WO2023071802A1 - 卫星通信的方法和装置 - Google Patents

卫星通信的方法和装置 Download PDF

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Publication number
WO2023071802A1
WO2023071802A1 PCT/CN2022/124891 CN2022124891W WO2023071802A1 WO 2023071802 A1 WO2023071802 A1 WO 2023071802A1 CN 2022124891 W CN2022124891 W CN 2022124891W WO 2023071802 A1 WO2023071802 A1 WO 2023071802A1
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WO
WIPO (PCT)
Prior art keywords
information
terminal device
duration
timer
network device
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PCT/CN2022/124891
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English (en)
French (fr)
Inventor
陈莹
赵斐然
杨若男
王俊
周建伟
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华为技术有限公司
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Publication of WO2023071802A1 publication Critical patent/WO2023071802A1/zh

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    • 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
    • H04B7/18513—Transmission in a satellite or space-based system
    • 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
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity

Definitions

  • the present application relates to the communication field, and more particularly, to a satellite communication method and device.
  • satellite communication Compared with terrestrial communication, satellite communication has unique advantages, for example, it can provide wider coverage, satellite base stations are not easily damaged by external forces caused by natural disasters, and provide more data transmission for the fifth generation (5G) communication resources, provide better communication services, and improve network speed, etc. Therefore, supporting ground and satellite communications at the same time is an inevitable trend of 5G communications in the future. It has great benefits in terms of wide coverage, reliability, multiple connections, and high throughput.
  • 5G fifth generation
  • satellite communication has been discussed in the 3rd Generation Partnership Project (3GPP) as one of the application scenarios of 5G communication, but the current discussion and technical enhancement are mainly aimed at solving the problem of long transmission distance.
  • 3GPP 3rd Generation Partnership Project
  • the current discussion and technical enhancement are mainly aimed at solving the problem of long transmission distance.
  • satellite communication needs to provide communication services with global coverage. Due to the limited on-board processing capacity of satellites, the communication beams that can be provided at the same time are limited, and communication services cannot be provided for the target area or the whole world at the same time.
  • the present application provides a satellite communication method and device, which help to provide a wider range of communication services, reduce the complexity of terminal equipment, and improve user experience.
  • a method for satellite communication including: a terminal device receives first information, the first information is used to determine a first duration, and the first duration is used to indicate that the first beam stops serving and the second beam provides service Duration, the first beam and the second beam are satellite beams; the terminal device uses the second beam to communicate with the network device according to the first duration.
  • the terminal device by sending the first information to the terminal device, the terminal device can determine the duration from the stop of the service of the first beam to the service of the second beam according to the first information, and use the second beam of the satellite to communicate with the network device , help to provide a wider range of communication services, reduce the complexity of terminal equipment, and improve user experience.
  • the first information includes a first timer, and the first timer is used to indicate the first duration.
  • the first information includes a second timer and a third timer
  • the second timer is used to indicate the service duration of the first beam
  • the third timer is used to indicate the duration of one cycle of the first beam
  • the above method further includes: the terminal device determines the First time.
  • the foregoing method further includes: the terminal device does not detect the scheduling information from the network device within a duration of the first duration.
  • the terminal device by sending the first information to the terminal device, the terminal device can determine the time period from the first beam stop serving to the second beam providing service according to the first information, so that the terminal device can not Detect scheduling information, so as to enter the power saving mode, which helps to reduce the complexity and power consumption of the terminal.
  • the network device is located on a satellite, and the above method further includes: the terminal device receives GNSS positioning information and ephemeris information of the second beam, and the second beam The ephemeris information is used to indicate the ephemeris information when the second beam provides services for the terminal device; the terminal device synchronizes with the network device according to the GNSS positioning information and the ephemeris information.
  • the network device is located on the ground, and the above method further includes: the terminal device receives GNSS positioning information, ephemeris information of the second beam, and public timing advance information , the ephemeris information of the second beam is used to indicate the ephemeris information when the second beam provides services for the terminal device; the terminal device synchronizes with the network device according to the GNSS positioning information, ephemeris information and public timing advance information.
  • the above method further includes: the terminal device receives scheduling information corresponding to the second beam.
  • the first beam corresponds to the first bandwidth configuration
  • the second beam corresponds to the second bandwidth configuration
  • the first bandwidth configuration is the same as the second bandwidth configuration
  • the first beam corresponds to the first bandwidth configuration
  • the second beam corresponds to the second bandwidth configuration
  • the first bandwidth configuration is different from the second bandwidth configuration
  • the above method further includes: the terminal device acquires a first period, the first period is used to indicate the period of the first duration; the terminal device uses the second beam according to the first duration Communicating with the network device includes: the terminal device communicates with the network device using the second beam according to the first duration and the first period.
  • the terminal device enables the first duration to work for a period of time by acquiring the cycle information of the first duration, which reduces signaling overhead and improves configuration flexibility.
  • the above method further includes: the terminal device receives the control information, the terminal device activates the first timer according to the control information, or the terminal device activates the second timer and the second timer according to the control information. Third timer.
  • a method for satellite communication including: a network device determines first information, the first information is used by a terminal device to determine a first duration, and the first duration is used to instruct the first beam to stop serving and the second beam to provide The duration of the service, the first beam and the second beam are satellite beams; the network device sends the first information to the terminal device.
  • the terminal device by sending the first information to the terminal device, the terminal device can determine the duration from the stop of the service of the first beam to the service of the second beam according to the first information, and use the second beam of the satellite to communicate with the network device , help to provide a wider range of communication services, reduce the complexity of terminal equipment, and improve user experience.
  • the first information includes a first timer, and the first timer is used to indicate the first duration.
  • the first information includes a second timer and a third timer
  • the second timer is used to indicate the service duration of the first beam
  • the third timer is used to indicate the duration of one cycle of the first beam.
  • the above method further includes: the network device does not send scheduling information to the terminal device within the duration of the first duration.
  • the terminal device by sending the first information to the terminal device, the terminal device can determine the length of time from when the first beam stops serving to when the second beam provides service according to the first information, so that the terminal device can not stop within the duration of the timer. Detect scheduling information, so as to enter the power saving mode, which helps to reduce the complexity and power consumption of the terminal.
  • the network device is located on a satellite, and the above method further includes: the network device sends GNSS positioning information and ephemeris information of the second beam, and the second beam's The ephemeris information is used to indicate the ephemeris information when the second beam provides services for the terminal device, and the GNSS positioning information and the ephemeris information are used for synchronizing the terminal device with the network device.
  • the network device is located on the ground, and the above method further includes: the network device sends GNSS positioning information, ephemeris information of the second beam, and public timing advance information , the ephemeris information of the second beam is used to indicate the ephemeris information when the second beam provides services for the terminal device, and the GNSS positioning information, ephemeris information and public timing advance information are used for the synchronization between the terminal device and the network device.
  • the foregoing method further includes: the terminal device receives scheduling information corresponding to the second beam.
  • the first beam corresponds to the first bandwidth configuration
  • the second beam corresponds to the second bandwidth configuration
  • the first bandwidth configuration is the same as the second bandwidth configuration
  • the first beam corresponds to the first bandwidth configuration
  • the second beam corresponds to the second bandwidth configuration
  • the first bandwidth configuration is different from the second bandwidth configuration
  • the foregoing method further includes: the network device sending a first period, where the first period is used to indicate a period of the first duration.
  • the above method further includes: the network device sends control information, the control information is used to activate the first timer, or the control information is used to activate the second timer and the second timer. Three timers.
  • a satellite communication device including: a transceiver unit, configured to receive first information, the first information is used to determine a first duration, and the first duration is used to instruct the first beam to stop serving the second beam
  • the duration of service provision, the first beam and the second beam are satellite beams
  • the processing unit is configured to use the second beam to communicate with the network device according to the first duration.
  • the first information includes a first timer, and the first timer is used to indicate the first duration.
  • the first information includes a second timer and a third timer
  • the second timer is used to indicate the service duration of the first beam
  • the third timer is used to indicate the duration of one cycle of the first beam
  • the processing unit is specifically configured to determine the duration of the first beam according to the duration of the service provided by the first beam and the duration of one cycle of the first beam. for a while.
  • the processing unit is further configured not to detect scheduling information from the network device within the duration of the first duration.
  • the network equipment is located on the satellite, and the transceiver unit is also used to receive GNSS positioning information and ephemeris information of the second beam, and the ephemeris information of the second beam
  • the ephemeris information is used to indicate ephemeris information when the second beam provides services for the terminal device; the processing unit is also used for the terminal device to synchronize with the network device according to the GNSS positioning information and ephemeris information.
  • the network device is located on the ground, and the transceiver unit is also used to receive GNSS positioning information, ephemeris information of the second beam, and public timing advance information,
  • the ephemeris information of the second beam is used to indicate the ephemeris information when the second beam provides services for the terminal equipment;
  • the processing unit is also used to synchronize with the network equipment according to the GNSS positioning information, ephemeris information and public timing advance information.
  • the transceiver unit is further configured to receive scheduling information corresponding to the second beam.
  • the first beam corresponds to the first bandwidth configuration
  • the second beam corresponds to the second bandwidth configuration
  • the first bandwidth configuration is the same as the second bandwidth configuration
  • the first beam corresponds to the first bandwidth configuration
  • the second beam corresponds to the second bandwidth configuration
  • the first bandwidth configuration is different from the second bandwidth configuration
  • the transceiver unit is further configured to acquire a first period, and the first period is used to indicate a period of the first duration; the processing unit is specifically used for the terminal device to The duration and first period communicate with network devices using the second beam.
  • the transceiver unit is further configured to receive control information, and the processing unit is further configured to activate the first timer according to the control information, or the processing unit is further configured to activate the first timer according to the control information, or the processing unit is further configured to The control information activates the second timer and the third timer.
  • a satellite communication device including: a processing unit configured to determine first information, the first information is used by a terminal device to determine a first duration, and the first duration is used to instruct the first beam to stop serving until the second The service duration of the two beams, the first beam and the second beam are satellite beams; the transceiver unit is used to send the first information to the terminal equipment.
  • the first information includes a first timer, and the first timer is used to indicate the first duration.
  • the first information includes a second timer and a third timer
  • the second timer is used to indicate the service duration of the first beam
  • the third timer is used to indicate the duration of one cycle of the first beam.
  • the transceiver unit is further configured not to send scheduling information to the terminal device within the duration of the first duration.
  • the network equipment is located on the satellite, and the transceiver unit is also used to send the global navigation satellite system GNSS positioning information and the ephemeris information of the second beam, and the ephemeris information of the second beam
  • the ephemeris information is used to indicate ephemeris information when the second beam provides services for the terminal device, and the GNSS positioning information and ephemeris information are used for synchronizing the terminal device with the network device.
  • the network equipment is located on the ground, and the transceiver unit is also used to send the global navigation satellite system GNSS positioning information, the ephemeris information of the second beam and the public timing advance information,
  • the ephemeris information of the second beam is used to indicate the ephemeris information when the second beam provides services for the terminal device, and the GNSS positioning information, ephemeris information and public timing advance information are used for synchronizing the terminal device with the network device.
  • the transceiver unit is further configured to receive scheduling information corresponding to the second beam.
  • the first beam corresponds to the first bandwidth configuration
  • the second beam corresponds to the second bandwidth configuration
  • the first bandwidth configuration is the same as the second bandwidth configuration
  • the first beam corresponds to the first bandwidth configuration
  • the second beam corresponds to the second bandwidth configuration
  • the first bandwidth configuration is different from the second bandwidth configuration
  • the transceiver unit is further configured to send a first period, where the first period is used to indicate a period of the first duration.
  • the transceiver unit is further used for the network device to send control information, the control information is used to activate the first timer, or the control information is used to activate the second timer and the first timer. Three timers.
  • a communication device including: a processor, the processor is coupled with a memory, and the memory is used to store programs or instructions, and when the programs or instructions are executed by the processor, the device implements the first or second aspect. Any one of the two aspects and methods in various implementation manners thereof.
  • processors there are one or more processors, and one or more memories.
  • the memory may be integrated with the processor, or the memory may be separated from the processor.
  • a communication system including a terminal device and a network device.
  • the terminal device is configured to implement the method in each implementation manner in the above first aspect
  • the network device is configured to implement the method in each implementation manner in the above second aspect.
  • the communication system further includes other devices that interact with the communication device in the solutions provided by the embodiments of the present application.
  • a computer program product includes: computer program code, when the computer program code is run on a computer, it causes the computer to execute the methods in the above aspects.
  • a computer-readable medium stores program codes, and when the computer program codes are run on a computer, the computer is made to execute the methods in the above aspects.
  • a ninth aspect provides a chip system, including a memory and a processor, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the communication device installed with the chip system executes the above-mentioned Any aspect from the first aspect to the fifth aspect and a method in a possible implementation thereof.
  • the chip system may include an input chip or interface for sending information or data, and an output chip or interface for receiving information or data.
  • FIG. 1 is a schematic diagram of a multi-beam satellite communication system according to an embodiment of the present application.
  • Fig. 2 is an example application scenario of the satellite network according to the embodiment of the present application.
  • Fig. 3 is a schematic diagram of one satellite providing multiple beams according to an embodiment of the present application.
  • Fig. 4 is a schematic diagram of an example of the satellite communication method of the present application.
  • Fig. 5 is a schematic diagram of a specific example of the satellite communication method of the present application.
  • FIG. 6 is a schematic diagram of an example of the same beam position or beam direction being served by beams of different frequency bands at different times in the present application.
  • FIG. 7 is a schematic diagram of an example of a configuration manner of a timer in the present application.
  • FIG. 8 is a schematic diagram of an example of the same beam position or beam direction being served by beams of different frequency bands at the same time in the present application.
  • FIG. 9 is a schematic diagram of another example of a configuration manner of a timer in the present application.
  • Fig. 10 is a schematic diagram of an example of multi-beam coordinated service of multi-satellite in the present application.
  • Fig. 11 is a schematic diagram of another example of a specific example of the satellite communication method of the present application.
  • Fig. 12 is a schematic diagram of another example of the configuration mode of the timer in the present application.
  • Fig. 13 is a schematic configuration diagram of an example of satellite communication equipment of the present application.
  • Fig. 14 is a schematic configuration diagram of an example of the satellite communication device of the present application.
  • NTN Non-terrestrial network
  • ICaN integrated communication and navigation
  • GNSS global navigation satellite system
  • the satellite communication system can be integrated with the traditional mobile communication system.
  • the mobile communication system may be a fourth generation (4th generation, 4G) communication system (for example, a long term evolution (long term evolution, LTE) system), a worldwide interconnection microwave access (worldwide interoperability for microwave access, WiMAX) communication system, the fifth generation (5th generation, 5G) communication system (for example, new radio (NR) system), and future mobile communication systems, etc.
  • 4G fourth generation
  • LTE long term evolution
  • WiMAX worldwide interconnection microwave access
  • 5th generation, 5G for example, new radio (NR) system
  • future mobile communication systems etc.
  • Fig. 1 shows a schematic diagram of a multi-beam satellite communication system according to an embodiment of the present application.
  • the beams of satellites are divided into service beams and broadcast beams.
  • the broadcast beam carries some cell-level system information for terminal devices to perform random access, and the initial access of terminal devices can be completed in the broadcast beam.
  • the broadcast beam can be used as a wide beam to cover all service beams in a cell, or it can be used as a narrow beam to cover different data beams at different times sequentially in a periodic scanning manner.
  • adjacent service beams, service beams and broadcast beams may use different frequency bands, which are generally called bandwidth parts (BWP).
  • the energy cannot be concentrated, which will cause the terminal device to receive a weak signal, and eventually cause the decoding of the broadcast signal to fail.
  • the number of beams that satellites can provide is also limited. Due to the large coverage area of satellites, the possible business beams cannot cover all areas at the same time.
  • the satellite communication system discussed in the existing standards does not support the beam-hopping technology for the time being. In the case of limited processing capacity on the satellite, it cannot provide a wider range of communication services, and ultimately cannot achieve global coverage.
  • this application divides the target area into multiple wave positions or beam directions for satellite communication scenarios, and through beam hopping, that is, beams on satellites at different times provide communication services for terminal devices in different wave positions or beam directions , not only can achieve full coverage of the target area, but also help to reduce the complexity of terminal equipment and improve user experience.
  • the satellite communication system consists of three parts: the satellite terminal, the ground terminal, and the user terminal.
  • the satellite terminal played the role of a relay station in the air, that is, it amplified the electromagnetic wave sent by the ground station and then sent it back to another ground station.
  • the satellite body includes two subsystems: on-board equipment and satellite parent body.
  • the ground station is the interface between the satellite system and the ground public network. Ground users can also enter and exit the satellite system through the ground station to form a link.
  • the ground station also includes the ground satellite control center, and its tracking, telemetry and command stations.
  • the client end refers to various user terminal devices.
  • satellite communications tend to adopt cellular technology, for example, moving base stations (BS) to satellites.
  • BS moving base stations
  • beamforming massive multiple-input multiple-output (MIMO), and full-dimensional MIMO (full-dimension MIMO, FD-MIMO) are discussed in 5G systems.
  • array antenna digital beamforming (digital beamforming), analog beamforming (analog beamforming) and other antenna technologies.
  • Network devices in the 5G system can interact with user equipment through beamforming technology.
  • a network device can usually form multiple downlink (down link, DL) transmission beams (transmit beam, Tx beam), and send downlink signals to terminal devices within the coverage of the beam on one or more DL Tx beams.
  • the terminal device can receive through a receive beam (receive beam, Rx beam) or an omnidirectional antenna to obtain a larger array gain.
  • Rx beam receive beam
  • omnidirectional antenna omnidirectional antenna
  • the terminal equipment In satellite communication, the terminal equipment needs to first realize the time synchronization with the network equipment. In the case of synchronization, according to the agreement agreed in advance, the network equipment and the terminal equipment can analyze the specific content contained in the signal. The first thing the terminal equipment needs to detect is the master synchronization signal.
  • the network device first sends a synchronization signal block (Synchronization Signal Block, SSB) beam to the terminal device, and the terminal device scans with a wide beam. After both UE and BS scan once, confirm the narrow beam range of the network device. and wide beams for end devices.
  • SSB Synchronization Signal Block
  • the repetition period of SSB can be 5ms, and each period contains one SSB. Therefore, the terminal device can acquire the 5ms timing of the cell by capturing the primary synchronization signal (primary synchronization signal, PSS).
  • PSS primary synchronization signal
  • an information exchange mechanism for devices not connected to the network to establish a connection with the network. Since the random access process is carried by a random access channel (RACH), RA and RACH are often used together in protocols and spoken language. It is divided into contention-based random access and non-contention-based random access.
  • the contention-based random access is generally divided into four steps, and each step corresponds to a message: including message 1, message 2, message 3, and message 4, which carry different signaling or information respectively. Random access based on non-contention only has the first two steps.
  • 2-step random access it consists of message A and message B, where message A includes the preamble and the first data information (for example, similar to message 1 and message 3 in 4-step random access), and message B Including contention resolution and uplink scheduling (such as message 2 and message 4 in 4-step random access).
  • Fig. 2 shows an example application scenario of the satellite network according to the embodiment of the present application.
  • the ground mobile terminal accesses the network through an air interface (the air interface may be various types of air interfaces, for example, 5G air interface).
  • Access network equipment can be deployed on satellites or on the ground, and connected to the core network on the ground through wireless links.
  • wireless links between satellites to complete signaling interaction and user data transmission between access network devices.
  • Terminal equipment including mobile equipment supporting the new air interface, which can access the satellite network through the air interface and initiate calls, surf the Internet and other services.
  • Access network equipment It mainly provides wireless access services, dispatches wireless resources to access terminals, and provides reliable wireless transmission protocols and data encryption protocols.
  • Core network user access control, mobility management, session management, user security authentication, billing and other services. It consists of multiple functional units, which can be divided into functional entities of the control plane and the data plane.
  • the access and mobility management function (AMF) is responsible for user access management, security authentication, and mobility management.
  • the user plane function (UPF) is responsible for managing user plane data transmission, traffic statistics and other functions.
  • Ground station responsible for forwarding signaling and business data between the satellite base station and the core network.
  • Air interface the wireless link between the terminal and the base station.
  • Xn interface the interface between the base station and the base station, mainly used for signaling interaction such as handover.
  • NG connection the interface between the base station and the core network, which mainly exchanges signaling such as the non-access-stratum (NAS) of the core network, and user service data.
  • NAS non-access-stratum
  • This application is applied to communication systems such as 5G, involving wireless access network elements such as UEs, base stations, and ground stations, and performing uplink and downlink data communication based on wireless communication protocols.
  • the access network equipment is not limited to satellite base stations, and the access network equipment may also be deployed on high-altitude platforms, satellites, or ground.
  • the access network device may be an evolved base station (evolutional Node B, eNB or eNodeB) in LTE; or a base station in a 5G network or a future evolved public land mobile network (public land mobile network, PLMN), broadband network service A gateway (broadband network gateway, BNG), an aggregation switch, or a non-third generation partnership project (3rd generation partnership project, 3GPP) access device, etc., are not specifically limited in this embodiment of the present application.
  • eNB evolved Node B
  • eNodeB evolved public land mobile network
  • PLMN public land mobile network
  • BNG broadband network gateway
  • 3GPP non-third generation partnership project
  • the access network equipment in this embodiment of the present application may include various forms of base stations, for example: macro base stations, micro base stations (also called small stations), relay stations, access points, next-generation base stations (gNodeB, gNB ), a baseband unit (baseBand unit, BBU), a transmission point (transmitting and receiving point, TRP), a transmitting point (transmitting point, TP), a mobile switching center, etc., which are not specifically limited in this embodiment of the present application.
  • the satellite mentioned in the embodiment of the present application may also be a satellite base station, or a network-side device carried on a satellite.
  • the terminal equipment mentioned in the embodiment of this application includes various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems with unlimited communication functions, and can specifically refer to user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device.
  • user equipment user equipment, UE
  • access terminal subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, 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 communication device, may be a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (wireless local loop) 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 (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 communication network terminal equipment etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • Fig. 3 is a schematic diagram of one satellite providing multiple beams according to an embodiment of the present application.
  • one satellite can provide multiple beams, including at least one broadcast beam and multiple service beams.
  • One possible scenario is that the sizes of the broadcast beam and the service beam are different, and multiple service beams are beam-hopped together in an adjacent manner.
  • the broadcast beam covers all the service beams.
  • the broadcast beams and service beams have the same size.
  • the number of broadcast beams is the same as the number of service beams, and the broadcast beams and service beams perform beam hopping in the same way, where , multiple broadcast beams or multiple service beams are not necessarily adjacent to each other, and periodic or aperiodic beam hopping can be performed according to actual business conditions.
  • Fig. 4 shows a schematic diagram of an example of the satellite communication method of the present application.
  • the terminal device receives first information, where the first certain information is used to determine a first duration, and the first duration is used to indicate a duration from when the first beam stops serving to when the second beam provides service.
  • the first beam and the second beam are beams of satellites.
  • the first information includes a first timer, and the first timer is used to indicate the first duration.
  • the first information includes a second timer and a third timer
  • the second timer is used to indicate the service duration of the first beam
  • the third timer is used to indicate the duration of one cycle of the first beam
  • the above method further includes: the terminal device determines the first duration according to the duration of the service provided by the first beam and the duration of one cycle of the first beam.
  • the above method further includes: the terminal device does not detect the scheduling information from the network device within the duration of the first duration.
  • the terminal device by sending the first information to the terminal device, the terminal device can determine the duration from the stop of the service of the first beam to the provision of service of the second beam according to the first information, so that the terminal device can Scheduling information is not detected internally, so that the power saving mode can be entered, which helps to reduce the complexity and power consumption of the terminal.
  • the network device is located on a satellite, and the above method further includes: the terminal device receives the global navigation satellite system GNSS positioning information and the ephemeris information of the second beam, and the ephemeris information of the second beam is used to indicate that the second beam is the terminal device Ephemeris information when providing services; terminal devices synchronize with network devices based on GNSS positioning information and ephemeris information.
  • the network device is located on the ground, and the above method further includes: the terminal device receives GNSS positioning information, ephemeris information of the second beam, and public timing advance information, and the ephemeris information of the second beam is used to indicate that the second beam The ephemeris information when the two beams provide services for the terminal equipment; the terminal equipment synchronizes with the network equipment according to the GNSS positioning information, ephemeris information and public timing advance information.
  • the foregoing method further includes: the terminal device receiving scheduling information corresponding to the second beam.
  • the first beam corresponds to the first bandwidth configuration
  • the second beam corresponds to the second bandwidth configuration
  • the first bandwidth configuration is the same as the second bandwidth configuration
  • the first beam corresponds to the first bandwidth configuration
  • the second beam corresponds to the second bandwidth configuration
  • the first bandwidth configuration is different from the second bandwidth configuration
  • the above method further includes: the terminal device acquires a first period, and the first period is used to indicate the period of the first duration; the terminal device uses the second beam to communicate with the network device according to the first duration, including: the terminal device communicates with the network device according to the first duration A duration and a first period use the second beam to communicate with the network device.
  • the terminal device enables the first duration to work for a period of time by acquiring the cycle information of the first duration, which reduces signaling overhead and improves configuration flexibility.
  • the above method further includes: the terminal device receives control information, and the terminal device activates the first timer according to the control information, or the terminal device activates the second timer and the third timer according to the control information.
  • the terminal device communicates with the network device by using the second beam according to the first duration.
  • the terminal device by sending the first information to the terminal device, the terminal device can determine the duration from the stop of the service of the first beam to the service of the second beam according to the first information, and use the second beam of the satellite to communicate with the network device , help to provide a wider range of communication services, reduce the complexity of terminal equipment, and improve user experience.
  • Fig. 5 shows a schematic diagram of a specific example of the satellite communication method of the present application.
  • the terminal device may receive a broadcast message, and the broadcast message may include uplink and downlink ephemeris information, public advance timing advance information, and data communication scheduling information.
  • the terminal device sends an uplink signal, in order to ensure that the terminal device is synchronized at the base station side, the terminal device needs to advance timing.
  • the terminal device needs to determine the round-trip transmission delay between the terminal device and the satellite according to the GNSS positioning information and ephemeris information, so as to complete the timing advance.
  • the terminal device when the network device is on the ground, the terminal device needs to determine the round-trip transmission delay between the terminal device and the satellite according to the GNSS positioning information and ephemeris information, and determine the distance between the satellite and the ground according to the public timing advance information carried in the broadcast message.
  • the round-trip transmission delay between stations is used to complete the timing advance.
  • the random access process may refer to the foregoing introduction or other existing technical solutions, and for the sake of brevity, details are not repeated here.
  • the terminal device communicates with the network device by using the first beam.
  • the first beam is a satellite beam, which may be a broadcast beam or a service beam.
  • the terminal device receives a first timer, where the first timer is used to indicate a time period from when the first beam stops serving to when the second beam provides service.
  • the period from when the first beam stops serving to when the second beam provides service may be referred to as the first period, and in this embodiment, the first period is determined by a first timer.
  • the second beam is a satellite beam, which may be a broadcast beam or a service beam.
  • the first beam and the second beam may be beams of the same satellite or beams of different satellites, which is not limited in this application.
  • the bandwidth configuration or polarization configuration corresponding to the first beam may be the same as or different from the bandwidth configuration or polarization configuration corresponding to the second beam, which is not limited in this application.
  • the timer may determine the duration, for example, the first timer may determine the first duration, and the first duration may indicate the duration from when the first beam stops serving to when the second beam provides service.
  • duration may be time units such as milliseconds, time slots, and symbols, which are not limited in this application.
  • the terminal device receives a first period, where the first period is used to indicate a period of the first timer.
  • the first period may be a predetermined period, or may be a period determined in other ways.
  • the terminal device may obtain the first period according to downlink signal detection, that is, the interval between two downlink signals detected is the first period.
  • the terminal device may directly obtain the first period according to a master system message (master information block, MIB).
  • MIB master system message
  • the terminal device may also obtain the first cycle according to the blind detection of the downlink signal (for example, MIB, primary synchronization signal (PSS), secondary synchronization signal (secondary synchronization signal, SSS), etc.), that is, the first Periods are indicated by scrambling.
  • the first period of the first beam may also correspond to the index of the first beam one-to-one, and each broadcast information block has its corresponding index, and the terminal can obtain its index by debroadcasting the signal and then determine it according to the index number its cycle.
  • index 1 corresponds to a period of 1 ms
  • index 2 corresponds to a period of 2 ms
  • index 3 corresponds to a period of 5 ms
  • 1 to 5 correspond to a period of 5 ms
  • 5 to 10 correspond to a period of 10 ms.
  • the above-mentioned first beam may be a broadcast beam or a service beam.
  • the terminal device enables the timer to work for a period of time by obtaining the period information of the timer, which reduces signaling overhead and improves configuration flexibility.
  • the terminal device receives scheduling information of the second beam.
  • the terminal device receives the scheduling information of the second beam so as to be able to complete random access.
  • the scheduling information of the second beam may be received when the terminal uses the first beam for communication, or may be received before the second beam arrives, which is not limited in this application
  • the terminal device when the network device is located on the satellite, the terminal device needs to receive the global navigation satellite system GNSS positioning information and the ephemeris information of the second beam, and the ephemeris information of the second beam is used to indicate the ephemeris information when the second beam provides services for the terminal device. ephemeris information; the terminal device synchronizes with the network device according to the GNSS positioning information and ephemeris information.
  • the terminal device When the network device is on the ground, the terminal device needs to receive GNSS positioning information, ephemeris information of the second beam and public timing advance information, and the ephemeris information of the second beam is used to instruct the second beam to provide services for the terminal device Time ephemeris information; terminal equipment synchronizes with network equipment according to GNSS positioning information, ephemeris information and public timing advance information.
  • the terminal device also needs to receive other types of beam information, which is not limited in this application.
  • the terminal device when the second beam cannot completely coincide with the first beam, the terminal device also needs to receive frequency information, center information, and distance information from the center to the edge of the beam, etc. of the second beam.
  • the terminal device when the second beam instructs the terminal device to switch cells, the terminal device also needs to receive information including cell information and measurement information.
  • the terminal device receives control information, where the control information is used to activate the first timer.
  • the first timer may be a configured fixed value.
  • multiple candidate values may be configured for the first timer, and one of the candidate values may be activated through control information.
  • control information may include cell-level, UE-level and beam-level messages and public information of certain users.
  • the specific signaling may be radio resource control (radio resource control, RRC), media access control (media access control, MAC) control signaling (control element, CE) may also be downlink control information (downlink control information, DCI), which is not limited in this application.
  • the terminal device may activate the first duration immediately (that is, take effect immediately), or activate the first duration after a certain period of time (that is, take effect after a delay), which is not limited in this application.
  • the terminal device does not detect scheduling information within the duration of the first duration.
  • the terminal device within the duration of the first duration, the terminal device is not covered by the broadcast beam or the service beam (that is, it is served by the beam), and the terminal device does not need to monitor any signal, so some power saving modes can be adopted, such as non- Continuous reception (discontinuous reception, DRX), etc.
  • some power saving modes can be adopted, such as non- Continuous reception (discontinuous reception, DRX), etc.
  • the terminal device by sending the first information to the terminal device, the terminal device can determine the duration from the stop of the service of the first beam to the provision of service of the second beam according to the first information, so that the terminal device can Scheduling information is not detected internally, so that the power saving mode can be entered, which helps to reduce the complexity and power consumption of the terminal.
  • the terminal device communicates with the network device by using the second beam according to the first duration.
  • the terminal device by sending the first information to the terminal device, the terminal device can determine the duration from the stop of the service of the first beam to the service of the second beam according to the first information, and use the second beam of the satellite to communicate with the network device , help to provide a wider range of communication services, reduce the complexity of terminal equipment, and improve user experience.
  • indicating in the embodiments of the present application may indicate explicitly and/or implicitly.
  • an implicit indication may be based on the location and/or resources used for transmission; an explicit indication may be based on one or more parameters, and/or one or more indices, and/or one or more bit pattern.
  • “indicate” may also mean “include”, for example, the first timer is used to indicate the duration from when the first beam stops serving to when the second beam provides service. , can also be expressed as: the first timer includes the time period from when the first beam stops serving to when the second beam provides service.
  • FIG. 6 shows an example of the same beam position or beam direction being served by beams of different frequency bands at different times in the present application.
  • one wave position or beam direction may need to be configured with one or more timers, and each beam has a corresponding Timer and corresponding bandwidth configuration. The start and end of the timer corresponding to the beam will trigger the corresponding bandwidth configuration.
  • the bandwidth configuration of the next beam may be sent in the previous beam, where the bandwidth configuration may also be referred to as a bandwidth resource.
  • multiple timers may be set to indicate service times of different beams.
  • the beams of two different frequency bands are independent.
  • the first timer may indicate the duration from when the first first frequency band beam stops serving to when the second first frequency band beam provides service, that is, when the first first frequency band beam stops serving, the first timer is triggered to start, and at the first timing Switch to the first frequency band beam of the next cycle at the end of the switch, that is, the second first frequency band beam.
  • the first beam may be the first beam of the first frequency band
  • the second beam may be the second beam of the first frequency band
  • the first beam and the second beam are beams of the same frequency band;
  • the second timer can indicate the duration from when the first second frequency band beam stops serving to when the second second frequency band beam provides service, that is, when the first second frequency band beam stops serving, it triggers the start of the second timer.
  • the second timer ends, switch to the second frequency band beam in the next period, that is, the second second frequency band beam.
  • the first beam of the second frequency band may be called the third beam
  • the second beam of the second frequency band may be called the fourth beam
  • the third beam and the fourth beam are beams of the same frequency band.
  • a timer may be set to indicate the service time of different beams. As shown in Fig. 7(b), two different frequency band beams share a timer.
  • the first timer may indicate the duration from when the first first frequency band beam stops serving to the first second frequency band beam provides service, that is, when the first first frequency band beam stops serving, the first timer is triggered to start, and at the first timing Switch to the second frequency band beam at the end of the cycle, that is, the first second frequency band beam, at this time the first beam can be the first first frequency band beam, and the second beam can be the first second frequency band beam , the first beam and the second beam are beams of different frequency bands.
  • the second timer can indicate the duration from when the first second frequency band beam stops serving to when the first first first frequency band beam provides service, that is, when the first second frequency band beam stops serving, the second timer is triggered.
  • the timer is started, and at the end of the second timer, the first frequency band beam of the next period is switched, that is, the second first frequency band beam.
  • the first beam in the second frequency band may continue to be called the second beam at this time, the second beam in the first frequency band becomes the third beam, and the second beam and the third beam are beams of different frequency bands.
  • the terminal device can determine the duration from the first beam stop serving to the second beam providing service according to the first information, and use the second beam of the satellite to communicate with the network device Communication can help provide a wider range of communication services, reduce the complexity of terminal equipment, and improve user experience.
  • FIG. 8 shows an example of the same beam position or beam direction being served by beams of different frequency bands at the same time in the present application.
  • one wave position or beam direction may need to be configured with one or more timers.
  • Each beam There are corresponding timers and corresponding bandwidth configurations. The start and end of the timer corresponding to the beam will trigger the corresponding bandwidth configuration.
  • the same beam position or beam direction is covered by different beams at the same time, and these beams correspond to different frequency bands, that is, different bandwidth configurations.
  • the bandwidth configuration of the next beam may be sent in the previous beam, where the bandwidth configuration may also be referred to as a bandwidth resource.
  • the terminal device can start the multi-connection transmission mode or carrier at this time Aggregation is used to achieve throughput enhancement or coverage enhancement; or, a part of terminal devices in the beam position or beam direction access the first frequency band beam, and another part of terminal devices access the second frequency band beam.
  • the broadcast beam scans the area, resources of two beams can be configured, and the terminal randomly selects a resource to access.
  • the terminal device may first access one of the beams, and then the beam allocates resources of the other beam.
  • different beams may be accessed in the beam position or beam direction according to the geographic location area where the terminal device is located.
  • the terminal device may also be instructed to access the corresponding beam in an implicit manner, for example, to access the corresponding beam according to parameters of random access including random access sequence and random access resource parameters.
  • a timer can be configured, which can be called the first timer, which is used to indicate that the first beam ends the service until How long the second beam will serve.
  • the terminal device may only use the first frequency band beam or the second frequency band beam, for example, the terminal device uses the first first frequency band beam in the first period, and uses the second first frequency band in the next period Beam, that is, at this time, the first timer is used to indicate the length of time from the end of the first first frequency band beam to the second first frequency band beam providing service; another example, the terminal device uses the first second frequency band in the first cycle Beam, use the second beam of the second frequency band in the next period, that is, at this time or the first timer is used to indicate the length of time from when the first beam of the second frequency band finishes serving to when the beam of the second second frequency band provides service.
  • the terminal device may alternately use the first frequency band beam and the second frequency band beam, for example, the terminal device uses the first frequency band beam in the first period, and uses the second frequency band beam in the next period, that is, At this time, the first timer is used to indicate the duration from the end of the service of the first first frequency band beam to the second second frequency band beam; for another example, the terminal device uses the second frequency band beam in the first period, and uses the second frequency band beam in the next period.
  • One frequency band beam that is, at this time, the first timer is used to indicate the duration from when the first second frequency band beam ends serving to when the second first frequency band beam provides service.
  • two timers can be configured, which can be called the first timer and the second timer.
  • the first timer and Each of the second timers may be used to indicate a time period from when the first beam ends serving to when the second beam provides service.
  • the terminal device may use the first beam of the first frequency band in the first period, and use the second beam of the first frequency band in the next period, that is, the first timer at this time is used to indicate that the first beam of the first frequency band ends the service
  • the length of time until the second beam of the first frequency band provides services the terminal device can use the first beam of the second frequency band in the first period, and use the second beam of the second frequency band in the next period, that is, at this time or the second timer Indicates the time period from when the first second frequency band beam stops serving to when the second second frequency band beam provides service.
  • the technical solution of the present application is introduced by taking multiple beams of one satellite to provide services for the terminal equipment as an example, but this should not be used as a limitation of the present application.
  • the technical solution of the present application is also applicable.
  • the first beam and the second beam may be beams of different satellites.
  • the ephemeris information of the first beam is used to indicate the ephemeris information when the first beam provides services for the terminal device, and the ephemeris information is also Including the relevant parameters of the satellite to which the first beam belongs.
  • the ephemeris information of the second beam is used to indicate the ephemeris information when the second beam provides services for the terminal device.
  • the ephemeris information also includes the ephemeris information to which the second beam belongs.
  • the relevant parameters of the satellite When the first beam and the second beam are beams of different satellites, during the communication of the first beam, it is necessary to send to the terminal device the relevant parameter information of the satellite corresponding to the second beam when the second beam is used for communication, and the second beam
  • the relevant parameter information of the corresponding satellite may include parameters related to synchronization and timing, and may also include resource configuration of the second beam.
  • the network device can issue one or more timers to maintain the communication of multiple beams under different satellites according to the different conditions of the first beam and the second beam. repeat.
  • Fig. 11 shows another schematic diagram of a specific example of the satellite communication method of the present application.
  • S1110 to S1130 are the same as S510 to S530 in FIG. 5 , and will not be repeated here.
  • the terminal device receives the second timer and the third timer, and determines the first duration.
  • the second timer and the third timer are carried in the first information
  • the second timer is used to indicate the service duration of the first beam
  • the third timer is used to indicate the duration of one cycle of the first beam.
  • the first duration is used to indicate the duration from when the first beam stops serving to when the second beam provides service.
  • a schematic diagram of the first beam and the second beam may be shown in FIG. 12
  • the second beam is the first beam after the first beam. That is, the duration of the third timer minus the duration of the second timer is the duration from when the first beam stops serving to when the second beam provides service, that is, the first duration.
  • the first beam and the second beam may be beams of the same frequency band, or may be beams of different frequency bands. Please refer to the above description for various situations, and details will not be repeated here.
  • S1140 may be after S1110 and before S1120.
  • S1140 may be after S1120, which is not limited in this application.
  • the terminal device receives a first period, where the first period is used to indicate a period of the first duration.
  • the first period may directly indicate the period of the first duration, and may also be used to indicate the periods of the second timer and the third timer, thus indirectly indicating the period of the first duration, which is not limited in this application.
  • the first cycle may be an agreed cycle, or a cycle determined by other means, such as implicit indication, index correspondence, etc.
  • implicit indication e.g., a cycle determined by other means, such as implicit indication, index correspondence, etc.
  • S1160 is the same as S560 in FIG. 5 , and will not be repeated here for brevity.
  • the scheduling information of the second beam may be received when the terminal uses the first beam for communication, or may be received before the arrival of the second beam, which is not limited in this application.
  • the terminal device receives control information, where the control information is used to activate the second timer and the third timer.
  • the second timer and the third timer may be a configured fixed value, such as 10ms.
  • multiple candidate values can be configured for the second timer and/or the third timer, and one of the candidate values can be activated through the control information value.
  • configure a set of candidate values (2ms, 4ms, 8ms, 16ms) for the second timer activate the candidate value 4ms through the control information, which means activating the second timer, and the duration of the second timer is 4ms .
  • the terminal device when the terminal device activates the second timer and the third timer according to the control information, it may activate the second timer and the third timer in the time slot when the control information is received (that is, activate immediately), or It is to activate the second timer and the third timer (that is, delay activation) for a period of time after receiving the control information, wherein the period of time can be several milliseconds, or several time slots, or other time units, This application does not limit.
  • the terminal device does not detect scheduling information within the duration of the first duration.
  • the terminal device within the duration of the first duration, the terminal device is not covered by the broadcast beam or service beam (that is, it is served by the beam), and the terminal device does not need to monitor any signal, so some power-saving modes can be used, such as DRX wait.
  • the terminal device by sending the first information to the terminal device, the terminal device can determine the duration from the stop of the service of the first beam to the provision of service of the second beam according to the first information, so that the terminal device can Scheduling information is not detected internally, so that the power saving mode can be entered, which helps to reduce the complexity and power consumption of the terminal.
  • S1190 is the same as S590 in FIG. 5 , and will not be repeated here.
  • the terminal device by sending the first information to the terminal device, the terminal device can determine the duration from the stop of the service of the first beam to the service of the second beam according to the first information, and use the second beam of the satellite to communicate with the network device , help to provide a wider range of communication services, reduce the complexity of terminal equipment, and improve user experience.
  • the duration when the duration is indicated by the timer, the duration can be counted from the moment the timer starts, but in practical applications, a more likely implementation is that the duration is 100 minutes after the timer starts.
  • a certain offset parameter starts timing.
  • the second timer is used to indicate the duration of the first beam providing services. This duration may be completely consistent with the duration of the second timer, or it may be different.
  • the service duration of the first beam will start counting.
  • the time unit may be a subframe, a time slot, or a symbol.
  • each device includes a corresponding hardware structure and/or software module for performing each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.
  • sequence numbers of the above processes do not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.
  • the method implemented by the communication device may also be implemented by a component (such as a chip or a circuit) that can be configured inside the communication device.
  • the satellite communication device provided by the embodiment of the present application will be described in detail with reference to FIG. 13 and FIG. 14 . It should be understood that the descriptions of the device embodiments correspond to the descriptions of the method embodiments. Therefore, for content that is not described in detail, reference may be made to the method embodiments above. For brevity, some content will not be repeated here.
  • the embodiment of the present application can divide the functional modules of the transmitting end device or the receiving end device according to the above method example, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module middle.
  • the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation. In the following, description will be made by taking the division of each functional module corresponding to each function as an example.
  • Fig. 13 is a schematic block diagram of an example of a satellite communication device 1300 provided in the present application. Any device involved in any of the methods 400, 500, and 1300 above, such as terminal devices and network devices, can be implemented by the satellite communication device shown in FIG. 13 .
  • the satellite communication device 1300 may be a physical device, may also be a component of the physical device (for example, an integrated circuit, a chip, etc.), and may also be a functional module in the physical device.
  • the satellite communication device 1300 includes: one or more processors 1310 .
  • the processor 1310 may call an interface to implement receiving and sending functions.
  • the interface may be a logical interface or a physical interface, which is not limited.
  • the interface may be a transceiver circuit, an input-output interface, or an interface circuit.
  • the transceiver circuits, input and output interfaces or interface circuits for realizing the functions of receiving and sending can be separated or integrated together.
  • the above-mentioned transceiver circuit or interface circuit can be used for reading and writing code/data, or the above-mentioned transceiver circuit or interface circuit can be used for signal transmission or transfer.
  • the interface can be implemented through a transceiver.
  • the satellite communication device 1300 may further include a transceiver 1330 .
  • the transceiver 1330 may also be called a transceiver unit, a transceiver, a transceiver circuit, etc., and is used to realize a transceiver function.
  • the satellite communication device 1300 may further include a memory 1320 .
  • the embodiment of the present application does not specifically limit the specific deployment location of the memory 1320, and the memory may be integrated in the processor or independent of the processor.
  • the satellite communication device 1300 does not include a memory, it is sufficient that the satellite communication device 1300 has a processing function, and the memory can be deployed in other locations (eg, a cloud system).
  • the processor 1310, the memory 1320 and the transceiver 1330 communicate with each other through internal connection paths, and transmit control and/or data signals.
  • the satellite communication device 1300 may also include other devices, such as an input device, an output device, a battery, and the like.
  • the memory 1320 may store execution instructions for executing the methods of the embodiments of the present application.
  • the processor 1310 can execute the instructions stored in the memory 1320 in conjunction with other hardware (such as the transceiver 1330 ) to complete the steps of the method shown below.
  • other hardware such as the transceiver 1330
  • the method disclosed in the embodiment of the present application may be applied to the processor 1310 or implemented by the processor 1310 .
  • the processor 1310 may be an integrated circuit chip with signal processing capabilities.
  • each step of the method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA) or other available Program logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in random access memory (random access memory, RAM), flash memory, read-only memory (read-only memory, ROM), programmable read-only memory or electrically erasable programmable memory, registers, etc. in the storage medium.
  • the storage medium is located in the memory, and the processor reads the instructions in the memory, and completes the steps of the above method in combination with its hardware.
  • memory 1320 can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory.
  • the non-volatile memory can be read-only memory ROM, programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically erasable programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory can be random access memory RAM, which acts as external cache memory.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM direct memory bus random access memory
  • direct rambus RAM direct rambus RAM
  • Fig. 14 is a schematic block diagram of a satellite communication device 1400 provided by the present application.
  • the satellite communication apparatus 1400 may be a general computer device or a chip in a general computer device, which is not limited in this embodiment of the present application.
  • the satellite communication device includes a processing unit 1410 and a transceiver unit 1420 .
  • the satellite communication device 1400 may be any device involved in the present application, and may realize functions that the device can realize. It should be understood that the satellite communication apparatus 1400 may be a physical device, may also be a component of the physical device (for example, an integrated circuit, a chip, etc.), and may also be a functional module in the physical device.
  • the satellite communication apparatus 1400 may be the terminal device in the above method embodiment, or a chip for realizing the functions of the terminal device in the above method embodiment.
  • the communication device is configured to perform the actions performed by the terminal device in FIG. 5 or FIG. 11 above.
  • the transceiver unit 1420 is configured to receive first information, the first information is used to determine a first duration, and the first duration is used to indicate the duration from when the first beam stops serving to when the second beam provides service, and the first beam and the second beam are satellites the beam; the processing unit 1410, configured to use the second beam to communicate with the network device according to the first duration.
  • the satellite communication apparatus 1400 may be the network device in the above method embodiment, or a chip for realizing the function of the network device in the above method embodiment.
  • the communication device is configured to perform the actions performed by the network device in FIG. 5 above.
  • the processing unit 1410 is configured to determine first information, the first information is used by the terminal device to determine the first duration, the first duration is used to indicate the duration from when the first beam stops serving to when the second beam provides service, the first beam and the second beam
  • the transceiver unit 1420 in the satellite communication device 1400 may be implemented through a communication interface (such as a transceiver or an input/output interface).
  • the processing unit 1410 in the satellite communication device 1400 may be implemented by at least one processor, for example, may correspond to the processor 1310 shown in FIG. 13 .
  • the satellite communication device 1400 may further include a storage unit, which may be used to store instructions or data, and the processing unit may call the instructions or data stored in the storage unit to implement corresponding operations.
  • a storage unit which may be used to store instructions or data
  • the processing unit may call the instructions or data stored in the storage unit to implement corresponding operations.
  • the satellite communication device 1400 is presented in the form of functional modules.
  • the "module” here may refer to an application-specific integrated circuit ASIC, a circuit, a processor and memory executing one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the above-mentioned functions.
  • device 1400 may take the form shown in FIG. 14 .
  • the processing unit 1410 may be implemented by the processor 1310 shown in FIG. 13 .
  • the processing unit 1410 may be implemented by the processor 1310 and the memory 1320 .
  • the transceiver unit 1420 may be implemented by the transceiver 1330 shown in FIG. 13 .
  • the transceiver 1330 includes a receiving function and a sending function.
  • the processor is implemented by executing computer programs stored in the memory.
  • the function and/or implementation process of the transceiver unit 1420 may also be implemented through pins or circuits.
  • the memory may be a storage unit in the chip, such as a register, a cache, etc., and the storage unit may also be a storage unit located outside the chip in the satellite communication device, such as the memory shown in FIG. 13 1320, or, may also be a storage unit deployed in other systems or devices, not in the computer device.
  • computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disk, floppy disk, or tape, etc.), optical disks (e.g., compact disc (compact disc, CD), digital versatile disc (digital versatile disc, DVD) etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), card, stick or key drive, etc.).
  • various storage media described herein can represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, but is not limited to, various other media capable of storing, containing and/or carrying instructions and/or data.
  • the present application also provides a computer program product, the computer program product including: a computer program or a set of instructions, when the computer program or a set of instructions is run on a computer, the computer is made to execute The method of any one of the embodiments shown in FIG. 4 to FIG. 12 .
  • the present application also provides a computer-readable storage medium, the computer-readable medium stores a program or a set of instructions, and when the program or a set of instructions is run on a computer, the computer Execute the method of any one of the embodiments shown in FIG. 4 to FIG. 12 .
  • the present application further provides a communication system, which includes the foregoing apparatus or device.
  • a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and the computing device can be components.
  • One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • a component may pass through a signal having one or more packets of data (for example, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet through a signal interacting with other systems) local and/or remote processes to communicate.
  • packets of data for example, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet through a signal interacting with other systems

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Abstract

本申请提供了一种卫星通信的方法和装置，包括：终端设备接收第一信息，第一信息用于确定第一时长，第一时长用于指示第一波束停止服务到第二波束提供服务的时长，第一波束和第二波束为卫星的波束；终端设备根据第一时长使用第二波束与网络设备进行通信。根据本申请的技术方案，通过向终端设备发送第一信息，使得终端设备可以根据第一信息确定第一波束停止服务到第二波束提供服务的时长，使用卫星的第二波束与网络设备进行通信，有助于提供更大范围的通信服务，并减少终端设备的复杂度，提升用户体验。

Description

卫星通信的方法和装置
本申请要求于2021年10月29日提交中国专利局、申请号为202111277428.7、申请名称为“卫星通信的方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及一种卫星通信的方法和装置。
背景技术
和地面通信相比，卫星通信有着独特的有点，例如，可以提供更广的覆盖范围、卫星基站不易受到自然灾害的外力破坏、为第五代(5th generation，5G)通信提供更多的数据传输资源、提供更加优质的通信服务，以及可以提升网络速率等。因此，同时支持地面与卫星的通信是未来5G通信的必然趋势，它在广覆盖、可靠性、多连接以及高吞吐方面都有比较大的益处。
目前，目前卫星通信目前已经在第三代合作伙伴计划(3 rd partnership project，3GPP)进行讨论作为5G通信的应用场景之一，但是目前的讨论和技术增强主要针对解决传输距离远的问题。未来卫星通信需要提供全球覆盖的通信服务，由于卫星的星上处理能力有限，能够同时提供的通信波束有限，无法同时为目标区域或者全球提供通信服务。
因此，亟需一种卫星通信的方法，能够提供更大范围的通信服务
发明内容
本申请提供一种卫星通信的方法和装置，有助于提供更大范围的通信服务，并减少终端设备的复杂度，提升用户体验。
第一方面，提供了一种卫星通信的方法，包括：终端设备接收第一信息，第一信息用于确定第一时长，第一时长用于指示第一波束停止服务到第二波束提供服务的时长，第一波束和第二波束为卫星的波束；终端设备根据第一时长使用第二波束与网络设备进行通信。
根据本申请的技术方案，通过向终端设备发送第一信息，使得终端设备可以根据第一信息确定第一波束停止服务到第二波束提供服务的时长，使用卫星的第二波束与网络设备进行通信，有助于提供更大范围的通信服务，并减少终端设备的复杂度，提升用户体验。
结合第一方面，在第一方面的某些实现方式中，所述第一信息包括第一定时器，所述第一定时器用于指示所述第一时长。
结合第一方面，在第一方面的另一些实现方式中，所述第一信息包括第二定时器和第三定时器，所述第二定时器用于指示所述第一波束提供服务的时长，所述第三定时器用于指示所述第一波束一个周期的时长，上述方法还包括：所述终端设备根据所述第一波束提 供服务的时长和所述第一波束一个周期的时长确定所述第一时长。
结合第一方面，在第一方面的某些实现方式中，上述方法还包括：终端设备在第一时长的持续时间内不检测来自网络设备的调度信息。
根据本申请的技术方案，通过向终端设备发送第一信息，终端设备可以根据第一信息确定第一波束停止服务到第二波束提供服务的时长，使得终端设备可以在该时长的持续时间内不检测调度信息，从而可以进入省功耗模式，有助于减少终端的复杂度以及功耗。
结合第一方面，在第一方面的某些实现方式中，网络设备位于卫星上，上述方法还包括：终端设备接收全球导航卫星系统GNSS定位信息和第二波束的星历信息，第二波束的星历信息用于指示第二波束为终端设备提供服务时的星历信息；终端设备根据GNSS定位信息和星历信息与网络设备同步。
结合第一方面，在第一方面的另一些实现方式中，网络设备位于地面上，上述方法还包括：终端设备接收全球导航卫星系统GNSS定位信息、第二波束的星历信息和公共定时提前信息，第二波束的星历信息用于指示第二波束为终端设备提供服务时的星历信息；终端设备根据GNSS定位信息、星历信息和公共定时提前信息与网络设备同步。
结合第一方面，在第一方面的某些实现方式中，上述方法还包括：终端设备接收第二波束对应的调度信息。
结合第一方面，在第一方面的某些实现方式中，第一波束对应第一带宽配置，第二波束对应第二带宽配置，第一带宽配置与第二带宽配置相同。
结合第一方面，在第一方面的某些实现方式中，第一波束对应第一带宽配置，第二波束对应第二带宽配置，第一带宽配置与第二带宽配置不同。
结合第一方面，在第一方面的某些实现方式中，上述方法还包括：终端设备获取第一周期，第一周期用于指示第一时长的周期；终端设备根据第一时长使用第二波束与网络设备进行通信，包括：终端设备根据第一时长和第一周期使用第二波束与网络设备进行通信。
根据本申请的技术方案，终端设备通过获取第一时长的周期信息，使得第一时长可以工作一段时间，减少了信令开销，提升了配置的灵活性。
结合第一方面，在第一方面的某些实现方式中，上述方法还包括：终端设备接收控制信息，终端设备根据控制信息激活第一定时器，或者终端设备根据控制信息激活第二定时器和第三定时器。
第二方面，提供了一种卫星通信的方法，包括：网络设备确定第一信息，第一信息用于终端设备确定第一时长，第一时长用于指示第一波束停止服务到第二波束提供服务的时长，第一波束和第二波束为卫星的波束；网络设备向终端设备发送第一信息。
根据本申请的技术方案，通过向终端设备发送第一信息，使得终端设备可以根据第一信息确定第一波束停止服务到第二波束提供服务的时长，使用卫星的第二波束与网络设备进行通信，有助于提供更大范围的通信服务，并减少终端设备的复杂度，提升用户体验。
结合第二方面，在第二方面的某些实现方式中，所述第一信息包括第一定时器，所述第一定时器用于指示所述第一时长。
结合第二方面，在第二方面的另一些实现方式中，所述第一信息包括第二定时器和第三定时器，所述第二定时器用于指示所述第一波束提供服务的时长，所述第三定时器用于指示所述第一波束一个周期的时长。
结合第二方面，在第二方面的某些实现方式中，上述方法还包括：网络设备在第一时长的持续时间内不向终端设备发送调度信息。
根据本申请的技术方案，通过向终端设备发送第一信息，终端设备可以根据第一信息确定第一波束停止服务到第二波束提供服务的时长，使得终端设备可以在定时器的持续时间内不检测调度信息，从而可以进入省功耗模式，有助于减少终端的复杂度以及功耗。
结合第二方面，在第二方面的某些实现方式中，网络设备位于卫星上，上述方法还包括：网络设备发送全球导航卫星系统GNSS定位信息和第二波束的星历信息，第二波束的星历信息用于指示第二波束为终端设备提供服务时的星历信息，GNSS定位信息和星历信息用于终端设备与网络设备同步。
结合第二方面，在第二方面的另一些实现方式中，网络设备位于地面上，上述方法还包括：网络设备发送全球导航卫星系统GNSS定位信息、第二波束的星历信息和公共定时提前信息，第二波束的星历信息用于指示第二波束为终端设备提供服务时的星历信息，GNSS定位信息、星历信息和公共定时提前信息用于终端设备与网络设备同步。
结合第二方面，在第二方面的某些实现方式中，上述方法还包括：终端设备接收第二波束对应的调度信息。
结合第二方面，在第二方面的某些实现方式中，第一波束对应第一带宽配置，第二波束对应第二带宽配置，第一带宽配置与第二带宽配置相同。
结合第二方面，在第二方面的某些实现方式中，第一波束对应第一带宽配置，第二波束对应第二带宽配置，第一带宽配置与第二带宽配置不同。
结合第二方面，在第二方面的某些实现方式中，上述方法还包括：网络设备发送第一周期，第一周期用于指示第一时长的周期。
结合第二方面，在第二方面的某些实现方式中，上述方法还包括：网络设备发送控制信息，控制信息用于激活第一定时器，或者，控制信息用于激活第二定时器和第三定时器。
第三方面，提供了一种卫星通信的装置，包括：收发单元，用于接收第一信息，第一信息用于确定第一时长，第一时长用于指示第一波束停止服务到第二波束提供服务的时长，第一波束和第二波束为卫星的波束；处理单元，用于根据第一时长使用第二波束与网络设备进行通信。
结合第三方面，在第三方面的某些实现方式中，所述第一信息包括第一定时器，所述第一定时器用于指示所述第一时长。
结合第三方面，在第三方面的某些实现方式中，所述第一信息包括第二定时器和第三定时器，所述第二定时器用于指示所述第一波束提供服务的时长，所述第三定时器用于指示所述第一波束一个周期的时长，所述处理单元，具体用于根据所述第一波束提供服务的时长和所述第一波束一个周期的时长确定所述第一时长。
结合第三方面，在第三方面的某些实现方式中，处理单元，还用于在第一时长的持续时间内不检测来自网络设备的调度信息。
结合第三方面，在第三方面的某些实现方式中，网络设备位于卫星上，收发单元，还用于接收全球导航卫星系统GNSS定位信息和第二波束的星历信息，第二波束的星历信息用于指示第二波束为终端设备提供服务时的星历信息；处理单元，还用于终端设备根据GNSS定位信息和星历信息与网络设备同步。
结合第三方面，在第三方面的另一些实现方式中，网络设备位于地面上，收发单元，还用于接收全球导航卫星系统GNSS定位信息、第二波束的星历信息和公共定时提前信息，第二波束的星历信息用于指示第二波束为终端设备提供服务时的星历信息；处理单元，还用于根据GNSS定位信息、星历信息和公共定时提前信息与网络设备同步。
结合第三方面，在第三方面的某些实现方式中，收发单元，还用于接收第二波束对应的调度信息。
结合第三方面，在第三方面的某些实现方式中，第一波束对应第一带宽配置，第二波束对应第二带宽配置，第一带宽配置与第二带宽配置相同。
结合第三方面，在第三方面的某些实现方式中，第一波束对应第一带宽配置，第二波束对应第二带宽配置，第一带宽配置与第二带宽配置不同。
结合第三方面，在第三方面的某些实现方式中，收发单元，还用于获取第一周期，第一周期用于指示第一时长的周期；处理单元，具体用于终端设备根据第一时长和第一周期使用第二波束与网络设备进行通信。
结合第三方面，在第三方面的某些实现方式中，收发单元，还用于接收控制信息，处理单元，还用于根据控制信息激活第一定时器，或者，处理单元，还用于根据控制信息激活第二定时器和第三定时器。
第四方面，提供了一种卫星通信的装置，包括：处理单元，用于确定第一信息，第一信息用于终端设备确定第一时长，第一时长用于指示第一波束停止服务到第二波束提供服务的时长，第一波束和第二波束为卫星的波束；收发单元，用于向终端设备发送第一信息。
结合第四方面，在第四方面的某些实现方式中，所述第一信息包括第一定时器，所述第一定时器用于指示所述第一时长。
结合第四方面，在第四方面的另一些实现方式中，所述第一信息包括第二定时器和第三定时器，所述第二定时器用于指示所述第一波束提供服务的时长，所述第三定时器用于指示所述第一波束一个周期的时长。
结合第四方面，在第四方面的某些实现方式中，收发单元，还用于在第一时长的持续时间内不向终端设备发送调度信息。
结合第四方面，在第四方面的某些实现方式中，网络设备位于卫星上，收发单元，还用于发送全球导航卫星系统GNSS定位信息和第二波束的星历信息，第二波束的星历信息用于指示第二波束为终端设备提供服务时的星历信息，GNSS定位信息和星历信息用于终端设备与网络设备同步。
结合第四方面，在第四方面的另一些实现方式中，网络设备位于地面上，收发单元，还用于发送全球导航卫星系统GNSS定位信息、第二波束的星历信息和公共定时提前信息，第二波束的星历信息用于指示第二波束为终端设备提供服务时的星历信息，GNSS定位信息、星历信息和公共定时提前信息用于终端设备与网络设备同步。
结合第四方面，在第四方面的某些实现方式中，收发单元，还用于接收第二波束对应的调度信息。
结合第四方面，在第四方面的某些实现方式中，第一波束对应第一带宽配置，第二波束对应第二带宽配置，第一带宽配置与第二带宽配置相同。
结合第四方面，在第四方面的某些实现方式中，第一波束对应第一带宽配置，第二波 束对应第二带宽配置，第一带宽配置与第二带宽配置不同。
结合第四方面，在第四方面的某些实现方式中，收发单元，还用于发送第一周期，第一周期用于指示第一时长的周期。
结合第四方面，在第四方面的某些实现方式中，收发单元，还用于网络设备发送控制信息，控制信息用于激活第一定时器，或者控制信息用于激活第二定时器和第三定时器。
第五方面，提供了一种通信装置，包括：处理器，该处理器与存储器耦合，存储器用于存储程序或指令，当程序或指令被处理器执行时，使得装置实现如第一方面或第二方面中的任一方面及其各种实现方式中的方法。
可选地，上述处理器为一个或多个，上述存储器为一个或多个。
可选地，上述存储器可以与上述处理器集成在一起，或者上述存储器与处理器分离设置。
第六方面，提供一种通信系统，包括终端设备和网络设备。
其中，终端设备用于实现上述第一方面中的各实现方式的方法，网络设备用于实现上述第二方面中各实现方式中的方法。
在一种可能的设计中，该通信系统还包括本申请实施例提供的方案中与通信设备进行交互的其他设备。
第七方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述各方面中的方法。
需要说明的是，上述计算机程序代码可以全部或者部分存储在第一存储介质上，其中第一存储介质可以与处理器封装在一起的，也可以与处理器单独封装，本申请实施例对此不作具体限定。
第八方面，提供了一种计算机可读介质，所述计算机可读介质存储有程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述各方面中的方法。
第九方面，提供了一种芯片系统，包括存储器和处理器，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得安装有该芯片系统的通信设备执行上述第一方面至第五方面中的任意方面及其可能实现方式中的方法。
其中，该芯片系统可以包括用于发送信息或数据的输入芯片或者接口，以及用于接收信息或数据的输出芯片或者接口。
附图说明
图1是本申请实施例的多波束卫星通信系统的示意图。
图2是本申请实施例的卫星网络的一例应用场景。
图3是本申请实施例的一颗卫星提供多个波束的示意图。
图4是本申请卫星通信方法的一例示意图。
图5是本申请卫星通信方法的具体示例的一例示意图。
图6是本申请同一波位或波束方向在不同时刻被不同频段的波束服务的一例示意图。
图7是本申请定时器的配置方式的一例示意图。
图8是本申请同一波位或波束方向在同一时刻被不同频段的波束服务的一例示意图。
图9是本申请定时器的配置方式的另一例示意图。
图10是本申请多颗卫星的多个波束协同服务的一例示意图。
图11是本申请卫星通信方法的具体示例的另一例示意图。
图12是本申请定时器的配置方式的又一例示意图。
图13是本申请卫星通信设备的一例示意性结构图。
图14是本申请卫星通信装置的一例示意性结构图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请的技术方案可以应用于卫星通信系统、高空平台(high altitude platform station，HAPS)通信、空对地(air-to-ground，A2G)通信和无人驾驶飞行器(Unmanned Aerial Vehicle，UAV)等非地面网络(non-terrestrial network，NTN)系统。例如，通信导航一体化(integrated communication and navigation，ICaN)系统、全球导航卫星系统(global navigation satellite system，GNSS)等。
卫星通信系统可以与传统的移动通信系统相融合。例如：所述移动通信系统可以为第四代(4th generation，4G)通信系统(例如，长期演进(long term evolution，LTE)系统)，全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统，第五代(5th generation，5G)通信系统(例如，新无线(new radio，NR)系统)，以及未来的移动通信系统等。
图1示出了本申请实施例的多波束卫星通信系统的示意图。
如图1所示，卫星的波束分为业务波束和广播波束，在不考虑星上处理复杂度的理想情况下，可以假定卫星能够同时提供比较多的波束，且业务波束能够覆盖所有的目标服务区域。另外广播波束承载了一些小区级别的系统消息用于终端设备做随机接入，终端设备初始接入可以在广播波束中完成。广播波束可以作为一个宽波束，覆盖一个小区内所有的业务波束，也可以作为一个窄波束，按照周期扫描的方式依次在不同时间覆盖不同的数据波束。为了避免波束间的干扰，相邻业务波束，业务波束和广播波束，可以采用不同的频段，一般称为部分带宽(bandwidth part，BWP)。
但在实际的应用场景，由于卫星上可以提供的能量有限，当广播波束为宽波束时，能量无法集中，会导致终端设备接收到信号较弱，最终导致广播信号的解码失败。而对于业务波束，卫星所能提供的波束数量也是有限的，由于卫星覆盖面积大，可能提供的业务波束无法同时覆盖所有的面积。
现有标准讨论的卫星通信系统，其业务波束暂不支持跳波束的技术，在卫星上处理能力有限的情况下，无法提供更大范围的通信服务，最终无法实现全球覆盖。
基于此，本申请针对卫星通信场景，将目标区域划分成多个波位或波束方向，通过跳波束的方式，即不同时刻卫星上的波束为不同波位或波束方向上的终端设备提供通信服务，不仅能够实现目标区域的全部覆盖，还有助于减少终端设备的复杂度，提升用户体验。
为便于理解本申请实施例，下面首先对本实施例涉及的概念进行说明。
1、卫星通信
卫星通信系统由卫星端、地面端、用户端三部分组成。以前的卫星通信系统中卫星端在空中起中继站的作用，即把地面站发上来的电磁波放大后再返送回另一地面站。卫星星 体又包括两大子系统：星载设备和卫星母体。地面站则是卫星系统与地面公众网的接口，地面用户也可以通过地面站出入卫星系统形成链路，地面站还包括地面卫星控制中心，及其跟踪、遥测和指令站。用户端即是各种用户终端设备。
卫星通信的应用领域不断扩大，除金融、证券、邮电、气象、地震等部门外，远程教育、远程医疗、应急救灾、应急通信、应急电视广播、海陆空导航、连接互联网的网络电话、电视等将会广泛应用。
为了实现更灵活的组网，卫星通信有采用蜂窝技术的趋势，例如，把基站(base station，BS)搬到卫星上去。
2、波束成形
为了降低无线电波的传播损失并且增加传输距离，在5G系统中讨论了波束成形、大规模多输入多输出(multiple-input multiple-output，MIMO)、全维度MIMO(full-dimension MIMO，FD-MIMO)、阵列天线、数字波束成形(digital beamforming)、模拟波束形成(analog beamforming)等天线技术。
5G系统中的网络设备(例如，gNB或TRP)可以通过波束成形技术与用户设备进行交互。网络设备通常可以形成多个下行链路(down link，DL)传输波束(transmit beam，Tx beam)，在某一个或者多个DL Tx beam上向该波束覆盖范围内的终端设备发送下行信号。终端设备可以通过接收波束(receive beam，Rx beam)或者全向天线进行接收，以获得较大的阵列增益。通过波束成形技术，网络设备与用户设备间实现了更高的数据传输速率。
3、同步
在卫星通信中，终端设备需要首先实现与网络设备的时间的同步，在同步的情况下，根据事先约定的协议，网络设备和终端设备就可以解析出包含在信号内的具体内容了。终端设备首先需要侦测的是主同步信号。以NR为例，在同步过程中，首先网络设备先向发送同步信号块(synchronization signal Block，SSB)波束，终端设备用宽波束扫描，UE和BS都扫描一遍后，确认网络设备的窄波束范围和终端设备的宽波束。例如，在NR系统里，SSB的重复周期可以为5ms，每个周期包含一个SSB。因此，终端设备可以通过捕获主同步信号(primary synchronization signal，PSS)，以得到小区的5ms定时。
4、随机接入(random access，RA)
在LTE或5G有接入控制的通信系统中，用于未接入网络的设备与网络建立连接的信息交互机制(或者过程)。由于随机接入过程由随机接入信道(random access channel，RACH)承载，协议和口语中也常将RA和RACH混用。分为基于竞争的随机接入和非竞争的随机接入。基于竞争的随机接入通常分为4步，每一步对应一个消息：包括消息1、消息2、消息3、消息4，分别承载不同的信令或者信息。基于非竞争的随机接入只有前2步。另外，为了降低4步基于竞争的随机接入的接入时间，进一步有2步随机接入。在2步随机接入中，由消息A和消息B两个组成，其中消息A中包括前导和第一个数据信息(例如类似4步随机接入中的消息1和消息3)，消息B中包括竞争解决以及上行调度(例如类似4步随机接入中的消息2和消息4)。
应理解，前述对卫星通信、波束成形、下行同步、随机接入等的相关介绍只是为了便于理解本申请的技术方案，而不对本申请构成任何限定。
图2示出了本申请实施例的卫星网络的一例应用场景。其中，地面移动终端通过空口(该空口可以是各种类型的空口，例如，5G空口)接入网络。接入网设备可以部署在卫星上，或者部署在地面，并通过无线链路与地面的核心网相连。同时，在卫星之间存在无线链路，完成接入网设备之间的信令交互和用户数据传输。图2中的各个网元以及他们的接口说明如下：
终端设备：包括支持新空口的移动设备，可以通过空口接入卫星网络并发起呼叫，上网等业务。
接入网设备：主要是提供无线接入服务，调度无线资源给接入终端，提供可靠的无线传输协议和数据加密协议等。
核心网：用户接入控制，移动性管理，会话管理，用户安全认证，计费等业务。它有多个功能单元组成，可以分为控制面和数据面的功能实体。接入与移动管理功能(access and mobility management function，AMF)，负责用户接入管理，安全认证，还有移动性管理。用户面功能(user plane function，UPF)负责管理用户面数据的传输，流量统计等功能。
地面站：负责转发卫星基站和核心网之间的信令和业务数据。
空口：终端和基站之间的无线链路。
Xn接口：基站和基站之间的接口，主要用于切换等信令交互。
NG接：基站和核心网之间接口，主要交互核心网的非接入层(non-access-stratum，NAS)等信令，以及用户的业务数据。
本申请应用于5G等通信系统，涉及UE和基站，地面站等无线接入网元，基于无线通信协议执行上下行数据通信。
在本申请实施例中，接入网设备不限于卫星基站，所述接入网设备还可以部署于高空平台、卫星或者地面等。
所述接入网设备可以是LTE中的演进型基站(evolutional Node B，eNB或eNodeB)；或者5G网络或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的基站，宽带网络业务网关(broadband network gateway，BNG)，汇聚交换机或非第三代合作伙伴项目(3rd generation partnership project，3GPP)接入设备等，本申请实施例对此不作具体限定。
可选的，本申请实施例中的接入网设备可以包括各种形式的基站，例如：宏基站、微基站(也称为小站)、中继站、接入点、下一代基站(gNodeB，gNB)、基带单元(baseBand unit，BBU)、传输点(transmitting and receiving point，TRP)、发射点(transmitting point，TP)、移动交换中心等，本申请实施例对此不作具体限定。本申请实施例中提及的卫星，也可以为卫星基站，或者为搭载在卫星上的网络侧设备。
本申请实施例中提及的终端设备，包括各种具有无限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。
图3是本申请实施例的一颗卫星提供多个波束的示意图。
如图3所示，一颗卫星可以提供多个波束，包括至少一个广播波束和多个业务波束。一种可能的场景为广播波束和业务波束的大小不同，多个业务波束以相邻的方式一起进行跳波束，广播波束覆盖了所有的业务波束，两种类型的波束采用周期性或者非周期性的方式在不同的波位或波束方向上进行跳变，例如t＝0时刻与t＝1时刻时波束分别在不同的波位或波束方向上。
另一种可能的场景为广播波束和业务波束的大小相同，换句话说，在该场景下，广播波束的数量与业务波束数量相同，并且广播波束和业务波束按照同样的方式进行跳波束，其中，多个广播波束或者多个业务波束不一定向相邻，可以根据实际的业务情况进行周期或者非周期的跳波束。
下面介绍本申请的技术方案。
图4示出了本申请卫星通信方法的一例示意图。
S410，终端设备接收第一信息，第一定信息用于确定第一时长，第一时长用于指示第一波束停止服务到第二波束提供服务的时长。
其中，第一波束和第二波束为卫星的波束。
作为一种可能的实现方式，第一信息包括第一定时器，第一定时器用于指示所述第一时长。
作为另一种可能的实现方式，第一信息包括第二定时器和第三定时器，第二定时器用于指示第一波束提供服务的时长，第三定时器用于指示第一波束一个周期的时长，上述方法还包括：终端设备根据第一波束提供服务的时长和第一波束一个周期的时长确定第一时长。
可选地，上述方法还包括：终端设备在第一时长的持续时间内不检测来自网络设备的调度信息。
这样，根据本申请的技术方案，通过向终端设备发送第一信息，终端设备可以根据第一信息确定第一波束停止服务到第二波束提供服务的时长，使得终端设备可以在该时长的持续时间内不检测调度信息，从而可以进入省功耗模式，有助于减少终端的复杂度以及功耗。
可选地，网络设备位于卫星上，上述方法还包括：终端设备接收全球导航卫星系统GNSS定位信息和第二波束的星历信息，第二波束的星历信息用于指示第二波束为终端设备提供服务时的星历信息；终端设备根据GNSS定位信息和星历信息与网络设备同步。
可选地，网络设备位于地面上，上述方法还包括：终端设备接收全球导航卫星系统GNSS定位信息、第二波束的星历信息和公共定时提前信息，第二波束的星历信息用于指 示第二波束为终端设备提供服务时的星历信息；终端设备根据GNSS定位信息、星历信息和公共定时提前信息与网络设备同步。
可选地，上述方法还包括：终端设备接收第二波束对应的调度信息。
可选地，第一波束对应第一带宽配置，第二波束对应第二带宽配置，第一带宽配置与第二带宽配置相同。
可选地，第一波束对应第一带宽配置，第二波束对应第二带宽配置，第一带宽配置与第二带宽配置不同。
可选地，上述方法还包括：终端设备获取第一周期，第一周期用于指示第一时长的周期；终端设备根据第一时长使用第二波束与网络设备进行通信，包括：终端设备根据第一时长和第一周期使用第二波束与网络设备进行通信。
这样，根据本申请的技术方案，终端设备通过获取第一时长的周期信息，使得第一时长可以工作一段时间，减少了信令开销，提升了配置的灵活性。
可选地，上述方法还包括：终端设备接收控制信息，终端设备根据控制信息激活第一定时器，或者，终端设备根据控制信息激活第二定时器和第三定时器。
S420，终端设备根据第一时长使用第二波束与网络设备进行通信。
其中，该通信过程可参照现有技术，在此不再赘述。
根据本申请的技术方案，通过向终端设备发送第一信息，使得终端设备可以根据第一信息确定第一波束停止服务到第二波束提供服务的时长，使用卫星的第二波束与网络设备进行通信，有助于提供更大范围的通信服务，并减少终端设备的复杂度，提升用户体验。
图5示出了本申请卫星通信方法的具体示例的一例示意图。
S510，终端设备与网络设备下行同步。
具体地，终端设备可以接收广播消息，该广播消息可以包括上下行的星历信息，公共提前定时提前信息以及数据通信的调度信息等。当终端设备发送上行信号时，为保证终端设备在基站侧同步，终端设备需要做定时提前。例如，当网络设备在卫星上时，终端设备需要根据GNSS定位信息和星历信息确定终端设备与卫星之间的往返传输时延，来完成定时提前。又例如，当网络设备在地面上时，终端设备需要根据GNSS定位信息和星历信息确定终端设备与卫星之间的往返传输时延，并根据广播消息中携带的公共定时提前信息确定卫星与地面站之间的往返传输时延，来完成定时提前。
S520，终端设备完成随机接入。
其中，该随机接入过程可参照前文介绍或其他现有的技术方案，为了简洁，在此不再赘述。
S530，终端设备使用第一波束与网络设备进行通信。
其中，第一波束为卫星的波束，其可以是广播波束或业务波束。
S540，终端设备接收第一定时器，第一定时器用于指示第一波束停止服务到第二波束提供服务的时长。
其中，为便于描述，可以将第一波束停止服务到第二波束提供服务的时长称为第一时长，在本实施例中，该第一时长通过第一定时器确定。
其中，第二波束为卫星的波束，其可以是广播波束或业务波束。
可选地，第一波束和第二波束可以是同一颗卫星的波束，也可以是不同卫星的波束， 本申请不对其进行限定。
可选地，第一波束对应的带宽配置或极化配置可以与第二波束对应的带宽配置或极化配置相同，也可以不同，本申请不对其进行限定。
在本申请实施例中，定时器可以确定时长，例如，第一定时器可以确定第一时长，第一时长可以表示第一波束停止服务到第二波束提供服务的时长。
应理解，上述时长可以是毫秒、时隙、符号等时间单位，本申请不对其进行限定。
还应理解，无论表述为时长还是定时器，均不会对本申请的技术方案产生额外的影响，本申请为方便描述，统一称为定时器，但其不应作为限定，本领域技术人员可以在本申请的基础上采用时长、计时器、计时标识等方法来表征定时器，均应属于本申请的保护范围。
S550，终端设备接收第一周期，第一周期用于指示第一定时器的周期。
具体地，当该第一波束采用周期性的方式进行跳波束时，该第一周期可以约定好的周期，也可以是通过其他方式确定的周期。例如，终端设备可以根据下行信号检测获得该第一周期，即检测到两个下行信号的间隔为该第一周期。又例如，终端设备可以根据主系统消息(master information block，MIB)直接得到第一周期。再例如，终端设备还可以根据下行信号(例如，MIB、主同步信号(primary synchronization signal，PSS)、辅同步信号(secondary synchronization signal，SSS)等)的盲检来获得第一周期，即第一周期以加扰的方式进行指示。
可选地，第一波束的第一周期还可以与第一波束的索引一一对应，每个每个广播信息块有其对应的索引，终端通过解广播信号可以获得其索引再根据索引号确定其周期。例如索引1对应1ms周期，索引2对应2ms周期，索引3对应5ms周期等，或者1～5对应周期5ms，5～10对应周期10ms。
其中，上述第一波束可以为广播波束或业务波束。
这样，根据本申请的技术方案，终端设备通过获取定时器的周期信息，使得定时器可以工作一段时间，减少了信令开销，提升了配置的灵活性。
S560，终端设备接收第二波束的调度信息。
终端设备接收第二波束的调度信息，以便于能够完成随机接入，其过程请参照前文介绍或其他现有技术，为了简洁，在此不再赘述。其中，第二波束的调度信息可以在终端使用第一波束通信时接收，也可以是第二波束来之前再进行接收，本申请对其不进行限定
其中，当网络设备位于卫星上，终端设备需要接收全球导航卫星系统GNSS定位信息和第二波束的星历信息，第二波束的星历信息用于指示第二波束为终端设备提供服务时的星历信息；终端设备根据GNSS定位信息和星历信息与网络设备同步。
当网络设备位于地面上，终端设备需要接收全球导航卫星系统GNSS定位信息、第二波束的星历信息和公共定时提前信息，第二波束的星历信息用于指示第二波束为终端设备提供服务时的星历信息；终端设备根据GNSS定位信息、星历信息和公共定时提前信息与网络设备同步。
可选地，终端设备还需要接收其他类型的波束信息，本申请不对其进行限定。例如，当第二波束不能与第一波束完全重合，终端设备还需要接收第二波束的频率信息、中心信息以及中心到波束边缘距离的信息等。又例如，当第二波束指示终端设备小区切换时，终端设备还需要接收包括小区信息以及测量信息在内信息。
S570，终端设备接收控制信息，控制信息用于激活第一定时器。
在本申请的实施例中，第一定时器可以为配置的固定的值。但作为另一种可能的实现方式，在实际使用中，为提高配置的灵活性，可以为第一定时器配置多个候选值，并通过控制信息激活其中某个候选值。
其中，上述控制信息可以包括小区级别、UE级别和波束级别消息以及某些用户的公共信息，具体的信令可以是无线资源控制(radio resource control，RRC)，媒体接入控制(media access control，MAC)控制信令(control element，CE)还可以是下行控制信息(downlink control information，DCI)，本申请不对其进行限定。
其中，终端设备接收到该控制信息，可以立即激活第一时长(即，立即生效)，也可以在一定时间后激活第一时长(即，延时生效)，本申请不对其进行限定。
S580，终端设备在第一时长的持续时间内不检测调度信息。
具体地，在第一时长的持续时间内，终端设备没有被广播波束或业务波束所覆盖(即被波束提供服务)，终端设备无需监听任何信号，因此可以采用一些省功耗的模式，例如非连续接收(discontinuous reception，DRX)等。
这样，根据本申请的技术方案，通过向终端设备发送第一信息，终端设备可以根据第一信息确定第一波束停止服务到第二波束提供服务的时长，使得终端设备可以在该时长的持续时间内不检测调度信息，从而可以进入省功耗模式，有助于减少终端的复杂度以及功耗。
S590，终端设备根据第一时长使用第二波束与网络设备进行通信。
其中，该通信过程可参照现有技术，在此不再赘述。
根据本申请的技术方案，通过向终端设备发送第一信息，使得终端设备可以根据第一信息确定第一波束停止服务到第二波束提供服务的时长，使用卫星的第二波束与网络设备进行通信，有助于提供更大范围的通信服务，并减少终端设备的复杂度，提升用户体验。
应理解，在本申请实施例中“指示”可以显式地和/或隐式地指示。示例性地，隐式指示可以基于用于传输的位置和/或资源；显式指示可以基于一个或多个参数，和/或一个或多个索引，和/或一个或多个它所表示的位模式。此外，“指示”还可以表示“包含”，例如，第一定时器用于指示第一波束停止服务到第二波束提供服务的时长。，也可以表述为：第一定时器包含第一波束停止服务到第二波束提供服务的时长。
图6示出了本申请同一波位或波束方向在不同时刻被不同频段的波束服务的一例示意图。
本申请的技术方案可以适用于同一波位在不同时刻被不同频段的波束服务的场景，在该场景下，一个波位或波束方向可能需要配置一个或多个定时器，每个波束有对应的定时器以及对应的带宽配置。波束对应的定时器的启动和结束，会触发对应的带宽配置。
如图6所示，同一波位或波束方向在t＝0时刻和t＝1时刻被不同的波束覆盖，这些波束对应的频段不一样，也就是带宽配置不同。在上一个波束可以发送下一个波束的带宽配置，其中，带宽配置也可以称为带宽的资源。
一种可能的实现方式中，可以设置多个定时器来指示不同波束的服务时间。如图7(a)所示，两个不同频段波束各自独立。第一定时器可以表示第一个第一频段波束停止服务到第二个第一频段波束提供服务的时长，即第一个第一频段波束停止服务时触发第一定时器 启动，在第一定时器结束时切换到下一个周期的第一频段波束，即，第二个第一频段波束。此时，第一波束可以是第一个第一频段波束，第二波束可以是第二个第一频段波束，第一波束和第二波束为同一频段的波束；
同理，第二定时器可以表示第一个第二频段波束停止服务到第二个第二频段波束提供服务的时长，即第一个第二频段波束停止服务时触发第二定时器启动，在第二定时器结束时切换到下一个周期的第二频段波束，即，第二个第二频段波束。为便于区分，此时可以将第一个第二频段波束成为第三波束，第二个第二频段波束成为第四波束，第三波束和第四波束为同一频段的波束。
在另一种可能的实现方式中，可以设置一个定时器来指示不同波束的服务时间。如图7(b)所示，两个不同频段波束共享一个定时器。第一定时器可以表示第一个第一频段波束停止服务到第一个第二频段波束提供服务的时长，即第一个第一频段波束停止服务时触发第一定时器启动，在第一定时器结束时切换到该周期的第二频段波束，即，第一个第二频段波束，此时第一波束可以是第一个第一频段波束，第二波束可以是第一个第二频段波束，第一波束和第二波束为不同频段的波束。
同理，在下一个周期中，第二定时器可以表示第一个第二频段波束停止服务到第一个第一频段波束提供服务的时长，即第一个第二频段波束停止服务时触发第二定时器启动，在第二定时器结束时切换到下一个周期的第一频段波束，即，第二个第一频段波束。为便于区分，此时可以将第一个第二频段波束继续称为第二波束，第二个第一频段波束成为第三波束，第二波束和第三波束为不同频段的波束。
这样，根据本申请的技术方案，通过向终端设备发送第一信息，使得终端设备可以根据第一信息确定第一波束停止服务到第二波束提供服务的时长，使用卫星的第二波束与网络设备进行通信，有助于提供更大范围的通信服务，并减少终端设备的复杂度，提升用户体验。
图8示出了本申请同一波位或波束方向在同一时刻被不同频段的波束服务的一例示意图。
本申请的技术方案可以适用于同一波位或波束方向在同一时刻被不同频段的波束服务的场景，在该场景下，一个波位或波束方向可能需要配置一个或多个定时器，每个波束有对应的定时器以及对应的带宽配置。波束对应的定时器的启动和结束，会触发对应的带宽配置。
如图8所示，同一波位或波束方向同一时刻被不同的波束覆盖，这些波束对应的频段不一样，也就是带宽配置不同。在上一个波束可以发送下一个波束的带宽配置，其中，带宽配置也可以称为带宽的资源。
当一个波位或波束方向上有两个波束相互重叠，且每个波束对应不用的带宽配置，以第一频段波束和第二频段波束为例，此时终端设备可以启动多连接传输方式或者载波聚合的方式，实现吞吐增强或者覆盖增强；或者，该波位或波束方向上的一部分终端设备接入第一频段波束，另外一部分终端设备接入第二频段波束。此时，广播波束扫描到该区域的时候可以配置两个波束的资源，终端随机的选择一个资源接入。
可选地，终端设备可以首先接入到其中一个波束，再由该波束分配另外一个波束的资源。
可选地，可以在该波位或波束方向上根据终端设备所在的地理位置区域接入不同的波束。
可选地，还可以根据隐式指示的方式指示终端设备接入对应的波束，例如，根据随机接入的参数包括随机接入序列和随机接入资源的参数接入到对应的波束当中。
其中，当第一频段波束和第二频段波束提供服务时间一致时，如图9(a)所示，可以配置一个定时器，可称为第一定时器，用于指示第一波束结束服务到第二波束提供服务的时长。
一种可能的实现方式中，终端设备可以只使用第一频段波束或第二频段波束，例如，终端设备在第一周期使用第一个第一频段波束，在下个周期使用第二个第一频段波束，即，此时第一定时器用于指示第一个第一频段波束结束服务到第二个第一频段波束提供服务的时长；又例如，终端设备在第一周期使用第一个第二频段波束，在下个周期使用第二个第二频段波束，即，此时或者第一定时器用于指示第一个第二频段波束结束服务到第二个第二频段波束提供服务的时长。
在另一种可能的实现方式中，终端设备可以交替使用第一频段波束和第二频段波束，例如，终端设备在第一周期使用第一频段波束，在下个周期使用第二频段波束，即，此时第一定时器用于指示第一个第一频段波束结束服务到第二个第二频段波束提供服务的时长；又例如，终端设备在第一周期使用第二频段波束，在下个周期使用第一频段波束，即，此时第一定时器用于指示第一个第二频段波束结束服务到第二个第一频段波束提供服务的时长。
当第一频段波束和第二频段波束提供服务时间不一致时，如图9(b)所示，可以配置两个定时器，可称为第一定时器和第二定时器，第一定时器和第二定时器均可以用于指示第一波束结束服务到第二波束提供服务的时长。
具体地，终端设备可以在第一周期使用第一个第一频段波束，在下个周期使用第二个第一频段波束，即，此时第一定时器用于指示第一个第一频段波束结束服务到第二个第一频段波束提供服务的时长；终端设备可以在第一周期使用第一个第二频段波束，在下个周期使用第二个第二频段波束，即，此时或者第二定时器用于指示第一个第二频段波束结束服务到第二个第二频段波束提供服务的时长。
此外，在本申请实施例中，还可能出现一个波位或波束方向同一时刻被多个波束覆盖，这些波束对应的频段相同，对于终端设备而言，只是接收到了更强的信号，其实现方式可参照上文中的介绍，在此不再赘述。
应理解，上述方案中以一颗卫星的多个波束为终端设备提供服务为例，介绍了本申请的技术方案，但这不应作为本申请的限定。当多颗卫星的多个波束为终端设备提供服务时，本申请的技术方案同样适用。
例如，在图10所示的场景中，无论在t＝0时刻还是t＝1时刻，均有一些波位或波束方向由两颗卫星的多个波束提供服务。在该情形下，第一波束和第二波束可以为不同卫星的波束，此时第一波束的星历信息用于指示第一波束为终端设备提供服务时的星历信息，该星历信息还包括第一波束所属于的卫星的相关参数，同理，第二波束的星历信息用于指示第二波束为终端设备提供服务时的星历信息，该星历信息还包括第二波束所属于的卫星的相关参数。当第一波束和第二波束分别是不同卫星的波束时，在第一波束的通信期间，需 要向终端设备发送使用第二波束通信时，第二波束对应的卫星的相关参数信息，第二波束对应的卫星的相关参数信息可以包括同步、定时相关的参数，还可以包括第二波束的资源配置情况。
可选地，网络设备可以根据第一波束和第二波束的不同情况，下发一个或多个定时器来维护不同卫星下多个波束的通信，该过程可参照上述技术方案，在此不再赘述。
应理解，上述以第一定时器用于指示第一波束停止服务到第二波束提供服务的时长为例，对本申请的技术方案进行说明。在本申请的基础上，通过定时器确定两个波束之间的间隔，来实现终端设备跳波束通信，都不应超出本申请的保护范围。
图11示出了本申请卫星通信方法的具体示例的另一例示意图。
S1110至S1130与图5中S510至S530相同，在此不再赘述。
S1140，终端设备接收第二定时器和第三定时器，确定第一时长。
其中，第二定时器和第三定时器承载于第一信息中，第二定时器用于指示第一波束提供服务的时长，第三定时器用于指示第一波束一个周期的时长。第一时长用于指示第一波束停止服务到第二波束提供服务的时长。其中，第一波束和第二波束的示意图可如图12所示，第二波束为第一波束之后的第一个波束。即，第三定时器的时长减去第二定时器的时长即为第一波束停止服务到第二波束提供服务的时长，也就是第一时长。
其中，第一波束和第二波束可以是相同频段的波束，也可以是不同频段的波束，其各种情形请参照上文描述，在此不再赘述。
应理解，序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。例如，当第二定时器和第三定时器承载的第一信息为广播消息时，S1140可以在S1110之后且在S1120之前。又例如，当第二定时器和第三定时器承载的第一信息未UE级别的消息时，S1140可以在S1120之后，本申请不对其进行限定。
S1150，终端设备接收第一周期，第一周期用于指示第一时长的周期。
其中，第一周期可以直接指示第一时长的周期，还可以用于指示第二定时器和第三定时器的周期，从而间接指示第一时长的周期，本申请不对其进行限定。
可选地，该第一周期可以是约定好的周期，也可以是通过其他方式确定的周期，例如隐式指示、索引对应等等，具体请参照前文描述，在此不再赘述。
S1160与图5中S560相同，为了简洁，在此不再赘述。
其中，第二波束的调度信息可以在终端使用第一波束通信时接收，也可以是第二波束来之前再进行接收，本申请对其不进行限定。
S1170，终端设备接收控制信息，控制信息用于激活第二定时器和第三定时器。
其中，第二定时器和第三定时器可以是一个配置的固定的数值，例如10ms。但作为另一种可能的实现方式，在实际使用中，为提高配置的灵活性，可以为第二定时器和/或第三定时器配置多个候选值，并通过控制信息激活其中某个候选值。作为示例而非限定，为第二定时器配置候选值集合(2ms，4ms，8ms，16ms)，通过控制信息激活候选值4ms，即表示激活第二定时器，第二定时器的持续时间为4ms。
可选地，终端设备根据控制信息激活第二定时器和第三定时器时，可以是在接收到控制信息的时隙激活第二定时器和第三定时器(即，立即激活)，也可以是在接收到控制信 息之后的一段时间激活第二定时器和第三定时器(即，延时激活)，其中，一段时间可以是几毫秒，也可以是几个时隙，或者其他时间单位，本申请不对进行限定。
S1180，终端设备在第一时长的持续内不检测调度信息。
具体地，在第一时长的持续时间内，终端设备没有被广播波束或业务波束所覆盖(即被波束提供服务)，终端设备无需监听任何信号，因此可以采用一些省功耗的模式，例如DRX等。
这样，根据本申请的技术方案，通过向终端设备发送第一信息，终端设备可以根据第一信息确定第一波束停止服务到第二波束提供服务的时长，使得终端设备可以在该时长的持续时间内不检测调度信息，从而可以进入省功耗模式，有助于减少终端的复杂度以及功耗。
S1190与图5中S590相同，在此不再赘述。
根据本申请的技术方案，通过向终端设备发送第一信息，使得终端设备可以根据第一信息确定第一波束停止服务到第二波束提供服务的时长，使用卫星的第二波束与网络设备进行通信，有助于提供更大范围的通信服务，并减少终端设备的复杂度，提升用户体验。
应理解，在本申请实施例中，通过定时器指示时长时，该时长可以是定时器开始的时刻开始计时，但在实际应用中，更可能的实现方式是，该时长在定时器开始之后的某个偏移参量开始计时，例如，第二定时器用于指示第一波束提供服务的时长，该时长可能与第二定时器的时长完全一致，也可以不同，即当第二定时器开始的几个时间单位过后，该第一波束提供服务的时长才开始计时。其中，时间单位可以是子帧、时隙或者符号等。
以上，结合图4至图12详细说明了本申请实施例提供的卫星通信的方法。上述卫星通信方法主要从各个装置之间交互的角度进行了介绍。可以理解的是，各个装置，为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
应理解，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
还应理解，在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
可以理解的是，本申请上述实施例中，由通信设备实现的方法，也可以由可配置于通信设备内部的部件(例如芯片或者电路)实现。
以下，结合图13和图14详细说明本申请实施例提供的卫星通信装置。应理解，装置实施例的描述与方法实施例的描述相互对应，因此，未详细描述的内容可以参见上文方法实施例，为了简洁，部分内容不再赘述。
本申请实施例可以根据上述方法示例对发射端设备或者接收端设备进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成 在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。下面以采用对应各个功能划分各个功能模块为例进行说明。
图13是本申请提供的卫星通信设备1300的一例示意性框图。上述方法400、方法500以及方法1300中任一方法所涉及的任一设备，如终端设备和网络设备等都可以由图13所示的卫星通信设备来实现。
应理解，卫星通信设备1300可以是实体设备，也可以是实体设备的部件(例如，集成电路，芯片等等)，还可以是实体设备中的功能模块。
如图13所示，该卫星通信设备1300包括：一个或多个处理器1310。可选地，处理器1310中可以调用接口实现接收和发送功能。所述接口可以是逻辑接口或物理接口，对此不作限定。例如，接口可以是收发电路，输入输出接口，或是接口电路。用于实现接收和发送功能的收发电路、输入输出接口或接口电路可以是分开的，也可以集成在一起。上述收发电路或接口电路可以用于代码/数据的读写，或者，上述收发电路或接口电路可以用于信号的传输或传递。
可选地，接口可以通过收发器实现。可选地，该卫星通信设备1300还可以包括收发器1330。所述收发器1330还可以称为收发单元、收发机、收发电路等，用于实现收发功能。
可选地，该卫星通信设备1300还可以包括存储器1320。本申请实施例对存储器1320的具体部署位置不作具体限定，该存储器可以集成于处理器中，也可以是独立于处理器之外。对于该卫星通信装置1300不包括存储器的情形，该卫星通信设备1300具备处理功能即可，存储器可以部署在其他位置(如，云系统)。
处理器1310、存储器1320和收发器1330之间通过内部连接通路互相通信，传递控制和/或数据信号。
可以理解的是，尽管并未示出，卫星通信设备1300还可以包括其他装置，例如输入装置、输出装置、电池等。
可选地，在一些实施例中，存储器1320可以存储用于执行本申请实施例的方法的执行指令。处理器1310可以执行存储器1320中存储的指令结合其他硬件(例如收发器1330)完成下文所示方法执行的步骤，具体工作过程和有益效果可以参见上文方法实施例中的描述。
本申请实施例揭示的方法可以应用于处理器1310中，或者由处理器1310实现。处理器1310可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，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。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软 件模块可以位于随机存取存储器(random access memory，RAM)、闪存、只读存储器(read-only memory，ROM)、可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的指令，结合其硬件完成上述方法的步骤。
可以理解，存储器1320可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器ROM、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器RAM，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
图14是本申请提供的卫星通信装置1400的示意性框图。
可选地，所述卫星通信装置1400的具体形态可以是通用计算机设备或通用计算机设备中的芯片，本申请实施例对此不作限定。如图14所示，该卫星通信装置包括处理单元1410和收发单元1420。
具体而言，卫星通信装置1400可以是本申请涉及的任一设备，并且可以实现该设备所能实现的功能。应理解，卫星通信装置1400可以是实体设备，也可以是实体设备的部件(例如，集成电路，芯片等等)，还可以是实体设备中的功能模块。
在一种可能的设计中，该卫星通信装置1400可以是上文方法实施例中的终端设备，也可以是用于实现上文方法实施例中终端设备的功能的芯片。
作为一种示例，该通信装置用于执行上文图5或图11中终端设备所执行的动作。
收发单元1420，用于接收第一信息，第一信息用于确定第一时长，第一时长用于指示第一波束停止服务到第二波束提供服务的时长，第一波束和第二波束为卫星的波束；处理单元1410，用于根据第一时长使用第二波束与网络设备进行通信。
在另一种可能的设计中，该卫星通信装置1400可以是上文方法实施例中的网络设备，也可以是用于实现上文方法实施例中网络设备功能的芯片。
作为一种示例，该通信装置用于执行上文图5中网络设备所执行的动作。
例如，处理单元1410，用于确定第一信息，第一信息用于终端设备确定第一时长，第一时长用于指示第一波束停止服务到第二波束提供服务的时长，第一波束和第二波束为卫星的波束；收发单元1420，用于向终端设备发送第一信息。
还应理解，该卫星通信装置1400为网络设备时，该卫星通信装置1400中的收发单元1420可通过通信接口(如收发器或输入/输出接口)实现。该卫星通信装置1400中的处理单元1410可通过至少一个处理器实现，例如可对应于图13中示出的处理器1310。
可选地，卫星通信装置1400还可以包括存储单元，该存储单元可以用于存储指令或 者数据，处理单元可以调用该存储单元中存储的指令或者数据，以实现相应的操作。
应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
另外，在本申请中，卫星通信装置1400是以功能模块的形式来呈现。这里的“模块”可以指特定应用集成电路ASIC、电路、执行一个或多个软件或固件程序的处理器和存储器、集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到装置1400可以采用图14所示的形式。处理单元1410可以通过图13所示的处理器1310来实现。可选地，如果图13所示的计算机设备包括存储器1320，处理单元1410可以通过处理器1310和存储器1320来实现。收发单元1420可以通过图13所示的收发器1330来实现。所述收发器1330包括接收功能和发送功能。具体的，处理器通过执行存储器中存储的计算机程序来实现。可选地，当所述装置1400是芯片时，那么收发单元1420的功能和/或实现过程还可以通过管脚或电路等来实现。可选地，所述存储器可以为所述芯片内的存储单元，比如寄存器、缓存等，所述存储单元还可以是卫星通信装置内的位于所述芯片外部的存储单元，如图13所的存储器1320，或者，也可以是部署在其他系统或设备中的存储单元，不在所述计算机设备内。
本申请的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。例如，计算机可读介质可以包括，但不限于：磁存储器件(例如，硬盘、软盘或磁带等)，光盘(例如，压缩盘(compact disc，CD)、数字通用盘(digital versatile disc，DVD)等)，智能卡和闪存器件(例如，可擦写可编程只读存储器(erasable programmable read-only memory，EPROM)、卡、棒或钥匙驱动器等)。另外，本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读介质”可包括但不限于，能够存储、包含和/或承载指令和/或数据的各种其它介质。
根据本申请实施例提供的方法，本申请还提供一种计算机程序产品，该计算机程序产品包括：计算机程序或一组指令，当该计算机程序或一组指令在计算机上运行时，使得该计算机执行图4至图12中所示实施例中任意一个实施例的方法。
根据本申请实施例提供的方法，本申请还提供一种计算机可读存储介质，该计算机可读介质存储有程序或一组指令，当该程序或一组指令在计算机上运行时，使得该计算机执行图4至图12中所示实施例中任意一个实施例的方法。
根据本申请实施例提供的方法，本申请还提供一种通信系统，其包括前述的装置或设备。
在本说明书中使用的术语“部件”、“模块”、“系统”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件、或执行中的软件。例如，部件可以是但不限于，在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序和/或计算机。通过图示，在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程和/或执行线程中，部件可位于一个计算机上和/或分布在两个或更多个计算机之间。此外，这些部件可从在上面存储有各种数据结构的各种计算机可读介质执行。部件可根据具有一个或多个数据分组(例如来自与本地系统、分布式系统和/或网络间的另一部件交互的二个部件的数据，例如通过信号与其它系统交互的互联网)的信号通过本地和/或远程进程来通信。
还应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
还应理解，本申请实施例中引入编号“第一”、“第二”等只是为了区分不同的对象，比如，区分不同的“信息”，或，“设备”，或，“单元”，对具体对象以及不同对象间的对应关系的理解应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (28)

  1. 一种卫星通信的方法，其特征在于，包括：
    终端设备接收第一信息，所述第一信息用于确定第一时长，所述第一时长用于指示第一波束停止服务到第二波束提供服务的时长，所述第一波束和所述第二波束为卫星的波束；
    所述终端设备根据所述第一时长使用所述第二波束与网络设备进行通信。
  2. 根据权利要求1所述的方法，其特征在于，所述第一信息包括第一定时器，所述第一定时器用于指示所述第一时长。
  3. 根据权利要求1所述的方法，其特征在于，所述第一信息包括第二定时器和第三定时器，所述第二定时器用于指示所述第一波束提供服务的时长，所述第三定时器用于指示所述第一波束一个周期的时长，所述方法还包括：
    所述终端设备根据所述第一波束提供服务的时长和所述第一波束一个周期的时长确定所述第一时长。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备在所述第一时长的持续时间内不检测来自所述网络设备的调度信息。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述网络设备位于卫星上，所述方法还包括：
    所述终端设备接收全球导航卫星系统GNSS定位信息和所述第二波束的星历信息，所述第二波束的星历信息用于指示所述第二波束为所述终端设备提供服务时的星历信息；
    所述终端设备根据所述GNSS定位信息和所述星历信息与所述网络设备同步。
  6. 根据权利要求1至4中任一项所述的方法，其特征在于，所述网络设备位于地面上，所述方法还包括：
    所述终端设备接收全球导航卫星系统GNSS定位信息、所述第二波束的星历信息和公共定时提前信息，所述第二波束的星历信息用于指示所述第二波束为所述终端设备提供服务时的星历信息；
    所述终端设备根据所述GNSS定位信息、所述星历信息和所述公共定时提前信息与所述网络设备同步。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收所述第二波束对应的调度信息。
  8. 根据权利要求1至7中任一项所述的方法，其特征在于，所述第一波束对应第一带宽配置，所述第二波束对应第二带宽配置，所述第一带宽配置与所述第二带宽配置相同。
  9. 根据权利要求1至7中任一项所述的方法，其特征在于，所述第一波束对应第一带宽配置，所述第二波束对应第二带宽配置，所述第一带宽配置与所述第二带宽配置不同。
  10. 根据权利要求1至9中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备获取第一周期，所述第一周期用于指示所述第一时长的周期；
    所述终端设备根据所述第一时长使用所述第二波束与网络设备进行通信，包括：
    所述终端设备根据所述第一时长和所述第一周期使用所述第二波束与网络设备进行 通信。
  11. 根据权利要求1至10中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收控制信息；
    所述终端设备根据所述控制信息激活所述第一定时器；或者，
    所述终端设备根据所述控制信息激活所述第二定时器和所述第三定时器。
  12. 一种卫星通信的方法，其特征在于，包括：
    网络设备确定第一信息，所述第一信息用于终端设备确定第一时长，所述第一时长用于指示第一波束停止服务到第二波束提供服务的时长，所述第一波束和所述第二波束为卫星的波束；
    所述网络设备向终端设备发送所述第一信息。
  13. 根据权利要求12所述的方法，其特征在于，所述第一信息包括第一定时器，所述第一定时器用于指示所述第一时长。
  14. 根据权利要求12所述的方法，其特征在于，所述第一信息包括第二定时器和第三定时器，所述第二定时器用于指示所述第一波束提供服务的时长，所述第三定时器用于指示所述第一波束一个周期的时长。
  15. 根据权利要求12至14中任一项所述的方法，其特征在于，所述方法还包括：
    所述网络设备在所述第一时长的持续时间内不向所述终端设备发送调度信息。
  16. 根据权利要求12至15中任一项所述的方法，其特征在于，所述网络设备位于卫星上，所述方法还包括：
    所述网络设备发送全球导航卫星系统GNSS定位信息和所述第二波束的星历信息，所述第二波束的星历信息用于指示所述第二波束为所述终端设备提供服务时的星历信息，所述GNSS定位信息和所述星历信息用于所述终端设备与所述网络设备同步。
  17. 根据权利要求12至15中任一项所述的方法，其特征在于，所述网络设备位于地面上，所述方法还包括：
    所述网络设备发送全球导航卫星系统GNSS定位信息、所述第二波束的星历信息和公共定时提前信息，所述第二波束的星历信息用于指示所述第二波束为所述终端设备提供服务时的星历信息，所述GNSS定位信息、所述星历信息和所述公共定时提前信息用于所述终端设备与所述网络设备同步。
  18. 根据权利要求12至17中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收所述第二波束对应的调度信息。
  19. 根据权利要求12至18中任一项所述的方法，其特征在于，所述第一波束对应第一带宽配置，所述第二波束对应第二带宽配置，所述第一带宽配置与所述第二带宽配置相同。
  20. 根据权利要求12至18中任一项所述的方法，其特征在于，所述第一波束对应第一带宽配置，所述第二波束对应第二带宽配置，所述第一带宽配置与所述第二带宽配置不同。
  21. 根据权利要求12至20中任一项所述的方法，其特征在于，所述方法还包括：
    所述网络设备发送第一周期，所述第一周期用于指示所述第一时长的周期。
  22. 根据权利要求10至21中任一项所述的方法，其特征在于，所述方法还包括：
    所述网络设备发送控制信息，所述控制信息用于激活所述第一定时器；或者，
    所述控制信息用于激活所述第二定时器和所述第三定时器。
  23. 一种通信装置，其特征在于，包括：
    存储器，用于存储计算机指令；
    处理器，用于执行所述存储器中存储的计算机指令，使得所述通信装置执行如权利要求1至11中任一项所述的方法。
  24. 一种通信装置，其特征在于，包括：
    存储器，用于存储计算机指令；
    处理器，用于执行所述存储器中存储的计算机指令，使得所述通信装置执行如权利要求12至22中任一项所述的方法。
  25. 一种计算机可读存储介质，其特征在于，其上存储有计算机程序，所述计算机程序被通信装置执行时，使得如权利要求1至22中任一项所述方法被执行。
  26. 一种包含指令的计算机程序产品，其特征在于，当其在计算机上运行时，使得如权利要求1至22中任一项所述方法被执行。
  27. 一种芯片系统，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序或指令，使得安装有所述芯片系统的通信装置实现如权利要求1至22中任一项所述的方法。
  28. 一种通信系统，其特征在于，包括：终端设备和网络设备，其中所述终端设备用于执行权利要求1至11中任一项所述方法，所述网络设备用于执行权利要求12至22中任一项所述方法。
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CN101001198A (zh) * 2006-01-10 2007-07-18 中兴通讯股份有限公司 硬切换过程中的业务数据包的处理方法
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