JPH01296724A - Satellite exchange control system - Google Patents

Abstract

PURPOSE:To eliminate the need for a memory for switch control and a link for switch control by giving channel number designation information to a preamble part of a burst signal and using an exchange loaded on a satellite based on the information. CONSTITUTION:A ground station 11 sends a burst signal 300 at an assigned time location on an up-link 100, in the reception of a burst signal 300, an exchange 30 on a satellite, a decoding circuit 31 decodes the signal into a digital signal, it is demultiplexed by a preamble part data part demultiplex circuit 32, and the data part 320 is an input data of a time division switch memory write circuit 34. On the other hand, a channel number designation information 312 of the preamble part is inputted to a channel number storage circuit 33, the output of the channel number storage circuit 33 is the input address of a time division switch memory write circuit 34, and the data of the data part 320 is written in the time division switch memory 36. Thus, the memory for switch control and the link for switch control are not required.

Description

DETAILED DESCRIPTION OF THE INVENTION 1. Field of Industrial Application The present invention relates to a satellite exchange control system using a multi-beam system, and more particularly to a satellite exchange control system for an exchanger mounted on a satellite.

[Conventional technology]

In a multi-beam satellite communication system, communication between ground stations in different regions using beams requires beam switching via a switch mounted on the satellite. In addition, when multiple ground stations with TDMA functions in each beam region communicate via a communication satellite, the uplink side (from the earth station to the satellite) is It is output at the time position assigned to the station.This parse 1~ signal is composed of a preamble part and a data part.The preamble part contains information for synchronization detection.The subsequent data part is the Depending on the time position of the burst signal to which it belongs, the address of the time-sharing switch memory of the exchange on board the satellite is determined and stored at that address.The downlink l1l (direction from the satellite to the ground station) is carried out on the satellite. The data is retrieved from the memory of the time-division switch of the exchange that has been transferred, and the data part is sent to the ground station in a continuous manner for each beam.The beam change instruction is performed by the switch control of the exchange installed on the satellite. The switch control is performed by sending switch control information from the ground station using a separately provided switch control link.

[Problem that the invention seeks to solve]

The conventional satellite exchange control method described above is not economical and has a high failure rate because it requires a switch control link and a switch control memory to store switch control information in order to control the time-sharing switch mounted on the satellite. There is also the problem that the cost is also high.

An object of the present invention is to include channel number designation information in the preamble part of a burst signal, and exchange this information with an exchanger installed on a satellite, thereby connecting memory for switch control and link for switch control. The object of the present invention is to provide a satellite exchange control system that does not require installation.

[Means for solving problems]

The satellite exchange control method of the present invention is a satellite exchange control method in which a ground station sends a burst signal consisting of a preamble part and a data part to an uplink, and the preamble part of the burst signal sent by the ground station is assigned a channel. a decoding circuit that adds number designation information and decodes the burst signal of the uplink to an exchange mounted on a satellite; a preamble/data separation circuit that separates the preamble section and the data section; and the preamble section. a channel number holding circuit that extracts channel number designation information from the timer and holds it until the next 'burst signal is received; a memory write circuit that writes the contents of the data section to the memory of the time division switch using the channel number designation information as an address; The configuration includes a memory readout circuit that reads data stored in the memory of the split switch, and an encoding circuit that encodes the read data and sends it to the downlink.

]One Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

The ground station 11 connects to the ground station 12 via the exchange 30 on the satellite.
This example shows the case where data is sent to

The ground station 11 sends a burst signal 30 to the uplink 100.
Sends 0. The exchange 30 on the satellite is the downlink 2
A data signal 400 is sent to 00.

FIG. 2 is a signal configuration diagram showing the configuration of a burst signal 300 on the uplink 100.

The burst signal 300 consists of a preamble section 310 and a data section 320. Further, the preamble section 310 is further divided into synchronization detection information 311 and channel number designation information 312.

FIG. 3 is a signal configuration diagram showing the configuration of a data signal 400 on the downlink 200.

The data signal 400 is a continuous signal, and consists of synchronization detection information 411 provided for each frame, and a data section 420 containing a plurality of data. The data section 420 contains 1.・・・・・・、i、・・・・・・
. , n data signals are included.

Next, the operation will be explained mainly with reference to FIG.

□ The ground station 11 sends out a burst signal 300 at an assigned time position on the uplink 100.

At this time, channel number designation information 3 of the burst signal 300
12 indicates the memory storage address of the time division switch on the satellite, and is also the channel number received by the ground station 12 on the downlink 200. Therefore, the ground station 11 sets the channel number received by the ground station 12 as the value of the channel number designation information 312.

When the exchange 30 on the satellite receives the burst signal 300, it is decoded into a digital signal by the decoding circuit 31, and separated by the preamble part/data part separation circuit 32. This becomes input data for the circuit 34. On the other hand, the channel number designation information 312 in the preamble portion is input to the channel number holding circuit 33. The output of the channel number holding circuit 33 becomes the input address of the memory write circuit 34 of the time division switch. Thereby, the data in the data section 320 is written into the memory 36 of the time division switch. Channel number holding circuit 3
3, channel number designation information is set each time a new burst signal is received.

By the method described above, the memory 36 of the time division switch is
Data sent from the earth-E station 11 is stored in the .

The data stored in the memory 36 of the time division switch is read by a memory read circuit 35. The outputs of the circuits 21 to 38, whose values increase by 2, become the read addresses of the memory 36 of the time division switch. By the method described above, the data stored in the memory 36 of the time division switch is sequentially read out, input to the code 1-hi circuit 37, and sent to the downlink 200.

The data of the burst signal 300 sent from the ground station 11 to the uplink 100 is included in the channel number i of the downlink 200. The channel number i is determined by the value of the channel number designation information of the burst signal 300. The ground station 12 receives the Nayai subnumber i if it is the channel number to be received, and the data sent from the ground station 11 reaches the ground station 12.

〔Effect of the invention〕

As explained above, according to the present invention, the preamble section of the burst signal contains the chai/subnumber designation information, and the information is also included in the tA#! ! By replacing with &, there is no need to provide a memory for switch control and a link for switch control, which reduces the number of components on the satellite, making it economical and highly reliable. It has the effect of obtaining.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a signal configuration diagram showing the configuration of a burst signal on the uplink, and FIG. 3 is a signal configuration diagram showing the configuration of a data signal on the downlink. be.

Claims (1)

[Claims] In a satellite exchange control method in which a ground station sends a burst signal consisting of a preamble part and a data part to the uplink, channel number designation information is added to the preamble part of the burst signal sent by the ground station, and the burst signal is sent to the satellite. The installed exchange includes a decoding circuit that decodes the burst signal of the uplink, a preamble/data separation circuit that separates the preamble part and the data part, and extracts channel number designation information from the preamble part and decodes the next burst signal. a channel number holding circuit that holds the channel number until a signal is received; a memory write circuit that writes the contents of the data section into the memory of the time division switch using the channel number designation information as an address; and a memory write circuit that reads the data stored in the memory of the time division switch. A satellite exchange control system comprising: a memory readout circuit; and an encoding circuit that encodes the read data and sends it to a downlink.