444results about "Active radio relay systems" patented technology

According to some embodiments, a method is performed by a source network node for performing a sidelink path switch. The method comprises determining to switch a remote wireless device to sidelink communication with a target relay wireless device. The target relay wireless device is in an idle or inactive state and the target relay wireless device is served by a target network node different from the source network node. The method further comprises transmitting an indication to the target network node of the path switch involving the target relay wireless device.

A repeater device for New Radio (NR) communication, includes a baseband processor that establishes a communication link with a base station and decodes control information that is received from the base station through a control channel. The baseband processor further aligns a timing reference of the repeater device with that of an NR cell frame for an uplink or a downlink time division duplex (TDD) switching, based on the decoded control information. The baseband processor further selects and forms one or more donor beams of RF signals at a donor side of the repeater device and one or more service beams of RF signals at a service side of the repeater device, based on the decoded control information and the aligned timing reference with that of the NR cell frame for the uplink or the downlink TDD switching for communication in an NR frequency band.

The invention relates to the technical field of wireless communication, in particular to a multi-orbit elastic communication method and system, and the method comprises the steps: monitoring the performance parameters of a multi-orbit satellite link in real time, and calculating the comprehensive score of each satellite link of the multi-orbit satellite link based on a preset scoring function; dynamically adjusting a configuration strategy of the main backhaul link according to the comprehensive score and a reinforcement learning model; when a network fault or congestion is detected, activating an alternative backhaul path to complete flow redirection and breakpoint resume, and executing a corresponding disaster recovery strategy according to a fault level; and dynamically adjusting bandwidth allocation according to the authorization level of the user equipment. According to the invention, the elastic communication service with wide-area coverage, low time delay and high reliability can be realized through multi-orbit satellite cooperation, efficient disaster recovery switching and priority resource guarantee in a complex scene.

A wireless communication network is described, which includes one or more relay devices and one or more user devices, UEs. A relay devices provides a first bidirectional link having first relay resources, and a second bidirectional link having second relay resources, the first and second bidirectional links using a first interface for a communication with a radio access network, RAN, of the wireless communication network, e.g., the Uu interface. A UE is to perform a direct communication with a network entity of the wireless communication network via the relay device on one or more the first relay resources or on one more of the first and second relay resources using a second interface for a device-to-device, D2D, or sidelink, SL, communication in the wireless communication network, e.g., the PC5 interface.

The invention provides a verification test method and device for a satellite laser link and computer equipment. The method comprises the following steps: determining a zero point coordinate of a turntable according to a preset calibration rule; establishing a turntable reference coordinate system, a turntable zero point coordinate system and a laser terminal coordinate system; when the rotary table is in a zero-point coordinate state, the coordinate systems are jointly used, an angle deviation correction matrix of the laser terminal coordinate system and the rotary table zero-point coordinate system is determined, and space unified operation is achieved; the method comprises the following steps: after acquiring orbit and attitude data about a target satellite for a simulation test, generating a corresponding target control quantity according to the orbit and attitude data and an angle deviation correction matrix; and controlling the operation of a laser terminal and a rotary table in the satellite laser link test system by using the control quantity so as to simulate laser link capturing, tracking and establishing of the target satellite. Therefore, laser link capturing, tracking and establishing of the target satellite can be accurately simulated by establishing a unified space reference.

Disclosed is a method of providing DOP forecasts for LEO navigation for routing of vehicles, aircraft, alerting humans in vehicles, or wireless devices, and bandwidth forecasts for LEO communications. The method includes accessing a 3D map of an area including structure solids and generating cuboids in spaces not contained in the structure solids; and iteratively over time increments, calculating LEO satellites visible from the cuboids using the map and, using at least the calculated visibility, determining forecasts for the cuboids at the time increments. Also included is compressing the determined forecast spatially and temporally; and distributing the compressed DOP forecast via a CDN, responsive to queries from requestors. Systems of the requestors can take into account the forecast for routing vehicles or alerting humans in vehicles to a predicted navigation impairment. Risk analysis is applied to improving computation and distribution of forecasts. Forecasts are applied to satellite deployment.

A geosynchronous equatorial orbit (GEO) ground station may concurrently receive at a tracking receiver both a first signal (downlink data) at a first frequency from a GEO satellite and an internally-generated calibration signal at a second frequency.. Based on the calibration signal, the tracking receiver may determine a first phase value for the second frequency, then, from the first phase value, determine a second phase value associated with the first frequency based on a first phase offset between the first frequency and the second frequency according to a set of receiver calibration factors, then generate a phase correction value for signals received at the first frequency without interrupting the downlink data coming from the GEO satellite. Having accurate phasing allows the tracking receiver to report tracking errors correctly to the antenna controller and therefore allow for improved tracking performance.

The focus of the present disclosure relates to a secure global satellite network that securely transmits data from a ground station to one or more geosynchronous orbit satellites within a communicatively linked constellation of geosynchronous satellites. The communicatively linked constellation of geosynchronous satellites covers the entire planet, allowing access to users anywhere on the planet. The communicatively linked constellation of geosynchronous satellites also covers satellites in orbit above the planet, enabling any satellite to send or receive data through the communicatively linked constellation of geosynchronous satellites at any point in the satellite's orbit. The communicatively linked constellation of geosynchronous satellites functions as a communications backbone, enabling global communications coverage between any points on the earth, between any point on the earth and a satellite anywhere in its orbit, or between two satellites anywhere in their orbit.

The present invention relates to the technical field of communications, and particularly provides a relay communication method and apparatus, a device, and a storage medium, The method comprises: a relay device receives first indication information from a network device, the first indication information being used for indicating a beam state of a first beam of the relay device (S201); the relay device determines the beam state of the first beam according to the first indication information (S202). According to the technical solution of the present invention, beam-based interference management of an NCR can be achieved, and energy efficiency can be improved.

Various solutions for uplink synchronization in non-terrestrial network (NTN) communications are proposed. An apparatus implemented in a user equipment (UE) receives a system information block (SIB) of a target cell via a non-terrestrial (NT) network node of the NTN. The apparatus obtains an explicit epoch time from the SIB of the target cell. Then, the apparatus performs an uplink (UL) synchronization with the target cell through adjusting an uplink transmit time according to the explicit epoch time.

A precoding method, performed by a reconfigurable intelligent surface (RIS) array, includes determining a phase shift list corresponding to the RIS array, in which the phase shift list includes at least one row of phase shift sequence, the phase shift sequence includes a phase shift of each RIS array element in the RIS array, each row of phase shift sequence is configured to cause the RIS array to reflect an incident signal along a pair of reflection angles, and each row of phase shift sequence corresponds to one index value; acquiring a first index value from a user equipment (UE); determining a first phase shift sequence corresponding to the first index value from the phase shift list; and precoding the RIS array by configuring the phase shift of each RIS array element in the RIS array according to the first phase shift sequence.

To provide a communication system capable of maintaining a FDD system communication between a base station apparatus and a terminal apparatus and reducing the weight and power consumption of a radio relay apparatus.SOLUTION: A service link and a feeder link use the same frequency band (shared frequency band) in which an FDD uplink band in which a plurality of frequency channels are adjacently arranged and an FDD downlink band in which a plurality of frequency channels are adjacently arranged are spaced apart from each other via a predetermined guard band. A radio relay apparatus includes a shared antenna, a frequency conversion unit that converts a frequency of an REV (reverse) link signal in a first frequency channel of an FDD uplink band into a frequency of a second frequency channel of an FDD downlink band, and converts a frequency of an FWD (foward) link signal in the second frequency channel of the FDD uplink band into a frequency of a first frequency channel of the FDD downlink band, and a single power amplifier that amplifies the REV link signal and the FWD link signal.SELECTED DRAWING: Figure 12

In some embodiments, a communications system can include a plurality of low earth orbit (LEO) satellites deployed at different altitudes and configured to communicate with one or more terrestrial devices and with one another. The communications system may further include a plurality of geosynchronous (GEO) satellites deployed above the plurality of LEO satellites. The plurality of LEO satellites may cooperate with one another and with the plurality of GEO satellites to provide a global communication network having redundant point-to-point communication.

Various arrangements of transmit and receive shared-aperture array antenna systems are presented herein. The arrangements can include an antenna that includes: a planar substrate; a first row of a first plurality of transmit patches arranged on the planar substrate; a second row of a plurality of receive patches arranged on the planar substrate; and a third row of a second plurality of transmit patches arranged on the planar substrate. The first row, second row, and third row can be parallel and the second row can be between the first row and the third row.

A temperature sensing device includes a temperature sensor to measure a temperature of a cooking chamber of a cooking appliance. A housing of the temperature sensing device is configured to be mounted on the cooking appliance. A Printed Circuit Board Assembly (PCBA) inside the housing is coupled to the temperature sensor, and an insulating layer is located outside an interior wall of the housing. In one aspect, an antenna is coupled to the PCBA to wirelessly transmit data from the temperature sensing device indicating the measured temperature. In another aspect, the temperature sensing device includes a temperature gauge with a needle to indicate the measured temperature, and a motor inside the housing to actuate the needle. According to another aspect, the temperature sensing device is a wireless signal repeater including an exterior antenna and an interior antenna to transmit signals through a wall of the cooking appliance.

A wireless communication network is described that includes one or more relay devices and one or more user equipments (UEs). A relay device provides a first bi-directional link comprising a first relay resource and a second bi-directional link comprising a second relay resource, the first bi-directional link and the second bi-directional link communicating with a radio access network (RAN) of a wireless communication network using a first interface, such as a Uu interface. The UE is configured to use a second interface, such as a PC5 interface, for device-to-device (D2D) communication or sidelink (SL) communication in a wireless communication network by a relay device on one or more first relay resources or on one or more of the first relay resource and the second relay resource, direct communication with a network entity of a wireless communication network is performed.

The invention relates to a lightweight hot backup system and method for a satellite master station antenna, and the method comprises the steps: receiving an intermediate frequency signal and a carrier signal when the main link structure communicates with a satellite through setting a main link structure, a standby link structure and a service control module, and carrying out the hot backup of the satellite master station antenna when the carrier signal disappears and the power of the intermediate frequency signal is stabilized in a normal interval; and switching the main link structure into a standby link structure, so that the standby link structure communicates with the satellite, and meanwhile, sending maintenance information for the main link structure to notify a technician to carry out maintenance. Moreover, when the standby link structure communicates with the satellite, the service control module also receives the intermediate frequency signal and the carrier signal, and sends the maintenance information of the standby link structure when the carrier signal disappears and the power of the intermediate frequency signal is stabilized in a normal interval, so that the whole switching process does not need to depend on manual operation to complete hardware switching, the consumed time is short, and the switching efficiency is improved. And the switching delay is reduced.

An embodiment provides a method for operating a relay UE in a wireless communication system, the method comprising: establishing a PC5 unicast link with a remote UE, by the relay UE; transmitting an RRC setup request to a first base station, by the relay UE; receiving an RRC reject message including a first waitTime from the first base station, by the relay UE; and transmitting, on the basis of reception of the RRC reject message, a first notification message to the remote UE, by the relay UE, wherein the first notification message includes a second waitTime based on the first waitTime received by the relay UE from the first base station.

The invention provides a large-scale low-orbit constellation topology construction method and system based on the reliable reachable distance of an optical transceiver and a storage medium, and the method comprises the steps: 1, building an inter-satellite laser link probability evaluation model based on the capturing probability of an aiming-capturing-tracking system and the motion characteristics of satellites; 2, on the basis of the inter-satellite laser link probability evaluation model, constructing a giant satellite network topology evaluation model with inter-satellite link time average stability, satellite hop count and communication time delay as core optimization targets, and outputting a globally optimized laser link connection scheme; and 3, for a laser link connection scheme, proposing a giant constellation network topology design algorithm based on a capture probability, and constructing a constellation topology by adopting a minimum unit of a space symmetric constellation. The method has the beneficial effects that the constellation topology is constructed by adopting the minimum unit of the space symmetric constellation, so that the topological structure is stabilized, the channel gain is improved, the end-to-end delay is shortened, and the average hop count and the variance of the network are reduced.

Certain aspects of the present disclosure provide techniques for dynamically updating a forwarding configuration of a mobile relay. An exemplary method for wireless communication at a relay includes modifying forwarding behavior based on a change in channel conditions of a communication link between the relay and a network entity; and forwarding one or more communications between the network entity and a user equipment (UE) according to the modified forwarding behavior.

The invention discloses a time-frequency offset tracking method in a Tiantong satellite monitoring low-orbit satellite system, which belongs to the field of satellite communication, and comprises the following steps: acquiring satellite orbit information, satellite ephemeris information and positioning information of a low-orbit satellite, and resolving current Doppler frequency offset information; performing frequency pre-compensation according to the Doppler frequency offset information, and performing compensation by using the frequency offset captured by the FCCH; the satellite-borne terminal receiver carries out carrier frequency estimation by using a downlink channel, so that the carrier residual frequency difference of a received signal is estimated, and frequency correction is carried out; starting downlink timing tracking; uplink frequency offset compensation is started, so that the frequency of a signal from the low-orbit satellite to the Tiantong satellite is the expected carrier frequency of the Tiantong satellite; and carrying out transmission timing correction by adopting the spaceborne terminal timing drift rate, and carrying out uplink timing adjustment. According to the method, normal access and stable data transmission of the satellite-borne terminal can be realized.

The embodiment of the invention provides an orbit-based laser link dynamic capturing, tracking and establishing ground verification device and method, and relates to the technical field of satellite communication, the device comprises a laser platform, a two-dimensional turntable, a turntable controller, a laser terminal and a terminal ground detector, and the laser terminal is mounted on the two-dimensional turntable; the laser platform comprises a collimator and a control computer; the collimator provides a far-field environment for inter-satellite laser link light beams; the control computer sends track data to the terminal ground detector and the turntable controller; the turntable controller calculates the target control quantity of the two-dimensional turntable by using the track data, and drives the two-dimensional turntable to rotate to a position corresponding to the target control quantity; the terminal ground detector broadcasts track data to the laser terminal; and the laser terminal calculates an inter-satellite pointing vector by using the orbit data, drives a light beam emitted by the laser terminal to point to an opposite end according to the inter-satellite pointing vector, and emits the light beam to the opposite end. According to the scheme, the inter-satellite capturing and tracking link establishment capability of the laser terminal and the laser link stability can be fully verified.

An apparatus is disclosed, the apparatus comprising a means for receiving selection of a relay system associated with a base station (10) of a communications network, the relay system comprising a first antenna (15) for substantially fixed orientation towards an antenna (12) of the base station and a second antenna (16) which is mechanically movable about one or more axes responsive to the control data to provide one of a range of possible orientations. The apparatus may also comprise a means for sending control data to the selected relay system for controlling the orientation of the second antenna, the control data comprising at least positioning instructions received from a node of the communications network for causing positioning of the second antenna to a particular orientation associated with a mobile target object (19).

A wireless communication device includes an antenna array with multiple antenna elements, an array of power amplifiers, and an array of phase shifters. Each antenna element is coupled to a power amplifier and a phase shifter. The device also includes transmitter circuitry coupled to the antenna array to encode a constant amplitude signal, which includes a power amplifier enable code to indicate which power amplifiers are to run in a subsequent data sample and a beam direction code to control beam direction of each phase shifter of the array of phase shifters in the subsequent data sample. The constant amplitude signal is then provided to the array of antenna elements and amplitude and phase modulation is combined over an air interface into a composite modulated signal.

In some embodiments, a communications system can include a plurality of low earth orbit (LEO) satellites deployed at different altitudes and configured to communicate with one or more terrestrial devices and with one another. The communications system may further include a plurality of geosynchronous (GEO) satellites deployed above the plurality of LEO satellites. The plurality of LEO satellites may cooperate with one another and with the plurality of GEO satellites to provide a global communication network having redundant point-to-point communication.

Disclosed is a method of providing DOP forecasts for LEO navigation for routing of vehicles, aircraft, alerting humans in vehicles, or wireless devices, and bandwidth forecasts for LEO communications. The method includes accessing a 3D map of an area including structure solids and generating cuboids in spaces not contained in the structure solids; and iteratively over time increments, calculating LEO satellites visible from the cuboids using the map and, using at least the calculated visibility, determining forecasts for the cuboids at the time increments. Also included is compressing the determined forecast spatially and temporally; and distributing the compressed DOP forecast via a CDN, responsive to queries from requestors. Systems of the requestors can take into account the forecast for routing vehicles or alerting humans in vehicles to a predicted navigation impairment. Risk analysis is applied to improving computation and distribution of forecasts. Forecasts are applied to satellite deployment.

This electronic device comprises a donor antenna, a service antenna, a core case in which the donor antenna and the service antenna are disposed, and an outer case which at least partially covers the core case. The electronic device relays radio waves by transmitting, from the service antenna, radio waves received by the donor antenna. The donor antenna and the service antenna are disposed such that a corner of the core case is therebetween. The outer case is configured to cover the donor antenna and the service antenna but not cover the corner of the core case.

To suppress wraparound interference in a wireless repeater used in a mesh network.SOLUTION: A wireless repeater which amplifies radio waves input via a first antenna and outputs the radio waves from a second antenna is configured to: measure first wireless communication quality of signals input via a first beam while the signals input via the first beam set in the first antenna are not amplified or output by the second antenna; measure second wireless communication quality of the signals input via the first beam while the signals input via the first beam are amplified and output via a second beam set in the second antenna; and determine and set a beam to be used for communication in at least one of the first and second antennas, based on the amount of change between the first wireless communication quality and the second wireless communication quality.SELECTED DRAWING: Figure 4

In a repeater control device (6) for controlling a communication repeater (2) that has a beamforming function and relays a wireless communication signal including communication data addressed from a transmission device (3) to a reception device (4), the repeater control device (6) includes: a parameter determination unit that determines a gain adjustment value for adjusting input power to an amplifier that amplifies the wireless communication signal relayed by the communication repeater (2), on the basis of an evaluation value indicating communication quality in the reception device (4) and calculated on the basis of: state information indicating a state of the communication repeater (2); a beam pattern requested when the communication repeater (2) transmits the wireless communication signal to the reception device (4); transmission path information indicating a state of a transmission path between the communication repeater (2) and the reception device (4); and reception device information indicating a state of the reception device (4).