JPS62166628A - Satellite communication system - Google Patents

Abstract

PURPOSE:To perform multiplexing, number changing, and sending order changing simultaneously, by controlling the outputting timing of each data from channel buffers corresponding to each highway. CONSTITUTION:Date from each highway are buffered onto channel buffers 10 through an interface 1 and form a data group which is collected in a bursted state. On the other hand, a sending timing control section instructs data sending timing to individual channel buffers 10 by taking the forms of the data of a ground system and those to be sent to a satellite system and all of the multiplexing, number changing, and sending order changing into consideration. As a result, the data supplied to a speed changing buffer 6 through the sending timing control section 11 become those, on which bursting, multiplexing, number changing, and sending order changing are already performed.

Description

[Detailed Description of the Invention] [Summary] In a satellite communication system having a channel allocation control unit, multiplexing, slot number conversion and burst It is disclosed that the transmission order is converted in the form of

[Industrial application field]

The present invention relates to a satellite communication system, particularly a multiple channel communication system.
The present invention relates to a satellite communication system that employs a configuration that controls the timing at which data is output from a buffer so that processes such as multiplexing and bursting can be easily performed.

[Conventional technology]

Conventionally, in satellite communication systems, channel control as shown in FIG. 3 (only the transmitting side is shown) has been performed.

That is, data from a plurality of terrestrial highways are sent to each highway interface 1-0.1-1. ... and time-division multiplexed by multiplexer 2. Then, by terrestrial time slot number to satellite burst number conversion (hereinafter referred to as number conversion) 3, number conversion is performed between the time slot number in the terrestrial system and the burst number in the satellite system, and the satellite burst number is - To convert the transmission order between the satellite burst number order and the burst transmission order by number-to-burst transmission order conversion (hereinafter referred to as transmission order conversion) 4;

The time slots are rearranged by time slot rearrangement 5. Further, using the speed conversion buffer 6, speed conversion is performed to match the speed in the satellite system, and the signal is guided to the TDMA synchronization control section.

In performing the processing shown in FIG. 3, a configuration as shown in FIG. 4 is conventionally adopted. In FIG. 4, 1 and 2 correspond to FIG. 3.

7 is a time switch, 8 is a time switch control section,
Reference numeral 9 represents a memory that performs the functions of address control and speed conversion buffer. Time switch 7 in FIG. 4 performs an operation corresponding to time slot reordering 5 shown in FIG. Further, the time switch control section 8 performs control corresponding to number conversion 3 shown in FIG. Then, in the memory 9, the feeding order conversion 4 and speed conversion shown in FIG. 3 are performed.

[Problem that the invention seeks to solve]

Conventionally, the configuration shown in Figure 4 has been adopted, including a multiplexer for multiplexing and a time switch 7 for number conversion.
and its control section8. Units each having a dedicated function are provided, such as the memory 9 in which transmission order conversion and speed conversion are performed. For this reason, when the configuration or protocol of the terrestrial system or the satellite system is changed, the entire channel allocation control section must be changed to match the change, so the flexibility of the system is poor.

[Means for solving problems]

The present invention solves the above problems, and uses a simple configuration that controls the timing of outputting each data from the channel buffer corresponding to each highway, and can perform multiplexing, number conversion, and transmission order conversion all at once. I try to do it.

FIG. 1 shows a basic configuration diagram of the present invention. In the figure, l is the highway interface, 6 is the speed conversion buffer, and 1 is the highway interface.
0 represents a channel buffer, and 11 represents a transmission timing control section.

A channel buffer 10 is provided corresponding to each highway interface 1 and is configured to buffer and burst data from each highway. Further, the transmission timing control section 11 uses two processors, for example, to control each channel buffer 10-0.
．． 10-1° . . . to control the timing at which data is outputted.

[Effect]

Data from each highway is buffered on the channel buffer 10 via the interface 1, creating a burst of data. On the other hand, the transmission timing control unit takes into account the format of the data in the terrestrial system and the format of the data to be transmitted to the satellite system, and creates a configuration that takes into account all of the multiplexing, number conversion, and transmission order conversion described above. 1 instructs the data transmission timing for each channel buffer 10. As a result, the data supplied to the speed conversion buffer 6 via the transmission timing control section 11 has already been bursted and multiplexed, and has undergone number conversion and transmission order conversion. and,
The speed conversion buffer 6 is.

Performs speed conversion to match the speed of the satellite system, and performs TDMA
Supplied to the synchronization control section.

〔Example〕

FIG. 2 shows the configuration of an embodiment of the present invention. Code 1 in the figure.
6, 10.11 corresponds to FIG. 1, 12 is a channel allocation control section, 13 is an identity (ID) generation section, 14
15 represents a data bus, and 15 represents an ID bus.

As explained with reference to FIG. 1, the ID light generator 13 is connected to each channel buffer 10-
It is instructed to generate 10 of the channel buffer 10-1 in synchronization with the timing when i outputs data. by this.

The rD generating section 13 outputs the ID onto the ID bus 15. Each channel buffer 10-0, 10-1,...
..., the channel buffers 10-i simultaneously check for a match with their own ID numbers, and the channel buffers 10-i that have detected a match output burst data onto the data bus 14, as described above. In order for the ID light generator 13 to output specified IDs one after another, predetermined data is serialized and carried in burst form on the data bus 14, and the data is sequentially transferred to the speed conversion buffer 6. is supplied to The speed-converted signal is then guided to the TDMA synchronization control section.

〔Effect of the invention〕

As explained above, according to the present invention, multiplexing and numbering can be performed by placing a sofa in a channel and instructing the timing of outputting data from the channel buffer onto the data bus in a desired manner. The conversion and the transmission order conversion can be performed at the same time, so to speak. By appropriately changing the output timing, it is possible to cope with changes in the system, resulting in excellent flexibility.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle configuration of the present invention, FIG. 2 is a configuration diagram of an embodiment of the present invention, FIG. 3 is an explanatory diagram illustrating processing in a channel allocation control section, and FIG. 4 is a conventional configuration. In the figure, 1 is a highway interface, 6 is a speed conversion buffer, and 10 is a channel buffer. Reference numeral 11 represents a transmission timing control section, 12 a channel allocation control section, 13 an identity generation section, 14 a data bus, and 15 an ID bus.

Claims (1)

[Claims] A plurality of highway interfaces (1) are provided between the terrestrial system and the satellite system, and the signals supplied through each interface (1) are time-division multiplexed. , performs number conversion between the terrestrial time slot number and the satellite burst number,
After converting the transmission order between the satellite burst number order and the burst transmission order, the channel allocation control unit ( 12), a channel buffer (10) provided corresponding to each of the highway interfaces, and an identity generator (10) that instructs the transmission timing to each channel buffer (10). 13), an ID bus (15) for notifying each of the channel buffers of the signal from the identity generation unit (13), and an ID bus (15) for notifying each of the channel buffers of the signal from the identity generation unit (13); It is equipped with a data bus (14) to be collected, a speed conversion buffer (6) that performs speed conversion on the data on the data bus (14), and converts the data on each channel buffer (10) into the data/data bus (14). Bus (1
4) A satellite communication system characterized in that the above-mentioned time division multiplexing, the above-mentioned number conversion, and the above-mentioned transmission order conversion are performed by controlling the timing of output.