82 results about "Link budget" patented technology

The invention provides a wireless resource scheduling method and device used in a scene in which a mobile phone is directly connected with a satellite, and relates to the technical field of satellite communication, and the method comprises the steps: constructing an electromagnetic map which represents the corresponding relation of a geographic position, a physical resource block and ground interference power in a satellite beam coverage area; link budgeting is carried out on the multiple user terminals in combination with the real-time orbit geometric parameters of the satellite and the electromagnetic map, and the signal to interference plus noise ratio of each user terminal on each physical resource block is predicted; based on the predicted signal to interference plus noise ratio, adopting a proportional fair marginal gain greedy algorithm to allocate an optimal continuous spectrum resource block for each user terminal; on the allocated spectrum resources, optimizing and reallocating the total transmitting power of the satellites by adopting a water injection algorithm; and a final spectrum-power joint scheduling scheme is generated, and subsequent link self-adaption and data transmission are guided. According to the invention, the spectrum efficiency, throughput and connection stability of the system are obviously improved.

The invention provides a wireless networking relay adjusting method and device and an elevator Internet of Things system, and the method comprises the steps: carrying out the cooperative processing of a low-frequency signal in an elevator shaft and a high-frequency signal in an elevator car through joint channel estimation, and obtaining the fusion feature of a communication signal between the elevator car and the elevator shaft; establishing a dual-band communication link between the elevator shaft and the elevator car by using the fusion feature, and further determining a link budget margin of each relay node in the dual-band communication link; a joint estimation value of the signal coverage intensity of the elevator car in the next signal blind area is determined according to the signal attenuation characteristics and the multipath interference characteristics of all the Internet of Things areas; and when the joint estimation value of the signal coverage intensity is lower than a preset signal threshold, performing pre-adjustment on the relay capability of high-frequency short-distance communication in the dual-band communication link of the next signal blind area based on each link budget margin. On the basis of the scheme, dual-frequency-band cooperative adjustment of the communication signals in the signal blind area of the elevator Internet of Things system can be achieved.

In the NB-IoT NTN deployment, the coverage area can be as large as hundreds of thousand square kilometers. In such huge geography area, the number of IoT devices that need to access the satellite will be massive. In another hand, the UL capability of NB-IoT is severely suppressed by large repetition number due to the limited link budget. To enlarge the system capacity, multiplexing of UEs by usage of orthogonal cover codes (OCC) for NPUSCH format 1 and NPRACH is proposed in 3GPP as a Release 19 IoT NTN work item. The Invention incudes various methods of overlaying the OCC code to the NPUSCH and NPRACH; various procedures on support OCC for NPRACH and NPUSCH such as random access and connection establishment; other related 3GPP specification impact.

The invention provides a method for determining a radio frequency link resource optimization model of a heterogeneous network and related equipment. The method comprises the following steps of: performing uniform mathematical modeling representation on signal coexistence, interference, blockage, loss and time division multiplexing link budget processes of parallel signal links in a multi-band, multi-mode and multi-system reconfigurable radio frequency front end; based on the mathematical modeling representation, dynamically configuring a regulation and control system through a topological connection mode of a time division multiplexing reconfigurable radio frequency front-end resource pool and a signal chain parameter; and optimizing dynamic topology planning and link parameters of the time division multiplexing reconfigurable radio frequency front-end resource pool by using a multi-agent deep reinforcement learning method.

The invention belongs to the technical field of wireless communication, and discloses an NTN scene physical shared channel link self-adaption method, which comprises an uplink physical shared channel link self-adaption process and a downlink physical shared channel link self-adaption process. The invention provides a physical shared channel link self-adaption method suitable for an NTN scene. According to the method, the LOS path link budget and the channel measurement value are innovatively combined to carry out inner ring maintenance, meanwhile, the RLC state report is utilized to carry out outer ring maintenance, and the uplink and downlink physical shared channel transmission performance under the NTN scene is greatly improved. According to the method, link adaptive processes are respectively designed for an uplink and a downlink, a theoretical signal-to-noise ratio is estimated through an LOS path link budget formula, calibration is performed by using a channel measurement value, and an accurate inner ring value is generated. According to the innovation, the LOS path signal stability characteristic of the NTN scene is utilized, the problem of performance loss caused by the fact that an existing ground inner ring technology is too conservative in the NTN scene is solved, and the transmission performance is optimized by predicting the inner ring value at the scheduling moment.

The invention discloses a multi-focus composite Fresnel phase diagram rapid generation and power equalization method and system for one-to-many free space laser communication. According to the method, aiming at a scene in which a plurality of user targets are located at different directional angles and different propagation distances, a focusing + directional single-beam phase is constructed for each target on the basis of analyzing a Fresnel zone lens phase and a linear tilt phase, and the phase is taken after complex field superposition is performed according to a preset power weight, so that the target target is obtained. A composite phase diagram for a phase-type spatial light modulator (SLM) is directly obtained. The power weight is preset according to a link budget or a task demand so as to realize on-demand distribution and equalization of multi-beam output power; and meanwhile, fixed phase bias can be introduced to each beam to suppress inter-beam interference fringes. According to the method, frame-by-frame iterative solution is not needed, the calculation complexity is low, and high-frame-rate and low-delay online updating is easy to realize.

Embodiments of the present disclosure relate to an enhanced link budget procedure for initial access. According to embodiments of the present disclosure, a network device transmits a configuration of a random access channel, and a terminal device determines coverage enhancement and power boosting based on the configuration and a measured power. Therefore, collisions among terminal devices are reduced.

This patent discusses innovative methods for enhancing PDCCH (Physical Downlink Control Channel) and CORESET (Control Resource Set) configurations. Given the constraints of link budgets in current communication systems, accurate decoding of the PDCCH poses significant challenges, necessitating new solutions to improve signal reliability and effectiveness. First, the patent proposes a method for PDCCH repetition indication and configuration. This involves introducing new fields in PDCCH-ConfigSIB1 or ControlResourceSetZero, defining new values within ControlResourceSetZero, and reinterpretating existing fields in PDCCH-ConfigSIB1. Secondly, the patent introduces a method for CORESET symbol extension, incorporating the concepts of REG-bundle (Resource Element Group) and / or CCE (Control Channel Element) bundling. Lastly, a CORESET featuring new CCEs, REG-bundles, and / or Adaptation Layers (AL) is proposed.

The invention relates to a power consumption optimization method and related equipment. The method is applied to terminal equipment. And the terminal equipment acquires the battery power when detecting that the satellite communication mode is started for communication. And if the battery electric quantity is greater than or equal to the preset electric quantity threshold value, the terminal equipment determines the channel quality based on the downlink signal sent by the satellite, and determines an air interface link budget according to the channel quality. The terminal device also determines a first target transmitting power according to the channel quality and the battery power, and sends an uplink signal according to the first target transmitting power. According to the technical scheme, the first target transmitting power matched with the air interface link budget is determined according to the channel quality and the battery capacity, and the uplink signal is transmitted according to the first target transmitting power, so that the uplink signal can be prevented from being transmitted through high transmitting power under the condition of relatively high air interface link budget; and the power consumption of the terminal equipment is too high.

The present invention proposes a performance evaluation method for a long-distance space reflection communication system. The reflection communication system includes a transmitter, a receiver, and a reflector. The transmitter is configured to emit a transmission signal, the reflector is configured to reflect the transmission signal to obtain a reflection signal, and the receiver is configured to receive the reflection signal. The method comprises obtaining device parameters of the reflection communication system and position information of the transmitter, receiver, and reflector; calculating a basic reflection communication link budget for the reflection communication system based on a bistatic radar equation; calculating a beam pattern based on the device parameters, and calculating a correction coefficient based on the beam pattern and position information; and using the correction coefficient to correct the basic reflection communication link budget to obtain a corrected reflection communication link budget value, thereby achieving link performance evaluation.

This disclosure relates to a low-altitude airspace coverage method, apparatus, device, storage medium, and program product in the field of wireless communication technology. The method includes: mapping low-altitude flight paths to the ground and then selecting target ground base stations; calculating the elevation angle of the target ground base station facing the flight path airspace; determining the beamwidth of a lens antenna based on link budget results; and further determining the required number of lens antenna beams within the elevation angle range based on the elevation angle of the target ground base station facing the flight path airspace and the beamwidth of the lens antenna. This disclosure uses a Luneburg lens antenna instead of the AAU antenna commonly used in existing 5G ground base stations. It selects the elevation angle of the target ground base station facing the flight path airspace after mapping low-altitude flight paths to the ground, and obtains the number of lens antenna beams based on the beamwidth of the lens antenna obtained from the link budget results. This low-altitude airspace coverage method is low-cost and achieves effective low-altitude airspace coverage.

The invention provides a data transmission method and system based on the LoRaWAN Internet of Things, and relates to the technical field of data transmission of the LoRaWAN Internet of Things. The method comprises the following steps: receiving equipment state information reported by terminal equipment, inferring an estimated attenuation value of the terminal equipment according to the equipment state information and a preset attenuation rule, and calibrating the estimated attenuation value in combination with a historical transmission success rate of the terminal equipment; the calibrated presumed attenuation value is included in uplink budget evaluation of the terminal equipment, the influence of the presumed attenuation value on the uplink transmission capability is compensated, and a transmission parameter adjustment instruction is sent to the terminal equipment based on an evaluation result; and the transmission parameter adjustment instruction adjusts the transmission parameter of the terminal equipment based on the presumed attenuation value, so that the terminal equipment is ensured to preferentially apply the adjusted transmission parameter when sending the key data packet, the transmission reliability of the key data packet is ensured, the link performance is optimized, and the defects of the existing mechanism in complex link degradation processing are overcome.

Embodiments of the present disclosure relate to improved uplink operation. A method of communication, comprising: ensuring the orientation of a first type antenna and a second type antenna, wherein the first type antenna and the second type antenna are included in a terminal device, determining whether the terminal device is a radio resource control connected to a cell provided by an access node, the access node being at least partially included in a satellite or relayed by a satellite, and if the terminal device is the radio resource control, estimating a link loss based at least in part on downlink reception measurements obtained using the first type antenna, determining an uplink budget based on the estimated link loss, determining whether the uplink budget is greater than a threshold for a transmit antenna, wherein the transmit antenna is the first type antenna or the second type antenna, and if the uplink budget is greater than the threshold for the transmit antenna, attempting a transmission to the access node using the transmit antenna.

The application discloses a kind of satellite communication resource dynamic scheduling simulation systems, belong to satellite communication simulation and resource scheduling technical field.It includes data processing module, message bus and scheduler.Data processing module is responsible for the initialization of simulation entity and the management of dynamic and static data;Message bus is based on decoupling communication between each module in and out of system based on publish-subscribe mechanism;Scheduler, as the core decision unit, periodically acquires dynamic data, performs link budget calculation to evaluate link quality, and based on the evaluation results and user service requirements, intelligently selects access modes such as satellite mode, dual-active full-rate mode, segmented transmission mode or load balancing optimal mode, and then completes the dynamic allocation and optimization of satellite communication resources.The scheduling results are published in real time through the message bus.The application improves the scalability, adaptability and scheduling capability of the system, and is suitable for the design verification and strategy evaluation of satellite communication system.

The invention discloses a method for calculating wireless monitoring signal loss of an underground infrastructure, and belongs to the technical field of wireless monitoring of the underground infrastructure. According to the method, key parameters such as complex dielectric constants and electric conductivity of underground multilayer media are measured through technologies such as a time domain reflection method and a four-electrode method, and a parameter matrix is constructed through preprocessing such as dispersion correction and temperature and humidity compensation; a total loss model containing multiple components such as free space radiation and medium absorption is established according to a segmented propagation path of a medium layer, and quantitative loss is solved in combination with interface-by-interface reflection / transmission; and subsequently, robust loss calculation is realized through a parameter disturbance set, and a standardized result is output after field actual measurement closed-loop calibration. According to the method, the problem that the signal loss in the underground complex medium environment is difficult to quantify accurately is solved, the calculation consistency and reproducibility are improved, and a reliable quantification basis is provided for engineering decisions such as monitoring network link budget and node deployment.

Systems and methods include receiving inputs comprising a Raman gain target for a Raman amplifier, fiber parameters, and fiber characteristics, each for an optical span; analyzing the inputs with a deep neural network (DNN) having a plurality of layers; providing a plurality of outputs from the DNN; and utilizing the plurality of outputs for a link budget calculation on the optical span. The Raman amplifier includes a plurality of pumps each at a fixed wavelength.

The invention discloses an underground infrastructure wireless monitoring sensing equipment laying method, and belongs to the technical field of underground infrastructure wireless monitoring. The method comprises the following steps: firstly, acquiring spatial distribution of a propagation loss estimation value of a target area, and setting a maximum allowable attenuation threshold, a link budget margin and a maximum relay hop count; dividing into I-level, II-level and III-level regions; a layout strategy is formulated in a grading manner based on a multi-objective optimization principle, monitoring point positions are directly arranged in a level-I region according to an optimization interval, a level-II region is arranged in a differentiated manner in a general position and a key position, and a level-III region adopts a progressive convergence strategy to iteratively determine a relay position and a distance of each hop; finally, a layout scheme containing parameters such as sensor node spacing and relay positions is output, and the transmitting power and / or the working frequency band can be dynamically adjusted by actually measuring the link quality. Through hierarchical layout and dynamic optimization, connectivity, reliability and energy efficiency of an underground wireless monitoring network are improved, and end-to-end time delay is reduced.

The invention discloses a universal capacity simulation system and method based on space-based short message spread spectrum measurement and control, belongs to the technical field of satellite communication, solves the problem that interference and conflicts among shared code channel users in a multiple access system affect user capacity calculation, and aims at performing simulation modeling on user satellites and dynamically simulating constellation configuration of low-orbit satellites. The service arrival time is simulated by establishing a service model, so that the design requirements of different low-orbit satellite systems are met; the transmitting power is dynamically adjusted based on the link budget, and the power difference of the user signal reaching the high-orbit satellite is balanced; the method comprises the following steps: performing simulation modeling on a high-orbit satellite based on antenna characteristics, and simulating all user channels by integrating various link conditions; according to the method, the interference and conflict conditions among the shared code channel users in the multiple access system are further quantitatively analyzed, the comprehensive influence of the multi-dimensional interference on the signal-to-noise ratio is quantified, and finally the user capacity corresponding to a certain sending success rate is obtained, so that the scientificity of decision making in system construction is improved, and the risk of system construction is reduced.

Certain aspects of the present disclosure relate to beam selection. An example method generally includes selecting, from a plurality of beams, a beam for uplink transmission during a particular time interval, the selecting being based on a transmission power and a radio frequency (RF) exposure for each of the plurality of beams and transmitting at least one uplink signal using the selected beam during the particular time interval.

In the NB-IoT NTN deployment, the coverage area can be as large as hundreds of thousand square kilometers. In such huge geography area, the number of IoT devices that need to access the satellite will be massive. In another hand, the UL capability of NB-IoT is severely suppressed by large repetition number due to the limited link budget. To enlarge the uplink system capacity, RACH-less Early Data Transmission (EDT) is proposed as a 3GPP Release 19 IoT NTN work item. The legacy EDT is to transmit the user data on the Msg3 of the random access. The RACH-less EDT refers to an EDT transmission without Msg1 and Random Access Response (i.e., RAR or Msg2). This invention comprises various methods of supporting RACH-less EDT such as conditions of initiating RACH-less EDT and the processes for RACH-less EDT.

The apparatus may be a wireless device (e.g., a UE) or a component thereof configured to obtain a flexible resource block (FRB) configuration for a FRB comprising a set of activated resource elements (REs) associated with the FRB configuration in each of a plurality of physical resource blocks (PRBs) and receive, based on the FRB configuration, a transmission via at least one FRB. The apparatus may be a network node (e.g., a satellite or other network device associated with a NTN) or a component thereof configured to transmit a FRB configuration for a FRB comprising a set of activated REs associated with the FRB configuration in each of a plurality of PRBs and transmit, based on the FRB configuration, a transmission via at least the FRB.

The present invention discloses an uplink coverage enhancement method in a 5G mobile communication system, mainly solving the problem that the uplink coverage distance in the prior art is insufficient, resulting in the interruption of communication transmission. The solution is as follows: configure the working frequency band available for the terminal; perform link budget to obtain the maximum allowable path loss; send a detection signal in the high-frequency band, detect the signal-to-noise ratio and received power information, and calculate the proportion of the tap energy of the direct path in the total energy of all paths and the path loss; the base station selects the uplink data transmission frequency band according to the initial detection result and timely feedbacks the selection result to the user; track the uplink coverage status under high-frequency band communication; when the initial detection time interval reaches a cycle, the user sends a detection signal again, the base station selects the uplink data transmission frequency band according to the detection status and feedbacks it to the user, and the user timely performs frequency band switching. The present invention enhances the uplink coverage and improves the performance of 5G uplink data transmission, and can be used for wireless communication.

The invention provides a communication method and device. The method comprises: a first communication device receiving a first signal on a beam corresponding to a first beam position, then sending a second signal by using a first group of random access resources corresponding to a first sub-beam position, and then receiving a third signal on a sub-beam corresponding to the first sub-beam position, the first signal being used for indicating at least one sub-beam position, and the second signal being used for indicating at least one sub-beam position; the at least one sub-beam position is included in a first beam position, the at least one sub-beam position can respectively correspond to a group of random access resources, and the first sub-beam position is a sub-beam position where the first communication device is located. The second signal is sent by using the first group of random access resources corresponding to the first sub-wave position, so that the receiving device can effectively determine that the first communication device is located at the first sub-wave position according to the first group of random access resources; therefore, the receiving device can further timely and effectively schedule the sub-beam corresponding to the first sub-beam position to send the third signal, and the link budget of the public downlink signal can be improved.

The invention provides an urban rail transit multi-system fusion wireless coverage system and a control method, and relates to the technical field of communication transmission, and the system comprises a central network management device, a machine room multi-system fusion device, a multi-system fusion wireless terminal device and a full-band antenna which are connected in sequence. Various radio frequency signals can be converted into digital signals, the digital signals and WIFI signals are integrated through a three-layer switching module, unified output of digital optical signals is achieved, and the digital optical signals are connected to multi-system fusion wireless terminal equipment through a wired link. Digital optical signals are converted into required wireless signals of various systems through the multi-system fusion wireless terminal, and multi-system fusion wireless coverage is achieved through the multi-band antenna. According to the method, complex wireless link budget is avoided, and the deployment efficiency of the urban rail transit wireless system is improved; the problems of resource waste and disordered arrangement of equipment terminals caused by repeated construction of an urban rail transit wireless system are solved.

Wireless device transmissions to non-terrestrial networks face challenges due to limited link budgets, at least at mid-band Personal Communications Service (PCS) or Advanced Wireless Services (AWS) frequencies. An example solution includes a method that involves causing a wireless device that is classified or capable of a first power class to instead use a second power class (having a lower maximum transmit power) by default while operating in a terrestrial communication mode. Upon a transition from the terrestrial mode to a non-terrestrial mode (e.g., a satellite mode), the wireless device evaluates its connection with a non-terrestrial network with non-terrestrial nodes. If the evaluated connection does not meet certain success thresholds, the wireless device dynamically switches to the first power class to improve its connection to the non-terrestrial network. The flexibility in power class configuration for a wireless device uniquely allows a device to handle communications with terrestrial and non-terrestrial networks.

This application relates to a method and apparatus for controlling the EIRP of a phased array antenna. The control method includes: calculating the baseline EIRP of the phased array antenna in real time based on the link budget of a low-orbit satellite and the characteristics of the phased array antenna; calculating the link loss within the beam range of the phased array antenna in real time; calculating the carrier-to-noise ratio of the EIRP transmitted by the phased array antenna in real time; calculating the off-axis EIRP attenuation of the phased array antenna; and adjusting the EIRP value transmitted by the phased array antenna in real time based on the received satellite signal strength.

The invention discloses a high-speed satellite-ground laser communication system and method with a strong turbulence resistance characteristic, and the system is characterized in that an optical signal generation unit divides to-be-transmitted electric data into two paths through a splitter, inputs the electric data into a serial-to-parallel conversion module and a DPPM coding module for modulation, and outputs the electric data to a Mach-Zehnder modulator to form a joint modulation laser signal; the transmitting antenna communicates with the receiving unit through a satellite-ground atmosphere channel; the optical signal receiving unit receives signals through the receiving antenna, the signals are split by the beam splitter to the DQPSK demodulation module and the DPPM demodulation module to be demodulated and amplified respectively, and then the signals are output through the combiner. The optical signal receiving unit has the application advantages of being high in turbulence resistance and data rate, improving the power utilization rate of the data transmitting end and the like, does not need carrier recovery and an AO system, and is simple in structure and convenient to use. The power consumption of a space platform is saved, the complexity and the cost of the system are reduced, and the link budget and the spectrum efficiency of the system can be improved under the strong turbulence condition of an atmospheric channel.

The disclosed technology is generally directed to a method for determining link budget of a satellite system including at least one satellite. In one example of the technology, the method may include receiving orientation and antenna parameters associated with the satellite, and user equipment parameters associated with multiple user equipment within coverage area of the satellite and environmental parameters. The method may include selecting at least one of a plurality of analysis techniques to process the orientation, antenna, user equipment, and environmental parameters and simulating, via a parallel processor, link budgets of the satellite for the multiple user equipment in parallel using the selected analysis technique to determine link budgets of the satellite for each user equipment. The method may include storing the link budgets in a buffer and dynamically rendering a user interface to display a visualization representing the link budgets in the coverage area of the satellite.

The application discloses a kind of underground infrastructure wireless monitoring sensing device layout method, belong to underground infrastructure wireless monitoring technical field.The method includes: first, the spatial distribution of target area propagation loss estimation value is obtained, and maximum allowed attenuation threshold, link budget margin and maximum relay hop number are set;Subsequently, Ⅰ, Ⅱ, Ⅲ level area is divided;Based on the principle of multi-objective optimization, layout strategy is formulated in stages, Ⅰ level area is directly laid according to the optimized spacing monitoring point, Ⅱ level area is differentially laid according to general position and key position, Ⅲ level area uses progressive convergence strategy to determine relay position and distance per hop iteratively;Finally, the layout scheme containing sensor node spacing, relay position and other parameters is output, and transmission power and / or operating frequency band can also be dynamically adjusted by measured link quality.The present application improves the connectivity, reliability and energy efficiency of underground wireless monitoring network through hierarchical layout and dynamic optimization, and reduces end-to-end delay.

The invention discloses an ORU forward transmission power scaling system suitable for ORAN equipment. The ORAN system comprises a digital unit (DU), a data processing unit (DU) and a data processing unit (DU), wherein the digital unit (DU) is responsible for IQ data generation, M plane parameter configuration and a multi-carrier power distribution strategy; the radio frequency unit (RU) comprises a processor, a memory and a radio frequency module; the processor is used for executing a power scaling algorithm and analyzing an M-plane message; the memory is used for storing the HWDB and the SWDB; and the radio frequency module realizes analog signal conditioning and digital signal conversion through DSA, PA and ADC / DAC. According to the invention, the compatibility is improved: two IQ formats of fixed RE power of the DU and ORAN standard normalization are supported, and flexible adaptation is realized through FSOffset parameters; the power control precision is as follows: the downlink power adjustment error is less than or equal to + / -0.5 dB, and the noise coefficient of an uplink is optimized to be more than 3dB; multi-carrier reliability: hardware overload is avoided through a total power verification mechanism, and a scene of at most 8 carrier aggregation is supported; and dynamic adaptability: the M plane can adjust gain correction parameters in real time to adapt to link budget changes in different environments.