JPH02211726A - Multicast multi-address system for satellite network - Google Patents

Abstract

PURPOSE:To widely use satellite lines by providing network entry information to transfer data to plural specific destinations at a time. CONSTITUTION:A system consists of a satellite network management device SNCP, a satellite access controller SAC as the master station, and plural repeaters BBP1 to BBP4 as slave stations. Information to give correlations of multi-address port 1 to 7 between master and slave stations is given as network entry information to user ports only for multi-address communication, and then, input data from an arbitrary multi-address port of the master station is outputted to multi-address ports of one or more slave stations corresponding to this multi-address port and input data from an arbitrary multi-address port of slave stations is outputted to a specific multi-address port of the master station. Thus, the general usefulness of satellite lines is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to broadcast communication using the broadcast capability of satellite lines.
In particular, the present invention relates to a multicast broadcasting system in which user ports are grouped to enable data transfer to a plurality of specific destinations.

[Prior Art] Conventionally, this type of broadcasting function has been used for controlling functions between repeaters, broadcasting without specifying a destination, and the like.

[Problems to be Solved by the Invention] When utilizing the conventional broadcasting function described above, there are the following drawbacks.

In the case of broadcasting from the satellite access control device, which is the master station, due to the characteristics of the satellite line, the broadcast data from the master station is transferred to all the slave stations, which are repeaters, and the data is distributed even to unnecessary users. It will be done.

[Means for Solving the Problems] The multicast broadcast system according to the present invention has user ports dedicated to broadcast communication on a satellite access control device as a main station and a plurality of repeaters as slave stations, respectively. Information that correlates the broadcast boats between the master station and the slave stations is added to the user port as network subscription information, thereby allowing input data from any broadcast boat of the master station to be transferred to the broadcast boat. It is characterized by being able to output data to the broadcast boat of one or more slave stations associated with the master station, and conversely outputting input data from any broadcast boat of the slave station to the broadcast boat of a specific master station. do.

[Example] Next, the present invention will be explained with reference to the drawings.

FIG. 1 shows an example of a system configuration to which the present invention is applied, which includes a satellite network management device 5NCP, a satellite access control device SAC serving as a master station, and a plurality of repeaters BBP serving as slave stations. Here, broadcast boat 1 on the master station side is connected to broadcast boats 4, 5.6 on the slave side, and broadcast boat 2 is connected to broadcast boats 5, 6 on the slave side.
Broadcast boat 3 is associated with broadcast boats 4 to 7, respectively.

FIG. 2 shows the flow of data during broadcasting and during individual communication from repeaters.

FIG. 3 shows the network subscription information assigned to the broadcast boats of the master station and the slave station, respectively.

First, the acquisition of network subscription information will be explained.

1. The satellite network management device 5NCP sends network subscription information to the satellite access control device SAC and each broadcast boat control device on the repeater BBP using the physical line PL and the satellite line.

2. The broadcast boat control device on each repeater takes in the matching information between the address information of its own port and the group address information of the other party included in the network joining information, and recognizes the group address that its own port is aware of.

Next, the operation of this embodiment will be explained.

I Multicast broadcast communication from the broadcast boat on the Satellite Access Control Unit SAC.

1. Regarding the input data from the broadcast boat, a group address is assigned as a header section, and the data is sent to the satellite with broadcast specification. (Due to the characteristics of the satellite line, the input data is transferred to all repeaters.) 2. As shown in Figure 2, the broadcast boat control device of the repeater BBP handles the human input data from the satellite in the header section. Browse group addresses. If the address matches the address given to the own boat, the header part is removed and output to the line side. If they do not match, the human data will be discarded.

■ Individual communication from the broadcast boat on the repeater.

1. Regarding the input data from the broadcast boat, the broadcast boat control device assigns a group address as a header section, and sends it to the satellite by specifying the broadcast port seed of a specific satellite access control device SAC.

2. The individually designated input data is output to the four-line side after the header portion is removed by the broadcast boat control device of the satellite access control device.

[Effects of the Invention] As explained above, the present invention makes it possible to shorten the information transmission time by making use of the characteristics of the satellite line, and to reduce the use of resources by eliminating the need for a storage function. This allows simultaneous transfer to multiple specific destinations, which has the effect of making general use of the satellite line possible.

[Brief explanation of the drawing]

FIG. 1 shows an example of a system configuration to which the present invention is applied;
The figure is a diagram for explaining the flow of data during broadcasting and individual communication from repeaters, and FIG. 3 is a diagram showing network subscription information assigned to the broadcast boat control device. In the figure, 5NCP is a satellite network management device, SAC
is a satellite access control device, and BBP is a repeater. Figure SAC boat network subscription information BBP boat network subscription information

Claims (1)

[Claims] 1) When performing satellite communication, a port for broadcast communication is installed on each of the main station and multiple slave stations that relay data from end users, and the port between the master station and slave stations is transmitted as network subscription information to the port. This allows input data from any port of the master station to be output to the broadcast port of one or more slave stations associated with that port, and vice versa. A multicast broadcasting method for a satellite network, which is characterized in that input data from any port of the satellite can be output to a port of a specific main station.