JPH01154637A - Setting system for speech monitor function - Google Patents

Abstract

PURPOSE:To prevent a group A from listening to undesired communication by connecting a speech channel used by the talking in a group B to a monitor request radio equipment when a monitor request of the speech of the group B is received from a radio equipment of the group A. CONSTITUTION:When a speech monitor request comes from a radio equipment 1-1-1-1 belonging to the group A to the group B, a central controller 4 specifies a channel (f1) during speech in the group B and instructs reception of the channel f1 to the radio equipment 1-1-1-1. Thus, the radio equipment 1-1-1-1 transfers to the channel f1 and monitors the channel repeater 3 afterward.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a mobile communication system, and in particular, a method in which a plurality of radio devices communicate with each other via a radio base station relay device according to the allocation and release of communication channels by a central control device. The present invention relates to a setting method for a call monitor function in a mobile communication system that performs.

(Prior Art) The MCC system is a system in which a plurality of wireless devices perform group calls via a wireless base station relay device in accordance with a call channel allocation and cancellation instruction from a central controller.

In this system, there are two types of group call modes: intra-group call and intra-group call.

FIG. 1 is a diagram explaining such a conventional call mode, in which 50 represents a group, 51 to 53 are each a group, and 54, 55 are each a group 52.
53.

In the same figure, in the case of intra-group communication mode, one communication channel is given to all radios in the group indicated by 50, and in the case of intra-group communication mode, one communication channel is given to all the radios in the group 50.
1 for radios belonging to a specific group among ~56
A speech channel is provided.

(Problems to be Solved by the Invention) In the conventional system as described above, the intra-group call of, for example, group 51 shown in FIG. If you want to do so, you will inevitably have to make an intra-group call.
5 will also be given a communication channel.

In other words, the same channel is given to other radios that are not involved in the call, so the radio has the disadvantage of having to listen to unnecessary calls.

In view of these conventional problems, the present invention provides a means for monitoring calls between groups without calling an intra-group call, for example, as shown in FIG. 2, without using an intra-group call. , the purpose of this invention is to provide the wireless device 54 belonging to the group 52 with a means that enables it to monitor both calls of the group 51.

(Means for Solving the Problems) The features of the present invention for achieving the above object include a wireless device having a multi-channel access function, a wireless device installed within a service area to create a wireless zone, and a wireless device installed within a service area to create a wireless zone. a wireless base station relay device having a function of wirelessly connecting with said wireless device using a multi-channel access function, receiving radio waves from the wireless device, relaying and amplifying the radio waves, converting the frequency and transmitting the frequency to all the wireless devices; It is equipped with a central control unit that has the function of grasping the usage status of wireless base station relay equipment and managing the allocation and release of communication channels to a desired group of wireless devices in response to requests from wireless devices. intra-group calls, where there is a plurality of groups of radios in a zone, and a central controller provides a common communication channel to all the radios in the group;
In a mobile communication system configured to enable intra-group calls that provide a common communication channel to radios belonging to a specific group within a group of radios, the radios are not allowed to make intra-group calls of other groups. A call monitor comprising means for requesting monitoring, and means for providing the central control unit with a call reception channel used in an intra-group call of the other party's group when the central control unit receives a request from the radio set. It's in the function setting method.

That is, in the mobile communication system of the present invention, the wireless device is provided with means for requesting call monitoring of an intra-group call of another group, and when the central control unit receives the request from the wireless device, The conventional problems are solved by providing the radio with the call receiving channel used for intra-group calls of the other party.

(Example) FIG. 3 shows the configuration of a system according to an embodiment of the present invention.

1-e-m-n is a wireless device existing in wireless zone A and has a multi-channel access function. During a call, multiple wireless devices shift to a predetermined call channel according to the call channel designation from the central controller, and then switch to that call channel via the call channel relay device using the breathtalk method (two-frequency half-duplex). It has the ability to make group calls between users.

The group configuration of radios for group calls is as follows:
There are groups and groups, and all radio equipment is first classified into several groups based on business units, and then these groups are further divided into several groups based on work units, and based on these groups, A group call is made.

1 in l-11-a-n represents the group ID-No, m represents the group ID-No, and n represents the individual 1O-No. That is, the radio device 1-1-1-1 is a radio device with individual ID No. I that belongs to group 1.

1 is a control channel receiving device, which receives and demodulates the upstream control channel transmitted by the wireless device, and relays it to the central control device.

2-2 is a control channel transmitting device which modulates a control signal from the central control device and transmits it to the wireless devices in wireless zone A as a downlink control channel.

Reference numeral 3 denotes a communication channel relay device which receives and amplifies the upstream communication channel from the wireless device, performs frequency conversion, and transmits the upstream communication channel to the wireless devices in the wireless zone A as the downstream communication channel.

Reference numeral 4 denotes a central control unit, which manages the usage status of call channels, selects a channel to be allocated from among available call channels when a group call is requested, and assigns the call channel to desired radios participating in the group call. It has the function to specify.

FIG. 4 shows a control sequence of an embodiment of the present invention.

The call monitoring function of the present invention is performed as follows.

Wireless device 1-1-1-1, which belongs to group 1, group l, is using the call monitor function to make an intra-group call.Radio device 1-1-2-1.1-, which belongs to group 1, group 2. 1-2-
A case in which group call monitoring in step 2 is performed is shown below.

From the radio device 1-1-1-1, according to the signal format shown in FIG.
D2 group 1; group 1; individual 1, monitor destination ID 2 group 1;
A control signal representing group 2 is sent to the central controller 4 via the control channel receiver 1 using the control channel upstream.

From the received control signals, the central controller of group 1;
It recognizes that there is a call monitoring request for Group 1 and Group 2 from the radio with individual ID No. 1 belonging to Group 1, searches for the current status of Group 1 and Group 2, and searches for the current status of Group 1 and Group 2. After recognizing that a call is in progress and specifying the call channel fl being used, a message is sent via the control channel transmitting device 2-2 to the wireless device 1-1-1-1 that requested call monitoring. , in accordance with the signal format shown in FIG. 6, broadcasts to receive the corresponding communication channel fI.

Radio device 1-1-1-1 that received the control channel downlink,
In accordance with the notification, the communication channel f is shifted to reception, and thereafter, the intra-group communication of the wireless device 1-1-2-1.1-1-2-2 can be monitored via the communication channel relay device 3.

As a result, it becomes possible to monitor other desired group calls in response to requests from individual radios, without allowing unnecessary calls to be heard by other radios that are completely unrelated to the call.

(Effects of the Invention) As explained above, a plurality of wireless devices can communicate with each other according to the allocation and cancellation of communication channels by the central control unit. ! Regarding the method of making group calls via a base station relay device, the software of the central control unit and radio equipment has been improved, and transmission and reception between radio equipment belonging to the same group is repeated by turning the conventional BreathTalk button ON/OFF. In addition to the group call feature, other radios not involved in the call in any way may be provided with the right to transmit, but if the means to receive other desired group calls is provided upon request by the individual radio. This has the advantage that it is possible to monitor other group calls without having to listen to unnecessary calls.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the prior art, Fig. 2 is an explanatory diagram of the problem to be solved by the present invention, Fig. 3 is a diagram showing the system configuration of an embodiment of the present invention, and Fig. 4 is a diagram of the present invention. FIG. 5 is a diagram showing a control sequence of an embodiment of the invention, FIG. 5 is a diagram showing a call monitor request signal used in an embodiment of the invention, and FIG. 6 is a diagram showing a call monitor notification signal used in an embodiment of the invention. . l-1-1-n"・Group 1; Radio equipment belonging to group 1 (R position) 1-1-2□...Group 1; Radio equipment belonging to group 2 (R arrangement) 1- 2-1-n...Radio equipment belonging to Group 2 Nigelloop 1 (R location)

Claims (1)

[Claims] A wireless device having a multi-channel access function is installed within a service area to create a wireless zone, and wirelessly connects with the wireless device within this wireless zone using the multi-channel access function. receive radio waves from the machine,
A wireless base station relay device that has the function of repeating amplification, frequency conversion, and transmitting to all wireless devices, and grasping the usage status of the above wireless base station relay device and transmitting the desired wireless It is equipped with a central control unit that has the function of managing the allocation and release of communication channels to groups of aircraft, and when there are multiple groups of radios in the same wireless zone, the central control unit controls all of the groups in the group of radios. Mobile communications configured to enable intra-group calls that provide a common communication channel for radios, and intra-group calls that provide a common communication channel for radios belonging to a specific group within a group of radios. In this method, the wireless device is provided with a means for requesting monitoring of the intra-group call of another group, and when the central control unit receives a request from the wireless device, the wireless device is provided with a means for requesting the monitoring of the intra-group call of the other group. A setting method for a call monitor function, characterized in that a means for providing a call reception channel used in the call monitor function is provided.