KR20000066662A - Communication Operating Method in Communication System - Google Patents

Abstract

PURPOSE: A communication operation method in a communication system is provided so that an originator provide specific number or digit information by removing DTMF signal and digital signal corresponding to the information of number in a communication system based on the WLL system or the PCS/cellular CDMA system. CONSTITUTION: A CPU checks in a cycle of 5 msec whether a DTMF signal is inputted from a fixed terminal through a strobe terminal or an available terminal(ST1). The CPU discriminates whether there is a strobe signal in the strobe terminal(ST2). If there is the strobe signal, the CPU regards it as what the DTMF signal was inputted, and disconnects or switches off a voice path provided to a radio section between a radio interface unit and an exchange during a preset time(ST3). However, if there is no strobe signal in the strobe terminal, the CPU keeps the voice path as it is(ST4). In case that there is the strobe signal, the CPU confirms whether it is a DTMF signal having a length of more than 40 msec(ST5). If it is the DTMF signal having a length of more than 20 msec, the CPU sends the exchange a message that a DTMF signal has been generated(ST6).

Description

Communication operating method in communication system {Communication Operating Method in Communication System}

The present invention relates to a communication operation method of a communication system, and more particularly, to transmit busy number (or digit) information to a called party in a mobile communication system based on a WLL system or a PCS / Cellular Code Division Multiple Access (CDMA) scheme. The present invention relates to a communication operation method of a communication system that is suitably used.

In general, a wireless local loop (WLL) system is for wirelessly providing a subscriber line provided between a subscriber and a telephone station. Such a system can provide a voice communication service, a facsimile transmission service, and a data communication service when needed.

The WLL system combines radio frequency (RF) technology developed in the 1970s with semiconductor and wireless communication technology developed in the late 1980s, and solves problems such as frequency efficiency, wireless channel quality, and cost per subscriber. It began to be developed.

The advantage of the WLL system is that construction costs, time, and maintenance costs are reduced compared to the conventional wired network, and it is possible to provide various services such as excellent call quality, data, and ISDN. Therefore, it can be very useful for a new service provider who wants to secure a subscriber network early, or for a developing country in which wired network structure is poor.

The basic configuration of such a WLL system consists of a telephone and a network interface unit (NIU) that enables wireless communication with the telephone during the exchange. In addition, the WLL system is divided into a separate WLL system and an integrated WLL system according to a connection relationship between a telephone and a subscriber access device. A separate WLL system is a wired connection between a fixed telephone and a subscriber access unit so that a subscriber having a fixed telephone connected to the existing wired network can purchase only a subscriber access unit without purchasing a telephone when joining the WLL system. On the other hand, the integrated WLL system is composed of a single phone and a connecting device in hardware so that a subscriber who does not have a fixed telephone connected to the existing wired network can easily join the WLL system.

1 is a block diagram of a typical separate and integrated WLL system.

Referring to FIG. 1, a fixed telephone 10 installed in a home or an office, a subscriber access device 20 connected to a fixed phone 10 for transmitting and receiving information on a wireless interface, and an integrated telephone having a built-in subscriber access device ( 30, the base station 40 for wireless connection with the subscriber connection device 20 or the integrated telephone 30, the base station controller 50 for wired connection with the base station 40, and for the functions of call processing and message delivery; It consists of an operating device 60 for operating and maintaining the WLL system. Here, the switching center 70 is connected to the base station controller 50.

The operation of each component of the WLL system configured as described above will be described in detail as follows.

First, the subscriber access device 20 is located at the last stage of the WLL system and transmits / receives information on the air interface, and transmits a signal converted from radio frequency to baseband to the subscriber and its reverse process. Performs baseband signal processing, signal protocol processing with the communication network, and voice signal processing.

In addition, the base station 40 wirelessly connects to the subscriber access device 20 or the integrated terminal 30 to process radio frequency signals to perform modulation and demodulation, channel coding and decoding functions of the radio signals, and the base station controller 50. Is connected by wire through specific trunk (E1 / HDSL).

The base station controller 50 is located between the base station 40 and the exchange 70 to control and control a plurality of base stations, and to transmit signal messages, call processing functions, code conversion functions, and the base station 40 and the switching center 70. It performs the interface function between).

The operation device 60 is in charge of the operation and maintenance of the subscriber access device 20, the base station 40 and the base station controller 50, the network configuration management function, network element management function, performance management function, data processing function, software Perform administrative and security management functions.

The transmission and reception operations of the WLL system configured as described above will be described as follows.

First, in the transmission operation, the calling party subscriber enters the telephone number of the called party subscriber using the fixed telephone 10. Then, the subscriber access device 20 connected to the fixed telephone 10 receives the input telephone number, modulates it into a radio frequency signal, and transmits it to the base station 40 through the radio link period. At this time, the called party's telephone number is transmitted to the base station 40 by the subscriber access device 20 using en-bloc or functional address signaling or overlap or stimulus address signaling.

The batch transmission method stores the numerical information corresponding to the telephone number in the memory one after another and transfers the information representing the entire telephone number to the base station 40 at a time as a block concept. Whenever numeric information is inputted, it is transmitted to the base station 40.

Subsequently, the base station 40 receiving the radio frequency signal transmitted from the subscriber access device 20 or the integrated terminal 30 transmits the received signal to the switching center 70. The switching center 70 determines the communication path by determining whether the called party exists in its area or in the area of another switching station, and transmits signals and data for establishing the communication path to the called party. Since the following operation is a general operation, further description thereof will be omitted here, and since the operation upon reception of the WLL system is the reverse of the originating operation, it will be omitted here.

2 is an overall configuration diagram of a separate WLL system for explaining the operation of the conventional and the present invention.

Referring to Fig. 2, the call-side fixed telephone 100a and the called-side fixed telephone with the call and traffic path between the calling-side fixed telephone 100a and the called-side fixed telephone 100b or 100c set in the manner described above. Suppose you are on a call between (100b or 100c). In this case, when the user of the fixed telephone 100a communicates with an Automatic Response System (ARS) or a similar system in order to process a business such as a bank or a public office, it is necessary to press a number as necessary.

At this time, when a predetermined button of the fixed telephone 100a is pressed, a dual tone multi-frequency (DTMF) signal having a length corresponding to the time when the button is pressed is fixed telephone 100a as shown in FIG. 3A. Is transmitted from the subscriber access device 200. At this time, the central processing unit provided in the subscriber access device 200 is a dual tone effective as shown in Figure 3b, if the dual tone multi-frequency (DTMF) signal transmitted from the fixed telephone (100a) is generally more than 40 msec It is assumed that the multi-frequency (DTMF) signal is input, and transmits a message indicating that the dual-tone multi-frequency (DTMF) signal is input from the fixed telephone (100a) to the switch 400 through the base station 300. The switch 400 determines the communication path by determining whether the called party is in its area or in the area of the other switch 500, and determines the communication path, and the duplex tone multiple corresponding to the number input by the user of the fixed telephone 100a. The frequency DTMF signal is transmitted to the called stationary terminals 100b and 100c.

The reason for repeating the dual tone multi-frequency (DTMF) signal corresponding to the number selected by the calling station fixed telephone 100a in the switch 400 is that the traffic path formed between the user access device 200 and the base station 300 is wireless. This is because the transmission data is not completely transmitted because it is a section. That is, in the case of using the 13K QCELP vocoder under the condition that there is no noise in general, the data rate is 99% in the wireless section between the subscriber access device 200 and the base station 300, and less than 95 when the 8K QCELP vocoder is used. And about 50% when using an EVRC vocoder.

However, in the conventional separate WLL system, as shown in FIG. 3C, the dual tone multi-frequency (DTMF) signal S1 output from the fixed telephone 100a and the dual tone multi-frequency DTMF repeated at the switch 400 are shown. ) May be delivered to the destination fixed telephone 100b or 100c. If this problem occurs when looking at the banking business, the same numerical information will be provided twice so that the correct operation will not take place.

Therefore, in the current WLL system, a technology for transmitting numeric information during a call is not actively applied where it is important, such as a bank service business.

Also. This problem is equally applicable to an integrated WLL system in which a terminal and a base station are a wireless section instead of a wired section, or a mobile communication system based on a PCS / cellular code division multiple access scheme. However, the frequency signal corresponding to the number of the terminal is not a dual tone multi-frequency (DTMF) signal, but a digital signal is different.

An object of the present invention has been made in view of the above-mentioned problems of the prior art, and when the calling party presses a specific number during a call between the calling party and the called party, a duplex corresponding to the numeric information provided directly to the exchange at the calling party is called. Provides a communication operation method in a communication system for removing a tone multi-frequency (DTMF) signal or a digital signal and providing only the dual tone multi-frequency (DTMF) signal or digital signal corresponding to the numeric information selected by the calling party at the exchange. It is to.

According to an aspect of the present invention for achieving the above object, the communication operation method in the communication system to establish a call and traffic path between the calling terminal and the called terminal of the wireless local loop (WLL) system And checking whether a dual tone multi-frequency (DTMF) signal is input at a set period in a subscriber access device connected to the calling terminal, and setting the dual tone multi-frequency (DTMF) signal. If input, disconnect the voice path provided for the system exchange period with the calling terminal for a predetermined time, and transmits a message indicating that a dual tone multi-frequency (DTMF) signal has occurred to the exchange.

In addition, the method for operating a call in the communication system according to the present invention comprises the steps of establishing a call and traffic path between the calling terminal and the called terminal of a wireless local loop (WLL) system or a mobile communication network; Detecting whether digital information is input in the digital format, and when the numeric information signal is input, disconnects the voice path between the calling terminal and the wireless section provided during the system exchange period for a predetermined time. And transmitting a message indicating that a numeric information signal has occurred.

1 is a block diagram of a typical separate and integrated WLL system.

2 is an overall configuration diagram of a separate WLL system for explaining the operation of the prior art and the present invention.

3 is a timing diagram for explaining the operation of the WLL system shown in FIG.

4 is a flowchart illustrating a communication operation according to the present invention.

5 is an overall configuration diagram of a mobile communication system based on an integrated WLL system or a PCS / Cellular Code Division Multiple Access (CDMA) scheme for explaining another embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

100a-100d: Telephone 200: Subscriber Access Device

300: base station 400,500: exchanger

Hereinafter, the configuration and operation according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In Fig. 2, the calling party fixed telephone 100a establishes a call and traffic path between the called party fixed telephone 100b or 100c through the subscriber access device 200, the base station 300, and the switching center 400 in turn. Therefore, a call can be made between the calling stationary fixed telephone 100a and the called party fixed telephone 100b or 100c.

At this time, a user of the fixed telephone 100a may input a specific number in order to respond to the answering machine. If a button indicating a specific number of the fixed telephone 100a is pressed, a dual tone multi-frequency (DTMF) signal as shown in FIG. 3A is applied to the subscriber access device 200. At this time, the subscriber access device 200 is provided with a dual-tone multi-frequency (DTMF) signal detection device, if any signal from the fixed telephone (100a) is applied to the dual-tone multi-frequency (DTMF) signal detection device is shown in Figure 3b As shown, when a signal having a predetermined length (40 msec or more) is applied from the strobe terminal for outputting a high level strobe signal and the fixed telephone 100a, a high level valid signal is generated. An effective terminal for outputting is provided.

Accordingly, the central control device provided in the subscriber access device 200 determines whether a dual tone multi-frequency (DTMF) signal is input from the fixed terminal 100a through the strobe terminal and the effective terminal within 20 msec. The test is performed in cycle units (5 msec in the present invention) (ST1). That is, the central processing unit of the subscriber access unit 200 checks the strobe terminal of the dual tone multi-frequency (DTMF) signal detection device in 5 msec units.

At this time, the central processing unit determines whether there is a strobe signal at the strobe terminal (ST2), and if there is a strobe signal, a dual tone multi-frequency (DTMF) signal is regarded as input between the subscriber access device 200 and the switch 400. The voice path provided to the radio section is disconnected or switched off for a predetermined time (determined in 1-5 msec in the present invention) (ST3). Here, the reason for disconnecting the voice path or reducing the output frequency for 1-5 msec is because it is determined that cutting the signal of about 5 msec does not significantly affect the call quality. However, when the strobe signal is present at the strobe terminal, the central processing unit of the subscriber access device 200 maintains the transmission voice path provided between the subscriber access device 200 and the switch 400 (ST4).

Subsequently, when the strobe signal is present at the strobe terminal of the dual tone multi-frequency (DTMF) signal detecting device, the central processing unit of the subscriber access device 200 determines whether the dual tone multi-frequency (DTMF) signal has a length of 40 msec or more. (ST5).

In this case, when the determination result is a dual tone multi-frequency (DTMF) signal having a length of 40 msec or more, the central processing unit of the subscriber station transmits a message indicating that the dual tone multi-frequency (DTMF) signal has occurred to the exchange 400. (ST6)

When the central processing unit of the exchange 400 receives the message, the central processing unit transmits a frequency signal corresponding to the dual tone multi-frequency (DTMF) signal input from the fixed terminal 100a stored in its memory to the called party 100b or 100c. send.

Therefore, when a certain number button is pressed on the calling party fixed telephone 100a in a call state, only one numeric information is necessarily transmitted to the called party fixed telephone 100b or 100c.

5 is an overall configuration diagram of a mobile communication system based on an integrated WLL system or a PCS / cellular code division multiple access (CDMA) scheme for explaining another embodiment of the present invention.

FIG. 5 differs from FIG. 2 only in that the mobile terminal 100d is an integrated terminal or a PCS / cellular terminal for the WLL system instead of the fixed telephone and the subscriber access device. In the present invention, an integrated terminal or a PCS / cellular terminal will be defined and described as a mobile terminal.

In FIG. 5, the mobile terminal 100d establishes a call and traffic path between the called stationary fixed telephone 100b or 100c through the base station 300 and the switching center 400 in turn. Therefore, a call can be made between the mobile terminal 100d and the called stationary fixed telephone 100b or 100c.

At this time, a user of the mobile terminal 100d may input a specific number in order to respond to the answering machine. If a button indicating a specific number of the mobile terminal 100d is pressed, the central processing unit provided in the mobile terminal 100d detects this through a digital signal processing procedure. The central processing unit provided in the mobile terminal 100d detects this and transmits a message indicating that the user of the mobile terminal 100d has pressed a button indicating a specific number to the switch 400 through the base station 300. At the same time, the central processing unit provided in the mobile terminal 100d sets a time for setting a voice path provided in a wireless section between the mobile terminal 100d and the exchange 400 (in the present invention, determined from 1-5 msec) Disconnect or switch off (ST3). Here, the reason for disconnecting the voice path or reducing the output frequency for 1-5 msec is because it is determined that cutting the signal of about 5 msec does not significantly affect the call quality.

When the central processing unit of the switch 400 receives the message, the central processing unit transmits a frequency signal corresponding to the specific button selection signal input from the mobile terminal 100d stored in the memory to the called party fixed telephone 100b or 100c.

Therefore, when a specific number button is pressed on the calling mobile terminal 100d in a call state, only one numeric information is necessarily transmitted to the called party fixed telephone 100b or 100c.

According to the present invention as described above, when a specific number button must be pressed, such as an automatic answering system during a call between a calling party and a called party in a separate or integrated WLL system or a PCS / cellular code division multiple access mobile communication system. Since only one numeric information is transmitted to the called terminal, it is possible to operate the answering machine very accurately.

Claims (7)

Setting up a call and traffic path between a calling terminal and a called terminal of a wireless local loop (WLL) system; Checking whether a dual tone multi-frequency (DTMF) signal is input at a set period in a subscriber access device connected to the calling terminal; When the dual tone multi-frequency (DTMF) signal is input, the voice path provided during the system exchange period with the calling terminal is disconnected for a predetermined time, and a message indicating that the dual tone multi-frequency (DTMF) signal is generated is transmitted to the exchange. Call operation method in a communication system, characterized in that consisting of the step of transmitting. The method of claim 1, wherein the subscriber access device checks whether a dual tone multi-frequency (DTMF) signal is input at a predetermined cycle within 20 msec. The communication system according to claim 1, wherein the test checks whether a strobe signal is present within the set period in a dual tone multi-frequency signal detection device provided in the subscriber access device. Way. The method of claim 1, wherein the time for disconnecting the voice path is determined within 20 msec. 2. The method of claim 1, wherein when the exchange receives the message, transmitting a frequency signal corresponding to a dual tone multi-frequency (DTMF) signal input from the calling terminal to the called terminal. How to operate a call in a communication system. Establishing a call and traffic path between a calling terminal and a called terminal of a wireless local loop (WLL) system or a mobile communication network; Detecting whether numeric information is input at the calling terminal; When the numeric information signal is input, disconnecting the voice path between the calling terminal and the radio section provided during the system exchange period for a predetermined time, and transmitting a message indicating that the numeric information signal has occurred to the exchange. Call operation method in a communication system characterized in that. 7. The communication operation of claim 6, wherein the exchange further includes transmitting a frequency signal corresponding to the numeric information input from the calling terminal to the called terminal when receiving the message. Way.