KR20060061610A - Mobile communication device of providing hand-off by user'selection and method therefor - Google Patents

Abstract

The present invention relates to a mobile communication terminal for performing a handoff and a handoff method. More particularly, when performing a handoff from a first communication network to a second communication network, the user provides information on the handoff. A mobile communication terminal and a hand for receiving maintenance or termination information on a call connection or a data connection currently provided from a mobile communication system to determine whether the call or data connection is performed after executing a handoff to the second communication network. It's about how to turn off.

A mobile communication terminal according to an embodiment of the present invention, a communication network connection modem for connecting to at least one communication network, a communication unit for performing a mobile communication connection with a predetermined mobile communication system using the connected communication network, the communication network connection A handoff control unit performing a handoff from a first communication network connected to a second communication network via a modem, providing the user with handoff execution information to the second communication network, and maintaining or maintaining the mobile communication connection from the user; And a user interface unit for receiving information on termination, and a system information storage unit for storing system information on the first communication network when the mobile communication connection termination information is received from the user.

According to the mobile communication terminal and the handoff method of the present invention, when the mobile communication terminal performs a handoff, it provides the user with information about the handoff, and receives from the user whether to maintain or terminate the connected mobile communication service. Thus, the effect of providing a more efficient mobile communication service by the user's selection can be obtained.

Mobile terminal, handoff, EV-DO, 1x, 2G

Description

MOBILE COMMUNICATION DEVICE OF PROVIDING HAND­OFF BY USER 'SELECTION AND METHOD THEREFOR}

1 is a diagram illustrating a configuration in which a mobile communication terminal is located in a cell of an EV-DO communication network, a 1x communication network, or a 2G communication network according to an embodiment of the present invention.

2 is a block diagram showing the configuration of a mobile communication terminal according to an embodiment of the present invention;

3A to 3C illustrate screens of a mobile communication terminal providing handoff execution information and a mobile communication connection to a user when handoff is performed according to an embodiment of the present invention.

4 is a diagram illustrating a configuration of a mobile communication terminal performing a handoff according to another embodiment of the present invention.

5 is a flowchart illustrating a procedure of a handoff method of a mobile communication terminal according to an embodiment of the present invention.

6 is a flowchart illustrating a procedure of a handoff method according to a case in which a handoff is performed again to a first communication network after performing a handoff to a second communication network.

7 is a flowchart showing a procedure of a handoff method of a mobile communication terminal according to another embodiment of the present invention.

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

200: mobile communication terminal 210: communication network connection modem

220: communication unit 230: handoff control unit

240: user interface unit 250: system information storage unit

The present invention relates to a mobile communication terminal for performing a handoff and a handoff method. More particularly, when performing a handoff from a first communication network to a second communication network, the user provides information on the handoff. A mobile communication terminal and a hand for receiving maintenance or termination information on a call connection or a data connection currently provided from a mobile communication system to determine whether the call or data connection is performed after executing a handoff to the second communication network. It's about how to turn off.

The mobile communication system has evolved into the second generation digital method through the analog method called the first generation. Second-generation mobile communication systems have evolved into TDMA (GSM) used in Europe, China, and parts of the United States, and CDMA used in Asia-Pacific, such as the United States, Korea, and Australia, depending on the access method in the wireless section. . Also, in the late 1990s, the mobile telecommunication market developed rapidly due to the commercialization of mobile telecommunication service under the concept of PCS. The second generation mobile communication system has generalized mobile phone service to the general public based on the advantages of stable service and low rate, but it has a limitation that the scope of service is limited to service, service provider or country limited to voice call. Roaming between different operators and systems is a problem in order to guarantee mobility between countries.In the 2nd generation mobile communication service, terminals used in a specific region due to different wireless access standards between regions or countries can be used in different regions. I could not. In addition, since the data rate is only about 14.4kbps, there is a problem that high-speed data transmission such as video is impossible.

IMT-2000, the third generation mobile communication service, has emerged to overcome the limitations due to the limitations of the technology and the frequency band and to provide a multimedia level service through faster transmission. In other words, IMT-2000 is a service that can freely exchange multimedia information such as voice, video, and data with anyone you want anywhere in the world.

If full-scale service of IMT-2000 is provided, it is possible to provide multimedia services such as internet and video transmission in a better mobile environment through the high-speed wired / wireless integrated network. Ultimately, global roaming can be used anywhere in the world with one terminal. You will be served.

However, in Korea, commercialization of IMT-2000 service is delayed due to mobile communication service providers and other conditions, and CDMA 1x EV-DO, which is called 2.5 generation mobile communication, is widely used. EV-DO (Evolution-Data only) is a mobile communication service upgraded from the existing CDMA2000 1x. It uses up to 2.4Mbps of data by using video data such as VOD without using a voice communication network. The transmission rate can be guaranteed. Conventional CDMA-2000 1x uses data network as a communication network, so it is difficult to watch movies or movies because of its slow speed, but EV-DO has a separate data network, so large data can be transmitted.

However, the EV-DO mobile communication network as described above requires a dedicated terminal supporting EV-DO to receive the service. Currently, 2G (second generation mobile communication network), 1x, and EV-DO mobile communication services are mixed in Korea. It is provided together.

For the above reason, when the user who received the EV-DO service moves to an area where only 1x or 2G service is provided, the user's mobile terminal performs handoff to 1x or 2G in the EV-DO.

However, according to the related art, the information on performing the handoff is not automatically provided to the user but is automatically performed in the mobile communication terminal, so that the user may not even know whether the handoff has been performed, causing inconvenience. For example, if the user is downloading data at the fast connection speed of the EV-DO network, and the handoff is performed to the 1x network, the user cannot know the performance information of the handoff, and thus the user originally expected. The data will continue to be downloaded at a slow rate of 1x, well below the high speed of EV-DO. In this case, the user may be charged an expensive mobile communication fee due to the slow data download, resulting in considerable inconvenience.

For the above reason, there is an urgent need for the development of a mobile communication terminal that provides a user with information about the handoff when executing the handoff so that the user can decide to maintain or terminate the mobile communication service according to the handoff.

The present invention has been made to improve the prior art as described above, when the mobile communication terminal performs a handoff, providing information about the handoff to the user, and maintain or terminate the mobile communication service being accessed from the user It is an object of the present invention to provide a mobile communication terminal and a handoff method for providing a more efficient mobile communication service by user selection.

In addition, the present invention provides the user with information about the communication network to perform the handoff before the mobile terminal performs the handoff to allow the user to determine whether to perform the handoff, thereby maximizing the user's convenience An object of the present invention is to provide a mobile communication terminal and a handoff method.

The present invention also provides a handoff information to the communication network when the communication network before the termination of the mobile communication service is searched again after the mobile communication service is terminated according to the handoff. An object of the present invention is to provide a mobile communication terminal and a handoff method that can be provided continuously from the end point.

In order to achieve the above object and solve the problems of the prior art, a mobile communication terminal according to an embodiment of the present invention, a communication network connection modem for performing connection with at least one communication network, a predetermined mobile communication using the connected communication network A communication unit performing a mobile communication connection with a system, a handoff control unit performing a handoff from a first communication network connected through the communication network connection modem to a second communication network, and handing off the user to the second communication network; A user interface unit for receiving information about the maintenance or termination of the mobile communication connection from the user, and storing the system information on the first communication network when the mobile communication connection termination information is received from the user. It is configured to include a system information storage.

In addition, the mobile communication terminal according to another embodiment of the present invention, a communication network connection modem for connecting to at least one communication network, the connection signal level value of the first communication network connected through the communication network connection modem is connected to the second communication network A handoff execution information unit for generating handoff execution information to the second communication network if the signal level value is smaller than the signal level value, providing information to the user on whether to perform handoff to the second communication network, A user interface unit for receiving information on execution or non-execution of handoff, and when receiving handoff execution information from the user, executes handoff to the second communication network and receives the handoff non-execution information. In this case, a handoff control unit maintaining a connection with the first communication network, and executing handoff from the user. When receiving the information, it comprises a system information storage unit for storing the system information for the first communication network.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a diagram illustrating a configuration in which a mobile communication terminal is located in a cell of an EV-DO communication network, a 1x communication network, or a 2G communication network according to an embodiment of the present invention.

According to FIG. 1, the mobile communication terminal 100 of the present invention may be located in any one or more cells of an EV-DO communication network, a 1x communication network, or a 2G communication network, that is, a service area. Cell 1 110 is an area in which the EV-DO communication network is served, cell 2 120 is an area in which the 1x communication network is served, and cell 3 130 is an area in which the 2G communication network is served. EV-DO network supports 2.4Mbps data rate, 1x network supports 153.6Kbps data rate, and 2G network supports 14.4Kbps data rate.

In addition, zone 1 140 is a zone where the EV-DO communication network of cell 1 110 and the 1x communication network of cell 2 120 are mixed and serviced, and zone 2 150 is the EV-DO of cell 1 110. The communication network and the 2G communication network of the cell 3 (130) is a mixed service area. Zone 3 (160) is a zone where the 1x network of cell 2 (120) and the 2G network of cell 3 (130) are mixed and serviced. Zone 4 (160) is an EV-DO network and cell 2 of cell 1 (110). The 1x communication network of 120 and the 2G communication network of cell 3 130 are mixed and serviced.

The mobile communication terminal 100 widely used in the present specification performs a handoff to a terminal of a multimode concept capable of supporting a mobile communication service by connecting to any one or more communication networks of an EV-DO communication network, a 1x communication network, or a 2G communication network. it means. In addition, the mobile communication terminal 100 includes a predetermined memory and is equipped with a predetermined microprocessor to collectively refer to a mobile communication terminal such as a mobile phone having a predetermined computing power. A cellular phone, a PCS phone, a smartphone, a DMB It can be implemented including a phone, a personal digital assistant (PDA) and a handheld PC capable of mobile communication services. The mobile communication terminal 100 may support wired Internet or wireless Internet or CDMA 1x or EV-DO mobile communication network, IMT-2000 mobile communication network, WCDMA mobile communication network, Bluetooth (Bluetooth) method, Infrared Data Association (IrDA). have.

As shown in FIG. 1, when the mobile communication terminal 100 is located in the cell 1 110, the mobile communication service is provided to the user by connecting to the EV-DO communication network. When the mobile communication terminal 100 is located in the cell 2 120, the 1x communication network is provided. When located in cell 3 (130), it connects to a 2G communication network and provides a mobile communication service to a user.

When the mobile communication terminal 100 is located in the 1 zone 140 while relocating from the cell 1 110 to the cell 2 120, the mobile terminal 100 performs a handoff from the EV-DO communication network to the 1x communication network. If the location is located in the second zone 150 while changing the location from the cell 110 to the cell 3 130, a handoff is performed from the EV-DO communication network to the 2G communication network.

In addition, when the mobile communication terminal is located in zone 3 (160) while changing the location from cell 2 (120) to cell 3 (130), handoff is performed from the 1x communication network to the 2G communication network. In case of located in, the access signal level values respectively received from the EV-DO communication network, the 1x communication network, or the 2G communication network are measured according to the direction of the cell to be moved, and handoff is performed to the communication network where the level value is largely measured.

Although FIG. 1 illustrates an EV-DO communication network, a 1x communication network, or a 2G communication network as an example, this is only an embodiment of the present invention, and the mobile communication terminal of the present invention is only the EV-DO communication network, 1x communication network, or 2G communication network. In addition, the mobile communication service may be provided to the user by connecting to another communication network, and handoff may be performed in the other communication network.

2 is a block diagram showing the configuration of a mobile communication terminal according to an embodiment of the present invention.

Mobile communication terminal 200 according to an embodiment of the present invention is located in any one or more service areas of the EV-DO communication network, 1x communication network, or 2G communication network connected to any one or more of the communication network to the mobile communication service to the user In the area where the communication network is mixed and served, handoff may be performed to the communication network in which the access signal level is largely measured.

Mobile communication terminal 200 according to an embodiment of the present invention is largely connected to the network connection modem 210, the communication unit 220, the handoff control unit 230, the user interface unit 240, the system information storage unit 250 It is configured to include.

The communication network access modem 210 may provide a mobile communication service to a user by performing connection with at least one communication network and transmitting and receiving an access signal with the communication network. That is, the communication network access modem 210 searches for and receives an access signal of a communication network that can be received in the area where the mobile communication terminal 200 is currently located, for example, an access signal transmitted from a base station of a mobile communication service provider. By continuously receiving an access signal from the base station to inform the user that the mobile communication service is possible. This may provide the user with the mobile communication service possible by displaying the size of the antenna reception signal on the LCD screen of the mobile communication terminal 200.

According to an embodiment of the present invention, the network connection modem 210 includes an EV-DO connection modem 211, a 1x connection modem 212, and a 2G connection modem 213.

The EV-DO access modem 211 may provide a user with a mobile communication service through an EV-DO communication network when the mobile communication terminal 200 is located in an area where an EV-DO communication network is provided. Due to the high speed of 2.4Mbps, it mainly provides data services such as VOD, video telephone, and online games.

The 1x access modem 212 may provide a user with a mobile communication service through a 1x communication network when the mobile terminal 200 is located in an area where a 1x communication network is provided. The 1x communication network may provide a speed of 153.6 Kbps. It is characterized by.

The 2G access modem 213 may provide a user with a mobile communication service through a 2G communication network when the mobile communication terminal 200 is located in an area where a 2G communication network is provided. The 2G communication network means a second generation mobile communication service. As a communication network, a speed of only 14.4 Kbps may be sufficient for a voice call service, but a data connection service is not used because it is too difficult for the connection speed.

When the mobile communication terminal 200 receives a connection signal from a predetermined communication network and is located in a mobile communication service area through the communication network access modem 210, the communication unit 220 uses a predetermined mobile communication network using the connected communication network. A system, that is, a base station or a server of a mobile communication service provider is connected to provide a mobile communication service of a call connection or data connection to a user. The communication unit 220 is a concept distinct from the communication network access modem 210. The communication unit 220 does not receive a connection signal level value from the communication network, but provides a call connection or a data connection to the user.

That is, when the user starts to operate the mobile communication terminal 200 by supplying power to the mobile communication terminal 200 which is turned off, the mobile communication terminal 200 first searches for a connection signal that can be received and performs a mobile communication service. Determine whether can be provided. For example, when receiving the access signal from the 2G communication network, by displaying the antenna size on the LCD of the mobile communication terminal 200, it can inform the user that the current 2G mobile communication service is available. The user sees this and finds out that a mobile communication service is possible, so that the user can be provided with a mobile communication service, for example, a call connection service or a data service. As described above, the call connection or data connection operation is performed through the communication unit 220.

The handoff controller 230 performs a handoff from the first communication network connected through the communication network access modem 210 to the second communication network. The first communication network or the second communication network is a concept of referring to any one of the EV-DO communication network, 1x communication network, or 2G communication network. The handoff control unit 230 compares the magnitude of the connection signal level value with the first communication network and the magnitude of the connection signal level value with the second communication network, so that the connection signal level value with the second communication network is equal to the first communication network. If it is greater than the connection signal level with the user, the user is handed off to the second communication network.

The handoff is a concept of handoff that can be generally performed in a mobile communication terminal, and the detailed operation process can be performed at a general level well known to those skilled in the art.

The user interface unit 240 provides the user with handoff execution information to the second communication network through the handoff control unit 230 and receives information about the maintenance or termination of the mobile communication connection from the user. For example, when a handoff is performed from the first communication network to the second communication network through the handoff control unit 230, when the user is connecting to the mobile communication system, the user interface unit 240 performs the handoff execution information. To the user.

The handoff execution information provided to the user may include information on a communication network where the handoff is performed and a speed provided from the communication network. For example, when performing the handoff from the EV-DO network to the 1x network, the user interface unit 240 may change from the EV-DO network that provides the speed of 2.4 Mbps to the 1x network that provides the speed of 153.6 Kbps. Handoff "and handoff enforcement information to the user.

In addition, if the user is currently receiving data service, "Do you want to keep the data connection?" And asking the user to maintain or terminate the mobile communication connection, and receive a response from the user regarding the maintenance or termination of the mobile communication connection.

As described above, when the handoff is performed, the user may be provided with execution information and speed information of the handoff, thereby determining whether to maintain a currently connected data service. For example, if a mobile terminal is handed off to a 1x network at 153.6 Kbps while downloading data through an EV-DO network at 2.4 Mbps, the data can be downloaded over the EV-DO network due to its relatively slow speed. It is possible to prevent the disadvantage that a higher fee may be charged.

The system information storage unit 250 receives the mobile communication connection termination information from the user when the handoff is performed from the first communication network to the second communication network through the handoff control unit 230 and accesses the mobile communication through the communication unit 220. If this is terminated, the system information for the first communication network is stored. By storing the first communication network system information as described above, if a handoff is performed to the first communication network after performing the handoff to the second communication network, the user is notified and the handoff is performed from the first communication network to the second communication network. When performed, it may provide whether to reconnect to the mobile communication service that terminated the connection.

3A to 3C illustrate screens of a mobile communication terminal providing handoff execution information and a mobile communication connection to a user when handoff is performed according to an embodiment of the present invention.

As shown in FIG. 3A, when a user downloads an MP3 file of "Maybe Love" by singer Park Jung-hyun through an EV-DO network using the mobile communication terminal according to an embodiment of the present invention, the mobile communication terminal is connected to the EV- A handoff may be performed from the DO network to the 1x network. When the handoff is performed, the mobile communication terminal provides the handoff execution information to the user as shown in FIG. 3B, and provides the user with the connection speed of the EV-DO network and the connection speed of the 1x network to be handed off. Can provide.

In addition, as illustrated in FIG. 3C, the mobile communication terminal may inquire whether the user keeps downloading the MP3 file currently being downloaded or terminates at 58%. When the user hands off to a 1x network slower than the expected connection speed of the EV-DO network, the downloading of the MP3 file is terminated at 58%, and the mobile terminal is subsequently handed back to the EV-DO network. The MP3 file can be downloaded again at 58% when off.

4 is a diagram illustrating a configuration of a mobile communication terminal performing a handoff according to another embodiment of the present invention.

The mobile communication terminal 400 illustrated in FIG. 4 largely includes a communication network access modem 410, a handoff execution information unit 420, a user interface unit 430, a handoff control unit 440, and a system information storage unit 450. It is configured to include.

The communication network access modem 410 may provide a mobile communication service to a user by performing a connection with at least one communication network and transmitting and receiving an access signal with the communication network.

The handoff execution information unit 420 executes handoff to the second communication network when the connection signal level value of the first communication network connected through the network connection modem 410 is smaller than the connection signal level value of the second communication network. Generate status information.

The user interface unit 430 provides the user with information on whether the handoff is performed to the second communication network, and receives information on the execution or non-execution of the handoff from the user.

When the handoff control unit 440 receives the information on the handoff execution from the user, the handoff control unit 440 executes a handoff to the second communication network, and when the handoff non-execution information is received, the handoff control unit 440 is connected to the first communication network. Keep the connection.

When the system information storage unit 450 receives the handoff execution information from the user, the system information storage unit 450 stores the system information on the first communication network, and then executes the handoff to the second communication network, and then performs handoff to the first communication network again. If performed, the user may be provided with handoff execution information to the first communication network.

As described above, the user is asked whether the handoff is executed, and the mobile communication terminal 400 executes or not executes the handoff according to the user's selection, so that the user does not execute the handoff to a communication network that the user does not want. Therefore, the effect of preventing the waste of network resources can be expected.

5 is a flowchart illustrating a procedure of a handoff method of a mobile communication terminal according to an embodiment of the present invention.

According to an embodiment of the present invention, the mobile communication terminal provides a user with whether to maintain or terminate the connection of the mobile communication service that is currently connected to the user during execution of the handoff, so that the user can select the maintenance or termination of the mobile communication connection. To be able.

The communication network connection modem maintains a connection with the first communication network (step 511), and a mobile communication connection, for example, a call connection or a data connection, with a predetermined mobile communication system using the first communication network is performed through the communication unit. Perform (step 512).

In step 512, during the mobile communication connection, the network connection modem receives a connection signal from a second communication network (step 513), and compares the first network connection signal level value with the second network connection signal level value ( Step 514), if the second network connection signal level value is greater than the first network connection signal level value, handoff to the second communication network (step 515), and connect the second network connection. If the signal level value is smaller than the first network connection signal level value, the flow returns to step 511 to maintain the first network connection.

After performing a handoff to the second communication network in step 515, the user is provided with information about the handoff execution information to the second communication network and information about maintaining or terminating the mobile communication connection (step 516). If the mobile communication connection maintenance information is received from the user, the mobile communication connection is maintained (step 518).

If the mobile communication connection termination information is received from the user in step 517, the system information for the first communication network is stored (step 518), and the mobile communication connection is terminated (step 520). ).

FIG. 6 is a flowchart illustrating a procedure of a handoff method according to a case where a handoff is performed again to a first communication network after performing a handoff to a second communication network.

In FIG. 5, when the user terminates the mobile communication connection by performing a handoff to the second communication network, the mobile communication terminal may perform a handoff to the third communication network (step 611). The mobile communication terminal compares the third communication network system information with the first communication network system information and provides the user with handoff information to the third communication network when the system information of each other is the same (step 612). (Step 614). If the third network system information and the first network system information are different in step 612, the connection of the third network is maintained (step 613).

The mobile communication terminal provides the user with information on whether to reconnect to the mobile communication system where the connection is terminated when performing a handoff from the first communication network to the second communication network (step 615), and reconnects the mobile communication from the user. When the information is received (step 616), the mobile communication system reconnects. If the mobile communication reconnection information is not received from the user in step 616, the third communication network connection is maintained without reconnecting to the mobile communication system (step 617).

7 is a flowchart illustrating a procedure of a handoff method of a mobile communication terminal according to another embodiment of the present invention.

In the handoff method according to another embodiment of the present invention, when a handoff is required from the first communication network to the second communication network, a handoff is notified to the user and the handoff is determined according to the user's selection. It is a way.

The mobile communication terminal performs a connection with the first communication network through a network connection modem (step 711) and receives a connection signal from the second communication network (step 712).

The first network connection signal level value and the second network connection signal level value are compared (step 712), and if the second network connection signal level value is greater than the first network connection signal level value, the second Generate handoff execution information to the communication network (step 714) and provide the user with handoff execution information to the second communication network (step 715).

If the second network access signal level value is less than the first network access signal level value in step 713, the process returns to step 711 to maintain the first network connection.

In step 715, if the user is provided with handoff execution information to the second communication network, information about execution or non-execution of the handoff is received from the user, and handoff execution information is received from the user. In one case (step 716), the system information for the first communication network is stored (step 718), and a handoff to the second communication network is performed.

If the handoff non-execution information is received in step 716, the flow returns to step 711 to continue the connection with the first communication network (step 718).

As described above, the handoff method of the mobile communication terminal described with reference to FIGS. 5 to 7 may include all the contents of the handoff method according to the configuration of the mobile communication terminal described with reference to FIGS. 1 to 4.

While specific embodiments of the present invention have been described so far, various modifications are possible without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below, but also by the equivalents of the claims.

According to the mobile communication terminal and the handoff method of the present invention, when the mobile communication terminal performs a handoff, it provides the user with information about the handoff, and receives from the user whether to maintain or terminate the connected mobile communication service. Thus, the effect of providing a more efficient mobile communication service by the user's selection can be obtained.

Further, according to the mobile communication terminal and the handoff method of the present invention, before the mobile communication terminal performs the handoff, by providing the user with information about the communication network to perform the handoff to determine whether to perform the handoff By doing so, an effect of maximizing user convenience can be obtained.

In addition, according to the mobile communication terminal and the handoff method of the present invention, after the mobile communication service is terminated according to the handoff, when the communication network before the mobile communication service is ended again, the user is informed of the handoff information to the communication network. It is possible to obtain an effect of allowing the user to continuously receive the mobile communication service from the end time.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above-described embodiments, which can be variously modified and modified by those skilled in the art to which the present invention pertains. Modifications are possible. Accordingly, the spirit of the present invention should be understood only by the claims set forth below, and all equivalent or equivalent modifications thereof will belong to the scope of the present invention.

Claims (16)

In the mobile communication terminal performing a handoff, A network connection modem for connecting with at least one communication network; A communication unit for performing a mobile communication connection with a predetermined mobile communication system using the connected communication network; A handoff control unit performing a handoff from a first communication network connected through the communication network access modem to a second communication network; A user interface unit for providing handoff execution information to the second communication network to the user and receiving information on maintaining or terminating the mobile communication connection from the user; And A system information storage unit for storing system information on the first communication network when receiving mobile communication access termination information from the user; Mobile communication terminal comprising a. The method of claim 1, And the user interface unit provides the user with connection speed information with the first communication network or the second communication network. The method of claim 1, The handoff control unit compares the magnitude of the connection signal level value with the first communication network with the magnitude of the connection signal level value with the second communication network, so that the connection signal level value with the second communication network is connected with the first communication network. And the user is handed off to the second communication network when the access signal level is greater than the access signal level. The method of claim 1, And the communication unit terminates the mobile communication connection when receiving the termination information of the mobile communication connection from the user. The method of claim 1, When the mobile communication terminal performs a handoff to the second communication network and the mobile communication connection is terminated and the handoff to the communication network having the same system information as the first communication network system information is performed, the handoff is performed. And information on whether to reconnect to the mobile communication system where the connection is terminated. The method of claim 5, And the communication unit re-executes the mobile communication connection when receiving the reconnection information to the mobile communication system from the user. The method of claim 1, The communication network connection modem, EV-DO access modem for acquiring EV-DO communication network system information and connecting to the EV-DO communication network Mobile communication terminal comprising a. The method of claim 1, The communication network connection modem, 1x access modem for acquiring 1x communication network system information and performing connection with the 1x communication network Mobile communication terminal comprising a. The method of claim 1, The communication network connection modem, 2G access modem for acquiring 2G communication network system information and performing connection with the 2G communication network Mobile communication terminal comprising a. The method of claim 1, And the mobile communication connection comprises a call connection or a data connection to the mobile communication system. In the mobile communication terminal performing a handoff, A network connection modem for connecting with at least one communication network; A handoff execution information unit for generating handoff execution information to the second communication network when the value of the connection signal level of the first communication network connected through the communication network connection modem is smaller than that of the second communication network; A user interface unit providing information to the user on whether to perform handoff to the second communication network and receiving information on execution or non-execution of the handoff from the user; And A handoff control unit for performing a handoff to the second communication network when receiving the handoff execution information from the user and maintaining a connection with the first communication network when receiving the handoff non-execution information; Mobile communication terminal comprising a. The method of claim 11, A system information storage unit for storing system information on the first communication network when receiving handoff execution information from the user; A mobile communication terminal further comprising. In the handoff method of the mobile communication terminal, Maintaining a connection with the first communication network; Performing a mobile communication connection with a predetermined mobile communication system using the first communication network; Receiving a connection signal from a second communication network; Comparing the first network access signal level value with the second network access signal level value; Performing a handoff to the second communication network when the second network connection signal level value is greater than the first network connection signal level value; Providing a user with handoff execution information to the second communication network and information on maintaining or terminating the mobile communication connection; And When the mobile communication connection termination information is received from the user, storing system information on the first communication network and terminating the mobile communication connection. Handoff method of a mobile communication terminal comprising a. The method of claim 13, Performing a handoff to a third communication network; Providing the user with handoff information to the third communication network when the third communication network system information and the first communication network system information are the same; Providing the user with information on whether to reconnect to the mobile communication system where the connection is terminated; And When receiving the mobile communication reconnection information from the user, reconnecting to the mobile communication system The handoff method of a mobile communication terminal further comprising. In the handoff method of the mobile communication terminal, Establishing a connection with the first communication network; Receiving a connection signal from a second communication network; Comparing the first network access signal level value with the second network access signal level value; Generating handoff execution information to the second communication network if the second network connection signal level value is greater than the first network connection signal level value; Providing information to the user whether handoff is performed to the second communication network; Receiving information about the execution or non-execution of the handoff from the user; And When receiving the handoff execution information from the user, and stores the system information for the first communication network and executes the handoff to the second communication network, when receiving the handoff non-execution information, the first communication network Maintaining a connection with Handoff method of a mobile communication terminal comprising a. A computer-readable recording medium having recorded thereon a program for executing the method of claim 13.

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