JP3378463B2 - 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 specifically, to a recording medium having a base station device and a base station control program recorded therein. This is suitable when the line between the base station and the control station is disconnected due to the influence of a disaster or the like.

[0002]

2. Description of the Related Art The basic system of a digital mobile communication system for public service is composed of a base station and a mobile station, and comprises a control station for controlling a plurality of base stations and a command station for controlling a plurality of the control stations. There is.

The base station is connected to the control station only,
Base stations are not directly connected to each other. This base station performs signal processing of radio signals, and the signals are sent to the control station or mobile station as they are. The control station has a line switching function and is connected to a plurality of base stations and control stations in radio zones of other base stations. The command center controls and monitors each control station, and does not have a function such as line switching.

2 to 4 are schematic configuration diagrams of a basic system of a conventional public mobile digital mobile communication system.
The signal path will be described with reference to these drawings. In particular,
FIG. 2 is a diagram showing a signal path when a terminating mobile station exists in the same base station zone as the originating mobile station. Originating mobile station 1
The signal sent from the device is sent to the control station 30 via the base station 10 with the ID (identification) number of the called party, and the destination mobile station exists based on the position registration information that can be read there. It is switched to the base station that operates.

Therefore, depending on the base station zone in which the terminating mobile station exists, it may be switched to the same base station zone as the originating mobile station 1. In the case of FIG. 2, since the mobile station which requests the call from the originating mobile station 1 is the mobile station 3,
It indicates that they will be in the same base station 10 zone.

FIG. 3 is a diagram showing a signal path when the originating mobile station and the terminating mobile station are in the same control zone but in different base station zones. In FIG. 3, a call request sent from the mobile station 2 to the mobile station 21 is given to the control station 30 through the base station 10.
The call request is transferred to the base station 20 in which Base station 20
Can send a call request to the mobile station 21, and the mobile station 21 can receive the call.

Further, FIG. 4 is a diagram showing a signal path when the control zone of the originating mobile station is different from that of the terminating mobile station, or when the terminal is connected to the terminal connected to the private switching network.
In FIG. 4, in response to a call from the mobile station 22 to a base station in another control zone or a terminal of a private exchange network connected to the control station 30, the control station 30 is directed through the base station 20 in the direction of the arrow in the figure. The control station 30 can transfer the call signal from the base station of the other control zone or the exchange 31 to the terminal connected to the private exchange network in the direction of the arrow in the figure to receive the call.

In addition, in the above-mentioned FIGS. 2 to 4, the transfer can be performed by the transfer route in the direction opposite to the arrow in the figure, and the control station 30 can perform the switching process based on the position registration information to connect to each mobile station. You can do it.

Next, the location registration of the mobile station will be described. The position registration is performed when the mobile station is powered on, when moving from another base station, or when moving to another base station. As for the location registration information, the location registration information of all mobile stations is centrally managed at one place, and the control station performs switching processing based on the location registration information. If the location registration information of the terminating mobile station does not exist, the information indicating that the location is not registered is notified to the calling side, and the line connection is not established. That is,
Mobile stations that are not registered are considered not to be in any base station zone. If there is location registration information, the control station switches the line to the incoming mobile station to establish the line connection.

[0010]

The digital mobile communication system for public works as described above is a wireless communication system that must exert its power particularly in the event of a disaster such as an earthquake. When the line between the station and the control station or the line between the control station and the command center is disconnected, it may take a considerable time to restore the line connection.

For example, when the line between the control station 30 and the command station is disconnected, the command station itself mainly monitors the control station 30, so that communication does not become a particularly serious problem. However, as shown in FIG. 5, the line 40 (for example, a wired line or a wireless line) between the base station 10 and the control station 30 is disconnected (for example, a disconnection due to a physical breakage of a wired transmission cable, an electrical connection of a line communication device). When disconnected due to communication failure due to physical failure), signals from mobile stations 1 to 3 in the zone of the control station 30 and the disconnected base station 10 cannot be switched, and position registration information is obtained. Therefore, even if the incoming mobile station is in front of the same base station zone, the line connection cannot be established, and all mobile stations 1 to 3 in the base station 10 zone cannot communicate. , Restoration of line connection I had no choice but to wait.

From the above, even if the line between the base station and the control station is disconnected, the influence of the disconnection can be reduced, and the communication between the mobile station and the other can be secured to some extent. There is a demand for realization of a high mobile communication system, a base station device, and a recording medium recording a base station control program.

[0013]

Therefore, the present invention is directed to the first aspect of the present invention.
The first call managing unit controls the position of the mobile station device via the nearest first base station device based on the call origination signal transmitted by the mobile station device.
To the second mobile station device existing in the radio zone of the other second base station device under the control of the first control station device, or received the transfer. Between the first mobile station device and the second mobile station device or terminal device by making an incoming call from the first control station device to the second mobile station device or terminal device under the control of the other second control station device. In a mobile communication system that performs communication according to, the above-mentioned problems are solved by the following characteristic configurations.

That is, according to the present invention, the first base station device (1) receives a signal wirelessly transmitted from the first mobile station device, and performs position registration by the received signal, 2) When the calling signal from the third mobile station device is received, it is confirmed what the called party of the calling signal is, and whether the called party is registered in the position registration means or not. And if registered, the return switching transmission means for wirelessly transmitting the received call signal to the base station radio zone.

By adopting such a configuration, even if the line connection between the first base station apparatus and the first control station apparatus is disconnected, it is registered in the location registration means as within the own base station zone. When a call signal to the existing mobile station device is received, the call is received from the first base station device by transmitting it to the own base station zone without transferring the received call signal to the first control station device. It becomes possible to make a call to the mobile station device of the other party to make a call.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the present invention will be described with reference to the drawings. In this embodiment, the device in the base station,
A position registration circuit that registers the position of the mobile station in the own base station zone, and when the call signal is sent from the mobile station in the own base station zone to the base station, the destination mobile station When it exists in the zone, a switching circuit that performs switching control and transmits to the mobile station in the own base station zone without relaying the calling signal that is judged and received in the base station to the control station.

In the present embodiment, various concrete examples will be described below while adopting such a basic structure.

First Embodiment: FIG. 1 is a schematic configuration diagram of a mobile communication system according to the first embodiment. In FIG. 1, the present mobile communication system is characteristically different from the above-described conventional mobile communication system in that the base stations 10A and 20A are different.
In addition, the switching circuits 65 and 66 and the position registration circuit 69 are provided.

That is, for example, the base station 10A receives the position registration signals from the mobile stations 1 to 3 and registers in the position registration circuit 69 that it exists in the zone of the base station 10A.
Along with this registration, the base station 10A transfers it to the control station 30 through the line 40 in the same manner as in the conventional case, and the control station side also registers the location of the mobile stations 1 to 3 existing in the base station 10A zone. Then, when the mobile station 21 of the base station 20A enters the zone of the base station 10A, it registers in the position registration circuit 69 of the base station 10A. When the mobile station 1 goes out of the zone of the base station 10A to another base station zone, the registration is deleted from the position registration circuit 69 of the base station 10A.

Operation when the line connection is normal: When the line 40 between the base station 10A and the control station 30 is normally connected, for example, a call signal from the mobile station 1 to the terminating mobile station 2 is transmitted. If the line connection is normal, the line is transferred to the control station 30 through the line 40 without switching at the base station 10A, and the location registration information 70 of the destination mobile station 2 is confirmed here. If it is confirmed that the location registration of the mobile station 2 is registered in the zone of the base station 10A, the control station 30 determines that the line 40
The call signal can be transferred to the base station 10A through the base station 10A, and the call signal can be transmitted from the base station 10A and received by the mobile station 2. Therefore, if line 40 is normal,
The location registration is performed only by the base station 10A, and other call signal transfer methods are the same.

When the line connection of the line 40 is normal, the operation of the switching circuits 65 and 66 provided in the base station 10A is stopped, and the base station 10A freely calls the control station 30. Allow the signal to be transferred. As a result, the operation frequency of the switching circuits 65 and 66 is reduced, and the frequency of failures is reduced. The location registration operation in the base station 10A is always performed regardless of whether the line connection is abnormal or normal. This is when the line connection is broken,
This is so that it can be dealt with immediately.

Further, the position registration circuit 69 in the base station 10A
While the line connection of the line 40 is normal, the location registration information of is notified to the control station 30 periodically from the control station 30 according to, for example, a polling cycle.

Operation when line connection is abnormal: Next, line
The line connection at 40 became abnormal and the base station 10A and control station
The operation of the system when communication with 30 becomes impossible will be described below.

FIG. 6 is a diagram for explaining the operation when the line connection between the base station 10A and the control station 30 is disconnected in the mobile communication system of the first embodiment.
In FIG. 6, when the mobile station 1 transmits a call signal to the mobile station 2 and the base station 10A receives the call signal and tries to transfer it to the control station 30, the line 40 is abnormal and disconnection is detected. Sometimes, the location registration circuit 69 in the base station 10A confirms whether or not the mobile station 2 of the called party is registered, and when it is confirmed that the mobile station 2 in the own base station 10A exists, the switching circuits 65 and 66 are operated. Then, the transfer of the received call signal from the mobile station 1 to the control station 30 is stopped, and conversely, the base station 10A
Is transmitted from the mobile station 2 to the mobile station 2 in its own base station zone, and the mobile station 2 receives the call.

With such a configuration, even if the line 40 is abnormal and the line connection is disconnected, it is impossible to receive an incoming call to the mobile station 2 in the prior art, but in the case of this embodiment, the own base station zone is used. Since the destination mobile station 2 exists inside, the transfer can be automatically switched to receive the incoming call.

Further, when the line connection of the line 40 is disconnected, the control station 30 controls the positions of the mobile stations 1 to 3 registered in the base station 10A whose line connection is disconnected in the position registration information 70. It is necessary to delete the registration information. This is because if the location registration information registered in the base station 10A whose line connection has been disconnected is left, for example, when a call is made from another base station 20A to the mobile station 1 of the base station 10A. To
The control station 30 sends the call request signal from the base station 20A to the base station 10A.
Will be sent to. As a result, since the line connection is cut off, the response is not returned to the control station 30, and the control station 30 has to wait for a long time, which causes the mobile station that has issued the call request to wait, promptly. I can't give an accurate response. For this reason, the base station 10
By deleting the location information of the mobile station registered in A from the location registration information of the control station 30, the control station 30 can send a call request signal to the base station 10A whose line connection is disconnected. Therefore, it becomes possible to promptly return a signal indicating that the line connection is impossible to the mobile station that has issued the call request.

When the line connection of the line 40 is restored, the latest position registration information managed by the position registration circuit 69 in the base station 10A is periodically sent to the control station via the line 40.
Control station 30 according to, for example, a polling cycle from 30
It is preferable to notify.

By adopting the configuration shown in FIGS. 1 and 6 above, even if the line between the control station 30 and the base station 10A is disconnected due to the influence of an earthquake or the like, movement within the same base station zone Since it is possible to secure communication between stations, it becomes possible to exert its power in securing communication in an emergency such as an earthquake. Particularly in public mobile communications for disasters and rescues, for example, a certain mobile station may be the leader to give instructions to other mobile stations, and the line from the command station or the control station side is disconnected. Even if it becomes, there is a great effect that rescue operations can be performed by communication between mobile stations.

In addition, the line 40 from the base station 10A to the control station 30
Even when the mobile station is disconnected, the mobile station that has been powered on can perform position registration as usual in the base station zone where the circuit is disconnected.

Detailed configuration of the base stations 10A and 20A: FIG.
FIG. 7 is a detailed structural diagram of an example of the base stations 10A and 20A used in FIGS. 1 and 6 described above. In FIG. 7, the base station 10A
, 20A mainly communicates with the mobile station, and communicates with the control station, with the base station main unit 60 that transmits and receives signals with the base station transmission device 50 to exchange signals with the control station. It is composed of a base station main device 60 and a base station transmission device 50 for exchanging signals. The base station transmission device 50 includes a line connection disconnection detection circuit 51 for detecting line connection disconnection, and outputs a line connection disconnection detection signal to the switching control circuit 67 of the base station main device 60 when the line connection disconnection is detected. .

The base station main unit 60 receives a reception antenna 64 for capturing a radio signal from a mobile station and a signal captured by the reception antenna 64, detects a calling signal, a position registration signal, etc., and switches the circuit 66. The position registration signal to the control circuit.
The receiving circuit 62 given to 68 and the position registration signal from the receiving circuit 62 are given to the position registration circuit 69, it is judged whether or not the mobile station exists in the own base station zone, and the judgment result signal is switched to the control circuit 67. It is provided with a control circuit 68 for giving, and a position registration circuit 69 for registering and managing the mobile station in the own base station zone based on the position registration signal given from the control circuit 68.

Further, the base station main unit 60 gives the judgment result signal obtained by the judgment by the control circuit 68 to the switching circuits 66 and 65 to detect the disconnection of the line when the line disconnection detection signal is detected. When not detected, a switching control circuit 67 that performs non-switching control on the switching circuit, and a call signal and a location registration signal from the receiving circuit 62 to the base station transmission device 50 by a control signal from the switching control circuit 67. Switching circuit 66 that gives or folds and gives to switching circuit 65
It has and.

Further, the base station main unit 60 gives a signal from the base station transmitter 50 to the transmitting circuit 61 according to a control signal from the switching control circuit 67, and a loopback signal given from the switching circuit 66 to the transmitting circuit 61. Switching circuit to give
65, a transmission circuit 61 for giving the signal from the switching circuit 65 to the transmission antenna 63, and a transmission antenna 63 for radiating the signal from the transmission circuit 61.

The control circuit 68, the position registration circuit 69, and the switching control circuit 67 can be realized by a microcomputer circuit in terms of hardware. Then, this microcomputer circuit can be realized by mounting a base station control program capable of performing processing such as position registration, confirmation of registered position, and switching control. This base station control program may be installed in a memory circuit or a magnetic disk device.

Next, the operation of the base station shown in FIG. 7 will be described. First, when the position registration signal from the mobile station is received by the receiving antenna 64 and the receiving circuit 62, the receiving circuit 62 gives this position registration signal to the control circuit 68, and from this control circuit 68, the position registration circuit.
Register with 69.

On the other hand, the line disconnection detection circuit 51 of the base station transmission device 50 monitors the line characteristics and communication protocol characteristics of the line to determine whether or not the line is disconnected. The line disconnection detection signal is not output, so that the switching control circuit 67 does not allow the determination result signal from the control circuit 68 to be given to the switching circuits 65 and 66. As a result, the switching circuits 65 and 66 fixedly connect the reception circuit 62 and the base station transmission device 50, and further fixedly connect the base station transmission device 50 and the transmission circuit 63. If the line connection is normal, make a fixed connection like this.

With such a line connection being normal, a call signal is transmitted from the mobile station, the receiving antenna 64, the receiving circuit
When received at 62, this calling signal is given to the base station transmitter 50 through the switching circuit 66. This base station transmission device 50 outputs the given calling signal to the line in order to give it to the control station.

A call signal from another base station given from the control station is received by the base station transmission device 50, is output to the switching circuit 65 from here, and is further transmitted from here to the transmission circuit 61.
Given to. The transmission circuit 61 causes the transmission antenna 63 to radiate and output the calling signal from the control station.

In this way, when the line connection is normal, while registering the position of the mobile station in the position registration circuit 69,
The calling signal received from the mobile station is transmitted to the control station as in the conventional case, and the control station side performs the line switching process to the destination.

Next, when the line connection disconnection detection circuit 51 of the base station transmission device 50 detects the line connection disconnection, a line connection disconnection detection signal is output and given to the switching control circuit 67. As a result, the switching control circuit 67 starts the control operation, and sends the determination result signal from the control circuit 68 to the switching circuit 65,
You will be given control over 66.

That is, when the line connection is disconnected, the line switching for controlling the incoming call to the call signal from the mobile station is performed by the position registration information registered in the position registration circuit 69 and the switching circuit 65. , 66 switching operation,
By this, the return transmission is performed to the mobile station in the own base station zone.

That is, when the receiving antenna 64 and the receiving circuit 62 receive the calling signal from the mobile station, the control circuit 68 informs the position registering circuit 69 of the position information of the mobile station to which the calling signal is received in its own base station. It is confirmed whether or not the mobile station is registered as a mobile station in the zone, and if it is registered, the control circuit 68 is used to cause the destination mobile station in the own base station zone to send back.
Gives a determination result signal to the switching control circuit 67 to perform switching control for folding back. The switching control circuit 67 controls switching of the switching circuits 65 and 66 based on this determination result signal, and the switching circuit 66 is a receiving circuit.
The calling signal from 62 is given to the switching circuit 65, and from here, it is given to the transmission circuit 61. This transmission circuit 61 causes the transmission antenna 63 to radiate and output a return call signal.

As a result, even if the line to the control station is disconnected, if the destination mobile station is in the same base station zone as the calling mobile station, the incoming call is not affected by the line disconnection. It is possible to realize a very effective system that allows the other party to receive an incoming call.

When the line connection is cut off,
When the mobile station of the called party for the calling signal received by the receiving circuit 62 is not registered in the position registration circuit 69, the determination result signal indicating non-registration is switched from the control circuit 68 to the switching control circuit 67. Giving and switching circuit 65, 66 from here
Switching circuit 6 without switching back
The contacts 5 and 66 are connected to the base station transmitter 50. Here, it is also preferable that the transmission circuit 61 is configured to transmit a signal indicating that the line is disconnected to the mobile station that has transmitted the call request.

Further, since the operation load on the base station can be reduced and the failure occurrence rate of the base station in operation can be lowered, maintenance of the base station (for example, up to the top of the mountain) is required due to the occurrence of the base station failure. It is possible to reduce the time and effort that a man goes to. Since the failure occurrence rate of the base station is reduced, the line drive time can be improved. Even if the line switching function of the base station fails, the function is not used during normal operation, so that communication can be performed without problems in operation. Even if a failure occurs in the line switching function of the control station, the control station is manned, so that quick troubleshooting can be performed.

Second Embodiment: In the mobile communication system of the first embodiment described above, when the call signal is received by the receiving circuit 62 from the mobile station when the line connection is normal, the received call signal is The switching circuits 65 and 66 are fixedly provided to the base station transmission device 50, and transmitted from there to the control station to confirm the location registration at the control station. When the line is disconnected, the location registration is confirmed by the location registration circuit in the base station main unit. However, in the second embodiment, the base station main unit 60 confirms the location registration even if the line connection is normal or the line connection is disconnected.
The position registration circuit 69 in A is used for confirmation to determine the loopback switching control. By doing this, it is possible to avoid the problem that the call is cut off when the line connection is cut off midway while the mobile station is talking to the mobile station in its own base station zone through the line. be able to.

FIG. 8 is a functional block diagram of the base station 10B used in the mobile communication system of the second embodiment. This Figure 8
In the above, what is characteristically different from the configuration of FIG.
That is, the switching control circuit 67 is not controlled by the line disconnection detection signal detected by the line disconnection detection circuit 51.

Then, the switching circuits 65 and 66 are always controlled by the judgment result signal from the control circuit 68. As a result, the calling signal from the mobile station is received by the receiving circuit.
When the mobile station of the destination of this calling signal is registered in the position registration circuit 69 when received at 62, the control circuit 68
Applies the determination result signal for the loopback switching control to the switching circuits 65 and 66 to switch it, and operates so that the calling signal of the receiving circuit 62 is supplied to the transmitting circuit 61. Then, the transmission circuit 61 causes the transmission antenna 63 to radiate and output the calling signal.

The calling signal from the mobile station is received by the receiving circuit 62.
When the mobile station of the destination of this calling signal is not registered in the position registration circuit 69 when received by the control circuit 69 for transferring to another base station zone, the switching circuit 65,
It controls 66 and gives a calling signal to the base station transmitter 50. This base station transmission device 50 outputs a calling signal to the line and gives it to the control station.

In this way, the base station main unit 60A performs loopback switching control if the destination mobile station is within its own base station zone, regardless of whether the line connection is cut or normal, and the own base station. If it is not in the zone, give it to the base station transmission device 50,
If the line connection is normal, output to the line. Therefore, when mobile stations in the own base station zone are talking to each other,
Even if the line connection is cut off, the problem that the call is cut off can be avoided.

Third Embodiment: In the above-mentioned embodiments, the base station plays a role of relaying a call between mobile stations, but the base station is willing to proactively if necessary at its own initiative. The mobile station is provided with a communication function so that it can make a call. This is to allow the base station to perform a center function.

For example, the above-mentioned conventional base station processes signals from mobile stations and control stations and transmits the signals as they are, or enables communication between mobile stations within the own base station zone. However, it does not have the facility to directly call the mobile station from the base station. In order to make a call request to the mobile station, as shown in FIG. 9, the call enters the exchange 31 installed in the control station 30 through a line to the control station 30, and from there the call to the target mobile station is made. We have adopted the method of getting people to call. However, in such a system, a problem occurs when a line disconnection occurs between the control station 30 and the base station due to an earthquake or the like. First, if the line between the control station 30 and the base station is the same as that of the wireless line, as shown at 41 in FIG. 10, when the line connection is cut off, the call request from the base station is made. The signal is not sent to the exchange 31 of the control station 30 and the line is not established. Further, even if the calling line from the base station 10 is provided separately as shown by 42 in FIG. 10, the control station 30 and the base station
The line connection cannot be established anyway because the line with 10C is disconnected.

Therefore, in addition to the switching function of the base station (which enables independent return (communication between mobile stations) within the own base station zone), a change from the base station to a mobile station existing within the own base station zone is performed. It is equipped with a communication function that allows it to make a call. As a result, even if the line between the control station and the base station is disconnected due to an earthquake or other disaster, it will be possible to directly call the mobile stations existing in the base station zone from that line. To be able to handle emergency communication.

Therefore, FIG. 11 is a diagram showing an example in which a line is desired to be connected from the base station 10C to the mobile station 3 in the mobile communication system according to the third embodiment of the present invention. This Figure 11
In the above, characteristically, the base station device 10C includes a communication circuit 82. The communication circuit 82 is, for example, a telephone device or the like.

This communication circuit 82 makes it possible to originate a call to, for example, the mobile station 3 in the own base station zone. This allows the base station 10C and the control station 30
Even if the line 40 between and is disconnected, the base station 10C can actively make a call to the mobile station in its own base station zone to receive the call. Of course, if the line 40 is normal, the communication circuit 82 makes a call to another base station or a mobile station in another control zone or a terminal of the automatic switching network via the control station 30 through the line 40 to make an incoming call. It is also possible.

FIG. 12 is a functional block diagram of a concrete example of the base station 10c in FIG. 12 is different from FIG. 8 described above in that the base station main device 60B is provided with communication circuits (TR) 82 and 85, and these communication circuits are also provided.
The configuration is such that the switching circuits 81, 83, 84 and 86 can be used to switch between 82 and 85 as needed.
The communication circuits 82 and 85 can use telephone devices, for example.

For example, the communication circuit 82 is used when communicating with a mobile station existing in its own base station zone. That is, by switching the contacts of the switching circuit 81, the transmission circuit 61 and the communication circuit 82 are connected, and further, the switching circuit
By connecting the receiving circuit 62 and the communication circuit 82 by switching the contact of 83, the communication circuit 82 can call the mobile station existing in the own base station zone and talk with the mobile station. become. By connecting the base station transmission device 50 and the communication circuit 85 by switching the contact of the switching circuit 86, and by connecting the base station transmission device 50 and the communication circuit 85 by switching the contact of the switching circuit 84. The communication circuit 85 can call a mobile station existing in another base station zone or another control station zone by using a normal line and can talk with the mobile station.

In this way, the base station main unit 10C is provided with the communication circuits 82 and 85, so that the base station main unit 10C positively transmits to mobile stations such as its own base station zone, other base station zones, and other control station zones. You will be able to call and make calls and perform central functions.

It should be noted that the base station 10 of FIG. 7 of the above-mentioned first embodiment.
In the functional configuration of A as well, the communication circuits 82 and 85 and the switching circuits 81, 83, 84, and 86 are provided in the same manner, so that the first
Also in the mobile communication system of the embodiment, it is possible to make a call actively by making a call to a mobile station such as its own base station zone, another base station zone, another control station zone or the like.

[0060]

As described above, according to the present invention, a base station apparatus receives a signal wirelessly transmitted from a mobile station apparatus, performs position registration by this received signal, and a call signal from the mobile station apparatus is transmitted. If received, check what the called party of this calling signal is, check whether the called party is registered in the location, and if registered, check the received calling signal. Since it is configured to wirelessly transmit to its own base station wireless zone, even if the line between the base station device and the control station device is disconnected, the effect of this line disconnection can be reduced, and the mobile station and other It is possible to realize a highly reliable mobile communication system in which communication can be secured to some extent.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a mobile communication system according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a basic system of a conventional public mobile digital mobile communication system, and in particular, is a diagram showing a signal path when a terminating mobile station exists in the same base station zone as the originating mobile station.

FIG. 3 is a schematic configuration diagram of a basic system of a conventional digital mobile communication system for public service, particularly a signal path when an originating mobile station and a terminating mobile station are in the same control zone but different base station zones. FIG.

FIG. 4 is a schematic configuration diagram of a basic system of a conventional digital mobile communication system for public service, particularly when the originating mobile station and the terminating mobile station are in different control zones or connected to a terminal connected to a private exchange network. It is a figure which shows the signal path at the time of doing.

FIG. 5 is a schematic configuration diagram of a basic system of a conventional digital mobile communication system for public works, and is a diagram for explaining a problem particularly when a line between a base station and a control station is disconnected. .

FIG. 6 is a diagram for explaining an operation in the mobile communication system according to the first embodiment when the line between the base station and the control station is disconnected.

FIG. 7 is a detailed configuration diagram of a base station in the mobile communication system according to the first embodiment.

FIG. 8 is a functional configuration diagram of a base station used in the mobile communication system of the second embodiment.

[Fig. 9] Fig. 9 is a configuration diagram of a mobile communication system for explaining a problem when it is desired to connect a line from a base station to a mobile station.

FIG. 10 is a configuration diagram of a mobile communication system for explaining a problem when a line between a base station and a control station is disconnected.

FIG. 11 is a schematic configuration diagram of a mobile communication system of a third embodiment.

FIG. 12 is a detailed configuration diagram of an example of a base station in the mobile communication system of the third embodiment.

[Explanation of symbols]

1-3 mobile stations 10A, 10B, 10C, 20A base stations 30 control station 50 Base station transmitter 60 Base station main unit 65, 66 switching circuit 68 Control circuit 69 Position registration circuit

Claims (5)

(57) [Claims] 1. A call signal transmitted from a first mobile station device
The position of the mobile station device via the nearest first base station device
To the first control station device that manages the
In the wireless zone of the other second base station device under the control of the station device
Receiving to the existing second mobile station device, or the transfer
Received from the first control station device to another second control station device
The call is received by the second mobile station device or terminal device under control.
The first mobile station device and the second mobile station device, or
In mobile communication systems that communicate with terminal devices
Then, the first base station device, Receives a signal wirelessly transmitted from the first mobile station device
Location registration means for performing location registration by this received signal
When, When a calling signal from the third mobile station device is received,
Check what the other party of the call signal is
Check if the hand is registered in the location registration means
If it is registered, the received call signal will
Return switching transmission means for wireless transmission to the base station wireless zone
When, Between the first base station device and the first control station device
If the line connection is disconnected, the return switching transmission means
If the line connection is normal, switch back
The operation of the transmitting means is stopped, and instead of the above, the third
When the calling signal is received from the mobile station device of the
Control means for transferring to the control station device of The first control station device receives and transmits signals from the base station device.
Check the destination of the call signal, and check the destination depending on the destination.
Transfer means for controlling transfer of received call signal Characterized by including
Mobile communication system. 2. The mobile communication system according to claim 1, wherein the first control station device is the first base station device.
Connection between the storage device and the first control station device is disconnected
Becomes a mobile station device belonging to the first base station device.
Delete the management position of the mobile station device
A mobile communication system comprising management position deleting means . 3. The mobile communication system according to any one of claims 1 to 2, wherein the first base station apparatus, originating
A mobile station device in the own base station zone for generating a call signal or the first
A mobile communication system including communication means for transmitting to and communicating with the control station device . 4.Receives the mobile station call signal and transfers it to the control station.
In the transmitting base station device, the device is The mobile station signal is received and the received mobile station signal is used.
Location registration means for performing location registration of the mobile station device, When the mobile station calling signal is received, the mobile station calling signal is received.
Check what the callee of the signal is,
Check whether it is registered in the location registration means, and register.
If it is recorded, the received mobile station call signal is
Return switching transmission means for wireless transmission to the base station wireless zone
When, Between the base station device and the control station device on the control station side
If the line connection is disconnected, use the loopback switching transmission means.
If it is operated and the line connection is normal, the above loopback switching
The operation of the transmitting means is stopped, and instead of the mobile station
When the calling signal is received from the device, the control station device
Control means to transfer Is characterized by includingBase station equipment
Setting. 5.The position of the mobile station device by the computer
Management and control of processing for call signals from mobile stations
Connection between the base station device and the control station device.
Base station control program for controlling processing for connection
Is a recording medium that records The base station control program causes a computer to The movement based on the transmission signal received from the mobile station device
Register and manage the location of station equipment, Based on the mobile station call signal received from the mobile station device,
Check what the other party of the mobile station call signal is,
If the location of the called party is already registered,
The mobile station call signal is sent back to the
Control to The line connection between the base station device and the control station device is disconnected.
In the case of disconnection, control to send back wireless transmission is performed.
If the line connection is normal, the return wireless transmission
Control to stop the communication, and instead,
The mobile station device When the calling signal is received from
It is special to have the control to transfer to the local device.
Recording medium recording the base station control program to be recorded .