171 results about "Network emulation" patented technology

The invention provides a multi-level service priority dynamic scheduling simulation method and device, a medium and a product. The method comprises the following steps: constructing a priority label system; establishing a dynamic binding relationship between the service flow and the priority label; when a service layer generates a data packet, embedding a priority label for the data packet based on the dynamic binding relationship; extracting a priority label carried by the data packet on a protocol stack MAC layer, and ensuring that the priority label is unvarnished to a lower layer protocol in a lossless manner; and based on the priority labels carried by the extracted data packets, classifying the data packets into logic queues with corresponding priorities, and executing a differentiated scheduling strategy. The method can adapt to diversified requirements of data services of different types and priorities for network resources, effectively improves the simulation model accuracy, improves the simulation experiment efficiency and simulation real-time performance and reliability in a multi-service priority 5G communication network simulation scene, more accurately reflects the performance of a real network, and improves the simulation experience of the 5G communication network. And meanwhile, the simulation platform has higher expansibility and flexibility.

The invention provides a visual underwater sensor network simulation method, and relates to the technical field of underwater sensor networks, and the method comprises the steps: configuring network simulation parameters which comprise topological structure parameters, channel parameters and simulation parameters; inputting the channel parameters into an underwater acoustic calculation tool to generate an underwater acoustic multipath channel for simulation; the bit error rate BER of the multi-carrier MFSK underwater acoustic communication algorithm under the underwater acoustic multipath channel condition is calculated, and the bit error rate BER is input into the OTcl script; performing network simulation on the configured OTcl script by using an underwater network simulator; and displaying a network simulation result through a visual interface. The underwater sensor network simulation result can be displayed through the visual interface, the defect that current NS2-based underwater sensor network simulation software does not have a visual interface is overcome, a good man-machine interaction interface can be provided for a user, the development efficiency is improved, and the user is helped to better evaluate the performance of the underwater sensor network.

The embodiment of the invention provides a network simulation evaluation method and device, a storage medium and computer equipment, and the method comprises the steps: obtaining a simulation model obtained for network system simulation, and the simulation model comprises different simulation levels; determining to select a simulation index from each simulation hierarchy; determining a simulation evaluation value of each simulation index according to the index attribute characteristic of each simulation index; and performing index aggregation on the simulation evaluation value of each simulation index to obtain a total simulation evaluation value. Compared with the prior art that simulation evaluation is carried out from the similarity of the whole system level, and the evaluation accuracy is poor, different hierarchies can be simulated during simulation, different simulation indexes are set for different hierarchies, the simulation evaluation values of different simulation indexes are comprehensively evaluated, the final total simulation evaluation value is obtained, and the evaluation accuracy is improved. And evaluation accuracy is improved.

The present disclosure belongs to the field of satellite network simulation, and in particular, relates to a link dynamic control method for a large-scale satellite network simulation platform. It is characterized in that the method includes: the eBPF program uses the device index as a key to search for the simulation start time of the current device from the eBPF Map; determines whether the simulation has started, and if not, re-searches the simulation start time of the current device; if the simulation has started, calculates the timestamp based on the system time and the simulation start time, and uses the timestamp and the device index as keys to search for the link status information of the current device at the current moment from the eBPF Map; the eBPF program executes the link control logic based on the eBPF according to the link status information. The present invention reduces the system resource overhead during formal simulation, can support large-scale dynamic link status control with finer time granularity, and will not affect the simulation logic of satellite nodes during formal simulation.

The invention provides a network simulation method, device and system based on digital twinning, and belongs to the technical field of network simulation, and the method comprises the steps: receiving real-time operation data of a physical layer device group in an actual network environment; performing preliminary analysis on the real-time operation data; uploading the real-time operation data and the preliminary analysis result to a network cloud decision platform under the condition of determining that the physical layer equipment group has a fault risk according to the preliminary analysis result; receiving a fault solution issued by the network cloud decision platform; performing simulation test on the fault solution by using a digital twin topology module; and a test result is uploaded to the network cloud decision-making platform, so that the network cloud decision-making platform determines the feasibility of the fault solution. According to the invention, all edge computing nodes are utilized to carry out simulation testing on the fault solution, full-architecture simulation based on the actual network environment is realized, and the deviation between the simulation result and the actual operation condition is reduced.

The invention relates to the technical field of satellites, and discloses a virtualization and distribution-based satellite network simulation method and system, which are applied to a satellite network simulation system, and the system comprises a main node and working nodes; the method comprises the following steps: receiving new satellite group topology information sent by the upstream through the main node; determining a corresponding target instruction through the main node based on a comparison result of the new satellite group topological information and pre-stored historical topological information; executing a corresponding simulation task through the working node based on the obtained target instruction; and updating the current state of the star group through the main node based on the obtained execution result feedback of the simulation task. According to the technical scheme provided by the invention, the construction cost of a simulation environment can be reduced, the network simulation efficiency can be improved, and further, larger-scale satellite network simulation can be borne.

The invention discloses a simulation method, device and system and a storage medium. The network simulation service consumption entity can propose the expectation for achieving different simulation performance requirements, so that the network simulation service providing entity can obtain the model parameters according to the expectation and obtain the simulation model for simulation based on the model parameters instead of considering the simulation model with better comprehensive dimension for simulation in any scene, and the simulation efficiency of the network simulation service providing entity is improved. Simulation performance requirements of network simulation service consumption entities can be balanced, and simulation efficiency can be improved.

The invention provides a node allocation method in distributed network simulation, which comprises the following steps: an initialization step: according to a network topology structure of a distributed network, obtaining resource occupation parameters of each simulation node and bandwidth occupation parameters of links between the nodes, and obtaining resource parameters of each physical machine; a combination generation step of generating an allocation combination for allocating the simulation node to the physical machine based on the resource occupation parameter and the resource parameter; a node allocation step: based on the bandwidth occupancy parameter, obtaining the maximum bandwidth occupancy value of each allocation combination in the inter-machine link; and performing simulation node allocation by taking the allocation combination corresponding to the minimum value in all the maximum bandwidth occupation values as an optimal allocation scheme. The invention further provides a node distribution device in distributed network simulation, a computer readable storage medium and electronic equipment.

The invention provides an automation system for network simulation and a computing device, and the automation system comprises a business model automation module, a simulation execution automation module, a simulation analysis automation module, a simulation analysis automation module and a simulation analysis automation module. The business model automation module receives the abstracted topology description and the abstracted traffic description analyzed according to the business model, and respectively generates specific detailed topology description and full traffic detailed description; the simulation execution automation module receives the detailed topology description and the full-flow detailed description, generates configuration information, automatically runs network simulation and accelerates execution; and the simulation analysis automation module is used for automatically capturing and archiving important intermediate results for data analysis. According to the technical scheme, complex simulation configuration tasks can be completed through simple structured configuration change or script parameter option adding execution, meanwhile, simulation efficiency is improved, and automatic, efficient and flexible data processing and analysis capacity is provided.

The embodiment of the invention relates to the technical field of quantum communication, and discloses a quantum communication network simulation test platform and method, and the test platform comprises a scene simulation test frame, a pressure test module and a quantum channel attenuation simulator. The scene simulation test framework is used for simulating quantum communication network scenes in different running states, and the running states at least comprise running states of a quantum communication network in different distances, different noise environments and / or different attack scenes; the pressure test module is used for performing a pressure test in the quantum communication network scene simulated by the scene simulation test framework; and the quantum channel attenuation simulator is used for simulating quantum channel attenuation aiming at a quantum communication network scene in the testing process of the pressure testing module. By simulating quantum communication network scenes in running states under different distances, different noise environments and different attack scenes, the quantum secret communication network test scenes are more comprehensive, and the accuracy of test results is improved.

The invention discloses a virtual-real combined sky-ground multi-domain heterogeneous network cooperative computing simulation system and a virtual-real combined sky-ground multi-domain heterogeneous network cooperative computing simulation method. The system comprises a heterogeneous computing power prototype subsystem, a virtual simulation subsystem, a satellite-borne general computing terminal, a programmable network simulator, a heterogeneous resource management subsystem and a simulation verification system interface. Real hardware computing power characteristics are introduced through a physical board card, large-scale expansion is realized through virtual nodes, and authenticity and large-scale performance of simulation are considered; link parameters are generated according to a high-precision orbit dynamics model, and the fidelity of sky-ground network simulation is greatly improved; based on a mixed container arrangement technology, unified management and intelligent scheduling of sky, air and ground heterogeneous resources are realized, and a powerful platform is provided for verifying an advanced cross-domain collaborative algorithm; one set of system can support various simulation verification requirements of networking routing, task unloading, distributed cooperative computing, constellation cluster management and control and the like, and the research and development cost and complexity are reduced.

A container simulation network system based on a link autonomous agent is composed of a visual interaction module, a control plane module, a network simulation module and a resource management module. The modules perform information interaction and task collaboration through a uniform interface so as to realize automatic construction and management of the simulation network, a two-layer architecture design of network bridge containers and user containers is adopted, and each user container corresponds to one network bridge container; a link autonomous agent module is deployed in the network bridge container and is used for collecting a link state, calculating a performance adaptation degree and executing a scheduling operation bit; the visual interaction module realizes visual monitoring and interaction control of a simulation state; the control plane module is responsible for simulation scene analysis, link parameter generation and global scheduling management; and the network simulation module is responsible for calling a container generation tool to generate a specific container instance and carrying out resource monitoring and adjustment on the container.

The invention relates to a system (10) for emulating a variable-topology network, comprising a controller (20), a switching system (30) and network nodes (40). Each node comprises an emulation module for emulating a physical layer, and an application module with higher-level protocol layers to be tested. During execution of a test scenario, the emulation module of each node is configured to compute instantaneous information concerning the state of the node and instantaneous characteristics of the links from and to the node. The application module of the node is designed to transmit and receive packets via the emulation module, and to route the packets depending on the instantaneous information concerning the node and the links. Each emulation module is configured to control the transmission and reception of packets depending on the instantaneous characteristics of the communication links.

The invention discloses a progressive event-driven synchronous control method, which comprises the following steps of: performing parallel simulation, simultaneously starting a plurality of simulation processes, respectively simulating each core particle in a multi-core particle system, and managing the synchronization among the simulation processes by a global manager; on-demand synchronization: when the core particles simulated by the simulation process are in inter-core-particle communication, the global manager synchronizes the related processes; the process is synchronized, and the global manager ensures that other cross-process communication events earlier than the request are simulated; if a simulation process does not reach the time point, the process initiating the request is suspended by the global manager until the request can be executed; and network simulation and time sequence simulation: when the request can be executed, the global manager starts the inter-chip network simulator and simulates the communication event. According to the method, the accuracy and the operation efficiency of multi-core particle parallel simulation are remarkably improved, and the method is suitable for function verification and performance analysis of large-scale complex multi-core chips.

The invention discloses a malicious traffic confrontation sample generation method based on fine-grained network simulation, and the method comprises the steps: constructing a simulation network through an NS-3 network simulator, and transmitting and receiving malicious traffic of a real application program in a Docker container through a TapBridge mechanism; the method comprises the following steps: collecting network environment parameters, protocol stack state information and data packet header data in real time in a transmission process of malicious traffic in a simulation network; based on a Markov decision process, a state transition diagram is constructed to limit an execution sequence and conditions of confusion actions, confusion operation is performed on malicious traffic in combination with network environment parameters, protocol stack state information and data packet header data which are acquired in real time, a confusion strategy is dynamically optimized in combination with a reward function, and a malicious traffic confrontation sample is obtained. The malicious traffic confrontation sample with excellent escape detection capability is stably generated in a complex dynamic network environment on the premise of ensuring normal communication, and the protocol compliance, the transmission effectiveness and the network environment adaptability of the malicious traffic confrontation sample are improved.

The invention discloses an implementation method of an ad hoc network anti-interference system based on deep reinforcement learning, and the method comprises the steps: 1, constructing a simulation network environment based on a network simulator 3 (NS-3) simulation platform and an OpenAI Gym interface, and enabling the simulation network environment to be used for collecting a channel state in real time and feeding back the channel state to an intelligent agent; and 2, after receiving the network state, the intelligent agent feeds back a decision result obtained by learning to a network node to guide channel switching in real time. And step 3, fusing mechanisms such as a long short-term memory (LSTM) network, a competition network structure, a double deep Q network, a double deep Q network, a prioritized experience replay (PER) and the like, designing a PER-D3RQN algorithm, and carrying out efficient prediction on an interference time sequence rule. According to the method, the accuracy of channel selection can be remarkably improved in multiple interference modes, the network performance and the anti-interference robustness are improved, and the performance superior to that of a traditional deep Q-network (DQN) and a traditional frequency hopping strategy is shown.

The invention relates to the technical field of network simulation, and discloses a distributed network node evolution simulation method and system based on a time-delay grid model. The method comprises the following steps: establishing a spatial distribution time-delay model of distributed network nodes, configuring a dynamic time-delay calculation model for each node, and fusing a real-time physical distance, communication link quality, resource load and packet loss rate; defining a node state evolution rule, and dynamically adjusting an evolution process based on a node state, a historical state and a neighbor node state; a future time delay value is predicted, and simulation deviation caused by time delay is compensated in real time through a PID control mechanism; and constructing a plurality of network environments for simulation, quantitatively analyzing independent influences and comprehensive influences of various delay factors, and optimizing the distributed network based on an analysis result. According to the invention, the accuracy and stability of distributed network simulation can be effectively improved.

The present invention provides a method, device, electronic device and storage medium for realizing a virtualized network, wherein the method comprises: obtaining a file to be virtualized in a target format; the file to be virtualized stores the corresponding field content configured for each device in the network topology diagram to be virtualized; the target format is the corresponding data format when the target network simulation simulator draws and stores the network topology diagram; based on the file to be virtualized, the instance interface of the target network simulation simulator is called, and the network simulation experiment topology diagram generated by the target network simulation simulator using the file to be virtualized is obtained. With this solution, there is no need to perform the topology drawing process and manual configuration process in the network simulation simulator. Even if multiple network simulation experiments need to be carried out, the network simulation experiment topology diagram can be quickly obtained by simply calling the instance interface of the network simulation simulator, thereby improving the efficiency of the network simulation experiment.

The invention relates to the technical field of digital twinning technology and network communication optimization, in particular to a method and a system of a digital twinning network simulation driven NAT (Network Address Translation) optimization engine, comprising the following steps: constructing a virtualization mapping model of a physical network; simulating an NAT (Network Address Translation) process in a digital twin environment through a real-time simulation engine; dynamically adjusting an NAT (Network Address Translation) rule and a load balancing strategy of a physical network based on a simulation result; executing safety protection operation in combination with a machine learning algorithm; the method has the beneficial effects that a digital twinning technology and NAT optimization are deeply fused, and a visual and visual management platform is provided for network management personnel. Management personnel can monitor the network state and the NAT performance in real time through the platform and deeply analyze the network problem root by means of a simulation result, and complex field troubleshooting and manual strategy adjustment do not need to be carried out. Therefore, the difficulty and the cost of network management are reduced, the accuracy and the timeliness of management are improved, and the network management is promoted to develop towards the intelligentization and automation directions.

Embodiments of the present application provide a chip system simulation method and device and related equipment, wherein the method comprises: obtaining connection data of a chip system; the connection data comprises physical connection data, which is formed based on the physical connection relationship between each chip in the chip system; performing chip system power network simulation node extraction on the physical connection data, and constructing a power network structure of the chip system based on the extracted power network simulation nodes; and simulating the chip system based on the power network structure. The technical solution provided by the embodiments of the present application can improve the reliability of the pressure drop electromigration simulation result.

The invention provides a financial industry low-code platform development method and system based on credential adaptation, and relates to the technical field of credential industries, and the method comprises the steps: 1, mapping interactive interfaces of a core business entity and three associated business entities into four control points in a three-dimensional business topological space, so as to determine a continuous business curved surface, and calculating the normal vector directions of the continuous service curved surface at the four control points, adjusting the connection strength and the data flow direction between the service entities corresponding to the four control points according to the included angle relationship between the normal vector directions of the four control points, and constructing the closed service object network. According to the method, the business network, the simulation model and the adaptation assembly of the credential creation adaptation are constructed, the reusable assets are formed, low-code visual arrangement and credential creation environment full-process testing are combined, efficient development, asset reuse and stable landing of the financial industry credential creation adaptation application are achieved, and business process compliance and system operation reliability are guaranteed.

This invention relates to the fields of network security and network simulation technology, and discloses a method for reshaping malicious traffic based on feature serialization. By collecting traffic data from the target network environment, serialized features of load and time intervals are extracted, and session flow features are further statistically obtained. Then, based on Pareto, normal, log-normal, and Poisson probability distribution models, serialized features conforming to the target network traffic characteristics are generated, and the probability distribution model with the highest similarity to the target network traffic is selected by calculating Euclidean distance. Finally, based on this model, the load and time interval sequences of malicious traffic are reshaped to generate network attack traffic that is difficult to detect. This invention effectively improves the concealment of malicious traffic, making it more difficult for existing detection systems to identify; the generated malicious traffic can effectively test and evaluate the capabilities of network intrusion detection systems.

The invention provides an RPKI deployment influence assessment method and system based on virtual-real combination network simulation, and relates to the technical field of network communication security. The method specifically comprises the following steps: constructing a dynamically configurable high-fidelity network simulation environment based on a network simulation platform, a public internet data source, a routing protocol suite, an RPKI tool suite and a load test tool suite; constructing a data collector outside the network simulation environment, and carrying out protocol data collection, network flow collection and index data collection; and starting an abnormal event, and carrying out ROV verification analysis based on a Patricia tree and anomaly detection based on combination of K-Sigma and mode matching according to the collected data. According to the technical scheme, the potential influence of any ROA change can be accurately simulated, and the efficiency and accuracy of ROV verification analysis and the accuracy of abnormal event monitoring judgment during large-scale ROA deployment are improved.

The invention provides for testing large-scale networks such as data centres by providing a test environment comprising network emulation platforms (NEPs) emulating switching fabric and testing physic

This application relates to a method, system, and medium for simulating the physical layer of an underwater acoustic network in a network simulator. It includes: a mirror event scheduler monitoring transmission events at the physical layer; when any node triggers a transmission event, the mirror event scheduler adds the transmission event to a preset micro-batch buffer for buffering; when preset conditions are met, the mirror event scheduler performs micro-batch aggregation processing on all current transmission events in the micro-batch buffer; the mirror event scheduler generates a transmission signal based on the micro-batch aggregation result; the mirror event scheduler generates an uplink parameter file based on the transmission signal and sends it to the channel simulation end; the channel simulation end determines the target channel impulse response; the channel simulation end generates a downlink parameter file based on the target channel impulse response and the transmission signal and returns it to the network simulation end; the mirror event scheduler in the network simulation end processes the corresponding reception events based on the downlink parameter file. This application can avoid the interference underestimation and collision misjudgment caused by traditional packet-by-packet processing.

The invention discloses an efficiency evaluation method and system based on air-ground integrated network analogue simulation confrontation, and relates to the technical field of network simulation and efficiency evaluation. The method comprises the following steps: constructing a space-ground integrated network topology simulation model by using a simulation engine; injecting a confrontation event, and simulating a confrontation scene; collecting network performance index data in the confrontation scene; on the basis of the collected index data, a weighted average method is adopted, and project weights included in all levels in a pre-constructed two-level performance evaluation system are utilized, a second-level score is firstly calculated, and then a first-level score is calculated on the basis of the second-level score; based on the score of the first level, utilizing a fuzzy evaluation method to obtain a fuzzy efficiency level of the space-ground integrated network; and taking the score of the first level and the fuzzy efficiency level as an efficiency evaluation result. According to the method, accurate reproduction of a multi-dimensional dynamic scene and closed-loop integration of simulation evaluation can be realized. And meanwhile, a multi-algorithm fusion method is adopted, so that the accuracy and robustness of evaluation are improved.

This application relates to real-time high-speed clock signals for industrial network simulation. An industrial simulation system exchanges data between a virtualized industrial system and an industrial controller at high frequency and high accuracy without requiring additional network simulation hardware. Rather than using an operating system clock to time the sending of simulation device data packets from the simulation system to the industrial controller, the simulation system uses the arrival event of a data packet received from the industrial controller as a driving clock signal for sending data packets from the virtual system to the controller. Using the arrival time of a data packet from the industrial controller as a clock signal rather than the operating system's system clock can produce high-accuracy, low-jitter data exchange during simulation.

The invention is suitable for the technical field of network security, and provides a network simulation platform tree structure model topology-based arrangement display method and system, and the method comprises the steps: obtaining target service region information in response to a frame selection operation, and then traversing a topological graph, according to the method, neighbor parent-level service area information and neighbor child-level service area information are quickly determined, then related identifiers are updated based on the neighbor parent-level service area information, finally hierarchical structure tree information is effectively generated, and folding events and unfolding corresponding to service areas and hierarchical structure tree child nodes are continuously monitored. According to the method and the device, the nodes can be divided and the combined topology with the tree structure model can be constructed during simulation topology scene arrangement, so that the structure association relationship of the topology can be more intuitively and clearly embodied for a user, the method and the device have the advantages of friendly interactive display and support of multi-level nesting, and the use experience of the user is greatly improved.

The present invention discloses a communication network simulation method based on digital twin technology, which relates to the technical field of communication network simulation, and includes importing the structural data and network data in the actual communication environment into digital twin models with various topological structures for simulation; calculating the conventional evaluation coefficients of each node and the conventional evaluation coefficients of each topological structure; calculating the limit evaluation coefficients of each node and the limit evaluation coefficients of each topological structure; calculating the comprehensive evaluation index of each topological structure, determining the optimal topological structure, and calculating the comprehensive evaluation index of each node in the corresponding topological structure to determine the optimization priority ranking of each node. The topological structure most suitable for specific application requirements can be selected, thereby improving the overall network performance and efficiency. By determining the optimization priority according to the comprehensive evaluation index of each node, efforts can be concentrated on optimizing the nodes with poor performance, improving the overall performance of the network.

The invention relates to a verification system and a verification method for a security protection application. The system comprises a network attack simulation engine and verification equipment, the network attack simulation engine is connected with the verification equipment through a network; the network attack simulation engine comprises a behavior mapping module, a logic mapping module, a three-link linkage module and a zero-day effect substitute module; the behavior mapping module is respectively connected with the logic mapping module and the three-link linkage module; and the logic mapping module is connected with the three-link linkage module. According to the verification system, through the zero-day effect substitute module, the verification system of the security protection application can simulate and test the influence of unknown vulnerability attacks under the condition that no real vulnerability codes exist, and the coverage of network simulation attacks of the verification system of the security protection application is improved; the verification system of the security protection application ensures that the defensive performance of the security protection application can be comprehensively evaluated when the network simulation attack is coped with through the linkage of the network attack simulation engine and the verification equipment.