6 results about "Single hop" patented technology

The application discloses a heterogeneous data chain interconnection and intercommunication method based on unified identification and multi-layer address mapping, which comprises the following steps: giving each network device a unified IP communication address based on a network layer, and each network device address HA only needs to establish a mapping with the IP to realize heterogeneous identification at the address layer; adding an ARP module in the network layer in a homogeneous data chain, directly establishing an ARP cache table by using a broadcast form existing in a wireless network and network perception information propagated in a single hop in the network; identifying different network areas by using an Area IP, and separating the network into multiple subnets; taking cross-area Area IP self-switching as a benchmark, realizing self-entry into a new subnet and establishing a connection with nodes in the new subnet, and keeping a communication connection during a node area changing process based on a home agent. The application can stably and reliably realize the interconnection and intercommunication of heterogeneous data chains.

The invention discloses a heterogeneous multimode multi-hop covert communication method based on cooperation of single-hop opportunistic interference and an intelligent reflecting surface. The method comprises the following steps: establishing a covert communication system model; for each candidate single hop, dynamically controlling the on / off of a jammer according to a set interference threshold and an instantaneous channel state; in a single hop of starting interference, a reflection signal and a direct signal are superposed in the same phase at a receiving end through intelligent reflection surface phase matching, so that the receiving signal power is maximized; transmitting and interference power are jointly optimized, and the single-hop throughput is maximized under the condition that the concealment constraint is met; screening available single hops meeting the concealment requirement in the network and communication modes of the available single hops, and selecting the optimal mode of each single hop; and constructing a directed graph based on the available single hops, and selecting an end-to-end transmission path which enables the minimum throughput of the path to be maximum by taking the throughput of the single hops as an edge weight. According to the invention, the overall optimization of end-to-end throughput performance and low detectability is realized.

This invention discloses a heterogeneous multimode multi-hop covert communication method based on single-hop opportunistic jamming and intelligent reflector collaboration, comprising the following steps: establishing a covert communication system model; for each candidate single hop, dynamically controlling the activation and deactivation of the jammer according to a set jamming threshold and instantaneous channel state; in the single hop with jamming enabled, using intelligent reflector phase matching to ensure that the reflected signal and the direct signal are superimposed in phase at the receiving end to maximize the received signal power; jointly optimizing the transmission and jamming power to maximize single-hop throughput while satisfying the covertness constraint; screening available single hops and their communication modes that meet the covertness requirements in the network, and selecting the optimal mode for each single hop; constructing a directed graph based on available single hops, using single-hop throughput as the edge weight, and selecting the end-to-end transmission path that maximizes the throughput while minimizing the path length. This invention achieves overall optimization of end-to-end throughput performance and low detectability.

A network virtualization device receives a storage request from a compute instance executed by a host machine separate from the network virtualization device, the storage request comprising data to be stored. Responsive to receiving the storage request, the network virtualization device divides the data to be stored into a set of one or more data stripes. For a first data stripe in the set of data stripes, the network virtualization device determines, from a plurality of extent servers, a first extent server to which the first data stripe is to be sent for storing the first data stripe, transmits the first data stripe to the first extent server, wherein the first extent server stores the first data stipe to a first physical storage device, and receives, from the first extent server, an acknowledgement confirming that the first data stripe was stored.

The application discloses a satellite hybrid hop-beam allocation method and device and a storage medium, and relates to the technical field of satellite communication. The method comprises the following steps: determining a regular beam and a wandering beam corresponding to a target cluster in a current hop-beam period; defining a wave position allocation variable and a power allocation variable corresponding to the wave position of different hop-beam time slots of the wandering beam in the current hop-beam period; defining a chromosome vector according to the wave position allocation variable and the power allocation variable, and initializing the chromosome vector to obtain a chromosome population; constructing a fitness function; iteratively optimizing the chromosome population by using a genetic algorithm to determine an optimal chromosome vector; and determining an optimal joint allocation mode of the wave position and the power of the wandering beam of the target cluster in the current hop-beam period according to the optimal chromosome vector. Thus, the application realizes time slot-beam-power three-dimensional cooperative joint allocation of the target cluster in a single hop-beam period under a low-orbit satellite hybrid hop-beam architecture.

The invention is particularly directed to a signal quality determining device (300) comprising a transceiver unit configured to provide a wireless beacon request signal as an indication request to any wireless communication device (312.1, 312.2, 340) within a single hop distance of the signal quality determining device and belonging or not belonging to a wireless communication network 350 to which the signal quality determining device belongs, to provide a corresponding beacon response signal upon reception of the beacon request signal, and to receive the beacon response signal. The signal quality determining device is configured to determine a beacon signal quality data (SQ) indicative of a received signal quality, e.g. a RSSI of the beacon response signal, or a channel state CSI of the corresponding wireless communication link. The signal quality determining device is adapted to reduce the complexity of a radio frequency based presence or motion sensing functionality.