712 results about "Link layer" patented technology

The invention relates to an industrial control system security policy adaptive configuration method and device and a readable storage medium. According to the method, a control instruction stream, a process variable sampling value and link layer message metadata are synchronously collected, an association hypergraph fusing network semantics, control semantics and physical semantics is constructed to represent a system state, and a sampling period is divided into a plurality of time slots with fixed lengths. In each time slot, self-supervised learning is utilized to extract a topology embedded vector group, and a system operation rule is represented. A robustness envelope interval is generated by calculating a statistical distance between a current time slot and a historical baseline, and is used for driving a reinforcement learning model to generate a security policy parameter set. And executing corresponding access control, traffic shaping and integrity verification operations in the next time slot, generating receipt vector feedback model update according to an execution result, outputting a micro-policy patch with a hash signature and a timestamp, and sending the micro-policy patch to the edge security gateway to realize deployment, thereby realizing closed-loop adaptive optimization of the security policy in the dynamic environment.

The invention relates to a task and communication combined path planning method for a multi-base unmanned system. The method comprises the following steps: mapping task distribution into a target node layer, and constructing a communication link into a transmission link layer to form a task and communication double graph; establishing a dynamic coupling edge between the graphs to represent the influence of a task execution behavior on the communication quality; an interactive influence propagation model is introduced in the time dimension, and the feedback effect of communication link fluctuation on the task progress is simulated; providing time-space dynamic cost evaluation input for path planning; defining a task feasible domain and a communication strong connectivity domain in a time-space domain based on the double-layer graph output by the technology; constructing a joint feasibility domain (JFE), only allowing path planning to be expanded in the domain, and processing a splitting problem of communication repair after the path planning; performing multi-target compression on the path, and balancing task path time consumption, node connection stability and path redundancy consumption indexes; a graph homotopy simplification mechanism is introduced, and redundant edge paths in the JFE are compressed.

The invention discloses a power line carrier communication protocol data link layer simulation method, which comprises the following steps of: constructing a physical layer interface simulation module, simulating power line carrier or wireless air interface transmission through TCP socket communication, and creating a high-priority task process to process time slot-level time sequence synchronization for triggering a physical layer transceiving action at a specified time slot; configuring a time sequence synchronization control mechanism, obtaining a timestamp carried by a beacon frame sent by a concentrator, calling a clock synchronization function to align a site local clock with the timestamp when receiving the head of the beacon frame, adding delay compensation before sending data, and delaying and starting a physical layer receiving action to offset IP network transmission delay when receiving the data; a data frame processing flow is realized, a header callback function is controlled through a registration frame to respond to a physical layer state change, TCP message data is cached by using an annular queue, and a physical layer interface simulation module analyzes a message, distributes a memory and processes a load at a specified time slot after time sequence synchronization.

The invention discloses a network communication method and device suitable for a space-based distributed operating system, and the method comprises the steps: a satellite gateway node obtains a network layer data packet transmitted by an edge computing node, carries out the processing and packaging of the network layer data packet according to a data link layer protocol in a CCSDS protocol system, and transmits the network layer data packet to a ground station through a baseband and a radio frequency device; and after acquiring the data link layer data packet, the node, connected with the baseband equipment, of the ground station processes the data packet step by step according to a corresponding data link layer protocol and removes a data link layer packet header until an internal network layer data packet is acquired, and sends the internal network layer data packet to a corresponding control node. Establishing a communication tunnel between an edge computing node and a control node in the space-based distributed operating system; and the control node transmits the network layer data packet to the edge computing node through the communication tunnel by using the same communication line. According to the invention, the process running at the edge computing node and the control node can carry out network communication without any adaptation.

The invention discloses a computing system and a control method, device, equipment, medium and product thereof, and relates to the technical field of computers.A host device, a first switch and an acceleration computing device are divided, the first switch comprises a plurality of interconnected switching controllers, and uplink ports of the switching controllers are connected with the host device; the downlink port is connected with the acceleration computing device, the binding relation of the physical link layer between the mainboard and the acceleration card is removed, the port configuration and the resource allocation path of the exchange controller can be flexibly adjusted, and the acceleration computing resources can be allocated according to needs. The first board card provided with the first slot and the cable adapter plate are arranged in the acceleration computing device, so that the acceleration computing device with high-density deployment is realized. Therefore, the method solves the problem that the expansion capability of acceleration computing resources of a multi-card system reaches a bottleneck, and lays a foundation for expanding large-scale computing power by a single host and constructing a multi-host shared large-scale computing resource pool.

Provided are a semiconductor device for changing a link speed and a link width of a peripheral component interconnect express (PCIe) link and an operating method thereof. The semiconductor device includes the PCIe link including a plurality of lanes, and a controller configured to transceive a data link layer packet (DLLP) including a number of times of transition and a maximum number of times of transition from an L0 state to an L0p state through the PCIe link, based on a first bit error rate (BER) of a data packet received through the PCIe link and a first criterion value in the L0 state, and determine whether to perform at least one of a link speed changing operation performed in a recovery state, or a link width changing operation performed in the L0p state, based on the number of times of transition and the maximum number of times of transition.

The invention belongs to the field of star flash mouse communication, and discloses a star flash mouse low-power-consumption communication system and method based on Polar code and SLE collaborative optimization, the system adopts a layered architecture design, collaborative optimization of energy efficiency and performance is realized through deep coupling of a physical layer and a link layer, and the performance of the system is improved. The core of the system is composed of three functional units including a Polar code coding module, an SLE control engine and a cross-layer optimization interface, and a complete closed-loop control system is formed. According to the invention, through deep cooperation of the Polar code and the SLE mechanism, the overall power consumption is reduced by 42.7% compared with the traditional scheme; according to the Polar code dynamic construction method based on track prediction, an ultra-low bit error rate of 10 <-5 > magnitude can still be kept in a 2.4 GHz complex interference environment, and in combination with signal-to-noise ratio self-adaptive coding parameter adjustment, it is ensured that transmission delay within 0.5 ms is always kept from a low-speed office scene to a high-speed electronic sports scene; in the aspect of engineering implementation, the method has the capability of quickly adapting to hardware platforms of different manufacturers, and a complete solution with high performance and low cost is provided for large-scale commercial use of the satellite flash technology in the consumer electronics field.

The invention relates to the technical field of industrial communication networks, in particular to a method for quickly forwarding messages from a PCIE (Peripheral Component Interface Express) interface to a WIA (Wireless Interface Architecture) interface, which comprises the following steps of: simultaneously receiving PCIE messages and WIA-FA protocol messages through a hardware logic circuit; analyzing the message in a data link layer to obtain an analysis result comprising data load and address information; packaging the analysis result according to a pre-configuration rule to generate a data frame conforming to a target protocol; and constructing a sending descriptor for the generated data frame, and sending the data frame from a corresponding interface through a direct memory access mechanism. According to the method, parallel analysis and protocol conversion of messages are achieved through a hardware logic circuit, fast address conversion is achieved through a pre-configured address mapping table, and zero-copy data transmission is achieved through a direct memory access mechanism. According to the invention, software protocol stack processing is replaced by a hardware processing flow, so that communication delay and CPU resource consumption are effectively reduced.

Described herein are devices, systems, methods, and processes for optimizing the utilization of large bandwidth channels in wireless communication networks. This is achieved by an access point (AP) identifying parts of the channel available for standard power (SP) transmissions and using novel puncturing messages to allow simultaneous low-power indoor (LPi) transmissions on the “punctured” parts of the channel. The AP can implement different modes to allow concurrent transmissions at SP level on the SP-allowed parts of the channels and at LPi level on part of the channel that do not allow SP transmissions. The AP can also switch unicast communication with a client device to LPi but with a larger channel width as the device nears the AP. The techniques allow for fuller utilization of large bandwidth channels where only a part of the channel is available for SP transmissions, thereby improving network efficiency.

The invention discloses a PCIe (Peripheral Component Interconnect Express) switching chip for realizing calculation in transmission, a switch with the PCIe switching chip and a communication system with the PCIe switching chip, the switching chip comprises a physical layer, a data link layer, a transaction layer and a calculation module, and is used for responding to the condition that a specific prefix of a transaction layer data packet is analyzed by the transaction layer and carries a preset calculation instruction; if yes, the calculation module analyzes the calculation instruction analyzed by the transaction layer so as to extract a calculation parameter field in the calculation instruction; the calculation module generates and executes a task of calculating the data in transmission according to the calculation parameter field, and calculation does not need to be started after all the data to be calculated are in place; firstly, part of the currently received data to be calculated is calculated to obtain an intermediate calculation result; and aggregating the subsequent newly received data to be operated and the intermediate operation result. According to the invention, by inserting the programmable calculation path into the PCIe switch, an innovative mechanism of'transmission while calculation 'is realized, the system delay is reduced, and the bandwidth occupation is reduced.

The invention relates to an AI-based service anomaly detection method, and belongs to the technical field of data processing. Comprising the following steps: acquiring runtime data of a production environment, including service layer data, hardware layer data, network layer data and link layer data; supplementing the collected data, carrying out classified marking on data information, and defining a hierarchical relationship among the data; sending the data to an AI model, carrying out correlation analysis through a time dimension and a space dimension, and carrying out link analysis; the AI large model updates the knowledge graph and generates the model according to each operation and maintenance; and displaying the fault knowledge graph by using a graphical front end. According to the AI-based service anomaly detection method provided by the invention, multi-dimensional data are comprehensively collected and correlation analysis is carried out, so that rapid positioning of a fault is realized. The fault discovery time is greatly shortened through the real-time detection capability, and the fault processing efficiency is further improved through incremental updating and intelligent optimization of the knowledge graph.

The invention belongs to the field of PCIe (Peripheral Component Interconnect Express) chips, and relates to a CXL switching chip of a multi-core-grain architecture and a cross-core-grain routing switching method thereof, and a plurality of CXL switching core grains with uniform specifications are packaged and interconnected to form the CXL switching chip; each CXL switching core particle comprises a plurality of ports, each port can be configured to be in a CXL mode and a D2D mode, and the port of each CXL switching core particle at least comprises a physical layer, a CXL link layer, a CXL transaction layer, a D2D routing layer, a bypass and a multipath selection module; the CXL switching chip further comprises a multi-VC on-chip CXL switching network, and the multi-VC on-chip CXL switching network comprises at least one order-preserving switching VC and one out-of-order switching VC. According to the method, CXL switching chips of various specifications can be flexibly constructed, the design complexity and verification difficulty of the large-scale or multi-port CXL switching chips are effectively reduced, and the production yield of the chips is improved.

The invention belongs to the technical field of wireless communication networks, and discloses a multi-modal adaptive routing equipment network optimization method based on artificial intelligence, which comprises the following steps of: extracting network flow metadata in a data link layer by adopting deep packet inspection, and analyzing and predicting bandwidth requirements in n periods of time in the future based on a time sequence; planning channel resources by adopting a Nash equilibrium algorithm according to the bandwidth requirement, and generating a channel allocation instruction; synchronously acquiring multi-band channel state data, and constructing a three-dimensional radio frequency environment signal spectrum; analyzing the three-dimensional radio frequency environment signal spectrum, searching a frequency band combination with the minimum interference, and generating a frequency band switching instruction; integrating the channel allocation instruction and the frequency band switching instruction, generating a network QoS optimization strategy, and issuing the network QoS optimization strategy to the routing equipment for execution; and the network transmission efficiency, the security and the adaptive capacity of the routing equipment are improved.

The invention provides a vehicle-mounted passive optical network area gateway and a protocol conversion method. The gateway comprises an interface module which comprises a plurality of communication interfaces, wherein the communication interfaces are used for receiving messages of a low-speed network protocol; the data processing module adopts an FPGA (Field Programmable Gate Array) core board and is used for receiving a message, extracting effective information from the message, packaging the effective information to obtain an Ethernet protocol frame and converting the Ethernet protocol frame into an SDU (Service Data Unit); and the ONU optical module is used for performing data link layer processing on the SDU to obtain an uplink FS burst frame, and performing physical layer processing on the uplink FS burst frame to obtain a burst mode optical signal frame. The gateway can realize data access of multiple paths of CAN nodes, LIN nodes and vehicle-mounted Ethernet nodes at the same time, meets the communication protocol conversion function of low-speed nodes in each region in a real vehicle environment, and is integrated into a whole vehicle all-optical backbone network. The method is used for converting data complying with a low-speed network protocol into data complying with an XGS-PON protocol.

The invention discloses a wireless ad hoc network routing and resource cross-layer joint optimization method based on a genetic algorithm. The method comprises the following steps: step 1, aiming at a plurality of end-to-end communication services in a wireless ad hoc network, carrying out mathematical modeling on a normalized difference sum of each service flow path hop count and a theoretical minimum value thereof and a constraint condition; performing joint optimization on link layer resource allocation and network layer routing decision; and step 2, solving the mathematical model based on a genetic algorithm to realize the targets of reasonable distribution of network resources and optimization of service quality. According to the method, link layer resource allocation and network layer routing decision are jointly optimized in a global mode under the condition that network communication resources are limited, it is ensured that a service flow is close to shortest path transmission as far as possible, end-to-end delay and network loads are reduced, and effective allocation of resources and flexible construction of routing are achieved.

Embodiments of the present disclosure provide a data transmission method, a data link layer, a chip interconnection interface, and an electronic device. The data transmission method is applied to the data link layer of the chip interconnection interface, the data link layer communicates with the system bus and the physical layer, the system bus operates in a first clock domain, and the physical layer operates in a second clock domain or in a second clock domain and a third clock domain. The method includes: the data link layer performs packet processing on the first data received from the system bus to obtain second data, and provides the second data to the physical layer; or, the data link layer performs unpacking processing on the third data received from the physical layer to obtain fourth data, and provides the fourth data to the system bus, wherein the data link layer partially operates in the third clock domain, and the first clock domain is different from the second clock domain and the third clock domain, the first clock domain includes a first clock signal, the second clock domain includes a second clock signal, and the third clock domain includes a third clock signal.

The invention belongs to the technical field of wireless communication, and relates to a system for reducing communication congestion of a wireless communication network. The physical layer adopts an updated frequency hopping sequence to resist interference and is linked with an upper-layer transmission strategy and a topological structure to realize global optimization; link layer resource allocation adopts a dynamic adjustment channel coding mode to adapt to a channel state, so that packet loss caused by blocking of a service is avoided; network layer topology optimization provides real-time spectrum information support, and path planning avoids an interference area. Cross-layer cooperative anti-blocking is performed through dynamic linkage of a physical layer, a link layer and a network layer, limitation of a traditional layered architecture is broken, a'detection-decision-execution 'closed loop is formed, double avoidance of spectrum resources and topological paths is realized, and network anti-blocking capability and transmission efficiency are improved.

The invention discloses a method and a system for verifying the reliability of remotely acquired data of an electric meter box, particularly relates to the technical field of communication and data transmission, and aims to solve the problem that the reliability of the remotely acquired data of the electric meter box is verified without changing an existing netmeter and a communication protocol. The invention aims to solve the problem of how to execute cross-layer reviewable reliability verification and quantitative credibility evaluation on a single reading result remotely acquired by an electric meter box so as to identify and eliminate the abnormity that communication is successful but data is not credible in real time, and support source end positioning. By introducing fusion of a cross-layer evidence set and an active detection mechanism, the credibility of each copying and reading result can be comprehensively evaluated. Multi-level data of a physical layer, a link layer, an application layer and the like are verified, and data exception is identified through active detection. Through the mechanisms, the method can effectively eliminate reading results which succeed in communication but have errors in actual data, thereby ensuring that the collected data are more reliable and accurately reflect the actual state of the electric meter.

The invention provides an EtherCAT slave station port identification and topology diagnosis system and method. Comprising a master station access interface module which is used for being in butt joint with an EtherCAT master station protocol stack and establishing a read-write channel for a data link layer register of a slave station controller; the port state acquisition module is used for analyzing to obtain a physical connection indication, a loop opening and closing state and a communication state of each port, and generating a port state record; the state analysis and control module is used for writing a port opening instruction into a data link layer control register when physical connection exists and a loop is closed, and selecting a preset recovery port of the system to execute register writing when all ports of the target slave station are detected to be in a closed state, so as to obtain a port judgment result; and the topology and diagnosis output module is used for establishing a connection relationship between slave stations based on the port judgment result to generate network topology data. According to the application, unified collection and analysis of registers, automatic judgment and recovery of ports, topology reconstruction and standardized diagnosis output can be realized.

The invention discloses a PCIe-based high-speed data transmission method, device and system, the PCIe-based high-speed data transmission method comprises the following steps: pre-determining a master device and a slave device comprising a standard mode and a high-speed mode in a PCIe link, when the master device is in the standard mode, sending a high-speed mode starting request to a data link layer of the master device by a transaction request layer of the master device; the data link layer of the master device judges whether a high-speed mode is supported according to the current link state, and if yes, the data link layer of the master device sends a high-speed mode starting request to the slave device; when the slave device receives the high-speed mode starting request, the data link layer of the slave device judges whether the high-speed mode is supported or not according to the current link state of the slave device, and if yes, the data link layer of the slave device returns a first agreement signal to the master device; the master device initiates a high speed mode in response to receiving the first agreement signal. According to the invention, high-speed data transmission can be carried out more reasonably and efficiently.

The invention discloses a communication method and system of a wireless ad hoc network, and relates to the technical field of wireless ad hoc networks. The method is applied to a data link layer of the wireless ad hoc network, the wireless ad hoc network comprises a plurality of nodes, each node communicates according to a time frame period, each node comprises an interception mode and a sending mode, and the method comprises the following steps: in the current time frame period, each node executes the following steps: receiving data in the interception mode, and sending the received data in the sending mode; updating a node neighbor table based on the received data; judging whether data sending time is up or not according to the information of each neighbor node in the node neighbor table; and switching to the sending mode to send the data under the condition of determining that the data sending time is up, and switching to the interception mode after the data is successfully sent. The whole wireless ad hoc network does not need complex interactive protocols such as time slot distribution, time slot recovery and the like, so that the decentralized wireless ad hoc network in a real sense is realized.

Certain aspects of the present disclosure provide techniques for wireless communication by a user equipment (UE). For example, the UE may transmit, to a plurality of transmission and reception points (TRPs), a layer parameter based on a maximum number of multiple input multiple output (MIMO) uplink layers that are supported by the UE for uplink communication to the plurality of TRPs. The UE may receive, from at least one TRP of the plurality of TRPs, uplink scheduling information responsive to transmitting the layer parameter. The UE may further transmit, to each of the plurality of TRPs, a physical uplink shared channel (PUSCH) communication according to the uplink scheduling information.

The invention provides an optimized kernel network and an implementation method thereof, and relates to the technical field of kernel networks, the kernel network comprises a fast data channel component XDP arranged on a data link layer; when the network card equipment receives a message data packet, the XDP analyzes and filters the received data packet, or encapsulates or de-encapsulates the received data packet, and modifies a field to forward the data packet; and the XDP matches and filters the received data packet with the rules in the BPF Maps, and discards the data packet when the data packet is illegal. The method comprises the steps that hardware initialization comprises the step of adding a zero copy processing flow when an NAPI polling point processing function is added; the application program configures an XDP socket; the xsk unit executes a BPF instruction, calls a network card driving unit to configure an XSK cache pool, and establishes a DMA mapping relationship between the device and the UMEM shared cache; and the network card drives zero-copy receiving and receiving of the data packet. According to the invention, the kernel network communication efficiency is improved.

A network controller and operating method of the network controller are disclosed. The network controller includes, based on error information transmitted through a plurality of data link layers and a plurality of physical layers respectively corresponding to a plurality of ports managed by one transaction layer, a port monitor circuit configured to determine a number of valid ports among the plurality of ports by monitoring a status of the plurality of ports, a split circuit configured to split and transmit one packet to the valid ports based on the number of valid ports, and a reorder buffer configured to sort an order of second split packets, which are received from another network controller through the plurality of ports, and restore the second split packets received.

This disclosure relates to method, device, and system for data transmission between network nodes of a network. The method may include receiving, by a processing node, a Link Layer Discovery Protocol (LLDP) frame from each network node of the plurality of network nodes. The method may further include extracting, by the processing node, information related to each interface and port available in the plurality of network nodes from the LLDP frame. The method may further include transmitting, by the processing node, the information in a single data packet to an Access Point (AP) node of the distributed network.

The invention provides a universal serial bus (USB) 2.0 host speed reduction bridge based on bidirectional protocol handshake and a prototype verification or hardware simulation acceleration platform, which are characterized in that a slow-speed side module runs at a slow clock frequency, is responsible for realizing a protocol layer of a USB protocol and a physical link layer function of the USB protocol, and communicates with a USB2.0 host controller in a chip design (DUT) to be tested; the original speed side module works under the original clock frequency, logic of a protocol layer of a USB protocol and a physical link layer of the USB protocol is achieved, communication with an external real USB2.0 slave end device is achieved through a USB2.0 PHY, data caching and synchronization are achieved through a data caching RAM, and the bridge control module overall plans the whole situation and accurately regulates and controls independent handshake of the USB2.0 protocol layers on the two sides under the original clock frequency. Through bidirectional protocol handshake on the two sides of the speed reduction bridge, data communication between a low-speed to-be-tested chip design (DUT) in a chip prototype verification platform and external standard-speed real USB slave equipment is achieved through the speed reduction bridge.

The invention provides an unmanned aerial vehicle network routing method based on candidate route pre-calculation and dynamic preferential selection, which comprises the following steps that: a network layer executes topology perception and route pre-calculation to generate a candidate route set; the link layer implements a real-time signal-to-noise ratio monitoring mechanism to generate link quality evaluation parameters; based on a dynamic preferential decision model, selecting an optimal next hop node from the candidate routing set; and the data stream is forwarded to the selected optimal next hop node through cross-layer collaboration. According to the method, a cross-layer cooperation mechanism is added in a table-driven routing protocol, a traditional routing decision is divided into network layer pre-calculation and link layer dynamic optimization selection, a candidate routing set is constructed in a network layer, and the link layer selects an optimal next hop by sensing channel quality parameters, so that dynamic optimization and interference avoidance of a routing path are realized; and the packet delivery rate and throughput performance of the unmanned aerial vehicle network are effectively improved.

The invention relates to the technical field of 5G communication modules, in particular to a data encryption system based on a 5G communication module and a method thereof.The data encryption system comprises a terminal device module, a power private network eSIM, an X.509 digital certificate issued by a CA and a private key are pre-installed in a terminal device and stored in a trusted execution environment or a trusted platform module, firmware integrity verification can be completed after power-on, and the terminal device module is connected with the terminal device module. TLS bidirectional handshake with an identity authentication gateway is initiated through the eSIM and the digital certificate so as to establish an encryption channel with a session identifier; and the identity authentication gateway is used for receiving and verifying eSIM authentication information and an equipment certificate from the terminal equipment, and generating a unique session identifier after finishing TLS bidirectional authentication. In the invention, through combining the eSIM network authentication of the electric power private network and the X.509 certificate issued by the CA, TLS bidirectional handshake between the equipment and the identity gateway is realized, and dual authentication between a physical link layer and an application link layer is realized; and risks of equipment counterfeiting, malicious man-in-the-middle access and the like are completely eradicated.

The invention relates to the technical field of integrated circuits, and discloses a data transmission method and device for interconnection between core particles, the core particles and a processing system.The method is applied to a first core particle and comprises the steps that a protocol layer of the first core particle receives to-be-transmitted data sent by a processor of the first core particle; a protocol layer carries out protocol layer overall packing on data to be transmitted to obtain a protocol layer packet, the protocol layer packet comprises a packet header field and a load area, the packet header field is used for identifying a channel type and a channel signal field of the load area, the channel type comprises at least one monitoring channel used for monitoring cache consistency between core particles, and the monitoring channel is used for monitoring cache consistency between the core particles. The packet header field is used for identifying a channel type and a channel signal field of the load area; and the protocol layer sends the to-be-transmitted data to the second core grain through the link layer and the physical layer of the first core grain based on the protocol layer packet. The problem of cache access consistency of processors among core particles is effectively solved.