KR20100052703A - Mobile communication exchange and calling method between mobile phone which are different - Google Patents

Abstract

PURPOSE: A call method between a mobile communication exchanger and a different kind of mobile communication terminal are provided to reduce call failure probability by transmitting the paging message including IMSI information in order to call the different kind of mobile communication terminal. CONSTITUTION: An identification number searcher(220) gets TMSI(Temporary Mobile Subscriber Identity) information of a mobile communication terminal to call in a VLR(Visitor Location Register)(110). The identification number searcher gets the IMSI (International Mobile Subscriber Identity) information of the mobile communication terminal in HLR(Home Location Register)(120). A page message generator(230) creates the first paging message including the TMSI information. The page message generator creates the second paging message including the IMSI information.

Description

Mobile communication exchange and calling method between mobile phones which are different}

The present invention relates to a call calling method between a mobile communication exchange and a heterogeneous mobile communication terminal.

The mobile communication exchange generates a paging message corresponding to the call call request signal and transmits the paging message to the mobile communication terminal to be called. At this time, the mobile communication exchange generates a paging message using TMSI information instead of IMSI for security.

The mobile communication exchange calls the mobile communication terminal using the TMSI information allocated to the VLR when there is information on the mobile communication terminal to be called in the VLR, and IMSI received from the HLR when there is no information on the mobile terminal to be called in the VLR. Generates a paging message using the information.

Recently, due to the development of technology, terminals capable of using both W-CDMA communication and GSM communication have been developed and used.

However, when using a GSM mobile terminal in a mobile communication system using W-CDMA, the call processing fails because the TMSI information stored in the GSM mobile terminal does not match the TMSI information included in the paging message. There is this.

It is an object of the present invention to propose a mobile communication switching center capable of generating a paging message comprising IMSI information for calling a heterogeneous mobile communication terminal.

It is another object of the present invention to propose a mobile communication exchange which generates a paging message to widen the calling area when calling a heterogeneous mobile communication terminal.

It is still another object of the present invention to propose a call calling method of a heterogeneous mobile communication terminal which transmits a paging message including IMSI information and retransmits a paging message according to the presence or absence of a response signal to call the heterogeneous mobile communication terminal.

According to an aspect of the present invention, in a mobile communication switch, it acquires Temporary Mobile Subscriber Identity (TMSI) information of a mobile communication terminal to be called by a visitor location register, and an IMSI (International IMSI) of the mobile communication terminal to be called by a home location register. Identification number retrieval unit for obtaining Mobile Subscriber Identity) information; A paging message for generating a first paging message including the TMSI information to be transmitted to the mobile terminal to be called, and for generating a second paging message including the IMSI information if a response signal corresponding to the first paging message is not received. A message generator; And a response signal reception determination unit determining whether a response signal corresponding to the first paging message and the second paging message is present.

According to another aspect of the present invention, in a call calling method of a heterogeneous mobile communication terminal in a mobile communication exchange, a) transmitting a first paging message including Temporary Mobile Subscriber Identity (TMSI) information of a mobile communication terminal to be called; step; b) determining the presence or absence of a response signal corresponding to the first paging message; c) generating a second paging message including International Mobile Subscriber Identity (IMSI) information of the mobile communication terminal to be called when there is no response signal to the first paging message as a result of the determination; And d) transmitting the second paging message.

The call calling method of the mobile communication switch and the heterogeneous mobile communication terminal according to the present invention transmits a paging message including IMSI information to call the heterogeneous mobile communication terminal so as to match the identification number stored in the mobile communication terminal to be called. There is an advantage that can reduce the probability of a call call failure.

In addition, the call calling method of the mobile communication exchange and the heterogeneous mobile communication terminal according to the present invention has an advantage that the calling area can transmit a paging message having a wider area than before when there is no response signal corresponding to the paging message.

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 transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

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 terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate a thorough understanding of the present invention, the same reference numerals are used for the same means regardless of the number of the drawings.

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

Referring to FIG. 1, another mobile communication system according to an embodiment of the present invention includes a core network 10, first to nth base station controllers 131 to 133, and first to nth base stations 141 to 143. .

Here, the core network 10 may include a mobile communication exchange 100, a visitor location register 110, and a home location register 120.

The visitor location register (hereinafter referred to as "VLR") 110 is a database that temporarily stores / manages information on the mobile communication terminal when the mobile communication terminal enters a predetermined area. The VLR 110 manages various identifiers for the mobile communication service subscribers, such as the mobile communication service subscriber number, the mobile communication terminal number, and the routing number.

At this time, the VLR 110 stores a Temporary Mobile Subscriber Identity (TMSI) for security.

The Home Location Register (hereinafter referred to as "HLR") 120 is a database that stores information about mobile communication service subscribers. The HLR 120 provides the VLR 110 with all subscriber databases such as origination, location registration, and incoming call in the mobile communication terminal. In addition, the HLR 120 stores necessary routing information for the call to the mobile communication terminal.

The HLR 120 stores an International Mobile Subscriber Identity (IMSI) initially assigned to a mobile communication service subscriber, and the IMSI is stored in match with the telephone number information of the mobile communication terminal. The HLR 120 updates the routing information when the location is registered in the mobile communication terminal and changes and stores the registration and subscriber information of the new mobile communication service subscriber.

The mobile communication switch 100 generates a paging message for calling the second mobile communication terminal 152 in response to the call call request signal from the first mobile communication terminal 151. The paging message is sent to the second mobile communication terminal 152 via the second base station controller 132 and the second base station 142.

Herein, if there is no response after the first paging message including the TMSI information corresponding to the telephone number to be called is transmitted, the second paging message including the IMSI information is transmitted. The second paging message may include both TMSI and IMSI information. In addition, the second paging message may include address information of the second base station controller 132 and the n-th base station controller 133 to have a calling area in a wider range than the first paging message.

On the other hand, if there is no response corresponding to the second paging message, and generates a third paging message to include the address of the call area, that is, the n-th base station controller 133 and transmits it. Detailed description thereof will be made with reference to FIGS. 2 to 4.

The first to nth base stations 141 to 143 are network termination apparatuses for transmitting / receiving radio signals with the mobile communication terminal. Each of the first to nth base stations 141 to 143 may transmit / receive radio signals from a plurality of mobile communication terminals.

The first to nth base stations 141 to 143 include an RF radio processor and a baseband processor for each base station.

The first base station 141 is connected to the first base station controller 131 by wire, converts a signal received from the first base station controller 131 into a wireless signal, and transmits the converted signal to a mobile communication terminal. In addition, the first base station 141 converts the radio signal received from the mobile communication terminal and transmits it to the first base station controller 131.

The second to nth base stations 142 to 143 perform the same function as the first base station 141.

The first base station controller 131 is located between the first base station 141 and the mobile communication switch 100 to control the first base station 141. The first base station controller 131 allocates a radio channel for each mobile communication terminal and controls transmission outputs of the mobile communication terminal and the first base station 141. The second to nth base station controllers 132 to 133 perform the same function as the first base station controller 131.

The first mobile communication terminal 151 may be a mobile communication terminal using a CDMA communication method such as W-CDMA or IMT2000, a mobile communication terminal using a GSM communication method, or a mobile communication terminal using both methods. The second mobile communication terminal 152 may be a GSM mobile communication terminal or a mobile communication terminal for dual communication capable of W-CDMA and GSM communication. In the present invention, the first mobile communication terminal 151 is a mobile communication terminal using a W-CDMA, CDMA method, the second mobile communication terminal 152 is a mobile communication terminal using a GSM method will be described by way of example Shall be.

In addition, although FIG. 1 illustrates a mobile communication system in relation to a call setup made in a local station, the same applies to call setup with another mobile communication switch.

FIG. 2 is a block diagram schematically showing the configuration of the mobile communication exchange shown in FIG.

Referring to FIG. 2, the mobile communication switch 100 according to an embodiment of the present invention determines whether a call call request signal receiver 210, a paging message generator 230, an identification number searcher 220, and a response signal are received. The unit 250 and the paging message transmitter 240 is included.

Specifically, the call call request signal receiving unit 210 receives telephone number information of the second mobile communication terminal 152 called by the first mobile communication terminal 151.

The identification number search unit 220 searches the VLR 110 and reads out TMSI information matching the telephone number information of the called second mobile communication terminal 152.

In addition, the identification number search unit 220 searches the HLR 120 and reads out IMSI information registered by the second mobile communication terminal 152 for the first time. In addition, the identification number search unit 220 searches the VLR 110 to read TMSI information when the first paging message is generated, and reads the IMSI information by searching the HLR 120 when the second paging message is generated.

Here, the identification number retrieval unit 220 searches for the HLR 120 according to the result of the response signal not received corresponding to the paging message transmitted from the response signal reception determination unit 250. The identification number search unit 220 transmits the IMSI information retrieved from the HLR to the paging message generator 230.

The paging message generator 230 generates a call message including TMSI information according to the telephone number of the second mobile communication terminal 152 received from the call call request signal receiver 210.

The paging message generating unit 230 searches for the VLR according to the telephone number of the second mobile communication terminal 152 and generates a first paging message when TMSI information is read and input. In this case, the first paging message includes TMSI information and address information of the switch registered by the second mobile communication terminal 152. The first paging message may further include an address of the base station controller registered by the second mobile communication terminal 152.

The paging message generator 230 may generate a second paging message including the IMSI information of the second mobile communication terminal 152.

As illustrated in FIG. 3, the second paging message includes IMSI information registered by the second mobile communication terminal 152 when the second mobile communication terminal 152 is initially registered. In addition, the second paging message may include address information of a mobile communication exchange, a base station controller, a base station, and the like. The second paging message may include an address of a mobile communication exchange, a base station controller that can search a wider range of base station controllers than the first paging message.

Meanwhile, as illustrated in FIG. 4, the second paging message may include IMSI information and TMSI information of the second mobile communication terminal 152. That is, even if the VLR 110 has location registration information for the second mobile communication terminal 152, the second mobile communication terminal receives IMSI information and TMSI information in the second paging message to receive the second paging message. If the information of any one of the IMSI information or TMSI information is matched to enable the response signal to be transmitted. Accordingly, after receiving the second paging message, the second mobile communication terminal matches one of the subscriber information stored in the internal smart card and the IMSI information or the TMSI information included in the second paging message to match the first mobile communication terminal. Call setup is possible.

Meanwhile, the paging message generator 230 may generate a third paging message. The third paging message includes all of the information included in the second paging message, and further includes address information of the mobile communication exchange and the base station controller. That is, the third paging message is generated to include address information of the mobile communication exchange and the base station controller in a wider range than the second paging message so that the second mobile communication terminal can be called in a wide area.

Here, the first to third paging messages are generated sequentially. That is, the first paging message is generated first, the second paging message is generated when the response signal for the first paging message is not received, and the third paging message cannot receive the response signal for the second paging message. If generated.

If the paging message generator 230 does not receive a response signal for the paging message after generating the third paging message, the paging message generator 230 may generate a call call failure message to be transmitted to the first mobile communication terminal 151.

The paging message generator 230 may insert TMSI and IMSI information in a state where a default value is defined when generating the first to third paging messages. In this case, TMSI or IMSI information is inserted into the message form set according to the type that can be inserted by selecting TMSI or IMSI information.

The response signal reception determination unit 250 determines whether a response signal received from the second mobile communication terminal is received after the paging message is sent.

If the response signal reception determination unit 250 does not receive a response signal corresponding to the first paging message for a predetermined time after the first paging message is transmitted, the response number reception unit 220 and the paging message generator Transmit to 230. The result value according to the first paging message may be a signal for generating a second paging message.

The response signal reception determiner 250 transmits a result value to the paging message generator 230 when the response signal corresponding to the second paging message is not received for a preset time after the second paging message is sent. . The result value according to the second paging message is a signal for generating a third paging message.

The response signal reception determiner 250 transmits a result value to the paging message generator 230 when the response signal corresponding to the third paging message is not received for a preset time after the third paging message is sent. . Here, the result value according to the third paging message is a signal for generating a message indicating that the call is not possible.

On the other hand, if it is determined that the response signal corresponding to the first to third paging messages has been received by the response signal reception determination unit 250, the exchange transmits the response success message to the paging message generator so as to set up the call. For example, when it is determined that the response signal corresponding to the first paging message is received by the response signal reception determination unit 250, the response signal reception determination unit 250 responds to the call setup unit (not shown) of the mobile communication switch 100 to enable call setup. A result value according to the signal success is generated to establish a call between the first mobile communication terminal 151 and the second mobile communication terminal 152.

The response signal reception determination unit 250 determines that a response signal corresponding to each of the second paging message and the third paging message has been received, and provides a result value to the call setup unit to enable call setup as in the above example. can do.

The paging message transmitter 240 transmits the first to third paging messages input from the paging message generator 230. At this time, the paging message transmitter 240 may transmit to the mobile communication exchange or the base station controller according to the addresses of the mobile communication exchange and the base station controller included in the first to third paging message.

The components of the mobile communication exchange described above may be manufactured in a single module, and each of them may be separated, or some may be manufactured in one module and the others may be separated, and thus description thereof will be omitted. . In addition, the present invention has been described with reference to the paging message, for example, but is not limited thereto, and may be equally applicable to a call call signal for transmitting a message such as an SMS or an MMS.

FIG. 5 is a flowchart illustrating a call setup method when a call is made by a heterogeneous mobile communication terminal according to an exemplary embodiment of the present invention. FIG. 5 is a diagram illustrating a call setup by receiving a response signal corresponding to a second paging message. to be.

Referring to FIG. 5, when receiving a call call request signal from the first mobile communication terminal, the mobile communication switch 100 generates and transmits a first paging message to the second mobile communication terminal 152 to be called (500). In this case, the first paging message may include TMSI information and may include base station controller address information registered by the second mobile communication terminal.

The mobile communication exchange 100 waits for a response signal corresponding to the first paging message for a preset time after the first paging message is transmitted (600).

At this time, if a response signal corresponding to the first paging message is received, call setup is made.

However, if a response signal corresponding to the first paging message is not received, the mobile communication switch 100 requests IMSI information from the HLR 120 (601).

HLR 120 provides the mobile communication exchange 100 with IMSI information registered by the requested second mobile communication terminal 152 (602).

Next, the mobile communication switch 100 generates a second paging message including the IMSI information registered by the second mobile communication terminal 152 (700). In this case, the second paging message may include not only address information of the base station controller included in the first paging message but also address information of the plurality of base station controllers in order to transmit the paging message to a wider area. In addition, the second paging message may further include TMSI information. That is, the second paging message may include both IMSI information and TMSI information.

Next, the mobile communication exchange 100 transmits a second paging message (800). The second mobile communication terminal 152 receives the second paging message and compares the identification information stored in the second mobile communication terminal with the IMSI information, and transmits a response signal to the mobile communication exchange 100 if they match.

When the response signal corresponding to the second paging message is received, the mobile communication exchange 100 sets up a call with the second mobile communication terminal (910).

6 is a flowchart illustrating a method of making a call call to a heterogeneous terminal in a mobile communication exchange according to an embodiment of the present invention.

Referring to FIG. 6, a step of generating / transmitting a first paging message (S100), determining whether a response signal corresponds to the first paging message (S200), and generating / transmitting a second paging message when there is no response signal ( S300), determining whether there is a response signal corresponding to the second paging message (S400), if there is no response signal, generating / transmitting a third paging message (S500), determining whether a response signal corresponds to the third paging message Step S600 includes a call setup step S700 and a call processing failure step S800.

Specifically, in the first paging message generation / transmission step S100, when the first mobile communication terminal makes a call call to the second mobile communication terminal, the call call request signal is transmitted to the mobile communication exchange. The mobile communication exchange generates a first paging message and transmits it to a second base station controller whose location of the second mobile communication terminal is registered. In this case, the first paging message includes TMSI information that matches the telephone number information of the second mobile communication terminal.

The first paging message is transmitted to the plurality of mobile communication terminals through the plurality of base stations managed by the second base station controller.

Next, the mobile communication exchange determines whether the response signal is received from the second mobile communication terminal having the TMSI information included in the first paging message (S200).

At this time, when a response to the first paging message is received within a preset time, a call is established with the corresponding mobile communication terminal (S700).

However, if there is no response signal corresponding to the first paging message within the preset time, the mobile communication exchange performs the next step.

Generating / transmitting the second paging message (S300) generates a message including IMSI information that matches the telephone number information of the second mobile communication terminal in the mobile communication exchange. The method may further include searching for the HLR of the core network. The searching of the HLR may include searching the HLR through telephone number information of the second mobile communication terminal, searching the HLR through TMSI information, and extracting the IMSI information.

In step S300 of generating / transmitting a second paging message, address information of the plurality of base station controllers is included in the second paging message to transmit the second paging message to the plurality of base station controllers. That is, the second paging message includes address information of the first and second base station controllers, or includes address information of the first to nth base station controllers. In addition, address information of another mobile communication exchange and address information of a plurality of base station controllers connected thereto may be included.

Meanwhile, in the step of generating the second paging message, the second paging message may include TMSI information as well as IMSI information.

Next, the second paging message is transmitted to the plurality of base station controllers according to the address information included in the generated second paging message.

Next, in step S400 of determining whether there is a response signal corresponding to the second paging message, the mobile communication switch determines whether a response signal corresponding to the second paging message is received from the second mobile communication terminal.

When receiving a response signal corresponding to the second paging message for a preset time, the mobile communication exchange establishes a call between the first mobile communication terminal and the second mobile communication terminal (S700). However, if it is determined that the mobile communication exchange has not received the response signal corresponding to the second paging message for a preset time, it performs the next step.

Next, in step S500 of generating / transmitting a third paging message, when a response signal corresponding to the second paging message is not received, a third paging message is generated and transmitted. Here, the third paging message includes at least IMSI information of the second mobile communication terminal to be called. Meanwhile, the third paging message may include TMSI information as well as IMSI information of the second mobile communication terminal to be called. The third paging message includes address information of the mobile communication exchange or the base station controller included in the second paging message as well as address information of the other mobile communication exchange and the base station controller so as to widen the calling area of the second mobile communication terminal. That is, the third paging message includes all the information of the second paging message, and additionally includes address information of the base station controller or the mobile communication exchange that is not included in the second paging message.

The third paging message generated at the mobile communication exchange may be transmitted to the plurality of base station controllers according to the address information, and may be transmitted to the plurality of base station controllers through other mobile communication exchanges.

Next, it is determined whether there is a response signal corresponding to the third paging message (S600).

When a response signal corresponding to the third paging message is received, a call is established between the first and second mobile communication terminals (S700).

However, if a response signal corresponding to the third paging message is not received, the call processing failure process (S800) may be performed and transmitted to the first mobile communication terminal.

Although the above has been described with reference to the embodiments of the present invention, those skilled in the art may variously change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. It will be appreciated that modifications and variations can be made.

1 is a diagram schematically illustrating a mobile communication system according to an embodiment of the present invention.

FIG. 2 is a block diagram schematically showing the configuration of the mobile communication exchange shown in FIG.

3 illustrates an example of a second paging message according to an embodiment of the present invention.

4 illustrates an example of a second paging message according to an embodiment of the present invention.

FIG. 5 is a flowchart illustrating a call setup method when a call is made by a heterogeneous mobile communication terminal according to an exemplary embodiment of the present invention. FIG. 5 is a diagram illustrating a call setup by receiving a response signal corresponding to a second paging message. .

6 is a flowchart sequentially illustrating a call calling method between heterogeneous mobile communication terminals according to an embodiment of the present invention.

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

10: core network 100: mobile switching center

110: VLR 120: HLR

131: first base station controller 141: first base station

151: first mobile communication terminal 152: second mobile communication terminal

210: call call request signal receiving unit 220: identification number search unit

230: paging message generator 240: paging message transmitter

250: response signal reception determination unit

Claims (10)

In a mobile communication exchange, An identification number retrieval unit for acquiring Temporary Mobile Subscriber Identity (TMSI) information of the mobile communication terminal to be called by the visitor location register and obtaining IMSI (International Mobile Subscriber Identity) information of the mobile communication terminal to be called by a home location register; A paging message for generating a first paging message including the TMSI information to be transmitted to the mobile terminal to be called, and for generating a second paging message including the IMSI information if a response signal corresponding to the first paging message is not received. A message generator; And And a response signal reception determination unit to determine whether a response signal corresponding to the first paging message and the second paging message is present. The method of claim 1, The paging message generating unit And a third paging message is generated when a response signal corresponding to the second paging message is not received. The method of claim 2, And the third paging message includes at least all information included in the second paging message and further includes address information of a mobile communication exchange or a base station controller that is not included in the second paging message. The method according to any one of claims 1 to 3, And the second paging message includes the IMSI information and the TMSI information. In a call call method of a heterogeneous mobile communication terminal in a mobile communication exchange, a) transmitting a first paging message including Temporary Mobile Subscriber Identity (TMSI) information of a mobile communication terminal to be called; b) determining the presence or absence of a response signal corresponding to the first paging message; c) generating a second paging message including International Mobile Subscriber Identity (IMSI) information of the mobile communication terminal to be called when there is no response signal to the first paging message as a result of the determination; And and d) transmitting the second paging message. The method of claim 5, In step (a), The mobile communication switch further comprises the step of transmitting the first paging message to a plurality of base station controllers including a base station controller registered by the mobile communication terminal to be called. The method of claim 5, In step (c), And searching for a home location register connected to the mobile communication exchange to read IMSI information. The method according to any one of claims 5 and 7, In step c), And the second paging message includes IMSI information and TMSI information. The method of claim 5, In step c), The second paging message further comprises the address information of the mobile communication exchange and the base station controller included in the first paging message and the address information of the base station controller to be added. The method of claim 5, After step d) above, Determining the presence or absence of a response signal corresponding to the second paging message; Generating a third paging message when there is no response signal corresponding to the second paging message as a result of the determination; And Transmitting the third paging message; The third paging message includes address information of the mobile communication exchange and the base station controller included in the second paging message, and further includes address information of the mobile communication exchange and the base station controller other than the mobile communication exchange and the base station controller. Call call method of a heterogeneous mobile communication terminal, characterized in that.

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