24results about How to "Increase overhead" patented technology

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.

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.

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 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.

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.

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.

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.

A terminal according to one embodiment of the present disclosure includes: a control unit for generating a plurality of channel state information parts, i.e., a plurality of CSI parts, wherein at least one of the plurality of CSI parts includes a first field indicating each of a plurality of precoding matrix indicators, i.e., PMIs, and a second field indicating a delay corresponding to the PMIs; and a transmitting unit for transmitting the plurality of CSI parts. Thus, an increase in UL overhead can be suppressed and a decrease in the reliability of CSI can be prevented.

Provided are a network routing anomaly detection method, system, device and medium, the method comprising: receiving detection result information comprising an actual path code sent by a network device, the actual path code being used for reflecting an actual forwarding path of a detection data packet in a target network; and if the actual path code is different from an expected path code (an expected forwarding path in a normal routing state) of the target detection service flow, respectively carrying out equipment forwarding offset detection, network segment offset detection and loop path detection on the actual forwarding path by utilizing a preset routing anomaly detection mechanism to obtain an anomaly detection result, the anomaly detection result comprises the identifier of the network equipment with the path offset, the information of the network segment with the path offset and whether the actual forwarding path comprises the loop path, so that the source tracing can be carried out on the initial network equipment with the anomaly in the target network based on the anomaly detection result. According to the embodiment of the invention, refined classification and diagnosis of path anomalies can be realized.

The application discloses a virtual RDMA device based on DPDK and a use method thereof. The virtual RDMA device based on DPDK comprises a front-end virtio-rdma device, which is used for receiving an RDMA device operation request initiated by an application program in a virtual machine, encapsulating the request as an instruction conforming to a virtio protocol, and sending the instruction to a back-end vhost-user- rdma device through a vring; and the back-end vhost-user- rdma device is used for simulating the function of a real RDMA network card, the device can acquire and analyze the instruction conforming to the virtio protocol from a circular queue vring, execute corresponding RDMA device operations, and return the operation results to the front-end virtio-rdma device through the vring. The application can get rid of the dependence on the real RDMA device, and can improve the resource utilization, system flexibility and safety.

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 synchronization signal block and a plurality of second synchronization signal blocks; and a control section that controls reception by assuming that the plurality of second synchronization signal blocks are quasi-co-located (QCLed) with the first synchronization signal block. According to one aspect of the present disclosure, coverage can be improved by taking account of overhead.