JP2930104B2 - Mobile communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system, and more particularly, to an area (hospital, movie theater, concert hall, etc.) where use of a mobile station (mobile phone, PHS) is prohibited in a service area of a base station. The present invention relates to a mobile communication system capable of controlling use of a certain mobile station.

[0002]

2. Description of the Related Art In recent years, with the advance of advanced information technology, mobile communication systems have attracted attention, and mobile phones, car phones, PHS (Personal Handy Phone System), pagers, and MCA.
Various implementations such as wireless have been realized. Among them, mobile phones, P
HS had a total of 2000 subscribers at the end of October 1996.
It is a market where more than a million people are expected to grow further.

[0003] However, as the number of subscribers has increased, the problem of radio waves transmitted from mobile phones or PHS and the problem of sound pollution have been pointed out through the media and the like.

As the former example (problem of radio waves), for example,
There is a problem between the plane and the mobile station. Since airplanes use various radio waves to control takeoff and landing, it is said that radio waves from mobile stations (cellular phones, PHS) show abnormalities on the instruments of the airplane and cause airplane accidents. actually,
An airplane accident caused by mobile station radio waves was reported in the media.

Further, it has been reported that a malfunction occurs when a mobile station is brought close to a measuring instrument in a hospital. Currently, these radio wave problems are addressed simply by putting posters that prohibit the use of mobile stations in airplanes and hospitals, and by urging the use of mobile stations in announcements in the venue.

[0006] An example of the latter (sound pollution) relates to the ringing and speaking of mobile phones or PHS in quiet public places such as movie theaters or concert halls. This problem is similar to the problem of radio waves, and it is only urging the power of the mobile station to be turned off by a poster or an announcement in the hall prohibiting the use of the mobile station in a movie theater or a concert hall.

Japanese Patent Application Laid-Open No. 4-74094 describes a method of controlling the use of a mobile station by limiting the use of a mobile station to an existing base station in units of area, and using the control method to control the use of the mobile station. Places prohibited (in airplanes, hospitals,
Or the use of mobile stations in movie theaters, etc.), the use of mobile stations is restricted by the area of existing base stations, so that the range of use restriction control is widened and the use of mobile stations is restricted. The use of mobile stations is restricted even in non-prohibited locations (airfield lobby and outside hospitals).

[0008]

As described above, according to the control method described in Japanese Patent Application Laid-Open No. 4-74094, when the use of a mobile station is restricted in a mobile station use prohibited area (location), use is prohibited. Usage restrictions extend to mobile stations located in adjacent areas (locations) that do not. As a result, there is a problem that the convenience of the mobile communication system is impaired.

An object of the present invention is to provide a mobile communication system capable of prohibiting or suppressing the use of only mobile stations located in a mobile station use prohibited area (location).

[0010]

According to the present invention, in a mobile communication system including a base station for defining a predetermined service area and a mobile station for communicating with the base station, A small base station arranged to define a predetermined prohibited area; and a first means for monitoring radio waves from the mobile station located in the prohibited area; A second means for requesting the base station to stop a paging channel when receiving a radio wave from a station; and a second means for calling the mobile station using the paging channel and sending a use prohibition message to the mobile station. 3 is provided, and the mobile station is provided with display means for displaying the use prohibition message.

Further, the present invention may further comprise means for transmitting the use prohibition message to the small base station and then transmitting a forced power-off command to the base station using the paging channel. The mobile station is provided with power-off means for turning off the power in response to the forced power-off command. Then, after the use prohibition message is transmitted, the small base station transmits a transmission stop release of the single voice call channel to the base station.

According to the present invention, when a mobile station enters a use prohibited area and a small base station installed in advance detects radio waves of the mobile station, the mobile station uses the mobile station within the use prohibited area. A text message for prohibition can be transmitted to urge power off and forcibly power off the mobile station.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

Referring to FIG. 1, the illustrated mobile communication system includes a base station 8 having a predetermined service area and a small base station 7.
Is provided. The base station 8 is connected to the mobile communication network 10
It is connected to the.

The use prohibited area (place) 11 is defined by the small base station 7. That is, the base station 8 is an existing base station, and the small base station 7 is installed in the use prohibited area of the mobile station 1 or at the entrance of the use prohibited area.

The small base station 7 includes an antenna 3 having low transmission power and strong directivity, and a call request / location registration request transmitted from the mobile station 1 so that the radio wave does not affect the outside. A receiving unit 4 for receiving channel information transmitted from the base station 8 and a use prohibition request to the mobile station 1 and a paging channel (PC
A transmission unit 5 for transmitting the transmission stop request of H) and a data storage unit 6 for storing a text message to be transmitted to the mobile station 1 and a forced power-off request. Therefore, as will be described later, when the mobile station 1 has only a function of displaying a text message, the mobile station 1 receives a text message indicating that use is prohibited, and the mobile station 1 receives a forced power-off command. In the case where the mobile station has a function, the power of the mobile station can be turned off from the base station side.

Here, referring also to FIGS. 2 and 3, first,
The small base station 7 is installed in the use prohibited area of the mobile station or at the entrance thereof. When the power of the small base station 7 is turned on (step 20), the small base station 7 receives the broadcast channel (BCCH) transmitted from the existing base station 8 and recognizes the channel structure of the wireless space (step 21). ). Then, the small base station 7 enters a state of monitoring radio waves from the mobile station 1 (step 22). Thereafter, upon receiving a radio wave such as a call request or location registration from the mobile station 1 (step 23), the small base station 7 transmits a paging channel (PCH) stop request to the base station 8 to transmit the request. (Step 24). Thereafter, the small base station 7 calls the mobile station 1 using the PCH in synchronization with the channel structure of the wireless section (step 25), and the mobile station 1 receives a character such as "Please turn off the power at this location." A message is sent (step 26). Thereafter, the small base station 7 transmits a compulsory power-off command to the mobile station 1 (step 2).
7) Paging channel (PCH) for base station 8
Is transmitted to confirm the PCH transmission stop release response from the base station 8 (step 28). After that, the process returns to step 22 to monitor radio waves from the mobile station.

Now, assuming that the mobile station 1 has a function of displaying a text message on a display and a function of recognizing a forced power-off command from a small base station, it is assumed that the mobile station 1 has a small mobile station installed in an area where use of the mobile station is prohibited. When the power of the base station 7 is turned on, a broadcast channel (BC) transmitted from the base station 8 is transmitted.
CH), and recognizes the radio channel used by the mobile station, and monitors radio waves from the mobile station.

At this time, if the condition of radio waves from the base station 8 is good and control information such as location registration is difficult to be transmitted from the base station 8, a wall or the like that artificially blocks external radio waves is removed from the mobile station. The control information such as location registration is transmitted by making the mobile station worse in the radio wave condition. Thereby, the small base station 7 recognizes that the mobile station 1 is in the use prohibited area. Thereafter, the small base station 7 becomes the base station 8
In order to prevent collision of the paging channel (PCH), a PCH transmission stop request is transmitted and a response from the base station 8 is confirmed.

Thereafter, the small base station 7 sends a call request to the mobile station 1 using the paging channel (PCH) to the mobile station 1, and transmits a text message to forcibly turn off the power. Further, the small base station 7 transmits a compulsory power-off command to the mobile station 1 and turns off the power of the mobile station 1. afterwards,
The small base station 7 requests the base station 8 to release the stoppage of the paging channel (PCH) transmission, confirms a response from the base station 8, monitors radio waves from the mobile station again, and performs the above operation. repeat.

In the above example, the mobile station has been described as having a function of displaying a text message on a display and a function of recognizing a forced power-off command from the small base station. Even if it does not have the function of recognizing, in general, it has a function of displaying a text message on the display, so a small base station sends a text message urging use prohibition and prompts the user to turn off the power be able to.

As described above, according to the above-described example, even when the user inadvertently forgets to turn off the power in an airplane, a hospital, a movie theater, or the like, which is an area (place) where mobile stations are prohibited from being used, the base station can be used. The side can prompt the mobile station to turn off the power by a text message, or the base station can forcibly turn off the power of the mobile station. As a result, it is possible to prevent radio wave problems, sound pollution problems, and the like.

[0023]

As described above, according to the present invention, a small base station having low transmission power and high directivity is installed in a mobile station prohibited area or at the entrance thereof, and the small base station receives radio waves from the mobile station. When a mobile station is detected, a command to forcibly turn off the power is sent to the mobile station, so areas affected by the mobile station's radio waves, such as in airplanes or hospitals, concert halls or movie theaters, etc. If the user forgets to turn off the mobile station in a quiet public place, the power can be forcibly turned off, resulting in airplane accidents caused by mobile station radio waves and accidents caused by malfunctions of medical equipment in hospitals. ,
In addition, there is an effect that unwanted calls in a quiet public place can be eliminated.

Even when the mobile station does not have a function of recognizing the forced power-off command, the mobile station generally has a function of displaying a text message on a display. If the base station detects a radio wave from the mobile station and sends a text message to prohibit use to the mobile station, it forgets to turn off the power of the mobile station that does not have the forced power off recognition function. Even in this case, a text message urging the user to turn off the power is transmitted, and it is highly expected that the user will turn off the power voluntarily.The airplane accident due to the radio wave of the mobile station and the accident due to the malfunction of the medical device in the hospital, In addition, there is an effect that nuisance calls in a quiet public place can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a mobile communication system according to the present invention.

FIG. 2 is a diagram showing a control sequence of the mobile communication system shown in FIG.

FIG. 3 is a flowchart for explaining the operation of the small base station shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mobile station 2, 3, 9 Antenna 4 Receiving part 5 Transmitting part 6 Data storage part 7 Small base station 8 Base station 10 Mobile communication network 11 Unusable area (location)

Claims (4)

(57) [Claims] 1. A mobile communication system including a base station that defines a predetermined service area and a mobile station that communicates with the base station, the mobile station being located within the service area and defining a predetermined use prohibited area. A small base station is provided, the small base station has first means for monitoring radio waves from the mobile station located in the prohibited area, and the base station receives radio waves from the base station. Second means for making a request to stop the paging channel, and third means for calling the mobile station using the paging channel and sending a use prohibition message to the mobile station. A mobile communication system, characterized in that the station is provided with display means for displaying the use prohibition message. 2. The mobile communication system according to claim 1, wherein when the small base station is powered on, the small base station receives a broadcast channel transmitted from the base station and recognizes a channel structure in a wireless space. A mobile communication system, comprising: fourth means, wherein the third means calls the mobile station using the paging channel in synchronization with the channel structure. 3. The mobile communication system according to claim 1, wherein said small mobile station transmits said use prohibition message to said small mobile station, and forcibly powers off said base station using said paging channel. 6th sending command
Means, wherein the mobile station is provided with power-off means for turning off the power in response to the forced power-off command. 4. The mobile communication system according to claim 3, wherein the small base station transmits to the base station, after the forced power-off command is transmitted, a release of the transmission stop of the voice call channel. A mobile communication system comprising a fifth means.