JPH0897761A - Controlled communication system - Google Patents

Abstract

PURPOSE: To allow a general station in a different area to monitor a transmission content of a general station in other area by providing a transmission channel used to send a signal received by a direct communication area to a relay station and a transmission channel used to send the signal received from the relay station to the direct communication area to a control station. CONSTITUTION: A control station 1 uses a radio unit 6 to receive a transmission content of a general station 3 in a direct communication area as a direct wave 10 and the received signal is distributed by a control section 8. One of the branched signals is monitored by an operation section 9, the other is sent from a radio unit 7 as a relay wave 11 and sent to the general station 3 in a relay communication area 5. Thus, the transmission content of the general station 3 in the direct communication area 4 is monitored by the general station 3 in the relay communication area 5. Similarly the transmission content of the general station 3 in the direct communication area 5 is monitored by the general station 3 in the direct communication area 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for communicating directly from a control station to a plurality of general stations belonging to a communication area and a relay communication area, and between general stations.

[0002]

2. Description of the Related Art FIG. 1 shows a communication system in both communication areas. When controlling communication from the control station 1 (communication with a plurality of general stations 3 in the direct communication area 4 and the relay communication area 5), the channel frequency for the direct communication area 4 is used from one radio device in the control station 1. Communication is performed by using the channel frequency for the relay communication area 5 from another wireless unit. In this case, in the control station 1, since the radios for the direct communication area 4 and the relay communication area 5 are operating at the same time, transmission / reception with the general station is possible regardless of the area. The transmission contents of the general station can be received by another general station in the direct communication area 4 and the control station 1, but cannot be received by the general station in the relay communication area 5. On the contrary, the transmission contents of the general station in the relay communication area 5 cannot be directly received by the general station in the communication area 4. Therefore, the transmission contents of the general station may not be heard in some communication areas.

[0003]

As described above, when the control station directly communicates with a plurality of general stations in the direct communication area and the relay communication area, general stations in different areas cannot communicate with each other. It is an object of the present invention to enable communication between general stations in different areas during this simultaneous communication.

[0004]

In order to achieve the above object, the present invention provides a radio channel for direct communication of a control station when the control station simultaneously communicates with a plurality of general stations in a direct communication area and a relay communication area. The contents received by the relay communication wireless channel are transmitted, and the contents received by the relay communication wireless unit are directly transmitted by the wireless unit for communication.

[0005]

As a result, when the control station simultaneously communicates directly with a plurality of general stations in the communication area and the relay communication area, general stations in different areas can communicate with each other.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows the overall structure, and FIG. 2 shows the structure of the control station. The control station 1 receives the transmission content of the general station 3 in the direct communication area 4 as a direct wave 10 by the wireless unit 6,
The received signal is branched by the control unit 8. One of the branched signals is monitored by the operation unit 9, and the other signal is transmitted from the wireless unit 7 as a relay wave 11 to the general station 3 in the relay communication area 5. This enables the general station 3 in the relay communication area 5 to monitor the transmission content of the general station 3 in the direct communication area 4. Similarly, the transmission content of the general station 3 in the relay communication area 5 is changed to the general station 3 in the direct communication area 4.
Can also be monitored. Further, the content transmitted from the operation unit 9 is branched by the control unit 8, one is transmitted as the direct wave 10 from the wireless unit 6 and the other is transmitted as the relay wave 11 from the wireless unit 7, so that the direct area 4 It is possible to monitor the general stations 3 within and the general stations 3 within the relay area 5.

[0008]

According to the present invention, when the control station directly communicates with a plurality of general stations in the communication area and the relay communication area, the communication between the general stations and the communication between the control station and the general station can be performed by
Communication can be smooth because it can be monitored by all general stations.

[Brief description of drawings]

FIG. 1 is a system diagram showing an overall configuration of the present invention.

FIG. 2 is a block diagram showing an example of the configuration of a control station.

[Explanation of symbols]

 1 Control Station 2 Relay Station 3 General Station 4 Direct Area 5 Relay Area 6, 7 Radio Unit 8 Control Section 9 Operation Section 10 Direct Wave 11 Relay Wave

Claims (1)

[Claims] 1. A direct communication area for communicating between a control station and a plurality of general stations and between the general stations, and communication between the control station and a plurality of general stations via a relay station. In a communication system having a relay communication area for performing, the control station is provided with a transmission / reception channel used for the direct communication and a relay transmission / reception channel used between the relay station,
The control station includes a transmission channel for transmitting a signal received in the direct communication area to the relay station, and a transmission channel for transmitting a signal received from the relay station to the direct communication area. Controlled communication method.