KR20010027383A - Method for processing call in a mobile communication system - Google Patents

Abstract

The basic call processing method of the mobile communication system adjusts the priority level to the level corresponding to the emergency call when the call of the originating subscriber is an emergency call, and then transmits the priority level value when transmitting a channel allocation request message to the BSC. Therefore, the priority of calls used by subscriber's urgent request is adjusted to enable subscribers to service the traffic channel. Also, the subscribers are notified that the call is held due to the lack of current traffic channel. By noting that, by repeatedly pressing the END key and the SEND key of the terminal it is not necessary to access the base station resources unnecessarily to provide a better service in terms of subscriber services.

Description

Basic call processing method in mobile communication system {Method for processing call in a mobile communication system}

The present invention relates to a method of processing a basic call in a mobile communication system. In particular, when a call is connected, the subscriber is notified of the reason for call rejection, thereby providing a better service at the subscriber level. The basic call processing method of the system.

1 is a block diagram showing an entire network connection to a general mobile communication system, wherein a mobile station 10 (hereinafter referred to as an MS), which is a mobile communication terminal, and a base station connected to the MS 10 wirelessly 20) (Base Station Transceiver: hereinafter referred to as BTS), and the control station 30 that manages the BTS 20 and processes the traffic received from the BTS 20 (Base Station Controller: hereinafter referred to as BSC) And a switching center 40 (Mobile Switching Center: hereinafter referred to as MSC) that connects a call path to a desired destination of a mobile subscriber, and a VLR (Visited Location Resister) 50 which processes subscriber information roamed to the MSC 40. It consists of.

The MSC 40 includes an Access Switching Subsystem (ASS) having subscriber and relay line matching functions and distributed call processing, a Central Control Subsystem (CCS) having system control, operation, and maintenance functions, and an ASS between CCS and ASS. It is composed of INS (Interconnection Network Subsystem) that provides the interwiring function. Here, the MSC 40 is composed of one INS and CCS and up to 32 ASSs to perform exchange functions of up to 35,000 mobile subscribers.

The main modules of the ASS of the MSC 40 include ASS-S for general wired subscribers and various signals, ASS-T for trunk matching with other networks, ASS-M for accessing the base station of the mobile subscriber, and MSC (40). No.7 signaling for ASS-7 and ASS-V / F for matching with Voice / Fax Mail system for a wide range of data services such as ISDN.

As shown in FIG. 2, the MSC 40 includes an access switching processor (ASP) that manages the operation and maintenance of the ASS.

In addition, the call processing related processor of the BSC 30 is a call control processor (CCP), and the call processing processor loaded in the processor is a call control execution (CCOX). The call processing processor loaded in the ASS-M includes a processor related to MSA (Mobile Signaling Access), MCC (Mobile Call Cotrol), and various additional services.

FIG. 2 is a diagram showing in detail the connection configuration between the control station and the switching station shown in FIG. 1. Referring to FIG. 2, a connection switching processor 41 (hereinafter referred to as an ASP) is included in the ASS-M of the MSC 40. The BSC 30 is a subsystem that controls the entire BSC 30, and the call processing processor 33 (hereinafter referred to as CCP) that performs tasks such as resource management and allocation, call processing control and maintenance, Located between the BTS 20 and the MSC 40, under the control of the CCP 33, the setting of the vocoder corresponding to the channel element of the BTS 20, the conversion of packet data and PCM data, and the converted voice information Exchange of packets between the TSB 32 (Transcoder Selecter Bank) and the subsystems in the BSC 30 and the call channel connection between the BTS 20 and the TSB 32, which perform transmission and reception, handoff support, and power control functions. It consists of a CIN 31 to perform.

The TSB 32 is composed of an interface assembly (hereinafter referred to as IA) and a plurality of vocoding units (hereinafter referred to as OA). The IA is an OA polling and CCP 33. It handles the response to the query from the OA, and provides the voice channel, performs the call processing, performs the handoff, selects the frame, and performs the reverse / forward power control.

Referring to FIG. 2, the call processing processor of the MSC 40 and the BSC 30 performs No. 7 communication through E1, and the traffic channel data received from the actual mobile station 10 is in the form of 64kbps in the OA. The converted traffic channel data is transferred to DT1 / ET1 (T1 / E1 Interface) of the ASP 41.

The OA resources are allocated in IA, each OA channel is allocated per call, and the role of assigning OA and converting traffic channel data to 64K is handled in SVPX in OA.

A basic call processing method according to the prior art using the mobile communication system configured as described above will be described with reference to FIG. 3.

3 is a diagram illustrating a flow of basic call processing in a mobile communication system according to the prior art.

First, when an origination message (Origination Msg) is transmitted from the MS 10, the BS (20, 30) is loaded with the information such as the calling number, called number required for the call in the call setup request message (CM_Svc_Req) MSC 40 to the MSA.

The MSA receives the call request message sent from the BS 20 and 30 and delivers an SCCP Connection Confirm message (CC) to the BS 20 and 30 for the received call request message. At this time, since IS-634 uses the No. 7 protocol between the BSC 30 and the MSC 40, one SCCP connection is maintained per call.

Subsequently, the BSs 20 and 30 load information necessary for transmission not transmitted in the CM_Svc_Req message in the Setup message according to the SCCP access confirmation message transmitted from the MSA to the MSA.

Subsequently, the MSA transfers the Setup_IC message, which is information required among the messages received from the CM_Svc_Req and the Setup, to the MCC, the call signal processing block, and the MCC receiving the Setup_IC message generates a child process, and then whether or not the call proceeds. Send Call_Proc message to MSA to send.

Subsequently, the MCA sends a Call Proceeding message indicating whether the call proceeds to the BSC 30 according to the Call_Proc message transmitted from the MCC, and then assigns a traffic channel to the MS 10 to the BSC (30). To pass). At this time, the Assignment Req message is also delivered with the CIC for voice information transfer between the BSC 30 and the MSC (40).

Accordingly, the BSC 30 sends the traffic channel assignment message Assignment Msg to the MS 10 to allocate the traffic channel. After allocating a channel of the MS 10, the device transmits an Assignment Com, which is information that channel allocation is completed, to the MSC 40.

Subsequently, after receiving the Assignment Com message, the MSC 40 transmits an InfoOGsetup message to the VLR 50 requesting outgoing subscriber information for receiving the outgoing subscriber information from the VLR 50.

When the InfoOGsetup message requesting the originating subscriber information transmitted from the MSC 40 is received, the VLR 50 transmits the corresponding originating subscriber information to the MCC by placing the corresponding outgoing subscriber information in the InfoOGSetupAck message, and the MCC receiving the originating subscriber information is the subscriber. Sends an Enbloc message to the VLR 50 for the number translation request. Since the following flow is the same as the basic call flow, the description thereof is omitted.

As a result, the basic call processing method in the mobile communication system according to the prior art brings out the calling subscriber information after allocating a traffic channel. Since the originating subscriber information is also received with a Priority Access Channel Assignment (PACA) level for the subscriber, it is impossible to perform the PACA function through the conventional basic call flow described above. Therefore, if there is no traffic channel in the wireless standard before IS-95B, the terminal continuously redials or the subscriber continuously redials with the SEND key, and the call proceeds due to the cause of the actual network, or traffic in the BTS 20. There is a problem that can not distinguish whether the call is rejected due to lack of channels.

Here, the PACA function is a function for the subscriber to have priority over voice or traffic channels when attempting to make a call. If there is no traffic channel, first, the subscriber is queued to provide a service when the traffic channel is available according to the priority. The queued subscriber is to provide services to First Come First Serve and Priority Base. The higher the priority level is "1", the lower the number, the lower the priority level.

In addition, the PACA implementation is determined by one of two options, namely, demand and permanent. In the case of demand, the authorized subscriber brings the capability level to the feature code. In the case of a permanent, the subscriber can always use the priority when the subscriber attempts to make the call.

Accordingly, the present invention has been made to solve the above problems according to the prior art, an object of the present invention is to use the PACA function when there is no traffic channel when the subscriber attempts to make a call during the basic call processing of the mobile communication system. The present invention provides a basic call processing method of a mobile communication system in which a subscriber is informed that a call is not made due to a lack of traffic channels so that a better service can be provided in terms of subscriber service.

A feature of a basic call processing method of a mobile communication system according to the present invention for achieving the above object is that a basic call processing method of a mobile communication system having an exchange station and a control station including an MSA occurs when a subscriber originates. Receiving the registered subscriber information; Checking a priority level of a call included in the received subscriber information, and then checking an outgoing call; If the checked call is an emergency call, adjusting the priority level to a priority level corresponding to a preset emergency call; Sending a call progress message including a priority level corresponding to the adjusted emergency call to the MSA of the switching center; And allocating a traffic channel to the terminal of the subscriber that has sent the emergency call by transmitting a channel assignment request message to the control station according to the call progress message including the priority level.

In addition, according to another aspect of the present invention, if the originating call is not an emergency call such as a special number, an outgoing call, a stolen terminal, or a non-paying terminal in the step of checking the outgoing call, a tone or announcement broadcast is processed to the corresponding terminal after allocating a channel. It is in a ship.

1 is a block diagram of an entire network for a general mobile communication system;

2 is a view showing in detail the connection configuration between the control station and the switching station shown in FIG.

3 is a view showing a flow for basic call processing in a mobile communication system according to the prior art;

4 is a view showing a flow for basic call processing in a mobile communication system according to the present invention;

5 is a flowchart illustrating an operation of a basic call processing method in a mobile communication system according to the present invention;

<Explanation of symbols for main parts of drawing>

10: mobile station 20: base station

30 control station 31 matching unit

32: TSB 40: exchange office

41: connection switching processor 50: VLR

Hereinafter, a preferred embodiment of a basic call processing method of a mobile communication system according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a diagram illustrating a flow for basic call processing in a mobile communication system according to the prior art.

First, when the origination message (Origination Msg) is transmitted from the MS 10, the BS (20, 30) is loaded with the information such as the calling number, called number required for the calling signal to the calling signal setting request message (CM_Svc_Req) MSC 40 to the MSA.

The MSA receives the call request message sent from the BS 20 and 30 and delivers an SCCP Connection Confirm message (CC) to the BS 20 and 30 for the received call request message. At this time, since IS-634 uses the No. 7 protocol between the BSC 30 and the MSC 40, one SCCP connection is maintained per call.

Subsequently, the BSs 20 and 30 load information necessary for transmission not transmitted in the CM_Svc_Req message in the Setup message according to the SCCP access confirmation message transmitted from the MSA to the MSA.

Subsequently, the MSA transfers the Setup_IC message, which is necessary information among the messages received from the CM_Svc_Req and the Setup, to the MCC, the call signal processing block, and the MCC receiving the Setup_IC message generates a child process.

Subsequently, the MCC transmits an InfoOGsetup message requesting the originating subscriber information for receiving the originating subscriber information from the VLR 50 to the VLR 50, and an InfoOGsetup message requesting the originating subscriber information transmitted from the MSC 40. Is received, the VLR 50 sends the corresponding outgoing subscriber information in the InfoOGSetupAck message to the MCC. At this time, the subscriber information includes the PACA level.

Subsequently, the MCC forwards the Call_Proc message to the MSA in order to convey the call progress, and the MCA forwards the Call Proceeding message indicating whether the call proceeds to the BSC 30 according to the Call_Proc message transmitted from the MCC, and then the MS. In step 10, the system transmits an Assignment Req message, which is a request message for allocating a traffic channel, to the BSC 30. At this time, the Assignment Req message is also delivered with the CIC for voice information transfer between the BSC 30 and the MSC (40).

Accordingly, the BSC 30 sends the traffic channel assignment message Assignment Msg to the MS 10 to allocate the traffic channel. After allocating a channel of the MS 10, the device transmits an Assignment Com, which is information that channel allocation is completed, to the MSC 40.

Subsequently, after the MSC 40 receives the Assignment Com message, the MCC transmits an Enbloc message for the number translation request dialed by the subscriber to the VLR 50. Since the following flow is the same as the basic call flow, the description thereof is omitted.

That is, the InfoOGSetupAck gets the PACA level for the subscriber and delivers the level to the Assignment Req. However, if the number sent by the subscriber is prohibited from calling, it is checked whether it is a special number (eg 112), and if it is a special number, the priority level may be designated and transmitted to the assignment req.

However, if InfoOGSetupAck is not a special number but a call-out, stolen or unscheduled terminal, the subscriber should be informed of the tone or announcement, but in the above flow, the tone or announcement is not available until the traffic channel is assigned. I can't tell you. Therefore, in case of tone or announcement, the tone or announcement is processed after allocating a traffic channel.

The basic call processing method of the mobile communication system according to the present invention will be described step by step with reference to FIG.

5 is a flowchart illustrating an operation of a basic call processing method of a mobile communication system according to the present invention.

First, the reception of the Setup_IC message in the MCC (S101).

Subsequently, it is determined whether the Setup_IC message transmitted from the MSA has been received (S102), and upon receiving the Setup_IC message, the MCC starts a child process (S103).

Subsequently, after starting the child process, the MCC transmits an InfoOGSetup message to the VLR 50 (S104), and waits to receive a subscriber inquiry (S105). That is, it waits to receive an InfoOGSetupAck message for an InfoOGSetup message from the VLR 50.

Subsequently, it is determined whether the InfoOGSetupAck message is received from the VLR 50 in the standby state (S106). If the InfoOGSetupAck message is received from the VLR 50, the Call_Proc message is transmitted to the MSA (S107). It is determined whether the call message is an emergency call (S108). At this time, the InfoOGSetupAck message includes the PACA level, that is, the priority level.

As a result of the determination, when the call is an emergency call, the received priority level is adjusted to a priority level corresponding to a preset emergency call (S109), and then an Assignment_Req message included in the adjusted priority level is transmitted to the BCS 30 ( S110).

However, if the call is not an emergency call in step S108, the Assignment_Req message including the received priority level is transmitted to the BSC 30 (S112).

Therefore, it is possible to provide a traffic channel service to the terminal (S111). That is, when the call is an emergency call, the service is allocated by first assigning a traffic channel to the corresponding terminal according to the priority level.

As a result, in the basic call processing method of the mobile communication system according to the present invention, when the subscriber makes a call, after receiving the calling subscriber information, the priority level is checked and the confirmed priority level value is transmitted to the MSA as Call_Proc. However, if the call is an emergency call, the priority level is adjusted to a class corresponding to the emergency call, and then the priority level value is transmitted when the assignment request is transmitted to the BSC 30. In this way, the priority of the call used by the subscriber's urgent request is adjusted to enable the subscriber to service the traffic channel.

In addition, this service does not require subscribers to access base station resources unnecessarily by repeatedly pressing the END and SEND keys of the terminal because the subscriber knows that the call is being held due to a lack of a traffic channel.

In the basic call processing method of the mobile communication system according to the present invention as described above, when the call of the originating subscriber is an emergency call, after adjusting the priority level to a level corresponding to the emergency call, the priority level value is transmitted when transmitting an Assignment Req to the BSC. By adjusting the priority of the call used by the subscriber's urgent request, it is possible to provide the subscriber with the service on the traffic channel.

In addition, since the subscriber knows that the call is being held due to lack of traffic channel, the subscriber service does not need to repeatedly access the base station resources by repeatedly pressing the END and SEND keys of the terminal. There are other benefits that can provide better service in terms of dimensions.

Claims (3)

In a basic call processing method of a mobile communication system having an exchange station and a control station including an MSA, Receiving subscriber information generated when a subscriber originates; Checking a priority level of a call included in the received subscriber information, and then checking an outgoing call; If the checked call is an emergency call, adjusting the priority level to a priority level corresponding to a preset emergency call; Sending a call progress message including a priority level corresponding to the coordinated emergency call to the MSA of the switching center; A basic call of a mobile communication system, comprising: assigning a traffic channel to a terminal of a corresponding subscriber that has made an emergency call by transmitting a channel assignment request message to a control station according to a call progress message including the priority level Treatment method. The method of claim 1, The highest level value of the priority level is " 1 ", and the larger the number, the lower the priority level. The method of claim 1, In the step of checking the outgoing call, if the outgoing call is not an emergency call such as a special number, outgoing call, theft terminal, or a non-payment terminal, after assigning a channel, a tone or announcement broadcast is processed to the corresponding terminal. How to handle basic calls.