KR100349018B1 - Apparatus and control method for WLL terminal by connecting telephone - Google Patents

Abstract

The present invention provides an integrated wireless subscriber network terminal device interworking with a general telephone and a control method thereof. The present invention includes: an RF / IF processing unit for processing a received signal; A mobile station modem connected to the RF / IF processing unit for processing the demodulation of the input signal and processing the baseband digital signal; A codec connected to the mobile station modem to perform analog-to-digital conversion of data; An IF converter for converting the digital baseband signal to be transmitted by the control of the mobile station modem into a modulated IF signal; A baseband converter for converting the modulated IF signal of the RF / IF processor into digital baseband data; A ring generating unit for generating ring signals to all interworking general telephones when a signal for calling a terminal by the base station is detected; A loop detector for informing a mobile station modem of an on-hook / off-hook state of a general telephone; It is composed of DTMF receiver which receives dual tone input from general telephone and converts it into digital data, and it is expandable by attaching general telephone to expandable WLL terminal which is able to talk only by terminal alone. It is possible to realize the advantages of the type of phone based on its advantages and various functions simultaneously.

Description

Integrated wireless subscriber network terminal device interworking with general telephone and control method {Apparatus and control method for WLL terminal by connecting telephone}

The present invention relates to an integrated wireless subscriber network (WLL) terminal device interworking with a general telephone and a control method thereof. In particular, the present invention relates to an integrated WLL terminal that can be used only by a terminal alone. The present invention relates to an integrated wireless subscriber network terminal device interworking with a general telephone that is suitable for simultaneously implementing the advantages of a deterministic type detachable WLL terminal and various types of telephones based on various functions.

In general, a WLL system using a code division multiple access (CDMA) wireless access standard can be divided into an N-CDMA (Narrowband-CDMA) (IS-95) method and a W-CDMA (Wideband-CDMA) method. Compared to the N-CDMA scheme, the W-CDMA scheme has a difference in frequency bandwidth, voice band data rate, and ISDN BRI (2B + D) service.

In addition, the wireless subscriber network system is a system that replaces a predetermined section between each subscriber's home and the public switched telephone by wireless instead of wires in the existing Public Switching Telephone Network (PSTN) system. Responsible for connection and disconnection of a bearer by a mobile terminal (MT) that receives a user's signal from a telephone (TE) in a home and transmits the signal to a base station, and the subscriber wireless access device (RIU) wirelessly. A base station controller (BS), a base station controller (BSC) that performs a function of connecting a call link between the switch and the base station, and an existing public line switching network (PSTN); It consists of a mobile subscriber line network switch (MSC) that is responsible for link establishment of a call.

Therefore, the wireless subscriber network can easily install the telephone network than the existing wired network system, the cost of facility expansion is low, and the flexibility of the network design according to the increase of subscribers has the advantage.

In addition, unlike conventional narrowband CDMA networks, W-CDMA wireless subscriber systems enable the implementation of integrated services digital network (ISDN) services and packet networks as well as call, fax and data transmission. .

1 is a block diagram of a conventional integrated wireless subscriber network system.

As shown here, the integrated WLL is composed of a base station 10 and a mobile station terminal 20 connected thereto.

Figure 2 is a block diagram of a conventional split wireless subscriber network system.

As shown therein, the separate WLL includes a base station 10, a telephone interface 30 connected to the base station 10, and a general telephone 40 connected to the telephone interface 30.

Thus, the separate WLL system of FIG. 2 adds a telephone interface 30 that includes a telephone interface and a ring generator as compared to the integrated WLL system of FIG.

3 is a block diagram of a device incorporating a conventional integrated wireless subscriber network system and a wireless telephone handset.

As shown here, the base station 10, the terminal 20 is connected to the base station 10, the PC 50 is connected to the terminal 20, and the wireless telephone handset 60 is connected to the terminal do.

Thus, FIG. 3 is configured by adding software for an RF module and an interface as compared to the integrated WLL system of FIG.

4 is a detailed block diagram of a terminal in FIGS. 1 and 3.

As shown therein, an RF / IF processor 21 for processing a radio frequency / intermediate frequency (RF / IF) signal of a signal received through an antenna; A memory 22 connected with the mobile station modem 23 to store data; A mobile station modem (23) connected to the RF / IF processing unit for performing demodulation of an input signal; Codec (Coder-Decoder) 24 is connected to the mobile station modem 23 to perform analog-to-digital conversion of data.

Referring to the operation of the conventional device configured as described above in detail.

First, the integrated WLL system of FIG. 1 operates as follows.

That is, based on the corresponding air interface specification (IS-95A, J-STD-008) under the frequency resource allocated between the base station 10 and the terminal 20, the origination call processing, the hand signal (Termination) Call) Performs complex procedures such as processing and registration, and calls are made through voice channels.

Meanwhile, the separate WLL system of FIG. 2 operates as follows.

That is, the separate WLL system generates a ring to all telephones connected through the telephone interface 30 when a hand signal is received from the base station 10 through the paging channel.

The interlocking telephone is connected by wire (RJ-11).

When the general telephone 40 during the ring is off-hook, it recognizes the off-hook state and transmits a response message to the base station 10, and a call path is formed.

In addition, when the telephone 40 generates an outgoing call, the telephone 40 enters the dial transmission mode by detecting a loop and giving a dial tone to the user.

Recognizing the digits input by the user according to the tone and pulse delay, and then transmits the information to the base station 10, the negotiation for call establishment is made and the call path is formed.

The separate type is dedicated only to the protocol with the base station, and the voice and user interface are only possible with the interlocked phone. The interlocking telephone can connect a general telephone as well as a wireless telephone.

Meanwhile, the operation of the system combining the integrated wireless subscriber network system of FIG. 3 and the wireless telephone handset is as follows.

The device of FIG. 3 differs from the separate WLL system described in FIG. 2 in that the interface of the interworking telephone uses wireless rather than wired.

That is, in addition to the RF module for communication with the base station, another RF module for interfacing with the wireless handset is required.

Communication between the terminal 20 and the wireless handset 60 can be performed through the RF module and the interface software added, and information such as digits, rings, on-hooks, and off-hooks can also be communicated with each other via RF. .

In the configuration of FIG. 3, the implementation is limited only to the wireless handset supplied with the terminal, and thus cannot be interworked with existing general telephones.

However, the configuration of FIG. 3, which is designed in consideration of scalability, shows interference between the base station and RF, a medium for communication with a base station, and RF, a medium for communication with a wireless handset. There was a problem that the error rate is high during communication and can be extended only to the wireless terminal supplied as a package and cannot be extended to other general telephones.

In addition, there is a disadvantage that the terminal itself does not have a calling function, and only the protocol with the base station is dedicated and delivered, so that there is no benefit to the user.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to expand the interworking WLL terminal, which can be used only by the terminal alone, in order to extend the interworking with a general telephone. The present invention provides an integrated wireless subscriber network terminal device interworking with a general telephone that can simultaneously realize the advantages of a type of telephone based on the advantages of a separate WLL terminal and various functions.

In order to achieve the above object, the integrated wireless subscriber network terminal device interworking with a general telephone according to an embodiment of the present invention,

An RF / IF processor configured to process an RF / IF signal of a signal received through an antenna; A mobile station modem connected to the RF / IF processing unit for performing demodulation and demodulation of an input signal, processing a baseband digital signal, and executing driving software of a terminal; A codec connected to the mobile station modem to perform analog-to-digital conversion of data; An IF converter for converting the digital baseband signal to be transmitted by the control of the mobile station modem into a modulated IF signal; A baseband converter converting the modulated IF signal of the RF / IF processor into digital baseband data; A ring generating unit for generating a ring signal to all interworking general telephones when a signal for calling a terminal by a base station is detected by the mobile station modem; A loop detector for informing the mobile station modem of information on the on-hook / off-hook status of the telephone; The technical configuration is characterized in that it consists of a DTMF receiving unit for receiving a dual tone input from the ordinary telephone and converts it into digital data for the mobile station modem to determine.

In order to achieve the above object, the integrated wireless subscriber network terminal control method interworking with a general telephone according to an embodiment of the present invention,

When the current is supplied from the current feeding unit by lifting the handset in the landline telephone, the mobile station modem detects the off-hook through the loop detection unit and switches to the off-hook state; Detecting, by a DTMF receiver, a DTMF signal of a counterpart telephone number input from the general telephone and informing the mobile station modem; The mobile station modem converts the corresponding digits detected by the DTMF receiver into a message form for delivery on the air, and then transmits the digits to a base station through an RF / IF processor; The base station performs a step of making a ringback tone by calling the receiver through a counterpart exchange and performing a call mode when the counterpart answers.

In order to achieve the above object, the integrated wireless subscriber network terminal control method interworking with a general telephone according to an embodiment of the present invention,

When the call signal is input from the base station to the RF / IF processing unit of the terminal on the air, the RF / IF processing unit transferring the input signal to the mobile station modem; The mobile station modem analyzing the call message to drive a ring generator to ring a ringing interphone; In response to the general telephone, the mobile station modem recognizes the off-hook state through a loop sensing unit and connects a call path to perform a mutual call mode.

1 is a block diagram of a conventional integrated wireless subscriber network system,

Figure 2 is a block diagram of a conventional split wireless subscriber network system,

3 is a block diagram of a device combining a conventional integrated wireless subscriber network system and a wireless telephone handset,

4 is a detailed block diagram of a terminal in FIGS. 1 and 3;

5 is a block diagram of an integrated wireless subscriber network system interworking with a general telephone according to an embodiment of the present invention;

6 is a detailed block diagram of a terminal in FIG.

7 is a flowchart illustrating transmission call processing in an integrated wireless subscriber network terminal control method interworking with a general telephone according to an embodiment of the present invention;

8 is a flowchart illustrating hand signal processing in an integrated wireless subscriber network terminal control method interworking with a general telephone according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: base station 40: general telephone

50: PC 70: terminal

71: RF / IF processing unit 72: memory

73: mobile station modem 74: codec

75: IF converter 76: baseband converter

77 ring generation unit 78 loop detection unit

79: DTMF receiver 80: current feeding unit

Hereinafter, an embodiment according to the technical idea of the integrated wireless subscriber network terminal device interworking with the general telephone apparatus of the present invention and a control method thereof will be described.

5 is a block diagram of an integrated wireless subscriber network system interworking with a general telephone according to an embodiment of the present invention.

As shown therein, the base station 10 performs wireless connection between the exchange and the terminal; Wirelessly connected to the base station 10 and wired to a plurality of general telephones 40, the dial button digits pushed by the general telephone 40 is recognized to display the corresponding number on the LCD and related messages and statuses. Terminal 70 for displaying; It is composed of a general telephone 40 which is connected to the terminal 70 by a wire and performs a telephone function.

The reference numeral 50 is a personal computer (PC) connected to the terminal 70 by wire to process data through the terminal 70.

6 is a detailed block diagram of a terminal in FIG.

As shown therein, an RF / IF processor 71 for processing an RF / IF signal of a signal received through an antenna; A memory 72 connected with the mobile station modem 73 to store data; A mobile station modem (73) connected to the RF / IF processing unit for performing demodulation and demodulation of an input signal, processing a baseband digital signal, and executing software of the terminal (70); A codec 74 connected to the mobile station modem 73 for performing analog-to-digital conversion of data; An IF converter (IFT 3000, Intermediate Frequency Transformer) 75 for converting the digital baseband signal to be transmitted by the control of the mobile station modem 73 into a modulated IF signal; A baseband converter (IFR 3000) 76 for converting the modulated IF signal of the RF / IF processor 71 into digital baseband data; A ring generating unit (77) for generating a ring signal to all interworking telephones (40) when the signal for calling the terminal (70) from the base station (10) is recognized by the mobile station modem (73); A loop detection unit (78) for checking the on-hook and off-hook states of the general telephone (40) and notifying the mobile station modem (73); A dual tone multi frequency (DTMF) receiving unit 79 for converting an analog signal input from the general telephone 40 into digital data so that the mobile station modem 73 can determine the dual tone; It is composed of a current feeding unit (Current Feeding) (80) for supplying the voltage and current necessary to activate the general telephone (40).

7 is a flowchart illustrating transmission call processing in an integrated wireless subscriber network terminal control method interworking with a general telephone according to an embodiment of the present invention.

As shown in the drawing, when the current is supplied from the current feeding unit 80 by lifting the handset in the general telephone 40, the mobile station modem 73 detects the off-hook through the loop detector 78 and switches to the off-hook state. Step ST11 to ST13; Detecting the DTMF signal of the other party's telephone number input from the general telephone 40 in the DTMF receiving unit 79 and informing the mobile station modem 73 (ST14); The mobile station modem 73 converts the digits detected by the DTMF receiver 79 into a message form for delivery on the air, and then transmits the digits to the base station 10 through the RF / IF processing unit 71. Step ST15; The base station 10 performs a step (ST16) (ST17) to make a ringback tone by calling the called party through a counterpart exchange and making a call mode when the counterpart answers.

8 is a flowchart illustrating hand signal processing in an integrated wireless subscriber network terminal control method interworking with a general telephone according to an embodiment of the present invention.

As shown here, when a call signal from the base station 10 is input to the RF / IF processing unit 71 of the terminal 70 on the air, the RF / IF processing unit 71 transmits the input signal to the mobile station modem 73 Step ST21); The mobile station modem 73 analyzes the call message and drives the ring generating unit 77 to ring the interworking general telephone 40 (ST22 to ST24); In response to the general telephone 40, the mobile station modem 73 recognizes the off-hook state through the loop detection unit 78 and connects the call paths so that the mutual call mode is established (ST25 to ST27). Perform.

An integrated wireless subscriber network terminal device interworking with a general telephone according to the present invention configured as described above and the operation of the control method thereof will be described in detail with reference to the accompanying drawings.

First, the base station 10 allows the exchange and the terminal 70 to be connected, and the terminal 70 is wirelessly connected to the base station 10 and performs a connection to the general telephone to interwork with the general telephone 40. The PC 50 is wired to the terminal 70 to process data through the terminal 70, and the general telephone 40 is wired to the terminal 70 to perform a telephone function.

Thus, the operation in the terminal 70 is as follows.

The RF / IF processing unit 71 processes the RF / IF signal of the signal received through the antenna, and the memory 72 is connected to the mobile station modem 73 to store data.

The mobile station modem 73 is a central processing unit connected to the RF / IF processing unit 71 to perform modulation and demodulation of an input signal, to process a baseband digital signal, and to execute software of the terminal 70. It controls not only the user interface (keypad, LCD, ringer, earphone, etc.) and memory management but also the baseband converter, audio circuitry, and RF / IF processing.

The codec 74 is connected to the mobile station modem 73 to perform analog-to-digital conversion of data. The codec 74 converts an analog signal into a digital signal and converts the digital signal into an analog signal.

The IF converter 75 converts the digital baseband signal to be transmitted by the control of the mobile station modem 73 into a modulated IF signal. That is, if the mobile station modem 73 modulates the data for transmission and then transfers the digital baseband data to the IF converter 75, the IF converter 75 converts the digital baseband data to be transmitted to the modulated IF signal. Change.

The baseband converter (IFR 3000) 76 converts the modulated IF signal of the RF / IF processor 71 into digital baseband data. The mobile station modem 73 demodulates the digital baseband data received from the baseband converter 76.

On the other hand, the ring generating unit 77 generates a ring signal to all the general telephones 40 connected when the signal for calling the terminal 70 from the base station 10 is recognized by the mobile station modem 73. When calling a subscriber from a switch in a general wired network, the terminal 70 receives a call message from the base station 10 through a wireless section as if it transmits a ring of about 80 V RMS (Root Mean Square value) and 20 Hz to the corresponding subscriber. The terminal 70 can generate ring voltage and frequency to the interlocked telephone as in the exchange.

The loop detector 78 checks the on-hook and off-hook states of the general telephone 40 and informs the mobile station modem 73. That is, the loop detection unit 78 detects off-hook and on-hook states of the interworking general telephone. When the handset is lifted from the telephone, a call path is formed and a current flows. This interruption of current flow is converted to a logic level through devices and circuits such as optocouplers and reported to the input portion of the mobile station modem 73.

The DTMF receiving unit 79 converts the analog signal input from the interworking general telephone 40 into digital data so that the mobile station modem 73 can determine the dual tone. Here, there are two dial methods of the general telephone 40, namely DTMF and pulse method. DTMF is an analog signal composed of two low and high frequencies that correspond to digits (1 to 9,0, *, #). In order to recognize this signal by the mobile station modem 73, which is the central processing unit of the terminal 70, the part converting the analog signal into a digital signal recognizes the dial recognized from the telephone 40 interlocked by the DTMF receiver 79. do.

The current feeding unit 80 supplies the voltage and current necessary to activate the interlocked telephone 40. That is, in order to activate the interlocked telephone 40, a voltage of 48 volts and a current of at least 20 mA must be supplied at both ends of the tip and the ring. That is, the current feeding unit 80 is a power supply portion.

Meanwhile, an operation of processing an origination call will be described in detail with reference to a flowchart showing transmission call processing in the integrated wireless subscriber network terminal control method interworking with a general telephone according to an embodiment of the present invention.

First, when a current is supplied from the current feeding unit 80 by lifting the handset in the general telephone 40, the mobile station modem 73 detects the off-hook through the loop detector 78 and switches to the off-hook state.

Then, the DTMF receiving unit 79 detects the DTMF signal of the other party's telephone number input from the general telephone 40 and informs the mobile station modem 73.

Accordingly, the mobile station modem 73 converts the corresponding digit detected by the DTMF receiver 79 into a message form for delivery on the air, and then transfers the digit to the base station 10 through the RF / IF processing unit 71. .

Then, the base station 10 calls the receiver through the counterpart exchange so that the ringback tone is heard, and when the counterpart answers, the call mode is established to process the transmission call.

FIG. 8 is a flowchart illustrating hand signal processing in an integrated wireless subscriber network terminal control method interworking with a general telephone according to an embodiment of the present invention. Referring to this, an operation of processing a termination signal will be described in detail.

First, the call signal from the base station 10 is input to the RF / IF processing unit 71 of the terminal 70 on the air.

The RF / IF processing unit 71 then transfers the input signal to the mobile station modem 73.

The received mobile station modem 73 analyzes the call message and drives the ring generator 77.

Then, the ring generator 77 allows the ring to ring in the intercommunication telephone 40 under the control of the mobile station modem 73.

Thus, when the general telephone 40 responds, the mobile station modem 73 recognizes the off-hook state through the loop detection unit 78 and connects the call paths so that a mutual call mode is established to process the hand signal.

As described above, the present invention implements the advantages of the type of the telephone based on the advantages and the various functions of the expandable separate WLL terminal by allowing the extension of the integrated WLL terminal that can be used to call only the terminal. Will be done.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. That is, the present invention can be applied to a communication system using not only W-CDMA but also N-CDMA. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the integrated wireless subscriber network terminal device and the control method interworking with the general telephone according to the present invention can be interlocked with the telephone (wired, wireless) which is conventionally used to solve the problem of scalability in the integrated WLL terminal. Implementing so as to implement the phone's own functions, as well as the effect that it is possible to communicate through the use of a regular telephone.

Therefore, the present invention has a function as a regular telephone, can be linked to the existing telephone in use, can recognize the digit of the dial button pressed on the telephone and display the corresponding number on the LCD, and related messages and The number of phones that can display the status and can be interlocked according to the design of the ring generator can be extended to several units, and can be used as a simple radio switching matching device, which is also suitable for SOHO (SmallOffice / Home Office). .

Claims (4)

An RF / IF processor configured to process an RF / IF signal of a signal received through an antenna; A mobile station modem connected to the RF / IF processing unit for performing demodulation and demodulation of an input signal, processing a baseband digital signal, and executing driving software of a terminal; A codec connected to the mobile station modem to perform analog-to-digital conversion of data; An IF converter for converting the digital baseband signal to be transmitted by the control of the mobile station modem into a modulated IF signal; A baseband converter converting the modulated IF signal of the RF / IF processor into digital baseband data; A ring generating unit for generating a ring signal to all interworking general telephones when a signal for calling a terminal by a base station is detected by the mobile station modem; A loop detector for informing the mobile station modem of information on the on-hook / off-hook status of the telephone; And a DTMF receiver which receives the dual tone input from the telephone and converts the dual tone into digital data for the mobile station modem to determine. The method of claim 1, And a current feeding unit for supplying a voltage and a current necessary for activating the general telephone. When the current is supplied from the current feeding unit by lifting the handset in the landline telephone, the mobile station modem detects the off-hook through the loop detection unit and switches to the off-hook state; Detecting, by a DTMF receiver, a DTMF signal of a counterpart telephone number input from the general telephone and informing the mobile station modem; The mobile station modem converts the corresponding digits detected by the DTMF receiver into a message form for delivery on the air, and then transmits the digits to a base station through an RF / IF processor; The base station calls to the receiver through the counterpart switch to hear the ringback tone, and when the counterpart responds, the call mode is established. When the call signal is input from the base station to the RF / IF processing unit of the terminal on the air, the RF / IF processing unit transferring the input signal to the mobile station modem; The mobile station modem analyzing the call message to drive a ring generator to ring a ringing interphone; The mobile station modem recognizes the off-hook state through the loop detection unit and connects the call paths so that the intercommunication mode is established. Terminal control method.