KR20020044936A - Method for holding answer in a mobile communication system - Google Patents

Abstract

PURPOSE: A method for holding an answer in a mobile system is provided to delay a call with a caller by offering an answer holding function for an originating call when the line is busy. CONSTITUTION: If an originating call is generated, a mobile system asks the terminating MS(Mobile Station) through the terminating VLR what the terminating state is (S101). Then the system confirms whether the terminating state is an idle state(S102). If the terminating state is the idle state, the system receives calling subscriber information(S103) and activates an alerting timer(S104). Then the system confirms whether time is out(S105). If it is confirmed that time is out, the system executes no answer processing and informs the calling side of it(S106). Meanwhile, if a terminating answer is generated before time out, the system confirms whether the terminating answer is a direct call state or an answer holding state(S107). If the terminating answer is "*CODE+SEND"(S112), the system informs the VLR that the terminating MS is in the answer holding state(S113) and activates a timer to check an answer holding time(S114). Then the system sends an announcement to inform the calling side that the terminating MS is in the answer holding state(S115).

Description

Method for holding answer in a mobile communication system}

The present invention relates to answer holding in a mobile communication system, and in particular, provides a call holding function for an outgoing call during a call so that a call can be made later by delaying the call with the call (Alerting or Call Waiting state). The present invention relates to a method for holding a response in a mobile communication system.

In general, the answer hold function of a mobile communication system or a landline telephone system refers to a function that allows a called party to keep an incoming call in an answer state so that a call can be made later after the first answer.

Although the response hold function has been put to practical use in the existing public telephone network (PSTN), the response hold function is mentioned in the mobile communication network, but its specific methods and functions are currently being researched and developed.

Therefore, the present invention is proposed to implement a response hold function smoothly in a mobile communication network,

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for holding a response in a mobile communication system in which a call is made later by providing a call holding function for an outgoing call during a call and thus delaying a call with the calling (Alerting or Call Waiting state). .

The present invention for achieving the above object,

The hold function holder informs the other party (sender) of the hold status for a while due to other events. At this time, the announcement is sent to the other party (caller) for a while, so that the call is not answered and the call can be answered but the other party cannot be answered. In other words, by sending a message of the acknowledgment that does not respond immediately to the other party, it is possible to create a call hold state without making the other party feel uncomfortable.

1 is a block diagram showing the configuration of a mobile communication system to which the present invention is applied;

2 is a flow chart showing a response pending flow in the general call processing in the present invention,

3 is a flowchart illustrating a method for holding a response in a mobile communication system according to the present invention.

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

100, 100 '..... MS

200, 200 '..... base station (BS)

300 ..... Serving MSC

400 ..... Home Location Register

500 ..... Target MSC

Hereinafter, a preferred embodiment of the present invention according to the technical spirit as described above will be described in detail with reference to the accompanying drawings.

In order to successfully perform the response hold function in the present invention, the following basic matters must be preceded or satisfied with conditions.

1) Appropriate announcements should be provided to the calling party (as defined by the service provider) until the called party terminates the call on hold.

2) Answer hold The holder must press the "END" key to boil the call in response hold. And no answer should be processed to sender immediately.

3) In the state that the response hold function holder is activated in the response hold state during the alerting, the incoming call generally has to be broadcasted in the response hold state until the following operation is performed.

-Pending response until the subscriber presses "SEND" to recover the call,

Pending response until the subscriber presses "END" to release the calling party from the pending response,

-Until the calling party boils the connection.

4) In case of active call in answering state, call waiting (CW) processing should be available. (If you press "SEND" key, answer hold processing is terminated and other call is temporarily put on hold.) Connect the call pending subscriber to the caller in the call pending state).

5) When the response pending service is requested, the response pending state must be maintained for all handoff progress. At this time, the announcement broadcast should be controlled by anchorMSC, and when the progress is completed after the handover, the target MSC needs to inform the Anchor MSC of the request for response hold code. This information is transmitted by a message such as FLASHREQ.

6) When a call is closed for any reason, the answer pending state shall be automatically released.

7) Answer pending subscribers who are idle (Idle) or busy (busy) shall respond to an incoming call within the response pending response time set by the mobile station service provider.

8) The mobile station must press * code + SEND during alerting to place a response pending state. However, for the answer hold function, the called terminal should not be connected even if the terminal cover is opened.

9) Authorization for the response hold function is provided by the mobile service provider, and no individual can register or release the function, but must be able to activate it simultaneously with the authorization by the CDMA service provider.

10) Priority should be given to additional services Call Forwarding Busy (CFB).

11) A subscriber who is in response pending state cannot function transfer.

12) If a call is received from another terminal (or PSTN) while the incoming call is in answer pending state, the MSC treats the call as busy.

13) If the call waiting function is activated, it has priority over the answer hold function.

14) Calling Name Presentation (CNAP), Calling Name Identification Presentation (CNIP), and Password Call Access (PCA) add-on services must take precedence over the response hold function.

15) You cannot request a conference call in answer hold.

16) When a mobile station calls to a subscriber waiting for a priority channel, it must be handled as busy. If there is a busy transfer or active answer hold, the busy transfer should be handled.

When explaining the preferred embodiment of the present invention with reference to the above basic concept as follows.

1 is a block diagram illustrating a schematic configuration of a mobile communication system to which the present invention is applied.

Here, reference numerals 100 and 100 'denote mobile subscriber apparatuses which can be mounted on a vehicle or carried by a user to terminate a wireless line as a mobile station (MS).

Reference numerals 200 and 200 'denote base stations (BSs), which connect a wireless line with a wired network line, which can connect multiple mobile stations, and a wired network line digitizes a mobile communication switch and an analog signal. It is connected as a Pulse Code Modulation (PCM) channel, which is a method of modulating a pulse signal. It also consists of a control function that controls the connection of wired network lines and a transmission function that terminates the repair line.

In addition, reference numeral 300 denotes a Serving Mobile Switching Center (Serving MSC), which is currently in service, and a handover occurs when a mobile station is transferred to another mobile communication switch. It represents an exchange and is called an anchor in the first handover.

Reference numeral 400 denotes a home location register (HLR), which is a place where a called party is located, and is obliged to possess a response hold (AH) function. Have.

Reference numeral 500 denotes a target MSC (Target Mobile Switching Center). When the mobile station 100 moves to another mobile communication switch, a handover is performed. Refers to a mobile communication switch. If a call service is provided by the requested mobile exchange after handover, this mobile exchange is called serving.If the handover is made to another mobile exchange, this mobile exchange is called Tandem. MSC.

The mobile communication switch includes a mobile station signaling access (MSA) block for mobile station signaling access, a mobile call control (MCC) block for mobile call control, and a mobile call waiting (MCW) block for mobile call waiting.

The MSA block is the call processing block, which is the block closest to the base station. In other words, the call processing block is a block that first receives a message received from the base station, and lastly transmits a message to the base station. In addition, all the messages received in the bit pattern from the base station for the subscriber signal processing of the mobile communication exchange are checked whether the message conforms to the protocol format between the control station (BSC) and the mobile communication exchange (MSC). By converting the message into a higher software block, each of the upper blocks reduces the overhead of converting the received message, thereby providing a function of more efficiently performing mobile subscriber call processing. On the contrary, the mobile communication exchange converts an internal message into a message conforming to the protocol format between the mobile communication exchange and the control station and transmits the message to the base station.

The MCC block then controls the overall flow of outgoing and incoming calls for mobile subscribers.

In addition, the MCW block calls A when any subscriber C has a call waiting function holder when the subscribers A and B are busy. A call tone is sent to subscriber C, and a waiting tone is sent to subscriber A. After the call waiting tone is transmitted, subscriber A presses the Send key. Subscriber B is put on hold to receive the hold tone, and subscriber A and subscriber C are connected to make a normal call. During a call between subscriber A and subscriber C, subscriber A presses the Send key again. The subscriber C is a software block that sends out a pending sound, and adds an additional service that enables subscriber A and subscriber B to connect and make a call between subscriber A and subscriber B.

In the mobile communication system to which the present invention configured as described above is applied, the response hold function is registered in the home location register 400 by the CDMA service provider. In the case of batch registration, the home location register 400 processes the call holding block without registering the response hold function.

When the mobile station 100 connected to the initial service mobile communication switch 300 inputs a called number and presses the SEND key, a call signal is transmitted from the call control module of the base station 200 to the service mobile communication switch 300. The control station matching module in the service mobile communication switch 300 receiving the received signal transmits the call signal to the call processing module block. In the call processing module block, information about the originating subscriber and the information about the called party is determined in a database of a visitor location register (VLR) (not shown), and the subscriber home location register 400 is transmitted through a MAP message transmission. Check the calling / receiving subscriber information and the response hold status for the called subscriber.

The called subscriber exchange 500 is alerted to the called party, and when the called party responds with a response hold, the called mobile communication switch 500 transmits the announcement to the calling party.

If there is a handover during the exchange period, the processing is as follows. In case of handover in the alerting state, the service mobile communication switch 300 based on the internal algorithm selects whether the handover to the adjacent mobile communication switch 500 is appropriate. The service mobile communication exchange 300 sends a HANDMREQ signal to the selected mobile communication exchange 500 (the service mobile communication exchange may send several handover measurement requests to other mobile communication exchanges). The selected mobile communication switch 500 measures the position based on an internal algorithm, and transmits the result of the handmreq response to the service mobile communication switch 300. The service mobile switch 300 determines whether the current call should be handed over to the target mobile switch 500 or whether the target mobile switch 500 has a path ready for the call. The service mobile communication switch 300 sends a FACDIR signal to the target mobile communication switch 500. That is, the target mobile communication switch 500 is instructed to initiate the forward handover work. Since the voice channel of the designated target cell is useful, the target mobile switching center 500 increments the segment counter in the received BillingID variable by one and uses the new BillingID for the new call segment. It sends a facdir response to the requesting mobile communication exchange and initiates a forward handover operation. Upon receiving the facdir message, the service mobile communication switch 300 sends a hair handover request to the terminal to be serviced. After that, the terminal receives the designated voice channel. The target mobile communication switch 500 completes the voice path between the voice channel and the trunk of the mobile switching center, and the forward handover operation seconds to inform the requesting system that the target mobile switch 500 has successfully completed the handover forward date. Send a MSONCH message to the reporter (service mobile switching center). The service mobile communication exchange accepting the MSONCH connects the trunk communication channel during the mobile communication switching period to complete the handover process. The alerting is continued on the called terminal. The called terminal connects to the call with answer pending. The target mobile communication switch 500 sends the information to the FLASREQ in order to inform that the called terminal has responded in the form of response hold. The Anchor mobile exchange returns a flashreq response message. The target mobile communication switch 500 currently in service sends an ISANSWER message to the Anchor mobile switch. The Anchor mobile exchange that receives the ISANSWER message returns an isanswer message to the requesting mobile exchange. The Anchor mobile exchange responds to the call establishment message and the Anchor mobile exchange sends announcements to the calling terminal.

2 is a flowchart illustrating a process of performing a response hold function when processing a general call in the present invention.

First, when a call originates from mobile station MS1, it sends a LOCREQ message to home location register (HLR) with called subscriber information. The home location register (HLR) determines the current serving MSC for the destination mobile station (MS2) and sends ROUTREQ to the visitor location register (VLR) of the service system. The service visitor location register sends a ROUTREQ message to a service MSC. The Serving MSC then assigns a temporary number and sends it to the visitor location register, which sends a routreq to the home location register. The home location register returns the called number to the Originating mobile switch in locreq. In addition, Originating MSC establishes voice path to Serving MSC using TLDN. The service mobile communication exchange sends an alert message to the destination mobile station MS2. Incoming mobile station MS2 answers the call with answer pending operation (* code + SEND). Next, the serving MSC receives the response pending message, responds to the call setup message, and transmits an announcement to the calling mobile communication exchange. Meanwhile, the service mobile communication exchange connects a call when the incoming call transmits a call response message to the SEND, thereby making a call.

3 is a flowchart illustrating a method for holding a response in a mobile communication system according to the present invention.

As shown in the figure, a step (S101) (S102) (S121) of checking the incoming state in a state of requesting a called state to a called subscriber, and transmitting the call to the calling party if the incoming call is in the answer pending state. (S122) and if the incoming call is in an idle state (Idle state), receiving outgoing subscriber information, checking whether an incoming response occurs within a set time after operating the alert timer (S103 to S105), and checking If the incoming response does not occur within the result set time, and if the incoming response occurs within the set time (S106), and if the incoming response occurs within the set time to determine whether the incoming response is pending or direct call (S107), the determination If the incoming call response is SEND, switching to the call state and maintaining the call state until the end of the call (S108 to S111); If the answer is a response pending (* CODE + SEND), switch to the response pending state and inform the visitor location register that the response is in a pending state, and then operate a timer for checking a specified response hold time and send an announcement to the calling party (S112). S115), and if there is no response from the called party within the designated response holding time or if an "END" response occurs within the designated response holding time, releasing the call after announcement for call release (S116 to S119), and If a "SEND" response is generated from the called party within the response hold time, the call is switched to the call state, and the call state is maintained until the call ends (S120, S109 to S111).

In addition, when the incoming call is not in the IDLE state and the response pending state when the incoming call is requested, the present invention operates the alerting timer, and if there is no response within the operated alerting time, processes the answer as no response (S123 ~). (S125), and if the incoming response is within the alerting time, responding to the visitor location register to notify the visitor location register that the response is in a pending state and operating a timer for checking the response holding time, and then transmitting a guide broadcast for the pending response to the calling party (S126). S130), and if there is no "SEND" response within the response pending time, transmitting a guide broadcast for call release and releasing the call (S131 ~ S133), and if the "SEND" response occurs within the response pending time, , Switching the announcement and switching to a call state to maintain the call until the call ends (S134 to S137).

Here, if there is a previous caller before pressing "SEND" in step S131, the call is disconnected from the previous caller to "END" or a call is made and then "SEND" is pressed to make a call with the answer holder.

The "response withholding method in the mobile communication system" according to the present invention thus made first requests the incoming state from the called visitor location register to the called terminal when an outgoing call occurs in step S101.

Then, it is checked in step S102 whether the incoming call is in the IDLE state. If the incoming call is not in the IDLE state as a result of this checking, it is checked in step S121 whether the incoming call is in the response pending state. If the incoming call is in the answer pending state as a result of the confirmation, the process moves to step S122 and transmits the call to the calling party.

On the other hand, if the incoming call is in the IDLE state, the originating subscriber information is received in step S103, and the step S104 alerting timer is operated. Then, in step S105 it is checked whether or not the time out (Time Out), and if the result of the check timed out, in step S106 (No Answer) processing, and notifying the calling party.

In addition, when an incoming response occurs before the time-out while the alerting timer is operated, it is checked in step S107 whether the incoming response is a direct call or a response pending state. As a result of this check, when the called party answers the call by pressing the "SEND" key, the call is transferred to the call state, and the call state is maintained until the call is terminated while checking whether the call is terminated, and the call is released (S108 ~). S111).

Next, when the incoming response is a response pending, i.e., * CODE + "SEND" in step S112, the incoming call is notified to the visitor location register in step S113, and the timer for checking the response holding time is started in step S114. . In step S115, the announcement broadcast to inform the caller that the response is pending.

After transmitting the announcement, in step S116, it is checked whether the incoming responder responds. If there is no response within the response pending time, the announcement is transmitted to the calling party for release of the call and then the call is released (S117 to S118).

In addition, if a response is generated from the called subscriber within the response pending time, the response is confirmed in step S119. If the response is "END", the announcement broadcasts a call release and releases the call. When the incoming response is "SEND" to switch to the call state to make a call (S120 ~ S109). In the call state, it is checked whether the call is terminated, and when the call is terminated, the call is released (S110 to S111).

On the other hand, if the called party is not in the IDLE state and the response is not in the response pending state as a result of confirming the steps S102 and S121, the alert timer is operated in step S123. Then, it is checked whether the alerting timer has timed out (S124), and as a result, if no timeout occurs, no response processing is performed in step S125. On the contrary, if an incoming response occurs before the time-out, it is checked whether the incoming response is pending response (S126 to S127).

Thereafter, if the incoming response is not a response pending, the process returns to the step of checking whether or not the timeout occurs. In contrast, when the incoming response is a pending response, the visitor location register is notified to the visitor location register in step S128, and the response is received in step S129. Start the hold timer. In addition, in step S130, the announcement broadcast for the suspension of the response is transmitted to the calling party.

Next, it is checked whether a response is generated in step S131 with " SEND ", and as a result, if there is no response in " SEND " within the set response hold time, a guide broadcast for call release is sent and the call is released (S132 to S133).

In addition, if a "SEND" response occurs within the response hold time, the announcement is switched in step S134, and the call state is switched to step S135. Here, the previous caller who was in the call before the call is disconnected or "waited" is called. In step S136, it is checked whether the call is terminated. If the call is not terminated, the call state is maintained. If the call is terminated, the call is released in step S137.

In other words, if the incoming call is in a 2-Way busy state, the call is transferred to a call waiting state. That is, the caller is notified that the call is in tone. Only when the called party responds with the answer pending, the call waiting block is switched to the answer pending state, except in this case, the general call processing alerting state is heard, and the other party hears only the ringback tone. If the called party wants to connect the call to the caller who is on call waiting, press SEND during the call or cut the call to END with the busy party and press SEND to end the current announcement and talk to the caller. If the call is answered with timeout or END in answer pending state, the call is treated as no answer. In addition, if another call requires a call in call waiting state or answer hold state, the call is handled as busy state.

According to the above-described "holding method in the mobile communication system" according to the present invention, when a call arrives when the answer is on hold, the called party sends a guide broadcast to inform the other party of the pending state for a while due to other events, thereby feeling the other party's mood. This has the advantage of being able to perform a response hold function without being offensive.

In addition, by performing the response hold function in the mobile communication system, there is an advantage to improve the function of the mobile communication system.

Claims (5)

In the method of holding the response of the mobile communication system, Checking the incoming state in a state in which the incoming subscriber is requested to receive the incoming state, and if the incoming state is a response pending state, transmitting the incoming call to the calling party; If the incoming call is in an idle state (Idle state), determining whether the incoming call is a response hold or a direct call; Switching to a call state when the incoming call response is "SEND", and maintaining the call state until the call ends; If the incoming response is a response pending, switching to the response pending state and informing the visitor location register of the response pending state, operating a timer for checking a specified response pending time and transmitting an announcement to the calling party; If the "SEND" response from the called party within the response hold time, the call transition to the call state, and maintaining the call state until the end of the call comprises the response holding method in the mobile communication system. The method of claim 1, further comprising the step of releasing the call after announcement for the call release when there is no response from the called party within the designated response hold time or when the "END" response occurs within the designated response hold time. Answer holding method in a mobile communication system. The method of claim 1, wherein the called party indicates that the response is in a pending state by pressing * CODE + SEND key when the response is suspended. The method according to claim 1, wherein if the incoming call is not in the IDLE state and the response pending state in the state where the incoming call is requested, the alert timer is operated, and if there is no response within the operated alert time, the response is processed as no response. Wow; Informing the visitor location register that the response is in a pending state and operating a timer for checking the response pending time if the incoming response is in the pending state within the alerting time, and transmitting an announcement to the calling party to the calling party; If there is no "SEND" response within the response pending time, transmitting a guide broadcast for call release and releasing the call; If the "SEND" response occurs within the response holding time, the method further comprises the step of switching the announcement broadcast, the call state to maintain the call until the end of the call characterized in that the mobile communication system. 5. The method of claim 4, wherein if there is a previous caller before pressing the “SEND”, the call is disconnected from the previous caller to “END” or the call is made and then the call is held by pressing “SEND”. Answer holding method in a mobile communication system.