8 results about "Dynamic spectrum management" patented technology

In a dynamic spectrum management apparatus, system, method, and computer program product first and second priority level secondary users dynamically use spectrum resources of a primary user. For second priority level secondary users, processing circuitry is configured to, based on blockchain, obtain a spectrum coordination request, acknowledged by a spectrum management apparatus, of another second priority level secondary user serving as a requester for the spectrum resources, wherein the blockchain at least comprises each second priority level secondary user, who is using or requests the use of the spectrum resources, serving as a node, and the spectrum coordination request indicates that the requester makes a request for the second priority level secondary user, who is using the spectrum resources, to perform coordination to provide an interference margin for the requester; and execute a first smart contract on the blockchain, so as to determine content of coordination to be performed.

A system and method for dynamic spectrum management are disclosed. An information processing system registers a communication device for operation in a shared frequency range. The system performs a frequency grant procedure for the communication device by accessing a database that records interference power values for a defined frequency management region. To protect a first, primary system, the system acquires the active operation area information of the first system and the coverage area information of the registered communication device. The system then determines whether to permit radio wave emission by the communication device based on a comparison between the operation area information and the coverage area information. Radio wave emission may be denied if the communication device's coverage area overlaps with the first system's active operation area, thereby preventing harmful interference.

The invention provides a wireless communication system for dynamic spectrum management, and the system comprises an IQ modulator which modulates a baseband signal to a first optical carrier; the first tunable carrier generation device is used for generating a tunable first tunable optical carrier based on the first optical carrier; the photon wireless conversion device is used for converting a beam-combined signal of the first tunable optical carrier and the modulated baseband signal to obtain a transmitting signal; the wireless photon conversion device is used for converting the transmitting signal and a second optical carrier to obtain a second optical signal; the second tunable carrier generation device is used for generating a tunable second tunable optical carrier based on the second optical carrier; the IQ demodulator is used for performing coherent mixing and photoelectric detection on the beam-combined signal of the second optical signal and the second tunable optical carrier to obtain a baseband signal; and the first tunable carrier generation device and the second tunable carrier generation device are integrated with hot electrodes. According to the invention, the radio frequency signal can be flexibly adjusted in a wide-spectrum manner, thereby realizing dynamic spectrum management.

For digital subscriber lines, the entire system needs to deal with the crosstalk problem of adjacent cable pairs in the same cable bundle. The present disclosure provides a mechanism for dynamic spectrum management to reduce crosstalk between subscriber lines by reducing the unnecessary power spectral density on some subscriber lines to optimize the overall performance of many subscriber lines. The decision of this reduction (or power back-off) is generally based on the loop distance between the central office and the customer equipment. The shorter the loop distance, the lower the power. However, this does not take into account the quality of each subscriber line, i.e., its background noise and external interference. The transceivers can receive this information, such as background noise and external interference. The negotiation procedure includes this information to adjust the power reduction so that the reduction does not degrade the potential best performance of these subscriber lines.

The invention discloses a near field ad hoc network communication and cooperative control method for an intelligent safety helmet and operation equipment based on an open source gap. The method comprises the following steps: realizing automatic discovery of equipment through a distributed soft bus; generating a device fingerprint based on hardware features in the trusted execution environment, completing bidirectional authentication and security key negotiation, and establishing a secure ad hoc network; dynamic spectrum management and self-adaptive power control are carried out through cooperative sensing, and an intelligent multi-path routing algorithm is operated to maintain an optimal data transmission path; the intelligent safety helmets serve as control nodes, the states of all the devices are synchronized in real time through distributed data management, cooperative control instructions are generated according to task blueprints and real-time working conditions, and cooperative operation and emergency linkage between the devices are achieved through path distribution. According to the invention, the problems of weak safety, poor anti-interference performance, coordination delay and the like of a traditional scheme in a complex mobile environment are solved, and high-safety, high-reliability and self-adaptive near-field coordination control is realized.

The invention relates to the technical field of interference positioning, in particular to a radio station interference source positioning method based on an antenna array, which comprises the following steps of: recording a space coordinate position sequence of a mobile platform corresponding to each sampling moment, and forming a space-time sampling signal synchronous with the space position sequence; according to the space coordinate position sequence and the space-time sampling signal, delay and phase compensation are carried out on signals of all subsequent sampling points, and a reconstruction signal equivalent to an ultra-large aperture virtual array is generated; performing spatial spectrum estimation on the reconstructed signal, and calculating a direction-of-arrival angle; and resolving and outputting the absolute geographic position coordinates of the target interference source through a single-station direction-finding cross positioning method. According to the method, the complexity of multi-platform synchronization is avoided, the method is a practical technical breakthrough aiming at the rapid positioning requirement of a short-time interference source, and the method is particularly suitable for emergency monitoring and dynamic spectrum management and control scenes.

The invention discloses a low-loss filtering transmission-type reconfigurable intelligent surface, and aims to solve the problems that an existing filtering reconfigurable intelligent surface is insufficient in frequency selectivity, high in insertion loss, narrow in beam coverage range and difficult in collaborative design of transmission and regulation. The structure adopts a six-layer metal laminated framework, a receiving layer adopts a symmetrical H-shaped patch and is embedded with a PIN diode to realize 1-bit phase modulation, a regulation and control layer and a transmitting layer cooperatively introduce double transmission zeros through an E-shaped open circuit branch knot, a symmetrical slot and a parasitic branch knot, and low-loss and high-selectivity filtering is realized by combining multi-physical field optimization. The working frequency band is 6.23-7.38 GHz, the 3dB relative bandwidth reaches 17%, the minimum transmission loss in a passband is-0.25 dB, the phase regulation error is smaller than + / -5 degrees, + / -70-degree wide-angle-domain dual-beam scanning is supported, and the out-of-band suppression depth breaks through-40 dB. The method integrates the functions of filtering, low loss, wide-angle beam forming and the like, is suitable for scenes of dynamic spectrum management, anti-interference transmission and the like in a 6G intelligent communication system, and has a wide application prospect.

Technologies for dynamic spectrum management in a cellular network are described. One method include receiving a plurality of requests from one or more user equipment (UE); determining a quality of service (QoS) metric associated with a first request of the plurality of requests; retrieving a plurality of spectrum parameters associated with spectrum of the cellular network; determining one or more spectrum bands for the first request according to the QoS metric and the plurality of spectrum parameters; and allocating the one or more spectrum bands responding to the first request to a corresponding UE of the one or more UE.