KR100355296B1 - Method for processing call waiting function at hand over between msc and msc - Google Patents

Abstract

The present invention provides a method for processing a call waiting function during a handover during an exchange, and more particularly, a switch connected to a terminal of a call waiting function holder to perform a call waiting function normally during a handover call. The present invention relates to a method for processing a call waiting function, according to the present invention, which ensures that the call waiting function is normally performed even during a handover of an exchange period, thereby ensuring the best call quality to the subscriber, thereby increasing the reliability of the subscriber. It has the effect of improving competitiveness with other companies.

Description

How to handle call waiting during handover during exchange period {METHOD FOR PROCESSING CALL WAITING FUNCTION AT HAND OVER BETWEEN MSC AND MSC}

The present invention relates to a method for processing a call waiting function during handover during an exchange period, and more particularly, a switch connected to a terminal of a call waiting function holder to normally perform a call waiting function during a handover call. The present invention relates to a method for handling a call waiting function during a handover of an exchange period.

As is well known, call waiting functing means that a call waiting tone is connected to a function holding terminal when a call waiting function holder is requested to receive a call from a third party at the first call. To inform the function holder that there is another incoming call, and when the function holder presses the SEND KEY, he / she connects the call with a third party subscriber and also holds the hold tone to the first caller. it means. In addition, the call waiting function holder can alternately press the send key with the first subscriber and the third subscriber.

On the other hand, if a handover occurs to the function holder during the call waiting function holder and the third subscriber, the path to the function holder's call is changed to a switchover where the handover has occurred.

However, the call waiting function processing method in the conventional mobile communication exchange, in the case of the handover described above, the call is disconnected because the call waiting function control block, which is a block controlling the call waiting function, only knows the pass information of the existing call. Or there was a problem that caused silence or confusion.

This phenomenon may cause a problem that not only provides the subscriber with the best call quality, but also degrades the subscriber's satisfaction, as well as the competitiveness with other companies.

Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to ensure that the standby function is normally performed even during the exchange period handover, thereby ensuring the best call quality to the subscriber. The present invention provides a method for handling a call waiting function during handover.

In order to achieve the above object, the method for processing a call waiting function during a handover of an exchange period of the present invention interworks with a first exchange performing a call processing of a first terminal and a third exchange performing a call processing of a third terminal. And a second call processing control unit for performing call processing of the second terminal, a call waiting function control unit for processing an additional service function during a call, and a second exchanger including a handover processing unit for handover processing. A method of processing a call waiting function during a handover of an exchange period in a system,

If a handover occurs in the second terminal while the first terminal and the second terminal are in a call, the second call processing controller in the second exchange performs a handover processing operation, and then normal operation between the first and second terminals is performed. An eleventh step of conducting a call;

A twelfth step of notifying, by the second call processing control unit, that the call is requested by the third exchange to the third exchange that the call is currently busy;

A thirteenth step, wherein the second call processing controller determines whether a busy waiting function check signal has been received from the third exchange;

If the busy standby function confirmation signal is not received from the third exchange in the thirteenth step, the flow returns to the thirteenth step, and if the busy standby function confirmation signal is received from the third exchange. A 14th step of, by the second call processing controller, transmitting a call waiting function request signal including a handover flag and handover pass information set to "TRUE" to the call waiting function controller; And

The call waiting function control unit comprises a fifteenth step of interworking with a first exchanger and a third exchanger to perform a call waiting function between the first and second terminals and to proceed with a call between the second and third terminals. It features.

In addition, the method for processing a call waiting function during a handover of an exchange period of the present invention may interoperate with a first exchange performing a call processing of the first terminal and a third exchange performing a call processing of the third terminal and at the same time a second terminal. Handover period in the mobile communication system comprising a second call processing control unit for performing a call processing of the call, a call waiting function control unit for processing the additional service function during the call, and a second switch having a handover processing unit for processing the handover In the over-call waiting function processing method,

A second call processing control unit in the second exchange when the first terminal and the second terminal are in a mutual call, notifying the third exchange that the user is currently busy when receiving a call setup request from the third exchange. step;

A twenty-second step of determining, by the second call processing control unit, whether a busy waiting function confirmation signal has been received from the third exchange;

If the busy standby function presence / absence confirmation signal is not received from the third exchange in the twenty-second step, the flow returns to the twenty-second step, and if the busy standby function presence / absence confirmation signal is received from the third exchange. (23) the second call processing controller requesting the call waiting function to the call waiting function controller;

A twenty-fourth step of allowing the call waiting function control unit to interwork with a first exchanger and a third exchanger to perform a call waiting function between the first and second terminals and to conduct a call between the second and third terminals;

A twenty-fifth step, wherein the second call processing controller performs a handover processing operation when a handover occurs in the second terminal; And

If the second call processing controller is notified of the call release from the third terminal, the normal call control request is notified to the first exchange and a normal service including handover flag and handover pass information set to "TRUE". And a twenty-sixth step of notifying the control request to proceed with the call between the first and second terminals.

1 is a functional block diagram showing the configuration of a call waiting function processing apparatus during an exchange period handover according to the present invention;

2 is an operation flowchart illustrating a method for processing a call waiting function during an exchange period handover according to an embodiment of the present invention;

3 is an operation flowchart showing the detailed operation of the eleventh step (S11) in the method for processing a call waiting function during an exchange period handover according to FIG. 2;

4 is an operation flowchart showing the detailed operation of the fifteenth step S15 in the method for processing a call waiting function during an exchange period handover according to FIG. 2;

5 is a signal flowchart illustrating a method for processing a call waiting function during a handover of an exchange period according to FIG. 2;

6 is an operation flowchart showing a method for processing a call waiting function during an exchange period handover according to an embodiment of the present invention;

7 is an operation flowchart showing the detailed operation of the 24th step (S24) in the method for processing a call waiting function during an exchange period handover according to FIG. 6;

FIG. 8 is an operation flowchart showing a detailed operation of step 25 (S25) in the method for processing call waiting function during handover of an exchange period according to FIG. 6;

FIG. 9 is a signal flowchart illustrating a method for processing a call waiting function during an exchange period handover according to FIG. 6.

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

1: first terminal 2: second terminal

3: third terminal 100: first exchanger

200: second exchanger 201: second call processing control unit

202: call waiting function control unit 203: handover processing unit

300: third exchanger

Hereinafter, a method for processing a call waiting function during a handover of an exchange period according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a functional block diagram of a call waiting function processing device during an exchange period handover according to the present invention. The call waiting function processing device during an exchange period handover according to the present invention is a second call processing control unit (MCC: Mobile Call). Control block (201), a call waiting function control unit (MCAW: Mobile Call Waiting) (202), and a handover processing unit (HOC: Hand Over Control Block) 203. .

At this time, in the following description, a control station and a base station mounted therebetween during call processing between the first, second, and third terminals (1, 2, 3) and the first, second, and third exchangers (100, 200, 300). In addition, in the second switch 200, an MSA (Mobile Signaling Access) block performing a function of an interface with a control station and an MPC performing a paging function to a terminal are provided. (Mobile Paging Control) block will be omitted. In addition, it is assumed that the second terminal 2 which is under call control by the second call processing control unit 201 in the second exchange 200 has a standby add service function.

The second call processing control unit 201 mounted in the second exchanger 200 performs call processing of the first exchanger 100 and the third terminal 3 which perform the call processing of the first terminal 1. In conjunction with the third switch 300 to perform the call processing of the second terminal (2).

In addition, the call waiting function control unit 202 mounted in the second switch 200 serves to process an additional service function during a call when a call request is attempted from another terminal during a call processing process.

On the other hand, the handover processing unit 203 mounted in the second exchanger 200 plays a role in processing a handover period during the call processing process.

Then, with reference to Figs. 2 and 5 for the method for processing the call waiting function during the exchange period handover according to an embodiment of the present invention using the apparatus for processing call waiting function during the exchange period handover having the above configuration. Let's explain.

In the following description of the operation, when the first and second terminals 1 and 2 are in mutual communication, the second terminal 2 performs a handover, and then the call establishment is requested from the third terminal 3. Assume

First, the second call processing control unit 201 in the second switch 200 performs a handover processing operation when the handover occurs in the second terminal 2 connected to the first and second terminals. The normal call between (1, 2) continues to proceed (S11).

Hereinafter, the detailed operation process of the eleventh step S11 will be described with reference to FIG. 3. First, the second call processing control unit 201 is a call between the first and second terminals 1 and 2 in progress. In operation S11-1, it is determined whether the handover control request signal HandoverCtrlRQ is received from the handover processing unit 203.

At this time, if the handover control request signal HandoverCtrlRQ is not received from the handover processing unit 203 in step 11-1 (S11-1) (NO), the second call processing control unit 201 returns to the above. If the handover control request signal (HandoverCtrlRQ) is received from the handover processing unit 203 (YES) as shown in FIG. 5, the second call processing control unit proceeds to step 11-1 (S11-1). 201 sets its own handover flag to "TRUE" and simultaneously connects the handover path (S11-2).

Thereafter, the second call processing control unit 201 transmits a response signal (HandoverCtrlRP) to the handover control request signal to the handover processing unit 203, as shown in FIG. The call between the terminals 1 and 2 is advanced (S11-3).

After the eleventh step S11 described above, the second call processing control unit 201 is busy on the call from the third exchange 300 as the third terminal 3 attempts to call the second terminal 2. Upon receiving the confirmation request signal BusyConfRQ, as shown in FIG. 5, the busy confirmation response signal BusyConfRP is transmitted to the third switch 300 to notify that the user is currently busy (S12).

Thereafter, the second call processing control unit 201 determines whether a call waiting / absence confirmation signal CAWSvcRP is received from the third switch 300 (S13).

At this time, in the thirteenth step (S13), if the call waiting function presence / absence confirmation signal CAWSvcRP is not received from the third switch 300 (NO), the second call processing control unit 201 returns to the In step 13 (S13), the call waiting function confirmation signal (CAWSvcRP) is received from the third switch 300 as shown in Figure 5 (YES), the second call processing The control unit 201 transmits the call waiting function request signal CAWSvcRQ including the handover flag set to TRUE and the handover pass information to the call waiting function control unit 202 (S14).

Then, the call waiting function control unit 202 interoperates with the first exchanger 100 and the third exchanger 300 to perform a standby function during the call between the first and second terminals 1 and 2 and simultaneously The call proceeds between the second and third terminals 2 and 3 (S15).

Hereinafter, the detailed operation process of the above-described fifteenth step S15 will be described with reference to FIG. 4. First, the call waiting function control unit 202 in the second exchanger 200 is configured as shown in FIG. 5. 3 transmits a paging response signal (PageRP) to the switch 300 (S15-1).

Then, when the call waiting function control unit 202 is notified of the called subscriber information (CdSubsInfoRP) of the third terminal 3 from the third switch 300, the second managed by itself as shown in FIG. The call setup request signal Setup_CI is transmitted to the terminal 2, and the called party call start notification signal AlertingRP is transmitted to the third switch 300 (S15-2).

Subsequently, the call waiting function control unit 202 determines whether the subscriber of the second terminal 2 inputs "SEND" (S15-3).

At this time, if the subscriber of the second terminal 2 does not input "SEND" in step 15-3 (S15-3) (NO), the call waiting function control unit 202 again returns to the 15-3. If the subscriber of the second terminal 2 inputs "SEND" (YES), the call waiting function control unit 202 proceeds to the third step as shown in FIG. The incoming response signal CdAnsRP and the additional service notification signal SubsSvcRP are transmitted to the exchange 3 (S15-4).

Then, when the call waiting function control unit 202 receives the response signal SubsSvcAck for the additional service notification from the third switch 300, the first switch 300 as the first caller as shown in FIG. 5. In step S15-5, the additional service notification signal SubsSvcRP is transmitted.

Subsequently, when the call waiting function control unit 202 receives the response signal SubsSvcAck for the additional service notification from the first exchange 100, the call waiting function control unit 202 receives a pending sound to the first exchange 100 as shown in FIG. 5. After the connection request signal HoldToneConnRQ is transmitted to perform the call waiting function between the first and second terminals 1 and 2, the call proceeds between the second and third terminals 2 and 3 (S15-6). ).

On the other hand, in the following description with reference to Figs. 6, 9 will be described with respect to the method of processing the call waiting function during the exchange period handover according to this embodiment of the present invention.

In the following operation description, the second terminal 2 performs the handover after receiving a call setup request from the third terminal 3 when the first and second terminals 1 and 2 are in mutual communication. Assume

First, the second call processing control unit 201 in the second exchanger 200 is busy with the call from the third exchanger 300 as the third terminal 3 attempts to call the second terminal 2. Upon receiving the confirmation request signal BusyConfRQ, as shown in FIG. 9, the busy confirmation response signal BusyConfRP is transmitted to the third switch 300 to notify that the user is currently busy (S21).

Thereafter, the second call processing control unit 201 determines whether a call waiting / absence confirmation signal CAWSvcRP is received from the third exchange 300 (S22).

At this time, if the call waiting function presence / absence confirmation signal CAWSvcRP is not received from the third switch 300 in step 22 (S22) (NO), the second call processing control unit 201 returns the When the process proceeds to the twenty-second step S22 and a call waiting / absence check signal CAWSvcRP is received from the third switch 300 as shown in FIG. 9 (YES), the second call processing is performed. The control unit 201 transmits the call waiting function request signal CAWSvcRQ including the handover flag set to TRUE and the handover pass information to the call waiting function control unit 202 (S23).

Then, the call waiting function control unit 202 interworks with the first exchanger 100 and the third exchanger 300 to perform a standby function during the call between the first and second terminals 1 and 2 and simultaneously The call proceeds between the second and third terminals 2 and 3 (S24).

Hereinafter, the detailed operation process of the above-described twenty-fourth step S24 will be described with reference to FIG. 7. First, the call waiting function control unit 202 in the second exchanger 200 is configured as shown in FIG. 9. 3 transmits the paging response signal (PageRP) to the switch 300 (S24-1).

Then, when the call waiting function control unit 202 is notified of the called subscriber information (CdSubsInfoRP) of the third terminal 2 from the third switch 300, the second managed by itself as shown in FIG. The call setup request signal Setup_CI is transmitted to the terminal 2 and the called party call start notification signal AlertingRP is transmitted to the third switch 300 (S24-2).

Subsequently, the call waiting function control unit 202 determines whether the subscriber of the second terminal 2 inputs "SEND" (S24-3).

At this time, if the subscriber of the second terminal 2 does not input "SEND" in step S24-3 (NO) (NO), the call waiting function control unit 202 again performs the step 24-3. If the subscriber of the second terminal 2 enters "SEND" (YES), the call waiting function control unit 202 proceeds to step S24-3, as shown in FIG. The incoming response signal CdAnsRP and the additional service notification signal SubsSvcRP are transmitted to the exchange 3 (S24-4).

Then, when the call waiting function controller 202 receives the response signal SubsSvcAck for the additional service notification from the third switch 300, the first switch 300 as the first caller as shown in FIG. 9. In step S24-5, the additional service notification signal SubsSvcRP is transmitted.

Subsequently, when the call waiting function control unit 202 receives the response signal SubsSvcAck for the additional service notification from the first exchange 100, the call waiting function control unit 202 receives a pending sound to the first exchange 100 as shown in FIG. 9. After performing a call waiting function between the first and second terminals 1 and 2 by transmitting a connection request signal HoldToneConnRQ, the call proceeds between the second and third terminals 2 and 3 (S24-6). ).

After the twenty-fourth step S24, the second call processing controller 201 performs a handover processing operation when a handover occurs in the second terminal 2 (S25).

Hereinafter, the detailed operation process of the above-described 25th step S25 will be described with reference to FIG. 8. First, the second call processing controller 201 is in a call between the second and third terminals 2 and 3. It is determined whether the handover control request signal (HandoverCtrlRQ) is received from the handover processing unit 203 when the call waiting function is in progress between the first and second terminals 1 and 2 (S25-1).

At this time, when the handover control request signal HandoverCtrlRQ is not received from the handover processing unit 203 in step 25-1 (S25-1) (NO), the second call processing control unit 201 returns to the above. If the handover control request signal HandoverCtrlRQ is received from the handover processing unit 203 (YES) as shown in FIG. 9, the second call processing control unit proceeds to step 25-1 (S25-1). 201 sets its own handover flag to "TRUE" and simultaneously connects the handover path (S25-2).

Thereafter, the second call processing control unit 201 transmits a response signal (HandoverCtrlRP) to the handover control request signal to the handover processing unit 203, as shown in FIG. The call between the terminals 2 and 3 is advanced (S25-3).

After the 25 th step S25, when the second call processing control unit 201 receives the call release request signal CgRelRP from the third terminal 3, the first switch as shown in FIG. 9. The normal call control request signal (NormCtrlRQ) is notified to (100). Then, when the second call processing control unit 201 receives the normal call control response signal NormCtrlRP from the first switch 100 as shown in FIG. 9, the handover flag set to "TRUE" and The normal service control request signal NormSubsctrlRQ including the handover pass information is transmitted to the first switch 100 to proceed with the call between the first and second terminals 1 and 2 (S26).

As described above, according to the present invention, the method for processing the call waiting function during handover of the exchange period not only ensures the best call quality to the subscriber by ensuring that the call waiting function is normally performed even during the handover of the exchange period. Therefore, it has an excellent effect of improving the competitiveness with subscribers by increasing the reliability with subscribers.

Claims (6)

A second call processing control unit performing call processing of the second terminal simultaneously with interworking with a first exchange performing a call processing of the first terminal and a third exchange performing a call processing of the third terminal, an additional service function during a call In the mobile communication system comprising a call waiting function control unit for processing a second hand exchange processing unit and a handover processing unit for processing a handover, during the call-over time during the exchange period handover processing method, If a handover occurs in the second terminal while the first terminal and the second terminal are in a call, the second call processing controller in the second exchange performs a handover processing operation, and then normal operation between the first and second terminals is performed. An eleventh step of conducting a call; A twelfth step of notifying, by the second call processing control unit, that the call is requested by the third exchange to the third exchange that the call is currently busy; A thirteenth step, wherein the second call processing controller determines whether a busy waiting function check signal has been received from the third exchange; If the busy standby function confirmation signal is not received from the third exchange in the thirteenth step, the flow returns to the thirteenth step, and if the busy standby function confirmation signal is received from the third exchange. A 14th step of, by the second call processing controller, transmitting a call waiting function request signal including a handover flag and handover pass information set to "TRUE" to the call waiting function controller; And The call waiting function control unit comprises a fifteenth step of interworking with the first switch and the third switch to perform a call waiting function between the first and second terminals and to proceed with a call between the second and third terminals. A method for processing a call waiting function during a handover during an exchange period. The method of claim 1, In the eleventh step, an eleventh step in which the second call processing controller in the second exchange determines whether a handover control request is received from the handover processing unit when a call between first and second terminals is in progress. ; If the handover control request is not received from the handover processor in step 11-1, the process proceeds to step 11-1 again, and when the handover control request is received from the handover processor, the second call processing controller Setting the handover flag to "TRUE" and simultaneously connecting a handover pass; And The second call processing control unit transmits a response signal for a handover control request to the handover processing unit, and then performs a normal exchange between the first and second terminals. How to handle call waiting during call. The method of claim 1, The fifteenth step may include: a fifteenth step of informing the call exchange function control unit of the second exchange to notify the third exchange of a paging response; When the call waiting function controller is notified of the called subscriber information of the third terminal from the third exchange, the call waiting function is requested to the second terminal managed by the third exchange and the notification of the called party's initiation of the call is made to the third exchange. Two steps; Step 15-3, wherein the call waiting function controller determines whether the subscriber of the second terminal inputs “SEND”; If the subscriber of the second terminal does not input "SEND" in step 15-3, the process proceeds to step 15-3 again, and if the subscriber of the second terminal inputs "SEND", the call waiting A step 15-4 of the function control unit performing an incoming response and additional service notification to the third exchange; Step 15-5, when the call waiting function controller receives a response to the additional service notification from the third exchange, performing the additional service notification to the first exchange that is the first caller; And When the call waiting function control unit receives a response to the additional service notification from the first exchange, it requests a hold tone connection to the first exchange to perform a waiting function between the first and second terminals, and then, the second, 3. The method of waiting for a call during a handover of an exchange period, characterized in that it comprises a 15-6 step of proceeding a call between three terminals. A second call processing control unit performing call processing of the second terminal simultaneously with interworking with a first exchange performing a call processing of the first terminal and a third exchange performing a call processing of the third terminal, an additional service function during a call In the mobile communication system comprising a call waiting function control unit for processing a second hand exchange processing unit and a handover processing unit for processing a handover, during the call-over time during the exchange period handover processing method, A second call processing control unit in the second exchange when the first terminal and the second terminal are in a mutual call, notifying the third exchange that the user is currently busy when receiving a call setup request from the third exchange. step; A twenty-second step of determining, by the second call processing control unit, whether a busy waiting function confirmation signal has been received from the third exchange; If the busy standby function presence / absence confirmation signal is not received from the third exchange in the twenty-second step, the flow returns to the twenty-second step, and if the busy standby function presence / absence confirmation signal is received from the third exchange. (23) the second call processing controller requesting the call waiting function to the call waiting function controller; A twenty-fourth step of allowing the call waiting function control unit to interwork with a first exchanger and a third exchanger to perform a call waiting function between the first and second terminals and to conduct a call between the second and third terminals; A twenty-fifth step of performing, by the second call processing controller, a handover processing operation when a handover occurs in the second terminal; And If the second call processing controller is notified of the call release from the third terminal, the normal call control request is notified to the first exchange and a normal service including handover flag and handover pass information set to "TRUE". And a twenty-sixth step of notifying the control request to proceed with the call between the first and second terminals. The method of claim 4, wherein The twenty-fourth step may include: twenty-fourth-one step of notifying, by the second inter-exchange call waiting function control unit, of the paging response to the third exchange; If the call waiting function control unit is informed of the called party information of the third terminal from the third exchange, requesting call setup to the second terminal managed by the third switch and notifying the called party to start calling the third exchange; Two steps; Step 24-3, wherein the call waiting function controller determines whether a subscriber of the second terminal inputs “SEND”; If the subscriber of the second terminal does not input "SEND" in step 24-3, the process proceeds to the 24-24 step again, while if the subscriber of the second terminal inputs "SEND", the call waiting Step 24-4, wherein the function controller performs an incoming response and an additional service notification to the third exchange; Step 24-5, when the call waiting function controller receives a response to the additional service notification from the third exchange, performing the additional service notification to the first exchange that is the first caller; And When the call waiting function control unit receives a response to the additional service notification from the first exchange, it requests a hold tone connection to the first exchange to perform a waiting function between the first and second terminals, and then, the second, 3. The method of waiting for a call during a handover of an exchange period, characterized in that it comprises a 24 th-6 th step of proceeding a call between three terminals. The method of claim 4, wherein In the twenty-fifth step, a handover control request is received from the handover processing unit when a call is in progress between the second and third terminals while the second call processing controller in the second exchange is in process of waiting for a call between the first and second terminals. A step 25-1 of determining whether a received message has been received; If the handover control request is not received from the handover processor in step 25-1, the process proceeds to step 25-1 again, and if the handover control request is received from the handover processor, the second call processing controller Setting a handover flag to "TRUE" and simultaneously connecting a handover pass; And The second call processing control unit transmits a response signal for a handover control request to the handover processing unit and then proceeds with a normal call between the second and third terminals. How to handle call waiting during call.