JP2894110B2 - Common signal control method and apparatus for satellite communication line - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a common signal control system for a satellite communication line, and more particularly to a communication system in which three or more satellite communication earth stations share two or more transmission paths in accordance with an instruction from a control station. The present invention relates to a common signal control method for a satellite communication line when a plurality of satellite communication devices are present in one satellite communication earth station using a request assignment satellite communication system for performing the above request and a device therefor.

[0002]

2. Description of the Related Art Generally, in a request assignment satellite communication system in which three or more satellite communication earth stations communicate by sharing two or more transmission lines, a common transmission line resource is managed and transmitted in response to a request. A common signal transmission path for transmitting transmission path allocation information between a control station to which a path is allocated and each earth station is required.

Conventionally, a plurality of three or more satellite communication earth stations use a request assignment satellite communication system in which a control station communicates by sharing two or more transmission paths. When a satellite communication device is present, a satellite communication earth station that is not a control station has a configuration as shown in FIG. Normally, a common signal transmitted from a control station via a satellite passes through an antenna 1, a low-noise amplifier 2, a reception frequency converter 3, a distribution unit 12 of a multicarrier control device 4, and a data communication signal transmission / reception device 6 '. -1, 6'-2 or the common signal processing unit 16 through the demodulation unit 14 of the voice communication signal transmitting / receiving apparatus 8'-1, 8'-2.

When a communication signal frequency is designated by a common signal from a control station, the common signal processing section 16 sends a frequency control signal to the data communication signal processing section 17 or the voice communication signal processing section 18 so that the frequency becomes the communication signal frequency. 101, and information for notifying that control has been performed.
To the modulation unit 15 and the synthesis unit 1 of the multicarrier control device 4
3. The data is passed to the control station via the transmission frequency converter 10, the high power amplifier 11, and the antenna 1, and thereafter, the data communication signal processing unit 17 and the data communication signal terminal devices 7-1 and 7-2 or the voice communication signal processing unit 18 Communication was performed by the voice communication signal terminal devices 9-1 and 9-2.

[0005] The data communication transceiver of the earth station has both a function of transmitting and receiving a common signal and a function of transmitting and receiving a data communication signal. In addition, the voice communication transmitting / receiving device also has both a function of transmitting / receiving a common signal and a function of transmitting / receiving a voice communication signal.

[0006]

SUMMARY OF THE INVENTION A data communication signal transmitting / receiving apparatus for a satellite communication earth station includes both a common signal processing unit for transmitting and receiving a common signal and a data communication signal processing unit for transmitting and receiving a data communication signal. It was very expensive. Further, since the configuration of the communication signal receiving section is very complicated, the information rate for receiving the common signal and the information rate for receiving the data communication signal have to be the same.
In other words, the common signal is a signal for the purpose of allocating the frequency for the data communication signal and monitoring the state of the device and informing the control station, so a low speed was sufficient,
Since the information speed of the data communication signal is high, the information speed of the common signal must be increased, which is disadvantageous in that it is expensive.

[0007] The voice communication signal transmitting / receiving device of the satellite communication earth station also has both a common signal processing unit and a voice communication signal processing unit similarly to the data communication signal transmitting / receiving device, and receives an information rate for receiving the common signal and a voice communication signal. There is a drawback in that the speed must be the same, and the cost becomes high.

An object of the present invention is to provide a common signal control method for a satellite communication line and a device therefor that can perform communication at a low cost with a simple configuration.

[0009]

In order to achieve the above object, a common signal control method for a satellite communication line according to the present invention comprises:
In a common signal control method for a satellite communication line using a request assignment satellite communication system in which three or more satellite communication earth stations communicate by sharing two or more transmission paths in accordance with an instruction from a control station, The configuration for transmitting and receiving data is made independent as a common signal transmitting and receiving device, and the status of both the data communication signal transmitting and receiving device for transmitting and receiving data communication signals and the voice communication signal transmitting and receiving device for transmitting and receiving voice communication signals is monitored by the common signal transmitting and receiving device. And by controlling the transmission and reception frequencies of the common signal transmission / reception device for data communication or voice signals, the status of the data communication signal transmission / reception device and the voice communication signal transmission / reception device can be controlled by one common signal transmission / reception device. The common signal transmission / reception device for data communication and the common signal transmission / reception device for voice communication are transmitted, and the common signal transmission / reception for data communication of the control station is performed. And performs frequency control to convey frequency communication signals assigned from location or voice communication common signal transmitting and receiving device to the data communication signal transmitting and receiving device or voice communication signals transmitting and receiving device.

Further, a control apparatus for implementing a common signal control method for a satellite communication line according to the present invention is characterized in that three or more satellite communication earth stations transmit two or more transmission paths according to an instruction from the control station. A request communication for sharing and communicating a satellite communication line having a common signal transmitting / receiving device, a data communication signal transmitting / receiving device, a voice communication signal transmitting / receiving device, and a multicarrier control device for a satellite communication earth station using a satellite communication system. A common signal transmission / reception device, wherein the common signal transmission / reception device receives the common signal from the control station, receives the common signal, processes the received common signal, and processes the common signal. The control station has a common signal transmitting means in the control station, and a frequency selecting means for determining whether the frequency of the common signal is to be selected for data communication or voice communication by the logic unit. A data communication signal transmitting and receiving device, a data communication signal receiving means for receiving data communication with another satellite communication earth station at a frequency designated by a logic unit of the common signal transmitting and receiving device, And a data communication signal transmitting means for transmitting the data communication signal processed by the data communication signal processing means to another satellite communication earth station. Voice communication signal receiving means for receiving voice communication with another satellite communication earth station at a frequency designated by the logic unit of the common signal transmitting / receiving device, and voice communication signal processing means for processing the received voice communication signal; A voice communication signal transmitting means for transmitting a voice communication signal processed by the voice communication signal processing means to another satellite communication earth station. The control device includes a common signal transmitting / receiving device, a plurality of data communication signal transmitting / receiving devices, and a receiving communication signal distribution unit that distributes a receiving communication signal to the plurality of voice communication signal transmitting / receiving devices, a common signal transmitting / receiving device, and a plurality of data communication signal transmitting / receiving devices. And transmission communication signal combining means for combining transmission communication signals from a plurality of voice communication signal transmission / reception devices.

[0011]

The common signal transmitting / receiving device connected to the multicarrier control device is a data communication signal transmitting / receiving device.
6-2 and the status of the audio communication signal transmitting and receiving devices 8-1 and 8-2 are monitored and controlled via the monitoring control cable 20 connected to the logic unit 19, and the common signal transmitting and receiving device 5 is controlled.
The logic unit 19 selects the frequency of the common signal for data communication or voice communication, and uses this frequency to transmit a common signal to the common signal transmitting / receiving device for data communication or the common signal transmitting / receiving device for voice communication of the control station via the satellite. Send

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, a common signal control method for a satellite communication line according to the present invention is such that a plurality of three or more satellite communication earth stations share two or more transmission paths in response to an instruction from a control station. The request allocation is performed using a satellite communication system. The common signal transmission / reception device 5, the data communication signal transmission / reception devices 6-1 and 6-2, and the voice communication signal transmission / reception device 8-
1, 8-2 and the multicarrier control device 4.

The common signal transmitting / receiving device 5 includes a demodulation unit 14 as a common signal receiving means for receiving a common signal from a control station.
And a common signal processing unit 16 for processing the received common signal.
And a modulating unit 15 as a common signal transmitting means for transmitting a common signal processed by the common signal processing unit 16 to the control station, and a logic unit 19. The logic unit 19 changes the frequency of the common signal to data communication and voice. It has a frequency selection function to determine which one to use for communication.

Data communication signal transmission / reception devices 6-1 and 6-2
Is a demodulation unit 14 for receiving data communication with another satellite communication earth station at a frequency designated by the logic unit 19 of the common signal transmitting / receiving device 5 and a processing of the received data communication signal. Data communication signal processing unit 1 to be performed
7 and a demodulation unit 15 as data communication signal transmitting means for transmitting the data communication signal processed by the data communication signal processing unit 17 to another satellite communication earth station.

Voice communication signal transmission / reception devices 8-1 and 8-2
Is a demodulation unit 14 as a voice communication signal receiving means for receiving voice communication with another satellite communication earth station at a frequency designated by the logic unit 19 of the common signal transmitting / receiving device 5, and processing of the received voice communication signal. Voice communication signal processing unit 18 that performs
And a modulating unit 15 as a voice communication signal transmitting means for transmitting the voice communication signal processed by the voice communication signal processing unit 18 to another satellite communication earth station.

The multicarrier control device 4 includes a common signal transmitting / receiving device 5 and a plurality of data communication signal transmitting / receiving devices 6.
1, 6-2 and a plurality of voice communication signal transmitting / receiving devices 8-1,
8-2, a distributing unit 12 as a receiving communication signal distributing unit for distributing the receiving communication signal, a common signal transmitting / receiving device 5, a plurality of data communication signal transmitting / receiving devices 6-1, 6-2, and a plurality of voice communication signal transmitting / receiving devices Combining section 1 as transmission communication signal combining means for combining transmission communication signals from 8-1 and 8-2.
And 3.

1 is an antenna, 2 is a low noise amplifier,
3 is a reception frequency converter, 7-1 and 7-2 are data communication signal terminal devices, 9-1 and 9-2 are voice communication signal terminal devices, 10 is a transmission frequency converter, and 11 is a high power amplifier. is there.

As shown in FIG. 1, the portion for transmitting and receiving a common signal is made independent as one common signal transmitting / receiving device 5, and the common signal transmitting / receiving device 5 and the data communication signal transmitting / receiving device 6 connected to the multicarrier control device 4 are separated. 1, 6-2 and the data communication signal transmission / reception devices 6-1 and 6-2 or the voice communication signal transmission / reception device 8 by the monitoring control cable 20 connected to the logic unit 19 of the voice communication signal transmission / reception devices 8-1 and 8-2. The common signal transmitting / receiving device 5 monitors and controls the states of -1 and 8-2, and the logic unit 19 of the common signal transmitting / receiving device 5 selects the frequency of the common signal for data communication or voice communication and shares the frequency control signal 101. A common signal that passes to the signal processing unit 16 and informs the state of the device by the controlled frequency is transmitted through the antenna 1 via the satellite and the data communication of the control station in the same manner as in the prior art. It is sent to the signal transmitting and receiving device or voice communication common signal transmitting and receiving device.

When a communication frequency is specified by a common signal from a common signal transmitting / receiving device for data communication or a common signal transmitting / receiving device for voice communication of the control station, a logic unit 19 of the common signal transmitting / receiving device 5 sends a monitoring control cable 20. The frequency control signal 101 is transmitted from the logic unit 19 of the data communication signal transmitting / receiving devices 6-1 and 6-2 or the voice communication signal transmitting / receiving devices 8-1 and 8-2 to the data communication signal processing unit 17 or the voice communication signal processing unit 18 through The information indicating that the control has been performed is transmitted again from the common signal transmitting / receiving device 5 to the control station through the monitor control cable 20.

[0021]

As described above, according to the present invention, 3
A plurality of satellite communication earth stations more than one station use a request assignment satellite communication system in which two or more transmission paths are shared in accordance with an instruction from a control station, and a plurality of satellite communication earth stations use a plurality of satellite communication. When present, the portion for transmitting and receiving the common signal is made independent as a common signal transmitting and receiving device, so that the common signal can be transmitted and received at a low speed, the satellite communication line can be effectively used, and the data communication signal transmitting and receiving device can be used. In addition, since the common signal processing unit is deleted from the voice communication signal transmitting / receiving device, the more the number of data communication signal transmitting / receiving devices and voice communication signal transmitting / receiving devices, the lower the cost and the more economical.

The frequency of the common signal is switched for data communication or voice communication by the common signal transmitting / receiving device.
Since these have the same information rate, there is no problem that the signal pull-in time is fast, and two or more types of devices can be monitored and controlled by one common signal transmitting / receiving device.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a satellite communication earth station according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a conventional satellite communication earth station.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 antenna 2 low noise amplifier 3 reception frequency converter 4 multicarrier control device 5 common signal transmission / reception device 6-1, 6-2 data communication signal transmission / reception device 7-1, 7-2 data communication signal terminal device 8-1, 8-2 Voice communication signal transmission / reception device 9-1, 9-2 Voice communication signal terminal device 10 Transmission frequency converter 11 High power amplifier 12 Distribution unit 13 Synthesis unit 14 Demodulation unit 15 Modulation unit 16 Common signal processing unit 17 Data communication Signal processing unit 18 Voice communication signal processing unit 19 Logic unit 20 Monitoring and control cable 101 Frequency control signal

Claims (2)

(57) [Claims] 1. A common signal control of a satellite communication line using a request assignment satellite communication system in which a plurality of three or more satellite communication earth stations perform communication by sharing two or more transmission paths according to an instruction from a control station. In the method, a configuration for transmitting and receiving a common signal is made independent as a common signal transmitting and receiving device, and a state of both a data communication signal transmitting and receiving device for transmitting and receiving data communication signals and a voice communication signal transmitting and receiving device for transmitting and receiving voice communication signals are common. The signal transmission / reception device monitors and controls, and the transmission / reception frequency of the common signal transmission / reception device is switched for data communication or voice signal. The status is transmitted to the control station's data communication common signal transceiver and voice communication common signal transceiver, and the control station's data communication A common signal for a satellite communication line, which transmits a communication signal frequency allocated from a common signal transmitting / receiving device or a common signal transmitting / receiving device for voice communication to a data communication signal transmitting / receiving device or a voice communication signal transmitting / receiving device to perform frequency control. Control method. 2. A satellite communication earth station using a request assignment satellite communication system in which a plurality of three or more satellite communication earth stations perform communication by sharing two or more transmission paths according to an instruction from a control station. A common signal control device for a satellite communication line having a signal transmitting / receiving device, a data communication signal transmitting / receiving device, a voice communication signal transmitting / receiving device, and a multicarrier control device, wherein the common signal transmitting / receiving device is a common signal from a control station. , A common signal processing means for processing the received common signal, a common signal processed by the common signal processing means to the control station, a common signal transmission means, and a logic unit for changing the frequency of the common signal. Frequency communication means for selecting between data communication and voice communication. The data communication signal transmitting and receiving device is configured by a logic unit of the common signal transmitting and receiving device. Data communication signal receiving means for receiving data communication with another satellite communication earth station at a fixed frequency, data communication signal processing means for processing the received data communication signal, and data communication signal processing means A data communication signal transmitting means for transmitting a data communication signal to another satellite communication earth station, wherein the voice communication signal transmitting / receiving apparatus transmits the other satellite communication signal at a frequency designated by a logic unit of the common signal transmitting / receiving apparatus. A voice communication signal receiving means for receiving voice communication with the earth station, a voice communication signal processing means for processing the received voice communication signal, and a voice communication signal processed by the voice communication signal processing means for transmitting the voice communication signal to another satellite communication earth station A multi-carrier control device, a common signal transmission / reception device, a plurality of data communication signal transmission / reception devices, and a plurality of data communication signal transmission / reception devices. Receiving communication signal distributing means for distributing a receiving communication signal to a voice communication signal transmitting / receiving apparatus, and transmitting communication for combining transmission communication signals from a common signal transmitting / receiving apparatus, a plurality of data communication signal transmitting / receiving apparatuses, and a plurality of voice communication signal transmitting / receiving apparatuses. A common signal control device for a satellite communication line, characterized by having a signal combining means.