CN116599853A - Satellite network simulation method and platform based on Docker - Google Patents
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
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- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
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Abstract
The invention provides a satellite network simulation method and platform based on a Docker, and relates to the technical field of satellite networks. The platform comprises four parts, namely a simulation scene management and control module, a virtual node management and control module, a network link management and control module and a scene and core index display module, which are respectively responsible for simulation scene management and control, virtual node management and control, network link management and control, scene and simulation data display, wherein an experimenter sets a satellite communication networking scene configuration file, and the file contains a plurality of information such as communication scenes, communication node configuration, link topology relationship, communication service deployment and the like. The invention has high efficiency and expansibility, can cope with large-scale satellite network simulation, and can truly reflect the high dynamic property and long delay property of the satellite network. According to the invention, the container technology is fully utilized to realize rapid deployment of nodes and links, the SDN technology is also utilized to realize on-off control of satellite links, the authenticity of a simulation test is increased, and the scene display and test results can be more visual and understandable.
Description
Technical Field
The invention relates to the technical field of satellite networks, in particular to a satellite network simulation method and platform based on a Docker.
Background
Currently, satellite networks have become an important point of development and an essential component of future 6G networks. Because the field of low orbit satellite network is still in a starting stage, various communication and networking tests cannot be carried out in actual test or the test cost is too high, a network simulation scheme is needed in the prior art, and problems in satellite network research and development are found. In addition, the container technology based on the Docker is mature at present, and the characteristics of light weight, flexible deployment, strong network simulation function and the like of the container technology are also greatly in line with the characteristics of a satellite network, so that the container technology based on the Docker can perform rapid and accurate satellite network simulation and has better expandability. However, there is no satellite network simulation technology based on Docker in the prior art.
Disclosure of Invention
In view of this, the invention provides a satellite network simulation method and platform based on Docker, which can perform network simulation and test for different satellite network types, satellite node types, networking protocol systems, communication scenes and the like, and realize evaluation for novel network architecture, network protocols, routing algorithms, resource scheduling algorithms and the like.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a satellite network simulation method based on a Docker comprises the following steps:
the method comprises the steps of constructing a satellite network simulation platform, dividing the satellite network simulation platform into four parts, namely a simulation scene management and control module, a virtual node management and control module, a network link management and control module and a scene and core index display module, which are respectively responsible for configuration of an experimental scene, virtualization and management and control of satellite nodes, network topology management and control and display of the scene and core index;
the method comprises the steps of reading in a scene configuration file through a simulation scene management and control module, obtaining scene basic configuration, node configuration, link configuration and service configuration information, utilizing a virtual node management and control module to establish a virtual node corresponding to a communication node in a satellite network according to the node configuration and the service configuration information, utilizing a network link management and control module to conduct on-off control of a link according to the scene basic configuration and the link configuration information, and displaying in a scene and core index display module according to a numerical value result returned by the network link management and control module.
Further, the simulation scene management and control module is used for realizing the following functions:
scene play speed management: the method comprises the steps of responsible for managing scene playing speed, setting simulation time lapse speed to be a multiple of normal time lapse speed, and sending multiple parameters to a network link management and control module and a scene and core index display module according to the multiple setting of the playing speed, wherein the multiple parameters are used for adjusting link delay and data delay;
network topology parameter configuration: the method comprises the steps of responsible for setting the composition and topological relation of a satellite network, and setting satellite orbit parameters, ground communication node position parameters and air vehicle position and speed parameters;
communication networking parameter configuration: setting communication parameters and a networking system, setting communication frequency, power, antenna type, gain, coding system parameters, network protocol system parameters of a link layer and a network layer, and sending the parameters to a network link management and control module;
event handling service: is responsible for processing various error events and random events.
Further, the virtual node management and control module is used for realizing the following functions:
virtual node image management service: according to the satellite node type, the capability of loading different communication networking characteristics by utilizing different basic images is packed into a Docker image, and the Docker image is stored into a local private image library and managed by a virtual node management and control module;
virtual node creation: when the simulation scene management and control module issues a virtual node creation instruction to the virtual node management and control module, the virtual node management and control module finds a specified image type from a local private image library according to the node type, loads the specified image type, gives network information of the specified image type to the network link management and control module for construction, and reports error information to the simulation scene management and control module to prepare a newly built image or correct the node type if the specified type is not found in the local private image library;
virtual node deletion: when the simulation scene management and control module gives a virtual node deleting instruction to the virtual node management and control module, the virtual node management and control module finds out a designated virtual node from a local virtual node information list according to the node identification information and deletes the designated virtual node; and if the appointed virtual node is not found in the local virtual node list, sending report error information to the simulation scene management and control module.
Further, the network link management and control module is used for realizing the following functions:
calculating link performance parameters: calculating the simulation propagation delay according to the inter-satellite distance and the scene playing speed, and calculating the error rate according to the communication frequency, the power, the transceiver antenna parameters, the transmission distance and the code system;
network link connection: the method is responsible for establishing a connection relationship between satellites, and establishing a communication link for a co-orbit adjacent satellite and a non-orbit adjacent satellite;
and (3) link on-off control: the method is in charge of on-off control of links between satellites, and according to a satellite operation rule, when the conditions of the establishment of the links between satellites are not established, the connection is disconnected, when the conditions of the establishment of the links between satellites are established, the connection is reestablished, and a link on-off instruction is issued to an SDN router;
setting link performance parameters: and the method is responsible for setting the link performance parameters among satellites, and setting the designated link by using the calculation results of the link performance parameters, including bandwidth, delay and bit error rate parameters.
Further, in the network link management and control module, the specific mode of network link connection is as follows:
obtaining a virtual node pair which needs to be connected, and obtaining IP address and virtual port address information of the virtual node pair;
establishing a connection relation of the corresponding virtual node pair by using the iptables and the static routing table;
the specific mode of calculating the link performance parameter is as follows:
calculating the link delay, and calculating the ratio of the link communication distance to the speed of light to obtain the link single-pass link transmission delay;
the simulation bandwidth correction, setting the link bandwidth as the simulation bandwidth for the situation that the scene design bandwidth exceeds the simulation bandwidth, and obtaining the bandwidth correction parameter = scene design bandwidth/simulation bandwidth;
simulation delay correction, setting the simulation delay as follows according to the scene playing speed: link single-pass link transmission delay/(scene play speed) bandwidth correction parameter);
generating a simulation delay sequence, wherein the simulation delay sequence is set to be a simulation delay sequence at intervals of 10ms according to simulation precision for network delay caused by continuous change of inter-satellite distances;
the specific mode of link performance parameter setting is as follows:
and generating a link port delay command sequence by using a pumba tool by using the link simulation delay sequence and the corresponding duration thereof, and continuously acting on the corresponding link.
Further, the scene and core index display module is used for realizing the following functions:
core scene display: the network node is responsible for the display function of communication scenes and covers satellites and ground stations;
core index display: and correcting the network simulation performance according to the information arrival time, and displaying the corrected network delay and packet loss data.
Further, in the scene and core index display module, the correction formula of the network delay is as follows:
simulation network delay scene play speed bandwidth correction parameters.
A satellite network simulation method based on a Docker comprises the following steps:
the method comprises the steps of constructing a satellite network simulation platform, dividing the satellite network simulation platform into four parts, namely a simulation scene management and control module, a virtual node management and control module, a network link management and control module and a scene and core index display module, which are respectively responsible for configuration of an experimental scene, virtualization and management and control of satellite nodes, network topology management and control and display of the scene and core index;
the satellite network simulation platform reads in a scene configuration file through a simulation scene management and control module;
the simulation scene management and control module transmits scene configuration information in the scene configuration file to the scene and core index display module;
the simulation scene management and control module transmits network node configuration information and service information in the scene configuration file to the virtual node management and control module, the virtual node management and control module gives a virtual node creation instruction to the general computing platform according to the two types of information, the general computing platform selects a mirror image in a mirror image library to create a mirror image node, and once creation is successful, success information is returned to the simulation scene management and control module;
the simulation scene control module transmits communication configuration information in the scene configuration file to the network link management and control module, wherein the communication configuration information comprises communication frequency, receiving and transmitting antenna types, receiving and transmitting antenna gains and encoding and decoding mode parameters, the scene and core index display module transmits inter-satellite distance information to the network link management and control module, and the network link management and control module calculates link performance parameters by utilizing the received information to acquire link delay and packet loss rate parameter values;
the simulation scene control module transmits playing speed information of the scene to the network link management and control module, the network link management and control module calculates a simulation delay value and a packet loss rate parameter value according to the calculated link delay and packet loss rate parameter value and by combining the playing speed information, and the simulation delay value and the packet loss rate parameter value are set by utilizing a puba tool, and once the setting is successful, success information is returned to the simulation scene management and control module;
the simulation scene control module issues a service start transmission instruction to the virtual node management and control module, the virtual node starts data transmission, routing and receiving work, each network node timely returns core data information to the scene and core index display module, and the core data information comprises delay, packet loss and queue length information;
the simulation scene control module transmits the play speed parameter to the scene and core index display module, and the scene and core index display module calculates by combining the core data information collected from each node of the network by using the play speed parameter to obtain and display the core index.
Further, the satellite network simulation platform also provides a play speed adjusting function, and when a user sends out a play speed adjusting event, the following flow is executed:
the simulation scene management and control module receives the play speed adjustment event to cause interruption, and issues a transmission suspension instruction to the virtual node management and control module;
the simulation scene management and control module transmits new play speed parameters to the network link control module, calculates simulation delay values and packet loss rate parameter values by utilizing the previously calculated link performance parameters and combining with the current latest play speed parameters, and then utilizes a puba tool to set link parameters, and returns success information to the simulation scene management and control module once the setting is successful;
the simulation scene control module transmits a service restarting transmission instruction to the virtual node management and control module, the virtual node starts data transmission, routing and receiving work, and each network node timely returns core data information to the scene and core index display module, wherein the core data information comprises delay, packet loss and queue length information;
the simulation scene control module transmits new play speed parameters to the scene and core index display module, and the scene and core index display module calculates by utilizing the play speed parameters and combining core data information collected from each node of the network to obtain and display the core index.
A satellite network simulation platform based on a dock comprises four parts, namely a simulation scene management and control module, a virtual node management and control module, a network link management and control module and a scene and core index display module, which are respectively responsible for the configuration of an experimental scene, the virtualization and management and control of a satellite node, the management and control of a network topology and the display of a scene and a core index;
the simulation scene management and control module reads in the scene configuration file, acquires scene basic configuration, node configuration, link configuration and service configuration information, establishes a virtual node corresponding to a communication node in the satellite network by using the virtual node management and control module according to the node configuration and service configuration information, performs on-off control of a link by using the network link management and control module according to the scene basic configuration and the link configuration information, and displays the scene and core index display module according to a numerical value result returned by the network link management and control module.
The invention has the beneficial effects that:
1. the method adopts the Docker to construct the virtual nodes and the virtual network, thereby improving the flexibility, convenience and accuracy of satellite network simulation.
2. The invention can simulate and test the network aiming at different satellite network types, satellite node types, networking protocol systems, communication scenes and the like, thereby evaluating novel network architecture, network protocols, routing algorithms, resource scheduling algorithms and the like and greatly facilitating the research and development of satellite network technology.
Drawings
FIG. 1 is a block diagram of a simulation platform system of the present invention.
FIG. 2 is a flow of virtual node image non-existence event processing.
FIG. 3 is a simulation flow of the simulation platform.
Fig. 4 is a play speed adjustment event flow.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a dock-based satellite network simulation platform includes four parts, namely a simulation scene management and control module, a virtual node management and control module, a network link management and control module, and a scene and core index display module, which are respectively responsible for configuration of an experimental scene, virtualization and management and control of satellite nodes, network topology management and control, and display of a scene and a core index;
the simulation scene management and control module reads in the scene configuration file, acquires scene basic configuration, node configuration, link configuration and service configuration information, establishes a virtual node corresponding to a communication node in the satellite network by using the virtual node management and control module according to the node configuration and service configuration information, performs on-off control of a link by using the network link management and control module according to the scene basic configuration and the link configuration information, and displays the scene and core index display module according to a numerical value result returned by the network link management and control module. The satellite network simulation platform based on the dock is characterized by comprising a simulation scene management and control module, a virtual node management and control module, a network link management and control module and a scene and core index display module, wherein the four parts are respectively responsible for the configuration of an experimental scene, the virtualization and management and control of satellite nodes, the management and control of network topology and the display of the scene and core index;
the simulation scene management and control module reads in the scene configuration file, acquires scene basic configuration, node configuration, link configuration and service configuration information, establishes a virtual node corresponding to a communication node in the satellite network by using the virtual node management and control module according to the node configuration and service configuration information, performs on-off control of a link by using the network link management and control module according to the scene basic configuration and the link configuration information, and displays the scene and core index display module according to a numerical value result returned by the network link management and control module.
A satellite network simulation method based on a Docker divides a platform into four parts according to function distinction and is respectively responsible for simulation scene management and control, virtual node management and control, network link management and control and scene and simulation data display. The experimenter sets a satellite communication networking scene configuration file, wherein the file contains a plurality of pieces of information such as communication scenes, communication node configuration, link topology relationship, communication service deployment and the like. The simulation scene management and control module can read in a scene configuration file and send internal information to a corresponding module, has the functions of starting, accelerating, decelerating, suspending and the like of a simulation process, and performs virtual node creation and mapping by utilizing a Docker technology according to node configuration and communication service deployment information in the file. And the network link management and control module utilizes the Pumba and SDN technology to carry out network link delay and delay change, packet loss rate, on-off and other configurations according to the link information in the scene file. Finally, the scene and core index display module collects information and performs visual display on the scene.
The simulation scene management and control module mainly comprises the following functions:
scene play speed management: the simulation time lapse speed can be set to be a plurality of times of the normal time lapse speed, and multiple parameters are sent to the network link management and control module and the scene and core index display module according to the multiple setting of the play speed and used for adjusting core indexes such as link delay, data delay and the like;
network topology parameter configuration: the method is responsible for setting the composition and topological relation of a satellite network, and setting satellite orbit parameters, ground communication node position parameters, airborne aircraft position speed parameters and the like;
communication networking parameter configuration: setting communication parameters and a networking system, setting communication parameters such as communication frequency, power, antenna type, gain, coding system and network protocol system parameters such as a link layer and a network layer, sending the parameters to a network link management and control module, and setting parameters such as link delay, packet loss and the like;
event handling service: and the processing of various error events and random events, such as scene configuration file error reporting, virtual node allocation error, link error reporting, network error reporting and other error events and random events such as playing speed acceleration, suspension and the like, is responsible for starting corresponding processing flows.
Once the simulation scene is established, the simulation scene management and control module needs to call the virtual node management and control module to create the node, and the main functions of the simulation scene management and control module include:
virtual node image management service: according to the satellite node types, such as different switching modes of transparent forwarding, IP switching and the like, different orbit heights of GEO, MEO, LEO and the like, different communication networking systems of ATM, IP, CCSDS and the like, different basic images are utilized to load different communication networking characteristic capacities, the different communication networking characteristic capacities are packed into a Docker image, and the Docker image is stored in a local private image library and managed by a virtual node management and control module;
virtual node creation: the simulation scene management and control module issues a virtual node creation instruction to the virtual node management and control module, the virtual node management and control module finds a specified image type from a local private image library according to the node type, loads the specified image type, gives network information of the specified image type to the network link management and control module for construction, and reports error information to the simulation scene management and control module to prepare a newly built image or correct the node type if the specified type is not found in the local private image library, as shown in fig. 2;
virtual node deletion: the simulation scene management and control module issues a virtual node deleting instruction to the virtual node management and control module, the virtual node management and control module finds out the appointed virtual node from the local virtual node information list according to the node identification information and deletes the appointed virtual node, and if the appointed virtual node is not found in the local virtual node list, the virtual node management and control module reports error information to the simulation scene management and control module.
Once the simulation scene is established, the simulation scene management and control module needs to call the network link management and control module to connect the created virtual nodes, and a virtual network is built, and the main functions of the simulation scene management and control module include:
link performance parameter calculation function: calculating link performance parameters among satellites, calculating simulation propagation delay according to inter-satellite distances and scene playing speeds, calculating error rates according to communication frequencies, power, transceiver antenna parameters, transmission distances, coding systems and the like, and transmitting the error rates to a link performance setting function according to requirements;
calculating link delay, and obtaining link single-way link transmission delay according to (link communication distance/light speed);
simulation bandwidth correction, namely setting a link bandwidth as a simulation bandwidth and acquiring a bandwidth correction parameter= (scene design bandwidth/simulation bandwidth);
simulation delay correction, setting the simulation delay as (link single-pass link transmission delay/(scene play speed: bandwidth correction parameter)) according to the scene play speed;
the simulation delay sequence is generated, and the simulation delay sequence is set to be at intervals of 10ms according to the simulation precision for network delay such as continuous change of inter-satellite distances.
Network link connection function: the method is responsible for establishing a connection relationship between satellites, and establishing a communication link for a co-orbit adjacent satellite and a non-orbit adjacent satellite;
and acquiring the virtual node pair which needs to be connected, and acquiring information such as an IP address, a virtual port address and the like of the virtual node pair.
And establishing a connection relation of the corresponding virtual node pair by using an iptables technology and a static routing table technology.
Link on-off control function: and the method is responsible for controlling the on-off of the inter-satellite links, and according to the operation rule of the satellites, when the conditions for establishing the inter-satellite links are not established, the connection needs to be disconnected, and when the conditions for establishing the inter-satellite links are established, the connection needs to be reestablished, and a link on-off instruction is issued to the SDN router.
Link performance parameter setting function: and the method is responsible for setting the link performance parameters among satellites, and the designated link is set by using the calculation results of the link performance parameters, including bandwidth, delay and bit error rate parameters.
The link simulation delay sequence and the corresponding duration time are utilized, and the puba technology is utilized to generate a link port delay command sequence which acts on the corresponding port, so that the link generates the effect of dynamic delay change.
Once the simulation is started, the simulation result needs to be displayed through a scene and core index display module, and the functions of the simulation result comprise:
core scene display: is responsible for the display function of communication scenes, covers network nodes such as satellites, ground stations and the like,
core index display: and correcting network simulation performances such as network delay, packet loss and the like according to the information arrival time, and displaying corrected data.
And correcting the network delay display, namely correcting the network delay obtained by simulation, and obtaining the network delay display data by adopting (simulating the network delay, the scene playing speed and the bandwidth correction parameter).
As shown in FIG. 3, once the design of each module is completed, the simulation platform uses the following simulation flow to process:
the simulation platform reads in a scene configuration file through a simulation scene management and control module;
the simulation scene management and control module transmits scene configuration information in the scene configuration file to the scene and core index display module, so that the scene and core index display module can conveniently read the scene file for scene display;
the simulation scene management and control module transmits network node configuration information and service information in a scene configuration file to the virtual node management and control module, the virtual node management and control module gives a virtual node creation instruction to the general computing platform according to the two types of information, the general computing platform selects a proper mirror image in a mirror image library to create a mirror node, and once creation is successful, success information is returned to the simulation scene management and control module;
the simulation scene control module transmits communication configuration information in the scene configuration file to the network link management and control module, wherein the information mainly comprises communication parameters such as communication frequency, receiving and transmitting antenna type, receiving and transmitting antenna gain, coding and decoding modes and the like, the scene and core index display module transmits inter-satellite distance information to the network link management and control module, and the network link management and control module calculates link performance parameters by utilizing the received information to acquire link delay and packet loss rate parameter values;
the simulation scene control module transmits playing speed information of the scene to the network link control module, the network link control module calculates a simulation delay value and a packet loss rate parameter value according to the calculated link delay and packet loss rate parameter value and combines the playing speed information, and the simulation delay value and the packet loss rate parameter value are set by utilizing the Pumba technology, once the setting is successful, success information is returned to the simulation scene control module;
the simulation scene control module issues a service start transmission instruction to the virtual node management and control module, the virtual node starts data transmission, routing and receiving work, each network node timely returns core data information to the scene and core index display module, and the core data information comprises information such as delay, packet loss, queue length and the like;
the simulation scene control module transmits the play speed parameters to the scene and core index display module, and the scene and core index display module calculates by combining the play speed parameters with the core data information collected from each node of the network to obtain and display the core index.
As shown in fig. 4, after the simulation activity is started, the experimenter can adjust the test speed according to the requirement, and the adjustment flow is as follows:
the simulation scene management and control module receives the play speed adjustment event to cause interruption, and issues a transmission suspension instruction to the virtual node management and control module;
the simulation scene management and control module transmits new play speed parameters to the network link control module, calculates a simulation delay value and a packet loss rate parameter value by combining the previously calculated link performance parameters with the current latest play speed parameters, and performs link parameter setting by using a Pumba technology, and returns success information to the simulation scene management and control module once the setting is successful;
the simulation scene control module transmits a service restarting transmission instruction to the virtual node management and control module, the virtual node starts data transmission, routing and receiving work, and each network node timely returns core data information to the scene and core index display module, wherein the core data information comprises information such as delay, packet loss, queue length and the like;
the simulation scene control module transmits new play speed parameters to the scene and core index display module, and the scene and core index display module calculates by combining the play speed parameters with core data information collected from each node of the network to obtain and display the core index.
The invention has high efficiency and expansibility, can cope with large-scale satellite network simulation, and can truly reflect the high dynamic property and long delay property of the satellite network. According to the invention, the container technology is fully utilized to realize rapid deployment of nodes and links, the SDN technology is also utilized to realize on-off control of satellite links, and the authenticity of a simulation test is increased. And in addition, the data collection is performed, and meanwhile, the visual technology is combined, so that scene display and test results are more visual and understandable.
Claims (10)
1. The satellite network simulation method based on the Docker is characterized by comprising the following steps of:
the method comprises the steps of constructing a satellite network simulation platform, dividing the satellite network simulation platform into four parts, namely a simulation scene management and control module, a virtual node management and control module, a network link management and control module and a scene and core index display module, which are respectively responsible for configuration of an experimental scene, virtualization and management and control of satellite nodes, network topology management and control and display of the scene and core index;
the method comprises the steps of reading in a scene configuration file through a simulation scene management and control module, obtaining scene basic configuration, node configuration, link configuration and service configuration information, utilizing a virtual node management and control module to establish a virtual node corresponding to a communication node in a satellite network according to the node configuration and the service configuration information, utilizing a network link management and control module to conduct on-off control of a link according to the scene basic configuration and the link configuration information, and displaying in a scene and core index display module according to a numerical value result returned by the network link management and control module.
2. The satellite network simulation method based on Docker according to claim 1, wherein the simulation scene management and control module is configured to implement the following functions:
scene play speed management: the method comprises the steps of responsible for managing scene playing speed, setting simulation time lapse speed to be a multiple of normal time lapse speed, and sending multiple parameters to a network link management and control module and a scene and core index display module according to the multiple setting of the playing speed, wherein the multiple parameters are used for adjusting link delay and data delay;
network topology parameter configuration: the method comprises the steps of responsible for setting the composition and topological relation of a satellite network, and setting satellite orbit parameters, ground communication node position parameters and air vehicle position and speed parameters;
communication networking parameter configuration: setting communication parameters and a networking system, setting communication frequency, power, antenna type, gain, coding system parameters, network protocol system parameters of a link layer and a network layer, and sending the parameters to a network link management and control module;
event handling service: is responsible for processing various error events and random events.
3. The satellite network simulation method based on Docker according to claim 1, wherein the virtual node management and control module is configured to implement the following functions:
virtual node image management service: according to the satellite node type, the capability of loading different communication networking characteristics by utilizing different basic images is packed into a Docker image, and the Docker image is stored into a local private image library and managed by a virtual node management and control module;
virtual node creation: when the simulation scene management and control module issues a virtual node creation instruction to the virtual node management and control module, the virtual node management and control module finds a specified image type from a local private image library according to the node type, loads the specified image type, gives network information of the specified image type to the network link management and control module for construction, and reports error information to the simulation scene management and control module to prepare a newly built image or correct the node type if the specified type is not found in the local private image library;
virtual node deletion: when the simulation scene management and control module gives a virtual node deleting instruction to the virtual node management and control module, the virtual node management and control module finds out a designated virtual node from a local virtual node information list according to the node identification information and deletes the designated virtual node; and if the appointed virtual node is not found in the local virtual node list, sending report error information to the simulation scene management and control module.
4. The satellite network simulation method based on Docker according to claim 1, wherein the network link management module is configured to implement the following functions:
calculating link performance parameters: calculating the simulation propagation delay according to the inter-satellite distance and the scene playing speed, and calculating the error rate according to the communication frequency, the power, the transceiver antenna parameters, the transmission distance and the code system;
network link connection: the method is responsible for establishing a connection relationship between satellites, and establishing a communication link for a co-orbit adjacent satellite and a non-orbit adjacent satellite;
and (3) link on-off control: the method is in charge of on-off control of links between satellites, and according to a satellite operation rule, when the conditions of the establishment of the links between satellites are not established, the connection is disconnected, when the conditions of the establishment of the links between satellites are established, the connection is reestablished, and a link on-off instruction is issued to an SDN router;
setting link performance parameters: and the method is responsible for setting the link performance parameters among satellites, and setting the designated link by using the calculation results of the link performance parameters, including bandwidth, delay and bit error rate parameters.
5. The satellite network simulation method based on Docker according to claim 4, wherein the specific mode of network link connection in the network link management and control module is as follows:
obtaining a virtual node pair which needs to be connected, and obtaining IP address and virtual port address information of the virtual node pair;
establishing a connection relation of the corresponding virtual node pair by using the iptables and the static routing table;
the specific mode of calculating the link performance parameter is as follows:
calculating the link delay, and calculating the ratio of the link communication distance to the speed of light to obtain the link single-pass link transmission delay;
the simulation bandwidth correction, setting the link bandwidth as the simulation bandwidth for the situation that the scene design bandwidth exceeds the simulation bandwidth, and obtaining the bandwidth correction parameter = scene design bandwidth/simulation bandwidth;
simulation delay correction, setting the simulation delay as follows according to the scene playing speed: link single-pass link transmission delay/(scene play speed) bandwidth correction parameter);
generating a simulation delay sequence, wherein the simulation delay sequence is set to be a simulation delay sequence at intervals of 10ms according to simulation precision for network delay caused by continuous change of inter-satellite distances;
the specific mode of link performance parameter setting is as follows:
and generating a link port delay command sequence by using a pumba tool by using the link simulation delay sequence and the corresponding duration thereof, and continuously acting on the corresponding link.
6. The satellite network simulation method based on Docker according to claim 1, wherein the scene and core index display module is configured to implement the following functions:
core scene display: the network node is responsible for the display function of communication scenes and covers satellites and ground stations;
core index display: and correcting the network simulation performance according to the information arrival time, and displaying the corrected network delay and packet loss data.
7. The method for simulating a satellite network based on Docker according to claim 6, wherein in the scene and core index display module, a correction formula of network delay is:
simulation network delay scene play speed bandwidth correction parameters.
8. The satellite network simulation method based on the Docker is characterized by comprising the following steps of:
the method comprises the steps of constructing a satellite network simulation platform, dividing the satellite network simulation platform into four parts, namely a simulation scene management and control module, a virtual node management and control module, a network link management and control module and a scene and core index display module, which are respectively responsible for configuration of an experimental scene, virtualization and management and control of satellite nodes, network topology management and control and display of the scene and core index;
the satellite network simulation platform reads in a scene configuration file through a simulation scene management and control module;
the simulation scene management and control module transmits scene configuration information in the scene configuration file to the scene and core index display module;
the simulation scene management and control module transmits network node configuration information and service information in the scene configuration file to the virtual node management and control module, the virtual node management and control module gives a virtual node creation instruction to the general computing platform according to the two types of information, the general computing platform selects a mirror image in a mirror image library to create a mirror image node, and once creation is successful, success information is returned to the simulation scene management and control module;
the simulation scene control module transmits communication configuration information in the scene configuration file to the network link management and control module, wherein the communication configuration information comprises communication frequency, receiving and transmitting antenna types, receiving and transmitting antenna gains and encoding and decoding mode parameters, the scene and core index display module transmits inter-satellite distance information to the network link management and control module, and the network link management and control module calculates link performance parameters by utilizing the received information to acquire link delay and packet loss rate parameter values;
the simulation scene control module transmits playing speed information of the scene to the network link management and control module, the network link management and control module calculates a simulation delay value and a packet loss rate parameter value according to the calculated link delay and packet loss rate parameter value and by combining the playing speed information, and the simulation delay value and the packet loss rate parameter value are set by utilizing a puba tool, and once the setting is successful, success information is returned to the simulation scene management and control module;
the simulation scene control module issues a service start transmission instruction to the virtual node management and control module, the virtual node starts data transmission, routing and receiving work, each network node timely returns core data information to the scene and core index display module, and the core data information comprises delay, packet loss and queue length information;
the simulation scene control module transmits the play speed parameter to the scene and core index display module, and the scene and core index display module calculates by combining the core data information collected from each node of the network by using the play speed parameter to obtain and display the core index.
9. The method for simulating a satellite network according to claim 8, wherein the satellite network simulation platform further provides a play speed adjustment function, and when a user issues a play speed adjustment event, the following procedure is performed:
the simulation scene management and control module receives the play speed adjustment event to cause interruption, and issues a transmission suspension instruction to the virtual node management and control module;
the simulation scene management and control module transmits new play speed parameters to the network link control module, calculates simulation delay values and packet loss rate parameter values by utilizing the previously calculated link performance parameters and combining with the current latest play speed parameters, and then utilizes a puba tool to set link parameters, and returns success information to the simulation scene management and control module once the setting is successful;
the simulation scene control module transmits a service restarting transmission instruction to the virtual node management and control module, the virtual node starts data transmission, routing and receiving work, and each network node timely returns core data information to the scene and core index display module, wherein the core data information comprises delay, packet loss and queue length information;
the simulation scene control module transmits new play speed parameters to the scene and core index display module, and the scene and core index display module calculates by utilizing the play speed parameters and combining core data information collected from each node of the network to obtain and display the core index.
10. The satellite network simulation platform based on the dock is characterized by comprising a simulation scene management and control module, a virtual node management and control module, a network link management and control module and a scene and core index display module, wherein the four parts are respectively responsible for the configuration of an experimental scene, the virtualization and management and control of satellite nodes, the management and control of network topology and the display of the scene and core index;
the simulation scene management and control module reads in the scene configuration file, acquires scene basic configuration, node configuration, link configuration and service configuration information, establishes a virtual node corresponding to a communication node in the satellite network by using the virtual node management and control module according to the node configuration and service configuration information, performs on-off control of a link by using the network link management and control module according to the scene basic configuration and the link configuration information, and displays the scene and core index display module according to a numerical value result returned by the network link management and control module.
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| CN117195599B (en) * | 2023-11-07 | 2024-03-01 | 中国人民解放军军事科学院国防科技创新研究院 | Cloud-edge cooperative satellite service migration verification method and device |
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