135 results about "Virtual link" patented technology

The present invention relates to the technical field of wireless sensor networks, and to an average consistency time synchronization method based on a multi-hop virtual link and event triggering. According to the method, in the case that a communication delay is present in a wireless network, a least squares estimator is used to restrain the effect of the delay in the relative frequency offset estimation process; clock information of nodes is fully called by means of the multi-hop virtual link for update, thereby effectively increasing the clock synchronization speed; an event triggering policy is used to reduce a transmission frequency between the nodes, thereby effectively reducing communication overhead; and a consistency algorithm is used to update logic clock parameters of the nodes, thereby realizing global consistency of clocks of the nodes in a wireless sensor network. According to the present invention, the effect of the communication delay in the wireless sensor network is taken into consideration, an iterative least squares estimator is used to obtain a high-precision relative frequency offset value to improve the synchronization precision, and by using an interaction mechanism of the multi-hop virtual link and event triggering, the communication overhead is effectively reduced while increasing the convergence speed of a clock synchronization error.

The invention discloses a network slice dynamic scheduling system and method based on power business differences, and belongs to the technical field of power wireless communication. The scheduling system comprises a slice layer, a service layer and a network layer, the slice layer calculates a network slice resource reservation proportion according to a service layer power service type, service delay and a service arrival rate, and performs weight calculation and sorting on network slices; the service layer calculates priorities of to-be-processed power services according to resource demands of different power service requests and service request delays, sorts the priorities, and distributes the to-be-processed power services to network slices according to network slice weights and the priorities of the to-be-processed power services; and the network layer is used for carrying out network slice link configuration by taking physical link load balancing as a constraint and taking the minimum virtual link time delay of the network slice as a target, and outputting an optimal link configuration result of the network slice. According to the invention, link time delay and load balancing are comprehensively considered, and optimal allocation of resources and service requirements of businesses are guaranteed.

The invention relates to the technical field of data classification, in particular to a hospital intelligent inquiry log analysis method and system.The method comprises the following steps that medical concept depth is counted, symptom keywords are extracted, statistical information gain and semantic consistency scores are calculated, split decision-making indexes are generated by combining the gain and the scores to construct an intention classification tree, and an intention classification result is obtained; inputting a log to generate an inquiry intention identifier, recognizing an error node based on diagnosis and treatment correction feedback and updating a punishment value, establishing a virtual error correction link, calculating a path confidence fusion node, and establishing a physical branch to generate a reconstruction classification tree when a guide weight exceeds a limit. According to the method, keyword statistics is upgraded into three-dimensional feature analysis by introducing medical concept hierarchies, a classification tree following a medical system is constructed, a reverse penalty and virtual link mechanism is constructed by using feedback, node fusion and reconstruction are executed based on confidence, classification logic self-adaptive evolution is realized, and intention recognition interpretation and robustness are improved.

The invention discloses a virtual-real fusion network communication performance real-time monitoring method, device and equipment and a medium, and belongs to the field of communication monitoring, and the method comprises the steps: monitoring a communication link performance test instruction issued by a user in real time; wherein the communication link comprises a real link, a virtual link and a virtual real link; when a first instruction of only performing performance test on one communication link is received, determining the type of the communication link according to the nodes at the two ends of the communication link, and selecting a corresponding test method to test the performance of the communication link according to the type of the communication link; and when a second instruction for testing the performance of all the communication links is received, testing the performance of all the real links and all the virtual links in parallel, and then testing the performance of all the virtual links in batches according to the path lengths of the virtual links. Therefore, by implementing the application, the problem of low communication performance monitoring efficiency under a complex virtual-real hybrid network structure can be solved.

Embodiments herein disclose for example a method performed by a controlling network node for handling one or more virtual network functions (VNF) in a communication network. The controlling network node initiates a setup of virtual resources for a VNF, wherein an aggregating connection point (CP), indicates a set of CPs to be connected to a same external virtual link. The controlling network node transmits configuration data to a managing function wherein the configuration data comprises an indication.

A virtual network resource allocation method in a multi-server scene is based on a network communication system of a virtual network and a physical network, resources needed by virtual nodes comprise computing power, memory and storage, and the demand of a virtual link is bandwidth; the physical network is composed of physical nodes and physical links, and the core of virtual network resource mapping is that virtual nodes and links are reasonably distributed to the physical nodes and the links; in a multi-server environment, communication among virtual nodes can cross a plurality of physical servers, so that the number and efficiency of cross-host links become the key to influence the system performance; a mapping algorithm based on the adaptation degree is adopted; judging whether the physical node can meet the requirement of the virtual node or not by calculating the adaptation degree between the virtual node and the physical node; the adaptation degree is calculated according to resource requirements of the virtual nodes and available resources of the physical nodes, and only the physical nodes with the adaptation degree reaching a set threshold value are regarded as effective mapping targets.

The invention provides a source-load-storage communication virtual network mapping method and device, and belongs to the field of communication. The method comprises the following steps: constructing a virtual network mapping model of source-load-storage communication; obtaining a region service request of a target region; wherein the regional service request comprises a plurality of virtual nodes and a plurality of virtual links, the virtual nodes comprise a starting node and a target node, and the virtual links are links between the corresponding starting node and the target node; according to the virtual network mapping model and the regional service request, establishing a target function for mapping the virtual nodes to the physical nodes by taking the minimum sum of propagation delays of all the physical nodes as a target; solving the objective function to obtain an optimal node mapping scheme; and based on the virtual network mapping model and the optimal node mapping scheme, mapping the plurality of virtual links to obtain a virtual network mapping scheme. The communication efficiency can be improved, and safe and economical operation of a power system is guaranteed.

The invention relates to an intelligent ship network optimization method, system and device based on multi-link convergence and a medium. The method comprises the following steps: firstly, acquiring multi-network link connection parameters of the intelligent ship, constructing an adaptive environment, modifying a protocol stack, and integrating a physical link into a virtual link to realize resource convergence; and based on the real-time parameters of the virtual link and the physical link, dynamically distributing traffic by adopting an improved aggregation protocol, and generating a load balancing scheme. And then, regularly sending a detection packet quality index, and predicting a link quality trend in combination with historical data and navigation longitude and latitude. And finally, dynamically adjusting flow distribution according to a prediction result, an application real-time demand, a bandwidth demand and a current position tariff characteristic, and generating a ship-shore communication scheme considering both efficiency and cost. By adopting the method, the stability, reliability and economy of ship-shore communication of the intelligent ship can be effectively enhanced, and the method is suitable for multi-scene network monitoring optimization.

The invention discloses a service resource allocation method oriented to a multi-dimensional heterogeneous environment of an intelligent computing fusion network, which comprises the following steps of: receiving a computing network fusion service request ASR in the multi-dimensional heterogeneous environment, and deploying virtual nodes and virtual links to physical nodes and physical links meeting constraint conditions in the intelligent computing fusion network to obtain a plurality of allocation schemes; taking each distribution scheme as a chromosome, and taking all chromosomes as an initial population; randomly selecting a parameter from the segment length set, and randomly pairing the chromosomes in pairs; dividing each pair of chromosomes into a plurality of gene segments according to the parameters, and calculating the fitness value of each gene segment; performing segmented crossover and mutation operation on each pair of chromosomes to obtain a new individual; updating the population by adopting the new individuals, then judging whether the number of iterations is equal to a preset number of iterations, and if so, selecting the individual with the highest fitness value in the population as a resource allocation scheme of the computing network convergence service request ASR; otherwise, returning to the parameter selection step.

The invention provides a virtual network mapping method, device and equipment based on an unmanned aerial vehicle cluster scene, and the method comprises the steps: obtaining a topological graph sequence of an unmanned aerial vehicle cluster network when a virtual network embedding request is received; extracting space-time dynamic features among the topological graphs in the topological graph sequence based on a pre-constructed feature extraction network; inputting the space-time dynamic characteristics into a pre-trained node strategy generation network to generate a node mapping strategy; mapping to-be-embedded virtual nodes to unmanned aerial vehicle nodes of an unmanned aerial vehicle cluster network based on a node mapping strategy; and after all the virtual nodes are successfully mapped, mapping the virtual link to be embedded into the shortest physical link. According to the embodiment of the invention, the virtual mapping requirement in a network dynamic scene can be met; and the virtual nodes and the virtual links are mapped in sequence by adopting a two-section type mapping method, so that the nodes and the links can be successfully mapped, and the mapping success rate is improved.

The invention relates to a virtual network mapping method based on double-agent reinforcement learning in a space division multiplexing elastic optical network, belongs to the technical field of communication, and aims to solve the problems of multidimensional resource allocation complexity, fiber core crosstalk and spectrum fragmentation in the space division multiplexing elastic optical network. According to the technical scheme, collaborative optimization mapping is carried out on virtual network requests by setting a link fiber core mapping agent and a frequency spectrum mapping agent, and the collaborative optimization mapping comprises the steps of initializing an underlying optical network topology and a virtual network topology, sorting virtual network sets according to the total bandwidth of the requests, embedding virtual links in a descending order, and executing physical node embedding and path searching. And the intelligent agent selects a link fiber core and spectrum allocation based on the network state feature matrix, and a model is trained through a reward mechanism to realize efficient resource matching. The technical effects are that the real-time performance and efficiency of virtual network mapping are obviously improved, the service blocking rate is reduced, the spectrum resource utilization rate is optimized, and the overall load capacity of the network is enhanced.

The invention discloses a multi-link aggregated cloud native network system and a flow scheduling method. The system comprises an application sensing layer, a virtual link layer and a physical link layer, the application sensing layer is connected with the virtual link layer and used for analyzing network traffic to be distributed to obtain features of the network traffic, and the features comprise traffic types, priorities and bandwidth requirements; the virtual link layer is connected with the physical link layer, and is used for detecting the states of the plurality of links to obtain the state information of the plurality of links, and determining the flow distribution strategy of the plurality of links based on the characteristics and the state information; and the physical link layer is used for carrying out flow distribution on the plurality of links based on the flow distribution strategy. According to the invention, the technical problem that the traditional cloud native network depends on single link transmission, so that network congestion is easy to occur when the service flow is increased sharply is solved.

The invention provides a congestion control method and device, equipment, a storage medium and a program product, and the method comprises the steps: obtaining a response time delay corresponding to terminal equipment, and enabling the response time delay to be the duration between the updating time of a to-be-confirmed pointer and the current time, the pointer to be confirmed points to the serial number of the first byte which is sent by the terminal equipment but does not receive the confirmation message; obtaining the path time delay of each virtual link in a plurality of virtual links corresponding to the terminal equipment, the path time delay being determined according to the transmission round-trip duration corresponding to the plurality of data packets on the virtual links; and adjusting a congestion window of the terminal device according to the response time delay, and performing load balancing processing on a plurality of physical links corresponding to the plurality of virtual links according to the path time delay of each virtual link, the congestion window being used for indicating the maximum data volume continuously sent by the terminal device. Through the congestion control method provided by the invention, the network congestion can be reduced, and the load balancing effect of the physical link can be improved.

The invention discloses a VXLAN (Virtual Extensible Local Area Network)-based data transmission method and device, a storage medium and electronic equipment, and the method comprises the steps: after a plurality of physical links between two user terminals are virtualized into a virtual link through a VXLAN technology, the priorities of the plurality of physical links are dynamically adjusted through a dynamic routing protocol, identifying the plurality of physical links as equivalent paths; and based on the equivalent path, dispersing service traffic to the plurality of physical links for transmission through a load sharing algorithm, and monitoring the state of the physical link in real time, and switching the service flow to an available target physical link through the load sharing algorithm when detecting that any physical link has a fault. According to the scheme, the limitation that a traditional routing protocol only supports double-link loads is broken through, a plurality of physical links cooperatively work logically, the link resource utilization rate is improved, automatic switching during faults is achieved through dynamic priority adjustment, and the network reliability is enhanced.

The embodiment of the invention provides a local priority forwarding implementation method and device, network equipment, a storage medium and a program product, and relates to the field of data communication. According to the method, a virtual link aggregation is created for a target link aggregation, and member ports of the virtual link aggregation are consistent with the target link aggregation. And deleting the physical ports of the other network devices recorded in the member ports of the target link aggregation. According to the method, the known unicast message is forwarded through the local physical port in the target link aggregation, and the non-known unicast message is forwarded through all member ports in the virtual link aggregation, so that the normal forwarding of the non-known unicast message is ensured while the local priority forwarding of the known unicast message in the stacking system is realized. According to the invention, a network device which does not support a local priority forwarding function can realize local priority forwarding of a known unicast message on a chip level, and the local priority forwarding is realized completely through a link aggregation function, and other chip functions of the network device are not influenced.

A congestion control method and apparatus, a device, a storage medium, and a program product. The method comprises: acquiring a response delay corresponding to a terminal device, wherein the response delay is a duration between an update moment of a pointer to be acknowledged and the current moment, and said pointer refers to the sequence number of a first byte that has been sent by the terminal device but for which an acknowledgment message has not yet been received; acquiring a path delay of each virtual link among a plurality of virtual links corresponding to the terminal device, wherein the path delay is determined on the basis of transmission round-trip durations corresponding to a plurality of data packets on the virtual link; and adjusting a congestion window of the terminal device on the basis of the response delay, and on the basis of the path delay of each virtual link, performing load balancing processing on a plurality of physical links corresponding to the plurality of virtual links, wherein the congestion window is used for indicating the maximum data volume the terminal device may consecutively send. The congestion control method can reduce network congestion and improve the load balancing effect of physical links.

The AFDX network protocol fuzzing method of the application is suitable for testing of an airborne network protocol, comprising: S1, taking configurable parameters in the AFDX protocol as input of the test data packet, wherein the configurable parameters comprise virtual link configuration, bandwidth configuration, time scheduling configuration and protocol frame field configuration; S2, calling the test data packet to test the network protocol; S3, sending the test data packet to the tested device through the AFDX network; S4, obtaining the test result of the tested device; and S5, based on the test result, marking the test case causing an abnormal scenario as an effective test case by using artificial or automatic means, thereby improving the test efficiency of the network protocol and related software.

A client device communicates with a network via a host device as an intermediary through a virtual link technique in which an Internet Protocol (IP) tunnel is established between the client device and the host device, and a plurality of physical links between the host device and the client device are assigned or otherwise associated with the IP tunnel such that the IP tunnel acts as a single virtual link between the client device and the host device, with fixed IP addresses, but therein data can be communicated between the client device and the host device on different physical links according to routing policy that includes routing rules for routing data packets between the different physical links according to one or more parameters.

According to the wide area network flow scheduling method for sensing link congestion disclosed by the invention, the congestion hotspot link in the network is identified in advance by analyzing the link congestion condition, the virtual link capacity is generated by scaling the link capacity of the congestion hotspot link, and the flow scheduling for coping with the network fluctuation is carried out based on the virtual link capacity. According to the method, the traffic is enabled to avoid the congestion hotspot link, so that a buffer space is provided for the traffic fluctuation, the robustness to the traffic fluctuation is improved, a subsequent routing strategy is optimized by generating the virtual link capacity, and a specific traffic engineering scheme does not need to be bound, so that the method can be seamlessly integrated into various existing traffic engineering schemes; only a small number of congestion hotspot links are intervened, so that the utilization rate, namely the median performance, under the conventional condition is slightly influenced while the performance under the worst condition is greatly improved to deal with burst traffic.

The invention belongs to the technical field of communication, and relates to a network traffic configuration method and device, electronic equipment and a computer readable storage medium. The network traffic configuration method at least comprises the following steps: acquiring a virtual network traffic configuration request, wherein a virtual network comprises a plurality of virtual links; acquiring information of a physical network, wherein the physical network comprises a plurality of physical links; obtaining a bandwidth demand of a virtual link and a bandwidth capacity limit of a physical link; mapping each virtual link to a plurality of actual mapping paths on a physical network by adopting a path divisible mapping algorithm; each actual mapping path comprises a plurality of physical links which are connected in sequence, and the actual mapping paths can meet the bandwidth requirements of the virtual links and the bandwidth capacity limitation of the physical links at the same time; packaging the information containing the actual mapping path in a data packet; and the data packet can be transmitted along the actual mapping path. According to the network flow configuration method, the newly added virtual link can be conveniently embedded into the physical network.

To provide a technique for processing a route search at high speed.SOLUTION: A patrol route guidance system includes: a map information acquisition unit that acquires map information indicating a road network represented by a link and a node that is an end point of the link; a virtual map information acquisition unit that acquires virtual map information indicating a virtual road network configured by converting a plurality of continuous links into a single virtual link; a patrol route acquisition unit that acquires a patrol route that starts from a departure point and patrols around a plurality of points based on the virtual map information; and a guidance control unit that causes a guidance unit to guide the patrol route using the map information.SELECTED DRAWING: Figure 1

The invention relates to multi-domain virtual network security mapping for cross matching and optical path separation fault tolerance, and belongs to the technical field of optical fiber communication. According to the method, a double-layer block chain network architecture is adopted, a main chain is used for inter-domain resource collaborative scheduling and information synchronization of an optical network, and a secondary chain realizes intra-domain resource autonomous management and trust maintenance of the optical network; in the virtual node mapping stage, mapping preference values between virtual nodes and physical nodes are introduced to construct a mapping bigraph, and virtual node mapping is optimized through a cross matching mechanism; in the virtual link mapping stage, the security and reliability of quantum key distribution are guaranteed by adopting multi-path routing and a security redundant path, and an encrypted data transmission optical path based on minimum spectrum consumption is adopted; punishing malicious nodes according to a virtual network mapping result, and tracing and updating credibility values of non-malicious nodes participating in virtual network mapping through block information. According to the method, the security and the resource utilization rate of virtual network mapping in the optical network multi-domain environment can be improved.

The invention belongs to the field of communication, and relates to a method and a system for optimizing resource allocation in an RAN (Radio Access Network) slice. The method comprises the following steps: receiving an RAN (Radio Access Network) slicing request, wherein the RAN slicing request comprises a plurality of virtual network functions and corresponding virtual links; constructing a first priority list based on the resource demand or link degree of each virtual network function in the RAN slice request; constructing a second priority list based on available resources of each underlying node in the underlying network; and mapping each virtual network function to a corresponding bottom layer node by adopting a preset RS configuration scheme based on the first priority list and the second priority list. According to the method, the complex relation and interdependence between the bottom layer network nodes are concerned, so that the resource utilization efficiency is improved, internal fragmentation is avoided, the link requirement and bandwidth requirement between virtual network functions are met, and the overall performance of the network and the user experience are improved.

A virtualized network function (VNF) of a network function virtualization (NFV) link level architecture includes a management plane function (MPF) to map a logical interface as a virtual interface in a control plane function (CPF) of the VNF. The MPF maps a logical resource of the NFV virtualization link level architecture as a shadow resource on one or more data plane functions (DPFs) of the VNF, wherein a virtual link is formed by the logical interface, the shadow resource, and the virtual interface. One of the DPFs receives a packet over the virtual link from a switch and classifies a type of the packet. In response to the packet type being a data packet, the DPF aggregates the packet with other data packets to form aggregated data packets and sends the aggregated data packets to the switch.

The invention discloses an AFDX (Avionics Full Duplex Switched Ethernet) network data sending method based on a service priority, which comprises the following steps of: periodically distributing tokens for a virtual link queue, and determining a distribution period based on a bandwidth distribution interval parameter of a VL (Virtual Link) and a system timer period; calculating the accumulated number of tokens of each VL queue, and when the accumulated number of tokens meets the BAG parameter requirement, marking the accumulated number of tokens as meeting the sending condition; the data packets meeting the sending conditions are ranked in two levels: 1) the first level is ranked from high to low according to the configuration and the service priorities; 2) the second level is ranked from large to small according to jitter time (JITTER) of the data packets under the same service priority; and sending the sorted data packets to the AFDX network in sequence. The invention further discloses a detailed priority ranking method which comprises ranking of the VL, the SUB VL and the TOS. The method has the advantages of low delay of key services, efficient utilization of network resources, compatibility with the A664 standard and the like.

A method for detecting security breach in avionics network is disclosed. The method comprises generating a signal corresponding to avionics network for each source end with a predefined timestamp; transmitting the signal from each source end to each destination end with the predefined timestamp via virtual links; determining whether the signal received by each destination end is at the predefined timestamp; determining whether the message signature associated with the signal received by each destination end is valid, upon determining the signal received by each destination end is at the predefined timestamp; determining whether an error count of errors exceeds a predefined threshold value upon determining the message signature is not valid or upon determining the signal received by each destination end is not at the predefined timestamp; and generating an alert associated with the errors upon determining the error count exceeds the predefined threshold value, for a user.

A multi-channel data communication link, such as a PCIe link, may be configured as a virtual link. Each virtual link may correspond to a unique subset of channels. Data packets provided by a plurality of virtual machines and associated virtual functions may be buffered in a transmit queue. Each transmit queue may correspond to a unique one of the virtual links. Data may be provided from each of the transmit queues to a data transmit circuit coupled to the active channel.

The invention provides a Bluetooth playing equipment communication method and related equipment. The method is applied to a master device of a Bluetooth playing device group. The main device and the sound source device are connected through low-power-consumption Bluetooth, and a first CIS link is established between the main device and the sound source device; the main device receives audio data sent by the sound source device through the first CIS link and plays the audio data; a TWS Bluetooth connection channel is established between the master device and the slave device; the blue method comprises the following steps: acquiring first configuration information of a first CIS link; the first configuration information is sent to the slave device through the TWS Bluetooth connection channel, so that the slave device establishes a first virtual link with the sound source device based on the first configuration information, and the first virtual link is used for monitoring audio data transmitted between the master device and the sound source device through a first CIS link. The method can reduce the power consumption of the Bluetooth playing device.

The invention discloses a message delay analysis method for ARINC664 terminal traffic shaping. The method comprises the following steps: calculating an arrival curve of each message; adding the arrival curves of the messages to obtain a message frame stream aggregation arrival curve alpha w of all frameflowi in the sub virtual link queue; calculating a strict service curve beta < w > (t) of the sub-virtual link; and taking the maximum horizontal distance between the aggregation arrival curve and the strict service curve as the maximum delay of sub-virtual link traffic shaping, and taking the maximum value of the maximum delay of all sub-virtual link traffic shaping as the maximum delay of virtual link traffic shaping. The method can be used as a basis for deterministic analysis of the ARINC664 network.

The invention provides a two-stage fast routing calculation method for a large-scale multi-layer satellite network. The two-stage fast routing calculation method comprises the following steps: respectively dividing each layer of actual physical topology into a plurality of sub-topology blocks; constructing a virtual topology for the complete physical topology according to the links between the actual physical nodes and the corresponding relationship between the links and the sub-topology blocks; according to the mapping relation between the source physical node and the virtual topology and the mapping relation between the target physical node and the virtual topology, virtual routing between the source virtual node and the target virtual node is calculated in the virtual topology; restoring the virtual nodes and the virtual links in the virtual route into partial physical topology; and calculating a physical route between the source physical node and the destination physical node in the partial physical topology. According to the method, the routing calculation process of the large-scale multi-layer satellite network is decomposed into two stages, the first stage is virtual routing calculation in the virtual topology, the second stage is physical routing calculation in part of physical topology, and finally the effect of greatly improving the routing calculation speed in the large-scale multi-layer satellite network is achieved.