CN117579135A - Retransmission threshold dynamic adjustment method and device in non-ground network transmission - Google Patents
Retransmission threshold dynamic adjustment method and device in non-ground network transmission Download PDFInfo
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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
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18586—Arrangements for data transporting, e.g. for an end to end data transport or check
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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
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18584—Arrangements for data networking, i.e. for data packet routing, for congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- 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
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Abstract
The embodiment of the invention discloses a method and a device for dynamically adjusting retransmission threshold in non-ground network transmission, wherein the method comprises the following steps: under the condition that the terminal equipment is detected to adopt a non-ground network to carry out data transmission, determining the track type of the currently connected satellite; determining a corresponding retransmission threshold interval according to the track type, wherein the retransmission threshold interval records a retransmission time threshold for comparison when the data packet is retransmitted; determining the current data packet congestion condition of the terminal equipment, and selecting a retransmission time threshold value in a retransmission threshold value interval according to the data packet congestion condition; and triggering retransmission of the data packet based on the retransmission time threshold and the transmission time of the data packet. The scheme solves the problems of fixed retransmission time threshold value, lack of a reasonable adjustment mechanism and low data transmission efficiency in most of the hybrid automatic retransmission request mechanisms in the prior art, can adaptively adjust the retransmission time threshold value according to the orbit type of the satellite, and optimizes a network communication mechanism.
Description
Technical Field
The embodiment of the application relates to the technical field of wireless networks, in particular to a retransmission threshold dynamic adjustment method and device in non-ground network transmission.
Background
The non-ground network is an important supplement to the ground cellular communication technology, can communicate without depending on ground infrastructure, can provide communication service for areas lacking infrastructure by utilizing satellite communication, and also supports mobile network operators to normally provide communication service under the condition of ground network interruption. The non-ground network can adopt a hybrid automatic retransmission technology in the data transmission process, and the error detection and correction of the data transmission are realized by adopting a mode of combining forward error correction coding with automatic retransmission request in the transmission process. The hybrid automatic repeat request technology can detect errors occurring in the data transmission process and retransmit the data when the errors occur so as to ensure the correct transmission of the data.
The distance between the ground station/user terminal and the satellite is far and the speed of light is limited, so that the radio wave needs to reach the user equipment for a long time, the delay is greatly dependent on the height of the satellite, and the transmission delays of satellites in different positions and orbits are different, but in the existing retransmission request technology, the retransmission time in most of the hybrid automatic retransmission request mechanisms is fixed, a reasonable adjustment mechanism is lacked, and the data transmission efficiency is low.
Disclosure of Invention
The embodiment of the invention provides a retransmission threshold dynamic adjustment method and a retransmission threshold dynamic adjustment device in non-ground network transmission, solves the problems of fixed retransmission time threshold, lack of a reasonable adjustment mechanism and low data transmission efficiency in most of hybrid automatic retransmission request mechanisms in the prior art, can adaptively adjust the retransmission time threshold according to the orbit type of a satellite, and optimizes a network communication mechanism.
In a first aspect, an embodiment of the present invention provides a method for dynamically adjusting a retransmission threshold in non-terrestrial network transmission, including:
under the condition that the terminal equipment is detected to adopt a non-ground network to carry out data transmission, determining the track type of the currently connected satellite;
determining a corresponding retransmission threshold interval according to the track type, wherein the retransmission threshold interval records a retransmission time threshold for comparison during data packet retransmission;
determining the current data packet congestion condition of the terminal equipment, and selecting a retransmission time threshold value in the retransmission threshold value interval according to the data packet congestion condition;
and triggering retransmission of the data packet based on the retransmission time threshold and the transmission time of the data packet.
Before the corresponding retransmission threshold interval is determined according to the track type, the method further comprises the following steps:
and determining and recording a corresponding retransmission threshold interval based on the transmission delay when the terminal equipment performs data transmission through satellites of different orbit types.
Optionally, the determining the current packet congestion condition of the terminal device includes:
acquiring the current retransmission process number of the terminal equipment and the data length of a retransmission queue;
and determining the current data packet congestion condition of the terminal equipment according to the retransmission process number and the data length of the retransmission queue.
Optionally, the determining, according to the number of retransmission processes and the data length of the retransmission queue, the current packet congestion condition of the terminal device includes:
determining that the current data packet congestion condition is congestion under the condition that the data length of the retransmission queue is larger than the preset length and the number of retransmission processes is smaller than the preset number;
determining that the current data packet congestion condition is normal under the condition that the data length of the retransmission queue is larger than the preset length and the number of retransmission processes is not smaller than the preset number;
determining that the current data packet congestion condition is not congestion under the condition that the data length of the retransmission queue is not greater than the preset length and the number of retransmission processes is not less than the preset number;
and under the condition that the data length of the retransmission queue is not greater than the preset length and the number of retransmission processes is smaller than the preset number, determining that the current data packet congestion condition is normal.
Optionally, the retransmission threshold interval includes a retransmission minimum threshold, a retransmission intermediate threshold, and a retransmission maximum threshold, and the selecting a retransmission time threshold in the retransmission threshold interval according to the packet congestion condition includes:
selecting the retransmission minimum threshold value and the retransmission time threshold value under the condition that the data packet is congested;
selecting the retransmission intermediate threshold value and the retransmission time threshold value under the condition that the data packet congestion condition is normal;
and selecting the retransmission maximum threshold value and the retransmission time threshold value under the condition that the data packet is not congested.
Optionally, the method further comprises:
and recovering the retransmission time threshold value to be a system default value under the condition that the terminal equipment is detected to adopt the ground network to carry out data transmission.
Optionally, before the determining the orbit type of the currently connected satellite, the method further includes:
and determining the connected satellite according to the current position of the terminal equipment and the historical signal-to-noise ratio in the recorded satellite list, and establishing network connection.
In a second aspect, an embodiment of the present invention further provides a retransmission threshold dynamic adjustment device in non-terrestrial network transmission, including:
the type determining module is configured to determine the track type of the currently connected satellite under the condition that the terminal equipment is detected to adopt a non-ground network for data transmission;
the threshold determining module is configured to determine a corresponding retransmission threshold interval according to the track type, wherein the retransmission threshold interval records retransmission time thresholds used for comparison during data packet retransmission, determines the current data packet congestion condition of the terminal equipment, and selects the retransmission time thresholds in the retransmission threshold interval according to the data packet congestion condition;
and the retransmission processing module is configured to trigger retransmission of the data packet based on the retransmission time threshold and the sending time of the data packet.
In a third aspect, an embodiment of the present invention further provides a retransmission threshold dynamic adjustment device in non-terrestrial network transmission, where the device includes:
one or more processors;
storage means for storing one or more programs,
and when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the method for dynamically adjusting retransmission threshold in non-terrestrial network transmission according to the embodiment of the present invention.
In a fourth aspect, embodiments of the present invention further provide a storage medium storing computer-executable instructions that, when executed by a computer processor, are configured to perform a method for dynamically adjusting a retransmission threshold in non-terrestrial network transmission according to embodiments of the present invention.
In the embodiment of the invention, under the condition that the terminal equipment is detected to adopt a non-ground network to carry out data transmission, determining the track type of the currently connected satellite; determining a corresponding retransmission threshold interval according to the track type, wherein the retransmission threshold interval records a retransmission time threshold for comparison during data packet retransmission; determining the current data packet congestion condition of the terminal equipment, and selecting a retransmission time threshold value in the retransmission threshold value interval according to the data packet congestion condition; and triggering retransmission of the data packet based on the retransmission time threshold and the transmission time of the data packet. The scheme solves the problems of fixed retransmission time threshold value, lack of a reasonable adjustment mechanism and low data transmission efficiency in most of the hybrid automatic retransmission request mechanisms in the prior art, can adaptively adjust the retransmission time threshold value according to the orbit type of the satellite, and optimizes a network communication mechanism.
Drawings
Fig. 1 is a flowchart of a method for dynamically adjusting retransmission threshold in non-terrestrial network transmission according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for determining a congestion condition of a data packet according to an embodiment of the present invention;
fig. 3 is a flowchart of another method for dynamically adjusting retransmission threshold in non-terrestrial network transmission according to an embodiment of the present invention;
fig. 4 is a flowchart of another method for dynamically adjusting retransmission threshold in non-terrestrial network transmission according to an embodiment of the present invention;
fig. 5 is a block diagram of a module structure of a retransmission threshold dynamic adjustment device in non-terrestrial network transmission according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a retransmission threshold dynamic adjustment device in non-terrestrial network transmission according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in further detail below with reference to the drawings and examples. It should be understood that the particular embodiments described herein are illustrative only and are not limiting of embodiments of the invention. It should be further noted that, for convenience of description, only some, but not all of the structures related to the embodiments of the present invention are shown in the drawings.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The retransmission threshold dynamic adjustment method in non-ground network transmission can be used for adjusting the retransmission time threshold used for determining whether to send a retransmission packet in HARQ under the condition that terminal equipment performs wireless network communication.
In the retransmission threshold dynamic adjustment method in non-terrestrial network transmission provided in the embodiment of the present application, the execution subject of each step may be a computer device, where the computer device refers to any electronic device having data computing, processing and storage capabilities, for example, a terminal device such as a mobile phone, a PC (Personal Computer, a personal computer), a tablet computer, or a device such as a server, which is not limited in this embodiment of the present application.
Fig. 1 is a flowchart of a method for dynamically adjusting a retransmission threshold in non-terrestrial network transmission according to an embodiment of the present invention, as shown in fig. 1, specifically including:
step S101, determining the orbit type of the currently connected satellite under the condition that the terminal equipment is detected to adopt a non-ground network for data transmission.
NTN (Non Terrestrial Network, non-terrestrial network) is a generic term for all networks involving flying objects, including satellite communication networks, high-altitude platform systems, and air-to-ground networks, among others. The satellite communication network relies on a satellite-borne platform, including low-orbit satellites, medium-orbit satellites and geosynchronous orbit satellites; the high-altitude platform system is borne on an airborne platform, comprises an airplane, a balloon and an airship, takes a high-altitude platform station as a mobile communication base station and provides mobile service by using the same frequency band of a ground mobile network. The NTN network may be deployed alone or in addition to the terrestrial network. The method can be widely applied to the fields of traffic, public safety, electronic health, agriculture, finance, automobiles and the like due to the wide service coverage capability, robustness and flexibility for coping with physical attacks or natural disasters.
In one embodiment, the orbit type of the currently connected satellite is determined in case it is detected that the terminal device uses a non-terrestrial network for data transmission. Optionally, the orbit type includes a low orbit satellite, a middle orbit satellite, a geosynchronous orbit satellite and the like, which represents the orbit of the connected satellite, and the communication delay condition of the terminal device and the satellite is indirectly represented due to different heights of different orbits from the earth surface. Optionally, the communication connection information may be obtained through a communication related interface of the terminal device, so as to obtain a current communication connection mode, and determine a currently connected satellite. Alternatively, the type of orbit of the currently connected satellite may be determined based on the identification of the connected satellite or a separately recorded ephemeris file.
Step S102, determining a corresponding retransmission threshold interval according to the track type, wherein the retransmission threshold interval records a retransmission time threshold for comparison during data packet retransmission.
In one embodiment, after determining the track type, a corresponding retransmission threshold interval is determined according to the track type. The retransmission threshold interval records a retransmission time threshold for comparison during data packet retransmission. Optionally, in the data retransmission processing mechanism, after the data transmitting end sends out the data packet, if the response of the opposite end is not received within a certain period of time, the opposite end is judged to not receive the data packet, and retransmission of the data packet is correspondingly performed, wherein the period of time for judging is recorded as a retransmission time threshold.
Alternatively, the retransmission time threshold recorded in the retransmission threshold interval may be a continuous value or a discrete value, which is exemplified by a discrete value, and may include three values, namely, a retransmission minimum threshold, a retransmission middle threshold and a retransmission maximum threshold.
In one embodiment, the corresponding retransmission threshold interval is determined and recorded in advance based on the transmission delay of the terminal device when transmitting data through satellites of different orbit types. That is, retransmission threshold sections are configured in advance for different satellite orbit types. When determining the retransmission threshold section, the retransmission threshold section can be determined according to the transmission delay of the satellite with the orbit type when transmitting data, for example, taking the transmission delay as the round trip transmission delay, and adding the round trip transmission delay and the two endpoints of the original retransmission threshold section to obtain the retransmission threshold section. Naturally, if the value is discrete, the original discrete value is added with the round trip transmission delay to obtain a retransmission threshold interval.
Step S103, determining the current data packet congestion condition of the terminal equipment, and selecting a retransmission time threshold value in the retransmission threshold value interval according to the data packet congestion condition.
In one embodiment, after determining the retransmission threshold interval, a retransmission time threshold is further determined based on the current packet congestion condition of the terminal device.
Optionally, fig. 2 is a flowchart of a method for determining congestion of a data packet according to an embodiment of the present invention, as shown in fig. 2, including:
step S1031, obtaining the current retransmission process number of the terminal device and the data length of the retransmission queue.
The retransmission process may be an HARQ process, and retransmission of the data packet may be performed independently by each individual retransmission process, where multiple retransmission processes implement parallel data retransmission. The retransmission queue may be an average value of data lengths of queues configured independently for each retransmission process, or may be a total data length of a queue.
Step S1032, determining the current data packet congestion condition of the terminal equipment according to the retransmission process number and the data length of the retransmission queue.
And when the congestion condition of the data packet is determined, determining the number of retransmission processes and the data length of a retransmission queue. Alternatively, one way of determining may be: determining that the current data packet congestion condition is congestion under the condition that the data length of the retransmission queue is larger than the preset length and the number of retransmission processes is smaller than the preset number; determining that the current data packet congestion condition is normal under the condition that the data length of the retransmission queue is larger than the preset length and the number of retransmission processes is not smaller than the preset number; determining that the current data packet congestion condition is not congestion under the condition that the data length of the retransmission queue is not greater than the preset length and the number of retransmission processes is not less than the preset number; and under the condition that the data length of the retransmission queue is not greater than the preset length and the number of retransmission processes is smaller than the preset number, determining that the current data packet congestion condition is normal. And determining whether the congestion condition of the data packet is normal, congestion or non-congestion according to the specific different retransmission process number and the data length of the retransmission queue. The preset length and the preset number can be preset or adaptively set according to actual transmission conditions.
In one embodiment, after determining a packet congestion condition, a retransmission time threshold is selected within the retransmission threshold interval based on the packet congestion condition. Optionally, taking an example that the retransmission threshold interval includes a retransmission minimum threshold, a retransmission middle threshold and a retransmission maximum threshold, the selection manner may be: selecting the retransmission minimum threshold value and the retransmission time threshold value under the condition that the data packet is congested; selecting the retransmission intermediate threshold value and the retransmission time threshold value under the condition that the data packet congestion condition is normal; and selecting the retransmission maximum threshold value and the retransmission time threshold value under the condition that the data packet is not congested.
Step S104, triggering retransmission of the data packet based on the retransmission time threshold and the transmission time of the data packet.
In one embodiment, after determining the retransmission time threshold, the retransmission time threshold is used as a time basis for judging whether to send the retransmission packet, and when the sending time of the data packet passes the time length corresponding to the retransmission time threshold and the response packet is not received yet, the retransmission of the data packet is triggered.
The method comprises the steps that under the condition that the fact that the terminal equipment adopts a non-ground network to conduct data transmission is detected, the track type of a currently connected satellite is determined; determining a corresponding retransmission threshold interval according to the track type, wherein the retransmission threshold interval records a retransmission time threshold for comparison during data packet retransmission; determining the current data packet congestion condition of the terminal equipment, and selecting a retransmission time threshold value in the retransmission threshold value interval according to the data packet congestion condition; and triggering retransmission of the data packet based on the retransmission time threshold and the transmission time of the data packet. The scheme solves the problems of fixed retransmission time threshold value, lack of a reasonable adjustment mechanism and low data transmission efficiency in most of the hybrid automatic retransmission request mechanisms in the prior art, can adaptively adjust the retransmission time threshold value according to the orbit type of the satellite, and optimizes a network communication mechanism.
Fig. 3 is a flowchart of another method for dynamically adjusting retransmission threshold in non-terrestrial network transmission according to an embodiment of the present invention, as shown in fig. 3, including:
step S201, determining the orbit type of the currently connected satellite under the condition that the terminal equipment is detected to adopt a non-ground network for data transmission.
Step S202, determining a corresponding retransmission threshold interval according to the track type, wherein the retransmission threshold interval records a retransmission time threshold for comparison during data packet retransmission.
Step 203, determining the current data packet congestion condition of the terminal device, and selecting a retransmission time threshold value in the retransmission threshold value interval according to the data packet congestion condition.
Step S204, triggering retransmission of the data packet based on the retransmission time threshold and the transmission time of the data packet.
Step 205, recovering the retransmission time threshold as a system default value when detecting that the terminal device adopts the ground network to perform data transmission.
In one embodiment, when the terminal device is detected to use the ground network for data transmission, the threshold value of the response recovery retransmission time is a default value of the system. The default system value may be a value originally configured in the HARQ mechanism. The scheme realizes the adjustment of the self-adaptive retransmission threshold value according to different network connection conditions.
The method comprises the steps that under the condition that the fact that the terminal equipment adopts a non-ground network to conduct data transmission is detected, the track type of a currently connected satellite is determined; determining a corresponding retransmission threshold interval according to the track type, wherein the retransmission threshold interval records a retransmission time threshold for comparison during data packet retransmission; determining the current data packet congestion condition of the terminal equipment, and selecting a retransmission time threshold value in the retransmission threshold value interval according to the data packet congestion condition; and triggering retransmission of the data packet based on the retransmission time threshold and the transmission time of the data packet. The scheme solves the problems of fixed retransmission time threshold value, lack of a reasonable adjustment mechanism and low data transmission efficiency in most of the hybrid automatic retransmission request mechanisms in the prior art, can adaptively adjust the retransmission time threshold value according to the orbit type of the satellite, and optimizes a network communication mechanism.
Fig. 4 is a flowchart of another method for dynamically adjusting retransmission threshold in non-terrestrial network transmission according to an embodiment of the present invention, as shown in fig. 4, including:
step S301, determining the connected satellites according to the current position of the terminal equipment and the historical signal-to-noise ratio in the recorded satellite list, and establishing network connection.
In one embodiment, when using a non-terrestrial network for data transmission, upon establishing a communication connection with a satellite, the connected satellite is determined based on the current location of the terminal device and the historical signal-to-noise ratio in the recorded list of satellites. Optionally, a satellite with a high historical signal to noise ratio is selected to establish a communication connection. Thereby further ensuring the communication quality of data transmission of the non-ground network.
Step S302, determining the orbit type of the currently connected satellite under the condition that the terminal equipment is detected to adopt a non-ground network for data transmission.
Step S303, determining a corresponding retransmission threshold interval according to the track type, wherein the retransmission threshold interval records a retransmission time threshold for comparison during data packet retransmission.
Step S304, determining the current data packet congestion condition of the terminal equipment, and selecting a retransmission time threshold value in the retransmission threshold value interval according to the data packet congestion condition.
Step S305, triggering retransmission of the data packet based on the retransmission time threshold and the transmission time of the data packet.
The method comprises the steps that under the condition that the fact that the terminal equipment adopts a non-ground network to conduct data transmission is detected, the track type of a currently connected satellite is determined; determining a corresponding retransmission threshold interval according to the track type, wherein the retransmission threshold interval records a retransmission time threshold for comparison during data packet retransmission; determining the current data packet congestion condition of the terminal equipment, and selecting a retransmission time threshold value in the retransmission threshold value interval according to the data packet congestion condition; and triggering retransmission of the data packet based on the retransmission time threshold and the transmission time of the data packet. The scheme solves the problems of fixed retransmission time threshold value, lack of a reasonable adjustment mechanism and low data transmission efficiency in most of the hybrid automatic retransmission request mechanisms in the prior art, can adaptively adjust the retransmission time threshold value according to the orbit type of the satellite, and optimizes a network communication mechanism.
Fig. 5 is a block diagram of a module structure of a retransmission threshold dynamic adjustment device in non-terrestrial network transmission according to an embodiment of the present invention, where the system is configured to execute the retransmission threshold dynamic adjustment method in non-terrestrial network transmission according to the foregoing embodiment, and the system has a functional module and beneficial effects corresponding to the execution method. As shown in fig. 5, the system specifically includes:
a type determining module 101 configured to determine an orbit type of a currently connected satellite in case that it is detected that the terminal device performs data transmission using a non-terrestrial network;
the threshold determining module 102 is configured to determine a corresponding retransmission threshold interval according to the track type, wherein the retransmission threshold interval records a retransmission time threshold for comparison during data packet retransmission, determine the current data packet congestion condition of the terminal equipment, and select a retransmission time threshold in the retransmission threshold interval according to the data packet congestion condition;
and the retransmission processing module 103 is configured to trigger retransmission of the data packet based on the retransmission time threshold and the transmission time of the data packet.
According to the scheme, under the condition that the terminal equipment is detected to adopt a non-ground network to carry out data transmission, determining the track type of the currently connected satellite; determining a corresponding retransmission threshold interval according to the track type, wherein the retransmission threshold interval records a retransmission time threshold for comparison during data packet retransmission; determining the current data packet congestion condition of the terminal equipment, and selecting a retransmission time threshold value in the retransmission threshold value interval according to the data packet congestion condition; and triggering retransmission of the data packet based on the retransmission time threshold and the transmission time of the data packet. The scheme solves the problems of fixed retransmission time threshold value, lack of a reasonable adjustment mechanism and low data transmission efficiency in most of the hybrid automatic retransmission request mechanisms in the prior art, can adaptively adjust the retransmission time threshold value according to the orbit type of the satellite, and optimizes a network communication mechanism.
In one possible embodiment, the apparatus further comprises an interval recording module configured to:
before determining the corresponding retransmission threshold interval according to the orbit type, determining and recording the corresponding retransmission threshold interval based on the transmission delay of the terminal equipment when the terminal equipment performs data transmission through satellites of different orbit types.
In one possible embodiment, the threshold determination module 102 is configured to:
acquiring the current retransmission process number of the terminal equipment and the data length of a retransmission queue;
and determining the current data packet congestion condition of the terminal equipment according to the retransmission process number and the data length of the retransmission queue.
In one possible embodiment, the threshold determination module 102 is configured to:
determining that the current data packet congestion condition is congestion under the condition that the data length of the retransmission queue is larger than the preset length and the number of retransmission processes is smaller than the preset number;
determining that the current data packet congestion condition is normal under the condition that the data length of the retransmission queue is larger than the preset length and the number of retransmission processes is not smaller than the preset number;
determining that the current data packet congestion condition is not congestion under the condition that the data length of the retransmission queue is not greater than the preset length and the number of retransmission processes is not less than the preset number;
and under the condition that the data length of the retransmission queue is not greater than the preset length and the number of retransmission processes is smaller than the preset number, determining that the current data packet congestion condition is normal.
In one possible embodiment, the retransmission threshold interval includes a retransmission minimum threshold, a retransmission intermediate threshold, and a retransmission maximum threshold, and the threshold determining module 102 is configured to:
selecting the retransmission minimum threshold value and the retransmission time threshold value under the condition that the data packet is congested;
selecting the retransmission intermediate threshold value and the retransmission time threshold value under the condition that the data packet congestion condition is normal;
and selecting the retransmission maximum threshold value and the retransmission time threshold value under the condition that the data packet is not congested.
In a possible embodiment, the retransmission processing module 103 is further configured to:
and recovering the retransmission time threshold value to be a system default value under the condition that the terminal equipment is detected to adopt the ground network to carry out data transmission.
In one possible embodiment, before said determining the orbit type of the currently connected satellite, the method further comprises:
and determining the connected satellite according to the current position of the terminal equipment and the historical signal-to-noise ratio in the recorded satellite list, and establishing network connection.
Fig. 6 is a schematic structural diagram of a retransmission threshold dynamic adjustment device in non-terrestrial network transmission according to an embodiment of the present invention, where, as shown in fig. 6, the device includes a processor 201, a memory 202, an input device 203, and an output device 204; the number of processors 201 in the device may be one or more, one processor 201 being taken as an example in fig. 6; the processor 201, memory 202, input devices 203, and output devices 204 in the apparatus may be connected by a bus or other means, for example in fig. 6. The memory 202 is used as a computer readable storage medium for storing software programs, computer executable programs and modules, such as program instructions/modules corresponding to the retransmission threshold dynamic adjustment method in non-terrestrial network transmission according to the embodiments of the present invention. The processor 201 executes various functional applications of the device and data processing by running software programs, instructions and modules stored in the memory 202, i.e. implements the retransmission threshold dynamic adjustment method in non-terrestrial network transmission described above. The input means 203 may be used to receive entered numeric or character information and to generate key signal inputs related to user settings and function control of the device. The output device 204 may include a display device such as a display screen.
Embodiments of the present invention also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are for performing a method of dynamically adjusting retransmission thresholds in non-terrestrial network transmissions, the method comprising:
under the condition that the terminal equipment is detected to adopt a non-ground network to carry out data transmission, determining the track type of the currently connected satellite;
determining a corresponding retransmission threshold interval according to the track type, wherein the retransmission threshold interval records a retransmission time threshold for comparison during data packet retransmission;
determining the current data packet congestion condition of the terminal equipment, and selecting a retransmission time threshold value in the retransmission threshold value interval according to the data packet congestion condition;
and triggering retransmission of the data packet based on the retransmission time threshold and the transmission time of the data packet.
It should be noted that, in the embodiment of the retransmission threshold dynamic adjustment method system in the non-terrestrial network transmission, each unit and module included are only divided according to the functional logic, but not limited to the above-mentioned division, so long as the corresponding functions can be realized; in addition, the specific names of the functional units are also only for distinguishing from each other, and are not used to limit the protection scope of the embodiments of the present invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the embodiments of the present invention are not limited to the particular embodiments described herein, but are capable of numerous obvious changes, rearrangements and substitutions without departing from the scope of the embodiments of the present invention. Therefore, while the embodiments of the present invention have been described in connection with the above embodiments, the embodiments of the present invention are not limited to the above embodiments, but may include many other equivalent embodiments without departing from the spirit of the embodiments of the present invention, and the scope of the embodiments of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The retransmission threshold dynamic adjustment method in non-ground network transmission is characterized by comprising the following steps:
under the condition that the terminal equipment is detected to adopt a non-ground network to carry out data transmission, determining the track type of the currently connected satellite;
determining a corresponding retransmission threshold interval according to the track type, wherein the retransmission threshold interval records a retransmission time threshold for comparison during data packet retransmission;
determining the current data packet congestion condition of the terminal equipment, and selecting a retransmission time threshold value in the retransmission threshold value interval according to the data packet congestion condition;
and triggering retransmission of the data packet based on the retransmission time threshold and the transmission time of the data packet.
2. The method for dynamically adjusting retransmission threshold in non-terrestrial network transmission according to claim 1, further comprising, before the determining the corresponding retransmission threshold interval according to the track type:
and determining and recording a corresponding retransmission threshold interval based on the transmission delay when the terminal equipment performs data transmission through satellites of different orbit types.
3. The method for dynamically adjusting retransmission threshold in non-terrestrial network transmission according to claim 1, wherein the determining a current packet congestion condition of the terminal device comprises:
acquiring the current retransmission process number of the terminal equipment and the data length of a retransmission queue;
and determining the current data packet congestion condition of the terminal equipment according to the retransmission process number and the data length of the retransmission queue.
4. The method for dynamically adjusting retransmission threshold in non-terrestrial network transmission according to claim 3, wherein the determining the current packet congestion of the terminal device according to the number of retransmission processes and the data length of the retransmission queue comprises:
determining that the current data packet congestion condition is congestion under the condition that the data length of the retransmission queue is larger than the preset length and the number of retransmission processes is smaller than the preset number;
determining that the current data packet congestion condition is normal under the condition that the data length of the retransmission queue is larger than the preset length and the number of retransmission processes is not smaller than the preset number;
determining that the current data packet congestion condition is not congestion under the condition that the data length of the retransmission queue is not greater than the preset length and the number of retransmission processes is not less than the preset number;
and under the condition that the data length of the retransmission queue is not greater than the preset length and the number of retransmission processes is smaller than the preset number, determining that the current data packet congestion condition is normal.
5. The method for dynamically adjusting retransmission threshold in non-terrestrial network transmission according to claim 4, wherein the retransmission threshold interval includes a retransmission minimum threshold, a retransmission intermediate threshold, and a retransmission maximum threshold, and the selecting a retransmission time threshold within the retransmission threshold interval according to the packet congestion condition includes:
selecting the retransmission minimum threshold value and the retransmission time threshold value under the condition that the data packet is congested;
selecting the retransmission intermediate threshold value and the retransmission time threshold value under the condition that the data packet congestion condition is normal;
and selecting the retransmission maximum threshold value and the retransmission time threshold value under the condition that the data packet is not congested.
6. The method for dynamically adjusting retransmission thresholds in non-terrestrial network transmissions according to any of claims 1-5, further comprising:
and recovering the retransmission time threshold value to be a system default value under the condition that the terminal equipment is detected to adopt the ground network to carry out data transmission.
7. The method for dynamically adjusting retransmission thresholds in non-terrestrial network transmissions according to any of claims 1-5, further comprising, prior to the determining the type of orbit of the currently connected satellite:
and determining the connected satellite according to the current position of the terminal equipment and the historical signal-to-noise ratio in the recorded satellite list, and establishing network connection.
8. The retransmission threshold dynamic adjustment device in non-ground network transmission is characterized by comprising:
the type determining module is configured to determine the track type of the currently connected satellite under the condition that the terminal equipment is detected to adopt a non-ground network for data transmission;
the threshold determining module is configured to determine a corresponding retransmission threshold interval according to the track type, wherein the retransmission threshold interval records retransmission time thresholds used for comparison during data packet retransmission, determines the current data packet congestion condition of the terminal equipment, and selects the retransmission time thresholds in the retransmission threshold interval according to the data packet congestion condition;
and the retransmission processing module is configured to trigger retransmission of the data packet based on the retransmission time threshold and the sending time of the data packet.
9. A retransmission threshold dynamic adjustment device in non-terrestrial network transmission, the device comprising: one or more processors; storage means for storing one or more programs that, when executed by the one or more processors, cause the one or more processors to implement the method of dynamic adjustment of retransmission thresholds in non-terrestrial network transmissions as claimed in any one of claims 1-7.
10. A storage medium storing computer executable instructions which when executed by a computer processor are for performing the retransmission threshold dynamic adjustment method in non-terrestrial network transmission according to any of claims 1-7.
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