CN115052359B - Data transmission method and device, electronic equipment and storage medium - Google Patents
Data transmission method and device, electronic equipment and storage medium Download PDFInfo
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- CN115052359B CN115052359B CN202210695455.4A CN202210695455A CN115052359B CN 115052359 B CN115052359 B CN 115052359B CN 202210695455 A CN202210695455 A CN 202210695455A CN 115052359 B CN115052359 B CN 115052359B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/06—Airborne or Satellite Networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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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
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application provides a data transmission method, a data transmission device, an electronic device and a storage medium, wherein the data transmission method comprises the following steps: after receiving the return data from the first satellite, performing data processing on the return data, and putting the processed return data into a forward sending queue as forward data according to the priority; adjusting a transmission direction of the first satellite for the first forward data based on an orbit of a third satellite receiving the first forward data; and for second forward data which is in the same priority level as the first forward data, if the direction of a fourth satellite receiving the second forward data is located in the beam range of the first satellite in the transmitting direction, placing the second forward data behind the first forward data, and uploading the forward data to the first satellite based on the adjusted forward transmitting queue so that the first satellite transmits the forward data to a third satellite/a fourth satellite. By the method, the transmitting efficiency of the forward data is improved, and the service life of the satellite is indirectly prolonged.
Description
Technical Field
The present application relates to the field of data communication technologies, and in particular, to a data transmission method, an apparatus, an electronic device, and a storage medium.
Background
In the field of data communication, when data transmission is performed, each data in a queue is generally transmitted according to a first-in first-out method. When data transmission is performed between satellites, the two satellites are required to maintain corresponding angles to realize data transmission, and when the angles between the two satellites are not aligned, or a receiving satellite is not within the transmitting range of a transmitting satellite, the transmitting angle of the transmitting satellite needs to be adjusted.
The inventor finds in research that, when data is transmitted between two satellites according to the first-in first-out principle in the prior art, since each satellite to which data arrives is unknown, the angle of a transmitting satellite is adjusted according to the position of the satellite receiving the data each time data is transmitted, and thus the loss of the transmitting satellite and the low data transmission efficiency are caused by frequently adjusting the angle of the transmitting satellite.
Disclosure of Invention
In view of this, embodiments of the present application provide a data transmission method, an apparatus, an electronic device, and a storage medium, so as to help indirectly improve the service life of a satellite by reducing the problem of low data transmission efficiency caused by switching angles of a transmitting satellite.
In a first aspect, an embodiment of the present application provides a data transmission method, where the method is applied to an earth station, and includes:
after receiving return data sent by at least one first satellite, performing data processing on the return data, and putting the processed return data into a forward sending queue as forward data based on the priority of each return data; the return data is received by the first satellite from a second satellite;
for each first forward data in the forward transmission queue, adjusting a transmission direction of the first satellite based on an orbit of a third satellite receiving the first forward data; a position of the first forward data in the forward transmit queue is determined based on a length of the forward transmit queue;
for each second forward data in the forward transmission queue, which is at the same priority as the first forward data, if the direction of a fourth satellite receiving the second forward data is located within the beam range of the first satellite in the transmission direction, adjusting the second forward data to be behind the first forward data, and uploading the forward data to the first satellite based on the adjusted forward transmission queue, so that the first satellite transmits the first forward data/the second forward data to the third satellite/the fourth satellite.
In one possible embodiment, the data processing of the return data includes:
analyzing the return data by adopting a data format corresponding to the communication protocol based on the communication protocol type carried in the return data to obtain a seven-element group of the return data;
judging whether the return data meet preset communication requirements or not based on a communication protocol, data length, data type, identification of a second satellite, identification of a target satellite, a time code and a safety code in the seven-tuple; the target satellite is the third satellite or the fourth satellite;
and if the return data meet the communication requirement, storing the processed return data serving as the forward data into the forward sending queue.
In one possible embodiment, the communication requirements include:
the communication protocol is in a predefined communication protocol list, the identifier of the second satellite is in a predefined service list, the orbital element of the target satellite is stored in a database, and the password calculation result is consistent with the security code in the seven-element group; the cryptographic calculation result is calculated by the earth station based on six elements of the seven-tuple except the security code and a calculation method allocated to the second satellite in advance.
In one possible embodiment, before uploading the forward data to the first satellite based on the adjusted forward transmission queue, the method further includes:
for each of the forward data, determining an orbit of a target satellite receiving the forward data;
determining a beam interval related to the first satellite based on a rotation interval of the transmitting direction of the first satellite and a beam range corresponding to each transmitting direction;
if the azimuth of the target satellite at the target moment is not in the beam interval, the transmitting task of the forward data is broadcast publicly, and the forward data is transmitted to a switching earth station responding to the transmitting task; the target time is an expected transmission time of the first satellite to transmit the forward data.
In one possible embodiment, transmitting said forward data to a transit earth station responsive to said transmission mission comprises:
transmitting the forward data to the transit earth station over a communication channel if the communication channel exists with the transit earth station;
and if no communication channel exists between the first satellite and the transit earth station, sending the forward data to the first satellite, so that the first satellite sends the forward data to a transit satellite corresponding to the transit earth station and downloads the data to the transit earth station through the transit satellite.
In one possible embodiment, before uploading the forward data to the first satellite based on the adjusted forward transmission queue, the method further includes:
determining an identification of a target satellite; the target satellite is the third satellite or the fourth satellite;
and if an upper injection rule is set when the target satellite registers to access the network, modifying the forward data according to the upper injection rule.
In one possible embodiment, the position of the first forward data in the forward transmit queue is determined based on the length of the forward transmit queue, including:
determining a first value representing the amount of the forward data in the forward transmission queue at a current time;
if the first numerical value is larger than a preset threshold value, squaring the first numerical value to obtain a second numerical value;
taking the integer part of the second numerical value as a reference value, and calculating a double value of the reference value;
taking the sum of the double-valued sum and the first sequence number as a target sequence number, and determining the forward data which is sequenced into the target sequence number in the forward sending queue as the first forward data; the first sequence number is a sequence number value of the first forward data in the forward sending queue.
In a second aspect, embodiments of the present application further provide a data transmission apparatus, where the apparatus resides at an earth station, and includes:
the receiving unit is used for processing the return data after receiving the return data sent by at least one first satellite, and putting the processed return data into a forward sending queue as forward data based on the priority of each return data; the return data is received by the first satellite from a second satellite;
a direction adjusting unit, configured to adjust, for each first forward data in the forward transmission queue, a transmission direction of a first satellite based on an orbit of a third satellite receiving the first forward data; a position of the first forward data in the forward transmit queue is determined based on a length of the forward transmit queue;
a queue adjusting unit, configured to, for each second forward data in the forward transmission queue that is at the same priority as the first forward data, adjust the second forward data to be subsequent to the first forward data if a direction of a fourth satellite receiving the second forward data is located within a beam range of the first satellite in the transmission direction, and upload the forward data to the first satellite based on the adjusted forward transmission queue, so that the first satellite transmits the first forward data/the second forward data to the third satellite/the fourth satellite.
In a possible embodiment, the receiving unit, when performing data processing on the return data, is configured to:
analyzing the return data by adopting a data format corresponding to the communication protocol based on the communication protocol type carried in the return data to obtain a seven-element group of the return data;
judging whether the return data meet preset communication requirements or not based on a communication protocol, data length, data type, identification of a second satellite, identification of a target satellite, a time code and a safety code in the seven-tuple; the target satellite is the third satellite or the fourth satellite;
and if the return data meet the communication requirement, the processed return data is taken as the forward data and stored in the forward sending queue.
In one possible embodiment, the communication requirements include:
the communication protocol is in a predefined communication protocol list, the identifier of the second satellite is in a predefined service list, the orbital element of the target satellite is stored in a database, and the password calculation result is consistent with the security code in the seven-element group; the cryptographic calculation result is calculated by the earth station based on six elements of the seven-tuple except the security code and a calculation method allocated to the second satellite in advance.
In one possible embodiment, the apparatus further comprises:
a first determining unit, configured to determine, for each piece of forward data, an orbit of a target satellite that receives the forward data before uploading the forward data to the first satellite based on the adjusted forward transmission queue;
a second determining unit, configured to determine a beam interval related to the first satellite based on a rotation interval of transmission directions of the first satellite and a beam range corresponding to each of the transmission directions;
a broadcasting unit, configured to broadcast a transmission task of the forward data in public and transmit the forward data to a transit earth station responding to the transmission task if the azimuth of the target satellite at the target time is not within the beam interval; the target time is an expected transmission time of the first satellite to transmit the forward data.
In a possible embodiment, the broadcasting unit, when transmitting the forward data to the transit earth station responding to the transmission task, is specifically configured to:
transmitting the forward data to the transit earth station over a communication channel if the communication channel exists with the transit earth station;
and if no communication channel exists between the first satellite and the transit earth station, sending the forward data to the first satellite, so that the first satellite sends the forward data to a transit satellite corresponding to the transit earth station and downloads the data to the transit earth station through the transit satellite.
In one possible embodiment, the apparatus further comprises:
a third determining unit, configured to determine an identifier of a target satellite before uploading the forward data to the first satellite based on the adjusted forward transmission queue; the target satellite is the third satellite or the fourth satellite;
and the data modification unit is used for modifying the forward data according to the upper injection rule if the upper injection rule is set when the target satellite is registered to access the network.
In one possible embodiment, the apparatus further comprises:
a fourth determining unit, configured to determine a first value at a current time, where the first value is used to indicate the amount of the forward data in the forward transmission queue;
the first calculation unit is used for squaring the first numerical value to obtain a second numerical value if the first numerical value is larger than a preset threshold value;
a second calculation unit configured to calculate a double value of the reference value using an integer part of the second numerical value as the reference value;
a fifth determining unit, configured to determine, as the first forward data, the forward data sorted as the target sequence number in the forward transmission queue, by using a sum of the doubled value and the first sequence number as the target sequence number; the first sequence number is a sequence number value of the first forward data in the forward sending queue.
In a third aspect, an embodiment of the present application further provides an electronic device, including: a processor, a storage medium and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor and the storage medium communicating via the bus when the electronic device is operating, the processor executing the machine-readable instructions to perform the steps of the data transmission method according to any one of the first aspect.
In a fourth aspect, the present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the steps of the data transmission method according to any one of the first aspect.
The data transmission method, the data transmission device, the electronic equipment and the storage medium are applied to an earth station, the earth station is communicated with a first satellite, the first satellite receives data from a second satellite, the first satellite downloads the data to the earth station, the earth station processes the data of the returned data after receiving the returned data downloaded by the first satellite, and the processed returned data are placed into a forward sending queue as forward data according to the priority of the returned data. And aiming at each forward data in the forward sending queue, after determining first forward data from all forward data according to the length of the forward sending queue, adjusting the transmitting direction of the first satellite according to the running orbit of a third satellite after the identification of the third satellite marked in the first forward data and used for receiving the first forward data, wherein the beam range of the first satellite is determined in the transmitting direction. After the transmitting direction of the first satellite is adjusted, for each second forward data in which the first forward data is at the same priority, if the direction of a fourth satellite receiving the second forward data is within the beam range in the transmitting direction fixed by the first satellite, the second forward data is adjusted to be behind the first forward data, so that the forward transmission queue is adjusted, and each forward data in the adjusted forward transmission queue is transmitted to the third satellite/fourth satellite.
Compared with the scheme of data transmission between two satellites according to the first-in first-out principle in the prior art, the embodiment of the application can enable the first satellite to send out a plurality of forward data in the same transmitting direction after the second forward data in the same priority are put into the first forward data, so that the number of times of adjusting the transmitting direction of the first satellite is reduced, the problems of loss and low data transmission efficiency of the transmitting satellite are reduced, and the service life of the satellite is indirectly prolonged.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 shows a flowchart of a data transmission method provided in an embodiment of the present application.
Fig. 2 shows a flowchart of a data forwarding method provided in an embodiment of the present application.
Fig. 3 is a schematic diagram illustrating an overall flow of data transmission according to an embodiment of the present application.
Fig. 4 shows a schematic structural diagram of a data transmission apparatus according to an embodiment of the present application.
Fig. 5 shows a schematic structural diagram of an electronic device provided in an embodiment of the present application.
Detailed Description
In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it should be understood that the drawings in the present application are for illustrative and descriptive purposes only and are not used to limit the scope of protection of the present application. Additionally, it should be understood that the schematic drawings are not necessarily drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of the present application. It should be understood that the operations of the flow diagrams may be performed out of order, and steps without logical context may be performed in reverse order or simultaneously. In addition, one skilled in the art, under the guidance of the present disclosure, may add one or more other operations to the flowchart, or may remove one or more operations from the flowchart.
In addition, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that in the embodiments of the present application, the term "comprising" is used to indicate the presence of the features stated hereinafter, but does not exclude the addition of further features.
It should be noted that the apparatuses, electronic devices, and the like according to the embodiments of the present application may be executed on a single server or may be executed on a group of servers. The server group may be centralized or distributed. In some embodiments, the server may be local or remote to the terminal. For example, the server may access information and/or data stored in the service requester terminal, the service provider terminal, or the database, or any combination thereof, via the network. As another example, the server may be directly connected to at least one of the service requester terminal, the service provider terminal and the database to access the stored information and/or data. In some embodiments, the server may be implemented on a cloud platform; by way of example only, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud (community cloud), a distributed cloud, an inter-cloud, a multi-cloud, and the like, or any combination thereof.
With the rapid development of the space data transmission technology, the space interplanetary link data transmission technology is rapidly developed, interplanetary link communication generally comprises two modes, one mode is inter-satellite direct communication, namely a satellite I directly sends data to a satellite II; the other is to realize inter-satellite communication in a bridging mode, namely, the first satellite sends data to the third satellite instead of directly sending data to the second satellite, and then forwards the data to the second satellite through the third satellite. In the embodiment of the present application, the satellite three is used for providing a data transmission path, and the satellite used for data transmission is referred to as a bridging satellite, and the bridging satellite includes a communication satellite and a relay satellite.
Fig. 1 shows a flowchart of a data transmission method provided in an embodiment of the present application, and as shown in fig. 1, the method includes the following steps:
Specifically, in this embodiment of the present application, the first satellite is a bridge satellite, the second satellite is a terminal device that transmits data to the first satellite, and the third satellite and the fourth satellite are terminal devices that receive data from the first satellite, and the second satellite, the third satellite and the fourth satellite may be any spacecraft capable of transmitting data and receiving data, where the spacecraft includes but is not limited to: rockets, space shuttles, low orbit satellites, medium orbit satellites, high orbit satellites, airplanes, and the like. Each bridging satellite corresponds to one earth station, the earth station is used for processing the return data downloaded by the bridging satellite, processing the return data, converting the return data into forward data, putting the forward data into a forward sending queue, and finally sending the forward data in the forward sending queue to the bridging satellite, so that the forward data is forwarded to other spacecrafts through the bridging satellite.
Return data is data that is downloaded into the earth station by the first satellite after receiving data from the second satellite; forward data is data uploaded into a first satellite by an earth station. Each data received by the first satellite carries a priority identification, and thus each return data carries a priority. After receiving the return data downloaded by the first satellite, the earth station performs data processing on the return data, such as data cleaning, data conversion, judgment on whether the data is in compliance, and the like, obtains forward data corresponding to the return data one to one after performing data processing on the return data, and sequentially puts the forward data into a forward sending queue according to priority.
It should be noted that when the priority of each forward data is the same, the forward data in the forward transmission queue may be arranged according to the receiving time of the return data corresponding to the forward data received, or according to the transmitting time of the return data transmitted by the second satellite.
Specifically, the earth station is connected to the database, and is configured to obtain operation information, registration information, and the like of each of the spacecraft and the bridged satellite stored in the database. The first forward data is at least one forward data in a forward transmission queue, and the position of the first forward data in the forward transmission queue is determined according to the length of the forward transmission queue (namely, the amount of the forward data in the forward transmission queue). The forward data may be one or more, the longer the forward queue, the greater the number of first forward data, the later each first forward data is located, and the greater the interval between every two first forward data.
Each forward data (corresponding backward data) is provided with an identifier of a target satellite for receiving the forward data, and when the forward data is the first forward data, the target satellite is a third satellite; and when the forward data is the second forward data, the target satellite is a fourth satellite. Thus, for each first forward data in the forward transmit queue, the earth station can determine a third satellite for receiving the first forward data based on the identification of the target satellite in the first forward data. And after the third satellite is determined, acquiring the orbital element of the third satellite from the database, and determining the position of the third satellite at each time point according to the orbital element, namely determining the running orbit of the third satellite. And after the operation orbit of the third satellite is determined, adjusting the transmitting direction of the first satellite according to the operation orbit of the third satellite, so that the first satellite can transmit the first forward data to the third satellite in the transmitting direction.
It should be noted that the above steps are required to ensure that the third satellite is within the transmittable range of the first satellite, that is, for each first forward data in the forward transmission queue, when the third satellite receiving the first forward data is within the beam interval involved in the first satellite, the transmitting direction of the first satellite is adjusted based on the orbit of the third satellite. In another possible embodiment, the first forward data may also be forward data that arrives at the earth station earliest among the plurality of forward data corresponding to each priority in the forward transmission queue, that is, one first forward data is determined among the plurality of forward data corresponding to each priority.
Specifically, after the first forward data is determined, according to the priority of the first forward data, second forward data with the same priority as the first forward data in the forward data that is not currently transmitted in the forward transmission queue is determined, according to a target satellite (that is, a fourth satellite for receiving the second forward data) set in the second forward data, the number of orbits of the fourth satellite is obtained from the database, so that the orbit of the fourth satellite at each time point is determined, if the direction of the fourth satellite (the direction of the fourth satellite when the second forward data is expected to be transmitted) is located in the beam range of the first satellite in the transmission direction, the first satellite and the fourth satellite can implement data transmission, that is, the first satellite can transmit the second forward data to the fourth satellite in the transmission direction. The second forward data is queued after the first forward data, and after each second forward data is adjusted, an adjusted forward transmit queue results. And transmitting each forward data to the first satellite based on the adjusted forward transmission queue so as to be transmitted to the target satellite through the first satellite.
The data transmission method provided by the embodiment of the application is applied to an earth station, the earth station is communicated with a first satellite, the first satellite receives data from a second satellite, the first satellite downloads the data to the earth station, the earth station processes the data of the returned data after receiving the returned data downloaded by the first satellite, and the processed returned data is used as forward data to be put into a forward sending queue according to the priority of the returned data. And aiming at each forward data in the forward transmission queue, after determining first forward data from all the forward data according to the length of the forward transmission queue, adjusting the transmitting direction of the first satellite according to the running orbit of a third satellite marked in the first forward data and used for receiving the first forward data, wherein the first satellite determines a beam range in the transmitting direction. After the transmission direction of the first satellite is adjusted, for each second forward data whose priority is the same as that of the first forward data, if the direction of a fourth satellite receiving the second forward data is within the beam range of the transmission direction fixed by the first satellite, the second forward data is adjusted to be behind the first forward data, thereby adjusting the forward transmission queue, and each forward data in the adjusted forward transmission queue is transmitted to the third satellite/fourth satellite.
Compared with the scheme of data transmission between two satellites according to the first-in first-out principle in the prior art, the embodiment of the application can enable the first satellite to send out a plurality of forward data in the same transmitting direction after the second forward data in the same priority are put into the first forward data, so that the number of times of adjusting the transmitting direction of the first satellite is reduced, the problems of loss and low data transmission efficiency of the transmitting satellite are reduced, and the service life of the satellite is indirectly prolonged.
In one possible embodiment, the data processing of the return data in step 101 includes the following steps:
and step 110, analyzing the return data by adopting a data format corresponding to the communication protocol based on the communication protocol type carried in the return data to obtain a seven-tuple of the return data.
Specifically, the relationship between the communication protocol type and the data format is preset, and the specific information in the return data, that is, the heptad, can be obtained by analyzing the return data in the data format corresponding to the communication protocol.
Step 111, judging whether the return data meets preset communication requirements or not based on a communication protocol, data length, data type, identification of a second satellite, identification of a target satellite, a time code and a safety code in the seven-tuple; the target satellite is the third satellite or the fourth satellite.
Specifically, after the seven-tuple is analyzed in step 111, the seven-tuple includes a communication protocol, a data length, a data type, an identifier of the second satellite, an identifier of the target satellite, a time code, and a security code, respectively. And judging the data in the seven-element group through the analyzed seven-element group, and judging whether the returned data meets the communication requirement.
And 112, if the return data meets the communication requirement, saving the processed return data serving as the forward data into the forward sending queue.
Specifically, after judging whether the seven-element group of the return data meets the communication requirement according to step 111, the return data which does not meet the communication requirement is discarded, and for the return data which meets the communication requirement, the return data after data processing is stored as forward data, and the forward data is put into the forward sending queue.
In one possible embodiment, the communication requirements include:
the communication protocol is in a predefined communication protocol list, the identifier of the second satellite is in a predefined service list, the orbit number of the target satellite is stored in a database, and the password calculation result is consistent with the security code in the seven-element group; the cryptographic calculation result is calculated by the earth station based on six elements of the seven-tuple except the security code and a calculation method allocated to the second satellite in advance.
Specifically, if the identifier corresponding to the communication protocol is not in the predefined communication protocol list, the return data is discarded.
When the service agreement is signed for the spacecraft, the identification corresponding to the spacecraft is added into the service list, and when the identification of the second satellite in the seven-tuple is not in the predefined service list, the service agreement is not signed for the second satellite, the data transmission service is not provided for the second satellite, and the return data transmitted by the second satellite is discarded.
Meanwhile, after a service agreement is signed for the spacecraft, the orbit number of each satellite is sent to a database in advance, or if the return data carries the orbit number, the orbit number of the spacecraft carried in the return data is directly stored in the database. If the orbit root of the target satellite can be found from the database according to the identification of the target satellite in the seven-tuple of the return data, the data transmission can be completed according to the orbit root, and if the orbit root of the target satellite cannot be determined, the data cannot be sent to the target satellite, and the return data is discarded.
After each spacecraft is registered, an encryption algorithm is assigned to each spacecraft, and the relationship between the encryption algorithm and the spacecraft is stored in a database. The password calculation result is obtained by substituting the communication protocol, the data length, the data type, the identifier of the second satellite, the identifier of the target satellite and the time code into an encryption algorithm as initial data, wherein the encryption algorithm corresponds to the second satellite.
Fig. 2 shows a flowchart of a data forwarding method provided by an embodiment of the present application, and as shown in fig. 2, in a possible implementation, before step 103 is executed to upload the forward data to the first satellite based on the adjusted forward transmission queue, the method further includes the following steps:
Specifically, each forward data carries an identifier of a target satellite, and the orbital element of the target satellite receiving the forward data is determined from the database. When the forward data is the first forward data, the target satellite is the third satellite, and when the forward data is the second forward data, the target satellite is the fourth satellite. And determining the operation orbit of the target satellite according to the orbit number of the target satellite, namely the position of the target satellite at each time point.
Specifically, the transmitting direction of the first satellite can rotate within a certain range, so that a rotating interval is formed, and the transmitting direction of the first satellite rotates within the rotating interval. Meanwhile, when the first satellite transmits data in each transmitting direction, a beam interval is formed, and the beam interval related to the first satellite is determined according to the rotating interval of the first satellite.
Specifically, the position of the target satellite at the target time is determined according to the motion orbit of the target satellite, and after the operation orbit of the target satellite is determined according to step 201, the position of the target satellite at each time point can be determined.
In the embodiment of the present application, when the azimuth of the target satellite at the target time is not within the beam interval related to the first satellite, the task of transmitting the forward data is distributed in a public broadcast manner so that the other earth stations acquire basic information of the forward data, and if there is another relay earth station responding to the task of transmitting, the forward data is transmitted to the responding relay earth station, so that the forward data is transmitted to the target satellite through the relay earth station. The sending task comprises basic identifications such as a communication protocol of forward data, a target satellite and the like.
In one possible embodiment, transmitting said forward data to a transit earth station responsive to said transmission mission, further in accordance with step 203, comprises the steps of:
and step 210, if a communication channel exists with the switching earth station, sending the forward data to the switching earth station through the communication channel.
In particular, if the earth station is in communication with a transit earth station, the earth station transmits forward data directly to the transit earth station without passing through a bridging satellite.
Step 211, if there is no communication channel with the transit earth station, sending the forward data to the first satellite, so that the first satellite sends the forward data to a transit satellite corresponding to the transit earth station, and downloads the data to the transit earth station through the transit satellite.
Specifically, if there is no communication path between the earth station and the transit earth station, the forward data is transmitted to the first satellite, and the forward data is transmitted to the transit satellite in communication with the transit earth station through the first satellite. The transit satellite downloads the forward data to the transit earth station to form return data of the transit earth station, and the transmission and processing methods of the return data by the transit earth station are the same as the data transmission methods in steps 101 to 103, and are not described herein again.
By the above method, when the first satellite cannot be connected to the target satellite, data is transmitted to the target satellite by reconnecting the transit earth station and the transit satellite.
In one possible embodiment, before the step 103 of uploading the forward data to the first satellite based on the adjusted forward transmission queue is executed, the method further includes the following steps:
determining an identification of a target satellite; the target satellite is the third satellite or the fourth satellite; and if an upper injection rule is set when the target satellite registers to access the network, modifying the forward data according to the upper injection rule.
Specifically, whether the target satellite has the upper note rule or not is judged according to the identification of the target satellite carried in the forward data, so that when the target satellite has the upper note rule, the forward data sent to the target satellite is modified, the modified forward data is sent to the first satellite, and the forward data meeting the upper note rule is sent to the target satellite through the first satellite.
It should be noted that, if the forward data is sent to the transit satellite corresponding to the transit earth station through the first satellite in step 211, the transit satellite is defaulted to have no upper-note rule, and the forward data is transparently forwarded.
In one possible embodiment, the position of the first forward data in the forward transmission queue is determined based on the length of the forward transmission queue, including the steps of:
determining a first value representing the amount of the forward data in the forward transmission queue at a current time; if the first numerical value is larger than a preset threshold value, squaring the first numerical value to obtain a second numerical value; taking the integer part of the second numerical value as a reference value, and calculating a double value of the reference value; taking the sum of the double-valued sequence number and the first sequence number as a target sequence number, and determining forward data sequenced into the target sequence number in the forward sending queue as the first forward data; the first sequence number is a sequence number value of the first forward data in the forward sending queue.
For example, in the embodiment of the present application, the preset threshold is 4, if there are 100 forward data in the forward transmission queue at the current time, the first value is 100, and the first value 100 > the preset threshold 4, then the first value is 100 ≧ the preset threshold 4
If the reference value is the second value, the reference value is 10, and the double value of the reference value is 2 × 10=20. If the sequence number of the first forward data in the forward transmission queue is 1, the first sequence number is 1, the value of the target sequence number =20+1=21, and the first forward data is the forward data sequenced as 21 in the forward transmission queue; if the sequence number of the first forward data in the forward transmission queue is 0, the first sequence number is 0, the value of the target sequence number =20+0=20, and the first forward data is the forward data sorted to 20 in the forward transmission queue.
Fig. 3 shows an overall flow diagram of data transmission provided in an embodiment of the present application, which specifically includes the following steps:
the second satellite transmits data to the first satellite, step 301.
The first satellite transmits the data as return data to the earth station, step 302.
And step 303, the earth station analyzes the return data by adopting a corresponding data format according to the communication protocol type of the return data to obtain a seven-tuple.
Step 304, determining whether the seven-tuple meets the communication requirement, if yes, entering step 305, otherwise, discarding.
And 305, the earth station sequentially puts the processed return data serving as forward data into a forward sending queue according to the priority.
Step 306, the earth station judges whether the target satellite receiving the forward data is in the beam interval according to the beam interval of the first satellite, if the target satellite is not in the beam interval, the earth station broadcasts the transmitting task of the forward data in a public way, and step 307-step 310 are executed; if the target satellite is within the beam interval, steps 311-315 are performed.
Step 307, if the target satellite is in the beam interval of the transit satellite, sending response information to the earth station.
And step 308, after receiving the response information, the earth station sends the forward data to the switching earth station.
After receiving the forward data, the transit earth station transmits the forward data to the transit satellite, step 309.
Step 310, forward data is sent to the third/fourth satellite.
In step 311, when the forward data is the first forward data, the earth station determines the transmitting direction of the first satellite and sends a direction adjusting instruction to the first satellite.
And step 312, the first satellite adjusts the direction according to the emission direction adjusting instruction and returns direction adjusting completion information to the earth station.
Step 313, if the fourth satellite receiving the second forward data is located in the beam range of the first satellite in the transmitting direction, adjusting the second forward data to be behind the first forward data.
Step 314, forward data is transmitted to the first satellite according to the adjusted forward transmission queue.
The first satellite transmits the forward data to the third/fourth satellite, step 315.
The contents of steps 301 to 315 can refer to the detailed description in the above embodiments, and are not repeated herein.
Fig. 4 shows a schematic structural diagram of a data transmission device provided in an embodiment of the present application, and as shown in fig. 4, the device includes: receiving section 401, direction adjusting section 402, and queue adjusting section 403.
A receiving unit 401, configured to perform data processing on return data sent by at least one first satellite after receiving the return data, and place the processed return data as forward data in a forward sending queue based on a priority of each return data; the return data is received by the first satellite from a second satellite.
A direction adjusting unit 402, configured to adjust, for each first forward data in the forward transmission queue, a transmission direction of a first satellite based on an orbit of a third satellite receiving the first forward data; a position of the first forward data in the forward transmit queue is determined based on a length of the forward transmit queue.
A queue adjusting unit 403, configured to, for each second forward data in the forward transmission queue that is at the same priority as the first forward data, adjust the second forward data to be behind the first forward data if a direction of a fourth satellite receiving the second forward data is located within a beam range of the first satellite in the transmission direction, and upload the forward data to the first satellite based on the adjusted forward transmission queue, so that the first satellite transmits the first forward data/the second forward data to the third satellite/the fourth satellite.
In a possible embodiment, the receiving unit, when performing data processing on the return data, is configured to:
and analyzing the return data by adopting a data format corresponding to the communication protocol based on the communication protocol type carried in the return data to obtain a seven-tuple of the return data.
Judging whether the return data meet preset communication requirements or not based on a communication protocol, data length, data type, identification of a second satellite, identification of a target satellite, a time code and a safety code in the seven-tuple; the target satellite is the third satellite or the fourth satellite.
And if the return data meet the communication requirement, storing the processed return data serving as the forward data into the forward sending queue.
In one possible embodiment, the communication requirements include:
the communication protocol is in a predefined communication protocol list, the identifier of the second satellite is in a predefined service list, the orbital element of the target satellite is stored in a database, and the password calculation result is consistent with the security code in the seven-element group; the cryptographic calculation result is calculated by the earth station based on six elements of the seven-tuple except the security code and a calculation method allocated to the second satellite in advance.
In one possible embodiment, the apparatus further comprises:
a first determining unit, configured to determine, for each piece of forward data, an orbit of a target satellite receiving the forward data before uploading the forward data to the first satellite based on the adjusted forward transmission queue.
And the second determining unit is used for determining the beam interval related to the first satellite based on the rotating interval of the transmitting direction of the first satellite and the beam range corresponding to each transmitting direction.
A broadcasting unit, configured to broadcast a transmission task of the forward data in public and transmit the forward data to a transit earth station responding to the transmission task if the azimuth of the target satellite at the target time is not within the beam interval; the target time is an expected transmission time of the first satellite to transmit the forward data.
In a possible embodiment, the broadcasting unit, when transmitting the forward data to the transit earth station responding to the transmission task, is specifically configured to:
if a communication channel exists with the transit earth station, transmitting the forward data to the transit earth station over the communication channel.
And if no communication channel exists between the first satellite and the transit earth station, sending the forward data to the first satellite, so that the first satellite sends the forward data to a transit satellite corresponding to the transit earth station and downloads the data to the transit earth station through the transit satellite.
In one possible embodiment, the apparatus further comprises:
a third determining unit, configured to determine an identifier of a target satellite before uploading the forward data to the first satellite based on the adjusted forward transmission queue; the target satellite is the third satellite or the fourth satellite.
And the data modification unit is used for modifying the forward data according to the upper note rule if the upper note rule is set when the target satellite registers to access the network.
In one possible embodiment, the apparatus further comprises:
a fourth determining unit, configured to determine a first value, which is used to indicate the amount of the forward data in the forward transmission queue, at the current time.
And the first calculation unit is used for squaring the first numerical value to obtain a second numerical value if the first numerical value is larger than a preset threshold value.
A second calculation unit for calculating a double value of the reference value using an integer part of the second numerical value as the reference value.
A fifth determining unit, configured to determine, as the first forward data, the forward data sorted as the target sequence number in the forward transmission queue, by using a sum of the doubled value and the first sequence number as the target sequence number; the first sequence number is a sequence number value of the first forward data in the forward sending queue.
The data transmission device provided by the embodiment of the application resides in an earth station, the earth station is in communication with a first satellite, the first satellite receives data from a second satellite, the first satellite downloads the data to the earth station, the earth station processes the data of the returned data after receiving the returned data downloaded by the first satellite, and the processed returned data are put into a forward sending queue as forward data according to the priority of the returned data. And aiming at each forward data in the forward sending queue, after determining first forward data from all forward data according to the length of the forward sending queue, adjusting the transmitting direction of the first satellite according to the running orbit of a third satellite after the identification of the third satellite marked in the first forward data and used for receiving the first forward data, wherein the beam range of the first satellite is determined in the transmitting direction. After the transmitting direction of the first satellite is adjusted, for each second forward data in which the first forward data is at the same priority, if the direction of a fourth satellite receiving the second forward data is within the beam range in the transmitting direction fixed by the first satellite, the second forward data is adjusted to be behind the first forward data, so that the forward transmission queue is adjusted, and each forward data in the adjusted forward transmission queue is transmitted to the third satellite/fourth satellite.
Compared with the scheme of data transmission between two satellites according to the first-in first-out principle in the prior art, the embodiment of the application can enable the first satellite to send out a plurality of forward data in the same transmitting direction after the second forward data in the same priority are put into the first forward data, so that the number of times of adjusting the transmitting direction of the first satellite is reduced, the problems of loss and low data transmission efficiency of the transmitting satellite are reduced, and the service life of the satellite is indirectly prolonged.
Fig. 5 shows a schematic structural diagram of an electronic device provided in an embodiment of the present application, including: a processor 501, a storage medium 502 and a bus 503, wherein the storage medium 502 stores machine-readable instructions executable by the processor 501, when the electronic device runs the data transmission method as in the embodiment, the processor 501 and the storage medium 502 communicate through the bus 503, and the processor 501 executes the machine-readable instructions to perform the steps as in the embodiment.
In an embodiment, the storage medium 502 may further execute other machine-readable instructions to perform other methods as described in the embodiments, and for details of the method steps and principles of the specific execution, reference is made to the description of the embodiments and detailed descriptions are omitted here.
Embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the steps in the embodiments.
In the embodiments of the present application, when being executed by a processor, the computer program may further execute other machine-readable instructions to perform other methods as described in the embodiments, and for the method steps and principles of specific execution, reference is made to the description of the embodiments, and details are not repeated here.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is merely a logical division, and there may be other divisions in actual implementation, and for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or modules through some communication interfaces, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall cover the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. A data transmission method, applied to an earth station, comprising:
after receiving return data sent by at least one first satellite, performing data processing on the return data, and putting the processed return data into a forward sending queue as forward data based on the priority of each return data; the return data is received by the first satellite from a second satellite;
for each first forward data in the forward transmission queue, adjusting a transmission direction of a third satellite receiving the first forward data based on an orbit of the first satellite; a position of the first forward data in the forward transmit queue is determined based on a length of the forward transmit queue;
for each second forward data in the forward transmission queue, which is at the same priority as the first forward data, if the direction of a fourth satellite receiving the second forward data is located within the beam range of the first satellite in the transmission direction, adjusting the second forward data to be behind the first forward data, and uploading the forward data to the first satellite based on the adjusted forward transmission queue, so that the first satellite transmits the first forward data/the second forward data to the third satellite/the fourth satellite;
before uploading the forward data to the first satellite based on the adjusted forward transmit queue, the method further comprises:
for each of the forward data, determining an orbit of a target satellite receiving the forward data;
determining a beam interval related to the first satellite based on a rotation interval of the transmitting direction of the first satellite and a beam range corresponding to each transmitting direction;
if the position of the target satellite at the target moment is not in the beam interval, the sending task of the forward data is broadcasted publicly, and the forward data is sent to a switching earth station responding to the sending task; the target time is an expected transmission time of the first satellite to transmit the forward data.
2. The method of claim 1, wherein performing data processing on the return data comprises:
analyzing the return data by adopting a data format corresponding to the communication protocol based on the communication protocol type carried in the return data to obtain a seven-element group of the return data;
judging whether the return data meet preset communication requirements or not based on a communication protocol, data length, data type, identification of a second satellite, identification of a target satellite, a time code and a safety code in the seven-tuple; the target satellite is the third satellite or the fourth satellite;
and if the return data meet the communication requirement, storing the processed return data serving as the forward data into the forward sending queue.
3. The method of claim 2, wherein the communication requirement comprises:
the communication protocol is in a predefined communication protocol list, the identifier of the second satellite is in a predefined service list, the orbital element of the target satellite is stored in a database, and the password calculation result is consistent with the security code in the seven-element group; the cryptographic calculation result is calculated by the earth station based on six elements of the seven-tuple except the security code and a calculation method allocated to the second satellite in advance.
4. The method of claim 1, wherein transmitting the forward data to a transit earth station responsive to the transmission mission comprises:
transmitting the forward data to the transit earth station over a communication channel if the communication channel exists with the transit earth station;
and if no communication channel exists between the first satellite and the transit earth station, sending the forward data to the first satellite so that the first satellite sends the forward data to a transit satellite corresponding to the transit earth station and downloads the forward data to the transit earth station through the transit satellite.
5. The method of claim 1, wherein prior to uploading the forward data to the first satellite based on the adjusted forward transmit queue, the method further comprises:
determining an identification of a target satellite; the target satellite is the third satellite or the fourth satellite;
and if an upper injection rule is set when the target satellite registers to access the network, modifying the forward data according to the upper injection rule.
6. The method of claim 1, wherein the position of the first forward data in the forward transmit queue is determined based on a length of the forward transmit queue, comprising:
determining a first value representing the number of forward data items in the forward transmit queue at a current time;
if the first numerical value is larger than a preset threshold value, quadratic dividing the first numerical value to obtain a second numerical value; the preset threshold value is 4;
taking the integer part of the second numerical value as a reference value, and calculating a double value of the reference value;
taking the sum of the double-valued sequence number and the first sequence number as a target sequence number, and determining forward data sequenced into the target sequence number in the forward sending queue as the first forward data; the first sequence number is a sequence number value of the first forward data in the forward sending queue.
7. A data transmission apparatus, said apparatus residing at an earth station, comprising:
the receiving unit is used for processing the return data after receiving the return data sent by at least one first satellite, and putting the processed return data into a forward sending queue as forward data based on the priority of each return data; the return data is received by the first satellite from a second satellite;
a direction adjusting unit, configured to adjust, for each first forward data in the forward transmission queue, a transmission direction of a first satellite based on an orbit of a third satellite receiving the first forward data; a position of the first forward data in the forward transmit queue is determined based on a length of the forward transmit queue;
a queue adjusting unit, configured to, for each second forward data in the forward transmission queue that is at the same priority as the first forward data, adjust the second forward data to be subsequent to the first forward data if a direction of a fourth satellite receiving the second forward data is located within a beam range of the first satellite in the transmission direction, and upload the forward data to the first satellite based on the adjusted forward transmission queue, so that the first satellite transmits the first forward data/the second forward data to the third satellite/the fourth satellite;
the device further comprises:
a first determining unit, configured to determine, for each of the forward data, an orbit of a target satellite receiving the forward data before uploading the forward data to the first satellite based on the adjusted forward transmission queue;
a second determining unit, configured to determine a beam interval related to the first satellite based on a rotation interval of transmission directions of the first satellite and a beam range corresponding to each of the transmission directions;
a broadcasting unit configured to broadcast a transmission task of the forward data in a public manner and transmit the forward data to a transit earth station that responds to the transmission task if the azimuth of the target satellite at the target time is not within the beam interval; the target time is an expected transmission time of the first satellite to transmit the forward data.
8. An electronic device, comprising: a processor, a storage medium and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor and the storage medium communicating with each other via the bus when the electronic device is running, the processor executing the machine-readable instructions to perform the steps of the data transmission method according to any one of claims 1 to 6.
9. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the data transmission method according to one of claims 1 to 6.
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