WO2021190526A1 - 卫星星历更新的方法和通信装置 - Google Patents
卫星星历更新的方法和通信装置 Download PDFInfo
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- WO2021190526A1 WO2021190526A1 PCT/CN2021/082555 CN2021082555W WO2021190526A1 WO 2021190526 A1 WO2021190526 A1 WO 2021190526A1 CN 2021082555 W CN2021082555 W CN 2021082555W WO 2021190526 A1 WO2021190526 A1 WO 2021190526A1
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- ephemeris
- satellite
- terminal device
- network element
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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
- H04B7/18519—Operations control, administration or maintenance
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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
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18539—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection
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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
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18545—Arrangements for managing station mobility, i.e. for station registration or localisation
- H04B7/18547—Arrangements for managing station mobility, i.e. for station registration or localisation for geolocalisation of a station
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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
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18558—Arrangements for managing communications, i.e. for setting up, maintaining or releasing a call between stations
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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
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18569—Arrangements for system physical machines management, i.e. for construction operations control, administration, maintenance
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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
- H04B7/19—Earth-synchronous stations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
- G01S19/05—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing aiding data
Definitions
- This application relates to the field of satellite communication, and more specifically, to a method and communication device for updating satellite ephemeris.
- the characteristic of terminal equipment communicating via satellite is that the coverage and inclination of the beam will change continuously.
- the terminal equipment needs to search for available networks before successfully accessing the satellite network. Because the visible antenna angle of the satellite cell covered by the satellite is much narrower than that of the ground cell, and the satellite is constantly moving, these increase the terminal equipment access to the satellite network by searching The difficulty of the satellite cell. If the terminal device does not have the location information of the satellite and directly searches the satellite cell blindly, it may take several hours to successfully search the network, which seriously affects the user experience. By providing the ephemeris of the terminal equipment satellites, the efficiency of the terminal equipment searching the network can be greatly improved.
- the ephemeris of the satellite serving the terminal equipment may change.
- the ephemeris stored in the terminal equipment cannot be updated effectively and timely, which will cause the accuracy of the orbit or satellite position predicted by the terminal equipment to decrease, which will take longer to successfully access the satellite cell and increase the number of terminals.
- the delay of device communication reduces communication efficiency and user experience.
- This application provides a method and communication device for updating satellite ephemeris, which can notify terminal equipment of ephemeris update information in time, so that the terminal equipment can obtain the updated ephemeris in a timely and effective manner, and reduce the terminal equipment’s access to satellite cells. Time delay, thereby improving communication efficiency and user experience.
- a method for updating satellite ephemeris includes: a first network element determines whether the ephemeris in a terminal device needs to be updated; the first network element sends first information to the terminal device, and the first network element One information includes: updated ephemeris or indication information that the ephemeris has not changed.
- the first network element may be a core network element.
- the first network element may be AMF or SMF.
- the first aspect provides a method for updating satellite ephemeris, which notifies terminal equipment of the update of the ephemeris. If the ephemeris has been changed, the core network side (or core network element) can obtain the latest ephemeris in a timely manner, without waiting for the request of the terminal device, so that the terminal device can obtain the updated ephemeris in a timely and effective manner, improving The accuracy of the orbit or the position of the satellite predicted by the terminal equipment reduces the time delay for the terminal equipment to access the satellite cell, thereby improving communication efficiency and user experience.
- the first network element may not send the indication information that the ephemeris has not changed to the terminal device, and the terminal device Without receiving the indication information sent by the AMF that the ephemeris has not changed or the updated ephemeris, the default ephemeris has not changed, and the first terminal device can continue to use the previous ephemeris to search for satellites and access the satellite cell.
- the method further includes: the first network element receives ephemeris update indication information from the terminal device, and the ephemeris update indication information is used to instruct to update the ephemeris in the terminal device.
- Ephemeris The first network element may determine whether the ephemeris in the terminal device needs to be updated according to the ephemeris update indication information.
- the terminal device sends the ephemeris update instruction information to the first network element, and the first network element (for example, AMF) determines whether the ephemeris has changed accordingly.
- the first network element does not need to actively track the change of the ephemeris, which reduces the overhead and burden of the first network element.
- the terminal device can obtain the latest ephemeris in time, and when the ephemeris has not changed or the degree of change is not significant, the first network element does not need to send the ephemeris update indication information, which can reduce signaling consumption.
- the ephemeris update indication information can be carried in any kind of uplink NAS message, or carried in other possible signaling.
- the uplink NAS message sent by the terminal device to the first network element may not include the ephemeris update indication.
- the NAS message itself can be used for the purpose of requesting the network to send the latest ephemeris to the terminal device.
- the ephemeris update indication information includes one or more of a satellite identifier or an orbit identifier
- the satellite identifier includes an identifier of the first satellite serving the terminal device
- the orbit identifier includes The identification of the orbit of the first satellite.
- the first satellite may include one or more satellites.
- the first satellite that serves the terminal device includes one or more of the satellite that currently serves the terminal device or the satellite that will serve the terminal device.
- the satellite identifier includes the identifier of the first satellite serving the terminal device
- the orbit identifier includes the identifier of the orbit where the first satellite is located
- the orbit where the first satellite is located may be one or more orbits.
- the ephemeris may include: the ephemeris of the satellites identified by one or more satellite identifiers, and/or the ephemeris of all the satellites in the orbits identified by the one or more orbit identifiers.
- the ephemeris may be the ephemeris of the entire satellite system.
- the ephemeris of the first satellite may also be referred to as the ephemeris stored in the terminal device.
- the ephemeris update indication information further includes: at least one of the accuracy of the ephemeris change, the validity period of the ephemeris, or the reference time of the ephemeris, where the ephemeris change
- the accuracy indicates the accuracy requirement of the terminal device for changing the ephemeris
- the validity period of the ephemeris includes the validity period of the ephemeris of the first satellite
- the reference time of the ephemeris includes the time when the ephemeris of the first satellite starts to be used.
- the validity period of the ephemeris includes the validity period of the ephemeris stored in the terminal device
- the reference time of the ephemeris includes the time when the ephemeris stored in the terminal device starts to be used.
- the first network element determines whether the ephemeris in the terminal device needs to be updated according to the ephemeris update indication information, which can improve the accuracy of the ephemeris update and avoid unnecessary ephemeris updates.
- the validity period of the ephemeris may be a period of time starting from the reference time, for example, valid within one day from the reference time; it may also be the expiration time of the validity of the ephemeris.
- the reference time of the ephemeris may also be another specific reference time point related to the ephemeris, for example, it may be the time when the ephemeris was received or configured last time.
- the method further includes: the first network element sends a first request to the second network element, and the first network element A request is used to request the updated ephemeris; the first network element receives the first information from the second network element.
- the network side can obtain the latest ephemeris in time without waiting for a request from the terminal device.
- the terminal device can obtain the updated ephemeris in a timely and effective manner, improve the accuracy of the orbit or the position of the satellite predicted by the terminal device, and reduce the time delay for the terminal device to access the satellite cell, thereby improving communication efficiency and user experience.
- the first information may be included in the current message type as a new information element, it may also be a new message type, or in other forms.
- the first request includes one or more of a satellite identification or an orbit identification, wherein the satellite identification includes an identification of the first satellite serving the terminal device, and the orbit identification Including the identification of the orbit of the first satellite serving the terminal device.
- the first network element determining whether the ephemeris in the terminal device needs to be updated includes: the first network element determines whether the ephemeris in the terminal device needs to be updated according to the ephemeris update indication information need to be updated.
- the first network element determining that the ephemeris in the terminal device needs to be updated includes: the first network element changes the accuracy of the ephemeris according to the terminal device and the updated ephemeris Ephemeris, determining that the difference between the updated ephemeris and the ephemeris in the terminal device meets the accuracy requirements of the terminal device for the ephemeris change, and the accuracy of the ephemeris change indicates the accuracy requirement of the terminal device for the ephemeris change .
- determining that the ephemeris in the terminal device needs to be updated by the first network element includes: the first network element according to the validity period of the ephemeris of the terminal device and the updated ephemeris , It is determined that the ephemeris in the terminal device has exceeded the validity period, and the validity period of the ephemeris includes the validity period of the ephemeris of the first satellite serving the terminal device.
- the first network element determining that the ephemeris in the terminal device needs to be updated includes: the first network element according to the reference time of the ephemeris of the terminal device and the updated ephemeris Ephemeris, determining that the time to start using the ephemeris in the terminal device has changed, and the reference time of the ephemeris includes the time when the ephemeris of the first satellite serving the terminal device starts to be used.
- the method further includes: the first network element determines a satellite identifier or an orbit identifier according to one or more of the position information or the movement model of the terminal device, wherein the satellite The identifier includes the identifier of the first satellite serving the terminal device, and the orbit identifier includes the identifier of the orbit where the first satellite serving the terminal device is located.
- the first network element is an access and mobility management network element.
- the second network element is a satellite access network device, an application function network element, or a core network network element.
- the ephemeris includes one or more of satellite-level parameters or orbital plane parameters.
- a method for updating satellite ephemeris includes: a second network element determines whether the ephemeris of the satellite has changed; the second network element sends first information to the first network element, and the first network element The information includes: updated ephemeris or indication information that the ephemeris has not changed.
- the second network element may be a satellite access network device (for example, SAT RAN), an application function network element (for example, AF), or other core network network elements.
- the first network element may be an access and mobility management network element (for example, AMF), a capability opening network element (for example, NEF), or another core network element.
- the second aspect provides a method for updating satellite ephemeris.
- the network side can obtain whether the ephemeris has changed in a timely manner.
- the change information of the ephemeris is notified to the terminal equipment, so that the terminal equipment can obtain the updated ephemeris in a timely and effective manner, improve the accuracy of the orbit or satellite position predicted by the terminal equipment, and reduce the time delay for the terminal equipment to access the satellite cell, thereby increasing Communication efficiency and user experience.
- the first information may be notified to the terminal device through a downlink NAS message or other signaling, or after the first network element sends the ephemeris update instruction information Send the first information to the terminal device.
- the first network element may not send the indication information that the ephemeris has not changed to the terminal device, and the terminal device If the first network element does not receive the indication that the ephemeris has not changed or the updated ephemeris, the default ephemeris has not changed, and the first terminal device can continue to use the previous ephemeris to search for satellites and access the satellites Community.
- the first information may be included in the current message type as a new information element, it may also be a new message type, or in other forms.
- the method further includes: the second network element receiving a first request from the first network element, the first request being used to request the updated ephemeris information; According to the first request, the second network element determines that the updated ephemeris or ephemeris has not changed. In this implementation manner, the second network element does not need to actively track the change of the ephemeris, which reduces the overhead and burden of the second network element. In addition, when the ephemeris has not changed or the degree of change is not large, the second network element does not need to send the first information, which can reduce signaling consumption.
- the first request may be included in the current message type as a new information element, or it may be a new message type, or in other forms.
- the first request includes one or more of a satellite identification or an orbit identification, wherein the satellite identification includes an identification of the first satellite serving the terminal device, and the orbit identification includes a service The identification of the orbit of the first satellite.
- the first request further includes: at least one of the accuracy of the ephemeris change, the validity period of the ephemeris, or the reference time of the ephemeris, wherein the accuracy of the ephemeris change indicates
- the terminal device has a precision requirement for changing the ephemeris, the validity period of the ephemeris includes the validity period of the ephemeris of the first satellite, and the reference time of the ephemeris includes the time when the ephemeris of the first satellite starts to be used.
- the first request includes the accuracy of the ephemeris change
- the second network element determining that the ephemeris of the satellite has changed includes: the second network element changes the accuracy according to the ephemeris With the updated ephemeris, it is determined that the difference between the updated ephemeris and the pre-updated ephemeris meets the accuracy requirement.
- the first request includes the validity period of the ephemeris
- the second network element determining that the ephemeris of the satellite has changed includes: the second network element according to the validity period of the ephemeris and the ephemeris After the updated ephemeris, it is determined that the ephemeris of the first satellite has exceeded the validity period.
- the first request includes the reference time of the ephemeris
- the second network element determining that the ephemeris of the satellite has changed includes: the second network element according to the reference time of the ephemeris With the updated ephemeris, it is determined that the time to start using the ephemeris of the first satellite has changed.
- the second network element is a satellite access network device
- the method further includes: the satellite access network device according to the location information of the terminal device corresponding to the satellite's ephemeris or One or more of the mobile models determine the latest ephemeris of the first satellite serving the terminal device, and the updated ephemeris includes the latest ephemeris of the first satellite serving the terminal device, wherein the satellite identifier includes the service The identification of the first satellite of the terminal device, and the orbit identification includes the identification of the orbit where the first satellite serving the terminal device is located.
- the first network element is an access and mobility management network or a capability opening network element.
- the second network element is an application function network element, a satellite access network device, or a core network network element.
- the ephemeris includes one or more of satellite-level parameters or orbital plane parameters.
- a communication device in a third aspect, includes a unit for executing the steps in the above first aspect or any possible implementation of the first aspect.
- a communication device which includes at least one processor and a memory, and the at least one processor is configured to execute the above second aspect or any possible implementation of the second aspect.
- a communication device in a fifth aspect, includes at least one processor and an interface circuit, and the at least one processor is configured to execute the above first aspect or the method in any possible implementation of the first aspect.
- the communication device may be AMF, SMF, or other core network elements.
- a communication device in a sixth aspect, includes at least one processor and an interface circuit, and the at least one processor is configured to execute the above second aspect or the method in any possible implementation manner of the second aspect.
- the communication device may be a satellite access network device, an application function network element, or other core network network elements.
- a core network device in a seventh aspect, includes: the communication device provided in the third aspect or the fifth aspect described above.
- the core network equipment may be AMF, SMF, or other core network network elements.
- a satellite access network device includes: the communication device provided in the foregoing fourth aspect or sixth aspect.
- a communication system in a ninth aspect, includes: the communication device provided in the third, fifth, or seventh aspect, and the communication provided in the fourth, sixth, or eighth aspect. Device.
- the communication system further includes terminal equipment.
- a computer program product includes a computer program.
- the computer program product includes a computer program.
- the computer program is executed by a processor, it is used to execute the method in the first aspect or any possible implementation of the first aspect, Or, used to execute the second aspect or the method in any possible implementation manner of the second aspect.
- a computer-readable storage medium stores a computer program, and when the computer program is executed, it is used to execute the first aspect or any possible implementation manner of the first aspect Or execute the method in the second aspect or any possible implementation of the second aspect.
- a chip or integrated circuit includes a processor for calling and running a computer program from a memory, so that a device installed with the chip or integrated circuit executes the first aspect or The method in any possible implementation manner of the first aspect, or the second aspect or the method in any possible implementation manner of the second aspect is executed.
- the network side notifies the terminal equipment of the ephemeris update information in time, so that the terminal equipment can obtain the updated ephemeris in a timely and effective manner, and improve the orbit predicted by the terminal equipment Or the accuracy of the satellite's position reduces the time delay for terminal equipment to access the satellite cell, thereby improving communication efficiency and user experience.
- Fig. 1 is a schematic block diagram of an example of a wireless communication system architecture applicable to the present application.
- Figure 2 is a schematic diagram of the physical meaning of some satellite ephemeris parameters.
- Fig. 3 is a schematic interaction diagram of a method for updating satellite ephemeris according to an embodiment of the present application.
- Fig. 4 is a schematic interaction diagram of a method for updating satellite ephemeris according to another embodiment of the present application.
- Fig. 5 is a schematic interaction diagram of a method for updating satellite ephemeris according to another embodiment of the present application.
- Fig. 6 is a schematic interaction diagram of a method for updating satellite ephemeris according to another embodiment of the present application.
- Fig. 7 is a schematic interaction diagram of a method for updating satellite ephemeris according to another embodiment of the present application.
- Fig. 8 is a schematic interaction diagram of a method for updating satellite ephemeris according to another embodiment of the present application.
- FIG. 9 is a schematic block diagram of an example of the structure of a communication device provided by an embodiment of the present application.
- FIG. 10 is a schematic block diagram of another example of the structure of a communication device according to an embodiment of the present application.
- FIG. 11 is a schematic block diagram of another example of the structure of a communication device provided by an embodiment of the present application.
- FIG. 12 is a schematic block diagram of another example of the structure of a communication device according to an embodiment of the present application.
- FIG. 13 is a schematic block diagram of an example of the structure of a satellite access network device provided by an embodiment of the present application.
- first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the present embodiment, unless otherwise specified, “plurality” means two or more.
- various aspects or features of the present application can be implemented as methods, devices, or products using standard programming and/or engineering techniques.
- article of manufacture used in this application encompasses a computer program accessible from any computer-readable device, carrier, or medium.
- computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CD), digital versatile discs (DVD)) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
- various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
- machine-readable medium may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.
- LTE Long Term Evolution
- FDD Frequency Division Duplex
- Time Division Duplex Time Division Duplex
- TDD Universal Mobile Telecommunication System
- UMTS Universal Mobile Telecommunication System
- WiMAX Worldwide Interoperability for Microwave Access
- 5G 5th Generation
- New Radio New Radio
- NR New Radio
- the terminal equipment in the embodiments of this application may refer to user equipment, access terminals, user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device.
- the terminal device can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), and wireless communication.
- SIP Session Initiation Protocol
- WLL Wireless Local Loop
- PDA Personal Digital Assistant
- Fig. 1 is a schematic block diagram of an example of a wireless communication system architecture applicable to the present application.
- the system architecture includes terminal equipment, radio access network equipment (Radio Access Network, RAN), core network equipment, and data network (DN). It adopts a service-based form of expression.
- the terminal device in FIG. 1 can be used to connect to a wireless access network device deployed by an operator through a wireless air interface, and then connect to a data network through a core network device.
- the wireless access network equipment is mainly used to implement wireless physical layer functions, resource scheduling and wireless resource management, wireless access control, and mobility management; core network equipment (also called management equipment) is mainly used for terminal equipment equipment Registration, security authentication, mobility management and location management, etc.
- FIG. 1 is only an exemplary architecture diagram.
- the network architecture may also include other functional units or functional network elements, which are not limited in the embodiment of the present application.
- the terminal device shown in FIG. 1 can be any of the above-mentioned possible terminal devices, for example, it can be a mobile phone, a computer, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, Smart phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), computers, laptops, handheld communication devices, handheld computing devices, satellite wireless devices, wireless modems Card, TV set top box (STB), customer premise equipment (CPE) and/or other equipment used for communication on the wireless system.
- SIP session initiation protocol
- WLL wireless local loop
- PDAs personal digital assistants
- computers laptops, handheld communication devices, handheld computing devices, satellite wireless devices, wireless modems Card, TV set top box (STB), customer premise equipment (CPE) and/or other equipment used for communication on the wireless system.
- STB TV set top box
- CPE customer premise equipment
- the above-mentioned radio access network equipment may be an access network (AN)/radio access network (RAN) equipment, a network composed of multiple 5G-AN/5G-RAN nodes, the 5G-AN /5G-RAN nodes can be: access point (AP), next-generation base station (NR nodeB, gNB), central unit (CU) and distributed unit (DU) separated form gNB , Transmission Receive Point (TRP), Transmission Point (TP), or some other access node.
- AP access point
- NR nodeB next-generation base station
- CU central unit
- DU distributed unit separated form gNB
- TRP Transmission Receive Point
- TP Transmission Point
- the above-mentioned core network equipment may include: unified data management (UDM), access and mobility function (AMF), and session management function.
- These functional units can work independently, or can be combined together to achieve certain control functions, such as: AMF, SMF and PCF can be combined together as a management device to complete terminal device access authentication, security encryption, location registration, etc.
- Access control and mobility management functions, as well as session management functions such as the establishment, release and modification of user plane transmission paths, as well as the function of analyzing some slice-related data (such as congestion) and terminal device-related data.
- each functional unit can establish a connection through a next generation network (NG) interface to achieve communication, such as: a terminal device communicates with a RAN device through a new radio (NR) interface Establish an air interface connection for the transmission of user plane data and control plane signaling; terminal equipment can establish a control plane signaling connection with AMF through NG interface 1 (abbreviated as N1); RAN equipment can communicate with offloading points through NG interface 3 (abbreviated as N3) UPF establishes a user plane data connection; RAN equipment can establish a control plane signaling connection with AMF through NG interface 2 (abbreviated as N2); UPF can exchange user plane data with a data network through NG interface 6 (abbreviated as N6).
- Each core network element can communicate with other core network elements through a corresponding interface. For example, other core network elements can communicate with the NSSF through the Nnssf interface, and other core network elements can communicate with the NEF through the Nnef interface.
- the part shown in FIG. 1 is only an exemplary architecture diagram.
- the network architecture may also include other functional units or functional network elements.
- the implementation of this application The example does not limit this.
- interfaces between network elements in this application are only exemplary, and interfaces between network elements may also have other names, and the embodiments of this application do not limit the names of interfaces.
- the radio access network equipment in the embodiments of the present application may be equipment used to communicate with terminal devices and core network equipment.
- the radio access network equipment may be a global system of mobile communication (GSM).
- GSM global system of mobile communication
- CDMA code division multiple access
- base transceiver station, BTS can also be a wideband code division multiple access (wideband code division multiple access, WCDMA) system base station (NodeB, NB), it can also be an evolved base station (evolutional nodeb, eNB or eNodeB) in the LTE system, or a radio controller in the cloud radio access network (CRAN) scenario, or the access network
- the device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a 5G network, or an access network device in a future evolved PLMN network, etc., which is not limited in the embodiment of the present application.
- the wireless access network device may also be referred to as a wireless satellite access network site (or a wireless satellite access network device, a wireless satellite access network device). ), satellite access network site (or satellite access network equipment, satellite access network) or satellite network site (or satellite network equipment or satellite network), which is not limited in the embodiment of the present application. Satellite access networks can have multiple deployment methods. For example, the same PLMN has both a terrestrial 3GPP access network and a satellite 3GPP access network.
- the two access networks have independent interfaces with the core network; another example: Different core networks share the same satellite access network, and the shared satellite access network will include the available PLMN in the broadcast system information; another example: the ground access network and the satellite access network are independent, that is, the ground access network and The satellite access network corresponds to an independent PLMN; another example: the satellite in the sky is only responsible for signal transmission and does not have the function of accessing the network.
- satellite access can also be called satellite backhaul.
- the satellite may include all or part of the network access function, which is not limited in this application.
- the satellite access network equipment can be understood as a part of the equipment of the base station on the satellite, and the related signaling and data processing of the access network are all performed on the satellite.
- the satellite access network equipment can be understood as the equipment of the base station part function on the satellite and the equipment of the base station part function on the ground, and the related signaling and data of the access network The processing takes place partly on the satellite and partly on the ground.
- the satellite access network equipment can be understood as a base station on the ground.
- the related signaling and data processing of the access network are all performed on the ground.
- the satellite transparently transmits signaling and data between the terminal equipment and the satellite access network. .
- base stations in satellite communications may be collectively referred to as satellite radio access network equipment (satellite radio access network, SAT RAN).
- satellite radio access network equipment satellite radio access network, SAT RAN
- the satellites can be divided into synchronous satellites and non-synchronous satellites.
- the altitude of the synchronous satellite is 35786KM.
- the advantage of the synchronous satellite is that the speed of the satellite is the same as that of the earth, the coverage is large, and the coverage will not move over time.
- the disadvantage is that the communication delay is large due to the high altitude.
- the altitude of non-synchronous satellites is generally between 500KM and 45000KM, and the orbits of non-synchronous satellites can be further divided into low orbits, medium orbits and high orbits.
- the advantage of non-synchronous satellites is that the satellite time delay is lower than that of synchronous satellites.
- the disadvantage is that the coverage area is smaller than that of synchronous satellites and the coverage moves with time.
- the terminal equipment Before terminal equipment can successfully access the network, it needs to search for available networks. Different from the coverage of wireless base stations on the ground, the visible antenna angle of satellite cells covered by satellites is much narrower than that of ground cells, and the satellites are constantly moving. Search the difficulty of satellite network access to the satellite cell. If the terminal device does not have the location information of the satellite and directly searches the satellite cell blindly, it may take several hours to successfully search the network, which seriously affects the user experience.
- Ephemeris also called ephemeris, ephemeris, almanac, etc.
- the 3GPP RAN working group introduced satellite ephemeris data (or satellite ephemeris parameters) at the RAN2#108 meeting.
- the terminal device can search the network based on the satellite ephemeris data, thereby improving the user experience.
- the basic elements (parameters) included in the satellite ephemeris determined by the RAN2#108 meeting are shown in Table 1 below:
- Figure 2 is a schematic diagram showing the physical meaning of some of the satellite ephemeris parameters shown.
- the ascending node refers to the point of intersection with the earth's equatorial plane when the satellite passes through the earth's equatorial plane from south to north.
- the argument of the periacentric refers to the angle that the satellite travels from the ascending node to the perigee in the satellite's orbital plane, and its value is a degree ranging from 0 to 360°.
- Table 1 is only an exemplary description of some specific parameters that the satellite ephemeris parameters may include.
- the satellite ephemeris parameters may not include one or more of the above parameters, or may include other types.
- the specific content of the satellite ephemeris parameter is not limited in the embodiment of this application.
- the satellite ephemeris may also be referred to as ephemeris parameters, satellite ephemeris parameters, satellite ephemeris parameters in the satellite access network, satellite ephemeris parameters in the satellite backhaul, or Other possible names are not limited in this application.
- the ephemeris parameters take up a lot of space.
- the ephemeris configuration is configured in a pre-configured manner.
- the first type pre-configure all orbital parameters and all satellite parameters that may serve the terminal device in the terminal device. Based on this, the terminal equipment can predict the position of the satellite, search for the satellite network and access the satellite cell.
- the second type pre-configure the orbital parameters of all orbits that may serve the terminal device in the terminal device.
- the terminal device searches for a cell within the track range.
- the satellite broadcasts the satellite parameters in the orbit, and the terminal equipment predicts the position of the satellite based on this and connects to the network.
- the ephemeris of the satellite serving the terminal equipment may change.
- the satellite ephemeris changes there are currently two possible ways to update. 1. Update on the terminal through the application layer. This method needs to rely on applications, is not reliable, has weak timeliness, and risks exposing terminal locations and capabilities to third parties. 2. Broadcast the updated parameters through the access network. However, due to the limited size of the broadcast signaling of the access network, and the satellite ephemeris data of a single satellite may be limited, a single satellite may be required to broadcast multiple times, or multiple satellites may broadcast independently, resulting in large signaling consumption and untimely signaling. Neither of the above two methods can update the satellite ephemeris in a timely and effective manner.
- the terminal equipment cannot obtain the updated ephemeris in a timely and effective manner, which will cause the accuracy of the orbit or the position of the satellite predicted by the terminal equipment to decrease, and it will take longer to successfully access the satellite cell. , Increase the communication delay of the terminal equipment, reduce the communication efficiency, and affect the user experience.
- this application provides a method for updating satellite ephemeris to notify the terminal device of the ephemeris update information in time, so that the terminal device can obtain the updated ephemeris in a timely and effective manner, and improve the orbit orbit predicted by the terminal device.
- the accuracy of the satellite's position reduces the time delay for terminal equipment to access the satellite cell, thereby improving communication efficiency and user experience.
- FIG. 3 is a schematic flowchart of a method 200 for updating satellite ephemeris according to an embodiment of the present application. As shown in FIG. 3, the method 200 may include S210 to S220.
- the first network element determines whether the ephemeris in the terminal device needs to be updated.
- the first network element sends first information to the terminal device, where the first information includes: updated ephemeris or indication information indicating that the ephemeris has not changed.
- the first network element determines whether the ephemeris in the terminal device needs to be updated.
- the ephemeris in the terminal device may be understood as one or more of the ephemeris of the current terminal device or the satellite that will serve the terminal device in the satellite access network.
- the ephemeris may include the corresponding ephemeris of one or more satellites.
- the ephemeris may include one or more orbital plane parameters and/or one or more satellite level parameters. Etc., for orbital plane parameters and/or satellite-level parameters, please refer to the description in Table 1.
- the ephemeris may include: the ephemeris of one or more satellites, and/or, the ephemeris of all satellites in one or more orbits, or the ephemeris may also be an ephemeris. The whole, even including the ephemeris of the entire satellite system.
- the ephemeris may include one or more of a satellite-level ephemeris or an orbit-level ephemeris.
- the ephemeris in the terminal device can also be understood as the ephemeris stored in the terminal device.
- the first network element may be a core network element.
- the first network element may be AMF, or SMF, etc.
- the specific form of the first network element is not limited in the embodiment of the present application.
- the first network element determines whether the ephemeris in the terminal device needs to be updated.
- the AMF may determine the satellite identification or orbit identification according to one or more of the location of the terminal device or the mobility pattern (Mobility Pattern).
- the satellites here include one or more of the current service terminal equipment or the satellites that will serve the terminal equipment, and then according to the parameters included in the locally stored ephemeris, for example, the accuracy of the ephemeris change (or can also be called the ephemeris accuracy) ), the reference time of the ephemeris, the validity period of the ephemeris, etc., are compared with the ephemeris of the satellite indicated by the determined satellite identification or orbit identification, for example, the accuracy of the ephemeris has changed beyond the requirements, or the accuracy of the ephemeris has not been able to meet the requirements , The validity period of the ephemeris has expired, or the reference time of the ephemeris has changed, etc., it is determined that the ephemeris in the terminal device needs to be updated.
- the accuracy of the ephemeris change or can also be called the ephemeris accuracy
- the accuracy of the ephemeris change indicates the accuracy requirements of the terminal device for the ephemeris change.
- the validity period of the ephemeris indicates the time of the ephemeris used by the terminal equipment. It is a length of time or a period of time. Exceeding this period of time indicates that the validity period of the ephemeris has passed, and the ephemeris can no longer be used or the error after use is large.
- the reference time of the ephemeris indicates the time period when the ephemeris starts to be used, and is a point in time.
- the reference time of the ephemeris and the start time of the validity period of the ephemeris can be the same.
- the first network element After determining whether the ephemeris in the terminal device needs to be updated, in S220, the first network element sends first information to the terminal device.
- the first information includes: the updated ephemeris or indication information that the ephemeris has not changed .
- the first information may be any kind of downlink NAS information. If the first information includes the updated ephemeris, the terminal device can search for satellites according to the updated ephemeris and access the satellite cell. If the first information includes information indicating that the ephemeris has not changed, the first terminal device can continue to use the previous ephemeris to search for satellites and access the satellite cell.
- the first network element may directly send the first information to the terminal device through a downlink NAS message, such as a terminal device configuration update message. If the validity period of the ephemeris of the terminal device is approaching (it can be judged according to the threshold and the transmission delay), the first information is sent through the terminal device configuration update message. Alternatively, the first network element may wait for the terminal device to send the uplink NAS message, and then send the updated ephemeris or the indication information that the ephemeris has not changed to the terminal device through the downlink NAS message.
- a downlink NAS message such as a terminal device configuration update message.
- the first network element may send the first information to the terminal device through other downlink signaling methods.
- the first network element sends the first information to the access network, and the access network sends the first information to the terminal device.
- the information is sent to the terminal device.
- the embodiment of the present application does not limit the manner in which the first network element sends the first information to the terminal device.
- the satellite ephemeris update method provided in this application notifies the terminal equipment of the ephemeris update in a non-access-stratum (NAS) manner. If the ephemeris has been changed, the core network side (or core network element) can obtain the latest ephemeris in a timely manner, without waiting for the request of the terminal device, so that the terminal device can obtain the updated ephemeris in a timely and effective manner, improving The accuracy of the orbit or the position of the satellite predicted by the terminal equipment reduces the time delay for the terminal equipment to access the satellite cell, thereby improving communication efficiency and user experience.
- NAS non-access-stratum
- the first network element may not send the indication information that the ephemeris has not changed to the terminal device, and the terminal device If the first network element does not receive the indication that the ephemeris has not changed or the updated ephemeris, the default ephemeris has not changed, and the first terminal device can continue to use the previous ephemeris to search for satellites and access the satellites Community.
- FIG. 4 is a schematic flowchart of a method for updating satellite ephemeris in some embodiments of the present application, based on the method steps shown in FIG. 3 ,
- the method 200 further includes: S209.
- the first network element receives the ephemeris update instruction information from the terminal device, that is, the terminal device sends the ephemeris update instruction information to the first network element, and the ephemeris update instruction information is used to instruct to update the ephemeris update instruction information in the terminal device.
- Ephemeris
- steps S210 and S220 shown in FIG. 4 reference may be made to the above-mentioned related descriptions of S210 and S220. For brevity, details are not repeated here.
- the terminal device can actively send the ephemeris update indication information to the core network element (the first network element).
- the ephemeris update indication information can be carried in any kind of uplink NAS message, or carried in other possible information. Lingzhong.
- the terminal device first sends the ephemeris update instruction information to the satellite access network device, and the satellite access network device then sends the ephemeris update instruction information to the first network element.
- the embodiment of this application does not limit the manner in which the terminal device sends the ephemeris update indication information to the first network element.
- the terminal device may send the ephemeris update indication information to the first network element in the following situations.
- the first situation the terminal device is in the connected state, that is, the connection between the terminal device and the current SAT RAN is still there, and the validity period of the ephemeris in the terminal device has expired, in order to prevent the network search caused by the change of the ephemeris when entering the idle state next time Difficulty, need to initiate an ephemeris change. Therefore, the terminal device can carry the ephemeris update indication information by sending a mobile registration request, a service request or other possible uplink signaling.
- the second situation The terminal device is in the connected state, and the validity period of the ephemeris in the terminal device has not expired, but the terminal device has moved outside the registration area issued by the network side during the last registration, in order to prevent the terminal device from entering the idle state next time It is necessary to initiate an ephemeris change due to the possibility of switching orbits or difficulty in searching the network caused by satellites.
- the terminal device generally initiates mobile registration, and the mobile registration request may include the ephemeris update indication information.
- the third case the terminal device is initially registered to the network, and the network side may need to send the latest ephemeris to the terminal device. Therefore, the terminal device needs to initiate an ephemeris update.
- the ephemeris update indication information can be carried in the initial registration request.
- the fourth situation the terminal device is in the idle state, and the validity period of the ephemeris in the terminal device is about to expire.
- the terminal device In order to prevent the idle state from expiring, the terminal device actively initiates an ephemeris update at this time. At this time, the terminal device can send the ephemeris update indication information through the initial NAS message or other uplink signaling.
- the terminal device may send the ephemeris update indication information, and should not cause any limitation to this application.
- the terminal device may also send the ephemeris update instruction information to the core network element in other situations.
- the embodiments of the application are not limited here.
- the uplink NAS message sent by the terminal device to the first network element may not include the above-mentioned ephemeris update indication:
- the first scenario the uplink NAS message itself contains the purpose of requesting the network to send the latest ephemeris to the terminal device.
- the second scenario the initial NAS message sent by the terminal device from the idle state to the connected state.
- the first network element is configured in advance to provide the latest ephemeris data to the terminal device in this scenario. Provide the latest ephemeris data, such as the initial registration of the terminal device to the network, etc.
- the third scenario the scenario of the terminal device under mobile registration.
- the first network element provides the latest ephemeris data to the terminal because it is configured in advance to provide the latest ephemeris data to the terminal device in this scenario data.
- the fourth scenario other scenarios that may cause difficulties for the terminal device to search the network next time, etc.
- the first network element After the first network element receives the ephemeris update instruction information, it can determine whether the ephemeris in the terminal device needs to be updated according to the ephemeris update instruction information.
- the terminal device sends the ephemeris update instruction information to the first network element, and the first network element (for example, AMF) determines whether the ephemeris has changed accordingly.
- the first network element does not need to actively track the change of the ephemeris, which reduces the overhead and burden of the first network element.
- the terminal device can use the connected state to obtain the latest ephemeris in time.
- the first network element does not need to send the ephemeris update indication information, which can reduce signaling consumption.
- the ephemeris update indication information includes one or more satellite identities and/or one or more orbit identities.
- a satellite ID is used to uniquely identify a satellite
- an orbit ID is used to uniquely identify an orbit.
- the first satellite may include one or more satellites.
- the first satellite serving the terminal device includes one or more of the satellite currently serving the terminal device or the satellite that will serve the terminal device.
- the satellite identifier includes the identifier of the first satellite serving the terminal device
- the orbit identifier includes the identifier of the orbit where the first satellite is located
- the orbit where the first satellite is located may be one or more orbits.
- the ephemeris may include: the ephemeris of the satellites identified by one or more satellite identifiers, and/or the ephemeris of all the satellites in the orbits identified by the one or more orbit identifiers.
- the ephemeris may be the ephemeris of the entire satellite system.
- the ephemeris of the first satellite can be understood as: the ephemeris of all satellites in one or more orbits; or, it can also be understood as: the ephemeris of one or more satellites; or , Can also be understood as: the ephemeris of the entire satellite system. In other words, the ephemeris of the first satellite can be a whole.
- the ephemeris of the first satellite may also be referred to as the ephemeris stored in the terminal device. Therefore, the satellite identification in the ephemeris update indication information may include one satellite identification or multiple satellite identifications. Since the satellite currently serving the terminal device and/or the satellite that will serve the terminal device may exist on one or more orbits, the orbit identifier in the ephemeris update indication information may include one orbit identifier or multiple orbit identifiers.
- the ephemeris update indication information further includes at least one of the accuracy of the ephemeris change, the validity period of the ephemeris, or the reference time of the ephemeris.
- the accuracy of the ephemeris change indicates the accuracy requirements of the terminal device for the ephemeris change
- the validity period of the ephemeris includes the validity period of the ephemeris stored in the terminal device
- the reference time of the ephemeris includes the ephemeris stored in the terminal device. The time when the calendar began to be used.
- the ephemeris stored in the terminal device can be understood as: the ephemeris of all satellites in one or more orbits; or, it can also be understood as: the ephemeris of one or more satellites; or, it can also be understood as: The ephemeris of the entire satellite system.
- the accuracy of ephemeris changes can include the following:
- the type of precision such as high precision, medium precision, low precision, etc.
- accuracy type it may be pre-defined by the protocol or there may be an agreement between the terminal device and the first network element (for example, AMF) regarding the change range of each parameter in the ephemeris.
- the overall accuracy range value for example: only one change range value (such as a percentage) is used to represent the accuracy of the ephemeris. In other words: if any parameter in the old ephemeris changes beyond the accuracy range value, it means that the old ephemeris no longer meets the accuracy requirements.
- the old ephemeris can be understood as stored in the terminal device. The ephemeris of the satellite.
- the accuracy range value of one or more parameters for example: the variation range of the inclination angle does not exceed 1 degree, the variation range of the ascending node right ascension does not exceed 1.5 degrees, and so on.
- the accuracy range value of only one parameter in the ephemeris may be provided, or the accuracy range value of multiple parameters or all parameters may be provided.
- the validity period of the ephemeris can be a period of time starting from the reference time, for example, valid within one day from the reference time; it can also be a valid deadline for the ephemeris, for example, valid before January 1, 2021 ; Or it can be embodied in other ways.
- the embodiments of the application are not limited here.
- the reference time of the ephemeris may also be another specific reference time point related to the ephemeris, for example, it may be the time when the ephemeris was received or configured last time.
- the embodiments of the application are not limited here.
- the first network element may determine whether the ephemeris in the terminal device needs to be updated according to the ephemeris update indication information.
- the first network element determines the reference time of the ephemeris After that, it is determined that the time of starting to use the ephemeris in the terminal device has changed, and it is determined that the ephemeris in the terminal device needs to be updated. In other words, if the reference time of the updated ephemeris and the reference time of the ephemeris in the terminal device are greater than or equal to a preset or predefined threshold, it is determined that the ephemeris in the terminal device needs to be updated.
- the first network element determines whether the related orbit and/or the ephemeris of the satellite have changed.
- the relevant orbit here may be the orbit identified by the orbit identifier included in the ephemeris update indication information.
- the relevant satellite may be a satellite identified by a satellite identifier included in the ephemeris update indication information. If the ephemeris has changed, the first information includes the latest ephemeris information. If the ephemeris has not changed, the first message indicates that the ephemeris has not changed. Or, if the ephemeris of some orbits or satellites has changed, and some have not changed, the first information includes the changed part of the ephemeris information, and may include an indication of the unchanged part.
- the first network element can use the following methods Obtain orbit identification and/or satellite identification:
- the first way the terminal device provides one or more of the orbit identification or the satellite identification;
- the second way the first network element (for example, AMF) is based on one or more of the orbit identification or the satellite identification provided by the terminal device , And the location or mobile model of the terminal equipment, add additional orbit identification and/or satellite identification on the basis of the orbit identification and/or satellite identification provided by the terminal device;
- the third method if the terminal device does not provide the orbit identification And satellite identification, the first network element (for example, AMF) determines the orbit identification and/or satellite identification to be queried based on the location or movement model of the terminal device;
- the fourth method the first network element (for example, AMF) Based on other possible sources, such as operator configuration, other network elements, etc., determine the orbit identification and/or satellite identification that need to be queried.
- the satellite identifier includes the identifier of the first satellite currently serving the terminal device or is likely to serve the terminal device in the future
- the orbit identifier includes the orbit of the first satellite currently serving the terminal device or likely to serve the terminal device in the future.
- the first information includes the changed part of the ephemeris information, and may include an indication of the part of the ephemeris that has not changed.
- the ephemeris update indication information includes one or more of satellite identification or orbit identification, and includes the accuracy of the ephemeris change
- the first network element determines the ephemeris change If the degree is greater than or equal to a preset or predefined threshold, it is determined that the ephemeris in the terminal device needs to be updated. For example, if the value of a parameter in the ephemeris changes by the amount of 2, and the accuracy requirement of the ephemeris change is 1, the ephemeris needs to be changed.
- the difference (or difference) between the updated ephemeris and the ephemeris in the terminal device meets the accuracy requirement of the terminal device for changing the ephemeris
- the first information includes the updated ephemeris.
- the first network element may determine the ephemeris in the current terminal device according to locally stored information.
- the first network element determines that the terminal device is If the ephemeris has exceeded the validity period, it is determined that the ephemeris in the terminal device needs to be updated.
- the ephemeris update indication information does not include one or more of: satellite identification, orbit identification, ephemeris change accuracy, ephemeris validity period, or ephemeris reference time, then After receiving the ephemeris update instruction information, a network element determines that the current latest ephemeris has changed from the ephemeris last sent to the terminal device according to the locally stored information, and then sends the latest ephemeris to the terminal device. calendar. If the ephemeris update indication information does not include satellite identification and/or orbit identification, the satellite and/or orbit involved in the ephemeris may be determined by the first network element according to the position information or movement model of the terminal device.
- the first information includes the latest ephemeris information, and may be based on the ephemeris change.
- the regularity and/or accuracy provides the validity period of the latest ephemeris.
- the first information includes the indication information indicating that the ephemeris has changed but the accuracy still meets the requirements, and may be based on the law and/or accuracy of the ephemeris change
- the information provides the validity period of the old ephemeris (the old ephemeris can be understood as the ephemeris of the satellite currently serving the terminal equipment), and may also provide a new ephemeris and its validity period. If the ephemeris has changed, and the magnitude of the change does not exceed the accuracy requirements, the first information may include the above-mentioned information as well as the reference time of the old ephemeris.
- the reference time of the old ephemeris may be included in the latest star. In the calendar, it can also be provided independently of the latest ephemeris. If the ephemeris has not changed, the first information includes information indicating that the ephemeris has not changed, and may also include the validity period after the old ephemeris has been updated.
- the first network element may also determine whether the ephemeris has changed through other implementation manners. For example, after the first network element receives the ephemeris change instruction information, it considers that the terminal device determines that the ephemeris has been changed before sending it an ephemeris update instruction, so it is determined that the ephemeris update instruction information is received as long as the ephemeris update instruction information is received. Change, so as to send the latest ephemeris directly to the terminal device after receiving the ephemeris change instruction.
- the embodiments of the application are not limited here.
- the first network element determines whether the ephemeris in the terminal device needs to be updated according to the ephemeris update indication information, which can improve the accuracy of ephemeris update and avoid unnecessary ephemeris update.
- FIG. 5 is a schematic flowchart of a method for updating satellite ephemeris in some embodiments of the present application.
- S210 in the method 200 includes: S211 , S212 and S213.
- the first network element sends a first request to the second network element, where the first request is used to request the updated ephemeris.
- the first request may be included as a new information element in the current message type, may also be a new message type, or be in another form.
- the embodiment of the present application does not limit the form in which the first request exists.
- the second network element determines whether the ephemeris of the satellite has changed according to the first request.
- the second network element sends first information to the first network element, where the first information includes: updated ephemeris or indication information that the ephemeris has not changed.
- the first information may be included in the current message type as a new information element, or it may be a new message type, or in another form. The embodiment of the present application does not limit the existence form of the first information.
- step S220 shown in FIG. 5 reference may be made to the above-mentioned related description of S220. For the sake of brevity, it will not be repeated here.
- the first network element may also send a first request to the second network element, where the first request is used to request the updated ephemeris.
- the second network element is a satellite access network device (for example, SATRAN), an application function network element (for example, AF), or other core network network elements.
- the first network element may be an access and mobility management network element (for example, AMF), a capability opening network element (for example, NEF), or another core network element.
- the first request may be an ephemeris query request or subscription information for ephemeris change.
- the second network element can determine whether the ephemeris has changed.
- the second network element sends first information to the first network element, and the first information includes the updated ephemeris or the indication information that the ephemeris has not changed.
- the network side can obtain the latest ephemeris in time without waiting for the request of the terminal device.
- the terminal device can obtain the updated ephemeris in a timely and effective manner, improve the accuracy of the orbit or the position of the satellite predicted by the terminal device, and reduce the time delay for the terminal device to access the satellite cell, thereby improving communication efficiency and user experience.
- the method shown in FIG. 4 may also include S211, S212, and S213.
- the first request includes one or more of a satellite identification or an orbit identification, wherein the satellite identification includes an identification of the first satellite serving the terminal device, and the orbit identification includes the first satellite serving the terminal device.
- the first satellite may include one or more satellites.
- the first satellite serving the terminal device includes the satellite currently serving the terminal device and/or the satellite serving the terminal device soon.
- the satellite identifier includes the identifier of the first satellite
- the orbit identifier includes the identifier of the orbit where the first satellite is located.
- the orbit where the first satellite is located may be one or more orbits.
- orbit identification and/or satellite identification in the first request may originate from the following scenarios:
- the first scenario the terminal device provides orbit identification and/or satellite identification
- the second scenario the first network element (for example, AMF) is based on the orbit identification and/or satellite identification provided by the terminal device, and the location or location of the terminal device For mobile models, etc., additional orbit identification and/or satellite identification are added to the orbit identification and/or satellite identification provided by the terminal device
- the third scenario if the terminal device does not provide the orbit identification and satellite identification, the first network The element (for example, AMF) determines the orbit identification and/or satellite identification to be queried based on the location or movement model of the terminal device
- the fourth scenario the first network element (for example, AMF) is based on other possible sources, such as operators Configuration, other network elements, etc., determine the orbit identification and/or satellite identification that need to be queried.
- the first request may further include: at least one of the accuracy of the ephemeris change, the validity period of the ephemeris, or the reference time of the ephemeris.
- the accuracy of the ephemeris change indicates the accuracy requirements of the terminal device for the ephemeris change
- the validity period of the ephemeris includes the validity period of the ephemeris stored in the terminal device
- the reference time of the ephemeris includes the ephemeris stored in the terminal device. The time when the calendar began to be used.
- the specific process for the second network element to determine whether the ephemeris of the satellite has changed according to the first request may refer to the above-mentioned step S220.
- the first network element may determine the satellite in the terminal device according to the ephemeris update indication information. The description of whether the calendar needs to be updated is not repeated here for the sake of brevity.
- the second network element determines that the difference between the updated ephemeris and the pre-updated ephemeris meets the accuracy requirement according to the accuracy of the ephemeris change and the updated ephemeris.
- the second network element determines that the ephemeris of the first satellite has exceeded the validity period according to the validity period of the ephemeris and the updated ephemeris.
- the second network element determines that the time to start using the ephemeris of the first satellite has changed according to the reference time of the ephemeris and the updated ephemeris.
- the first request does not include one or more of satellite identification, orbit identification, accuracy of ephemeris change, ephemeris validity period, or ephemeris reference time.
- the second network element receives the first request After that, it is determined that the ephemeris needs to be updated according to the locally stored information, and the latest satellite ephemeris is sent to the first network element.
- the second network element after receiving the first request, directly sends the latest satellite ephemeris to the first network element.
- the satellite access network device can also determine one or more of the satellite identification or the orbit identification according to one or more of the location information or the movement model of the terminal device.
- the satellite identifier includes the identifier of the first satellite serving the terminal device
- the orbit identifier includes the identifier of the orbit where the first satellite is located. Further, according to the satellite identification or orbit identification, the latest ephemeris of the first satellite serving the terminal device is determined.
- the updated ephemeris includes the latest ephemeris of the first satellite serving the terminal device
- the satellite identifier includes the identifier of the first satellite serving the terminal device
- the orbit identifier includes the location of the first satellite serving the terminal device. The identity of the track.
- the first network element sends ephemeris change subscription information to the second network element (take SATRAN as an example)
- SAT RAN can provide AMF with the orbit or satellite information where SAT RAN is located.
- the orbit and/or satellite where SAT RAN is located can be understood as the current orbit or satellite information of SAT RAN, and it can also include other orbits saved by SAT RAN. Or one or more of the satellite information.
- the AMF can send the ephemeris change subscription information to the SAT RAN.
- the ephemeris change subscription information includes: one or more orbit identifications in the orbits provided by the SAT RAN, and/or one of the satellites provided by the SAT RAN Or the identification of multiple satellites. This can prevent the SAT RAN from sending the updated ephemeris of all satellites to the AMF, but only needs to send the updated ephemeris of the satellites subscribed by the AMF to the AMF, which can reduce the signaling overhead.
- the AMF may subscribe to the SAT RAN to change the ephemeris in the following two scenarios:
- the first scenario the terminal equipment accesses the network through satellites.
- the AMF needs to track the orbit of the service terminal equipment and/or the satellites of the satellites. Changes in the calendar.
- the orbit and/or satellite information included in the ephemeris change subscription information is one or more of the orbit or satellite information of the service terminal device.
- the ephemeris change subscription information may also include neighbor orbits and/or neighbor satellite information of the serving terminal device.
- the second scenario The orbit and/or satellite information provided by SAT RAN to AMF is different from the orbit and/or satellite of the terminal equipment managed by the service AMF.
- AMF may also subscribe to the orbit and/or satellite provided by SAT RAN Changes in the ephemeris.
- the AMF only subscribes the ephemeris change to one SAT RAN.
- FIG. 6 is a schematic flow chart of a method 300 for updating satellite ephemeris according to an embodiment of the present application. picture. As shown in FIG. 6, the method 300 shown in FIG. 6 may include S310 to S320.
- S310 The second network element determines whether the ephemeris of the satellite has changed.
- the second network element sends first information to the first network element, where the first information includes: the updated ephemeris or information indicating that the ephemeris has not changed.
- the first information may be included in the current message type as a new information element, or it may be a new message type, or in another form. The embodiment of the present application does not limit the existence form of the first information.
- the second network element determines whether the ephemeris of the satellite has changed, and the ephemeris may include the ephemeris of the current serving terminal device and/or the satellite that will serve the terminal device.
- the ephemeris may include: the ephemeris of one or more satellites, and/or the ephemeris of all satellites in one or more orbits, or the ephemeris may also be a whole. It even includes the ephemeris of the entire satellite system.
- the ephemeris may include a satellite-level ephemeris and/or an orbit-level ephemeris.
- the ephemeris in the terminal device can also be understood as the ephemeris stored in the terminal device.
- the second network element may be a satellite access network device (for example, SATRAN), an application function network element (for example, AF), or other core network network elements.
- the first network element may be an access and mobility management network element (for example, AMF), a capability opening network element (for example, NEF), or another core network element.
- the second network element determines whether the ephemeris of the satellite has changed.
- the second network element may determine whether the ephemeris has been changed according to the parameters included in the locally stored ephemeris, such as the accuracy of the ephemeris change, the reference time of the ephemeris, the validity period of the ephemeris, etc., for example, the accuracy of the ephemeris If the change exceeds the requirement, the accuracy of the ephemeris cannot meet the requirements, the validity period of the ephemeris has expired, or the reference time of the ephemeris has changed, it is determined whether the ephemeris of the satellite has changed.
- the parameters included in the locally stored ephemeris such as the accuracy of the ephemeris change, the reference time of the ephemeris, the validity period of the ephemeris, etc.
- the second network element may also determine whether the ephemeris has changed based on other information. For example, as long as there is any change in the ephemeris information in the second network element, it is determined that the ephemeris has changed, and the latest ephemeris is sent to the first network element. Network element.
- the embodiment of this application does not limit the process by which the second network element determines whether the ephemeris has changed.
- the second network element After determining whether the ephemeris has changed, in S320, the second network element sends first information to the first network element.
- the first information includes: the updated ephemeris or information indicating that the ephemeris has not changed.
- the updated ephemeris includes: the ephemeris of the first satellite of the service terminal device, and the indication information that the ephemeris has not changed may be the indication information that the ephemeris of the first satellite of the service terminal device has not changed.
- the first satellite serving the terminal device may include one or more satellites, for example, a satellite that currently serves the terminal device and/or a satellite that will serve the terminal device.
- the satellite identifier includes the identifier of the first satellite serving the terminal device
- the orbit identifier includes the identifier of the orbit where the first satellite is located
- the orbit where the first satellite is located may be one or more orbits. Therefore, in this embodiment of the present application, the ephemeris may include: the ephemeris of the satellites identified by one or more satellite identifiers, and/or the ephemeris of all the satellites in the orbits identified by the one or more orbit identifiers. Alternatively, the ephemeris may be the ephemeris of the entire satellite system.
- the ephemeris of the first satellite can be understood as: the ephemeris of all satellites in one or more orbits; or, it can also be understood as: the ephemeris of one or more satellites; or , Can also be understood as: the ephemeris of the entire satellite system.
- the ephemeris of the first satellite can be a whole.
- the ephemeris of the first satellite may also be referred to as the ephemeris stored in the terminal device.
- the first information may be notified to the terminal device through a downlink NAS message or other signaling, or the first network element may send the first information after the ephemeris update instruction information is sent.
- the information is sent to the terminal device. If the first information includes the updated ephemeris, the terminal device can search for satellites according to the updated ephemeris and access the satellite cell. If the first information includes information indicating that the ephemeris has not changed, the first terminal device can continue to use the previous ephemeris to search for satellites and access the satellite cell.
- the first network element for example, AMF
- receives the first information ephemeris data
- the AMF has not sent the second
- the network element for example, SAT RAN
- the AMF may not send the indication information that the ephemeris has not changed to the terminal device.
- the AMF may not send the indication information that the ephemeris has not changed to the terminal device, and the terminal device has not received it. If the indication information that the ephemeris has not changed or the updated ephemeris sent by the AMF, the default ephemeris has not changed, and the first terminal device can continue to use the previous ephemeris to search for satellites and access the satellite cell.
- the network side can timely obtain whether the ephemeris has changed. If the ephemeris has been changed, the network side can obtain the latest ephemeris after the change in time, and update the ephemeris in time The information is notified to the terminal equipment, which can enable the terminal equipment to obtain the updated ephemeris in a timely and effective manner, improve the accuracy of the orbit or satellite position predicted by the terminal equipment, and reduce the time delay for the terminal equipment to access the satellite cell, thereby improving the communication efficiency and user experience.
- FIG. 7 is a schematic flowchart of a method for updating satellite ephemeris in some embodiments of the present application.
- the method 300 further includes : S309.
- the second network element receives a first request from the first network element, that is, the first network element sends a first request to the second network element, and the first request is used to request updated ephemeris information.
- the first request may be included as a new information element in the current message type, may also be a new message type, or be in another form. The embodiment of the present application does not limit the form in which the first request exists.
- S310 may include S311.
- the second network element determines that the updated ephemeris or the ephemeris has not changed.
- step S320 shown in FIG. 7 reference may be made to the above-mentioned related description of S320. For the sake of brevity, it will not be repeated here.
- the first network element may send a first request to the second network element, where the first request is used to request the updated ephemeris information.
- the first request may be an ephemeris query request or subscription information for ephemeris change.
- the second network element determines that the updated ephemeris or the ephemeris has not changed according to the first request.
- the first request includes one or more of a satellite identification or an orbit identification, wherein the satellite identification includes an identification of the first satellite serving the terminal device, and the orbit identification includes an identification of the orbit where the first satellite is served. .
- the first request further includes: at least one of the accuracy of the ephemeris change, the validity period of the ephemeris, or the reference time of the ephemeris.
- the accuracy of the ephemeris change indicates the accuracy requirements of the terminal device for the ephemeris change
- the validity period of the ephemeris includes the validity period of the ephemeris stored in the terminal device
- the reference time of the ephemeris includes the ephemeris stored in the terminal device. The time when the calendar began to be used.
- the ephemeris stored in the terminal device can be understood as: the ephemeris of all satellites in one or more orbits; or, it can also be understood as: the ephemeris of one or more satellites; or, it can also be understood as: The ephemeris of the entire satellite system. In other words, the ephemeris stored in the terminal device can be a whole.
- the second network element determines that the updated ephemeris or the ephemeris has not changed according to the first request.
- the first request includes the accuracy of the ephemeris change
- the second network element may determine the updated ephemeris and the ephemeris according to the accuracy of the ephemeris change and the updated ephemeris. The difference between the ephemeris before the update meets the accuracy requirement.
- the first request includes the validity period of the ephemeris
- the second network element may determine the ephemeris of the first satellite according to the validity period of the ephemeris and the updated ephemeris The validity period has expired.
- the first request includes the reference time of the ephemeris
- the second network element determines to start using the first satellite based on the reference time of the ephemeris and the updated ephemeris. The time of the ephemeris has changed.
- the first request does not include one or more of: satellite identification, orbit identification, ephemeris change accuracy, ephemeris validity period, or ephemeris reference time, then the first request The second network element determines that the ephemeris needs to be updated according to the locally stored information, and sends the latest satellite ephemeris to the first network element.
- the second network element after receiving the first request, directly sends the latest satellite ephemeris to the first network element.
- the specific process for the second network element to determine whether the ephemeris of the satellite has changed according to the first request may refer to the related description of the above method 200, which is not repeated here for brevity.
- the satellite access network device may also be based on the location information or location information of the terminal device corresponding to the satellite’s ephemeris.
- One or more of the mobile models determine the latest ephemeris of the first satellite serving the terminal device.
- the updated ephemeris includes the latest ephemeris of the first satellite serving the terminal device, wherein the satellite identifier includes the identifier of the first satellite serving the terminal device, and the orbit identifier includes the first satellite serving the terminal device. The identification of the satellite's orbit.
- the network side can timely obtain whether the ephemeris has changed. If the ephemeris has been changed, the network side can obtain the latest ephemeris after the change in time, and update the ephemeris in time The information is notified to the terminal device, so that the terminal device can obtain the updated ephemeris in a timely and effective manner.
- Fig. 8 shows a schematic interaction diagram of an example of an ephemeris update method. As shown in FIG. 8, the method 400 includes:
- S401 Register the AF ephemeris update event in the NEF in advance through a certain method, such as operation, management, and maintenance (Operation Administration and Maintenance, OAM) configuration.
- the registration information includes one or more of an AF identifier, an AF service identifier, orbit information, or satellite information.
- the NEF sends a network element update request message to the NRF, where the network element update request message is used to update its registration information in the NRF, that is, the NEF profile.
- the network element update request message includes the identifier of the ephemeris update event. Optionally, it may also include one or more of orbit information, satellite information, related AF identification, or application identification.
- the NRF stores the configuration of the NEF.
- the NRF sends a network element update response to the NEF to confirm that the configuration of the NEF has been updated.
- the AMF determines that the ephemeris change event needs to be subscribed, and sends a network element discovery request to the NRF.
- the network element discovery request is used to discover a suitable NEF that can be used to subscribe to the ephemeris update event.
- the network element discovery request includes the network element type, namely NEF.
- the network element discovery request may also include one or more of the ephemeris update event identifier, orbit information, satellite information, accuracy information, reference time of the old ephemeris, related AF identifier, or application identifier. indivual.
- the NRF matches the parameter information provided by the AMF, and sends a network element discovery response to the AMF.
- the network element discovery response includes NEF information, such as the identifier of the NEF instance, the address of the NEF instance, and so on.
- the AMF sends an ephemeris update event subscription message to the NEF, where the message is used for the AMF to subscribe to the NEF for the ephemeris update event.
- the message includes one or more of the ephemeris update event identifier, orbit information, satellite information, the identifier of the related AF, or the identifier of the application. If the NEF authorization is successful, the trigger of the ephemeris change event is associated with the AMF identity.
- the NEF Based on the request of the AMF, the NEF sends an ephemeris update event subscription message to the AF, and the message is used for the NEF to subscribe to the AF for the ephemeris change event.
- the AF sends an ephemeris update event notification message to the NEF, and the message contains the latest ephemeris data.
- AF may consider the accuracy information provided by AMF and the reference time of the old ephemeris when determining whether the ephemeris has changed. For example: if the degree of change in the ephemeris meets the accuracy requirements, it may be determined that the result of the change in the ephemeris is unchanged. It should be understood that the ephemeris change here may be a plan change, that is, no change has actually occurred. At this time, the ephemeris data is sent at the same time as the changed plan time point.
- the AF notification message may also include: the validity period of the latest ephemeris data and other parameters related to the ephemeris.
- the NEF sends an ephemeris update event notification message to the AMF.
- the ephemeris update event notification message may include: the latest ephemeris or information indicating that the ephemeris has not changed.
- the notification message may also include the validity period of the ephemeris.
- S411 The terminal device sends uplink NAS information to the AMF, where the uplink NAS information is used to instruct to update the ephemeris in the terminal device. It should be understood that S411 is an optional step.
- the AMF sends ephemeris update instruction information to the terminal device, where the ephemeris update instruction information includes: updated ephemeris or indication information that the ephemeris has not changed.
- the ephemeris update indication information may be carried by downlink NAS information or other signaling.
- the core network side can obtain the ephemeris update information in time and send it to the terminal device.
- pre-set and pre-defined can be achieved by pre-saving corresponding codes, tables, or other methods that can be used to indicate related information in devices (for example, including terminals and network devices). To achieve, this application does not limit its specific implementation.
- FIG. 9 shows a schematic block diagram of a communication device 500 according to an embodiment of the present application.
- the device 300 may correspond to the first network element described in the above method 200, or may be a chip or component applied to the first network element, and Each module or unit in the device 500 is used to execute the above-mentioned method 200, method 300, method 400, and various actions or processes performed by the first network element (for example, AMF) in FIG. 3 to FIG. 7 and FIG. 8 respectively.
- AMF first network element
- the device 500 includes a processing unit 510 and a transceiver unit 520.
- the transceiving unit 520 is configured to perform specific signal transceiving under the driving of the processing unit 510.
- the processing unit 510 is configured to determine whether the ephemeris in the terminal device needs to be updated
- the transceiver unit 520 is configured to send first information to the terminal device, where the first information includes: updated ephemeris or indication information that the ephemeris has not changed.
- the communication device provided in this application can notify the terminal equipment of the update of the ephemeris. If the ephemeris has been changed, the communication device (or core network element) can obtain the latest ephemeris in time, without waiting for the request of the terminal device, so that the terminal device can obtain the updated ephemeris in a timely and effective manner.
- the accuracy of the orbit or the position of the satellite predicted by the terminal equipment reduces the time delay for the terminal equipment to access the satellite cell, thereby improving communication efficiency and user experience.
- the transceiver unit 520 is further configured to receive ephemeris update indication information from the terminal device, where the ephemeris update indication information is used to instruct to update the ephemeris in the terminal device .
- the ephemeris update indication information includes one or more of a satellite identification or an orbit identification
- the satellite identification includes an identification of the first satellite serving the terminal device
- the orbit identification Including the identification of the orbit of the first satellite.
- the ephemeris update indication information further includes: at least one of the accuracy of the ephemeris change, the validity period of the ephemeris, or the reference time of the ephemeris,
- the accuracy of the ephemeris change indicates the accuracy requirement of the terminal device for the ephemeris change
- the validity period of the ephemeris includes the ephemeris validity period of the first satellite
- the reference time of the ephemeris includes the ephemeris start of the first satellite The time used.
- the transceiver unit 520 is further configured to:
- the first request includes one or more of a satellite identification or an orbit identification, where the satellite identification includes an identification of the first satellite serving the terminal device, and the orbit The identification includes the identification of the orbit of the first satellite serving the terminal device.
- the processing unit 510 is further configured to determine whether the ephemeris in the terminal device needs to be updated according to the ephemeris update indication information.
- the processing unit 510 is further configured to determine the updated ephemeris and the terminal device according to the accuracy of the ephemeris change of the terminal device and the updated ephemeris The difference between the ephemeris meets the accuracy requirement of the terminal device for the ephemeris change, and the accuracy of the ephemeris change indicates the accuracy requirement of the terminal device for the ephemeris change.
- the processing unit 510 is further configured to determine that the ephemeris in the terminal device has exceeded the validity period according to the validity period of the ephemeris of the terminal device and the updated ephemeris.
- the validity period of the ephemeris includes the validity period of the ephemeris of the first satellite serving the terminal device.
- the processing unit 510 is further configured to determine the time to start using the ephemeris in the terminal device according to the reference time of the ephemeris of the terminal device and the updated ephemeris A change has occurred, and the reference time of the ephemeris includes the time when the ephemeris of the first satellite serving the terminal device starts to be used.
- the processing unit 510 is further configured to determine a satellite identification or an orbit identification according to one or more of the location information or movement model of the terminal device, where the satellite identification includes The identifier of the first satellite serving the terminal device, and the orbit identifier includes the identifier of the orbit where the first satellite serving the terminal device is located.
- the communication device is an access and mobility management network element.
- the second network element is a satellite access network device, an application function network element, or a core network network element.
- the ephemeris includes one or more of satellite-level parameters or orbital plane parameters.
- the device 500 may also be the storage unit, and the transceiving unit 520 may be a transceiver, an input/output interface, or an interface circuit.
- the storage unit is used to store instructions executed by the transceiver unit 520 and the processing unit 510.
- the transceiving unit 520, the processing unit 510, and the storage unit are coupled to each other, the storage unit stores instructions, the processing unit 510 is used to execute the instructions stored in the storage unit, and the transceiving unit 520 is used to perform specific signal transceiving under the driving of the processing unit 510.
- the transceiving unit 520 may include a receiving unit (module) and a sending unit (module), configured to execute the foregoing method 200, method 300, method 400, and the embodiments shown in FIGS. 3 to 7 and 8 The steps of the first network element (for example, AMF) receiving information and sending information.
- a receiving unit module
- a sending unit module
- the transceiving unit 520 may be a transceiver, an input/output interface, or an interface circuit.
- the storage unit may be a memory.
- the processing unit 510 may be implemented by a processor.
- the communication device 600 may include a processor 610, a memory 620, and a transceiver 630.
- the various components of the communication device 600 may be coupled together through, for example, a bus system or the like.
- the communication device 500 shown in FIG. 9 or the communication device 600 shown in FIG. 10 can implement the foregoing method 200, method 300, method 400, and the first network element (such as AMF ) The steps performed.
- the first network element such as AMF
- the communication device 500 shown in FIG. 9 or the communication device 600 shown in FIG. 10 may be a core network device, for example, it may be an AMF, or an SMF, or other core network devices.
- AMF Access Management Function
- SMF Session Management Function
- FIG. 11 shows a schematic block diagram of a communication device 700 according to an embodiment of the present application.
- the device 700 may correspond to the foregoing method 200, method 300, and the second network element described in FIG. 5 to FIG. Chips or components of two network elements, and each module or unit in the device 700 is used to execute each action or process performed by the second network element in the above method 200 and method 300, respectively.
- the apparatus 700 may include a processing unit 710 and a transceiver unit 720.
- the transceiving unit 720 is configured to perform specific signal transceiving under the driving of the processing unit 710.
- the processing unit 710 is configured to determine whether the ephemeris of the satellite has changed
- the transceiver unit 720 is configured to send first information to the first network element, where the first information includes: updated ephemeris or indication information indicating that the ephemeris has not changed.
- the second network element can obtain whether the ephemeris has changed in time. If the ephemeris has changed, the network side can obtain the latest ephemeris after the change in time, and can timely update the ephemeris.
- the change information of the ephemeris is notified to the terminal equipment, so that the terminal equipment can obtain the updated ephemeris in a timely and effective manner, improve the accuracy of the orbit or satellite position predicted by the terminal equipment, and reduce the time delay for the terminal equipment to access the satellite cell, thereby increasing Communication efficiency and user experience.
- the transceiver unit 720 is further configured to receive a first request from the first network element, where the first request is used to request the updated ephemeris information;
- the processing unit 710 is further configured to determine, according to the first request, that the updated ephemeris or ephemeris has not changed.
- the first request includes one or more of a satellite identification or an orbit identification, wherein the satellite identification includes an identification of the first satellite serving the terminal device, and the orbit identification includes Serving the identification of the orbit of the first satellite.
- the first request further includes: at least one of the accuracy of the ephemeris change, the validity period of the ephemeris, or the reference time of the ephemeris,
- the accuracy of the ephemeris change indicates the accuracy requirement of the terminal device for the ephemeris change
- the validity period of the ephemeris includes the ephemeris validity period of the first satellite
- the reference time of the ephemeris includes the ephemeris start of the first satellite The time used.
- the first request includes the accuracy of the ephemeris change
- the processing unit 710 is further configured to: determine the accuracy of the ephemeris change according to the accuracy of the ephemeris change and the updated ephemeris The difference between the updated ephemeris and the pre-updated ephemeris meets the accuracy requirement.
- the processing unit 710 is further configured to: determine the first ephemeris according to the validity period of the ephemeris and the updated ephemeris The ephemeris of the satellite has exceeded its validity period.
- the first request includes the reference time of the ephemeris
- the processing unit 710 is further configured to: determine the starting time according to the reference time of the ephemeris and the updated ephemeris. The time of using the ephemeris of the first satellite has changed.
- the second network element is a satellite access network device
- the processing unit 710 is further configured to: according to the location information or movement model of the terminal device corresponding to the ephemeris of the satellite Determine the latest ephemeris of the first satellite serving the terminal device, the updated ephemeris includes the latest ephemeris of the first satellite serving the terminal device, wherein the satellite identification includes the terminal device
- the identification of the first satellite in the orbit includes the identification of the orbit where the first satellite serving the terminal device is located.
- the first network element is an access and mobility management network or a capability opening network element.
- the communication device is an application function network element, a satellite access network device, or a core network network element.
- the ephemeris includes one or more of satellite-level parameters or orbital plane parameters.
- the transceiving unit 720 may include a receiving unit (module) and a sending unit (module), which are used to execute each embodiment of the aforementioned method 200 and method 300 and the second network in the embodiments shown in FIG. 5 to FIG. The steps of meta receiving and sending information.
- the device 700 can also be the storage unit.
- the transceiving unit 720 may be a transceiver, an input/output interface, or an interface circuit.
- the storage unit is used to store instructions executed by the transceiver unit 720 and the processing unit 710.
- the transceiving unit 720, the processing unit 710, and the storage unit are coupled to each other, the storage unit stores instructions, the processing unit 710 is used to execute the instructions stored in the storage unit, and the transceiving unit 720 is used to perform specific signal transceiving under the driving of the processing unit 710.
- the transceiving unit 720 may be a transceiver, an input/output interface, or an interface circuit.
- the storage unit may be a memory.
- the processing unit 710 may be implemented by a processor.
- the communication device 800 may include a processor 810, a memory 820, and a transceiver 830.
- the communication device 700 shown in FIG. 11 or the communication device 800 shown in FIG. 12 can implement various embodiments of the foregoing method 200 and method 300 and the steps performed by the second network element in the embodiments shown in FIG. 5 to FIG. 7.
- the communication device 700 shown in FIG. 11 or the communication device 800 shown in FIG. 12 may be satellite access network equipment (for example, SAT RAN), application function network elements (for example, AF), or other core network network elements. .
- SAT RAN satellite access network equipment
- application function network elements for example, AF
- core network network elements for example, AF
- the embodiments of the application are not limited here.
- each unit in the device can be all implemented in the form of software called by processing elements; they can also be all implemented in the form of hardware; part of the units can also be implemented in the form of software called by the processing elements, and some of the units can be implemented in the form of hardware.
- each unit can be a separate processing element, or it can be integrated in a certain chip of the device for implementation.
- it can also be stored in the memory in the form of a program, which is called and executed by a certain processing element of the device. Function.
- the processing element may also be called a processor, and may be an integrated circuit with signal processing capability.
- each step of the above method or each of the above units may be implemented by an integrated logic circuit of hardware in a processor element or implemented in a form of being called by software through a processing element.
- the unit in any of the above devices may be one or more integrated circuits configured to implement the above methods, for example: one or more application specific integrated circuits (ASIC), or, one or Multiple digital signal processors (digital signal processors, DSP), or, one or more field programmable gate arrays (FPGA), or a combination of at least two of these integrated circuits.
- ASIC application specific integrated circuits
- DSP digital signal processors
- FPGA field programmable gate arrays
- the unit in the device can be implemented in the form of a processing element scheduler
- the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call programs.
- CPU central processing unit
- these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
- FIG. 13 is a schematic structural diagram of a satellite access network device 900 provided by an embodiment of the application, which can be used to implement the function of the satellite access network device (for example, SAT RAN) in the foregoing method.
- the satellite access network equipment 900 includes one or more radio frequency units, such as a remote radio unit (RRU) 901 and one or more baseband units (BBU) (also referred to as digital units, digital units). , DU)902.
- RRU 901 may be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 9011 and a radio frequency unit 9012.
- the RRU 901 part is mainly used for the transmission and reception of radio frequency signals and the conversion between radio frequency signals and baseband signals, for example, for sending the signaling messages in the foregoing embodiments to the terminal device.
- the 902 part of the BBU is mainly used for baseband processing and control of the base station.
- the RRU 901 and the BBU 902 may be physically set together, or may be physically separated, that is, a distributed base station.
- the BBU 902 is the control center of the base station, and may also be called a processing unit, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading.
- the BBU (processing unit) 902 may be used to control the base station 90 to execute the operation procedure of the network device in the foregoing method embodiment.
- the BBU 902 can be composed of one or more single boards, and multiple single boards can jointly support a radio access network of a single access standard (such as an LTE system or a 5G system), and can also support different connections. Enter the standard wireless access network.
- the BBU 902 also includes a memory 9021 and a processor 9022.
- the memory 9021 is used to store necessary instructions and data.
- the memory 9021 stores the codebook in the above-mentioned embodiment and the like.
- the processor 9022 is used to control the base station to perform necessary actions, for example, used to control the base station to execute the operation procedure of the network device in the foregoing method embodiment.
- the memory 9021 and the processor 9022 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.
- SoC system-on-chip
- all or part of the functions of part 902 and part 901 can be implemented by SoC technology, for example, a base station function chip Realization, the base station function chip integrates a processor, a memory, an antenna interface and other devices, the program of the base station related functions is stored in the memory, and the processor executes the program to realize the relevant functions of the base station.
- the base station function chip can also read a memory external to the chip to implement related functions of the base station.
- FIG. 13 the structure of the satellite access network device illustrated in FIG. 13 is only a possible form, and should not constitute any limitation in the embodiment of the present application. This application does not exclude the possibility of other types of satellite access network equipment structures that may appear in the future.
- the satellite access network equipment can be understood as the unit or equipment of the base station function part on the satellite, and the related signaling and data processing of the access network are all performed on the satellite.
- the satellite access network equipment can be understood as the unit or equipment of the base station function part on the satellite, and the base station equipment on the ground, and the related signaling and data of the access network The processing takes place partly on the satellite and partly on the ground.
- the satellite access network equipment can be understood as the base station equipment on the ground.
- the related signaling and data processing of the access network are all carried out at the base station on the ground, and the satellite is transparently transmitted between the terminal equipment and the satellite access network equipment. Signaling and data.
- the processor may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), and dedicated integration Circuit (application specific integrated circuit, ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
- the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
- the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile 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), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
- the volatile memory may be random access memory (RAM), which is used as an external cache.
- RAM random access memory
- static random access memory static random access memory
- DRAM dynamic random access memory
- DRAM synchronous dynamic random access memory
- Access memory synchronous DRAM, SDRAM
- double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
- enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
- synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).
- the above-mentioned embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination.
- the above-mentioned embodiments may be implemented in the form of a computer program product in whole or in part.
- the computer program product includes one or more computer instructions or computer programs.
- the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
- the computer instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
- the computer instruction may be transmitted from a website, computer, server, or data center through a cable (For example, infrared, wireless, microwave, etc.) to transmit to another website, computer, server or data center.
- the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more sets of available media.
- the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium.
- the semiconductor medium may be a solid state drive.
- An embodiment of the present application also provides a communication system, which includes: the above-mentioned first network element, the second network element, and the above-mentioned terminal device.
- the embodiment of the present application also provides a computer-readable medium for storing computer program code.
- the computer program includes instructions for executing the satellite ephemeris update method in the foregoing method 200 to method 400 of the embodiment of the present application.
- the readable medium may be a read-only memory (ROM) or a random access memory (RAM), which is not limited in the embodiment of the present application.
- the computer program product includes instructions. When the instructions are executed, the first network element and the second network element respectively execute the first network element and the second network element corresponding to the above-mentioned method. Operation of network elements.
- An embodiment of the present application also provides a system chip, which includes a processing unit and a communication unit.
- the processing unit may be, for example, a processor, and the communication unit may be, for example, an input/output interface, a pin, or a circuit.
- the processing unit can execute computer instructions so that the chip in the communication device executes any of the satellite ephemeris update methods provided in the foregoing embodiments of the present application.
- any communication device provided in the foregoing embodiments of the present application may include the system chip.
- the computer instructions are stored in a storage unit.
- the storage unit is a storage unit in the chip, such as a register, a cache, etc.
- the storage unit can also be a storage unit in the terminal located outside the chip, such as a ROM or other storage units that can store static information and instructions.
- static storage devices RAM, etc.
- the processor mentioned in any of the above can be a CPU, a microprocessor, an ASIC, or one or more integrated circuits used to control the program execution of the satellite ephemeris update method.
- the processing unit and the storage unit can be decoupled, respectively set on different physical devices, and connected in a wired or wireless manner to realize the respective functions of the processing unit and the storage unit, so as to support the system chip to implement the above-mentioned embodiments Various functions in.
- the processing unit and the memory may also be coupled to the same device.
- the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile 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), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
- the volatile memory may be random access memory (RAM), which is used as an external cache.
- RAM random access memory
- static random access memory static random access memory
- DRAM dynamic random access memory
- DRAM synchronous dynamic random access memory
- Access memory synchronous DRAM, SDRAM
- double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
- enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
- synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).
- system and "network” in this article are often used interchangeably in this article.
- and/or in this article is only an association relationship describing the associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations.
- the character "/" in this text generally indicates that the associated objects before and after are in an "or” relationship.
- uplink and downlink appearing in this application are used to describe the direction of data/information transmission in a specific scenario.
- the "uplink” direction generally refers to the direction or distribution of data/information from the terminal to the network side.
- the “downlink” direction generally refers to the direction in which data/information is transmitted from the network side to the terminal, or the direction in which the centralized unit transmits to the distributed unit.
- uplink and downlink “It is only used to describe the direction of data/information transmission, and the specific start and end equipment of the data/information transmission is not limited.
- the disclosed system, device, and method can be implemented in other ways.
- the device embodiments described above are only illustrative.
- the division of the unit is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not implemented.
- the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
- the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
- the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
- the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
- the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), and random access.
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Abstract
本申请提供了一种卫星星历更新的方法和通信装置,该方法包括:第一网元确定终端设备中的星历是否需要更新;该第一网元向该终端设备发送第一信息,该第一信息包括:更新后的星历或者星历未发生变化的指示信息。可选的,第一网元可以为核心网网元。例如,第一网元可以为AMF,或者为SMF等。本申请提供的星历更新的方法,向终端设备及时的通知星历更新信息,可以使得终端设备及时和有效的获取更新后的星历,降低终端设备接入卫星小区的时延,从而提高通信效率和用户体验。
Description
本申请要求于2020年3月27日提交中国专利局、申请号为202010228291.5、申请名称为“卫星星历更新的方法和通信装置”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。
本申请涉及卫星通信领域,更为具体的,涉及一种卫星星历更新的方法和通信装置。
随着卫星技术逐渐成熟,卫星数量已达到数以千计。卫星数量的上升使得卫星覆盖的精度和广度等趋于完备,从而为卫星通信的广泛使用奠定了基础。
终端设备通过卫星进行通信的特点是波束的覆盖范围和倾角会不断的变化。终端设备成功接入卫星网络之前需要搜索可用的网络,由于卫星覆盖的卫星小区的可见天线角度相比地面小区窄的多,且卫星不断移动,这些都增加了终端设备通过搜索卫星网络接入到卫星小区的难度。如果终端设备没有卫星所在的位置信息,直接盲搜卫星小区,有可能会花费数小时才能成功搜索到网络,这严重影响了用户体验。通过提供给终端设备卫星的星历,终端设备搜网的效率可大幅提高。
随着时间的变化,服务终端设备的卫星的星历可能会发生变化。目前,存储于终端设备内部的星历的无法有效和及时的更新,会造成终端设备预测的轨道或卫星的位置的精度将下降,从而需要更长的时间才能成功接入卫星小区,增加了终端设备通信的时延,降低了通信效率和用户体验。
发明内容
本申请提供了一种卫星星历更新的方法和通信装置,向终端设备及时的通知星历更新信息,可以使得终端设备及时和有效的获取更新后的星历,降低终端设备接入卫星小区的时延,从而提高通信效率和用户体验。
第一方面,提供了一种卫星星历更新的方法,该方法包括:第一网元确定终端设备中的星历是否需要更新;该第一网元向该终端设备发送第一信息,该第一信息包括:更新后的星历或者星历未发生变化的指示信息。可选的,第一网元可以为核心网网元。例如,第一网元可以为AMF,或者为SMF等。
第一方面提供的一种卫星星历更新的方法,将星历更新的情况通知给终端设备。若星历已经发生了变更,核心网侧(或者核心网网元)能够及时的获取最新星历,不需要等待终端设备的请求,可以使得终端设备及时和有效的获取更新后的星历,提高终端设备预测的轨道或卫星的位置的精度,降低终端设备接入卫星小区的时延,从而提高通信效率和用户体验。
可选的,如果星历的变更依然满足终端设备对星历变更的精度的要求或者星历未发生变化,则第一网元可以不向终端设备发送星历未发生变化的指示信息,终端设备没有接收到AMF发送的星历未发生变化的指示信息或者更新后的星历,则默认星历未发生变化,则第一终端设备可以继续使用之前的星历搜索卫星并接入卫星小区。
在第一方面一种可能的实现方式中,该方法还包括:该第一网元接收来自于该终端设备的星历更新指示信息,该星历更新指示信息用于指示更新该终端设备中的星历。第一网元可以根据该星历更新指示信息,确定终端设备中的星历是否需要更新。在该实现方式中,终端设备向第一网元发送星历更新指示信息,第一网元(例如AMF)据此确定星历是否发生变化。第一网元不需要主动跟踪星历的变更,降低第一网元的开销和负担。并且,终端设备可以及时的获取最新的星历,在星历未变更或变更程度不大时,不需要第一网元发送星历更新指示信息,可以减少信令消耗。
可选的,星历更新指示信息可以承载在任意一种上行NAS消息中,或者承载在其它可能信令中。
可选的,终端设备发送给第一网元的上行NAS消息中可可以不包含星历更新指示。例如,该NAS消息本身可以用于请求网络将最新的星历发送给终端设备的目的。
在第一方面一种可能的实现方式中,该星历更新指示信息包括卫星标识或轨道标识中的一个或多个,该卫星标识包括服务该终端设备的第一卫星的标识,该轨道标识包括该第一卫星所在轨道的标识。应理解,第一卫星可以包括一个或者多个卫星。例如,服务该终端设备的第一卫星包括当前服务终端设备的卫星或即将服务终端设备的卫星中的一个或者多个。该卫星标识包括服务该终端设备的第一卫星的标识,该轨道标识包括该第一卫星所在轨道的标识,第一卫星所在的轨道可以为一个或者多个轨道。因此,星历可以包括:一个或者多个卫星标识所标识的卫星的星历,和/或,一个或者多个轨道标识所标识的轨道上所有卫星的星历。或者,星历可以为整个卫星系统的星历。第一卫星的星历也可以称为存储在终端设备中的星历。
在第一方面一种可能的实现方式中,该星历更新指示信息还包括:星历变更的精度、星历的有效期或者星历的参考时间中的至少一种,其中,该星历变更的精度指示该终端设备对于星历变更的精度要求,该星历的有效期包括该第一卫星的星历有效期,该星历的参考时间包括该第一卫星的星历开始使用的时间。或者,该星历的有效期包括存储在终端设备中的星历有效期,该星历的参考时间包括存储在终端设备中的星历开始使用的时间。在该实现方式中,第一网元根据该星历更新指示信息,确定该终端设备中的星历是否需要更新,可以提高星历更新的准确性,避免不必要的星历的更新。
可选的,星历的有效期可以是一个从参考时间开始的一个时间段长度,例如从参考时间开始的一天内有效;也可以是一个星历有效的截止时间。
可选的,星历的参考时间还可以是其它的关于星历的某个特定参考时间点,例如可以是上一次接收或配置星历的时间。
在第一方面一种可能的实现方式中,第一网元确定终端设备中的星历是否需要更新前,该方法还包括:该第一网元向第二网元发送第一请求,该第一请求用于请求该更新后的星历;该第一网元接收来自于该第二网元的该第一信息。在该实现方式中,若星历已经 发生了变更,网络侧能够及时的获取最新星历,不需要等待终端设备的请求。可以使得终端设备及时和有效的获取更新后的星历,提高终端设备预测的轨道或卫星的位置的精度,降低终端设备接入卫星小区的时延,从而提高通信效率和用户体验。
可选的,第一信息可能作为新的信息元素包含在现在的消息类型中,也可能是新的消息类型,或者是其他形式。
在第一方面一种可能的实现方式中,该第一请求包括:卫星标识或轨道标识中的一个或多个,其中,该卫星标识包括服务该终端设备的第一卫星的标识,该轨道标识包括服务该终端设备的第一卫星所在轨道的标识。
在第一方面一种可能的实现方式中,第一网元确定终端设备中的星历是否需要更新包括:该第一网元根据该星历更新指示信息,确定该终端设备中的星历是否需要更新。
在第一方面一种可能的实现方式中,该第一网元确定该终端设备中的星历需要更新,包括:该第一网元根据该终端设备的星历变更的精度和该更新后的星历,确定该更新后的星历和该终端设备中的星历间的差异达到该终端设备对于星历变更的精度要求,该星历变更的精度指示该终端设备对于星历变更的精度要求。
在第一方面一种可能的实现方式中,该第一网元确定该终端设备中的星历需要更新包括:该第一网元根据该终端设备的星历的有效期和该更新后的星历,确定该终端设备中的星历已超出有效期,该星历的有效期包括服务该终端设备的第一卫星的星历有效期。
在第一方面一种可能的实现方式中,该第一网元确定该终端设备中的星历需要更新,包括:该第一网元根据该终端设备的星历的参考时间和该更新后的星历,确定开始使用该终端设备中的星历的时间已发生变化,该星历的参考时间包括服务该终端设备的第一卫星的星历开始使用的时间。
在第一方面一种可能的实现方式中,该方法还包括:该第一网元根据该终端设备的位置信息或移动模型中的一个或多个,确定卫星标识或轨道标识,其中,该卫星标识包括服务该终端设备的第一卫星的标识,该轨道标识包括服务该终端设备的第一卫星所在轨道的标识。
在第一方面一种可能的实现方式中,该第一网元为接入和移动管理网元。
在第一方面一种可能的实现方式中,该第二网元为卫星接入网络设备、应用功能网元或者核心网网元。
在第一方面一种可能的实现方式中,该星历包括:卫星级参数或轨道平面参数中的一个或多个。
第二方面,提供了一种卫星星历更新的方法,该方法包括:第二网元确定卫星的星历是否发生变化;该第二网元向第一网元发送第一信息,该第一信息包括:更新后的星历或者星历未发生变化的指示信息。可选的,该第二网元可以为卫星接入网络设备(例如为SAT RAN)、应用功能网元(例如为AF)或者其它核心网网元。第一网元可以为接入和移动管网元(例如AMF)、能力开放网元(例如为NEF)或者为其它核心网网元。
第二方面提供的一种卫星星历更新的方法,网络侧可以及时的获星历是否发生变化,若星历已经发生了变更,网络侧能够及时获取变化后的最新星历,并及时将星历的变化信息通知给终端设备,可以使得终端设备及时和有效的获取更新后的星历,提高终端设备预测的轨道或卫星的位置的精度,降低终端设备接入卫星小区的时延,从而提高通信效率和 用户体验。
可选的,在第一网元接收到该第一信息后,可以通过下行NAS消息或者其它信令将该第一信息通知给终端设备,也可以在第一网元发送星历更新指示信息后将该第一信息发送给终端设备。
可选的,如果星历的变更依然满足终端设备对星历变更的精度的要求或者星历未发生变化,则第一网元可以不向终端设备发送星历未发生变化的指示信息,终端设备没有接收到第一网元发送的星历未发生变化的指示信息或者更新后的星历,则默认星历未发生变化,则第一终端设备可以继续使用之前的星历搜索卫星并接入卫星小区。
可选的,第一信息可能作为新的信息元素包含在现在的消息类型中,也可能是新的消息类型,或者是其他形式。
在第二方面一种可能的实现方式中,该方法还包括:该第二网元接收来自于该第一网元的第一请求,该第一请求用于请求该更新后的星历信息;该第二网元根据该第一请求,确定该更新后的星历或者星历未发生变化。在该实现方式中,第二网元不需要主动跟踪星历的变更,降低第二网元的开销和负担。并且,在星历未变更或变更程度不大时,不需要第二网元发送第一信息,可以减少信令消耗。
可选的,第一请求可能是作为新的信息元素包含在现在的消息类型中,也可能是新的消息类型,或者是其他形式。
在第二方面一种可能的实现方式中,该第一请求包括卫星标识或轨道标识中的一个或多个,其中,该卫星标识包括服务终端设备的第一卫星的标识,该轨道标识包括服务该第一卫星所在轨道的标识。
在第二方面一种可能的实现方式中,该第一请求还包括:星历变更的精度、星历的有效期或者星历的参考时间中的至少一种,其中,该星历变更的精度指示该终端设备对于星历变更的精度要求,该星历的有效期包括该第一卫星的星历有效期,该星历的参考时间包括该第一卫星的星历开始使用的时间。
在第二方面一种可能的实现方式中,该第一请求包括该星历变更的精度,则第二网元确定卫星的星历发生变化包括:该第二网元根据该星历变更的精度和该更新后的星历,确定该更新后的星历和更新前的星历间的差异达到该精度要求。
在第二方面一种可能的实现方式中,该第一请求包括该星历的有效期,则第二网元确定卫星的星历发生变化包括:该第二网元根据该星历的有效期和该更新后的星历,确定该第一卫星的星历已超出有效期。
在第二方面一种可能的实现方式中,该第一请求包括该星历的参考时间,则第二网元确定卫星的星历发生变化包括:该第二网元根据该星历的参考时间和该更新后的星历,确定开始使用该第一卫星的星历的时间已发生变化。
在第二方面一种可能的实现方式中,该第二网元为卫星接入网络设备,该方法还包括:该卫星接入网络设备根据该卫星的星历所对应的终端设备的位置信息或移动模型中的一个或多个,确定服务该终端设备的第一卫星的最新星历,该更新后的星历包括服务该终端设备的第一卫星最新的星历,其中,该卫星标识包括服务该终端设备的第一卫星的标识,该轨道标识包括服务该终端设备的第一卫星所在轨道的标识。
在第二方面一种可能的实现方式中,该第一网元为接入和移动管理网或者为能力开放 网元。
在第二方面一种可能的实现方式中,该第二网元为应用功能网元、卫星接入网络设备或者为核心网网元。
在第二方面一种可能的实现方式中,该星历包括:卫星级参数或轨道平面参数中的一个或者多个。
第三方面,提供了一种通信装置,该通信装置包括用于执行以上第一方面或第一方面的任意可能的实现方式中的各个步骤的单元。
第四方面,提供了一种通信装置,该装置包括至少一个处理器和存储器,该至少一个处理器用于执行以上第二方面或第二方面的任意可能的实现方式中的方法。
第五方面,提供了一种通信装置,该通信装置包括至少一个处理器和接口电路,该至少一个处理器用于执行以上第一方面或第一方面的任意可能的实现方式中的方法。可选的,该通信装置可以为AMF、SMF或者为其他核心网网元。
第六方面,提供了一种通信装置,该通信装置包括至少一个处理器和接口电路,该至少一个处理器用于执行以上第二方面或第二方面的任意可能的实现方式中的方法。可选的,该通信装置可以为卫星接入网络设备、应用功能网元或者其它核心网网元。
第七方面,提供了一种核心网设备,该核心网设备包括:上述第三方面或者第五方面提供的通信装置。可选的,该核心网设备可以为AMF、SMF或者为其他核心网网元等。
第八方面,提供了一种卫星接入网络设备,该卫星接入网络设备包括:上述第四方面或者第六方面提供的通信装置。
第九方面,提供了一种通信系统,该通信系统包括:上述第三方面、第五方面或者第七方面提供的通信装置,以及,上述第四方面、第六方面或者第八方面提供的通信装置。可选的,该通信系统还包括终端设备。
第十方面,提供了一种计算机程序产品,该计算机程序产品包括计算机程序,该计算机程序在被处理器执行时,用于执行第一方面或第一方面的任意可能的实现方式中的方法,或者,用于执行第二方面或第二方面的任意可能的实现方式中的方法。
第十一方面,提供一种计算机可读存储介质,该计算机可读存储介质中存储有计算机程序,当该计算机程序被执行时,用于执行第一方面或第一方面的任意可能的实现方式中的方法,或者执行第二方面或第二方面的任意可能的实现方式中的方法。
第十二方面,提供了一种芯片或者集成电路,该芯片或者集成电路包括:处理器,用于从存储器中调用并运行计算机程序,使得安装有该芯片或者集成电路的设备执行第一方面或第一方面的任意可能的实现方式中的方法,或者执行第二方面或第二方面的任意可能的实现方式中的方法。
本申请实施例提供的卫星星历更新的方法和通信装置,网络侧向终端设备及时的通知星历更新信息,可以使得终端设备及时和有效的获取更新后的星历,提高终端设备预测的轨道或卫星的位置的精度,降低终端设备接入卫星小区的时延,从而提高通信效率和用户体验。
图1是适用于本申请的一例无线通信系统架构的示意性框图。
图2是部分卫星星历参数所表示的物理含义的示意图。
图3是本申请一个实施例的卫星星历更新的方法的示意性交互图。
图4是本申请另一个实施例的卫星星历更新的方法的示意性交互图。
图5是本申请又一个实施例的卫星星历更新的方法的示意性交互图。
图6是本申请另一个实施例的卫星星历更新的方法的示意性交互图。
图7是本申请又一个实施例的卫星星历更新的方法的示意性交互图。
图8是本申请又一个实施例的卫星星历更新的方法的示意性交互图。
图9是本申请实施例提供的一例通信装置结构的示意性框图。
图10是本申请实施例提供的另一例通信装置结构的示意性框图。
图11是本申请实施例提供的又一例通信装置结构的示意性框图。
图12是本申请实施例提供的另一例通信装置结构的示意性框图。
图13是本申请实施例提供的一例卫星接入网络设备结构的示意性框图。
下面将结合附图,对本申请中的技术方案进行描述。
在本申请实施例的描述中,除非另有说明,“/”表示或的意思,例如,A/B可以表示A或B;本文中的“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,在本申请实施例的描述中,“多个”是指两个或多于两个。
以下,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本实施例的描述中,除非另有说明,“多个”的含义是两个或两个以上。
另外,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。本申请中使用的术语“制品”涵盖可从任何计算机可读器件、载体或介质访问的计算机程序。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,无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
本申请实施例的技术方案可以应用于各种通信系统,例如、长期演进(Long Term Evolution,LTE)系统、LTE频分双工(Frequency Division Duplex,FDD)系统、LTE时分双工(Time Division Duplex,TDD)、通用移动通信系统(Universal Mobile Telecommunication System,UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access,WiMAX)通信系统、第五代(5th Generation,5G)系统或新无线(New Radio,NR)等,本申请实施例对此并不限定。
本申请实施例中的终端设备可以指用户设备、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。终端设备还可以是蜂窝电话、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、可穿戴设备,未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(Public Land Mobile Network,PLMN)中的终端设备等,本申请实施例对此并不限定。
图1是适用于本申请的一例无线通信系统架构的示意性框图。如图1所示,该系统架构包括,终端设备,无线接入网设备(Radio Access Network,RAN)、核心网设备以及数据网络(data network,DN)。采用的是基于业务接口(service-based)的表现形式。图1中的终端设备可以用于通过无线空口连接到运营商部署的无线接入网设备,继而通过核心网设备连接到数据网络。无线接入网设备主要用于实现无线物理层功能、资源调度和无线资源管理、无线接入控制以及移动性管理等功能;核心网设备(也可以称为管理设备)主要用于终端设备的设备注册、安全认证、移动性管理和位置管理等。需要说明的是,图1仅为示例性架构图,除图1中所示功能单元之外,该网络架构还可以包括其它功能单元或功能网元,本申请实施例对此不进行限定。
图1中所示的终端设备可以为上述的任意一种可能的终端设备,例如,可以为:手机、电脑,还可以为蜂窝电话、无绳电话、会话发起协议(session initiation protocol,SIP)电话、智能电话、无线本地环路(wireless local loop,WLL)站、个人数字助理(personal digital assistant,PDA)、电脑、膝上型计算机、手持式通信设备、手持式计算设备、卫星无线设备、无线调制解调器卡、电视机顶盒(set top box,STB)、用户驻地设备(customer premise equipment,CPE)和/或用于在无线系统上进行通信的其它设备。上述无线接入网设备可以为接入网(access network,AN)/无线接入网(radio access network,RAN)设备,由多个5G-AN/5G-RAN节点组成的网络,该5G-AN/5G-RAN节点可以为:接入节点(access point,AP)、下一代基站(NR nodeB,gNB)、中心单元(central unit,CU)和分布式单元(distributed unit,DU)分离形态的gNB、收发点(transmission receive point,TRP)、传输点(transmission point,TP)或某种其它接入节点。
如图1所示的,上述核心网设备可以包括:统一数据管理网元(unified data management,UDM)、接入和移动性管理功能网元(access and mobility function,AMF)、会话管理功能网元(session management function,SMF)、策略控制功能网元(policy control function,PCF)、应用功能网元(application function,AF)、用户面功能网元(user plane funtion,UPF)、网络开放功能网元(Network Exposure Function,NEF)、网络仓库功能网元(Network Repository Function,NRF)、网络切片选择功能网元(Network Slice Selection function,NSSF)、鉴权服务器功能网元(Authentication Server Function,AUSF)等。这些功能单元可以独立工作,也可以组合在一起实现某些控制功能,如:AMF、SMF和PCF可以组合在一起作为管理设备,用于完成终端设备的接入鉴权、安全加密、位置注册等接入控制和移动性管理功能,以及用户面传输路径的建立、释放和更改等会话管理功能,以及分析一些切片(slice)相关的数据(如拥塞)、终端设备相关的数据的功能。
在图1的所示的5G网络中,各功能单元之间可以通过下一代网络(next generation,NG)接口建立连接实现通信,如:终端设备通过新无线(new radio,NR)接口与RAN 设备建立空口连接,用于传输用户面数据和控制面信令;终端设备可以通过NG接口1(简称N1)与AMF建立控制面信令连接;RAN设备可以通过NG接口3(简称N3)与分流点UPF建立用户面数据连接;RAN设备可以通过NG接口2(简称N2)与AMF建立控制面信令连接;UPF可以通过NG接口6(简称N6)与数据网络交互用户面数据。每个核心网网元可以通过相应的接口与其它核心网网元进行通信。例如,其它核心网网元可以通过Nnssf接口与NSSF进行通信,其它核心网网元可以通过Nnef接口与NEF进行通信等。
需要说明的是,图1所示的部分仅为示例性架构图,除图1所示的部分中所示功能单元之外,该网络架构还可以包括其它功能单元或功能网元,本申请实施例对此不进行限定。
应理解,本申请中的网元之间的接口名称仅是示例性的,网元之间的接口还可以是其它名称,本申请实施例对接口的名称不予限定。
还应理解,本申请实施例中的无线接入网设备可以是用于与终端装置和和核心网设备通信的设备,该无线接入网设备可以是全球移动通讯(global system of mobile communication,GSM)系统或码分多址(code division multiple access,CDMA)中的基站(base transceiver station,BTS),也可以是宽带码分多址(wideband code division multiple access,WCDMA)系统中的基站(NodeB,NB),还可以是LTE系统中的演进型基站(evolutional nodeb,eNB或eNodeB),还可以是云无线接入网络(cloud radio access network,CRAN)场景下的无线控制器,或者该接入网设备可以为中继站、接入点、车载设备、可穿戴设备以及5G网络中的网络设备或者未来演进的PLMN网络中的接入网设备等,本申请实施例对此并不限定。
还应理解,在本申请实施例中,例如在图1所示的架构中,无线接入网设备还可以称为无线卫星接入网络站点(或者无线卫星接入网络设备、无线卫星接入网络)、卫星接入网络站点(或者卫星接入网络设备、卫星接入网络)或者称为卫星网络站点(或者称为卫星网络设备、卫星网络),本申请实施例对此不做限定。卫星接入网络可以有多种部署方式,例如:同一个PLMN同时拥有地面3GPP接入网路和卫星3GPP接入网络,两种接入网络分别与核心网之间有独立的接口;又例如:不同的核心网共享同一卫星接入网络,共享的卫星接入网络会在广播系统信息中包含可用的PLMN;又例如:地面接入网络和卫星接入网络是独立的,即地面接入网络和卫星接入网络对应独立的PLMN;又例如:天空中的卫星仅负责信号传递,不具有接入网络的功能,这种场景也中可以卫星接入称为卫星回程。在上述的非卫星回程的场景中,卫星可以包含全部或部分接入网络的功能,本申请对此不做限定。当基站的全部功能集成在卫星上时,卫星接入网络设备可理解为卫星上基站部分功能的设备,接入网络的相关信令和数据处理全部在卫星上进行。基站的部分功能集成在卫星上,部分功能位于地面时,卫星接入网络设备可理解为卫星上的基站部分功能的设备和地面上的基站部分功能的设备,接入网络的相关信令和数据处理部分在卫星上进行部分在地面上进行。卫星回程时,卫星接入网络设备可理解为地面上的基站,接入网络的相关信令和数据处理全部在地面上进行,卫星在终端设备和卫星接入网络之间透传信令和数据。
在本申请实施例中,可以将卫星通信中的基站统称为卫星接入网络设备(satellite radio access network,SAT RAN)。
当前,卫星技术逐渐成熟,卫星数量已达到数以千计。卫星数量的上升使得卫星覆盖的精度和广度等趋于完备,从而为卫星通信的广泛使用奠定了基础。据此,第三代合作伙伴计划(3rd Generation Partnership Project,3GPP)等标准组织对卫星通信展开研究,3GPP从Release 15版本开始就对卫星通信的标准化进行了讨论研究。
根据卫星轨道的高度,可以将卫星划分为同步卫星和非同步卫星。同步卫星的海拔高度是35786KM,同步卫星的优点是卫星运动速率和地球一致,覆盖范围较大,且覆盖不会随着时间发生移动,缺点是由于高海拔导致通信时延较大。非同步卫星的海拔高度一般是在是500KM到45000KM之间,进一步可以将非同步卫星的轨道划分为低轨道、中轨道和高轨道。非同步卫星的优点是卫星时延相比同步卫星较低,缺点是覆盖范围相比同步卫星较小且覆盖随时间发生移动。虽然非同步卫星的移动带来了管理的复杂性,但其信号时延较低,所以很多卫星通信提供商选择了非同步卫星进行卫星通信。
终端设备成功接入网络之前需要搜索可用的网络,不同于地面的无线基站覆盖,卫星覆盖的卫星小区的可见天线角度相比地面小区窄的多,且卫星不断移动,这些都增加了终端设备通过搜索卫星网络接入到卫星小区的难度。如果终端设备没有卫星所在的位置信息,直接盲搜卫星小区,有可能会花费数小时才能成功搜索到网络,这严重影响了用户体验。
星历(Ephemeris),也可以称为星历表,历表,历书等,是用来定位任何时刻天体位置的信息。为了解决上面的问题,3GPP RAN工作组在RAN2#108会议上引入了卫星星历数据(或者可以成为卫星星历参数)。终端设备可以根据卫星星历数据来搜索网络,从而提高用户体验。RAN2#108会议确定的卫星星历包括的基本元素(参数)如下表1所示的:
表1
图2为所示的部分卫星星历参数所表示的物理含义的示意图。在图2中,升交点为是指卫星由南到北穿过地球赤道平面时,与地球赤道平面的交点。近心点幅角是指在卫星的轨道平面内,从升交点到近地点按照卫星运行方向所走过的角度,其数值是一个范围在0~360°之间的度数。
应理解,表1只是示例性的说明卫星星历参数可能包括的一些具体参数,在本申请实施例中,卫星星历参数可以不包含上述参数中的一种或多种,也可以包括其它类型的参数,本申请实施例对卫星星历参数的具体内容不做限制。
还应理解,在本申请实施例中,卫星星历也可以称为星历参数,卫星的星历参数,卫星接入网络中的卫星的星历参数,卫星回程中的卫星的星历参数或其它可能的名称,本申请对此不做限定。
考虑到卫星较多的场景,星历参数占用的空间较大,一般情况下配置星历时采取预配置的方式进行配置。目前,有两种方式预配置星历:
第一种:在终端设备中预配置好可能服务终端设备的所有轨道参数和所有卫星参数。终端设备可以据此预测卫星的位置,搜索卫星网络并接入卫星小区。
第二种:在终端设备中预配置好可能服务终端设备所有轨道的轨道参数。终端设备在轨道范围内搜索小区。在该轨道上的卫星广播卫星参数,终端设备据此预测卫星的位置,并接入网络。
随着时间的变化,服务终端设备的卫星的星历可能会发生变化。在卫星星历发生变更时,当前有两种可能的更新方式。一、通过应用层在终端更新。这种方式需要依赖应用,并且可靠性不强,及时性较弱,并且有向第三方暴露终端位置、能力等风险。二、通过接入网络广播更新的参数。但由于接入网络广播信令大小有限,且单个卫星具有的卫星星历数据可能有限,因此可能需要单个卫星多次广播,或多个卫星独立广播,造成信令消耗较大,且不及时。上述两种方式均不能及时有效地更新卫星星历。当卫星的星历发生变化时,终端设备不能及时和有效的获取更新后的星历,会造成终端设备预测的轨道或卫星的位置的精度下降,从而需要更长的时间才能成功接入卫星小区,增加了终端设备通信的时延,降低了通信效率,影响了用户体验。
有鉴于此,本申请提供了一种卫星星历更新的方法,向终端设备及时的通知星历更新 信息,可以使得终端设备及时和有效的获取更新后的星历,提高终端设备预测的轨道或卫星的位置的精度,降低终端设备接入卫星小区的时延,从而提高通信效率和用户体验。
下面结合图3详细说明本申请提供的卫星星历更新的方法,图3是本申请一个实施例卫星星历更新的方法200的示意性流程图。如图3所示,方法200可以包括S210至S220。
S210,第一网元确定终端设备中的星历是否需要更新。
S220,该第一网元向终端设备发送第一信息,该第一信息包括:更新后的星历或者星历未发生变化的指示信息。
在S210中,第一网元会确定终端设备中的星历是否需要更新。在本申请实施例中,终端设备中的星历可以理解为卫星接入网络中当前服务终端设备或即将服务终端设备的卫星的星历中的一个或者多个。星历可以包括一个或者多个卫星的对应的星历,例如,星历可以包括一个或者多个轨道平面参数(Orbital plane parameters),和/或,一个或者多个卫星级参数(Satellite level parameters)等,关于轨道平面参数和/或卫星级参数可以参考表1的描述。或者,换句话说,在本申请实施例中,星历可以包括:一个或者多个卫星的星历,和/或,一个或者多个轨道上所有卫星的星历,或者,星历还可能是个整体,甚至包括整个卫星系统的星历。在本申请实施例中,星历可以包括卫星级别的星历或轨道级别的星历中的一个或者多个。终端设备中的星历也可以理解为存储在终端设备中的星历。
在本申请实施例中,第一网元可以为核心网网元。例如,第一网元可以为AMF,或者为SMF等,本申请实施例中对于第一网元的具体形式不作限制。在S210中,第一网元确定终端设备中的星历是否需要更新。例如,AMF可以根据终端设备的位置或移动模型(Mobility Pattern)中的一个或多个,确定卫星标识或轨道标识。这里的卫星包括当前服务终端设备或即将服务终端设备的卫星中的一个或者多个,然后根据本地存贮的星历包括的参数,例如,星历变更的精度(或者也可以称为星历精度)、星历的参考时间、星历的有效期等,与确定的卫星标识或轨道标识指示的卫星的星历进行比较,例如,星历的精度变化超过要求、或者星历的精度已经不能满足要求、星历的有效期已经过期、或者星历的参考时间已经发生变化等,确定终端设备中的星历需要更新。其中,星历变更的精度指示终端设备对于星历变更的精度要求。星历的有效期指示终端设备使用的星历时间情况,为一个时间长度或者时间段,超过这个时间段,表示星历的有效期已过,星历不能再继续使用或者使用后的误差较大。星历的参考时间指示星历开始使用的时间段,为一个时间点。可选的,星历的参考时间和星历有效期的起始时间可以相同。
在确定终端设备中的星历是否需要更新后,在S220中,第一网元会向终端设备发送第一信息,该第一信息包括:更新后的星历或者星历未发生变化的指示信息。可选的,第一信息可以为任意一种下行NAS信息。如果第一信息包括更新后的星历,则终端设备可以根据更新后的星历搜索卫星并接入卫星小区。如果第一信息包括星历未发生变化的指示信息,则第一终端设备可以继续使用之前的星历搜索卫星并接入卫星小区。
可选的,在S220中,第一网元可以直接通过下行NAS消息将第一信息发送给终端设备,例如终端设备配置更新消息等。如果终端设备的星历有效期快到了(可根据阈值以及传输时延判断),则通过终端设备配置更新消息方式发送第一信息。或者,第一网元可以等待终端设备发送上行NAS消息之后,再通过下行NAS消息将更新后的星历或者星历未发生变化的指示信息发送给终端设备。本申请实施例在此不作限制。
可选的,在S220中,第一网元可以通过其它下行信令方式将第一信息发送给终端设备,例如第一网元将第一信息发送给接入网络,接入网络再将第一信息发送给终端设备。本申请实施例对第一网元向终端设备发送第一信息的方式不作限定。
本申请提供的卫星星历更新的方法,通过非接入层(non-access-stratum,NAS)的方式将星历更新的情况通知给终端设备。若星历已经发生了变更,核心网侧(或者核心网网元)能够及时的获取最新星历,不需要等待终端设备的请求,可以使得终端设备及时和有效的获取更新后的星历,提高终端设备预测的轨道或卫星的位置的精度,降低终端设备接入卫星小区的时延,从而提高通信效率和用户体验。
可选的,如果星历的变更依然满足终端设备对星历变更的精度的要求或者星历未发生变化,则第一网元可以不向终端设备发送星历未发生变化的指示信息,终端设备没有接收到第一网元发送的星历未发生变化的指示信息或者更新后的星历,则默认星历未发生变化,则第一终端设备可以继续使用之前的星历搜索卫星并接入卫星小区。
在本申请一些可能的实现方式中,如图4所示的,图4是本申请一些实施例中的卫星星历更新的方法的示意性流程图,在图3所示的方法步骤的基础上,该方法200还包括:S209。
S209,该第一网元接收来自于该终端设备的星历更新指示信息,即终端设备向第一网元发送星历更新指示信息,该星历更新指示信息用于指示更新该终端设备中的星历。
图4所示的步骤S210、S220可以参考上述对S210、S220的相关描述,为了简洁,这里不再赘述。
在S209中,终端设备可以主动向核心网网元(第一网元)发送星历更新指示信息,例如,星历更新指示信息可以承载在任意一种上行NAS消息中,或者承载在其它可能信令中。例如终端设备先向卫星接入网络设备发送星历更新指示信息,卫星接入网络设备再向第一网元发送星历更新指示信息。本申请实施例对终端设备向第一网元发送星历更新指示信息的方式不作限定。
可选的,终端设备可以在如下几种情况下向第一网元发送星历更新指示信息。
第一种情况:终端设备处于连接态,即终端设备与当前SAT RAN的连接还在,终端设备中的星历的有效期已过,为了防止下次进入空闲态时因星历变更导致的搜网困难,需要发起星历变更。因此,终端设备可以通过发送移动注册请求、服务请求或其它可能的上行信令承载该星历更新指示信息。
第二种情况:终端设备处于连接态,终端设备中的星历的有效期未过,但是终端设备移动到了上次注册时网络侧下发的注册区域外,为了防止终端设备下次进入空闲态时可能发生的切换轨道或卫星导致的搜网困难,需要发起星历变更。此时,终端设备一般会发起移动注册,移动注册请求中可以包含该星历更新指示信息。
第三种情况:终端设备初始注册到网络,网络侧可能需要将最新的星历发送给终端设备。因此终端设备需要发起星历更新,例如,该星历更新指示信息可以承载在初始的注册请求中。
第四种情况:终端设备处于空闲态,终端设备中的星历的有效期快到期,为了防止空闲态过期,此时终端设备主动发起星历更新。此时,终端设备可以通过初始NAS消息或其它上行信令发送星历更新指示信息。
应该理解,上述的几种情况只是举例说明终端设备可能发送星历更新指示信息的几种场景的示例,不应该对本申请造成任何限制。在本申请实施例中,终端设备还可以在其它情况下向核心网网元发送星历更新指示信息。本申请实施例在此不作限制。
可选的,在本申请实施例中,在下述四种场景中,终端设备发送给第一网元(例如为AMF)的上行NAS消息中可能不包含上述的星历更新指示:
第一种场景:上行NAS消息本身就包含请求网络将最新的星历发送给终端设备的目的。
第二种场景:终端设备从空闲态进入连接态发送的初始NAS消息,在这种场景下,第一网元因为提前配置成该场景下向终端设备提供最新的星历数据的原因而向终端提供最新的星历数据,如终端设备初始注册到网络等。
第三种场景:终端设备在移动注册下的场景,在这种场景下,第一网元因为提前配置成该场景下向终端设备提供最新的星历数据的原因而向终端提供最新的星历数据。
第四种场景:其他可能的导致终端设备下次搜网困难的场景等。
在第一网元接收该星历更新指示信息后,便可以根据该星历更新指示信息,确定终端设备中的星历是否需要更新。
本申请提供的星历更新的方法,终端设备向第一网元发送星历更新指示信息,第一网元(例如AMF)据此确定星历是否发生变化。第一网元不需要主动跟踪星历的变更,降低第一网元的开销和负担。并且,终端设备可利用连接态及时的获取最新的星历,在星历未变更或变更程度不大时,不需要第一网元发送星历更新指示信息,可以减少信令消耗。
可选的作为一种可能的实现方式,该星历更新指示信息包括一个或者多个卫星标识和/或一个或者多个轨道标识。其中,一个卫星标识用于唯一标识一个卫星,一个轨道标识用于唯一标识一个轨道。在本申请实施例中,第一卫星可以包括一个或者多个卫星,例如,服务该终端设备的第一卫星包括当前服务终端设备的卫星或即将服务终端设备的卫星中的一个或者多个。该卫星标识包括服务该终端设备的第一卫星的标识,该轨道标识包括该第一卫星所在轨道的标识,第一卫星所在的轨道可以为一个或者多个轨道。因此,在本申请实施例中,星历可以包括:一个或者多个卫星标识所标识的卫星的星历,和/或,一个或者多个轨道标识所标识的轨道上所有卫星的星历。或者,星历可以为整个卫星系统的星历。
应理解,在本申请实施例中,第一卫星的星历可以理解为:一个或者多个的轨道上所有卫星的星历;或者,还可以理解为:一个或者多个卫星的星历;或者,还可以理解为:整个卫星系统的星历。也就是说,第一卫星的星历可以为一个整体。可选的,在本申请中,第一卫星的星历也可以称为存储在终端设备中的星历。因此,星历更新指示信息中的卫星标识可以包括一个卫星标识或者多个卫星标识。由于当前服务终端设备的卫星和/或即将服务终端设备的卫星可能存在于一个或多个轨道上,因此,星历更新指示信息中的轨道标识可以包括一个轨道标识或者多个轨道标识。
可选的,作为一种可能的实现方式,该星历更新指示信息还包括:星历变更的精度、星历的有效期或者星历的参考时间中的至少一种。其中,该星历变更的精度指示该终端设备对于星历变更的精度要求,该星历的有效期包括存储在终端设备中的星历有效期,该星历的参考时间包括存储在终端设备中的星历开始使用的时间。其中,存储在终端设备中的 星历可以理解为:一个或者多个的轨道上所有卫星的星历;或者,还可以理解为:一个或者多个卫星的星历;或者,还可以理解为:整个卫星系统的星历。
例如,星历变更的精度可以包括如下内容:
一、精度的类型,例如:高精度、中精度、低精度等。对于每种精度类型,可以是协议预定义的或终端设备和第一网元(例如AMF)之间有约定好关于星历中的各参数的变更范围。
二、总体的精度范围值,例如:只用一个变更范围值(如可以是百分比的形式)用来表示星历的精度。换句话说:老星历中的任何一个参数发生变化超过该精度范围值,则表示老星历不再满足精度需求,在本申请实施例中,老星历可以理解为存储在终端设备中的卫星的星历。
三、一个或多个参数的精度范围值,例如:倾角的变化范围不超过1度,升交点赤经的变化范围不超过1.5度等等。又例如,可能仅提供星历中的一个参数的精度范围值,也可能提供多个参数或全部参数的精度范围值。
应该理解,星历变更的精度还可以以其它方式体现,例如参数值的上下限范围等,本申请实施例在此不作限制。
应该理解,星历的有效期可以是一个从参考时间开始的一个时间段长度,例如从参考时间开始的一天内有效;也可以是一个星历有效的截止时间,例如在2021年1月1日前有效;或者还可以是以其它方式体现。本申请实施例在此不作限制。
还应理解,星历的参考时间还可以是其它的关于星历的某个特定参考时间点,例如可以是上一次接收或配置星历的时间。本申请实施例在此不作限制。
可选的,在S220中,第一网元可以根据该星历更新指示信息,确定该终端设备中的星历是否需要更新。
作为一种可能的实现方式:如果该星历更新指示信息包括卫星标识或轨道标识中的一个或者多个,并且,包括该星历的参考时间,第一网元确定在该星历的参考时间后,确定开始使用该终端设备中的星历的时间已发生变化,则确定需要更新该终端设备中的星历。换句话说,如果更新后的星历的参考时间与该终端设备中的星历的参考时间大于或者等于预设或者预定义的阈值,则确定需要更新该终端设备中的星历。进一步的,第一网元确定相关的轨道和/或卫星的星历是否发生了变化。这里的相关的轨道可以为星历更新指示信息包括的轨道标识所标识的轨道。相关的卫星可以为星历更新指示信息包括的卫星标识所标识的卫星。若星历发生了变化,则在第一信息包含最新的星历信息。若星历没有发生变化,则在第一信息中指示星历未发生变化。或者,有部分轨道或卫星的星历发生变化,有部分未发生变化,则在第一信息中包含发生变化的部分星历信息,同时可能包含未发生变化部分的指示。
作为另一种可能的实现方式:如果该星历更新指示信息不包括卫星标识或轨道标识中的一个或者多个,而包括该星历的参考时间,则第一网元可以通过如下几种方式获取轨道标识和/或卫星标识:
第一种方式:终端设备提供轨道标识或卫星标识中的一个或者多个;第二种方式:第一网元(例如为AMF)基于终端设备提供的轨道标识或卫星标识中的一个或者多个,以及终端设备所在的位置或移动模型等,在终端设备提供的轨道标识和/或卫星标识的基础 上添加附加的轨道标识和/或卫星标识;第三种方式:若终端设备没有提供轨道标识和卫星标识,则第一网元(例如为AMF)基于终端设备所在的位置或移动模型等确定需要查询的轨道标识和/或卫星标识;第四种方式:第一网元(例如为AMF)基于其他可能的来源,如运营商配置、其他网元等,确定的需要查询的轨道标识和/或卫星标识。
其中,该卫星标识包括当前服务该终端设备或有可能将来服务该终端设备的第一卫星的标识,该轨道标识包括当前服务该终端设备或有可能将来服务该终端设备的第一卫星所在轨道的标识。进一步的,根据卫星标识和/或轨道标识,以及该星历的参考时间,确定开始使用该终端设备中的星历的时间已发生变化,则确定需要更新该终端设备中的星历。若星历发生了变化,则在第一信息包含最新的星历信息。若星历没有发生变化,则在第一信息中指示星历未发生变化。或者,有部分轨道或卫星的星历发生变化,有部分未发生变化,则在第一信息中包含发生变化的部分星历信息,同时可能包含未发生变化部分星历的指示。
作为另一种可能的实现方式:如果该星历更新指示信息包括卫星标识或轨道标识中的一个或者多个,并且,包括该星历变更的精度,第一网元如果确定该星历的变化程度大于或者等于预设或者预定义的阈值,则确定需要更新该终端设备中的星历。例如,如星历中的某个参数变的值变化的量2,而星历变更的精度要求是1,则需要变更星历。换句话说,该更新后的星历和该终端设备中的星历间的差异(或者差值)达到该终端设备对于星历变更的精度要求,第一信息包括该更新后的星历。在这种情况下,第一网元可能根据本地存储的信息确定当前终端设备中的星历。
作为另一种可能的实现方式:如果该星历更新指示信息包括卫星标识或轨道标识中的一个或者多个,并且,包括该终端设备的星历的有效期,第一网元确定该终端设备中的星历已超出有效期,则确定需要更新该终端设备中的星历。
作为另一种可能的实现方式:如果该星历更新指示信息不包括:卫星标识、轨道标识、星历变更的精度、星历的有效期或者星历的参考时间中的一个或者多个,则第一网元收到星历更新指示信息后,根据本地存储的信息确定当前最新的星历和上一次发送给该终端设备的星历相比已经发生了变化,则向该终端设备发送最新的星历。若该星历更新指示信息中未包含卫星标识和/或轨道标识,星历涉及的卫星和/或轨道可以是该第一网元根据该终端设备的位置信息或移动模型确定的。
应该理解,在上述的任意一种可能的实现方式中,如果星历若发生了变化,且变化大小超出了精度信息的需求,则第一信息包括最新的星历信息,同时可能基于星历变化的规律和/或精度提供最新的星历的有效期。如果星历发生了变化,且变化大小未超出精度的要求,则第一信息中包括指示星历发生了变化但精度还符合要求的指示信息外,同时可能基于星历变化的规律和/或精度信息提供老星历(老星历可以理解为当前服务终端设备的卫星的星历)的有效期,也可能提供新的星历以及其有效期。如果星历发生了变化,且变化大小未超出精度的要求,则第一信息中可能包含上述的信息外,还包含老星历的参考时间,该老星历的参考时间可能包含在最新的星历中,也可以独立于最新的星历提供。如果星历没有发生变化,则第一信息包括星历未发生变化的指示信息,还可以包括老星历更新后的有效期。
应该理解,上述的几种实现方式只是举例说明第一网元确定星历是否发生变更的几种 实现方式的示例,不应该对本申请造成任何限制。在本申请实施例中,第一网元还可以通过其它实现方式确定星历是否发生变更。例如,在第一网元收到星历变更指示信息后,认为终端设备是确定星历发生了变更才向其发送星历更新指示,于是确定只要收到星历更新指示信息就是星历发生了变更,从而在收到星历变更指示后直接向终端设备发送最新的星历。本申请实施例在此不作限制。
在本申请实施例中,第一网元根据该星历更新指示信息,确定该终端设备中的星历是否需要更新,可以提高星历更新的准确性,避免不必要的星历的更新。
第一网元如果有最新的星历,则第一网元可以自己确定终端设备中的星历是否需要更新,并且将第一信息发送给终端设备,如果第一网元没有最新的星历,则在本申请另一些可能的实现方式中可以获取到最新的星历。如图5所示的,图5是本申请一些实施例中的卫星星历更新的方法的示意性流程图,在图3所示的方法步骤的基础上,该方法200中的S210包括:S211、S212和S213。
S211,第一网元向第二网元发送第一请求,该第一请求用于请求该更新后的星历。可选的,第一请求可能是作为新的信息元素包含在现在的消息类型中,也可能是新的消息类型,或者是其他形式,本申请实施例对第一请求存在的形式不做限定。
S212,第二网元根据该第一请求,确定卫星的星历是否发生变化。
S213,该第二网元向第一网元发送第一信息,该第一信息包括:更新后的星历或者星历未发生变化的指示信息。可选的,第一信息可能作为新的信息元素包含在现在的消息类型中,也可能是新的消息类型,或者是其他形式,本申请实施例对第一信息存在的形式不做限定。
图5所示的步骤S220可以参考上述对S220的相关描述,为了简洁,这里不再赘述。
在S211中,如果第一网元没有最新的星历,第一网元还可以向第二网元发送第一请求,该第一请求用于请求该更新后的星历。可选的,在本申请实施例中,该第二网元为卫星接入网络设备(例如为SAT RAN)、应用功能网元(例如为AF)或者其它核心网网元。第一网元可以为接入和移动管网元(例如AMF)、能力开放网元(例如为NEF)或者为其它核心网网元。可选的,第一请求可以为星历查询请求或者为星历变更订阅信息。在S212中,第二网元接收该第一请求后,可以确定星历是否变化。在S213中,第二网元会向第一网元发送第一信息,该第一信息包括更新后的星历或者星历未发生变化的指示信息。
本申请提供的卫星星历更新的方法,若星历已经发生了变更,网络侧能够及时的获取最新星历,不需要等待终端设备的请求。可以使得终端设备及时和有效的获取更新后的星历,提高终端设备预测的轨道或卫星的位置的精度,降低终端设备接入卫星小区的时延,从而提高通信效率和用户体验。
应理解,图4所示的方法中也可以包括S211、S212和S213。
可选的,该第一请求包括:卫星标识或轨道标识中的一个或多个,其中,该卫星标识包括服务该终端设备的第一卫星的标识,该轨道标识包括服务该终端设备的第一卫星所在轨道的标识。在本申请实施例中,第一卫星可以包括一个或者多个卫星,例如,服务该终端设备的第一卫星包括当前服务终端设备的卫星和/或即将服务终端设备的卫星。该卫星标识包括该第一卫星的标识,该轨道标识包括该第一卫星所在轨道的标识,可选的,第一卫星所在的轨道可以为一个或者多个轨道。
应理解,第一请求中的轨道标识和/或卫星标识可能来源于下述几种场景:
第一种场景:终端设备提供轨道标识和/或卫星标识;第二种场景:第一网元(例如为AMF)基于终端设备提供的轨道标识和/或卫星标识,以及终端设备所在的位置或移动模型等,在终端设备提供的轨道标识和/或卫星标识的基础上添加附加的轨道标识和/或卫星标识;第三种场景:若终端设备没有提供轨道标识和卫星标识,则第一网元(例如AMF)基于终端设备所在的位置或移动模型等确定需要查询的轨道标识和/或卫星标识;第四种场景:第一网元(例如为AMF)基于其他可能的来源,如运营商配置、其他网元等,确定的需要查询的轨道标识和/或卫星标识。
可选的,该第一请求还可以包括:星历变更的精度、星历的有效期或者星历的参考时间中的至少一种。其中,该星历变更的精度指示该终端设备对于星历变更的精度要求,该星历的有效期包括存储在终端设备中的星历有效期,该星历的参考时间包括存储在终端设备中的星历开始使用的时间。
应理解,第二网元根据第一请求确定卫星的星历是否发生变化的具体过程可以参考上述的在S220中,第一网元可以根据该星历更新指示信息,确定该终端设备中的星历是否需要更新的过程的描述,为了简洁,这里不再赘述。
例如:该第二网元根据该星历变更的精度和该更新后的星历,确定该更新后的星历和更新前的星历间的差异达到该精度要求。
又例如:该第二网元根据该星历的有效期和该更新后的星历,确定该第一卫星的星历已超出有效期。
再例如:该第二网元根据该星历的参考时间和该更新后的星历,确定开始使用该第一卫星的星历的时间已发生变化。
再例如:第一请求中不包括:卫星标识、轨道标识、星历变更的精度、星历的有效期或者星历的参考时间中的一个或者多个,该第二网元在收到第一请求后,根据本地存储的信息确定星历需要更新,将最新的卫星星历发送给第一网元。
再例如:该第二网元在收到第一请求后,直接将最新的卫星星历发送给第一网元。
应理解,在本申请实施例中,对于第二网元根据第一请求确定卫星的星历是否发生变化的具体过程不作限制。
可选的,作为一种可能的实现方式,当该第二网元为卫星接入网络设备(例如为SAT RAN)的情况下,如果该第一请求中不包括卫星标识或轨道标识中的一个或多个,则该卫星接入网络设备还可以根据该终端设备的位置信息或移动模型中的一个或多个,确定该卫星标识或轨道标识中的一个或多个。其中,该卫星标识包括服务该终端设备的第一卫星的标识,该轨道标识包括该第一卫星所在轨道的标识。进一步的,根据该卫星标识或轨道标识,确定服务该终端设备的第一卫星的最新星历。其中,该更新后的星历包括服务该终端设备的第一卫星最新的星历,该卫星标识包括服务该终端设备的第一卫星的标识,该轨道标识包括服务该终端设备的第一卫星所在轨道的标识。
可选的,如果上述的第一请求为星历变更订阅信息,则在第一网元(以AMF为例说明)向第二网元(以SAT RAN为例进行说明)发送星历变更订阅信息之前,SAT RAN可以向AMF提供了SAT RAN所在的轨道或卫星信息,SAT RAN所在的轨道和/或卫星可以理解为SAT RAN当前所在的轨道或者卫星的信息,也可以包括SAT RAN保存的其 它轨道或者卫星的信息中的一个或多个。之后,AMF可以向SAT RAN发送该星历变更订阅信息,该星历变更订阅信息包括:SAT RAN提供的轨道中的一个或者多个轨道的标识,和/或,SAT RAN提供的卫星中的一个或者多个卫星的标识。这样可以避免SAT RAN将所有卫星的更新星历发送给AMF,而只需要将AMF订阅的卫星的星历的更新情况发送给AMF,可以降低信令的开销。
可选的,AMF可能在下述两种场景中向SAT RAN订阅星历的变更:
第一种场景:终端设备通过卫星接入网络,为了确保终端设备中的星历精度不会下降到不能满足其对精度的需求的程度,AMF需要跟踪服务终端设备的轨道和/或卫星的星历的变化。这种场景下,星历变更订阅信息包括的轨道和/或卫星信息就是服务终端设备的轨道或卫星信息中的一个或者多个。考虑到终端设备移动性,该星历变更订阅信息还可能包含服务终端设备的邻居轨道和/或邻居卫星信息。
第二种场景:SAT RAN向AMF提供的轨道和/或卫星信息与服务AMF管理的终端设备的轨道和/或卫星不同,这种情况下,AMF也可能订阅SAT RAN提供的轨道和/或卫星的星历的变更。
一般情况下,对于同一个轨道和/或卫星,AMF仅向一个SAT RAN订阅该星历变更。
本申请还提供了一种卫星星历更新的方法,下面结合图6详细说明本申请提供的卫星星历更新的方法,图6是本申请一个实施例卫星星历更新的方法300的示意性流程图。如图6所示,图6中示出的方法300可以包括S310至S320。
S310,第二网元确定卫星的星历是否发生变化。
S320,该第二网元向第一网元发送第一信息,该第一信息包括:更新后的星历或者星历未发生变化的指示信息。可选的,第一信息可能作为新的信息元素包含在现在的消息类型中,也可能是新的消息类型,或者是其他形式,本申请实施例对第一信息存在的形式不做限定。
在S310中,第二网元会确定卫星的星历是否发生变化,星历可以包括当前服务终端设备和/或即将服务终端设备的卫星的星历。换句话说,在本申请实施例中,星历可以包括:一个或者多个卫星的星历,和/或,一个或者多个轨道上所有卫星的星历,或者,星历还可能是个整体,甚至包括整个卫星系统的星历。在本申请实施例中,星历可以包括卫星级别的星历和/或轨道级别的星历。终端设备中的星历也可以理解为存储在终端设备中的星历。
在本申请实施例中,该第二网元可以为卫星接入网络设备(例如为SAT RAN)、应用功能网元(例如为AF)或者其它核心网网元。第一网元可以为接入和移动管网元(例如AMF)、能力开放网元(例如为NEF)或者为其它核心网网元。在S310中,第二网元确定卫星的星历是否发生变化。例如,第二网元可以根据本地存贮的星历包括的参数,例如,星历变更的精度、星历的参考时间、星历的有效期等确定星历是否发生变更,例如,星历的精度变化超过要求、星历的精度已经不能满足要求、星历的有效期已经过期、或者星历的参考时间已经发生变化等,则确定卫星的星历是否发生变化。
应该理解,第二网元还可能根据其他信息确定星历是否发生变化,例如只要第二网元中的星历信息有任何变化则确定星历发生了变化,将最新的星历发送给第一网元。本申请实施例对第二网元确定星历是否发生变化的过程不作限定。
在确定星历是否发生变化后,在S320中,第二网元会向第一网元发送第一信息,该第一信息包括:更新后的星历或者星历未发生变化的指示信息。其中,更新后的星历包括:服务终端设备的第一卫星的星历,星历未发生变化的指示信息可以为服务终端设备的第一卫星的星历未发生变化的指示信息。应理解,服务终端设备的第一卫星可以包括一个或者多个卫星,例如,包括当前服务终端设备的卫星和/或即将服务终端设备的卫星。该卫星标识包括服务该终端设备的第一卫星的标识,该轨道标识包括该第一卫星所在轨道的标识,第一卫星所在的轨道可以为一个或者多个轨道。因此,在本申请实施例中,星历可以包括:一个或者多个卫星标识所标识的卫星的星历,和/或,一个或者多个轨道标识所标识的轨道上所有卫星的星历。或者,星历可以为整个卫星系统的星历。
应理解,在本申请实施例中,第一卫星的星历可以理解为:一个或者多个的轨道上所有卫星的星历;或者,还可以理解为:一个或者多个卫星的星历;或者,还可以理解为:整个卫星系统的星历。也就是说,第一卫星的星历可以为一个整体。可选的,第一卫星的星历也可以称为存储在终端设备中的星历。
在第一网元接收到该第一信息后,可以通过下行NAS消息或者其它信令将该第一信息通知给终端设备,也可以在第一网元发送星历更新指示信息后将该第一信息发送给终端设备。如果第一信息包括更新后的星历,则终端设备可以根据更新后的星历搜索卫星并接入卫星小区。如果第一信息包括星历未发生变化的指示信息,则第一终端设备可以继续使用之前的星历搜索卫星并接入卫星小区。
还应理解,第一网元(例如为AMF)接收到第一信息(星历数据)后,若确定星历的变更依然满足终端设备对星历变更精度的要求(例如,AMF未向第二网元(例如为SAT RAN)发送老星历的参考时间、精度信息),或者,星历未发生变化,则AMF可能不向终端设备发送星历未发生变化的指示信息。换句话说,如果星历的变更依然满足终端设备对星历变更的精度的要求或者星历未发生变化,则AMF可以不向终端设备发送星历未发生变化的指示信息,终端设备没有接收到AMF发送的星历未发生变化的指示信息或者更新后的星历,则默认星历未发生变化,则第一终端设备可以继续使用之前的星历搜索卫星并接入卫星小区。
本申请提供的卫星星历更新的方法,网络侧可以及时的获星历是否发生变化,若星历已经发生了变更,网络侧能够及时获取变化后的最新星历,并及时将星历的变化信息通知给终端设备,可以使得终端设备及时和有效的获取更新后的星历,提高终端设备预测的轨道或卫星的位置的精度,降低终端设备接入卫星小区的时延,从而提高通信效率和用户体验。
可选的,如图7所示的,图7是本申请一些实施例中的卫星星历更新的方法的示意性流程图,在图6所示的方法步骤的基础上,该方法300还包括:S309。
S309,该第二网元接收来自于该第一网元的第一请求,即第一网元向第二网元发送第一请求,该第一请求用于请求更新后的星历信息。可选的,第一请求可能是作为新的信息元素包含在现在的消息类型中,也可能是新的消息类型,或者是其他形式,本申请实施例对第一请求存在的形式不做限定。
S310可以包括S311。
S311,该第二网元根据该第一请求,确定更新后的星历或者星历未发生变化。
图7所示的步骤S320可以参考上述对S320的相关描述,为了简洁,这里不再赘述。
在S309中,第一网元可以向第二网元发送第一请求,该第一请求用于请求该更新后的星历信息。可选的,第一请求可以为星历查询请求或者为星历变更订阅信息。在S311中,该第二网元根据该第一请求,确定更新后的星历或者星历未发生变化。关于S309和S311的具体描述可以参考上述的S211至S213的描述,为了简洁,这里不再赘述。
可选的,该第一请求包括卫星标识或轨道标识中的一个或多个,其中,该卫星标识包括服务终端设备的第一卫星的标识,该轨道标识包括服务该第一卫星所在轨道的标识。
可选的,该第一请求还包括:星历变更的精度、星历的有效期或者星历的参考时间中的至少一种。其中,该星历变更的精度指示该终端设备对于星历变更的精度要求,该星历的有效期包括存储在终端设备中的星历有效期,该星历的参考时间包括存储在终端设备中的星历开始使用的时间。其中,存储在终端设备中的星历可以理解为:一个或者多个的轨道上所有卫星的星历;或者,还可以理解为:一个或者多个卫星的星历;或者,还可以理解为:整个卫星系统的星历。换句话说,存在存储在终端设备中的星历可以为一个整体。
在本申请实施例中,第二网元根据第一请求,确定更新后的星历或者星历未发生变化。
例如,作为一种可能实现方式,该第一请求包括该星历变更的精度,则第二网元可以根据该星历变更的精度和该更新后的星历,确定该更新后的星历和更新前的星历间的差异达到该精度要求。
又例如,作为一种可能实现方式,该第一请求包括该星历的有效期,则该第二网元可以根据该星历的有效期和该更新后的星历,确定该第一卫星的星历已超出有效期。
再例如,作为一种可能实现方式,该第一请求包括该星历的参考时间,则第二网元根据该星历的参考时间和该更新后的星历,确定开始使用该第一卫星的星历的时间已发生变化。
再例如:作为一种可能实现方式,如果该第一请求中不包括:卫星标识、轨道标识、星历变更的精度、星历的有效期或者星历的参考时间中的一个或者多个,则第二网元根据本地存储的信息确定星历需要更新,将最新的卫星星历发送给第一网元。
再例如:该第二网元在收到第一请求后,直接将最新的卫星星历发送给第一网元。
应理解,第二网元根据第一请求确定卫星的星历是否发生变化的具体过程可以参考上述方法200相关的描述,为了简洁,这里不再赘述。
可选的,作为一种可能实现方式,在该第二网元为卫星接入网络设备的情况下,该卫星接入网络设备还可以根据该卫星的星历所对应的终端设备的位置信息或移动模型中的一个或多个,确定服务该终端设备的第一卫星的最新星历。其中,该更新后的星历包括服务该终端设备的第一卫星最新的星历,其中,该卫星标识包括服务该终端设备的第一卫星的标识,该轨道标识包括服务该终端设备的第一卫星所在轨道的标识。
本申请提供的卫星星历更新的方法,网络侧可以及时的获星历是否发生变化,若星历已经发生了变更,网络侧能够及时获取变化后的最新星历,并及时将星历的变化信息通知给终端设备,可以使得终端设备及时和有效的获取更新后的星历。
下面将结合具体的例子说明本申请提供的星历更新的方法。
图8所示为一例星历更新的方法的示意性交互图。如图8所示,该方法400包括:
S401,提前通过某种方式,例如操作、管理、维护(Operation Administration and Maintenance,OAM)配置,将AF的星历更新事件注册在NEF中。可选的,注册信息包括AF的标识、AF服务的标识、轨道信息、或者卫星信息中的一个或者多个。
S402,NEF向NRF发送网元更新请求消息,该网元更新请求消息用以更新其在NRF中的注册信息,即NEF配置(Profile)。该网元更新请求消息包括星历更新事件的标识。可选的,还可以包括:轨道信息、卫星信息、相关的AF的标识、或者应用的标识中的一个或者多个。
S403,NRF存储NEF的配置。
S404,NRF向NEF发送网元更新响应,用于确认NEF的配置已更新。
S405,AMF确定需要订阅星历的变更事件,向NRF发送网元发现请求,该网元发现请求用以发现可以用于订阅星历更新事件的合适的NEF。该网元发现请求包括网元类型,即NEF。可选的,该网元发现请求还可以包括:星历更新事件标识、轨道信息、卫星信息、精度信息、老星历的参考时间、相关的AF的标识、或者应用的标识中的一个或者多个。
S406,NRF匹配AMF提供的参数信息,向AMF发送网元发现响应,该网元发现响应中包含NEF的信息,例如:NEF的实例的标识,NEF的实例的地址等。
S407,AMF向NEF发送星历更新事件订阅消息,该消息用于AMF向NEF订阅星历更新事件。该消息包括:星历更新事件标识、轨道信息、卫星信息、相关的AF的标识、或者应用的标识中的一个或者多个。若NEF授权成功,则将星历变更事件的触发和AMF的标识关联。
S408,基于AMF的请求,NEF向AF发送星历更新事件订阅消息,该消息用于NEF向AF订阅星历变更事件。
S409,若星历发生了变更,则AF向NEF发送星历更新事件通知消息,该消息中包含最新的星历数据。AF确定星历是否发生变更时可能考虑AMF提供的精度信息和老星历的参考时间。例如:若星历变更的程度满足精度需求,则可能确定星历发生变更的结果是未变更。应理解,这里的星历变更可能是计划变更,即实际还未发生变更,此时发送星历数据的同时将变更的计划时间点一同发送。可选的,AF的通知消息中还可以包括:最新的星历数据的有效期等其它和星历相关的参数。
S410,基于AF的事件通知,NEF向AMF发送星历更新事件通知消息。该星历更新事件通知消息可以包括:最新的星历或者星历未发生变化的指示信息。可选的,该通知消息中还可以包括:星历有效期等。
S411,终端设备向AMF发送上行NAS信息,该上行NAS信息用于指示更新该终端设备中的星历。应理解,S411为可选的步骤。
S412,AMF向终端设备发送星历更新指示信息,星历更新指示信息包括:更新后的星历或者星历未发生变化的指示信息。可选的,该星历更新指示信息可以通过下行NAS信息或者其它信令承载。
本申请提供的卫星星历更新的方法,在第三方(例如AF等)管理卫星时,核心网侧可以及时的获取星历更新信息,并将其发送给终端设备。
应理解,上述只是为了帮助本领域技术人员更好地理解本申请实施例,而非要限制本申请实施例的范围。本领域技术人员根据所给出的上述示例,显然可以进行各种等价的修改或变化,例如,上述方法200、方法300以及方法400中的各个实施例中某些步骤可以 是不必须的,或者可以新加入某些步骤等。或者上述任意两种或者任意多种实施例的组合。这样的修改、变化或者组合后的方案也落入本申请实施例的范围内。
还应理解,上文对本申请实施例的描述着重于强调各个实施例之间的不同之处,未提到的相同或相似之处可以互相参考,为了简洁,这里不再赘述。
还应理解,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,本申请实施例中,“预先设定”、“预先定义”可以通过在设备(例如,包括终端和网络设备)中预先保存相应的代码、表格或其它可用于指示相关信息的方式来实现,本申请对于其具体的实现方式不做限定。
还应理解,本申请实施例中的方式、情况、类别以及实施例的划分仅是为了描述的方便,不应构成特别的限定,各种方式、类别、情况以及实施例中的特征在不矛盾的情况下可以相结合。
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。
以上结合图1至图8对本申请实施例的卫星星历更新的方法做了详细说明。以下,结合图9至图13对本申请实施例通信装置进行详细说明。
图9示出了本申请实施例的通信装置500的示意性框图,该装置300可以对应上述方法200描述的第一网元,也可以是应用于第一网元的芯片或组件,并且,该装置500中各模块或单元分别用于执行上述方法200、方法300、方法400、以及图3至图7、以及图8中第一网元(例如为AMF)所执行的各动作或处理过程。
如图9所示,该装置500包括处理单元510和收发单元520。收发单元520用于在处理单元510的驱动下执行具体的信号收发。
处理单元510,用于确定终端设备中的星历是否需要更新;
收发单元520,用于该向该终端设备发送第一信息,该第一信息包括:更新后的星历或者星历未发生变化的指示信息。
本申请提供的通信装置,可以将星历更新的情况通知给终端设备。若星历已经发生了变更,该通信装置(或者核心网网元)能够及时的获取最新星历,不需要等待终端设备的请求,可以使得终端设备及时和有效的获取更新后的星历,提高终端设备预测的轨道或卫星的位置的精度,降低终端设备接入卫星小区的时延,从而提高通信效率和用户体验。
可选的,在本申请的一些实施例中,收发单元520,还用于接收来自于该终端设备的星历更新指示信息,该星历更新指示信息用于指示更新该终端设备中的星历。
可选的,在本申请的一些实施例中,该星历更新指示信息包括卫星标识或轨道标识中的一个或者多个,该卫星标识包括服务该终端设备的第一卫星的标识,该轨道标识包括该第一卫星所在轨道的标识。
可选的,在本申请的一些实施例中,该星历更新指示信息还包括:星历变更的精度、星历的有效期或者星历的参考时间中的至少一种,
其中,该星历变更的精度指示该终端设备对于星历变更的精度要求,该星历的有效期包括该第一卫星的星历有效期,该星历的参考时间包括该第一卫星的星历开始使用的时 间。
可选的,在本申请的一些实施例中,收发单元520还用于:
向第二网元发送第一请求,该第一请求用于请求该更新后的星历;
接收来自于该第二网元的该第一信息。
可选的,在本申请的一些实施例中,该第一请求包括:卫星标识或轨道标识中的一个或多个,其中,该卫星标识包括服务该终端设备的第一卫星的标识,该轨道标识包括服务该终端设备的第一卫星所在轨道的标识。
可选的,在本申请的一些实施例中,处理单元510,还用于根据该星历更新指示信息,确定该终端设备中的星历是否需要更新。
可选的,在本申请的一些实施例中,处理单元510,还用于根据该终端设备的星历变更的精度和该更新后的星历,确定该更新后的星历和该终端设备中的星历间的差异达到该终端设备对于星历变更的精度要求,该星历变更的精度指示该终端设备对于星历变更的精度要求。
可选的,在本申请的一些实施例中,处理单元510,还用于根据该终端设备的星历的有效期和该更新后的星历,确定该终端设备中的星历已超出有效期,该星历的有效期包括服务该终端设备的第一卫星的星历有效期。
可选的,在本申请的一些实施例中,处理单元510,还用于根据该终端设备的星历的参考时间和该更新后的星历,确定开始使用该终端设备中的星历的时间已发生变化,该星历的参考时间包括服务该终端设备的第一卫星的星历开始使用的时间。
可选的,在本申请的一些实施例中,处理单元510,还用于根据该终端设备的位置信息或移动模型中的一个或多个,确定卫星标识或轨道标识,其中,该卫星标识包括服务该终端设备的第一卫星的标识,该轨道标识包括服务该终端设备的第一卫星所在轨道的标识。
可选的,在本申请的一些实施例中,该通信装置为接入和移动管理网元。
可选的,在本申请的一些实施例中,该第二网元为卫星接入网络设备、应用功能网元或者核心网网元。
可选的,在本申请的一些实施例中,该星历包括:卫星级参数或轨道平面参数中的一个或者多个。
进一步的,该装置500还可以该存储单元,收发单元520可以是收发器、输入/输出接口或接口电路。存储单元用于存储收发单元520和处理单元510执行的指令。收发单元520、处理单元510和存储单元相互耦合,存储单元存储指令,处理单元510用于执行存储单元存储的指令,收发单元520用于在处理单元510的驱动下执行具体的信号收发。
应理解,装置500中各单元执行上述相应步骤的具体过程请参照前文中结合方法200、方法300、方法400、以及图3至图7、图8中相关实施例的第一网元(例如AMF)相关的描述,为了简洁,这里不加赘述。
可选的,收发单元520可以包括接收单元(模块)和发送单元(模块),用于执行前述方法200、方法300、方法400、以及图3至图7、图8中所示的实施例的第一网元(例如AMF)接收信息和发送信息的步骤。
应理解,收发单元520可以是收发器、输入/输出接口或接口电路。存储单元可以是 存储器。处理单元510可由处理器实现。如图10所示,通信装置600可以包括处理器610、存储器620、收发器630。通信装置600的各个组件可以通过例如总线系统等耦合在一起。
图9所示的通信装置500或图10所示的通信装置600能够实现前述方法200、方法300、方法400、以及图3至图7、图8中相关实施例的第一网元(例如AMF)执行的步骤。类似的描述可以参考前述对应的方法中的描述。为避免重复,这里不再赘述。
还应理解,图9所示的通信装置500或图10所示的通信装置600可以为核心网设备,例如可以为AMF,或者为SMF,或者为其它核心网设备。本申请实施例在此不作限制。
图11示出了本申请实施例的通信装置700的示意性框图,该装置700可以对应上述方法200、方法300、以及图5至图7中描述的第二网元,也可以是应用于第二网元的芯片或组件,并且,该装置700中各模块或单元分别用于执行上述方法200、方法300中第二网元所执行的各动作或处理过程。
如图11所示,该装置700可以包括处理单元710和收发单元720。收发单元720用于在处理单元710的驱动下执行具体的信号收发。
处理单元710,用于确定卫星的星历是否发生变化;
收发单元720,用于向第一网元发送第一信息,该第一信息包括:更新后的星历或者星历未发生变化的指示信息。
本申请提供的通信装置,第二网元(网络侧)可以及时的获星历是否发生变化,若星历已经发生了变更,网络侧能够及时获取变化后的最新星历,并可以及时将星历的变化信息通知给终端设备,可以使得终端设备及时和有效的获取更新后的星历,提高终端设备预测的轨道或卫星的位置的精度,降低终端设备接入卫星小区的时延,从而提高通信效率和用户体验。
可选的,在本申请的一些实施例中,收发单元720,还用于接收来自于该第一网元的第一请求,该第一请求用于请求该更新后的星历信息;
处理单元710,还用于据该第一请求,确定该更新后的星历或者星历未发生变化。
可选的,在本申请的一些实施例中,该第一请求包括卫星标识或轨道标识中的一个或多个,其中,该卫星标识包括服务终端设备的第一卫星的标识,该轨道标识包括服务该第一卫星所在轨道的标识。
可选的,在本申请的一些实施例中,该第一请求还包括:星历变更的精度、星历的有效期或者星历的参考时间中的至少一种,
其中,该星历变更的精度指示该终端设备对于星历变更的精度要求,该星历的有效期包括该第一卫星的星历有效期,该星历的参考时间包括该第一卫星的星历开始使用的时间。
可选的,在本申请的一些实施例中,该第一请求包括该星历变更的精度,则处理单元710还用于:根据该星历变更的精度和该更新后的星历,确定该更新后的星历和更新前的星历间的差异达到该精度要求。
可选的,在本申请的一些实施例中,该第一请求包括该星历的有效期,则处理单元710还用于:根据该星历的有效期和该更新后的星历,确定该第一卫星的星历已超出有效期。
可选的,在本申请的一些实施例中,该第一请求包括该星历的参考时间,则处理单元 710还用于:根据该星历的参考时间和该更新后的星历,确定开始使用该第一卫星的星历的时间已发生变化。
可选的,在本申请的一些实施例中,该第二网元为卫星接入网络设备,处理单元710还用于:根据该卫星的星历所对应的终端设备的位置信息或移动模型中的一个或多个,确定服务该终端设备的第一卫星的最新星历,该更新后的星历包括服务该终端设备的第一卫星最新的星历,其中,该卫星标识包括服务该终端设备的第一卫星的标识,该轨道标识包括服务该终端设备的第一卫星所在轨道的标识。
可选的,在本申请的一些实施例中,该第一网元为接入和移动管理网或者为能力开放网元。
可选的,在本申请的一些实施例中,该通信装置为应用功能网元、卫星接入网络设备或者为核心网网元。
可选的,在本申请的一些实施例中,该星历包括:卫星级参数或轨道平面参数中的一个或者多个。
可选的,收发单元720可以包括接收单元(模块)和发送单元(模块),用于执行前述方法200、方法300中的各个实施例以及图5至图7所示的实施例中第二网元接收信息和发送信息的步骤。
进一步的,该装置700还可以该存储单元。收发单元720可以是收发器、输入/输出接口或接口电路。存储单元用于存储收发单元720和处理单元710执行的指令。收发单元720、处理单元710和存储单元相互耦合,存储单元存储指令,处理单元710用于执行存储单元存储的指令,收发单元720用于在处理单元710的驱动下执行具体的信号收发。
应理解,收发单元720可以是收发器、输入/输出接口或接口电路。存储单元可以是存储器。处理单元710可由处理器实现。如图12所示,通信装置800可以包括处理器810、存储器820和收发器830。
图11所示的通信装置700或图12所示的通信装置800能够实现前述方法200、方法300中的各个实施例以及图5至图7所示的实施例中第二网元执行的步骤。类似的描述可以参考前述对应的方法中的描述。为避免重复,这里不再赘述。
还应理解,图11所示的通信装置700或图12所示的通信装置800可以为卫星接入网络设备(例如为SAT RAN)、应用功能网元(例如为AF)或者其它核心网网元。本申请实施例在此不作限制。
还应理解,以上装置中单元的划分仅仅是一种逻辑功能的划分,实际实现时可以全部或部分集成到一个物理实体上,也可以物理上分开。且装置中的单元可以全部以软件通过处理元件调用的形式实现;也可以全部以硬件的形式实现;还可以部分单元以软件通过处理元件调用的形式实现,部分单元以硬件的形式实现。例如,各个单元可以为单独设立的处理元件,也可以集成在装置的某一个芯片中实现,此外,也可以以程序的形式存储于存储器中,由装置的某一个处理元件调用并执行该单元的功能。这里该处理元件又可以称为处理器,可以是一种具有信号处理能力的集成电路。在实现过程中,上述方法的各步骤或以上各个单元可以通过处理器元件中的硬件的集成逻辑电路实现或者以软件通过处理元件调用的形式实现。
在一个例子中,以上任一装置中的单元可以是被配置成实施以上方法的一个或多个集 成电路,例如:一个或多个专用集成电路(application specific integrated circuit,ASIC),或,一个或多个数字信号处理器(digital signal processor,DSP),或,一个或者多个现场可编程门阵列(field programmable gate array,FPGA),或这些集成电路形式中至少两种的组合。再如,当装置中的单元可以通过处理元件调度程序的形式实现时,该处理元件可以是通用处理器,例如中央处理器(central processing unit,CPU)或其它可以调用程序的处理器。再如,这些单元可以集成在一起,以片上系统(system-on-a-chip,SOC)的形式实现。
图13为本申请实施例提供的一种卫星接入网络设备900的结构示意图,可以用于实现上述方法中的卫星接入网络设备(例如为SAT RAN)的功能。卫星接入网络设备900包括一个或多个射频单元,如远端射频单元(remote radio unit,RRU)901和一个或多个基带单元(baseband unit,BBU)(也可称为数字单元,digital unit,DU)902。该RRU 901可以称为收发单元、收发机、收发电路、或者收发器等等,其可以包括至少一个天线9011和射频单元9012。该RRU 901部分主要用于射频信号的收发以及射频信号与基带信号的转换,例如用于向终端设备发送上述实施例中的信令消息。该BBU 902部分主要用于进行基带处理,对基站进行控制等。该RRU 901与BBU 902可以是物理上设置在一起,也可以物理上分离设置的,即分布式基站。
该BBU 902为基站的控制中心,也可以称为处理单元,主要用于完成基带处理功能,如信道编码,复用,调制,扩频等等。例如该BBU(处理单元)902可以用于控制基站90执行上述方法实施例中关于网络设备的操作流程。
在一个示例中,该BBU 902可以由一个或多个单板构成,多个单板可以共同支持单一接入制式的无线接入网(如LTE系统,或5G系统),也可以分别支持不同接入制式的无线接入网。该BBU 902还包括存储器9021和处理器9022。该存储器9021用以存储必要的指令和数据。例如存储器9021存储上述实施例中的码本等。该处理器9022用于控制基站进行必要的动作,例如用于控制基站执行上述方法实施例中关于网络设备的操作流程。该存储器9021和处理器9022可以服务于一个或多个单板。也就是说,可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
在一种可能的实施方式中,随着片上系统(system-on-chip,SoC)技术的发展,可以将902部分和901部分的全部或者部分功能由SoC技术实现,例如由一颗基站功能芯片实现,该基站功能芯片集成了处理器、存储器、天线接口等器件,基站相关功能的程序存储在存储器中,由处理器执行程序以实现基站的相关功能。可选的,该基站功能芯片也能够读取该芯片外部的存储器以实现基站的相关功能。
应理解,图13示例的卫星接入网络设备的结构仅为一种可能的形态,而不应对本申请实施例构成任何限定。本申请并不排除未来可能出现的其他形态的卫星接入网络设备结构的可能。
还应理解,当基站的全部功能集成在卫星上时,卫星接入网络设备可理解为卫星上的基站功能部分的单元或者设备,接入网络的相关信令和数据处理全部在卫星上进行。基站的部分功能集成在卫星上,部分功能位于地面时,卫星接入网络设备可理解为卫星上的基站功能部分的单元或者设备以及和地面上的基站设备,接入网络的相关信令和数据处理部 分在卫星上进行部分在地面上进行。卫星回程时,卫星接入网络设备可理解为地面上的基站设备,接入网络的相关信令和数据处理全部在地面上的基站进行,卫星在终端设备和卫星接入网络设备之间透传信令和数据。
应理解,本申请实施例中,该处理器可以为中央处理单元(central processing unit,CPU),该处理器还可以是其他通用处理器、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、分立硬件组件等。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。
还应理解,本申请实施例中的存储器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(read-only memory,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(random access memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的随机存取存储器(random access memory,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(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)。
上述实施例,可以全部或部分地通过软件、硬件、固件或其他任意组合来实现。当使用软件实现时,上述实施例可以全部或部分地以计算机程序产品的形式实现。该计算机程序产品包括一个或多个计算机指令或计算机程序。在计算机上加载或执行该计算机指令或计算机程序时,全部或部分地产生按照本申请实施例的流程或功能。该计算机可以为通用计算机、专用计算机、计算机网络、或者其他可编程装置。该计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输,例如,该计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。该计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集合的服务器、数据中心等数据存储设备。该可用介质可以是磁性介质(例如,软盘、硬盘、磁带)、光介质(例如,DVD)、或者半导体介质。半导体介质可以是固态硬盘。
本申请实施例还提供了一种通信系统,该通信系统包括:上述的第一网元、第二网元和上述的终端设备。
本申请实施例还提供了一种计算机可读介质,用于存储计算机程序代码,该计算机程序包括用于执行上述方法200至方法400中本申请实施例的卫星星历更新的方法的指令。该可读介质可以是只读存储器(read-only memory,ROM)或随机存取存储器(random access memory,RAM),本申请实施例对此不做限制。
本申请还提供了一种计算机程序产品,该计算机程序产品包括指令,当该指令被执行 时,以使得第一网元和第二网元分别执行对应于上述方法的第一网元和第二网元的操作。
本申请实施例还提供了一种系统芯片,该系统芯片包括:处理单元和通信单元,该处理单元,例如可以是处理器,该通信单元例如可以是输入/输出接口、管脚或电路等。该处理单元可执行计算机指令,以使该通信装置内的芯片执行上述本申请实施例提供的任一种卫星星历更新的方法。
可选地,上述本申请实施例中提供的任意一种通信装置可以包括该系统芯片。
可选地,该计算机指令被存储在存储单元中。
可选地,该存储单元为该芯片内的存储单元,如寄存器、缓存等,该存储单元还可以是该终端内的位于该芯片外部的存储单元,如ROM或可存储静态信息和指令的其他类型的静态存储设备,RAM等。其中,上述任一处提到的处理器,可以是一个CPU,微处理器,ASIC,或一个或多个用于控制上述的卫星星历更新的方法的程序执行的集成电路。该处理单元和该存储单元可以解耦,分别设置在不同的物理设备上,通过有线或者无线的方式连接来实现该处理单元和该存储单元的各自的功能,以支持该系统芯片实现上述实施例中的各种功能。或者,该处理单元和该存储器也可以耦合在同一个设备上。
可以理解,本申请实施例中的存储器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(read-only memory,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(random access memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的随机存取存储器(random access memory,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(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)。
本文中术语“系统”和“网络”在本文中常被可互换使用。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。
本申请中出现的术语“上行”和“下行”,用于在特定场景描述数据/信息传输的方向,比如,“上行”方向一般是指数据/信息从终端向网络侧传输的方向,或者分布式单元向集中式单元传输的方向,“下行”方向一般是指数据/信息从网络侧向终端传输的方向,或者集中式单元向分布式单元传输的方向,可以理解,“上行”和“下行”仅用于描述数据/信息的传输方向,该数据/信息传输的具体起止的设备都不作限定。
在本申请中可能出现的对各种消息/信息/设备/网元/系统/装置/动作/操作/流程/概念等各类客体进行了赋名,可以理解的是,这些具体的名称并不构成对相关客体的限定,所赋名称可随着场景,语境或者使用习惯等因素而变更,对本申请中技术术语的技术含义的理解,应主要从其在技术方案中所体现/执行的功能和技术效果来确定。
本领域普通技术人员可以意识到,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,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,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。
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。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,该单元的划分,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,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(read-only memory,ROM)、随机存取。
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 (34)
- 一种卫星星历更新的方法,其特征在于,包括:第一网元确定终端设备中的星历是否需要更新;所述第一网元向所述终端设备发送第一信息,所述第一信息包括:更新后的星历或者星历未发生变化的指示信息。
- 根据权利要求1所述方法,其特征在于,所述方法还包括:所述第一网元接收来自于所述终端设备的星历更新指示信息,所述星历更新指示信息用于指示更新所述终端设备中的星历。
- 根据权利要求2所述的方法,其特征在于,所述星历更新指示信息包括卫星标识或轨道标识中的一个或多个,所述卫星标识包括服务所述终端设备的第一卫星的标识,所述轨道标识包括所述第一卫星所在轨道的标识。
- 根据权利要求3所述的方法,其特征在于,所述星历更新指示信息还包括:星历变更的精度、星历的有效期或者星历的参考时间中的至少一种,其中,所述星历变更的精度指示所述终端设备对于星历变更的精度要求,所述星历的有效期包括所述第一卫星的星历有效期,所述星历的参考时间包括所述第一卫星的星历开始使用的时间。
- 根据权利要求1至4中任一项所述的方法,其特征在于,第一网元确定终端设备中的星历是否需要更新前,所述方法还包括:所述第一网元向第二网元发送第一请求,所述第一请求用于请求所述更新后的星历;所述第一网元接收来自于所述第二网元的所述第一信息。
- 根据权利要求5所述的方法,其特征在于,所述第一请求包括:卫星标识或轨道标识中的一个或多个,其中,所述卫星标识包括服务所述终端设备的第一卫星的标识,所述轨道标识包括服务所述终端设备的第一卫星所在轨道的标识。
- 根据权利要求2至6中任一项所述的方法,其特征在于,第一网元确定终端设备中的星历是否需要更新包括:所述第一网元根据所述星历更新指示信息,确定所述终端设备中的星历是否需要更新。
- 根据权利要求1至7中任一项所述的方法,其特征在于,所述第一网元确定所述终端设备中的星历需要更新,包括:所述第一网元根据所述终端设备的星历变更的精度和所述更新后的星历,确定所述更新后的星历和所述终端设备中的星历间的差异达到所述终端设备对于星历变更的精度要求,所述星历变更的精度指示所述终端设备对于星历变更的精度要求。
- 根据权利要求1至8中任一项所述的方法,其特征在于,所述第一网元确定所述终端设备中的星历需要更新包括:所述第一网元根据所述终端设备的星历的有效期和所述更新后的星历,确定所述终端设备中的星历已超出有效期,所述星历的有效期包括服务所述终端设备的第一卫星的星历有效期。
- 根据权利要求1至9中任一项所述的方法,其特征在于,所述第一网元确定所述终端设备中的星历需要更新,包括:所述第一网元根据所述终端设备的星历的参考时间和所述更新后的星历,确定开始使用所述终端设备中的星历的时间已发生变化,所述星历的参考时间包括服务所述终端设备的第一卫星的星历开始使用的时间。
- 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:所述第一网元根据所述终端设备的位置信息或移动模型中的一个或多个,确定卫星标识或轨道标识,其中,所述卫星标识包括服务所述终端设备的第一卫星的标识,所述轨道标识包括服务所述终端设备的第一卫星所在轨道的标识。
- 根据权利要求1至11中任一项所述的方法,其特征在于,所述第一网元为接入和移动管理网元。
- 根据权利要求5或6所述的方法,其特征在于,所述第二网元为卫星接入网络设备、应用功能网元或者核心网网元。
- 根据权利要求1至13中任一项所述方法,其特征在于,所述星历包括:卫星级参数或轨道平面参数中的一个或多个。
- 一种卫星星历更新的方法,其特征在于,包括:第二网元确定卫星的星历是否发生变化;所述第二网元向第一网元发送第一信息,所述第一信息包括:更新后的星历或者星历未发生变化的指示信息。
- 根据权利要求15所述的方法,其特征在于,所述方法还包括:所述第二网元接收来自于所述第一网元的第一请求,所述第一请求用于请求所述更新后的星历信息;所述第二网元根据所述第一请求,确定所述更新后的星历或者星历未发生变化。
- 根据权利要求16所述的方法,其特征在于,所述第一请求包括卫星标识或轨道标识中的一个或多个,其中,所述卫星标识包括服务终端设备的第一卫星的标识,所述轨道标识包括服务所述第一卫星所在轨道的标识。
- 根据权利要求17所述的方法,其特征在于,所述第一请求还包括:星历变更的精度、星历的有效期或者星历的参考时间中的至少一种,其中,所述星历变更的精度指示所述终端设备对于星历变更的精度要求,所述星历的有效期包括所述第一卫星的星历有效期,所述星历的参考时间包括所述第一卫星的星历开始使用的时间。
- 根据权利要求18所述的方法,其特征在于,所述第一请求包括所述星历变更的精度,则第二网元确定卫星的星历发生变化包括:所述第二网元根据所述星历变更的精度和所述更新后的星历,确定所述更新后的星历和更新前的星历间的差异达到所述精度要求。
- 根据权利要求18或19所述的方法,其特征在于,所述第一请求包括所述星历的有效期,则第二网元确定卫星的星历发生变化包括:所述第二网元根据所述星历的有效期和所述更新后的星历,确定所述第一卫星的星历已超出有效期。
- 根据权利要求18至20中任一项所述的方法,其特征在于,所述第一请求包括所述星历的参考时间,则第二网元确定卫星的星历发生变化包括:所述第二网元根据所述星历的参考时间和所述更新后的星历,确定开始使用所述第一卫星的星历的时间已发生变化。
- 根据权利要求15至21中任一项所述的方法,其特征在于,所述第二网元为卫星接入网络设备,所述方法还包括:所述卫星接入网络设备根据所述卫星的星历所对应的终端设备的位置信息或移动模型中的一个或多个,确定服务所述终端设备的第一卫星的最新星历,所述更新后的星历包括服务所述终端设备的第一卫星最新的星历,其中,所述卫星标识包括服务所述终端设备的第一卫星的标识,所述轨道标识包括服务所述终端设备的第一卫星所在轨道的标识。
- 根据权利要求15至22中任一项所述的方法,其特征在于,所述第一网元为接入和移动管理网或者为能力开放网元。
- 根据权利要求15至23中任一项所述的方法,其特征在于,所述第二网元为应用功能网元、卫星接入网络设备或者为核心网网元。
- 根据权利要求15至24中任一项所述方法,其特征在于,所述星历包括:卫星级参数或轨道平面参数中的一个或者多个。
- 一种通信装置,其特征在于,包括用于执行如权利要求1至14中任一项所述方法的各个步骤的单元。
- 一种通信装置,其特征在于,包括用于执行如权利要求15至25中任一项所述方法的各个步骤的单元。
- 一种通信装置,其特征在于,包括至少一个处理器和接口电路,所述至少一个处理器用于执行如权利要求1至14中任一项所述的方法。
- 一种通信装置,其特征在于,包括至少一个处理器和接口电路,所述至少一个处理器用于执行如权利要求15至25中任一项所述的方法。
- 一种通信系统,其特征在于,包括如权利要求28所述装置和与所述装置连接的另一装置。
- 一种通信系统,其特征在于,包括如权利要求29所述装置和与所述装置连接的另一装置。
- 一种芯片系统,其特征在于,所述芯片系统包括一个或多个接口电路和一个或多个处理器;所述接口电路和所述处理器通过线路互联;所述处理器用于执行如权利要求1至14中任一项所述的方法,或者用于执行如权利要求15至25中任一项所述的方法。
- 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质中存储有计算机程序或指令,当计算机读取并执行所述计算机程序或指令时,使得计算机执行如权利要求1至14中任一项所述的方法,或者执行如权利要求15至25中任一项所述的方法。
- 一种计算机程序产品,其特征在于,包含有计算机可执行指令,所述计算机可执行指令用于使计算机执行如权利要求1至14中任一项所述的方法或执行如权利要求15至25中任一项所述的方法。
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EP4102740A4 (en) | 2023-07-05 |
CN113452429A (zh) | 2021-09-28 |
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