6 results about "Symmetric network" patented technology

Two electronic devices attempt to communicate and exchange Internet Protocol (IP) packets over a cellular communication network, and at least one of the two devices is behind a symmetric Network Address Translation (NAT) service. At least one of the two devices executes a Session Traversal Utilities for NAT (STUN) protocol, which provides to that device a pair of external IP address and port of that device; which that device then informs to a Message Broker Unit that is accessible to both devices via the public Internet. The Message Broker Unit provides the external IP address and port of that device, to the other device; which then connects to a Virtual Private Network (VPN) server and sends to the first device one or more User Datagram Protocol (UDP) packets that penetrate or puncture the NAT service in an application-agnostic manner.

The embodiment of the present application discloses a DNA coding method and device with biological constraints. In the method, a progressive staged training strategy is adopted, the first stage is trained to minimize the distortion of the original source and the reconstructed source, and through the collaborative design of the centralized coding, the symmetrical quantization threshold and the symmetrical network structure, the compression sequence naturally satisfies the ideal GC content when represented as the ATCG base sequence. In the second stage, the loss function of the biological constraint is added to maintain low distortion while making the base sequence satisfy the biological base arrangement characteristics. The present application naturally represents the floating point sequence as the biological base sequence through the structural design, the base distribution has uniformity, and has good distortion performance, improves the efficiency of DNA data storage, and reduces the error rate.

A balun circuit addresses the bandwidth issue by using symmetric amplitude division and phase delay networks to convert single-ended signals to differential signals. Because the balun circuit's balance characteristics are guaranteed over a very wide bandwidth, other performance characteristics that can limit the operating bandwidth, such as impedance matching and insertion loss, can be carefully addressed without concern for amplitude and phase balance. A balun circuit splits a single-ended signal into four differential paths through symmetric networks and applies phase inversion by inverting the polarity of each differential path, thereby reducing the complexity, size, and loss of the balun circuit's overall configuration.

Techniques described herein can detect sites at which symmetric network address translation (NAT) is employed and can manage network traffic to support data connections to devices at the detected symmetric NAT sites. During a detection stage, multiple network connections can be established with computing devices at a site. IP addresses and port addresses associated with the multiple network connections can be compared in order to detect the use of symmetric NAT. During a policy enforcement stage, sites that employ symmetric NAT can be added to a site list. A control policy can direct traffic for sites on the site list to one or more hubs configured to manage data connections on behalf of devices at symmetric NAT sites.

The embodiment of the invention provides a self-adaptive time synchronization method, device and equipment for a wireless brain-computer interface system, and the method takes linear clock drift, symmetric network time delay and time delay stability as assumptions, and comprises the steps: transmitting a time synchronization request instruction to second equipment, calculating round-trip time consumption, and screening based on a preset time consumption threshold range to obtain a basic time data set; calculating a window mean value and a global mean value through a rolling window, and setting a time-consuming threshold condition for secondary screening to obtain an effective time data set; a linear prediction function is input after reference moment correction, and slope and intercept parameters are updated through a least square method; the updated linear prediction function is used for calculating a second equipment time prediction value, the precision of the time prediction value is evaluated in combination with a confidence interval, a triangular inequality is constructed for verification, time synchronization is completed, network jitter and clock drift are effectively resisted, precision and stability are improved, and a reliable self-adaptive synchronization scheme is provided for a distributed system.

The application provides a method for improving controllability of a symmetric network by time segmentation, and relates to the technical field of network performance optimization. The method adopts a time segmentation method to divide a symmetric network into a symmetric time-varying network composed of multiple snapshots, and realizes the structural controllability of the whole network through the control of each snapshot. Given a symmetric network, the black and white coloring is performed through a breadth-first search algorithm for classification; the maximum matching of edges in the symmetric network is found; the undirected cactus is constructed according to the unmatched nodes and the matched edges; the network graph composed of each undirected cactus is used to construct a snapshot, and the number of snapshots is the same as the number of undirected cacti. When a symmetric network is divided into a symmetric time-varying network composed of multiple snapshots, the time segmentation method can effectively reduce the number of drive nodes in the symmetric network and improve the network controllability.