KR101117906B1 - Method for providing and using mobile internet service - Google Patents

Abstract

The present invention relates to a method of providing a mobile Internet service of an outdoor base station and an indoor base station and a method of using a mobile Internet service of a terminal in a portable internet system including an outdoor base station and an indoor base station. According to this technique, transmitting recognition information about a base station group included in a service area of an outdoor base station and including a first and a second indoor base station to a terminal; And transmitting a first mode change message to the second indoor base station according to whether the terminal detects a signal of the first indoor base station using the recognition information. The indoor base station is a base station of a first power saving or active mode, and the mode of the second indoor base station to which the terminal is registered for service is a second signal transmission interval smaller than the first power saving mode according to the first mode change message. Change from sleep mode to active mode.

Mobile Internet, Indoor Base Station

Description

How to provide and use mobile Internet service {METHOD FOR PROVIDING AND USING MOBILE INTERNET SERVICE}

The present invention relates to a method for providing and using a portable Internet service, and more particularly, to a method for providing a portable Internet service of an outdoor base station and an indoor base station and a method of using a portable Internet service of a terminal.

A portable Internet system such as a wibro system is a system that can obtain and utilize a variety of information and contents by accessing the Internet at a high transmission speed even in a mobile state regardless of a place or time using a portable wireless terminal. Therefore, like the existing cellular communication systems, the portable Internet system supports handover from an outdoor base station to an indoor base station to ensure mobility of wireless terminals.

Indoor base station is also called femto cell (Femto Cell), a small base station that provides a communication service for a relatively small area, also called a Home Node-B (Home Node-B). The indoor base station may be divided into an open subscriber group (OSG) indoor base station allowing access to all users and a closed subscriber group (CSG) indoor base station allowing access only to specific registered users, according to a usage purpose.

In a portable Internet system using an indoor base station, a method of switching a mode of an indoor base station based on an outdoor base station is used to reduce the power consumption and interference of the indoor base station due to the additional configuration of the indoor base station. The indoor base station may operate in an active mode and a power saving mode. When the Internet service is provided to the terminal, the indoor base station operates in the active mode. When the Internet base station is not provided to the terminal, the indoor base station operates in the power saving mode. And interference can be reduced.

For example, in the power saving mode, there is a low duty cycle (LDC) mode. In the LDC mode, the indoor base station periodically transmits a preamble so that the UE can detect its presence. The interval for transmitting the preamble in the LDC mode is called an available interval, and the interval for not transmitting the preamble is called an unavailable interval. If the unavailable interval becomes very long, it may be a power off mode. When the terminal detects the preamble of the indoor base station and requests a service, the indoor base station may switch to the active mode to provide the mobile Internet service. In the active mode, since the indoor base station always transmits a preamble, the terminal can detect the presence of the indoor base station and use the portable Internet service.

If the available interval is set too long, the interference is increased in the surrounding indoor base stations and a coverage hole due to the interference may occur. On the contrary, if the available interval is set too short, it may be difficult for the terminal to detect the indoor base station, which may cause a problem in providing the mobile Internet service. Considering the location and characteristics of the indoor base station and the wireless environment, it is difficult to optimally set the interval in which the indoor base station transmits a preamble, thereby reducing power consumption of the indoor base station and reducing interference between the indoor base stations. An effective way is necessary.

The present invention has been proposed to solve the above problems, and provides a method of providing and using a mobile Internet service that can reduce power consumption of an indoor base station, reduce interference between indoor base stations, and provide a mobile Internet service. There is this.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

The present invention for achieving the above object, the base station included in the service area of the outdoor base station and including the first and the second base station base station information for transmitting to the terminal; And transmitting a first mode change message to the second indoor base station according to whether the terminal detects a signal of the first indoor base station using the recognition information. The indoor base station is a base station of a first power saving or active mode, and the mode of the second indoor base station to which the terminal is registered for service is a second signal transmission interval smaller than the first power saving mode according to the first mode change message. Change from sleep mode to active mode.

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In addition, the present invention for achieving the above object, in a method of using a wireless Internet service of the terminal, the terminal is included in the service area of the base station for the outdoor access is connected to the base station group including the first and second indoor base station Receiving identification information from the outdoor base station; Transmitting a notification message for detecting a signal of the first indoor base station in a first sleep or active mode by using the recognition information to the outdoor base station or the first indoor base station; And 'the second change from the second power saving mode in which the signal transmission interval is smaller than the first power saving mode to the active mode according to the mode change message transmitted from the outdoor base station or the first indoor base station in response to the notification message. And performing the handover to the second indoor base station.

According to the present invention, a plurality of indoor base stations form a base station group, and only one indoor base station of the base station group transmits a signal so that the terminal can recognize the existence of the base station group, thereby reducing power consumption of the indoor base station. It can reduce the interference between indoor base stations.

DETAILED DESCRIPTION Hereinafter, the most preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art may easily implement the technical idea of the present invention. The above objects, features, and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, and in describing the present invention, a detailed description of well-known technology related to the present invention may unnecessarily obscure the subject matter of the present invention. If it is determined that the detailed description thereof will be omitted.

1 is a view for explaining a portable Internet system according to an embodiment of the present invention.

As shown in FIG. 1, the portable Internet system according to the present invention includes an outdoor base station 101, groups of first to third base stations 103, 105, and 107, a terminal 109, and a central server 111. . Each of the first to third base station groups 103, 105, and 107 includes a plurality of indoor base stations, and is connected to the central network server 111 providing the Internet service by wire to provide the mobile Internet service to the terminal 109. to provide.

According to the present invention, only one indoor base station 113, 115, 117, called a header, among the indoor base stations included in the first to third base station groups 103, 105, and 107 in the active mode or the first power saving mode. The remaining indoor base station operates in the second sleep mode. Each of the headers 113, 115, and 117 of the first to third base station groups 103, 105, and 107 transmits a signal according to its power saving mode to a preset area. Here, the power saving mode may be an LDC mode, and the signal according to the power saving mode may be a preamble transmitted periodically. The second power saving mode is a mode in which a signal transmission interval is smaller than that of the first power saving mode. That is, the second power saving mode is a mode having a less available interval and more unavailable intervals than the first power saving mode, and may be an LDC mode or a power off mode. In FIG. 1, a dotted line indicating each of the first to third base station groups 103, 105, and 107 becomes a preset area, and the preset area may vary depending on the signal strength according to the active or first power saving mode.

When the terminal 109 enters one of the preset areas, that is, when entering the one of the first to third base station groups 103, 105, and 107, the terminal 109 according to the preamble detection of the terminal. The indoor base station registered with this service is changed from the second power saving mode to the active mode, and the indoor base station in the active mode can provide the portable Internet service to the terminal 109. In this case, the mode change of the indoor base station may be controlled by the headers 113, 115, and 117 or the outdoor base station 101.

That is, according to the present invention, all indoor base stations do not need to be in a power saving mode or an active mode unlike the related art, and since the indoor base stations in the power saving or active mode can be provided in a very reduced state, The power consumption of the indoor base station can be reduced, and the interference problem between indoor base stations can be reduced.

According to the present invention, since the header replaces the preamble transmission of the remaining indoor base stations, it is preferable that the strength of the notification signal is adjusted so that the preset area includes all the service areas of each indoor base station of each base station group.

In FIG. 1, a portable Internet system including three base station groups has been described as an embodiment. However, the number of base station groups may vary according to the number of indoor base stations or a wireless environment. The header selection method and the mode changing method of the indoor base station will be described in more detail below.

2 is a view for explaining a specific embodiment in which the portable Internet service is provided in the portable Internet system according to the present invention.

In FIG. 2, the case where the terminal 109 enters the first base station group 103 is described as an embodiment. In FIG. 2, the first header 113 is set to the LDC mode and periodically transmits a signal (preamble) according to the LDC mode so that the terminal 109 can detect the first header 113. The mode of the indoor base station other than 113 is a power off mode, as one embodiment.

1. The terminal 109 enters the service area 201 of the outdoor base station 101 and connects to the outdoor base station 101. The first base station group 103 is included in the service area of the outdoor base station 101.

2. The outdoor base station 101 transmits identification information for the first base station group 103 to the terminal 109. The recognition information may include identification information (physical ID) and frequency (FA) information about the first header 113. The terminal 109 may recognize the preamble of the first header 113 by using the recognition information.

3. The terminal 109 enters the area of the first base station group 103. Here, the area of the first base station group 103 is an area in which the strength of the preamble of the first header 113 is greater than or equal to a preset threshold value. When the strength of the preamble is greater than or equal to the threshold value, the first header ( The preamble of 113 may be detected.

4. The terminal 109 scans the preamble of the first header 113 by using the recognition information.

5. As a result of scanning, when the terminal 109 detects the preamble of the first header 113, the terminal 109 transmits a notification message for the detection of the signal to the outdoor base station (101).

6. The outdoor base station 101 transmits a mode change message to the indoor base station 203 in order to switch the mode of the indoor base station 203 to which the terminal 109 is registered with the service from the power off mode to the active mode.

7. The terminal 109 enters the service area of the indoor base station 203 and scans the signal of the indoor base station 203 switched to the active mode.

8. The terminal 109 performs a handover from the outdoor base station 101 to the indoor base station 203 and receives a portable Internet service from the indoor base station 203. When the terminal 109 leaves the service area of the indoor base station 203, the indoor base station 203 is set back to the power off mode.

1 and 2 illustrate a case in which the header is in the LDC mode and the remaining indoor base station is in the power-off mode, but according to the system design, the header is in the active mode and the remaining indoor base station is in the power saving mode. Can be. Alternatively, both the header and the indoor base station may be in a power saving mode, but the header may be in a power saving mode in which an available interval is longer than the remaining indoor base stations. Hereinafter, a mobile internet service providing method of an outdoor base station and an indoor base station and a mobile internet service using method of a terminal will be described in detail with reference to FIGS. 1 and 2.

3 is a view for explaining a mobile Internet service providing method of an outdoor base station according to an embodiment of the present invention.

As shown in Fig. 3, the method for providing a portable Internet service according to the present invention starts from step S301.

In step S301, the outdoor base station transmits identification information on the base station group included in the service area of the outdoor base station and including the first and second indoor base stations to the terminal. Here, the first indoor base station corresponds to the aforementioned header and is in an active or first sleep mode. The second indoor base station corresponds to the indoor base station, not the header in the base station group, and is a base station to which the terminal is registered. The second indoor base station is in a first sleep mode. The recognition information may be identification information and frequency information of the first indoor base station, and the terminal may detect a signal of the first indoor base station using the recognition information.

In step S303, the outdoor base station transmits the first mode change message to the second indoor base station according to whether the terminal detects the signal of the first indoor base station using the recognition information. Here, the signal of the first indoor base station is a signal according to the power saving mode of the first indoor base station, and may be a preamble transmitted periodically. The second indoor base station in which the terminal is registered with the service is changed from the second sleep mode to the active mode in response to the first mode change message.

More specifically, when the terminal detects the signal of the first indoor base station in step S303, the outdoor base station receives a notification message for detecting the signal of the first indoor base station from the terminal. The outdoor base station transmits the first mode change message to the second indoor base station in response to the notification message.

As a result, the terminal can be provided with the portable Internet service from the second indoor base station changed to the active mode. Since both the first and second indoor base stations do not transmit the preamble, or because the second indoor base station can transmit the preamble in a small signal transmission interval, power consumption of the entire indoor base stations is reduced, and the first and second indoor base stations are reduced. Interference between indoor base stations can be reduced.

Meanwhile, in FIG. 3, the case where the base station group includes the first and second indoor base stations is described as an embodiment. However, the base station group is changed from the second sleep mode to the active mode according to the first mode change message. The service may further include a third indoor base station registered.

At this time, according to the present invention, the outdoor base station transmits the first mode change message to the third indoor base station in response to the received notification message. The outdoor base station transmits a second mode change message for changing the mode of the base station to which the terminal is not handed over from the second and third indoor base stations to the second power saving mode to the base station to which the terminal is not handed over.

For example, when the terminal is close to the second indoor base station and hands over to the second indoor base station, the outdoor base station transmits a second mode change message to the third indoor base station, The mode may be changed back to the second power saving mode. At this time, the second indoor base station may transmit the information that the terminal handed over to the second indoor base station to the outdoor base station.

4 is a diagram illustrating a method for providing a portable Internet service of an indoor base station according to an embodiment of the present invention. According to the present invention, a header may be selected or changed between a plurality of indoor base stations.

As shown in Fig. 4, the portable Internet service providing method according to the present invention starts from step S401.

In step S401, the indoor base station compares its signal strength with a plurality of indoor base station signals included in the preset outdoor base station service area. That is, according to the present invention, an indoor base station may be selected as a header by comparing signal strengths with a plurality of indoor base stations.

In step S403, the indoor base station is set to an active or second power saving mode according to the comparison result of step S401. For example, the first power saving mode may be an LDC mode and may be set to an active mode according to a system design. When the indoor base station is set to the first sleep mode, a plurality of other indoor base stations are set to the second sleep mode. If both the first indoor base station and the other plurality of indoor base stations are in active mode, the indoor base station is changed to the second power saving mode. The other plurality of indoor base stations remain in active mode. And the indoor base station and the plurality of indoor base stations form one base station group.

In operation S405, the indoor base station transmits a signal based on an active or first power saving mode to a preset area. The signal according to the first power saving mode may be a preamble transmitted periodically, and the preset area preferably includes all the service areas of the indoor base station set to the second power saving mode.

That is, according to the present invention, the indoor base station may be selected as a header by comparing the signal strength with the surrounding indoor base station and set to an active or first power saving mode. The plurality of indoor base stations are set to the second power saving mode.

Meanwhile, the method for providing a portable Internet service according to the present invention may further include steps S407 and S409.

If another indoor base station is added to the service area of the outdoor base station in step S407, the indoor base station selected as the header compares the signal strength with the added indoor base station again. According to the comparison result at step S409, the indoor base station selected as the header is changed from the active or first sleep mode state to the second sleep mode state. That is, if the signal strength of the added indoor base station is greater than the signal strength of the indoor base station selected as the header, the mode of the indoor base station selected as the header is changed to the second power saving mode, and the added indoor base station is set to the header. Becomes

FIG. 5 is a diagram illustrating a method for providing a portable Internet service of an indoor base station according to another embodiment of the present invention. In FIG. 5, when a first indoor base station is installed, a header is selected between a plurality of indoor base stations. The method of change is described.

As shown in Fig. 5, the portable Internet service providing method according to the present invention starts from step S501.

In step S501, the indoor base station receives a signal according to an active or first sleep mode from a plurality of indoor base stations included in the outdoor base station service area. That is, the plurality of indoor base stations are headers which periodically transmit the preamble according to the first sleep mode or continuously transmit the preamble according to the active mode.

In step S503, the indoor base station compares the strength of the signal according to the active or first sleep mode with a preset threshold. Here, the threshold value is a reference value for the indoor base station to be selected as a new header.

In step S505, the indoor base station is set to the second power saving mode according to the comparison result of step S503. That is, when the strength of the preamble according to the first sleep mode is less than or equal to a preset threshold, the indoor base station becomes a header and is set to an active or second sleep mode, and transmits the preamble. When the strength of the preamble according to the first power saving mode is less than or equal to a preset threshold, the indoor base station is set to the second power saving mode. In this case, the indoor base station may be included in the base station group of the header transmitting the strongest preamble.

According to the present invention, it can be seen that the header may be selected or included in an existing base station group according to the preamble strength around the indoor base station. When the indoor base station is set to the second power saving mode, it can be changed to the active mode according to the mode change message of the outdoor base station to provide the mobile Internet service to the terminal.

That is, in step S507, when the terminal registered with the indoor base station set to the second power saving mode according to the comparison result detects a signal according to the active or first power saving mode of the header, the indoor base station set to the second power saving mode Receives the mode change message from the outdoor base station. The indoor base station set to the second power saving mode in step S509 is changed to the active mode according to the mode change message.

Meanwhile, the terminal may be registered with a plurality of indoor base stations included in the base station group. In this case, the indoor base station set to the active mode according to the mode change message determines whether the terminal is handed over to itself for a preset time. The indoor base station set to the active mode is changed back to the second power saving mode according to the determination result. If it is not handed over for a predetermined time, it can be considered that the handover to another indoor base station, the indoor base station changes the mode to the second power saving mode again.

6 is a view for explaining a method of using a mobile Internet service of the terminal according to an embodiment of the present invention.

As shown in Fig. 6, the method for using the portable Internet service according to the present invention starts from step S601.

In step S601, the terminal receives, from the outdoor base station, identification information about the base station group included in the service area of the outdoor base station to which the terminal is connected and including the first and second indoor base stations. The terminal may detect the signal of the base station group using the recognition information.

In step S603, the terminal transmits a notification message for detecting the signal of the first indoor base station in the active or first sleep mode to the outdoor base station or the first indoor base station using the recognition information. In more detail, the terminal scans the signal of the first indoor base station using the recognition information. When the terminal detects the signal of the first indoor base station as a result of scanning, the terminal transmits a notification message to the outdoor base station or the first indoor base station. That is, the terminal may recognize that the terminal has entered the base station group by the signal detection of the first indoor base station, and transmits the fact to the outdoor base station or the first indoor base station, so that the terminal may receive the Internet service.

In step S605, the terminal performs a handover to the second indoor base station changed from the second sleep mode to the active mode according to the mode change message transmitted from the outdoor base station or the first indoor base station in response to the notification message. The second indoor base station is an indoor base station in which a terminal is registered with a service. Since the second indoor base station is changed to an active mode, the second indoor base station can detect the second indoor base station and handover to the second indoor base station.

7 is a view for explaining a portable Internet system according to a specific embodiment of the present invention.

FIG. 7 is a diagram illustrating a case in which indoor base stations are installed in a building and an indoor base station on the first floor operates as a header. As shown in FIG. 7, a header 711 set to a power saving mode and a plurality of indoor base stations 701, 703, 705, 707, and 709 set to a power off mode are installed in a building for each floor. To form. The header 711 periodically transmits a preamble.

When the indoor base station 711 on the first floor is designated as a header to operate, the mobile terminal 713 must pass the first floor, and thus the preamble can be easily recognized from the header 711 on the first floor. The terminal 713 transmits the preamble recognition result to the outdoor base station or the header 711, and the outdoor base station or the header 711 indicates that the mode of the indoor base station to which the terminal 713 is registered is changed from the power off mode to the active mode. Control as possible.

The terminal 713 may receive a portable Internet service by handing over to an indoor base station changed to an active mode.

As mentioned above, although the present invention has been described in terms of devices, each step of configuring a method for providing and using a portable Internet service according to the present invention can be easily understood from a device point of view. Therefore, the steps included in the method for providing and using the portable Internet service according to the present invention are understood as components included in the outdoor base station, the indoor base station, and the terminal using the portable Internet service, respectively, in accordance with the principles of the present invention. Can be.

That is, the outdoor base station that provides the mobile Internet service includes a first transmitter that transmits recognition information about the base station group included in the service area of the outdoor base station and including the first and second indoor base stations to the terminal, and the recognition information. And a second transmitter for transmitting the first mode change message to the second indoor base station according to whether the terminal detecting the signal of the first indoor base station detects the signal. The first indoor base station is a base station of a first power saving or active mode, and the mode of the second indoor base station in which the terminal is registered with a service has a signal transmission interval longer than that of the first power saving mode according to the first mode change message. Change from small second sleep mode to active mode.

In addition, the indoor base station that provides the mobile Internet service is a comparison unit for comparing the signal strength with a plurality of indoor base station signals, which are not the indoor base station included in the service area of the outdoor base station, according to the comparison result, the indoor base station And a setting unit for setting a signal to an active or first power saving mode, and a transmitter for transmitting a signal according to the active or first power saving mode to a predetermined area, wherein the plurality of indoor base stations have a signal transmission interval than the first power saving mode. The small second power saving mode is set.

In addition, the indoor base station for providing a mobile Internet service is a receiving unit for receiving a notification signal indicating an active or first sleep mode from a plurality of indoor base stations, not the indoor base station, included in the outdoor base station service area, the active or A comparison unit comparing the strength of the signal according to the first power saving mode with a preset threshold value, and a setting unit configured to set the indoor base station to a second power saving mode having a smaller signal transmission interval than the first power saving mode according to the comparison result. .

In addition, the terminal using the portable Internet service includes a receiving unit and recognition information for receiving from the outdoor base station recognition information for the base station group included in the service area of the outdoor base station to which the terminal is connected and including the first and second indoor base stations. A transmission unit for transmitting a notification message for detecting a signal of the first indoor base station in the first sleep or active mode to the outdoor base station or the first indoor base station, and from the outdoor base station or the first indoor base station in response to the notification message. According to the mode change message transmitted, the handover unit for performing a handover to the second indoor base station is changed to the active mode from the second sleep mode, the signal transmission interval is smaller than the first sleep mode.

On the other hand, the mobile Internet service providing and using method according to the present invention as described above can be written in a computer program. And the code and code segments constituting the program can be easily inferred by a computer programmer in the art. In addition, the written program is stored in a computer-readable recording medium (information storage medium), and read and executed by a computer to implement the method of the present invention. And the recording medium includes all types of recording media (intangible medium such as a carrier wave as well as tangible media such as CD and DVD) readable by a computer.

Although the present invention has been described by means of limited embodiments and drawings, the present invention is not limited thereto and is intended to be equivalent to the technical idea and claims of the present invention by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible.

1 is a view for explaining a portable Internet system according to an embodiment of the present invention;

2 is a view for explaining a specific embodiment in which the portable Internet service is provided in the portable Internet system according to the present invention;

3 is a view for explaining a mobile Internet service providing method of an outdoor base station according to an embodiment of the present invention;

4 is a view for explaining a mobile Internet service providing method of an indoor base station according to an embodiment of the present invention;

5 is a view for explaining a mobile Internet service providing method of an indoor base station according to another embodiment of the present invention;

6 is a view for explaining a method of using a mobile Internet service of the terminal according to an embodiment of the present invention;

7 is a view for explaining a portable Internet system according to a specific embodiment of the present invention.

Claims (15)

Transmitting identification information about a base station group included in a service area of an outdoor base station and including a first base station and a second indoor base station to a terminal; And And transmitting a first mode change message to the second indoor base station according to whether the terminal detects a signal of the first indoor base station using the recognition information. The first indoor base station is a base station of a first power saving or active mode, and the mode of the second indoor base station in which the terminal is registered with a service has a signal transmission interval longer than that of the first power saving mode according to the first mode change message. A portable Internet service providing method of an outdoor base station, which is changed from a small second power saving mode to an active mode. The method of claim 1, The step of transmitting the first mode change message to the second indoor base station, When the terminal detects a signal of the first indoor base station, receiving a notification message for signal detection from the terminal; And Transmitting the first mode change message to the second indoor base station in response to the notification message. Mobile Internet service providing method of an outdoor base station comprising a. 3. The method of claim 2, The base station group, And a third indoor base station which is changed from the second power saving mode to an active mode according to the first mode change message, and wherein the terminal has a service registered therein. The method of claim 3, In response to the received notification message, transmitting the first mode change message to the third indoor base station; And Among the second and third indoor base stations, a second mode change message for changing a mode of a 'base station to which the terminal does not handover' to the second power saving mode is transmitted to a 'base station to which the terminal does not handover'. Steps to The mobile Internet service providing method of the outdoor base station further comprising. The method of claim 1, The first and second power saving mode, A portable Internet service providing method of an outdoor base station, which is in a low duty cycle (LDC) mode. The method according to any one of claims 1 to 5, The recognition information, A mobile Internet service providing method of an outdoor base station, comprising identification information and frequency information for the first indoor base station. delete delete delete delete delete delete delete In the method of using a wireless Internet service of the terminal, Receiving, from the outdoor base station, identification information on a base station group included in a service area of an outdoor base station to which the terminal is connected, and including a first and a second indoor base station; Transmitting a notification message for detecting a signal of the first indoor base station in a first sleep or active mode by using the recognition information to the outdoor base station or the first indoor base station; And According to the mode change message transmitted from the outdoor base station or the first indoor base station in response to the notification message, the second power saving mode is changed to the active mode from the second power saving mode is smaller than the first power saving mode Performing a handover to an 'indoor base station' Method of using a mobile Internet service of the terminal comprising a. 15. The method of claim 14, The step of transmitting the notification message to the outdoor base station or the first indoor base station, Scanning the signal of the first indoor base station using the recognition information; And Transmitting a notification message to the outdoor base station or the first indoor base station when the signal of the first indoor base station is detected as a result of the scanning; Method of using a mobile Internet service of the terminal comprising a.

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