RU2575647C1 - Method of optimising distribution of user traffic by spacecraft of orbital constellation of satellite communication system - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: optimisation is carried out through more accurate accounting for the state of each spacecraft (SC) of an orbital constellation to determine potential capabilities thereof for the intended number of served users. To this end, each SC_i of the orbital constellation determines parameters of the on-board electric power supply system (e.g. output power W_i) and parameters of the on-board temperature control system (e.g. temperature in the electric power supply system T_i). The method includes, for each SC, determining a relative coefficient of the possible load (number of possible served ground-based user stations N_i) by placing current values of the parameters into mutual correspondence (W_i, T_i) ~ N_i and association thereof with the number of served user stations N on the orbital constellation (e.g. in the table form or functionally). All parameters and values of the coefficients are specified by the designers of the space system and the satellite communication system overall. The possible number of ground (sea, aerial) user stations served by each spacecraft is selected proportionally taking into account the total number of user stations N and the relative coefficient of the possible load N_i. A signal on the possible number of served user stations from each spacecraft of the orbital constellation is transmitted to a control system and a consumer system for scheduling user traffic taking into account the possible load of each spacecraft.

EFFECT: high capacity of the system due to the optimisation of the distribution of user traffic between spacecraft of an orbital constellation of a satellite communication system.

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Description

The invention relates to information transmission systems and may find application in satellite communication systems.

Currently, information is transmitted in a network with terrestrial and space subscribers taking into account the state of spacecraft (patent No. 2070738, Kravets VG and other fundamentals of spacecraft control. M: Engineering. 1983, p.175-184).

Closest in technical essence to the proposed invention is the "Automated control system for the communications complex" (see. Low-orbit space system for personal satellite communication and data transfer. Publishing House Yulisa, 2011, p. 68-69) ", which provides the formation of transmission traffic communications taking into account the state of spacecraft (SC) of the orbital group (OG). The disadvantage of this method is the unsatisfactory throughput of the system as a whole due to the relatively rough accounting of the state of each spacecraft exhaust gas (serviceable - faulty) when planning subscriber traffic. The technical problem solved by the proposed invention is to increase the throughput of the system as a whole by optimizing the distribution of subscriber traffic between the spacecraft of the satellite communications system and extending the active life of the spacecraft by saving on-board resources.

Optimization is carried out by more accurately taking into account the state of each exhaust gas spacecraft to determine its potential capabilities according to the estimated number of subscribers served. To do this, on each spacecraft _i exhaust gas, the parameters of the on-board power supply system (for example, the output power W _i ) and the parameters of the on-board temperature control system (for example, the temperature in the power supply system T _i ) are determined.

For each spacecraft, the relative coefficient of the possible load (the number of possible service of ground subscriber stations N) is determined, setting the current values of the parameters (W _i , T _i ) ~ N _i in correlation and referring it to the total number of serviced subscriber stations N by orbital grouping (for example , is set table or functionally). All parameters and coefficient values are set by the developers of the space complex and the satellite system as a whole.

The possible number of ground (sea, air) subscriber stations serviced by each spacecraft is selected proportionally taking into account the total number of subscriber stations N and the relative coefficient of possible load N _i .

A signal about the possible number of serviced subscriber stations from each exhaust gas spacecraft is sent to the control complex and to the consumer complex to plan subscriber traffic, taking into account the possible load of each spacecraft.

In FIG. 1 presents a possible implementation scheme of the proposed method, where

1 - control complex;

2 - logical block;

3 - block comparators;

4 - on-board power supply system;

5 - on-board thermal control system;

6 - consumer complex.

On board each spacecraft of the system, the signals W _i from the on-board power supply system (4) and T _i from the on-board temperature control system (5) (from the corresponding sensors) are received in analog form on the comparator units.

The signals from each block of comparators (3) are fed to the input of the logical block (2) (for example, a set of AND elements) and from it to the input of the control block (1), the output of which forms a signal of the relative load factor N _i proportional to the ratio of W _i and T _i .

Ni signals from each spacecraft arrive at the consumer complex of the ground-based special complex. At the output of the consumer complex traffic plans P _{i are formed} , proportional to the input N _i .

Thus, a more accurate account of the current parameters of the on-board power supply and temperature control systems allows you to adapt the process of planning subscriber traffic in the system to the state of the parameters of the power supply system and the temperature control system of each exhaust gas spacecraft. The capabilities of the radio line of each spacecraft to transmit messages are determined by the values of current parameters W _i , T _i . This provides increased throughput of the satellite communications system.

Claims (1)

A method for optimizing the distribution of subscriber traffic in a satellite communication system, consisting of an orbital constellation of spacecraft equipped with on-board power supply and temperature control systems, characterized in that in the process of distributing subscriber traffic on each spacecraft, the current parameters of the on-board power supply system and on-board temperature control system are determined, as well as the relative coefficient of the possible load and determine the specific value of the mutual correspondence of current values parameters of power supply and temperature control systems and correlate this value with the general scale of subscribers serviced by the orbital constellation, as well as the possible number of serviced ground subscriber stations by each spacecraft of this group and based on these data on each spacecraft generate a proportional signal to the control and consumer systems for planning subscriber traffic, taking into account the possible loading of each spacecraft.

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