WO2024056036A1 - Procédé de communication et appareil de communication pour système de communication par satellite - Google Patents

Procédé de communication et appareil de communication pour système de communication par satellite Download PDF

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Publication number
WO2024056036A1
WO2024056036A1 PCT/CN2023/118899 CN2023118899W WO2024056036A1 WO 2024056036 A1 WO2024056036 A1 WO 2024056036A1 CN 2023118899 W CN2023118899 W CN 2023118899W WO 2024056036 A1 WO2024056036 A1 WO 2024056036A1
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WIPO (PCT)
Prior art keywords
satellite
terminal device
communication
target
carrier
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PCT/CN2023/118899
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English (en)
Chinese (zh)
Inventor
欧松林
胡建悦
黄欣
杨沛
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华为技术有限公司
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Publication of WO2024056036A1 publication Critical patent/WO2024056036A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information

Definitions

  • the present application relates to the field of wireless communications, and in particular, to a communication method and communication device of a satellite communication system.
  • Satellite radio determination service is a unique service function of BeiDou navigation satellite system (BDS), which can provide two-way short message services through satellite signals. After the Beidou first generation was completed in 2000, the Beidou satellite navigation system has this function.
  • BDS BeiDou navigation satellite system
  • the basic principle of Beidou RDSS business is shown in Figure 1: When users need short message communication services, they use terminals to send signals to satellites through uplinks, and the satellites send signals to the ground center through downlinks. The ground center receives satellite signals, processes user information and sends it to the satellite through an uplink. The satellite then forwards positioning and communication information to the terminal via downlink.
  • Beidou-3 completed global networking and officially provided civilian services such as regional short message communication (RSMC) and global short message communication (GSMC).
  • RSMC regional short message communication
  • GSMC global short message communication
  • RDSS chips and terminals Judging from the development history of RDSS chips and terminals, in the early days, they were mainly independently designed chips related to RDSS functions, which can realize active two-way ranging two-dimensional navigation and short message communication functions.
  • RDSS chip Although there is a separate RDSS chip, subsequent chips integrate RNSS and RDSS signal processing technologies to simultaneously implement RNSS and RDSS services within a single chip, which helps reduce terminal integration costs.
  • the RNSS/RDSS chip can realize the organic combination of multi-mode navigation and position reporting, and can forward precise positioning results to designated users through satellites without being restricted by geographical and natural conditions. It plays a huge role in the fields of rescue and disaster relief, fishing vessel operations and other fields.
  • Embodiments of the present application provide a communication method and communication device of a satellite communication system, which are used to quickly find target satellites that can be used to transmit signals of the satellite communication system, so as to improve the efficiency of satellite communication.
  • embodiments of the present application provide a communication method for a satellite communication system, including:
  • the terminal device receives a satellite navigation system signal sent through at least one satellite; the terminal device determines a carrier-to-noise ratio corresponding to each satellite in the at least one satellite based on the satellite navigation system signal sent through at least one satellite; The terminal device selects a target satellite from the at least one satellite according to the carrier-to-noise ratio corresponding to the at least one satellite; the terminal device transmits satellite communication system signals through the target satellite.
  • the same satellite can send both satellite navigation system signals and satellite communication system signals. Therefore, the communication environment and communication quality of satellite navigation system signals and satellite communication system signals are similar. Therefore, the terminal device can select the target satellite for transmitting the satellite communication system signal according to the carrier-to-noise ratio of the satellite navigation system signal.
  • the satellite communication system signal transmission function of the terminal device is not always on, but the satellite navigation system signal transmission function is. In this case, the above-mentioned assisted selection of the target satellite of the satellite communication system signal based on the satellite navigation system signal is , compared with the traditional solution of traversing all satellites to select the target satellite for the satellite communication system signal, the target satellite can be determined more quickly, reducing the time required to select the target satellite, thereby improving communication efficiency.
  • the method further includes: the terminal device determining the position information of the terminal device relative to the at least one satellite based on the satellite navigation system signal sent through the at least one satellite; The terminal device is based on the at least one The carrier-to-noise ratio corresponding to the satellites, selecting a target satellite from the at least one satellite includes: when there are at least two satellites corresponding to the carrier-to-noise ratio among the carrier-to-noise ratios corresponding to the at least one satellite that meet the communication conditions, The terminal device selects a target satellite from the at least two satellites based on the position information of the terminal device relative to the at least two satellites.
  • the carrier-to-noise ratio is one of the indicators used to indicate communication quality. When the carrier-to-noise ratio is similar and the communication conditions are met, the target satellite can be further selected based on the position information of the terminal device relative to the satellite, which is conducive to selecting a satellite with better communication quality. target satellite.
  • the position information of the terminal device relative to the satellite includes the elevation angle of the terminal device relative to the satellite; the terminal device is based on the elevation angle of the terminal device relative to the at least two satellites.
  • the position information, selecting a target satellite from the at least two satellites includes: the terminal device uses the satellite with the largest elevation angle among the at least two satellites as the target satellite. Generally speaking, the greater the elevation angle, the smaller the probability of being blocked and the better the communication quality. Therefore, the terminal device can use the satellite with the largest elevation angle as the target satellite, which is beneficial to selecting the target satellite with better communication quality.
  • the method further includes: the terminal device determining the position information of the terminal device relative to the target satellite based on the satellite navigation system signal sent through the target satellite; the terminal The device determines the position adjustment strategy of the terminal device based on the position information of the terminal device relative to the target satellite; the terminal device displays the position adjustment strategy.
  • the terminal device can also determine the position adjustment strategy of the terminal device based on the position information of the terminal device relative to the target satellite, so that the user can adjust the position according to the target satellite.
  • the position adjustment strategy helps to obtain better communication quality after adjusting the terminal position.
  • the location information includes the azimuth angle and/or elevation angle of the terminal device relative to the satellite.
  • the method further includes: when the carrier-to-noise ratio corresponding to each satellite in the at least one satellite does not meet the communication conditions, the terminal device transmits the signal through the at least one satellite according to the The satellite navigation system signal determines the position information of the terminal device relative to the at least one satellite; determines the position adjustment strategy of the terminal device based on the position information of the terminal device relative to the at least one satellite; The terminal device displays the location adjustment policy.
  • the terminal device determines the position adjustment strategy of the terminal device based on the position information relative to the satellite, so that the user can adjust the terminal position according to the position adjustment strategy. It helps to receive signals whose carrier-to-noise ratio meets the communication conditions, thereby enabling satellite communication.
  • the terminal device transmits a satellite communication system signal through the target satellite, including: the terminal device receives a satellite communication system signal sent by the target satellite through at least one beam; the terminal device Determine the carrier-to-noise ratio corresponding to each beam in the at least one beam according to the satellite communication system signal transmitted through the at least one beam; the terminal device obtains the signal from the carrier-to-noise ratio based on the carrier-to-noise ratio corresponding to the at least one beam. Select a target beam from at least one beam; the terminal device transmits a satellite communication system signal through the target beam.
  • satellites transmit satellite communication system signals they can also obtain beams with good directivity through satellite beams and improve the carrier-to-noise ratio at the receiving end. In this case, after the terminal device selects the target satellite, it can further select a target beam with a better carrier-to-noise ratio, thereby obtaining better communication quality.
  • the method before determining the carrier-to-noise ratio corresponding to each satellite in the at least one satellite, the method further includes: the terminal device receives a satellite communication instruction, and the satellite communication instruction is used to Instruct the terminal device to enable signal transmission of the satellite communication system; the terminal device determines whether other communication networks currently exist; if the terminal device determines that other communication networks currently exist, prompt the user whether to enable signal transmission of the satellite communication system.
  • the terminal device receives a satellite communication instruction, and the satellite communication instruction is used to Instruct the terminal device to enable signal transmission of the satellite communication system; the terminal device determines whether other communication networks currently exist; if the terminal device determines that other communication networks currently exist, prompt the user whether to enable signal transmission of the satellite communication system.
  • embodiments of the present application provide a communication device that includes a module/unit that performs the method of the above-mentioned first aspect and any possible implementation of the first aspect.
  • These modules/units can be implemented by hardware, or they can be implemented by hardware executing corresponding software.
  • the communication device may include a transceiver module and a processing module.
  • the transceiver module is used to receive a satellite navigation system signal sent through at least one satellite;
  • the processing module is used to determine the carrier corresponding to each satellite in the at least one satellite based on the satellite navigation system signal sent through at least one satellite.
  • Noise ratio select a target satellite from the at least one satellite according to the carrier-to-noise ratio corresponding to the at least one satellite; the transceiver module is also used to transmit satellite communication system signals through the target satellite.
  • embodiments of the present application provide a communication device, including: a processor, and a memory and a communication interface respectively coupled to the processor; the communication interface is used to communicate with other devices; the processor , used to run instructions or programs in the memory, and execute the method as described in the first aspect and any possible implementation of the first aspect through the communication interface.
  • embodiments of the present application provide a computer-readable storage medium.
  • Computer-readable instructions are stored in the computer-readable storage medium.
  • the computer-readable instructions are run on a computer, the first aspect and any possibility of the first aspect The method described in the implementation is executed.
  • embodiments of the present application provide a computer program product containing instructions that, when run on a computer, cause the method described in the first aspect and any possible implementation of the first aspect to be executed.
  • Figure 1 is a schematic diagram of the Beidou RDSS service principle provided by the embodiment of this application.
  • FIG. 2 is a schematic diagram of the star finding process provided by the embodiment of the present application.
  • FIG. 3 is a schematic diagram of the satellite communication architecture provided by the embodiment of the present application.
  • Figure 4 is a schematic flow chart of a communication method applied to a satellite communication system provided by an embodiment of the present application
  • Figure 5 is a schematic diagram of a satellite beam provided by an embodiment of the present application.
  • Figure 6 is a schematic flow chart of a communication method provided by an embodiment of the present application.
  • Figure 7 is a schematic flow chart of another communication method provided by an embodiment of the present application.
  • Figure 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 9 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • the terminal device may not always receive RDSS signals when there is no need for satellite communication. That is, turn off the RDSS short message service when there is no need for satellite communication.
  • Message service function when satellite communication is required, turn on the RDSS short message service function.
  • this usage method will cause the terminal device to undergo a long satellite search process (ie, the process of finding a target satellite for satellite communication) when satellite communication is required.
  • the Beidou satellite can transmit RNSS signals as a satellite in the radio navigation satellite system (RNSS), and can also transmit RDSS signals as a satellite in the RDSS. Then when the RNSS signal and the RDSS signal sent by the same satellite are transmitted to the same terminal device, the communication environment and communication quality are similar.
  • RNSS radio navigation satellite system
  • the RNSS signal reception (RX) process includes: the RNSS RX front-end module receives the signal, and the RNSS module analyzes the signal received by the front-end module based on the pre-acquired carrier frequency and code phase.
  • the signal performs RNSS signal capture; the RNSS tracking module performs RNSS signal tracking based on the captured RNSS signal, that is, real-time tracking of the carrier frequency and code phase of the RNSS signal based on the carrier frequency and code phase of the received RNSS signal; the RNSS synchronization module Perform bit synchronization and frame synchronization processing on the tracked RNSS signals to determine the bit boundaries and frame headers of the demodulated data; the RNSS decoding module completes message analysis, satellite position calculation, and pseudo range based on the synchronized data. Calculation, etc.; the RNSS position-velocity-time (PVT) calculation module calculates the position, speed, time and other information of the terminal device based on the data obtained by the RNSS decoding module.
  • PVT position-velocity-time
  • the RDSS signal reception process is similar to the RNSS signal reception process, and can also include: RDSS RX front-end module receives the signal, the RDSS acquisition module performs RDSS signal capture on the signal received by the front-end module based on the pre-acquired carrier frequency and code phase; RDSS tracking module Based on the captured RDSS signal, the RDSS signal is tracked; the RDSS synchronization module performs bit synchronization and frame synchronization processing on the tracked RDSS signal; the RDSS decoding module decodes the synchronized data.
  • a prediction unit is added, which is used to predict the RDSS signal based on the data obtained by the RNSS PVT solution module, and predict the received carrier frequency and code of the RDSS signal. phase, so that the terminal device can skip the RDSS acquisition process and directly track the RDSS signal during the reception process, thereby improving the star finding speed for the RDSS signal.
  • the star finding process shown in Figure 2 can improve the star finding speed for RDSS signals to a certain extent, the degree of improvement is relatively limited. Because, even if the RDSS tracking module can track RDSS signals based on the received carrier frequency and code phase predicted by the prediction unit, it still needs to traverse all RDSS signals during tracking, that is, traverse all RDSS signals sent by satellites that may be received, and This process is the more time-consuming part.
  • embodiments of the present application provide a communication method applied to a satellite communication system to achieve rapid satellite search, that is, to quickly find target satellites that can be used to transmit satellite communication system signals, so as to improve the efficiency of satellite communication.
  • the communication method provided by the embodiment of the present application can be applied to the satellite communication architecture as shown in Figure 1 or Figure 3.
  • a terminal device is a device with wireless transceiver functions, such as common mobile phones, wearable devices, various handheld devices, tablet computers, Special communication terminals on unmanned equipment, aircraft, ships and other carriers.
  • the terminal equipment can receive signals from satellite communication systems and signals from satellite navigation systems.
  • the terminal device can receive the RDSS signal and RNSS signal of the Beidou satellite navigation system, and can receive the global navigation satellite system (GNSS), global positioning system (GPS), and GLONASS satellite navigation system.
  • the signal of one or more global navigation systems such as (GLONASS), GAL, etc. can also be the satellite-based augmentation system (SBAS), Indian regional navigation satellite system (IRNSS), Quasi-zenith satellite system (QZSS) and other regional navigation signals.
  • the terminal device can also receive signals at different frequencies in the same mode.
  • the terminal device can receive navigation signals at one or more frequencies such as BDS B1I, B1C, B2A, and B2B in BDS.
  • Satellites are mainly used to provide signal relay and transmission functions.
  • Signal relay refers to communication between satellites.
  • Signal transmission mainly refers to sending communication signals to terminal equipment or ground stations.
  • Satellites can be geostationary orbit (GEO) satellites, middle earth orbit (MEO) satellites, or inclined geosynchronous orbit (inclined geosynchronous orbit, IGSO) satellites, etc. Satellites can provide ephemeris, almanac, time information, and transmit carrier signals.
  • GEO geostationary orbit
  • MEO middle earth orbit
  • IGSO inclined geosynchronous orbit
  • Satellites in the satellite communication architecture shown in Figures 1 and 3 can both be used as satellites in the satellite communication system to transmit satellite communication system signals, and can also be used as satellites in the satellite navigation system to transmit satellite navigation system signals. Furthermore, the satellite communication system signal and the satellite navigation system signal may be clocked together and transmitted at the same time.
  • the ground station (or ground control system) is used to connect the satellite and the core network. On the one hand, it can control the satellite to broadcast signals, and also control the satellite orbit adjustment and attitude adjustment; on the other hand, it can be used as a wireless communication base station.
  • FIG 4 is a schematic flow chart of a communication method applied to a satellite communication system provided by an embodiment of the present application. As shown in the figure, the method may include the following steps:
  • Step 401 The terminal device receives a satellite navigation system signal sent through at least one satellite.
  • the satellite navigation system includes several satellites. Depending on the location of the terminal, the number of satellites that can cover the terminal device is also different. Therefore, the number of satellite navigation system signals that the terminal device can receive from different satellites is also different. For example, if the terminal device may receive RNSS signal 1 sent by satellite 1, RNSS signal 2 sent by satellite 2, and RNSS signal 3 sent by satellite 3 at the first moment; because the terminal device is in a mobile state, it may receive RNSS signal 1 at the second moment. RNSS signal 3 sent by satellite 3 and RNSS signal 4 sent by satellite 4.
  • Step 402 The terminal device determines the carrier-to-noise ratio corresponding to each satellite in the at least one satellite based on the satellite navigation system signal sent through the at least one satellite.
  • Carrier-to-noise ratio is a standard measurement scale used to indicate the relationship between carrier and carrier noise. A higher carrier-to-noise ratio can provide better network reception rate, better network communication quality, and better network reliability.
  • the carrier-to-noise ratio can be recorded as CNR, or C/N (unit is dB), where C represents the carrier and N represents the carrier noise.
  • C represents the carrier
  • N represents the carrier noise
  • B represents the system bandwidth, which is the signal power and noise power density ratio.
  • the terminal equipment determines the corresponding carrier-to-noise ratio for the received satellite navigation system signals. Furthermore, the terminal equipment can establish the corresponding relationship between the carrier-to-noise ratio and the satellite. For example, the terminal device may receive RNSS signal 1 sent by satellite 1, RNSS signal 2 sent by satellite 2, and RNSS signal 3 sent by satellite 3 at the first moment; then the terminal device can determine CN0 1 for RNSS signal 1, and RNSS signal 3 for RNSS signal 1. 2 determine CN0 2, and determine CN0 3 for RNSS signal 3; then, the terminal device can establish the corresponding relationship between CN0 1 and satellite 1, the corresponding relationship between CN0 2 and satellite 2, and the corresponding relationship between CN0 3 and satellite 3.
  • Step 403 The terminal device selects a target satellite from at least one satellite according to the carrier-to-noise ratio corresponding to the at least one satellite.
  • the terminal equipment selects the target satellite based on the carrier-to-noise ratio in order to select satellites with better communication quality for communication.
  • the terminal equipment can use the satellite with the highest carrier-to-noise ratio as the target satellite; or, the communication conditions can be set in advance, and the terminal equipment can use the satellite with the carrier-to-noise ratio that meets the communication conditions as the target satellite.
  • the terminal equipment can be configured with a carrier in advance. Noise ratio threshold, satellites whose carrier-to-noise ratio is greater than or equal to the preset threshold are used as target satellites.
  • the terminal device can further select the target satellite from the multiple satellites that meet the communication conditions.
  • the terminal device can also determine the position information of the terminal device relative to each satellite based on the received satellite navigation system signal.
  • the terminal device performs the above step 403 in addition to selecting a satellite with better communication quality based on the carrier-to-noise ratio, it can also select a satellite with better communication quality based on the position information of the terminal device relative to the satellite.
  • the position information of the terminal device relative to the satellite may include the elevation angle of the terminal device relative to the satellite, the Information such as the azimuth angle relative to the satellite.
  • the terminal device can determine the carrier-to-noise ratio corresponding to each satellite based on the received satellite navigation system signal, and the elevation angle of the terminal device relative to each satellite; the terminal device can determine multiple The satellites are initially screened to eliminate satellites whose carrier-to-noise ratio does not reach the carrier-to-noise ratio threshold; then, for satellites whose carrier-to-noise ratio reaches the carrier-to-noise ratio threshold, target satellites are selected based on the elevation angle of the terminal equipment relative to each satellite. Generally speaking, the larger the elevation angle, the smaller the probability of being blocked and the better the communication quality. Therefore, the terminal device can use the satellite with the largest elevation angle as the target satellite.
  • the terminal device can determine the location adjustment strategy of the terminal device based on the location information of the terminal device relative to each satellite, and display the determined location adjustment strategy so that the user can The terminal's position is adjusted according to the position adjustment strategy to receive signals with a higher carrier-to-noise ratio.
  • the determined position adjustment strategy can be "move the terminal device to an open area"; in order to make the terminal device move from the satellite coverage edge to the coverage center, the determined position adjustment strategy can be "determine the terminal device to move to the coverage center". "Moving eastward”, it should be understood that "moving eastward” here is only an example and does not limit the embodiments of the present application.
  • the user can adjust the position of the terminal device accordingly according to the displayed position adjustment strategy so as to receive a signal whose carrier-to-noise ratio meets the communication conditions.
  • the terminal device can also send satellite communication system signals to each satellite and receive the communication system signals sent by each satellite.
  • terminal devices use satellite communications, they are usually in emergency situations, such as in forests, deserts, seas and other scenes that are not covered by mobile communication networks, or when the ground mobile communication network is damaged, such as in wars or natural disasters. hour. Therefore, although the current communication quality of each satellite is not good, given the emergency situation, the terminal device can try to communicate with each satellite to increase the probability of successful message delivery.
  • Step 404 The terminal device transmits the satellite communication system signal through the target satellite.
  • the terminal device After selecting the target satellite, the terminal device can send satellite communication system signals to the target satellite or receive satellite communication system signals sent by the target satellite.
  • the terminal device can also determine the position adjustment strategy of the terminal device based on the position information of the terminal device relative to the target satellite, and display the position adjustment strategy so that the user can adjust the position according to the position information.
  • the policy adjusts the location of the terminal.
  • the step of determining the position information of the terminal device relative to the target satellite can be performed after determining the target satellite, or can be performed immediately after receiving the satellite navigation system signal sent by the target satellite.
  • the position information of the terminal device relative to the target satellite may also include the elevation angle, azimuth angle, etc. of the terminal device relative to the target satellite.
  • the terminal device can determine the position adjustment strategy of the terminal device based on the position information of the terminal device relative to the target satellite. For example, in order to avoid external occlusion, the determined position adjustment strategy can be "move the terminal device to the open area"; in order to make the terminal device move from the satellite coverage edge to the coverage center, the determined position adjustment strategy can be "determine the terminal device to move eastward". move". After the terminal device displays the determined location adjustment strategy, the user can adjust the location of the terminal device according to the displayed location adjustment strategy to obtain better communication quality.
  • the satellite transmits the satellite communication system signal when it transmits the satellite communication system signal, it can also transmit through the satellite beam to obtain a beam with good directivity to increase the power in the transmission direction and improve the carrier-to-noise ratio at the receiving end.
  • the satellite sends the satellite communication system signal when it sends the satellite communication system signal, it can send it through beam 1, beam 2, and beam 3 respectively. Since the terminal equipment is located in an area where the coverage of the three beams overlaps, there is no need for external signals.
  • the terminal device can receive the signals sent by the satellite through beam 1, beam 2, and beam 3 respectively; if the terminal device is not located in the overlapping area, for example, the terminal device is only located within the coverage of beam 1, then the terminal device can only receive to the signal sent by the satellite via Beam 1.
  • the terminal device can further select the target beam of the target satellite. Specifically, the terminal device receives satellite communication system signals (such as system messages in the satellite communication system, etc.) sent by the target satellite through at least one beam. Depending on the location of the terminal device, the terminal device may receive the signal sent by the target satellite through one beam, or it may receive the signal sent through multiple beams. Then, the terminal device can determine the carrier-to-noise ratio corresponding to each signal based on the received satellite communication system signal, that is, the carrier-to-noise ratio corresponding to each beam. The terminal device can select a target beam from at least one beam according to the carrier-to-noise ratio of each beam. Finally, the terminal device can transmit the satellite communication system signal through the target beam of the target satellite.
  • satellite communication system signals such as system messages in the satellite communication system, etc.
  • the terminal equipment when the terminal equipment selects the target beam, it can use the beam with the highest carrier-to-noise ratio as the target beam; or, it can also set the communication conditions for the beam in advance, and the terminal equipment will set the carrier-to-noise ratio to meet the communication conditions of the beam. beam as the target beam. like If there are multiple beams whose carrier-to-noise ratios meet the communication conditions of the beams, then the terminal device can further select the target beam from the multiple beams based on information such as the elevation angle and azimuth angle of the terminal device relative to each beam.
  • the satellite beam in the embodiment of the present application may be similar to the beamforming (BF) technology used in the terrestrial mobile communication system, or may be implemented by other methods that can achieve directional transmission, which is not limited by the embodiment of the present application.
  • BF beamforming
  • the satellite communication function of the terminal device may not be turned on all the time. Instead, the function is turned on when satellite communication is required, and the satellite communication requirement is over. , the user will turn off the satellite communication function or the terminal device will automatically turn off the satellite communication function.
  • the terminal device before the terminal device executes the communication method provided by the embodiment of the present application, the user needs to turn on the satellite communication function of the terminal device, that is, the terminal device is receiving satellite communication instructions, and the satellite communication instructions are used to instruct the terminal device Turn on the satellite communication function; after receiving the satellite communication command, the terminal device first determines whether there are other communication networks, such as mobile communication networks (5G, 4G, etc.), wireless local area networks, etc.
  • the terminal device can Prompt the user whether to continue to enable the satellite communication function, or prompt the user that other communication networks currently exist, to avoid misoperation by the user, or to prevent the user from using satellite communication with higher charges when other communication networks exist. If there is no other communication network currently, the terminal device executes the communication method provided by the embodiment of the present application, that is, the above-mentioned steps 401 to 404 and any possible implementation thereof.
  • the following takes the satellite communication system signal as the RDSS signal and the satellite navigation system signal as the RNSS signal as an example, and illustrates it with reference to FIG. 6 and FIG. 7 .
  • the RNSS signal receiving process includes: RNSS RX front-end receives the signal, and performs RNSS signal capture based on the pre-acquired carrier frequency and code phase; based on the captured RNSS signal, performs RNSS signal tracking, that is, based on the received Track the carrier frequency and code phase of the RNSS signal in real time; perform bit synchronization and frame synchronization processing on the tracked RNSS signal to determine the bit boundary and frame header of the demodulated data.
  • the obtained satellite orbit information determines the elevation and azimuth angles of the terminal equipment relative to each satellite (ie, the auxiliary information in Figure 5). Furthermore, the carrier-to-noise ratio of each satellite can also be determined.
  • the RDSS signal reception process includes: RDSS RX front-end receives the signal, and performs visibility screening of satellites based on auxiliary information.
  • the auxiliary information includes the carrier-to-noise ratio corresponding to each satellite, then the terminal device can select the target satellite based on the carrier-to-noise ratio; based on the filtered
  • the carrier frequency and code phase corresponding to the satellite are used to capture the RDSS signal on the received signal (in the traditional scheme, the RDSS signal acquisition process is to capture the RDSS signal for all satellites, while in this scheme the satellites have been screened for visibility.
  • the RDSS signal acquisition process can only be performed for the target satellite); RDSS signal tracking is performed based on the captured RDSS signal; the RDSS synchronization module performs bit synchronization and frame synchronization processing on the tracked RDSS signal; and decoding is performed based on the synchronized data.
  • the RDSS signal transmission (TX) process includes: the terminal device determines the information to be sent, performs RDSS channel coding on the information to be sent, then spreads the coded information, and performs filtering and digital down conversion (DDC) on the spread spectrum information. Process, then perform carrier modulation on the processed information, and finally send the modulated signal through the RDSS TX front end. Furthermore, in order to obtain better communication quality, the terminal device can also determine the location adjustment strategy of the terminal device based on the obtained auxiliary information and prompt it to the user. The user can adjust the location of the terminal device according to the location adjustment strategy before sending the signal.
  • DDC digital down conversion
  • the user first enables the satellite communication function of the terminal device; the terminal device determines whether the conditions for enabling the satellite communication function are met, that is, whether a mobile communication network or WLAN currently exists. If the conditions for enabling the satellite communication function are not met, the user is prompted to use other methods for communication; if the conditions are met, the satellite communication function is activated.
  • the terminal device After activating the satellite communication function, the terminal device determines whether the RDSS beam is visible based on the RNSS auxiliary information (such as the terminal device's carrier-to-noise ratio, elevation angle, azimuth angle, etc. relative to the satellite). That is, the terminal device determines whether the RDSS beam is visible based on the carrier-to-noise ratio corresponding to each satellite. Select the target satellite from multiple satellites.
  • the RNSS auxiliary information such as the terminal device's carrier-to-noise ratio, elevation angle, azimuth angle, etc. relative to the satellite. That is, the terminal device determines whether the RDSS beam is visible based on the carrier-to-noise ratio corresponding to each satellite. Select the target satellite from multiple satellites.
  • the terminal device can also determine the position adjustment strategy of the terminal device based on the auxiliary information and display it to the user, so that the user can adjust the position of the terminal device to receive to the RNSS signal with a high carrier-to-noise ratio, and then select the target satellite.
  • the terminal device After selecting the target satellite, the terminal device captures at least one beam of the target satellite, that is, receives the RDSS signal sent by the target satellite through at least one beam; then the terminal device determines the carrier-to-noise ratio (CN0) corresponding to each beam, and determines the carrier-to-noise ratio (CN0) corresponding to each beam.
  • the carrier-to-noise ratio corresponding to the beam selects the target beam from at least one beam.
  • the terminal device can send the RDSS signal to the target satellite based on the selected target beam of the target satellite.
  • the same satellite can send both satellite navigation system signals and satellite communication system signals. Therefore, the communication environment and communication quality of satellite navigation system signals and satellite communication system signals are similar. Therefore, the terminal equipment can select the Select the target satellite used to transmit satellite communication system signals.
  • the satellite communication system signal transmission function of the terminal device is not always on, but the satellite navigation system signal transmission function is.
  • the above-mentioned assisted selection of the target satellite of the satellite communication system signal based on the satellite navigation system signal is , compared with the traditional solution of traversing all satellites to select the target satellite for the satellite communication system signal, the target satellite can be determined more quickly, reducing the time required to select the target satellite, thereby improving communication efficiency.
  • the receiving end captures the RDSS signal, decodes the received RDSS signal, and analyzes the message to obtain the content of the text message.
  • FIG 8 is a schematic diagram of a communication device provided according to an embodiment of the present application.
  • the communication device includes a processing module 801 and a transceiver module 802.
  • the processing module 801 is used to implement data processing by the communication device.
  • the transceiver module 802 is used to receive and send interactive content between the communication device and other units or network elements.
  • the processing module 801 in the embodiment of the present application can be implemented by a processor or a processor-related circuit component (or, referred to as a processing circuit), and the transceiver module 802 can be implemented by a receiver/transmitter or a receiver/transmitter-related circuit component. .
  • the communication device may be a communication device, or may be a chip used in the communication device or other combined devices, components, etc. having the functions of the above communication device.
  • the communication device can be used to implement the steps performed by the terminal device in the above method embodiment.
  • the transceiver module 802 is used to receive the satellite navigation system signal sent through at least one satellite;
  • the processing module 801 is used to receive the satellite navigation system signal through at least one satellite according to the The satellite navigation system signal sent by the satellite determines the carrier-to-noise ratio corresponding to each satellite in the at least one satellite, and selects a target satellite from the at least one satellite based on the carrier-to-noise ratio corresponding to the at least one satellite; sending and receiving Module 802 is also used to transmit satellite communication system signals through the target satellite.
  • each of the above modules can also be used to support other processes executed by the terminal device in the embodiments shown in FIGS. 4 to 7 .
  • the beneficial effects can be referred to the previous description and will not be repeated here.
  • An embodiment of the present application also provides a communication device.
  • the communication device includes a processor 901 as shown in Figure 9, and a communication interface 902 connected to the processor 901. Further, the communication device may also include a memory 903 and a communication bus 904.
  • the processor 901 may be a general processor, a microprocessor, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or one or more integrated circuits used to control the execution of the program of this application, etc.
  • a general-purpose processor may be a microprocessor or any conventional processor, etc.
  • Communication interface 902 is used to communicate with other devices, such as PCI bus interface, network card, wireless access network (radio access network, RAN), wireless local area networks (WLAN), etc.
  • PCI bus interface for communicating with other devices, such as PCI bus interface, network card, wireless access network (radio access network, RAN), wireless local area networks (WLAN), etc.
  • WLAN wireless local area networks
  • the memory 903 is used to store program instructions and/or data, so that the processor 901 calls the instructions and/or data stored in the memory 903 to implement the above functions of the processor 901.
  • the memory 903 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory (RAM)) or other type that can store information and instructions.
  • ROM read-only memory
  • RAM random access memory
  • a dynamic storage device that can also be an electrically erasable programmable read-only memory (EEPROM) or can be used to carry or store desired program code in the form of instructions or data structures and can be stored by a computer. any other medium, but not limited to this.
  • the memory 903 may exist independently, such as an off-chip memory, and is connected to the processor 901 through a communication bus 904 .
  • the memory 903 may also be integrated with the processor 901.
  • Storage 903 may include internal memory and external memory (such as hard disk, etc.).
  • Communication bus 904 may include a path for communicating information between the components described above.
  • the communication device can be used to implement the steps performed by the terminal device in the above method embodiment.
  • the processor 901 can call instructions in the memory 903 to perform the following steps through the communication interface 902:
  • the processor 901 is further configured to: determine the position information of the communication device relative to the at least one satellite according to the satellite navigation system signal sent through the at least one satellite; the processor 901.
  • the processor 901. When selecting a target satellite from the at least one satellite according to the carrier-to-noise ratio corresponding to the at least one satellite, it is specifically used: when there are at least two satellites in the carrier-to-noise ratio corresponding to the at least one satellite.
  • the communication device is relative to the at least two satellites. position information of the satellite, and selects a target satellite from the at least two satellites.
  • the position information of the communication device relative to the satellite includes the elevation angle of the communication device relative to the satellite; the processor 901, according to the position information of the communication device relative to the at least two The position information of the satellites, when selecting the target satellite from the at least two satellites, is specifically used to: use the satellite with the largest elevation angle among the at least two satellites as the target satellite.
  • the processor 901 is further configured to: determine the position information of the communication device relative to the target satellite according to the satellite navigation system signal sent through the target satellite; Based on the position information of the target satellite, a position adjustment strategy of the communication device is determined; and the position adjustment strategy is displayed.
  • the location information includes the azimuth angle and/or elevation angle of the communication device relative to the satellite.
  • the processor 901 is further configured to: when the carrier-to-noise ratio corresponding to each satellite in the at least one satellite does not meet the communication conditions, the processor 901 is configured to: system signal, determine the position information of the communication device relative to the at least one satellite; determine the position adjustment strategy of the communication device based on the position information of the communication device relative to the at least one satellite; display the position adjustment Strategy.
  • the processor 901 when transmitting a satellite communication system signal through the target satellite, is specifically configured to: receive a satellite communication system signal sent by the target satellite through at least one beam; according to the Satellite communication system signals transmitted through at least one beam, determining the carrier-to-noise ratio corresponding to each beam in the at least one beam; selecting a target from the at least one beam according to the carrier-to-noise ratio corresponding to the at least one beam Beam; transmit satellite communication system signals through the target beam.
  • the processor 901 before determining the carrier-to-noise ratio corresponding to each satellite in the at least one satellite, the processor 901 is also configured to: receive a satellite communication instruction, where the satellite communication instruction is used to indicate The communication device enables signal transmission of the satellite communication system; determines whether other communication networks currently exist; and if it is determined that other communication networks currently exist, prompts the user whether to enable signal transmission of the satellite communication system.
  • each of the above modules can also be used to support other processes executed by the terminal device in the embodiments shown in FIGS. 4 to 7 .
  • the beneficial effects can be referred to the previous description and will not be repeated here.
  • embodiments of the present application also provide a computer-readable storage medium.
  • the computer-readable storage medium stores computer-readable instructions.
  • Embodiments of the present application provide a computer program product containing instructions, which when run on a computer causes the above method embodiments to be executed.
  • Embodiments of the present application provide a computer-readable storage medium storing a computer program.
  • the computer program includes instructions for executing the above method embodiments.
  • Embodiments of the present application provide a computer program product containing instructions that, when run on a computer, cause the computer to execute the above method embodiments.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.
  • a computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions
  • the device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
  • These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device.
  • Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Radio Relay Systems (AREA)

Abstract

La présente demande divulgue un procédé de communication et un appareil de communication pour un système de communication par satellite. Selon le procédé, un dispositif terminal reçoit un signal RNSS envoyé au moyen d'au moins un satellite ; le dispositif terminal détermine un rapport porteuse sur bruit du ou des satellites en fonction du signal RNSS envoyé au moyen du ou des satellites ; le dispositif terminal sélectionne un satellite cible parmi le ou les satellites en fonction du rapport porteuse sur bruit correspondant au ou aux satellites ; et le dispositif terminal transmet un signal RDSS au moyen du satellite cible. Étant donné qu'une fonction de transmission de signal RDSS du dispositif terminal n'est normalement pas activée, et qu'une fonction de transmission de signal RNSS est normalement activée, dans ce cas, le rapport porteuse sur bruit correspondant à chaque satellite recevable est déterminé à l'aide du signal RNSS, et le satellite cible destiné à transmettre le signal RDSS est sélectionné, de telle sorte que, par comparaison avec une technique de recherche de satellite RDSS classique, le satellite cible puisse être déterminé plus rapidement.
PCT/CN2023/118899 2022-09-16 2023-09-14 Procédé de communication et appareil de communication pour système de communication par satellite WO2024056036A1 (fr)

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CN202211131919.5A CN117767993A (zh) 2022-09-16 2022-09-16 一种卫星通信系统的通信方法及通信装置
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Citations (5)

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CN111130631A (zh) * 2019-12-30 2020-05-08 北京华力创通科技股份有限公司 卫星终端在实网环境下波束自适应选择方法和系统
CN114019537A (zh) * 2021-11-08 2022-02-08 中国商用飞机有限责任公司北京民用飞机技术研究中心 北斗短报文干扰抑制方法、装置、计算机设备及存储介质
CN114124201A (zh) * 2022-01-25 2022-03-01 青岛国数信息科技有限公司 基于北斗geo卫星的自适应全球通信系统
CN114845347A (zh) * 2022-04-27 2022-08-02 中国人民解放军32021部队 一种北斗短报文用户端服务区接入切换方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180172838A1 (en) * 2016-12-19 2018-06-21 Trimble Inc. Outlier-tolerant navigation satellite system positioning method and system
CN111130631A (zh) * 2019-12-30 2020-05-08 北京华力创通科技股份有限公司 卫星终端在实网环境下波束自适应选择方法和系统
CN114019537A (zh) * 2021-11-08 2022-02-08 中国商用飞机有限责任公司北京民用飞机技术研究中心 北斗短报文干扰抑制方法、装置、计算机设备及存储介质
CN114124201A (zh) * 2022-01-25 2022-03-01 青岛国数信息科技有限公司 基于北斗geo卫星的自适应全球通信系统
CN114845347A (zh) * 2022-04-27 2022-08-02 中国人民解放军32021部队 一种北斗短报文用户端服务区接入切换方法

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