36results about How to "Increase overhead" patented technology

The invention discloses an invisible object removing method and system based on a GPU, and the method comprises the steps: calculating six plane equations of a view cone of an observation camera and the world coordinates of each observed object, and carrying out the parallel calculation of the front or back of each observed object on a certain plane of the view cone through the GPU, thereby judging whether the object is outside the view cone or not, therefore, all objects outside the view cone are removed. And generating hierarchical Z buffer area data in the GPU through the depth map of the current frame, transmitting information such as the position of the object to the GPU for calculation with the hierarchical Z buffer area data, and removing the completely shielded object. According to the method, the parallel computing capability of the GPU is utilized, the rejection efficiency is improved, the CPU computing burden during rendering is greatly reduced, and the occurrence probability of rejection errors is reduced.

The invention provides a measurement-based quantum calculation method for a physical driving variable component sub-character solicitation solver, and the method comprises the steps: S1, constructing a variational structure according to a Hamiltonian expression of a to-be-solved quantum multi-body system; s2, converting the variational structure into a graph state and a measurement mode corresponding to a measurement type quantum calculation scheme; s3, initializing an input state; s4, according to the designed measurement sequence, performing a series of single particle measurement on the graph state from the input state to obtain the output state of the variable component sub-line; and S5, continuously iteratively optimizing the variational parameters until the ground state energy of the target Hamiltonian is solved. According to the method, a variational structure is constructed from Hamiltonian of a problem to be solved, the advantages of single-particle measurement operation in measurement type quantum calculation are utilized, implementation of a multi-quantum-bit revolving door is simplified by introducing a small number of auxiliary quantum bits, and therefore quantum resource overhead of a quantum circuit is greatly reduced.

The embodiment of the invention discloses a time domain extensible video coding method, system and device and a storage medium. According to the technical scheme provided by the embodiment of the invention, the hierarchical structure of the to-be-coded picture group is determined, the hierarchical structure is provided with a plurality of hierarchies from high to low according to the set hierarchical rule, each hierarchy comprises a corresponding number of image frames, and the image frame of the higher hierarchy takes the image frame of the lower hierarchy as the reference frame; the image frame at the lowest level takes the first frame of the picture group to be coded as a reference frame; under the condition that time domain scalable video coding is triggered, screening out the image frames of at least one highest level in the to-be-coded picture group, and coding the residual image frames in the to-be-coded picture group; and storing the coded image frame in an image cache, and selecting a reference frame of the to-be-coded image frame from the image cache according to the hierarchical structure, so as to code the to-be-coded image frame based on the selected reference frame. By adopting the technical means, the transmission code rate and CPU (Central Processing Unit) overhead of the extensible video coding can be saved.

A terminal according to one aspect of the present disclosure includes: a receiving section that attempts reception of a first synchronization signal block; and a control section that controls, when the reception of the first synchronization signal block has failed, transmission of a preamble by using a random access occasion for report of the failure. According to one aspect of the present disclosure, coverage can be improved by taking account of overhead.

A coding efficiency increase is achieved by using a common signalization within the bitstream with regard to both activation of merging and activation of the skip mode. That is, one of the possible states of one or more syntax elements within the bitstream may signalize for a current sample set of a picture that the respective sample set is to be merged and has no prediction residual encoded and inserted into the bitstream. Alternatively speaking, a common flag may commonly signalize whether the coding parameters associated with a current sample set are to be set according to a merge candidate or to be retrieved from the bitstream, and whether the current sample set of the picture is to be reconstructed merely based on a prediction signal depending on the coding parameters associated with the current sample set, without any residual data, or to be reconstructed by refining the prediction signal depending on the coding parameters associated with the current sample set by means of residual data within the bitstream.

The invention discloses a linear communication complexity consensus method based on a DAG structure, and belongs to the field of computer science and technology. According to the invention, an efficient BFT consensus method is established by optimizing a communication process and introducing a broadcast mode of linear communication complexity. According to the invention, a broadcast mode (VBC) with linear communication complexity is introduced to replace the traditional reliable broadcast (RBC), so that the communication complexity is greatly reduced, and the efficiency of the system is improved; in addition, the communication complexity is effectively reduced, the system can process more transactions, the throughput of the system is remarkably improved, and the requirement of large-scale application is met; furthermore, a broadcast mode (VBC) with linear communication complexity enables the communication overhead not to be obviously increased when the number of nodes of the system is increased, so that the expandability of the system is improved, and the method is suitable for a larger-scale distributed network; and finally, by combining a distributed hash table and a threshold signature technology, the system can still maintain high-level security and fault tolerance and prevent attack of malicious nodes while the communication complexity is reduced, the throughput of the system can be remarkably improved, the expandability of the BFT consensus system in large-scale application can be realized, and the method is suitable for popularization and application. Therefore, a major breakthrough is brought to the development of a distributed system and a block chain technology.

A method and apparatus for inserting a pseudo sequence during data modulation in a communication system according to a channel state and a link state, etc. are disclosed. In an embodiment, a method for data modulation by a wireless communication node of a wireless communication system includes: inserting at least one first pseudo sequence into a first data sequence in a first data block; and inserting at least one second pseudo sequence into a second data sequence in a second data block; wherein a first length of the first pseudo sequence is different from a second length of the second pseudo sequence, and wherein the second pseudo sequence includes the first pseudo sequence or is included in the first pseudo sequence.

The invention discloses a low-earth-orbit satellite communication network routing method based on reinforcement learning, and relates to the field of low-earth-orbit satellite communication networks in 5G NTN, in particular to the low-earth-orbit satellite communication network routing method based on reinforcement learning. The objective of the invention is to solve the problem that existing reinforcement learning Q-Learning applications are mostly focused on a ground network, and the unique dynamic topology and three-dimensional space routing problems of a satellite network are not solved. The invention provides a lightweight and adaptive low earth orbit satellite communication network routing optimization method based on reinforcement learning. The method is realized through distributed Q-Learning: dynamically adapting to topological change, dynamically adapting to three-dimensional space routing, balancing link load, minimizing end-to-end delay, and reducing on-satellite computing overhead.

The invention aims to solve the problem that the password used by a person is too many at present. Firstly, a scheme for managing all passwords in a centralized mode without passwords is provided for an individual user. Different from an existing scheme, a'local 'concept is introduced and is combined with human body biological feature recognition for use, the contradiction between safety and convenience of password centralized management is solved, and the highest level allowed by the prior art is achieved in the two aspects. Wherein the security is all-around, not only is the reliability of user identity authentication achieved, but also the strict requirement that implementation personnel cannot obtain confidential information of the user is met, and it is ensured that the user can reconstruct the local machine after the terminal equipment used as the local machine is lost / damaged; it continues to manage its personal confidential information in a highly secure and highly convenient manner. The user identity authentication service in the scheme can be shared by other internet applications, and has the advantages of replacing passwords, eliminating risks generated due to the fact that the internet applications respectively collect the biological characteristic information of the user and the like.

The invention provides a sidecar mode communication method and communication system based on a divide-and-conquer idea, and belongs to the technical field of communication. The method is applied to communication between equipment hosts, the equipment hosts comprise a first equipment host and a second equipment host which communicate with each other, and the first equipment host and the second equipment host are respectively provided with main service processes which are independent from each other and a message bus service process used for communicating with an external equipment host. The main business process is communicated with the message bus service process in a side vehicle mode, the main business process is used for processing various applications of equipment, and the message bus service processes of the first equipment host and the second equipment host are communicated with each other through a message bus. The method has the beneficial effects that each machine is self-managed, and peer-to-peer connection between equipment is realized by utilizing deployment of a side vehicle mode and bus service, so that the communication reliability and performance of the equipment are improved.

A coding efficiency increase is achieved by using a common signalization within the bitstream with regard to both activation of merging and activation of the skip mode. That is, one of the possible states of one or more syntax elements within the bitstream may signalize for a current sample set of a picture that the respective sample set is to be merged and has no prediction residual encoded and inserted into the bitstream. Alternatively speaking, a common flag may commonly signalize whether the coding parameters associated with a current sample set are to be set according to a merge candidate or to be retrieved from the bitstream, and whether the current sample set of the picture is to be reconstructed merely based on a prediction signal depending on the coding parameters associated with the current sample set, without any residual data, or to be reconstructed by refining the prediction signal depending on the coding parameters associated with the current sample set by means of residual data within the bitstream.

The invention relates to the technical field of orthogonal time-frequency-space communication systems, in particular to an MIMO-OTFS combined time synchronization and channel estimation method, which comprises the following steps: for a plurality of transmitting antennas, generating a pilot frequency sequence based on a bipolar maximum length sequence; obtaining time delay extension of the channel according to the prior channel information; constructing a time delay-Doppler domain sending signal based on the time delay spread and the pilot frequency sequence, performing OTFS modulation on the time delay-Doppler domain sending signal, and then sending the time delay-Doppler domain sending signal; performing time synchronization detection on the received signal transmitted through the channel based on the bipolar maximum length sequence, and acquiring timing offset based on synchronization time positions of multiple paths; based on the synchronization time position and the timing offset of the plurality of paths, obtaining a time delay tap, a Doppler frequency shift and a channel gain of each path of each transmitting antenna; according to the invention, the pilot frequency overhead can be saved in channel estimation and the accuracy of timing offset estimation can be improved.

The invention discloses a transmission protection circuit of a medical neural network chip, which comprises a read-only memory, a counter, a comparator and a cross exchange module, and is characterized in that the read-only memory is used for storing all input data and all weight data of the medical neural network chip; one input data and one weight data of the medical neural network chip are output to the cross-exchange module every time, and the cross-exchange module is used for directly outputting or crosswise outputting one input data and one weight data output to the cross-exchange module by the read-only memory under the control of the comparator. The counter is used for carrying out real-time statistics on output working turns of the cross-exchange module, and the comparator is used for generating two paths of control signals according to a statistical value of the counter to control whether the counter is reset or not and direct output or cross output of the cross-exchange module; the method has the advantages that data monitoring can be effectively prevented, hardware overhead does not need to be additionally increased at a server side, and only a small amount of hardware needs to be added at an equipment side.

The invention discloses a VSAT-TDMA time delay tracking method based on decoding verification, and belongs to the technical field of satellite communication. According to the method, demodulation and signaling analysis are carried out on a main station receiving signal, a small station frame plan is generated, and a signaling initial time delay estimation value is obtained by comparing burst theoretical occurrence time with actual receiving time; receiving a small station burst signal and completing decoding verification, and reserving a preorder burst signal conforming to a set rule; differential correlation operation is carried out on the effective signal to obtain a correlation peak position, a time delay change trend is obtained through smooth fitting, a subsequent burst initial position is predicted based on the trend, a receiving window is dynamically adjusted, and time delay tracking is completed. Effective samples are screened through decoding verification, time delay extraction accuracy is improved, detection jitter is filtered out, channel time-varying characteristics are adapted, uplink access synchronization stability of the system is guaranteed, the method can be deployed in an existing satellite communication system, and communication reliability is improved.

A star sensor output time synchronization method relates to the technical field of star sensor time synchronization, solves the problem of star sensor output time synchronization, and outputs time information inside a star sensor by using a clock of the star sensor under the condition of no external pulse per second signal and time broadcast information. And if the external pulse per second signal and the time broadcast information are received, the star sensor outputs standard UTC time information, and synchronizes the internal time information to the UTC time information. And if the external pulse per second signal and the time broadcast information are lost, the star sensor is rapidly switched into internal time information and outputs the internal time information. The time information output by the star sensor can be rapidly and reliably switched between the internal time and the UTC time, and the synchronization problem of the time information output by the star sensor is effectively solved. The output time synchronization method of the star sensor has the advantages of reliable synchronization, accurate time keeping and the like, and is suitable for star sensor equipment.

The invention relates to the technical field of digital communication circuits, in particular to a digital communication circuit based on a 4-20mA line. A comparator COMP, a resistance bridge, a resistance-capacitance circuit and a signal amplification circuit are sequentially arranged in an original 4-20 mA two-wire system circuit, so that receiving, picking, voltage stabilization and amplification of step signals containing digital signals in the 4-20 mA two-wire system circuit are achieved, and the purpose of achieving bidirectional digital communication in the existing 4-20 mA two-wire system circuit is achieved. Compared with the prior art, the number of added circuit elements is relatively small, the increased hardware overhead and power loss are small, and through the resistance bridge and the variable resistor, small-step signals can be filtered, so that digital signals can be extracted more accurately according to the application environment; the problem that a current 4-20mA two-wire system circuit transmits a unidirectional analog current signal and does not support transmission of a bidirectional digital communication signal is solved.

The present invention provides a sidecar mode communication method and communication system based on the divide-and-conquer concept, belonging to the field of communication technology. The present invention is applied to communication between device hosts, the device hosts include a first device host and a second device host that communicate with each other, the first device host and the second device host are respectively provided with a main business process that is independent of each other and a message bus service process for communicating with an external device host, the main business process and the message bus service process communicate in a sidecar mode, the main business process is used to process various applications of the device, and the message bus service processes of the first device host and the second device host communicate with each other through the message bus. The beneficial effects of the present invention are: each machine is self-managed, and the deployment and use of bus services in the sidecar mode are utilized to achieve peer-to-peer connection between devices, thereby improving the communication reliability and performance of the devices.

This application discloses a method, apparatus, and medium for implementing secure socket communication within the operating system kernel, belonging to the field of computer systems and network communication technology. This method registers a new secure socket type at the socket layer of the operating system kernel and associates it with a customized set of operation functions. Applications only need to create sockets of this type and inject cryptographic parameters through standard system calls to establish a connection, thereby obtaining transparent, end-to-end automatic encrypted communication capabilities. During transmission, data is encrypted in kernel mode by calling the native crypto subsystem API through a rewritten send function and an authentication tag is attached. During reception, the rewritten receive function automatically performs decryption and integrity verification. This scheme avoids reliance on large external security libraries, improves security and performance, and decentralizes encryption / decryption, resource management, and other processes to the kernel mode, providing upper-layer applications with easy-to-use, lightweight, high-performance, and highly secure kernel-level transparent secure communication.

A terminal according to one aspect of the present disclosure includes a receiving section that receives downlink control information (DCI), and a control section that determines a waveform to be used for a physical downlink shared channel (PUSCH), based on at least one of a modulation and coding scheme (MCS) field, a frequency domain resource assignment field, a precoding information and number of layers field, and an antenna port field of the DCI. According to one aspect of the present disclosure, it is possible to easily perform switching of a waveform.

A terminal according to one aspect of the present disclosure includes: a transmitting section that transmits a message in a random access procedure in a physical uplink shared channel; and a control section that controls a plurality of repetitions of at least one of reception of a downlink channel for scheduling the physical uplink shared channel and transmission of a channel the physical uplink shared channel. According to one aspect of the present disclosure, coverage can be improved by taking account of overhead.

The application provides a privacy protection federated learning method based on a blockchain anti-poisoning attack, and belongs to the technical field of federated learning, privacy protection and blockchain technology. The technical problems of poisoning attack and malicious aggregation in the privacy protection federated learning are solved. The technical scheme comprises the following steps: S10, system global initialization; S20, local model training; S30, malicious participant identification; MO and SM cooperate to determine whether the participant has performed the normalization operation; S40, gradient ciphertext aggregation; S50, participant and MO update model. The application has the beneficial effects that the application protects the privacy of the participant model gradient by using the fully homomorphic encryption algorithm CKKS, identifies the malicious gradient in the gradient ciphertext by using the cosine similarity method, and calculates and verifies the aggregation result by using the consensus mechanism of the blockchain.

The invention provides a message processing method and device for a switch chip, and the method comprises the steps: dividing each module in the switch chip into a plurality of partitions, setting an independent survival time timer for each partition, and enabling the plurality of survival time timers to respond to the same enable signal for synchronous timing; when the ingress port of the switch chip receives a message, recording the ingress time of the message by using the survival time timer of the partition where the ingress port is located, and when the message enters other partitions, obtaining a current timestamp by using the survival time timer of the corresponding partition; determining message survival time according to the current timestamp and the entry time; and if the message survival time exceeds a preset threshold value, discarding the message in a timeout manner. According to the technical scheme, the stability and efficiency of the switching chip and the accuracy of data processing are improved.

This invention discloses a method and device for constructing a cross-island heterogeneous federated learning system based on homomorphic encryption. After local training on the client, the local model is packaged and sparsified at the packet granularity. The sparsed packet data is homomorphically encrypted, and the ciphertext and mask are sent to a parameter server. The parameter server aggregates the data according to the client's ciphertext weights and sends the aggregated ciphertext global model and mask to the client. The client decrypts the global ciphertext and unpacks it to obtain the global model, and updates its local model. The client calculates and returns a sketch of its local model. By clustering the sketch, the fastest client in each cluster is selected as a participant in the next round of training, and the contribution is calculated based on the sketch to obtain the aggregation weights for the next round. The trained local model is then applied to the cross-island heterogeneous federated learning system. This invention can improve the efficiency of homomorphic encryption while protecting privacy, and simultaneously resist the negative impact of lagging on model synchronization.

The invention discloses a space laser communication transceiving system and method with a multi-wavelength self-loop test function, and solves the problem that after a laser communication load is launched into an orbit, rapid on-orbit self-inspection cannot be carried out on optical communication transceiving subsystem devices, modules, circuits and the like in the prior art. By switching the polarization state of the high-speed laser signal and utilizing the principle that the polarization beam splitter group reflects S light and transmits P light, a self-test loopback light path is formed for the emitted multi-band high-speed laser signal, the self-test test of the satellite can be realized before double-satellite link establishment is implemented, the emission light path is not influenced, and the measurement accuracy is improved. According to the method, the on-orbit state of the optical communication transceiving subsystem can be judged through single-byte telemetering data only by switching the laser polarization state, and on-orbit self-inspection testing can be rapidly and effectively completed under the urgent conditions that the transit time of a satellite is short and the number of testing steps is large.

The present invention discloses a hierarchical hybrid time synchronization method applied to a remote simulation system, which is mainly implemented through a three-layer method: the first layer is to build a hardware clock server by installing a clock board in a remote distributed high-real-time simulation system node to receive the clock signal transmitted by the Beidou system. A remote software clock server is built, and the hardware clock server sends a time signal to the remote software clock server through a wide area network. The second layer of the hardware clock server and the software clock server send time signals to the business servers in the system through the local system LAN; the third layer of the business application layer, each business end relies on the wide area network to exchange data based on the synchronized time signal. The time consistency of each simulation node of the remote simulation system is achieved, which solves the problem of inconsistent time and frequency requirements of large-scale remote simulation systems and the inability to meet all system differences in one node, while reducing the construction cost.

The present application provides a network access method and electronic device, and relates to the field of communication technology. The network access method of the present application includes: in response to the user's operation of accessing the network, sending a data activation request to a 5G network device; when receiving the activation failure information returned by the 5G network device, detecting whether the electronic device meets the preset shutdown condition according to the activation failure information; when the shutdown condition is met, turning off the 5G mobile data network mode of the electronic device and determining the shutdown duration of the 5G mobile data network mode of the electronic device according to the fallback duration; accessing the 4G mobile data network within the shutdown duration. By adopting the method in the present application, when the electronic device is rejected for data activation by the 5G network device, the 5G mobile data network mode can be turned off in time, and the 4G mobile data network can be accessed, so as to ensure that the electronic device can access the data network normally and ensure that the user can access the Internet normally through the electronic device.

A terminal according to one aspect of the present disclosure includes: a receiving section that receives at least one synchronization signal block of a first number of first synchronization blocks and a second number of second synchronization signal blocks; and a control section that controls initial access based on the synchronization signal block. According to one aspect of the present disclosure, coverage can be improved by taking account of overhead.

A terminal according to one aspect of the present disclosure includes: a receiving section that attempts to receive a first synchronization block; and a control section that controls reception of a second synchronization signal block, based on a reception result of the first synchronization signal block. According to one aspect of the present disclosure, coverage can be improved by taking account of overhead.

A terminal according to one aspect of the present disclosure includes: a receiving section that receives a synchronization signal block including a first signal and a second signal; and a control section that controls the reception of the synchronization signal block by assuming that a first beam used for the first signal is different from a second beam used for the second signal. According to one aspect of the present disclosure, coverage can be improved by taking account of overhead.