WO2022028552A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2022028552A1
WO2022028552A1 PCT/CN2021/111034 CN2021111034W WO2022028552A1 WO 2022028552 A1 WO2022028552 A1 WO 2022028552A1 CN 2021111034 W CN2021111034 W CN 2021111034W WO 2022028552 A1 WO2022028552 A1 WO 2022028552A1
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WIPO (PCT)
Prior art keywords
ntn
location parameter
information
system information
location
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PCT/CN2021/111034
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English (en)
French (fr)
Inventor
罗禾佳
王晓鲁
陈莹
李榕
王俊
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21854521.8A priority Critical patent/EP4187933A4/en
Priority to KR1020237007833A priority patent/KR20230048376A/ko
Priority to JP2023508599A priority patent/JP7551900B2/ja
Publication of WO2022028552A1 publication Critical patent/WO2022028552A1/zh
Priority to US18/165,103 priority patent/US20230189200A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02Services making use of location information
    • H04W4/023Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/185Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851Systems using a satellite or space-based relay
    • H04B7/18513Transmission in a satellite or space-based system
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W64/00Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/003Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/185Space-based or airborne stations; Stations for satellite systems
    • H04B7/1853Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
    • H04B7/18545Arrangements for managing station mobility, i.e. for station registration or localisation
    • H04B7/18547Arrangements for managing station mobility, i.e. for station registration or localisation for geolocalisation of a station
    • H04B7/1855Arrangements for managing station mobility, i.e. for station registration or localisation for geolocalisation of a station using a telephonic control signal, e.g. propagation delay variation, Doppler frequency variation, power variation, beam identification
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02Services making use of location information
    • H04W4/025Services making use of location information using location based information parameters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02Services making use of location information
    • H04W4/025Services making use of location information using location based information parameters
    • H04W4/027Services making use of location information using location based information parameters using movement velocity, acceleration information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/08Access restriction or access information delivery, e.g. discovery data delivery
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/004Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/06Airborne or Satellite Networks

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method and apparatus.
  • NTN non-terrestrial-network
  • TA timing advance
  • Embodiments of the present application provide a communication method and apparatus, which are used by a terminal device to determine the location of the NTN device in the NTN.
  • a communication method comprising: a network device sending system information to a terminal device; wherein the system information includes a location parameter of a non-terrestrial network NTN device, and the system information is used to indicate the location parameter of the time information.
  • the system information is sent to the terminal device through the network device. Since the system information includes the location parameter of the NTN device, and the system information also indicates the time information of the location parameter. In this way, the terminal device can determine the location parameter of the NTN device at other times (eg, time t) other than the time t0 corresponding to the location parameter by means of calculation or the like. Further, the terminal device can calculate the TA of the uplink data sent by the terminal device at time t according to the location of the NTN device at time t and the location of the terminal device itself.
  • a predetermined time point in the change cycle of the system information is used to indicate the time information of the location parameter.
  • a predetermined time point in the change cycle of the first system information can be used as the timestamp of the location parameter of the NTN device in the first system information.
  • the first system information may include the location parameter of the NTN device at the predetermined time point in the change cycle. Then, after receiving the first system information, the terminal device can acquire the predetermined time point according to the agreement, and then the time information of the location parameter of the NTN device.
  • the predetermined time point is a start time point, or an end time point, or any one except the start time point and the end time point of the system information change cycle point in time.
  • the termination time point of the change period of the system information as the predetermined time point t0, it can be matched with the existing system information time stamp indication mechanism, and the overhead in the implementation process can be reduced.
  • the predetermined time point of the SI window carrying the system information is used to indicate the time information of the location parameter.
  • the predetermined time point of the SI window carrying the first system information can be used as the timestamp of the location parameter of the NTN device in the first system information.
  • the first system information may include the location parameter of the NTN device at the predetermined time point. Then, after receiving the first system information, the terminal device can acquire the predetermined time point according to the agreement, and then acquire the time information of the location parameter of the NTN device.
  • the predetermined time point is the boundary time of the latest system frame after the SI window carrying the system information ends.
  • the terminal device can obtain the predetermined time point according to the agreement. , and then obtain the time information of the location parameter of the NTN device.
  • the system information further includes: time information of the end position of the SI window carrying the predetermined system information block SIB; the time information of the end position of the SI window carrying the predetermined SIB is the position parameter time information.
  • the terminal device can obtain the predetermined time point according to the agreement. , and then obtain the time information of the location parameter of the NTN device.
  • the method further includes: the network device sends first indication information to the terminal device, where the first indication information is specifically used to indicate a reference time unit;
  • the time information is the time information of the location parameter;
  • the reference time unit is a system frame or a time slot.
  • the network device sends the first indication information to the terminal device, so that the terminal device can determine the time of the location parameter of the NTN device included in the first system information.
  • the network device sends the system information to the terminal device, there may be two ways: sending by broadcasting and sending by on-demand.
  • the On-demand mode the network device sends system information to the terminal device according to the request of the terminal device. Therefore, in the On-demand mode, it is not easy to use the system time number to indicate the time of the location parameter of the NTN device.
  • the above design is applied to the scenario of on-demand transmission, it can avoid binding the time information indicating the location parameter of the NTN device to the system time number, so that the implementation is more flexible.
  • the method further includes: the network device sends a short message short message to the terminal device; wherein, the update tag of the system information in the short message is in the NTN device Positional parameters remain unchanged when they are changed.
  • the update label of the first system information in the short message remains unchanged. In this way, the terminal device will not be informed that the SIB corresponding to the first system information has changed, and thus does not need to read the SIB.
  • the valueTag field corresponding to the system information remains unchanged when the location parameter of the NTN device changes.
  • the terminal device will not be informed that the SIB corresponding to the first system information has changed, and thus does not need to read the SIB.
  • the location parameter of the NTN device includes: the location of the NTN device; or, the location parameter of the NTN device includes: the location of the NTN device and motion information of the NTN device.
  • the terminal device can determine the location of the NTN device, the motion information of the NTN device, and the time t0 corresponding to these location parameters. Then, the terminal device can determine the position of the NTN device at other moments other than t0 according to the position of the NTN device and the motion information of the NTN device.
  • the location parameter of the NTN device includes the location parameter of the NTN device based on the geocentric earth-fixed coordinate system ECEF.
  • the location parameter of the NTN device includes the longitude and latitude of the NTN device and the altitude of the NTN device.
  • the altitude of the NTN device can be represented based on the altitude.
  • NTN devices such as LEO satellites
  • the altitude of NTN devices accounts for most of the earth radius (6371km)
  • so representing the height of NTN devices based on altitude can significantly reduce the bit overhead when transmitting information. .
  • the system information further includes: the offset amount offset of the timing advance TA of the terminal device and the change information of the offset.
  • the terminal device after receiving the system information, the terminal device can obtain the offset and offset change information of the TA of the terminal device. So that the terminal device can determine the TA when sending the uplink data according to the offset and the change information of the offset.
  • the network device is the NTN device; or the network device is an access network device, and the NTN device is a relay between the access network device and the terminal device equipment.
  • a communication method comprising: a terminal device receiving system information SI from a network device; wherein the system information includes a location parameter of a non-terrestrial network NTN device, and the system information is used to indicate the location Time information for the parameter.
  • a predetermined time point in the change cycle of the system information is used to indicate the time information of the location parameter.
  • the predetermined time point is a start time point, or an end time point, or any one except the start time point and the end time point of the system information change cycle point in time.
  • the predetermined time point of the SI window carrying the system information is used to indicate the time information of the location parameter.
  • the predetermined time point is the boundary time of the latest system frame after the SI window carrying the location parameter of the system information ends.
  • the method further includes: receiving, by the terminal device, first indication information from the network device, where the first indication information is used to indicate a reference time unit;
  • the time information is the time information of the location parameter;
  • the reference time unit is a system frame or a time slot.
  • the method further includes: receiving, by the terminal device, a short message short message from the network device; wherein, the update tag of the system information in the short message is at the location of the NTN device It remains unchanged when the parameter is changed.
  • the valueTag field corresponding to the system information remains unchanged when the location parameter of the NTN device changes.
  • the location parameter of the NTN device includes: the location of the NTN device; or, the location parameter of the NTN device includes: the location of the NTN device and motion information of the NTN device.
  • the location parameter of the NTN device includes the location parameter of the NTN device based on the geocentric earth-fixed coordinate system ECEF.
  • the location parameter of the NTN device includes the longitude and latitude of the NTN device and the altitude of the NTN device.
  • the system information further includes: the offset amount offset of the timing advance TA of the terminal device and the change information of the offset.
  • the network device is the NTN device; or the network device is an access network device, and the NTN device is a relay between the access network device and the terminal device equipment.
  • a communication apparatus comprising: a sending unit configured to send system information to a terminal device; wherein the system information includes a location parameter of a non-terrestrial network NTN device, and the system information is used to indicate the Time information for positional parameters.
  • a predetermined time point in the change cycle of the system information is used to indicate the time information of the location parameter.
  • the predetermined time point is a start time point, or an end time point, or any one except the start time point and the end time point of the system information change cycle point in time.
  • the predetermined time point of the SI window carrying the system information is used to indicate the time information of the location parameter.
  • the predetermined time point is the boundary time of the latest system frame after the SI window carrying the system information ends.
  • the system information further includes: time information of the end position of the SI window carrying the predetermined system information block SIB; the time information of the end position of the SI window carrying the predetermined SIB is the position parameter time information.
  • the sending unit is further configured to send first indication information to the terminal device, where the first indication information is specifically used to indicate a reference time unit; the time information of the reference time unit is the The time information of the location parameter; the reference time unit is a system frame or a time slot.
  • the sending unit is further configured to send a short message shortmessage to the terminal device; wherein, the update tag of the system information in the short message is kept when the location parameter of the NTN device changes constant.
  • the valueTag field corresponding to the system information remains unchanged when the location parameter of the NTN device changes.
  • the location parameter of the NTN device includes: the location of the NTN device; or, the location parameter of the NTN device includes: the location of the NTN device and motion information of the NTN device.
  • the location parameter of the NTN device includes the location parameter of the NTN device based on the geocentric earth-fixed coordinate system ECEF.
  • the location parameter of the NTN device includes the latitude and longitude of the NTN device and the altitude of the NTN device.
  • the system information further includes: the offset amount offset of the timing advance TA of the terminal device and the change information of the offset.
  • the communication device is built in the NTN device; or the communication device is built in an access network device, and the NTN device is a relay between the access network device and the terminal device equipment.
  • a communication apparatus comprising: a receiving unit configured to receive system information SI from a network device; wherein the system information includes a location parameter of a non-terrestrial network NTN device, and the system information is used to indicate Time information of the location parameter.
  • a predetermined time point in the change cycle of the system information is used to indicate the time information of the location parameter.
  • the predetermined time point is a start time point, or an end time point, or any one except the start time point and the end time point of the system information change cycle point in time.
  • the predetermined time point of the SI window carrying the system information is used to indicate the time information of the location parameter.
  • the predetermined time point is the boundary time of the latest system frame after the SI window carrying the location parameter of the system information ends.
  • the receiving unit is further configured to receive first indication information from a network device, where the first indication information is used to indicate a reference time unit; the time information of the reference time unit is the location parameter time information; the reference time unit is a system frame or a time slot slot.
  • the receiving unit is further configured to receive a short message shortmessage from the network device; wherein, the update tag of the system information in the short message is changed when the location parameter of the NTN device changes constant.
  • the valueTag field corresponding to the system information remains unchanged when the location parameter of the NTN device changes.
  • the location parameter of the NTN device includes: the location of the NTN device; or, the location parameter of the NTN device includes: the location of the NTN device and motion information of the NTN device.
  • the location parameter of the NTN device includes the location parameter of the NTN device based on the geocentric earth-fixed coordinate system ECEF.
  • the location parameter of the NTN device includes the longitude and latitude of the NTN device and the altitude of the NTN device.
  • the system information further includes: the offset amount offset of the timing advance TA of the terminal device and the change information of the offset.
  • the network device is the NTN device; or the network device is an access network device, and the NTN device is a relay between the access network device and the terminal device equipment.
  • a communication device comprising: at least one processor and an interface circuit, the at least one processor is configured to communicate with other devices through the interface circuit, and execute the above-mentioned first aspect or the second aspect. method.
  • a sixth aspect provides a chip, characterized in that the chip includes a processor, and when the processor executes computer program instructions, the chip causes the chip to execute the method provided in the first aspect or the second aspect.
  • a computer-readable storage medium comprising: computer software instructions; when the computer software instructions are executed in a data transmission device or a chip built in the data transmission device, the data transmission device is made to execute The method provided by the first aspect or the second aspect.
  • FIG. 1 is a schematic diagram of a change cycle of system information according to an embodiment of the present application
  • Fig. 2 is one of the system architecture diagrams of a kind of NTN provided by the embodiment of this application;
  • Fig. 3 is the second system architecture diagram of a kind of NTN provided by the embodiment of this application.
  • FIG. 4 is the third system architecture diagram of an NTN provided by an embodiment of the present application.
  • FIG. 5 is a fourth system architecture diagram of an NTN provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 7 is one of the schematic structural diagrams of a communication device according to an embodiment of the present application.
  • FIG. 8 is the second schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 9 is a third schematic structural diagram of a communication apparatus according to an embodiment of the present application.
  • Timing advance (TA)
  • the terminal device sends the system frame of uplink data after receiving the system frame of downlink data sent by the base station, the system frame of uplink data will have a different time when the system frame of uplink data arrives at the base station. Time difference.
  • the time difference between different terminal devices is also different. In this way, uplink information sent by different terminal devices will arrive at the base station at different times, causing interference.
  • the time when the signals from different terminal devices in the same subframe reach the base station can be basically aligned, and they can all fall within the cyclic prefix (CP) range, so that the base station can correctly receive signals from different terminal devices.
  • the requirements for the physical random access channel (PRACH) sequence also increase accordingly.
  • PRACH physical random access channel
  • the uncertainty of the TA increases
  • the cyclic prefix (CP) corresponding to the PRACH is also lengthened, which increases the system overhead and affects the overall communication quality.
  • the terminal device After the cell search process, the terminal device has obtained downlink synchronization with the network side, and obtained the physical-layer cell identity (PCI) of the cell. Next, the terminal device needs to acquire the system information of the cell, so as to know how the cell is configured, so as to access the cell and work normally in the cell.
  • PCI physical-layer cell identity
  • system information is mainly divided into master information blocks (MIB) and system information blocks (SIB).
  • the cell sends system information to all terminal devices in the cell through a broadcast control channel (BCCH).
  • the system information is mapped to the transport channel broadcast channel (BCH) and downlink shared channel (DL-SCH) through the BCCH.
  • BCH transport channel broadcast channel
  • DL-SCH downlink shared channel
  • BCH is only used to transmit MIB information and mapped to physical broadcast channel (PBCH);
  • DL-SCH is used to transmit various SIB information and mapped to physical downlink shared channel (PDSCH) .
  • the MIB is used to transmit the necessary information for the terminal device to access the network, and the SIBs are used to transmit the system information other than the MIB.
  • SIBs are divided into various types: SIB1, SIB2... SIBX. Among them, in different protocol standards, the type number X of SIBs is different.
  • the transmission design of system information includes the following three characteristics:
  • SIBs except SIB1 are carried by SI messages of Radio Resource Control (RRC), and which SIBs included in an SI message are specified by si-SchedulingInfo in SIB1. Also, each SIB can only be included in one SI message.
  • RRC Radio Resource Control
  • one or more SIBs having the same scheduling period except SIB1 may be included in one SI message for transmission.
  • SIB2 and SIB3 may be included in one SI message for transmission.
  • SI-window an SI message is only transmitted in one SI window (SI-window).
  • SI-window an SI message is associated with an SI window.
  • this SI message can be sent and can be sent repeatedly (how many times to send, on which slots to send, etc., which can be set as needed), but cannot be sent.
  • other SI messages Two adjacent SI windows are next to each other, neither overlapping nor spaced.
  • the SI window length is the same for all SI messages.
  • the periods of different SI messages are independent of each other.
  • Each SI message contains at least one SIB, and SIBs with the same scheduling period can be transmitted in the same SI message.
  • the system information can be transmitted multiple times within a modification period, but the content of the system information will not change within the same modification period.
  • the system information to be transmitted includes SIB1, SIB2 and SIB3.
  • SIB1, SIB2 and SIB3 can be sent multiple times, but the contents of SIB1, SIB2 and SIB3 sent in one change period will not change.
  • the starting system frame of the change period of the system information satisfies the formula:
  • SFN is the system frame number (system frame number);
  • m is the number of system frames constituting one change cycle, that is, one change cycle includes m system frames. in:
  • modificationPeriodCoeff is set through SIB1->ServingCellConfigCommon->DownlinkConfigCommonSIB->BCCH-Config, and the value is usually: 2 or 4 or 8 or 16.
  • the value is rf32 or rf64 or rf128 or rf256 radio frames.
  • the change cycle is an integer multiple of the paging cycle.
  • the network side when the cell modifies some system information, the network side will first send a change instruction to the terminal device within a change cycle to notify the terminal device that the system information will be changed. Then in the next change cycle, the network side will send the updated system information.
  • the terminal device receives the change instruction, but the system information at this time is still the old system information, that is, the system information in the figure 1.
  • the network side starts to broadcast new system information (ie, system information 2 in the figure).
  • the system information 3 does not change in the change period n and the change period n+1, and therefore remains unchanged.
  • the first is to indicate whether the SI message has changed through the short message (ShortMessage) of DCI1_0, and the Short Message is sent to the UE through the PDCCH scrambled by the P-RNTI.
  • ShortMessage short message
  • the Short Message contains a systemInfoModification field (notifying the change of SIB1/SIB2/SIB3/SIB4/SIB5) and an etwsAndCmasIndication (notifying the change of SIB6/SIB7/SIB8), if the Short Message received by the UE contains this field , it means that the system information will change in the next change cycle.
  • each SIB except SIB1 in the system information corresponds to a valueTag field in SIB1. Whenever the SIB changes, the value of the corresponding valueTag will be incremented by 1.
  • SI-SchedulingInfo->SchedulingInf->sib-MappingInfo in SIB1 includes a field valueTag (value range 0-31), which is used to indicate whether the SI message corresponding to the SIB has changed.
  • the UE can use this field to check whether the previously saved SI message is still valid (eg, from outside the cell coverage back into the cell coverage). If this field has changed, the UE considers that the saved system information is invalid and needs to be read again; otherwise, the saved system information is considered to be still valid. In addition, the UE will consider that within 3 hours from the moment of receiving the SI message, if the valueTag does not change, the saved system information is valid. That is, the validity period of the saved SI message is 3 hours.
  • NTN Non-terrestrial-network
  • a communication network that provides communication services to terminal equipment using satellites or airborne/vehicles is called a non-terrestrial network.
  • devices such as satellites or aerial vehicles deployed in the air in the NTN may be referred to as NTN devices.
  • the NTN device may be any one of a satellite, a high altitude platform system (HAPS), and an air to ground (ATG) device.
  • NTN includes two types of transmission, transparent transmission and non-transparent transmission (non-transparent transmission is also called "regenerative transmission").
  • transparent transmission NTN only the frequency conversion and signal amplification are performed on the NTN equipment, that is, the NTN equipment is the relay equipment between the terminal equipment and the access network equipment.
  • the non-transparent NTN the NTN equipment has the functions of some or all of the access network equipment.
  • FIG. 2 shows a schematic diagram of a system architecture for transparently transmitting NTN to which the present application applies.
  • the terminal equipment and the NTN equipment are connected wirelessly, and the NTN equipment is connected with the access network equipment through a gateway on the ground.
  • the access network equipment is connected to the core network.
  • FIG. 3 shows a schematic diagram of a system architecture of a non-transparent NTN to which the present application applies.
  • the terminal device and the NTN device are connected wirelessly, and the NTN device can be connected to the core network through a ground gateway.
  • the terminal device may be a device with a wireless transceiver function.
  • Terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle; can also be deployed on water (such as ships, etc.); can also be deployed in the air (such as aircraft, balloons and satellites, etc.).
  • the terminal equipment may be user equipment (user equipment, UE).
  • the UE includes a handheld device, a vehicle-mounted device, a wearable device or a computing device with a wireless communication function.
  • the UE may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function.
  • the terminal device may also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, intelligent Wireless terminals in power grids, wireless terminals in smart cities, wireless terminals in smart homes, and so on.
  • the apparatus for implementing the function of the terminal device may be the terminal device, or may be an apparatus capable of supporting the terminal device to implement the function, such as a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the terminal device as the terminal device as an example.
  • the NTN equipment can be any one of a satellite, a high altitude platform system (HAPS), and an air to ground (Air to ground, ATG) device.
  • HAPS high altitude platform system
  • ATG Air to ground
  • the core network includes multiple core network elements (or network function network elements), such as: AMF network element, session management function (SMF) network element, PCF network element, user plane function (user plane function, UPF) network element, application layer function (application function) network element, AUSF network element, and UDM network element.
  • AMF session management function
  • PCF PCF network element
  • user plane function user plane function
  • UPF application layer function
  • AUSF AUSF network element
  • UDM UDM network element
  • Access network devices may include but are not limited to: access points (access points, APs) in wireless fidelity (WiFi) systems, such as home gateways, routers, servers, switches, bridges, etc., and evolved node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS) , home base station (for example, home evolved Node B, or home Node B, HNB), baseband unit (baseband unit, BBU), wireless relay node, wireless backhaul node, transmission point (transmission and reception point, TRP or transmission point , TP), etc., and can also be 5G, such as a gNB in a new radio (new radio, NR) system, or a transmission point (TRP or TP), one or a group of base stations in a 5G system (including multiple antennas panel) antenna panel, or
  • the access network device may adopt a CU-DU architecture. That is, the access network device may be composed of a CU and at least one DU. In this case, some functions of the access network device are deployed on the CU, and another part of the functions of the access network device are deployed on the DU.
  • CU and DU are functionally divided according to the protocol stack.
  • the CU is deployed with the radio resource control (RRC) layer, the PDCP layer, and the service data adaptation protocol (SDAP) layer in the protocol stack; the DU is deployed with the protocol stack.
  • the CU has the processing capabilities of RRC, PDCP and SDAP.
  • DU has the processing capability of RLC, MAC and PHY. It can be understood that the division of the above functions is only an example, and does not constitute a limitation on the CU and the DU. That is to say, there may also be other functional division manners between the CU and the DU, which are not described in detail in this embodiment of the present application.
  • the distance between the terminal device and the NTN device also changes dynamically with the location of the NTN device, and the size of the timing advance of the terminal device also needs to be Dynamic changes.
  • terminal equipment can use the following methods to calculate TA:
  • the terminal device acquires the position coordinates Sat_pos of the NTN device and the position coordinates UE_pos of the terminal device itself.
  • the terminal device calculates the TA when the terminal device sends uplink data according to the position coordinate Sat_pos of the NTN device and the position coordinate UE_pos of the terminal device itself.
  • the offset can be specifically used to reflect other parameters that have an impact on the size of the TA except the position coordinate Sat_pos of the NTN device and the position coordinate UE_pos of the terminal device itself.
  • offset can be used to reflect all or part of the transmission delay of a feeder link in a transparent NTN.
  • the feederlink includes a display common timing advance (indicated common TA) and a network compensated delay (network compensated delay)
  • the offset can be used to indicate the common timing advance displayed in the transmission delay of the feederlink in the figure. (indicated common TA).
  • the offset can be used to reflect the positioning error of the NTN device or the terminal device.
  • O represents the position determined by the terminal device based on the positioning system (positioning based on GNSS)
  • O' represents the position determined by the NTN device based on ephemeris (positioning based on ephemeris)
  • H represents the NTN
  • S represents the distance from the terminal device to the sub-satellite point of the NTN device (distance from sub-satellite point)
  • D represents the positioning error range of the terminal device (positioning error)
  • E represents the positioning of the NTN device
  • the error range, the calculated distance of TA can refer to
  • offset may be a parameter for reflecting D and E in FIG. 5 .
  • parameters such as a pre-offset amount N TA_offse used to reflect the timing of a time-division duplex (TDD) system, a distance between an NTN device and a virtual coordinate position, and the like can also be offset.
  • the offset can be used to determine the timing advance TA of the terminal device, the specific content reflected by the offset may not be limited.
  • the terminal device can use the following formula 1 to calculate the TA when the terminal device sends the MSG1 message:
  • represents the distance from the NTN device to the terminal device.
  • Sat_pos represents the NTN device location, where Sat_pos can be the actual location coordinates of the NTN device.
  • Sat_pos can also be the coordinates of some virtual reference point positions.
  • an NTN device, ATG or HAPS device may not want to disclose the position of its own device, so it will inform the terminal device of a virtual coordinate position.
  • the coordinate position can also determine the distance from the NTN device to the terminal device.
  • UE_pos represents the position of the terminal device.
  • the network device sends the system information carrying the location parameter of the NTN device to the terminal device, so that the terminal device knows the location of the NTN device.
  • the location parameter sent by the network device to the terminal device is only the instantaneous value of the location of the NTN device at a certain moment.
  • the system information has a change cycle mechanism, the location parameters sent through the system information can only be updated once every change cycle.
  • the terminal device needs to use the location parameter of the NTN device when sending uplink data to calculate the TA. If the location parameter carried in the above system information is used to calculate the size of the TA, the uncertainty of the TA will increase, which will affect the communication quality. .
  • the change cycle of the system information is 64 system frames.
  • one system frame corresponds to 10ms, and 64 system frames are 0.64s. That is to say, within 0.64s, the network device can only statically inform the location parameters of the NTN device. If the NTN device moves at a speed of 7.5km/s, the NTN device can move 4.8km (ie, 0.64s ⁇ 7.5km/s) after 0.64s, which means that the error of the position of the NTN device may reach 4.8km at most. This error will lead to the uncertainty of TA of 4.8km ⁇ 2, which will increase the CP length of PRACH, and does not make full use of the location of NTN equipment and terminal equipment to determine a more accurate TA.
  • NR New Radio access technology
  • the update cycle of the location parameter of the NTN device may be shorter than other types of system information
  • the network device when the network device sends the system information carrying the location parameter of the NTN device to the terminal device, it may also cause the system information to be changed. Frequent updates, which in turn lead to too frequent SI update prompts.
  • the present application considers that when the network device sends the location parameter of the NTN device to the terminal device, it also informs the terminal device of the time information corresponding to the location parameter. In this way, after the terminal device receives the location parameter of the NTN device, it can determine the time corresponding to the location parameter according to the time information corresponding to the location parameter, and then according to the time corresponding to the location parameter and the time of the uplink data sent by the terminal device The difference between the times, to estimate the position of the NTN device when sending the upstream data. Thereby, a more accurate TA is determined.
  • the location parameters sent by the network device to the terminal device may include: location coordinates ⁇ x, y, z ⁇ of the NTN device, velocity ⁇ Vx, Vy, Vz ⁇ , acceleration ⁇ ax, ay, az ⁇ , and offset value d , the rate of change of offset v o , the derivative a_d of the rate of change of offset, etc.
  • the network device also informs the terminal device of the time t0 corresponding to the above location parameter.
  • the terminal device After the terminal device obtains the above position parameters and time t0, it can calculate the position coordinates Sat_pos and offset of the NTN device at the time t when the uplink data is sent by using the following formulas 2 and 3:
  • the above formula 1 can be used to calculate the TA of the terminal device sending MSG1 at time t.
  • the representation of the offset in this application may not be limited.
  • the offset takes the distance as the dimension, and then TA can be calculated by using the calculation method as the above formula 1.
  • the corresponding calculation method can be used to calculate TA.
  • the corresponding distance can also be converted into time, and then the offset can be described with time as the dimension.
  • the offset takes time as the dimension, the following formula 4 can also be used to calculate the TA when the terminal device sends the MSG1 message:
  • TAforMSG1
  • This embodiment provides a communication method, which can be applied to the communication system shown in FIG. 2 or FIG. 3 . As shown in Figure 6, the method includes:
  • a network device sends first system information to a terminal device.
  • the first system information includes a location parameter of the NTN device, and the first system information is used to indicate time information of the location parameter.
  • the terminal device can first determine the location parameter of the NTN device by decoding the first system information, and then determine the location of the NTN device.
  • the terminal device can also learn the time t0 corresponding to the location parameter. In this way, the terminal device can obtain the position of the NTN device at time t by means of calculation or the like, for example, the position of the NTN device at time t can be calculated by using the above formula 2.
  • the terminal device can calculate the TA of the uplink data sent by the terminal device at time t according to information such as the location of the NTN device at time t and the location of the terminal device itself.
  • the first system information used to carry the location parameter of the NTN device may include any one of the following three implementation manners:
  • the first system information may be SIB1.
  • the terminal device can also obtain the location parameters of the NTN device earlier.
  • the first system information may be other SIBs other than SIB1 defined in existing protocol standards, such as SIB2, SIB3, and so on.
  • SIBs other than SIB1 to transmit the location parameters of the NTN device.
  • additional SIB-related description fields can be avoided, and the description signaling overhead can be simplified.
  • the information of these SIBs can be shared among different cells (cells) under the same satellite.
  • the first system information may be an SIB specially created to carry the location parameter of the NTN device.
  • the SIB is specially created for the location parameter of the bearing NTN device, so that the message classification can be clearer, and it is easy for developers to understand and manage in the development process. And the information of this SIB can be shared among different cells under the same satellite.
  • the network device may be an access network device.
  • the NTN device is a relay device between the access network device and the terminal device.
  • the access network device may send the above-mentioned first system information to the terminal device through the NTN device.
  • the network device may be an NTN device.
  • the NTN device may send the first system information to the terminal device.
  • the NTN device has the functions of part or all of the access network device, and at this time, the NTN device can send the above-mentioned first system information to the terminal device.
  • the location parameter of the NTN device may include various parameters used to indicate the location of the NTN device.
  • the location parameter of the NTN device may include the location of the NTN device.
  • this application provides two implementations of representing the location of the NTN device:
  • Implementation mode 1 The position coordinates of the NTN device in the earth-centered earth-fixed (ECEF) coordinate system can be used to represent the position of the NTN device. That is, the location parameter of the NTN device may include the location of the NTN device based on ECEF.
  • ECEF earth-centered earth-fixed
  • Implementation mode 2 The position of the NTN device can be represented by using the latitude and longitude of the NTN device and the height of the NTN device. That is, the location parameter of the NTN device may include the longitude and latitude of the NTN device and the altitude of the NTN device.
  • the foregoing first system information further includes second indication information.
  • the second indication information is used to indicate that the location parameter of the NTN device includes the location of the NTN device based on ECEF; or the second indication information is used to indicate that the location parameter of the NTN device includes the latitude and longitude of the NTN device and the NTN device. the height of.
  • the height of the NTN device may be represented based on the altitude.
  • NTN devices such as LEO satellites
  • 6971km accounts for most of the earth radius (6371km)
  • so representing the height of NTN devices based on altitude can significantly reduce the bit overhead when transmitting information. .
  • the location of the ECEF-based NTN device can be selected according to different needs, or the location of the NTN device can be sent to the terminal device. latitude and longitude and altitude of the NTN device. Then, after receiving the first system information, the terminal device can determine, according to the second indication information, whether the location of the ECEF-based NTN device carried in the first system information is the latitude and longitude of the NTN device and the height of the NTN device , so that the terminal device can parse it.
  • the location parameter of the NTN device may include the location of the NTN device and motion information of the NTN device.
  • the motion information of the NTN device is used to represent the motion state of the NTN device, and may include one or more items of information such as velocity, acceleration, and derivative of the acceleration of the NTN device.
  • the terminal device can determine the location of the NTN device, the motion information of the NTN device, and the time t0 corresponding to these location parameters. Then, the terminal device can determine the position of the NTN device at other moments other than t0 according to the position of the NTN device and the motion information of the NTN device.
  • the first system information further includes the offset of the TA of the terminal device.
  • the terminal device can obtain the offset of the TA of the terminal device after receiving the system information. So that the terminal device can determine the TA when sending uplink data according to the offset.
  • the first system information further includes change information of the offset of the TA of the terminal device.
  • the offset change information may include the offset change rate and the derivative of the offset change rate, and the like.
  • LEO transparent transmission means the transparent transmission NTN system based on low earth orbit (LEO) satellites
  • LEO regeneration means the regeneration NTN system based on LEO satellites
  • GEO transparent transmission means based on Geostationary Earth Orbit (Geostationary Earth Orbit) earth orbit) satellite transparent transmission NTN system
  • HAPS transparent transmission means the transparent transmission NTN system based on HAPS equipment
  • HAPS regeneration based on the regeneration NTN system of HAPS equipment
  • ATG means the NTN system based on ATG equipment.
  • a frame structure in a predetermined format may be used to carry the first system information.
  • the frame structure includes a first field, a second field, a third field and a fourth field, which are four fields. These four fields are respectively used to carry the location of the NTN device, the motion information of the NTN device, the offset of the TA of the terminal device, and the change information of the offset.
  • the corresponding field can be set to 0 directly. (or set to other values), so that the terminal device can know that the parameter corresponding to this field is not transmitted in the system information after reading this field; it can also directly not transmit the corresponding field to save signaling overhead.
  • the field corresponding to the location of the NTN device may be set to a preset value that cannot be used, such as 0, or the variable is not transmitted. Then, when calculating the TA correlation value, the transmission delay from the platform to the UE is not considered. At this time, the terminal device can directly use the following formula 5 to calculate the TA when sending MSG1:
  • NTN NTN
  • terminal equipment usually only uses the location parameters of NTN equipment when accessing the network or performing mobility management; Therefore, if the location parameter of the NTN device is sent through the system information, the frequency of changing the system information will be greatly increased.
  • the network side will send a change instruction to the terminal device (including sending a change instruction to the terminal device through the short message or the valueTag field in SIB1), to prompt the terminal device to update the system information. In this way, after the frequency of changing the system information is increased, the frequency of updating the system information by the terminal device is increased.
  • the update period of the location parameter of the NTN device is 0.5s
  • the update period of other system information is 10s
  • the change period of the system information is 0.64s.
  • the system information will be changed once in each change cycle. content.
  • the terminal device needs to update the system information in each change cycle. In the case of no access network or mobility management, the location parameters of the NTN device updated by the terminal device are usually useless.
  • the method provided in this embodiment further includes:
  • the network device sends a short message to the terminal device.
  • the update label of the first system information in the short message remains unchanged when the location parameter of the NTN device changes. That is to say, the update label of the first system information in the short message will not change as the location parameter of the NTN device changes.
  • the update label of the first system information in the short message can be the systemInfoModification field in the Short Message; further, when the location of the NTN device When the parameter changes, the systemInfoModification field will not change with it.
  • the first system information is any one of SIB6, SIB7 or SIB8
  • the update label of the first system information in the short message may be the etwsAndCmasIndication field.
  • the location parameter of the NTN device changes, the etwsAndCmasIndication field will not change accordingly.
  • the update label of the first system information in the short message remains unchanged. In this way, the terminal device will not be informed that the SIB corresponding to the first system information has changed, and thus does not need to read the SIB.
  • the above S102 can be executed before S101, that is, the network device first sends a short message to the terminal device, so that the terminal device can determine whether the content in each SIB has changed. Then, the network device sends the first system information to the terminal device, so that the terminal device obtains the first system information.
  • the above S102 can be performed after S101, that is, the network device first sends the first system information to the terminal device, and then the network device sends the short message to the terminal device. After the terminal device decodes the short message, it can be updated according to the short message. The tag determines whether to decode the content of the first system information.
  • the valueTag field corresponding to the first system information remains unchanged when the location parameter of the NTN device changes.
  • the valueTag field corresponding to the first system information is used to indicate whether the content of the SIB corresponding to the first system information has changed. Wherein, when the content of the SIB corresponding to the first system information does not change, the valueTag field corresponding to the first system information remains unchanged.
  • each SIB except SIB1 corresponds to a valueTag field in SIB1 respectively.
  • the first system information is SIB2
  • the location parameter of the NTN device changes, the location parameter of the NTN device carried in the SIB2 will change accordingly.
  • the valueTag field corresponding to SIB2 in SIB1 will not change. In this way, the terminal device will not be informed that the SIB corresponding to the first system information has changed, and thus does not need to read the SIB.
  • a predetermined time point in the change cycle of the first system information is used to indicate the time information of the location parameter of the NTN device.
  • a predetermined time point in the change cycle of the first system information can be used as the timestamp of the location parameter of the NTN device in the first system information.
  • the first system information may include the location parameter of the NTN device at the predetermined time point in the change cycle. Then, after receiving the first system information, the terminal device can acquire the predetermined time point according to the agreement, and then the time information of the location parameter of the NTN device.
  • the change period of the first system information is m system frames. Then, the end time point t of the nth system frame of the change period of the first system information is taken as the predetermined time point. Furthermore, the method provided by this embodiment may include the following steps:
  • the network device sends first system information to the terminal device.
  • the first system information includes the location parameter of the NTN device at the end time point t0.
  • the terminal device After downlink synchronization, the terminal device can know the SFN of the signal sent by the network device, and can know the parameter configuration of modificationPeriodCoeff and defaultPagingCycle in SIB1 according to the agreed rule after deciphering SIB1.
  • the terminal device determines the position of the nth system frame of the change period, and determines the end time point t0.
  • the terminal device acquires the location parameter of the NTN device at the end time point t0 according to the first system information from the network device.
  • the terminal device calculates the distance between the NTN device and the terminal device at the time t when the uplink data is sent, and then determines the TA at the time t according to the end time point t0, the location parameter of the NTN device and the offset related parameters.
  • the predetermined time point may be the start of the change period of the system information. start time point.
  • the predetermined time point in the case where a predetermined time point in the change period of the first system information is used to indicate the time information of the location parameter of the NTN device, the predetermined time point may be the termination time of the change period of the first system information point.
  • the terminal device needs to decode the first system information to obtain the location parameter of the NTN device. If the predetermined time point is obtained before the decoding is completed, the time information of the predetermined time point needs to be cached first, and the subsequent steps (such as according to the location parameters of the NTN device, TA) is calculated based on information such as predetermined time points. Therefore, in the above implementation manner, by taking the end time point of the change period of the system information as the predetermined time point t0, the terminal device can first receive the first system information, and then determine the end time of the change period of the first system information point. In this way, the terminal device can use the time difference between receiving the first system information and determining the above-mentioned termination time point to decode the first system information, thereby improving the speed of calculating the TA.
  • the predetermined time point in the case of using a predetermined time point in the change period of the first system information to indicate the time information of the location parameter of the NTN device, the predetermined time point may be the center time of the change period of the system information point.
  • the modulus of the difference between the time t when the uplink data is sent and the predetermined time point t0 that is,
  • the modulus of the difference between the time t when the uplink data is sent and the predetermined time point t0 can be maintained. in a smaller range, thereby reducing the fitting error.
  • the predetermined time point can also be other time points in the change cycle of the system information except the start time point, the end time point and the center time point.
  • this time Applications can be unlimited.
  • the predetermined time point of the SI window that carries the first system information is used to indicate the time information of the location parameter.
  • the predetermined time point of the SI window carrying the first system information can be used as the timestamp of the location parameter of the NTN device in the first system information.
  • the first system information may include the location parameter of the NTN device at the predetermined time point. Then, after receiving the first system information, the terminal device can acquire the predetermined time point according to the agreement, and then acquire the time information of the location parameter of the NTN device.
  • the SI window that bears the SIB2 can be determined: that is, the SI window that bears the SI message where the SIB2 is located.
  • the method provided by this embodiment may include the following steps:
  • the network device sends first system information to the terminal device.
  • the first system information includes the location parameter of the NTN device that carries the preset time point t0 of the SI window of the SIB2.
  • the preset time point of the SI window that bears SIB2 may be any time point on the SI window that bears SIB2, such as the start time point, the end time point or the end time point of the SI window that bears SIB2. Any time point between the start time point and the end time point.
  • the preset time point of the SI window bearing SIB2 may be the boundary moment of the latest system frame after the SI window bearing SIB2 ends. That is, in this implementation manner, the preset time point of the SI window carrying the first system information may be the boundary time of the latest system frame after the SI window carrying the first system information ends.
  • the terminal device After downlink synchronization, the terminal device can know the SFN of the signal sent by the network device, and can know the parameter configuration of modificationPeriodCoeff and defaultPagingCycle in SIB1 according to the agreed rule after deciphering SIB1.
  • the terminal device can know the value of the number m of system frames of the modification period according to the parameter configuration of modificationPeriodCoeff and defaultPagingCycle.
  • the terminal device determines the SFN corresponding to the SI window that bears the SIB2 in the change period. Furthermore, the preset time point t0 of the SI window of the SIB2 is carried.
  • the terminal device acquires the location parameter of the NTN device at the end time point t0 according to the SIB2 from the network device.
  • the terminal device calculates the distance between the NTN device and the terminal device at the time t when the uplink data is sent, and then determines the TA at the time t according to the end time point t0, the location parameter of the NTN device and the offset related parameters.
  • the method provided in this embodiment may further include:
  • the network device sends first indication information to the terminal device.
  • the first indication information is used to indicate a reference time unit.
  • the time information of the reference time unit is the time information of the location parameter of the NTN device.
  • the reference time unit may be a system frame or a slot.
  • the first indication information may indicate a predetermined system frame. Then, the time information of the system frame is used as the time information of the location parameter of the NTN device. For example, the time point corresponding to the end boundary of the system frame is taken as the time corresponding to the location parameter of the NTN device.
  • the first indication information may indicate a predetermined slot. Then, the time information of the slot is used as the time information of the location parameter of the NTN device. For example, the time point corresponding to the end boundary of the slot is used as the time corresponding to the location parameter of the NTN device.
  • the reference time unit indicated by the first indication information may specifically be a reference time unit that has been transmitted, or a reference time unit that has not been transmitted and is about to be transmitted, which is not limited in this application.
  • the method provided in this embodiment may include the following steps:
  • the network device sends first system information to the terminal device.
  • the first system information includes the location parameter of the NTN device at the end time point t0.
  • the network device sends first indication information to the terminal device.
  • the first indication information may include the SFN of the system frame as the reference time unit.
  • the terminal device determines the location parameter of the NTN device according to the first system information.
  • the terminal device determines the system frame as the reference time unit according to the SFN of the system frame as the reference time unit, and determines the time information of the system frame. Then, the time t0 corresponding to the location parameter of the NTN device is determined.
  • the terminal device After determining the system frame as the reference time unit, the terminal device obtains the time point of the predetermined position on the system frame (that is, the time information of the system frame) according to the predetermined rule, for example, obtains the start time point of the system frame or Terminate the time point, etc., and then use the time point as the time t0 corresponding to the location parameter of the NTN device.
  • the above-mentioned predetermined rule may be a rule pre-configured by the network device to the terminal device, or the above-mentioned predetermined rule may also be acquired by the terminal device through other means.
  • this application may No restrictions.
  • the terminal device calculates the distance between the NTN device and the terminal device at the time t when the uplink data is sent according to the time t0, the location parameter of the NTN device and the offset related parameters, and then determines the TA at the time t.
  • the network device sends the first indication information to the terminal device, so that the terminal device can determine the time of the location parameter of the NTN device included in the first system information.
  • the network device sends the system information to the terminal device, there may be two ways: sending by broadcasting and sending by on-demand.
  • the network device sends system information to the terminal device according to the request of the terminal device. Because the time for sending the request is irregular, and considering the uncertainty of the resource preparation time for downlink scheduling, in the on-demand mode, it is difficult to use the system time number to indicate the time of the location parameter of the NTN device.
  • the above design is applied to the scenario of on-demand transmission, it can avoid binding the time information indicating the location parameter of the NTN device to the system time number, so that the implementation is more flexible.
  • the first indication information may be time information in SIB9. In this way, the time of the location parameter of the NTN device included in the first system information can be determined from the time information of the SIB9.
  • the network device dispatches SIB9 and the first system information to the terminal device together, so that the terminal device can determine The time of the location parameter of the NTN device included in the first system information.
  • the terminal device and/or the network device may perform some or all of the steps in the embodiments of the present application. These steps or operations are only examples. In the embodiments of the present application, other operations may also be performed or Variations of various operations. In addition, various steps may be performed in different orders presented in the embodiments of the present application, and may not be required to perform all the operations in the embodiments of the present application.
  • the embodiments provided in this application may be related to each other, and may be referred to or referenced to each other.
  • the above embodiments mainly introduce the solutions provided by the embodiments of the present application from the perspective of interaction between devices.
  • the above-mentioned terminal device or the main node or the auxiliary node includes corresponding hardware structures and/or software modules for executing each function.
  • the unit of each example described in conjunction with the embodiments disclosed herein can be implemented in hardware or in the form of a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.
  • functional modules may be divided for devices (including terminal devices or primary nodes or secondary nodes) according to the foregoing method examples.
  • each functional module may be divided corresponding to each function, or two or more functions may be divided into two or more functional modules.
  • integrated in a processing module can be implemented in the form of hardware, and can also be implemented in the form of software function modules.
  • the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and another division manner may be used in actual implementation.
  • FIG. 7 it is a schematic diagram of the composition of a communication apparatus 50 according to an embodiment of the present application.
  • the communication apparatus 50 may be a chip or a system-on-chip in a network device.
  • the communication apparatus 50 may be used to perform the functions of the network equipment involved in the above embodiments.
  • the communication device 50 includes:
  • the sending unit 501 is configured to send system information to a terminal device; wherein, the system information includes a location parameter of a non-terrestrial network NTN device, and the system information is used to indicate time information of the location parameter.
  • a predetermined time point in the change cycle of the system information is used to indicate the time information of the location parameter.
  • the predetermined time point is a start time point, or an end time point, or any one except the start time point and the end time point of the system information change cycle point in time.
  • the predetermined time point of the SI window carrying the system information is used to indicate the time information of the location parameter.
  • the predetermined time point is the boundary time of the latest system frame after the SI window carrying the system information ends.
  • the system information further includes: time information of the end position of the SI window carrying the predetermined system information block SIB; the time information of the end position of the SI window carrying the predetermined SIB is the position parameter time information.
  • the sending unit 501 is further configured to send first indication information to the terminal device, where the first indication information is specifically used to indicate a reference time unit; the time information of the reference time unit is all The time information of the location parameter; the reference time unit is a system frame or a time slot slot.
  • the sending unit 501 is further configured to send a short message short message to the terminal device; wherein the update label of the system information in the short message changes in the location parameter of the NTN device remain unchanged.
  • the valueTag field corresponding to the system information remains unchanged when the location parameter of the NTN device changes.
  • the location parameter of the NTN device includes: the location of the NTN device; or, the location parameter of the NTN device includes: the location of the NTN device and motion information of the NTN device.
  • the location parameter of the NTN device includes the location parameter of the NTN device based on the geocentric earth-fixed coordinate system ECEF.
  • the location parameter of the NTN device includes the longitude and latitude of the NTN device and the altitude of the NTN device.
  • the system information further includes: the offset amount offset of the timing advance TA of the terminal device and the change information of the offset.
  • the communication device is built in the NTN device; or the communication device is built in an access network device, and the NTN device is a relay between the access network device and the terminal device equipment.
  • FIG. 8 it is a schematic diagram of the composition of another communication apparatus 60 according to an embodiment of the present application.
  • the communication apparatus 60 may be a chip or a system-on-chip in a terminal device.
  • the communication apparatus 60 may be used to perform the functions of the terminal equipment involved in the above embodiments.
  • the communication device 60 includes:
  • the receiving unit 601 is configured to receive system information SI from a network device; wherein, the system information includes a location parameter of a non-terrestrial network NTN device, and the system information is used to indicate time information of the location parameter.
  • a predetermined time point in the change cycle of the system information is used to indicate the time information of the location parameter.
  • the predetermined time point is a start time point, or an end time point, or any one except the start time point and the end time point of the system information change cycle point in time.
  • the predetermined time point of the SI window carrying the system information is used to indicate the time information of the location parameter.
  • the predetermined time point is the boundary time of the latest system frame after the SI window carrying the location parameter of the system information ends.
  • the receiving unit 601 is further configured to receive first indication information from a network device, where the first indication information is used to indicate a reference time unit; the time information of the reference time unit is the location The time information of the parameter; the reference time unit is a system frame or a time slot slot.
  • the receiving unit 601 is further configured to receive a short message short message from the network device; wherein, the update tag of the system information in the short message occurs in the location parameter of the NTN device remain the same when changed.
  • the valueTag field corresponding to the system information remains unchanged when the location parameter of the NTN device changes.
  • the location parameter of the NTN device includes: the location of the NTN device; or, the location parameter of the NTN device includes: the location of the NTN device and motion information of the NTN device.
  • the location parameter of the NTN device includes the location parameter of the NTN device based on the geocentric earth-fixed coordinate system ECEF.
  • the location parameter of the NTN device includes the longitude and latitude of the NTN device and the altitude of the NTN device.
  • the system information further includes: the offset amount offset of the timing advance TA of the terminal device and the change information of the offset.
  • the network device is the NTN device; or the network device is an access network device, and the NTN device is a relay between the access network device and the terminal device equipment.
  • FIG. 9 shows a schematic diagram of the composition of a communication device 70 .
  • the communication device 70 includes: at least one processor 701 and at least one interface circuit 704 .
  • the communication device 70 may further include a communication line 702 and a memory 703 .
  • the processor 701 may be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more processors for controlling the execution of the programs of the present application. integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • Communication line 702 may include a path to communicate information between the aforementioned components.
  • Interface circuit 704 using any transceiver-like device, for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .
  • RAN radio access network
  • WLAN wireless local area networks
  • Memory 703 may be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types of information and instructions It can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, CD-ROM storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or capable of carrying or storing program code in the form of instructions or data structures and capable of being accessed by a computer any other medium, but not limited to.
  • the memory may exist independently and be connected to the processor through communication line 702 .
  • the memory can also be integrated with the processor.
  • the memory 703 is used for storing computer-executed instructions for executing the solution of the present application, and the execution is controlled by the processor 701 .
  • the processor 701 is configured to execute the computer-executed instructions stored in the memory 703, thereby implementing the communication method provided by the embodiment of the present application.
  • the communication apparatus 70 when the processor 701 executes the instructions stored in the memory 703, the communication apparatus 70 is caused to perform S101-S102 as shown in FIG. 6 to send short messages to the terminal device and send system information to the terminal device. , and other operations that the network device needs to perform.
  • the communication apparatus 70 when the processor 701 executes the instructions stored in the memory 703, the communication apparatus 70 is caused to execute the receiving short message from the network device and the receiving short message from the network device corresponding to S101-S102 shown in FIG. 6 . Operation of system information, and other operations that the terminal device needs to perform.
  • the computer-executed instructions in the embodiment of the present application may also be referred to as application code, which is not specifically limited in the embodiment of the present application.
  • the processor 701 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 9 .
  • the communication apparatus 70 may include multiple processors, for example, the processor 701 and the processor 707 in FIG. 9 .
  • processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.
  • a processor herein may refer to one or more devices, circuits, and/or processing cores for processing, eg, computer data (computer program instructions).
  • the communication apparatus 70 may further include an output device 705 and an input device 706 .
  • the output device 705 is in communication with the processor 701 and can display information in a variety of ways.
  • the output device 705 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait.
  • Input device 706 is in communication with processor 701 and can receive user input in a variety of ways.
  • the input device 706 may be a mouse, a keyboard, a touch screen device, a sensor device, or the like.
  • the embodiment of the present application further provides a computer-readable storage medium, where an instruction is stored in the computer-readable storage medium, and when the instruction is executed, the method provided by the embodiment of the present application is executed.
  • Embodiments of the present application also provide a computer program product including instructions. When it runs on a computer, the computer can execute the methods provided by the embodiments of the present application.
  • an embodiment of the present application further provides a chip.
  • the chip includes a processor.
  • the processor executes the computer program instructions
  • the chip can execute the method provided by the embodiments of the present application.
  • the instruction can come from memory inside the chip or from memory outside the chip.
  • the chip also includes an input and output circuit as a communication interface.
  • the functions or actions or operations or steps in the above embodiments may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • a software program When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, all or part of the processes or functions described in the embodiments of the present application are generated.
  • the computer may be a general purpose computer, special purpose computer, computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL) or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer-readable storage medium can be any available medium that can be accessed by a computer, or data storage devices including one or more servers, data centers, etc. that can be integrated with the medium.
  • the usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state disks (SSDs)), and the like.

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Abstract

本申请提供一种通信方法及装置,涉及通信技术领域。该方法用于在NTN中终端设备确定NTN设备的位置。该方法包括:网络设备向终端设备发送系统信息;其中,所述系统信息包括非地面网络NTN设备的位置参数,并且所述系统信息用于指示所述位置参数的时间信息。

Description

一种通信方法及装置
本申请要求于2020年8月7日提交国家知识产权局、申请号为202010791008.X、申请名称为“一种通信方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信技术领域,尤其涉及一种通信方法及装置。
背景技术
目前,在非地面网络(non-terrestrial-network,NTN)中,由于NTN设备的位置可以是动态变化的,这就导致终端设备与NTN设备之间的距离也随着NTN设备的位置变化而动态变化,进而终端设备的定时提前(timing advance,TA)的大小也需要动态变化。因此,在非地面网络中,如何确定TA,这是目前需要解决的问题。
发明内容
本申请实施例提供一种通信方法及装置,用于在NTN中终端设备确定NTN设备的位置。
为了达到以上目的,本申请实施例提供一下技术方案:
第一方面,提供一种通信方法,包括:网络设备向终端设备发送系统信息;其中,所述系统信息包括非地面网络NTN设备的位置参数,并且所述系统信息用于指示所述位置参数的时间信息。
本实施例中,通过网络设备向终端设备发送系统信息。由于系统信息中包括NTN设备的位置参数,并且该系统信息还指示了位置参数的时间信息。这样一来,终端设备便可以通过推算等方式,确定位置参数对应时间t0之外其他时间(如时刻t)下NTN设备的位置参数。进一步的,终端设备便可以根据时刻t下NTN设备的位置,以及终端设备自身的位置等信息,计算出在t时刻下终端设备发送上行数据的TA。
在一种可能的设计中,所述系统信息的变更周期中的预定时间点用于指示所述位置参数的时间信息。
上述设计中,考虑到可以将第一系统信息的变更周期中的预定时间点,作为第一系统信息中NTN设备的位置参数的时间戳。进而,网络设备每次向终端设备发送第一系统信息时,第一系统信息中可以包括变更周期中该预定时间点的NTN设备的位置参数。然后,终端设备在接收到第一系统信息后,便可以按照约定获取预定时间点,进而NTN设备的位置参数的时间信息。
在一种可能的设计中,所述预定时间点为所述系统信息的变更周期的起始时间点,或者终止时间点,或者除所述起始时间点和所述终止时间点外的任意一个时间点。
该实现方式中,通过将系统信息的变更周期的起始时间点作为预定时间点t0,从而保证了发送上行数据的时刻t始终大于预定时间点t0,即t-t0始终为整数,进而可以减少用于存储的符号开销。
另外,通过将系统信息的变更周期的终止时间点作为预定时间点t0,从而可以与 现有系统信息时间戳指示机制相匹配,可以减少实现过程中的开销。
在一种可能的设计中,承载所述系统信息的SI窗口的预定时间点用于指示所述位置参数的时间信息。
上述设计中,考虑到可以将承载第一系统信息的SI窗口的预定时间点,作为第一系统信息中NTN设备的位置参数的时间戳。进而,网络设备每次向终端设备发送第一系统信息时,第一系统信息中可以包括上述预定时间点的NTN设备的位置参数。然后,终端设备在接收到第一系统信息后,便可以按照约定获取该预定时间点,进而获取NTN设备的位置参数的时间信息。
在一种可能的设计中,所述预定时间点为承载所述系统信息的SI窗口结束后的最近的系统帧的边界时刻。
上述设计中,通过将承载所述系统信息的SI窗口结束后的最近的系统帧的边界时刻作为预定时间点,从而终端设备在接收到第一系统信息后,便可以按照约定获取该预定时间点,进而获取NTN设备的位置参数的时间信息。
在一种可能的设计中,所述系统信息还包括:承载预定系统信息块SIB的SI窗口结束位置的时间信息;所述承载所述预定SIB的SI窗口结束位置的时间信息为所述位置参数的时间信息。
上述设计中,通过将承载所述系统信息的SI窗口结束后的最近的系统帧的边界时刻作为预定时间点,从而终端设备在接收到第一系统信息后,便可以按照约定获取该预定时间点,进而获取NTN设备的位置参数的时间信息。
在一种可能的设计中,该所述方法还包括:所述网络设备向所述终端设备发送第一指示信息,所述第一指示信息具体用于指示参考时间单元;所述参考时间单元的时间信息为所述位置参数的时间信息;所述参考时间单元为系统帧或时隙slot。
在上述设计中,通过网络设备向终端设备发送第一指示信息的方式,可以使终端设备确定第一系统信息中所包括NTN设备的位置参数的时间。另外,考虑到网络设备向终端设备发送系统信息,可能存在两种方式:广播方式发送和On-demand方式发送。在On-demand方式下,网络设备是根据终端设备的请求,向终端设备发送系统信息的。因此在On-demand方式下,不易利用系统时间编号来指示NTN设备的位置参数的时间。当将上述设计应用到On-demand方式传输的场景下时,则可以避免指示NTN设备位置参数的时间信息与系统时间编号绑定,从而实现起来更加灵活。
在一种可能的设计中,该所述方法还包括:所述网络设备向所述终端设备发送短消息short message;其中,所述短消息中所述系统信息的更新标签在所述NTN设备的位置参数发生改变时保持不变。
在上述设计中,由于在在NTN设备的位置参数发生改变时,short message中第一系统信息的更新标签保持不变。这样一来,终端设备就不会被告知第一系统信息对应的SIB发生改变,进而无需对该SIB进行读取。
在一种可能的设计中,所述系统信息对应的valueTag字段在所述NTN设备的位置参数发生改变时保持不变。
在上述设计中,终端设备不会被告知第一系统信息对应的SIB发生改变,进而无需对该SIB进行读取。
在一种可能的设计中,所述NTN设备的位置参数包括:所述NTN设备的位置;或者,所述NTN设备的位置参数包括:所述NTN设备的位置和所述NTN设备的运动信息。
在该设计中,网络设备在将上述第一系统信息发送至终端设备后,终端设备便可以确定NTN设备的位置、NTN设备的运动信息以及这些位置参数对应的时刻t0。然后,终端设备可以根据NTN设备的位置和NTN设备的运动信息,确定t0之外的其他时刻下NTN设备的位置。
在一种可能的设计中,所述NTN设备的位置参数包括基于地心地固坐标系ECEF的NTN设备的位置参数。
在该设计中,由于基于ECEF的位置表示方法应用较广,产品开发有很多参考,因此易于实现。
在一种可能的设计中,所述NTN设备的位置参数包括所述NTN设备的经纬度和所述NTN设备的高度。
在该设计中,可以基于海拔高度来表示NTN设备的高度。其中,由于NTN设备(例如LEO卫星)的高度值,例如6971km,中占绝大部分的是地球半径(6371km),因此基于海拔高度来表示NTN设备的高度,可以显著减少传输信息时的比特开销。
在一种可能的设计中,所述系统信息中还包括:所述终端设备的定时提前TA的补偿量offset以及所述offset的变化信息。
在该设计中,终端设备可以在接收到系统信息后,获取到终端设备的TA的offset和offset的变化信息。以便终端设备根据该offset和offset的变化信息,确定发送上行数据时的TA。
在一种可能的设计中,所述网络设备为所述NTN设备;或所述网络设备为接入网设备,所述NTN设备是所述接入网设备与所述终端设备之间的中继设备。
第二方面,提供一种通信方法,包括:终端设备接收来自网络设备的系统信息SI;其中,所述系统信息包括非地面网络NTN设备的位置参数,并且所述系统信息用于指示所述位置参数的时间信息。
在一种可能的设计中,所述系统信息的变更周期中的预定时间点用于指示所述位置参数的时间信息。
在一种可能的设计中,所述预定时间点为所述系统信息的变更周期的起始时间点,或者终止时间点,或者除所述起始时间点和所述终止时间点外的任意一个时间点。
在一种可能的设计中,承载所述系统信息的SI窗口的预定时间点用于指示所述位置参数的时间信息。
在一种可能的设计中,所述预定时间点为承载上述系统信息的位置参数的SI窗口结束后的最近的系统帧的边界时刻。
在一种可能的设计中,该所述方法还包括:所述终端设备接收来自所述网络设备的第一指示信息,所述第一指示信息用于指示参考时间单元;所述参考时间单元的时间信息为所述位置参数的时间信息;所述参考时间单元为系统帧或时隙slot。
在一种可能的设计中,该方法还包括:所述终端设备接收来自所述网络设备的短消息short message;其中,所述短消息中所述系统信息的更新标签在所述NTN设备的位置参数发生改变时保持不变。
在一种可能的设计中,该系统信息对应的valueTag字段在所述NTN设备的位置参数发生改变时保持不变。
在一种可能的设计中,所述NTN设备的位置参数包括:所述NTN设备的位置;或者,所述NTN设备的位置参数包括:所述NTN设备的位置和所述NTN设备的运动信息。
在一种可能的设计中,所述NTN设备的位置参数包括基于地心地固坐标系ECEF的NTN设备的位置参数。
在一种可能的设计中,所述NTN设备的位置参数包括所述NTN设备的经纬度和所述NTN设备的高度。
在一种可能的设计中,所述系统信息中还包括:所述终端设备的定时提前TA的补偿量offset以及所述offset的变化信息。
在一种可能的设计中,所述网络设备为所述NTN设备;或所述网络设备为接入网设备,所述NTN设备是所述接入网设备与所述终端设备之间的中继设备。
第三方面,提供一种通信装置,包括:发送单元,用于向终端设备发送系统信息;其中,所述系统信息包括非地面网络NTN设备的位置参数,并且所述系统信息用于指示所述位置参数的时间信息。
在一种可能的设计中,所述系统信息的变更周期中的预定时间点用于指示所述位置参数的时间信息。
在一种可能的设计中,所述预定时间点为所述系统信息的变更周期的起始时间点,或者终止时间点,或者除所述起始时间点和所述终止时间点外的任意一个时间点。
在一种可能的设计中,承载所述系统信息的SI窗口的预定时间点用于指示所述位置参数的时间信息。
在一种可能的设计中,所述预定时间点为承载所述系统信息的SI窗口结束后的最近的系统帧的边界时刻。
在一种可能的设计中,所述系统信息还包括:承载预定系统信息块SIB的SI窗口结束位置的时间信息;所述承载所述预定SIB的SI窗口结束位置的时间信息为所述位置参数的时间信息。
在一种可能的设计中,发送单元,还用于向所述终端设备发送第一指示信息,所述第一指示信息具体用于指示参考时间单元;所述参考时间单元的时间信息为所述位置参数的时间信息;所述参考时间单元为系统帧或时隙slot。
在一种可能的设计中,发送单元,还用于向所述终端设备发送短消息shortmessage;其中,所述短消息中所述系统信息的更新标签在所述NTN设备的位置参数发生改变时保持不变。
在一种可能的设计中,所述系统信息对应的valueTag字段在所述NTN设备的位置参数发生改变时保持不变。
在一种可能的设计中,所述NTN设备的位置参数包括:所述NTN设备的位置;或者,所述NTN设备的位置参数包括:所述NTN设备的位置和所述NTN设备的运动信息。
在一种可能的设计中,所述NTN设备的位置参数包括基于地心地固坐标系ECEF的NTN设备的位置参数。
在一种可能的设计中,所述NTN设备的位置参数包括所述NTN设备的经纬度和所 述NTN设备的高度。
在一种可能的设计中,所述系统信息中还包括:所述终端设备的定时提前TA的补偿量offset以及所述offset的变化信息。
在一种可能的设计中,所述通信装置内置于所述NTN设备;或通信装置内置于接入网设备,所述NTN设备是所述接入网设备与所述终端设备之间的中继设备。
第四方面,提供一种通信装置,包括:接收单元,用于接收来自网络设备的系统信息SI;其中,所述系统信息包括非地面网络NTN设备的位置参数,并且所述系统信息用于指示所述位置参数的时间信息。
在一种可能的设计中,所述系统信息的变更周期中的预定时间点用于指示所述位置参数的时间信息。
在一种可能的设计中,所述预定时间点为所述系统信息的变更周期的起始时间点,或者终止时间点,或者除所述起始时间点和所述终止时间点外的任意一个时间点。
在一种可能的设计中,承载所述系统信息的SI窗口的预定时间点用于指示所述位置参数的时间信息。
在一种可能的设计中,所述预定时间点为承载上述系统信息的位置参数的SI窗口结束后的最近的系统帧的边界时刻。
在一种可能的设计中,接收单元,还用于接收来自网络设备的第一指示信息,所述第一指示信息用于指示参考时间单元;所述参考时间单元的时间信息为所述位置参数的时间信息;所述参考时间单元为系统帧或时隙slot。
在一种可能的设计中,接收单元,还用于接收来自所述网络设备的短消息shortmessage;其中,所述短消息中所述系统信息的更新标签在所述NTN设备的位置参数发生改变时保持不变。
在一种可能的设计中,该系统信息对应的valueTag字段在所述NTN设备的位置参数发生改变时保持不变。
在一种可能的设计中,所述NTN设备的位置参数包括:所述NTN设备的位置;或者,所述NTN设备的位置参数包括:所述NTN设备的位置和所述NTN设备的运动信息。
在一种可能的设计中,所述NTN设备的位置参数包括基于地心地固坐标系ECEF的NTN设备的位置参数。
在一种可能的设计中,所述NTN设备的位置参数包括所述NTN设备的经纬度和所述NTN设备的高度。
在一种可能的设计中,所述系统信息中还包括:所述终端设备的定时提前TA的补偿量offset以及所述offset的变化信息。
在一种可能的设计中,所述网络设备为所述NTN设备;或所述网络设备为接入网设备,所述NTN设备是所述接入网设备与所述终端设备之间的中继设备。
第五方面,提供一种通信装置,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通过所述接口电路与其它装置通信,并执行上述第一方面或第二方面所提供的方法。
第六方面,提供一种芯片,其特征在于,所述芯片包括处理器,当所述处理器执行计算机程序指令时,使得所述芯片执行上述第一方面或第二方面所提供的方法。
第七方面,提供一种计算机可读存储介质,包括:计算机软件指令;当所述计算机软件指令在数据传输装置或内置在所述数据传输装置的芯片中运行时,使得所述数据传输装置执行上述第一方面或第二方面所提供的方法。
上述第二方面至第七方面中任一种设计方法所带来的技术效果可以参见上述第一方面中不同设计方式所带来的技术效果,此处不再赘述。
附图说明
图1为本申请实施例提供的一种系统信息的变更周期的示意图;
图2为本申请实施例提供的一种NTN的系统架构图之一;
图3为本申请实施例提供的一种NTN的系统架构图之二;
图4为本申请实施例提供的一种NTN的系统架构图之三;
图5为本申请实施例提供的一种NTN的系统架构图之四;
图6为本申请实施例提供的一种通信方法的流程示意图;
图7为本申请实施例提供的一种通信装置的结构示意图之一;
图8为本申请实施例提供的一种通信装置的结构示意图之二;
图9为本申请实施例提供的一种通信装置的结构示意图之三。
具体实施方式
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行描述。为了便于清楚描述本申请实施例的技术方案,在本申请的实施例中,采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定,并且“第一”、“第二”等字样也并不限定一定不同。同时,在本申请实施例中,“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言,使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念,便于理解。
以下对本申请所涉及的相关技术进行介绍:
1、定时提前(timing advance,TA)
在移动通信网络中,一方面,若终端设备在收到了基站发送的下行数据的系统帧之后再发送上行数据的系统帧,则上行数据的系统帧到达基站的时候就会与发送的时刻存在一个时间差。另一方面,由于不同的终端设备距离基站的远近不一样,所以不同终端设备的时间差也不一样,这样不同终端设备发送的上行信息会在不同的时刻到达基站,产生干扰。
通过TA,可以使来自同一子帧的不同终端设备的信号达到基站的时间基本上是对齐的,都可以落在循环前缀(cyclic prefix,CP)范围内,从而使基站能正确接收不同终端设备所发送的上行数据。
另外,当无法准确确定TA的大小时,即TA的不确定性增大时,对物理随机接入信道(physical random access channel,PRACH)序列的要求也相应变高,具体的当TA的不确定性增大时PRACH对应的循环前缀(cyclic prefix,CP)也随之加长,从而增加了系统开销、影响整体通信质量。
2、系统信息(system information,SI)
小区搜索过程后,终端设备已经与网络侧取得下行同步,得到小区的物理小区标识(physical-layer cell identity,PCI)。接着,终端设备需要获取到小区的系统信息,这样才能知道该小区是如何配置的,以便接入该小区并在该小区内正常地工作。
目前,系统信息主要分为主信息块(master information block,MIB)和系统信息块(system information blocks,SIB)。其中,小区是通过广播控制信道(broadcast control channel,BCCH)向该小区内所有终端设备发送系统信息的。通过BCCH会将系统信息映射到传输信道广播信道(broadcast channel,BCH)和下行分享信道(downlink shared channel,DL-SCH)。其中,BCH只用于传输MIB信息,并映射到物理广播信道(physical broadcast channel,PBCH);DL-SCH用于传输各种SIB信息,并映射到物理下行分享信道(physical downlink shared channel,PDSCH)。其中,MIB用于传输终端设备接入网络的必要信息,SIBs用于传输MIB之外的系统信息。
另外,SIBs又分被分为多种类型:SIB1,SIB2……SIBX。其中,不同协议标准中,SIBs的类型个数X有所不同。
目前,系统信息的传输设计中,包括以下三方面的特性:
第一方面,除SIB1外的SIB都由无线资源控制(Radio Resource Control,RRC)的SI消息承载,并且一个SI消息包含哪些SIB是通过SIB1中的si-SchedulingInfo指定的。另外,每个SIB只能包含在一个SI消息中。
其中,除SIB1外拥有相同调度周期的一个或多个SIB可以包含在一个SI消息中进行传输。例如,若SIB2和SIB3拥有相同调度周期,则可以将SIB2和SIB3包含在一个SI消息中进行传输。
其中,一个SI消息只在一个SI窗口(SI-window)中传输。具体的,一个SI消息跟一个SI窗口相关联,该SI窗口内只能发这个SI消息并且可以重复发送多次(发多少次,在哪些slot上发送等,可根据需要设置),但不能发送其他SI消息。相邻的两个SI窗口之间是紧挨着的,既不重叠,也不会有空隙。所有SI消息的SI窗口长度都相同。不同SI消息的周期是相互独立的。每个SI消息至少包含1个SIB,相同调度周期的SIB可以在同一个SI消息中传输。
第二方面,在传输过程中,系统信息在一个变更周期(modification period)内可以传输多次,但在同一变更周期内,系统信息的内容不会发生变化。
例如,假设系统信息的变更周期为0.64s,需传输的系统信息包括SIB1、SIB2以及SIB3。则在每个变更周期(0.64s)内,SIB1、SIB2以及SIB3可以被多次发送,但一个变更周期内所发送的SIB1、SIB2以及SIB3的内容不会发生改变。
其中,系统信息的变更周期的起始系统帧满足公式:
SFN mod m=0
其中,SFN为系统帧号(system frame number);m是组成一个变更周期的系统帧数,即一个变更周期包含m个系统帧。其中:
m=modificationPeriodCoeff*defaultPagingCycle
其中,modificationPeriodCoeff是通过SIB1->ServingCellConfigCommon->DownlinkConfigCommonSIB->BCCH-Config来设置的,取值通常为:2或4或8或16。
defaultPagingCycle是通过SIB1->ServingCell
ConfigCommon->DownlinkConfigCommon->
DownlinkConfigCommonSIB->PCCH-Config->PagingCycle来配置的,取值为rf32或rf64或rf128或rf256个无线帧。通常情况下,变更周期是寻呼(Paging)周期的整数倍。
第三方面,当小区修改了一些系统信息时,网络侧会先在一个变更周期内向终端设备发送变更指示,通知终端设备系统信息将发生改变。然后在紧接着的下一个变更周期内,网络侧会发送更新后的系统信息。
例如,3GPP TS 36.331协议中5.2.1.3节所描述,在图1中,在变更周期n内,终端设备收到了变更指示,但此时的系统信息仍然是旧的系统信息,即图中系统信息1。在接下来的变更周期n+1里,网络侧开始广播新的系统信息(即图中系统信息2)。其中,系统信息3在变更周期n和变更周期n+1中没有变化,因此保持不变。
具体的,网络侧向终端设备发送变更指示的方式包括两种:
第一种,通过DCI1_0的短消息(ShortMessage)指示SI消息是否发生了变化,Short Message是通过P-RNTI加扰的PDCCH发送给UE的。
具体的,Short Message消息中包含了一个systemInfoModification字段(通知SIB1/SIB2/SIB3/SIB4/SIB5的变更)和一个etwsAndCmasIndication(通知SIB6/SIB7/SIB8的变更),如果UE接收到的Short Message包含该字段,则表示系统信息将在下一个变更周期发生变化。
第二种,系统信息中除SIB1外的每个SIB都分别对应SIB1中的一个valueTag字段,每当SIB发生变化时,对应valueTag的值会加1。
具体的,SIB1中的SI-SchedulingInfo->SchedulingInf->sib-MappingInfo包含了字段valueTag(取值范围0~31),用于指示SIB所对应的SI消息是否发生了变化。UE可以使用这个字段来检验之前保存的SI消息是否依然有效(例如从小区覆盖之外回到小区覆盖的范围内)。如果该字段发生了变化,则UE认为所保存的系统信息是无效的,需要重新读取;否则认为保存的系统信息依然有效。另外,UE会认为从接收到SI消息那一刻算起的3个小时之内,如果valueTag未变化,则所保存的系统信息是有效的。即保存的SI消息的有效期为3个小时。
3、非地面网络(non-terrestrial-network,NTN)
在地面通信网络的基础上,利用卫星或者空中飞行器(airborne/vehicles)向终端设备提供通信服务的通信网络,称为非地面网络。其中,NTN中部署在空中的卫星或空中飞行器等设备,可以称为NTN设备。例如,NTN设备可以是:卫星、高空平台(high altitude platform system,HAPS)以及空对地(Air to ground,ATG)设备中任一种。NTN包括透传和非透传(非透传也称为“再生传输”),两种传输类型。在透传NTN中,信号在NTN设备上只进行频率的转换、信号的放大等过程,即NTN设备为终端设备与接入网设备之间的中继设备。在非透传NTN中,NTN设备具有部分或全部接入网设备的功能。
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行描述:
本申请实施例提供的技术方案,可以应用于NTN中,具体可以应用于透传NTN或 者非透传NTN中。例如,图2所示为本申请所适用的一种透传NTN的系统架构示意图。其中,终端设备与NTN设备通过无线方式连接,NTN设备通过地面的网关(gateway)与接入网设备连接。接入网设备与核心网连接。
再例如,图3所示为本申请所适用的一种非透传NTN的系统架构示意图。其中,终端设备与NTN设备通过无线方式连接,NTN设备可以通过地面的网关与核心网连接。
本申请实施例中,终端设备可以是一种具有无线收发功能的设备。终端设备可以被部署在陆地上,包括室内或室外、手持或车载;也可以被部署在水面上(如轮船等);还可以被部署在空中(例如飞机、气球和卫星上等)。终端设备可以是用户设备(user equipment,UE)。其中,UE包括具有无线通信功能的手持式设备、车载设备、可穿戴设备或计算设备。示例性地,UE可以是手机(mobile phone)、平板电脑或带无线收发功能的电脑。终端设备还可以是虚拟现实(virtual reality,VR)终端设备、增强现实(augmented reality,AR)终端设备、工业控制中的无线终端、无人驾驶中的无线终端、远程医疗中的无线终端、智能电网中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请实施例中,用于实现终端设备的功能的装置可以是终端设备,也可以是能够支持终端设备实现该功能的装置,例如芯片系统。本申请实施例中,芯片系统可以由芯片构成,也可以包括芯片和其他分立器件。本申请实施例中,以用于实现终端设备的功能的装置是终端设备为例,描述本申请实施例提供的技术方案。
NTN设备可以是:卫星、高空平台(high altitude platform system,HAPS)以及空对地(Air to ground,ATG)等设备中任一种。
核心网包括多个核心网网元(或者称为网络功能网元),例如:AMF网元、会话管理功能(session management function,SMF)网元、PCF网元、用户面功能(user plane function,UPF)网元、应用层功能(application function)网元、AUSF网元、以及UDM网元。
接入网设备可以包括但不限于:无线保真(wireless fidelity,WiFi)系统中的接入点(access point,AP),如家庭网关、路由器、服务器、交换机、网桥等,演进型节点B(evolved Node B,eNB)、无线网络控制器(radio network controller,RNC)、节点B(Node B,NB)、基站控制器(base station controller,BSC)、基站收发台(base transceiver station,BTS)、家庭基站(例如,home evolved Node B,或home Node B,HNB)、基带单元(baseband unit,BBU),无线中继节点、无线回传节点、传输点(transmission and reception point,TRP或者transmission point,TP)等,还可以为5G,如,新空口(new radio,NR)系统中的gNB,或,传输点(TRP或TP),5G系统中的基站的一个或一组(包括多个天线面板)天线面板,或者,还可以为构成gNB或传输点的网络节点,如基带单元(baseband unit,BBU),或,DU、具有基站功能的路边单元(road side unit,RSU)等。
在本申请实施例中,接入网设备可以采用CU-DU架构。也即,接入网设备可以由CU和至少一个DU构成。这种情况下,接入网设备的部分功能部署在CU上,接入网设备的另一部分功能部署在DU上。CU和DU是按照协议栈进行功能切分。作为一种实现方式,CU部署有协议栈中的无线资源控制(radio Resource Control,RRC)层,PDCP 层,以及业务数据适应协议(service data adaptation protocol,SDAP)层;DU部署有协议栈中的无线链路控制(radio link control,RLC)层,媒体介入控制(media access control,MAC)层,以及物理层(physical layer,PHY)。从而,CU具有RRC、PDCP和SDAP的处理能力。DU具有RLC、MAC和PHY的处理能力。可以理解的是,上述功能的切分仅为一个示例,不构成对CU和DU的限定。也就是说,CU和DU之间还可以有其他功能切分的方式,本申请实施例在此不予赘述。
以下结合上述应用场景,对本申请实施例所提供的技术方案进行介绍:
目前,在NTN中,由于NTN设备的位置是动态变化的,这就导致终端设备与NTN设备之间的距离也随着NTN设备的位置变化而动态变化,进而终端设备的定时提前的大小也需要动态变化。
例如,在NTN中,终端设备可以利用以下方法,计算TA:
S11、终端设备获取NTN设备的位置坐标Sat_pos以及终端设备自身的位置坐标UE_pos。
S12、终端设备根据NTN设备的位置坐标Sat_pos以及终端设备自身的位置坐标UE_pos,计算终端设备发送上行数据时的TA。
另外,在计算TA时,通常还需要考虑TA的补偿量offset。其中,offset具体可以用于反映除NTN设备的位置坐标Sat_pos以及终端设备自身的位置坐标UE_pos之外,其他对TA的大小有影响的参数。
例如,offset可用于反映透传NTN中的馈线链路(feederlink)的全部或部分传输时延。示例性的,如图4所示,其中,feederlink包括显示共同定时提前(indicated common TA)和网络补偿延迟(network compensated delay),那么offset可用于表示图中feederlink的传输时延中显示共同定时提前(indicated common TA)的部分。
再例如,offset可用于反映NTN设备或终端设备定位误差。示例性的,如图5所示,其中,O表示终端设备基于定位系统确定的位置(positioning based on GNSS),O’表示NTN设备基于星历确定的位置(positioning based on ephemeris),H表示NTN设备的轨道高度(obit altitude),S表示终端设备到NTN设备的星下点的距离(distance from sub-satellite point),D表示终端设备的定位误差范围(positioning error),E表示NTN设备的定位误差范围,TA的计算距离具体可以指|Sat_pos-UE_pos|。进而,offset可以是用于反映图5中D和E的参数。
另外,还可以offset用于反映时分双工(time-division duplex,TDD)系统的定时的预偏移量N TA_offse,NTN设备与一个虚拟的坐标位置之间的距离等参数。本申请中只要offset能够用于确定终端设备的定时提前TA即可,对于offset所反映的具体内容可以不做限制。
例如,终端设备可以利用以下公式一,计算终端设备发送MSG1消息时的TA:
TA for MSG1=(||Sat_pos-UE_pos||+offset)×2/c    公式一
其中,|Sat_pos-UE_pos|表示NTN设备到终端设备的距离。Sat_pos表示NTN设备位置,其中Sat_pos可以是NTN设备的实际位置坐标。在一些场景下,Sat_pos也可以是一些虚拟参考点位置的坐标,例如,NTN设备总ATG或HAPS设备可能不愿透漏自身设备的位置,因此会向终端设备告知一个虚拟的坐标位置,通过该虚拟的坐标位 置也可以确定出NTN设备到终端设备的距离。另外,UE_pos表示终端设备的位置。
可以看出,为了计算终端设备发送上行数据时的TA,就需要获知发送上行数据时NTN设备的位置参数。
在一种实现方式中,采用通过网络设备向终端设备发送携带NTN设备位置参数的系统信息的这种方式,使终端设备获知NTN设备的位置。
但这种实现方式中,一方面,网络设备向终端设备发送的位置参数只是NTN设备在某个时刻所在位置的瞬时值。另一方面,由于系统信息存在变更周期机制,因此通过系统信息发送的位置参数,每间隔一个变更周期才能更新一次位置参数。而终端设备则需要利用发送上行数据时NTN设备的位置参数来计算TA,若利用上述系统信息中携带的位置参数来计算TA的大小,则会使TA的不确定性增大,进而影响通信质量。
例如,假设系统信息的变更周期为64个系统帧。其中,在新无线接入技术(New Radio access technology,NR)系统中,一个系统帧对应10ms,64个系统帧即0.64s。也就是说,在0.64s内网络设备只能静态告知NTN设备的位置参数。而若NTN设备以7.5km/s的速度移动,则NTN设备经过0.64s可以移动4.8km(即0.64s×7.5km/s),也就是说NTN设备的位置的误差最大可能达到4.8km,其中这个误差会导致4.8km×2的TA的不确定性,进而会增加PRACH的CP长度,并没有充分利用NTN设备和终端设备的位置来确定更加准确的TA。
另外,由于NTN设备的位置参数的更新周期可能会短于其他类型的系统信息,因此在利用网络设备向终端设备发送携带NTN设备位置参数的系统信息的这种方式时,还可能造成系统信息的频繁更新,进而导致过于频繁的SI更新提示。
为了解决上述问题,本申请中考虑到可以在网络设备将NTN设备的位置参数发送至终端设备的同时,还向终端设备告知该位置参数对应的时间信息。这样一来,终端设备在接收到NTN设备的位置参数后,便可以根据该位置参数对应的时间信息,确定该位置参数对应的时间,进而根据该位置参数对应的时间与终端设备发送上行数据的时间之间的差值,估算发送上行数据时NTN设备的位置。从而确定出更加准确的TA。
例如,网络设备向终端设备发送的位置参数,可以包括:NTN设备的位置坐标{x,y,z}、速度{Vx,Vy,Vz}、加速度{ax,ay,az}、offset的值d、offset的变化率v o、offset的变化率的导数a_d等。并且,网络设备还告知终端设备上述位置参数对应的时间t0。
那么,终端设备在获取到上述位置参数以及时间t0后,则可以通过以下公式二、公式三,计算出在发送上行数据的时刻t时,NTN设备的位置坐标Sat_pos以及offset:
Sat_pos={x,y,z}+{vx,vy,vz}×(t-t0)+{ax,ay,az}×(t-t0) 2   公式二
offset=d+v o×(t-t0)+a o×(t-t0) 2    公式三
然后,在已知NTN设备的位置坐标Sat_pos、offset,以及终端设备自身的位置坐标UE_pos的情况下,利用上述公式一便可以计算出在t时刻,终端设备发送MSG1的TA。
需要说明的是,本申请中对offset的表示方式可以不做限定。例如,上文中,offset是以距离作为量纲,进而可以利用如上述公式一的计算方式,来计算TA。当offset采用其他量纲时,则可以利用对应的计算方式,来计算TA。
例如,在一些场景下,也可以将对应的距离换算为时间,进而可以以时间作为量 纲来描述offset。具体的,当offset以时间作为量纲时,也可以利用以下公式四计算终端设备发送MSG1消息时的TA:
TAforMSG1=||Sat_pos-UE_pos||×2/c+offset    公式四
以下结合附图,对本申请实施例所提供的技术方案进行描述:
本实施例提供一种通信方法,该方法可以应用于图2或图3所示的通信系统中。如图6所示,该方法包括:
S101、网络设备向终端设备发送第一系统信息。
其中,该第一系统信息包括NTN设备的位置参数,并且该第一系统信息用于指示该位置参数的时间信息。
例如,网络设备向终端设备发送第一系统信息后,首先终端设备可以通过译码该第一系统信息确定NTN设备的位置参数,进而确定NTN设备的位置。另外,由于该第一系统信息还指示了该位置参数的时间信息,因此终端设备还可以获知上述位置参数对应的时间t0。这样一来,终端设备便可以通过推算等方式,获取t时刻下NTN设备的位置,例如可以利用上述公式二计算出t时刻下NTN设备的位置。进而,终端设备便可以根据t时刻下NTN设备的位置,以及终端设备自身的位置等信息,计算出在t时刻下终端设备发送上行数据的TA。
另外,本实施例中,用于承载NTN设备的位置参数的第一系统信息,可以包括以下三种实现方式中的任一种:
实现方式一:第一系统信息可以是SIB1。
该实现方式中,通过利用现有的SIB1来传输NTN设备的位置参数,因此无需额外增加SIB的类型,可以避免增加额外SIB相关的描述字段,简化描述信令开销。另外,由于SIB是按顺序从SIB1开始依次发送的,因此,通过利用SIB1来传输NTN设备的位置参数,还能够使终端设备能够较早获取NTN设备的位置参数。
实现方式二:第一系统信息可以是现有协议标准中定义的除SIB1之外的其他SIB,例如SIB2、SIB3等等。
该实现方式中,通过利用现有的除SIB1之外的其他SIB来传输NTN设备的位置参数,因此无需额外增加SIB的类型,可以避免增加额外SIB相关的描述字段,简化描述信令开销。并且这些SIB的信息可以在同一卫星下的不同小区(cell)之间共享。
实现方式三:第一系统信息可以是为承载NTN设备的位置参数而专门创建的SIB。
该实现方式中,通过为承载NTN设备的位置参数专门创建SIB,从而可以是消息分类更加清晰,易于开发人员在开发过程中的理解和管理。并且这个SIB的信息可以在同一卫星下的不同cell之间共享。
另外,本实施例中,网络设备可以为接入网设备。
例如,在图2所示通信系统中,NTN设备是接入网设备与终端设备之间的中继设备。此时可以由接入网设备将通过NTN设备向终端设备发送上述第一系统信息。
另外,网络设备可以为NTN设备。
例如,在图2所示通信系统中,NTN设备在接收到来自接入网设备的上述第一系统信息后,可以将该第一系统信息发送至终端设备。再例如,在图3所示通信系统中,NTN设备具有部分或全部接入网设备的功能,此时可以由NTN设备向终端设备发送上 述第一系统信息。
其中,NTN设备的位置参数,可以包括用于指示NTN设备位置的各种参数。
一种可能的设计中,NTN设备的位置参数可以包括NTN设备的位置。
其中,本申请中提供了两种表示NTN设备的位置的实现方式:
实现方式一:可以利用NTN设备在地心地固坐标系(earth-centered earth-fixed,ECEF)中的位置坐标,来表示NTN设备的位置。也就是说,NTN设备的位置参数,可以包括基于ECEF的NTN设备的位置。
实现方式二:可以利用NTN设备的经纬度和NTN设备的高度,来表示NTN设备的位置。也就是说,NTN设备的位置参数,可以包括所述NTN设备的经纬度和所述NTN设备的高度。
在一种实现方式中,上述第一系统信息中还包括第二指示信息。其中,第二指示信息用于指示NTN设备的位置参数中包括基于ECEF的NTN设备的位置;或者第二指示信息用于指示NTN设备的位置参数中包括所述NTN设备的经纬度和所述NTN设备的高度。
其中,上述实现方式中,考虑到在上述实现方式一所提供的表示方法中,由于基于ECEF的位置表示方法应用较广,产品开发有很多参考,因此易于实现。在上述实现方式二所提供的表示方法中,可以基于海拔高度来表示NTN设备的高度。其中,由于NTN设备(例如LEO卫星)的高度值,例如6971km,中占绝大部分的是地球半径(6371km),因此基于海拔高度来表示NTN设备的高度,可以显著减少传输信息时的比特开销。因此,通过在第一系统信息中增加第二指示信息,从而可以在网络设备向终端设备发送NTN设备的位置参数中,根据不同需要选择发送基于ECEF的NTN设备的位置,或者发送所述NTN设备的经纬度和所述NTN设备的高度。然后,终端设备在接收到第一系统信息后,根据第二指示信息,可以确定第一系统信息中所携带的是基于ECEF的NTN设备的位置,还是NTN设备的经纬度和所述NTN设备的高度,以便终端设备进行解析。
进一步的,在一种实现方式中,NTN设备的位置参数可以包括NTN设备的位置和NTN设备的运动信息。其中,NTN设备的运动信息,用于表征NTN设备的运动状态,可以包括NTN设备的速度、加速度、加速度的导数等信息中的一项或多项。
在该设计中,网络设备在将上述第一系统信息发送至终端设备后,终端设备便可以确定NTN设备的位置、NTN设备的运动信息以及这些位置参数对应的时刻t0。然后,终端设备可以根据NTN设备的位置和NTN设备的运动信息,确定t0之外的其他时刻下NTN设备的位置。
在一种可能的设计中,第一系统信息还包括终端设备的TA的offset。
在该设计中,终端设备可以在接收到系统信息后,获取到终端设备的TA的offset。以便终端设备根据该offset,确定发送上行数据时的TA。
另外,在一种实现方式中,第一系统信息还包括终端设备的TA的offset的变化信息。
例如,offset的变化信息可以包括offset的变化率以及offset的变化率的导数等。
在一种可能的设计中,考虑到在不同的NTN系统中,终端设备确定TA时所使用的 参数有所不同。例如,下表1示出了六种不同NTN系统中终端设备确定TA时所使用的参数:
表1
Figure PCTCN2021111034-appb-000001
其中,“LEO透传”表示基于低轨(low earth orbit,LEO)卫星的透传NTN系统,“LEO再生”表示基于LEO卫星的再生NTN系统,“GEO透传”表示基于同步地球轨道(Geostationary earth orbit)卫星的透传NTN系统,“HAPS透传”表示基于HAPS设备的透传NTN系统,“HAPS再生”基于HAPS设备的再生NTN系统,“ATG”表示基于ATG设备的NTN系统。
由表1可以看出,在不同的NTN系统中,终端设备确定TA时所使用的参数有所不同。
因此,本实施例所提供方法中,可以采用预定格式的帧结构用于承载第一系统信息。其中,该帧结构中包括第一字段、第二字段、第三字段以及第四字段,四个字段。这四个字段分别用于承载NTN设备的位置、NTN设备的运动信息、终端设备的TA的offset以及offset的变化信息。
例如,当在一些场景中,如果不需要NTN设备的位置、NTN设备的运动信息、终端设备的TA的offset以及offset的变化信息中的一项或多项时,可以直接将对应字段设为0(或者设为其他值),这样终端设备在读取到该字段后便可以获知该系统信息中没有传输该字段对应的参数;也可以直接不传输对应字段,以便节省信令开销。
示例性的,如果不需要NTN设备的位置,可以将NTN设备的位置对应的字段设为一个不可能用到预设值,例如0,或者不传输该变量。那么在计算TA相关值时,不考虑平台到UE的传输时延。此时,终端设备可以直接利用以下公式五,计算发送MSG1时的TA:
TA for MSG1=offset×2/c公式五
另外,考虑到一方面在NTN中,终端设备通常只在接入网络时或者进行移动性管理时才用到NTN设备的位置参数;另一方面,NTN设备的位置参数的更新周期较其他系统信息的更新周期更短,因此,若通过系统信息来发送NTN设备的位置参数,则会大幅提高系统信息的变更频率。另外,由上文相关技术介绍可知,系统信息每次变更系统信息的内容时,网络侧会向终端设备发送变更指示(包括通过short message或 通过SIB1中的valueTag字段向终端设备发送变更指示),以提示终端设备更新系统信息。这样一来,在系统信息的变更频率提高后,就会导致终端设备更新系统信息的频率提高。
示例性的,假设NTN设备的位置参数的更新周期为0.5s,其他系统信息的更新周期为10s,系统信息的变更周期为0.64s。那么,可以看出,在不通过系统信息发送NTN设备的位置参数的情况下,一般每经过15-16个变更周期(10s/0.64s=15.625),变更一次系统信息的内容。而在通过系统信息发送NTN设备的位置参数的情况下,则因为NTN设备的位置参数的更新周期小于系统信息的变更周期(0.5s<0.64s),所以每个变更周期都会变更一次系统信息的内容。进而,终端设备就需要在每个变更周期更新系统信息。而在不进行接入网络或移动性管理的情况下,终端设备更新的NTN设备的位置参数通常是没用的。
因此,在一种可能的设计中,本实施例所提供方法,还包括:
S102、网络设备向终端设备发送short message。
其中,short message中第一系统信息的更新标签在NTN设备的位置参数发生改变时保持不变。也就是说,short message中第一系统信息的更新标签不会随着NTN设备的位置参数发生改变而改变。
例如,当第一系统信息是SIB1、SIB2、SIB3、SIB4或SIB5中任一项时,short message中第一系统信息的更新标签,可以为Short Message中的systemInfoModification字段;进而,当NTN设备的位置参数发生改变时,systemInfoModification字段不会随着改变。再例如,当第一系统信息是SIB6、SIB7或SIB8中任一项时,short message中第一系统信息的更新标签,可以为etwsAndCmasIndication字段。进而,当NTN设备的位置参数发生改变时,etwsAndCmasIndication字段不会随着改变。
在上述设计中,由于在在NTN设备的位置参数发生改变时,short message中第一系统信息的更新标签保持不变。这样一来,终端设备就不会被告知第一系统信息对应的SIB发生改变,进而无需对该SIB进行读取。
需要说明的是,在具体实现过程中,如图6所示,上述S102可以在S101之前执行,即网络设备先向终端设备发送short message,以便终端设备确定各SIB中的内容是否发生改变。然后网络设备再向终端设备发送第一系统信息,以便终端设备获取第一系统信息。另外,上述S102可以在S101之后执行,即网络设备先向终端设备发送第一系统信息,然后网络设备再向终端设备发送short message,终端设备在译码short message后,可以根据short message中的更新标签确定是否对第一系统信息的内容进行译码。
在另一种可能的设计中,本实施例中,第一系统信息对应的valueTag字段在NTN设备的位置参数发生改变时保持不变。
其中,第一系统信息对应的valueTag字段用于指示第一系统信息对应的SIB的内容是否发生改变。其中,当第一系统信息对应的SIB的内容没有发生改变时,第一系统信息对应的valueTag字段保持不变。
例如,由上文相关技术的介绍中可知除SIB1外的每个SIB都分别对应SIB1中的 一个valueTag字段。假设第一系统信息为SIB2,那么当NTN设备的位置参数发生改变时,则SIB2中所承载的NTN设备的位置参数就会随之改变。另外,SIB1中SIB2对应的valueTag字段则不会改变。这样一来,终端设备就不会被告知第一系统信息对应的SIB发生改变,进而无需对该SIB进行读取。
另外,在一种可能的设计中,本实施例中,第一系统信息的变更周期中的预定时间点用于指示NTN设备的位置参数的时间信息。
上述设计中,考虑到可以将第一系统信息的变更周期中的预定时间点,作为第一系统信息中NTN设备的位置参数的时间戳。进而,网络设备每次向终端设备发送第一系统信息时,第一系统信息中可以包括变更周期中该预定时间点的NTN设备的位置参数。然后,终端设备在接收到第一系统信息后,便可以按照约定获取预定时间点,进而NTN设备的位置参数的时间信息。
例如,假设第一系统信息的变更周期为m个系统帧。然后将第一系统信息的变更周期的第n个系统帧的结束时间点t,作为预定时间点。进而,本实施例所提供的方法,可以包括以下步骤:
S201、网络设备向终端设备发送第一系统信息。其中第一系统信息中包括上述结束时间点t0的NTN设备的位置参数。
S202、终端设备在下行同步后,可以知道网络设备发送信号的SFN,并且在解SIB1后根据约定规则可以知道SIB1中的modificationPeriodCoeff和defaultPagingCycle参数配置。
S203、终端设备根据modificationPeriodCoeff和defaultPagingCycle参数配置,便可以知道m的取值。并且,终端设备根据SFNmodm=0,便可以找到变更周期的起点和终点。
S204、终端设备确定变更周期的第n个系统帧的位置,并确定结束时间点t0。
S205、终端设备根据来自网络设备的第一系统信息,获取结束时间点t0的NTN设备的位置参数。
S206、终端设备根据结束时间点t0、NTN设备的位置参数以及offset相关参数,计算发送上行数据的时刻t下,NTN设备与终端设备的距离,进而确定时刻t的TA。
另外,在一种实现方式中,在利用第一系统信息的变更周期中的预定时间点指示NTN设备的位置参数的时间信息的情况下,预定时间点可以为所述系统信息的变更周期的起始时间点。
该实现方式中,通过将系统信息的变更周期的起始时间点作为预定时间点t0,从而保证了发送上行数据的时刻t始终大于预定时间点t0,即t-t0始终为正数,进而可以减少用于存储的符号开销。
在另一种实现方式中,在利用第一系统信息的变更周期中的预定时间点指示NTN设备的位置参数的时间信息的情况下,预定时间点可以为第一系统信息的变更周期的终止时间点。
考虑到,终端设备在接收来自网络设备的第一系统信息的过程中,需要对第一系统信息进行译码得到NTN设备的位置参数。若在译码完成之前获取到预定时间点,则需要先将预定时间点的时间信息缓存下来,等待对第一系统信息的译码完成后,才能 进行后续步骤(如根据NTN设备的位置参数、预定时间点等信息计算TA)。因此,上述实现方式中,通过将系统信息的变更周期的终止时间点作为预定时间点t0,从而可以使终端设备先接收到第一系统信息,然后再确定第一系统信息的变更周期的终止时间点。这样一来,终端设备可以利用接收到第一系统信息与确定上述终止时间点之间的时间差,来对第一系统信息进行译码,从而提高了计算TA的速度。
在又一种实现方式中,在利用第一系统信息的变更周期中的预定时间点指示NTN设备的位置参数的时间信息的情况下,预定时间点可以为所述系统信息的变更周期的中心时间点。
该实现方式中,通过将系统信息的变更周期的中心时间点作为预定时间点t0,从而可以使发送上行数据的时刻t与预定时间点t0的差值的模(即|t-t0|)保持在较小范围,从而降低拟合误差。
另外,本设计中,预定时间点也可以为系统信息的变更周期中除起始时间点、终止时间点和中心时间点之外的其他时间点,对于预定时间点在变更周期中的位置,本申请可以不做限制。
在另一种可能的设计中,本实施例中,承载所述第一系统信息的SI窗口的预定时间点用于指示所述位置参数的时间信息。
上述设计中,考虑到可以将承载第一系统信息的SI窗口的预定时间点,作为第一系统信息中NTN设备的位置参数的时间戳。进而,网络设备每次向终端设备发送第一系统信息时,第一系统信息中可以包括上述预定时间点的NTN设备的位置参数。然后,终端设备在接收到第一系统信息后,便可以按照约定获取该预定时间点,进而获取NTN设备的位置参数的时间信息。
例如,假设第一系统信息是SIB2,那么承载SIB2的SI窗口便可以确定:即承载SIB2所在SI消息的SI窗口。进而,本实施例所提供的方法,可以包括以下步骤:
S301、网络设备向终端设备发送第一系统信息。其中第一系统信息中包括承载SIB2的SI窗口的预设时间点t0的NTN设备的位置参数。
其中,在一种实现方式中,承载SIB2的SI窗口的预设时间点,可以是承载SIB2的SI窗口上的任一时间点,例如承载SIB2的SI窗口的起始时间点、终止时间点或起始时间点和终止时间点之间的任一个时间点。
其中,在另一种实现方式中,承载SIB2的SI窗口的预设时间点,可以是承载SIB2的SI窗口结束后的最近的系统帧的边界时刻。也就是说,本实现方式中,承载第一系统信息的SI窗口的预设时间点,可以承载第一系统信息的SI窗口结束后的最近的系统帧的边界时刻。
S302、终端设备在下行同步后,可以知道网络设备发送信号的SFN,并且在解SIB1后根据约定规则可以知道SIB1中的modificationPeriodCoeff和defaultPagingCycle参数配置。
S303、终端设备根据modificationPeriodCoeff和defaultPagingCycle参数配置,便可以知道变更周期的系统帧个数m的取值。
S304、终端设备确定变更周期中承载SIB2的SI窗口所对应的SFN。进而承载SIB2的SI窗口的预设时间点t0。
S305、终端设备根据来自网络设备的SIB2,获取结束时间点t0的NTN设备的位置参数。
S306、终端设备根据结束时间点t0、NTN设备的位置参数以及offset相关参数,计算发送上行数据的时刻t下,NTN设备与终端设备的距离,进而确定时刻t的TA。
在又一种可能的设计中,本实施例所提供方法还可以包括:
S103、网络设备向所述终端设备发送第一指示信息。
其中,第一指示信息用于指示参考时间单元。其中,参考时间单元的时间信息为NTN设备的位置参数的时间信息。其中,参考时间单元可以为系统帧或slot。
例如,第一指示信息,可以指示预定的一个系统帧。则将该系统帧的时间信息作为NTN设备的位置参数的时间信息。例如,将该系统帧的结束边界对应的时间点,作为NTN设备的位置参数对应的时间。
再例如,第一指示信息,可以指示预定的一个slot。则将该slot的时间信息作为NTN设备的位置参数的时间信息。例如,将该slot的结束边界对应的时间点,作为NTN设备的位置参数对应的时间。
其中,第一指示信息所指示的参考时间单元,具体可以是已经传输过的参考时间单元,也可以是还未传输并即将传输的参考时间单元,对此本申请可以不做限制。
示例性的,以参考时间单元为系统帧为例,本实施例所提供的方法,可以包括以下步骤:
S401、网络设备向终端设备发送第一系统信息。其中第一系统信息中包括上述结束时间点t0的NTN设备的位置参数。
S402、网络设备向所述终端设备发送第一指示信息。
其中,第一指示信息中可以包括作为参考时间单元的系统帧的SFN。
S403、终端设备根据第一系统信息,确定NTN设备的位置参数。
S404、终端设备根据作为参考时间单元的系统帧的SFN,确定作为参考时间单元的系统帧,并确定该系统帧的时间信息。进而确定NTN设备的位置参数对应的时间t0。
例如,终端设备在确定作为参考时间单元的系统帧后,根据预定的规则,获取该系统帧上预定位置的时间点(即该系统帧的时间信息),例如获取该系统帧的开始时间点或终止时间点等,然后将该时间点作为NTN设备的位置参数对应的时间t0。其中,上述预定的规则,可以是由网络设备预先向终端设备配置的规则,或者上述预定的规则,也可以是终端设备通过其他方式获取的,对于预定的规则的内容以及获取方式,本申请可以不做限制。
S405、终端设备根据时间t0、NTN设备的位置参数以及offset相关参数,计算发送上行数据的时刻t下,NTN设备与终端设备的距离,进而确定时刻t的TA。
在上述设计中,通过网络设备向终端设备发送第一指示信息的方式,可以使终端设备确定第一系统信息中所包括NTN设备的位置参数的时间。另外,考虑到网络设备向终端设备发送系统信息,可能存在两种方式:广播方式发送和On-demand方式发送。在On-demand方式下,网络设备是根据终端设备的请求,向终端设备发送系统信息的。因为发送请求的时间没有规律,考虑到下行调度的资源准备的时间有不确定性,因此在On-demand方式下,不易利用系统时间编号来指示NTN设备的位置参数的时间。当 将上述设计应用到On-demand方式传输的场景下时,则可以避免指示NTN设备位置参数的时间信息与系统时间编号绑定,从而实现起来更加灵活。
在一种实现方式中,在网络设备与终端设备之间的系统信息包含SIB9的情况下,第一指示信息,可以为SIB9中time信息。这样一来,便可以从SIB9的time信息中,确定出第一系统信息中所包括NTN设备的位置参数的时间。
例如,在采用On-demand方式传输第一系统信息的场景下,当终端设备申请网络设备发送第一系统信息时,网络设备一并调度SIB9和第一系统信息给终端设备,从而使终端设备确定第一系统信息中所包括NTN设备的位置参数的时间。
可以理解的,本申请实施例中,终端设备和/或网络设备可以执行本申请实施例中的部分或全部步骤,这些步骤或操作仅是示例,本申请实施例中,还可以执行其它操作或者各种操作的变形。此外,各个步骤可以按照本申请实施例呈现的不同的顺序来执行,并且有可能并非要执行本申请实施例中的全部操作。本申请提供的实施例之间是可以关联的,并且可以相互参考或引用。
以上实施例主要从设备之间交互的角度对本申请实施例提供的方案进行了介绍。应理解,上述终端设备或主节点或辅节点为了实现对应的功能,其包括了执行各功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到,结合本文中所公开的实施例描述的各示例的单元,本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对设备(包括终端设备或主节点或辅节点)进行功能模块的划分,例如,可以对应各个功能划分各个功能模块,也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。可选的,本申请实施例中对模块的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。
如图7所示,为本申请实施例提供的一种通信装置50的组成示意图。通信装置50可以是网络设备中的芯片或片上系统。该通信装置50可以用于执行上述实施例中涉及的网络设备的功能。作为一种可实现方式,该通信装置50包括:
发送单元501,用于向终端设备发送系统信息;其中,所述系统信息包括非地面网络NTN设备的位置参数,并且所述系统信息用于指示所述位置参数的时间信息。
在一种可能的设计中,所述系统信息的变更周期中的预定时间点用于指示所述位置参数的时间信息。
在一种可能的设计中,所述预定时间点为所述系统信息的变更周期的起始时间点,或者终止时间点,或者除所述起始时间点和所述终止时间点外的任意一个时间点。
在一种可能的设计中,承载所述系统信息的SI窗口的预定时间点用于指示所述位置参数的时间信息。
在一种可能的设计中,所述预定时间点为承载所述系统信息的SI窗口结束后的最近的系统帧的边界时刻。
在一种可能的设计中,所述系统信息还包括:承载预定系统信息块SIB的SI窗口 结束位置的时间信息;所述承载所述预定SIB的SI窗口结束位置的时间信息为所述位置参数的时间信息。
在一种可能的设计中,发送单元501,还用于向所述终端设备发送第一指示信息,所述第一指示信息具体用于指示参考时间单元;所述参考时间单元的时间信息为所述位置参数的时间信息;所述参考时间单元为系统帧或时隙slot。
在一种可能的设计中,发送单元501,还用于向所述终端设备发送短消息short message;其中,所述短消息中所述系统信息的更新标签在所述NTN设备的位置参数发生改变时保持不变。
在一种可能的设计中,所述系统信息对应的valueTag字段在所述NTN设备的位置参数发生改变时保持不变。
在一种可能的设计中,所述NTN设备的位置参数包括:所述NTN设备的位置;或者,所述NTN设备的位置参数包括:所述NTN设备的位置和所述NTN设备的运动信息。
在一种可能的设计中,所述NTN设备的位置参数包括基于地心地固坐标系ECEF的NTN设备的位置参数。
在一种可能的设计中,所述NTN设备的位置参数包括所述NTN设备的经纬度和所述NTN设备的高度。
在一种可能的设计中,所述系统信息中还包括:所述终端设备的定时提前TA的补偿量offset以及所述offset的变化信息。
在一种可能的设计中,所述通信装置内置于所述NTN设备;或通信装置内置于接入网设备,所述NTN设备是所述接入网设备与所述终端设备之间的中继设备。
如图8所示,为本申请实施例提供的另一种通信装置60的组成示意图。该通信装置60可以是终端设备中的芯片或片上系统。该通信装置60可以用于执行上述实施例中涉及的终端设备的功能。作为一种可实现方式,该通信装置60包括:
接收单元601,用于接收来自网络设备的系统信息SI;其中,所述系统信息包括非地面网络NTN设备的位置参数,并且所述系统信息用于指示所述位置参数的时间信息。
在一种可能的设计中,所述系统信息的变更周期中的预定时间点用于指示所述位置参数的时间信息。
在一种可能的设计中,所述预定时间点为所述系统信息的变更周期的起始时间点,或者终止时间点,或者除所述起始时间点和所述终止时间点外的任意一个时间点。
在一种可能的设计中,承载所述系统信息的SI窗口的预定时间点用于指示所述位置参数的时间信息。
在一种可能的设计中,所述预定时间点为承载上述系统信息的位置参数的SI窗口结束后的最近的系统帧的边界时刻。
在一种可能的设计中,接收单元601,还用于接收来自网络设备的第一指示信息,所述第一指示信息用于指示参考时间单元;所述参考时间单元的时间信息为所述位置参数的时间信息;所述参考时间单元为系统帧或时隙slot。
在一种可能的设计中,接收单元601,还用于接收来自所述网络设备的短消息short message;其中,所述短消息中所述系统信息的更新标签在所述NTN设备的位置 参数发生改变时保持不变。
在一种可能的设计中,该系统信息对应的valueTag字段在所述NTN设备的位置参数发生改变时保持不变。
在一种可能的设计中,所述NTN设备的位置参数包括:所述NTN设备的位置;或者,所述NTN设备的位置参数包括:所述NTN设备的位置和所述NTN设备的运动信息。
在一种可能的设计中,所述NTN设备的位置参数包括基于地心地固坐标系ECEF的NTN设备的位置参数。
在一种可能的设计中,所述NTN设备的位置参数包括所述NTN设备的经纬度和所述NTN设备的高度。
在一种可能的设计中,所述系统信息中还包括:所述终端设备的定时提前TA的补偿量offset以及所述offset的变化信息。
在一种可能的设计中,所述网络设备为所述NTN设备;或所述网络设备为接入网设备,所述NTN设备是所述接入网设备与所述终端设备之间的中继设备。
如图9示出了一种通信装置70的组成示意图。其中,通信装置70包括:至少一个处理器701,以及至少一个接口电路704。另外,该通信装置70还可以包括通信线路702,存储器703。
处理器701可以是一个通用中央处理器(central processing unit,CPU),微处理器,特定应用集成电路(application-specific integrated circuit,ASIC),或一个或多个用于控制本申请方案程序执行的集成电路。
通信线路702可包括一通路,在上述组件之间传送信息。
接口电路704,使用任何收发器一类的装置,用于与其他设备或通信网络通信,如以太网,无线接入网(radio access network,RAN),无线局域网(wireless local area networks,WLAN)等。
存储器703可以是只读存储器(read-only memory,ROM)或可存储静态信息和指令的其他类型的静态存储设备,随机存取存储器(random access memory,RAM)或者可存储信息和指令的其他类型的动态存储设备,也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory,EEPROM)、只读光盘(compact disc read-only memory,CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的程序代码并能够由计算机存取的任何其他介质,但不限于此。存储器可以是独立存在,通过通信线路702与处理器相连接。存储器也可以和处理器集成在一起。
其中,存储器703用于存储执行本申请方案的计算机执行指令,并由处理器701来控制执行。处理器701用于执行存储器703中存储的计算机执行指令,从而实现本申请实施例提供的通信方法。
示例性地,在一些实施例中,当处理器701执行存储器703存储的指令时,使得该通信装置70执行如图6所示的S101-S102向终端设备发送short message和向终端设备发送系统信息的操作,以及网络设备需要执行的其他操作。
在另一些实施例中,当处理器701执行存储器703存储的指令时,使得该通信装 置70执行如与图6所示的S101-S102对应的接收来自网络设备的short message和接收来自网络设备的系统信息的操作,以及终端设备需要执行的其他操作。
可选的,本申请实施例中的计算机执行指令也可以称之为应用程序代码,本申请实施例对此不作具体限定。
在具体实现中,作为一种实施例,处理器701可以包括一个或多个CPU,例如图9中的CPU0和CPU1。
在具体实现中,作为一种实施例,通信装置70可以包括多个处理器,例如图9中的处理器701和处理器707。这些处理器中的每一个可以是一个单核(single-CPU)处理器,也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理例如计数据(算机程序指令)的处理核。
在具体实现中,作为一种实施例,通信装置70还可以包括输出设备705和输入设备706。输出设备705和处理器701通信,可以以多种方式来显示信息。例如,输出设备705可以是液晶显示器(liquid crystal display,LCD),发光二级管(light emitting diode,LED)显示设备,阴极射线管(cathode ray tube,CRT)显示设备,或投影仪(projector)等。输入设备706和处理器701通信,可以以多种方式接收用户的输入。例如,输入设备706可以是鼠标、键盘、触摸屏设备或传感设备等。
本申请实施例还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指令,当该指令运行时,执行本申请实施例所提供的方法。
本申请实施例还提供一种包含指令的计算机程序产品。当其在计算机上运行时,使得计算机可以执行本申请实施例所提供的方法。
另外,本申请实施例还提供一种芯片。该芯片包括处理器。当处理器执行计算机程序指令时,使得芯片可以执行本申请实施例提供的方法。该指令可以来自芯片内部的存储器,也可以来自芯片外部的存储器。可选的,该芯片还包括作为通信接口的输入输出电路。
在上述实施例中的功能或动作或操作或步骤等,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时,可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述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,所述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line,DSL))或无线(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。所述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括一个或多个可以用介质集成的服务器、数据中心等数据存储设备。所述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(例如固态硬盘(solid state disk,SSD))等。
尽管结合具体特征及其实施例对本申请进行了描述,显而易见的,在不脱离本申请的精神和范围的情况下,可对其进行各种修改和组合。相应地,本说明书和附图仅 仅是所附权利要求所界定的本申请的示例性说明,且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然,本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样,倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本申请也意图包括这些改动和变型在内。

Claims (60)

  1. 一种通信方法,其特征在于,包括:
    网络设备确定系统消息SI;其中,所述系统信息包括非地面网络NTN设备的位置参数,并且所述系统信息用于指示所述位置参数的时间信息;
    向终端设备发送所述系统信息;。
  2. 根据权利要求1所述的方法,其特征在于,所述系统信息的变更周期中的预定时间点用于指示所述位置参数的时间信息。
  3. 根据权利要求2所述的方法,其特征在于,所述预定时间点为所述系统信息的变更周期的起始时间点,或者终止时间点。
  4. 根据权利要求1所述的方法,其特征在于,承载所述系统信息的SI窗口的预定时间点用于指示所述位置参数的时间信息。
  5. 根据权利要求4所述的方法,其特征在于,所述预定时间点为承载所述系统信息的SI窗口结束后的最近的系统帧的边界时刻。
  6. 根据权利要求1所述的方法,其特征在于,所述方法还包括:所述网络设备向所述终端设备发送第一指示信息,所述第一指示信息用于指示参考时间单元;所述参考时间单元的时间信息为所述位置参数的时间信息;所述参考时间单元为系统帧或时隙slot。
  7. 根据权利要求1-6任一项所述的方法,其特征在于,所述方法还包括:
    所述网络设备向所述终端设备发送短消息short message;其中,所述短消息中所述系统信息的更新标签在所述NTN设备的位置参数发生改变时保持不变。
  8. 根据权利要求1-7任一项所述的方法,其特征在于,
    所述系统信息对应的valueTag字段在所述NTN设备的位置参数发生改变时保持不变。
  9. 根据权利要求1-8任一项所述的方法,其特征在于,所述NTN设备的位置参数包括:所述NTN设备的位置;或者,所述NTN设备的位置参数包括:所述NTN设备的位置和所述NTN设备的运动信息。
  10. 根据权利要求1-9任一项所述的方法,其特征在于,所述NTN设备的位置参数包括基于地心地固坐标系ECEF的NTN设备的位置参数。
  11. 根据权利要求1-9任一项所述的方法,其特征在于,所述NTN设备的位置参数包括所述NTN设备的经纬度和所述NTN设备的高度。
  12. 根据权利要求1-11任一项所述的方法,其特征在于,所述系统信息中还包括:所述终端设备的定时提前TA的补偿量offset以及所述offset的变化信息。
  13. 根据权利要求1-12任一项所述的方法,其特征在于,所述网络设备为所述NTN设备;或所述网络设备为接入网设备,所述NTN设备是所述接入网设备与所述终端设备之间的中继设备。
  14. 一种通信方法,其特征在于,包括:
    终端设备接收来自网络设备的系统信息SI;其中,所述系统信息包括非地面网络NTN设备的位置参数,并且所述系统信息用于指示所述位置参数的时间信息。
  15. 根据权利要求14所述的方法,其特征在于,所述方法还包括:
    所述终端设备根据所述NTN设备的位置参数和所述位置参数的时间信息确定所述终端设备发送上行数据的定时提前。
  16. 根据权利要求14或15所述的方法,其特征在于,所述系统信息的变更周期中的预定时间点用于指示所述位置参数的时间信息。
  17. 根据权利要求16所述的方法,其特征在于,所述预定时间点为所述系统信息的变更周期的起始时间点,或者终止时间点。
  18. 根据权利要求14所述的方法,其特征在于,承载所述系统信息的SI窗口的预定时间点用于指示所述位置参数的时间信息。
  19. 根据权利要求18所述的方法,其特征在于,所述预定时间点为承载上述系统信息的位置参数的SI窗口结束后的最近的系统帧的边界时刻。
  20. 根据权利要求14所述的方法,其特征在于,所述方法还包括:所述终端设备接收来自所述网络设备的第一指示信息,所述第一指示信息用于指示参考时间单元;所述参考时间单元的时间信息为所述位置参数的时间信息;所述参考时间单元为系统帧或时隙slot。
  21. 根据权利要求14-20任一项所述的方法,其特征在于,所述方法还包括:
    所述终端设备接收来自所述网络设备的短消息short message;其中,所述短消息中所述系统信息的更新标签在所述NTN设备的位置参数发生改变时保持不变。
  22. 根据权利要求14-21任一项所述的方法,其特征在于,所述系统信息对应的valueTag字段在所述NTN设备的位置参数发生改变时保持不变。
  23. 根据权利要求14-22任一项所述的方法,其特征在于,所述NTN设备的位置参数包括:所述NTN设备的位置;或者,所述NTN设备的位置参数包括:所述NTN设备的位置和所述NTN设备的运动信息。
  24. 根据权利要求14-23任一项所述的方法,其特征在于,所述NTN设备的位置参数包括基于地心地固坐标系ECEF的NTN设备的位置参数。
  25. 根据权利要求14-23任一项所述的方法,其特征在于,所述NTN设备的位置参数包括所述NTN设备的经纬度和所述NTN设备的高度。
  26. 根据权利要求14-25任一项所述的方法,其特征在于,所述系统信息中还包括:所述终端设备的定时提前TA的补偿量offset以及所述offset的变化信息。
  27. 根据权利要求14-26任一项所述的方法,其特征在于,所述网络设备为所述NTN设备;或所述网络设备为接入网设备,所述NTN设备是所述接入网设备与所述终端设备之间的中继设备。
  28. 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通过所述接口电路与其它装置通信,并执行权利要求1至13中任一项或者权利要求14-27任一项所述的方法。
  29. 一种通信装置,其特征在于,包括与存储器耦合的处理器,所述处理器用于执行所述存储器中的计算机程序或指令,使得权利要求1至13中任一项或者权利要求14-27任一项所述的方法被执行。
  30. 一种通信装置,其特征在于,包括:
    确定单元,用于确定系统消息SI;其中,所述系统信息包括非地面网络NTN设备 的位置参数,并且所述系统信息用于指示所述位置参数的时间信息;
    发送单元,用于向终端设备发送所述系统信息。
  31. 根据权利要求30所述的通信装置,其特征在于,所述系统信息的变更周期中的预定时间点用于指示所述位置参数的时间信息。
  32. 根据权利要求31所述的通信装置,其特征在于,所述预定时间点为所述系统信息的变更周期的起始时间点,或者终止时间点。
  33. 根据权利要求30所述的通信装置,其特征在于,承载所述系统信息的SI窗口的预定时间点用于指示所述位置参数的时间信息。
  34. 根据权利要求33所述的通信装置,其特征在于,所述预定时间点为承载所述系统信息的SI窗口结束后的最近的系统帧的边界时刻。
  35. 根据权利要求30所述的通信装置,其特征在于,
    所述发送单元,还用于向所述终端设备发送第一指示信息,所述第一指示信息用于指示参考时间单元;所述参考时间单元的时间信息为所述位置参数的时间信息;所述参考时间单元为系统帧或时隙slot。
  36. 根据权利要求30-35任一项所述的通信装置,其特征在于,
    所述发送单元,还用于向所述终端设备发送短消息short message;其中,所述短消息中所述系统信息的更新标签在所述NTN设备的位置参数发生改变时保持不变。
  37. 根据权利要求30-36任一项所述的通信装置,其特征在于,
    所述系统信息对应的valueTag字段在所述NTN设备的位置参数发生改变时保持不变。
  38. 根据权利要求30-37任一项所述的通信装置,其特征在于,所述NTN设备的位置参数包括:所述NTN设备的位置;或者,所述NTN设备的位置参数包括:所述NTN设备的位置和所述NTN设备的运动信息。
  39. 根据权利要求30-38任一项所述的通信装置,其特征在于,所述NTN设备的位置参数包括基于地心地固坐标系ECEF的NTN设备的位置参数。
  40. 根据权利要求30-38任一项所述的通信装置,其特征在于,所述NTN设备的位置参数包括所述NTN设备的经纬度和所述NTN设备的高度。
  41. 根据权利要求30-40任一项所述的通信装置,其特征在于,所述系统信息中还包括:所述终端设备的定时提前TA的补偿量offset以及所述offset的变化信息。
  42. 根据权利要求30-41任一项所述的通信装置,其特征在于,所述通信装置内置于所述NTN设备;或所述通信装置内置于接入网设备,所述NTN设备是所述接入网设备与所述终端设备之间的中继设备。
  43. 一种通信装置,其特征在于,包括:
    接收单元,用于接收来自网络设备的系统信息SI;其中,所述系统信息包括非地面网络NTN设备的位置参数,并且所述系统信息用于指示所述位置参数的时间信息。
  44. 根据权利要求43所述的通信装置,其特征在于,所述通信装置还包括:确定单元;
    所述确定单元,用于根据所述NTN设备的位置参数和所述位置参数的时间信息确定所述终端设备发送上行数据的定时提前。
  45. 根据权利要求43或44所述的通信装置,其特征在于,所述系统信息的变更周期中的预定时间点用于指示所述位置参数的时间信息。
  46. 根据权利要求45所述的通信装置,其特征在于,所述预定时间点为所述系统信息的变更周期的起始时间点,或者终止时间点。
  47. 根据权利要求43所述的通信装置,其特征在于,承载所述系统信息的SI窗口的预定时间点用于指示所述位置参数的时间信息。
  48. 根据权利要求47所述的通信装置,其特征在于,所述预定时间点为承载上述系统信息的位置参数的SI窗口结束后的最近的系统帧的边界时刻。
  49. 根据权利要求43所述的通信装置,其特征在于,所述接收单元,还用于接收来自所述网络设备的第一指示信息,所述第一指示信息用于指示参考时间单元;所述参考时间单元的时间信息为所述位置参数的时间信息;所述参考时间单元为系统帧或时隙slot。
  50. 根据权利要求43-49任一项所述的通信装置,其特征在于,所述接收单元,还用于接收来自所述网络设备的短消息short message;其中,所述短消息中所述系统信息的更新标签在所述NTN设备的位置参数发生改变时保持不变。
  51. 根据权利要求43-50任一项所述的通信装置,其特征在于,所述系统信息对应的valueTag字段在所述NTN设备的位置参数发生改变时保持不变。
  52. 根据权利要求43-51任一项所述的通信装置,其特征在于,所述NTN设备的位置参数包括:所述NTN设备的位置;或者,所述NTN设备的位置参数包括:所述NTN设备的位置和所述NTN设备的运动信息。
  53. 根据权利要求43-52任一项所述的通信装置,其特征在于,所述NTN设备的位置参数包括基于地心地固坐标系ECEF的NTN设备的位置参数。
  54. 根据权利要求43-52任一项所述的通信装置,其特征在于,所述NTN设备的位置参数包括所述NTN设备的经纬度和所述NTN设备的高度。
  55. 根据权利要求43-54任一项所述的通信装置,其特征在于,所述系统信息中还包括:所述终端设备的定时提前TA的补偿量offset以及所述offset的变化信息。
  56. 根据权利要求43-55任一项所述的通信装置,其特征在于,所述网络设备为所述NTN设备;或所述网络设备为接入网设备,所述NTN设备是所述接入网设备与所述终端设备之间的中继设备。
  57. 一种通信系统,其特征在于,包括:网络设备与终端设备;
    所述网络设备用于执行如权利要求1至13任一项所述的方法,所述终端设备用于执行如权利要求14至27任一项所述的方法。
  58. 一种计算机可读存储介质,其特征在于,包括:计算机软件指令;
    当所述计算机软件指令在数据传输装置或内置在所述数据传输装置的芯片中运行时,使得所述数据传输装置执行权利要求1至13中任一项或者权利要求14至27任一项所述的方法。
  59. 一种计算机程序产品,其特征在于,所述计算机程序产品包括指令,当所述指令在处理器上运行时,如权利要求1至13中任一项或者权利要求14至27中任一项所述的方法被执行。
  60. 一种计算机程序,当其在计算机上运行时,使得权利要求1至13任一项或者权利要求14至17中任一项所述的方法被执行。
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