JPH0624359B2 - Line setting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a procedure for line setting in a satellite communication system or the like.

[Conventional technology]

Conventionally, in the line setting method in satellite communication, etc., a transmission channel is set between the originating station and the terminating station by using a control signal line different from the line (hereinafter also referred to as an information line) through which a signal should be transmitted, and The call signal and the response signal are transmitted and received from the terminal and the destination terminal, respectively, through the information line, and the information is transmitted only after they are received by the respective terminals.

FIG. 1 is a diagram for explaining a conventional line setting method.
Is a calling terminal, 2 is a calling station, 3 is a line control station, 4 is a called station, and 5 is a called terminal.

The call signal from the calling terminal is used as the control signal 6 by the line control station 3
Then, the line control station 3 transmits line assignment signals to the originating station 2 and the destination station 4 as control signals 7 and 8, respectively.

The calling station 2 and the called station 4 send the calling signal 9 of the calling terminal and the response signal 10 of the called terminal to the information lines allocated thereby. The calling terminal 1 and the called terminal 5 transmit the information 11 and 12 after receiving the response signal and the calling signal, respectively, and thereafter start communication (13 indicates a communication state).

[Problems to be solved by the invention]

As explained above, in the conventional line setting method,
In order to ensure the reliability of the line setting, we conduct an assigned line continuity test using a call signal from the calling terminal and a response signal from the called terminal.

However, this results in a large number of signal exchanges between the calling side and the called side, resulting in a long time required for line setting.

In order to eliminate this drawback, an object of the present invention is to provide a line setting method capable of shortening the line setting time while maintaining the reliability of the line setting equivalent to the conventional one.

Hereinafter, the configuration and the like of the present invention will be described in detail with reference to the drawings of the embodiments.

〔Example〕

FIG. 2 is a diagram for explaining one embodiment of the present invention.
Is a calling terminal, 2 is a calling station, 3 is a line control station, 4 is a called station, 5 is a called terminal, 14 is a line assignment request signal generated from a calling signal of the calling terminal to the line control station, and 15 And 16 are line allocation signals from the line control station to originating and terminating stations, 1
Reference numerals 7 and 18 denote information transmitted from the calling terminal and the called terminal, and 13 denotes a communication state.

FIG. 3 is a diagram showing an example of a time slot, (a) shows the case of the conventional system, and (b) shows the case of the present invention. Further, 19 to 21 represent information to be transmitted, and 22 to 24 represent specific signals.

The operation will be described below step by step.

The calling terminal 1 transmits a calling signal to the calling station 2 using a subscriber line. Next, the calling station 2 requests the band required for the calling terminal 1 to the line control station 3 as a line allocation request signal 14. The line control station 3 sends a line allocation signal 15 to the calling station 2 and the called station 4,
The assigned line (time slot) is notified by 16. The calling station 2 and the called station 4 which have received this receive the response signal from the called station 4 and the calling signal from the calling station respectively via the information line, Connect each line to the assigned satellite line.
At this time, the receiving side of the originating station and the receiving station 4 uses the time slot as shown in (b) instead of the conventional method as shown in FIG. 19-2
The specific codes 22, 23, 24, etc. added to 1) are collated with the specific codes assigned in advance for each satellite line, and if they match, the received signal is transmitted to the source terminal 1 and the destination terminal 5, respectively. .

The specific signal is, for example, a digital signal of a plurality of bits.

In the method of the present invention, the control as described above is performed. The reliability can be increased.

Further, as can be seen from FIGS. 1 and 2, the line setting time can be shortened (2/3 in this example).

In the description of the present embodiment, the case of making a call from the terminal is described, but the same applies to the case of allocating a line by command input from the keyboard for maintenance work or the like.

〔The invention's effect〕

As described above, in the line setting method according to the present invention, it is possible to omit the assigned line continuity test by the calling signal from the calling terminal and the response signal from the called terminal while keeping the reliability of the line setting high. There is an advantage that the line setup time can be shortened.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a conventional line setting method, FIG. 2 is a diagram for explaining one embodiment of the present invention, and FIG. 3 is a diagram for showing an example of time slots. 1 ... Originating terminal, 2 ... Originating station, 3 ... Line control station, 4 ...
Destination, 5 ... destination terminal, 6-8 ... control signal, 9, 17 ...
... Calling signal, 10-18 ... Response signal, 11, 12, 1
7, 18 ... Information, 13 ... Communication status, 14 ... Line allocation request signal, 15, 16 ... Line allocation signal, 1
9-21 ... Information to be transmitted, 22-24 ... Specific code

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Ryoichi Tanaka, 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Japan Telegraph and Telephone Public Corporation (72) Inventor Yoshiteru Morihiro 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Date This telegraph telephone public office (56) References JP-A-60-180227 (JP, A)

Claims (1)

[Claims] 1. A control signal line in a line setting method, wherein terminals are respectively connected to a source station and a destination station, and a satellite channel is set between the source station and the destination station by a call or command input from the terminal on the source side. The satellite line should be set up by sending and receiving signals between the originating station and the destination station via the, and by transmitting and receiving the signal, information should be transmitted to the originating station to identify the set line at the originating station and the destination station. A code corresponding to the information for specifying the set line is added to the information signal and transmitted to the set line, and the code is sent from the station at the destination and the signal is transmitted and received. And a line characterized by connecting the satellite line and the terminal connected to the destination when the corresponding satellite lines match with the information specifying the set line at the destination. Setting method