248 results about "Broadband communication" patented technology

The invention provides an aircraft and satellite cluster collaborative navigation positioning accurate control method and system, and relates to the technical field of aviation, and the method comprises the steps: an aircraft receives a multi-system navigation signal from a satellite cluster, carries out the fusion processing of multi-source navigation information through employing a self-adaptive Kalman filtering algorithm, and carries out the navigation positioning of a satellite cluster based on the fused multi-source navigation information. Calculating the accurate position of the aircraft by adopting a differential positioning technology; and transmitting the optimal control instruction to a flight control system of the aircraft based on the accurate position of the aircraft in combination with a preset flight plan, calculating a correction instruction by using a satellite-ground cooperative trajectory correction algorithm when trajectory deviation is detected, and transmitting the correction instruction to the aircraft through a high-frequency broadband communication system, and closed-loop accurate control of the track of the aircraft is realized.

The invention discloses a communication method for broadband communication and satellite fusion, which comprises the following steps of: classifying data streams, ensuring priority transmission of high-priority data streams by adopting a self-adaptive flow control protocol, carrying out load balancing according to link quality in combination with a satellite and a ground communication link, and when the communication link fluctuates, outputting the data streams. The method can automatically switch to a backup link or adjust a transmission mode, guarantees the communication stability, predicts the satellite communication time delay through deep learning, carries out the time delay compensation, optimizes the communication efficiency, intelligently allocates bandwidth resources according to the user demands and geographic positions, optimizes the bandwidth utilization rate, reduces the data transmission amount through a self-adaptive compression algorithm, and improves the bandwidth utilization rate. Therefore, the problems of non-uniform bandwidth utilization, unstable link, delay fluctuation and insufficient flow control in the prior art are solved, and through intelligent prediction and real-time adjustment, the system can efficiently utilize bandwidth resources, ensure communication stability, reduce delay fluctuation and improve overall communication quality.

Aspects of the subject disclosure may include, for example, determining whether a first device is communicating under a bandwidth surplus with a fixed network, wherein the bandwidth surplus results at least in part from use by the first device of one or more link aggregation groups, wherein the one or more link aggregation groups comprise one or more satellite broadband communication channels as well as licensed cellular wireless spectrum, unlicensed wireless spectrum, or a combination of the licensed cellular and unlicensed spectrum; determining whether a second device is communicating under a bandwidth deficit with the fixed network; and responsive to the first device communicating under the bandwidth surplus and responsive to the second device communicating under the bandwidth deficit, allocating at least a portion of the bandwidth surplus associated with the first device to the second device. Other embodiments are disclosed.

A method can comprise receiving, by a system, a service request from a user equipment. The method can further comprise, based on the service request, determining respective signal strengths of respective radio access technologies of multiple radio access technologies being used for cellular broadband communications. The method can further comprise, identifying a subset of the respective radio access technologies for which a signal strength criterion is satisfied. The method can further comprise processing a subset of the respective signal strengths corresponding to the subset of the respective radio access technologies using a machine learning model to determine a selected radio access technology, wherein the machine learning model is trained to determine the selected radio access technology based on an energy efficiency metric of the system and based on resource allocation of the system. The method can further comprise communicating with the user equipment via the selected radio access technology.

The invention discloses an optical terminal intensity instrument and an earthquake monitoring service system and method, and the optical terminal intensity instrument comprises an optical fiber modem and an MEMS sensor module. The optical fiber modem comprises an MCU (Microprogrammed Control Unit) and an optical communication module electrically connected with the MCU; the optical communication module is used for realizing network access and data uploading; the MEMS sensor module is electrically connected with the MCU; the MEMS sensor module is used for collecting seismic intensity data in real time; and the optical fiber modem is used for providing a dual data transmission channel comprising broadband communication and the seismic intensity data. According to the technical scheme provided by the invention, the MEMS sensor is embedded in the optical fiber modem, and a more dense, more efficient and more economical solution is provided for earthquake early warning and intensity rapid reporting.

A method of measuring a direction between devices performing ultra-wide band (UWB) communication and each including a plurality of antennas includes transmitting signals through a plurality of antennas by a transmitting device and receiving the signals through a plurality of antennas by a receiving device, and selecting at least one of an angle of departure (AoD) method and an angle of arrival (AoA) method depending on statuses of the transmitting device and the receiving device and measuring the direction between the devices by using a selected method.

The invention provides a multi-level monitoring system suitable for a submarine optical cable. The multi-level monitoring system comprises a central monitoring system, a data acquisition terminal, an underwater robot, sonar equipment and an optical fiber sensor, wherein the central monitoring system comprises a master control platform and a power supply system, the data acquisition terminals are arranged at the starting point and the ending point of an optical cable line, the data acquisition terminals are connected with the central monitoring system in a high-broadband communication mode, and the data acquisition terminals receive data from the optical fiber sensors and send the data to the master control platform. The multiple optical fiber sensors are arranged on the whole optical cable line, the multiple sonar devices are arranged on the optical cable line, scanning data are transmitted to the central monitoring system at regular intervals, and the underwater robot conducts routing inspection along the line at regular intervals through a self-set routing inspection program. According to the invention, the safety and reliability of the optical cable system are obviously improved, the preventive maintenance process is optimized, the environmental adaptability is enhanced, the operation efficiency is improved, the operation cost is reduced, and the data safety is effectively guaranteed.

A satellite communication system includes a first frequency reference generator of a terminal, a broadband communication receiving channel, a second frequency reference generator of the terminal, and a broadband communication transmission channel. The first frequency reference generator generates a first frequency reference signal in a first frequency band. The broadband communication receiving channel for receiving broadband data at the terminal using the first frequency reference signal, wherein a legacy satellite system comprises a legacy communication transmission channel for transmitting data from a legacy satellite in the first frequency band. The second frequency reference generator generates a second frequency reference signal in a second frequency band. The broadband communication transmission channel for transmitting broadband data from the terminal using the second frequency reference signal, wherein the legacy satellite system comprises a legacy communication receiving channel for receiving data at the legacy satellite using the second frequency band.

Beam pointing directions and resource mappings are determined for performing wireless communications between a hub station and a plurality of user terminals. For at least one user terminal, a set of candidate beam pointing directions among a predefined set of beam pointing directions is determined such that the candidate beam pointing directions differ from a direction pointing towards the at least one user terminal by less than a predefined amount. For each of the candidate beam pointing directions, a quantity is determined that is positively correlated with an aggregated interference that a beam pointing in the respective candidate beam pointing direction would either cause for the remaining user terminals or receive from the remaining user terminals among the plurality of user terminals, and for serving the at least one user terminal, a candidate beam pointing direction is selected among the set of candidate beam pointing directions that minimizes said quantity.

Embodiments of the present disclosure relate generally to the field of communication between communicating devices and more particularly relates to a communication system for data transfer using human body communication. The communication system includes, a first communicating device to excite a conducting medium by transmitting electromagnetic (EM) signals to a surface of the conducting medium to generate a transmitter side resonance. Further, the communication system includes the conducting medium communicatively coupled to the first communication device via a body communication network. The conducting medium is configured to establish the broadband communication channel between the first communicating device and a second communicating device. Furthermore, the second communicating device comprising a receiver configured to receive the data as the EM signals transmitted from the first communicating device via the surface of the conducting medium.

A method of measuring a direction between devices performing ultra-wide band (UWB) communication and each including a plurality of antennas includes transmitting signals through a plurality of antennas by a transmitting device and receiving the signals through a plurality of antennas by a receiving device, and selecting at least one of an angle of departure (AoD) method and an angle of arrival (AoA) method depending on statuses of the transmitting device and the receiving device and measuring the direction between the devices by using a selected method.

The invention discloses a multi-photon phase detection method, device and system based on closed-loop quantum coherence and clock transition, and aims to solve the problems that the working frequency of an existing atom sensor is limited and the existing atom sensor is easily interfered by amplitude noise. According to the method, a closed ring is constructed in an atomic medium by applying a light field, a working alternating-current magnetic field and an auxiliary alternating-current magnetic field. The sum of the working frequency and the auxiliary frequency is set to be equal to the transition frequency of the first-order magnetic insensitive clock of the atom, so that decoupling of the working frequency to be measured and the inherent frequency of the atom is realized, and continuous tuning can be performed in a broadband range from Hertz to gigahertz. To-be-measured phase information is carried in a global phase of a closed loop, and is extracted by measuring an optical response signal and performing synchronous demodulation. According to the scheme, the self-consistency of the closed loop phase and the stability of clock transition are utilized, the influence of driving field amplitude noise and environment magnetic field fluctuation is effectively restrained, and the method is suitable for the fields of high-precision electromagnetic detection, broadband communication and the like.

The utility model provides a rail transit multi-network integration vehicle-mounted communication device, which comprises a shell, a power supply module and an antenna module, a broadband communication unit, a narrowband communication unit and a processing unit are arranged in the shell, and both the broadband communication unit and the narrowband communication unit are electrically connected with the antenna module; the broadband communication unit and the narrowband communication unit are connected with the switching unit through the processing unit. The broadband communication unit, the narrowband communication unit, the processing unit and the switching unit are electrically connected with the power supply module, and the broadband communication unit and the narrowband communication unit are connected with the antenna module through feeder lines; the utility model further provides a rail train which comprises the vehicle-mounted communication device. According to the utility model, the broadband communication unit and the narrowband communication unit are integrated in the vehicle-mounted communication device, so that the number of rail train communication equipment can be greatly reduced, high-efficiency utilization of hardware can be realized, the complexity of a rail vehicle-mounted communication system is reduced, and the overall stability and reliability are improved.

Methods, systems, and devices for wireless communications are described. A network entity transmits capability information that indicates a capability of the network entity to participate in wideband communication through use of multiple single carrier waveforms, where each of multiple single carrier waveforms are associated with a corresponding sub-band of multiple sub-bands within the wideband communication. The network entity receives an indication that configures the network entity for participation in the wideband communication via the multiple single carrier waveforms and the plurality of sub-bands. The network entity receives scheduling information that schedules the wideband communication via the plurality of single carrier waveforms and the plurality of sub-bands. The network entity participates in the wideband communication via the multiple single carrier waveforms and the plurality of sub-bands.

The invention relates to the technical field of intelligent door locks, and particularly discloses a low-cost and low-delay intelligent door lock device based on an ultra-wideband transceiver, which comprises the ultra-wideband transceiver connected with two antennas facing the inside and the outside of a door respectively and used for distinguishing whether a paired intelligent key is inside or outside the door, the two antennas are respectively defined as an inner antenna and an outer antenna; the communication module is provided with a Bluetooth transceiver and an ultra-wideband transceiver at the same time, an additional antenna is used for Bluetooth communication, and the inner antenna and the outer antenna are used for ultra-wideband communication; the ultra-wideband transceiver is in a low-power-consumption sleep mode when no user approaches, and is awakened after being in communication handshake with a key through Bluetooth when a user appears or approaches. The double-antenna switching is realized in the same data frame, so that the delay caused by switching different antennas by using a plurality of data frames is avoided, the requirement that the delay from the time when a user reaches an effective range to the time when the unlocking is completed is less than 500ms can be met, and the non-sensitive experience of the user is improved.

The present disclosure provides a method for providing a service by using an ultra wide band (UWB) communication. The method for a first UWB device, according to an embodiment of the present disclosure, comprises the steps of: receiving a downlink time difference of arrival (DL-TDoA) message from at least one UWB anchor through a UWB channel; confirming on the basis of the DL-TDoA message that positioning of the first UWB device has failed; receiving a ranging message including position information about a second UWB device from the second UWB device; and measuring the position of the first UWB device on the basis of the DL-TDoA message and the position information about the second UWB device.

The invention belongs to the technical field of communication, and discloses a communication method and system based on broadband interference suppression and target signal reconstruction, and the method comprises the steps: collecting an original broadband communication signal; carrying out compressed sampling on the preprocessed signal to obtain compressed data; performing time-frequency domain conversion on the compressed data, and performing sparse representation on the signal by using the sparse dictionary to obtain time-frequency domain conversion data; reconstructing an original broadband communication signal from the time-frequency domain conversion data by adopting an iterative reconstruction algorithm and combining an interference suppression strategy, and eliminating an interference component to obtain a target signal; and comparing the quality index of the reconstructed target signal with a preset performance index, and dynamically optimizing at least one key parameter of compressed sampling, sparse representation, iterative reconstruction or interference suppression according to a comparison result. According to the method, a complex and changeable interference environment can be adaptively dealt with, it is ensured that the system always keeps the optimal processing effect, and the robustness is far better than that of a traditional method adopting fixed parameters.

The invention discloses a terminal equipment communication method and device, equipment, a medium and a program product. The terminal equipment communication method comprises the following steps: acquiring terminal equipment information of each to-be-communicated terminal in a to-be-communicated terminal set; the terminal equipment information comprises narrowband communication parameters and broadband communication parameters; based on the narrowband communication parameters, corresponding broadband communication parameters are sent to terminals to be communicated in a terminal set to be communicated in a narrowband communication mode; and in response to parameter confirmation messages fed back by the target to-be-communicated terminal in different time windows, sending a communication connection request to the target to-be-communicated terminal based on the target broadband communication parameters corresponding to the target to-be-communicated terminal, and establishing service communication based on a connection confirmation message fed back by the target to-be-communicated terminal. According to the technical scheme of the embodiment of the invention, the communication security can be improved, and the communication cost in a high-density scene can be reduced.

Proposed are a method and an apparatus for receiving a PPDU in a wireless LAN system. Specifically, a receiving STA receives a PPDU from a transmitting STA via broadband communication and decodes the PPDU. The PPDU is received on the basis of an OFDMA scheme. The PPDU includes a first signal field. The first signal field includes first information on a preamble puncturing pattern for each 80 MHz band in the broadband communication. The first information consists of a 4-bit bitmap for the 80 MHz band.

The invention discloses a frequency multiplexing implementation method of a ground-air broadband communication system, which comprises the following steps: setting a plurality of multiplexing frequencies for aggregating downlink subcarriers for the ground-air broadband communication system, the plurality of multiplexing frequencies multiplexing the frequency of a ground operator system; arranging a ground-air system base station which is spatially isolated from a ground same-frequency network base station of the ground operator system for the ground-air broadband communication system along an air route according to the plurality of multiplexing frequencies; according to the coverage condition of a plurality of multiplexing frequencies in the ground operator system, selecting an actual multiplexing frequency for the laid ground-air system base station from the plurality of multiplexing frequencies; and realizing ground-to-air communication of the ground-to-air broadband communication system by using the actual multiplexing frequency of the ground-to-air system base station. According to the frequency multiplexing technology, the inter-system co-frequency interference caused by frequency multiplexing can be reduced, and the design complexity and the construction cost are low.

The invention discloses a miniaturized high-stability satellite-borne Rydberg atomic broadband communication receiver system, which realizes phase locking of probe light and coupling light through an optical frequency comb, realizes coupling of multiple paths of coupling light paths through a wavelength division multiplexing system, reduces the complexity of the system, and improves the system reliability. The optical lens and the glass air chamber are fixed through the hydrogen-oxygen catalytic bonding (HCB) bonding technology, the stability of Rydberg atom system space application is improved, the complexity of the Rydberg atom multi-frequency-point communication system is simplified, the Rydberg atom spectrum measurement range is widened, and the measurement accuracy of the Rydberg atom multi-frequency-point communication system is improved. A multi-frequency-point, miniaturized and ultra-stable communication receiver system can be realized, and a new method is provided for a satellite-borne Rydberg atomic broadband communication receiver.

A waveguide assembly includes first and second waveguides. The first waveguide includes silicon, first and second ends, an end member, and a tapered member. The end member extends from the first end. The tapered member extends from the end member to the second end. The second waveguide is optically coupled to and spaced away from the first waveguide. The second waveguide includes silicon nitride, first and second members, and a non-tapered member. The non-tapered member extends from the first member to the second member and in parallel with and opposing the tapered member. An effective refractive index of the non-tapered member matches an effective refractive index of the tapered member at a first plane. The first plane extends through the non-tapered member and the tapered member and perpendicular to a second plane. The second plane extends parallel to a direction of overlap between the first and second waveguides.

Enhanced protocols and devices may be used to alleviate loss of spectrum efficiency in wideband transmission. The protocols may implement a wideband transmission opportunity (TXOP) truncation where one or more of the channels involved in communication over the wideband are released. In one scenario, an access point (AP) may receive, from a wireless transmit receive unit (WTRU), a first CF-End frame that includes a duration field and a basic service set identifier (BSSID) field that includes an individual / group bit. On a condition that the individual / group bit of the BSSID field has a value of one (1), the AP may determine that a scrambling sequence of the first CF-End frame indicates a bandwidth associated with a transmit opportunity (TXOP) being truncated by the WTRU. The AP may then transmit a second CF-End frame at the bandwidth indicated by the scrambling sequence of the first CF-End frame.

The invention discloses a multi-mode converged communication system suitable for a long tunnel, and relates to the technical field of tunnel engineering. According to the invention, the plurality of base stations supporting UWB, broadband communication and narrowband communication at the same time are arranged in the tunnel, in the aspect of communication, the advantages of various communication modes can be brought into full play, and after a networking device collects data, the communication technology with the highest efficiency can be selected for transmission according to different data types; in the aspect of positioning, an ultra wide band (UWB) wireless communication technology is adopted, a high-precision positioning service can be provided for related networking equipment in a tunnel, and therefore on the basis of low cost, a positioning service and a multi-system communication service are provided for tunnel engineering at the same time. Besides, through the combination of wired and / or wireless networking technologies, stable and efficient signal transmission is provided for unmanned or few-people networking equipment in the moving process, meanwhile, the networking equipment is more flexible when accessing a base station, and good application and popularization prospects are achieved.

The embodiment of the invention relates to search space configuration for broadband communication. A method, a network node and a wireless device (WD) for search space configuration for broadband communication are disclosed. The method implemented by the WD includes monitoring the PDCCH at two time slots n0 and n0 + x, and wherein x is greater than one.

A method implemented by a first device operating in a communication system includes: obtaining a channel representation of a set of channels between the first device and a second device, wherein the set of channels corresponds to a set of subcarriers, the first device has multiple antenna ports, and the second device has one or more antenna ports; the first device determines one or more communication filters based on at least the channel representation; the first device applies the one or more communication filters to communication on at least one antenna port of the multiple antenna ports of the first device, wherein the communication is performed on the set of subcarriers.

The invention provides a low-altitude unmanned system air node optimal deployment method based on communication-link-energy consumption joint optimization. The method comprises the following steps: initializing an unmanned aerial vehicle group; the system constructs a performance model according to the real-time channel information, constructs a multi-objective collaborative optimization problem, and solves the multi-objective optimization problem by adopting an MOPSO-HGD algorithm to obtain an optimal result; deploying the unmanned aerial vehicle group to the optimal position according to the optimal result to form a virtual distributed MIMO array structure; setting an unmanned aerial vehicle electric quantity threshold value, judging the size of each unmanned aerial vehicle remaining electric quantity and the unmanned aerial vehicle electric quantity threshold value, and if the unmanned aerial vehicle remaining electric quantity is smaller than the unmanned aerial vehicle electric quantity threshold value, recycling the unmanned aerial vehicle; otherwise, re-determining the position of the unmanned aerial vehicle group; through a closed-loop control mechanism of channel perception-multi-target optimization-dynamic adjustment, the unmanned aerial vehicle relay system can still keep a high signal-to-noise ratio and strong robustness in a complex low-altitude environment, is suitable for scenes such as low-altitude broadband communication, emergency rescue and urban information networks, and has a good engineering application prospect.

The present disclosure provides a method for UWB session management. A method by which a first electronic device performs UWB communication, according to one embodiment of the present disclosure, may comprise the steps of: performing UWB ranging with a user device through a UWB session; determining, on the basis of the UWB ranging, whether movement of the UWB session to a second electronic device registered in the first electronic device is necessary; and, if it is determined that the movement of the UWB session to the second electronic device is necessary, transmitting UWB connection information about the second electronic device, wherein the UWB connection information can be used for connecting a UWB session between the user device and the second electronic device.

The invention relates to a method for packaging media and data for transmission over a broadband communications network link for display at a terminal destination. Features of the method included creating desired media segments for transmission to the terminal destination and for creating targeting information, for example in whole or in part in the form of metadata, for transmission to the terminal destination. Other features include packaging the created media segments and the created targeting information in a single package and unpacking the single package for display of the targeted media at the terminal destination. In another aspect, the invention can provide a method for unpacking media and data for display at a terminal destination implementing, at the terminal destination, receiving a single package containing media segments and instructions regarding handling of the media segments, quickly unpacking the media segments and the instructions from the single package and, based on the unpacked instructions, assembling one or more of the media segments for display at the terminal destination.

The invention discloses a real-time-delay-based programmable metasurface array antenna, which comprises a metasurface antenna array and a real-time-delay feed network, and is characterized in that the metasurface antenna array comprises 8 * 8 metasurface antenna units formed by first dielectric layers, metal plate layers and second dielectric layers, the first dielectric layers are integrated with 7 metal patches, a first diode and a second diode, and the second dielectric layers are integrated with 7 metal patches; the on-off state of the diodes is controlled through the direct current bias circuit, and 0-degree, 90-degree, 180-degree and 270-degree four-state phase regulation and control are achieved. The second dielectric layer comprises five metal patches which are matched with the through holes and the copper columns to realize upper and lower layer electric connection; the real time delay feed network adopts a 1: 8 * 8 power divider feed network, feeds by attaching a metal patch, and provides initial time delay related to the position for each unit. The method solves the problems of discrete phase quantization and frequency dispersion of a traditional array, is suitable for 5G / 6G broadband communication, dynamic beam tracking and other scenes, and remarkably improves the beam scanning precision and reliability.