KR100349652B1 - Fixed Subscriber Unit of WLL which is able to distinguish the receiver telephone and distingquishing method - Google Patents

Abstract

The present invention relates to an apparatus and a method for distinguishing a receiver in a wireless subscriber network terminal in which only a telephone of a desired receiver rings. The present invention relates to the same number of voice ROMs and telephones that store guide messages in a wireless subscriber network terminal. If the sender selects and presses the receiver's number according to the message from the voice ROM, the MSM in the terminal sends ring data only to the SLIC to which the telephone of the requested number is connected. The slick receiving the ring data rings the phone so that only the selected phone rings.

Description

Fixed subscriber unit of WLL which is able to distinguish the receiver telephone and distingquishing method}

The present invention relates to a wireless subscriber network system, and more particularly, to a narrowband wireless subscriber network, that is, a separate terminal of a narrow WLL (N-WLL) system, which has a slick for each of a plurality of telephones and includes a message for selecting a desired receiver. An apparatus and method for distinguishing a receiver in a wireless subscriber network terminal provided with a voice ROM (ROM) to ring only a telephone of a receiving party.

In general, wireless local loop (WLL) is a technology that provides a subscriber line wirelessly, unlike a conventional wired subscriber network connecting a switch and an individual general subscriber through a wired subscriber line. After the development of RF technology and the development of semiconductor and wireless communication technology in the late 1980s, the previous problems such as frequency efficiency, wireless channel quality, and cost per subscriber were solved. In addition, WLL is easier to construct subscriber lines than existing wired subscriber networks, and can be used as an emergency subscriber line in preparation for natural disasters, and can provide various services such as POTS, data, and ISDN.

Due to the above advantages, WLL attracts new subscribers early and establishes new subscribers quickly in urban areas. In particular, WLL is gaining attention as a communication infrastructure of developing countries where wired network structure is poor. Products developed for WLL include satellite system, fixed microwave system, cellular technology system and cordless system system. have.

The system employing this cellular technology has three multiple access methods, namely, Frequency Division Multiplexing Access (FDMA), Time Division Multiplexing Access (CDMA) and Code Division Multiple Access (CDMA). Dvision Mutiplex Access) is used. Commercially available products include FDMA and TDMA, but they are shifting to CDMA, which has a much larger subscriber capacity than other access methods. WLL has similar characteristics to mobile communication network in terms of using wireless channel as a communication medium, but it has the advantage that radio wave environment of WLL network is much better than that of mobile communication network because there is no mobility. Have the same characteristics

First, the propagation environment of the mobile communication network is located at the position where the antenna height is lower than the surrounding buildings, and as a result, it becomes a non-line-of-sight environment, which blocks the direct waves by the surrounding buildings, reflects, and diffracts. Although the radio wave path loss is about 40dB / decade, the radio wave environment of the WLL network can be installed in a high place such as the roof of the building, so the line-of-sight environment is secured so that the radio wave path loss is 20dB / decade. It is small enough to service a larger area with the same transmit power.

Second, since the radio wave environment of WLL network is fixed point-to-point communication, fading due to multipath is much less than that of point-to-mobile mobile communication network. Eb / No required for mobile radio wave environment using 30KHz channel bandwidth is 18dB, but Eb / No required for radio wave environment of WLL network using same channel bandwidth is only about 14dB required for low power transmitter Do.

Third, since the WLL network is a fixed wireless communication network, no handoff occurs. Therefore, it is not necessary to secure an extra handoff radio channel necessary for communication service without disconnection in the mobile communication network, and it is not necessary in the WLL network. This extra radio channel can be used for general calls, which increases the efficiency of the radio channel and the capacity of subscribers. The increase effect of can be obtained. In addition, the wireless link between each building and the base station can be established in a direction to reduce interference to a particular subscriber. Since the wireless link is unchanged unless the subscriber increases too much or the cell is divided after being installed, the wireless link of the WLL network cannot be changed. The design is much simpler than a mobile network.

Fourth, since the WLL network is a fixed wireless communication, it is possible to reduce the co-channel interference effect on individual subscribers by using a directional antenna for the forward / reverse link, thereby reducing the frequency reuse distance. Reduction of frequency reuse distance results in an increase in subscriber capacity per unit area.

The wireless subscriber network system may include a separate terminal located in a subscriber's home as a subscriber access device, a base station for converting a wireless signal received from the separate terminal into a wired signal, and a switch connecting a transmitting side to a receiving side. The detachable terminal of the wireless local loop system is connected to a general telephone, facsimile or personal computer which is an external device through a port.

The wireless subscriber network system may be classified into a narrowband wireless subscriber network system (Narrowband WLL) and a wideband wireless subscriber network system (Wideband WLL), and both of them use CDMA. In particular, the narrowband wireless subscriber network system is only mobile in the system applied to the mobile communication technology since the mid 90's due to the rapid decrease of the system and the terminal due to the rapid development of the mobile communication technology and the increase in the telephone demand of developing countries with low telephone penetration rate. It was developed to be removed and developed as a "Fixed Subscriber", to supply to developing countries.

In addition, the narrowband wireless subscriber network system mainly processes voice, can process low-speed data, fax, etc., and in the case of voice, can provide a level of service equivalent to existing wired quality.

And subscriber capacity is also increasing because it accommodates fixed subscribers than conventional mobile communications.

1 is a block diagram showing a configuration of a detachable terminal of a wireless subscriber network system according to the prior art.

As shown, an RF unit 10 for processing a radio frequency (RF) signal transmitted and received between a wireless subscriber network (WLL) base station and a subscriber matching device, and a CPU for controlling a circuit is built in the RF unit 10. The MSM (Mobile Station Modem) section 12 and the digital / analog signal output from the MSM (12) perform the transmission rate conversion and digital / analog conversion function for each line of the analog respectively. And a codec unit 14 for digital conversion, and a subscriber line interface circuit (SLIC) unit 16 for performing a matching function with an analog line and providing a ring signal and various tone signals; And a plurality of general telephones 18 connected to the slick portion 16 via analog lines.

In the narrowband wireless subscriber network system configured as described above, analog voice data input through the general telephone 18 is converted into digital voice data by the codec unit 14 through a line port (not shown) and a slick unit 16. In response to the control of the CPU embedded in the MSM unit 12, the RF unit 10 is transmitted to the base station. On the contrary, the voice data received through the antenna is the RF unit 10, the MSM unit 12, and the codec unit 14. ), And is sent to the subscriber's general telephone 18 via the slick unit 16.

However, in the configuration as described above, since a plurality of common telephones 18 are connected in a bridge form to one slick unit 16, all general telephones connected to the slick unit 16 without distinction of a telephone when an incoming call is received. The ring is ringing, so there is a problem that cannot distinguish who the receiver is.

Therefore, the present invention has been proposed to solve the above problems according to the prior art,

An object of the present invention is to provide a voice ROM storing a guide message in a wireless subscriber network terminal and the number of slicks equal to the number of telephones, so that a sender can select a receiver according to a message from the voice ROM. In addition, the terminal provides a device and method for distinguishing a receiver in a wireless subscriber network terminal that allows the corresponding slick to process the ring data so that a direct call can be made with the desired person without passing through another person.

Features of the apparatus for distinguishing a receiver in a wireless subscriber network terminal according to the present invention for achieving the above object,

A voice ROM storing a voice message for guiding the extension number of each recipient;

An MSM unit for retrieving the extension number guide message of the receiver from the voice ROM and transmitting it to the transmitting side when the incoming ring arrives, and transmitting a ring signal only to the corresponding slick (SLIC) when an arbitrary extension number is selected from the transmitting side;

It comprises a slick unit having a plurality of slicks (SLIC) for connecting the call path by ringing only the selected telephone (receiver) according to the command of the MSM unit.

In addition, in order to achieve the above object, a feature of the method for distinguishing a receiver in a wireless subscriber network terminal according to the present invention

Sending an extension number guide message stored in a voice ROM inside the terminal to the sender when the ring is received at the wireless subscriber network terminal;

If the receiver number is selected by the sender, recognizing data for the number selected by the sender in a DTMF receiver in the MSM of the terminal;

Transmitting ring data to a slick to which a telephone corresponding to the recognized recipient number is connected;

Ringing the corresponding telephone in the slick receiving the ring data to ring only the selected telephone;

If the receiver is hooked off after the ring transmission (Hook Off) comprises the step of connecting the codec unit and the slick to form a call path.

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

2 is a schematic structural diagram of a device for distinguishing a receiver in a wireless subscriber network terminal according to the present invention;

3 is a flowchart illustrating a method of distinguishing a receiver in a wireless subscriber station according to the present invention.

<Explanation of symbols for the main parts of the drawings>

20: RF (Radio Frequency) section

22: MSM (Mobile Station Modem)

24: Voice ROM

28: SLIC part

Hereinafter, a preferred embodiment of a device for distinguishing a receiver and a method of a wireless subscriber network terminal according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic structural diagram of an apparatus for distinguishing a receiver in a wireless subscriber network terminal according to the present invention.

As shown, an RF unit 20 for processing a radio frequency (RF) signal transmitted and received between a wireless subscriber network (WLL) base station and a subscriber matching device, and a CPU for controlling a circuit are built in the RF unit 20. A guide message to be sent to the sender according to a command of the mobile station modem (22) and the mobile station modem (22) which performs digital / analog conversion functions for each line of the circuit. A voice ROM 24 to be stored, a codec unit 26 for converting a digital / analog signal output from the mobile station modem unit 22 to analog / digital, respectively, and an analog line A plurality of subscriber line interface circuit (SLIC) units 28 that perform a matching function and provide ring signals and various tone signals, and analog lines to the plurality of slick units 28. It consists of a number of general telephones 30 connected.

Here, the plurality of slicks 28 and the plurality of general telephones 30 are shown as two for convenience of description.

In the narrowband wireless subscriber network system configured as described above, the analog voice data input through the general telephone 30 is converted into digital voice data by the codec unit 26 through a line port (not shown) and a slick unit 28. In response to the control of the CPU embedded in the MSM unit 22, the RF unit 20 is transmitted to the base station. On the contrary, the voice data received through the antenna is the RF unit 20, the MSM unit 22, and the voice ROM. ROM) 24, the codec unit 26, and the slick unit 28 are received by the subscriber's normal telephone 30.

Hereinafter, a method of distinguishing a receiver from a terminal configured as described above will be described.

3 is a flowchart illustrating a method of distinguishing a receiver in a wireless subscriber station according to the present invention.

First, when the sender makes a call and attempts the forward link at the base station, the subscriber station receives the wireless subscriber network (S11).

Subsequently, upon receiving a call, a message stored in a voice ROM inside the terminal is sent to the sender (S13).

The message contained in the Voice ROM asks the user to select a receiving telephone. For example, "Press 1 for a call to A and press 2 for a call to B".

After the step S13, the sender who listens to the message transmitted from the voice ROM selects a desired number, and the DTMF receiver in the MSM of the terminal sends data about the number pressed by the sender to the CPU (S15). . Here, DTMF (Dual Tone Multi Frequency) is a signal generated when a button of a general telephone is pressed.

Subsequently, the CPU transmits ring data to the slick SLIC to which the telephone used by the person who requested the sender is transmitted as data transmitted from the DTMF receiver (S17).

Subsequently, the slick receiving the ring data rings the corresponding phone to ring only the selected phone (S19).

Subsequently, when the receiver receives a call because the ring rings, the codec unit and the telephone side slick of the receiver are connected to proceed with normal call mode (S21).

As a result, the present invention provides a separate slick for each telephone, in which multiple telephones are simultaneously connected to a single slick and all the telephones are ringing at the same time, so that the sender selects a receiver with a message stored in the voice ROM, and according to the sender's selection. The key is to send ring data to the slick, so that only certain phones will ring, as opposed to all phones ringing.

In the above-described wireless subscriber network terminal of the present invention, a device for distinguishing a receiver and a method thereof include a voice ROM including a voice ROM storing a guide message and a number of slicks equal to the number of telephones. Voice ROM allows the sender to select the recipient according to the message, and the terminal allows the corresponding slick to process the ring data, so that the user can directly talk to the desired person without going through another person, and also the wireless subscriber network It is effective to perform several operations with one terminal.

Claims (2)

A voice ROM storing a voice message for guiding the extension number of each recipient; An MSM unit for retrieving the extension number guide message of the receiver from the voice ROM and transmitting it to the transmitting side when the incoming ring arrives, and transmitting a ring signal only to the corresponding slick (SLIC) when an arbitrary extension number is selected from the transmitting side; And a slick unit having a plurality of slicks (SLIC) for connecting only the telephone lines by ringing only a selected telephone (receiver) according to the command of the MSM unit. Sending an extension number guide message stored in a voice ROM inside the terminal to the sender when the ring is received at the wireless subscriber network terminal; If the receiver number is selected by the sender, recognizing data for the number selected by the sender in a DTMF receiver in the MSM of the terminal; Transmitting ring data to a slick to which a telephone corresponding to the recognized recipient number is connected; Ringing the corresponding telephone in the slick receiving the ring data to ring only the selected telephone; And when the receiver is hooked off after the ring transmission, connecting the codec unit and the slick to form a call path.