JPH0828906B2 - Wide area mobile communication system and mobile terminal device thereof - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wide area mobile communication system and a mobile terminal device therefor, and more particularly to a control station for controlling a wireless line composed of a control channel and a call channel in a wireless zone to which the wireless line belongs, and via this wireless line. The present invention relates to a mobile communication system of the MCA system including a command station and a subscriber composed of mobile stations that communicate with each other and a mobile terminal device thereof.

[0002]

MCA as one of mobile communication systems
Although there is a system, this MCA system, as described in the following documents, has a control channel associated with a plurality of frequencies of wireless carrier waves in a large-scale wireless service zone with a radius of 20 to 30 km. One control station (wireless base station) that relays and controls a communication channel, and a fixed command station that transmits and receives wirelessly to and from each other via the control station for each same subscriber group It is configured to include stations.

The mobile communication system based on the MCA method limits the call time for each call, and a plurality of call channels are shared by a large number of subscribers (command station and mobile station) within a large single radio zone. Each time a subscriber makes a call, it automatically selects and uses a vacant call channel, so that valuable radio resources can be effectively used, and compared to a cellular car phone / cell phone system, it is more wireless. It does not require an exchange for tracking and exchange connected to the base station, a location registration memory, or the like, which is advantageous in cost.

When the service area is expanded, a plurality of wireless zones are provided adjacent to each other, and radio waves are relayed between the control stations in the adjacent zones so that the home / home to which the subscriber belongs can be expanded.
It is designed so that connection service can be provided between a zone and a zone adjacent to the zone. As a document, NEC Technical Report (published in 1982) VOL35, N
o. 12, pages 50-90, "Special Issue on MCA Systems"
There is.

[0005]

DISCLOSURE OF THE INVENTION The conventional MCA described above
In the mobile communication system using the method, the number of registered subscribers has been increasing more and more recently due to low cost and ease of use, and expansion of service area is required. However, in order to expand the service area, radio zones must be provided adjacent to each other and relay between them by radio waves. For this reason, the power of the output radio wave of the control station must be increased so that it can reach not only the range of its own zone but also the control station of the other party. Moreover, since the radio wave cannot be relayed to a remote wireless zone which is not adjacent, the service area cannot be expanded. In this case, even if a plurality of wireless zones adjacent to each other are connected between the remote wireless zones to forcibly connect to each other, the amount of radio resource (call channel) held in each zone is limited, and As a result of prioritizing calls between subscribers, it is virtually impossible to connect between zones. In other words, even if the mobile station is able to connect to the command station within a certain zone, the connection with the command station is not continued when moving between zones, and it is impossible to call the mobile station in another zone. .

In this way, the communication between the command station and the mobile station via the radio line via the control station only within the same zone means that a dedicated exchange or position registration for tracking exchange of the mobile station such as a car telephone system is performed. It is also a feature of the MCA method that emphasizes economy without using expensive equipment such as memory.
In order to expand the service area more than at present, it is rather demanded to develop a cheaper system for small-scale and a wireless base station.

An object of the present invention is, without impairing the economic advantage of a mobile communication system according to MCA system, capable of communicating with the mobile station and the command station among a plurality of radio zones mutual scattered over a wide range of areas It is to provide a wide area mobile communication system and a mobile terminal device used for the mobile station.

[0008]

A wide area mobile communication system according to a first aspect of the present invention comprises a control channel and a communication channel in each of the plurality of wireless zones distributed over a wide area and belonging to each of the wireless zones. In an MCA type mobile communication system comprising a control station having a radio device for controlling a radio line, and a subscriber comprising a command station and a mobile station communicating with each other via the radio line, an FM
To collect a calling signal including a calling identification number for the mobile station connected to the transmitting station and transmitted from the control station, and to insert the calling signal into the data channel of the FM multiplex broadcast wave transmitted from the FM transmitting station over the entire service area of the system. A call for sending the call signal to the FM transmitting station
A wired line connecting means, which is provided with a center, in which the control station connects to an exchange network and performs transmission / reception via a wired line, and a wide area indicating a connection request from the subscriber to a subscriber in another wireless zone via the wireless device. The connection request information is received, the wired line connection means is controlled based on the connection request destination zone number in the wide area connection request information, and a connection is made with the control station of the other wireless zone via the switching network, The inter-zone connection means for transmitting the connection request destination subscriber number in the wide area connection request information, and the wireless device is controlled based on the connection request destination subscriber number received from another control station via the wired line connection means. And a line control means for setting a wireless line with the subscriber who is the connection request destination, an information transfer means for controlling information transfer between the wireless device and the wired line connection means, and the wireless device. Through Wide area connection request information including the call identification number indicating a wide area call to a mobile station other than the own station's wireless zone is received from the command station, and the call is made to the call center via the wired line connection means and the switching network. Wide area calling means for transmitting an identification number, and the mobile station includes FM reception detecting means for receiving the FM multiplex broadcast radio wave and detecting a call addressed to itself based on the call identification number in the calling signal. , The mobile station and the command station in different radio zones are configured to communicate with each other via the control station in each radio zone and the switching network connecting these control stations. .

[0009] The registration wide area mobile communication system of the second invention, in the wide-area mobile communication system of the first invention, the control station, to register whether to accept the connection request from the mobile station Means, determining whether or not to accept by referring to the registration means when receiving a connection request from the mobile station to the command station in another wireless zone via the wireless device,
If acceptance is possible, the line connection means and the information transfer means are activated to connect to the command station in the other wireless zone via the switching network, create billing information for the mobile station, and create charging information for the other wireless zone. And a billing control means for sending to the control station.

A mobile terminal device according to a third aspect of the present invention is the mobile terminal device used in the mobile station of the wide area mobile communication system according to the first or the second aspect of the invention, wherein a wireless channel including a control channel and a call channel is provided. A transmission / reception unit connected to any of a plurality of control stations for transmitting and receiving various control signals and call signals, an input / output unit for man-machine interface of the control signals and call signals, and a wireless circuit being received by the transmission / reception unit. SN ratio monitoring means for monitoring the SN ratio on the line and detecting whether it is above a predetermined level,
The transmitting / receiving means and the input / output means are controlled, one of the plurality of control stations is selected according to the detection result of the SN ratio monitoring means, and the zone number and the subscriber number of the command station of the connection request destination to the selected control station. And a control means for transmitting the wide area connection request information including the information and communicating with the command station of the connection request destination.

[0011] The mobile terminal device of the fourth invention, in the mobile terminal device of the third invention, and FM multiple receive means for extracting data channels multiplexed receives FM multiplex broadcast radio wave, advance own station And an identification number detecting means for storing whether or not the calling identification number of the local station is included in the output signal of the FM multiplex receiving means. The detection result of the number detecting means is displayed on the input / output means.

Further, the fifth mobile terminal apparatus of the present invention is directed to the mobile terminal device of the fourth invention, the FM multiplex receiver means, most SN good frequency sweep subcarriers channel for the data channel ratio It has an FM multiplex reception circuit with a channel automatic sweeping function.

[0013]

Next, the present invention will be described with reference to the drawings.

FIG . 1 is a system configuration diagram of an embodiment of the present invention.

The wide area mobile communication system shown in FIG . 1 has a plurality of radio zones 10 each having a radius of several kilometers to several tens of kilometers.
An exchange network 5 such as an existing telephone exchange at the center of each of 1 to 105
Each of the control stations 201 to 205 connected to each other via 00 is provided. Command station 3 that is a subscriber
Each of 01 to 305 and each of the mobile stations 400 to 405 are registered for each of the same subscriber groups as one of the wireless zones 101 to 105 as a home zone. The command station 3
The division of the subscriber groups of 01 to 305 and mobile stations 400 to 405 can be changed. In addition, each command station 301 to 305
Is fixedly installed in the home zone, and it is possible to perform transmission and reception with only a control station in the wireless zone through a wireless line (a control channel corresponding to a frequency, a communication channel). Each of the mobile stations 400 to 405 is installed in a vehicle, can freely move inside and outside the home zone, and can register communication permission in a plurality of arbitrary wireless zones (including the home zone). Any wireless zone (registration zone) can perform transmission / reception via a wireless line with a control station in the registered zone.

The call center 600 has dedicated lines 521, 5
22 is directly connected to each of the control stations 201 to 205 via the private line 520 and the switching network 500, and receives and collects data for a wide area call. The calling center 600 is connected to the existing FM transmitting station 610 and sends out this data. The FM transmitter station 610 is
The data signal from the calling center 600 is multiplexed with the audio signal of the radio broadcast, and the antenna 61 is used as an FM multiplex broadcast wave.
1 to the inside and outside of each of the wireless zones 101 to 105. The frequency band of radio waves used by each control station, command station, mobile station, and FM transmitting station is generally around 800 MHz, but other frequency bands may be used.

FIG . 2 is a block diagram of an embodiment of a control station device provided in the control stations 201 to 205 of the present invention.

[0018] Additional control station apparatus; send and receive radio transport frequency signal consisting of a segmented control channel frequency as traffic channel between the command station and a mobile station, a relay, a wireless device 210 that controls, only Wired line connection device 270 that performs a connection process with a control station device in another wireless zone and a connection process with a call center 600 via a line and a switching network.
When a wide area call request (including an ID number) to the mobile station is detected from the command station based on the reception information of the wireless device 210, the call center 6 is sent via the wired line connection device 270.
A wide area calling device 230 for sending an ID number to 00; a wide area connection request to a command station or mobile station in a different wireless zone from a mobile station or command station registered based on the reception information of the wireless device 210 (connection request destination zone number) And the subscriber number) are detected, the inter-zone connection device 240 that accesses the switching network through the wired line connection device 270 and connects with the control station device of the wireless zone of the corresponding zone number;
Home zone subscriber billing information device 250 that has a memory, registers a command station and a mobile station whose home zone is the home zone, and creates and stores billing information for these.
And; register mobile stations that have a memory and are not permitted to communicate with their own zone as the home zone (in the non-home zone), create billing information for them, and use the wired line connection device 270 to make home A non-home zone subscriber charging information device 260 for sending to the control station device of the zone; controlling each of the above devices in the control station device and transferring information between the wireless device 210 and the wired line connection device 270. , The wireless device 2 according to the connection request destination subscriber number received from another control station.
A central control unit 220 which sets up 10 channels and stores the billing information received from other control stations in the home zone subscriber billing information unit 250.

The radio unit 210 is also a central control unit 2.
It operates under the control of 20 and analyzes an uplink control signal including connection request information received from a command station and a mobile station via a wireless line, and receives it from a control station in another wireless zone via a wired line. The connection destination subscriber number is analyzed, and a downlink control signal including various designation information and notification information to the command station and the mobile station is created according to the analysis result and the operating state of the system. A wireless line control unit 217 for controlling channel selection and transmission / reception of a call signal to and from;
A control channel transmitter 213 and a communication channel transmitter 214 that output a downlink control signal for one channel and a frequency-modulated radio carrier frequency signal for a downlink call signal for a maximum of 15 channels under the control of the wireless line controller 217, respectively. And; a control channel receiver 215 and a communication channel for receiving and demodulating a frequency-modulated radio carrier frequency signal of one channel of upstream control signal and maximum 15 channels of upstream communication signal under the control of the wireless line controller 217. Receiver 216 and antenna duplexer 2
Control channel transmitter 213, communication channel transmitter 214, and control channel receiver 215
And an antenna 211 that is connected to the call channel receiver 216 and transmits / receives radio waves to / from a command station and a mobile station.

[0020] The basic configuration of this wireless device 210,
Since the operation is the same as that of the conventional technique, detailed description will be omitted.

FIG . 3 is a block diagram of an embodiment of a mobile terminal device provided in the mobile stations 400 to 405 of the present invention.

The above mobile terminal device includes: a control unit 460 for controlling the operation of each unit and circuit within the mobile terminal device; an antenna 411 for transmitting and receiving radio waves; and a frequency corresponding to the transmission and reception frequencies of the control channel and communication channel. A synthesizer unit 440 for respectively outputting local oscillation signals of; and a reception for receiving radio carrier frequency signals of the downlink control channel and the downlink communication channel from the control station via the antenna 411 and the antenna duplexer 412 according to the output of the synthesizer unit 440. Section 450; transmitting section 430 for transmitting radio carrier frequency signals of the uplink control channel and the uplink communication channel to the control station via the antenna 411 and the antenna duplexer 412 according to the output of the synthesizer section 440; Interface with people, voice,
A speaker 471 for outputting sound, a microphone 472 for inputting voice, a display unit 473 for displaying lamps or characters such as data and status, and a switch unit 4 for inputting commands and data by operating keys and buttons.
An input / output operation unit 470 including an antenna 411;
And an FM multiplex reception circuit 421 that receives the FM multiplex signal from the FM transmission station 610 via the antenna duplexer 412 and extracts the data channel on the subcarrier; and its own ID number (zone number of home zone and An ID detection circuit 422 that stores a subscriber number) and notifies the control unit 460 when the own ID number is detected from the output of the FM multiplex reception circuit 421. Note that an input antenna of the FM multiplex reception circuit 421 may be provided separately from the antenna 411 and may be directly connected without passing through the antenna duplexer 412. In this case, the frequency band of the transmission / reception radio wave between the control station, the command station, and the mobile station and the frequency band of the transmission radio wave of the FM transmission station can be significantly different.

The receiving section 450 includes a high frequency amplifier circuit for amplifying a radio carrier frequency signal input from the control station through the antenna 411; a frequency of a local oscillation signal supplied from the synthesizer section 440. A mixing circuit for selecting one of a control channel and a communication channel and converting an input signal of the channel into an intermediate frequency signal; an intermediate frequency amplification circuit for amplifying an intermediate frequency signal output from the mixing circuit; A discrimination circuit for inputting the intermediate frequency signal to discriminate whether the input signal is a voice signal or a data signal; a voice frequency amplification circuit for amplifying the signal output from the discrimination circuit when the input signal is a voice signal; A data demodulation circuit for demodulating into a digital signal when is a data signal; monitoring the SN ratio of the input signal and checking whether the SN ratio is a predetermined value or more. And a SN ratio monitoring circuit constant. Then, the audio frequency signal amplified by the audio frequency amplifier circuit is sent to the control unit 460 and output from the speaker 471. The digital signal output from the data demodulation circuit is also output to the control unit 460, and the determination result of the SN ratio monitoring circuit is also notified to the control unit 460.

In FIG. 1, if the area where the radio waves transmitted by the FM transmitting station 610 effectively reach is smaller than the service application area of this system, a plurality of FM transmitting stations 610 are provided. When the frequencies of the subcarrier channels for the data channels of the FM multiplex broadcast radio waves of the FM transmitting stations 610 are different, the FM multiplex receiving circuit 421 in the mobile terminal device of FIG. ) Frequency sweep of subcarrier channel for judgment,
It can be an FM multiplex reception circuit with a channel automatic sweep function to be selected.

Further, the FM broadcast radio wave data-multiplexed by the FM transmitting station 610 is not for radio broadcasting,
It may be for audio of television broadcasting. An example of the baseband spectrum of the FM multiplex signal in this case is shown in FIG.
Shown in In FIG. 7, data channels for accommodating data for wide area call are multiplexed together with main voice and sub-voice.

The command station device provided in the command stations 301 to 305 of the present invention is the same as the command terminal device of FIG.
The FM multiplex reception circuit 421 and the ID detection circuit 422 can have the same configuration as that of the first embodiment, and thus detailed description thereof will be omitted.

Next, the operation will be described with reference to FIGS.

The mobile station 401 belongs to the same subscriber group whose home zone is the command station 301 and the wireless zone 101,
Communication permission is registered for the wireless zones 101 and 102. When the mobile station 401 is in the wireless zone 101 (point A) which is the home zone, the mobile station 401 wirelessly communicates with the command station 301 via the control station 201 by a method similar to the conventional MCA method. The detailed operation explanation is omitted. At this time, the control station 201 specifies the call channel using the control channel and limits the call time per call to 1 minute or 3 minutes. The mobile station 401 monitors the SN ratio on the wireless communication line between the mobile station 401 and the control station 201 with the SN ratio monitoring circuit of the receiving unit 450, and if it is a predetermined value or more, the mobile station 401 is its own station. Is determined to be in the wireless zone 101, and the general connection request indicating the intra-zone connection request to the control station 201 as many times as necessary to communicate with the command station 301 (connection request type code in the uplink control signal Is set to "01").

If the mobile station 401 moves to the wireless zone 102 (point C) via point B, S
When the SN ratio of the signal from the control station 201 becomes worse than a predetermined value, the N ratio monitoring circuit detects this value and notifies the control unit 460. The control unit 460 controls the synthesizer unit 440 and the transmission unit 430 to switch the frequency of the uplink control channel to that for the control station 202, and a wide area connection request signal indicating a connection request to the command station 301 in the wireless zone 101 via the switching network 500. (Connection request type code "1
1 "and call signal including zone number, subscriber number, etc.)
To the control station 202 in the wireless zone 102. When the control station 202 recognizes from the home zone subscriber billing information device 250 that the mobile station 401 is not a mobile station whose home zone (wireless zone 102) is the home zone,
The non-home zone subscriber charging information device 260 determines whether or not the mobile station 401 is a mobile station for which communication permission for the wireless zone 101 is registered. If it is not registered, the control station 202 does not accept the connection request of the mobile station 401. When the control station 202 confirms that the mobile station 401 is registered, it activates the inter-zone connection device 240 based on the zone number of the connection request destination in the call signal, and connects the wired line connection device 270, the dedicated line 512, and the exchange. The control station 201 is connected to the control station 201 via the network 500 and the dedicated line 511 by a wired line to send the subscriber number of the connection request destination, and at the same time, the communication channel is assigned to the mobile station 401. Control station 2
01 assigns a call channel to the command station 301 based on the subscriber number sent from the control station 202, and notifies that it is an out-of-service call. By this notification, the out-of-service call lamp of the display unit of the command station device of the command station 301 (corresponding to the display unit 473 of the mobile terminal device of FIG. 3) can be turned on.

[0030] As a result, the call signal from the mobile station 401, the wireless device 210 of the control station 202, central control unit 22
0, sent to the switching network 500 via the wired line connection device 270, and further connected to the wired line connection device 27 of the control station 201.
0, the central control device 220, and the wireless device 210 to be transmitted to the command station 301. On the other hand, the call signal from the command station 301 is transmitted to the mobile station 401 by a route opposite to the above.

The mobile station 4 in the control station 202 at this time
The billing information for 01 is created by the non-home zone subscriber billing information device 260 for each call, sent to the control station 201 by the above route, and stored in the home zone subscriber billing information device 250. This control station 201
In the home zone subscriber billing information device 250, the billing information of the command station 301 and the mobile station 401 are assigned to the wireless zone 10.
The billing information when it was 1 is stored together.

In the above description, the operation when the mobile station 401 moves from the wireless zone 101 to the wireless zone 102 has been described. However, when the mobile station 401 is in the wireless zone 102 from the beginning and a call is started. The operation is similar to the above. Further, even when the mobile station 403 is registered in the wireless zone 103 remote from the wireless zone 101 to permit the command station 301, the control station 203 and the control station 201 operate the switching network 500 in the same manner as above. The mobile station 403 and the command station 301 are connected via this connection path.
Can communicate with. FIG. 4 shows an inter-station connection operation sequence in such a case, that is, when a mobile station in a certain wireless zone makes a call (call) to a command station in another wireless zone.

[0033] Next, the operation will be described with reference also the sequence diagram of FIG. 5 when a call (call) from the command station to the mobile station being in addition its own zone (home zone). As an example,
A case where the command station 301 in the wireless zone 101 calls the mobile station 403 will be described. Since the command station 301 normally does not know where the mobile station 403 is, it first sends a general connection request signal (connection request classification code “01”) to the control station 201 as if it were in its own zone. Command station 201
If there is no response from the mobile station 403 within a certain time, the mobile station 403 recognizes that the mobile station 403 is not in its own zone, and sends to the control station 201 a wide area connection request signal indicating a wide area call request to the mobile station 403 (connection request type code “00”). And a call signal including the ID number of the mobile station). Upon receiving the call signal for the wide area connection, the control station 201 activates the wide area call device 230 and sends the call signal to the call center 600 via the wired line connection device 270 and the dedicated line 521. The calling center 600 sends this calling signal to the FM transmitting station 610 together with the calling signals from other control stations, and broadcasts it over the entire system including all the wireless zones 101 to 105 by FM multiplex broadcasting waves.

The wireless zone 103 which is a registration zone
Upon receiving this FM multiplex broadcast wave, the mobile station 403 located in the center extracts the calling signal in the data channel by the FM multiplex receiving circuit 421, and the ID detecting circuit 422 matches its own ID number with the extracted calling signal. Whether or not,
When a match is detected, the control unit 460 is notified. Control unit 46
0 recognizes that there is a call from the command station 301 of the home zone, lights the call lamp of the display unit 473, or causes the speaker 471 to generate a sound to indicate that the user has called. Inform. When the user operates a button on the switch unit 474, the control unit 460 sends a wide area connection request signal requesting a connection with the command station 301 to the control station 203. Hereinafter, the same operations as in the case of the call from the mobile station described above are performed via the switching network 500 to the control station 2
03 and the control station 201 are connected, and a call can be made between the mobile station 403 and the command station 301.

In addition, a call from the command station 301 to the mobile station 400 (point D) which is not in any of the wireless zones 101 to 105 is also performed by the F transmission from the FM transmission station 610 in the same manner as above.
It is performed by M multiplex broadcasting waves. When the mobile station 400 detects a call addressed to itself, the mobile station 400 lights the call lamp of the display unit 473 to notify the user that there is a call, but at this point, communication with any control station is impossible. is there. The user moves the mobile station 400 to any registration zone, for example, within the wireless zone 104 (point E), and then accesses the control station 204, and the command station via the switching network 500 and the control station 201 by the above-described method. Communicate with 301.

It is to be noted that, on the command station side, the mobile station is in advance which radio zone (registration zone) other than the home zone.
If it knows that the connection request type code is "11" from the command station to the control station, the corresponding zone number and mobile station ID number are set as in the wide area connection request operation from the mobile station to the command station. By sending the specified wide area connection request signal, the control station on the command station side is connected to the control station on the mobile station side via the switching network without making a wide area call request to the call center. The control station calls the mobile station and the command station can communicate with the mobile station.

Next, as a call media for wide area of the mobile station, rather than the terrestrial FM broadcasting system, an embodiment using the satellite system.

In this embodiment (not shown), a satellite ground station is provided in place of the FM transmitting station 610 in the embodiment shown in FIG. 1, and the ID of the mobile station to be called which is transmitted from this satellite ground station. A satellite that receives a relay radio wave including a number and transmits a satellite broadcast radio wave that covers the entire service area of the system is provided, and a satellite broadcast reception circuit is provided in place of the FM multiplex reception circuit 421 in the mobile terminal device shown in FIG. The mobile station detects its own ID number from the broadcast wave from the satellite.

FIG . 6 is a diagram showing a sequence of inter-station connection operation at the time of making a wide area call to a mobile station in a mobile communication system to which the present invention is applied.

The system (not shown) for performing the inter-station connection operation in the sequence shown in FIG . 6 differs from the system shown in FIGS. 1 to 3 described above in that the system is connected to a switching network via a subscriber line and controlled. A command line device is equipped with a wired line connection control circuit that automatically sends (calls) dial signals under the control of the control section to access the switching network and transfers information between the calling center and the control station via the switching network. Another point is that the control station device is provided with means for accessing the exchange network according to the dial number of the command station received from the mobile station via the wireless line and transferring information directly to the command station device via the exchange network.

In FIG . 6, when the command station calls a mobile station, if there is no response from within its own zone, it is directly connected to the call center via the switching network and a call request signal including the ID number of the mobile station to be called. Is sent. Call center and F
The operation with the M transmitting station is similar to that of the above-described embodiment. Also,
When the mobile station detects the call of its own station, it makes a wide area connection request to the control station, including the dial number of the command station, and the control station calls the command station via the switching network according to the command station dial number from the mobile station. Connecting. The dial number of the command station may be stored in the mobile station in advance, or may be included in the call request signal to the call center. As described above, it becomes possible to communicate with the mobile station even when the command station is located in a place other than the home zone or when the wireless line with the control station cannot be used.

[0042]

According to the wide area mobile communication system of the present invention,
In a CA mobile communication system, each control station of a plurality of wireless zones distributed over a wide area is accommodated in a switching network, and each control station receives a subscriber in its own wireless zone via a wireless device ( When receiving a wide area connection request from a mobile station / command station) to a subscriber (command station / mobile station) in another wireless zone, a cable that connects to the control station of the corresponding zone by a wired line via the switching network Since it is provided with a line connection means and an inter-zone connection means, and a line control means and an information transfer means for controlling information transfer between a wireless line on the side of a wireless device and a wired line on the side of a switched network, wireless lines remote from each other are provided. A command station and a mobile station in each zone can communicate with each other via the switching network. Therefore, it is not necessary to increase the radio wave output level of the control station and the radio wave resources (the number of channels) can be used more effectively as compared with the conventional case of relaying radio waves between adjacent zones. Furthermore, since the existing switching network can be used, it is possible to suppress an increase in equipment cost accompanying the expansion of the service area.

In the wide area mobile communication system of the present invention, the control station in the wireless zone (home zone) where the command station is located is determined by determining whether or not the mobile station in the own wireless zone can be accepted. By providing the control station with the registration means and the charging control means for sending to the mobile station, the charging information of the command station and the mobile station belonging to the same subscriber group can be centrally managed by the control station in the home zone.

[0044] In addition, a wide area mobile communication system of the present invention,
A call center for inserting a call identification number for a mobile station into an FM multiplex broadcast wave (or satellite broadcast wave) transmitted from the FM transmitter station (or satellite) over the entire service area of the system is provided, and a wide area call from the command station to the mobile station is provided. An FM reception detecting means for detecting a call identification number of the own station from an FM multiplex broadcast wave (or satellite broadcast wave) by providing a control station with a wide area call means for transmitting a designated call identification number to a call center when a connection request is received. By providing the mobile station with (or satellite reception detecting means), it is possible to detect a call from the command station regardless of where the mobile station is inside or outside the wireless zone. For this reason, it is not necessary to use an enormous and expensive switch for tracking and exchange and a vehicle (mobile station) location registration memory such as a cellular car telephone system. Further, the FM transmitting station and the satellite can use the existing system and equipment.

The mobile terminal device according to the present invention comprises an SN ratio monitoring means for monitoring the SN ratio on the radio line between the transmitting / receiving means and the input / output means, and the transmitting / receiving means according to the SN ratio monitoring result. Control station to select a control station in an appropriate wireless zone to continue communication and to set a communication path with the command station via the switching network. Communication with the command station can be continued even when moving across the zone.

Further , the mobile terminal device of the present invention is equipped with an FM reception detecting means (or satellite reception detecting means) for detecting the calling identification number of its own station from the FM multiplex broadcast radio wave (or satellite broadcast radio wave), and thereby the radio communication is carried out. A call from the command station can be detected regardless of whether it is within the zone or not.

As described above, according to the present invention, since the switching network, the FM transmitting station and the satellite can be used, a dedicated tracking exchange and a location registration memory are not required. Tracking connection across multiple wireless zones when communicating between a command station and a mobile station between multiple wireless zones scattered over a wide area without impairing the economic advantages of the MCA type mobile communication system. In addition, there is an effect that a wide area call connection that spans a plurality of wireless zones and a call in an area other than the wireless zones can be performed. At this time, the use efficiency of the radio wave channel owned by the control station in each wireless zone is not reduced, and the service can be provided even in a low traffic area.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of an embodiment of the present invention.

2 is a block diagram of an embodiment of a control station device used in the control station of FIG. 1. FIG.

FIG. 3 is a block diagram of an embodiment of a mobile terminal device used in the mobile station of FIG.

FIG. 4 is a diagram showing an inter-station connection operation sequence when a mobile station of the present invention requests a wide area connection to a command station.

FIG. 5 is a diagram showing an inter-station connection operation sequence when a command station of the present invention requests a wide area call connection to a mobile station.

FIG. 6 is a diagram showing an inter-station connection operation sequence when a command station of a system to which the present invention is applied requests a wide area call connection to a mobile station.

FIG. 7 is a diagram showing an example of a baseband spectrum of an FM multiplex signal.

[Explanation of symbols]

 101-105 wireless zone 201-205 control station 210 wireless device 211 antenna 212 antenna duplexer 213 control channel transmission unit 214 communication channel transmission unit 215 control channel reception unit 216 communication channel reception unit 217 wireless circuit control unit 220 central Control device 230 Wide area calling device 240 Inter-zone connection device 250 Home zone subscriber charging information device 260 Non-home zone subscriber charging information device 270 Wired line connection device 301-305 Command station 400-405 Mobile station 411 Antenna 412 Antenna sharing Device 421 FM multiplex reception circuit 422 ID detection circuit 430 Transmission unit 440 Synthesizer unit 450 Reception unit 460 Control unit 470 Input / output operation unit 471 Speaker 472 Microphone 473 Display unit 474 Switch Switch 500 Switching network 600 Call center 610 FM transmitter 611 Antenna

Continuation of the front page (56) Reference JP-A-58-170134 (JP, A) JP-A-49-131502 (JP, A) JP-A-63-13531 (JP, A) JP-A-63-244982 (JP , A)

Claims (5)

[Claims] 1. A control station having a radio device for controlling a radio line consisting of a control channel and a communication channel in each of the plurality of radio zones distributed and arranged over a wide area, and the radio station. In an MCA type mobile communication system comprising a command station and a subscriber consisting of mobile stations which communicate with each other via a line, a call identification number for the mobile station transmitted from the control station and connected to an FM transmission station is included. Collect call signals, F
A call for sending the ringing signal to the FM transmitting station for insertion into the data channel of the FM multiplex broadcast wave transmitted from the M transmitting station over the entire service area of the system.
A sending center is provided, and the control station represents a connection request from the subscriber to a subscriber in another wireless zone via the wireless device and a wired line connecting means for connecting to the switching network and transmitting / receiving by a wired line. It receives wide area connection request information, controls the wired line connection means based on the connection request destination zone number in the wide area connection request information, and connects with the control station of the other wireless zone via the switching network. , Inter-zone connection means for transmitting the connection request destination subscriber number in the wide area connection request information, and the wireless device based on the connection request destination subscriber number received from another control station via the wired line connection means. Line control means for controlling and setting a wireless line with a subscriber as a connection request destination, information transfer means for controlling information transfer between the wireless device and the wired line connection means, and the wireless device To Wide area connection request information including the call identification number indicating a wide area call to a mobile station other than the own station's wireless zone is received from the command station via the wired line connection means and the switching network to the call center. Wide area calling means for transmitting the calling identification number, the mobile station receives the FM multiplex broadcast wave, and FM reception detecting means for detecting a calling to the own station based on the calling identification number in the calling signal. Characterized in that the mobile station and the command station in different radio zones communicate with each other via the control station of each radio zone and the switching network connecting these control stations. Wide area mobile communication system. 2. A registration means for registering acceptance / non-acceptance of a connection request from the mobile station to the control station, and a connection request from the mobile station to a command station in another wireless zone via the wireless device. Upon receipt, the registration means is referred to determine whether acceptance is possible, and if acceptance is possible, the line connection means and the information transfer means are activated to connect to the command station in the other wireless zone via the exchange network. 2. The wide area mobile communication system according to claim 1, further comprising: charging control means for generating charging information for the mobile station and transmitting the charging information to a control station in the other wireless zone. 3. A mobile terminal device for use in a mobile station of the wide area mobile communication system according to claim 1, wherein the mobile terminal device is connected to any one of a plurality of control stations via a wireless line composed of a control channel and a communication channel. A transmitting / receiving means for transmitting / receiving a control signal and a call signal, an input / output means for taking a man-machine interface of the control signal and the call signal, and an SN ratio on the wireless line being received by the transmitting / receiving means are monitored to be above a predetermined level. SN to detect whether
The ratio monitoring means, the transmission / reception means, and the input / output means are controlled, one of the plurality of control stations is selected according to the detection result of the SN ratio monitoring means, and the zone of the command station of the connection request destination to the selected control station is selected. A mobile terminal device comprising: control means for transmitting wide area connection request information including a number and a subscriber number and for performing communication with the command station of the connection request destination. 4. An FM multiplex reception means for receiving an FM multiplex broadcast wave and extracting a multiplexed data channel, and a call identification number of the own station in advance, and the own station is included in an output signal of the FM multiplex reception means. claims call includes an FM reception detection unit having an identification number detecting means for detecting whether the identification number is included, and displaying the detection result of the identification number detecting means to said output means
Item 3. A mobile terminal device according to item 3 . Wherein said FM multiplex receiving means, characterized by having a good said FM multiple receive circuit with automatic channel sweep function subcarrier channel selected with a frequency sweep of data channels of the most SN ratio claims Item 4. The mobile terminal device according to item 4 .