KR100274092B1 - Method for transferring caller information and exchange system having transfer function of caller information - Google Patents

Abstract

The present invention is an apparatus and method for transmitting information of a calling party by using a frequency shift modulation method which is efficient among the techniques of modulating digital data into analog data of a calling subscriber calling a general analog telephone subscriber in a general communication network. It is about.

The present invention is to send a variety of information of the calling subscriber to the called party terminal when there is a call request. In the all-electronic auto switch of the present invention, when there is a call request from the calling subscriber, the time switch is controlled to set a channel for transmitting the frequency shift modulation signal, and the calling subscriber information when the terminal of the called subscriber is not busy. To convert the signal into a frequency shift modulated signal and transmit it to the called subscriber through the channel. When the called party's terminal is in a call state, the receiver receives the DMP start code from the called party's terminal, and transmits the changed subscriber subscriber information.

Description

Electronic switchboard with calling party information transmission function and sending method of calling party information

The present invention relates to an electronic switch system and a subscriber information transmission method having a calling party information transmission function. In particular, the present invention transmits information of a calling subscriber to a called subscriber by using frequency shift keying. An electronic switch system and a subscriber information transmission method thereof.

Conventional all-electronic auto-switches were not provided with a service for displaying the calling party information to the general analog called party when the calling subscriber calls to the called party. However, for the function of displaying the calling party information to the general analog subscriber as well as the digital subscriber, a telephone having a telephone number display function must be prepared on the called party's side and at the same time, such a service must be supported by the electronic switching center. Conventionally, in order to display the calling party information when a call is made to the called party's telephone, the calling party information is transmitted to the called party by using DTMF (Dual Tone Multi-Frequency) signal. The majority of telephones used by ordinary analog subscribers are push-button telephones. The twelve DFM signals used here are complex frequency components that are transmitted as analog signals between the telephone and the switch. In FIG. 1, an apparatus for transmitting caller information using a DFM signal in the all-electronic auto exchange is shown.

Referring to FIG. 1, a typical exchanger has a time switch 110 for exchanging two timeslots on the same data sequence, and a space switch 120 for exchanging two timeslots on another data sequence. The time switch 110 mainly consists of a memory, and the space switch 120 is constituted by a logic gate circuit. The time switch 110 generally has a separate network configuration having a transmitting end 112 for sending various tone signals and voice signals to the outside of the exchange and a receiving end 114 for sending to the subscriber inside the exchange. In case of having a separate network configuration, an intra Junctor 116 is required. The intra jitter 116 represents a return path connecting the transmitting end 112 and the receiving end 114 in the time switch 110. The subscriber line matching device 130 is connected to the time switch 110 and the control unit 160 to perform the function of the exchange to match the subscriber line. The DMP receiver 140 is connected to the receiving end 114 of the time switch 110 and performs a function of receiving a DFM signal transmitted from the calling subscriber, and the DFM transmitter 142 is the time switch. It is connected to the receiving end 114 of 110 to perform the function of transmitting the information of the calling subscriber to the recipient subscriber to the DMP signal. The tone signal generator 150 is connected to the time switch 110 and performs a function of generating various tone signals such as a transmission tone, a ring tone, a ring back tone, and a busy tone. The control unit 160 is the time switch 110, space switch 120, subscriber line matching device 130, DFM receiver 160, DMF transmitter 142, tone generator 150 and other It is connected to the device to control all the exchange procedures by the program, and to perform various functions such as control of the internal management of the exchange. The called subscriber 170 is a subscriber having a terminal capable of receiving a DFM signal.

Referring to Figure 1, the operation of the exchange performing a conventional caller information display function, when the calling party calls the called party through the exchange, the recipient telephone number transmitted from the calling party (not shown) The demultiplexer signal is received by the demultiplexer 140 through the receiving end 114 of the time switch 110. The controller 160 notified that there is an outgoing signal from the calling party acquires the calling party information by searching the subscriber database stored in the memory 162. In addition, the controller 160 translates the DFM signal received through the DFM receiver 140 to find the corresponding subscriber line of the called subscriber and makes a line connection. If the line is already in use (calling), a busy tone is sent to the calling party, but if the called party is not busy (calling), a ringback tone is sent to the calling party, and when the line connection is completed, the controller 160 The TFM transmitter 142 controls the sender subscriber information obtained by searching the database and transmits the ring signal after receiving the calling subscriber information through the receiving end 114 of the time switch 110. After that, the DMP transmitter 142 is controlled to transmit the caller information to the called subscriber in the idle period of the ring signal. At this time, the data transmission format for transmitting the subscriber information is disclosed in FIG.

2 is a transmission form of subscriber information transmitted through an operation of an exchange performing a conventional subscriber information display function as described above. When transmitting each digit 220 after the DMP start code 210 is transmitted, a PAUSE 230 signal is transmitted between the digits. Finally, the DMP stop code 240 is transmitted, and the first ring signal 250 is transmitted with a predetermined time interval 230 after transmitting the DMP stop code 240.

However, in such a conventional switch structure, since only the function of the DTP receiver receiving the DTP signal generated when the calling subscriber presses the telephone number is in charge of the receiver, the receiver is required to transmit the subscriber information to the called subscriber. A separate DMP transmitter 142 was required in the exchange for transmitting the DFM signal to the subscriber's telephone. In addition, in the conventional switch structure having a structure in which the DMP receiver 140 and the DTP transmitter 142 are connected to the rear end of the time switch 110, the receiver 114 and the intra jitter 116 are transmitted when the subscriber information is transmitted to the outside. ) Is transmitted to the called subscriber by using the DFM signal. As a result, when providing a service that transmits a DFM signal to an external subscriber of a switch, it is limited by the number of Intra Junctor channels in front of a time switch, and thus, a general analog subscriber, not an ISD subscriber. There are constraints on improving the acceptability of additional services in the future.

In addition, since the conventional exchange has only 12 kinds of information that can be transmitted through DTF signals, such as 1 ~ 9, 0, *, #, etc. according to DTF, international dialing is possible. The service was very simple because only subscriber information could be sent to the called party. That is, only the telephone number of the calling subscriber was displayed in the telephone having the telephone number display function of the called party.

In the conventional subscriber information transmission format, since the exchange performs time control for each digit 220 in the control unit in order to transmit DFM digital information to the called party's telephone, a heavy load is placed on the control unit of the exchange. The water solubility of was limited. In addition, since the digit 220 transmits about 140ms, it takes 1.5 ~ 2 seconds to transmit 10 digits of information for displaying general subscriber information. Therefore, the subscriber information display function is simultaneously provided to a large number of recipients. In order to secure more DTP resources and high exchange load, it must be considered, which causes a lot of changes in the structure of the exchange.

Accordingly, an object of the present invention is to transmit a subscriber electronic information and a subscriber information transmission function to display a variety of information in addition to the subscriber telephone number to more recipients by using the frequency shift modulation method for displaying the subscriber information display function. In providing a method.

It is another object of the present invention to overcome the limitations of subscriber acceptability and service signaling channels, and to improve the additional service availability in general public switched electronic switchboards. In providing.

It is another object of the present invention to transmit the subscriber subscriber information by using the frequency shift modulation method, the electronic subscriber exchange and the subscriber subscriber information transmission method having a sender subscriber information transmission function that can greatly reduce the transmission time of the subscriber subscriber information. In providing.

In the all-electronic exchange of the present invention for achieving the above object, a frequency shift modulation transmitter is provided at the front end of the time switch so that various kinds of sender information is transmitted in a frequency shift modulation method, so that the frequency shift of the subscriber subscriber information is performed. The modulated signal is transmitted to be displayed on the called party's terminal.

1 is a configuration diagram of a exchange performing a conventional calling party information display function

2 is a conventional sender information transmission format diagram

3 is a configuration diagram of an exchange according to an embodiment of the present invention

4 is a block diagram of a frequency shift modulated signal transmitter according to an exemplary embodiment of the present invention.

5 is a frequency shift modulation signal transmission format according to an embodiment of the present invention

6 is a flowchart illustrating a method of transmitting subscriber information according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

3 is a configuration diagram of an exchanger according to an embodiment of the present invention.

Referring to FIG. 3, the exchange of the present invention has a time switch 310 for exchanging two timeslots on the same data sequence, and a space switch 320 for exchanging two timeslots on another data sequence. The time switch 310 is mainly composed of a memory, and the space switch 320 is constituted by a logic gate circuit. The time switch 310 generally has a separation network configuration having a transmitting end 312 for sending various communication calls and voice signals to the outside of the exchange and a receiving end 314 for sending to the subscriber inside the exchange. If you have a separate network configuration, an intra-junction 316 is required. The intra jitter 316 represents a return path connecting the transmitting end 312 and the receiving end 314 in the time switch 310. The subscriber line matching device 330 is connected to the time switch 310 and the control unit 360 to perform a function of matching the subscriber line with the exchange. The DFM receiver 340 is connected to the receiving end 314 of the time switch 310 and performs a function of receiving a DFM signal transmitted from the calling subscriber. The frequency shift modulated signal transmitter 342 is connected to the front end of the receiving end 314 of the time switch 310 to convert the subscriber information into a frequency shift modulated signal and transmit the received subscriber subscriber information. The tone signal generator 350 is connected to the time switch 310 and performs a function of generating various tone signals such as a transmission tone, a ring tone, a ring back tone, and a busy tone. The control unit 360 is the time switch 310, the space switch 320, the subscriber line matching device 330, the DFM receiver 340, the DMF transmitter 342, the tone generator 350 and others It is connected to the device to control all exchange procedures by the program, and to perform various functions such as control of the internal management of the exchange. In the memory 362, various information such as a telephone number, a name, affiliation, and an address of a calling subscriber transmitted to a called party is stored in advance in the form of a database. The called subscriber 370 should be provided with a terminal capable of receiving the frequency shift modulated sender information according to the present invention, and the terminal should be provided with a demodulation device and a display device for the frequency shift modulated signal.

Referring to Figure 3, in the present invention, the time switch 310 is to ensure a sufficient channel in the form of a loop consisting of the intra jitter 316 when transmitting a signal to the incoming subscriber side telephone. The frequency shift modulated signal transmitter 342 converts the sender information stored in the memory 362 into a frequency shift modulated signal at any time under the control of the controller 360 and transmits the converted subscriber subscriber information to the called subscriber 370. Data input / output between the control unit 360 of the exchange and the frequency shift modulation signal transmitter 342 is based on a first in first out (FIFO) method. In addition, by connecting the frequency shift modulation signal transmitter 342 to the front end of the time switch 310, the subscriber received at the main exchanger is connected to the receiving end 114 of the time switch 310, the subscriber received at the other exchange the time switch ( In order to be connected to the transmitting end 312 of 310, it was possible to sufficiently overcome the channel capacity shortage occurring when the intra jitter 316 is provided at the front end of the conventional time switch 310. In FIG. 3, if the called party 370 is a subscriber information service subscriber who can receive the calling party information, this information is received from the exchange and various information such as the telephone number, name, affiliation, and address of the calling party when the call is received. Is indicated by receiving the frequency shift modulated subscriber information.

4 is a detailed block diagram of the frequency shift modulated signal transmitter 342 in FIG. 3.

The structure of the frequency shift modulated signal transmitter 342 includes an interface device 410 connected to the controller 360, a microprocessor 420 connected to the interface device 410, and a transmitter 430 connected to the microprocessor 420. And a test and alarm detection device 440 connected to the interface device 410, the microprocessor 420, and the transmission device 430. The transmitting device 430 includes a memory for storing information of the calling subscriber received from the control unit 360 and a digital signal processor for changing the frequency shift. The test and alarm detection device 440 detects a test and an alarm signal for checking an error in the frequency shift modulation signal transmitter 342.

Referring to FIG. 4, the operation of the frequency shift modulated signal transmitter 3420 of the present invention will be described. The interface apparatus 410 performs input / output of various signals between the control unit 360 and the frequency shift modulated signal transmitter 342 of the exchange. The microprocessor 420 performs a basic function for signal service of the frequency shift modulated signal transmitter 342 and a test and maintenance function for maintenance and management. Upon request of the calling party information element, the built-in digital signal processor controller modulates and transmits the calling party information transmitted from the control unit 360 to a frequency shift modulated signal. The transmitter 342 performs a function of detecting a test and an alarm signal for checking an error.

5 is a data transmission format diagram for transmitting the frequency shift modulated subscriber information according to an embodiment of the present invention.

The frequency shift modulated signal of the subscriber information is transmitted at predetermined time intervals with each ring signal in the rest period between the original ring signal and the secondary ring signal. The frequency shifting modulation signal of the subscriber information includes channel occupancy signal 510, display signal 512, message type signal 514, message length signal 516, and display according to the transmission order. And a hierarchical message 518 and an error sum signal (Check Sum) 520. The Presentation Layer Message is a standard that defines what kind of message is transmitted between the actual subscriber and the subscriber. It consists of several parameters in one data transmission. Each parameter is a parameter type signal. 522, a parameter magnitude signal (Parameter Lenth) 524, and a parameter octet signal (Prameter Data Octec). The parameter octet signal 526 may include physical bits such as a start bit 530, a data bit 532, a dummy bit 534, and a stop bit 536. It is organized in a hierarchy.

In the message transmission format as described above, the channel occupancy signal 510 has a size of 300 bits and is used only when data is transmitted in a hookoff state. The display signal 512 is composed of one block of 180 bits (on-hook state) and 80 bits (off-hook state) of mark bit 1. The message type signal 514 may define a message of 256 different characteristics between 00 and FF with a size of one octet. For example, in ETSI, if the message type expressed in hexacode is 04H, the calling party's telephone number is set to 04H, call setup is set to 80H, message waiting indicator to 82H, and billing information to 86H. The message length signal 516 is a binary code having a size of one octet and indicates the octet number of the data transmission format for transmitting the subscriber information. The display layer message 518 has actual information such as a telephone number, name, affiliation, address, and the like of the calling party. The error sum signal 520 is a value obtained by complementing 2 to the remainder of the sum of all octets from the message type signal except the error sum value to the end of the message divided by 256, and checking for an error.

For each parameter of the display layer message 518, the parameter type signal 522 is a signal defining 256 different messages between 00 and FF. For example, the ETSI standard defines 01H as the date and time, 02H as the calling number, 03H as the called number, and 07H as the calling party's name. The parameter magnitude signal 524 represents the number of parameter words. The parameter data octet signal 526 is the data content actually transmitted.

Each parameter data octet consists of 10 bits, each having a start bit 530 of 1 bit, a data bit 532 of 7 bits, a dummy bit 534 of 1 bit, and a stop bit 536 of 1 bit. . Each bit can be expressed by dividing it with 0 when the frequency shift modulated signal is about 2200 Hz and by 1 when about 1200 Hz. The data bit 532 may represent 128 bits by allocating 7 bits. Therefore, since 128 types of information can be transmitted compared to the 12 kinds of DTF information, various information such as numbers, English letters or special symbols can be represented.

In the normal case, the terminal communicates with the modem. Since the speed adopted by the terminal for international standards is 600 / 1200Baud, the digit transmission rate is also much faster than that of the conventional DMP method.

6 is a flowchart illustrating a method of displaying subscriber information by an exchange of the present invention.

3 to 6, the operation of the preferred embodiment of the present invention will be described.

First, the subscriber information display function may be implemented when the terminal of the called party is on hook or off hook. In order to implement the calling party information display function in the off-hook state, it is assumed that the called subscriber is a call waiting service subscriber.

In step 608, the controller 360 detects that there is a call request from the calling subscriber, and when it detects a call request, the controller 360 proceeds to step 610. In step 610, the control unit 360 is notified of the called number by connecting the channel of the time switch 310. Then, in step 612, the control unit 360 checks the incoming subscriber's database to determine whether the subscriber information display service subscriber is in step 614. In this case, if the subscriber is not the subscriber information display service subscriber, the process is the same as the general call processing procedure in step 616. However, it is a matter of course that the present invention can be implemented without performing the step of checking whether the subscriber subscriber's information display service subscriber in step 614 by checking the database of the called party.

In step 618, if the caller information service subscriber is a subscriber, the controller 360 determines the state of the terminal of the called subscriber and determines whether the called subscriber is busy. As a result of the determination, if the incoming subscriber is busy, the process proceeds to step 622, and the control unit 360 determines whether the subscriber is the call waiting service. If it is determined that the subscriber is not a call waiting service subscriber, the process proceeds to step 616, and if it is determined that the subscriber is the call waiting service subscriber, the controller 360 controls the time switch 310 to receive the receiver 314. Will require a tone connection through the channel. Then, the tone generator 350 and the receiving end 314 of the time switch 310 is connected. In this case, in step 626, the controller 360 controls the tone generating apparatus 350 to transmit the call waiting tone to the called party. Then, in step 628, the control unit 360 requests the DMP connection to the channel of the receiving end 314 of the time switch 310, connects the DFM receiver 340 to the time switch 314, and proceeds to step 630. do. In step 630, the control unit 360 determines whether the DMP start code is received from the terminal of the called party through the DMP receiver 340, and terminates the operation if the DMP start code is not received. If the start code is received, the process proceeds to step 632. In step 632, the controller 360 controls the time switch 312 to secure a channel for transmitting the frequency shifted subscriber subscriber information. That is, the frequency shift modulated signal transmitter 342 is connected to the receiver 314 of the time switch 310. Thereafter, in step 634, the controller 360 requests data transmission for generating the sender information of the frequency shift modulated signal transmitter 342, and proceeds to step 636. In step 636, the control unit 360 sends the calling party information stored in the memory 362 to the frequency shift signal changing unit 342 and modulates the frequency shift modulating signal transmitter 342 into a frequency shift modulated signal to the called party. Send caller information. The frequency shift modulated signal of the subscriber information is transmitted by the transmission format shown in FIG. In step 638, the incoming subscriber selects the selected function. For example, if the called party selects the call function, terminate the existing call, restore the call path, select a new call with the calling party, and if the called party selects the hold function, hold music to the calling party. It performs functions such as sending a message.

If the incoming subscriber is not busy at step 620, the process proceeds to step 640, and the control unit 360 controls the tone generator 350 to transmit the first ring signal to the called party's terminal, and then proceeds to step 642. . In step 642, the controller 360 controls the time switch 312 to secure a channel for transmitting the frequency shifted subscriber subscriber information. That is, the frequency shift modulated signal transmitter 342 is connected to the receiver 314 of the time switch 310. Then, in step 644, the controller 360 requests data transmission for generating the sender information of the frequency shift modulated signal transmitter 342, and proceeds to step 646. In step 646, the control unit 360 transmits the subscriber information stored in the memory 362 to the frequency shift signal changer 342, modulates the frequency shift modulated signal transmitter 342 into a frequency shift modulated signal, and sends it to the called party. Transmit subscriber information and proceed to step 648. In step 648, the secondary ring signal is transmitted to the called subscriber. The subsequent process in step 648 is the same as the process of transmitting a ring signal in a general exchange procedure.

In an embodiment of the present invention, the calling party information is transmitted between the ring signal and the ring signal, but as another embodiment of the present invention, when the called party is not busy, the first ring signal is transmitted to the called party's terminal. Sender information can be sent before That is, when the call is not in step 620, the process proceeds to step 642 to request a channel for transmitting a frequency shift modulated signal to the receiving end 314 channel of the time switch 310 to transmit the frequency shifted calling party subscriber information. Secure the channel. In operation 634, the frequency shift modulation signal transmitter 342 may request notification of the subscriber information and transmission of the subscriber information. Thereafter, in step 646, the frequency shift modulated signal transmitter 342 modulates the sender information stored in the memory 362 by the frequency shift modulated signal at the request of the controller 360, and transmits the sender subscriber information to the called party. In step 640, the first ring signal may be transmitted to the called party's terminal.

As described above, the present invention has an advantage that the exchanger displays more diverse information to more incoming subscribers by using the frequency shift modulation method of the calling party information display function provided using the conventional DMP method.

Another effect of the present invention is to provide a structure of an exchange that improves the additional service acceptability to be added in the future to the general analog subscribers in the general public switched network switch to the non-IDS subscribers by overcoming the limitations of the subscriber acceptability extension and service signaling channels.

Claims (12)

A time switch for switching and outputting various tone signals and audio signals by a predetermined control signal; A controller for controlling the time switch when the calling subscriber requests from the calling subscriber to selectively allocate a channel to the transmitting end or the receiving end of the time switch, and transmitting the calling party subscriber information to the called party through the assigned channel; And a frequency shift modulated signal transmitter for converting the subscriber subscriber information into a frequency shift modulated signal under the control of the controller and outputting the converted signal to a transmitter or receiver of the time switch. The method of claim 1, And the frequency shift modulated signal transmitter is connected to a front end of the time switch so that the frequency shift modulated sender information is transmitted without passing through the intra jitter in the time switch. The method according to claim 1 or 2, The calling party information is an electronic switch, characterized in that consisting of a variety of information, such as calling party number, name, date and current time. Claims [1] A method for transmitting calling party information to a called party when an outgoing call request is made from a calling party in an electronic switching machine, Detecting, at the exchange, that there is a call request from the callee; Allocating a channel for transmitting calling party subscriber information through a transmitting end or a receiving end of a time switch when detecting that there is a call request; And converting the calling party information into a frequency shifting modulation signal and transmitting the calling party information to the called subscriber through the assigned channel. The method of claim 4, wherein The subscriber station information transmission method using the frequency shift modulation method in the all-electronic auto exchange, characterized in that the frequency shifted outgoing subscriber information is transmitted in the idle period between ring signals. The method of claim 4, wherein And the frequency shift modulated sender information is transmitted before generation of the first ring signal. The method according to any one of claims 4 to 6, The calling party information is a calling party information transmission method using a frequency shift modulation method in an all-electronic auto switch, characterized in that consisting of a variety of information, such as calling party number, name, date and current time. Claims [1] A method for transmitting calling party information to a called party when an outgoing call request is made from a calling party in an electronic switching machine, Detecting, at the exchange, that there is a call request from the callee; Allocating a channel for transmitting calling party subscriber information through a transmitting end or a receiving end of a time switch when detecting that there is a call request; Detecting whether the called party is busy; When the called subscriber is not busy, transmitting frequency shift-modulated calling party subscriber information to the called party through the assigned channel; When the incoming subscriber is busy, receiving the DMP start code from the terminal of the called subscriber and transmitting the frequency shift-modulated outgoing subscriber information through the assigned channel. Method of transmitting subscriber information using frequency shift modulation method in. The method of claim 8, When the called party's terminal is not busy, the subscriber station information transmission method using the frequency shift modulation method in the all-electronic auto switch system is characterized in that the frequency shift modulated sender subscriber information is transmitted during a pause between ring signals. . The method of claim 8, When the called party's terminal is not in a call, the subscriber station information transmission method using the frequency shift modulation method in the all-electronic auto switch system is characterized by transmitting the frequency shift modulated sender information before the first ring signal is generated. . The method according to any one of claims 8 to 10, The calling party information is a calling party information transmission method using a frequency shift modulation method in an all-electronic automatic switchboard, characterized in that consisting of a variety of information, such as calling party number, name, date and current time. The method of claim 8, wherein the transmitting of the subscriber information comprises: Determining whether the incoming subscriber is a subscriber to the waiting service; When the called subscriber is a call waiting service subscriber, transmitting a call waiting tone signal to the called subscriber; Receiving a DMP start code from an incoming subscriber after transmitting the call tone signal; And transmitting the subscriber subscriber information in which the frequency shift is modulated after receiving the DMP start code.