WO2024040839A1 - 卫星通信中的切换方法、通信装置、介质及电子设备 - Google Patents

卫星通信中的切换方法、通信装置、介质及电子设备 Download PDF

Info

Publication number
WO2024040839A1
WO2024040839A1 PCT/CN2022/143321 CN2022143321W WO2024040839A1 WO 2024040839 A1 WO2024040839 A1 WO 2024040839A1 CN 2022143321 W CN2022143321 W CN 2022143321W WO 2024040839 A1 WO2024040839 A1 WO 2024040839A1
Authority
WO
WIPO (PCT)
Prior art keywords
satellite
terminal device
connection area
target connection
switching
Prior art date
Application number
PCT/CN2022/143321
Other languages
English (en)
French (fr)
Inventor
汤凯
邹传明
Original Assignee
湖北星纪魅族科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 湖北星纪魅族科技有限公司 filed Critical 湖北星纪魅族科技有限公司
Publication of WO2024040839A1 publication Critical patent/WO2024040839A1/zh

Links

Images

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
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18519—Operations control, administration or maintenance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface

Definitions

  • Embodiments of the present disclosure relate to a switching method, communication device, medium and electronic equipment in satellite communications.
  • Geostationary satellites have long been used for mobile communications, but because geostationary satellites are limited to geostationary satellite orbits (Geostationary Satellite Orbit, GSO), the number of satellites that can be deployed in the GSO is limited.
  • GSO geostationary Satellite Orbit
  • communication systems using satellite constellations in non-geostationary satellite orbits such as Low Earth Orbit (LEO) have been designed to provide communications to the entire Earth or Communications coverage is provided in most locations on Earth. Since the exposure time of low-orbit satellites over the same terminal is limited, at the same time, there may be multiple available low-orbit satellites exposed over the terminal equipment at the same time, and they are all in high-speed motion. For example, for a common low-orbit satellite, it takes about 100 minutes to orbit the earth. For a terminal device, the satellite's service time is about ten minutes. Therefore, the terminal equipment needs to be switched between different satellites.
  • Embodiments of the present disclosure provide a switching method, communication device, medium and electronic equipment in satellite communications to avoid the problems of low bandwidth utilization and poor signal quality affecting the transmission rate caused by frequent switching in the terminal-satellite communication system.
  • the first aspect of the present disclosure provides a switching method in satellite communications, including: a terminal device is connected to a first satellite through a first beam; the terminal device obtains the next incoming target connection. The second satellite in the area, the terminal equipment establishes a pre-connection with the second satellite through the second beam; when the first satellite leaves the target connection area and the second satellite is in a connectable state, the The terminal device is connected to the second satellite through the second beam switching, and disconnected from the first satellite.
  • the method further includes: the terminal device acquiring the next third satellite that enters the target connection area, and the terminal device communicating with the third satellite through the first beam. Three satellites establish a pre-connection; when the second satellite leaves the target connection area and the third satellite is in a connectable state, the terminal device connects to the third satellite through the first beam switching, and Disconnect from the second satellite.
  • connecting the terminal device to the first satellite through the first beam includes: the terminal device acquires signal strengths of a plurality of candidate satellites, wherein the plurality of candidate satellites are in the Within the target connection area; select the first satellite from the candidate satellites according to signal strength; and the terminal device is connected to the first satellite through the first beam.
  • selecting the first satellite from the candidate satellites according to signal strength includes: selecting the candidate satellite with the strongest signal strength as the first satellite.
  • the terminal device acquiring the next second satellite entering the target connection area includes: the terminal device acquiring the next satellite entering the target connection area through the second beam detection.
  • a satellite serves as the second satellite, or the terminal device obtains the next satellite entering the target connection area as the second satellite through satellite ephemeris information.
  • the terminal device acquiring the next third satellite entering the target connection area includes: the terminal device acquiring the next entering the target connection through the first beam detection.
  • the satellite in the target connection area is used as the third satellite, or the terminal device obtains the next satellite entering the target connection area as the third satellite through satellite ephemeris information.
  • the switching method in satellite communication further includes: determining the target connection area according to the current positioning of the terminal device, wherein the terminal device is located in the target connection area.
  • the communication transmission rate of the satellites on the zone boundary is the first transmission rate
  • the communication rate of the terminal equipment and the satellite with the highest elevation angle above the terminal equipment is the second transmission rate
  • the first transmission rate is at least not lower than the half of the second transmission rate
  • the target connection area contains at least two satellites at the same time.
  • establishing a pre-connection between the terminal device and the second satellite through the second beam includes: the terminal device performing handshake communication with the second satellite through the second beam. , and obtain the link environment and connection information.
  • the method further includes: when the first satellite switches to a connection prohibited state in the target connection area, the terminal device switches the connection through the second beam. to the second satellite and disconnect from the first satellite.
  • the method further includes: when the first satellite leaves the target connection area and the second satellite is in a connection prohibited state, the terminal device remains connected to the The first satellite connects until the third satellite enters the target connection zone.
  • the method further includes: the terminal device reconnects from the target based on the ephemeris information. Another first satellite in a connectable state is determined in the connection area and connected to the other first satellite through the first beam.
  • the terminal device is configured with a phased array antenna, and the phased array antenna is used to transmit the first beam and the second beam.
  • a second aspect of the present disclosure provides a communication device, including: a transceiver unit for transmitting at least a first beam and a second beam; a processing unit configured to perform the following steps: a terminal device communicates with a first satellite through the first beam Connect; the terminal equipment obtains the second satellite that enters the target connection area next, and the terminal equipment establishes a pre-connection with the second satellite through the second beam; when the first satellite leaves the target connection area and the When the second satellite is in a connectable state, the terminal device is connected to the second satellite through the second beam switching and disconnects from the first satellite.
  • a third aspect of the disclosure provides a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by a processor, the switching method according to any one of the first aspects of the disclosure is implemented.
  • a fourth aspect of the present disclosure provides an electronic device.
  • the electronic device includes: a memory that stores a computer program; a processor that is communicatively connected to the memory and executes any one of the first aspects of the present disclosure when calling the computer program. The switching method described in the item.
  • the switching method, communication device, medium and electronic equipment in satellite communication provided in the embodiments of the present disclosure have the following beneficial effects:
  • the switching method optimizes the switching strategy between the satellite and the ground terminal equipment when the satellite is running rapidly in orbit.
  • the terminal device switches to connect to the second satellite.
  • this method can reduce the number of handovers, thereby avoiding the problem of excessive network overhead caused by frequent handovers.
  • this method can reduce the weak signal connection time of the terminal device, which is beneficial to improving signal quality and transmission rate.
  • FIG. 1A shows an example diagram of a satellite communication scenario in an embodiment of the present disclosure.
  • FIG. 1B shows a flow chart of a handover method in satellite communication according to an embodiment of the present disclosure.
  • FIG. 2 shows a flow chart of several steps of the handover method in satellite communication according to the embodiment of the present disclosure.
  • Figure 3 shows a flow chart of connecting a terminal device to a first satellite in an embodiment of the present disclosure.
  • FIG. 4 shows a schematic structural diagram of a communication device according to an embodiment of the present disclosure.
  • FIG. 5 shows a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.
  • the terminal device is always connected to the low-orbit satellite with the highest elevation angle above. This method will cause the terminal device to frequently switch the satellite to which it is connected, thus generating a large number of protocol packets for interaction between the satellite and the terminal device. .
  • the network scale is large and the number of nodes is large, the number of protocol packets will increase multiple times, resulting in greater network overhead and reduced bandwidth resource utilization.
  • the terminal device always remains connected to a satellite until the satellite is unavailable and then switches. In this method, the communication quality is poor when the satellite is far away from the terminal device, affecting the transmission rate.
  • Satellites can be low Earth orbit (LEO) satellites (or low-orbit satellites), non-geostationary earth orbit (NGEO) satellites, etc.
  • LEO low Earth orbit
  • NGEO non-geostationary earth orbit
  • the terminal devices in this article include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems with unlimited wireless communication functions. Specifically, they may refer to user equipment (UE), access Terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communications equipment, user agent or user device.
  • UE user equipment
  • access Terminal subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communications equipment, user agent or user device.
  • the terminal device may also be a satellite phone, a cellular phone, a smartphone, a wireless data card, a wireless modem, a machine type communications device, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (wireless local) loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, vehicle-mounted device or wearable device, virtual reality (virtual reality, VR) terminal equipment, augmented reality (AR) terminal equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical , wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, 5G network or future communications Terminal equipment in the network, etc.
  • VR virtual reality
  • AR augmented reality
  • the ground station equipment is, for example, equipment in the core network (CN) of the existing mobile communication architecture (such as the 3GPP access architecture of the 5G network) or equipment in the core network in the future mobile communication architecture.
  • CN core network
  • existing mobile communication architecture such as the 3GPP access architecture of the 5G network
  • equipment in the core network in the future mobile communication architecture such as the 3GPP access architecture of the 5G network
  • the terminal device In related technologies, there are two main switching solutions for terminal equipment.
  • the terminal device In the first solution, the terminal device is always connected to the low-orbit satellite with the highest elevation angle above. This method will cause the terminal device to frequently switch the satellite to which it is connected, thus generating a large number of protocol packets for interaction between the satellite and the terminal device. .
  • the network scale is large and the number of nodes is large, the number of protocol packets will increase multiple times, resulting in greater network overhead and reduced bandwidth resource utilization.
  • the terminal device In the second solution, the terminal device always remains connected to a satellite until the satellite is unavailable and then switches. In this method, the communication quality is poor when the satellite is far away from the terminal device, affecting the transmission rate.
  • embodiments of the present disclosure provide a switching method in satellite communications, which optimizes the switching strategy between the satellite and the terminal device when the satellite is running rapidly in orbit.
  • Figure 1A shows a schematic diagram of a satellite communication scenario in an embodiment of the present disclosure.
  • the terminal device in the embodiment of the present disclosure is located on the ground, including but not limited to mobile phones, tablet computers, etc.
  • Terminal equipment can detect, track and access satellites through beamforming technology.
  • the terminal equipment is equipped with at least two beams to achieve rapid tracking and adjustment of satellites.
  • Satellites A, B and C may be, for example, low-orbit satellites, but the disclosure is not limited thereto.
  • the target connection area refers to an area above the terminal equipment.
  • the terminal-satellite communication quality when the satellite is within this area that is, the communication quality between the user terminal and the satellite
  • the target connection area may be determined by the satellite orbit, the best entry point, and the best exit point. It should be understood that FIG. 1A only illustrates one terminal device and three satellites, but the number of terminal devices and satellites in specific applications is not limited to this.
  • Figure 1B shows a flow chart of the switching method in this embodiment.
  • the switching method provided by this embodiment includes the following steps S11 to S13.
  • the terminal device is connected to the first satellite through the first beam.
  • the first satellite is located in the target connection area, such as satellite C in Figure 1A. After the terminal device is connected to the first satellite, the first satellite provides communication services to the terminal device.
  • the terminal device obtains the second satellite that enters the target connection area next, and establishes a pre-connection with the second satellite through the second beam. Specifically, when the second satellite, such as satellite B in Figure 1A, passes through the optimal entry point and enters the target connection area, the terminal device is pre-connected to the satellite through the second beam, and at this time the system enters the pre-switching state.
  • the second satellite such as satellite B in Figure 1A
  • the second beam may be used to detect whether a satellite enters the target connection area.
  • the terminal device connects to the second satellite through the second beam switching and disconnects from the first satellite. For example, when satellite A in Figure 1A moves away from the optimal cut-out point, if satellite B is in a connectable state, the terminal device connects to satellite B through the second beam and disconnects from satellite A. After that, The first beam is no longer pointed towards satellite A.
  • the switching method provided by the embodiment of the present disclosure when the first satellite leaves the target connection area and the second satellite is in a connectable state, the terminal device switches to connect to the second satellite.
  • the switching method provided in this embodiment can reduce the number of switching times, which is helpful to avoid the problem of excessive network overhead caused by frequent switching.
  • the switching method provided by this embodiment can reduce the weak signal connection time of the terminal device, which is beneficial to improving signal quality and transmission rate. .
  • the switching method in satellite communication may further include the following steps S21 and S22.
  • the terminal device obtains the third satellite that enters the target connection area next, and the terminal device establishes a pre-connection with the third satellite through the first beam. Specifically, after the terminal device is connected to the second satellite, the first beam no longer points to the first satellite. Therefore, the first beam can be used to detect whether a satellite enters the target connection zone. When detecting that the third satellite enters the target connection area, the terminal device pre-connects with the third satellite through the first beam.
  • the terminal device is connected to the third satellite through the first beam switching and disconnects from the second satellite.
  • the above steps S21 and S22 can be executed after the terminal device switches to connect to the second satellite, for example, but the disclosure is not limited to this.
  • the above only exemplarily introduces the switching method between the terminal device and the first satellite, the second satellite, and the third satellite, but the disclosure is not limited thereto.
  • the terminal equipment after the terminal equipment is connected to the third satellite, the second beam no longer points to the second satellite; when it is detected that the fourth satellite enters the target connection area, the terminal equipment pre-connects with the fourth satellite through the second beam; in the When the three satellites leave the target connection area and the fourth satellite is in a connectable state, the terminal device connects to the fourth satellite through the second beam, and so on.
  • the first satellite is the satellite to which the terminal device is initially connected. That is, the terminal device has not been connected to a satellite before, or the satellite to which the terminal device has been connected before and the pre-connected satellite are all in a connection prohibited state.
  • connecting the terminal device to the first satellite through the first beam includes the following steps S31 to S33.
  • the terminal device obtains the signal strengths of multiple candidate satellites, where the multiple candidate satellites are within the target connection area.
  • Candidate satellites may be, for example, all available satellites in the vicinity of the terminal device.
  • S32 Select the first satellite from the candidate satellites according to the signal strength.
  • the candidate satellites can be sorted according to signal strength, and the one with the strongest signal strength is selected as the first satellite, but the disclosure is not limited to this.
  • the terminal device is connected to the first satellite through the first beam.
  • the above steps S31 to S33 provide a method for the terminal device to initially establish a connection with the satellite. Based on this method, the terminal device can establish an initial connection with the satellite. Thereafter, the terminal device can use the switching method provided in the above embodiment to switch to other satellites, thereby achieving continuous and stable terminal-satellite communication.
  • the terminal device acquires the next second satellite that enters the target connection area, including: the terminal device acquires the next satellite that enters the target connection area as the second satellite through second beam detection, or the terminal device acquires the next satellite that enters the target connection area as the second satellite.
  • the ephemeris information obtains the next satellite entering the target connection area as the second satellite.
  • the satellite's ephemeris information refers to the precise position or trajectory table of the satellite that changes with time in GPS measurements. Satellite-based ephemeris information can accurately calculate, predict, depict, and track the satellite's time, position, speed and other operating conditions.
  • the satellite ephemeris information may include, for example, at least one of the following information: the inclination of the satellite's orbital plane, the right ascension of the ascending node, the semi-major axis of the orbital ellipse, the eccentricity of the orbital ellipse, the angular distance of perigee, and The moment when the satellite passes close approach.
  • the terminal device acquires the next third satellite that enters the target connection area, including: the terminal device acquires the next satellite that enters the target connection area as the third satellite through first beam detection, or the terminal device acquires the next satellite that enters the target connection area as the third satellite.
  • the ephemeris information obtains the next satellite entering the target connection area as the third satellite.
  • the target connection area is determined according to the current positioning of the terminal device, wherein the communication between the terminal device and the satellite located on the boundary of the target connection area (ie, the best entry point and the best exit point)
  • the transmission rate is the first transmission rate
  • the communication rate between the terminal equipment and the satellite with the highest elevation angle above the terminal equipment is the second transmission rate
  • the first transmission rate is at least not less than half of the second transmission rate
  • at the same time at least Contains two satellites.
  • the terminal device establishing a pre-connection with the second satellite through the second beam includes: the terminal device performs handshake communication with the second satellite through the second beam, and obtains the link environment and connection information, wherein the connection Information refers to information necessary to establish a data connection.
  • the switching method in satellite communication further includes the following steps: when the first satellite switches to a connection prohibited state in the target connection area, the terminal device connects to the second satellite through the second beam switching, and Disconnect from the first satellite. It should be noted that this step can be performed, for example, after the terminal device establishes a pre-connection with the second satellite, but the disclosure is not limited to this.
  • the first satellite is in a connection prohibited state, for example, the first satellite actively declares to suspend service, or the terminal device detects a high bit error rate, for example, the signal quality is greater than the low quality threshold of 3s or 5s.
  • the terminal device when the first satellite switches to the connection prohibited state, the terminal device is connected to the second satellite through the second beam, which is beneficial to achieving stable and continuous high-quality communication.
  • the switching method in satellite communication further includes the following steps: when the second satellite is in a connection prohibited state, remaining connected to the first satellite until the third satellite enters the target connection area. It should be noted that this step can be performed, for example, after the terminal device establishes a pre-connection with the second satellite, but the disclosure is not limited to this. In this way, the continuity of the communication connection between the terminal equipment and the satellite can be ensured.
  • the switching method in satellite communication further includes the following steps: when the first satellite leaves the target connection area and the second satellite is in a connection prohibited state, the terminal device remains connected to the first satellite until the third The satellite enters the target connection zone. It should be noted that this step can be performed, for example, after the terminal device establishes a pre-connection with the second satellite, but the disclosure is not limited to this.
  • the switching method in satellite communication further includes: the terminal device re-determines another first satellite in the connectable state from the target connection area based on the ephemeris information. satellite, and is connected to the other first satellite through a first beam.
  • the terminal device is configured with a phased array antenna radar, and the phased array antenna radar is used to transmit the first beam and the second beam.
  • Phased array antenna radar refers to scanning the array radar through phase control electronics, using a large number of individually controlled small antennas to arrange the units, and finally forming an antenna array, and each antenna unit is controlled by its own independent switch, thus forming Different phase beams.
  • the terminal device is configured with a phased array antenna radar, so that the terminal device can generate the ability to track and access satellites through beamforming technology.
  • FIG. 4 shows a schematic structural diagram of a communication device 400 according to an embodiment of the present disclosure.
  • the communication device 400 may be provided in a terminal device.
  • the communication device 400 includes a transceiver unit 401 and a processing unit 402 .
  • the transceiver unit 401 is configured to transmit at least a first beam and a second beam.
  • the processing unit 402 is communicatively connected to the transceiver unit 401, and is configured to perform the following steps: the terminal device connects to the first satellite through the first beam; the terminal device obtains the next second satellite that enters the target connection area, and the terminal device passes through the second The beam establishes a pre-connection with the second satellite; when the first satellite leaves the target connection area and the second satellite is in a connectable state, the terminal device switches to connect to the second satellite through the second beam and disconnects from the first satellite.
  • the communication device provided by the present disclosure can implement the switching method in satellite communication described in the present disclosure, but the implementation device of the switching method in satellite communication described in the present disclosure includes but is not limited to those listed in this embodiment.
  • the structure of the communication device all structural modifications and replacements of the prior art made based on the principles of the embodiments of the present disclosure are included in the protection scope of the present disclosure.
  • each unit in the communication device is only a division of logical functions. In actual implementation, they can be fully or partially integrated into a physical entity, or they can also be physically separated. These units can all be implemented in the form of software calling through processing components; they can also all be implemented in the form of hardware; some units can also be implemented in the form of software calling through processing components, and some units can be implemented in the form of hardware. In addition, all or part of these units can be integrated together or implemented independently.
  • the processing element described here may be an integrated circuit with signal processing capabilities.
  • the present disclosure also provides a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by a processor, the switching method described in the embodiment of the present disclosure is implemented.
  • the storage medium may be a computer-readable signal medium or a computer-readable storage medium.
  • the computer-readable storage medium may be, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or any combination thereof. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more conductors, a portable computer disk, a hard disk, RAM, ROM, erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.
  • a computer-readable storage medium may be any tangible medium that contains or stores a program for use by or in connection with an instruction execution system, apparatus, or device.
  • FIG. 5 shows a schematic structural diagram of an electronic device 500 according to an embodiment of the present disclosure.
  • the electronic device 500 in this embodiment includes a memory 510 and a processor 520 .
  • the memory 510 is used to store computer programs; preferably, the memory 510 includes various media that can store program codes, such as ROM, RAM, magnetic disks, U disks, memory cards, or optical disks.
  • memory 510 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) and/or cache memory.
  • Electronic device 500 may further include other removable/non-removable, volatile/non-volatile computer system storage media.
  • Memory 510 may include at least one program product having a set (eg, at least one) of program modules configured to perform the functions of embodiments of the present disclosure.
  • the processor 520 is connected to the memory 510 and is used to execute the computer program stored in the memory 510, so that the electronic device 500 executes the switching method described in the embodiment of the present disclosure.
  • the processor 520 can be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; it can also be a digital signal processor (Digital Signal Processor, for short) DSP), Application Specific Integrated Circuit (ASIC for short), Field Programmable Gate Array (FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, and discrete hardware components.
  • CPU Central Processing Unit
  • NP Network Processor
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the electronic device 500 in this embodiment may also include a display 530.
  • the display 530 is communicatively connected to the memory 510 and the processor 520, and is used to display the relevant GUI interactive interface of the switching method described in the embodiment of the present disclosure.
  • the switching method in satellite communication optimizes the switching strategy between the satellite and the ground terminal equipment when the satellite is running rapidly in orbit.
  • the terminal device switches to connect to the second satellite.
  • this method can reduce the number of handovers, thereby avoiding the problem of excessive network overhead caused by frequent handovers.
  • this method can reduce the weak signal connection time of the terminal device, which is beneficial to improving signal quality and transmission rate. Therefore, the embodiments of the present disclosure effectively overcome various shortcomings in the prior art and have high industrial application value.

Landscapes

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

Abstract

本公开提供一种卫星通信中的切换方法、通信装置、介质及电子设备。所述卫星通信中的切换方法包括：终端设备通过第一波束与第一卫星相连接；所述终端设备获取下一进入目标连接区的第二卫星，所述终端设备通过第二波束与所述第二卫星建立预连接；当所述第一卫星离开所述目标连接区且所述第二卫星处于可连接状态时，所述终端设备通过所述第二波束切换连接到所述第二卫星，并断开与所述第一卫星的连接。所述卫星通信中的切换方法能够减少切换次数，并减少终端设备的弱信号连接时间。

Description

卫星通信中的切换方法、通信装置、介质及电子设备
本申请要求于2022年8月23日递交的申请号为CN202211013847.4的中国专利申请的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开的实施例涉及一种卫星通信中的切换方法、通信装置、介质及电子设备。
背景技术
地球同步卫星长期以来用于移动通信，但由于地球同步卫星受限于同步卫星轨道(Geostationary Satellite Orbit，GSO)，因此可以在GSO中布置的卫星的数量是有限的。作为地球同步卫星的替代方案，已设计了使用非同步卫星轨道(Non Geostationary Satellite Orbit，NGSO)，例如，低地球轨道(Low Earth Orbit，LEO)中的卫星星座的通信系统，以向整个地球或者地球的大部分位置提供通信覆盖。由于低轨卫星在同一终端上空的暴露时间是有限的，同时，同一时间暴露在终端设备上空的可用低轨卫星可能有多颗，且均处于高速运动状态。例如，对于常见的低轨卫星，其绕地球轨道运行一周的时间大概为100分钟左右，该卫星对于一个终端设备来说，服务的时间大概在十分钟左右。因此，终端设备需要在不同星间进行切换。
发明内容
本公开的实施例提供了一种卫星通信中的切换方法、通信装置、介质及电子设备，以避免端星通信系统中存在的频繁切换导致带宽利用率低以及信号质量差影响传输速率的问题。
为实现上述目的及其他相关目的，本公开的第一方面提供一种卫星通信中的切换方法，包括：终端设备通过第一波束与第一卫星相连接；所述终端设备获取下一进入目标连接区的第二卫星，所述终端设备通过第二波束与所 述第二卫星建立预连接；当所述第一卫星离开所述目标连接区且所述第二卫星处于可连接状态时，所述终端设备通过所述第二波束切换连接到所述第二卫星，并断开与所述第一卫星的连接。
于所述第一方面的一实施例中，所述方法还包括：所述终端设备获取下一进入所述目标连接区的第三卫星，所述终端设备通过所述第一波束与所述第三卫星建立预连接；当所述第二卫星离开所述目标连接区且所述第三卫星处于可连接状态时，所述终端设备通过所述第一波束切换连接到所述第三卫星，并断开与所述第二卫星的连接。
于所述第一方面的一实施例中，终端设备通过第一波束与第一卫星相连接包括：终端设备获取多个备选卫星的信号强度，其中，多个所述备选卫星处于所述目标连接区内；根据信号强度从所述备选卫星中选取所述第一卫星；所述终端设备通过所述第一波束与所述第一卫星相连接。
于所述第一方面的一实施例中，根据信号强度从所述备选卫星中选取所述第一卫星包括：选取信号强度最强的所述备选卫星作为所述第一卫星。
于所述第一方面的一实施例中，所述终端设备获取下一进入目标连接区的第二卫星包括：所述终端设备通过所述第二波束探测获取下一进入所述目标连接区的卫星作为所述第二卫星，或所述终端设备通过卫星星历信息获取下一进入所述目标连接区的卫星作为所述第二卫星。
于所述第一方面的一实施例中，所述终端设备获取下一进入所述目标连接区的第三卫星包括：所述终端设备通过所述第一波束探测获取下一进入所述目标连接区的卫星作为所述第三卫星，或所述终端设备通过卫星星历信息获取下一进入所述目标连接区的卫星作为所述第三卫星。
于所述第一方面的一实施例中，所述卫星通信中的切换方法还包括：根据所述终端设备的当前定位确定所述目标连接区，其中，所述终端设备与位于所述目标连接区边界上的卫星的通信传输速率为第一传输速率，所述终端设备与位于所述终端设备上空最大仰角卫星的通信速率为第二传输速率，所述第一传输速率至少不低于所述第二传输速率的一半，且同一时刻所述目标连接区中至少包含两颗卫星。
于所述第一方面的一实施例中，所述终端设备通过第二波束与所述第二卫星建立预连接包括：所述终端设备通过所述第二波束与所述第二卫星进行 握手通信，并获取链路环境及连接信息。
于所述第一方面的一实施例中，所述方法还包括：当所述第一卫星在所述目标连接区内切换至连接禁止状态时，所述终端设备通过所述第二波束切换连接到所述第二卫星，并断开与所述第一卫星的连接。
于所述第一方面的一实施例中，所述方法还包括：当所述第一卫星离开所述目标连接区且所述第二卫星处于连接禁止状态时，所述终端设备保持与所述第一卫星相连接直到第三卫星进入所述目标连接区。
于所述第一方面的一实施例中，当所述第一卫星以及所述第二卫星均处于连接禁止状态时，所述方法还包括：所述终端设备根据星历信息重新从所述目标连接区中确定处于可连接状态的另一个第一卫星，并通过所述第一波束与所述另一个第一卫星相连接。
于所述第一方面的一实施例中，所述终端设备配置有相控阵天线，所述相控阵天线用于发送所述第一波束和所述第二波束。
本公开的第二方面提供一种通信装置，包括：收发单元，用于发射至少第一波束和第二波束；处理单元，被配置为执行以下步骤：终端设备通过第一波束与第一卫星相连接；所述终端设备获取下一进入目标连接区的第二卫星，所述终端设备通过第二波束与所述第二卫星建立预连接；当所述第一卫星离开所述目标连接区且所述第二卫星处于可连接状态时，所述终端设备通过所述第二波束切换连接到所述第二卫星，并断开与所述第一卫星的连接。
本公开的第三方面提供一种计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现本公开第一方面中任一项所述的切换方法。
本公开的第四方面提供一种电子设备，所述电子设备包括：存储器，存储有一计算机程序；处理器，与所述存储器通信相连，调用所述计算机程序时执行本公开第一方面中任一项所述的切换方法。
如上所述，本公开的实施例中提供的卫星通信中的切换方法、通信装置、介质及电子设备具有以下有益效果：
所述切换方法优化了卫星在轨道快速运行时与地面终端设备的切换策略。于所述切换方法中，第一卫星离开目标连接区且第二卫星处于可连接状态时，终端设备会切换为与第二卫星相连接。一方面，通过此种方式可以减 少切换次数，从而避免由于切换频繁而导致的网络开销过大的问题。另一方面，通过此种方式可以减少终端设备的弱信号连接时间，有利于提高信号质量和传输速率。
附图说明
图1A显示为本公开实施例中卫星通信场景的示例图。
图1B显示为本公开实施例所述卫星通信中的切换方法的流程图。
图2显示为本公开实施例所述卫星通信中的切换方法的若干步骤流程图。
图3显示为本公开实施例中终端设备与第一卫星相连接的流程图。
图4显示为本公开实施例所述通信装置的结构示意图。
图5显示为本公开实施例所述电子设备的结构示意图。
附图标记
400         通信装置
401         收发单元
402         处理单元
500         电子设备
510         存储器
520         处理器
530         显示器
S11～S13    步骤
S21～S22    步骤
S31～S33    步骤
具体实施方式
以下通过特定的具体实例说明本公开的实施方式，本领域技术人员可由本说明书所揭露的内容轻易地了解本公开的其他优点与功效。本公开还可以通过另外不同的具体实施方式加以实施或应用，本说明书中的各项细节也可以基于不同观点与应用，在没有背离本公开的精神下进行各种修饰或改变。需说明的是，在不冲突的情况下，以下实施例及实施例中的特征可以相互组合。
需要说明的是，以下实施例中所提供的图示仅以示意方式说明本公开的基本构想，图示中仅显示与本公开中有关的组件而非按照实际实施时的组件数目、形状及尺寸绘制，其实际实施时各组件的型态、数量及比例可为一种随意的改变，且其组件布局型态也可能更为复杂。此外，在本文中，诸如“第一”、“第二”等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。
终端设备的切换方案主要有两种。在第一种方案中，终端设备始终与上方最大仰角的低轨卫星连接，此种方式会导致终端设备频繁地切换与之连接的卫星，因而会产生大量协议包在卫星和终端设备之间交互。当网络规模较大、节点数较多时，协议包的数量会倍数增加，从而产生较大的网络开销，降低带宽资源利用率。在第二种方案中，终端设备始终保持与一个卫星连接直到该卫星不可用时再切换，此种方式在卫星远离终端设备上方时通信质量较差，影响传输速率。
常见的卫星通信系统包括用户设备(user equipment，UE)和网络设备。用户设备也可以被称为终端设备、用户终端、移动台等。网络设备可包括一个或多个卫星或地面站设备，地面站设备也可以被称为核心网设备。卫星可以为低地球轨道(low earth orbit，LEO)卫星(或称为低轨卫星)、非静止轨道(non-geostationary earth orbit，NGEO)卫星等。
本文中的终端设备包括各种具有无限无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备，具体可以指用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。终端设备还可以是卫星电话、蜂窝电话、智能手机、无线数据卡、无线调制解调器、机器类型通信设备、可以是无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备或可穿戴设备，虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、 无人驾驶(self-driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、5G网络或者未来通信网络中的终端设备等。
地面站设备例如为现有的移动通信架构(如5G网络的3GPP接入架构)的核心网(core network，CN)中的设备或未来移动通信架构中的核心网中的设备。
相关技术中，终端设备的切换方案主要有两种。在第一种方案中，终端设备始终与上方最大仰角的低轨卫星连接，此种方式会导致终端设备频繁地切换与之连接的卫星，因而会产生大量协议包在卫星和终端设备之间交互。当网络规模较大、节点数较多时，协议包的数量会倍数增加，从而产生较大的网络开销，降低带宽资源利用率。在第二种方案中，终端设备始终保持与一个卫星连接直到该卫星不可用时再切换，此种方式在卫星远离终端设备上方时通信质量较差，影响传输速率。至少针对上述问题，本公开的实施例提供一种卫星通信中的切换方法，该方法优化了卫星在轨道快速运行时与终端设备的切换策略。
图1A显示为本公开一实施例中卫星通信场景示意图。如图1A所示，本公开的实施例中的终端设备位于地面，包括但不限于手机、平板电脑等。终端设备可以通过波束成形技术探测、跟踪和接入卫星。优选地，终端设备具备至少两个波束，以实现对卫星的快速跟踪和调整。卫星A、B和C例如可以为低轨卫星，但本公开并不以此为限。目标连接区是指终端设备上方的一个区域，卫星处于该区域内的端星通信质量(也即，用户终端和卫星之间的通信质量)优于卫星处于该区域之外时的端星通信质量。本实施例中，目标连接区可以由卫星轨道、最佳切入点和最佳切出点所确定。应当理解的是，图1A仅示例性的示出了1个终端设备和3个卫星，但是具体应用中终端设备和卫星的数量并不限制于此。
接下来将以图1A所示场景为例，对本公开提供的卫星通信中的切换方法进行介绍。图1B显示为本实施例中切换方法的流程图。如图1B所示，本实施例提供的切换方法包括以下步骤S11至步骤S13。
S11，终端设备通过第一波束与第一卫星相连接。其中，第一卫星位于目 标连接区内，例如图1A中的卫星C。当终端设备与第一卫星连接之后，第一卫星为终端设备提供通信服务。
S12，终端设备获取下一进入目标连接区的第二卫星，并通过第二波束与第二卫星建立预连接。具体地，当第二卫星，例如图1A中的卫星B，经过最佳切入点而进入目标连接区时，终端设备通过第二波束与卫星预连接，此时系统进入预切换状态。
可选地，于步骤S12之前可以采用第二波束探测是否有卫星进入目标连接区。
S13，当第一卫星离开目标连接区且第二卫星处于可连接状态时，终端设备通过第二波束切换连接到第二卫星，并断开与第一卫星的连接。例如，当图1A中的卫星A运行至离开最佳切出点时，若卫星B处于可连接状态，则终端设备通过第二波束与卫星B相连接，并断开与卫星A的连接，此后第一波束不再指向卫星A。
根据以上描述可知，在本公开的实施例提供的切换方法中，第一卫星离开目标连接区且第二卫星处于可连接状态时，终端设备会切换为与第二卫星连接。一方面，相较于终端设备始终与上方最大仰角卫星连接的方案，本实施例提供的切换方法能够减少切换次数，有利于避免由于切换频繁而导致的网络开销过大的问题。另一方面，相较于终端设备始终保持与一个卫星连接直到该卫星不可用时再切换的方案，本实施例提供的切换方法可以减少终端设备的弱信号连接时间，有利于提高信号质量和传输速率。
请参阅图2，于本公开的一实施例中，该卫星通信中的切换方法还可以包括以下步骤S21和S22。
S21，终端设备获取下一进入目标连接区的第三卫星，终端设备通过第一波束与第三卫星建立预连接。具体地，在终端设备与第二卫星相连接以后，第一波束不再指向第一卫星。因此，可以利用第一波束探测是否有卫星进入目标连接区。在探测到第三卫星进入目标连接区时，终端设备通过第一波束与第三卫星预连接。
S22，当第二卫星离开目标连接区且第三卫星处于可连接状态时，终端设备通过第一波束切换连接到第三卫星，并断开与第二卫星的连接。
需要说明的是，上述步骤S21和S22例如可以在终端设备切换连接到第 二卫星后执行，但本公开并不以此为限。此外，以上仅示例性地介绍了终端设备与第一卫星、第二卫星和第三卫星的切换方法，但本公开并不以此为限。例如，在终端设备与第三卫星相连接以后，第二波束不再指向第二卫星；当探测到第四卫星进入目标连接区时，终端设备通过第二波束与第四卫星预连接；在第三卫星离开目标连接区且第四卫星处于可连接状态时，终端设备通过第二波束与第四卫星相连接，以此类推。
于本公开的一实施例中，第一卫星为终端设备初始连接的卫星，也即，终端设备此前未连接卫星，或者终端设备此前连接的卫星以及预连接的卫星均处于连接禁止状态。请参阅图3，本实施例中终端设备通过第一波束与第一卫星相连接包括以下步骤S31至步骤S33。
S31，终端设备获取多个备选卫星的信号强度，其中，多个备选卫星处于目标连接区内。备选卫星例如可以是终端设备附近所有可用的卫星。
S32，根据信号强度从备选卫星中选取第一卫星。例如，可以根据信号强度将各备选卫星进行排序，选取其中信号强度最强的一个作为第一卫星，但本公开并不以此为限。
S33，终端设备通过第一波束与第一卫星相连接。
以上步骤S31至S33提供了终端设备与卫星初始建立连接的方法，基于该方法能够使得终端设备与卫星建立初始连接。此后，终端设备可以采用以上实施例所提供的切换方法切换至其他卫星，从而实现持续稳定的端星通信。
于本公开的一实施例中，终端设备获取下一进入目标连接区的第二卫星包括：终端设备通过第二波束探测获取下一进入目标连接区的卫星作为第二卫星，或终端设备通过卫星星历信息获取下一进入目标连接区的卫星作为第二卫星。其中，卫星的星历信息指的是GPS测量中，卫星随时间而变化的精确位置或轨迹表。基于卫星的星历信息能够精确地计算、预测、描绘、跟踪卫星的时间、位置、速度等运行状态。在一些实施例中，卫星星历信息例如可以包括下列信息中的至少一种：卫星的轨道面的倾角、升交点的赤经、轨道椭圆长半轴、轨道椭圆的偏心率、近地点角距和卫星过近点时刻。
于本公开的一实施例中，终端设备获取下一进入目标连接区的第三卫星包括：终端设备通过第一波束探测获取下一进入目标连接区的卫星作为第三卫星，或终端设备通过卫星星历信息获取下一进入目标连接区的卫星作为第 三卫星。
于本公开的一实施例中，根据终端设备的当前定位确定目标连接区，其中，终端设备与位于目标连接区边界(也即，最佳切入点和最佳切出点)上的卫星的通信传输速率为第一传输速率，终端设备与位于终端设备上空最大仰角卫星的通信速率为第二传输速率，第一传输速率至少不低于第二传输速率的一半，且同一时刻目标连接区中至少包含两颗卫星。
需要说明的是，上述确定目标连接区的方法仅为本公开的一种可行方式，但本公开并不以此为限。
于本公开的一实施例中，终端设备通过第二波束与第二卫星建立预连接包括：终端设备通过第二波束与第二卫星进行握手通信，并获取链路环境及连接信息，其中，连接信息是指与建立数据连接相关的必要信息。
于本公开的一实施例中，卫星通信中的切换方法还包括以下步骤：当第一卫星在目标连接区内切换至连接禁止状态时，终端设备通过第二波束切换连接到第二卫星，并断开与第一卫星的连接。需要说明的是，该步骤例如可以在终端设备与第二卫星建立预连接以后执行，但本公开并不以此为限。其中，第一卫星处于连接禁止状态例如第一卫星主动声明暂停服务，或者终端设备检测出误码率较高，例如，信号质量大于3s或者5s的低质量阈值。
根据以上内容可知，本实施例在第一卫星切换至连接禁止状态时，终端设备通过第二波束与第二卫星相连接，有利于实现稳定且持续的高质量通信。
于本公开的一实施例中，卫星通信中的切换方法还包括以下步骤：当第二卫星处于连接禁止状态时，保持与第一卫星相连接直到第三卫星进入目标连接区。需要说明的是，该步骤例如可以在终端设备与第二卫星建立预连接以后执行，但本公开并不以此为限。通过此种方式能够保证终端设备与卫星之间通信连接的连续性。
于本公开的一实施例中，卫星通信中的切换方法还包括以下步骤：当第一卫星离开目标连接区且第二卫星处于连接禁止状态时，终端设备保持与第一卫星相连接直到第三卫星进入目标连接区。需要说明的是，该步骤例如可以在终端设备与第二卫星建立预连接以后执行，但本公开并不以此为限。
可选地，当第一卫星以及第二卫星均处于连接禁止状态时，卫星通信中的切换方法还包括：终端设备根据星历信息重新从目标连接区中确定处于可 连接状态的另一个第一卫星，并通过第一波束与该另一个第一卫星相连接。
于本公开的一实施例中，终端设备配置有相控阵天线雷达，该相控阵天线雷达用于发送第一波束和第二波束。相控阵天线雷达是指通过相位控制电子对阵列雷达进行扫描，利用大量个别控制的小型天线进行单元排列，最终形成天线阵面，并且每一个天线单元都由各自独立的开关进行控制，从而形成不同的相位波束。本实施例中，终端设备配置有相控阵天线雷达，使得终端设备可以通过波束成形技术产生跟踪接入卫星的能力。
需要说明的是，本公开提供的卫星通信中的切换方法的保护范围不限于本实施例列举的步骤执行顺序，凡是根据本公开的实施例的原理所做的现有技术的步骤增减、步骤替换所实现的方案都包括在本公开的保护范围内。
本公开的实施例还提供一种通信装置。图4显示为本公开一实施例中通信装置400的结构示意图，例如，该通信装置400可以设置在终端设备中。如图4所示，通信装置400包括收发单元401和处理单元402。收发单元401用于发射至少第一波束和第二波束。处理单元402与收发单元401通信相连，并且被配置为执行以下步骤：终端设备通过第一波束与第一卫星相连接；终端设备获取下一进入目标连接区的第二卫星，终端设备通过第二波束与第二卫星建立预连接；当第一卫星离开目标连接区且第二卫星处于可连接状态时，终端设备通过第二波束切换连接到第二卫星，并断开与第一卫星的连接。
需要说明的是，本公开提供的通信装置，可以实现本公开所述的卫星通信中的切换方法，但本公开所述的卫星通信中的切换方法的实现装置包括但不限于本实施例列举的通信装置的结构，凡是根据本公开的实施例的原理所做的现有技术的结构变形和替换，都包括在本公开的保护范围内。
另外应当理解的是，上述通信装置中各个单元的划分仅仅是一种逻辑功能的划分，实际实现时可以全部或部分集成到一个物理实体上，也可以物理上分开。这些单元可以全部以软件通过处理元件调用的形式实现；也可以全部以硬件的形式实现；还可以部分单元通过处理元件调用软件的形式实现，部分单元通过硬件的形式实现。此外，这些单元全部或部分可以集成在一起，也可以独立实现。这里所述的处理元件可以是一种集成电路，具有信号处理的能力。
本公开还提供一种计算机可读存储介质，其上存储有计算机程序，该计 算机程序被处理器执行时实现本公开实施例中所述的切换方法。
本公开中，可以采用一个或多个存储介质的任意组合。存储介质可以是计算机可读信号介质或者计算机可读存储介质。计算机可读存储介质例如可以是——但不限于——电、磁、光、电磁、红外线、或半导体的系统、装置或器件，或者任意以上的组合。计算机可读存储介质的更具体的例子(非穷举的列表)包括：具有一个或多个导线的电连接、便携式计算机盘、硬盘、RAM、ROM、可擦式可编程只读存储器(EPROM或闪存)、光纤、便携式紧凑盘只读存储器(CD-ROM)、光存储器件、磁存储器件、或者上述的任意合适的组合。在本文件中，计算机可读存储介质可以是任何包含或存储程序的有形介质，该程序可以被指令执行系统、装置或者器件使用或者与其结合使用。
本公开还提供一种电子设备。图5显示为本公开一实施例中电子设备500的结构示意图。如图5所示，本实施例中电子设备500包括存储器510和处理器520。
存储器510用于存储计算机程序；优选地，存储器510包括：ROM、RAM、磁碟、U盘、存储卡或者光盘等各种可以存储程序代码的介质。
具体地，存储器510可以包括易失性存储器形式的计算机系统可读介质，例如随机存取存储器(RAM)和/或高速缓存存储器。电子设备500可以进一步包括其它可移动/不可移动的、易失性/非易失性计算机系统存储介质。存储器510可以包括至少一个程序产品，该程序产品具有一组(例如至少一个)程序模块，这些程序模块被配置以执行本公开各实施例的功能。
处理器520与存储器510相连，用于执行存储器510存储的计算机程序，以使电子设备500执行本公开实施例中所述的切换方法。
优选地，处理器520可以是通用处理器，包括中央处理器(Central Processing Unit，简称CPU)、网络处理器(Network Processor，简称NP)等；还可以是数字信号处理器(Digital Signal Processor，简称DSP)、专用集成电路(Application Specific Integrated Circuit，简称ASIC)、现场可编程门阵列(Field Programmable Gate Array，简称FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。
优选地，本实施例中电子设备500还可以包括显示器530。显示器530 与存储器510和处理器520通信相连，用于显示本公开实施例中所述的切换方法的相关GUI交互界面。
综上所述，本公开实施例中提供的卫星通信中的切换方法优化了卫星在轨道快速运行时与地面终端设备的切换策略。于所述切换方法中，第一卫星离开目标连接区且第二卫星处于可连接状态时，终端设备会切换为与第二卫星相连接。一方面，通过此种方式可以减少切换次数，从而避免由于切换频繁而导致的网络开销过大的问题。另一方面，通过此种方式可以减少终端设备的弱信号连接时间，有利于提高信号质量和传输速率。因此，本公开的实施例有效克服了现有技术中的种种缺点而具高度产业利用价值。
上述实施例仅例示性说明本公开的原理及其功效，而非用于限制本公开。任何熟悉此技术的人士皆可在不违背本公开的精神及范畴下，对上述实施例进行修饰或改变。因此，举凡所属技术领域中具有通常知识者在未脱离本公开的实施例所揭示的精神与技术思想下所完成的一切等效修饰或改变，仍应由本公开的权利要求所涵盖。

Claims (15)

  1. 一种卫星通信中的切换方法，包括：
    终端设备通过第一波束与第一卫星相连接；
    所述终端设备获取下一进入目标连接区的第二卫星，所述终端设备通过第二波束与所述第二卫星建立预连接；以及
    当所述第一卫星离开所述目标连接区且所述第二卫星处于可连接状态时，所述终端设备通过所述第二波束切换连接到所述第二卫星，并断开与所述第一卫星的连接。
  2. 根据权利要求1所述的方法，还包括：
    所述终端设备获取下一进入所述目标连接区的第三卫星，所述终端设备通过所述第一波束与所述第三卫星建立预连接；以及
    当所述第二卫星离开所述目标连接区且所述第三卫星处于可连接状态时，所述终端设备通过所述第一波束切换连接到所述第三卫星，并断开与所述第二卫星的连接。
  3. 根据权利要求1或2所述的方法，其中，终端设备通过第一波束与第一卫星相连接包括：
    终端设备获取多个备选卫星的信号强度，其中，多个所述备选卫星处于所述目标连接区内；
    根据信号强度从所述备选卫星中选取所述第一卫星；以及
    所述终端设备通过所述第一波束与所述第一卫星相连接。
  4. 根据权利要求3所述的方法，其中，根据信号强度从所述备选卫星中选取所述第一卫星包括：选取信号强度最强的所述备选卫星作为所述第一卫星。
  5. 根据权利要求1-4任一项所述的方法，其中，所述终端设备获取下一进入目标连接区的第二卫星包括：
    所述终端设备通过所述第二波束探测获取下一进入所述目标连接区的卫星作为所述第二卫星，或所述终端设备通过卫星星历信息获取下一进入所述目标连接区的卫星作为所述第二卫星。
  6. 根据权利要求2所述的方法，其中，所述终端设备获取下一进入所述目标连接区的第三卫星包括：
    所述终端设备通过所述第一波束探测获取下一进入所述目标连接区的卫星作为所述第三卫星，或所述终端设备通过卫星星历信息获取下一进入所述目标连接区的卫星作为所述第三卫星。
  7. 根据权利要求1-6任一项所述的方法，还包括：根据所述终端设备的当前定位确定所述目标连接区，其中，
    所述终端设备与位于所述目标连接区边界上的卫星的通信传输速率为第一传输速率，所述终端设备与位于所述终端设备上空最大仰角卫星的通信速率为第二传输速率，所述第一传输速率至少不低于所述第二传输速率的一半，且同一时刻所述目标连接区中至少包含两颗卫星。
  8. 根据权利要求1-7任一项所述的方法，其中，所述终端设备通过所述第二波束与所述第二卫星建立预连接包括：所述终端设备通过所述第二波束与所述第二卫星进行握手通信，并获取链路环境及连接信息。
  9. 根据权利要求1-8任一项所述的方法，还包括：
    当所述第一卫星在所述目标连接区内切换至连接禁止状态时，所述终端设备通过所述第二波束切换连接到所述第二卫星，并断开与所述第一卫星的连接。
  10. 根据权利要求1-9任一项所述的方法，还包括：
    当所述第一卫星离开所述目标连接区且所述第二卫星处于连接禁止状态时，所述终端设备保持与所述第一卫星相连接直到第三卫星进入所述目标连接区。
  11. 根据权利要求10所述的方法，其中，当所述第一卫星以及所述第二卫星均处于连接禁止状态时，所述方法还包括：
    所述终端设备根据星历信息重新从所述目标连接区中确定处于可连接状态的另一个第一卫星，并通过所述第一波束与所述另一个第一卫星相连接。
  12. 根据权利要求1-11任一项所述的方法，其中，所述终端设备配置有相控阵天线，所述相控阵天线用于发送所述第一波束和所述第二波束。
  13. 一种通信装置，包括：
    收发单元，用于发射至少第一波束和第二波束；
    处理单元，被配置为执行以下步骤：
    终端设备通过第一波束与第一卫星相连接；
    所述终端设备获取下一进入目标连接区的第二卫星，所述终端设备通过第二波束与所述第二卫星建立预连接；以及
    当所述第一卫星离开所述目标连接区且所述第二卫星处于可连接状态时，所述终端设备通过所述第二波束切换连接到所述第二卫星，并断开与所述第一卫星的连接。
  14. 一种计算机可读存储介质，其上存储有计算机程序，其中：所述计算机程序被处理器执行时实现权利要求1至12中任一项所述的切换方法。
  15. 一种电子设备，包括：
    存储器，存储有计算机程序；以及
    处理器，与所述存储器通信相连，调用所述计算机程序时执行权利要求1至12中任一项所述的切换方法。
PCT/CN2022/143321 2022-08-23 2022-12-29 卫星通信中的切换方法、通信装置、介质及电子设备 WO2024040839A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211013847.4A CN115396011A (zh) 2022-08-23 2022-08-23 卫星通信中的切换方法、通信装置、介质及电子设备
CN202211013847.4 2022-08-23

Publications (1)

Publication Number Publication Date
WO2024040839A1 true WO2024040839A1 (zh) 2024-02-29

Family

ID=84120500

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/143321 WO2024040839A1 (zh) 2022-08-23 2022-12-29 卫星通信中的切换方法、通信装置、介质及电子设备

Country Status (2)

Country Link
CN (1) CN115396011A (zh)
WO (1) WO2024040839A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115396011A (zh) * 2022-08-23 2022-11-25 湖北星纪时代科技有限公司 卫星通信中的切换方法、通信装置、介质及电子设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110830104A (zh) * 2019-11-19 2020-02-21 北京前沿探索深空科技有限公司 低轨卫星网络结构、组网方法以及控制器和介质
CN111147120A (zh) * 2019-12-03 2020-05-12 南京中科晶上通信技术有限公司 卫星间切换路径的确定方法、装置、终端及存储介质
CN113079546A (zh) * 2020-01-03 2021-07-06 大唐移动通信设备有限公司 一种低轨卫星间切换方法和装置
CN113133062A (zh) * 2019-12-30 2021-07-16 大唐移动通信设备有限公司 星间切换方法、装置、终端及网络侧设备
US20220217607A1 (en) * 2019-03-26 2022-07-07 Huawei Technologies Co., Ltd. Handover method and apparatus in satellite communications
CN115396011A (zh) * 2022-08-23 2022-11-25 湖北星纪时代科技有限公司 卫星通信中的切换方法、通信装置、介质及电子设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220217607A1 (en) * 2019-03-26 2022-07-07 Huawei Technologies Co., Ltd. Handover method and apparatus in satellite communications
CN110830104A (zh) * 2019-11-19 2020-02-21 北京前沿探索深空科技有限公司 低轨卫星网络结构、组网方法以及控制器和介质
CN111147120A (zh) * 2019-12-03 2020-05-12 南京中科晶上通信技术有限公司 卫星间切换路径的确定方法、装置、终端及存储介质
CN113133062A (zh) * 2019-12-30 2021-07-16 大唐移动通信设备有限公司 星间切换方法、装置、终端及网络侧设备
CN113079546A (zh) * 2020-01-03 2021-07-06 大唐移动通信设备有限公司 一种低轨卫星间切换方法和装置
CN115396011A (zh) * 2022-08-23 2022-11-25 湖北星纪时代科技有限公司 卫星通信中的切换方法、通信装置、介质及电子设备

Also Published As

Publication number Publication date
CN115396011A (zh) 2022-11-25

Similar Documents

Publication Publication Date Title
US11876602B2 (en) Communication method, apparatus, and system based on satellite network
CN110267327B (zh) 业务传输方法及装置
WO2020098627A1 (zh) 一种卫星通信的方法、装置及系统
CN105682111B (zh) 一种波束切换的方法、移动卫星终端及关口站
KR101264217B1 (ko) 데이터 포워딩 방법 및 장치
US11930423B2 (en) Communication method and communications apparatus
US9980215B2 (en) System and method for access point selection with evolved packet data gateway
WO2020000203A1 (en) Dynamic route selection in integrated access and backhaul system
US20050130658A1 (en) Handoff apparatus, systems, and methods
CN111800830A (zh) 一种通信方法及装置
WO2020244563A1 (zh) 用于切换的方法和装置
KR20190018242A (ko) 4g/5g 동시 등록된 이동 통신 단말을 위한 네트워크 이동시 데이터 동기화 제공 방안
WO2024040839A1 (zh) 卫星通信中的切换方法、通信装置、介质及电子设备
WO2022152043A1 (zh) 一种定位方法及装置
US20240031012A1 (en) Wireless communication method and apparatus
JP7013423B2 (ja) ハンドオーバーでのアップリンクベアラーバインディング
US20240015606A1 (en) Method and apparatus for handover
EP4278742A1 (en) Signalling framework for virtual transmission-reception point localization in wireless networks
WO2021134756A1 (zh) 一种链路切换方法及装置、通信设备
US20220295441A1 (en) Method for rapid location reporting between ue and base station
WO2024026640A1 (en) Apparatus, method, and computer program
CN116367242A (zh) 核心网切换方法、装置及通信设备
TW201023566A (en) Gateway module, communication method, and computer program product
KR20190061021A (ko) 데이터를 전송하는 방법, 수신단 설비 및 발송단 설비
WO2023191769A1 (en) Method for provisioning of conditional pscell change execution condition and measurement configuration after conditional configuration execution

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22956370

Country of ref document: EP

Kind code of ref document: A1