JPH06112873A - Satellite multiplex control method - Google Patents

Abstract

PURPOSE:To reduce data quantity and to set a satellite line efficiently by sending a head TDMA burst location and a TDMA burst number when the setting of the satellite line is commanded to a slave station making communication. CONSTITUTION:n-Sets of TDMA bursts provided with numbers 1 to n form a TDMA frame and the signal is set by using the TDMA bursts 2 to 8 whose frequency number is 1. A frequency number F1 whose transmission frequency number is set to 1 is designated to set a head burst number to be 2 and to designate it that a head burst in a frame is B2 and a burst number 7 is set to designate it that 7 bursts B2 to B8 are used. The bursts are used consecutively for one frame. The information quantity to be sent is reduced by sending the head burst number and the burst number to designate the burst location of signal transmission and reception.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite line control method for managing the state of an earth station and allocating a satellite line to the earth station in a satellite communication system comprising a reference station and a plurality of earth stations. .

[0002]

2. Description of the Related Art A block diagram of a TDMA satellite communication system is shown in FIG. The system is composed of a communication satellite 1, a reference station 2 that manages the use status of the satellite line and allocates the satellite line, and a plurality of slave stations 3 that perform communication. When the base station 2 receives the satellite line connection request, it secures an unused satellite line and uses the control line between the base station and the slave stations to transmit a satellite line setting instruction to the transmitting / receiving station. The transmitting station receiving the instruction transmits a signal to the instructed TDMA burst position, and the receiving station receives the signal transmitted to the instructed TDMA burst position. FIG. 5 shows a satellite circuit setting instruction signal format transmitted from a reference station to a slave station in the prior art. In the prior art, TD for transmitting and receiving signals
The position of the MA burst is indicated by transmitting the TDMA burst number assigned to each TDMA burst. Therefore, when the signal to be transmitted is high-speed and requires a plurality of TDMA bursts, it is necessary to transmit the number of bursts using the block of the signal shown in FIG. 5, and a large amount of data is transmitted, so that the throughput decreases. Has the drawback of

[0003]

As described above, in the conventional satellite channel control method, the satellite channel setting instruction signal is TD.
Since it is composed of blocks for each MA burst, there is a drawback that the amount of data of the satellite line setting instruction signal at the time of transmitting a high-speed signal becomes large, the throughput is lowered, and the satellite line cannot be efficiently allocated. .

An object of the present invention is to improve line throughput in a demand communication system in TDMA satellite communication.

[0005]

A feature of the present invention is that it comprises a reference station that manages the use status of a satellite line and allocates the satellite line, and a plurality of slave stations that communicate using the satellite line. In a TDMA satellite communication system that uses a divided burst as a satellite line, in the satellite line control method in which the reference station allocates a satellite line to the slave station in response to the generation of a demand, the reference station sends a TDMA burst to the slave station. The frame format of the setting instruction signal for indicating the position of the TDMA is the start TDMA burst number associated with the slave station in the frame and the TDMA.
It is to include a block consisting of burst numbers.

[0006]

In the above structure, when allocating a satellite line,
Assign multiple bursts in one frame format. Therefore, the throughput of the line is improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a satellite line setting instruction format according to an embodiment of the present invention. The satellite line setting instruction format is composed of a header, a transmission or reception frequency number, a head burst number, a burst number, a terrestrial interface number, and a terrestrial interface time slot number. TD
An example of using the TDMA burst in MA communication is shown in FIG. Here, n Ts assigned numbers 1 to n
A DMA burst constitutes a TDMA frame. In this embodiment, TDMA bursts 2 to 8 of frequency number 1
Since the signal is transmitted by using the above, the reference station transmits the signal as shown in FIG. 4 to the transmitting / receiving station. Here, the frequency number of F1 is designated as the transmission frequency number = 1, the head burst number = 2, and the head burst in the frame is B2.
Is specified, and the number of bursts is 7, and B2 to B8
Specifies to use 7 bursts of. Bursts are used consecutively within one frame. In this manner, the amount of information to be transmitted is reduced by transmitting the head burst number and the number of bursts and designating the burst positions for transmitting and receiving signals. According to this method, the satellite line can be set with the same amount of data regardless of whether the communication is performed using a plurality of TDMA bursts or a single TDMA burst. You can often allocate satellite lines.
This method is particularly effective when TDMA bursts are collectively secured.

[0008]

As described above, the present invention transmits a high-speed signal by transmitting the head TDMA burst position and the number of TDMA bursts when instructing a satellite channel setting instruction to a slave station communicating in satellite communication. The data amount of the satellite line setting information in the case of transmission is reduced, the throughput is improved, and the satellite line can be set efficiently.

[Brief description of drawings]

FIG. 1 shows a format of a satellite line setting instruction signal according to the present invention.

FIG. 2 shows a block diagram of a satellite communication system.

FIG. 3 is a usage example of a TDMA burst.

FIG. 4 is an example of a satellite line setting instruction signal in the present invention.

FIG. 5 is a satellite channel setting instruction signal format in the prior art.

[Explanation of symbols]

 1 Communication satellite 2 Reference station 3 Slave station

Claims (1)

[Claims] 1. A satellite station comprising a reference station for managing the satellite channel usage status and allocating the satellite channel, and a plurality of slave stations for communicating using the satellite channel, wherein bursts periodically time-divided are used as the satellite channel. In a TDMA satellite communication system, in a satellite channel control method, wherein the reference station allocates a satellite channel to the slave station in response to a demand, a frame of a setting instruction signal for the reference station to instruct the slave station to position a TDMA burst. A satellite line control method, wherein the format includes a block consisting of a head TDMA burst number related to the slave station in the frame and a TDMA burst number.