CN112436881B - Full-duplex half-duplex seamless self-adaptive switching system based on CCSDS (consultative system for data storage system) proxy-1 protocol - Google Patents

Full-duplex half-duplex seamless self-adaptive switching system based on CCSDS (consultative system for data storage system) proxy-1 protocol Download PDF

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CN112436881B
CN112436881B CN202011120783.9A CN202011120783A CN112436881B CN 112436881 B CN112436881 B CN 112436881B CN 202011120783 A CN202011120783 A CN 202011120783A CN 112436881 B CN112436881 B CN 112436881B
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transceiver
duplex
module
response module
solid
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CN112436881A (en
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田嘉
王伟
董超
惠腾飞
李雄飞
王大庆
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Xian Institute of Space Radio Technology
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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
    • H04B7/1851—Systems using a satellite or space-based relay
    • 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
    • H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
    • H04B7/18539—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection
    • 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
    • H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
    • H04B7/1858—Arrangements for data transmission on the physical system, i.e. for data bit transmission between network components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/16—Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
    • 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 relates to a full-duplex half-duplex seamless self-adaptive switching system based on a CCSDS (consultative Commity-1) protocol, belonging to the field of deep space exploration relay communication; the system comprises an integrated electronic unit, a waiting response module, a calling stage seamless switching module, a service stage communication module, a service stage seamless switching module, a half-duplex parameter self-adaptive adjusting module and a full-duplex parameter self-adaptive adjusting module. The invention realizes the seamless switching between the full-duplex mode and the half-duplex mode no matter the current state is under any branch of the protocol in the deep space detector power resource scheduling time, and adaptively adjusts the communication parameters according to the current scene, thereby solving the problems of frame loss and reduced communication throughput caused by communication interruption, reconnection and communication parameter mismatching when the full-duplex/half-duplex mode is switched in the CCSDS Proximaty-1 protocol, and ensuring that the maximum communication throughput is reached while the forward return is transmitted without errors in the detector power scheduling time.

Description

Full-duplex half-duplex seamless self-adaptive switching system based on CCSDS (consultative system for data storage system) proxy-1 protocol
Technical Field
The invention belongs to the field of deep space exploration relay communication, and relates to a full-duplex half-duplex seamless self-adaptive switching system based on a CCSDS proxy-1 protocol.
Background
In a deep space detection task such as a mars, because the communication distance is long, the remote control instruction on the ground has a longer time delay, and because the time of a visible arc section with the earth is limited, the remote control instruction cannot be controlled in real time, the forward link mainly depends on the autonomous communication between the surround device and the landing patrol device, the forward link generally transmits the remote control instruction which is transmitted to the landing patrol device from the ground through the surround device, and the return link generally transmits key telemetering information of the landing patrol device and other information such as an image acquired by the key telemetering information. The information transmitted in both the forward and return links is very important and no frame loss is allowed. Due to the shortage of the Mars vehicle resources, the situation of dynamic allocation of the whole device resources usually exists in the visible arc section, so that the power provided for each subsystem can be dynamically changed. The high-power solid-state amplifier is arranged on the transceiver of the UHF frequency band of the mars, the power consumption of the whole transceiver is high, forward and backward communication interruption is caused by the fact that a full duplex/half duplex communication mode is switched by subsystem resource allocation in a communication arc segment, after the communication interruption, the connection between the surround and the mars can be reestablished according to the requirement of a Proximaty-1 protocol, the time is long, and the communication throughput is reduced. In addition, full duplex and half duplex have different application scenarios, which may cause mismatching of communication parameters, resulting in further reduction of communication throughput.
Disclosure of Invention
The invention solves the technical problems that: the system overcomes the defects of the prior art, provides a full-duplex half-duplex seamless self-adaptive switching system based on a CCSDS Proximaty-1 protocol, realizes the seamless switching between a full-duplex mode and a half-duplex mode in the resource scheduling time of a regulator no matter the current state is under any branch of the protocol, adaptively adjusts communication parameters according to the current scene, and improves the throughput of the system to the maximum extent.
The technical scheme of the invention is as follows:
a full-duplex half-duplex seamless self-adaptive switching system based on a CCSDS proxy-1 protocol comprises a first transceiver and a second transceiver; each transceiver comprises a waiting response module, a calling stage seamless switching module, a service stage communication module, a service stage seamless switching module, a half-duplex parameter self-adaptive adjusting module, a full-duplex parameter self-adaptive adjusting module and a comprehensive electronic unit;
after the first transceiver is started, the stage seamless switching module of the first transceiver judges whether a duplex state switching instruction is received from the integrated electronic unit of the first transceiver, if the duplex state switching instruction is received, the solid-state amplifier is started, the mode switching SPDU instruction is sent to the waiting response module of the second transceiver, and then the solid-state amplifier is closed; if the instruction is not received, continuing waiting;
The wait for response module of the second transceiver: after receiving the mode switching SPDU command, the call-stage seamless switching module of the second transceiver starts the solid-state amplifier, sends the mode switching SPDU response reply to the waiting response module of the first transceiver, and then closes the solid-state amplifier;
after the waiting response module of the first transceiver receives the mode switching SPDU response reply, the calling phase seamless switching module of the first transceiver starts the solid-state amplifier, sends an HAIL command and an HAIL tail sequence to the waiting response module of the second transceiver and closes the solid-state amplifier;
after the waiting response module of the second transceiver receives the HAIL instruction, the call-stage seamless switching module of the second transceiver starts the solid-state amplifier, sends an HAIL response reply to the waiting response module of the first transceiver and closes the solid-state amplifier;
after the waiting response module of the first transceiver receives the HAIL response reply, the service phase communication module of the first transceiver starts to work;
if the current state is the full duplex mode, the service phase communication module of the first transceiver starts the solid-state amplifier, transmits a data service frame received from the integrated electronic unit of the first transceiver to the waiting response module of the second transceiver, and then keeps the current state to continuously transmit data; the waiting response module of the second transceiver transmits the data service frame to the integrated electronic unit of the second transceiver after receiving the data service frame; meanwhile, the service phase communication module of the second transceiver starts the solid-state amplifier, sends the data service frame received from the integrated electronic unit to the waiting response module of the first transceiver, then keeps in the current state, and continuously transmits data; after receiving the data service frame, the waiting response module of the first transceiver transmits the data service frame to the integrated electronic unit of the first transceiver;
If the current state is in a half-duplex mode, a service phase communication module of the first transceiver starts a solid-state amplifier, sends a data service frame received from a comprehensive electronic unit of the first transceiver to a waiting response module of the second transceiver, sends a TOKEN sequence to the waiting response module of the second transceiver after a timer is overtime, and then closes the solid-state amplifier; after receiving the TOKEN sequence, the service phase communication module of the second transceiver starts the solid-state amplifier, sends the data service frame received by the second transceiver from the integrated electronic unit to the waiting response module of the first transceiver, sends the TOKEN sequence to the waiting response module of the first transceiver after the timer is overtime, and then closes the solid-state amplifier; after receiving the TOKEN sequence, the waiting response module of the first transceiver starts a solid-state amplifier, repeats the actions and the like;
if a duplex state switching instruction is received from the integrated electronic unit of the first transceiver in the operation process of the service phase communication module of the first transceiver, the service phase seamless switching module of the first transceiver starts the solid-state amplifier and sends a mode switching SPDU instruction to a waiting response module of the second transceiver;
After a waiting response module of the second transceiver receives the mode switching SPDU command, a service phase seamless switching module of the second transceiver starts a solid-state amplifier and sends a mode switching SPDU response reply to a waiting response module of the first transceiver;
after a waiting response module of the first transceiver receives a mode switching SPDU response reply, judging the current duplex state, if the current state is a half-duplex mode, starting the half-duplex parameter self-adaptive adjustment module of the first transceiver to work, otherwise, starting the full-duplex parameter self-adaptive adjustment module of the first transceiver to work;
when the half-duplex parameter adaptive adjusting module of the first transceiver starts to work, the solid-state amplifier is started, the evaluation of the transmission efficiency is started, namely, the optimal transmission window is calculated according to the current transmission rate and is recorded as NT＝RT*TT/FL wherein RTAs a transmission rate, TTTransmitting starting time in half duplex, and FL is data frame length; if N is presentTIf the number of the frame is larger than the maximum frame number provided by the built-in RAM of the FPGA, the emission window is adjusted to the maximum value, otherwise, the emission window is adjusted to NT(ii) a After the transmission window is adjusted, the TOKEN sequence is sent to a waiting response module of the second transceiver, and the solid-state amplifier is closed;
After the waiting response module of the second transceiver receives the TOKEN sequence, the half-duplex parameter self-adaptive adjustment module of the second transceiver starts a solid-state amplifier, sends an idle sequence to the waiting response module of the first transceiver, sends the TOKEN sequence to the waiting response module of the first transceiver after the timer is overtime, and closes the solid-state amplifier;
a waiting response module of a first transceiver receives the idle sequence and carries out signal-to-noise ratio estimation, a half-duplex parameter self-adaptive adjustment module of the first transceiver estimates the link margin according to the current signal-to-noise ratio estimation condition, if the current channel margin is less than 3dB, a rate switching SPDU command is generated, and if not, the current rate is maintained unchanged;
after a waiting response module of a first transceiver receives the TOKEN sequence, a half-duplex parameter self-adaptive adjusting module of the first transceiver starts a solid-state amplifier and sends a rate switching SPDU command and a data service frame received from a comprehensive electronic unit of the first transceiver to a waiting response module of a second transceiver; after the timer is overtime, a TOKEN sequence is sent to a waiting response module of the second transceiver, and then the solid-state amplifier is closed;
After receiving the TOKEN sequence, the half-duplex parameter adaptive adjustment module of the second transceiver starts a solid-state amplifier, adjusts the transmission rate according to the requirement of the rate switching SPDU instruction, sends the data service frame received from the integrated electronic unit of the second transceiver to the waiting response module of the first transceiver, sends the TOKEN sequence to the waiting response module of the first transceiver after the timer is overtime, and then closes the solid-state amplifier;
after receiving the data service frame, the waiting response module of the first transceiver transmits the data service frame to the integrated electronic unit of the first transceiver, and when the TOKEN sequence is received, the solid-state amplifier is started, the data service frame is continuously transmitted, and so on;
when the full-duplex parameter adaptive adjustment module of the first transceiver starts to work, starting a solid-state amplifier, firstly sending a frame number confirmation SPDU to a waiting response module of the second transceiver, then timing and counting the data service frame received by the waiting response module by the full-duplex parameter adaptive adjustment module of the first transceiver, stopping timing and counting after sending the next frame number confirmation SPDU to the waiting response module of the second transceiver, and then starting to count the received effective frame and retransmission times to obtain a weighted average value A; if A is equal to 1, the data throughput is the best, and the parameter adjustment is finished; if A is not equal to 1, the full-duplex parameter self-adaptive adjustment module of the first transceiver sends a window lifting SPDU command to a waiting response module of the second transceiver;
After a waiting response module of the second transceiver receives a window lifting SPDU command, a full-duplex parameter self-adaptive adjusting module of the second transceiver judges whether the current transmission window is the maximum value, if the current transmission window is the maximum value, adjustment is not carried out, if the current transmission window is not the maximum value, the transmission window is lifted by a gear, a solid-state amplifier is started, and a transmission window lifting SPDU response is returned to a waiting response module of the first transceiver;
after a waiting response module of the first transceiver receives a window lifting SPDU response reply, a full-duplex parameter self-adaptive adjustment module of the first transceiver analyzes the window lifting SPDU response reply, if a feedback transmission window of the second transceiver is lifted by one gear, the full-duplex parameter self-adaptive adjustment module of the first transceiver enters an adjustment time timing mode, the communication throughput condition is continuously evaluated after waiting for a period of time, and if the feedback transmission window of the second transceiver is the maximum value, the full-duplex parameter self-adaptive adjustment module of the first transceiver finishes a parameter adjustment process;
the full-duplex parameter self-adaptive adjusting module of the first transceiver sends a data service frame received from the integrated electronic unit of the first transceiver to a waiting response module of the second transceiver, keeps the current state and continuously transmits data;
The waiting response module of the second transceiver transmits the data service frame to the integrated electronic unit of the second transceiver after receiving the data service frame; meanwhile, the full-duplex parameter adaptive adjustment module of the second transceiver sends the data service frame received from the integrated electronic unit of the second transceiver to the waiting response module of the first transceiver, and then the data service frame is kept in the current state and continuously transmits data;
the wait response module of the first transceiver receives the data service frame and transmits it to the integrated electronics unit of the first transceiver.
In the full-duplex half-duplex seamless self-adaptive switching system based on the CCSDS Proximaty-1 protocol, the mode switching SPDU command is used for a communication party to inform the communication party of a duplex mode after switching in a frame mode.
In the full-duplex half-duplex seamless self-adaptive switching system based on the CCSDS maximum-1 protocol, the Token sequence is used for informing, in the form of a frame, a communication party that the other communication party is switched from a transmitting state to a receiving state or from the receiving state to the transmitting state.
In the full-duplex half-duplex seamless adaptive switching system based on the CCSDS maximum-1 protocol, the rate switching SPDU is a gear to which a communication party informs the other communication party of a transmission rate to be switched in a frame form.
In the full-duplex half-duplex seamless adaptive switching system based on the CCSDS proxy-1 protocol, the frame number confirms that the SPDU records the frame number of the locally received effective frame in the form of a frame.
In the full-duplex half-duplex seamless self-adaptive switching system based on the CCSDS prompt-1 protocol, the window-up SPDU is a frame format in which one communication party informs the other communication party of raising the current Go-Back-N transmission window by one gear, wherein one gear represents the number of valid frames in the transmission window, and the higher the gear is, the more the number of valid frames contained in the window is.
In the full-duplex half-duplex seamless self-adaptive switching system based on the CCSDS maximum-1 protocol, the number of valid frames and retransmission times received by the first transceiver are counted to obtain a weighted average of the number of valid frame transmission times, which is specifically as follows:
the first transceiver receives the valid frame Num _1 times with the frame number FN _1, receives the valid frame Num _2 times with the frame number FN _2, … …, receives the valid frame Num _ M times with the frame number FN _ M, weights and averages the above data, and takes the whole upward, which is marked as a,
Figure BDA0002731958900000061
in the full-duplex half-duplex seamless adaptive switching system based on the CCSDS maximum-1 protocol, the HAIL command is a frame that a communication party informs a communication party of a frequency, a transmission rate level, a reception rate level, a transmission coding mode, and a reception coding mode of a traffic channel of the other communication party.
In the full-duplex half-duplex seamless self-adaptive switching system based on the CCSDS promimity-1 protocol, the Hail tail sequence is an idle sequence lasting for a period of time and is used for ensuring that a receiving end of the other communication party can accurately decode the Hail instruction.
In the full-duplex half-duplex seamless self-adaptive switching system based on the CCSDS promimity-1 protocol, a data service frame is sent, the length of a data field of the data service frame is 1-2048 bytes, and the frame format is consistent with the frame format specified in the CCSDS protocol.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention is compatible with the CCSDS protocol, realizes the seamless switching of full duplex and half duplex modes in the process of allocating power resources, and avoids the risks of system communication interruption and frame loss of forward/return links;
(2) in the half-duplex mode, the reliability of the communication link is improved through link margin evaluation and rate switching, and the risk that the retransmission time is greatly increased due to poor link quality of a system in the half-duplex mode is avoided;
(3) in the half-duplex mode, the throughput of communication is improved by evaluating the transmission efficiency and adjusting the Go-Back-N transmission window, and the risk that the retransmission time is greatly increased due to the fact that the transmission window is too small in the half-duplex mode is avoided;
(4) According to the invention, the state of channel throughput is accurately evaluated through timing counting and effective frame weighted averaging, and on the basis, the SPDU control instruction is promoted through the window, and the communication parameters are adaptively adjusted, so that the forward return link achieves the maximum communication throughput while ensuring error-free transmission, and the communication efficiency is improved;
(5) the method can be applied to deep space exploration represented by moon and mars, and embodies the design concept of optimal system and optimal resources in a deep space exploration task.
Drawings
FIG. 1 is a flow chart of attitude coupling control according to the present invention.
Detailed Description
The invention is further illustrated by the following examples.
The invention provides a full-duplex half-duplex seamless self-adaptive switching system based on a CCSDS Proximaty-1 protocol, which can realize seamless switching between a full-duplex state and a half-duplex state under a system with limited power, adaptively adjust parameters such as a communication rate, a Go-Back-N depth and the like, improve the communication throughput of the system to the maximum extent on the premise of not losing frames on the basis of being compatible with the Proximaty-1 protocol in the current deep space exploration task, and embody the design concept of optimal system and optimal power resources in the deep space exploration task.
A full-duplex, half-duplex seamless adaptive switching system, as shown in fig. 1, specifically includes a first transceiver and a second transceiver; each transceiver comprises a waiting response module, a calling stage seamless switching module, a service stage communication module, a service stage seamless switching module, a half-duplex parameter self-adaptive adjusting module, a full-duplex parameter self-adaptive adjusting module and a comprehensive electronic unit;
after the first transceiver is started, the stage seamless switching module of the first transceiver judges whether a duplex state switching instruction is received from the integrated electronic unit of the first transceiver, if the duplex state switching instruction is received, the solid-state amplifier is started, the mode switching SPDU instruction is sent to the waiting response module of the second transceiver, and then the solid-state amplifier is closed; if the instruction is not received, continuing waiting;
the wait for response module of the second transceiver: after receiving the mode switching SPDU command, the call-phase seamless switching module of the second transceiver starts the solid-state amplifier, sends the mode switching SPDU response reply to the waiting response module of the first transceiver, and then closes the solid-state amplifier;
after the waiting response module of the first transceiver receives the mode switching SPDU response reply, the calling phase seamless switching module of the first transceiver starts the solid-state amplifier, sends an HAIL command and an HAIL tail sequence to the waiting response module of the second transceiver and closes the solid-state amplifier;
After the waiting response module of the second transceiver receives the HAIL instruction, the call-stage seamless switching module of the second transceiver starts the solid-state amplifier, sends an HAIL response reply to the waiting response module of the first transceiver, and closes the solid-state amplifier;
after the waiting response module of the first transceiver receives the HAIL response reply, the service phase communication module of the first transceiver starts to work;
if the current state is the full duplex mode, the service phase communication module of the first transceiver starts the solid-state amplifier, transmits a data service frame received from the integrated electronic unit of the first transceiver to the waiting response module of the second transceiver, and then keeps the current state to continuously transmit data; the waiting response module of the second transceiver transmits the data service frame to the integrated electronic unit of the second transceiver after receiving the data service frame; meanwhile, the service phase communication module of the second transceiver starts the solid-state amplifier, sends the data service frame received from the integrated electronic unit to the waiting response module of the first transceiver, then keeps in the current state, and continuously transmits data; after receiving the data service frame, the waiting response module of the first transceiver transmits the data service frame to the integrated electronic unit of the first transceiver;
If the current state is in a half-duplex mode, a service phase communication module of the first transceiver starts a solid-state amplifier, sends a data service frame received from a comprehensive electronic unit of the first transceiver to a waiting response module of the second transceiver, sends a TOKEN sequence to the waiting response module of the second transceiver after a timer is overtime, and then closes the solid-state amplifier; after receiving the TOKEN sequence, the service phase communication module of the second transceiver starts a solid-state amplifier, transmits the data service frame received by the integrated electronic unit of the second transceiver to the waiting response module of the first transceiver, transmits the TOKEN sequence to the waiting response module of the first transceiver after the timer is overtime, and then closes the solid-state amplifier; after receiving the TOKEN sequence, the waiting response module of the first transceiver starts a solid-state amplifier, repeats the actions and the like;
if a duplex state switching instruction is received from the integrated electronic unit of the first transceiver in the operation process of the service phase communication module of the first transceiver, the service phase seamless switching module of the first transceiver starts a solid-state amplifier and sends a mode switching SPDU instruction to a waiting response module of the second transceiver;
After a waiting response module of the second transceiver receives the mode switching SPDU command, a service phase seamless switching module of the second transceiver starts a solid-state amplifier and sends a mode switching SPDU response reply to a waiting response module of the first transceiver;
after a waiting response module of the first transceiver receives a mode switching SPDU response reply, judging the current duplex state, if the current state is a half-duplex mode, starting the half-duplex parameter self-adaptive adjustment module of the first transceiver to work, otherwise, starting the full-duplex parameter self-adaptive adjustment module of the first transceiver to work;
when the half-duplex parameter adaptive adjusting module of the first transceiver starts to work, the solid-state amplifier is started, the evaluation of the transmission efficiency is started, namely, the optimal transmission window is calculated according to the current transmission rate and is recorded as NT＝RT*TT/FL wherein RTAs a transmission rate, TTTransmitting starting time in half duplex, and FL is data frame length; if N is presentTIf the number of the frame is larger than the maximum frame number provided by the built-in RAM of the FPGA, the emission window is adjusted to the maximum value, otherwise, the emission window is adjusted to NT(ii) a After the transmission window is adjusted, the TOKEN sequence is sent to a waiting response module of the second transceiver, and the solid-state amplifier is closed;
After the waiting response module of the second transceiver receives the TOKEN sequence, the half-duplex parameter adaptive adjustment module of the second transceiver starts a solid-state amplifier, sends an idle sequence to the waiting response module of the first transceiver, sends the TOKEN sequence to the waiting response module of the first transceiver after the timer is overtime, and closes the solid-state amplifier;
a waiting response module of the first transceiver receives the idle sequence and carries out signal-to-noise ratio estimation, a half-duplex parameter self-adaptive adjustment module of the first transceiver evaluates link margin according to the current signal-to-noise ratio estimation condition, if the current channel margin is less than 3dB, a rate switching SPDU command is generated, otherwise, the current rate is maintained unchanged;
after the waiting response module of the first transceiver receives the TOKEN sequence, the half-duplex parameter adaptive adjustment module of the first transceiver starts a solid-state amplifier and sends a rate switching SPDU command and a data service frame received from the integrated electronic unit of the first transceiver to the waiting response module of the second transceiver; after the timer is overtime, a TOKEN sequence is sent to a waiting response module of the second transceiver, and then the solid-state amplifier is closed;
After receiving the TOKEN sequence, the half-duplex parameter adaptive adjustment module of the second transceiver starts a solid-state amplifier, adjusts the transmission rate according to the requirement of the rate switching SPDU instruction, sends the data service frame received from the integrated electronic unit of the second transceiver to the waiting response module of the first transceiver, sends the TOKEN sequence to the waiting response module of the first transceiver after the timer is overtime, and then closes the solid-state amplifier;
after receiving the data service frame, the waiting response module of the first transceiver transmits the data service frame to the integrated electronic unit of the first transceiver, and when the TOKEN sequence is received, the solid-state amplifier is started, the data service frame is continuously transmitted, and the like;
when the full-duplex parameter adaptive adjustment module of the first transceiver starts to work, starting a solid-state amplifier, firstly sending a frame number confirmation SPDU to a waiting response module of the second transceiver, then timing and counting the data service frame received by the waiting response module by the full-duplex parameter adaptive adjustment module of the first transceiver, stopping timing and counting after sending the next frame number confirmation SPDU to the waiting response module of the second transceiver, and then starting to count the received effective frame and retransmission times to obtain a weighted average value A; if A is 1, the data throughput is the best, and the parameter adjustment is finished; if A is not equal to 1, the full-duplex parameter adaptive adjustment module of the first transceiver sends a window lifting SPDU instruction to a waiting response module of the second transceiver;
After a waiting response module of the second transceiver receives a window lifting SPDU command, a full-duplex parameter self-adaptive adjusting module of the second transceiver judges whether the current transmission window is the maximum value, if the current transmission window is the maximum value, adjustment is not carried out, if the current transmission window is not the maximum value, the transmission window is lifted by one gear, a solid-state amplifier is started, and a transmission window lifting SPDU response is replied to the waiting response module of the first transceiver;
after a waiting response module of the first transceiver receives a window lifting SPDU response reply, a full-duplex parameter self-adaptive adjustment module of the first transceiver analyzes the window lifting SPDU response reply, if a feedback transmission window of the second transceiver is lifted by one gear, the full-duplex parameter self-adaptive adjustment module of the first transceiver enters an adjustment time timing mode, the communication throughput condition is continuously evaluated after waiting for a period of time, and if the feedback transmission window of the second transceiver is the maximum value, the full-duplex parameter self-adaptive adjustment module of the first transceiver finishes a parameter adjustment process;
the full-duplex parameter self-adaptive adjusting module of the first transceiver sends a data service frame received from the integrated electronic unit of the first transceiver to a waiting response module of the second transceiver, keeps in a current state and continuously transmits data;
The waiting response module of the second transceiver transmits the data service frame to the integrated electronic unit of the second transceiver after receiving the data service frame; meanwhile, the full-duplex parameter adaptive adjustment module of the second transceiver sends the data service frame received from the integrated electronic unit of the second transceiver to the waiting response module of the first transceiver, and then the data service frame is kept in the current state and continuously transmits data;
the wait response module of the first transceiver receives the data service frame and transmits it to the integrated electronics unit of the first transceiver.
The mode switching SPDU is used for informing a communication party of a duplex mode after the switching of the communication party by the communication party in a frame mode. And the Token sequence is used for informing the other communication party of switching from the transmitting state to the receiving state or switching from the receiving state to the transmitting state in the form of frames. The rate switching SPDU is used for informing the communication party of the gear to which the transmission rate needs to be switched to the other communication party in the form of frames. The frame number acknowledgement SPDU records the frame number of the locally received valid frame in the form of a frame. The window lifting SPDU is a frame form which is informed by a communication party to the communication other party to lift a current Go-Back-N transmission window by one gear, wherein one gear represents the number of effective frames in the transmission window, and the higher the gear is, the more the number of effective frames contained in the window is.
Counting the number of effective frames and retransmission times received by the first transceiver to obtain a weighted average of the transmission times of the effective frames, which is specifically as follows:
the first transceiver receives the valid frame Num _1 with the frame number FN _1 times, receives the valid frame Num _2 with the frame number FN _2 times, … …, receives the valid frame Num _ M with the frame number FN _ M times, weights and averages the above data, and rounds up, denoted as a,
Figure BDA0002731958900000121
the HAIL command is a command that the communication party informs the other communication party of the frequency, the transmission rate level, the reception rate level, the transmission coding mode and the reception coding mode of the traffic channel in the form of frames. The Hail tail sequence is an idle sequence lasting for a period of time and is used for ensuring that a receiving end of the other communication party can accurately decode the Hail instruction. And sending a data service frame, wherein the length of a data field of the data service frame is 1-2048 bytes, and the frame format is consistent with the frame format specified in the CCSDS protocol.
The invention is realized and verified on a Mars landing inspection tour device measurement and control data transmission subsystem UHF frequency band transceiver and a Mars surround device UHF relay communicator (ground inspection simulation), in the process of allocating power resources, the traditional method causes communication interruption, generates forward and backward lost frames, reestablishes connection after 20s of communication interruption, and obviously reduces the system throughput due to unmatched communication parameters after establishment. By adopting the method, in the process of allocating power resources, seamless switching is realized in a full duplex/half duplex mode, communication parameters are adaptively adjusted according to the current scene, and the throughput of the system is improved to the maximum extent.
The method has low complexity and flexible realization, can be widely applied to deep space exploration represented by moon and mars, provides powerful technical support for the establishment of moon and mars communication under the condition of limited power resources in the future, and has good technical value and economic value.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.

Claims (10)

1. A full-duplex half-duplex seamless self-adaptive switching system based on a CCSDS proxy-1 protocol is characterized in that: comprises a first transceiver and a second transceiver; each transceiver comprises a waiting response module, a calling stage seamless switching module, a service stage communication module, a service stage seamless switching module, a half-duplex parameter self-adaptive adjusting module, a full-duplex parameter self-adaptive adjusting module and a comprehensive electronic unit;
After the first transceiver is started, the phase seamless switching module of the first transceiver judges whether a duplex state switching instruction is received from the integrated electronic unit of the first transceiver, if the duplex state switching instruction is received, the solid-state amplifier is started, the mode switching SPDU instruction is sent to the waiting response module of the second transceiver, and then the solid-state amplifier is closed; if the instruction is not received, continuing to wait;
the wait for response module of the second transceiver: after receiving the mode switching SPDU command, the call-stage seamless switching module of the second transceiver starts the solid-state amplifier, sends the mode switching SPDU response reply to the waiting response module of the first transceiver, and then closes the solid-state amplifier;
after the waiting response module of the first transceiver receives the mode switching SPDU response reply, the calling phase seamless switching module of the first transceiver starts the solid-state amplifier, sends an HAIL command and an HAIL tail sequence to the waiting response module of the second transceiver and closes the solid-state amplifier;
after the waiting response module of the second transceiver receives the HAIL instruction, the call-stage seamless switching module of the second transceiver starts the solid-state amplifier, sends an HAIL response reply to the waiting response module of the first transceiver, and closes the solid-state amplifier;
After the waiting response module of the first transceiver receives the HAIL response reply, the service phase communication module of the first transceiver starts to work;
if the current state is in a full duplex mode, a service phase communication module of the first transceiver starts a solid-state amplifier, sends a data service frame received from a comprehensive electronic unit of the first transceiver to a waiting response module of the second transceiver, and then keeps in the current state to continuously transmit data; the waiting response module of the second transceiver transmits the data service frame to the integrated electronic unit of the second transceiver after receiving the data service frame; meanwhile, the service phase communication module of the second transceiver starts the solid-state amplifier, sends the data service frame received from the integrated electronic unit to the waiting response module of the first transceiver, then keeps in the current state, and continuously transmits data; after receiving the data service frame, the waiting response module of the first transceiver transmits the data service frame to the integrated electronic unit of the first transceiver;
if the current state is in a half-duplex mode, the service phase communication module of the first transceiver starts a solid-state amplifier, sends a data service frame received from the integrated electronic unit of the first transceiver to a waiting response module of the second transceiver, sends a TOKEN sequence to the waiting response module of the second transceiver after the timer is overtime, and then closes the solid-state amplifier; after receiving the TOKEN sequence, the service phase communication module of the second transceiver starts a solid-state amplifier, transmits the data service frame received by the integrated electronic unit of the second transceiver to the waiting response module of the first transceiver, transmits the TOKEN sequence to the waiting response module of the first transceiver after the timer is overtime, and then closes the solid-state amplifier; after receiving the TOKEN sequence, starting a solid-state amplifier, repeating the actions and the like;
If a duplex state switching instruction is received from the integrated electronic unit of the first transceiver in the operation process of the service phase communication module of the first transceiver, the service phase seamless switching module of the first transceiver starts the solid-state amplifier and sends a mode switching SPDU instruction to a waiting response module of the second transceiver;
after a waiting response module of the second transceiver receives the mode switching SPDU command, a service phase seamless switching module of the second transceiver starts a solid-state amplifier and sends a mode switching SPDU response reply to a waiting response module of the first transceiver;
after a waiting response module of the first transceiver receives a mode switching SPDU response reply, judging the current duplex state, if the current state is a half-duplex mode, starting the half-duplex parameter self-adaptive adjustment module of the first transceiver to work, otherwise, starting the full-duplex parameter self-adaptive adjustment module of the first transceiver to work;
when the half-duplex parameter adaptive adjusting module of the first transceiver starts to work, the solid-state amplifier is started, the evaluation of the transmission efficiency is started, namely, the optimal transmission window is calculated according to the current transmission rate and is recorded as N T＝RT*TT/FL wherein RTAs a transmission rate, TTTransmitting starting time in half duplex, FL is data frame length; if N is presentTIf the number of the frame is larger than the maximum frame number provided by the built-in RAM of the FPGA, the emission window is adjusted to the maximum value, otherwise, the emission window is adjusted to NT(ii) a After the transmission window is adjusted, the TOKEN sequence is sent to a waiting response module of the second transceiver, and the solid-state amplifier is closed;
after the waiting response module of the second transceiver receives the TOKEN sequence, the half-duplex parameter adaptive adjustment module of the second transceiver starts a solid-state amplifier, sends an idle sequence to the waiting response module of the first transceiver, sends the TOKEN sequence to the waiting response module of the first transceiver after the timer is overtime, and closes the solid-state amplifier;
a waiting response module of the first transceiver receives the idle sequence and carries out signal-to-noise ratio estimation, a half-duplex parameter self-adaptive adjustment module of the first transceiver evaluates link margin according to the current signal-to-noise ratio estimation condition, if the current channel margin is less than 3dB, a rate switching SPDU command is generated, otherwise, the current rate is maintained unchanged;
after the waiting response module of the first transceiver receives the TOKEN sequence, the half-duplex parameter adaptive adjustment module of the first transceiver starts a solid-state amplifier and sends a rate switching SPDU command and a data service frame received from the integrated electronic unit of the first transceiver to the waiting response module of the second transceiver; after the timer is overtime, a TOKEN sequence is sent to a waiting response module of the second transceiver, and then the solid-state amplifier is closed;
After receiving the TOKEN sequence, the half-duplex parameter adaptive adjustment module of the second transceiver starts a solid-state amplifier, adjusts the transmission rate according to the requirement of a rate switching SPDU command, sends the data service frame received from the integrated electronic unit of the second transceiver to a waiting response module of the first transceiver, sends the TOKEN sequence to a waiting response module of the first transceiver after the timer is overtime, and then closes the solid-state amplifier;
after receiving the data service frame, the waiting response module of the first transceiver transmits the data service frame to the integrated electronic unit of the first transceiver, and when the TOKEN sequence is received, the solid-state amplifier is started, the data service frame is continuously transmitted, and so on;
when the full-duplex parameter adaptive adjustment module of the first transceiver starts to work, starting a solid-state amplifier, firstly sending a frame number confirmation SPDU to a waiting response module of the second transceiver, then timing and counting the data service frame received by the waiting response module by the full-duplex parameter adaptive adjustment module of the first transceiver, stopping timing and counting after sending the next frame number confirmation SPDU to the waiting response module of the second transceiver, and then starting to count the received effective frame and retransmission times to obtain a weighted average value A; if A is equal to 1, the data throughput is the best, and the parameter adjustment is finished; if A is not equal to 1, the full-duplex parameter self-adaptive adjustment module of the first transceiver sends a window lifting SPDU command to a waiting response module of the second transceiver;
After a waiting response module of the second transceiver receives a window lifting SPDU command, a full-duplex parameter self-adaptive adjusting module of the second transceiver judges whether the current transmission window is the maximum value, if the current transmission window is the maximum value, adjustment is not carried out, if the current transmission window is not the maximum value, the transmission window is lifted by a gear, a solid-state amplifier is started, and a transmission window lifting SPDU response is returned to a waiting response module of the first transceiver;
after a waiting response module of the first transceiver receives a window lifting SPDU response reply, a full-duplex parameter self-adaptive adjustment module of the first transceiver analyzes the window lifting SPDU response reply, if a feedback transmission window of the second transceiver is lifted by a gear, the full-duplex parameter self-adaptive adjustment module of the first transceiver enters a time regulation and timing mode, the communication throughput condition is continuously evaluated after waiting for a period of time, and if the feedback transmission window of the second transceiver is already the maximum value, the full-duplex parameter self-adaptive adjustment module of the first transceiver ends a parameter adjustment process;
the full-duplex parameter self-adaptive adjusting module of the first transceiver sends a data service frame received from the integrated electronic unit of the first transceiver to a waiting response module of the second transceiver, keeps the current state and continuously transmits data;
The waiting response module of the second transceiver transmits the data service frame to the integrated electronic unit of the second transceiver after receiving the data service frame; meanwhile, the full-duplex parameter adaptive adjustment module of the second transceiver sends the data service frame received from the integrated electronic unit of the second transceiver to the waiting response module of the first transceiver, and then the data service frame is kept in the current state and continuously transmits data;
the wait response module of the first transceiver receives the data service frame and transmits it to the integrated electronics unit of the first transceiver.
2. The full-duplex half-duplex seamless adaptive switching system based on the CCSDS proxy-1 protocol as claimed in claim 1, characterized in that: the mode switching SPDU command is used in the form of a frame for the communication party to notify the communication party of the duplex mode after switching.
3. The CCSDS prompt-1 protocol based full-duplex half-duplex seamless adaptive handover system according to claim 2, wherein: the Token sequence is used for informing a communication party of switching from a transmitting state to a receiving state or switching from the receiving state to the transmitting state by the communication party in the form of frames.
4. The CCSDS promimity-1 protocol-based full-duplex half-duplex seamless adaptive switching system according to claim 3, wherein: the rate switching SPDU is a gear to which a communication party informs another communication party of a transmission rate to be switched in a frame form.
5. The CCSDS Proximaty-1 protocol-based full-duplex half-duplex seamless adaptive switching system according to claim 4, wherein: the frame number confirms that the SPDU is the frame number of the effective frame which is locally received and recorded in the form of a frame.
6. The CCSDS Proximaty-1 protocol-based full-duplex half-duplex seamless adaptive switching system according to claim 5, wherein: the window lifting SPDU is a position which is informed by a communication party to the other communication party in a frame mode to lift the current Go-Back-N transmission window by one gear, wherein one gear represents the number of effective frames in the transmission window, and the higher the gear is, the more the number of effective frames contained in the window is.
7. The CCSDS promimity-1 protocol-based full-duplex half-duplex seamless adaptive switching system according to claim 6, wherein: counting the number of effective frames and retransmission times received by the first transceiver to obtain a weighted average of the transmission times of the effective frames, which is specifically as follows:
the first transceiver receives the valid frame Num _1 with the frame number FN _1 times, receives the valid frame Num _2 with the frame number FN _2 times, … …, receives the valid frame Num _ M with the frame number FN _ M times, weights and averages the above data, and rounds up, denoted as a,
Figure FDA0002731958890000051
8. The full-duplex half-duplex seamless adaptive switching system based on the CCSDS proxy-1 protocol as claimed in claim 7, wherein: the HAIL command is used for informing the communication party of the frequency, the transmission rate level, the reception rate level, the transmission coding mode and the reception coding mode of a traffic channel of the other communication party in the form of frames.
9. The full-duplex half-duplex seamless adaptive switching system based on the CCSDS proxy-1 protocol as claimed in claim 8, characterized in that: the Hail tail sequence is an idle sequence lasting for a period of time and is used for ensuring that a receiving end of the other communication party can accurately decode the Hail instruction.
10. The CCSDS prompt-1 protocol based full-duplex half-duplex seamless adaptive handover system according to claim 9, wherein: and sending a data service frame, wherein the length of a data field of the data service frame is 1-2048 bytes, and the frame format is consistent with the frame format specified in the CCSDS protocol.
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