JPH01154638A - Setting system for priority speech function - Google Patents

Abstract

PURPOSE:To allow an important user to attain instant speech even when no idle channel exists in a general speech channel by providing a priority speech channel used for priority speech only. CONSTITUTION:When speech is congested, there is no idle channel in a general speech channel and an in-group communication request comes from a radio equipment 1-1-1-1 belonging to the group 1, a central controller 4 recognizes the group 1 to be a radio equipment group capable of utilizing the priority speech and decides a priority speech channel (f1) to be assigned from the priority speech channel and informs it to a radio equipment belonging to the group 1 for the transfer to the channel f1. Since the radio equipment belonging to the group 1 transfers to the channel f1, speech is attained alternately by the press-to-talk system 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. This invention relates to a method for setting a priority call function in a mobile communication system.

(Prior Art) The MCΔ system is a system in which a plurality of wireless devices perform group calls via a wireless base station relay device according to call channel allocation and cancellation by a central control device.

In this system, there was no way to give a communication channel preferentially to a specific group of wireless devices, so
When calls are busy, no matter how urgently important users' wireless devices are, they will not be given a call channel until a free call channel becomes available. If there is no free communication channel, the system enters a waiting state until a free channel becomes available, which has the disadvantage that important users cannot communicate immediately.

(Problems to be Solved by the Invention) The purpose of the present invention is to improve the software of the central control unit and radio equipment, and to improve the software of the central control unit and radio equipment, as well as to improve the priority call channel used only for priority calls, in addition to the general call channel used for general communication. By providing a channel for priority calls, even when there is no free space in the general call channel, a group of important users' radios can be given priority when calls are busy. be able to talk on the phone,
That is, as shown in the flowchart of FIG. 2, if there is no free call channel, a priority call channel is allocated so that important users can communicate immediately.

(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 that has a function of wirelessly connecting with the 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; Equipped with a central control unit that has the function of grasping the usage status of base station relay equipment and managing the allocation and release of communication channels to a desired group of radio equipment in response to requests from radio equipment, A mobile communication system in which a group of multiple wireless devices coexists in a group, and in order to perform closed communication (group call) between the wireless devices within the group, it is possible to give the same communication channel only to the desired multiple wireless devices. In,
In addition to the general call channel used for general communication, by providing a priority call channel that is used only for priority calls, even when there is no free space in the general call channel, a certain specific By providing a means of giving priority calling channels to a fleet of radios,
There is a priority call function setting method that allows important users' wireless devices to have priority calls even when calls are busy.

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

1 (-m-0 is a radio that exists in wireless zone A and has a multi-channel access function. During a call, it shifts to a predetermined call channel according to the call channel designation from the central control unit. , has the function of making a group call between a plurality of wireless devices that have been transferred to the call channel using the breath talk method (two-frequency half-duplex communication) via a call channel relay device.

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 those groups are further divided into several groups based on work units, and group calls are made based on these groups. will be held.

1 of 1-1-m-n is group ID-No, m is group I
D-No., , n represent individual ID-No., respectively. That is, radio 1-+L+-+ is an individual 1O-No. 1 radio that belongs to group 1.

2-1 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.

3-1 is a general communication channel relay device, which receives and amplifies the communication channel upstream from the wireless device for general communication, performs frequency conversion, and transmits it to the wireless device in wireless zone A as the communication channel downlink. do.

3-2 is a channel relay device for priority calls, which receives and amplifies the communication channel upstream from the radio device, performs frequency conversion, and transmits it to the radio device in wireless zone A as the communication channel downlink. Send.

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.

In addition, the central control unit has an input device for specifying a priority call group, and when a group of radios that can perform priority calls is specified from this input device, when calls are congested and there is no free space in the general call channel, the When there is a call request from the corresponding radio set,
It has a function to give priority communication channels to the group of wireless devices.

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

The priority call according to the present invention is performed as follows.

A case in which a communication channel is preferentially given to radio device 1-1-m-n belonging to group 1 through priority communication will be described below.

From the input device for specifying the priority call group of the central control unit No. 4,
Group 1 is designated as a wireless device group that can use priority calls.

Let us consider a case where a request for an intra-group call is received from the wireless device 1-1-1-1 belonging to group 1 when calls are busy and there is no free space in the general call channel.

From the radio device 1-1-1-1, according to the signal format shown in FIG.
2nd group 1: A control signal representing group 1 is transmitted via the control channel receiving device 2-2 using the upstream control channel.
is sent to the central control unit.

From the received control signal, the central controller of Group 1;
It recognizes that an intra-group call has been made from a radio that belongs to group 1, and that group 1 is a group of radios that can use priority calls, and assigns a priority call channel f1 from among the priority call channels. After determining, the signal is transmitted to all radio devices existing within the wireless zone via the 2-2 control channel transmitter according to the signal format shown in FIG.
Applicable radio equipment belonging to group I1. -Hiroshi-1・1-1-1-
2.1-1-2-1.1-1-2-2, notification is made to shift to the corresponding priority communication channel f1.

Further, the central control device No. 4 transmits the priority call channel f to the priority call channel relay device No. 3-2.

Activate to relay the information.

Among all the wireless devices that received the control channel downlink, the wireless device 1-1-1-1.1-1-1-2.1-1 belonging to group 1 was ordered to shift to the priority communication channel f. -2-1
．． 1-1-2-2 is the priority communication channel f according to the notification.
, move to. After that, transmission and reception are repeated alternately between these four radios using the breath talk method, and 3-
A group call is made via the priority call channel relay device No. 2.

The priority communication channel relay device 3-2 is activated by the activation signal from the central control unit 4, receives and amplifies the communication channel uplink from the wireless device that has shifted to the priority communication channel f, and performs frequency conversion. and transmits it to the wireless device that has shifted to the priority communication channel f as the communication channel downlink.

This makes it possible to make priority calls, and by providing a means to give a priority call channel to a specific group of radios even when there is no free space on the general call channel, important users' radios can make calls. It is possible to make calls preferentially even during busy times.

(Effects of the Invention) As explained above, regarding a system in which a plurality of wireless devices perform group calls via a wireless base station solid line device according to call channel allocation and cancellation by the central control device, the central control device, the wireless device In addition to the general call channel used for general communication, we have also created a priority call channel that is used only for priority calls, so that even when there is no free space in the general call channel, the communication to the central control unit can be made. If a means is provided for giving a priority call channel to a certain group of wireless devices based on the input of , there is an advantage that the group of important users' wireless devices can be given preferential communication even when calls are busy.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the drawbacks of the prior art, FIG. 2 is a flowchart showing the problems 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. Figure 5 shows the control sequence of the embodiment of the present invention.
6 is a diagram showing an intra-group call origination request signal used in the embodiment of the present invention, and FIG. 6 is a diagram showing an intra-group call incoming call notification signal used in the embodiment of the present invention. 1-1-1-n"" group 1; radio equipment belonging to group l (R location) 1-1-2-n"' group 1; radio equipment belonging to group 2 (R location) 1- 2-1-n...Group 2; Radio equipment belonging to Group 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 wireless base station relay device and transmitting the desired wireless device according to the request from the wireless device. It is equipped with a central control unit that has the function of managing the allocation and release of communication channels to groups, and is equipped with a central control unit that has the function of managing the assignment and cancellation of communication channels to groups. ) to do
In a mobile communication system that makes it possible to give the same communication channel only to multiple desired radios, by providing a priority communication channel used only for priority communication in addition to the general communication channel used for general communication, By providing a means to give a priority communication channel to a specific group of radios through input to the central control unit even when there is no free space in the general communication channel, the radios of important users can be freed from call congestion. A setting method for a priority call function is characterized in that it enables calls to be made preferentially even at times.