KR100282569B1 - Pending call handling method in mobile asynchronous delivery virtual channel exchange - Google Patents

Abstract

The present invention relates to a method for handling a held call in a mobile asynchronous transfer type virtual channel exchange. When a subscriber requests to hold a call while a subscriber is performing a call with a subscriber, the subscriber may perform a hold call processing service. After confirming whether the subscriber is able to perform the hold call processing service, if the subscriber is able to perform the hold call processing service, the current busy line is disconnected until the call resume message is received from the subscriber, and the subscriber broadcasts the announcement and melody of the call on hold. When receiving the call resumption message from the subscriber, after checking the presence of resources in the call, the call is resumed by controlling the melody transmitted to the other subscriber and resetting the call path.

Description

Pending call handling method in mobile asynchronous delivery virtual channel exchange

The present invention relates to a held call processing method in an exchange (hereinafter, referred to as a mobile ATM VC) using a virtual channel in a mobile asynchronous delivery scheme. In particular, a call held between the ATM VC switch and a base station controller or an ATM VC switch and a subscriber information device. It relates to a treatment method.

The mobile asynchronous delivery type virtual channel exchanger is designed to provide mobile call services to mobile subscribers. A protocol for this is designed. The structure of the mobile asynchronous delivery type virtual channel exchange and the processing flow of the mobile call processing message are shown in the figure. Referring to the following.

1 is a block diagram illustrating a mobile ATM VC switch to which the present invention is applied. Referring to FIG. 1, a mobile ATM VC switch detects a call request from a subscriber and a relay line and performs a call service. An ATM Local Switching Subsystem (150) and an Central Switching Subsystem (ACS) 140 that performs an interconnection function between the ALS 150, and the ALS 150 includes an ACS (ACS). 140 can be operated as a concentrator having a constant concentrating ratio.

In the mobile ATM VC switch having the above configuration, when the calling party ALS requests the translation or routing of the called party to the ACS 140 after the station number is translated by the request of the subscriber and the relay line, the ACS 140 receives the called party ALS. The designated destination ALS selects an optimal route and notifies the originating ALS. The calling ALS then establishes a call path by that route.

In this way, when the called party and the calling party are connected to each other and are in a busy state, the calling party ALS counts the cells transmitted during the call and sends the billing data to the ACS together with the user's requested service type after completing the call. Incoming ALS restores call data to a dormant state.

Meanwhile, a base station controller (BSC) 120 is connected to a subscriber interface interface (SIM) in the ALS 150, and a subscriber information device (TIM) is connected to a trunk interface module (TIM). A Home Location Register (HLR) 130 is connected, so that the BSC 120 handles connection matching by a mobile subscriber's radio and call control processing with a mobile ATM VC switch, and the HLR 130 moves. Register / cancel / change information on subscriber.

A flow for processing a mobile call processing protocol message in the mobile ATM VC exchange configured as described above is shown in FIG. 2.

2 is a flowchart illustrating a mobile call processing protocol message to which the present invention is applied. Referring to FIG. 2, the processing of the mobile call processing protocol message is performed by an originating base station controller (BSC _O ) 121 and an originating subscriber matching block. 10, between the called party subscriber matching block 20, the called base station controller (BSC _t ) 122 and the subscriber information device (HLR) 131, wherein the BSC _O 121 is called from any terminal. Upon receiving the request, the BSC _O 121 requests 201 a setup to the calling party subscriber matching block 10, and the calling party subscriber matching block 10 performs an HLR to perform an authentication procedure for that subscriber. 131 requests the subscriber authentication information (202) to receive the subscriber authentication information (203), sends a message containing the subscriber authentication information to the BSC _O 121 (204) to receive the authentication result (205) )do.

If the authentication result is normal, in order to perform call processing, a bearer channel (virtual channel) is first connected with the calling party subscriber during the exchange period. The process is as follows.

First, the calling party subscriber matching block 10 instructs the BSC _O 121 to perform encryption on a wireless section for connecting the call channel later (206), and temporarily prevents location leakage of the terminal. Instructing to assign the number (TMUI) (207) to receive a message indicating the completion of the temporary number (TMUI) allocation from the BSC _O 121 (208), the terminal connection (TA-CONNECT) indicating that the terminal use is legal Send the message to BSC _O 121 (209).

In addition, when receiving a message requesting call setup from the BSC _O 121 (210), it inquires (211) the calling party's grade to the HLR 131 to check whether the subscriber is a call settable grade ( 212) and, if the set-up available grade rating of the subscriber call number processing to a BSC _O (121) (call Proc) and then transmitted (213) the message, a message for setting up a bearer channel to the BSC _O (121) and exchanges 214 is sent to the BSC _O 121 and the response is received 215, thereby connecting the bearer channel with the calling subscriber in the exchange period.

In this way, when the calling party and the exchange bearer channel are connected, the calling party performs the authentication process for the called party requesting the call setup. The calling party matching block 10 first goes to the HLR 131. The roaming number of the called party is queried (216) and the ALS of the called party is determined by the roaming number 217, which is a response. When the ALS of the called party is determined, the called party matching block 20 determines the called party's ALS. Send 218 a Setup_U message.

Then, the called party subscriber matching block 20 sends a paging message 219 to the BSCt 122 and receives 220 the response of the called terminal by the BSCt 122 and then sends the called party subscriber to the called party subscriber. In order to perform the authentication procedure, the HLR 131 requests the subscriber authentication information for the called party subscriber (221), receives the subscriber authentication information in response thereto (222), and sends a message including the subscriber authentication information. It transmits to the BSCt 122 (223) and receives the authentication result (224).

When the authentication procedure for the called subscriber is performed as described above, it is checked whether the called subscriber can be received and connects the bearer channel between the exchange and the called subscriber. First, the called subscriber matching block 20 is a BSCt 122. ) Instructs to perform encryption on the radio section for connecting the call channel in the future (225), and instructs (226) to allocate a temporary number (TMUI) for preventing the location leakage of the terminal (BSCt 122). When receiving a message indicating the completion of the temporary number (TMUI) allocation from the (227), the inquiry to the class of the called party subscriber to the HLR (131) (228) to determine whether the subscriber is a call setup available class (229), If the class of call setup is a class capable of call setup, the BSCt 122 transmits a setup message 230.

In addition, a call procedure message is received from the called terminal (231), and the call procedure (CALL_PROCEEDING) message is transmitted to the calling subscriber matching block 10 (232), while the called subscriber is connected to the called subscriber and the ATM VC exchange. A bearer setup message 233 is sent to establish a bearer (virtual channel), and a bearer setup comp message 234 is received in response.

As such, when the bearer channel is connected with the called subscriber in the exchange period, the BSCt 122 receives an alert message from the called terminal and transmits it to the called subscriber matching block 20 (235). The subscriber matching block 10 is passed 236 to the calling BSCo 121 237.

When the BSCt 122 receives a CONN message from the called terminal, the BSCt 122 transmits the connected CONN message to the called subscriber matching block 20 (238), and the called subscriber matching block 20 receives the CONN message. The connection (CONN) message is transmitted (239) to the calling party subscriber matching block 10, while the acknowledgment message for the connection message (240) to the BSCt (122).

In addition, the originating subscriber matching block 10 receiving the connection message forwards the connection (CONN) message to the calling BSCo 121 (241), and the calling party BSCo 121 is the calling party subscriber matching block. The connection acknowledgment message (CONN ACK) 242 is transmitted to (10).

When the call is connected in this way, the called party and the calling party make a mutual call 243 by the call. At this time, there is no message transmitted from the calling party subscriber matching block 10 to the called party subscriber matching block 20, and the call state is maintained until a release message is received from the called party terminal.

When the BSCt 122 receives a release message from the called terminal, the BSCt 122 transmits the message to the called subscriber matching block 20 (244), and the called subscriber matching block ( 20) sends a Release Comp message to the called terminal (245), and sends a release message to the calling party matching block 10 (246), and the calling party matching block 10 After transmitting the release message 247 to the BSCo 121, a Release Comp message is received from the BSCo 121 (248). At this time, the called party subscriber matching block 20 sends a call disconnect request message to the HLR 131 and receives a call disconnection response message 250 from the HLR 131 to release the call of the called party.

When the call is released as described above, the terminal and the bearer channel of the called party are released, and the called party matching block 20 sends a terminal release message (TA-Release) to the BSCt 122 (251), and then the virtual. When a bearer release message for channel release is transmitted 252 and a bearer release message is received from the BSCt 122 253, a UE release message is transmitted 254 to the HLR 131. The mobile subscriber station completes the incoming call by receiving the terminal release complete message (255).

Meanwhile, when the calling party subscriber matching unit 10 requests 256 the call release to the BSCo 121 and receives the release completion signal 257 for it, the calling subscriber matching unit 10 sends a call disconnect request message to the HLR 131 (258). When receiving the call disconnection response message 259, the terminal release message 260 and the bearer release message for the virtual channel release are transmitted to the BSCo 121 and then the bearer is released from the BSCo 121. Receiving a completion message (262), sending (263) the originating terminal release message to the HLR (131) and receiving a terminal release complete message (264), thereby completing the mobile subscriber station originating signal.

In such a mobile ATM VC exchange, mobile call processing is performed as described above, but there is no protocol for mobile pending call.

Therefore, in the present invention, while designing a protocol for mobile hold call processing by applying protocol messages such as mobile call hold, hold complete, hold rejection, resume, resume complete, resume rejection, etc. to the internal call processing protocol processing of the mobile ATM VC exchange system, By designing independently of the protocol of the mobile ATM VC switch, it is intended to provide a compatible standardized interface that is not dependent on the type of the base station controller and the subscriber information device.

In addition, regardless of the type of call (incoming call, incoming call), a variety of services are provided to exchange users by providing a service that allows users to temporarily hold a call or make a new call and alternately call two or more calls during a call. For the purpose of

In order to achieve the above object, the pending call processing method provided by the present invention is a subscriber who can perform a hold call processing service when any subscriber requests to hold the call while performing a call with one subscriber. After confirming whether the subscriber is able to perform the hold call processing service, if the subscriber is able to perform the call resumption message from the subscriber, the current call is disconnected and the subscriber broadcasts the announcement and melody of the call pending until the subscriber resumes the call. Receiving a call resume message from the call after checking the presence of resources, characterized in that to resume the call by controlling the melody transmitted to the other subscriber and resetting the call path.

1 is a block diagram illustrating a mobile ATM VC switch to which the present invention is applied;

2 is a flowchart illustrating a mobile call processing protocol message to which the present invention is applied;

3 is a processing flowchart for mobile reserved call control to which the present invention is applied;

4 is a process flow diagram for a mobile pending call processing protocol message according to an embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

10: calling party subscriber matching block 20: called party subscriber matching block

120,121,122,123,124: base station controller (BSC)

130,131: subscriber information device (HLR) 140: ACS

150: ALS

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

3 is a flowchart illustrating a mobile reserved call control to which the present invention is applied, and FIG. 4 is a flowchart illustrating a mobile reserved call processing protocol message according to an embodiment of the present invention.

Referring to FIG. 3, the method for controlling mobile hold call control according to the present invention can be serviced only when a mobile call is in a call state, and after the subscriber subscribes to the mobile waiting call service in advance, the subscriber information is transmitted to the subscriber information device (HLR). It must be stored.

Referring to FIG. 3, first, when a subscriber matching block receives a call hold request message from a counterpart subscriber during a call with another subscriber (301), the subscriber matching block sends a call hold request message to the subscriber information device (HLR). Transmits and transmits the state to the message transmission and call waiting state 302, and then performs the call waiting state 303, and maintains the call state. At this time, the subscriber registration block receiving the call hold request message may receive two cases of messages from the HLR, which is the case of call hold permission confirmation and call hold rejection.

First, when the call hold permission is confirmed, when the call hold service execution message is received 304 from the HLR in the call hold state 303, the call hold confirmation message is transmitted to the other mobile subscriber who requested the call hold. After sending the mobile subscriber call hold service execution message and transitioning to the corresponding call on hold state (305), the current call is disconnected, the resources for that call are released for use by another subscriber, and the call is held to the other subscriber. The call hold 307 is maintained by sending 306 a melody along with an announcement to the user.

On the other hand, when the call is rejected with respect to the call, in the call waiting state 303, when receiving the call rejection message from the HLR (308), the mobile subscriber call call rejection message is sent to the other subscriber (309) and then The call is returned to the call state to maintain 310 the previous call.

In addition, after the call pending state 307, when the call-holding mobile subscriber receives 311 a call resumption request message from the counterpart subscriber who has requested the call holding, the mobile call can be confirmed that the mobile call is in the call-hold state and assigned to the mobile subscriber. After confirming (312) whether a valid call path is secured, if a call path is secured, a call resumption confirmation message is sent to the previous call counter subscriber, and a pending call is transferred to the other party at the same time (313). It provides the service to re-call with the previous subscriber by intercepting the melody and reconnecting the call path (314).

If it is difficult to secure the call as a result of the check 312, after the call resume rejection message to the mobile subscriber (315), the call hold is maintained.

4 is a flowchart illustrating a specific protocol message for the call hold process, when the terminal controlled by the BSCo 121 and the terminal controlled by the BSCt 122 are in communication with the BSCo 121. As an example of a case where a terminal controlled by the terminal receives a call hold request, referring to FIG. 4, when the BSCo 121 receives a call hold request from a subscriber during a call 401, a corresponding call subscriber matching block ( 10, if the request is held (HoldRQ) 402, the originating subscriber matching block 10 transmits the call hold request message (HOLDRQ) to the subscriber information device (HLR) (131) (403) and the HLR (131) Receives a call hold confirmation message (HOLDRP) from the 404 and transmits a call hold confirmation message (HoldACK) to the mobile subscriber through the BSCo 121 (405) while cutting into a call and sending announcements and melody to the other subscriber The arc hold 406 is thereby maintained.

In the call pending state 406, if the mobile subscriber in call is requested to resume call (Resume RQ) 407, the channel is secured and the call resume confirmation message (ResumeACK) is transmitted, and the melody is controlled. Reconnect the channel to maintain the busy state (409).

If the mobile subscriber requests the call hold (HoldRQ) again 410 during the call, the calling subscriber matching block 10 transmits the call hold permission request message HOLDRQ to the subscriber information device (HLR) 131 ( 411) and receiving a call hold permission rejection message (HOLDREJ) from the HLR 131 (412), the subscriber registration block 10 transmits a call hold rejection message (HoldREJ) to the mobile subscriber (413) and the busy state (414) Keep).

In addition, when the call subscriber 406 receives the message (ResumeRQ) requesting to resume a call when the call is suspended (406), but fails to secure a call path for re-call, a call rejection message (ResumeREJ). Transmit 416 and remain on call hold.

The present invention has the effect of providing a variety of services to mobile subscribers by adding a reserved call service to the mobile basic call processing of the mobile ATM VC switch. Any subscriber can put a call on hold and resume the call, and can make a new call while the call is on hold. In addition, it is possible to hold several calls at the same time, and provide the service of alternately recalling and holding these hold calls, and using the mobile ATM VC exchange mobile call hold processing protocol which is independent of the mobile ATM VC exchange protocol. By providing, there is an effect of providing a compatible standardized interface that is not dependent on the type of the base station controller and the information apparatus.

Claims (3)

In a call processing method of a mobile asynchronous delivery virtual channel switch, When any subscriber in a call requests a call hold, the first step of the subscriber requesting the call hold permission for the subscriber to the information providing device; A second step of, when the subscriber matching block receives the call hold permission confirmation message from the information providing apparatus, sends a call hold confirmation message to the base station controller controlling the subscriber and maintains the call hold state; A third step of confirming whether the subscriber matching block has a call path allocated to the subscriber after receiving a call resumption request message from the pending subscriber; And a fourth process of transmitting a call resumption confirmation message to a base station controller controlling the subscriber and restoring to a call state when a call path that can be allocated to the subscriber who has transmitted the call resumption request message is secured as a result of the confirmation. A method for handling a held call in a mobile asynchronous delivery virtual channel exchange. The method of claim 1, wherein the second process When a call hold permission rejection message is received from the information providing device, a call hold rejection message is sent to the base station controller controlling the subscriber to reject the call hold and maintain the previous call state. A method of handling a held call at the channel exchange. The method of claim 1, wherein the fourth process If a call path that cannot be allocated to the subscriber who sent the call resumption request message is not secured as a result of the checking of the third process, a call resume rejection message is transmitted to the base station controller. A method for handling a held call in a mobile asynchronous transfer type virtual channel exchange, characterized by maintaining a call held state.