JP3291489B2 - Mobile phone system controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone system, and more particularly to a base station constituting a portable telephone system for a business office and a system control device for controlling the portable telephone system.

[0002]

2. Description of the Related Art A second-generation cordless telephone system (Personal Handy Phone System: PHS) has been proposed as a portable telephone system in which a single portable telephone can be used to make a telephone call in all situations at home, business, and outdoors. Practical application is underway. Here, the PHS is developing a mobile phone system for business use, and the mobile phone system for business use in the PHS is a private branch exchange connected to a public network and one or more private branch exchanges connected to the private branch exchange. A base station for business use, and each mobile phone is wirelessly connected to the base station for business use.

Here, when a call request is made by a portable telephone, a link channel request is made to a predetermined base station according to the reception level and the like, and in response to this, the exchange side transmits the request via the base station. Link channel assignment is performed.
Further, in a mobile phone system in which a home base station or a public base station is connected to a public network and a call is made by a mobile phone via the home base station or the public base station, when a call request is made from the mobile phone, A link channel request is made via a predetermined base station according to the reception level or the like, and a link channel is assigned from the public network via the base station in response to the request.

[0004] As a prior art, Japanese Patent Laid-Open No. 5-161 is disclosed.
As shown in No. 176, when the mobile station needs to switch the busy channel, if the mobile channel cannot be used according to the wireless communication channel availability information sent from the base station, In some cases, a communication channel switching request is not made, and as shown in Japanese Patent Application Laid-Open No. 2-44931, the wireless zone is divided into a general zone and a specific subscriber priority zone for restricting traffic. Notify the station that it is a normal wireless zone,
In the specific subscriber priority zone, there is disclosed a zone for notifying whether or not traffic control is being performed. further,
As disclosed in Japanese Patent Laid-Open No. 5-63641, there is disclosed a zone movement method for displaying, when all the communication channels in a destination zone of a radio telephone are in use, that the radio telephone indicates that all the communication channels are in use. ing.

[0005]

However, base stations such as office base stations have a limited number of communication channel lines.
Even if a call request is made via a certain base station, the communication line cannot be connected if all the communication channels of the base station are used. Such a situation occurs not only when the communication channel of the calling base station is blocked but also when the communication channel of the called base station is blocked.

Accordingly, the present invention provides a portable telephone system capable of giving a user of a portable telephone a communication opportunity even if a communication line of a certain base station is blocked, and a portable telephone system control device included therein. The purpose is to do so.

[0007]

Means for Solving the Problems The present invention was been created in order to solve the above problems, there in cellular telephone system control apparatus connected to a plurality of base stations connected mobile terminal and the radio A vacant channel information storage unit 22 for storing information on whether or not a communication channel of each base station in the plurality of base stations is available; and an area storage unit for storing a plurality of areas nearest to the area of each base station. 26, a notification information storage unit 20 for storing notification information indicating a position of an area of each base station, and a calling side in the portable terminal.
Outgoing call based on whether the base station's communication channel is available
When an output signal output by a call enablement confirmation operation for determining whether or not communication is possible is transmitted through a predetermined base station, whether or not the communication channel of the base station is available The call availability determination means 16 for determining whether or not the call is available by the empty channel information storage unit, and when the call is not possible by the call availability determination unit, the area nearest to the base station is stored in the area storage unit. The nearest area determining means 24 for determining whether or not the communication area of the base station in the nearest area is available when the nearest area determining means determines that the nearest area is stored. The nearest area call availability determination means 16 for determining whether or not a call can be made by the free area information storage unit, and the nearest area call availability determination means, Notification information to search the notification information memory notification information indicating the position of the area search unit 16
And notification information transmitting means 16, 14, and 12 for transmitting the notification information searched by the notification information searching means to the portable terminal operated by the terminal.

[0008]

[0009] In mobile telephone system control apparatus that put the present invention, or a call channel of the base station of a mobile terminal is available
Callability confirmation that determines whether a call is possible or not
When the output signal output by the operation is transmitted via a predetermined base station, first, the callability determining unit determines whether or not the communication channel of the base station can be used. If the base station cannot be used, the nearest area determining means determines whether or not the nearest area is stored for the base station in the area storage unit. Then, when the nearest area is stored, the nearest area call availability determination means determines whether or not the communication channel of the base station in the nearest area can be used by the free channel information storage unit, and If the call is possible, notification information indicating the position of the nearest area is searched from the notification information storage unit, and the searched notification information is transmitted by the notification information transmitting unit. Therefore, the portable terminal holder can make and receive calls by moving while viewing the notification information indicating the position output by the portable terminal.

[0010]

[0011]

Embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, an exchange 10 as a mobile phone system control device of the present embodiment includes a line control unit (FIU) 12, a time switch (TSW) 14,
CPU 16, storage unit 18, optimal area search unit 24
And a public network interface 28.

The line control unit 12 is provided between the time switch 14 and the base stations 30-1 and 30-2, and serves as an interface between the base stations 30-1 and 30-2 and the exchange 10. The time switch 14 performs a conversion process based on the time division multiplex method via the public network interface 28 to control an analog line or a digital line. The switch 14 functions as a notification information transmitting unit. Further, the CPU 16 controls the operation of each section of the exchange 10 and serves as a callability determination unit, a callability determination unit, a nearest area callability determination unit, a nearest area callability determination unit, and a notification information search unit. Also works.

The storage unit 18 has a notification information storage unit 20 and a free channel information storage unit 22. The notification information storage unit 20 stores, as shown in FIG. A table is provided which stores numbers and display contents corresponding to the area numbers. Here, the display content is content that is specifically displayed on a display unit provided in the mobile terminal. The vacant channel information storage unit 22 has a table storing the area number of the wireless zone and the number of available communication channels in the base station in each area. That is, this table stores the number of idle communication channels at each base station at that time.

The optimum area searching section 24 functions as a nearest area determining means and has an optimum area storing section 26 as an area storing section as shown in FIG. As shown in FIG. 3, the area numbers of the wireless zones and the optimum area numbers in each area number are stored with priorities. For example, in the area number "1" shown in FIG. 3, the area number 2 has the first priority, and the area number 3 has the second priority. That is,
In the optimum area storage unit 26, areas to be moved to be notified to the mobile terminal when there is no available communication channel in each area are stored with priorities.

Next, the configuration of the base station 30 connected to the exchange 10 will be described. As shown in FIG. 4, the base station 30 includes a line interface unit 32, a highway control unit 34, a control signal modulation unit 36, a transmission unit 38,
Control signal demodulator 40, receiver 42, base station controller 4
4 and a synthesizer section 46. Here, the line interface unit 32 plays a role as an interface with the exchange 10 side.
The highway control unit 34 controls operations of the transmission unit 38 and the reception unit 42 that transmit and receive signals to and from the mobile terminal. The control signal modulator 36 modulates a transmission signal sent from the highway controller 34 to the transmitter 38,
On the other hand, the control signal demodulation unit 40 demodulates the reception signal received by the reception unit 42. The base station control unit 44 controls the operation of each unit in the base station 30 and includes an output signal generation unit 48. The output signal generation unit 48 generates a signal for outputting to a display unit or the like provided in the mobile terminal in the mobile terminal. Further, the synthesizer section 46 is for defining the transmission frequency of the transmission section 38 and the reception frequency of the reception section 42.

A portable telephone system having the above-configured exchange 10 and base station 30 will be described. As shown in FIG. 1, the exchange 10 includes a base station 30-1 and a base station 30.
-2, and the mobile terminals 50-1 and 50-2 are configured to wirelessly connect to the base stations 30-1 and 30-2. Here, the base stations 30-1 and 30-2 have the same configuration as the base station 30 (see FIG. 4).

The exchange 10 having the above configuration and the base station 30-1,
The operation of the mobile phone system having 30-2 and 30-3 will be described. Here, as shown in FIG. 5, the base station 30-1 is provided in a west laboratory, which has a wireless zone. Further, the base station 30-2 is provided in an office, and the office has a wireless zone. Further, the base station 30-3 is provided in the east laboratory, and has a wireless zone in the east laboratory. The wireless zone of the base station 30-1 is called area 1, the wireless zone of the base station 30-2 is called area 2, and the wireless zone of the base station 30-3 is called area 3.

Here, a case where a call is made from a portable terminal in the wireless zone of the base station according to the present embodiment will be described with reference to FIG. For example, the mobile terminal 50-
It is assumed that the calling operation starts from 1 and a link channel request from the mobile terminal 50-1 is made from the base station 30-1. Then, the exchange 10 receiving the link channel request determines whether or not a call can be made. That is, in the free channel information storage unit 22, it is determined whether or not there is a free channel in the communication channel of the base station 30-1 (step 1). If there is a vacancy in the call channel, normal call processing is performed (step 7).

On the other hand, if there is no free space, it is impossible to make a call, so it is determined whether or not there is a nearest callable area (step 2). That is, the optimum area search unit 24
Determines from the table of the optimum area storage unit 26 whether or not the optimum area is registered for the area 1 of the base station 30-1 that has received the link channel request. Here, when the table has the contents shown in FIG. 3, since area 2 and area 3 are registered as optimal areas,
Proceed to step 3 to search for the nearest area. Then, as for the area 1, the optimum area is first the area 2, so the area 2 is searched. If the nearest area is not registered in step 2 above, it is impossible to make a call from the portable terminal 50-1, so that the guidance is given or a busy tone is played to end the processing. (Step 6).

Next, when area 2 is searched as the nearest area, the CPU 16 determines whether or not a call can be made in this area 2 (step 4). That is, it is determined whether or not there is a free communication channel in the area 2 by looking at the free channel information storage unit 22 of the storage unit 18. If there is a free space and a call can be made, the process proceeds to step 4 to search for information in the notification information storage unit (step 5). That is, the display content corresponding to the area 2 is “4F” as shown in FIG.
Since it is “office room”, the information “4F office room” is searched. When the search is completed, the display content is transmitted to the portable terminal 50-1 (step 6).

More specifically, the information of the display content is stored in the base station 3.
In the base station 30-1, which has been sent to the base station 0-1 and receives it, the output signal generation unit 48 of the base station control unit 44 outputs the data at the portable terminal 50-1 based on the information obtained from the exchange 10. Is generated, and the output data is sent to the portable terminal 50-1. The portable terminal 50-1 has a receiving unit (not shown), and the portable terminal 50-1 that has received the output data by the receiving unit includes:
“4F office room” is displayed on the display unit as an output unit provided in the portable terminal 50-1. Then
The holder of the portable terminal 50-1 can know that calling is possible by going to the office on the fourth floor, so if the user moves to the office on the fourth floor and performs the calling operation again, the base station It is possible to avoid a call-disabled state due to the blocked communication channel 30-1. In other words, if you cannot make a call,
You can know where you can call.

If it is impossible in step 4 to make a call even in area 2, the process returns to step 3 again to search whether or not the nearest area is registered. In the case of the table shown in FIG. 3, since the area 3 is further registered, similarly, it is determined whether or not a call can be made in this area 3, and if possible, the notification information storage unit 20
Is retrieved and displayed on the portable terminal 50-1.

Although the determination as to whether or not a call can be made in step 1 has been described as being performed when a call is requested, the present invention is not limited to this case. In other words, when providing a service that provides information on whether or not a call can be made to the mobile terminal separately from the time of the call, an individual operation for the service in the mobile terminal is determined, and the operation is performed. It may be performed when there is.

Next, a case where a call is received by a portable terminal in the wireless zone of the base station having the configuration of this embodiment will be described with reference to FIG. For example, there is a call from outside to the portable terminal 50-1 in the area 1, and the portable terminal 50-1 is called.
Is registered in area 1 which is a wireless zone of base station 30-1. Then, in the exchange 10, it is determined whether or not a call can be received in the base station 30-1 (step 11). Here, when there is a vacancy in the communication channel of the base station 30-1 and an incoming call is possible, a normal incoming call process is performed (step 13).

On the other hand, when the communication channel of the base station 30-1 is blocked and the incoming call cannot be made, guidance to the calling side that the line connection is not possible or a busy tone is played. Notify that calling is not possible (step 1)
2). Thus, the calling side can know that the other party cannot call. Next, another operation when a call is received by the portable terminal will be described with reference to FIG. Specifically, there is a call from outside to the portable terminal 50-1 in the area 1, and the portable terminal 50-1 is connected to the base station 30-1.
It is assumed that the location is registered in the area 1 which is a wireless zone. Then, similarly to the above, in the exchange 10, it is determined whether the base station 30-1 can receive a call (step 21). Here, when there is a vacancy in the communication channel of the base station 30-1 and a call can be received, a normal call reception process is performed (step 29).

On the other hand, if there is no vacancy and it is impossible to receive a call, it is determined whether or not there is a nearest callable area (step 22). That is, the optimal area search unit 24
The portable terminal 50 is stored in the table of the optimal area
It is determined whether or not the optimum area is registered for the area 1 of the base station 30-1 whose location is registered as -1. Here, in the case of the table shown in FIG. 3, area 2 is searched (step 23). If the nearest area is not registered in step 22, the mobile terminal 5
Since it is impossible to receive a call at 0-1, guidance is given to the calling party or a busy tone is played to end the process (step 28).

Next, when the area 2 is searched as the nearest area, it is determined whether or not a call can be received in this area 2 (step 24).
If it is determined that there is an available communication channel in area 2 from area 2, information in the notification information storage unit is searched (step 25). When the search is completed, the display contents are transmitted to the portable terminal 50-1 (step 26). Specifically, as in the case of the call, the information of the display content is sent to the base station 30-1, and the base station 30-1 receives the information and outputs the output data to the portable terminal 50-1. Sent to In the portable terminal 50-1 receiving this, "4F office room" is displayed on the display unit. This allows the holder of the portable terminal 50-1 to know that a call can be made by going to the office on the fourth floor, so that the user can move to the office on the fourth floor and receive a call from the other party. Yes, base station 30-
It is possible to avoid a state in which a call cannot be received due to the blocking of one communication channel. That is, the called side can also know the position where the call can be made.

At the same time as the above display is made on the called side,
The calling side is also instructed to wait for a while to change the called position by giving guidance such as "Please wait until the other party changes the called position" (step 27).
If it is determined in step 24 that the incoming call cannot be made in the area 2, the process returns to step 23 to search for the nearest area, determine whether the incoming call is possible, and the like.

In the case of the above-mentioned incoming call, the determination as to whether or not the incoming call can be made in step 11 and step 21 is made not only at the time of calling, but also separately as to whether or not the incoming call can be made. May be performed when there is an individual operation in the service provided to the user. That is, when performing the above service, an individual operation for the service request in the mobile terminal may be determined, and the operation may be performed when the operation is performed.

Next, the exchange 10 having the above configuration and the base station 30
Another operation example of the mobile phone system having -1, 30-2, and 30-3 will be described with reference to FIG. That is, in the above example, when the mobile terminal performs a call operation or a service request operation, the mobile terminal notifies the nearest area to the mobile terminal, but in this operation example, the mobile terminal is located within the area of the wireless zone of the base station. This is done for all mobile terminals.

For example, when the portable terminal 50-1 is connected to the base station 30-
Consider a case in which the user enters one wireless zone. Here, the exchange 10 periodically determines whether or not the outgoing / incoming call can be made in the base station 30-1 by the free channel information storage unit 22 (step 31), and the outgoing / incoming call cannot be made because the communication channel is blocked. In this case, the optimum area search unit 24 searches whether there is a nearest area (step 32). If there is a nearest area, it is determined whether or not the communication channel of the base station in that area is free (step 34). That is, in the above case, since the optimum area in area 1 is area 2 according to the table in FIG. 3, it is determined whether or not the communication channel of base station 30-2 in area 2 is free.

If there is a vacancy in the communication channel and the outgoing / incoming call can be made, the display contents are searched for in the notification information storage unit 20 (step 35), and the contents are transmitted to the portable terminal 50-1. (Step 36). In other words, when an outgoing / incoming call in the area 2 is possible, the portable terminal is provided with the “4F office” as in the case of the operation example shown in FIGS.
Will be displayed.

If it is determined in step 31 that a call can be made, the process is terminated, and after a predetermined time, it is determined whether the call can be made again. If there is no registration of the nearest area in step 32, it is determined that all areas are unusable, and guidance is given to the portable terminal 50-1 that calling and arriving and calling cannot be performed (steps 37 and 38). The exchange 10 performs the above processing for the base station 30-1, but performs the same processing for the other base stations.

In this way, it is possible to know whether or not a call can be made and received at the current position without a call operation, and to determine where to go and make a call. Since it is possible to know, it is possible to secure an opportunity for outgoing and incoming calls. Although the determination as to whether or not a call can be made in step 31 has been described as being performed at predetermined time intervals, the empty channel information storage unit 2 in the storage unit 18 has been described.
Alternatively, the process of step 32 may be started by constantly monitoring the information of No. 2 and determining whether there is a nearest area for the base station in the area where the communication channel is no longer available. In addition, the location registration information of the mobile terminal is transmitted to the exchange 10.
May be held, and the nearest area may be notified from the base station to the portable terminal newly registered with any of the base stations.

Furthermore, in the above description, the exchange 10 has been described as performing the processing of steps 31 to 38, but the base station 30-1 may perform the processing. That is, since each base station also holds information as to whether or not its own communication channel is free, the optimum area storage unit storing the nearest area for the base station and the optimum area storage unit storing the information are stored in the optimum area storage unit. If the base station is provided with a vacant channel information storage unit that stores the vacant state of the communication channel in the nearest area and a notification information storage unit that stores the display contents of the nearest area, the processing can be performed in the base station. It can be carried out. That is, the base station 30 in charge of the area 1
As an example, information of only the area 1 in the table of FIG. 3 is stored in the optimal area storage unit, and information of only the area 2 and the area 3 in the table of FIG. 2 is notified. It is only necessary to store the communication channel in the free channel information storage unit and hold the free state of the own communication channel in the free channel information storage unit.

Further, the base station has an empty channel information storage unit for holding an empty state of its own communication channel, and when the communication channel is blocked, information for indicating that calling / incoming / outgoing calls are not possible is provided. The signal is generated by the output signal generator 48 (see FIG. 4), transmitted to the portable terminal in the wireless zone of the own station, and the portable terminal side informs that the call cannot be made and received, and the portable terminal owner May be moved.

In each of the above examples, it has been described that the nearest area is notified when all of the communication channels of the base station are in use. However, when the number of used channels exceeds a certain ratio, the nearest area is notified. You may make it notify. In addition, the method of output in the portable terminal 50-1 may be display on the display unit or output by sound from a speaker.

Note that notifying the portable terminal of the nearest area as described above is particularly effective in the PHS. That is, since the base station used for the PHS has a small wireless zone, the area can be easily moved even if the nearest area is notified. Next, a second embodiment will be described. Exchange 110 in Second Embodiment
Is a line control unit (FIU) 112 as shown in FIG.
, A time switch (TSW) 114 and a CPU 116
, A storage unit 118, and a public network interface 128.

Here, the line control unit 112, the time switch 114, and the public network interface 128 have the same configuration as the line control unit 12, the time switch 114, and the public network interface in the first embodiment, respectively. The CPU 116 controls the operation of each unit in the exchange 110, and has functions of a receiving voltage calculating unit, a current position specifying unit, and a public telephone searching unit. Further, the line control unit 112 and the time switch 1
14 and the CPU 116 function as position information transmitting means.

The storage unit 118 has a channel information storage unit 120, a voltage distribution information storage unit 122, a position information storage unit 124, and an empty channel information storage unit 126. , As shown in FIG. 11, stores information on assigned channels in each base station. The voltage distribution information storage unit 122 includes
As shown in FIG. 12, received voltage distribution information around the base station is stored for each base station. Further, the location information storage unit 124 stores location information of a public telephone provided around a base station connected to the exchange 10. In the same manner as in the first embodiment, the free channel information storage unit 126 has a table storing the area numbers of the wireless zones and the number of available communication channels in the base station in each area. are doing. That is, this table stores the number of available channels at each base station at that time.

The configuration of the portable telephone system including the exchange 110 will be described. The exchange 110 is connected to the base station 130-1 or the like via the line control unit 112, and the portable terminal 150-1 or the like is connected to the base station. It is configured to wirelessly connect via 130-1 or the like. The base station 130-1 and the like have the same configuration as the base station 30 shown in FIG. 4, and the portable terminal 150-1 and the like measure transmission waves (combined waves) from a plurality of base stations. , The received voltage (voltage spectrum) of each channel of the synthesized wave (see FIG. 13)
Is derived from a voltage spectrum deriving unit (not shown).

The exchange 110 and the base station 130-
1 and the operation of the mobile phone system having the mobile terminal 150-1 and the like will be described. Here, a case where a call is made from a portable terminal in the wireless zone of the base station according to the present embodiment will be described. For example, it is assumed that a call operation is performed from the mobile terminal 150-1, and that a link channel request is made from the base station 130-1 from the mobile terminal 150-1. Here, it is assumed that the portable terminal 150-1 always derives the reception voltage (voltage spectrum) for each channel by the voltage spectrum deriving unit. Then, the exchange 110 that has received the link channel request determines whether or not a call can be made. That is, the vacant channel information storage unit 126
In, it is determined whether there is a vacancy in the communication channel of the base station 130-1. If there is a vacancy in the communication channel, normal call processing is performed. If there is no vacancy in the communication channel, the voltage spectrum is transmitted to the portable terminal 150-1 via the base station 130-1. Is transmitted, and a voltage spectrum is acquired from the portable terminal 150-1.

The exchange 10 obtains reception voltages from the respective base stations from the voltage spectrum obtained from the portable terminal 150-1 and the channel information stored in the channel information storage unit 120, and takes into account the measurement error. A table as shown in FIG. 14 is created. Next, the current position of the portable terminal that has made the call request is specified from the received voltage from each base station obtained above and the voltage distribution information stored in the voltage distribution information storage unit 122. That is, assuming that the base station 130-1 is the base station A and the base station 130-2 is the base station B, and the reception voltages from the respective base stations are as shown in FIG. It can be seen that this is a portion surrounded by oblique lines shown in FIG.

When the position of the portable terminal 150-1 has been specified, the portable terminal 150-1 is stored in the position information storage unit 124.
Is specified, and the position information of the public telephone is transmitted to the portable terminal 150-1. Here, as a method of representing the position of the public telephone, there are a method of displaying the address of the public telephone, a method of displaying the direction and the distance of the public telephone, and the like. When there are a plurality of public telephones entering the diagonal lines in FIG. 15, the position information of all the public telephones is transmitted.

As described above, a person who has made a call operation on portable terminal 150-1 can know the position of the nearest public telephone located closest to the terminal, so that the communication channel of the base station is blocked. It is possible to make a call from a public telephone with less travel distance. Note that the exchange 110 holds map information indicating the positions of public telephones arranged around each base station, and stores the map information of the portion corresponding to the position of the specified portable terminal in the map information. You may make it transmit to a portable terminal including position information. Further, in the above example, when a call is made from the mobile terminal, it has been described that the location information of the nearby public telephone is transmitted by checking the free state of the communication channel of the base station. However, for example, in the case of performing a service of providing information on whether or not a call can be made to the mobile terminal separately from the time of the call as in the first embodiment, the service for the service in the mobile terminal is required. An individual operation may be determined, and the position of the public telephone may be notified when the operation is performed. In addition, the base station monitors the base station in which the communication channel is blocked, and receives the received voltage information from each mobile terminal for all the mobile terminals within the wireless zone of the base station. The position of the nearest public telephone may be notified.

In the above embodiment, the exchange 110 is described as having the storage unit 118 and providing information on the location of the nearest public telephone. However, the present invention is not limited to this. As a configuration having 118, the base station may determine the position of the nearest public telephone and provide the information. A method of detecting the reception sensitivity of signals from a plurality of base stations on the mobile terminal side, transmitting the detected data to the center, and determining the position of the mobile terminal at the center is disclosed in Japanese Patent Laid-Open No. 2-44929. It has been disclosed.

In the above example, the position of the nearest public telephone is notified when all the communication channels of the base station are in use. However, when the use channel exceeds a certain ratio, The nearest area may be notified. In addition, as an output method in the portable terminal 150-1, a display on a display unit or an output by a sound from a speaker may be used.

[0048]

According to the portable telephone system control device of the present invention, the portable terminal is output by the portable terminal holder who has performed a terminal operation such as a line connection request operation or an individual callability confirmation operation. Calls can be made and received by moving while looking at the displayed contents.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an exchange and a mobile phone system including the exchange in a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of a table provided in a notification information storage unit.

FIG. 3 is an explanatory diagram illustrating a configuration of a table provided in an optimum area storage unit.

FIG. 4 is a block diagram illustrating a configuration of a base station according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a specific use state of the first embodiment.

FIG. 6 is a flowchart showing an operation example at the time of calling in the first embodiment.

FIG. 7 is a flowchart illustrating an operation example when a call is received in the first embodiment.

FIG. 8 is a flowchart showing another operation example at the time of receiving a call in the first embodiment.

FIG. 9 is a flowchart showing another operation example in the first embodiment.

FIG. 10 is a block diagram showing a configuration of an exchange and a mobile phone system including the exchange according to a second embodiment of the present invention.

FIG. 11 is an explanatory diagram showing a configuration of a table provided in a channel information storage unit.

FIG. 12 is an explanatory diagram showing contents of a voltage distribution stored in a voltage distribution information storage unit.

FIG. 13 is an explanatory diagram showing a specific example of a reception voltage for each channel.

FIG. 14 is an explanatory diagram showing a configuration of a table storing information on received voltage for each base station.

FIG. 15 is an explanatory diagram for describing a method of specifying the position of the mobile terminal.

[Explanation of symbols]

10, 110 exchange 16, 116 CPU 18, 118 storage unit 20 notification information storage unit 22 free channel information storage unit 24 optimal area search unit 26 optimal area storage unit 30, 30-1, 30-2, 30-3, 130 -1, 1
30-2, 130-3 base station 120 channel information storage unit 122 voltage distribution information storage unit 124 position information storage unit 126 free channel information storage unit

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ Identification code FI H04Q 7/26 7/30 (72) Inventor Kaihei Kueda 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Masahide Watanabe 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-7-46319 (JP, A) (58) Fields investigated (Int. H04B ^7/ 24-7/26 113 H04Q ^7/ 00-7/38

Claims (1)

(57) [Claims] 1. A mobile phone system control device connected to a plurality of base stations wirelessly connected to a mobile terminal, the mobile phone system control device comprising: information on whether or not a communication channel of each base station in the plurality of base stations is available. An empty channel information storage unit (22) for storing, an area storage unit (26) for storing a plurality of areas closest to the area of each base station, and a notification for storing notification information indicating the position of the area of each base station. Information storage unit (20), and the communication channel of the calling side base station in the portable terminal is
It is determined whether or not a call can be made based on whether or not it is available.
When the output signal output by the callability confirmation operation is transmitted through a predetermined base station, the vacant channel information storage unit determines whether or not the communication channel of the base station is usable. A call permission / inhibition determining means (16); and a nearest area for determining whether or not the nearest area of the base station is stored in the area storage unit when a call cannot be made by the call permission / inhibition determination means. Determining means (24), and when the nearest area determining means determines that the nearest area is stored, determines whether or not the communication channel of the base station in the nearest area is available; The nearest area call permission / inhibition determination means (16), and the position of the nearest area when the nearest area call permission / inhibition determination means determines that a call is possible. A notification information search means (16) for searching the notification information indicated by the notification information storage unit; and a notification information for transmitting the notification information searched by the notification information search means to the portable terminal operated by the terminal. A mobile phone system control device comprising: information transmission means (16, 14, 12).