WO2020221127A1 - 定时提前确定方法及设备 - Google Patents

定时提前确定方法及设备 Download PDF

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Publication number
WO2020221127A1
WO2020221127A1 PCT/CN2020/086721 CN2020086721W WO2020221127A1 WO 2020221127 A1 WO2020221127 A1 WO 2020221127A1 CN 2020086721 W CN2020086721 W CN 2020086721W WO 2020221127 A1 WO2020221127 A1 WO 2020221127A1
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WO
WIPO (PCT)
Prior art keywords
terminal
information
timing advance
network device
network
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PCT/CN2020/086721
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English (en)
French (fr)
Inventor
王爱玲
潘成康
Original Assignee
中国移动通信有限公司研究院
中国移动通信集团有限公司
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Publication of WO2020221127A1 publication Critical patent/WO2020221127A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18513—Transmission in a satellite or space-based system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Definitions

  • the embodiments of the present disclosure relate to the field of communication technologies, and in particular, to a method and device for determining timing advance.
  • the base station In a communication system, in order to avoid intra-cell interference, the base station requires signals from different terminals (such as user equipment (User Equipment, UE)) from the same subframe but different time-frequency resources to arrive at the base station within the alignment time. As long as the base station receives the uplink data sent by the UE within the cyclic prefix (CP), the time synchronization on the receiving side can be guaranteed. Therefore, an uplink timing advance (TA) mechanism is proposed. Timing advance can be used for the terminal's uplink transmission, instructing the UE to send out data packets in advance according to corresponding instructions.
  • the timing advance command (Timing Advance Command, TAC) is sent by the base station to the terminal through the TAC to inform the UE of the amount of time that the timing advances.
  • TAC Timing Advance Command
  • the timing advance is used to instruct the UE to send uplink data in advance according to corresponding instructions.
  • the timing advance is essentially a negative offset between the start time of receiving the downlink subframe and the time of transmitting the uplink subframe.
  • the base station can control the time at which uplink signals from different UEs arrive at the base station by appropriately controlling the time offset of each UE. For UEs far away from the base station, due to a larger transmission delay, it is necessary to use a larger time offset to send uplink data earlier than UEs closer to the base station.
  • the embodiments of the present disclosure provide a method and device for determining timing advance to solve the problem of how to determine timing advance in a non-terrestrial network.
  • a method for determining timing advance is provided, which is applied to a terminal, and includes:
  • the first information indicates a common timing advance, or indicates a fixed timing advance offset value, and the second information indicates a terminal-specific timing advance;
  • the terminal-specific timing advance is positive or negative or zero.
  • the receiving the first information from a network device of a non-terrestrial network includes:
  • a group common message is received from the network device of the non-terrestrial network, where the group common message includes the first information.
  • the common timing advance is applicable to all terminals in the terminal group to which the terminal belongs.
  • the receiving the second information from a network device of a non-terrestrial network includes:
  • the first information is determined by a distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located.
  • the second information is determined by the distance value from the network device of the non-terrestrial network to the cell or beam center where the terminal is located and the distance value from the network device of the non-terrestrial network to the terminal.
  • the receiving the first information and the second information from a network device of a non-terrestrial network includes:
  • MAC RAR Receives a MAC RAR from the network device of the non-terrestrial network, where the MAC RAR includes: the first information and a TAC field, wherein the first information indicates a fixed timing advance offset value, and the second information Is the TAC field information.
  • the first information is determined by the height value of the network device of the non-terrestrial network.
  • a method for determining timing advance which is applied to a network device of a non-terrestrial network, including:
  • the first information and the second information are sent to the terminal; wherein the first information indicates a common timing advance or a fixed timing advance offset value, and the second information indicates a dedicated timing advance for the terminal.
  • the sending the first information to the terminal includes:
  • the common timing advance is applicable to all terminals in the terminal group to which the terminal belongs.
  • the sending the second information to the terminal includes:
  • the method before the sending the first information and the second information to the terminal, the method further includes:
  • the first information is determined according to the distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located.
  • the method before the sending the first information and the second information to the terminal, the method further includes:
  • the determining the distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located includes:
  • the sending the first information and the second information to the terminal includes:
  • a MAC RAR is sent to the terminal, where the MAC RAR includes: the first information and a TAC field, where the first information indicates a fixed timing advance offset value, and the second information is TAC field information.
  • the first information is determined by the height value of the network device of the non-terrestrial network.
  • a method for determining timing advance, applied to a terminal including:
  • the terminal-specific timing advance is positive or negative or zero.
  • the receiving the TAC field from a network device of a non-terrestrial network includes:
  • MAC RAR Receives a MAC RAR from the network device of the non-terrestrial network, where the MAC RAR includes: the TAC field.
  • the TA index value range adopts a TAC non-uniform quantization indication mode.
  • the value of the TA index value is non-uniformly divided into a plurality of TA index value segments, wherein the value of the TA index value in the TA index value segment is negatively correlated with the adopted step size, the The step size is used for indicating correspondence between TAC and TA index value.
  • a method for determining timing advance which is applied to a network device of a non-terrestrial network, including:
  • TAC field is used to instruct the terminal to determine the timing advance of the terminal according to the received TAC field and the corresponding relationship between the TAC field and the TA index value.
  • the sending the TAC field to the terminal includes:
  • the TA index value range adopts a TAC non-uniform quantization indication mode.
  • the value of the TA index value is non-uniformly divided into a plurality of TA index value segments, wherein the value of the TA index value in the TA index value segment is negatively correlated with the adopted step size, the The step size is used for indicating correspondence between TAC and TA index value.
  • a terminal including: a first transceiver and a first processor, wherein,
  • the first transceiver is configured to receive first information and second information from a network device that is not a terrestrial network;
  • the first processor is configured to determine the timing advance of the terminal according to the first information and the second information;
  • the first information indicates a common timing advance, or indicates a fixed timing advance offset value, and the second information indicates a terminal-specific timing advance;
  • the terminal-specific timing advance is positive or negative or zero.
  • the first transceiver is further configured to receive periodic broadcast messages from network devices on the non-terrestrial network, where the broadcast messages include the first information;
  • the first transceiver is further configured to receive a periodic synchronization signal block SSB from a network device of the non-terrestrial network, where the SSB includes the first information;
  • the first transceiver is further configured to receive a group common message from a network device of the non-terrestrial network, where the group common message includes the first information;
  • the first information indicates the common timing advance.
  • the common timing advance is applicable to all terminals in the terminal group to which the terminal belongs.
  • the first transceiver is further configured to receive a media access control MAC random access response RAR from the network device of the non-terrestrial network, where the MAC RAR includes a TAC field.
  • the first information is determined by a distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located.
  • the second information is determined by the distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located and the distance value from the network device of the non-terrestrial network to the terminal.
  • the first transceiver is further configured to receive a MAC RAR from a network device of the non-terrestrial network, where the MAC RAR includes: the first information and a TAC field, where the first information indicates A fixed timing advance offset value, and the second information is TAC field information.
  • the first information is determined by the height value of the network device of the non-terrestrial network.
  • a network device of a non-terrestrial network including: a second transceiver and a second processor, wherein,
  • the second transceiver is configured to send first information and second information to the terminal; wherein, the first information indicates a common timing advance or a fixed timing advance offset value, and the second information indicates The terminal-specific timing advance.
  • the second transceiver is further configured to periodically send a broadcast message to the terminal, where the broadcast message includes the first information
  • the second transceiver is further configured to periodically send an SSB to the terminal, where the SSB includes the first information
  • the second transceiver is further configured to send a group common message to the terminal, where the group common message includes the first information
  • the first information indicates the common timing advance.
  • the common timing advance is applicable to all terminals in the terminal group to which the terminal belongs.
  • the second transceiver is further configured to send a MAC RAR to the terminal, and the MAC RAR includes a TAC field.
  • the second processor is configured to determine a distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located;
  • the second processor is further configured to determine the first information according to the distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located.
  • the second processor is further configured to determine a distance value from the network device of the non-terrestrial network to the terminal;
  • the second processor is further configured to determine the distance value from the network device of the non-terrestrial network to the cell center of the terminal;
  • the second processor is further configured to determine the difference between the distance value from the network device of the non-terrestrial network to the terminal and the distance value from the network device of the non-terrestrial network to the cell center of the terminal The second information.
  • the second processor is further configured to determine the cell center of the terminal according to the height value of the network device of the non-terrestrial network and the ephemeris information of the network device of the non-terrestrial network;
  • the second processor is further configured to use the cell center where the terminal is located as a reference point to determine the distance value from the network device of the non-terrestrial network to the cell center where the terminal is located.
  • the second transceiver is further configured to send a MAC RAR to the terminal, where the MAC RAR includes: the first information and a TAC field, where the first information indicates a fixed timing advance Offset value, the second information is TAC field information.
  • the first information is determined by the height value of the network device of the non-terrestrial network.
  • a terminal including a third transceiver and a third processor, wherein:
  • the third transceiver is configured to receive the TAC field of a timing advance command from a network device on a non-terrestrial network;
  • the third processor is configured to determine the timing advance of the terminal according to the received TAC field and the corresponding relationship between the TAC field and the timing advance TA index value;
  • the terminal-specific timing advance is positive or negative or zero.
  • the third transceiver is further configured to receive a MAC RAR from a network device of the non-terrestrial network, and the MAC RAR includes: the TAC field.
  • the TA index value range adopts a TAC non-uniform quantization indication mode.
  • the value of the TA index value is non-uniformly divided into a plurality of TA index value segments, wherein the value of the TA index value in the TA index value segment is negatively correlated with the adopted step size, the The step size is used for indicating correspondence between TAC and TA index value.
  • a network device of a non-terrestrial network including: a fourth transceiver and a fourth processor, wherein,
  • the fourth transceiver is configured to send a TAC field to the terminal, where the TAC field is used to instruct the terminal to determine the timing advance of the terminal according to the received TAC field and the corresponding relationship between the TAC field and the TA index value the amount.
  • the fourth transceiver is further configured to send a MAC RAR to the terminal, and the MAC RAR includes the TAC field.
  • the TA index value range adopts a TAC non-uniform quantization indication mode.
  • the value of the TA index value is non-uniformly divided into a plurality of TA index value segments, wherein the value of the TA index value in the TA index value segment is negatively correlated with the adopted step size, the The step size is used for indicating correspondence between TAC and TA index value.
  • a terminal including: wherein the first transceiver is configured to receive first information and second information from a network device that is not a terrestrial network;
  • the first receiving module is configured to receive the first information and the second information from a network device that is not a terrestrial network;
  • a first determining module configured to determine the timing advance of the terminal according to the first information and the second information
  • the first information indicates a common timing advance, or indicates a fixed timing advance offset value, and the second information indicates a terminal-specific timing advance;
  • the terminal-specific timing advance is positive or negative or zero.
  • the first receiving module is further configured to receive periodic broadcast messages from network devices on the non-terrestrial network, where the broadcast messages include the first information;
  • the first receiving module is further configured to receive a periodic synchronization signal block SSB from a network device of the non-terrestrial network, where the SSB includes the first information;
  • the first receiving module is further configured to receive a group common message from a network device of the non-terrestrial network, where the group common message includes the first information;
  • the first information indicates the common timing advance.
  • the common timing advance is applicable to all terminals in the terminal group to which the terminal belongs.
  • the first receiving module is further configured to receive a media access control MAC random access response RAR from the network device of the non-terrestrial network, where the MAC RAR includes a TAC field.
  • the first information is determined by a distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located.
  • the second information is determined by the distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located and the distance value from the network device of the non-terrestrial network to the terminal.
  • the first receiving module is further configured to receive a MAC RAR from a network device of the non-terrestrial network, where the MAC RAR includes: the first information and a TAC field, where the first information indicates A fixed timing advance offset value, and the second information is TAC field information.
  • the first information is determined by the height value of the network device of the non-terrestrial network.
  • a non-terrestrial network network device including:
  • the second sending module is configured to send first information and second information to the terminal; wherein, the first information indicates a common timing advance or a fixed timing advance offset value, and the second information indicates the Terminal-specific timing advance.
  • the second sending module is further configured to periodically send a broadcast message to the terminal, where the broadcast message includes the first information
  • the second sending module is further configured to periodically send an SSB to the terminal, where the SSB includes the first information
  • the second sending module is further configured to send a group common message to the terminal, where the group common message includes the first information
  • the first information indicates the common timing advance.
  • the common timing advance is applicable to all terminals in the terminal group to which the terminal belongs.
  • the second sending module is further configured to send a MAC RAR to the terminal, and the MAC RAR includes a TAC field.
  • the network equipment of the non-terrestrial network further includes:
  • a third determining module configured to determine the distance value from the network device of the non-terrestrial network to the cell center where the terminal is located;
  • the third determining module is further configured to determine the first information according to the distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located.
  • the third determining module is further configured to determine a distance value from the network device of the non-terrestrial network to the terminal;
  • the third determining module is further configured to determine the distance value from the network device of the non-terrestrial network to the cell center of the terminal;
  • the third determining module is further configured to determine according to the difference between the distance value from the network device of the non-terrestrial network to the terminal and the distance value from the network device of the non-terrestrial network to the cell center of the terminal The second information.
  • the third determining module is further configured to determine the cell center of the terminal according to the height value of the network device of the non-terrestrial network and the ephemeris information of the network device of the non-terrestrial network;
  • the third determining module is further configured to use the cell center where the terminal is located as a reference point to determine the distance value from the network device of the non-terrestrial network to the cell center where the terminal is located.
  • the second sending module is further configured to send a MAC RAR to the terminal, where the MAC RAR includes: the first information and a TAC field, wherein the first information indicates a fixed timing advance Offset value, the second information is TAC field information.
  • the first information is determined by the height value of the network device of the non-terrestrial network.
  • a terminal including:
  • the second receiving module is configured to receive the TAC field of the timing advance command from a network device on a non-terrestrial network;
  • the second determining module is configured to determine the timing advance of the terminal according to the received TAC field and the corresponding relationship between the TAC field and the timing advance TA index value;
  • the terminal-specific timing advance is positive or negative or zero.
  • the second receiving module is further configured to receive a MAC RAR from a network device of the non-terrestrial network, where the MAC RAR includes: the TAC field.
  • the value of the TA index value is non-uniformly divided into a plurality of TA index value segments, wherein the value of the TA index value in the TA index value segment is negatively correlated with the adopted step size, and the step Long-term use for TAC and TA index value indication correspondence.
  • a network device of a non-terrestrial network including:
  • the second sending module is configured to send a TAC field to the terminal, where the TAC field is used to instruct the terminal to determine the timing advance of the terminal according to the received TAC field and the corresponding relationship between the TAC field and the TA index value.
  • the second sending module is further configured to send a MAC RAR to the terminal, and the MAC RAR includes the TAC field.
  • the value of the TA index value is non-uniformly divided into a plurality of TA index value segments, wherein the value of the TA index value in the TA index value segment is negatively correlated with the adopted step size, and the step Long-term use for TAC and TA index value indication correspondence.
  • a terminal including: a processor, a memory, and a program stored on the memory and capable of running on the processor, the program being processed by the When the device is executed, the steps of the method for determining the timing advance as described in the first aspect or the steps of the method for determining the timing advance as described in the third aspect are implemented.
  • a network device of a non-terrestrial network including: a processor, a memory, and a program stored in the memory and capable of running on the processor, the When the program is executed by the processor, the steps of the timing advance determination method described in the second aspect or the steps of the timing advance determination method described in the fourth aspect are implemented.
  • a computer-readable storage medium having a computer program stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program is executed as described in the first aspect.
  • the terminal determines the timing advance of the terminal by receiving information related to the timing advance from the network device of the non-terrestrial network, and solves the problem of how to determine the timing advance in the non-terrestrial network.
  • Figure 1 Schematic diagram of the structure of the uplink subframe and the lower subframe
  • FIG. 2a is one of the schematic flowcharts of a method for determining timing advance provided by some embodiments of the present disclosure
  • Figure 2b is one of the schematic diagrams of the non-terrestrial network structure provided by some embodiments of the present disclosure.
  • Figure 2c is the second schematic diagram of a non-terrestrial network structure provided by some embodiments of the present disclosure.
  • FIG. 3 is a second schematic flowchart of a method for determining timing advance provided by some embodiments of the present disclosure
  • FIG. 4 is the third schematic flowchart of a method for determining timing advance provided by some embodiments of the present disclosure
  • FIG. 5 is a fourth schematic flowchart of a method for determining timing advance provided by some embodiments of the present disclosure
  • 6a is the fifth schematic flowchart of a method for determining timing advance provided by some embodiments of the present disclosure
  • FIG. 6b is a schematic diagram of the structure of the TAC field in the MAC RAR provided by some embodiments of the present disclosure
  • FIG. 7 is a sixth flowchart of a method for determining timing advance provided by some embodiments of the present disclosure.
  • FIG. 8 is one of the schematic diagrams of the terminal structure provided by some embodiments of the present disclosure.
  • FIG. 9 is one of the schematic diagrams of a network device structure of a non-terrestrial network provided by some embodiments of the present disclosure.
  • FIG. 10 is the second schematic diagram of the terminal structure provided by some embodiments of the present disclosure.
  • FIG. 11 is a second schematic diagram of a network device structure of a non-terrestrial network provided by some embodiments of the present disclosure.
  • FIG. 12 is the third schematic diagram of the terminal structure provided by some embodiments of the present disclosure.
  • FIG. 13 is the third schematic diagram of a network device structure of a non-terrestrial network provided by some embodiments of the present disclosure.
  • FIG. 14 is the fourth schematic diagram of the terminal structure provided by some embodiments of the present disclosure.
  • FIG. 15 is a fourth schematic diagram of a network device structure of a non-terrestrial network provided by some embodiments of the present disclosure.
  • FIG. 16 is the fifth schematic diagram of the terminal structure provided by some embodiments of the present disclosure.
  • FIG. 17 is a fifth schematic diagram of a network device structure of a non-terrestrial network provided by some embodiments of the disclosure.
  • words such as “exemplary” or “for example” are used as examples, illustrations, or illustrations. Any embodiment or design solution described as “exemplary” or “for example” in some embodiments of the present disclosure should not be construed as being more preferable or advantageous than other embodiments or design solutions. To be precise, words such as “exemplary” or “for example” are used to present related concepts in a specific manner.
  • the technology described in this article is not limited to the fifth-generation mobile communication (5th-generation, 5G) system and subsequent evolved communication systems, and is not limited to the LTE/LTE evolution (LTE-Advanced, LTE-A) system, and can also be used for various A kind of wireless communication system, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (Frequency Division Multiple Access, FDMA), Orthogonal Frequency Division Multiple Access (Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single-carrier Frequency-Division Multiple Access
  • the terms “system” and “network” are often used interchangeably.
  • the CDMA system can implement radio technologies such as CDMA2000 and Universal Terrestrial Radio Access (UTRA).
  • UTRA includes Wideband Code Division Multiple Access (WCDMA) and other CDMA variants.
  • the TDMA system can implement radio technologies such as the Global System for Mobile Communication (GSM).
  • OFDMA system can realize such as ultra mobile broadband (Ultra Mobile Broadband, UMB), evolved UTRA ((Evolution-UTRA, E-UTRA)), IEEE 802.11 ((Wi-Fi)), IEEE 802.16 ((WiMAX)), IEEE 802.20, Flash-OFDM and other radio technologies.
  • UMB Ultra Mobile Broadband
  • E-UTRA evolved UTRA
  • IEEE 802.11 (Wi-Fi)
  • IEEE 802.16 (WiMAX)
  • IEEE 802.20 Flash-OFDM and other radio technologies.
  • UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS).
  • LTE and more advanced LTE are new UMTS versions that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project” (3GPP).
  • CDMA2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2" (3GPP2).
  • the technology described in this article can be used for the systems and radio technologies mentioned above as well as other systems and radio technologies.
  • the terminal may be a mobile phone, a tablet computer, a notebook computer, an Ultra-Mobile Personal Computer (UMPC), a netbook or a Personal Digital Assistant (PDA), a mobile Internet device ( Mobile Internet Device, MID), wearable device (Wearable Device) or vehicle-mounted device, etc.
  • UMPC Ultra-Mobile Personal Computer
  • PDA Personal Digital Assistant
  • Mobile Internet Device Mobile Internet Device, MID
  • Wearable Device Wearable Device
  • vehicle-mounted device etc.
  • Non-Terrestrial Network refers to the integration of satellite communications and 5G to form an integrated sea, land and air communication network to provide the key performance required for 5G services.
  • satellites can be uncovered by terrestrial 5G networks. Provide economical and reliable network services in remote areas, airplanes or ships, etc., to increase 5G network coverage; satellites can provide continuous and uninterrupted network connections for mobile terminals such as airplanes, ships, and high-speed railways, and enhance the service capabilities of 5G networks; satellite broadcasting/ Multicast capabilities can provide efficient data distribution service capabilities for network edge terminals.
  • T c 1/( ⁇ f max ⁇ N f ) is a time unit
  • N TA,offset depends on duplex mode and upstream transmission bandwidth. According to the values of different subcarrier intervals, it can be calculated that when the TA index value is the maximum value of 3846, the maximum transmission distance that the relevant TA mechanism can support is shown in Table 1.
  • the uplink timing advance is a UE-specific configuration.
  • NTN systems especially non-geosynchronous satellite systems, satellites move fast and their positions are not fixed. Therefore, it may be necessary to dynamically update the TA of each terminal. Frequent updating of the TA value of each terminal will cause the network to signal Make the overhead too large.
  • some embodiments of the present disclosure provide a method for determining timing advance.
  • the execution subject of the method is a terminal.
  • the specific steps of the method are as follows:
  • Step 201 Receive first information and second information from a network device on a non-terrestrial network, where the first information indicates a public timing advance, and the second information indicates a terminal-specific timing advance;
  • Step 202 Determine the timing advance of the terminal according to the first information and the second information
  • the figure shows a non-terrestrial network.
  • the satellite 21 Take the satellite 21 as an example of the network equipment of the non-terrestrial network. Due to the high position of the satellite 21, the distance between each terminal and the satellite 21 can be a uniform distance L2 (that is, the satellite 21 The distance to the center of the cell where the terminal is located) and the terminal specific distance L1.
  • the terminal in order to reduce network-side overhead, receives first information and second information from a network device on a non-terrestrial network.
  • the first information indicates a common timing advance (UE group based common TA).
  • the second information indicates a terminal-specific timing advance (UE specific TA).
  • the terminals are grouped according to certain rules to a terminal group (for example, all terminals within the coverage of each beam are a group), where UE group based common TA applies to all terminals in the terminal group to which the terminal belongs.
  • the terminal can receive the group based common TA of the UE in the following ways:
  • Manner 1 The terminal receives a periodic broadcast message from a network device on a non-terrestrial network, and the broadcast message includes the first information;
  • Manner 2 The terminal receives a periodic synchronization signal block (Synchronization Signal block, SSB) from a network device on a non-terrestrial network, and the SSB includes the first information;
  • SSB Synchronization Signal block
  • Manner 3 The terminal receives a group common message from a network device on a non-terrestrial network, and the group common message includes the first information.
  • the UE group based common TA is included in the broadcast message, SSB, or group common message, and the TA value does not need to be extended.
  • the group based common TA of the UE is determined by the distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located.
  • Each terminal in the same group can dynamically and accurately adjust the TA value through the UE-specific TA, where the UE-specific TA is the relative offset value of the UE group-based common TA, and the offset value can be positive or negative. shift.
  • the way for the terminal to receive the UE-specific TA is: the terminal receives a Media Access Control (MAC) random access response (Random Access Response, RAR) from a network device on a non-terrestrial network, and the MAC RAR includes: TAC Field, the network equipment of the non-terrestrial network multiplexes the TAC field in the relevant NR to notify the UE of the specific TA to the terminal, and there is no need to extend the TA to the terminal.
  • MAC Media Access Control
  • RAR Random Access Response
  • the UE-specific TA is determined by the distance value from the network device of the non-terrestrial network to the cell center where the terminal is located and the distance value from the network device of the non-terrestrial network to the terminal. Establish a corresponding relationship between the distance value and the second information, so that the corresponding second information can be directly obtained through the distance value.
  • the TA value does not need to be extended.
  • the UE group based common TA is included in the broadcast message, SSB or group common message, and the TAC in the MAC RAR is reused
  • the field indicates UE-specific TA, which can reduce signaling overhead, and when the terminal needs to update the TA frequently, it can also reduce the power consumption of the terminal due to the detection of TA indication information.
  • the satellite 21 can deliver multiple or even hundreds of beams to serve users, and each beam can also serve multiple terminals.
  • the terminals that use the same beam service are divided into a terminal group, for example, beam 1.
  • the UE of each terminal is notified through the MAC CE to perform the TA update.
  • the terminal 22 adjusts the TA according to the UE group-based TA information broadcast by the beam 2, and can further notify the UE of each terminal to perform TA update through MAC CE as needed. .
  • the terminal receives the first information indicating the group based common TA of the UE and the second information indicating the UE specific TA from the network equipment of the non-terrestrial network, and the timing advance is determined by the first information and the second information To solve the problem of how to determine the timing advance in non-terrestrial networks.
  • some embodiments of the present disclosure provide a method for determining timing advance.
  • the execution body of the method is a network device of a non-terrestrial network.
  • the specific steps of the method are as follows:
  • Step 301 Send first information and second information to the terminal, where the first information indicates a public timing advance, and the second information indicates a terminal-specific timing advance;
  • the first information indicates the UE group based common TA
  • the second information indicates the UE specific TA
  • the terminals are grouped according to certain rules to a terminal group (for example, all terminals within the coverage of each beam are a group), where UE group based common TA applies to all terminals in the terminal group to which the terminal belongs
  • the network equipment of the non-terrestrial network can send the UE group based common TA to the terminal in the following manner:
  • Manner 1 The network device of the non-terrestrial network periodically sends a broadcast message to the terminal, and the broadcast message includes the first information;
  • Manner 2 The network device of the non-terrestrial network periodically sends the SSB to the terminal, and the SSB includes the first information;
  • Manner 3 The network device of the non-terrestrial network sends a group common message to the terminal, and the group common message includes the first information.
  • the UE group based common TA is included in the broadcast message, SSB, or group common message, and the TA value does not need to be extended.
  • the method further includes the following steps:
  • the cell center of the terminal is determined according to the height value of the network device of the non-terrestrial network and the ephemeris information of the network device of the non-terrestrial network.
  • the ephemeris information may include the movement information and location information of the network equipment of the non-terrestrial network.
  • the ephemeris information can determine the time, coordinates, azimuth and speed of the flying body and other parameters. Some embodiments of the present disclosure compare the ephemeris information The content of is not specifically limited.
  • the network equipment of the non-terrestrial network uses the cell center where the terminal is located as a reference point to determine the distance value from the network equipment of the non-terrestrial network to the cell center where the terminal is located.
  • Each terminal in the same group can dynamically and accurately adjust the TA value through the UE-specific TA, where the UE-specific TA is the relative offset value of the UE group-based common TA, and the offset value can be positive or negative. shift.
  • the non-terrestrial network device sends the UE-specific TA in the following manner: the non-terrestrial network device sends a MAC RAR to the terminal.
  • the MAC RAR includes the TAC field.
  • the non-terrestrial network network device multiplexes the relevant NR.
  • the TAC field informs the UE of a specific TA to the terminal, and there is no need to extend the TA value.
  • the method further includes the following steps:
  • the cell center of the terminal is determined according to the height value of the network device of the non-terrestrial network and the ephemeris information of the network device of the non-terrestrial network.
  • the ephemeris information may include the movement information and location information of the network equipment of the non-terrestrial network.
  • the ephemeris information can determine the time, coordinates, azimuth and speed of the flying body and other parameters. Some embodiments of the present disclosure compare the ephemeris information The content of is not specifically limited.
  • the network equipment of the non-terrestrial network uses the cell center where the terminal is located as a reference point to determine the distance value from the network equipment of the non-terrestrial network to the cell center where the terminal is located.
  • the TA value does not need to be extended.
  • the UE group based common TA is included in the broadcast message, SSB or group common message, and the TAC in the MAC RAR is reused
  • the field indicates UE-specific TA, which can reduce signaling overhead, and when the terminal needs to update the TA frequently, it can also reduce the power consumption of the terminal due to the detection of TA indication information.
  • a network device of a non-terrestrial network sends to the terminal first information indicating the UE group based common TA and second information indicating the UE specific TA, and the timing advance is determined by the first information and the second information To solve the problem of how to determine the timing advance in non-terrestrial networks.
  • some embodiments of the present disclosure provide a method for determining timing advance.
  • the execution subject of the method is a terminal.
  • the specific steps of the method are as follows:
  • Step 401 Receive first information and second information from a network device on a non-terrestrial network, where the first information indicates a fixed timing advance offset value, and the second information indicates a terminal-specific timing advance;
  • Step 402 Determine the timing advance of the terminal according to the first information and the second information
  • the way for the terminal to receive the first information and the second information is to receive a MAC RAR from a network device on a non-terrestrial network
  • the MAC RAR includes: first information and a TAC field, where the first information indicates The fixed timing advance offset value, the second information is the TAC field information, and the UE is notified of the specific TA to the terminal by multiplexing the TAC field in the relevant NR, and there is no need to extend the TA index value.
  • the TAC received by the non-terrestrial terminal contains two parts, one is the first Information, the first information indicates the fixed timing advance offset value, the other part is the second information, the second information indicates the UE specific TA, that is, the amount of TA that needs to be adjusted for each UE specified by the TAC, and the UE needs to adjust
  • the amount of TA is determined by terminal location information and detecting uplink signals sent by the terminal.
  • the first information is determined by the height value of the network device of the non-terrestrial network.
  • the specific determination process may adopt a related manner to establish a corresponding relationship between the height value of the network device of the non-terrestrial network and the first information, so that the corresponding first information can be directly obtained through the height value.
  • the terminal solves the TA value and superimposes a fixed TA on this value. Offset, this solution can reduce signaling overhead.
  • the terminal receives the first information indicating the fixed timing advance offset value and the second information indicating the UE-specific TA from the network equipment of the non-terrestrial network, through the first information and the second information Determine the timing advance to solve the problem of how to determine the timing advance in non-terrestrial networks.
  • some embodiments of the present disclosure provide a method for determining timing advance.
  • the execution body of the method is a network device of a non-terrestrial network.
  • the specific steps of the method are as follows:
  • Step 501 Send first information and second information to the terminal, where the first information indicates a fixed timing advance offset value, and the second information indicates a terminal-specific timing advance;
  • the way for a network device on a non-terrestrial network to send the first information and the second information is to send a MAC RAR to the terminal, where the MAC RAR includes: first information and a TAC field, where the first information Indicate the fixed timing advance offset value, the second information is the TAC field information, the UE is notified of the specific TA to the terminal by multiplexing the TAC field in the relevant NR, and there is no need to extend the TA index value.
  • the TAC received by the non-terrestrial terminal contains two parts, one is the first Information, the first information indicates the fixed timing advance offset value, the other part is the second information, the second information indicates the UE specific TA, that is, the amount of TA that needs to be adjusted for each UE specified by the TAC, and the UE needs to adjust
  • the amount of TA is determined by the terminal location information and the base station detecting the uplink signal sent by the terminal.
  • the first information is determined by the height value of the network device of the non-terrestrial network.
  • the specific determination process may adopt a related manner to establish a corresponding relationship between the height value of the network device of the non-terrestrial network and the first information, so that the corresponding first information can be directly obtained through the height value.
  • the terminal solves the TA value and superimposes a fixed TA on this value. Offset, this solution can reduce signaling overhead.
  • a network device of a non-terrestrial network sends to the terminal first information indicating a fixed timing advance offset value, and second information indicating a UE-specific TA. Through the first information and the second information Determine the timing advance to solve the problem of how to determine the timing advance in non-terrestrial networks.
  • some embodiments of the present disclosure provide a method for determining timing advance.
  • the execution subject of the method is a terminal.
  • the specific steps of the method are as follows:
  • Step 601 Receive a TAC field from a network device on a non-terrestrial network
  • Step 602 Determine the timing advance of the terminal according to the received TAC field and the corresponding relationship between the TAC field and the TA index value;
  • the manner in which the terminal receives the TAC field from the network device of the non-terrestrial network is: receiving the MAC RAR from the network device of the non-terrestrial network, and the MAC RAR includes the TAC field.
  • the figure shows a structure of the TAC field in the MAC RAR.
  • the TA value is determined by measuring the received preamble and sent to the terminal through the TAC field of the MAC RAR.
  • the TAC field in the RAR has a total of 12 bits, and the corresponding TA index value is 0 to 3846. That is, the bit value of the TAC field and the TA index value can form a one-to-one correspondence.
  • the satellite height is generally 600-1500km
  • the value of TA at this time is at least 7692 ⁇ 19230, that is, the TAC field in RAR should be expanded to 13-15bit, but in satellite communication systems, the configuration is small
  • the probability of the TA value is very small, so this proposal proposes a non-uniform quantization indication method for TAC after expanding the TA index value range for the NTN system.
  • the value of the TA index value is non-uniformly divided into a plurality of TA index value segments, wherein the value of the TA index value in the TA index value segment is negatively correlated with the adopted step size, For example, when the value of the TA index value in the TA index value section is small, a large step size is used to indicate, and when the value of the TA index value in the TA index value section is large, a small step size is used to indicate, and this step size is used for TAC and TA indexing The indication of the value corresponds.
  • the TA index value is non-uniformly divided into n segments.
  • the maximum value of TA is 7692, it can be segmented into 0-3846, 3847-5769, 5770-6732, 6733-7214, 7215-7456, 7457-7578 , 7578-7638, 7639-7668, 7669-7684, 7685-7692;
  • TA index value For segments with a relatively small TA index value, use a larger step size to indicate the corresponding TAC and TA index values. For segments with a larger TA index value, use a smaller step size to indicate the TAC and TA index values.
  • the step size is 60, that is, when the value of the lower 6 bits is When "000000”, the TA index value is 0, when the lower 6 bits value is "000001", the TA index value is 60;
  • the additional TA can be indicated by redefining the relationship between the value of the TAC field and the TA index value. Index value.
  • the terminal receives the TAC field from the network device of the non-terrestrial network, and determines the timing advance of the terminal according to the received TAC field and the corresponding relationship between the TAC field and the TA index value to solve the problem of How to determine the timing advance in the network.
  • some embodiments of the present disclosure provide a timing advance determination method.
  • the execution body of the method is a network device of a non-terrestrial network.
  • the specific steps of the method are as follows:
  • Step 701 Send the TAC field to the terminal
  • the TAC field is used to instruct the terminal to determine the timing advance of the terminal according to the received TAC field and the corresponding relationship between the TAC field and the TA index value.
  • the way for the network device of the non-terrestrial network to send the TAC field to the terminal is to send a MAC RAR to the terminal, and the MAC RAR includes the TAC field.
  • the value of the TA index value is non-uniformly divided into a plurality of TA index value segments.
  • the value of the TA index value in the TA index value segment is negatively correlated with the adopted step size, that is, TA
  • a large step size is used to indicate
  • a small step size is used to indicate. This step size is used to perform the TAC and TA index value Instructions correspond.
  • the additional TA can be indicated by redefining the relationship between the TAC field value and the TA index value Index value.
  • the network device of the non-terrestrial network sends the TAC field to the terminal, and the terminal determines the timing advance of the terminal according to the received TAC field and the corresponding relationship between the TAC field and the TA index value to solve the problem of How to determine the timing advance in the network.
  • a terminal 800 including: a first transceiver 801 and a first processor 802;
  • the first transceiver 801 is configured to receive first information and second information from a network device on a non-terrestrial network;
  • the first processor 802 is configured to determine the timing advance of the terminal according to the first information and the second information;
  • the first information indicates a common timing advance, or indicates a fixed timing advance offset value
  • the second information indicates a terminal-specific timing advance
  • the first transceiver 801 is further configured to receive periodic broadcast messages from network devices of the non-terrestrial network, where the broadcast messages include the first information;
  • the first transceiver 801 is further configured to receive a periodic synchronization signal block SSB from a network device of the non-terrestrial network, where the SSB includes the first information;
  • the first transceiver 801 is further configured to receive a group common message from a network device of the non-terrestrial network, where the group common message includes the first information;
  • the first information indicates the common timing advance.
  • the common timing advance is applicable to all terminals in the terminal group to which the terminal belongs.
  • the first transceiver 801 is further configured to receive a media access control MAC random access response RAR from a network device of the non-terrestrial network, where the MAC RAR includes a TAC field.
  • the first information is determined by a distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located.
  • the second information is determined by the distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located and the distance value from the network device of the non-terrestrial network to the terminal.
  • the first transceiver 801 is further configured to receive a MAC RAR from a network device of the non-terrestrial network, where the MAC RAR includes: the first information and a TAC field, where the first information Indicates a fixed timing advance offset value, and the second information is TAC field information.
  • the first information is determined by the height value of the network device of the non-terrestrial network.
  • some embodiments of the present disclosure provide a non-terrestrial network network device 900, including: a second transceiver 901 and a second processor 902;
  • the second transceiver 901 is configured to send first information and second information to the terminal; wherein, the first information indicates a common timing advance, or indicates a fixed timing advance offset value, the second The second information indicates the terminal-specific timing advance.
  • the second transceiver 901 is further configured to periodically send a broadcast message to the terminal, where the broadcast message includes the first information;
  • the second transceiver 901 is also configured to periodically send an SSB to the terminal, where the SSB includes the first information;
  • the second transceiver 901 is further configured to send a group common message to the terminal, where the group common message includes the first information;
  • the first information indicates the common timing advance.
  • the common timing advance is applicable to all terminals in the terminal group to which the terminal belongs.
  • the second transceiver 901 is further configured to send a MAC RAR to the terminal, and the MAC RAR includes a TAC field.
  • the second processor 902 is configured to determine a distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located;
  • the second processor 902 is further configured to determine the first information according to the distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located.
  • the second processor 902 is further configured to determine a distance value from the network device of the non-terrestrial network to the terminal;
  • the second processor 902 is further configured to determine the distance value from the network device of the non-terrestrial network to the cell center of the terminal;
  • the second processor 902 is further configured to determine the difference between the distance value from the network device of the non-terrestrial network to the terminal and the distance value from the network device of the non-terrestrial network to the cell center of the terminal, Determine the second information.
  • the second processor 902 is further configured to determine the cell center of the terminal according to the height value of the network device of the non-terrestrial network and the ephemeris information of the network device of the non-terrestrial network;
  • the second processor 902 is further configured to use the cell center where the terminal is located as a reference point to determine the distance value from the network device of the non-terrestrial network to the cell center where the terminal is located.
  • the second transceiver 901 is further configured to send a MAC RAR to the terminal, where the MAC RAR includes: the first information and a TAC field, where the first information indicates a fixed timing advance The amount offset value, the second information is TAC field information.
  • the first information is determined by the height value of the network device of the non-terrestrial network.
  • some embodiments of the present disclosure provide a terminal 1000, including a third transceiver 1001 and a third processor 1002, where:
  • the third transceiver 1001 is configured to receive the TAC field of a timing advance command from a network device on a non-terrestrial network;
  • the third processor 1002 is configured to determine the timing advance of the terminal according to the received TAC field and the corresponding relationship between the TAC field and the timing advance TA index value.
  • the third transceiver 1001 and the third transceiver 1001 are further configured to receive a MAC RAR from a network device of the non-terrestrial network, and the MAC RAR includes: the TAC field.
  • the TA index value range adopts a TAC non-uniform quantization indication mode.
  • the value of the TA index value is non-uniformly divided into a plurality of TA index value segments, wherein the value of the TA index value in the TA index value segment is negatively correlated with the adopted step size, the The step size is used for indicating correspondence between TAC and TA index value.
  • some embodiments of the present disclosure provide a non-terrestrial network network device 1100, including: a fourth transceiver 1101 and a fourth processor 1102;
  • the fourth transceiver 1101 is configured to send a TAC field to the terminal, and the TAC field is used to instruct the terminal to determine the terminal according to the received TAC field and the corresponding relationship between the TAC field and the TA index value The timing advance.
  • the fourth transceiver 1101 is further configured to send a MAC RAR to the terminal, and the MAC RAR includes the TAC field.
  • the TA index value range adopts a TAC non-uniform quantization indication mode.
  • the value of the TA index value is non-uniformly divided into a plurality of TA index value segments, wherein the value of the TA index value in the TA index value segment is negatively correlated with the adopted step size, the The step size is used for indicating correspondence between TAC and TA index value.
  • some embodiments of the present disclosure provide a terminal 1200, including: at least one processor 1201, memory 1202, user interface 1203, and at least one network interface 1204.
  • the various components in the terminal 1200 are coupled together through the bus system 1205.
  • bus system 1205 is used to implement connection and communication between these components.
  • the bus system 1205 also includes a power bus, a control bus, and a status signal bus.
  • various buses are marked as the bus system 1205 in FIG. 12.
  • the user interface 1203 may include a display, a keyboard, or a pointing device (for example, a mouse, a trackball, a touch panel, or a touch screen, etc.).
  • a pointing device for example, a mouse, a trackball, a touch panel, or a touch screen, etc.
  • the memory 1202 in some embodiments of the present disclosure may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • DDRSDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • Enhanced SDRAM, ESDRAM Synchronous Dynamic Random Access Memory
  • SLDRAM Synchronous Link Dynamic Random Access Memory
  • DRRAM Direct Rambus RAM
  • the memory 902 described in some embodiments of the present disclosure is intended to include, but is not limited to, these and any other suitable types of memory.
  • the memory 1202 stores the following elements, executable modules or data structures, or their subsets, or their extended sets: operating system 12021 and application programs 12022.
  • the operating system 12021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks.
  • the application program 12022 includes various application programs, such as a media player, a browser, etc., for implementing various application services.
  • a program for implementing methods of some embodiments of the present disclosure may be included in the application program 12022.
  • the first step is received from a network device that is not a terrestrial network.
  • Information and second information determine the timing advance of the terminal according to the first information and the second information; wherein, the first information indicates a common timing advance, or indicates a fixed timing advance offset value,
  • the second information indicates the terminal-specific timing advance.
  • a program or instruction stored in the memory 1202 by calling a program or instruction stored in the memory 1202, specifically, a program or instruction stored in the application program 12022, the following steps are implemented during execution: receiving a timing advance from a network device on a non-ground network Command TAC field; according to the received TAC field and the corresponding relationship between the TAC field and the timing advance TA index value, determine the timing advance of the terminal.
  • the terminal provided by some embodiments of the present disclosure can execute the foregoing method embodiments, and its implementation principles and technical effects are similar, and details are not described herein again in this embodiment.
  • some embodiments of the present disclosure provide a non-terrestrial network network device 1300, which includes a processor 1301, a transceiver 1302, a memory 1303, and a bus interface.
  • the processor 1301 may be responsible for managing the bus architecture and general processing.
  • the memory 1303 may store data used by the processor 1301 when performing operations.
  • the communication device 1300 may further include: a program stored in the memory 1303 and running on the processor 1301, and when the program is executed by the processor 1301, the following steps are implemented: sending the first information to the terminal And second information; wherein the first information indicates a common timing advance, or indicates a fixed timing advance offset value, and the second information indicates a terminal-specific timing advance.
  • the communication device 1300 may further include: a program that is stored in the memory 1303 and can run on the processor 1301. When the program is executed by the processor 1301, the following steps are implemented: Send the TAC field to the terminal The TAC field is used to instruct the terminal to determine the timing advance of the terminal according to the received TAC field and the corresponding relationship between the TAC field and the TA index value.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1301 and various circuits of the memory represented by the memory 1303 are linked together.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits. These are all well-known in the art. Therefore, some embodiments of the present disclosure will no longer carry on them. Further description.
  • the bus interface provides the interface.
  • the transceiver 1302 may be a plurality of elements, that is, including a transmitter and a receiver, and provide a unit for communicating with various other devices on the transmission medium.
  • the processor 1301 is responsible for managing the bus architecture and general processing, and the memory 1303 can store data used by the processor 1301 when performing operations.
  • the network equipment provided by some embodiments of the present disclosure can execute the foregoing method embodiments, and its implementation principles and technical effects are similar, and details are not described herein again in this embodiment.
  • Some embodiments of the present disclosure also provide a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by a processor, each process of the foregoing method embodiment is implemented, and the same technology can be achieved. The effect, in order to avoid repetition, will not be repeated here.
  • the computer readable storage medium such as read-only memory (Read-Only Memory, ROM for short), random access memory (Random Access Memory, RAM for short), magnetic disk or optical disk, etc.
  • some embodiments of the present disclosure provide a terminal 1400, including: wherein the first transceiver 1401 is configured to receive first information and second information from a network device on a non-terrestrial network;
  • the first receiving module 1401 is configured to receive first information and second information from a network device that is not a terrestrial network;
  • the first determining module 1402 is configured to determine the timing advance of the terminal according to the first information and the second information;
  • the first information indicates a common timing advance, or indicates a fixed timing advance offset value
  • the second information indicates a terminal-specific timing advance
  • the first receiving module 1401 is further configured to receive periodic broadcast messages from network devices on the non-terrestrial network, where the broadcast messages include the first information;
  • the first receiving module 1401 is further configured to receive a periodic synchronization signal block SSB from a network device of the non-terrestrial network, where the SSB includes the first information;
  • the first receiving module 1401 is further configured to receive a group common message from the network device of the non-terrestrial network, where the group common message includes the first information;
  • the first information indicates the common timing advance.
  • the common timing advance is applicable to all terminals in the terminal group to which the terminal belongs.
  • the first receiving module 1401 is further configured to receive a media access control MAC random access response RAR from the network device of the non-terrestrial network, where the MAC RAR includes a TAC field.
  • the first information is determined by a distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located.
  • the second information is determined by the distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located and the distance value from the network device of the non-terrestrial network to the terminal.
  • the first receiving module 1401 is further configured to receive a MAC RAR from a network device of the non-terrestrial network, where the MAC RAR includes: the first information and a TAC field, where the first information Indicates a fixed timing advance offset value, and the second information is TAC field information.
  • the first information is determined by the height value of the network device of the non-terrestrial network.
  • a non-terrestrial network network device 1500 including:
  • the second sending module 1501 is configured to send first information and second information to the terminal; wherein, the first information indicates a common timing advance or a fixed timing advance offset value, and the second information indicates all The terminal-specific timing advance.
  • the second sending module 1501 is further configured to periodically send a broadcast message to the terminal, where the broadcast message includes the first information;
  • the second sending module 1501 is further configured to periodically send an SSB to the terminal, where the SSB includes the first information;
  • the second sending module 1501 is further configured to send a group common message to the terminal, where the group common message includes the first information;
  • the first information indicates the common timing advance.
  • the common timing advance is applicable to all terminals in the terminal group to which the terminal belongs.
  • the second sending module 1501 is further configured to send a MAC RAR to the terminal, and the MAC RAR includes a TAC field.
  • the non-terrestrial network network device 1500 further includes:
  • the third determining module 1502 is configured to determine the distance value from the network device of the non-terrestrial network to the center of the cell where the terminal is located;
  • the third determining module 1502 is further configured to determine the first information according to the distance value from the network device of the non-terrestrial network to the cell center where the terminal is located.
  • the third determining module 1502 is further configured to determine the distance value from the network device of the non-terrestrial network to the terminal;
  • the third determining module 1502 is further configured to determine the distance value from the network device of the non-terrestrial network to the cell center of the terminal;
  • the third determining module 1502 is further configured to determine the difference between the distance value from the network device of the non-terrestrial network to the terminal and the distance value from the network device of the non-terrestrial network to the cell center of the terminal, Determine the second information.
  • the third determining module 1502 is further configured to determine the cell center of the terminal according to the height value of the network device of the non-terrestrial network and the ephemeris information of the network device of the non-terrestrial network;
  • the third determining module 1502 is further configured to use the center of the cell where the terminal is located as a reference point to determine the distance value from the network equipment of the non-terrestrial network to the center of the cell where the terminal is located.
  • the second sending module 1501 is further configured to send a MAC RAR to the terminal, where the MAC RAR includes: the first information and a TAC field, where the first information indicates a fixed timing advance The amount offset value, the second information is TAC field information.
  • the first information is determined by the height value of the network device of the non-terrestrial network.
  • a terminal 1600 including:
  • the second receiving module 1601 is configured to receive the TAC field of the timing advance command from a network device on a non-terrestrial network;
  • the second determining module 1602 is configured to determine the timing advance of the terminal according to the received TAC field and the corresponding relationship between the TAC field and the timing advance TA index value.
  • the second receiving module 1601 is further configured to receive a MAC RAR from a network device of the non-terrestrial network, where the MAC RAR includes: the TAC field.
  • the TA index value range adopts a TAC non-uniform quantization indication mode.
  • the value of the TA index value is non-uniformly divided into a plurality of TA index value segments, wherein the value of the TA index value in the TA index value segment is negatively correlated with the adopted step size, the The step size is used for indicating correspondence between TAC and TA index value.
  • a non-terrestrial network network device 1700 including:
  • the second sending module 1701 is configured to send a TAC field to the terminal, and the TAC field is used to instruct the terminal to determine the timing of the terminal according to the received TAC field and the correspondence between the TAC field and the TA index value Advance amount.
  • the second sending module 1701 is further configured to send a MAC RAR to the terminal, and the MAC RAR includes the TAC field.
  • the TA index value range adopts a TAC non-uniform quantization indication mode.
  • the value of the TA index value is non-uniformly divided into a plurality of TA index value segments, wherein the value of the TA index value in the TA index value segment is negatively correlated with the adopted step size, the The step size is used for indicating correspondence between TAC and TA index value.
  • the steps of the method or algorithm described in connection with the disclosure of the present disclosure may be implemented in a hardware manner, or may be implemented in a manner of executing software instructions on a processor.
  • the software instructions can be composed of corresponding software modules, and the software modules can be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disks, mobile hard disks, read-only optical disks, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and can write information to the storage medium.
  • the storage medium may also be an integral part of the processor.
  • the processor and the storage medium can be carried in an ASIC.
  • the ASIC can be carried in the core network interface device.
  • the processor and the storage medium may also exist as discrete components in the core network interface device.
  • the functions described in the present disclosure can be implemented by hardware, software, firmware, or any combination thereof. When implemented by software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium.
  • the computer-readable medium includes a computer storage medium and a communication medium, where the communication medium includes any medium that facilitates the transfer of a computer program from one place to another.
  • the storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.
  • modules, units, sub-modules, sub-units, etc. can be implemented in one or more application specific integrated circuits (ASICs), digital signal processors (Digital Signal Processing, DSP), digital signal processing equipment ( DSP Device, DSPD), Programmable Logic Device (PLD), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), general-purpose processors, controllers, microcontrollers, microprocessors, Other electronic units or combinations thereof that perform the functions described in this application.
  • ASICs application specific integrated circuits
  • DSP Digital Signal Processing
  • DSP Device digital signal processing equipment
  • PLD Programmable Logic Device
  • Field-Programmable Gate Array Field-Programmable Gate Array
  • FPGA Field-Programmable Gate Array
  • the technology described in some embodiments of the present disclosure can be implemented by modules (for example, procedures, functions, etc.) that perform the functions described in some embodiments of the present disclosure.
  • the software codes can be stored in the memory and executed by the processor.
  • the memory can be implemented in the processor or external to the processor.
  • the purpose of the present disclosure can also be realized by running a program or a group of programs on any computing device.
  • the computing device may be a well-known general-purpose device. Therefore, the purpose of the present disclosure can also be achieved only by providing a program product containing program code for implementing the method or device. That is, such a program product also constitutes the present disclosure, and a storage medium storing such a program product also constitutes the present disclosure.
  • the storage medium may be any well-known storage medium or any storage medium developed in the future. It should also be pointed out that, in the device and method of the present disclosure, obviously, each component or each step can be decomposed and/or recombined.
  • some embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, some embodiments of the present disclosure may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, some embodiments of the present disclosure may adopt computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. form.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment can be generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

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Abstract

本公开实施例提供一种定时提前确定方法及设备，该方法包括：从非地面网络的网络设备接收第一信息和第二信息；根据第一信息和第二信息，确定终端的定时提前量；其中第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，第二信息指示终端专用的定时提前量。该方法还包括：从非地面网络的网络设备接收TAC字段，根据该TAC字段以及TAC字段与定时提前TA索引值的对应关系，确定终端的定时提前量。

Description

定时提前确定方法及设备
相关申请的交叉引用
本申请主张在2019年4月30日在中国提交的中国专利申请号No.201910365346.4的优先权，其全部内容通过引用包含于此。
技术领域
本公开实施例涉及通信技术领域，尤其涉及一种定时提前确定方法及设备。
背景技术
在通信系统中，为了避免小区内干扰，在基站要求来自同一子帧但不同时频资源的不同终端(例如用户设备(User Equipment，UE))的信号到达基站的时间是对齐内。基站端只要在循环前缀(Cyclic Prefix，CP)内接收到UE发送的上行数据，就能保证接收侧的时间同步，因此提出了上行定时提前(Timing advance，TA)机制。定时提前可用于终端上行传输，指示UE根据相应指令提前相应时间发出数据包。定时提前命令(Timing Advance Command，TAC)由基站端通过TAC发送给终端，告知UE定时提前的时间大小。
如图1所示，定时提前用于指示UE根据相应指令提前相应时间发送上行数据。在UE侧看来，定时提前本质上是接收到下行子帧的起始时间与传输上行子帧的时间之间的一个负偏移。基站通过适当地控制每个UE的时间偏移(Time offset)，可以控制来自不同UE的上行信号到达基站的时间。对于离基站较远的UE，由于有较大的传输延迟，就要比离基站较近的UE使用更大的时间偏移提前发送上行数据。
然而，在非地面网络中如何确定定时提前尚未提出有效的解决方案。
发明内容
本公开实施例提供一种定时提前确定方法及设备，解决在非地面网络中 如何确定定时提前的问题。
依据本公开的一些实施例的第一方面，提供一种定时提前确定方法，应用于终端，包括：
从非地面网络的网络设备接收第一信息和第二信息；
根据所述第一信息和第二信息，确定所述终端的定时提前量；
其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量；
所述终端专用的定时提前量是正值或负值或零。
可选地，所述从非地面网络的网络设备接收第一信息，包括：
从所述非地面网络的网络设备接收周期性的广播消息，所述广播消息包括所述第一信息；
或者，
从所述非地面网络的网络设备接收周期性的同步信号块SSB，所述SSB包括所述第一信息；
或者，
从所述非地面网络的网络设备接收组公用group common消息，所述group common消息包括所述第一信息。
可选地，所述公用定时提前量适用于所述终端所属终端组内所有的终端。
可选地，所述从非地面网络的网络设备接收第二信息，包括：
从所述非地面网络的网络设备接收媒体接入控制MAC随机接入响应RAR，所述MAC RAR包括：TAC字段。
可选地，所述第一信息由所述非地面网络的网络设备到所述终端所在的小区中心的距离值确定。
可选地，所述第二信息由所述非地面网络的网络设备到所述终端所在的小区或波束中心的距离值和所述非地面网络的网络设备到所述终端的距离值确定。
可选地，所述从非地面网络的网络设备接收第一信息和第二信息，包括：
从所述非地面网络的网络设备接收MAC RAR，所述MAC RAR包括：所述第一信息和TAC字段，其中，所述第一信息指示固定的定时提前量偏移 值，所述第二信息是TAC字段信息。
可选地，所述第一信息由所述非地面网络的网络设备的高度值确定。
依据本公开的一些实施例的第二方面，提供一种定时提前确定方法，应用于非地面网络的网络设备，包括：
向终端发送第一信息和第二信息；其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量。
可选地，所述向终端发送第一信息，包括：
向终端周期性的发送广播消息，所述广播消息包括所述第一信息；
或者，
向终端周期性的发送SSB，所述SSB包括所述第一信息；
或者，
向终端发送group common消息，所述group common消息包括所述第一信息。
可选地，所述公用定时提前量适用于所述终端所属终端组内所有的终端。
可选地，所述向终端发送第二信息，包括：
向所述终端发送MAC RAR，所述MAC RAR包括：TAC字段。
可选地，所述向终端发送第一信息和第二信息之前，所述方法还包括：
确定所述非地面网络的网络设备到所述终端所在的小区中心的距离值；
根据所述非地面网络的网络设备到所述终端所在的小区中心的距离值，确定所述第一信息。
可选地，所述向终端发送第一信息和第二信息之前，所述方法还包括：
确定所述非地面网络的网络设备到所述终端的距离值；
确定所述非地面网络的网络设备到所述终端的小区中心的距离值；根据所述非地面网络的网络设备到所述终端的距离值与所述非地面网络的网络设备到所述终端的小区中心的距离值的差值，确定所述第二信息。
可选地，所述确定所述非地面网络的网络设备到所述终端所在的小区中心的距离值，包括：
根据所述非地面网络的网络设备的高度值和所述非地面网络的网络设备 的星历信息，确定所述终端的小区中心；
以所述终端所在的小区中心为参考点，确定所述非地面网络的网络设备到所述终端所在的小区中心的距离值。
可选地，所述向终端发送第一信息和第二信息，包括：
向所述终端发送MAC RAR，所述MAC RAR包括：所述第一信息和TAC字段，其中，所述第一信息指示固定的定时提前量偏移值，所述第二信息是TAC字段信息。
可选地，所述第一信息由所述非地面网络的网络设备的高度值确定。
依据本公开的一些实施例的第三方面，提供一种定时提前确定方法，应用于终端，包括：
从非地面网络的网络设备接收定时提前命令TAC字段；
根据接收到的TAC字段，以及TAC字段与定时提前TA索引值的对应关系，确定所述终端的定时提前量；
所述终端专用的定时提前量是正值或负值或零。
可选地，所述从非地面网络的网络设备接收TAC字段，包括：
从所述非地面网络的网络设备接收MAC RAR，所述MAC RAR中包括：所述TAC字段。
可选地，所述TA索引值取值范围采用TAC非均匀量化指示方式。
可选地，所述TA索引值的取值被非均匀划分成多个TA索引值段，其中所述TA索引值段中的TA索引值的取值与采用的步长呈负相关，所述步长用于进行TAC与TA索引值的指示对应。
依据本公开的一些实施例的第四方面，提供一种定时提前确定方法，应用于非地面网络的网络设备，包括：
向终端发送TAC字段，所述TAC字段用于指示所述终端根据接收到的TAC字段，以及TAC字段与TA索引值的对应关系，确定所述终端的定时提前量。
可选地，所述向终端发送TAC字段，包括：
向所述终端发送MAC RAR，所述MAC RAR中包括：所述TAC字段。
可选地，所述TA索引值取值范围采用TAC非均匀量化指示方式。
可选地，所述TA索引值的取值被非均匀划分成多个TA索引值段，其中所述TA索引值段中的TA索引值的取值与采用的步长呈负相关，所述步长用于进行TAC与TA索引值的指示对应。
依据本公开的一些实施例的第五方面，提供一种终端，包括：第一收发机和第一处理器，其中，
所述第一收发机，用于从非地面网络的网络设备接收第一信息和第二信息；
所述第一处理器，用于根据所述第一信息和第二信息，确定所述终端的定时提前量；
其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量；
所述终端专用的定时提前量是正值或负值或零。
可选地，所述第一收发机，还用于从所述非地面网络的网络设备接收周期性的广播消息，所述广播消息包括所述第一信息；
所述第一收发机，还用于从所述非地面网络的网络设备接收周期性的同步信号块SSB，所述SSB包括所述第一信息；
所述第一收发机，还用于从所述非地面网络的网络设备接收组公用group common消息，所述group common消息包括所述第一信息；
其中，所述第一信息指示公用定时提前量。
可选地，所述公用定时提前量适用于所述终端所属终端组内所有的终端。
可选地，所述第一收发机，还用于从所述非地面网络的网络设备接收媒体接入控制MAC随机接入响应RAR，所述MAC RAR包括：TAC字段。
可选地，所述第一信息由所述非地面网络的网络设备到所述终端所在的小区中心的距离值确定。
可选地，所述第二信息由所述非地面网络的网络设备到所述终端所在的小区中心的距离值和所述非地面网络的网络设备到所述终端的距离值确定。
可选地，所述第一收发机，还用于从所述非地面网络的网络设备接收MAC RAR，所述MAC RAR包括：所述第一信息和TAC字段，其中，所述第一信息指示固定的定时提前量偏移值，所述第二信息是TAC字段信息。
可选地，所述第一信息由所述非地面网络的网络设备的高度值确定。
依据本公开的一些实施例的第六方面，提供一种非地面网络的网络设备，包括：第二收发机和第二处理器，其中，
所述第二收发机，用于向终端发送第一信息和第二信息；其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量。
可选地，所述第二收发机，还用于向终端周期性的发送广播消息，所述广播消息包括所述第一信息；
所述第二收发机，还用于向终端周期性的发送SSB，所述SSB包括所述第一信息；
所述第二收发机，还用于向终端发送group common消息，所述group common消息包括所述第一信息；
其中，所述第一信息指示公用定时提前量。
可选地，所述公用定时提前量适用于所述终端所属终端组内所有的终端。
可选地，所述第二收发机，还用于向所述终端发送MAC RAR，所述MAC RAR包括：TAC字段。
可选地，所述第二处理器，用于确定所述非地面网络的网络设备到所述终端所在的小区中心的距离值；
所述第二处理器，还用于根据所述非地面网络的网络设备到所述终端所在的小区中心的距离值，确定所述第一信息。
可选地，所述第二处理器，还用于确定所述非地面网络的网络设备到所述终端的距离值；
所述第二处理器，还用于确定所述非地面网络的网络设备到所述终端的小区中心的距离值；
所述第二处理器，还用于根据所述非地面网络的网络设备到所述终端的距离值与所述非地面网络的网络设备到所述终端的小区中心的距离值的差值，确定所述第二信息。
可选地，所述第二处理器，还用于根据所述非地面网络的网络设备的高度值和所述非地面网络的网络设备的星历信息，确定所述终端的小区中心；
所述第二处理器，还用于以所述终端所在的小区中心为参考点，确定所述非地面网络的网络设备到所述终端所在的小区中心的距离值。
可选地，所述第二收发机，还用于向所述终端发送MAC RAR，所述MAC RAR包括：所述第一信息和TAC字段，其中，所述第一信息指示固定的定时提前量偏移值，所述第二信息是TAC字段信息。
可选地，所述第一信息由所述非地面网络的网络设备的高度值确定。
依据本公开的一些实施例的第七方面，提供一种终端，包括第三收发机和第三处理器，其中，
所述第三收发机，用于从非地面网络的网络设备接收定时提前命令TAC字段；
所述第三处理器，用于根据接收到的TAC字段，以及TAC字段与定时提前TA索引值的对应关系，确定所述终端的定时提前量；
所述终端专用的定时提前量是正值或负值或零。
可选地，所述第三收发机，还用于从所述非地面网络的网络设备接收MAC RAR，所述MAC RAR中包括：所述TAC字段。
可选地，所述TA索引值取值范围采用TAC非均匀量化指示方式。
可选地，所述TA索引值的取值被非均匀划分成多个TA索引值段，其中所述TA索引值段中的TA索引值的取值与采用的步长呈负相关，所述步长用于进行TAC与TA索引值的指示对应。
依据本公开的一些实施例的第八方面，提供一种非地面网络的网络设备，包括：第四收发机和第四处理器，其中，
所述第四收发机，用于向终端发送TAC字段，所述TAC字段用于指示所述终端根据接收到的TAC字段，以及TAC字段与TA索引值的对应关系，确定所述终端的定时提前量。
可选地，所述第四收发机，还用于向所述终端发送MAC RAR，所述MAC RAR中包括：所述TAC字段。
可选地，所述TA索引值取值范围采用TAC非均匀量化指示方式。
可选地，所述TA索引值的取值被非均匀划分成多个TA索引值段，其中所述TA索引值段中的TA索引值的取值与采用的步长呈负相关，所述步长用 于进行TAC与TA索引值的指示对应。
依据本公开的一些实施例的第九方面，提供一种终端，包括：其中，所述第一收发机，用于从非地面网络的网络设备接收第一信息和第二信息；
第一接收模块，用于从非地面网络的网络设备接收第一信息和第二信息；
第一确定模块，用于根据所述第一信息和第二信息，确定所述终端的定时提前量；
其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量；
所述终端专用的定时提前量是正值或负值或零。
可选地，所述第一接收模块，还用于从所述非地面网络的网络设备接收周期性的广播消息，所述广播消息包括所述第一信息；
所述第一接收模块，还用于从所述非地面网络的网络设备接收周期性的同步信号块SSB，所述SSB包括所述第一信息；
所述第一接收模块，还用于从所述非地面网络的网络设备接收组公用group common消息，所述group common消息包括所述第一信息；
其中，所述第一信息指示公用定时提前量。
可选地，所述公用定时提前量适用于所述终端所属终端组内所有的终端。
可选地，所述第一接收模块，还用于从所述非地面网络的网络设备接收媒体接入控制MAC随机接入响应RAR，所述MAC RAR包括：TAC字段。
可选地，所述第一信息由所述非地面网络的网络设备到所述终端所在的小区中心的距离值确定。
可选地，所述第二信息由所述非地面网络的网络设备到所述终端所在的小区中心的距离值和所述非地面网络的网络设备到所述终端的距离值确定。
可选地，所述第一接收模块，还用于从所述非地面网络的网络设备接收MAC RAR，所述MAC RAR包括：所述第一信息和TAC字段，其中，所述第一信息指示固定的定时提前量偏移值，所述第二信息是TAC字段信息。
可选地，所述第一信息由所述非地面网络的网络设备的高度值确定。
依据本公开的一些实施例的第十方面，提供一种非地面网络的网络设备，包括：
第二发送模块，用于向终端发送第一信息和第二信息；其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量。
可选地，所述第二发送模块，还用于向终端周期性的发送广播消息，所述广播消息包括所述第一信息；
所述第二发送模块，还用于向终端周期性的发送SSB，所述SSB包括所述第一信息；
所述第二发送模块，还用于向终端发送group common消息，所述group common消息包括所述第一信息；
其中，所述第一信息指示公用定时提前量。
可选地，所述公用定时提前量适用于所述终端所属终端组内所有的终端。
可选地，所述第二发送模块，还用于向所述终端发送MAC RAR，所述MAC RAR包括：TAC字段。
可选地，所述非地面网络的网络设备还包括：
第三确定模块，用于确定所述非地面网络的网络设备到所述终端所在的小区中心的距离值；
所述第三确定模块，还用于根据所述非地面网络的网络设备到所述终端所在的小区中心的距离值，确定所述第一信息。
可选地，所述第三确定模块，还用于确定所述非地面网络的网络设备到所述终端的距离值；
所述第三确定模块，还用于确定所述非地面网络的网络设备到所述终端的小区中心的距离值；
所述第三确定模块，还用于根据所述非地面网络的网络设备到所述终端的距离值与所述非地面网络的网络设备到所述终端的小区中心的距离值的差值，确定所述第二信息。
可选地，所述第三确定模块，还用于根据所述非地面网络的网络设备的高度值和所述非地面网络的网络设备的星历信息，确定所述终端的小区中心；
所述第三确定模块，还用于以所述终端所在的小区中心为参考点，确定所述非地面网络的网络设备到所述终端所在的小区中心的距离值。
可选地，所述第二发送模块，还用于向所述终端发送MAC RAR，所述MAC RAR包括：所述第一信息和TAC字段，其中，所述第一信息指示固定的定时提前量偏移值，所述第二信息是TAC字段信息。
可选地，所述第一信息由所述非地面网络的网络设备的高度值确定。
依据本公开的一些实施例的第十一方面，提供一种终端，包括：
第二接收模块，用于从非地面网络的网络设备接收定时提前命令TAC字段；
第二确定模块，用于根据接收到的TAC字段，以及TAC字段与定时提前TA索引值的对应关系，确定所述终端的定时提前量；
所述终端专用的定时提前量是正值或负值或零。
可选地，所述第二接收模块，还用于从所述非地面网络的网络设备接收MAC RAR，所述MAC RAR中包括：所述TAC字段。
可选地，所述TA索引值的取值非均匀划分成多个TA索引值段，其中所述TA索引值段中的TA索引值的取值与采用的步长呈负相关，所述步长用于进行TAC与TA索引值的指示对应。
依据本公开的一些实施例的第十二方面，提供一种非地面网络的网络设备，包括：
第二发送模块，用于向终端发送TAC字段，所述TAC字段用于指示所述终端根据接收到的TAC字段，以及TAC字段与TA索引值的对应关系，确定所述终端的定时提前量。
可选地，第二发送模块，还用于向所述终端发送MAC RAR，所述MAC RAR中包括：所述TAC字段。
可选地，所述TA索引值的取值非均匀划分成多个TA索引值段，其中所述TA索引值段中的TA索引值的取值与采用的步长呈负相关，所述步长用于进行TAC与TA索引值的指示对应。
依据本公开的一些实施例的第十三方面，提供一种终端，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现如第一方面所述的定时提前确定方法的步骤，或者如第三方面所述的定时提前确定方法的步骤。
依据本公开的一些实施例的第十四方面，提供一种非地面网络的网络设备，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现如第二方面所述的定时提前确定方法的步骤，或者如第四方面所述的定时提前确定方法的步骤。
依据本公开的一些实施例的第十五方面，提供一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现如第一方面所述的定时提前确定方法的步骤，或者如第二方面所述的定时提前确定方法的步骤，或者如第三方面所述的定时提前确定方法的步骤，或者如第四方面所述的定时提前确定方法的步骤。
本公开的一些实施例中，终端通过从非地面网络的网络设备接收与定时提前量相关的信息，确定终端的定时提前量，解决在非地面网络中如何确定定时提前的问题。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本公开的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1上行子帧与下子帧的结构示意图；
图2a为本公开的一些实施例提供的定时提前确定方法的流程示意图之一；
图2b为本公开的一些实施例提供的非地面网络结构示意图之一；
图2c为本公开的一些实施例提供的非地面网络结构示意图之二；
图3为本公开的一些实施例提供的定时提前确定方法的流程示意图之二；
图4为本公开的一些实施例提供的定时提前确定方法的流程示意图之三；
图5为本公开的一些实施例提供的定时提前确定方法的流程示意图之四；
图6a为本公开的一些实施例提供的定时提前确定方法的流程示意图之五；
图6b为本公开的一些实施例提供的MAC RAR中的TAC字段的结构示意图；
图7为本公开的一些实施例提供的定时提前确定方法的流程示意图之六；
图8为本公开的一些实施例提供的终端结构示意图之一；
图9为本公开的一些实施例提供的非地面网络的网络设备结构示意图之一；
图10为本公开的一些实施例提供的终端结构示意图之二；
图11为本公开的一些实施例提供的非地面网络的网络设备结构示意图之二；
图12为本公开的一些实施例提供的终端结构示意图之三；
图13为本公开的一些实施例提供的非地面网络的网络设备结构示意图之三；
图14为本公开的一些实施例提供的终端结构示意图之四；
图15为本公开的一些实施例提供的非地面网络的网络设备结构示意图之四；
图16为本公开的一些实施例提供的终端结构示意图之五；以及
图17为本公开的一些实施例提供的非地面网络的网络设备结构示意图之五。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
本申请的说明书和权利要求书中的术语“包括”以及它的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。此外，说明书以及权利要求中使用“和/或”表示所连接对象的至少其中之一，例如A和/或B，表示包含单独A，单独B，以及A和B都存在三种情况。
在本公开的一些实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本公开的一些实施例中被描述为“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。
本文所描述的技术不限于第五代移动通信(5th-generation，5G)系统以及后续演进通信系统，以及不限于LTE/LTE的演进(LTE-Advanced，LTE-A)系统，并且也可用于各种无线通信系统，诸如码分多址(Code Division Multiple Access，CDMA)、时分多址(Time Division Multiple Access，TDMA)、频分多址(Frequency Division Multiple Access，FDMA)、正交频分多址(Orthogonal Frequency Division Multiple Access，OFDMA)、单载波频分多址(Single-carrier Frequency-Division Multiple Access，SC-FDMA)和其他系统。
术语“系统”和“网络”常被可互换地使用。CDMA系统可实现诸如CDMA2000、通用地面无线电接入(Universal Terrestrial Radio Access，UTRA)等无线电技术。UTRA包括宽带CDMA(Wideband Code Division Multiple Access，WCDMA)和其他CDMA变体。TDMA系统可实现诸如全球移动通信系统(Global System for Mobile Communication，GSM)之类的无线电技术。OFDMA系统可实现诸如超移动宽带(Ultra Mobile Broadband，UMB)、演进型UTRA((Evolution-UTRA，E-UTRA))、IEEE 802.11((Wi-Fi))、IEEE 802.16((WiMAX))、IEEE 802.20、Flash-OFDM等无线电技术。UTRA和E-UTRA是通用移动电信系统(Universal Mobile Telecommunications System，UMTS)的部分。LTE和更高级的LTE(如LTE-A)是使用E-UTRA的新UMTS版本。UTRA、E-UTRA、UMTS、LTE、LTE-A以及GSM在来自名为“第三代伙伴项目”(3rd Generation Partnership Project，3GPP)的组织的文献中描述。CDMA2000和UMB在来自名为“第三代伙伴项目2”(3GPP2)的组织的文献中描述。本文所描述的技术既可用于以上提及的系统和无线电技术，也可用于其他系统和无线电技术。
本公开的一些实施例提供的终端可以为手机、平板电脑、笔记本电脑、超级移动个人计算机(Ultra-Mobile Personal Computer，UMPC)、上网本或者个人数字助理(Personal Digital Assistant，PDA)、移动上网装置(Mobile  Internet Device，MID)、可穿戴式设备(Wearable Device)或车载设备等。
非地面网络(Non-Terrestrial Network，NTN)指的是将卫星通信与5G相融合形成海陆空一体化通信网，以便为5G业务提供所需的关键性能，例如卫星可以为地面5G网络无法覆盖的偏远地区、飞机或轮船等提供经济可靠的网络服务，提高5G网络覆盖率；卫星可以为飞机、轮船、高铁等移动终端提供连续不间断的网络连接，增强5G网络的服务能力；卫星的广播/多播能力可以为网络边缘终端提供高效的数据分发服务能力。
在NR初始接入中，如图1所示，定时提前的计算方式为T TA＝(N TA+N TA,offset)×T c，其中N TA＝T A×16×64/2 μ，μ＝0,1,2,3,4,5，TA是索引值，取值范围为0～3846，通过RAR的TAC字段(共12bit)发送给UE。T c＝1/(Δf max·N f)为时间单元，最大子载波间隔为Δf max＝480·10 3Hz，FFT采样为N f＝4096。N TA,offset取决于双工模式和上行传输带宽。根据不同子载波间隔取值，可以计算出在TA索引值取值为最大值3846时，相关TA机制可以支持的最大传输距离如表1所示。
Figure PCTCN2020086721-appb-000001
表1
由表1可知，相关标准中的TA索引值不能满足非地面网络几百甚至几千km的传输距离要求，因此在NTN系统中考虑扩展TA值是必须的，而随之将导致的是RAR的比特数增加。
此外，在相关TA设计机制中，不同的终端有各自不同的上行timing advance，也就是说上行timing advance是UE specific的配置。然而在NTN系统中，尤其是非地球同步卫星系统，卫星移动速度快且位置不固定，因此可能需要每个终端的TA进行动态更新，而频繁的更新每个终端的TA值将会导致网络端信令开销过大。
参见图2a，本公开的一些实施例提供一种定时提前确定的方法，该方法 的执行主体为终端，该方法具体步骤如下：
步骤201：从非地面网络的网络设备接收第一信息和第二信息，其中第一信息指示公用定时提前量，第二信息指示终端专用的定时提前量；
步骤202：根据第一信息和第二信息，确定终端的定时提前量；
参见图2b，图中示出一种非地面网络，以非地面网络的网络设备是卫星21为例，由于卫星21的位置高，每个终端到卫星21的距离可由统一距离L2(即卫星21到终端所在小区中心的距离)和终端特定距离L1两部分组成。
在本公开的一些实施例中，为了减少网络侧开销，终端从非地面网络的网络设备接收第一信息和第二信息，该第一信息指示公用定时提前量(UE group based common TA)，该第二信息指示终端专用的定时提前量(UE specific TA)。
针对UE group based common TA：
在NTN系统中将终端按照一定规则进行分组的到终端组(例如每个波束覆盖范围内的所有终端为一个小组)，其中UE group based common TA适用于终端所属终端组内所有的终端。
具体地，终端可以通过以下方式接收UE group based common TA：
方式一、终端从非地面网络的网络设备接收周期性的广播消息，该广播消息包括第一信息；
方式二、终端从非地面网络的网络设备接收周期性的同步信号块(Synchronization Signal block，SSB)，该SSB包括第一信息；
方式三、终端从非地面网络的网络设备接收组公用(group common)消息，该group common消息包括第一信息。
在终端初始接入中，在广播消息、SSB或group common消息中包含UE group based common TA，不需要对TA值进行扩展。
本公开的一些实施例中，UE group based common TA由非地面网络的网络设备到终端所在的小区中心的距离值确定。
针对UE specific TA：
在同一个小组中的每个终端可以通过UE specific TA动态精确地调整TA值，其中UE specific TA是UE group based common TA的相对偏移值，该 偏移值可以是正偏移也可以是负偏移。
具体地，终端接收UE specific TA的方式为：终端从非地面网络的网络设备接收媒体接入控制(Media Access Control，MAC)随机接入响应(Random Access Response，RAR)，该MAC RAR包括：TAC字段，非地面网络的网络设备通过复用相关NR中的TAC字段将UE specific TA通知给终端，不需要对TA至进行扩展。
本公开的一些实施例中，UE specific TA由非地面网络的网络设备到终端所在的小区中心的距离值和非地面网络的网络设备到终端的距离值确定。建立距离值与第二信息之间建立对应关系，这样通过距离值能够直接得到对应的第二信息。
这样，为满足非地面网络高传输距离需求，不需要扩展TA值，在终端初始接入中，在广播消息、SSB或group common消息中包含UE group based common TA，并复用MAC RAR中的TAC字段指示UE specific TA，可减少信令开销，在终端需要频繁的更新TA时，也可以降低终端因检测TA指示信息的功耗。
具体地，参见图2c，在非地面网络中，卫星21可以打出多个甚至上百个波束服务用户，其中每个波束也可以服务多个终端。将使用相同波束服务的终端划分为一个终端组，例如波束1。当一个终端22在波束1服务的区域内时，因终端移动性等因素的影响，通过MAC CE通知每个终端的UE specific TA进行TA更新。当终端22由波束1服务切换到由波束2服务时，终端22根据波束2广播的UE group based TA信息进行TA调整，并根据需要可以进一步通过MAC CE通知每个终端的UE specific TA进行TA更新。
本公开的一些实施例中，终端从非地面网络的网络设备接收指示UE group based common TA的第一信息，以及指示UE specific TA的第二信息，通过该第一信息和第二信息确定定时提前量，解决在非地面网络中如何确定定时提前的问题。
参见图3，本公开的一些实施例提供一种定时提前确定方法，该方法的执行主体为非地面网络的网络设备，该方法具体步骤如下：
步骤301：向终端发送第一信息和第二信息，其中第一信息指示公用定 时提前量，第二信息指示终端专用的定时提前量；
在本公开的一些实施例中，第一信息指示UE group based common TA，第二信息指示UE specific TA。
针对UE group based common TA：
在NTN系统中将终端按照一定规则进行分组的到终端组(例如每个波束覆盖范围内的所有终端为一个小组)，其中UE group based common TA适用于终端所属终端组内所有的终端
具体地，非地面网络的网络设备可以通过以下方式向终端发送UE group based common TA：
方式一、非地面网络的网络设备向终端周期性的发送广播消息，该广播消息包括第一信息；
方式二、非地面网络的网络设备向终端周期性的发送SSB，该SSB包括第一信息；
方式三、非地面网络的网络设备向终端发送group common消息，该group common消息包括第一信息。
采用上述方式，在终端初始接入中，在广播消息、SSB或group common消息中包含UE group based common TA，不需要扩展TA值。
进一步地，在非地面网络的网络设备向终端发送第一信息之前，该方法还包括如下步骤：
(1)确定非地面网络的网络设备到终端所在的小区中心的距离值；
具体地，根据非地面网络的网络设备的高度值和非地面网络的网络设备的星历信息，确定终端的小区中心。其中，星历信息可以包括非地面网络的网络设备的移动信息、位置信息等，通过该星历信息能够确定飞行体的时间、坐标、方位速度等参数，本公开的一些实施例对星历信息的内容不做具体限定。
非地面网络的网络设备以终端所在的小区中心为参考点，确定非地面网络的网络设备到终端所在的小区中心的距离值。
(2)根据非地面网络的网络设备到终端所在的小区中心的距离值，确定第一信息；
针对UE specific TA：
在同一个小组中的每个终端可以通过UE specific TA动态精确地调整TA值，其中UE specific TA是UE group based common TA的相对偏移值，该偏移值可以是正偏移也可以是负偏移。
具体地，非地面网络的网络设备发送UE specific TA的方式为：非地面网络的网络设备向终端发送MAC RAR，该MAC RAR包括：TAC字段，非地面网络的网络设备通过复用相关NR中的TAC字段将UE specific TA通知给终端，不需要扩展TA值。
进一步地，在非地面网络的网络设备向终端发送第二信息之前，该方法还包括如下步骤：
(1)确定非地面网络的网络设备到终端的距离值；
(2)确定非地面网络的网络设备到终端的小区中心的距离值；
具体地，根据非地面网络的网络设备的高度值和非地面网络的网络设备的星历信息，确定终端的小区中心。其中，星历信息可以包括非地面网络的网络设备的移动信息、位置信息等，通过该星历信息能够确定飞行体的时间、坐标、方位速度等参数，本公开的一些实施例对星历信息的内容不做具体限定。
非地面网络的网络设备以终端所在的小区中心为参考点，确定非地面网络的网络设备到终端所在的小区中心的距离值。
(3)根据非地面网络的网络设备到终端的距离值与非地面网络的网络设备到终端的小区中心的距离值的差值，确定第二信息。
这样，为满足非地面网络高传输距离需求，不需要扩展TA值，在终端初始接入中，在广播消息、SSB或group common消息中包含UE group based common TA，并复用MAC RAR中的TAC字段指示UE specific TA，可减少信令开销，在终端需要频繁的更新TA时，也可以降低终端因检测TA指示信息的功耗。
本公开的一些实施例中，非地面网络的网络设备向终端发送指示UE group based common TA的第一信息，以及指示UE specific TA的第二信息，通过该第一信息和第二信息确定定时提前量，解决在非地面网络中如何确定 定时提前的问题。
参见图4，本公开的一些实施例提供一种定时提前确定方法，该方法的执行主体为终端，该方法的具体步骤如下：
步骤401：从非地面网络的网络设备接收第一信息和第二信息，其中第一信息指示固定的定时提前量偏移值，第二信息指示终端专用的定时提前量；
步骤402：根据第一信息和第二信息，确定终端的定时提前量；
在本公开的一些实施例中，终端接收第一信息和第二信息的方式为：从非地面网络的网络设备接收MAC RAR，该MAC RAR包括：第一信息和TAC字段，其中第一信息指示固定的定时提前量偏移值，第二信息是TAC字段信息，通过复用相关NR中的TAC字段将UE specific TA通知给终端，不需要扩展TA索引值。
针对非地面网络，复用相关RAR的时隙提前调整命令格式，但对每个RAR对应的TA值添加一个额外的偏移值，即非地面终端接收到的TAC包含两部分，一部分是第一信息，该第一信息指示固定的定时提前量偏移值，另一部分是第二信息，该第二信息指示UE specific TA，即通过TAC指定的针对每个UE需要调整的TA量，UE需要调整的TA量通过终端位置信息以及检测终端发送的上行信号来确定。
在本公开的一些实施例中，第一信息由非地面网络的网络设备的高度值确定。该具体确定过程可以采用相关方式，将非地面网络的网络设备的高度值与第一信息之间建立对应关系，这样通过高度值能够直接得到对应的第一信息。
这样，为满足非地面网络高传输距离需求，不需要扩展TA索引值，也不改变终端初始接入流程，终端在接收到RAR后解出TA值，并在此值基础上叠加一个固定的TA偏移量，此方案可以减少信令开销。
本公开的一些实施例中，终端从非地面网络的网络设备接收指示固定的定时提前量偏移值的第一信息，以及指示UE specific TA的第二信息，通过该第一信息和第二信息确定定时提前量，解决在非地面网络中如何确定定时提前的问题。
参见图5，本公开的一些实施例提供一种定时提前确定方法，该方法的 执行主体为非地面网络的网络设备，该方法的具体步骤如下：
步骤501：向终端发送第一信息和第二信息，其中第一信息指示固定的定时提前量偏移值，第二信息指示终端专用的定时提前量；
在本公开的一些实施例中，非地面网络的网络设备发送第一信息和第二信息的方式为：向终端发送MAC RAR，该MAC RAR包括：第一信息和TAC字段，其中，第一信息指示固定的定时提前量偏移值，第二信息是TAC字段信息，通过复用相关NR中的TAC字段将UE specific TA通知给终端，不需要扩展TA索引值。
针对非地面网络，复用相关RAR的时隙提前调整命令格式，但对每个RAR对应的TA值添加一个额外的偏移值，即非地面终端接收到的TAC包含两部分，一部分是第一信息，该第一信息指示固定的定时提前量偏移值，另一部分是第二信息，该第二信息指示UE specific TA，即通过TAC指定的针对每个UE需要调整的TA量，UE需要调整的TA量通过终端位置信息以及基站端检测终端发送的上行信号来确定。
在本公开的一些实施例中，第一信息由非地面网络的网络设备的高度值确定。该具体确定过程可以采用相关方式，将非地面网络的网络设备的高度值与第一信息之间建立对应关系，这样通过高度值能够直接得到对应的第一信息。
这样，为满足非地面网络高传输距离需求，不需要扩展TA索引值，也不改变终端初始接入流程，终端在接收到RAR后解出TA值，并在此值基础上叠加一个固定的TA偏移量，此方案可以减少信令开销。
本公开的一些实施例中，非地面网络的网络设备向终端发送指示固定的定时提前量偏移值的第一信息，以及指示UE specific TA的第二信息，通过该第一信息和第二信息确定定时提前量，解决在非地面网络中如何确定定时提前的问题。
参见图6a，本公开的一些实施例提供一种定时提前确定方法，该方法的执行主体为终端，该方法的具体步骤如下：
步骤601：从非地面网络的网络设备接收TAC字段；
步骤602：根据接收到的TAC字段，以及TAC字段与TA索引值的对应 关系，确定终端的定时提前量；
在本公开的一些实施例中，终端从非地面网络的网络设备接收TAC字段的方式为：从非地面网络的网络设备接收MAC RAR，该MAC RAR中包括：TAC字段。
参见图6b，图中示出一种MAC RAR中的TAC字段的结构。在NR随机接入过程中，通过测量接收到的前导码(preamble)来确定TA值，并通过MAC RAR的TAC字段发送给终端，RAR中TAC字段共12bit，对应TA索引值为0～3846，即TAC字段的比特取值与TA索引值可以形成一一对应关系。
然而在NTN系统中，由于卫星高度过高，需要基于卫星高度重新计算TA最大值来满足上行同步需求。例如考虑低空近地卫星时，卫星高度一般为600～1500km，此时TA的取值至少为7692～19230，即RAR中TAC字段要扩充至13～15bit，但在卫星通信系统中，配置较小TA值的概率很小，因此本提案提出一种针对NTN系统扩展TA索引值取值范围后的TAC非均匀量化指示方式。
在本公开的一些实施例中，该TA索引值的取值被非均匀划分成多个TA索引值段，其中TA索引值段中的TA索引值的取值与采用的步长呈负相关，例如TA索引值段中的TA索引值的取值小时采用大步长指示，TA索引值段中的TA索引值的取值大时采用小步长指示，该步长用于进行TAC与TA索引值的指示对应。
具体地，将TA索引值非均匀分成n段，例如当TA最大取值为7692时，可以分段为0～3846、3847～5769、5770～6732、6733～7214、7215～7456、7457～7578、7578～7638、7639～7668、7669～7684、7685～7692；
TA索引值取值比较小的段，使用较大的步长进行TAC与TA索引值的指示对应，TA索引值取值比较大的段，使用较小的步长进行TAC与TA索引值的指示对应；例如在RAR的12bit TAC中，当高六位的取值全为0时，低6位的取值对应0～3846的索引值，若步长为60，即当低6位取值为“000000”时，TA索引值为0，当低6位取值为“000001”时，TA索引值为60；
可以理解的是，上述对TA索引值的划分仅为示例，本公开的一些实施例对TA索引值的分段长度不做具体限定。
这样，为满足非地面网络高传输距离需求，在扩展TA索引值后，不需要增加相关RAR中TAC字段的比特数，通过重新定义TAC字段取值与TA索引值的关系即可指示额外的TA索引值。
本公开的一些实施例中，终端从非地面网络的网络设备接收TAC字段，并根据接收到的TAC字段，以及TAC字段与TA索引值的对应关系，确定终端的定时提前量，解决在非地面网络中如何确定定时提前的问题。
参见图7，本公开的一些实施例提供一种定时提前确定方法，该方法的执行主体为非地面网络的网络设备，该方法的具体步骤如下：
步骤701：向终端发送TAC字段；
在本公开的一些实施例中，TAC字段用于指示终端根据接收到的TAC字段，以及TAC字段与TA索引值的对应关系，确定终端的定时提前量。
非地面网络的网络设备向终端发送TAC字段的方式为：向终端发送MAC RAR，该MAC RAR中包括：TAC字段。
在本公开的一些实施例中，该TA索引值的取值非均匀划分成多个TA索引值段其中TA索引值段中的TA索引值的取值与采用的步长呈负相关，即TA索引值段中的TA索引值的取值小时采用大步长指示，TA索引值段中的TA索引值的取值大时采用小步长指示，该步长用于进行TAC与TA索引值的指示对应。
这样，为满足非地面网络高传输距离需求，在扩展TA索引值后，不需要增加相关RAR中TAC字段的比特数，通过重新定义TAC字段取值与TA索引值的关系即可指示额外的TA索引值。
本公开的一些实施例中，非地面网络的网络设备向终端发送TAC字段，终端根据接收到的TAC字段，以及TAC字段与TA索引值的对应关系，确定终端的定时提前量，解决在非地面网络中如何确定定时提前的问题。
参见图8，本公开的一些实施例提供一种终端800，包括：第一收发机801和第一处理器802；
其中，所述第一收发机801，用于从非地面网络的网络设备接收第一信息和第二信息；
所述第一处理器802，用于根据所述第一信息和第二信息，确定所述终 端的定时提前量；
其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量。
可选地，所述第一收发机801，还用于从所述非地面网络的网络设备接收周期性的广播消息，所述广播消息包括所述第一信息；
所述第一收发机801，还用于从所述非地面网络的网络设备接收周期性的同步信号块SSB，所述SSB包括所述第一信息；
所述第一收发机801，还用于从所述非地面网络的网络设备接收组公用group common消息，所述group common消息包括所述第一信息；
其中，所述第一信息指示公用定时提前量。
可选地，所述公用定时提前量适用于所述终端所属终端组内所有的终端。
可选地，所述第一收发机801，还用于从所述非地面网络的网络设备接收媒体接入控制MAC随机接入响应RAR，所述MAC RAR包括：TAC字段。
可选地，所述第一信息由所述非地面网络的网络设备到所述终端所在的小区中心的距离值确定。
可选地，所述第二信息由所述非地面网络的网络设备到所述终端所在的小区中心的距离值和所述非地面网络的网络设备到所述终端的距离值确定。
可选地，所述第一收发机801，还用于从所述非地面网络的网络设备接收MAC RAR，所述MAC RAR包括：所述第一信息和TAC字段，其中，所述第一信息指示固定的定时提前量偏移值，所述第二信息是TAC字段信息。
可选地，所述第一信息由所述非地面网络的网络设备的高度值确定。
参见图9，本公开的一些实施例提供一种非地面网络的网络设备900，包括：第二收发机901和第二处理器902；
其中，所述第二收发机901，用于向终端发送第一信息和第二信息；其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量。
可选地，所述第二收发机901，还用于向终端周期性的发送广播消息，所述广播消息包括所述第一信息；
所述第二收发机901，还用于向终端周期性的发送SSB，所述SSB包括所述第一信息；
所述第二收发机901，还用于向终端发送group common消息，所述group common消息包括所述第一信息；
其中，所述第一信息指示公用定时提前量。
可选地，所述公用定时提前量适用于所述终端所属终端组内所有的终端。
可选地，所述第二收发机901，还用于向所述终端发送MAC RAR，所述MAC RAR包括：TAC字段。
可选地，所述第二处理器902，用于确定所述非地面网络的网络设备到所述终端所在的小区中心的距离值；
所述第二处理器902，还用于根据所述非地面网络的网络设备到所述终端所在的小区中心的距离值，确定所述第一信息。
可选地，所述第二处理器902，还用于确定所述非地面网络的网络设备到所述终端的距离值；
所述第二处理器902，还用于确定所述非地面网络的网络设备到所述终端的小区中心的距离值；
所述第二处理器902，还用于根据所述非地面网络的网络设备到所述终端的距离值与所述非地面网络的网络设备到所述终端的小区中心的距离值的差值，确定所述第二信息。
可选地，所述第二处理器902，还用于根据所述非地面网络的网络设备的高度值和所述非地面网络的网络设备的星历信息，确定所述终端的小区中心；
所述第二处理器902，还用于以所述终端所在的小区中心为参考点，确定所述非地面网络的网络设备到所述终端所在的小区中心的距离值。
可选地，所述第二收发机901，还用于向所述终端发送MAC RAR，所述MAC RAR包括：所述第一信息和TAC字段，其中，所述第一信息指示固定的定时提前量偏移值，所述第二信息是TAC字段信息。
可选地，所述第一信息由所述非地面网络的网络设备的高度值确定。
参见图10，本公开的一些实施例提供一种终端1000，包括第三收发机 1001和第三处理器1002，其中，
所述第三收发机1001，用于从非地面网络的网络设备接收定时提前命令TAC字段；
所述第三处理器1002，用于根据接收到的TAC字段，以及TAC字段与定时提前TA索引值的对应关系，确定所述终端的定时提前量。
可选地，所述第三收发机1001第三收发机1001，还用于从所述非地面网络的网络设备接收MAC RAR，所述MAC RAR中包括：所述TAC字段。
可选地，所述TA索引值取值范围采用TAC非均匀量化指示方式。
可选地，所述TA索引值的取值被非均匀划分成多个TA索引值段，其中所述TA索引值段中的TA索引值的取值与采用的步长呈负相关，所述步长用于进行TAC与TA索引值的指示对应。
参见图11，本公开的一些实施例提供一种非地面网络的网络设备1100，包括：第四收发机1101和第四处理器1102；
其中，所述第四收发机1101，用于向终端发送TAC字段，所述TAC字段用于指示所述终端根据接收到的TAC字段，以及TAC字段与TA索引值的对应关系，确定所述终端的定时提前量。
可选地，所述第四收发机1101，还用于向所述终端发送MAC RAR，所述MAC RAR中包括：所述TAC字段。
可选地，所述TA索引值取值范围采用TAC非均匀量化指示方式。
可选地，所述TA索引值的取值被非均匀划分成多个TA索引值段，其中所述TA索引值段中的TA索引值的取值与采用的步长呈负相关，所述步长用于进行TAC与TA索引值的指示对应。
参见图12，本公开的一些实施例提供一种终端1200，包括：至少一个处理器1201、存储器1202、用户接口1203和至少一个网络接口1204。终端1200中的各个组件通过总线系统1205耦合在一起。
可以理解的是，总线系统1205用于实现这些组件之间的连接通信。总线系统1205除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图12中将各种总线都标为总线系统1205。
其中，用户接口1203可以包括显示器、键盘或者点击设备(例如，鼠标， 轨迹球、触感板或者触摸屏等)。
可以理解的是，本公开的一些实施例中的存储器1202可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDRSDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synch Link DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DRRAM)。本公开的一些实施例描述的存储器902旨在包括但不限于这些和任意其它适合类型的存储器。
在一些实施方式中，存储器1202存储了如下的元素，可执行模块或者数据结构，或者他们的子集，或者他们的扩展集：操作系统12021和应用程序12022。
其中，操作系统12021，包含各种系统程序，例如框架层、核心库层、驱动层等，用于实现各种基础业务以及处理基于硬件的任务。应用程序12022，包含各种应用程序，例如媒体播放器、浏览器等，用于实现各种应用业务。实现本公开的一些实施例方法的程序可以包含在应用程序12022中。
在本公开的一个实施例中，通过调用存储器1202保存的程序或指令，具体的，可以是应用程序12022中保存的程序或指令，执行时实现以下步骤：从非地面网络的网络设备接收第一信息和第二信息；根据所述第一信息和第二信息，确定所述终端的定时提前量；其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量。
在本公开的一个实施例中，通过调用存储器1202保存的程序或指令，具体的，可以是应用程序12022中保存的程序或指令，执行时实现以下步骤：从非地面网络的网络设备接收定时提前命令TAC字段；根据接收到的TAC字段，以及TAC字段与定时提前TA索引值的对应关系，确定所述终端的定时提前量。
本公开的一些实施例提供的终端，可以执行上述方法实施例，其实现原理和技术效果类似，本实施例此处不再赘述。
参见图13，本公开的一些实施例提供一种非地面网络的网络设备1300，包括：处理器1301、收发机1302、存储器1303和总线接口。
其中，处理器1301可以负责管理总线架构和通常的处理。存储器1303可以存储处理器1301在执行操作时所使用的数据。
在本公开的一个实施例中，通信设备1300还可以包括：存储在存储器1303上并可在处理器1301上运行的程序，该程序被处理器1301执行时实现如下步骤：向终端发送第一信息和第二信息；其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量。
在本公开的另一个实施例中，通信设备1300还可以包括：存储在存储器1303上并可在处理器1301上运行的程序，该程序被处理器1301执行时实现如下步骤：向终端发送TAC字段，所述TAC字段用于指示所述终端根据接收到的TAC字段，以及TAC字段与TA索引值的对应关系，确定所述终端的定时提前量。
在图13中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1301代表的一个或多个处理器和存储器1303代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本公开的一些实施例不再对其进行进一步描述。总线接口提供接口。收发机1302可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。
处理器1301负责管理总线架构和通常的处理，存储器1303可以存储处 理器1301在执行操作时所使用的数据。
本公开的一些实施例提供的网络设备，可以执行上述方法实施例，其实现原理和技术效果类似，本实施例此处不再赘述。
本公开的一些实施例还提供一种计算机可读存储介质，计算机可读存储介质上存储有计算机程序，该计算机程序被处理器执行时实现上述方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，所述的计算机可读存储介质，如只读存储器(Read-Only Memory，简称ROM)、随机存取存储器(Random Access Memory，简称RAM)、磁碟或者光盘等。
参见图14，本公开的一些实施例提供一种终端1400，包括：其中，所述第一收发机1401，用于从非地面网络的网络设备接收第一信息和第二信息；
第一接收模块1401，用于从非地面网络的网络设备接收第一信息和第二信息；
第一确定模块1402，用于根据所述第一信息和第二信息，确定所述终端的定时提前量；
其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量。
可选地，所述第一接收模块1401，还用于从所述非地面网络的网络设备接收周期性的广播消息，所述广播消息包括所述第一信息；
所述第一接收模块1401，还用于从所述非地面网络的网络设备接收周期性的同步信号块SSB，所述SSB包括所述第一信息；
所述第一接收模块1401，还用于从所述非地面网络的网络设备接收组公用group common消息，所述group common消息包括所述第一信息；
其中，所述第一信息指示公用定时提前量。
可选地，所述公用定时提前量适用于所述终端所属终端组内所有的终端。
可选地，所述第一接收模块1401，还用于从所述非地面网络的网络设备接收媒体接入控制MAC随机接入响应RAR，所述MAC RAR包括：TAC字段。
可选地，所述第一信息由所述非地面网络的网络设备到所述终端所在的 小区中心的距离值确定。
可选地，所述第二信息由所述非地面网络的网络设备到所述终端所在的小区中心的距离值和所述非地面网络的网络设备到所述终端的距离值确定。
可选地，所述第一接收模块1401，还用于从所述非地面网络的网络设备接收MAC RAR，所述MAC RAR包括：所述第一信息和TAC字段，其中，所述第一信息指示固定的定时提前量偏移值，所述第二信息是TAC字段信息。
可选地，所述第一信息由所述非地面网络的网络设备的高度值确定。
参见图15，本公开的一些实施例提供一种非地面网络的网络设备1500，包括：
第二发送模块1501，用于向终端发送第一信息和第二信息；其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量。
可选地，所述第二发送模块1501，还用于向终端周期性的发送广播消息，所述广播消息包括所述第一信息；
所述第二发送模块1501，还用于向终端周期性的发送SSB，所述SSB包括所述第一信息；
所述第二发送模块1501，还用于向终端发送group common消息，所述group common消息包括所述第一信息；
其中，所述第一信息指示公用定时提前量。
可选地，所述公用定时提前量适用于所述终端所属终端组内所有的终端。
可选地，所述第二发送模块1501，还用于向所述终端发送MAC RAR，所述MAC RAR包括：TAC字段。
可选地，所述非地面网络的网络设备1500还包括：
第三确定模块1502，用于确定所述非地面网络的网络设备到所述终端所在的小区中心的距离值；
所述第三确定模块1502，还用于根据所述非地面网络的网络设备到所述终端所在的小区中心的距离值，确定所述第一信息。
可选地，所述第三确定模块1502，还用于确定所述非地面网络的网络设备到所述终端的距离值；
所述第三确定模块1502，还用于确定所述非地面网络的网络设备到所述终端的小区中心的距离值；
所述第三确定模块1502，还用于根据所述非地面网络的网络设备到所述终端的距离值与所述非地面网络的网络设备到所述终端的小区中心的距离值的差值，确定所述第二信息。
可选地，所述第三确定模块1502，还用于根据所述非地面网络的网络设备的高度值和所述非地面网络的网络设备的星历信息，确定所述终端的小区中心；
所述第三确定模块1502，还用于以所述终端所在的小区中心为参考点，确定所述非地面网络的网络设备到所述终端所在的小区中心的距离值。
可选地，所述第二发送模块1501，还用于向所述终端发送MAC RAR，所述MAC RAR包括：所述第一信息和TAC字段，其中，所述第一信息指示固定的定时提前量偏移值，所述第二信息是TAC字段信息。
可选地，所述第一信息由所述非地面网络的网络设备的高度值确定。
参见图16，本公开的一些实施例提供一种终端1600，包括：
第二接收模块1601，用于从非地面网络的网络设备接收定时提前命令TAC字段；
第二确定模块1602，用于根据接收到的TAC字段，以及TAC字段与定时提前TA索引值的对应关系，确定所述终端的定时提前量。
可选地，所述第二接收模块1601，还用于从所述非地面网络的网络设备接收MAC RAR，所述MAC RAR中包括：所述TAC字段。
可选地，所述TA索引值取值范围采用TAC非均匀量化指示方式。
可选地，所述TA索引值的取值被非均匀划分成多个TA索引值段，其中所述TA索引值段中的TA索引值的取值与采用的步长呈负相关，所述步长用于进行TAC与TA索引值的指示对应。
参见图17，本公开的一些实施例提供一种非地面网络的网络设备1700，包括：
其中，第二发送模块1701，用于向终端发送TAC字段，所述TAC字段用于指示所述终端根据接收到的TAC字段，以及TAC字段与TA索引值的对 应关系，确定所述终端的定时提前量。
可选地，第二发送模块1701，还用于向所述终端发送MAC RAR，所述MAC RAR中包括：所述TAC字段。
可选地，所述TA索引值取值范围采用TAC非均匀量化指示方式。
可选地，所述TA索引值的取值被非均匀划分成多个TA索引值段，其中所述TA索引值段中的TA索引值的取值与采用的步长呈负相关，所述步长用于进行TAC与TA索引值的指示对应。
结合本公开公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以由在处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于RAM、闪存、ROM、EPROM、EEPROM、寄存器、硬盘、移动硬盘、只读光盘或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以携带在ASIC中。另外，该ASIC可以携带在核心网接口设备中。当然，处理器和存储介质也可以作为分立组件存在于核心网接口设备中。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本公开所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
可以理解的是，本公开的一些实施例描述的这些实施例可以用硬件、软件、固件、中间件、微码或其组合来实现。对于硬件实现，模块、单元、子模块、子单元等可以实现在一个或多个专用集成电路(Application Specific Integrated Circuits，ASIC)、数字信号处理器(Digital Signal Processing，DSP)、数字信号处理设备(DSP Device，DSPD)、可编程逻辑设备(Programmable Logic Device，PLD)、现场可编程门阵列(Field-Programmable Gate Array，FPGA)、通用处理器、控制器、微控制器、微处理器、用于执行本申请所述 功能的其它电子单元或其组合中。
对于软件实现，可通过执行本公开的一些实施例所述功能的模块(例如过程、函数等)来实现本公开的一些实施例所述的技术。软件代码可存储在存储器中并通过处理器执行。存储器可以在处理器中或在处理器外部实现。
因此，本公开的目的还可以通过在任何计算装置上运行一个程序或者一组程序来实现。所述计算装置可以是公知的通用装置。因此，本公开的目的也可以仅仅通过提供包含实现所述方法或者装置的程序代码的程序产品来实现。也就是说，这样的程序产品也构成本公开，并且存储有这样的程序产品的存储介质也构成本公开。显然，所述存储介质可以是任何公知的存储介质或者将来所开发出来的任何存储介质。还需要指出的是，在本公开的装置和方法中，显然，各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且，执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行，但是并不需要一定按照时间顺序执行。某些步骤可以并行或彼此独立地执行。
以上所述的具体实施方式，对本公开的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本公开的具体实施方式而已，并不用于限定本公开的保护范围，凡在本公开的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本公开的保护范围之内。
本领域内的技术人员应明白，本公开的一些实施例可提供为方法、系统、或计算机程序产品。因此，本公开的一些实施例可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本公开的一些实施例可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本公开的一些实施例是参照根据本公开的一些实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以 产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本公开的一些实施例进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的一些实施例的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (32)

  1. 一种定时提前确定方法，应用于终端，包括：
    从非地面网络的网络设备接收第一信息和第二信息；
    根据所述第一信息和第二信息，确定所述终端的定时提前量；
    其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量；
    所述终端专用的定时提前量是正值或负值或零。
  2. 根据权利要求1所述的方法，其中，所述从非地面网络的网络设备接收第一信息，包括：
    从所述非地面网络的网络设备接收周期性的广播消息，所述广播消息包括所述第一信息；
    或者，
    从所述非地面网络的网络设备接收周期性的同步信号块SSB，所述SSB包括所述第一信息；
    或者，
    从所述非地面网络的网络设备接收组公用group common消息，所述group common消息包括所述第一信息；
    其中，所述第一信息指示公用定时提前量。
  3. 根据权利要求1所述的方法，其中，所述从非地面网络的网络设备接收第二信息，包括：
    从所述非地面网络的网络设备接收媒体接入控制MAC随机接入响应RAR，所述MAC RAR包括：定时提前命令TAC字段。
  4. 根据权利要求1所述的方法，其中，所述第一信息由所述非地面网络的网络设备到所述终端所在的小区中心的距离值确定。
  5. 根据权利要求1所述的方法，其中，所述第二信息由所述非地面网络的网络设备到所述终端所在的小区或波束中心的距离值和所述非地面网络的网络设备到所述终端的距离值确定。
  6. 根据权利要求1所述的方法，其中，所述从非地面网络的网络设备接 收第一信息和第二信息，包括：
    从所述非地面网络的网络设备接收MAC RAR，所述MAC RAR包括：所述第一信息和TAC字段，其中，所述第一信息指示固定的定时提前量偏移值，所述第二信息是TAC字段信息。
  7. 一种定时提前确定方法，应用于非地面网络的网络设备，包括：
    向终端发送第一信息和第二信息；其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量。
  8. 根据权利要求7所述的方法，其中，所述向终端发送第一信息，包括：
    向终端周期性的发送广播消息，所述广播消息包括所述第一信息；
    或者，
    向终端周期性的发送SSB，所述SSB包括所述第一信息；
    或者，
    向终端发送group common消息，所述group common消息包括所述第一信息；
    其中，所述第一信息指示公用定时提前量。
  9. 根据权利要求7所述的方法，其中，所述向终端发送第二信息，包括：
    向所述终端发送MAC RAR，所述MAC RAR包括：TAC字段。
  10. 根据权利要求7所述的方法，其中，所述向终端发送第一信息和第二信息之前，所述方法还包括：
    确定所述非地面网络的网络设备到所述终端所在的小区中心的距离值；
    根据所述非地面网络的网络设备到所述终端所在的小区中心的距离值，确定所述第一信息。
  11. 根据权利要求7所述的方法，其中，所述向终端发送第一信息和第二信息之前，所述方法还包括：
    确定所述非地面网络的网络设备到所述终端的距离值；
    确定所述非地面网络的网络设备到所述终端所在的小区或波束中心的距离值；
    根据所述非地面网络的网络设备到所述终端的距离值与所述非地面网络 的网络设备到所述终端所在的小区或波束中心的距离值的差值，确定所述第二信息。
  12. 根据权利要求10或11所述的方法，其中，所述确定所述非地面网络的网络设备到所述终端所在的小区或波束中心的距离值，包括：
    根据所述非地面网络的网络设备的高度信息和所述非地面网络的网络设备的星历信息，确定所述终端所在的小区或波束中心；
    以所述终端所在的小区或波束中心为参考点，确定所述非地面网络的网络设备到所述终端所在的小区或波束中心的距离值。
  13. 根据权利要求7所述的方法，其中，所述向终端发送第一信息和第二信息，包括：
    向所述终端发送MAC RAR，所述MAC RAR包括：所述第一信息和TAC字段，其中，所述第一信息指示固定的定时提前量偏移值，所述第二信息是TAC字段信息。
  14. 一种定时提前确定方法，应用于终端，包括：
    从非地面网络的网络设备接收定时提前命令TAC字段；
    根据接收到的TAC字段，以及TAC字段与定时提前TA索引值的对应关系，确定所述终端的定时提前量；
    所述终端的定时提前量为正值或负值或零。
  15. 根据权利要求14所述的方法，其中，所述从非地面网络的网络设备接收TAC字段，包括：
    从所述非地面网络的网络设备接收MAC RAR，所述MAC RAR中包括：所述TAC字段。
  16. 根据权利要求14所述的方法，其中，所述TA索引值取值范围采用TAC非均匀量化指示方式。
  17. 根据权利要求16所述的方法，其中，所述TA索引值的取值被非均匀划分成多个TA索引值段，其中所述TA索引值段中的TA索引值的取值与采用的步长呈负相关，所述步长用于进行TAC与TA索引值的指示对应。
  18. 一种定时提前确定方法，应用于非地面网络的网络设备，包括：
    向终端发送TAC字段，所述TAC字段用于指示所述终端根据接收到的 TAC字段，以及TAC字段与TA索引值的对应关系，确定所述终端的定时提前量。
  19. 根据权利要求18所述的方法，其中，所述向终端发送TAC字段，包括：
    向所述终端发送MAC RAR，所述MAC RAR中包括：所述TAC字段。
  20. 根据权利要求18所述的方法，其中，所述TA索引值取值范围采用TAC非均匀量化指示方式。
  21. 根据权利要求20所述的方法，其中，所述TA索引值的取值被非均匀划分成多个TA索引值段，其中所述TA索引值段中的TA索引值的取值与采用的步长呈负相关，所述步长用于进行TAC与TA索引值的指示对应。
  22. 一种终端，包括：第一收发机和第一处理器，其中，
    所述第一收发机，用于从非地面网络的网络设备接收第一信息和第二信息；
    所述第一处理器，用于根据所述第一信息和第二信息，确定所述终端的定时提前量；
    其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量；
    所述终端的定时提前量为正值或负值或零。
  23. 一种非地面网络的网络设备，包括：第二收发机和第二处理器，其中，
    所述第二收发机，用于向终端发送第一信息和第二信息；其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量。
  24. 一种终端，包括第三收发机和第三处理器，其中，
    所述第三收发机，用于从非地面网络的网络设备接收定时提前命令TAC字段；
    所述第三处理器，用于根据接收到的TAC字段，以及TAC字段与定时提前TA索引值的对应关系，确定所述终端的定时提前量；
    所述终端的定时提前量为正值或负值或零。
  25. 一种非地面网络的网络设备，包括：第四收发机和第四处理器，其中，
    所述第四收发机，用于向终端发送TAC字段，所述TAC字段用于指示所述终端根据接收到的TAC字段，以及TAC字段与TA索引值的对应关系，确定所述终端的定时提前量。
  26. 一种终端，包括：
    第一接收模块，用于从非地面网络的网络设备接收第一信息和第二信息；
    第一确定模块，用于根据所述第一信息和第二信息，确定所述终端的定时提前量；
    其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量；
    所述终端的定时提前量为正值或负值或零。
  27. 一种非地面网络的网络设备，包括：
    第一发送模块，用于向终端发送第一信息和第二信息；其中，所述第一信息指示公用定时提前量，或者指示固定的定时提前量偏移值，所述第二信息指示所述终端专用的定时提前量。
  28. 一种终端，包括：
    第二接收模块，用于从非地面网络的网络设备接收定时提前命令TAC字段；
    第二确定模块，用于根据接收到的TAC字段，以及TAC字段与定时提前TA索引值的对应关系，确定所述终端的定时提前量；
    所述终端的定时提前量为正值或负值或零。
  29. 一种非地面网络的网络设备，包括：
    第二发送模块，用于向终端发送TAC字段，所述TAC字段用于指示所述终端根据接收到的TAC字段，以及TAC字段与TA索引值的对应关系，确定所述终端的定时提前量。
  30. 一种终端，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现如权利要求1至6中任一项所述的定时提前确定方法的步骤，或者如权利要求14至17中任一项所述的定时提前确定方法的步骤。
  31. 一种非地面网络的网络设备，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现如权利要求7至13中任一项所述的定时提前确定方法的步骤，或者如权利要求18至21中任一项所述的定时提前确定方法的步骤。
  32. 一种计算机可读存储介质，其中，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现如权利要求1至6中任一项所述的定时提前确定方法的步骤，或者如权利要求7至13中任一项所述的定时提前确定方法的步骤，或者如权利要求14至17中任一项所述的定时提前确定方法的步骤，或者如权利要求18至21中任一项所述的定时提前确定方法的步骤。
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