JP2768116B2 - Outgoing call restriction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-zone simplified mobile radio telephone in which an integrated base station connected to a public telephone network provides a telephone service to a mobile telephone mounted on an automobile.
(ConvenienceRadio Phone: hereafter abbreviated as CRP) related to the system, especially when the service of the central base station is stopped for mobile stations under the control of the relay base station provided in the area where the radio waves for service of the central base station do not reach. Regarding outgoing call restrictions.
The large-zone CRP system requires a simpler base station configuration than the small-zone public car telephone system, so it can be deployed in local cities where the public car telephone system is not widespread. It is planned.

[0002]

2. Description of the Related Art In a conventional CRP system, as shown in FIG. 4, a base station 10 connected to a public network 50 simplifies a call service for the mobile station 30 under its control. The service area for 30 is divided into one so-called large zone without subdivision, and limited to the range (radius of 20 to 30 km) where radio waves for the service of the base station 10 can reach. I could not do it. However, the usage pattern of system subscribers in local cities could not be specified,
In order to provide call service to subscribers in mountainous areas where 10 radio waves do not reach, a relay base station (also referred to as a forward base station or satellite station) not shown in the figure is installed to provide subscriber convenience. It is desired to pursue. Although not shown, a general public car telephone system adopts a cell system in which an area of an appropriate size is subdivided into small service areas called cells and communicates.A base station is installed at the center of each cell and a plurality of cells are installed. A certain service area is secured by stacking cells. For this reason, a base station is required for each cell, and tracking exchange of advanced technology is required for connection between the cells. However, although the CRP system can provide services using a base station having a simple configuration, there are always areas where the transmission radio waves of the base station do not reach. In commercial wireless communication systems such as government offices and municipalities, a system has been introduced to provide relay base stations in those areas and rescue them. CR provided
The P system has not yet been introduced.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a conventional CRP system for public communication and a relay base station 20 in addition to the base station 10.
The present invention relates to a large-zone type CRP system provided with a relay zone, which has a service area of the relay base station 20 outside the service area of the control base station 10 connected to the public network 50. The CRP system provided with the relay base station 20, mobile 40 in the area managed by the relay base station 20, the operation state of the plurality of through talk channel against the mobile equipment 30 in the area of general base station 10 The relay base station 20 needs to be able to make a call without being aware of
The use status of the 10 communication channels needs to be automatically notified. Plurality of through talk channel that is to use the general base station 10
If a part of the network is in an operation stop state due to failure, maintenance, etc., the relay base station 20 automatically notifies the mobile station 40 under management of the operation stop state of the communication channel of the control base station 10, It is necessary to restrict outgoing calls on the communication channel during which operation of the control base station 10 is stopped. An object of the present invention is to realize a large zone type CRP system satisfying these requirements.

[0004]

FIG. 1 shows a basic configuration of the present invention for achieving this object. In the figure, 1 is a relay base station 20
Is a relay control device newly installed in the
Monitors the state of the communication channel provided to the mobile station 30 managed by the own station via a relay line that relays a communication signal with the control base station 10, and determines whether or not the communication channel is in use. And when the use of the communication channel is stopped,
This is for restricting the outgoing call on the communication channel of which the controlling base station 10 has stopped operating for the mobile device 40 managed by 20.

[0005]

According to the present invention, the relay control device 1 provided in the relay base station 20 changes the operation state of the communication channel given by the supervising base station 10 to the mobile station 30 managed by the relay base station 10 according to the communication signal. Is monitored through a relay line that relays the communication channel, and the operation state of each communication channel is determined. Then, control is performed to enable or disable transmission on a specific communication channel to the mobile device 40 managed by the relay base station 20. Then, the relay control device 1 constantly monitors the transmission wave of the communication channel being served by the central base station 10 to the mobile device 30 and determines that the operating communication channel has been stopped for some reason. When the detection is detected, the call control on all the mobile devices 40 managed by the relay base station 20 on the communication channel whose operation has been stopped earlier by the control base station 10 is restricted.

[0006]

FIG. 2 shows a configuration of a CRP system provided with a relay base station 20 in addition to the supervising base station 10 according to the embodiment of the present invention. FIG. 3 shows an example of the configuration of the relay control device 1 of the relay base station 20. Show. In FIG. 2, the serving base station 10 has one control channel and n
Immediately give a transceiver for call-channel #. 1 to # n, sends a control signal necessary for control channel radio frequency fc to the mobile station 30 in the service area of the own station 10 (home zone),
The communication service is provided on the communication channels of the radio frequencies f1 to fn. The relay base station 20 transmits a call signal of the radio frequency fc, f1 to fn to the mobile device 30 in the home zone of the control base station 10,
In order to use also for relaying to the mobile device 40 managed by the own relay base station 20, a transmission / reception device of a radio frequency fc, f1 to fn is provided as a relay facility for relaying a call signal with the control base station 10. cage, and the equipment to carry out the call of the mobile station 40 fc, f1 ~fn
A control channel of a different radio frequency fc ′ and a radio frequency f1
送 受 信 to fn 'are provided. Note that the control base station 10 continuously transmits transmission waves of all the communication channels of the radio frequencies f1 to fn, and the relay control device 1 of the relay base station 20 transmits the transmission channels of the communication channels of the radio frequencies f1 to fn. The carrier of the wave is monitored via the transmission / reception device of the relay equipment, and for the mobile device 40 in the service area of the own station 20, the transmission / reception device of another frequency fc ′, f1 ′ to fn ′
It controls and relays the signal of the communication channel of the control base station 10. Here, when the transmission wave of any one of the n communication channels # 1 to #n of the radio frequencies f1 to fn for the mobile device 30 in the home zone of the control base station 10 stops, the relay base station 20 The relay control device 1 detects that the carrier of the corresponding communication channel cannot be received, and
The transmission operation of the transmitting / receiving device of the radio frequencies f1 'to fn' to the corresponding device for 40 is stopped. If the relay control device 1 detects that the reception of all the carriers of the radio frequencies f1 to fn of the n communication channels of the control base station 10 cannot be performed, the relay control device 1 has a function of relaying the communication signal with the control base station 10. It is determined that all of the calls have been disconnected, and the mobile station 40 within the area of the relay base station 20 issues a transmission restriction signal for stopping the transmission of all n communication channels by the control channel of the radio frequency fc ′. Send out.
As a result, all mobile units 40 cannot make outgoing calls. Also,
N communication channels of radio frequencies f1 to fn of the control base station 10
If any one of # 1 to #n detects the reception of the carrier of the transmission wave, a transmission restriction release signal on the corresponding communication channel is transmitted to all the mobile devices 40, and the corresponding communication channel is transmitted. Allows outgoing calls. The relay control device 1 of the relay base station 20 shown in FIG. 3 controls the relay line that performs signal relay with the control base station 10 and the radio frequencies f1 ′ to fn ′ for all the mobile stations 40 in the service area of the own station 20. Control of the transmitting / receiving device. The carrier detection unit 11 of the relay control device 1 detects presence / absence of a carrier for each communication channel of the transmission / reception device for relaying to the control base station 10, and notifies the channel state determination unit 12. The channel state determination unit 12 determines the use state of each communication channel based on the notification, and notifies the signal transmission unit 13 of transmission restriction / release. The transmission restriction / cancellation signal transmission unit 13 causes the control channel transmission / reception device 14 to transmit a transmission restriction signal to all the mobile devices 40 within the service area of the own station 20 based on the notification. By this signal transmission, all the mobile devices 40 within the service area of the relay base station 20 cannot transmit on the communication channel. In addition, the start / stop of the transmission / reception devices of the communication channels # 1 ′ to #n ′ for the mobile device 40 of the relay control device 1 is performed by a state notification for each communication channel from the carrier detection unit 11 via the channel state determination unit 12. The relay control unit 15
Do. Here, when the carrier detection unit 11 detects the presence of a carrier in a certain communication channel of the relay line with the control base station 10, this is notified to the channel state determination unit 12, and the channel state determination unit 12 Determine the availability of the channel. Then, the transmission restriction / cancellation signal transmitting unit 13 is notified of the release of the transmission restriction. The transmission restriction / cancellation signal transmission unit 13
In response to this notification, a call release signal is sent to the control channel transmitting / receiving device 14 to all the mobile devices 40 managed by the own station 20, so that a call can be made on the corresponding communication channel.

[0007]

As described above, according to the present invention, a radio frequency for communication with a mobile station under the control of the supervising base station is shared for the relay line with the supervising base station of the superimposing base station. In addition, the relay base station can constantly monitor the communication channel held by the controlling base station, and can automatically notify the mobile station under the control of the own station whether or not the communication is possible. In addition, when a part of the service wave of the controlling base station is stopped, a part of the corresponding service wave of the relay base station is automatically stopped, so that the controlling base station is unaware of the state of the relay base station. In addition, the effect that the operation can be stopped for maintenance of the own station can be obtained.

[Brief description of the drawings]

FIG. 1 is a principle diagram showing a basic configuration of a transmission restriction system according to the present invention.

FIG. 2 is a CRP having a transmission restriction method according to an embodiment of the present invention.
System configuration diagram

FIG. 3 is a configuration diagram of a relay control device of a relay base station according to an embodiment of the present invention.

FIG. 4 is a configuration diagram of a conventional CRP system for public communication.

[Explanation of symbols]

10 is the controlling base station, 20 is the relay base station, 1 is the relay control device,
11 is a carrier detection unit, 12 is a channel state determination unit, 13 is a transmission restriction / release signal transmission unit, 14 is a control channel transceiver, 30 is a mobile station managed by the control base station 10, and 40 is a relay base station 20 Mobile device to manage.

Claims (2)

(57) [Claims] 1. A mobile device for managing the general base station of simplified mobile radio telephone system of a large zone system connected to the public network
Relay base station provided to the service to the mobile equipment of the areas where radio waves can not reach for the call service to the limits the call on a particular traffic channel to pair <br/> to the mobile device the managed originating in limiting mode, to the relay base station, comprising a relay control equipment for controlling a call of the mobile station under the control of its own station to monitor the operational state of the traffic channel to be held by the general base station, the relay base station relay control equipment of, when it detects the operation stop state by receiving a transmission radio wave of a plurality of speech channels in the operation of the general base station monitors, said relay base station to manage
A relay communication channel different from the communication channel of the controlling base station
Originating limiting scheme in simplified automatic's telephone system, characterized in that for the moving machine to restrict a call in its operational stopped traffic channel to use. Movement wherein <br/> relay control equipment in the relay base station in the originating limiting scheme monitors the operational state of the plurality of through talk channel who hold the general base station under management of its own station in controlling the call of the machine, operation stop and a co-transmit and receive signals of the same radio frequency as the trunk line for transmitting and receiving radio waves for communication service against the mobile unit its managed between the general base station calling restriction method of claim 1 wherein characterized that you detect the condition.