CN113078941B - Airborne communication system and method with relay function - Google Patents
Airborne communication system and method with relay function Download PDFInfo
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- CN113078941B CN113078941B CN202110335846.0A CN202110335846A CN113078941B CN 113078941 B CN113078941 B CN 113078941B CN 202110335846 A CN202110335846 A CN 202110335846A CN 113078941 B CN113078941 B CN 113078941B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
- H04B7/18504—Aircraft used as relay or high altitude atmospheric platform
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
- H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
- H04B7/18508—Communications with or from aircraft, i.e. aeronautical mobile service with satellite system used as relay, i.e. aeronautical mobile satellite service
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses an airborne communication system with a relay function and a method thereof, comprising a plurality of airborne subsystems positioned on different airplanes; the airborne subsystem comprises an airborne communication device, a first coupler, an airborne antenna, an abdominal communication device, a second coupler, an abdominal antenna, a first relay device, a second relay device, an airborne transceiver device and a relay antenna; the first coupler is connected with the back antenna, the second coupler is connected with the belly antenna, and the airborne transceiver is connected with the relay antenna. The invention can provide an additional communication channel by using the relay channel of other airplanes, and enhance the strength of the communication signal so as to ensure the communication access or speed of the airplane under special conditions.
Description
Technical Field
The present invention relates to communications for airborne devices, and in particular, to an airborne communication system and method with a relay function.
Background
Common aircraft communication devices have a back-mounted, e.g., L, ku, ka satellite communication system, and a belly-mounted, e.g., ATG (including 3G/4G/5G), communication access or rate may not meet standards under special circumstances; for example, in rainy days, an airplane equipped with a satellite communication device in the Ka band communicates with a satellite independently, and the airplane may not be able to communicate with the satellite due to excessive rain attenuation, which causes inconvenience to the communication of the airplane.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an airborne communication system with a relay function and a method thereof, which can provide an additional communication channel by means of relay channels of other airplanes and enhance the strength of communication signals so as to ensure the communication access or speed of the airplanes under special conditions.
The purpose of the invention is realized by the following technical scheme: an airborne communication system with relay function comprises a plurality of airborne subsystems located on different airplanes;
the airborne subsystem comprises an airborne communication device, a first coupler, an airborne antenna, an abdominal communication device, a second coupler, an abdominal antenna, a first relay device, a second relay device, an airborne transceiver device and a relay antenna; the first coupler is connected with a machine back antenna, the second coupler is connected with a machine belly antenna, and the airborne transceiver is connected with a relay antenna;
the input end of the first relay device is connected with the second coupler, the output end of the first relay device is connected with the first coupler, the input end of the second relay device is connected with the first coupler, the output end of the second relay device is connected with the second coupler, the output ends of the back communication device and the belly communication device are both connected with the relay control device, the output end of the relay control device is respectively connected with the first relay device and the second relay device, and the relay control device is further connected with the airborne transceiver device;
the machine back communication equipment is used for establishing connection with a communication satellite through the first coupler and the machine back antenna and sending a relay request to the relay control equipment when an uplink signal of the communication satellite is degraded;
the belly communication equipment is used for establishing connection with a ground communication station through a second coupler and a belly antenna and initiating a relay request to the relay control equipment when a downlink signal of the ground communication station is degraded;
the relay control equipment is used for receiving relay requests from the back-of-plane communication equipment and the belly communication equipment and sending communication satellites, wave beams, channel parameters and relay requests of corresponding equipment through airborne transceiving equipment and an airborne antenna when receiving the relay requests; and the information from other airplanes is received through the airborne transceiver and the airborne antenna, and the control on the first relay module and the second relay module is not completed after the analysis.
Further, the first relay device comprises a first filter, a first relay switch and a first power amplifier, wherein the input end of the first filter is connected with the second coupler, the output end of the first filter is connected with the first coupler sequentially through the first relay switch and the first power amplifier, and the control input end of the first relay switch is connected with the relay control device;
the first power amplifier is a variable gain power amplifier, and the control input end of the first power amplifier is connected with the relay control equipment.
The second relay equipment comprises a second filter, a second relay switch and a second power amplifier, the input end of the second filter is connected with the first coupler, the output end of the second filter is connected with the second coupler through the second relay switch and the second power amplifier in sequence, and the control input end of the second relay switch is connected with the relay control equipment;
the second power amplifier is a variable gain power amplifier, and the control input end of the second power amplifier is connected with the relay control equipment.
Further, the relay control module includes:
the transmitting module is used for generating an L value when receiving relay requests from the set-back communication equipment and the set-belly communication equipment, and sending the communication satellite, the wave beam, the channel parameter, the relay request and the corresponding L value as relay information;
a receiving module: monitoring relay information of other airplanes, and analyzing a relay request and a corresponding L value;
a random number generation module: outputting a random number through a random number generating program according to the L value analyzed by the receiving module, and judging whether to output a command for continuing relaying or not according to the random number;
the receiving processing module is used for receiving the relay requests of other airplanes after the random number generating module outputs the command of continuing the relay, then decoding the communication satellites, the wave beams and the channel parameters of the relay requests of other airplanes, if the communication satellites, the wave beams and the channel parameters of the other airplanes do not conflict with the communication wave beams and the channel parameters of the airplane, turning on the first relay switch or the second relay switch for relay, and setting the gain to be in an automatic gain mode by the gain control module;
the transmitting module is used for transmitting a relay setting success command to the airplane which transmits the relay request after the relay is opened;
and the gain control module is used for carrying out communication test with the airplane sending the relay request, if the communication cannot be carried out normally, a gain increase control request command is sent, the gain control module reads the power value of the current automatic gain control, and the relay amplification factor is increased to the maximum by controlling the first power amplifier or the second power amplifier.
Further, the L value is determined as follows:
setting the number of airplanes capable of providing relays as n, and if the number of airplanes capable of providing relays is less than or equal to K, L =1; when the number of airplanes capable of providing relays n > K, L = n/K;
where K represents the desired trunk channel, as estimated by the aircraft's communication link conditions, e.g., current rate is m bps, if the desired rate is D x m bps, then K x D.
Further, the random number generation module outputs the command whether to relay through the random number generation program as follows:
an integer in the interval [1, L ] is randomly generated by a random number generation program, if the generated integer is 1, a command to continue relaying is output, and if the generated integer is not 1, the command to continue relaying is not output.
An airborne communication method with a relay function comprises a normal communication step S1, an uplink relay communication step S2 and a downlink relay communication step S3:
the normal communication step S1 includes:
the airplane back communication equipment of each airplane is communicated with the airplane back satellite through the first coupler and the airplane back antenna; the ventral communication device of each aircraft communicates with the ground communication station through a coupler and a ventral antenna;
the uplink relay communication step S2 includes:
s201, when the machine back communication equipment of any airplane A in the system finds that the uplink communication quality is poor, a relay request is sent to relay control equipment of the airplane A;
s202, when a relay control device in the airplane A receives a relay request from a machine back communication device, generating an L value, and sending a communication satellite, a wave beam, a channel parameter, the relay request and the corresponding L value of the machine back communication device as relay information through an airborne transceiver device;
s203, after relay control equipment in any airplane B above the airplane A in the system receives relay information of the airplane A through airborne transceiver equipment, decoding a communication satellite, a wave beam, a channel parameter, a relay request and a corresponding L value of airplane back communication equipment of the airplane A;
s204, the relay control equipment in the airplane B judges whether to output a command of continuing relay according to the L value:
if yes, go to step S205;
if not, the relay is stopped;
s205, the relay control device in the airplane B judges whether the decoded information meets the following conditions: the decoded information is the same as the communication satellite and the wave beam of the airplane back communication equipment of the airplane B, and the channel does not conflict with the airplane B;
if yes, the relay control device of the aircraft B turns on a first relay switch of the aircraft B, and the step S206 is carried out;
if not, keeping the relay switch of the airplane B in a closed state;
s206, receiving satellite signals from the aircraft A by the aircraft B from the aircraft belly antenna, coupling the satellite signals through the second coupler, connecting the satellite signals to a coupler connected with the aircraft back antenna through the first relay module, and sending the satellite signals to a communication satellite through the aircraft back antenna;
s207, the relay control device of the airplane B takes the communication satellite, the wave beam, the channel parameter and the relay success signal of the airplane back communication device of the airplane A as relay success feedback information and sends the relay success feedback information through the airborne transceiver device;
and S208, after receiving the relay success feedback information of the airplane B through the airborne transceiver, the relay control equipment in the airplane A counts the airplane back communication equipment of the airplane A within the time T to find the uplink communication quality, if the uplink communication quality is good, other information is not sent, if the uplink communication quality is not good, a relay unlocking requirement is sent, and after receiving the relay unlocking requirement, the airplane B disconnects the relay module.
The downlink relay communication step S3 includes the following substeps:
s301, when finding that the uplink communication quality is poor, the belly communication equipment of any airplane A in the system sends a relay request to the relay control equipment of the airplane A;
s302, when a relay control device in the airplane A receives a relay request from an abdomen communication device, generating an L value, and sending a communication ground station, a wave beam, a channel parameter, the relay request and the corresponding L value of the abdomen communication device as relay information through an airborne transceiver;
s303, after relay control equipment in any airplane C below the airplane A in the system receives relay information of the airplane A through airborne transceiver equipment, decoding a communication ground station, a wave beam, a channel parameter, a relay request and a corresponding L value of belly communication equipment of the airplane A;
s304, the relay control device of the airplane C judges whether to output a command of continuing relay according to the L value:
if yes, go to step S305;
if not, the relay is stopped;
s305, the relay control equipment in the airplane C judges whether the decoded information meets the following conditions: the decoded information is the same as the communication ground station and the wave beam of the belly communication equipment of the airplane C, and the channel does not conflict with the airplane C;
if yes, the relay control device of the airplane C turns on a second relay switch of the airplane C, and the step S306 is carried out;
if not, keeping the relay switch of the airplane C in a closed state;
s306, the aircraft C receives a ground station communication signal from the aircraft A from a back antenna, is coupled through a first coupler, is connected to a second coupler connected with an abdomen antenna through a second relay module, and is sent to the ground communication station through the abdomen antenna;
s307, the relay control device of the airplane C takes the communication ground station, the wave beam, the channel parameter and the relay success signal of the belly communication device of the airplane A as relay success feedback information and sends the relay success feedback information through the airborne transceiver device;
s308, after the relay control device in the airplane A receives the relay success feedback information of the airplane C through the airborne transceiver device, counting the belly communication device of the airplane A within T time to find the uplink communication quality, if the uplink communication quality is good, not sending other information, if the uplink communication quality is not good, sending a relay unlocking request, and after the airplane C receives the relay unlocking request, disconnecting the relay module.
The beneficial effects of the invention are: the invention can provide an additional communication channel by using the relay channel of other airplanes, and enhance the strength of the communication signal so as to ensure the communication access or speed of the airplane under special conditions.
Drawings
FIG. 1 is a schematic block diagram of the system of the present invention;
FIG. 2 is a flow chart of the method of the present invention.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1, an airborne communication system with relay function includes a plurality of airborne subsystems located on different airplanes;
the airborne subsystem comprises an airborne communication device, a first coupler, an airborne antenna, an abdominal communication device, a second coupler, an abdominal antenna, a first relay device, a second relay device, an airborne transceiver and a relay antenna; the first coupler is connected with a machine back antenna, the second coupler is connected with a machine belly antenna, and the airborne transceiver is connected with a relay antenna;
the input end of the first relay device is connected with the second coupler, the output end of the first relay device is connected with the first coupler, the input end of the second relay device is connected with the first coupler, the output end of the second relay device is connected with the second coupler, the output ends of the back communication device and the belly communication device are both connected with the relay control device, the output end of the relay control device is respectively connected with the first relay device and the second relay device, and the relay control device is further connected with the airborne transceiver device;
the machine back communication equipment is used for establishing connection with a communication satellite through the first coupler and the machine back antenna and sending a relay request to the relay control equipment when an uplink signal of the communication satellite is degraded;
the belly communication equipment is used for establishing connection with a ground communication station through a second coupler and a belly antenna and initiating a relay request to the relay control equipment when a downlink signal of the ground communication station is degraded;
the relay control equipment is used for receiving relay requests from the back-of-plane communication equipment and the belly communication equipment and sending communication satellites, wave beams, channel parameters and relay requests of corresponding equipment through airborne transceiving equipment and an airborne antenna when receiving the relay requests; and the information from other airplanes is received through the airborne transceiver and the airborne antenna, and the control on the first relay module and the second relay module is not completed after the analysis.
Further, the first relay device comprises a first filter, a first relay switch and a first power amplifier, wherein the input end of the first filter is connected with the second coupler, the output end of the first filter is connected with the first coupler sequentially through the first relay switch and the first power amplifier, and the control input end of the first relay switch is connected with the relay control device;
the first power amplifier is a variable gain power amplifier, and the control input end of the first power amplifier is connected with the relay control equipment.
The second relay equipment comprises a second filter, a second relay switch and a second power amplifier, the input end of the second filter is connected with the first coupler, the output end of the second filter is connected with the second coupler through the second relay switch and the second power amplifier in sequence, and the control input end of the second relay switch is connected with the relay control equipment;
the second power amplifier is a variable gain power amplifier, and the control input end of the second power amplifier is connected with the relay control equipment.
Further, the relay control module includes:
the transmitting module is used for generating an L value when receiving relay requests from the machine back communication equipment and the machine belly communication equipment, and sending a communication satellite, a wave beam, a channel parameter, the relay requests and the corresponding L value as relay information;
a receiving module: monitoring relay information of other airplanes, and analyzing a relay request and a corresponding L value;
a random number generation module: outputting a random number through a random number generating program according to the L value analyzed by the receiving module, and judging whether to output a command for continuing relaying or not according to the random number;
the receiving processing module is used for receiving the relay requests of other airplanes after the random number generating module outputs the command of continuing the relay, then decoding the communication satellites, the wave beams and the channel parameters of the relay requests of other airplanes, if the communication satellites, the wave beams and the channel parameters of the other airplanes do not conflict with the communication wave beams and the channel parameters of the airplane, turning on the first relay switch or the second relay switch for relay, and setting the gain to be in an automatic gain mode by the gain control module;
the transmitting module is used for transmitting a relay setting success command to the airplane which transmits the relay request after the relay is opened;
and the gain control module is used for carrying out communication test with the airplane sending the relay request, if the communication cannot be carried out normally, a gain increase control request command is sent, the gain control module reads the power value of the current automatic gain control, and the relay amplification factor is increased to the maximum by controlling the first power amplifier or the second power amplifier.
Further, the L value is determined as follows:
setting the number of airplanes capable of providing relays as n, and if the number of airplanes capable of providing relays n is less than or equal to K, L =1; when the number of airplanes capable of providing relays n > K, L = n/K;
where K represents the desired relay channel, which is estimated by the communication link conditions of the aircraft, e.g., the current rate is m bps, if the desired rate is D x m bps, then K ≈ D.
Further, the manner of the random number generation module outputting the command whether to relay through the random number generation program is as follows:
an integer in the interval [1, L ] is randomly generated by a random number generation program, if the generated integer is 1, a command to continue relaying is output, and if the generated integer is not 1, the command to continue relaying is not output.
As shown in fig. 2, an airborne communication method with a relay function includes a normal communication step S1, an uplink relay communication step S2, and a downlink relay communication step S3:
the normal communication step S1 includes:
the airplane back communication equipment of each airplane is communicated with the airplane back satellite through the first coupler and the airplane back antenna; the ventral communication device of each aircraft communicates with the ground communication station through a coupler and a ventral antenna;
the uplink relay communication step S2 includes:
s201, when the machine back communication equipment of any airplane A in the system finds that the uplink communication quality is poor, a relay request is sent to relay control equipment of the airplane A;
s202, when a relay control device in the airplane A receives a relay request from a machine back communication device, generating an L value, and sending a communication satellite, a wave beam, a channel parameter, the relay request and the corresponding L value of the machine back communication device as relay information through an airborne transceiver device;
s203, after relay control equipment in any airplane B above the airplane A in the system receives relay information of the airplane A through airborne transceiver equipment (such as existing ADS-B, ATG or 5G transceiver equipment and the like), decoding a communication satellite, a beam, a channel parameter, a relay request and a corresponding L value of airplane back communication equipment of the airplane A;
s204, the relay control equipment in the airplane B judges whether to output a command of continuing relay according to the L value:
if yes, go to step S205;
if not, the relay is stopped;
s205, the relay control device in the airplane B judges whether the decoded information meets the following conditions: the decoded information is the same as the communication satellite and the wave beam of the airplane back communication equipment of the airplane B, and the channel does not conflict with the airplane B;
if yes, the relay control device of the aircraft B turns on a first relay switch of the aircraft B, and the step S206 is carried out;
if not, keeping the relay switch of the airplane B in a closed state;
s206, receiving satellite signals from the aircraft A by the aircraft B from the aircraft belly antenna, coupling the satellite signals through the second coupler, connecting the satellite signals to a coupler connected with the aircraft back antenna through the first relay module, and sending the satellite signals to a communication satellite through the aircraft back antenna;
s207, the relay control device of the airplane B takes the communication satellite, the wave beam, the channel parameter and the relay success signal of the airplane back communication device of the airplane A as relay success feedback information and sends the relay success feedback information through the airborne transceiver device;
and S208, after the relay control device in the airplane A receives the relay success feedback information of the airplane B through the airborne transceiver device, counting the uplink communication quality found by the airplane back communication device of the airplane A within T time, if the uplink communication quality is good, not sending other information, if the uplink communication quality is not good, sending a relay unlocking requirement, and after the airplane B receives the relay unlocking requirement, disconnecting the relay module.
The downlink relay communication step S3 includes the following substeps:
s301, when finding that the uplink communication quality is poor, the belly communication equipment of any airplane A in the system sends a relay request to the relay control equipment of the airplane A;
s302, when a relay control device in the airplane A receives a relay request from an abdomen communication device, generating an L value, and sending a communication ground station, a wave beam, a channel parameter, the relay request and the corresponding L value of the abdomen communication device as relay information through an airborne transceiver;
s303, after relay control equipment in any airplane C below the airplane A in the system receives relay information of the airplane A through airborne transceiver equipment, decoding a communication ground station, a wave beam, a channel parameter, a relay request and a corresponding L value of belly communication equipment of the airplane A;
s304, the relay control device of the airplane C judges whether to output a command of continuing relay according to the L value:
if yes, go to step S305;
if not, the relay is stopped;
s305, the relay control equipment in the airplane C judges whether the decoded information meets the following conditions: the decoded information is the same as the communication ground station and the wave beam of the belly communication equipment of the airplane C, and the channel does not conflict with the airplane C;
if yes, the relay control device of the airplane C turns on a second relay switch of the airplane C, and the step S306 is carried out;
if not, keeping the relay switch of the airplane C in a closed state;
s306, the aircraft C receives a ground station communication signal from the aircraft A from a back antenna, is coupled through a first coupler, is connected to a second coupler connected with an abdomen antenna through a second relay module, and is sent to the ground communication station through the abdomen antenna;
s307, the relay control device of the airplane C takes the communication ground station, the wave beam, the channel parameter and the relay success signal of the belly communication device of the airplane A as relay success feedback information and sends the relay success feedback information through the airborne transceiver device;
s308, after receiving relay success feedback information of the airplane C through the airborne transceiver, the relay control device in the airplane A counts the belly communication device of the airplane A within the time T to find uplink communication quality, if the uplink communication quality is good, other information is not sent, if the uplink communication quality is not good, a relay unlocking request is sent, and after receiving the relay unlocking request, the airplane C disconnects the relay module.
In the embodiment of the present application, the degradation of the communication quality of the uplink and the downlink refers to a case where the error rate does not reach the standard or the modulation order does not reach the standard, and the improvement of the communication quality of the uplink and the downlink refers to a case where neither the error rate nor the modulation order does not reach the standard.
While the foregoing description shows and describes a preferred embodiment of the invention, it is to be understood, as noted above, that the invention is not limited to the form disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and may be modified within the scope of the inventive concept described herein by the above teachings or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. An airborne communication system with a relay function, characterized in that: comprises a plurality of onboard subsystems located on different airplanes;
the airborne subsystem comprises an airborne communication device, a first coupler, an airborne antenna, an abdominal communication device, a second coupler, an abdominal antenna, a first relay device, a second relay device, a relay control device, an airborne transceiver device and a relay antenna; the first coupler is connected with a machine back antenna, the second coupler is connected with a machine belly antenna, and the airborne transceiver is connected with a relay antenna;
the input end of the first relay device is connected with the second coupler, the output end of the first relay device is connected with the first coupler, the input end of the second relay device is connected with the first coupler, the output end of the second relay device is connected with the second coupler, the output ends of the back communication device and the belly communication device are both connected with the relay control device, the output end of the relay control device is respectively connected with the first relay device and the second relay device, and the relay control device is further connected with the airborne transceiver device;
the machine back communication equipment is used for establishing connection with a communication satellite through the first coupler and the machine back antenna and sending a relay request to the relay control equipment when an uplink signal of the communication satellite is degraded;
the belly communication equipment is used for establishing connection with a ground communication station through a second coupler and a belly antenna and initiating a relay request to the relay control equipment when a downlink signal of the ground communication station is degraded;
the relay control equipment is used for receiving relay requests from the back-of-plane communication equipment and the belly communication equipment and sending communication satellites, wave beams, channel parameters and the relay requests of the corresponding equipment through the airborne transceiving equipment and the relay antenna when receiving the relay requests; and receiving information from other airplanes through airborne transceiver equipment and the relay antenna, and not completing the control of the first relay module and the second relay module after analysis.
2. The system according to claim 1, wherein: the first relay equipment comprises a first filter, a first relay switch and a first power amplifier, the input end of the first filter is connected with the second coupler, the output end of the first filter is connected with the first coupler sequentially through the first relay switch and the first power amplifier, and the control input end of the first relay switch is connected with the relay control equipment;
the first power amplifier is a variable gain power amplifier, and the control input end of the first power amplifier is connected with the relay control equipment.
3. The system according to claim 1, wherein: the second relay equipment comprises a second filter, a second relay switch and a second power amplifier, the input end of the second filter is connected with the first coupler, the output end of the second filter is connected with the second coupler through the second relay switch and the second power amplifier in sequence, and the control input end of the second relay switch is connected with the relay control equipment;
the second power amplifier is a variable gain power amplifier, and the control input end of the second power amplifier is connected with the relay control equipment.
4. The system according to claim 1, wherein: the relay control module includes:
the transmitting module is used for generating an L value when receiving relay requests from the machine back communication equipment and the machine belly communication equipment, and sending a communication satellite, a wave beam, a channel parameter, the relay requests and the corresponding L value as relay information;
the L value is determined as follows:
setting the number of airplanes capable of providing relays as n, and if the number of airplanes capable of providing relays n is less than or equal to K, L =1; when the number of airplanes capable of providing relays n > K, L = n/K;
where K represents the desired number of trunking channels, estimated by the aircraft's communication link conditions, e.g., current rate is mbps, if the desired rate is D × m bps, then K ≈ D;
a receiving module: monitoring relay information of other airplanes, and analyzing a relay request and a corresponding L value;
a random number generation module: outputting a random number through a random number generating program according to the L value analyzed by the receiving module, and judging whether to output a command for continuing relaying or not according to the random number;
the receiving processing module is used for receiving the relay requests of other airplanes after the random number generating module outputs the command of continuing the relay, then decoding the communication satellites, the wave beams and the channel parameters of the relay requests of other airplanes, if the communication satellites, the wave beams and the channel parameters of the other airplanes do not conflict with the communication wave beams and the channel parameters of the airplane, turning on the first relay switch or the second relay switch for relay, and setting the gain to be in an automatic gain mode by the gain control module;
the transmitting module is also used for sending a relay setting success command to the airplane sending the relay request after the relay is opened;
and the gain control module is used for carrying out communication test with the airplane sending the relay request, if the communication cannot be carried out normally, a gain increase control request command is sent, the gain control module reads the power value of the current automatic gain control, and the relay amplification factor is increased to the maximum by controlling the first power amplifier or the second power amplifier.
5. The system according to claim 4, wherein: the random number generation module outputs the command whether to relay through the random number generation program in the following way:
an integer in the interval [1, L ] is randomly generated by a random number generation program, if the generated integer is 1, a command to continue relaying is output, and if the generated integer is not 1, the command to continue relaying is not output.
6. An airborne communication method with a relay function, using the system of any one of claims 1 to 5, characterized in that: the method comprises a normal communication step S1, an uplink relay communication step S2 and a downlink relay communication step S3:
the normal communication step S1 includes:
the airplane back communication equipment of each airplane is communicated with the airplane back satellite through the first coupler and the airplane back antenna; the ventral communication device of each aircraft communicates with the ground communication station through a coupler and a ventral antenna;
the uplink relay communication step S2 includes:
s201, when the machine back communication equipment of any airplane A in the system finds that the uplink communication quality is poor, a relay request is sent to relay control equipment of the airplane A;
s202, when a relay control device in the airplane A receives a relay request from a machine back communication device, generating an L value, and sending a communication satellite, a wave beam, a channel parameter, the relay request and the corresponding L value of the machine back communication device as relay information through an airborne transceiver device;
s203, after relay control equipment in any airplane B above the airplane A in the system receives relay information of the airplane A through airborne transceiver equipment, decoding a communication satellite, a wave beam, a channel parameter, a relay request and a corresponding L value of airplane back communication equipment of the airplane A;
s204, the relay control equipment in the airplane B judges whether to output a command of continuing relay according to the L value:
if yes, go to step S205;
if not, the relay is stopped;
s205, the relay control device in the airplane B judges whether the decoded information meets the following conditions: the decoded information is the same as the communication satellite and the wave beam of the airplane back communication equipment of the airplane B, and the channel does not conflict with the airplane B;
if yes, the relay control device of the aircraft B turns on a first relay switch of the aircraft B, and the step S206 is carried out;
if not, keeping the relay switch of the airplane B in a closed state;
s206, receiving satellite signals from the aircraft A by the aircraft B from the aircraft belly antenna, coupling the satellite signals through the second coupler, connecting the satellite signals to a coupler connected with the aircraft back antenna through the first relay module, and sending the satellite signals to a communication satellite through the aircraft back antenna;
s207, the relay control device of the airplane B takes the communication satellite, the wave beam, the channel parameter and the relay success signal of the airplane back communication device of the airplane A as relay success feedback information and sends the relay success feedback information through the airborne transceiver device;
s208, after the relay control device in the airplane A receives relay success feedback information of the airplane B through the airborne transceiver device, counting the uplink communication quality found by the airplane back communication device of the airplane A within T time, if the uplink communication quality is good, not sending other information, if the uplink communication quality is not good, sending a relay unlocking requirement, and after the airplane B receives the relay unlocking requirement, disconnecting the relay module;
the downlink relay communication step S3 includes the following substeps:
s301, when finding that the uplink communication quality is poor, the belly communication equipment of any airplane A in the system sends a relay request to the relay control equipment of the airplane A;
s302, when a relay control device in the airplane A receives a relay request from an abdomen communication device, generating an L value, and sending a communication ground station, a wave beam, a channel parameter, the relay request and the corresponding L value of the abdomen communication device as relay information through an airborne transceiver;
s303, after relay control equipment in any airplane C below the airplane A in the system receives relay information of the airplane A through airborne transceiver equipment, decoding a communication ground station, a wave beam, a channel parameter, a relay request and a corresponding L value of belly communication equipment of the airplane A;
s304, the relay control device of the airplane C judges whether to output a command of continuing relay according to the L value:
if yes, go to step S305;
if not, the relay is stopped;
s305, the relay control equipment in the airplane C judges whether the decoded information meets the following conditions: the decoded information is the same as the communication ground station and the wave beam of the belly communication equipment of the airplane C, and the channel does not conflict with the airplane C;
if yes, the relay control device of the airplane C turns on a second relay switch of the airplane C, and the step S306 is carried out;
if not, keeping the relay switch of the airplane C in a closed state;
s306, the aircraft C receives a ground station communication signal from the aircraft A from the aircraft back antenna, is coupled through the first coupler, is connected to the second coupler connected with the belly antenna through the second relay module, and is sent to the ground communication station through the belly antenna;
s307, the relay control device of the airplane C takes the communication ground station, the wave beam, the channel parameter and the relay success signal of the belly communication device of the airplane A as relay success feedback information and sends the relay success feedback information through the airborne transceiver device;
s308, after the relay control device in the airplane A receives the relay success feedback information of the airplane C through the airborne transceiver device, counting the belly communication device of the airplane A within T time to find the uplink communication quality, if the uplink communication quality is good, not sending other information, if the uplink communication quality is not good, sending a relay unlocking request, and after the airplane C receives the relay unlocking request, disconnecting the relay module.
7. The method according to claim 6, wherein the relay function is selected from the group consisting of: the deterioration of the communication quality of the uplink and the downlink refers to the condition that the error rate does not reach the standard or the modulation order does not reach the standard, and the improvement of the communication quality of the uplink and the downlink refers to the condition that the error rate and the modulation order do not reach the standard any more.
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| US9221553B1 (en) * | 2013-06-26 | 2015-12-29 | Rockwell Collins, Inc. | Peer-to-peer mobile satcom |
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| JP6854457B2 (en) * | 2017-03-28 | 2021-04-07 | パナソニックＩｐマネジメント株式会社 | Wireless communication system, control device, relay device and wireless communication control method |
| CN107786258B (en) * | 2017-10-27 | 2020-06-05 | 北京空间技术研制试验中心 | Space-based measurement and control communication system of manned spacecraft |
| US10574339B2 (en) * | 2018-02-27 | 2020-02-25 | Microsoft Technology Licensing, Llc | Network access from airborne vehicle |
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