JPH0670367A - Service broadcast system - Google Patents

Abstract

PURPOSE:To provide the service broadcast for the service broadcast especially in the simple cellular automobile radio (CRP) system with respect to the system implementing the service broadcast. CONSTITUTION:In the simple cellular automobile radio system in which plural mobile stations 1 use plural speech channels in common to make communication with a general subscriber via a base station 2, a broadcast equipment 3 being a source of the service broadcast is provided to the base station 2 and the speech channel in the idle state is used to implement the service broadcast from the base station 2 to the mobile station 1 and the mobile station 1 selects optionally the service to receive the service broadcast.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a service broadcasting system, and more particularly to a simplified automobile radio (Convenience Radius).
Phone (hereinafter abbreviated as CRP) relates to a service broadcasting system for performing service broadcasting in a system.

[0002] The CRP system is a car radio having a relatively simple system configuration and can be used at a lower cost and at a lower cost than the conventional public car phone system. , There are restrictions such as ringing time restriction and call area restriction (large zone method). However, except for these, it is comparable to the public car telephone system, and it has been developed for the purpose of use in a local city where the public car telephone system is not popular. There is.

In the CRP system, as a supplementary service that is not provided in the conventional public car telephone system, a method of using the area information and the like as a medium for providing the subscribers to the mobile station is constructed so that it can be used in the local community. It is desired to be able to contribute.

[0004]

2. Description of the Related Art In general, a communication system is basically operated by its subscribers independently, and in the case of mobile communication, a base station is usually considered as a line provider for that purpose. Therefore, the collection of necessary information has been done by the subscriber himself. For example, weather forecasts and time reports are good examples. On the other hand, the notification of a simultaneous command or the like from the base station is usually compulsory. In the public car telephone system, the control station in the case of the multiple channel access (MCA) system also notifies the mobile stations of a simultaneous command in this form.

FIG. 7 shows a flowchart of the simultaneous command operation in the conventional MCA control station. When issuing a simultaneous command, first release the queue for reservation registration of the call channel in the control station, cancel the connection of the call channel, and when the call channel becomes empty,
The end signal transmission on the broadcast command call channel is stopped, and the transmission on the broadcast command call channel is started. Then, send simultaneous command signals continuously on the control channel,
When the broadcast command is completed, the transmission of the broadcast command signal on the control channel is stopped, and the transmission on the broadcast command call channel is terminated.

FIG. 8 shows a flow chart of reception at the time of simultaneous command in a conventional MCA mobile station. When the mobile station tries to make a call, the MCA control station confirms that the call channel is available, confirms that the mobile station is registered in the control station, and then determines the declared call time. By setting the call channel, the mobile station enters the call operation state, and at the same time, sets the call timer. When the call is duplex communication, the tone signal is superimposed and transmitted when the simultaneous command is not in progress, and when the call is pressed when the simultaneous command is received, the tone signal is superimposed and transmitted when the simultaneous command is not in progress. To do. In either case, during the simultaneous command, the call is terminated without transmission by receiving the end signal from the control station, detecting the radio wave from the control station, or timeout the call timer of the mobile station. Upon completion, the control channel acquisition operation starts.

In this way, the notification of the simultaneous command in the case of the MCA system is forcibly performed, and the mobile station is
You cannot make calls.

[0008] On the other hand, in the case of the CRP system, a service broadcasting system in which a subscriber arbitrarily selects and receives a service broadcasting from a base station has not been conventionally performed.

[0009]

Therefore, in the case of realizing service broadcasting of regional information or the like in the CRP system, the following problems arise.

In the CRP system, as in the case of the public car telephone system, there are cases where a mobile station originates a call and cases where a general subscriber line other than the mobile station (hereinafter abbreviated as PSTN) receives a call to the mobile station. It has two routes. In this case, the outgoing call is made by the intention of the mobile station, but the incoming call is made independently of the intention of the mobile station.

Therefore, unless the base station can recognize that the specific mobile station is receiving the service broadcast, the PST
There is a problem that an incoming call from N to the mobile station cannot be processed.

Further, when the mobile station is in the state of receiving service broadcasting,
If the procedure for canceling the cancellation is forgotten, the incoming connection will not be made permanently, and the significance of the CRP system intended for the purpose of calling between subscribers will be lost. .

The present invention is intended to solve the problems of the prior art as described above, and in the CRP system,
By performing service broadcasting by using an idle channel of the call, the subscriber of the mobile station can select and receive area information and the like, and even if the mobile station is receiving the service broadcasting, the PSTN can be used. It is possible to process an incoming call to the mobile station and forcibly cancel the service broadcast reception state from the base station when the mobile station forgets to cancel the service broadcast reception state.
The purpose is to provide a service broadcasting system.

[0014]

SUMMARY OF THE INVENTION The present invention provides a service broadcasting in a simplified automobile radio system in which a plurality of mobile stations share a plurality of communication channels to communicate with general subscribers via a base station. Is provided in the base station, and service broadcasting is performed from the base station to the mobile station by using the communication channel in the non-communication state.

According to the present invention, in the above-mentioned service broadcasting system, at the time of service broadcasting, the base station notifies the mobile station of the service broadcast via the control channel, and the detection / display means for detecting / displaying the service broadcast notification. And the channel control means for switching the used call channel to the service broadcast channel in response to the switch operation, are provided in the mobile station.

Further, according to the present invention, in the above-mentioned service broadcasting system, at the time of service broadcasting, the mobile station notifies the base station via the control channel of the reception of the service broadcasting, and
A reception identification memory for registering a mobile station for service broadcast reception,
The base station is provided with an incoming call control means for controlling the incoming call from the general subscriber to the registered mobile station.

Further, according to the present invention, in the above-mentioned service broadcasting system, when the service broadcasting ends, the base station notifies the service broadcasting end via the control channel, and when the mobile station receives the notification, the communication channel of the channel control means is changed. It is characterized by canceling the setting and returning to the localization state.

[0018]

FIG. 1 shows the principle of the present invention. In the simplified automobile radio system, a plurality of mobile stations 1 share a plurality of communication channels and communicate with general subscribers via a base station 2. In such a simplified automobile radio system, a broadcasting device 3 which is a source of service broadcasting is provided in the base station 2, and the service broadcasting is performed from the base station 2 to the mobile station 1 by using a communication channel in a non-communication state. As a result, the simplified mobile radio system can be used as a medium for providing area information and the like to mobile station subscribers.

In this case, at the time of service broadcasting, the base station 2 notifies the mobile station 1 of the service broadcast via the control channel, and the mobile station 1 is provided with the detection / display means 4,
Since this service broadcast notification is detected and displayed, the channel control means 5 is provided, and the used call channel is switched to the service broadcast channel according to the switch operation.
The mobile station subscriber can arbitrarily select and receive the service broadcast without being forced by the base station.

At this time, when the service is broadcast, the mobile station 1
Sends a service broadcast reception notification to the base station 2 via the control channel, and a reception identification memory 6 for registering the mobile station receiving the service broadcast to the base station 2 and an incoming call from the general subscriber to the registered mobile station. On the other hand, since the incoming call control means 7 for performing control during a call is provided, it is possible to prevent the service broadcast from interfering with general communication.

At this time, when the service broadcast ends, the base station 2 notifies the service broadcast end via the control channel, and when the mobile station 1 receives the notification, the channel control means 5 cancels the setting of the call channel. By doing so, the system returns to the localization state, so that it is possible to prevent isolation from the system due to the failure to cancel the service broadcast receiving operation and the inability of the mobile station to receive a call from the base station.

[0022]

FIG. 2 shows the configuration of a base station according to an embodiment of the present invention, and shows the configuration of the base station mainly for line control when performing service broadcasting. Reference numeral 10 indicates a base station, and 20 indicates a plurality of mobile stations. In the base station 10, a line controller 11 has a plurality of communication channels # 1 to #n and a control channel.
An exchange (PBX) 12 connects each speech channel of the line control device 11 and a general subscriber line (PSTN). A broadcasting device 13 is a service source for performing service broadcasting. A common control unit 14 controls connection of the communication channels # 1 to #n and the control channel to each mobile station 20. Reference numeral 15 denotes a service broadcast receiving mobile station identification memory for registering a mobile station receiving a service broadcast.

When performing service broadcasting, the base station 10 first selects one channel out of empty channels (non-speech channels among speech channels). In FIG.
This indicates that channel #m has been selected. When a free channel is determined, the PSTN side line of the channel is blocked to prevent an incoming call from the PSTN and the allocation of the channel to the mobile station due to the call from the mobile station is stopped. In FIG. 2, the blockage during broadcasting indicates blockage of the PSTN side line due to selection of an empty channel.

Upon completion of this processing, the service broadcast notification frame including the service broadcast channel notification is transmitted using the transmission idle slot frame of the control channel to notify each mobile station. After that, connect the service broadcasting source such as the broadcasting device 13 to the designated call channel,
Send the broadcast content via the designated call channel. In addition,
The service broadcast annunciation frame by the control channel is constantly transmitted during the transmission of the broadcast content by using the empty slot of the control channel.

FIG. 3 shows the structure of a mobile station according to an embodiment of the present invention, which mainly shows the structure for receiving service broadcasts. Reference numeral 21 is a control channel receiver. A call unit 22 has call channels # 1 to #n. A service broadcast detection / display unit 23 detects the reception of the service broadcast notification in the control channel reception unit 21, and displays the fact using the display unit of the handset, for example. Reference numeral 24 is a channel control unit, which performs a switch operation for service broadcast reception using a dial key of a handset, for example. Reference numeral 25 is a speaker for emitting the received voice.

When the mobile station is in the localization state, the control channel receiving unit 21 always waits on the control channel. Therefore, by receiving the service broadcast notification frame, the service broadcast detecting / display unit 23 displays the service broadcast. When it is detected, the subscriber is notified by a liquid crystal display or the like. When the subscriber wants to listen to this broadcast content, he / she operates the switch for receiving the service broadcast in the channel control unit 24. As a result, the call unit 22
Since the channel is switched at, the mobile station can shift to the designated channel and receive the contents of the service broadcast. In FIG. 3, it is shown that the service broadcast is received via the communication channel # 2 in the communication unit 22.

4 and 5 show control states of a system composed of a base station and a mobile station. FIG. 4 is a flow chart of base station control in the service broadcasting system of the present invention, and FIG. 6 is a flowchart of mobile station control in the service broadcasting system of the present invention.

At the base station, at the start of service broadcasting,
First, a free channel is detected and the PSTN of the free channel is detected.
Block the side and stop the channel specification control from the mobile station. Next, a service broadcast notification frame indicating that the service is being broadcast is sent to the control channel, and a service source such as a broadcast device is connected to the corresponding empty channel. Then, the reception state of the mobile station is recognized by receiving the notification that the service broadcast is being received from the mobile station. As a result, the base station controls the incoming call by sending a busy tone (BUSY) to the general incoming call from the PSTN to the corresponding mobile station, as indicated by * A in the figure. When the broadcast contents have ended, a broadcast end frame is sent out.

When the mobile station receives the service broadcast notification frame indicating that the service is being broadcast on the control channel, the mobile station displays an indication of service broadcast reception to the subscriber. When the subscriber performs a key operation for receiving the service broadcast, the call section is switched to the service broadcast channel to receive the service broadcast. When the subscriber performs a key operation for canceling service broadcast reception, and when a service broadcast end frame is received on the control channel, the service broadcast reception state is terminated and the mode shifts to the normal mode.

FIG. 6 shows an operation sequence in the service broadcasting system of the present invention. (1) is a base station control channel transmission, (2) is a base station control channel reception, and (3) is a base station. Call channel transmission, (4) mobile station control channel transmission, (5) mobile station control channel reception,
(6) shows reception of mobile station communication channels.

Normally, the control channel receiving side of the base station receives a mobile station call signal for a general call as indicated by a general call A, B, C, ... In the figure. In response to the calling signal, the mobile station shifts to the designated channel and performs communication by the channel assignment designation for the response and the call, which is indicated by the call responses A, B, C, ... And the channel designation in the figure. I am supposed to do it.

When service broadcasting is performed from the base station, as shown by service notification in the figure, the service broadcast notification frame should be periodically transmitted to the empty slot of the control channel transmitted from the base station until the end of broadcasting. To notify the mobile station.

The mobile station detects this frame by receiving the control channel, and notifies the subscriber as shown in the service broadcast reception notification in the figure.

The mobile station subscriber switches the call section to the service broadcast channel by performing a key operation for service broadcast reception as shown by a service broadcast reception key operation in FIG. As indicated by A to n, the base station is notified by transmitting on the control channel that the local station is receiving the service broadcast.

When the base station receives this notification,
As shown by A station reception to n station reception, the mobile station is specifically recognized and registered in the service broadcast reception mobile station identification memory. Then, if a general incoming call occurs from the PSTN to the mobile station, as shown in FIG. 5 * A, the busy tone indicates that the mobile station is busy.
Notify the PSTN subscriber (caller).

The base station transmits a service broadcast end frame through the call channel when the service broadcast ends. As a result, as shown by service termination and restoration control in the figure, the service broadcast reception state of the mobile station is automatically canceled, and the control channel standby state is restored.

[0037]

As described above, according to the present invention, in the simplified mobile radio (CRP) system, when there is a vacancy in the call channel of the base station, the user (subscriber) uses this channel It is possible to provide service broadcasting to. This service broadcast is not forcibly transmitted from the base station, and its contents can be received by the mobile station subscriber's free choice. Also, in this case, by controlling the general incoming call to the mobile station receiving this service broadcast, it is possible to prevent the general communication from being disturbed, and at the end of the service broadcast, the service broadcast reception state of the mobile station is automatically By releasing
It is possible to prevent isolation from the system due to an inability to receive a call from the base station of the mobile station due to an erroneous operation of forgetting to cancel the service broadcast receiving operation.

As described above, according to the present invention, it becomes possible to perform service broadcasting in the CRP system, and by making the CRP system a fine media providing medium for mobile subscribers via the service broadcasting.
You will be able to contribute to the local community.

[Brief description of drawings]

FIG. 1 is a diagram showing a principle configuration of the present invention.

FIG. 2 is a diagram showing a configuration of a base station according to an embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a mobile station according to an embodiment of the present invention.

FIG. 4 is a flowchart of base station control in the service broadcasting system of the present invention.

FIG. 5 is a flowchart of mobile station control in the service broadcasting system of the present invention.

FIG. 6 shows an operation sequence in the service broadcasting system of the present invention, where (1) is base station control channel transmission, (2) is base station control channel reception, and (3) is base station speech channel transmission. , (4) shows mobile station control channel transmission, (5) shows mobile station control channel reception, and (6) shows mobile station speech channel reception.

FIG. 7 is a flowchart of a simultaneous command operation in a conventional MCA control station.

FIG. 8 is a flowchart of receiving a simultaneous command in a conventional MCA mobile station.

[Explanation of symbols]

 1 Mobile Station 2 Base Station 3 Broadcasting Device 4 Detection / Display Means 5 Channel Control Means 6 Reception Identification Memory

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[Procedure amendment]

[Submission date] July 14, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

FIG. 6 is a diagram showing an operation sequence in the service broadcasting system of the present invention.

Claims (4)

[Claims] 1. A simplified automobile radio system in which a plurality of mobile stations (1) share a plurality of communication channels and communicate with general subscribers through a base station (2), the source of service broadcasting. The broadcasting device (3) that becomes the base station (2)
The service broadcasting system is characterized in that the base station (2) broadcasts the service to the mobile station (1) by using a communication channel in a non-communication state. 2. The service broadcasting system according to claim 1, wherein at the time of service broadcasting, the base station (2) notifies the mobile station (1) of the service broadcasting via the control channel and detects the service broadcasting notification. A service broadcasting system characterized in that the mobile station (1) is provided with a detecting / displaying means (4) for displaying and a channel control means (5) for switching a use speech channel to a service broadcasting channel according to a switch operation. . 3. The service broadcasting system according to claim 1, wherein during the service broadcasting, the mobile station (1) notifies the base station (2) of the service broadcasting reception via the control channel and the service broadcasting reception. The base station (2) is provided with a reception identification memory (6) for registering the mobile station, and an incoming call control means (7) for controlling the incoming call from the general subscriber to the registered mobile station. A service broadcasting system characterized by that. 4. The service broadcasting system according to claim 1, 2 or 3, wherein at the end of the service broadcasting, the base station (2) gives a service broadcasting end notification via a control channel, and the mobile station (1) notifies the service broadcasting end. A service broadcasting system, characterized in that the setting of the call channel in the channel control means (5) is canceled and the state is returned to the localization state when the message is received.