RU65703U1 - LOW-ORBIT SYSTEM OF PACKAGE DATA TRANSMISSION AND DISPATCHER TELEPHONY - Google Patents

Abstract

The utility model relates generally to satellite communication systems and, in particular, to a system using satellites of various communication systems having an orbital and terrestrial part, as well as subscriber stations. The technical result to which this utility model is aimed is to simplify the design of the system , specially designed for organizing communication between users using the technical means of the Orbkomm and Gonets systems. The system includes many Microstar spacecraft operating in near-Earth circular orbits and equipped with transceiver complexes in the frequency ranges for communication with ground-based satellite access nodes and subscriber stations, as well as on-board computer complex and service systems, many Gonets spacecraft operating on near-Earth circular orbits and equipped with a multi-channel receiving device in the frequency range, a two-channel transmitting device in the frequency ranges for ides with regional ground stations and subscriber terminals, as well as on-board computer system and office systems. Regional stations are equipped with a transceiver complex in the frequency range for communication with the Gonets spacecraft and communication control systems in the region, many subscriber stations (terminals) that include radio equipment in the frequency ranges for communication with the Microstar and Gonets spacecraft , a computer complex for processing messages and interfacing with external devices, a control and coordination complex connected to satellite access nodes of the Orbcomm system, a global communications control system ue and regional stations of the "Messenger" system.

Description

The utility model relates generally to hybrid satellite communication systems, namely to a system using satellites of various communication systems having an orbital and terrestrial part, as well as subscriber stations (terminals).

A wide variety of systems are known using artificial Earth satellites. Through methods using satellites, cellular telephone services are extended to the most remote areas of the Earth, providing many subscribers access to various telephone services. These satellite systems can be regional communications systems with geostationary orbits (GSO) (GSO), or global communications systems with non-geostationary orbits (non-GSO) (NGSO). As two examples of satellite systems with non-GSO, Iridium TM and Globalstar TM systems, which can be called GMSS Global Satellite Mobile Communications Systems, can be cited.

A communication system is known comprising a first satellite communication system providing broadcast services in a ground service area, a second satellite communication system providing two-way communication services, at least in part of this land service area, a two-way communication line between said first satellite communication system and said second satellite communication system, a user terminal comprising a transceiver for implementation through said second satellite communication system requests for broadcast services, further comprising a receiver for receiving requested broadcast services through

said first satellite communications system (patent RU 2192095). This system is notable for its design complexity, which leads to insufficient flexibility and reduced reliability.

Known space system "Messenger" - a system of global personal satellite communications and data transmission, operating on the basis of low-orbit spacecraft and small subscriber terminals, with a distributed network of regional earth stations.

Scopes of the "Messenger" system:

- Creation of departmental, corporate and administrative communication networks;

- monitoring the status and location of mobile vehicles;

- environmental monitoring, collection of scientific information (geodetic, hydrological, meteorological, etc.);

- industrial monitoring, monitoring the state of the electric power infrastructure, gas and oil pipelines;

- Providing communications in remote regions with undeveloped infrastructure (Far North, Siberia, Far East, etc.);

- communication in emergency situations (earthquakes, floods, environmental and industrial disasters).

The general schemes for creating mobile communications in Russia with federal standards GSM-900 and NMT-450, system projects for global satellite communications of the Russian segment GLOBALSTAR, IRIDIUM, ORBKOM, ISO were developed.

The technical result, which this utility model aims to achieve, is to simplify the design of the system, specially designed for organizing communication between users using the technical means of the Orbkomm and Gonets systems.

The technical result is achieved by the fact that the low-orbit packet data and dispatch telephone communication system includes

a lot of Microstar spacecraft of the Orbcomm system, each of which operates in a near-Earth circular orbit and is equipped with transceiver complexes connected to the onboard computer complex operating in the frequency bands F1 and F2 and providing communication with terrestrial satellite access nodes that also contain transceiver complexes operating in the frequency ranges F1 and F2, and subscriber stations, many spacecraft "Gonets", each of which operates in a low Earth circular orbit and contains um receiving and transmitting devices connected to the on-board computer complex operating in the frequency ranges F3 and F4 and providing communication with regional ground stations and subscriber stations, a global communication control system associated with regional stations, each of which is equipped with a transmitting and transmitting complex in the frequency range F3 and F4 for communication with the “Gonets” spacecraft and a communication control system in the region, while each of the many subscriber stations is equipped with radio transceiver by means of operating in the ranges F1 and F2 and radio transceiver means operating in the ranges of F3 and F4, and the system includes a control and coordination complex connected to the satellite access nodes of the Orbcomm system, the global communications control system and regional stations of the " The messenger ”and equipped with automated workstations for solving the problems of planning distribution of connected resources, input and output from the subscriber system, organization of the billing system.

The graphic materials present a structural diagram of a low-orbit packet data transmission system and telephone dispatch control.

The system includes many Microstar 1 spacecraft operating in near-Earth circular orbits and equipped with 1.1 transceiver complexes in the frequency bands F1 and F2 for communication with

satellite access ground nodes 2 and subscriber stations 3, as well as on-board computer complex 2.1 and service systems 3.1, many Gonets spacecraft 4 operating in near-Earth circular orbits and equipped with multi-channel receiving device 4.1 in the frequency range F3 and F4, two-channel transmitting device 4.2 in the frequency ranges F3 and F4 for communication with ground regional stations 5 and subscriber stations 3, as well as on-board computer complex 4.3 and service systems 4.4. The satellite access nodes 2 are equipped with 2.1 transceiver complexes in the frequency ranges F1 and F2 for communication with Microstar spacecraft and the communication control system 2.2 in the region. Regional station 5 is equipped with a 5.1 transceiver complex in the frequency range F3 and F4 for communication with the “Gonets” spacecraft and the 5.2 communication control system in the region. Many subscriber stations 3 (terminals) include radio equipment in the frequency ranges F1, F2 (3.1) F3 and F4 (3.2), respectively, for communication with the spacecraft "Microstar" and "Messenger". The management and coordination complex 6 is connected to the satellite access nodes 2 of the Orbcomm system, the global communications management system 5 and the regional stations 4 of the Gonets system, and is equipped with automated workstations for solving the problems of planning and distribution of connected resources, input and output of subscribers from the system, organization of a billing system, as well as pairing of communication systems “Orbkomm” and “Messenger”.

The system operates as follows.

When the Microstar spacecraft (SC) enters the radio visibility zone of the ground subscriber station, the latter generates and sends a request for organizing a communication channel for transmitting a message on one of the frequencies of the F1 range. The spacecraft receives, reformatts, and broadcasts on one of the frequencies of the F2 band a request for a transceiver complex of a satellite access node (DRC). The DRC communication management system receives the request and generates a task for the subscriber station to transmit the message,

including the time interval of the subscriber station, the frequency of the channel range F1, the number of packets and the amount of transmitted packets. The generated task at one of the frequencies of the F1 range is transmitted through the transceiver complex to the spacecraft, where it is converted and transmitted to the subscriber station at one of the frequencies of the F2 range. After receiving the job, the subscriber station transmits the first message packet to the spacecraft in the F1 range. The spacecraft receives, reformatts, and transmits it at one of the frequencies of the F2 band to the DRC, which, upon successful receipt of the packet, generates a confirmation and permission to transmit the next packet. The indicated information at one of the frequencies F1 is transmitted to the spacecraft and then in the range F2 to the subscriber station. Similarly, the subscriber station transmits to the DRC the remaining message packets. After successfully receiving the last message packet, the DRC forms a complete message. If the recipient of the message is a public network subscriber, then the DRC will convert it to the appropriate format for transmission over public networks and send it to the recipient. If the recipient of the message is a subscriber station located in the zone of responsibility of this DRC, then the process of transmitting information is similar to the process of sending a message from a subscriber station to the DRC.

When the spacecraft “Gonets” enters the radio-visibility zone of the ground-based subscriber station, the latter generates and sends a request for access to communication channels at one of the frequencies of the F3 range, including the recipient’s address, the required time resource, and information transfer speed. The on-board computer system analyzes the applications received and, if there is a connected resource at one of the frequencies of the F4 band, gives permission to transmit a message, including the operating frequency of the F3 band and the time interval. At the beginning of the allocated time interval, packet transmission of the message through the multi-channel spacecraft receiving device begins, which in real time enters the on-board computer complex for checking for reliability and correcting possible errors. Next, the first package

is converted and transmitted through a transmitting device at one of the frequencies of the F4 range to a subscriber station of the recipient. If it is necessary to transmit a message to the public space network of the spacecraft, the packet is received by the regional station located in the radio visibility zone. The communication control system in the region of the regional station converts the packet into the required format and transmits it to the appropriate communication channel. The procedure for transmitting subsequent packets is similar to the technology for transmitting the first packet described above. Based on the results of the analysis of the reliability of the packets transmitted from the subscriber station to the spacecraft, the on-board computer complex either generates a receipt for a successful communication session for the sender subscriber station, or generates a request for the transmission of distorted packets. After receiving the last packet, the subscriber station of the recipient analyzes the reliability of the packets and corrects the errors. In case of unreliable reception of any packets, the recipient's subscriber station generates a request for the transmission of distorted packets from the spacecraft. Upon successful reception of the message, the subscriber station of the recipient issues a receipt aboard the spacecraft, after which the transmitted message is deleted from the main memory of the IAC.

The communication technology described above is valid for subscriber stations of the sender and receiver located in the same radio visibility zone of the spacecraft. When the sender and the recipient are in different zones, the message transmitted by the sender is received by the regional station located in the same zone as the sender and transmitted via land or other channels to the regional station located in the same zone as the receiver of the message. When the spacecraft appears in their radio visibility zone, a message is transmitted from the regional station to the subscriber station of the recipient. The message transfer technology for this case is similar to that described above.

The global communications management system provides long-term planning of the time-frequency resource of the orbital and ground regional stations, as well as calculates the optimal route

delivery of information using regional stations.

The coordination and management complex interacts with satellite access nodes of the Orbcom system, the global network management system and regional stations of the Gonets system on the inclusion and exclusion of subscribers from the respective networks, billing, maintaining a database of system subscribers, and also monitors the status of technical USD facilities and regional stations. In addition, the coordination and management complex provides interconnection of the Orbcomm and Gonets systems in order to increase the efficiency of information delivery between subscribers located in the areas of responsibility of various satellite access nodes and regional stations.

Claims (1)

Low-orbit packet data and dispatch telephone communications system, including many Microstar spacecraft of the Orbcomm system, each of which operates in a near-Earth circular orbit and is equipped with receiving-transmitting complexes associated with the onboard computer complex operating in the frequency ranges F1 and F2 and providing communication with terrestrial satellite access nodes, also containing transceiver complexes operating in the frequency ranges F1 and F2, and subscriber stations, many space “Gonets” spacecraft, each of which operates in a near-Earth circular orbit and contains transmitting and receiving devices connected to the on-board computer complex operating in the frequency ranges F3 and F4 and providing communication with regional regional stations and subscriber stations, a global communications control system connected with regional stations, each of which is equipped with a transceiver complex in the frequency range F3 and F4 for communication with “Gonets” spacecraft and a communication control system in the region e, while each of the many subscriber stations is equipped with radio transceiver means operating in the ranges F1 and F2 and radio transceiver means operating in the ranges F3 and F4, and the system includes a control and coordination complex connected to the satellite access nodes of the Orbcomm system ", A global communications management system and regional stations of the Gonets system and equipped with workstations for solving planning and distribution tasks by connected resources, input and output from the subscriber system, organization of the billing system.