35 results about "Satellite mobile communication" patented technology

The invention discloses a low-orbit satellite communication terminal power consumption optimization method, and relates to the technical field of satellite mobile communication and wireless communication terminal power consumption management. A candidate set is generated based on satellite ephemeris and shielding information, so that a terminal only scans a limited frequency band, and energy waste caused by full-frequency-band blind scanning is fundamentally avoided; in a dense urban scene, signal interruption is caused by high-rise buildings, and a traditional terminal needs to repeatedly scan to maintain connection, however, a predictive scanning mechanism of the method can activate scanning in advance before signal attenuation and reduce response delay, so that a power consumption curve is smoothed, and a power consumption peak value caused by sudden switching is avoided; secondly, the energy consumption perceptual sorting mechanism dynamically evaluates the power consumption performance of the candidate satellites through historical data and context features, and preferentially selects low-energy-consumption options, so that the scanning process is more targeted.

The invention relates to a satellite mobile communication antenna adaptive beam prediction and control method, which comprises the following steps: acquiring motion data of a user terminal, signal state data of a satellite antenna receiving end, satellite-ground attitude data of a satellite and environment interference data of the ground, and processing to obtain a multi-source data set; the method comprises the following steps: constructing a geometric correlation feature, a gain correlation feature, a sidelobe correlation feature and an array element phase correlation feature of a multi-source data set and beam parameters, constructing a correlation matrix, and splicing the correlation matrix with the multi-source data set to obtain a complete input feature set; a beam prediction model is constructed, and training and verification are carried out; and converting the output of the beam prediction model into a control signal to drive an antenna array element to adjust, correcting model parameters based on the link signal-to-noise ratio, the bit error rate and the throughput collected by the user terminal, and splitting / combining the beam. According to the method, the beam parameter prediction precision and environment adaptability can be improved, interference is suppressed, resource allocation is optimized, and stability and high efficiency of satellite communication in a high-dynamic complex environment are guaranteed.

The application discloses a satellite switching coordination prediction method for interference avoidance, and relates to the technical field of satellite mobile communication.The application comprises the following steps: after receiving the interference avoidance instruction of a ground network control center, a service satellite precalculates a differentiated switching advance for a terminal according to the antenna type and service quality level of the terminal; then, the inter-satellite link is used to acquire the predicted coverage time window and load state of a neighboring satellite for the area where the satellite terminal is located, and a comprehensive score is obtained; and finally, at the switching trigger moment, the satellite terminal is switched to the neighboring satellite with the highest comprehensive score, so that the target satellite can provide continuous and stable service in the subsequent period of time, and the risk of'secondary switching' caused by the subsequent interference avoidance of the target satellite is effectively avoided.The application significantly improves the continuity of high-priority services and the overall resource utilization efficiency of the system by deeply coordinating the management of the interference avoidance plan and the switching mechanism.

The invention provides a data transmission method, terminal equipment, network equipment and a storage medium, and relates to the technical field of communication. The method comprises the following steps: determining indication information; performing data transmission in the first time unit according to the indication information; wherein the indication information is used for indicating pattern information adopted by the terminal equipment, the first time unit is located in a second time unit, and the second time unit is a time unit in a satellite mobile communication system. And the condition of communication interference caused by simultaneous uplink transmission and downlink transmission is avoided. And the communication effect is improved.

The present disclosure provides a multi-mode satellite mobile communication uplink signal real-time detection and identification method and system. Applied to the field of satellite mobile communication technology, the method comprises: performing wideband sampling on the obtained received signal to obtain sampling data, performing signal carrier detection on the sampling data, judging whether the sampling data contains a target signal, and if so, proceeding to the next step; performing channelization processing on the sampling data to obtain narrowband signals in different satellite system corresponding narrowband channels; performing TDMA signal detection on the narrowband signals to obtain signal specifications, wherein the TDMA signal detection comprises energy detection, correlation detection, and signal identification. The present disclosure has the advantages of: significantly improving the accurate identification capability of various satellite mobile communication terminal uplink signals, with a detection and identification accuracy of 99%; and the hardware cost of the present disclosure increases little, and has a low-cost application prospect.

The application belongs to the field of satellite mobile communication, and specifically provides a wide-beam metal-resistant antenna for satellite communication to overcome the problem that communication is interrupted under the interference of a metal environment for the existing satellite communication antenna. The application adopts a design of laminated slot coupling feed, improves the back and forward radiation of the antenna through a metal reflector plate and a forward radiation plate to improve the gain, generates 90 degrees of self-phase shift through a Wilkinson power divider, feeds a rotationally symmetrical "H" type slot at the same time, introduces a metal aluminum ring to pre-compensate the metal environment, reduces the influence of the surrounding metal floor on the antenna, and the metal reflector plate and the conductive metal aluminum ring together form a magnetic dipole, which is complementary to the directional diagram of the feed plate as an electrode to widen the lobe and improve the gain at a low elevation angle. Furthermore, the application has the advantages of wide beam, good low-elevation circular polarization performance and metal resistance, and is more suitable for satellite communication in actual scenarios.

The application is a satellite 5G large dynamic high-speed transmission real-time receiving and time synchronization method and system based on FPGA, and belongs to the technical field of wireless communication.The system is provided with a real-time receiving module, a time synchronization module and the like at the receiving end of a satellite-ground transmission link.The method comprises the following steps: the receiving end stores data into a DDR3 in real time by using an asynchronous FIFO, and performs time synchronization once every transmission half-frame signal;the starting point of a symbol is calculated in a multi-symbol combination mode, the content of each symbol is obtained according to the starting point of the symbol, a correlation value is calculated according to a known PSS sequence, the starting point of the half-frame signal is obtained, and subsequent CP removal and demodulation operations are continuously performed;the application solves the problem of timing synchronization difficulty caused by large time delay and large frequency offset, realizes low complexity and timing synchronization error not affected by carrier frequency offset under the premise of ensuring accuracy, and can be used for the time synchronization process of a satellite mobile communication system with large dynamic frequency offset.

The invention discloses a beam resource dynamic allocation method of a satellite communication system, and belongs to a satellite mobile communication method. The method comprises the following steps: scheduling a service beam to carry out resource allocation by taking a beam position as a unit based on the current beam resource of a satellite, the state and priority of an access terminal and the like. A connected terminal, a new access terminal and a resource transformation terminal can be called non-reserved resource terminals, and only non-reserved wave positions can be allocated. And the reserved resource terminal can only allocate reserved wave positions. The beam management module analyzes and processes the beam resource state when receiving the service request, and releases and adjusts the terminal under the beam; and then, according to a beam allocation strategy of staring first and then dynamic, allocation processing of reserved resource terminals is carried out first, and then allocation processing of non-reserved resource terminals is carried out. According to the invention, factors such as different wave beam states, different terminal states, priority and continuity of terminal allocation and the like under the same satellite can be fully considered, the utilization efficiency of wave beam resources is improved, and the system performance is improved.

The invention provides a multi-standard satellite mobile communication uplink signal real-time detection and identification method and system. The method is applied to the technical field of satellite mobile communication, and comprises the following steps: carrying out broadband sampling on an obtained receiving signal to obtain sampling data, carrying out signal carrier detection on the sampling data, judging whether the sampling data contains a target signal or not, and if so, entering the next step; carrying out channelization processing on the sampling data to obtain narrowband signals in narrowband channels corresponding to different satellite systems; and performing TDMA signal detection on the narrowband signal to obtain a signal specification, wherein the TDMA signal detection comprises energy detection, correlation detection and signal identification. The method has the advantages that the capability of accurately recognizing uplink signals of various satellite mobile communication terminals is remarkably improved, and the detection and recognition accuracy reaches 99%; the hardware cost is not increased much, and the method has a low-cost application prospect.

The application provides a multi-user cooperative communication system and method based on satellite mobile communication. The system comprises: a gateway station receiving various types of information sent by corresponding user terminals through satellite mobile communication connection and sending the information to an information transmission service module; the information transmission service module sending the information to a multi-user cooperative communication service module; sending a service request to the multi-user cooperative communication service module; the multi-user cooperative communication service module receiving the information; sending corresponding information to corresponding user terminals according to the service request; the user terminals sending various types of information and service requests to the gateway station, receiving service information fed back by the multi-user cooperative communication service module through the gateway station and forwarding the service information to other user terminals in corresponding groups; and a data monitoring center monitoring and obtaining the information received by the multi-user cooperative communication service module and the service information fed back. The system can adapt to various scenes and meet efficient communication among user groups in a small range.

The invention provides a satellite mobile communication test system, method, device, equipment, medium and program. The system comprises measurement and control station equipment, a satellite base station, terminal equipment and core network equipment, the measurement and control station equipment, the satellite base station and the core network equipment are all deployed on the ground, and the terminal equipment is deployed on a satellite orbit; the measurement and control station equipment is used for sending a test instruction to the terminal equipment, receiving performance observation data which is returned by the terminal equipment after executing the test instruction and aims at the wireless communication link between the terminal equipment and the satellite base station, and determining the performance of the wireless communication link according to the performance observation data; the terminal equipment is used for executing the test instruction and performing communication test on the satellite base station to obtain performance observation data of the wireless communication link; the satellite base station is used for cooperating with the terminal equipment to execute the test instruction; and the core network equipment is used for providing communication service required by the satellite base station. The communication test scheme implemented based on the satellite mobile communication test system has the effects of high channel fidelity, low deployment cost and short test period.

The application discloses a kind of satellite mobile communication system adaptive power control methods, this method is: first, the current service channel signal and noise ratio is measured to the service channel burst of local end and predicts the channel quality after long delay;Then local end enters closed loop power control procedure, judge whether to the receiving opportunity of power control channel along with road, if to the power control channel along with road opportunity, then calculate the attenuation value of transmitting power of opposite end, the attenuation value of transmitting power of local end is calculated using closed loop power control;Then using open loop power control correction local end this time transmitting power;Finally, according to the lower limit of system set transmitting power value and the upper limit of transmitting power value, the amplitude limiting and quantization of local end this time transmitting power are carried out, and the transmitting power level is set according to the power of quantization.The application improves the performance of satellite mobile communication system power control, improves system communication capacity and communication quality.

The invention discloses a low-orbit phased array terminal satellite capture and inertial navigation real-time calibration method, device and system and a medium, and belongs to the field of satellite mobile communication, and the method comprises the following steps: after a satellite is successfully captured and stabilized, an antenna enters a satellite tracking state, and inertial navigation data is continuously calibrated in the tracking state; wherein the phased-array antenna is divided into four array planes, namely an A array plane, a B array plane, a C array plane and a D array plane, and the receiving powers of the four array planes respectively correspond to the power PA, the power PB, the power PC and the power PD; the antenna is provided with four power detection circuits which are used for detecting the combined receiving power of the four array plane combinations, the combined receiving power corresponds to PA and PB, PC and PD, PA and PC, PB and PD, and the antenna beam pointing error is calculated and corrected. According to the invention, the attitude data can be calibrated in real time by receiving the signal, so that the cost and the design complexity of the phased-array antenna are reduced.

The embodiment of the invention provides a satellite mobile communication simulation method and device, equipment, a medium and a program product. The method comprises the following steps: acquiring population information and geographic information of a target area; obtaining the total number of simulation terminals deployed in the target area; determining at least one simulation terminal deployment scheme according to the population information, the geographic information and the total number of simulation terminals; the simulation terminal deployment scheme comprises geographical coordinate information corresponding to each simulation terminal; and performing a simulation test on the to-be-tested satellite mobile communication system based on the at least one simulation terminal deployment scheme to obtain a simulation test result. According to the method, by combining the demographic distribution proportion with the geographic information, a simulation terminal deployment scheme which better conforms to the user distribution characteristics is constructed, and the credibility and the accuracy of an interference simulation result are remarkably improved.

The application relates to a satellite mobile communication antenna adaptive beam prediction and control method, which comprises the following steps: collecting motion data of a user terminal, signal state data of a satellite antenna receiving end, satellite star-ground attitude data and ground environmental interference data, and processing to obtain a multi-source data set; based on the geometric correlation characteristics, gain correlation characteristics, sidelobe correlation characteristics and array element phase correlation characteristics of the multi-source data set and beam parameters, an associated matrix is constructed, the associated matrix is spliced with the multi-source data set, and a complete input feature set is obtained; a beam prediction model is constructed, and training and verification are performed; the beam prediction model output is converted into a control signal to drive the antenna array element adjustment, and based on the link signal-to-noise ratio, the bit error rate and the throughput collected by the user terminal, the model parameters are corrected, and the beam is split / combined. The application can improve the beam parameter prediction accuracy and environmental adaptability, suppress interference, optimize resource allocation, and guarantee stable and efficient satellite communication in a high dynamic complex environment.

The application provides a low-orbit satellite mobile communication ground experiment method and system. According to the influence of different orbit heights and solar activity periods, a diversified orbit parameter set is planned to generate a virtual satellite network model; based on the virtual satellite network model, an optimal transmission path is calculated by using a path prediction algorithm, the characteristics of the transmitted signal are adjusted through real-time channel simulation technology, and a low-orbit satellite communication environment test scene is generated; based on the low-orbit satellite communication environment test scene, a self-adaptive performance evaluation algorithm is used to evaluate communication performance data, an energy efficiency optimization method is used to determine a power consumption mode, the relationship between battery consumption and communication quality is analyzed, and a performance evaluation report is generated; the power consumption data and the communication quality data are integrated, and after integration, the integrated data are converted into a practical solution, and a low-orbit satellite mobile communication ground experiment result is generated. The technical scheme provided by the application improves the comprehensiveness and practicality of the low-orbit satellite mobile communication ground experiment method.

The invention belongs to the technical field of communication, and particularly relates to a method comprising the following steps: S1, signal acquisition: on a satellite load side, acquiring a real-time position coordinate, a running speed vector and a carrier frequency of a satellite through a satellite-borne sensor and a communication link of the satellite; and S2, beam angle acquisition: according to the geographic position information of the ground-based beam center point, calculating to obtain an azimuth angle and a pitch angle of a satellite beam pointing to the center point by means of a space geometrical relationship between the satellite and the ground-based beam center point. According to the invention, the design of obtaining geographic position information by depending on a terminal GNSS module in the prior art is abandoned, and the time-frequency deviation is calculated by using the relative position relationship between the satellite and the ground-based beam center point, so that the influence of signal shielding, interference or fault of the GNSS system on the satellite communication system is avoided fundamentally; the continuity and the stability of the time-frequency compensation function of the satellite-ground transmission link are ensured, and the anti-interference capability and the operation reliability of a satellite mobile communication system are greatly improved.

The present application relates to a kind of low-orbit satellite switching methods based on double activation protocol stack, belong to satellite mobile communication technical field.The method includes: in low-orbit satellite network environment, design with the average rate of user equipment maximization and the switching interruption delay minimization as optimization target's switching architecture based on double activation protocol stack, and establish original optimization problem;Establish low-orbit satellite network multi-stage switching mechanism;Based on the multi-stage switching mechanism established, original optimization problem is decomposed into bandwidth allocation sub-problem and switching strategy sub-problem;Bandwidth allocation sub-problem is solved using alternate direction multiplier method;Switching strategy sub-problem is solved using simulated annealing algorithm;The final optimal solution is obtained by combining the solving results of bandwidth allocation sub-problem and switching strategy sub-problem.The present application can effectively deal with the challenge of frequent satellite switching and limited satellite resources in satellite network, while realizing high-speed, seamless connection, and improving user experience.

The invention discloses a satellite mobile communication system multi-broadcast frequency point parallel search method and device, and the method comprises the steps: obtaining a satellite digital intermediate frequency signal containing a plurality of target frequency bands, carrying out the digital down-conversion processing of the intermediate frequency signal through employing multiple channels, obtaining a baseband signal corresponding to each target frequency band, and transmitting the baseband signal to a receiver; performing cross-correlation operation on the baseband signal after downsampling and filtering processing and a local broadcast signal; and performing frequency domain transformation on a cross-correlation operation result, determining the maximum amplitude and the signal-to-noise ratio in the frequency domain data of each channel, screening the effectiveness of each channel according to the signal-to-noise ratio, and determining the position of the satellite by taking the beam direction corresponding to the maximum amplitude in the effective channel as the incoming wave direction of the broadcast signal. The real-time performance of signal searching in the multi-frequency-point environment is improved, the high signal detection capacity and anti-interference performance are shown in the complex electromagnetic environment, and the method has the advantages of being small in resource consumption, high in operation speed, stable in searching result and good in universality.

The invention provides a cell reselection method and device, user equipment, a storage medium and a program product, relates to the technical field of satellite mobile communication, and is used for saving the energy consumption of the UE while ensuring that the UE triggers cell reselection in time. The method comprises: when a UE resides in a first cell and the UE is in an RRC idle state or an RRC inactive state, acquiring first information, the first information comprising at least one of the following items: related information of the UE, related information of a second cell, the first cell being an NTN cell or a TN cell, the first cell and the second cell being the same cell or different cells, and the first cell being the same cell or different cells; the NTN cell is a ground quasi-static cell of which the ground coverage range periodically changes; on the basis of the first information, at least one moment for triggering cell reselection is obtained through calculation; and at a first moment, triggering the cell reselection, the first moment being the earliest moment in the at least one moment for triggering the cell reselection. The present application is applied to a scene of cell reselection.

In a non-geostationary orbit (NGSO) satellite mobile communication system, a communication device receives a synchronization signal block (SSB), which is subjected to partial pre-compensation, from an NGSO satellite transmitter through a downlink (DL) beam, and then transmits the received synchronization signal block (SSB) to the NGSO satellite transmitter through the downlink (DL) beam. And realizing cell synchronization with the NGSO satellite transmitter by using the SSB subjected to partial pre-compensation. A center frequency of a primary synchronization signal and a center frequency of a secondary synchronization signal within the partially pre-compensated SSB are pre-offset by the NGSO satellite transmitter by an integer number of subcarriers relative to a center frequency of the partially pre-compensated SSB to achieve a correlation with movement of the NGSO satellite transmitter relative to the coverage on the earth of the DL beam According to the method, partial pre-compensation of Doppler shift (DS) is carried out. Even if Doppler frequency offset is large due to high mobility of an NGSO satellite, cell synchronization can be simplified.

The application provides a beam switching method, device and satellite mobile communication system, wherein a satellite terminal in the satellite mobile communication system has a first service communication module and a second service communication module. In the case that the first service communication module of the satellite terminal establishes a first service channel with an access network based on a first beam, if the satellite terminal detects that the satellite terminal is in a beam overlapping area of multiple beams, a second beam to be switched to is determined from the multiple beams; a second service channel is established with the access network based on the second beam through the second service communication module, and if the satellite terminal confirms that the second service channel has been successfully established, the first service channel between the first service communication module and the access network is released. The scheme of the application can improve the beam switching success rate.

The application discloses a low-orbit satellite communication system time-frequency estimation method based on differential pilots, utilizes the good autocorrelation characteristics and the lower cross-correlation characteristics of a ZC sequence, designs a time-domain differential pilot sequence to solve the problems of large frequency offset estimation and timing synchronization in low-orbit satellite communication, and has the advantages of large frequency offset estimation range, no interference between frequency offset estimation and timing estimation, fast initial frequency offset estimation and timing estimation, and subsequent residual frequency offset estimation by using an M-PART algorithm, so as to meet the requirements of a low-orbit satellite mobile communication system on the frequency offset estimation range and precision. The differential design pilot sequence and the time-frequency estimation method based on the pilot sequence have the advantages that the estimation precision of the frequency offset is improved by 2-4 dB compared with the traditional M-PART method, the frequency offset estimation range is much better than that of the traditional method, the design requirements of the low-orbit satellite system are met, and the method has high practical value.

One disclosure of the present specification provides a method. The method may comprise the steps of: transmitting capability information to a base station included in a satellite; receiving, from the base station, information related to two or more SMTCs; and performing measurement on the basis of the two or more SMTCs.

The invention discloses a dynamic resource scheduling method of a satellite Internet of Things system, and relates to a wireless resource management technology in the field of satellite mobile communication. According to the method, how the satellite-borne base station allocates the time domain resources to the satellite terminals occupying the same frequency domain resources is described in detail. Efficient utilization of channel resources is realized mainly through a mechanism of periodic scheduling, distribution as required and scheduling information issuing. The method can be applied to a satellite Internet of Things system, is especially suitable for an emergent service scene, and can flexibly and dynamically adjust the allocation of the wireless resources according to the user number and the service volume of the current access terminal while reducing the pressure of a satellite platform, thereby improving the utilization rate of the space wireless resources and expanding the system capacity.

The invention discloses a paging method of a low earth orbit satellite system based on a wave position, and relates to the technical field of satellite mobile communication. The invention describes a network element deployment and process design method for paging in a low-orbit satellite system in detail. A paging area is delimited based on the geographic position of a terminal, paging is sent at a service beam position corresponding to the paging area, and meanwhile signaling beam paging is sent at a signaling beam position corresponding to the paging area. Through precise paging of the service beam and wide paging of the signaling beam, it is ensured that the terminal can receive the paging message no matter the terminal resides in the signaling beam or the service beam, and the paging success rate is improved. The method can be applied to a low-orbit satellite system paging scene, and the paging success rate can be effectively improved.

A satellite mobile communication device and a satellite communication system. The satellite mobile communication device includes a base seat, a first control circuit, a first antenna module, a first connection module, and a top cover. The first control circuit is disposed on the base seat. The first antenna module is disposed on a side of the first control circuit, and is electrically connected to the first control circuit. The first connection module is connected to the first control circuit. A first predetermined distance is defined between the first control circuit and the first antenna module. The top cover is disposed on the base seat. The first connection module is connected to the satellite communication circuit.

The invention provides a cell reselection method and device, user equipment, a storage medium and a program product, relates to the technical field of satellite mobile communication, and is used for saving the energy consumption of the UE while ensuring that the UE triggers cell reselection in time. The method comprises the following steps: under the condition that UE resides in a first cell, determining a first distance between the position of the UE and the area center position of the first cell based on the position of the UE at the middle moment of a first time period after the current moment and the area center position of the first cell; on the basis of the first distance and the area radius of the first cell, a second moment is obtained through calculation by adopting an iterative algorithm; triggering cell reselection based on the second moment; when the first cell is an NTN cell, the first time period is the longest service time period of the service satellite for serving the first cell from the current moment, and when the first cell is a TN cell, the first time period is the time period required by the UE to reach the first position point after moving a first distance from the current position. The present application is applied to a scene of cell reselection.

The invention provides an information communication system and method based on satellite mobile communication. The system comprises a gateway station which is used for receiving processing information of a user terminal through satellite mobile communication connection with the user terminal and sending the processing information to different data adaptation and access equipment of an information network application platform; the data adaptation and access equipment is used for receiving the processing information, analyzing the processing information and sending the analyzed application data to the application service equipment of the corresponding class; the application service equipment of the information network application platform is used for processing and storing the received application data of the corresponding class; and the data monitoring center is used for monitoring and acquiring target data in the application service equipment executing different types of application services. The system enhances the service diversity and improves the resource utilization rate.

The invention provides a communication situation sharing system and method based on satellite mobile communication. The system comprises a function management service layer used for monitoring information in a gateway station; the service information in the gateway station is managed, and based on the received service demand, target service information meeting the service demand in the managed service information is acquired; the interface interaction layer provides a communication interface between the function management service layer and a gateway station; and the front-end interaction layer provides an interaction interface for receiving business requirements, monitoring information in the gateway station and managing data, and displays the business information acquired by the function management service layer on the interaction interface. According to the system, the user terminal and the gateway station are connected through the satellite mobile communication system, so that sharing of communication situation information can be realized even if ground communication infrastructures are unavailable, and the communication reliability and coverage range are greatly improved.