base station. It can work.

Claims (3)

A general telephone connection portion 31 for connecting a general telephone; A button 32 for registering and releasing the city phone; A line connecting portion 36 for connecting to a public telephone network with a telephone line; A display unit 34 for displaying the registered and released states of the city phone; A memory 35 for storing programs and data; An antenna 45 for transmitting and receiving radio signals; Up-converts the data coming from the line connection unit 36 or the general telephone connection unit 31 to a radio frequency signal, transmits the data to the wireless antenna, receives the radio signal, down-converts it, converts it into an intermediate frequency signal, and demodulates the digital signal. An RF module 37 for reproducing data; And In the general mode, the general telephone connection unit and the line connection unit are connected to connect the general telephone to the public telephone network, and when the button 32a for registration is inputted, data of the city phone input through the RF module 37 is input to the home mode slot. In addition to storing and registering in the control unit to control the display unit to indicate that the registration, and when the button for release is input to delete the data of the city phone received through the RF module in the home mode slot and control the display unit is being released. When the call of the city phone through the RF module is required, the corresponding city phone is connected to the line connection unit through the RF module, and when the incoming call is received from the line connection unit, the registered phone is called through a general telephone and the RF module. Simple home base station comprising a control means for controlling. 2. The RF module 37 according to claim 1, wherein the RF module 37 generates a local oscillation signal for selecting an RF channel under the control of the control means, and modulates data input from the control means. Transmitter 43 which synthesizes the local oscillation signal of the frequency synthesizer, up-converts the signal, and transmits it as a high frequency signal. And a receiver 41, and a time division duplex switch 44 for separating transmission and reception. The simple home base station according to claim 1, wherein the memory is implemented in a ROM and an Ipyrom.