17 results about "Link margin" patented technology

The invention relates to a satellite link dynamic regulation and control device and method. The device comprises an upper-layer strategy scheduler, a middle-layer predictor and a lower-layer real-time controller. And the upper-layer strategy scheduler obtains a link state prediction result output by the middle-layer predictor and a current link state reported by the lower-layer real-time controller, selects an initial strategy, a dynamic regulation and control strategy or a conventional communication recovery strategy according to task requirements, and issues a link parameter configuration instruction. And a middle-layer predictor performs link state prediction by using a pre-trained random forest model based on an input feature set extracted in a historical sliding window. And the lower-layer real-time controller executes transmission power and modulation coding scheme adjustment according to the instruction, executes emergency regulation and control when the link margin is abnormal, and gradually adjusts to a conventional communication mode after the link is recovered. According to the invention, dynamic prediction and rapid adaptive regulation and control of the satellite link can be realized.

The present disclosure provides techniques for physical layer (PHY) parameter recommendation for improved link quality. An access point (AP) receives a recommendation request frame from a station (STA), the recommendation request frame comprising at least one of: one or more physical layer (PHY) parameters of the STA, a link margin of the STA, or one or more acceptable link degradation limits of the STA. The AP determines, based on the recommendation request frame, a recommended range for at least one of the PHY parameters, the recommended range being determined to maintain link performance within the acceptable link degradation limits. The AP transmits a recommendation response frame to the STA, the recommendation response frame comprising the recommended range, where the STA adjusts at least one PHY parameter based on the recommended range.

In various embodiments, the present disclosure includes a system for sending 50 gigabits per second (Gbps), 75 Gbps, and 100 Gbps at 50 gigabaud (GBaud) for passive optical networks (PON) downstream and upstream. The system allows for transmission of three data rates at a single baud-rate while only using 2-bits of information per sample. A motivation for sending three data rates at a single baud-rate is to allow for further granularity in the control of the data-rates for downstream and upstream traffic in a flexible PON system based on the link margin. For example, the system can use non-return-to-zero (NRZ) at 50 GBaud for 50 Gbps and can use four-level pulse-amplitude modulation (PAM-4) at 50 GBaud for 100 Gbps. In addition for 75 Gbps, a double square-8 (DSQ-8) constellation can be used at 50 GBaud.

This invention relates to the field of electronic digital data processing and digital information transmission technology, specifically to a cloud-based intelligent data processing system for multiple nodes. The system includes a data preprocessing unit, a topology-aware scheduling engine, a graph neural network device, and a task execution unit. The data preprocessing unit extracts the temporal dependencies and logical associations of the input data stream to generate a directed acyclic graph (DAG). The topology-aware scheduling engine maps the graph to the physical network topology and calculates link bandwidth margin and congestion status. The graph neural network device jointly encodes node computational load and edge link status to output a task allocation strategy. The task execution unit schedules strongly dependent tasks to adjacent nodes with sufficient link margin and idle computing power according to the strategy, and dynamically migrates tasks to alternative path nodes based on link packet loss rate during execution. This invention reduces data transmission latency across switches in multi-node cascading and avoids node computing power idleness caused by local link congestion.

The application relates to a satellite link dynamic regulation device and method, which comprises an upper layer policy scheduler, a middle layer predictor and a lower layer real-time controller. The upper layer policy scheduler acquires a link state prediction result output by the middle layer predictor and a current link state reported by the lower layer real-time controller, selects an initial strategy, a dynamic regulation strategy or a recovery normal communication strategy according to a task demand, and issues a link parameter configuration instruction. The middle layer predictor uses a pre-trained random forest model to perform link state prediction based on an input feature set extracted in a historical sliding window. The lower layer real-time controller executes transmission power and modulation and coding scheme adjustment according to the instruction, performs emergency regulation when link margin abnormality occurs, and gradually adjusts to a normal communication mode after link recovery. Through the application, dynamic prediction and rapid self-adaptive regulation of a satellite link can be realized.

The present invention provides a method for accurately modeling and calculating frequency interference between satellite communication systems. According to the key information parameters of the satellite communication system in the disturbed link, the margin of the disturbed link in a clear sky environment is calculated; based on the margin of the disturbed link, the protection limit of desynchronized lumped interference, the protection limit of long-term lumped interference, and the protection limit of short-term lumped interference are calculated; and the probability distribution function of the interference signal power affected by rainfall is calculated; then, the complementary cumulative probability distribution function of the interference signal power is respectively compared with the protection limits to determine whether the disturbed link is subject to harmful interference based on the comparison results. The present invention also provides an apparatus for accurately modeling and calculating frequency interference between satellite communication systems. Thus, the present invention can effectively evaluate the impacts of desynchronization, long-term, and short-term interference and accurately predict the probability distribution of interference signals.

The data flow design method for flexible information processing of remote sensing constellations belongs to the field of spacecraft system overall design technology. This method first calculates the data rate of different types of data content, including: (1) calculating the original image data rate based on detector size, quantity, and imaging frame rate; (2) calculating the small area windowing data rate based on window size and windowing data frame rate; (3) calculating the target point's adjacent area slice data rate based on threshold crossing rate; and (4) calculating the target trajectory information data rate based on single target trajectory information and target quantity. Then, the data transmission content is flexibly configured, and information overlap strategies at different levels are formulated. This enables dual-satellite information fusion for target positioning and tracking tasks under different link transmission capacity constraints. For randomly triggered multi-target tracking tasks, the data transmission content is adaptively adjusted according to link margin, enabling dual-satellite positioning and tracking under different levels of information fusion processing conditions.

In order to solve the problems in the prior art, the application provides a FSO adaptive routing method based on deep reinforcement learning, comprising the following steps: building an undirected weighted topology graph according to the connection relationship of FSO network nodes, and constructing an FSO network environment as an environment of deep reinforcement learning according to the atmospheric environment of the current FSO network; a proxy of deep reinforcement learning obtains data samples through interaction with the environment, and continuously saves the data samples into an experience replay pool; when the storage data of the experience replay pool reaches a maximum storage number, the data samples are randomly extracted from the experience replay pool to train an evaluation network in the proxy, and through repeated training, a state is learned to maximize the cumulative reward, so that the FSO adaptive routing is realized; the number of hops, the node energy and the link margin of the network are comprehensively considered, the reliability of network data transmission is improved, and the energy consumption during routing is reduced.

The application provides a UCIe-based flow control method, an artificial intelligence chip and a storage medium. The UCIe-based flow control method is suitable for a first core particle and a second core particle. The first core particle communicates with the second core particle. The first core particle comprises a receiving end data buffer. The UCIe-based flow control method comprises the following steps: reading, by the first core particle, an initial reserved link margin corresponding to the receiving end data buffer; reading, by the first core particle, a plurality of register configuration values and a plurality of reserved depths corresponding to the receiving end data buffer; obtaining, by the first core particle, a remaining available depth of the receiving end data buffer; and comparing, by the first core particle, the remaining available depth of the receiving end data buffer with the plurality of register configuration values to determine whether to select one of the plurality of reserved depths to calculate a current credit value.

The invention relates to a comprehensive optimization layout design and rapid verification method for a spacecraft antenna, and aims to solve the problems that in traditional spacecraft development, in order to verify the performance and layout rationality of various antennas, a whole device electromagnetic compatibility special test needs to be organized and implemented, so that the model development period is prolonged, and the test expenditure is high. The method provided by the invention comprises the following steps: [S1] carrying out frequency domain electromagnetic compatibility analysis according to the working frequency of a radio frequency single machine on a spacecraft, and finding out a potential interference frequency; (S2) carrying out isolation analysis among the antennas to obtain an isolation matrix among all transmitting and receiving antennas, and optimizing the antenna layout based on the matrix; (S3) carrying out directional diagram simulation on the antenna with obvious shielding in the beam view field; and (S4) calculating the link margin of the communication system according to the shielding directional diagram simulation result in combination with the on-orbit task attitude of the spacecraft, and if the task requirement is not met, carrying out iterative optimization adjustment on the antenna position and the installation angle until the radiation characteristic of the adjusted antenna meets the requirement.

The invention provides a UCIe-based flow control method, an artificial intelligence chip and a storage medium. The UCIe-based flow control method is suitable for the first core particle and the second core particle. The first core particle is in communication with the second core particle. The first core particle comprises a receiving end data buffer. The UCIe-based flow control method comprises the following steps: reading an initial reserved link margin corresponding to a receiving end data buffer through a first core grain; reading a plurality of register configuration values and a plurality of reserved depths corresponding to the receiving end data buffer through the first core grain; obtaining the residual available depth of the data buffer of the receiving end through the first core particle; and comparing the remaining available depth of the receiving end data buffer with the plurality of register configuration values through the first core grain to determine whether to select one of the plurality of reserved depths to calculate the current credit value.

The application relates to a free space optical communication link simulation analysis method and an interface system, and relates to the technical field of optical communication. In order to solve the problems in the prior art, the free space optical communication link simulation analysis method comprises the following steps: determining a link type, determining a transceiving terminal, configuring a transceiving terminal parameter, configuring a link parameter, calculating a transceiving terminal gain, calculating a pointing loss, calculating a channel transmission loss, calculating a link margin, and displaying a calculation result. A model covers deep space, near earth and inter-satellite link scenes, and link performance is quantitatively evaluated through a formula. The free space optical communication link simulation interface system comprises the following modules: link selection, data input, link budget, visual analysis and output, supports parameter configuration, real-time calculation and chart display, and can generate a standardized report. The scheme solves the problems of insufficient parameter coverage and poor interactivity of a traditional method, realizes the integration of "configuration-calculation-analysis", and improves link design optimization efficiency and user experience.

The invention discloses a free space optical communication link simulation analysis method and an interface system, relates to the technical field of optical communication, and aims to solve the problems in the prior art. A free space optical communication link simulation analysis method comprises the following steps: determining a link type, determining a receiving and transmitting terminal, configuring parameters of the receiving and transmitting terminal, configuring link parameters, calculating gain of the receiving and transmitting terminal, calculating directional loss, calculating channel transmission loss, calculating link allowance and displaying a calculation result, and covering deep space, near ground and inter-satellite link scenes by a model. And quantitatively evaluating the link performance through a formula. The free space optical communication link simulation interface system comprises the following modules: link type selection, data input, link budgeting, visual analysis and output, support parameter configuration, real-time calculation and chart display, and standardized report generation. According to the scheme, the problems of insufficient parameter coverage and poor interactivity of a traditional method are solved, configuration-calculation-analysis integration is realized, and the link design optimization efficiency and the user experience are improved.

The present disclosure provides techniques for physical layer (PHY) parameter recommendation for improved link quality. An access point (AP) receives a recommendation request frame from a station (STA), the recommendation request frame comprising at least one of: one or more physical layer (PHY) parameters of the STA, a link margin of the STA, or one or more acceptable link degradation limits of the STA. The AP determines, based on the recommendation request frame, a recommended range for at least one of the PHY parameters, the recommended range being determined to maintain link performance within the acceptable link degradation limits. The AP transmits a recommendation response frame to the STA, the recommendation response frame comprising the recommended range, where the STA adjusts at least one PHY parameter based on the recommended range.

The invention discloses an access method and device and electronic equipment, and the method comprises the steps: a terminal obtains a link carrier-to-noise ratio between the terminal and target satellites, then calculates a threshold carrier-to-noise ratio of each target satellite, calculates N link margins according to the link carrier-to-noise ratio and each threshold carrier-to-noise ratio, and sends the N link margins to the terminal; the link margin represents the quality of the communication link between the terminal and the target satellite, so that the maximum link margin is determined in the N link margins, and the target satellite corresponding to the maximum link margin is accessed. According to the method, the link characteristics between the terminal and the satellite are combined, and the target satellite with the highest link quality is selected for access, so that the accuracy of accessing the satellite by the terminal is ensured.

In various embodiments, the present disclosure includes a system for sending 50 gigabits per second (Gbps), 75 Gbps, and 100 Gbps at 50 gigabaud (GBaud) for passive optical networks (PON) downstream and upstream. The system allows for transmission of three data rates at a single baud-rate while only using 2-bits of information per sample. A motivation for sending three data rates at a single baud-rate is to allow for further granularity in the control of the data-rates for downstream and upstream traffic in a flexible PON system based on the link margin. For example, the system can use non-return-to-zero (NRZ) at 50 GBaud for 50 Gbps and can use four-level pulse-amplitude modulation (PAM-4) at 50 GBaud for 100 Gbps. In addition for 75 Gbps, a double square-8 (DSQ-8) constellation can be used at 50 GBaud.

Techniques for selecting frequencies of operation are described. HF signals may land at the receiver node with power levels dependent upon the transmit frequency. The frequency with the highest power level at the receiver node may be selected when the receiver node is not subject to interference. The receiver node may be unable to receive a desired signal if an interfering signal has a signal level which is higher than the desired signal. The interfering signals may have a signal level which is higher across all available frequencies. The transmitter node may determine a potential relay table with a communication link between the transmitter node and a relay node and a communication link between the relay node and the receiver node. The communication link may include link margins above the interfering signal, ensuring the links may be established. The nodes may then communicate even when subject to interference.