JPH0383424A - Satellite communication line controller - Google Patents

Abstract

PURPOSE:To eliminate necessity for setting up a remote controller and to reduce the price of a system by executing prescribed call origination from a terminal equipment connected to each earth station, detecting this call originating signal by a detecting circuit, generating a reset signal corresponding to this detection and initializing a network controller and a station controller. CONSTITUTION:When initialization is executed, a specified dialing showing reset is executed from the terminal equipment. In a station controller 13, when a certain specified dial pulse requesting the initialization is detected by a dial pulse detecting circuit 14, the reset signal is generated from a reset signal generating circuit 15. Simultaneously with this generation, the station controller 13 sends out an initializing signal showing the execution of initialization through an antenna part 9 to a network controller 12 of a host station 2. Corresponding to this signal, the network controller 12 initializes the station controller 13 of the earth station executing the initialization before line abnormality occurs. Accordingly, even when the station controller is set up in an unmanned place, it is not necessary to provide the remote controller and the system is low-priced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a satellite communication system to which a line connection request allocation method is applied.

(Prior Art) In a satellite communication system, as a satellite line allocation method when multiple connection is made between a plurality of earth stations, there is a fixed allocation (briasyment) method in which a line is fixedly allocated to each earth station. There is a method in which a fixed number of lines are pooled in common to each earth station, and each time a call occurs, a pair of sending and receiving lines in the common pool is assigned to an earth mantle.

Among these, the single line connection request allocation method is a method that allows a limited number of lines to be used effectively by a large number of earth stations. There are two types of line connection request allocation systems: a centralized control system in which one earth station serves as a master station and the master station controls all satellite lines; and a distributed control system in which each earth station controls its own satellite lines.

1 and 2 are diagrams schematically showing a communication system using a line connection request allocation method using a centralized control method. In the figure, communication satellite 1
The master station 2, the slave stations 3, and the slave stations 4 communicate via the base station. Several exchanges 6 are connected to these master station 2 and slave stations 3.4 via trunk lines 5. However, in the figure, only one exchange 6 is shown for convenience of explanation. Several terminal devices 8 are connected to each of these traffic control machines 6 via subscriber lines 7.

Here, the configuration of the master station 2 includes an antenna unit 9 that transmits and receives signals to and from a communication satellite, and a transmitting/receiving device 1 connected to the antenna unit 9.
0. Terminal equipment 1 that performs modulation and demodulation to connect with exchange 6
1. It further comprises a network control device 12 which is connected to this terminal device 11 and the exchange 6 and controls the line.

Here, the network control device 12 has satellite line management, allocation and release functions, a management function for managing the slave stations 3 and 40 station control device 13, and a common signal line control function.

Next, the configuration of slave stations 3 and 4 will be explained. Here, similarly to the master station 2, a terminal device 11 is connected to the antenna section 9 via a transmitting/receiving device 10, and is connected to an exchanger 6 via a relay a5. Further, a station control device 13 is connected to the terminal device 11, and this station control device 13 is also connected to the exchange 6 via a trunk line 5. This station control device 13 has a function of setting and releasing line allocation requests. Additionally, a reset path is built-in to initialize line allocation to slave stations when an abnormality occurs in one line control.

In such a configuration, when a call is made from the terminal device 8 of a certain earth station (for example, slave station 3), the exchange 6 is activated, and then the earth station 3 is activated. A line assignment request is sent from the station controller 13 of the calling earth station to the network controller 12 of the master station 2 via the common signal line. In response to this, the network control device 12 selects the earth station (for example, slave station 4) to receive the call.
Both station control and fl13 are used to control the terminal. The station control device 13 of the called earth station activates the exchange 6 connected thereto, and connects it to the terminal device 8 with which the calling party wishes to communicate. In this way, the calling side and the called side communicate.

Here, if an abnormality or failure occurs in the satellite communication network and communication becomes impossible, the network control device 1 installed in each earth station
2 and the station controller 13 are initialized 1□□□] 工□13゜6.1. Initialization was performed by pressing the 1/1 switch on each earth station. Therefore, network control device 1
2 and the station control device 13 cannot be installed in an unmanned location, and if they were installed in an unmanned location, it would be necessary to provide a remote control device or the like.

(Problem to be Solved by the Invention) As stated above, when an abnormality occurs in the satellite line, it is necessary to initialize the network control device and the station control device at each earth station. If the device and the station control device are located in an unattended location, a remote control device must be provided, which poses a problem in that the system becomes expensive.

Therefore, the present invention eliminates such problems and can operate even if the network control device and the station control device are in an unattended place.

It is an object of the present invention to provide a satellite communication line control device that can easily initialize a network control device and a station control device without providing a remote control device.

[Structure of the invention]

(Means for Solving Problem 11) The present invention provides a satellite communication line control device using a line connection request allocation method for controlling communication lines between each earth station, in which terminals connected to each of the earth stations are provided. a detection circuit that detects an initialization call signal output from the device; a reset signal generation circuit that generates an initialization signal in response to the initialization call signal of this detection circuit; The initial stage of line allocation control (
Effect) In the present invention, in order to be able to initialize the network control device and station control device within each earth station from the terminal device connected to each earth station, a predetermined call is made from the terminal device for initialization. conduct. This calling signal is detected by a detection circuit, and a reset signal is generated in response to this, thereby initializing the network control device and the station control device.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a master station 2 including an exchange and a terminal device. In the figure, a master station 2 is connected to an antenna unit 9 for transmitting and receiving data to and from a communication satellite 1, and a terminal device 11 comprising a modem and the like for modulating and demodulating a transmitting and receiving device 10.
A network control device 12 is connected to this terminal device 11 . The terminal device 11 and the network control device 12 are connected to an exchange 6 via a trunk line 5, and further connected to a terminal device 8 via a subscriber line 7. Here, the trunk line 5 is the network control device ft11.
2. An SR line that transmits dial signals from the exchange 6, an SS line that transmits dial signals from the exchange 6 to the network control device 12, and a JWR line that transmits voice and data signals to the exchange 6. It consists of 4WS lines that send voice and data signals from the exchange 6 to the terminal equipment 14. Of these, a dial pulse detection circuit 14 that detects dial pulses sent from the terminal R8 for initialization is connected to the SS line, and a reset signal generation circuit 15 is connected to the dial pulse detection circuit 14. It is.

The reset circuit 16 in the M control 41 circuit 12 is operated. Further, a reset end sound generation circuit 18 is connected to the JWR line, which generates a reset end sound when the reset circuit 16 operates and the line control device jit12 is initialized.

Furthermore, the configuration of the slave station 3 and the slave station 4 is that the network control device 1 of the master station 2
2 is replaced with the station control device [13, so the explanation will be omitted here.

Pjl reveals about the next K1127 work. Here, a case where the initialization operation is performed from the terminal device 8 connected to the slave station 3 will be described.

First, when performing initialization, a specific dialing indicating a reset is performed from the terminal device. This dial pulse activates the exchange 6 and is input to the station control device R13 via the connected trunk line 5.

In the station control device 13, when the dial pulse excitation circuit 14 detects a specific dial pulse requesting initialization, the reset signal generation circuit 15 generates a seven-foot signal. The station control device 13 is initialized by this reset signal, and the 9-set end sound generation circuit 17 generates a reset end sound.

A reset completion tone is transmitted to the terminal device 8 that made the call through the exchange 6, thereby informing the terminal device 8 that the initialization of the one-station control device Ylia has been completed.

At the same time, the station control device 13 sends an initialization signal to the network control device l12 of the master station 2 via the antenna section 9, indicating that initialization has been performed. In response, the network control device 12 initializes the station control device 13 of the earth station (for example, slave station 4) with which communication was occurring before the line abnormality occurred.

In this way, by dial-linking a predetermined specific dial from the terminal device I78, it is possible to initialize the station controllers 13 of both the calling and called earth stations.
You can return to the state before communication started.

What has been described above is part of the invention! This is just an example and should not be relied upon.In these examples, a line connection request allocation method using a centralized control method was described, but each earth station individually allocates and releases satellite lines. Needless to say, it can also be used in a line request allocation method using a distributed control method. In this way, various modifications can be made without departing from the gist of the present invention.

In addition, we have described the initialization for line assignment when slave stations are communicating with each other, and also the procedure for initialization when communicating between R station 2 and slave stations. [Effects of Matsu's invention] As mentioned above, if an abnormality occurs in the % satellite line, the station control device can be initialized from the terminal device, so the station control device can be initialized from the terminal device. There is no need to throw a remote control device even if the stage is placed in an unmanned place, making the system cheaper.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention;
The figure is a diagram showing an outline of the line connection request allocation method of the centralized control method. = Indication IJ1mu. l...communication satellite, 2...master earth station, 3
, 4...Slave earth station, 5...Relay line, 6...
・Switchboard, 7... Subscriber line, 8... Terminal device,
9... Antenna section, 10... Transmitting/receiving device,
11... Terminal device, 12... Network control device, 13
...station control device, 14.. dial pulse detection circuit, 15.. reset signal generation circuit, 17.
...Reset end sound generation circuit.

Claims (1)

[Scope of Claims] In a satellite communication line control device using a line connection request allocation method for controlling communication lines between each earth station, an initialization signal output from a terminal device connected to each of the earth stations. a detection circuit that detects a calling signal; a reset signal generation circuit that generates an initialization signal in response to the initialization call signal of the detection circuit; and a reset signal generation circuit that generates an initialization signal in response to the initialization signal from the reset signal generation circuit. 1. A satellite communication line control device comprising: a line control device that initializes line allocation control.