KR101058942B1 - Call processing method and device using prefix - Google Patents

Abstract

Disclosed are a call processing method and apparatus using a prefix. A call processing method using a prefix includes: (a) requesting location information of the called terminal to a target home location register; (b) receiving a response signal corresponding to the request for a designated time; (c) if the response signal is not received during the designated time, sending an initial address message to another network exchange. The present invention has the effect of providing a call processing method and apparatus using a prefix.

Prefix, Call Processing, Exchange, Home Locator

Description

Apparatus and method for call processing using pre fix}

The present invention relates to a call processing method and apparatus, and more particularly to a call processing method and apparatus according to the prefix.

In the mobile communication system, it is possible to perform a voice call or data communication with the counterpart while moving to an arbitrary area according to the needs of the user of the mobile communication terminal. This is the location of each mobile communication terminal by mutual communication with an exchange that manages the communication area of the current location of each mobile communication terminal, and a home location register that stores information of the terminal subscribers who have subscribed to the mobile communication service and the location information of the terminal. It is confirmed that the handoff is possible in the call connection and call connection state.

In such a mobile communication system, a communication service is provided between an originating terminal of an own network subscriber and a destination terminal of another network subscriber through mutual communication from the own network to the other network. Typically, a network switch uses a MAP message according to the local (LOCAL) prefix to access its home location register. That is, the local prefix performs the MAP call processing by determining the called user as its own subscriber. For example, if the prefix is local, the originating terminal sends a call request signal to the own network switch, and the network switch sends a called subscriber location request signal to the own network home location register according to the call request. The home network location register sends a response to the incoming subscriber location to the home network switch.

In addition, when the called party is the other subscriber, the own network switch inquires the location of the called party's terminal to the other network using the ISUP message according to the TOLL prefix. For example, the originating terminal sends a call request signal to the own network switch, and the own network switch sends an initial address message to the other network switch. The other network exchange sends an incoming subscriber location request signal to another network home location register, and then sends an address complete message (ACM) to the own network exchange. Thereafter, when the other network exchange receives a response signal for the called subscriber location request from the other home location register, the other network exchange sends an answer message (ANM) to the own network exchange. In case of failure of other network home location register, the toll prefix call processing method detects a call processing error at the other network switch and transmits an error signal to the network switch when the toll terminal location request signal of the network switch fails to respond. It is clear from E that the error has occurred in the other network.

Call processing based on the toll prefix can clarify where the error occurs, but in order to efficiently use the resources of the communication network, the call processing based on the local prefix is applied to query the other network home location register directly from the network switch. . At this time, when a failure in call processing occurs, it is difficult to pinpoint which of the failures occurs in the own network or the other network.

The present invention provides a call processing method and apparatus using a prefix.

Technical problems other than the present invention will be easily understood through the following description.

According to an aspect of the present invention, a call processing method for the exchange requesting the location information of the called terminal in a mobile communication network, the method comprising: (a) requesting the location information of the called terminal to the other network home location register; (b) receiving a response signal corresponding to the request for a designated time; (c) if the response signal is not received during the specified time period, a call processing method is provided, comprising sending an initial address message to another network exchange.

According to another aspect of the invention, the communication unit for transmitting a signal for requesting the location information of the called terminal to the target home location register, and receives a response signal corresponding to the request signal for a specified time; If the communication unit does not receive the response signal during the specified time, an exchange is provided that includes a control unit for controlling the communication unit to transmit an initial address message to another network exchange.

The present invention has the effect of providing a call processing method and apparatus using a prefix.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the term "comprises" is intended to indicate that there is a feature, number, step or combination thereof described on the specification, but the presence or addition of one or more other features or numbers, steps or combinations thereof. It should be understood that the possibility is not excluded in advance.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. In the following description of the present invention, if it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a diagram showing each component of a mobile communication system according to an embodiment of the present invention. Other additional components are required to configure an actual mobile communication system, but will be omitted for clarity. Referring to FIG. 1, a mobile communication system according to an embodiment of the present invention includes an originating terminal 110, a magnetic network switch 120, a home location register 130, another network switch 140, and a called terminal 150. do.

The calling terminal 110 and the called terminal 150 are wireless terminals usable in a mobile communication system using a mobile communication network. For the sake of clarity, the calling terminal 110 is assumed to be a self-subscribed subscriber and the receiving terminal 150 is assumed to be another subscriber.

The mobile switching center (MSC: Mobile Switiching Center) controls voice calls and various additional services, exchanges information with a home location register 130 that stores subscriber information in order to perform an exchange function, and establishes a call path. It provides the connection function between the equipment and external network. The self-switching switch 120 connects directly to the home location register 130 according to the type of the prefix of the called number and makes a location information request or an initial address message (IAM) which is a call request signal to the other network switch 140. Initial Address Massage) can be sent to request location information. The other network switch 140 may request the called subscriber location from the home location register 130 according to the request of the own network switch 120. The other network switch 140 may transmit the incoming subscriber location received from the home location register 130 to the own network switch 120.

The Home Location Register (HLR) is a database located on the user's home system that stores a master copy of the user service profile. For example, the user service profile includes supplementary service information such as service information allowed for the user, roaming area prohibited, call transmission number and call transmission status. The user service profile is created when a new user joins the system and remains stored while subscribed.

In the existing network, when the query is sent from the network switch 120 to the other network, the call prefix processing is performed, but for the resource efficiency of the network, the caller location request is requested from the direct network switch 120 to the target home location register 130. There is a case where a signal is sent (that is, a local prefix call processing is used to query the net). At this time, when a failure occurs in the call processing, there is a problem that it is difficult to pinpoint where the failure occurred in the magnetic network and other networks.

In order to solve this problem, the present invention proposes a prefix (hereinafter, referred to as a LOCL-TOLL prefix) capable of performing both a local prefix and a toll prefix call processing. Hereinafter, the call processing according to the Loctol prefix will be described with reference to FIG. 2. 2 is a flowchart illustrating call processing according to a Loctol prefix according to an embodiment of the present invention.

Referring to FIG. 2, the self network switch 120 transmits a called location request signal to the other network home location register 130. That is, the network switch 120 determines the called user as the network subscriber and performs a MAP call processing with the other network home location register 130. The other network home location register 130 then sends a response signal to the magnetic network switch 120. At this time, if the response signal is not received from the target home location register 130 (for example, signal point down, SCCP SP down, SSN Prohibit) occurs. In contrast, the magnetic network switch 120 transmits an initial address message to the other network switch 140 when it does not receive a response signal for a specified time from the time when the destination location request signal is transmitted. That is, basically, when the request signal is sent to the other network, the network switch 120 performs a MAP call processing according to the LOCAL prefix, and if it does not receive a response signal from the other network home location register 130 for a specified time, it is free of charge. Perform ISUP call processing according to the fix.

Therefore, when a failure occurs in the other network home location register 130, since the network switch performs the call processing according to the toll prefix after the call processing according to the local prefix, it is possible to accurately determine whether the failure occurred in the network or the other network. have.

In addition, in applying the Loctol prefix, call processing to another network connection can be adjusted using the first set value defined as shown in Table 1.

First set value process ON If the prefix call type of the called number is Loctol, the MAP call processing using the local prefix is basically performed during the call processing to the target home location register, and the toll when the response signal is not received from the target home location register for a certain time. Perform ISUP call processing according to the prefix. OFF If the call type of the prefix is Loctol, the ISUP call processing according to the toll prefix is performed when the call is processed to the target home location register.

That is, through the adjustment of the first set value, the network changer 120 may perform call processing according to the existing toll prefix or call processing according to the locktol prefix.

In addition, the magnetic network switch 120 can adjust the call processing to the other network connection by using the second set value defined as shown in Table 2.

2nd set value process ON If the response signal is not received from the target home location register for a certain time, call processing according to the toll prefix is performed. OFF If the response signal is not received from the target home location register for a certain time, fail.

That is, when the network switch 120 does not receive the response signal from the other network home location register 130 for a predetermined time by adjusting the second set value, it may perform call processing or failure processing according to the toll prefix. For example, the magnetic network switch 120 transmits the location information request signal of the called terminal to the home location register 130 and temporarily stores a time (hereinafter, referred to as a transmission time) when the request signal is transmitted. When the network switch 120 does not receive a response signal from the home location register 130 until a specified time elapses from the transmission time, it refers to the second set value. When the second set value is on, the magnetic network switch 120 performs another call processing on the toll prefix. If the second set value is off, the network switch 120 may fail the call processing.

Hereinafter, an exchanger according to an embodiment of the present invention will be described. 3 illustrates an exchanger according to an embodiment of the present invention.

Referring to FIG. 3, the exchange includes a communication unit 121, a control unit 122, and a storage unit 123.

The communication unit 121 may be connected to a mobile communication network to transmit and receive data with an external device. For example, the communication unit 121 may be connected to the calling terminal 110, the other network switch 140, and the home location register 130 through a mobile communication network to transmit and receive data.

The controller 122 adds a prefix to the outgoing signal, and controls transmission and reception of data and signals of the communication unit. When the controller 122 receives the outgoing signal from the communicator 121, the controller 122 may add the locktol prefix. In addition, the control unit 122 may enable the application of the locktol prefix according to the first setting value and the second setting value set by the user. Detailed description thereof has been described above with reference to Tables 1 and 2. The controller 122 may incorporate a timer to measure time from a specific time point. The controller 122 may change the first set value and the second set value by a user input and transmit the same to the storage unit 123, and the user input may be a signal received through the communication unit 121.

The storage unit 123 stores information about the prefix of the exchange. For example, the storage unit 123 may store the prefix information, the first setting value, and the second setting value.

Hereinafter, a description will be given of a process in which the functional units of the above-described exchange function together.

The communication unit 121 receives an outgoing signal through a mobile communication network and transmits the outgoing signal to the control unit 122.

The control unit 122 controls the communication unit 121 to set the prefix call type of the outgoing call signal to the locktol prefix and to request the location information of the called terminal to the home location register 130. At this time, the controller 122 operates a timer to measure a time elapsed from the location information request time (hereinafter referred to as a "response time"). If the response signal is not received and the designated response time ends, the controller 122 controls the communication unit 121 to transmit a call request signal (initial address message) to the other network switch 140. If the response time is less than the designated time, the controller 122 controls the communication unit 121 to perform the next call processing in the same manner as the call processing of the local prefix.

In addition, the controller 122 controls the communication unit 121 to perform a call processing according to a local prefix or a toll prefix according to the first setting value stored in the storage unit 123. If the first setting value and the second setting value are ON and the response signal is not received from the target home location register for a predetermined time, the controller 122 performs call processing according to the toll prefix. In addition, if the first setting value is ON, the second setting value is OFF, and the response signal is not received from the other home position register for a predetermined time, the controller 122 performs call processing for failing.

Hereinafter, a call processing method according to a Loctol prefix of an exchanger according to an embodiment of the present invention will be described with reference to FIG. 4. The process described below is to operate in each functional unit of the exchange, but for the sake of clarity the subject is collectively referred to as the magnetic network exchange 120.

4 is a flowchart illustrating an operation process according to Loctol prefix of an exchange according to an embodiment of the present invention.

Referring to FIG. 4, in step 610, the exchange receives an originating signal.

In step 620, the magnetic network switch 120 requests the location information of the called terminal to the home location register.

In operation 630, the magnetic network switch 120 determines whether a response signal is received from the home location register.

If the response signal is received, the network switch 120 receives the response in step 640, and establishes a call path with the called terminal. The process up to step 640 is the same call processing process as the call processing with the local prefix. Therefore, the call processing according to the lock tall prefix has higher resource efficiency than the toll prefix because the same call processing as the local prefix is performed when there is no obstacle in the communication network.

If no response signal is received, the network switch 120 determines in step 650 whether the response time is longer than the specified time.

If the response time is less than the designated time, the network switch 120 performs the process after step 620.

If the response signal is not received within the response time, in step 660, the magnetic network switch 120 transmits a call request signal to the other network switch. From step 660, the call processing according to the toll prefix is the same.

In operation 670, the magnetic network switch 120 receives the response signal from the other network switch 140.

In operation 680, the magnetic network switch 120 determines whether the other network including the other network switch 140 is in error according to the response signal. For example, the magnetic network switch 120 receives an error occurrence signal from the other network switch 140 and determines that an error has occurred in the other network according to the error occurrence signal.

The switch according to an embodiment of the present invention may change the call processing process according to the Loctrol prefix described with reference to FIG. 4 according to the first set value and the second set value. For example, if both the first setpoint and the second setpoint are ON, the exchange performs the same procedure as described with reference to FIG. 4. If the first set value is ON and the second set value is OFF, the process of failing is replaced instead of the process after step 660. If the first set value is OFF, the exchange performs the same process as the call processing according to the toll prefix.

1 is a view showing each component of a mobile communication system according to an embodiment of the present invention.

2 is a flowchart illustrating call processing according to a Loctol prefix according to an embodiment of the present invention.

3 illustrates an exchanger according to an embodiment of the invention.

4 is a flowchart illustrating an operation process according to Loctol prefix of an exchange according to an embodiment of the present invention.

Claims (6)

In a call processing method of an exchange in a mobile communication network, (a) requesting location information of a called terminal to another home location register; (b) receiving a response signal corresponding to the request for a designated time; (c) if the response signal is not received during the designated time, sending an initial address message to another network exchange; The method according to claim 1, (d) if the response signal is received during the designated time, requesting a call establishment to the destination exchange corresponding to the response signal. The method according to claim 1, (e) receiving a response message corresponding to the initial address message; And and (f) determining whether an error of the other network is generated according to the response message. A communication unit which transmits a signal for requesting location information of a called terminal to a target home location register and receives a response signal corresponding to the request signal for a specified time; And a control unit configured to control the communication unit to transmit an initial address message to another network switch when the communication unit does not receive the response signal for the designated time. 5. The method of claim 4, And the control unit controls the communication unit to make a call setup request to a destination exchange corresponding to the response signal when the communication unit receives the response signal for the designated time. 5. The method of claim 4, The communication unit receives a response message corresponding to the initial address message, And the controller determines whether an error of another network occurs according to the response message.

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