KR100705933B1 - Method of providing calling identity delivery data in electronic switching system - Google Patents

Abstract

The present invention relates to a method for transmitting FSK data to display information on a caller before or during a call on a display terminal of a called service subscriber in an electronic switch, and the caller information (caller) before or during a call to a called party. By providing the name and the calling number, the called party can selectively answer the call.

Description

Method of providing calling identity delivery data in electronic switching system

1 is a system configuration to which the method of the present invention is applied;

2 is a flow chart for providing caller information before the start of a call when an electronic switch system to which an embodiment of the present invention is applied employs an R2 inter-state relay method;

Figure 3 is a flow chart for providing caller information before the start of the call when the electronic switch to which the embodiment of the present invention is applied ISUP between the station,

4 is a flow chart for providing caller information during a call when an electronic switch system to which an embodiment of the present invention is applied employs an R2 inter-office relay method;

FIG. 5 is a flowchart for providing caller information during a call when an electronic exchange system to which an embodiment of the present invention is applied employs an ISUP inter-country relay method; FIG.

6 is a view illustrating timing requirements in data transmission relating to a ring signal applied to a method for providing caller information before a call is started according to an embodiment of the present invention;

7A and 7B are diagrams illustrating an example of data transmission for displaying caller information during a call in an embodiment of the present invention;

8 is a description of each parameter of FIGS. 7A and 7B;

9 is an explanatory diagram showing an example of the success of a data transmission attempt during a caller information display operation during a call in the embodiment of the present invention;

10 is an explanatory diagram illustrating an example of a failure of data transmission attempt during a caller information display operation during a call in the embodiment of the present invention.

The present invention relates to a method for providing caller information in an electronic switchgear, and more particularly, a method for displaying information on a caller who is on-hook and off-hook. It is about.

The conventional caller ID display service uses a method of outputting only the phone number of the calling subscriber using DTMF.

In the conventional caller ID display service, only the telephone number of the calling party is provided, and even if the user wants to transmit the name of the calling party or various information from the database to the service subscriber, it is not possible to transmit text only using DTMF. It is necessarily emerging.

Accordingly, the present invention has been made in view of the above-described conventional situation, and provides a method for transmitting FSK data so that information on a caller before or during a call is displayed on a display terminal of an incoming service subscriber in an electronic switchboard. The purpose is.                         

In order to achieve the above object, a method for providing caller information in an electronic switch according to a preferred embodiment of the present invention, in a method for providing caller information to a terminal of the called party before or during a call in the electronic switchgear,

Checking whether the called party information display service is registered by the called subscriber when the incoming call setting request is input to the called party;

Collecting the calling number by requesting the calling number from the calling exchange when the calling party information displaying service is registered;

Querying the calling party information display blocking information based on the calling number at the called exchange when the calling number is collected normally; And

And if the calling subscriber information indication blocking information is false, constructing FSK data including the calling party information and sending it to the called party to display the calling party information on the called party's terminal.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail.

1 is a system configuration to which the method of the present invention is applied.

If the caller information display service exists in the called party service in the MP (ASC, etc.) prior to the call, the caller obtains the caller information and sends the FSKDataWrtRQ signal to the PP to request the caller information to the PP. In addition, the MP (ASC (Analog Subscriber Call Control Block)) checks whether or not a current subscriber is busy when a call is received. If present, send FSKDataWrtRQ signal to PP (LSP or Time Switch & Local Service Processor (TLSP)) to display caller information to called party during call. To command.

The PP receives the caller information before the call is initiated and receives the caller's name and caller's name information through the interface between the PP (LSP or TLSP) and the device for processing the FSK protocol through the TD-BUS. The caller ID is displayed between the first ring and the second ring. The PP outputs the information of the telephone number and caller's name of the calling party to the CPE through the interface with the device for processing the FSK protocol in a TD-BUS manner during a call. This operation starts when a new call is requested to the service subscriber when the subscriber line is in the off-hook state.

The interface between the processor at the exchange to handle the on-hook caller information display service and the device for processing the FSK protocol (hereinafter referred to as the FSKA board) is handled using TD-BUS. The interface between the PPs uses IPC.

Referring to the overall operation in the on-hook state in Fig. 1, when the calling subscriber attempts to call the called party, the ASC block examines its service, and as a result, the CIDN (On) to the called party's own service. -If caller information is displayed when hooking service is registered, request calling party number from calling party to collect calling party number and information from calling party, and then connect Initial Ring to Analog Subscriber Interface (ASI) block. After receiving the ACK from the ASI block, connect the Time Switch by requesting TSP or TLSP for caller information display.

In addition, it sends a FSKDataWrtRQ IPC to the PP (LSP or TLSP) to request the caller information to be displayed. The PP (LSP or TLSP) sends the subscriber information to the called party after 500 ms when the calling party information display function is ready.

Thereafter, between the second ring, the FSKA board transmits the caller information to the called subscriber so that the calling subscriber information is output to the called subscriber Premises Equipment (CPE) of the called subscriber.

Referring to the overall operation in the off-hook state in FIG. 1, when the new exchange request is requested to the service subscriber side when the service subscriber line is in the off-hook state, the first exchange caller and the service subscriber recognize the subscriber. Sends a SAS (Subscriber Alerting Signal), silences the call path of the initial state caller, and sends a CPE Alerting Signal (CAS) to the Customer Premise Equipment (CPE) on the subscriber side of the service subscriber. Send it out.

Here, the SAS signal informs the first party caller and the service subscriber that the new call is waiting. The CAS signal prepares the CPE on the service subscriber side to receive data. When receiving the CAS signal, the CPE temporarily stops the receiver of the subscriber of the service to prevent interference from the subscriber. The CPE connects the data receiver to the line and confirms that the data reception is ready. Send acknowledgment signal to electronic exchange.

The electronic exchange always transmits data after detecting the ACK signal. The exchange exchanges the message to the subscriber's CPE and immediately resets the channel of the original state caller when the transfer ends. At the same time, the service subscriber's CPE also terminates the receiver and the receiver from silence and completely restores the channel.

Next, the operation in the exchange for providing on-hook caller information according to an embodiment of the present invention will be described in detail as follows.

First, referring to FIG. 2, an operation of displaying a caller's caller ID when interworking with an R2 signaling system will be described. FIG.

When a call request is set up for a subscriber, it is checked whether the subscriber registers CIDN (on-hook caller information display) service. If the CIDN calling number display service is registered, the calling number is collected by the calling exchange.

And, if the caller number is collected normally, the caller is notified by inquiring the caller CID Blocking Index information from the name DB using the caller ID as the index. If the CID blocking index information is FALSE, FSK data is composed of a date, a current time, and a calling number.

After that, the first ring signal is connected, FSK data is transmitted, and then the ring signal is connected. Accordingly, since the calling party's calling number is displayed on the display terminal of the called party, the called party can see the displayed calling number and answer the call.

And, with reference to Figure 2 will be described the operation of displaying the caller name in the R2 signaling method during operation in the exchange for providing on-hook caller information according to an embodiment of the present invention.

When a call request is set up for a subscriber, it is checked whether the subscriber registers CIDN (on-hook caller information display) service. If the CIDN caller name display service is registered, the calling party requests the calling number to collect the calling number.

If the calling party number is collected normally, the called party is notified by inquiring the calling party CID Blocking Index information and the calling party name information by using the calling number as the index.

If the CID blocking index information is false, FSK data is composed of a date, a current time, a calling number, and a caller name. Connect the first ring signal and send the FSK data, then connect the ring signal.

In addition, with reference to Figure 3 will be described the call number display operation in the ISUP interval during the operation in the exchange for providing on-hook caller information according to an embodiment of the present invention.

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If the CIDN calling number display service is registered, the subscriber CID blocking index information is examined. If the CID blocking index information is FALSE, the FSK data is composed of date, current time, and calling number. Connect the first ring signal and send the FSK data, then connect the ring signal.

3, an operation of displaying a caller name in an ISUP signaling method during operation in an exchange for providing on-hook caller information according to an embodiment of the present invention will be described.

When the incoming call setting request is received from the called subscriber in the ISUP relay section, the calling number and the CID blocking index information are transmitted through the ISUP message from the calling exchange to the called exchange.

If the CIDN caller name display service is registered, the subscriber CID blocking index information is examined.

If the CID blocking index information is FALSE, the called exchange is notified by inquiring caller name information from the name DB using the calling number as an index.

When the caller name information is collected normally, the FSK data is configured with a date, a current time, a calling number, and a caller name. After that, the first ring signal is connected, FSK data is transmitted, and then the ring signal is connected.

In the above-described embodiment of the present invention, if the called subscriber responds before sending the FSK data, which is the caller information, at the called exchange, the exchange performs response processing of the called subscriber without sending the FSK data.

And, in the above-described embodiment of the present invention, if the called subscriber responds while sending the FSK data, which is the caller information, the called exchange stops sending the FSK data and performs the called subscriber response process.

A data transmission protocol employed in an embodiment of the present invention, that is, a data transmission protocol for displaying caller information before initiation of a call is as follows.

If the ring signal is involved in the transmission of the on-hook state, the electronic exchange may at least provide an interface for half-duplex data transmission from the electronic exchange to the subscriber station and recognize the line state of the subscriber. The exchange shall support data transmission in 8-bit code. In addition, monitoring of line status continues during data transfer.

6 shows timing requirements for data transmission related to the ring signal. Data transmission related to the ring signal must always be in the silent period between the first and second ring signals. Data transmission, including channel occupancy and mark signals, begins at least 500 to 700 ms after the end of the first ring signal and ends at least 250 ms before the start of the second ring signal.

Then, error detection of the FSK data calculates a checksum word of each message and adds it to the message according to a special algorithm at the transmitting side. The receiving device recalculates the checksum word and compares it with the checksum word transmitted in the message frame. If these two values match, it is considered that there is no error in the received message, but the occurrence of an offset bit error of the same message cannot be detected. Error correction is not supported in this protocol.

The last word in every CID data message frame is a checksum word. The checksum word is the two's complement of the remainder (modulo 256) divided by the binary value of the sum of the remaining words. In computing the checksum, the message type, message length, parameter type, and parameter length are given in their binary form. For correct detection of checksums and messages, the CPE must correctly receive an end bit for the checksum.

In addition, the response to the abnormal response in the caller information display service before the call start according to the embodiment of the present invention described above is as follows.

In the case of a public telephone call, the called exchange exchanges the FSK data with a non-display reason code ('C') indicating that it is a public phone instead of the calling number and the calling party name.

In addition, when the calling subscriber is a third party subscriber or the caller ID or caller name information is not normally received, the FSK data is configured and transmitted with a non-displayable reason code (O) indicating that it cannot be collected.

On the other hand, the operation in the exchange for providing the caller information during the call (off-hook) according to an embodiment of the present invention will be described. First, the caller ID display when the R2 signaling is linked will be described with reference to FIG. 4.

When the incoming call setup request is received from a busy subscriber, it is checked whether the subscriber's CIDF (caller information indication) service is registered.

If the CIDF originating number display service is registered, the calling number is collected by the calling exchange.

If the caller ID is collected normally, the recipient exchange is notified by inquiring the caller CID blocking index information to the name DB using the caller ID as the index.

If the CID blocking index information is FALSE, FSK data is composed of a date, a current time, and a calling number. It stops the connection with the incoming subscriber in the current call, connects the incoming subscriber with the Dtmf receiver and the Fsk device, and transmits FSK data (SAS, CAS, CID data).

And, the operation of the caller name display in the R2 signaling method during the operation in the exchange for providing the caller information in the off-hook according to an embodiment of the present invention will be described with reference to FIG.

When the subscriber receives the call setup request, it checks whether the subscriber registers the CIDF service. If the CIDF caller name display service is registered, the calling party requests the calling number to collect calling numbers.

If the calling number is collected normally, the called exchange is notified by inquiring the calling party CID blocking index information and the calling name information from the name DB using the calling number as an index. If the CID blocking index information is FALSE, FSK data is composed of a date, a current time, a calling number, and a caller name.

Then, the connection is terminated with the current subscriber in the call, and the incoming subscriber, the Dtmf receiver, and the Fsk device are connected, and FSK data (SAS, CAS, and CID data) are transmitted.

In addition, an operation of displaying an outgoing number in an ISUP section during an operation in an exchange for providing caller information in an off-hook according to an embodiment of the present invention will be described with reference to FIG. 5.

When an incoming call setup request is received from the called subscriber in the ISUP relay section, the calling number and CID blocking index information are transmitted through the ISUP message from the calling exchange to the called exchange.

If the CIDF calling number display service is registered, the subscriber CID blocking index information is examined, and if the CID blocking index information is FALSE, the FSK data is composed of a date, a current time, and a calling number. It stops the connection with the incoming subscriber in the current call, connects the incoming subscriber with the Dtmf receiver and the Fsk device, and transmits FSK data (SAS, CAS, CID data).

The caller name display operation in the ISUP signaling method during the operation in the exchange for providing the caller information during the off-hook according to the embodiment of the present invention will be described with reference to FIG. 5.

When an incoming call setup request is received from the called subscriber in the ISUP relay section, the calling number and CID blocking index information are transmitted through the ISUP message from the calling exchange to the called exchange.

If the CIDF caller name display service is registered, the subscriber CID blocking index information is examined. If the checked CID blocking index information is FALSE, the caller name information is referred to the name DB using the calling party number as an index from the destination exchange. Be notified.

When the caller name information is collected normally, the FSK data is configured by date, current time, and calling number, and the connection with the called subscriber in the current call is stopped, and the FSK after connecting the called subscriber with the Dtmf receiver and the Fsk device. Send data (SAS, CAS, CID data).

The protocol of successful transmission during data transmission for displaying off-hook caller information is shown in FIG. 7A, and the protocol of unsuccessful transmission is shown in FIG. 7B. In FIG. 7A and FIG. 7B, each parameter has the same range as in FIG. 8 and performs data transmission with a value within the prescribed range.

Here, timing requirements of a CAS (CPE Alerting Signal) signal and an ACK signal transmitted between an electronic exchange and a Customer Premises Equipment (CPE) required for data transmission in a busy state are as follows.

1. The exchange shall send FSK data after receiving the ACK signal in consideration of the possibility of collision.

2. In any case, the exchange shall send FSK data within 50-300ms after the receipt of the ACK signal.

3. The exchange shall recover the channel between 40 and 120 ms after the end of the checksum word.

4. If the electronic exchange fails to transmit FSK data (such as not receiving an ACK), the original channel shall be restored within 40-120 ms after the end of I time.

On the other hand, the electronic exchange shall immediately stop transmitting data when it recognizes the subscriber's HOOK-FLASH or call truncation. If the electronic exchange recognizes a call drop due to the reason of the first counterpart or new caller during the FSK data transmission, it should continue the ongoing data transmission.

On the other hand, the electronic switch according to the embodiment of the present invention connects the DTMF receiver to the service subscriber side line between the first party caller side voice interrupt start time and the CAS signal transmission end time. That is, the electronic exchange shall be ready to receive a specific DTMF signal (DTMF "D": 1633Hz X 941Hz) which is an ACK signal for I time after the termination of CAS signal transmission. All generated signals should be ignored.

On the other hand, if the transmission of the data for the caller information display during the call is successful, the procedure and operation as shown in FIG. That is, after detecting the ACK signal, the exchange should ignore any DTMF signal and start timing for the J time interval. The exchange shall disconnect the DTMF receiver from the line at least within the time interval that exists after the detection of the ACK signal and before the resetting of the call.

On the contrary, if the transmission of the data for displaying the caller information during the call fails, that is, if the electronic exchange does not receive an ACK within the I time interval or if the FSK data cannot be transmitted within the time limit even after receiving the ACK signal, If it is considered that the transmission attempt failed, the procedure and operation shown in FIG. 10 are satisfied. That is, the electronic exchange must disconnect the DTMF receiver from the called line within the time interval between the end of the I time interval and the resetting of the call.

The error detection of the FSK data of the caller information display operation during the call calculates the checksum word of each message and adds it to the message according to a special algorithm at the sender. The receiving device recalculates the checksum word and compares it with the checksum word transmitted in the message frame. If these two values match, it is considered that there is no error in the received message, but the occurrence of an offset bit error of the same message cannot be detected. Error correction is not supported in this protocol.

The last word in every CID data message frame is a checksum word. The checksum word is the two's complement of the remainder (modulo 256) divided by the binary value of the sum of the remaining words. In computing the checksum, the message type, message length, parameter type, and parameter length are given in their binary form. For correct detection of checksums and messages, the CPE must correctly receive an end bit for the checksum.

Response to abnormal response during caller information display service is as follows.

1. In the case of public telephone call, FSK data is composed and sent by the destination exchange with a non-display reason code ('C') indicating that it is a public phone instead of the calling number and caller's name.

2. If the calling subscriber is a third party subscriber or the caller ID or caller name information is not normally received, the FSK data is composed and sent with a non-displayable reason code ('O') indicating that it cannot be collected.

According to the present invention as described above, by providing the called party information (caller name, call number) before or during the call to the called party, the called party can selectively receive the call.

In addition, even when a new service, that is, information service (securities information, weather information, etc.) is required, the interface with the device for the FSK protocol can be easily developed.

On the other hand, the present invention is not limited to the above-described embodiment, but can be modified and modified within the scope not departing from the gist of the present invention, such modifications and changes should be regarded as belonging to the following claims. will be.

Claims (16)

In the method for providing caller information to the called party's terminal in an electronic switch system employing R2 signaling, Checking whether the called party registration service is registered by the called party when the incoming call setting request is input; Collecting the calling number by requesting the calling number from the calling exchange when the calling number display service is registered; Querying the calling subscriber information display blocking information in the name database based on the calling number in the called exchange when the calling number is collected normally; And And if the calling subscriber information indication blocking information is false, configuring the calling party information including the calling number in the called exchanger as FSK data and transmitting the FSK data to the called party's terminal. The method of claim 1, And if the called subscriber responds before sending the FSK data in the called exchange, the called exchange performs response processing of the called subscriber without sending the FSK data. The method of claim 1, And when the called subscriber responds while the FSK data is sent by the called exchange, stopping sending FSK data and performing response processing of the called subscriber. In the method for providing caller information to the called party's terminal in an electronic switch system employing the ISUP relay method, Checking whether the called party registration service is registered by the called party when the incoming call setting request is input; Examining caller information display blocking index information included in an ISUP message provided from an originating exchange when the caller ID service is registered; And If the caller information indication blocking index information is false as a result of the survey, the caller information is configured by the destination exchanger to send the caller information including the calling number in the ISUP message to the called party's terminal by configuring the FSK data. How to Provide. The method of claim 4, wherein And if the called subscriber responds before sending the FSK data in the called exchange, the called exchange performs response processing of the called subscriber without sending the FSK data. The method of claim 4, wherein And when the called subscriber responds while the FSK data is sent by the called exchange, stopping sending FSK data and performing response processing of the called subscriber. In the method for providing caller information to the called party's terminal in an electronic switch system employing R2 signaling, Checking whether a caller name display service is registered by a corresponding subscriber when a call setup request is input; Collecting the calling number by requesting the calling number from the calling exchange when the calling name display service is registered; Inquiring caller information display blocking index information and caller name information in a name database based on the caller number at the destination exchange when the caller number is normally collected; And And if the calling party information display blocking information is false, configuring the calling party information including the calling party name as FSK data and transmitting the FSK data to the terminal of the called party. The method of claim 7, wherein And if the called subscriber responds before sending the FSK data in the called exchange, the called exchange performs response processing of the called subscriber without sending the FSK data. The method of claim 7, wherein And when the called subscriber responds while the FSK data is sent by the called exchange, stopping sending FSK data and performing response processing of the called subscriber. In the method of providing the caller information to the terminal of the incoming call in the electronic switchboard employing the ISUP relay method, Checking whether a caller name display service is registered by a corresponding subscriber when a call setup request is input; Examining caller information display blocking index information included in an ISUP message provided from an originating exchange when the caller name display service is registered; If the calling party information display blocking index information is false, retrieving calling party name information from a name database based on a calling number in the ISUP message at a called exchange; And And when the caller name information is collected normally, a caller information providing method comprising the step of configuring the caller information including the caller name as FSK data and transmitting the FSK data to the called terminal. The method of claim 10, And if the called subscriber responds before sending the FSK data in the called exchange, the called exchange performs response processing of the called subscriber without sending the FSK data. The method of claim 10, And when the called subscriber responds while the FSK data is sent by the called exchange, stopping sending FSK data and performing response processing of the called subscriber. delete delete delete delete

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