JPH07321736A - Radio multiple address communication system - Google Patents

Abstract

PURPOSE:To allow a mobile station not taking participation in multiple address communication to take participation in the multiple address communication on the way. CONSTITUTION:Since the power is not applied to a mobile station 14, the station 14 does not take part in the multiple address communication. A base station 1 sends periodically a multiple address communication information notice signal to each mobile station in a radio zone 2. The multiple address communication information notice signal includes a mobile station group identification number G1 during multiple address communication and a multiple address communication channel CH1. When power is applied to the mobile station 14 and the communication is made available, the mobile station 14 receives the multiple address communication information notice signal sent from the base station. When the mobile station group identification number included in the received multiple address communication information notice signal belongs to the mobile station 14 and the mobile station 14 desires to take part in the multiple address communication, the mobile station 14 sends the multiple address communication participation request signal to a base station. The base station discriminates the allowance/reject of participation in the multiple address communication and when the participation is allowed, the base station sends the multiple address communication participation reply signal. The mobile station 14 selects the communication channel CH 1 included in the multiple address communication information notice signal to part in the multiple address communication.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless broadcast communication system, and more specifically, it performs broadcast communication between a master station and a plurality of slave stations existing within the wireless zone of the master station. The present invention relates to a wireless broadcast communication system.

[0002]

2. Description of the Related Art In recent years, with the progress of advanced information technology, mobile communication systems having excellent immediacy and functionality have attracted attention and have been used in various forms such as mobile phones and car phones. Wireless communication is becoming more important in realizing these mobile communications. In addition, in a wireless broadcast communication system, by grouping mobile station identification numbers, broadcast communication is performed between a base station and a mobile station group.

An example of a conventional broadcast communication system is disclosed in Japanese Patent Laid-Open No. 63-
It is disclosed in Japanese Patent No. 281529. In this conventional broadcast communication system, a plurality of mobile stations are present in the radio zone of the base station, and each mobile station has a configuration classified into one or more groups.

In the above conventional broadcast communication system, when the mobile station issues a broadcast communication start request to the mobile station, the mobile station transmits a broadcast start request signal including a group identification number to which the mobile station belongs to the base station. Upon receiving the broadcast start request signal, the base station sets a channel for broadcast communication and transmits a channel designation signal to the mobile stations belonging to the group identified by the group identification number. The mobile station that has received the channel designation signal shifts to the broadcast notification channel included in the channel designation signal. After that, the base station and the mobile stations belonging to the designated group carry out the broadcast communication by transmitting and receiving the broadcast data using the set broadcast communication channel. Further, the mobile station notifies the base station of the broadcast end request signal when the broadcast communication end request is generated. Upon receiving the broadcast end request signal, the base station transmits the broadcast communication end signal to the mobile stations participating in the broadcast communication, and ends the broadcast communication.

[0005]

However, in the above configuration, the target mobile station is powered off,
A mobile station that cannot switch to the channel used for broadcast communication at the start of broadcast communication, such as during a call with another party, cannot participate in the broadcast communication. Further, it is not possible to terminate the broadcast communication of only some mobile stations and continue the broadcast communication with the remaining mobile stations. Furthermore, when an incoming call is received by a mobile station that is broadcasting, it is impossible to respond to the incoming call.

Therefore, the conventional broadcast communication system has a problem in that the mobile station cannot obtain the necessary information or that the unnecessary communication unrelated to the mobile station must be continued. Also, when adding or deleting a part of mobile stations in the mobile station group of the broadcast communication partner, it is necessary to terminate the broadcast communication once and start the broadcast communication again. There was also the problem that it had to be done. further,
Until reconnection, it is difficult for a base station in an adjacent wireless zone to determine a free channel and use it for another communication, so that it is difficult to reliably secure a channel for broadcast communication.

Therefore, it is an object of the present invention to provide a wireless broadcast communication system in which a new slave station can participate in the broadcast communication while broadcasting between the master station and a plurality of slave stations.

Another object of the present invention is to provide a wireless broadcast communication system in which some slave stations can finish the broadcast communication during the broadcast communication between the master station and a plurality of slave stations. .

[0009]

The invention according to claim 1 is
A wireless broadcast communication system for performing broadcast communication between a master station and a plurality of slave stations existing in a wireless zone of the master station, each slave station being classified into one or more groups in advance, The master station includes a group identification number for identifying the group number of the slave station in the broadcast communication and specific information of the broadcast communication channel used for the broadcast communication, and notifies that the broadcast communication is in progress. The broadcast communication information notification means for transmitting the broadcast communication information notification signal to each slave station in the wireless zone is provided, and each slave station transmits the broadcast communication information notification signal including the group identification number corresponding to the group to which the slave station belongs. Upon receiving, a broadcast communication participation request signal for requesting participation in the broadcast communication is transmitted to the master station, and the master station further includes the group identification number in the broadcast communication information notification signal. Broadcast from slaves in the group identified by If the slave station that has received the broadcast participation request signal and has accepted the participation in the broadcast communication to the slave station that has transmitted the broadcast communication participation request signal, a broadcast communication participation response signal for notifying the participation in the broadcast communication, When each slave station further receives the broadcast communication participation response signal, the slave station transfers the reception channel to the broadcast communication channel included in the broadcast communication information notification signal. Channel transition means is provided.

The invention according to claim 2 is a wireless broadcast communication system for performing broadcast communication between a master station and a plurality of slave stations existing in a wireless zone of the master station, wherein the master station comprises: At the time of disconnection processing of communication with slave stations, a communication communication information notification signal that includes at least specific information of the broadcast communication channel used for broadcast communication and notifies that broadcast communication is in progress is disconnected. Each of the slave stations is provided with a broadcast communication information notification means for transmitting to the target slave station, and each slave station receives the broadcast communication information notification signal during the processing of disconnecting the communication with the master station, and notifies the receiving channel of the broadcast communication information notification signal. Channel switching means for switching to the broadcast communication channel included in the signal is provided.

The invention according to claim 3 is a wireless broadcast communication system for performing broadcast communication between a master station and a plurality of slave stations existing in a wireless zone of the master station, each slave station comprising: During the broadcast communication with the master station, the master station is equipped with a designated disconnection request means for transmitting to the master station a designated disconnection request signal that includes the slave station identification number for identifying the local station and requests termination of the broadcast communication of the local station. Upon receiving the designated disconnection request signal, the station performs a broadcast disconnection process with the slave station identified by the slave station identification number included in the designated disconnection request signal, and sends a designated disconnection completion signal to the slave station. When each slave station further receives the designated disconnection completion signal, it transmits a designated disconnection completion means for transmitting, and when the slave station receives the designated disconnection completion signal, a channel shift means for shifting the reception channel from the broadcast communication channel used for broadcast communication to another channel. Prepare

The invention according to claim 4 is a wireless broadcast communication system for performing broadcast communication between a master station and a plurality of slave stations existing in a wireless zone of the master station, wherein each slave station comprises: The master station is classified into one or more groups in advance, and the master station includes a slave station identification number for identifying slave stations in the slave station during broadcast communication with the slave station group, and a disconnection request signal for requesting termination of the broadcast communication. , A disconnection requesting means for transmitting to a slave station in the group, each slave station receives a disconnection request signal, and the slave station requested by the local station to end the broadcast communication by the received disconnection request signal. In some cases, the reception channel is switched from the broadcast communication channel used for broadcast communication to another channel, and a disconnection completion signal is sent to the master station to notify the completion of disconnection of the broadcast communication. Means are provided.

The invention according to claim 5 is a wireless broadcast communication system for performing broadcast communication between a master station and a plurality of slave stations existing in a wireless zone of the master station, wherein each slave station comprises: The master station is classified into one or more groups in advance, and when the master station receives an incoming call to any of the slave stations participating in the broadcast communication during the broadcast communication with the group of slave stations, the slave station that requested the incoming call Including a slave station identification number for identifying the slave station requested to receive the call, and a call-in information notification signal for notifying that there is an incoming call, using the broadcast communication channel used for the broadcast communication, The slave station is provided with the incoming call information notification means for transmitting to the slave stations in the group, and each slave station is a slave station that has received the incoming call information notification signal and has been requested to receive the incoming call information notification signal by the own station. In this case, the broadcast communication with the master station is terminated, and the slave station is identified in the incoming call information notification signal. It comprises incoming call responding means for executing an incoming call process between the slave designated as the incoming requests issue.

[0014]

In the invention according to claim 1, the master station transmits a broadcast communication information notification signal including a group identification number and a broadcast communication channel used for broadcast communication to each slave station in the wireless zone. To do. Upon receiving the broadcast communication information notification signal from the master station, each slave station of the corresponding group transmits a broadcast communication participation request signal. When the master station receives the broadcast communication participation request signal, the master station transmits a broadcast communication participation response signal to the slave station that has transmitted the received broadcast communication participation request signal. When the slave station transmitting the broadcast communication participation request signal receives the broadcast communication participation response signal, it shifts the receiving channel to the broadcast communication channel designated by the broadcast communication information notification signal and synchronizes with the master station. Join the newsletter.

In the invention according to claim 2, during the disconnection processing of the communication between the master station and the slave station, the master station notifies the broadcast communication information including the broadcast communication channel used for the broadcast communication. The signal is transmitted to the slave station whose communication is to be disconnected. When the slave station targeted for communication disconnection receives the broadcast communication information notification and completes the communication disconnection processing with the master station, it shifts to the broadcast communication channel specified by the broadcast communication information notification signal and communicates with the master station. Participate in the broadcast of.

In the invention according to claim 3, the slave station transmits a designated disconnection request signal including the slave station identification number during the broadcast communication. When the master station receives the designated disconnection request signal, the master station executes the broadcast communication disconnection process of the slave station corresponding to the slave station identification number designated by the designated disconnection request signal, and continues the broadcast communication with other slave stations.

In the invention according to claim 4, during the broadcast communication, the master station transmits a disconnection request signal including the slave station identification number. The slave station receives the disconnection request signal and, when the self station is designated as the target of the disconnection request, executes the disconnection processing of the broadcast communication. On the other hand, the broadcast communication between the slave station and the master station that are not designated as the disconnection target continues.

In the invention according to claim 5, when the master station receives an incoming call to a slave station participating in the broadcast communication during the broadcast communication, the broadcast communication used in the broadcast communication is received. An incoming call information notification signal including a slave station identification number that identifies the slave station that requested the call and the slave station that requested the call is transmitted using the use channel. When the slave station receives the incoming call information notification signal and the local station corresponds to the slave station identification number requested by the incoming call information notification signal, the slave station ends the broadcast communication and requests the incoming call information notification signal. The incoming call process with the slave station corresponding to the slave station identification number is executed.

[0019]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a wireless broadcast communication system common to first to fifth embodiments of the present invention described later. In FIG. 1, for example, nine mobile stations 11 to 19 are arranged in the wireless zone 2 of the base station 1. The mobile stations 11 to 14 belong to the group 10,
Mobile stations 15 to 16 belong to group 20, and mobile stations 17 to
19 belongs to the group 30. Also, the mobile stations 11 to 11
PS1 to PS9 are assigned to mobile station identification numbers 19 and G1 to G3 are assigned to mobile station groups 10 to 30 as mobile station group identification numbers. The base station 1 is connected to the communication network 3 via a transmission line. As the communication network 3, a telephone network, an ISDN (Integrated Service Digital Network), a wireless line, or another communication line is used. In this embodiment, the base station 1 and the wireless zone 2
For communication with each of the mobile stations 11 to 19 in the
Digital communication using DMA is adopted.

FIG. 2 is a block diagram showing an example of the configuration of the base station shown in FIG. In FIG. 2, the base station includes an antenna 201, a radio control unit 202, and a communication control unit 203.
A modulation unit 204, a demodulation unit 205, and an input unit 206.
And an output unit 207 and a line control unit 208. The radio control unit 202 has a function of transmitting the modulated data given from the modulation unit 204 on a carrier wave and transmitting from the antenna 201, and a function of receiving a signal in a predetermined frequency band from the high frequency signals induced in the antenna 201. . The communication control unit 203 includes a CPU, a ROM, a RAM, etc.,
The communication state of the base station is controlled according to a sequence diagram (see FIGS. 4 to 8) described later. The modulation unit 204 modulates the transmission data output from the communication control unit 203 by a predetermined method (for example, quadrature phase modulation), and outputs the transmission data to the wireless control unit 202. The demodulation unit 205 demodulates the signal received by the wireless control unit 202 and gives it to the communication control unit 203. The input unit 206 includes a keyboard, a microphone, and the like, and inputs data and voice to the communication control unit 203. The output unit 207 includes a magnetic disk device, a display device, a speaker, and the like, and the communication control unit 20.
The data output from 3 is stored, displayed, and output as voice. The line control unit 208 includes the communication network 3 and the communication control unit 203.
It is connected to and and controls the connection status and switching of the line.
The radio control unit 202 switches its communication channel in response to a channel switching instruction given from the communication control unit 203, and also transmits a transmission mode and a reception mode in response to a transmission / reception switching instruction given from the communication control unit 203. And can be switched.

FIG. 3 is a block diagram showing an example of the configuration of each mobile station shown in FIG. In FIG. 3, the mobile station includes an antenna 301, a radio control unit 302, and a communication control unit 30.
3, a modulator 304, a demodulator 305, and an input unit 306.
And an output unit 307. Radio controller 302
Is a function of transmitting the modulated data provided from the modulator 304 on a carrier wave and transmitting from the antenna 301.
01 has a function of receiving a signal in a predetermined frequency band from the high-frequency signal induced in 01. The communication control unit 303 is C
The communication state of the mobile station is controlled according to a sequence diagram (see FIGS. 4 to 8) including a PU, a ROM, a RAM, etc., which will be described later. The modulation unit 304 modulates the transmission data output from the communication control unit 303 by a predetermined method (for example, quadrature phase modulation), and outputs the transmission data to the radio control unit 302. Demodulation unit 305
Is demodulates the signal received by the radio control unit 302 and gives it to the communication control unit 303. The input unit 306 inputs data and voice to the communication control unit 303. Output unit 307
Stores the data output from the communication control unit 303,
Display, voice output, etc. The wireless control unit 302 switches its communication channel in response to a channel switching instruction given from the communication control unit 303, and also transmits a transmission mode and a reception mode in response to a transmission / reception switching instruction given from the communication control unit 303. And can be switched.

(First Embodiment) FIG. 4 is a sequence diagram showing a halfway broadcast communication participation process in the wireless broadcast communication system according to the first embodiment of the present invention. Hereinafter, with reference to FIG. 4, the halfway participation operation of the broadcast communication in the wireless broadcast communication system of the first embodiment will be described. In the following description, for the sake of convenience, the case where the broadcast communication is performed to the mobile stations of the group 10 is performed. However, when the broadcast communication is performed to the mobile stations of the other groups, the same operation as described below is performed. It is pointed out in advance that this will be done.

Now, it is assumed that the broadcast communication is being executed between the base station 1 and the mobile station group 10 using a communication channel (for example, CH1). However, since the mobile station 14 is powered off, it does not participate in the broadcast communication.

First, the base station 1 periodically transmits a broadcast communication information notification signal to each mobile station in the wireless zone 2 using the broadcast channel. The broadcast communication information notification signal includes the mobile station group identification number G1 that is being broadcast, and the communication channel CH1 that is performing the broadcast communication. The broadcast channel is a channel that can be received by all mobile stations in the wireless zone 2.

When the mobile station 14 is powered on and is ready for communication, the mobile station 14 receives a broadcast communication information notification signal which is periodically transmitted by the base station 1 using a broadcast channel. In response, the mobile station 14 extracts the mobile station group identification number G1 from the received broadcast communication information notification signal and determines whether the group 10 identified by the mobile station group identification number G1 belongs to the own station. Determine whether When the group 10 is not the group to which the own station belongs, the mobile station 14 continues to receive the signal of the broadcast channel. When the group 10 is a group to which the own station belongs and wants to participate in the broadcast communication, the mobile station 14 transmits a broadcast communication participation request to the base station 1. The broadcast participation request signal is a mobile station identification number PS4.
And a mobile station group identification number G1.

Next, the base station 1 receives the broadcast communication participation request signal transmitted from the mobile station 14, extracts the mobile station identification number PS4 included in the broadcast communication participation request signal,
It is determined whether or not the participation in the broadcast communication is permitted, and when the participation in the broadcast communication is permitted, the broadcast communication participation response signal is transmitted and the mobile station 14 is added as the mobile station of the broadcast communication partner. The broadcast participation response signal includes a mobile station group identification number G1 and a mobile station identification number PS4.

Finally, the mobile station 14 receives the broadcast communication participation response signal transmitted from the base station 1, shifts to the communication channel CH1 included in the broadcast communication information notification signal, and changes the communication channel CH1. It receives the signal from the base station 1 by using it and participates in the broadcast communication.

(Second Embodiment) FIG. 5 is a sequence diagram showing a broadcast communication halfway participation process in a wireless broadcast communication system according to a second embodiment of the present invention. Hereinafter, with reference to FIG. 5, a halfway participation operation of the broadcast communication in the wireless broadcast communication system of the second embodiment will be described.

Now, it is assumed that the broadcast communication is being executed between the base station 1 and the mobile station group 10 using the communication channel (for example, CH1). However, the mobile station 14 is communicating with another station connected to the communication network 3 using an external line and a communication channel (for example, CH2) and does not participate in the broadcast communication.

First, the communication between the mobile station 14 and the outside line is completed, and the mobile station 14 transmits a disconnection request signal to the base station 1.
Next, the base station 1 receives the disconnection request signal from the mobile station 14, determines whether or not the mobile station to be disconnected belongs to the mobile station group in the broadcast communication. The information notification signal is transmitted to the mobile station 14. The broadcast communication information notification signal is a mobile station group identification number G1 being broadcast.
And a communication channel CH1 for performing broadcast communication.

Next, the mobile station 14 receives the broadcast communication information notification signal transmitted from the base station 1, extracts the mobile station group identification number G1 included in the broadcast communication information notification signal, and broadcasts it. It is determined whether or not to participate in the communication, and when it is desired to participate in the broadcast communication, a broadcast communication participation request is transmitted to the base station 1. The base station 1 receives the broadcast communication participation request signal transmitted from the mobile station 14, adds the mobile station 14 as a mobile station of the broadcast communication partner, and executes the communication disconnection process performed on the communication channel CH2. Then, the disconnection completion signal is transmitted to the mobile station 14.

Finally, the mobile station 14 receives the disconnection completion signal from the base station 1, shifts to the communication channel CH1 included in the broadcast communication information notification signal, and communicates with the communication channel CH1.
To receive the signal from the base station 1 and participate in the broadcast communication.

(Third Embodiment) FIG. 6 is a sequence diagram showing a broadcast communication mid-end process in a wireless broadcast communication system according to a third embodiment of the present invention. Hereinafter, with reference to FIG. 6, a broadcast communication halfway end operation in the wireless broadcast communication system of the third embodiment will be described.

Now, it is assumed that the broadcast communication is being executed between the base station 1 and the mobile station group 10 using the communication channel (for example, CH1). That is, the mobile stations 11 to 1
4 participates in the broadcast communication.

First, the mobile station 14 transmits a designated disconnection request signal to the base station 1 when it desires to end the broadcast communication of its own station. The designated disconnection request signal includes the mobile station identification number PS4 desired to be terminated from the broadcast communication. Next, the base station 1 receives the designated disconnection request signal transmitted by the mobile station 14, and receives the mobile station identification number P included in the designated disconnection request signal.
When S4 is taken out, it is determined whether or not the end from the broadcast communication is permitted, and when the end from the broadcast communication is permitted,
The disconnection process of the mobile station 14 is executed, and the specified disconnection completion signal is transmitted to the mobile station 14. The designated disconnection completion signal includes the mobile station identification number PS4.

Finally, the mobile station 14 receives the designated disconnection completion signal and terminates the broadcast communication with the base station 1. The other mobile stations 11 to 13 participating in the broadcast communication continue the broadcast communication.

(Fourth Embodiment) FIG. 7 is a sequence diagram showing a broadcast communication mid-end process in a wireless broadcast communication system according to a fourth embodiment of the present invention. Hereinafter, with reference to FIG. 7, a broadcast communication halfway ending operation in the wireless broadcast communication system of the fourth embodiment will be described.

Now, it is assumed that the broadcast communication is being executed between the base station 1 and the mobile station group 10 using a communication channel (for example, CH1). That is, the mobile stations 11 to 1
4 participates in the broadcast communication.

First, when the base station 1 desires to end the broadcast communication of a non-designated mobile station (for example, other than PS1 and PS2), the mobile stations 11 to 14 using the communication channel CH1 of the broadcast communication. An undesignated disconnection request signal is transmitted to. The non-designated disconnection request signal includes mobile station identification numbers PS1 and PS2 which are desired to continue the broadcast communication.

The mobile stations 11 to 14 receive the non-designated disconnection request signal transmitted from the base station 1, retrieve the mobile station identification numbers PS1 and PS2 included in the non-designated disconnection request signal, and retrieve the mobile station. It is determined whether or not the identification number includes the mobile station identification number of the own station. If the retrieved mobile station identification number does not include your own mobile station identification number,
That is, in the case of the mobile station 13 or 14, the mobile station 13
Alternatively, 14 indicates a non-designated disconnection completion signal on the communication channel CH.
1 to the base station 1. The undesignated disconnection completion signal includes the mobile station identification number PS3 or PS4 of its own station. After that, the mobile station 13 or 14 shifts the used channel from the channel CH1 to another channel (for example, a broadcast channel) and ends the broadcast communication. It should be noted that the non-designated disconnection completion signal may be transmitted to the base station 1 on the broadcast channel after channel switching is performed.

The base station 1 receives the undesignated disconnection completion signal transmitted from the mobile station 13 or 14, and the mobile station having the mobile station identification number included in the undesignated disconnection completion signal, that is, the mobile station 13 or 14 End communication with. The mobile station 1
Between 1 and 12, the broadcast communication still continues.

(Fifth Embodiment) FIG. 8 is a sequence diagram showing mid-broadcast communication incoming call processing in a wireless broadcast communication system according to a fifth embodiment of the present invention. Hereinafter, with reference to FIG. 8, the mid-broadcast communication call-in operation in the wireless broadcast communication system according to the fifth embodiment will be described.

Now, it is assumed that the broadcast communication is being executed between the base station 1 and the mobile station group 10 using the communication channel (for example, CH1). That is, the mobile stations 11 to 1
4 participates in the broadcast communication.

First, the mobile station 15 transmits a call request signal for requesting the start of communication with the mobile station 14 to the base station 1 using the broadcast channel. The call request signal includes the mobile station identification number PS5 of the mobile station 15 that requested the start of communication and the mobile station identification number PS4 of the mobile station 14 that was requested as the communication partner. The broadcast channel is a channel that can be received by all mobile stations in the wireless zone 2.

Next, the base station 1 receives the call request signal from the mobile station 15, determines whether or not the mobile station of the communication partner belongs to the mobile station group in the broadcast communication. , The incoming call information notification signal is transmitted using the communication channel CH1 performing the broadcast communication. The incoming call information notification signal is
It includes the mobile station identification number PS4 that requested the call and the mobile station identification number PS5 that requested the call.

Next, the mobile stations 11 to 14 receive the incoming call information notification signal transmitted from the base station 1, and the incoming call requested mobile station identification number PS4 included in the incoming call information notification signal.
And determines whether or not the extracted mobile station identification number and the mobile station identification number of its own station match. When the extracted mobile station identification number matches the mobile station identification number of its own station, that is, in the case of the mobile station 14, the mobile station 14 transmits an incoming call response signal to the base station 1, The end processing of the broadcast communication of is executed. The incoming call response signal includes the mobile station identification number PS4 of its own station.

The base station 1 receives the incoming call response signal transmitted from the mobile station 14 and ends the communication with the mobile station having the mobile station identification number included in the incoming call response signal, that is, the mobile station 14. To do. Note that the broadcast communication is still continued with the mobile stations 11 to 13. Finally, mobile station 14 and mobile station 1
5 uses the broadcast channel to execute the arrival and departure processing of communication via the base station 1.

Although some embodiments of the present invention have been described above, it goes without saying that the present invention is not limited to the technical contents of the above embodiments. That is, the following is also included in the present invention.

In the first embodiment, the halfway participation process of the broadcast communication is executed for the mobile station whose power is changed from the OFF state to the ON state. However, the present invention is not limited to this, and for example, The halfway participation process of the broadcast communication may be executed for the mobile station that has moved into the wireless zone 2 from outside the wireless zone 2 of the base station 1. Also, the base station 1
In response to the broadcast communication participation request signal received from the mobile station, may transmit a signal for refusing participation in the broadcast communication. Further, the mobile station group identification number may not be provided in the broadcast communication information notification signal, and all mobile stations in the wireless zone 2 may be targeted for broadcast communication. Furthermore, although the base station 1 transmits the broadcast communication information notification signal at regular intervals, the transmission interval, the number of times of transmission, etc. may be freely designated.

In the second embodiment, the mobile station group identification number is included in the broadcast communication information notification signal. However, when the mobile station is performing one-to-one communication with the base station 1, the broadcast communication channel is used. You may make it include only the notification of transfer to. Further, in the second embodiment, the halfway participation process of the broadcast communication is executed for the mobile station which is performing the outside line communication with the other station connected to the communication network 3. However, the present invention is not limited to this. However, the broadcast is not limited to, for example, a mobile station performing extension communication with another mobile station in the wireless zone 2 or a mobile station performing one-to-one communication with the base station 1. You may make it perform mid-communication processing. Although the mobile station transmits the disconnection request, the base station may request disconnection. In that case, the base station 1 transmits a broadcast communication information notification signal including a disconnection request, the mobile station transmits a broadcast communication participation request,
The base station 1 may transmit a broadcast communication participation response signal instead of the completion of disconnection.

In the first and second embodiments,
When the mobile station that has received the broadcast communication information notification signal does not want to participate in the broadcast communication, it may transmit a broadcast communication participation refusal signal instead of the broadcast communication participation request signal.

In the third embodiment, the base station 1 that receives the designated disconnection request unconditionally executes the termination process of the broadcast communication to the corresponding mobile station.
Can reject the disconnect request.

In the fourth embodiment, the mobile station which receives the undesignated disconnection request unconditionally executes the termination process of the broadcast communication, but the mobile station can reject the disconnection request. Is. Further, in the fourth embodiment, the base station self-desired wants to end the broadcast communication to the undesignated mobile station, but the base station 1 requests from another station connected to the communication network 3. Therefore, a disconnection request may be issued to a mobile station that is not designated. Further, the base station 1 may specify the mobile station that ends the broadcast communication instead of specifying the mobile station that continues the broadcast communication.

In the fifth embodiment, when the mobile station receiving the incoming call information notification signal makes an incoming call, the incoming call response signal is sent using the communication channel currently used for the broadcast communication. However, the incoming call response signal may be transmitted to the base station 1 using the broadcast channel. Further, when the mobile station does not desire an incoming call response, it can also send an incoming call rejection signal instead of the incoming call response signal. Further, although the mobile station in the wireless zone 2 makes a call, the present invention is not limited to this and may be a case where another station connected to the communication network 3 makes a call.

In each of the above embodiments, the base station or the mobile station may be set to be able to transmit and receive each signal a plurality of times, and the number of times transmission and reception can be performed within a fixed time may be limited by a timer process. . Further, in each of the above-described embodiments, the wireless broadcast communication system for performing broadcast communication between the base station and a plurality of mobile stations has been shown, but the present invention is not limited to this, and the main station (mobile station) is widely used. It is applicable to a wireless broadcast communication system for performing broadcast communication between a slave station (including both stationary type and stationary type) and a plurality of slave stations (including both mobile type and stationary type).

[0056]

According to the first aspect of the present invention, the master station notifies each slave station in the wireless zone of the broadcast communication channel and the group identification number, and the corresponding slave station is notified to the notified broadcast communication channel. Since the shift is made, the slave stations that belong to the slave station group during the broadcast communication but cannot participate in the broadcast communication for some reason can join the broadcast communication from the middle. Therefore, a slave station that cannot switch to the channel used for broadcast communication, such as the target slave station powering off at the start of broadcast communication or being located outside the main station's wireless zone, joins the broadcast communication from the middle. This makes it possible to reduce mistakes in obtaining necessary information and perform more reliable broadcast communication.

According to the second aspect of the present invention, when the communication between the master station and the slave station is disconnected, the master station notifies the slave station of the other party of disconnection of the broadcast communication channel being broadcast, and the slave station notifies. Since the target slave station is communicating at the start of the broadcast communication, the mobile station that cannot switch to the channel used for broadcast communication starts the broadcast communication from the middle. It becomes possible to participate in, reduce mistakes in obtaining necessary information, and perform more reliable broadcast communication.

According to the third aspect of the present invention, the slave station which wants to end the broadcast communication is designated and notified, and the disconnection process is performed to the notified slave station. Only the slave stations of the department can finish the broadcast communication, and other slave stations can continue the broadcast communication. Therefore, the slave station can receive only necessary information without performing unnecessary communication.

According to the invention of claim 4, during the broadcast communication,
The master station transmits a disconnection request signal including the slave station identification number, and the slave station receives the disconnection request signal and executes the disconnection processing of the broadcast communication when its own station is designated as the target of the disconnection request. As a result, only some slave stations can finish the broadcast communication during the broadcast communication, and the other slave stations can continue the broadcast communication. Therefore, the slave station can receive only necessary information without performing unnecessary communication.

According to the invention of claim 5, since the incoming call is notified to the slave station which is performing the broadcast communication, the slave station can end the broadcast communication and respond to the incoming call, which is important. Never miss a communication.

Further, according to the present invention, when a part of the slave stations belonging to the slave station group of the broadcast communication is to be added or deleted, extra work such as termination of broadcast communication and reconnection is required. Communication time can be shortened without the need to perform. Also,
Before reconnecting, the main station in the adjacent wireless zone will not be judged as an empty channel, so it will not be used for other communication, and it is possible to reliably secure the broadcast channel. it can.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a wireless broadcast communication system according to an embodiment of the present invention.

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

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

FIG. 4 is a sequence diagram showing processing of a broadcast communication halfway participation method in the first embodiment of the present invention.

FIG. 5 is a sequence diagram showing processing of a broadcast communication midway participation method in the second embodiment of the present invention.

FIG. 6 is a sequence diagram showing a process of a halfway participation method for broadcast communication according to the third embodiment of the present invention.

FIG. 7 is a sequence diagram showing processing of a broadcast communication mid-end method according to a fourth embodiment of the present invention.

FIG. 8 is a sequence diagram showing processing of a broadcast communication mid-end method in the fifth embodiment of the present invention.

[Explanation of symbols]

 1 ... Base station 2 ... Radio zone 3 ... Communication network 10, 20, 30 ... Mobile station group 1 11-19 ... Mobile station 201, 301 ... Antenna 202, 302 ... Radio control part 203, 303 ... Communication control part 204, 304 ... Modulation unit 205, 305 ... Demodulation unit 206, 306 ... Input unit 207, 307 ... Output unit 208 ... Line control unit

Claims (5)

[Claims] 1. A wireless broadcast communication system for performing broadcast communication between a master station and a plurality of slave stations existing in a wireless zone of the master station, each slave station having one or more groups in advance. The master station includes a group identification number for identifying a group number of the slave station in the broadcast communication and specific information of a broadcast communication channel used for the broadcast communication. The broadcast communication information notifying means for transmitting a broadcast communication information notification signal notifying that the slave station is in communication is provided to each slave station in the wireless zone. When receiving the broadcast communication information notification signal including a number, the broadcast communication participation request signal for requesting participation in the broadcast communication, a broadcast communication participation request means for transmitting to the main station, the main station, , Further in the broadcast information notification signal If the slave station which has received the broadcast communication participation request signal from the slave station in the group identified by the group identification number and has accepted the participation in the broadcast communication to the slave station which has transmitted the broadcast communication participation request signal, A broadcast communication participation response signal for notifying participation in communication is provided with a broadcast communication participation response means for transmitting to the slave station, each slave station further receiving the broadcast communication participation response signal, a reception channel, A wireless broadcast communication system, comprising: a channel transfer unit for transferring to a broadcast communication channel included in the broadcast communication information notification signal. 2. A wireless broadcast communication system for performing broadcast communication between a master station and a plurality of slave stations existing in a wireless zone of the master station, wherein the master station is connected to the slave station. At the time of disconnection processing of the communication, a broadcast communication information notification signal including at least specific information of the broadcast communication channel used for the broadcast communication and notifying that the broadcast communication is in progress is sent to the slave station whose communication is to be disconnected. Each of the slave stations receives the broadcast communication information notification signal during disconnection processing of communication with the master station, and sends a broadcast channel to the broadcast communication information notification means. A wireless broadcast communication system comprising a channel transfer means for transferring to a broadcast communication channel included in a signal. 3. A wireless broadcast communication system for performing broadcast communication between a master station and a plurality of slave stations existing in a wireless zone of the master station, each slave station communicating with the master station. During the broadcast communication, including a slave station identification number for identifying its own station, a designated disconnection request means for transmitting a designated disconnection request signal for requesting termination of the broadcast communication of the own station, to the main station, the master station, When the specified disconnection request signal is received, the disconnection process of the broadcast communication with the slave station identified by the slave station identification number included in the specified disconnection request signal is executed, and the specified disconnection completion signal is transmitted to the slave station. When the slave station further receives the designated disconnection completion signal, each slave station shifts the reception channel from the broadcast communication channel used for the broadcast communication to another channel. Wireless broadcast system Beam. 4. A wireless broadcast communication system for performing broadcast communication between a master station and a plurality of slave stations existing in a wireless zone of the master station, each slave station having one or more groups in advance. The master station includes a slave station identification number for identifying slave stations in the group during broadcast communication with the group of slave stations, and a disconnection request signal requesting termination of the broadcast communication, Disconnection request means for transmitting to the slave stations in the group, each slave station is a slave station that has received the disconnection request signal and has been requested by the local station to end broadcast communication by the received disconnection request signal. In this case, the reception channel is switched from the broadcast communication channel used for broadcast communication to another channel, and a disconnection completion signal for notifying completion of disconnection of the broadcast communication is transmitted to the main station. Wireless with means Broadcast system. 5. A wireless broadcast communication system for performing broadcast communication between a master station and a plurality of slave stations existing in a wireless zone of the master station, each slave station having one or more groups in advance. When the master station receives an incoming call to any of the slave stations participating in the broadcast communication during the broadcast communication with the group of the slave stations, the master station receives the incoming call request to the slave station. An incoming call information notification signal that includes the slave station identification number that identifies the requested slave station and notifies that there is an incoming call is sent within the group using the broadcast communication channel used for the broadcast communication. In the case where each of the slave stations receives the incoming call information notification signal and is a slave station requested to receive an incoming call by the received incoming call information notification signal. , The broadcast communication with the main station is completed, and the incoming call information notification signal is being sent. Comprises incoming call responding means for executing an incoming call process between the slave designated as the call requested by the slave station identification number, the radio broadcast system.