KR20020071536A - Method for transmitting phone number in WLL system - Google Patents

Abstract

The present invention relates to a method for transmitting a telephone number of a wireless subscriber network terminal, which enables the telephone number to be transmitted by pressing the last digit of the outgoing telephone number for a predetermined time when attempting a call using a general telephone connected to the wireless subscriber network terminal. The present invention relates to waiting for a user's telephone number input, and when the user inputs a telephone number, stores it in a memory provided in the terminal and checks whether the input telephone button is pressed for a predetermined time or more. As a result, when the user presses the telephone button for more than a predetermined time, the telephone number stored in the memory is transmitted to the base station after determining that the telephone number has been inputted, thereby reducing the complexity of the telephone number transmission software and at the same time, a general telephone connected to the WLL terminal. Phone number without having to send Have a call sent.

Description

Method of transmitting phone number of wireless subscriber network terminal {Method for transmitting phone number in WLL system}

The present invention relates to a wireless subscriber network terminal, and more particularly, when a telephone call is made using a general telephone connected to a WLL terminal, the telephone number can be transmitted by pressing the last digit of the transmission telephone number for a predetermined time. A phone number transmission method of a wireless subscriber network terminal.

In general, a wireless local loop (WLL) system is a technology for providing a subscriber line wirelessly, unlike a conventional wired subscriber network connecting a switch and an individual general subscriber through a wired subscriber line. For example, the development of RF technology and the development of semiconductor and wireless communication technology in the late 1980s began to develop in earnest as the previous problems such as frequency efficiency, wireless channel quality, and cost per subscriber were solved. In addition, WLL is easier to establish 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 has a new subscriber network early in the network, can quickly establish a new subscriber even in urban areas, especially in the developing communication infrastructure of developing countries where the wired network structure is weak. Products developed for WLL include satellite system, fixed microwave system, cellular technology system, and cordless system system. It is used.

The system employing the cellular technology includes three multiple access schemes, namely, Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), and Code Division Multiple Access (TDMA). Code Division Multiple Access (CDMA) is used. Commercially available products, FDMA and TDMA are the mainstream, but subscribers have been converted 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 there is an advantage that radio wave environment of WLL network is much better than radio environment of mobile communication network because there is no mobility. It has 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. Therefore, it becomes the non-line-of-sight environment, which blocks the linear waves by the surrounding buildings. 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 a building, so the line-of-sight environment is secured so that the radio wave path loss is 20dB / decade. It can be as small as a decade and serve a larger area with the same transmit power.

Second, since the radio wave environment of the WLL network is point-to-point fixed communication, fading due to multipath is much less than that of the point-to-point mobile communication network. The Eb / No required in the mobile communication environment using a channel bandwidth of 30 kHz requires only about 14 dB, which makes it possible to implement a low power transmitter.

Third, since the WLL network is fixed wireless communication, no handoff occurs. Therefore, it is not necessary to secure an extra handoff radio channel required for communication service without disconnection in the mobile communication network, and it is not necessary in the WLL network, and this extra radio channel can be used for general call use, increasing the efficiency of the radio channel and accommodating subscribers. The effect of increasing the dose 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, and since the wireless link is unchanged unless the subscriber increases too much or divides cells after being installed, the WLL network Is much simpler than a mobile network.

Fourth, since it is a fixed wireless communication of the WLL network, the use of directional antennas on the forward and reverse links can reduce the influence of interference due to the same channel on individual subscribers, 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, that is, the WLL system, is a subscriber access device, which is composed of a terminal located in a subscriber's home, a base station for converting a radio signal received from the detachable terminal into a wired signal, and a switch for connecting a transmitting side to a receiving side. The terminal of the wireless subscriber network system is connected to a general telephone, a facsimile, or a personal computer that 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), both of which use a CDMA scheme. In particular, the narrowband wireless subscriber network system is only mobile in the system applied to mobile communication technology since the mid-1990s due to the decrease in the price of system and terminal due to the rapid development of mobile communication technology and the increase in telephone demand of developing countries with low telephone penetration rate. Except for Bay, it was developed as a "Fixed Subscriber" and was developed to serve 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, it is possible to provide a level of service equivalent to existing wireline quality, and is more fixed than conventional mobile communication. As subscribers are accommodated, subscriber capacity is also increasing.

In the narrowband wireless subscriber network system, especially, a terminal type WLL terminal which can be used only by connecting a home general telephone, analog voice data inputted through a general telephone is passed through a line port and a subscriber line interface circuit (SLIC). The codec is converted into digital voice data and transmitted to the base station via the RF unit under the control of the MSM. On the contrary, the voice data received through the antenna is passed through the RF unit, the MSM unit, the codec, and the slick. It is sent to a regular telephone.

Here, there is a certain rule in the process of the user inputting a telephone number through a general telephone and transmitting it to the base station. For example, if the user enters 1 first, the system recognizes emergency numbers such as 112, 113, and 119 and sends out the number after 3 digits.If the user attempts to make a local call, the user inputs a predetermined number. After a certain time, it is automatically sent to the base station.

However, as described above, after the predetermined number of numbers is input, the automatic transmission to the base station requires that a certain time elapses after the completion of the input. There is also a problem that must wait a certain time each time.

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 reduce the complexity of the telephone number transmission software by pressing the last digit of the transmission telephone number for a certain time when attempting a call using a general telephone connected to the WLL terminal to reduce the complexity of the telephone number transmission software, The present invention provides a method for transmitting a telephone number of a wireless subscriber network terminal, which enables a telephone number to be transmitted without having a transmission button on a general telephone connected to the terminal.

Features of the telephone number transmission method of the present invention wireless subscriber network terminal for achieving the above object,

Waiting for input of a user's telephone number in an off-hook state and storing the user's input of the telephone number in a memory provided in the terminal;

It is determined whether the button corresponding to the input telephone number is pressed for a predetermined time or more, and as a result, when the button corresponding to the input telephone number is not pressed for a predetermined time or more, it is determined that the telephone number input is not finished and the rest Waiting for input of a telephone number;

As a result of the determination, if the telephone number button is pressed for a predetermined time or more, it is determined that the input of the telephone number is terminated, and then transmitting the telephone number stored in the memory to the base station.

1 is a block diagram of a wireless subscriber network terminal to which the present invention is applied,

2 is a flowchart showing a phone number transmission method of a wireless subscriber network terminal according to the present invention.

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

10: regular telephone

20: WLL terminal

21: SLIC

22: DTMF Receiver

23: MSM

Hereinafter, an embodiment of the telephone number transmission method of the present invention wireless subscriber network terminal will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a wireless subscriber network terminal to which the present invention is applied.

As shown, it is composed of a terminal type WLL terminal 20 and a regular telephone 10, which supplies power to the regular telephone 10 and the state of the telephone (on hook or off hook). SLIC (21) for transmitting a voice signal to the MSM and connecting the voice signal with the general telephone 10, and analyzes the signal detected when the telephone button of the telephone (10) connected to the slick is pressed and the digital signal A dual tone multi frequency (DTMF) receiver 22 which is converted to the MSM 23 and transmitted to the MSM 23, and is connected to the DTMF receiver 22. MSM (Mobile Station Modem) 23 performing the analog conversion function.

Referring to the telephone number transmission operation according to the present invention in the configuration of the WLL terminal as follows.

When the user lifts the handset of the ordinary telephone 10 for transmission, the WLL terminal 20 detects an off-hook state and supplies power to a dual tone multi frequency (DTMF) receiver 22 for phone number recognition.

The DTMF receiver 22 converts a telephone number input by a user, that is, a DTMF signal, into digital data, and transmits it to the MSM 23. The MSM 23 stores the input telephone number in an internal memory.

According to the present invention, if the user continuously presses the last digit for a predetermined time when the user presses the telephone number, the WLL terminal determines that all of the telephone numbers have been entered. The operation principle is that if the user presses the number in the general telephone, the DTMF signal is continuously generated as long as the user presses the number. Will be.

Therefore, when the user presses the telephone number button for a predetermined time and determines the MSM 23, the WLL terminal 20 regards the last number of the telephone number and transmits the input telephone number stored in the memory to the base station. Will be.

2 is a flowchart showing a phone number transmission method of a wireless subscriber network terminal according to the present invention.

First, in the off-hook state, that is, while the receiver is lifted, the wireless subscriber network terminal waits for the user's telephone number input and stores the user's telephone number in a memory provided in the terminal (S11).

It is determined whether the button corresponding to the input telephone number is pressed for a predetermined time or longer (S13).

As a result of the determination in step S13, when the button corresponding to the input telephone number is not pressed for a predetermined time or more, it is determined that the telephone number input is not finished and returns to step S11 to wait for input of the remaining telephone number.

As a result of the determination in step S13, when the telephone number button is pressed for a predetermined time or more, it is determined that the telephone number input ends, and then the telephone number stored in the memory is transmitted to the base station (S17).

The telephone number transmission method of the wireless subscriber network terminal according to the present invention as described above can reduce the complexity of the telephone number transmission software and can transmit a telephone number without having a transmission button on a general telephone connected to the WLL terminal. It works.

Claims (2)

In the method of transmitting a telephone number of a wireless subscriber network terminal, Waiting for input of a user's telephone number in an off-hook state and storing the user's input of the telephone number in a memory provided in the terminal; Determining whether a button corresponding to the input telephone number is pressed for a predetermined time or more; And determining that the telephone number input is terminated when the telephone number button is pressed for a predetermined time, and transmitting the telephone number stored in the memory to the base station. The method of claim 1, As a result of checking whether the button corresponding to the input telephone number is pressed for a predetermined time or more, if the button corresponding to the input telephone number is not pressed for a predetermined time or more, it is determined that the telephone number input is not finished and the remaining telephone The method of transmitting a telephone number of a wireless subscriber network terminal, characterized by further comprising the step of waiting for input of a number.