JPH04306923A - Satellite relay communication equipment - Google Patents

Abstract

PURPOSE:To prevent useless line block from being caused by using a satellite channel for a communication path till an exchange and selecting the satellite channel when the satellite line or an underground channel is selected as a succeeding communication path. CONSTITUTION:A terminal equipment 11 is connected to a subscriber exchange 31 via a satellite channel set by satellite terminal equipments 21, 22 and a terminal equipment 12 is connected to the exchange 31 via an underground channel. The exchange 31 selects either the satellite channel or the underground channel. For example, when the terminal equipment 11 makes a call, the transmission reception of a call control signal is implemented with the exchange 31 through a subscriber signal line 101 and a subscriber information line 201 is set between satellite terminal equipments 21, 22. Since the exchange 31 selects a relay information line 301 by the satellite channel as a succeeding communication path because the subscriber signal line 101 passes through the satellite channel and connects the subscriber information line 201 to the channel 301.

Description

[Detailed description of the invention]

0001

FIELD OF INDUSTRIAL APPLICATION The present invention is applied to a communication network in which either a terrestrial line or a satellite line can be selected as a communication route. In particular, it relates to selection of communication paths.

0002

2. Description of the Related Art FIG. 6 shows a block configuration of an example of a satellite relay communication device that can select either a terrestrial line or a satellite line as a communication route, and an example of the flow of communication route selection.

[0003] The terminal 11 has a satellite terminal equipment 21, a satellite line, and a subscriber signal line 101 passing through the satellite terminal equipment 22.
The terminal 12 is connected to the local exchange 31 via a subscriber signal line based on a terrestrial line. The subscriber exchange 31 is connected to the subscriber exchange 32 via a satellite line set by the satellite terminal devices 23 and 25, a terrestrial line passing through the relay exchanges 41 and 42, and a terrestrial line passing through the relay exchange 43. . The subscriber exchange 32 includes a satellite terminal device 27, a satellite line, and a subscriber signal line 102 that passes through the satellite terminal device 26.
Terminal 13 is connected, and terminal 14 is connected via a subscriber signal line based on a terrestrial line. Further, in this example, the satellite terminal device 24 is also connected to the relay exchange 41. The subscriber exchanges 31 and 32 and the relay exchanges 41 to 43 are connected by a signal line network, and further, to this signal line network,
A satellite relay exchange 50 is connected which performs connection processing of relay sections using satellite lines.

[0004] Here, a case where a call is originated from the terminal 12 and received at the terminal 13 will be explained.

When the terminal 12 makes a call, call control signals are exchanged between the terminal 12 and the subscriber exchange 31 via the subscriber signal line 101, and terminal information is exchanged between the satellite terminal equipment 21 and 22. A subscriber information line 201 is set up. The subscriber exchange 31 has a relay information line 301 that passes through the satellite terminal device 23, a relay information line 302 that passes through the relay exchange 41, and a relay exchange 43 as communication paths.
It is possible to select any one of the relay information lines 303 that go through.

[0006] Here, it is assumed that the relay information line 303 is selected. In that case, subscriber information line 201 and relay information line 303 are connected, and relay exchange 43 is notified of a call connection request signal. The relay exchange 43 is a relay information line 303
is connected to the relay information line 304 and notifies the subscriber exchange 32 of a call connection request. The subscriber exchange 32 recognizes that the terminal 13 is accommodated by the satellite line, and changes the setting of the information line using the satellite line between the satellite terminal devices 21 and 27. That is, the satellite terminal device 21 closest to the originating terminal 12 and the satellite terminal device 27 closest to the destination terminal 13
An information line using a wireless line is set up between the terminal devices 12 and 13, and terminal information is transmitted and received between the terminal devices 12 and 13 via this.

[0007]

[Problems to be Solved by the Invention] As described above, in the conventional communication route setting method, a satellite line is set up to connect the satellite end station device closest to the calling terminal and the satellite end station device closest to the destination terminal. In some cases, prior to this, a relay line that is not actually used for communication may be temporarily set up.

SUMMARY OF THE INVENTION An object of the present invention is to provide a satellite relay communication device that can solve the above problems and set up a communication route without creating unnecessary line sections in the relay section.

[0009]

[Means for Solving the Problems] The satellite relay communication device of the present invention provides at least a portion of an exchange including line selection means for selecting and setting a line between a satellite line and a terrestrial line. Satellite lines are used for the communication route of
Furthermore, when either a satellite line or a terrestrial line can be selected as the subsequent communication route, the present invention is characterized by including means for selecting the satellite line as the subsequent communication route.

0010

[Operation] When the exchange can select either a relay line using a terrestrial line or a relay line using a satellite line, the relay line via the satellite line is selected for calls that have already passed through the satellite line. Therefore, there is no need to set up a trunk line that is not actually used, and the trunk line can be used effectively.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing a satellite relay communication apparatus according to an embodiment of the present invention.

This communication device includes subscriber exchanges 31 and 32, relay exchanges 41 to 43, and satellite relay exchange 50 as a plurality of exchanges, and at least a part of the plurality of exchanges, in this example, subscriber exchanges 31 and 32. The relay exchange 41 includes line selection means for selecting either a satellite line or a terrestrial line and setting the line. Satellite terminal devices 22 and 23 are connected via lines, a satellite terminal device 24 is also connected to the relay exchange 41, and satellite terminal devices 25 and 26 are connected to the subscriber exchange 32.

[0013] The subscriber exchange 31 includes a satellite terminal equipment 21
, 22 are connected to the terminal 11, and the terminal 12 is connected to the terminal 12 through the terrestrial line. Furthermore, a terminal 13 is connected to the subscriber line 32 via a satellite line set up by satellite terminal stations 26 and 27, and a terminal 14 is connected via a terrestrial line.

[0014] This communication device further includes a satellite relay exchange 50 that performs connection processing of a relay line section by a satellite line,
This satellite relay exchange 50, subscriber exchanges 31 and 32, and relay exchanges 41 to 43 are connected through a signal line network.

FIG. 2 is a flowchart showing part of the communication route selection process in each of the subscriber exchanges 31 and 32 and the relay exchange 41. These exchanges allow you to choose between satellite lines and terrestrial lines, and the satellite line is used for the communication route to the exchange, and you can also choose between the satellite line and terrestrial line as the subsequent communication route. In this case, a satellite link can be selected as the subsequent communication path.

FIGS. 3 to 5 are diagrams showing examples of route selection when the terminal 11 makes a call and the call arrives at the terminal 13.

When the terminal 11 makes a call, call control signals are exchanged between the terminal 12 and the subscriber exchange 31 via the subscriber signal line 101, and as shown in FIG. A subscriber information line 201 is set up between 22 and 22. Since the subscriber signal line 101 is via the satellite line, the subscriber exchange 31 selects the relay information line 301 via the satellite line as the subsequent communication path, and connects the subscriber information line 201 to this relay information line 301. Connect. It also notifies the satellite relay exchange 50 of a call connection signal.

The satellite relay exchange 50 selects the subscriber exchange 32 as the connection destination, and changes the setting of the information line between the satellite terminal devices 21 and 25 using the satellite line. As a result, as shown in FIG. 4, an information line 202 is set up between the satellite terminal devices 21 and 25, and a call connection signal is notified to the subscriber exchange 32.

The subscriber exchange 32 connects the subscriber signal line 10
2 recognizes that the terminal 13 connected via the satellite line is connected, and changes the setting of the information line using the satellite line between the satellite terminal devices 21 and 27. As a result, as shown in FIG. 5, the satellite terminal device 21 closest to the originating terminal 11 and the satellite terminal device 27 closest to the destination terminal 13 are connected via the information line 203, and communication is performed via this line. will be held.

[0020]

[Effects of the Invention] As explained above, the satellite relay communication device of the present invention has the advantage that when an exchange can select either a relay line using a terrestrial line or a relay line using a satellite line, By selecting a relay line via a satellite line for a call, it is possible to prevent a terrestrial line that is not actually used from being set up.

[0021] That is, when a satellite line is set up to connect the satellite end station device closest to the originating terminal and the satellite end station device closest to the destination terminal, no wasted line section is created in the relay section; This has the effect of making effective use of terrestrial lines.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram showing a satellite relay communication device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing communication route selection processing.

FIG. 3 is a diagram showing an example of the flow of communication route selection.

FIG. 4 is a diagram showing an example of the flow of communication route selection.

FIG. 5 is a diagram showing an example of the flow of communication route selection.

FIG. 6 is a diagram illustrating a block configuration of a conventional satellite relay communication device and an example of a communication route selection flow thereof.

[Explanation of symbols]

11-14 Terminal 21-27 Satellite terminal equipment 31, 32 Subscriber exchange 41-43 Trunk exchange 50 Satellite relay exchange

Claims (1)

[Claims] Claim 1: A system comprising a plurality of exchanges, at least some of the plurality of exchanges including a line selection means for selecting either a satellite line or a terrestrial line and setting a line; In a satellite relay communication device in which a satellite end station device is connected to the switch, which connects a terminal station or another switch via a satellite line, at least a part of the switch including the line selection means has the following functions: When a satellite line is used for the communication route to the exchange, and either the satellite line or the terrestrial line can be selected as the subsequent communication route, the system further includes means for selecting the satellite line as the subsequent communication route. Satellite relay communication equipment.