JPS63209329A - Dama communication system - Google Patents

Abstract

PURPOSE:To attain the private line communication during the request assignment system (DAMA) communication service operation by registering number of private line communication lines and a slave station applying private line communication service in a master station. CONSTITUTION:When the master station registers a slave station applying private line communication and number of private communication lines, a relay line trunk 9a and the channel carrier of the slave station are reserved. When a line assignment request from an exchange 7 of the slave station is received by the master station, the channel carrier reserved for the private line communication is assigned. Moreover, when the relay line trunk in the idle state exists with respect to the line assignment request of the slave station other than the private line, the line assignment processing is applied. Thus, the DAMA communication and the private line communication are applied simultaneously.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is based on DAMA (on-demand line allocation method: Dem
and Assigned Multiple Acc
The present invention relates to a communication system (Ess), and in particular to a line allocation system for a satellite communication system in the centrally controlled DAMA system.

[Conventional technology]

Here, for convenience of explanation, a 5CPC/6AMA satellite communication system will be explained as an example. In addition, SCP C (Sin
GL Channel Per Carrier) refers to a line in which one communication path consists of one carrier. In addition, the above-mentioned centralized control type DAMA system means that, for example, when one master station and many slave stations are installed to communicate, one or more carriers among the 5 cpc carriers are used to control call connection between the master station and slave stations. Common channel signal (CCS: Commo
n Channel Signaling) line,
When connecting any slave stations using the remaining carriers as communication paths,
When the master station receives a line allocation request from the calling slave station using the above CC8 line, it selects an empty communication path from the above communication paths, instructs the calling and called slave stations via the above CC8, and communicates. In this way, especially in DAMA, call connection control between slave stations is centrally managed by the master station.
The method is called the centralized control type DAMA method.

Figure 1 shows a satellite communication system that uses the DAMA method, where 1 is a communication satellite, 2 is a master station with a satellite line allocation function, and 3a, 3b, 3c, . . . , 3n are slave stations. .

Figure 2 shows 5c in one repeater installed on communication satellite 1.
An example of the arrangement of PC carriers is shown. 4 is a 5CPC carrier for the CC8 line for sending call connection control signals from the master station 2 to each slave station 3a, 3b, 3c, ..., 3n, and 5 is a 5CPC carrier for each slave station. Child stations 3a and 3b.

5CP for CCS line from 3c, ..., 3n to master station 2
It is a C carrier. 6a, 6b, 6c, -, 6n are 5cpc carriers for communication paths allocated by the master station 2 between two slave stations that have requested communication.

FIG. 3 shows an example of the equipment configuration of each station. 7 indicates the exchange side, and 8a, 8b, . . . are trunk lines connecting the exchange and trunk trunks 9a, 9b, .

10 is a control device of the DAMA system, lla, 11a,
... is a 5cpc transceiver with synthesizer, 12 is CC
The S signal transceiver 13 is an intermediate frequency/high frequency device including an antenna.

Next, the operation will be explained.

Let us take as an example a case where one dedicated line communication is performed between slave stations 3a and 3b. Since there is no service that performs dedicated line communication between specific slave stations while operating the DAMA communication service, first slave stations 3a,
3b and 5cpc carrier 6a for leased line communication communication path,
6b is deleted from the service target by the master station 2. and the third
In the figure, the exchange 7 connected to the slave stations 3a and 3b blocks all lines other than the trunk line 8a, and the 5cpc with synthesizer
5CPC carriers 5a and 5b for dedicated line communication channels are set in the transmitter/receiver 11a. Thereafter, calls from the exchanges 7 of the slave stations 3a and 3b always arrive at the exchanges of the slave stations 3b and 3a, and are serviced as dedicated line communications.

[Problem that the invention seeks to solve]

In this way, in conventional leased line communication, the slave station for leased line communication is
Because the slave station is removed from the AMA communications service, services other than leased line communication cannot be received at the slave station, and normal communication paths are not formed. Since the other trunk lines are blocked, the number of lines from the exchange side is reduced, and there is also the problem that calls from the exchange always arrive at the slave station via the leased line communication line.

The present invention was made to solve the above problems, and
The purpose of the present invention is to obtain a DAMA communication method that allows dedicated communication to be performed during operation of a DAMA communication service.

[Means for solving problems]

In the DAMA communication method according to the present invention, a control device of a master station registers a slave station that provides a leased line communication service and the number of leased line communication lines, and a trunk line trunk corresponding to the number of leased line communication lines of the slave station is registered. A line corresponding to the number of reservation and leased line communication lines is reserved, and when a line allocation request between the slave stations is accepted, the reserved line is allocated.

[Effect]

In this invention, in order to perform dedicated line communication by registering the slave stations that provide dedicated communication service and the number of dedicated line communication lines in the master station, the switchboard of the slave station blocks trunk lines other than those for dedicated line communication. For example, in the 5cpc system, there is no need to set up a 5cpc carrier for a communication path using a 5cpc transmitter/receiver with a synthesizer for leased line communication.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration to which the embodiment system of the present invention is applied.

It is similar to FIG. However, functions have been added to the master station 2.

Next, to explain the line allocation method for leased line communication in this embodiment, first, the slave station 3a, which performs leased line communication with the master station 2 in FIG.
If you register one line as 3b and the number of leased line communication lines,
At the master station 2, a reservation is made for the trunk line trunk 9a of the slave station and the 5 CPC carriers 6a and 6b for communication paths. After that, when the master station 2 receives a line allocation request from the exchange 7 of the slave station 3a or 3b, it checks whether the receiving station is 3b or 3a and checks whether a leased line communication line has already been allocated. and if it is determined to be leased line communication, the call path 5c reserved for leased line communication is used.
Assign PC carriers.

However, since the call from exchange t87 is made to a vacant trunk line at this time, the reserved trunk trunk 9a is made to match the trunk trunk for which the line allocation request was made.

In addition, for line allocation requests other than leased line communication from slave stations 3a and 3b, if there is an empty trunk trunk in (total number of trunk line trunks) - (number of trunk line trunks for leased line communication) , performs line allocation processing.

Similarly, line allocation processing is performed for incoming calls other than dedicated communications to slave stations 3a and 3b.

In the above embodiment, the satellite line is a 5 cpc line, but it may be a TDMA line. Further, although there is one master station, a standby master station may be provided.

〔Effect of the invention〕

As described above, according to the present invention, the master station performs dedicated line communication by registering the slave stations that provide dedicated communication service and the number of dedicated line communication lines.
Leased line communication can be performed during communication service operation, and in a slave station that performs leased line communication, DAM in addition to leased line communication
A communication can be performed. In addition, at the slave station, the relay line other than dedicated line communication is blocked by a switch.

For example, when the 5cpc system is adopted, there is an effect that it becomes unnecessary to set a 5cpc carrier for a dedicated line communication channel in a 5cpc transmitter/receiver with a synthesizer for dedicated line communication.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram of a satellite communication system employing the DAMA method, FIG. 2 is a diagram showing an example of a 5-cpc carrier arrangement within a satellite repeater, and FIG. 3 is a diagram showing an example of the equipment configuration of each slave station. DESCRIPTION OF SYMBOLS 1...Communication satellite, 2...Main station, 3a-3n...Slave station, 6a-6n...Communication path carrier, 7...Interchanger side, 8a, 8b...Relay line, 10...control device, I
la, 11b...5cpc transceiver with synthesizer.

Claims (1)

[Claims] (1) A centralized control type DAMA communication system in which call connection control between slave stations is centrally managed by the master station when satellite communication is performed between a master station and multiple slave stations via a communications satellite repeater. At the above-mentioned master station, register the slave stations to be used for leased line communication and the number of leased line communication lines, and reserve the transceivers of the registered slave stations for the number of registered leased line communication lines. , A DAMA communication method characterized in that when receiving a line allocation request from the registered slave station to the slave station, the registered private line communication line is allocated, and dedicated communication is performed during operation of the DAMA communication service. .