CN114614875B

CN114614875B - Method and device for determining repeated transmission times, terminal and network equipment

Info

Publication number: CN114614875B
Application number: CN202011421385.0A
Authority: CN
Inventors: 雷珍珠; 赵思聪; 周化雨
Original assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Current assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2023-01-10
Anticipated expiration: 2040-12-07
Also published as: CN114614875A; WO2022121710A1

Abstract

The embodiment of the application discloses a method and a device for determining repeated transmission times, a terminal and network equipment, which are applied to a non-ground network communication system. The method comprises the following steps: the network equipment sends first configuration information to the terminal; the terminal acquires first configuration information from the network equipment and determines the current repeated transmission times of the data channel according to the first configuration information. Therefore, in the embodiment of the present application, since the first configuration information is configured by the network, it is beneficial to implement adaptive adjustment of the number of times of retransmission of the data channel between the network device and the terminal along with the continuous change of the propagation distance between the terminal and the satellite in the non-terrestrial network communication system, and always ensure that the number of times of retransmission of the data channel between the network device and the terminal is consistent.

Description

Method and device for determining repeated transmission times, terminal and network equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for determining a number of repeated transmissions, a terminal, and a network device.

Background

Currently, the third Generation Partnership project (3 gpp) is making protocol standards for non-terrestrial network (NTN) communication, which mainly relate to space equipment (space-borne vehicle) or air-borne equipment (airborne vehicle), such as geostationary orbiting satellites, low earth orbiting satellites, high elliptic orbit satellites, high Altitude Platform Stations (HAPS), and the like.

A satellite in an NTN communication system typically generates beams (beam, otherwise known as beam fingerprints) or cells on the ground. Since the satellite moves along a fixed orbit, the propagation distance (or propagation delay) between the terminal located in the beam or cell and the satellite changes with the position of the satellite, so that the number of times of repeated transmission of the data channel during data transmission of the terminal needs to be adjusted accordingly with the position of the satellite. However, since the operation track of the satellite has regularity and periodicity, and the propagation distance between the terminal and the satellite also has regularity and periodicity, the number of repeated transmissions of the data channel may not need to be dynamically indicated by Downlink Control Information (DCI) in the NTN communication system to reduce the bit size of the DCI. In this case, how to determine the number of repeated transmissions of the data channel requires further research.

Disclosure of Invention

The embodiment of the application provides a method and a device for determining the number of repeated transmissions, a terminal and a network device, so as to hopefully realize the self-adaptive adjustment of the number of repeated transmissions of a data channel between the network device and the terminal along with the continuous change of the propagation distance between the terminal and a satellite, and always ensure the agreement between the network device and the terminal on the number of repeated transmissions of the data channel.

In a first aspect, an embodiment of the present application provides a method for determining a number of repeated transmissions, where the method is applied to a terminal in a non-terrestrial network communication system, where the non-terrestrial network communication system includes the terminal and a network device; the method comprises the following steps:

acquiring first configuration information from the network equipment;

and determining the current repeated transmission times of the data channel according to the first configuration information.

In a second aspect, an embodiment of the present application provides a method for determining a number of repeated transmissions, where the method is applied to a network device in a non-terrestrial network communication system, where the non-terrestrial network communication system includes the network device and a terminal; the method comprises the following steps:

and sending first configuration information to the terminal, wherein the first configuration information is used for determining the current repeated transmission times of the data channel.

In a third aspect, an embodiment of the present application provides a device for determining a number of repeated transmissions, where the device is applied to a terminal in a non-terrestrial network communication system, where the non-terrestrial network system includes the terminal and a network device; the apparatus comprises a processing unit and a communication unit, the processing unit being configured to:

acquiring first configuration information from the network equipment through the communication unit;

In a fourth aspect, an embodiment of the present application provides an apparatus for determining a number of repeated transmissions, where the apparatus is applied to a network device in a non-terrestrial network communication system, and the non-terrestrial network communication system includes the network device and a terminal; the apparatus comprises a processing unit and a communication unit, the processing unit being configured to:

and sending first configuration information to the terminal through the communication unit, wherein the first configuration information is used for determining the current repeated transmission times of the data channel.

In a fifth aspect, embodiments of the present application provide a terminal, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the programs include instructions for performing steps of any of the methods of the first aspect of the embodiments of the present application.

In a sixth aspect, embodiments of the present application provide a network device, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for performing the steps of any of the methods of the second aspect of the embodiments of the present application.

In a seventh aspect, an embodiment of the present application provides a chip, including a processor, configured to call and run a computer program from a memory, so that a device in which the chip is installed performs some or all of the steps described in any one of the methods of the first aspect or the second aspect of the embodiments of the present application.

In an eighth aspect, the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform part or all of the steps described in any one of the methods of the first aspect or the second aspect of the present application.

In a ninth aspect, embodiments of the present application provide a computer program, wherein the computer program is operable to cause a computer to perform some or all of the steps as described in any of the methods of the first aspect or the second aspect of the embodiments of the present application. The computer program may be a software installation package.

It can be seen that, in the embodiment of the present application, a network device in a non-terrestrial network communication system sends first configuration information to a terminal in the non-terrestrial network communication system; then, the terminal acquires the first configuration information and determines the current repeated transmission times of the data channel according to the first configuration information. The first configuration information is configured by the network, so that the self-adaptive adjustment of the repeated transmission times of the data channel between the network equipment and the terminal along with the continuous change of the propagation distance between the terminal and the satellite in the non-terrestrial network communication system is favorably realized, and the consistency of the repeated transmission times of the data channel between the network equipment and the terminal is always ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic architecture diagram of a non-terrestrial network communication system according to an embodiment of the present application;

fig. 2 is a schematic diagram of an architecture of a system with transparent satellite communication according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of comparing signal reception quality between a land network communication system and a non-land network communication system according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of an earth fixed beam scene of a non-terrestrial network communication system according to an embodiment of the present application;

fig. 5 is a schematic architecture diagram illustrating an architecture comparison of a non-terrestrial network communication system according to an embodiment of the present application;

fig. 6 is a flowchart illustrating a method for determining the number of repeated transmissions according to an embodiment of the present application;

fig. 7 is a schematic flowchart of another method for determining the number of repeated transmissions according to an embodiment of the present application;

fig. 8 is a schematic flowchart of another method for determining the number of repeated transmissions according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a mapping relationship between a plurality of RUR transmission resource blocks and a plurality of repeated transmission times according to an embodiment of the present application;

fig. 10 is a schematic flowchart of another method for determining a number of repeated transmissions according to an embodiment of the present application;

fig. 11 is a schematic flowchart of another method for determining a number of repeated transmissions according to an embodiment of the present application;

fig. 12 is a schematic flowchart of another method for determining the number of repeated transmissions according to an embodiment of the present application;

fig. 13 is a block diagram illustrating functional units of an apparatus for determining a number of repeated transmissions according to an embodiment of the present application;

fig. 14 is a block diagram illustrating functional units of another apparatus for determining a number of repeated transmissions according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without making any creative effort for the embodiments in the present application belong to the protection scope of the present application.

The technical scheme of the embodiment of the application can be applied to a non-terrestrial network (NTN) communication system, and the NTN communication system generally provides communication service for a ground terminal in a satellite communication mode.

For example, the embodiment of the present application is applied to a non-terrestrial network communication system, as shown in fig. 1. The non-terrestrial network communication system 10 may include a terminal 110, an intra-cell reference point (reference point) 120, a satellite 130, a non-terrestrial network gateway (NTN gateway) 140, and a network device 150. Wherein the terminal 110, non-terrestrial network gateway 140, and network device 150 may be located on the surface of the earth while the satellite 130 is located in earth orbit. The satellite 130 may provide communication services to a geographic area of signal coverage and may communicate with terminals 110 located within the signal coverage area. Meanwhile, the terminal 110 is located within a cell, and the cell includes an intra-cell reference point 120. Further, the wireless communication link between the terminal 110 and the satellite 130 is referred to as a service link (service link), and the wireless communication link between the satellite 130 and the non-terrestrial network gateway (NTN gateway) 140 is referred to as a feeder link (feeder link). It should be noted that the non-terrestrial network gateway (NTN gateway) 140 and the network device 150 may be integrated into the same device, or may be separate devices, which is not limited in particular.

Embodiments of the present application have been described with reference to terminals, satellites, and network devices. This will be described in detail below.

Specifically, the terminal in the embodiment of the present application may be User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, an intelligent terminal, a wireless communication device, a user agent, or a user device. The terminal may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a relay device, a vehicle-mounted device, a wearable device, a terminal in a next generation communication system such as an NR network, a terminal in a future evolved Public Land Mobile Network (PLMN), or the like, which is not particularly limited.

Further, the terminal can be deployed on land, including indoors or outdoors, hand-held, worn, or vehicle-mounted; can be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.).

Further, the terminal may be a mobile phone (mobile phone), a tablet computer, a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a vehicle-mounted device in self driving (self driving), a wireless terminal device in remote medical (remote medical), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), or the like.

In particular, the satellite in the embodiment of the present application may be a spacecraft loaded with a bent pipe payload (bent pipe payload) or a regenerative payload (regenerative payload) signal transmitter, which generally operates at a Low Earth Orbit (LEO) height between 300 and 1500km, a Medium Earth Orbit (MEO) height between 7000 and 25000km, a Geostationary Earth Orbit (GEO) height between 35786km, or a High Elliptical Orbit (HEO) height between 400 and 50000 km. That is, the satellite may be a LEO satellite, MEO satellite, GEO satellite, HEO satellite, or the like according to the orbital altitude.

Further, the signals transmitted by the satellites in the embodiments of the present application will generally produce one or more beams (alternatively referred to as beam probes) over a given service area (given service area) bounded by its field of view. Also, the shape of a beam on the ground may be elliptical, while the field of view of the satellite depends on the antenna and minimum elevation angle, etc.

In particular, the non-terrestrial network gateway in the embodiment of the present application may be an earth station or gateway located on the earth surface and capable of providing sufficient Radio Frequency (RF) power and RF sensitivity to connect to a satellite. Meanwhile, the non-terrestrial network gateway may be a Transport Network Layer (TNL) node.

Specifically, the network device in this embodiment may be a base station (BTS) in a global system for mobile communication (GSM) communication system or a Code Division Multiple Access (CDMA) communication system, a base station (NB) in a Wideband Code Division Multiple Access (WCDMA) communication system, an evolved base station (eNB or eNodeB) in a Long Term Evolution (LTE) communication system, or a base station (gNB) in a New Radio (NR) communication system. The network device may also be an Access Point (AP) in a wireless local area network WLAN, a relay station, a network device in a PLMN network for future evolution, or a network device in an NTN communication system, etc.

It should be noted that in some network deployments, the gNB may include a Centralized Unit (CU) and a Distributed Unit (DU), and the gNB may further include an Active Antenna Unit (AAU). The CU may implement part of the function of the gNB, and the DU may also implement part of the function of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing functions of a Radio Resource Control (RRC) layer and a Packet Data Convergence Protocol (PDCP) layer; the DU is responsible for processing a physical layer protocol and a real-time service, and implements functions of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. In addition, the AAU implements part of the physical layer processing functions, radio frequency processing, and active antenna related functions. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling (e.g., RRC layer signaling) can be considered to be transmitted by the DU or by the DU + AAU. It is to be understood that the network devices may comprise devices of one or more of CU nodes, DU nodes, AAU nodes. In addition, the CU may be divided into network devices in a Radio Access Network (RAN), or may be divided into network devices in a Core Network (CN), which is not limited specifically.

For example, an architectural diagram of a communication system with transparent satellite (transparent satellite) is provided in the embodiment of the present application, as shown in fig. 2. Wherein the terminal, the non-terrestrial network gateway and the gNB are located on the surface of the earth, and the satellite is located in an orbit of the earth. Meanwhile, the satellite, the non-terrestrial network gateway and the gNB can serve as a 5G radio access network (NG-RAN), and the NG-RAN is connected with a 5G core network through an NG interface. It should be noted that the satellite payload implements frequency conversion and radio frequency amplifiers in both uplink and downlink directions, and the satellite corresponds to an analog RF repeater. In addition, different transparent satellites may be connected to the same gNB on the ground.

Before describing the method for determining the number of repeated transmissions provided in the embodiment of the present application in detail, the related communication technologies related to the present application will be described.

1. NTN communication system

In an NTN communication system, a satellite typically generates one or more beams (or "beams") or cells on the ground, and a beam may be elliptical in shape on the ground. Wherein beams or cells generated above ground by some satellites (e.g., LEO satellites) also move above ground as the satellites move in their orbits; alternatively, a beam or cell generated above ground by a portion of a satellite (e.g., a LEO satellite or a GEO satellite) does not move above ground as the satellite moves in its orbit.

Since the distance between the satellite and the ground is very far (for example, the GEO satellite is 35786 km), within the coverage area of the same beam or cell, the propagation distance difference between the terminals (e.g., UEs) in different geographic positions and the satellite is small (i.e., the path loss difference of the signals corresponding to the terminals in different geographic positions within the coverage area of the same beam/cell is small), and thus the difference between the signal reception quality (including the downlink reception quality of the terminal or the uplink reception quality of the base station) corresponding to the terminals in different geographic positions within the coverage area of the same beam/cell is very small, as shown in fig. 3.

In the terrestrial network communication system shown in fig. 3 (a),

terminals

3201 and 3202 having different geographical locations within the coverage area of the same beam/cell. Since there is a large difference between the propagation distance from the network device 310 to the terminal 3201 and the propagation distance to the terminal 3202, there is a large difference between the signal reception quality corresponding to the terminal 3201 and the signal reception quality corresponding to the terminal 3202. In the NTN communication system shown in fig. 3 (b),

terminals

3401 and 3402 having different geographical locations within the coverage area of the same beam/cell. Since the distance from the satellite 330 to the ground is very long, there is a small difference between the propagation distance from the satellite 330 to the terminal 3401 and the propagation distance to the terminal 3402, resulting in a small difference between the signal reception quality corresponding to the terminal 3401 and the signal reception quality corresponding to the terminal 3402.

2. Earth-fixed beam (earth-fixed beam) scene of NTN communication system

In the earth fixed beam scenario of the NTN communication system, although a satellite may orbit along a fixed orbit, a beam (or referred to as a beam spot) or cell generated on the ground by a part of the satellite (e.g., a LEO satellite or a GEO satellite) does not move on the ground as the satellite moves on its orbit, as shown in fig. 4. The beams 420 generated by the satellites 410 on the ground do not move with the motion of the satellites 410 but assume a fixed position.

3. Architecture of NTN communication system

In the embodiment of the present application, the architecture of the NTN communication system mainly includes an NTN communication architecture (i.e., a transparent forwarding mode) with a transparent satellite (or called a bent pipe payload) and an NTN communication architecture (i.e., a regenerated signal mode) with a regenerated satellite (refer to fig. 5). Among them, fig. 5 (a) illustrates an NTN communication architecture with a transparent satellite, and fig. 5 (b) illustrates an NTN communication architecture with a regeneration satellite. In fig. 5 (a), a transparent repeating mode satellite 510 generates at least one beam 520 on the ground, and the at least one beam 520 may form a cell on the ground. At this time, the terminal 530 located in the cell may measure one of all beams of the cell and establish a communication connection with the satellite 510 through the beam. Similarly, in fig. 5 (b), the satellite 540 regenerating the signal pattern generates at least one beam 550 on the ground, and the at least one beam 550 may form one cell on the ground. At this time, the terminal 560 located in the cell can measure one of all beams of the cell and establish a communication connection with the satellite 540 through the beam.

4. Timing Advance (TA) in NTN communication system

In the NTN communication system, since a satellite continuously moves along a fixed orbit, a propagation delay (or a propagation distance) between a terminal and the satellite and a propagation delay (or a propagation distance) between the satellite and a network device (or a non-terrestrial network gateway) may rapidly change along with the continuous movement of the satellite. In order to solve the problem of the constant variation of propagation delay, the terminal needs to perform TA pre-compensation (i.e., TA adjustment) before transmitting uplink data. Wherein, a part of the compensation value may be calculated by the terminal through its own location information (e.g. calculated by a global navigation satellite system) and a satellite ephemeris (satellite ephemeris), and another part of the compensation value may be calculated by the terminal according to a common timing advance rate (common timing advance rate) indicated by the network. It should be noted that the common time advance has a correlation with the position of the satellite, that is, the common time advance has a correlation with the propagation distance between the satellite and the terminal.

5. Preconfiguration Uplink Resource (PUR)

In the current NR communication system, a terminal in an idle (idle) state or an inactive (inactive) state needs to enter a connected state through a random access procedure before transmitting data. The data transmission mechanism under idle/inactive can increase the problems of RRC signaling overhead, UE energy consumption or data transmission delay and the like. In order to ensure that the terminal can directly send data in an idle state, a processing mechanism in an existing narrowband internet of things (NB-IoT) or enhanced machine-type communication (eMTC) is that a network configures a dedicated periodic PUR for the terminal, so that the terminal can send uplink data through the PUR.

6. Number of times of repeat transmission

To ensure coverage, NB-IoT/eMTC employs a technique of repeated transmission. The maximum number of repeated transmissions for downlink transmission is 2048, and the maximum number of repeated transmissions for uplink transmission is 128. In addition, the number of times of retransmission of a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) may be dynamically indicated by Downlink Control Information (DCI) scheduled by the Physical Downlink Shared Channel (PDSCH), that is, DCI has a specific bit field for indicating the number of times of retransmission of the PDSCH or the PUSCH. Meanwhile, the maximum number of repetitions (i.e., rmax) of a Physical Downlink Control Channel (PDCCH) may be semi-statically configured by RRC signaling or a System Information Block (SIB).

Secondly, in a terrestrial network communication system (as shown in fig. 3), since there is a large difference in propagation distance between a terminal and a base station at different geographic locations within the coverage area of the same beam/cell, when the terminal receives or transmits data, the terminal located at different geographic locations (such as the cell center or the cell edge) needs different numbers of repeated transmissions of data channels (i.e. the number of repeated transmissions of PDSCH/PUSCH/PRACH/PDCCH). Currently, for the problem of the number of repeated transmissions in terrestrial network communication, the network can dynamically indicate the number of repeated transmissions of the PDSCH/PUSCH by a specific bit field in DCI scheduling the PDSCH/PUSCH.

Finally, in the NTN communication system, since the propagation distance difference between the terminal at different geographic positions within the coverage area of the same beam/cell and the satellite is small (i.e., the path loss difference of the signal corresponding to the terminal at different geographic positions within the coverage area of the same beam/cell is small), and the change of the propagation distance of the serving link (serving link) and the feeding link (feeder link) is regular and periodic, this results in that the NTN communication system may not need to dynamically indicate the number of times of repeated transmission of the data channel through the DCI, so that the bit size of the DCI (i.e., the payload of the DCI) may be reduced, and the PDCCH reception or the PDCCH robustness of the DCI is improved, etc.

However, in the NTN communication system, since the propagation distance between the terminal and the satellite may change from moment to moment, it is necessary to further study the problem of the number of repeated transmissions of the data channel when the terminal performs data transmission (including downlink data transmission or uplink data transmission).

In conjunction with the above description, an embodiment of the present application provides a flowchart of a method for determining a number of repeated transmissions, which is applied to a non-terrestrial network communication system, please refer to fig. 6. The method comprises the following steps:

s610, the network equipment sends first configuration information to the terminal.

Wherein the first configuration information may be used to determine a current number of repeated transmissions of the data channel.

It should be noted that the technical solution in the embodiment of the present application is applicable to both the transparent forwarding mode and the regenerated signal mode. In the transparent forwarding mode, the first configuration information is transmitted by a network device located on the ground. In the regenerated signal mode, the first configuration information is transmitted by the network device located at the satellite, since the network device is located at the satellite.

In addition, the current number of repeated transmissions of the data channel may be understood as the number of repeated transmissions of the current data channel or the number of repeated transmissions required for data transmission on the current data channel, which is not particularly limited. Meanwhile, the current number of iterative transfer may also be understood as a first number of iterative transfer, and "first", "second", and the like in the embodiment of the present application are used to distinguish different objects, rather than to describe a specific order.

It should be further noted that, since a satellite in the NTN communication system generates a beam or a cell on the ground and the satellite moves along a fixed orbit continuously, a propagation distance (or a propagation delay) between a terminal located in the beam or the cell and the satellite changes with a change in the position of the satellite, so that the number of times of repeated transmission of a data channel by the terminal during data transmission needs to be adjusted accordingly with the change in the position of the satellite. Therefore, the network device sends the first configuration information to the terminal, and the terminal determines the current repeated transmission times of the data channel according to the first configuration information, so that the repeated transmission times of the data channel between the network device and the terminal are adaptively adjusted along with the continuous change of the propagation distance between the terminal and the satellite, and the consistency of the repeated transmission times of the data channel between the network device and the terminal is always ensured.

Specifically, the first configuration information may be indicated by at least one of radio resource control RRC dedicated signaling, a medium access control element (MAC CE), and system broadcast information.

It should be noted that, since the trajectory of the satellite in the NTN communication system has regularity and periodicity, this causes the propagation distance of the serving link (serving link) and the feeder link (feeder link) in the NTN communication system to change also with regularity and periodicity, so that the NTN communication system may not need to dynamically indicate the number of repeated transmissions of the data channel through the DCI in order to reduce the bit size of the DCI. For this reason, the embodiment of the present application considers that the network device transmits the first configuration information to the terminal through at least one of RRC dedicated signaling, MAC CE, and system broadcast information to implement adaptive adjustment of the number of repeated transmissions.

Further, the system broadcast information may include System Information Block (SIB) information.

Specifically, the data channel may include at least one of: a physical uplink shared channel PUSCH, a physical downlink shared channel PDSCH, a physical random access channel PRACH and a pre-configured uplink resource PUR.

It can be understood that, the number of repeated transmissions of the PUSCH/PDSCH/PRACH/PUR is adjusted by the network in the embodiments of the present application.

S620, the terminal acquires first configuration information from the network equipment.

S630, the terminal determines the current repeated transmission times of the data channel according to the first configuration information.

It can be seen that, in the embodiment of the present application, a network device in a non-terrestrial network communication system sends first configuration information to a terminal in the non-terrestrial network communication system; then, the terminal acquires the first configuration information and determines the current repeated transmission times of the data channel according to the first configuration information. The first configuration information is configured by the network, so that the self-adaptive adjustment of the repeated transmission times of the data channel between the network equipment and the terminal along with the continuous change of the propagation distance between the terminal and the satellite is favorably realized, and the consistency of the repeated transmission times of the data channel between the network equipment and the terminal is always ensured.

In conjunction with the above description, the following embodiments of the present application will specifically describe the first configuration information.

In one possible example, the first configuration information may include one of: the method comprises the steps of initial value index information, value effective time delay information, first mapping relation information, current public time lead and current public time lead change rate.

Specifically, the initial value index (index) information may be used to determine a target value in the value list information, and the value list information is configured by the network; the value effective time delay information can be used for indicating the terminal to take the target value as the time delay of the current repeated transmission times; the value list (list) information may be used to indicate a list consisting of a plurality of retransmission times (i.e., at least two retransmission times) in order.

It should be noted that, in the embodiment of the present application, the first configuration information includes initial value index information and value effective time delay information. At this time, the terminal may determine a target value in the value list information according to the initial value index information, and then take the target value as the current repeated transmission times according to the value effective time delay information. The first configuration information and the value list information are configured by the network equipment, so that the self-adaptive adjustment of the repeated transmission times of the data channel between the network equipment and the terminal along with the continuous change of the propagation distance between the terminal and the satellite is further realized, and the consistency of the repeated transmission times of the data channel between the network equipment and the terminal is ensured.

Further, the value list information may satisfy at least one of the following modes: the values in the value list information are determined by the propagation distance between the terminal and the satellite in the non-ground network communication system, and the arrangement sequence of the values in the value list information has a corresponding relation with the motion position of the satellite.

It should be noted that, since the distance between the satellite and the ground is very long, even if the terminal moves continuously (i.e., the current location of the terminal changes continuously) in a period of time, the propagation distance between the terminal and the satellite changes little. Based on this, the embodiment of the present application considers that the position of the terminal is approximately constant in a period of time, and mainly analyzes the change of the propagation distance between the terminal and the satellite caused by the position change of the satellite.

Meanwhile, because the satellite has a fixed running track (for example, the running track is determined through a satellite ephemeris), in the embodiment of the present application, a set of propagation distances between the terminal and the satellite is determined by the network device according to the running track of the satellite and the current position of the terminal, and each value in the value list information is determined according to the set of propagation distances, so that a mapping relationship between the propagation distances between the terminal and the satellite and the values in the value list information is established. In addition, the arrangement sequence of the values in the value list information has a corresponding relationship with the operating position of the satellite, and the corresponding relationship may be one-to-one.

Specifically, the first mapping relationship information may be used to indicate a mapping relationship between a propagation distance of the terminal to a satellite in the non-terrestrial network communication system and the number of repeated transmissions.

It should be noted that, in the embodiment of the present application, it is considered that the network device determines the set of propagation distances between the terminal and the satellite according to the running track of the satellite and the current position of the terminal, and then establishes the mapping relationship between the set of propagation distances and the multiple retransmission times to obtain the first mapping relationship information, so that the terminal determines the current retransmission times according to the first mapping relationship information, further implementing adaptive adjustment of the retransmission times of the data channel between the network device and the terminal along with the continuous change of the propagation distances between the terminal and the satellite, and ensuring that the network device and the terminal achieve consistency in the retransmission times of the data channel.

Specifically, the current common timing advance may be used to determine the current number of repeated transmissions from second mapping relationship information, where the second mapping relationship information is configured by the network; the current common time advance change rate may be used to determine a current common time advance; the second mapping information may be used to indicate a mapping between the common timing advance and the number of repeated transmissions. The mapping relationship may be that an interval of a common time advance corresponds to a number of repeated transmissions.

It should be noted that, in the embodiment of the present application, it is considered that the first configuration information includes a current common time advance or a current common time advance change rate. At this time, the terminal may determine the current number of repeated transmissions from the second mapping relationship information according to the current common time advance. Or, the terminal may determine the current common time advance according to the current common time advance change rate, and then determine the current retransmission times from the second mapping relationship information according to the current common time advance. The first configuration information and the second mapping relation information are configured by the network equipment, so that the self-adaptive adjustment of the repeated transmission times of the data channel between the network equipment and the terminal along with the continuous change of the propagation distance between the terminal and the satellite is further realized, and the consistency of the repeated transmission times of the data channel between the network equipment and the terminal is ensured.

As can be seen from the above description, since there are multiple situations of the information included in the first configuration information, there may be multiple technical solutions in the embodiments of the present application to solve the problem of how to determine the number of times of repeated transmission of the data channel. The embodiments of the present application will specifically describe the various technical solutions from the following situations.

The first situation is as follows:

in a possible example, if the first configuration information includes the initial value index information and the value effective delay information, before the network device sends the first configuration information to the terminal, the method may further include the following steps: the network equipment sends first information to the terminal, and the first information comprises value list information.

In a possible example, if the first configuration information includes the initial value index information and the value effective time delay information, before the terminal acquires the first configuration information from the network device, the method may further include the following steps: the terminal acquires first information from the network equipment, wherein the first information comprises value list information.

Specifically, the first information may be indicated by system broadcast information or RRC dedicated signaling.

It should be noted that, in the embodiment of the present application, it is considered that the network device sends the first information to the terminal through the system broadcast information or the RRC dedicated signaling to obtain the value list information, that is, the value list information is indicated or configured to the terminal through the system broadcast information or the RRC dedicated signaling.

Further, the system broadcast information may include SIB information.

In one possible example, the terminal determines the current number of repeated transmissions of the data channel according to the first configuration information, and may include the following steps: the terminal determines a target value from the value list information according to the initial value index information; and after the time delay information is overtime, the terminal takes the target value as the current repeated transmission times.

It should be noted that, since the value list information may be used to indicate a list formed by a plurality of repeated transmission times in sequence, the terminal may index the value of the corresponding position from the value list information by using the initial value index information to obtain the target value.

In addition, since the value in the value list information configured by the network device is determined by the propagation distance between the terminal and the satellite, and the propagation distance changes with the position change of the satellite, in order to synchronize the number of times of repeated transmission of the data channel between the network device and the terminal, the embodiment of the present application also considers the effective value delay information configured by the network device. The value effective time delay information can effectively reflect the position change of the satellite, and the terminal takes the target value as the current repeated transmission times after the value effective time delay information is overtime, so that the consistency of the repeated transmission times of the data channel between the network equipment and the terminal is further ensured.

According to the description, the terminal determines the current repeated transmission times of the data channel according to the initial value index information, the value effective time delay information and the value list. Therefore, how to implement the technical scheme of updating the current repeated transmission times is also considered in the embodiment of the present application, and the following detailed description is given by two sub-cases.

Sub-case 1:

in one possible example, the first information may further include update period information; the update period information may be used to indicate a period in which the terminal updates the current number of repeated transmissions to a next value at a position where the target value is located in the value list information, and the period starts from a time when the value validation delay information is overtime.

It is understood that the network device may configure or indicate the value list information and the update cycle information to the terminal at the same time. At this time, the terminal may periodically update the current number of repeated transmissions by updating the period information.

Specifically, the unit of the period may be one of a millisecond (ms), a subframe (subframe), a frame (frame), a slot (slot), and a PDCCH monitoring period, which is not particularly limited.

Sub-case 2:

in one possible example, after the network device sends the first configuration information to the terminal, the method further includes the steps of: and sending first indication information to the terminal through the MAC CE, wherein the first indication information is used for indicating the terminal to update the current repeated transmission times to a next value of the target value at the position of the value list information.

In one possible example, after the terminal determines the current number of repeated transmissions of the data channel according to the first configuration information, the method further includes the steps of: the terminal receives the MAC CE from the network equipment to acquire first indication information, wherein the first indication information is used for indicating the terminal to update the current repeated transmission times to a next value of the position where the target value is located in the value list information.

It can be understood that the network device instructs the terminal to update the current number of repeated transmissions by issuing the MAC CE.

In summary, the following embodiments of the present application summarize the technical solution in "case one" in the following two ways:

the method I comprises the following steps:

for the network device, the network device sends the first information to the terminal through system broadcast information or RRC dedicated signaling. The first information comprises value list information and updating period information. Then, the network device transmits the first configuration information to the terminal through RRC dedicated signaling or MAC CE. The first configuration information includes initial value index information and value effective time delay information.

For the terminal, first, the terminal receives system broadcast information or RRC dedicated signaling from the network device to acquire first information. The first information comprises value list information and updating period information. Second, the terminal receives RRC dedicated signaling or MAC CE from the network device to acquire the first configuration information. The first configuration information includes initial value index information and value effective time delay information. And thirdly, the terminal determines a target value from the value list information according to the initial value index information, and takes the target value as the current repeated transmission times of the data channel after the value effective time delay information is overtime. And finally, the terminal updates the current repeated transmission times to the next value of the target value at the position of the value list information according to the updating period information.

Illustratively, "way one" may be exemplified as the flow shown in fig. 7.

The second method comprises the following steps:

for the network device, the network device sends the first information to the terminal through system broadcast information or RRC dedicated signaling. The first information comprises value list information. Then, the network device transmits the first configuration information to the terminal through RRC dedicated signaling or MAC CE. The first configuration information includes initial value index information and value effective time delay information. And finally, the network equipment transmits the first indication information to the terminal through the MAC CE.

For the terminal, first, the terminal acquires first information from the network device through system broadcast information or RRC dedicated signaling. The first information comprises value list information. Secondly, the terminal acquires first configuration information from the network equipment through RRC dedicated signaling or MAC CE; the first configuration information includes initial value index information and value effective time delay information. And thirdly, the terminal determines a target value from the value list information according to the initial value index information, and takes the target value as the current repeated transmission times of the data channel after the time of the value effective time delay information is overtime. And finally, the terminal receives the MAC CE from the network equipment to acquire first indication information, and updates the current repeated transmission times to a next value of the position of the target value in the value list information according to the first indication information.

Exemplarily, "means two" may be exemplified as the flow shown in fig. 8.

In summary, the following embodiments of the present application will illustrate the technical solution in "case one".

Examples are 1: the terminal obtains the value list information from the network device as { K1, K2, K3, K4, K5} and the update cycle information as Xms through system broadcast information or RRC dedicated signaling. Secondly, the terminal obtains the initial value index information of 2 and the value effective time delay information of Y ms from the network equipment through RRC dedicated signaling or MAC CE. And thirdly, the terminal obtains a target value K2 from the value list information through the initial value index information, and takes the K2 as the current repeated transmission times of the data channel after the value effective time delay information Y ms is overtime. And finally, the terminal takes the moment after the value validation time delay information is overtime as a starting point, and after X ms, the current repeated transmission times are updated to be the next value K3 of the K2 at the position of { K1, K2, K3, K4, K5}. It should be noted that the terminal may use K2 as a starting point, and update the next value every X ms in sequence, that is, K2 in the first X ms, K3 in the second X ms, and so on.

For example, 2: the terminal obtains the value list information from the network equipment as { K1, K2, K3, K4, K5} through system broadcast information or RRC dedicated signaling. Secondly, the terminal obtains the initial value index information of 2 and the value effective time delay information Y ms from the network equipment through RRC dedicated signaling or MAC CE. And thirdly, the terminal obtains a target value K2 from the value list information through the initial value index information, and takes the K2 as the current repeated transmission times of the data channel after the value effective time delay information Y ms is overtime. And finally, the terminal acquires the first indication information through the MAC CE for the first time, and updates the current repeated transmission times to K2 at the next value K3 of the position of { K1, K2, K3, K4, K5} according to the first indication information. It should be noted that, when the terminal acquires the first indication information through the MAC CE for the second time, the terminal updates K3 to K4, and so on.

The second situation:

in one possible example, if the first configuration information includes the first mapping relationship information, before the network device sends the first configuration information to the terminal, the method may further include the following steps: the network device sends second configuration information for the PUR transmission to the terminal, where the second configuration information may include information of a PUR transmission period, information of resource configuration of a PUR transmission opportunity, and information of a mapping relationship between a PUR transmission resource block and a number of repeated transmissions.

In one possible example, if the first configuration information includes the first mapping relationship information, before the terminal acquires the first configuration information from the network device, the method further includes the following steps: and the terminal acquires second configuration information aiming at the PUR transmission from the network equipment, wherein the second configuration information comprises PUR transmission period information, resource configuration information of the PUR transmission opportunity and mapping relation information between the PUR transmission resource block and the repeated transmission times.

Specifically, the PUR transmission period information may be used to indicate a period of PUR transmission.

Specifically, the resource configuration information of the PUR transmission occasion (occasion) may be used to indicate a plurality of RUR transmission resource blocks configured by the PUR transmission occasion. Wherein, the plurality of PUR transmission resource blocks can be distinguished in a time division or frequency division manner.

Specifically, the mapping relationship information between the PUR transmission resource block and the number of repeated transmissions may be used to indicate a mapping relationship between a plurality of RUR transmission resource blocks configured in the PUR transmission occasion and a plurality of repeated transmissions. Wherein the mapping relationship may be that each of the plurality of RUR transmission resource blocks corresponds to one of the plurality of repeated transmission times. This is illustrated in detail by fig. 9.

For example, referring to fig. 9, 4 PUR transmission resource blocks, that is, a PUR transmission resource block 910, a PUR transmission resource block 920, a PUR transmission resource block 930, and a PUR transmission resource block 940, are configured at the nth PUR transmission timing. Wherein, the number of repeated transmissions of the data channel corresponding to the PUR transmission resource block 910 is 1; the number of repeated transmissions of the data channel corresponding to the PUR transmission resource block 920 is 2; the number of repeated transmissions of the data channel corresponding to the PUR transmission resource block 930 is 3; the number of repeated transmissions of the data channel corresponding to the PUR transmission resource block 940 is 4.

Specifically, the second configuration information may be indicated by RRC dedicated signaling.

It should be noted that, in the embodiment of the present application, it is considered that the network device sends the second configuration information to the terminal through the RRC dedicated signaling to obtain the PUR transmission period information, the resource configuration information of the PUR transmission timing, and the mapping relationship information between the PUR transmission resource block and the number of repeated transmissions.

In one possible example, the terminal determines the current number of repeated transmissions of the data channel according to the first configuration information, and may include the following steps: the method comprises the steps that a terminal obtains first propagation distance information, and the first propagation distance information can be used for indicating the propagation distance between the current position information of the terminal and a satellite; and the terminal determines the current repeated transmission times from the first mapping relation information according to the first transmission distance information.

It should be noted that, because the first propagation distance information may be used to indicate a propagation distance between the current location information of the terminal and the satellite, and the first mapping relationship information may be used to indicate a mapping relationship between the propagation distance from the terminal to the satellite and the number of times of retransmission, the terminal may index the corresponding number of times of retransmission from the first mapping relationship information through the first propagation distance information to serve as the current number of times of retransmission, thereby further implementing adaptive adjustment of the number of times of retransmission of the data channel between the network device and the terminal along with the continuous change of the propagation distance between the terminal and the satellite, and ensuring that the number of times of retransmission of the data channel between the network device and the terminal is consistent.

Specifically, the acquiring, by the terminal, the first propagation distance information may include the following steps: the terminal acquires the current position information; and the terminal calculates to obtain first propagation distance information according to the current position information and a preset satellite ephemeris.

It should be noted that the terminal may obtain the current location information through a Global Navigation Satellite System (GNSS), and then obtain the propagation distance between the current location and the satellite through the current location information and a preset satellite ephemeris.

In one possible example, after the terminal determines the current number of repeated transmissions from the first mapping relationship information according to the first propagation distance information, the method may further include the steps of: and the terminal determines the current PUR transmission resource block according to the second configuration information and the current repeated transmission times, and transmits uplink data through the current PUR transmission resource block.

It should be noted that, because the mapping relationship information between the PUR transmission resource block and the number of repeated transmissions may be used to indicate the mapping relationship between the plurality of rui transmission resource blocks configured in the PUR transmission opportunity and the number of repeated transmissions, the terminal may index the corresponding PUR transmission resource block from the mapping relationship information through the current number of repeated transmissions to serve as the current PUR transmission resource block, and thus perform uplink data transmission through the current PUR transmission resource block to implement the PUR transmission.

In addition, in case two, the network device in case one may also be adopted to instruct the terminal to update the current retransmission times by issuing the MAC CE, which is not described herein again.

In summary, the following embodiments of the present application summarize the technical solution in "case two" as follows:

for the network device, the network device sends second configuration information for the PUR transmission to the terminal through RRC dedicated signaling. The second configuration information includes information of the transmission period of the PUR, information of resource configuration of the transmission opportunity of the PUR, and information of mapping relationship between the transmission resource block of the PUR and the number of repeated transmissions. Then, the network device transmits the first configuration information to the terminal through RRC dedicated signaling or MAC CE. The first configuration information includes first mapping relationship information.

For the terminal, first, the terminal receives RRC dedicated signaling from the network device to acquire second configuration information for the PUR transmission. The second configuration information includes information of a transmission period of the PUR, information of resource configuration of a transmission opportunity of the PUR, and information of a mapping relationship between a transmission resource block of the PUR and the number of repeated transmissions. Second, the terminal receives RRC dedicated signaling or MAC CE from the network device to acquire the first configuration information. The first configuration information includes first mapping relationship information. And thirdly, the terminal acquires the first transmission distance information and determines the current repeated transmission times from the first mapping relation information according to the first transmission distance information. And finally, the terminal determines the current PUR transmission resource block according to the second configuration information and the current repeated transmission times, and transmits uplink data through the current PUR transmission resource block.

Exemplary, "case two" may be exemplified as the flow shown in fig. 10.

A third situation:

in one possible example, if the first configuration information includes a current common time advance or a current common time advance change rate, before the network device sends the first configuration information to the terminal, the method may further include the following steps: and the network equipment sends the second mapping relation information to the terminal.

In one possible example, if the first configuration information includes a current common time advance or a current common time advance change rate, before the terminal acquires the first configuration information from the network device, the method may further include the following steps: and the terminal acquires the second mapping relation information from the network equipment.

Specifically, the second mapping relationship information may be indicated by system broadcast information or RRC dedicated signaling.

It should be noted that, in the embodiment of the present application, it is considered that the network device sends the second mapping relationship information to the terminal through system broadcast information or RRC dedicated signaling.

In one possible example, the terminal determining the current number of repeated transmissions of the data channel according to the first configuration information may include the following steps: the terminal determines the current repeated transmission times from the second mapping relation information according to the current public time lead; or the terminal determines the current public time lead according to the current public time lead change rate; and the terminal determines the current repeated transmission times from the second mapping relation information according to the current public time lead.

It should be noted that, since the second mapping relationship information may be used to indicate a mapping relationship between the common time advance and the number of retransmissions, the terminal may index a corresponding number of retransmissions from the second mapping relationship information by using the current common time advance to serve as the current number of retransmissions, thereby further implementing adaptive adjustment of the number of retransmissions of the data channel between the network device and the terminal along with a continuous change of a propagation distance between the terminal and the satellite, and ensuring that a correspondence is achieved between the network device and the terminal in the number of retransmissions of the data channel.

In addition, how the terminal determines the current common time advance according to the change rate of the current common time advance can be calculated by the following formula:

T _com ＝T ₀ +α·t；

wherein, T _com Representing a current common time advance; t is ₀ Representing an initial common time advance and configured by the network; alpha represents the current common time advance change rate; t represents the time size.

In addition, in case three, the network device in case one may also be adopted to instruct the terminal to update the current retransmission times by issuing the MAC CE, which is not described herein again.

In summary, the following embodiments of the present application summarize the technical solution in "case three" in the following two ways:

the first method is as follows:

for the network device, the network device sends the second mapping relation information to the terminal through system broadcast information or RRC dedicated signaling. Then, the network device transmits the first configuration information to the terminal through RRC dedicated signaling or MAC CE. Wherein the first configuration information comprises a current common time advance.

For the terminal, first, the terminal receives system broadcast information or RRC dedicated signaling from the network device to acquire the second mapping relationship information. Second, the terminal receives RRC dedicated signaling or MAC CE from the network device to acquire the first configuration information. Wherein the first configuration information comprises a current common time advance. And finally, the terminal determines the current repeated transmission times from the second mapping relation information according to the current public time lead.

Illustratively, "case three" may be exemplified as the flow shown in fig. 11.

The second method comprises the following steps:

for the network device, the network device sends the second mapping relation information to the terminal through system broadcast information or RRC dedicated signaling. Then, the network device transmits the first configuration information to the terminal through system broadcast information or RRC dedicated signaling. Wherein the first configuration information comprises a current common time advance change rate.

For the terminal, first, the terminal receives system broadcast information or RRC dedicated signaling from the network device to acquire the second mapping relationship information. Second, the terminal receives system broadcast information or RRC dedicated signaling from the network device to acquire the first configuration information. Wherein the first configuration information comprises a current common time advance change rate. And thirdly, the terminal determines the current public time lead according to the change rate of the current public time lead. And finally, the terminal determines the current repeated transmission times from the second mapping relation information according to the current public time advance.

Illustratively, "case three" may be exemplified as the flow shown in fig. 12.

As can be seen, through the above description of the related technologies in the "case one", "case two", and "case three", the embodiments of the present application may have various technical solutions to solve the problem of how to determine the number of times of retransmission of the data channel, so as to implement adaptive adjustment of the number of times of retransmission of the data channel between the network device and the terminal along with the continuous change of the propagation distance between the terminal and the satellite, and always ensure that the number of times of retransmission of the data channel between the network device and the terminal is consistent.

The above introduces the solution of the embodiment of the present application mainly from the perspective of interaction between network elements in the method side. It is understood that the terminal or the network device includes a hardware structure and/or a software module for performing the respective functions in order to implement the above functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the terminal or the network device may be divided into the functional units according to the above method examples, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software program module. It should be noted that the division of the units in the embodiment of the present application is illustrative, and is only one division of the logic functions, and there may be another division in actual implementation.

In the case of employing an integrated unit, fig. 13 provides a block diagram of functional units of a repeat transmission number determination apparatus. The device 1300 for determining the number of repeated transmissions is applied to a terminal in a non-terrestrial network communication system, and specifically includes: a processing unit 1302 and a communication unit 1303. The processing unit 1302 is configured to control and manage actions of the terminal, for example, the processing unit 1302 is configured to support the terminal to execute the steps in fig. 6, fig. 7, fig. 8, fig. 10, fig. 11, or fig. 12 and other processes for the technical solutions described in this application. The communication unit 1303 is used to support communication between the terminal and other devices in the non-terrestrial network communication system. The repeated transmission number determination apparatus 1300 may further include a storage unit 1301 for storing program codes and data of the terminal.

The processing unit 1302 may be a processor or a controller, and may be, for example, a Central Processing Unit (CPU), a general purpose processor, a Digital Signal Processor (DSP), an application-specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processing unit 1302 may also be a combination of computing functions, e.g., comprising one or more microprocessors, a combination of DSPs and microprocessors, or the like. The communication unit 1303 may be a communication interface, a transceiver, a transmitting and receiving circuit, and the like, and the storage unit 1301 may be a memory. When the processing unit 1302 is a processor, the communication unit 1303 is a communication interface, and the storage unit 1301 is a memory, the retransmission number determining apparatus 1300 according to the embodiment of the present application may be a terminal shown in fig. 15.

In a specific implementation, the processing unit 1302 is configured to execute any step executed by the terminal in the above method embodiment, and when data transmission such as sending is executed, the communication unit 1303 may be optionally called to complete the corresponding operation. The following is a detailed description.

The processing unit 1302 is configured to: acquiring first configuration information from network equipment; and determining the current repeated transmission times of the data channel according to the first configuration information.

It should be noted that, specific implementation of each operation may be described in detail in the method embodiments shown in fig. 6, fig. 7, fig. 8, fig. 10, fig. 11, or fig. 12, and details are not described here again.

It can be seen that, in the embodiment of the present application, the first configuration information of the network device is obtained, and the current number of times of the repeated transmission of the data channel is determined according to the first configuration information. The first configuration information is configured by the network, so that the self-adaptive adjustment of the repeated transmission times of the data channel between the network equipment and the terminal along with the continuous change of the propagation distance between the terminal and the satellite in the non-terrestrial network communication system is favorably realized, and the consistency of the repeated transmission times of the data channel between the network equipment and the terminal is always ensured.

In one possible example, the first configuration information is indicated by at least one of radio resource control, RRC, dedicated signaling, medium access control, control element, MAC CE, system broadcast information.

In one possible example, the data channel includes at least one of: a Physical Uplink Shared Channel (PUSCH), a Physical Downlink Shared Channel (PDSCH), a Physical Random Access Channel (PRACH), and a pre-configured uplink resource (PUR).

In one possible example, the first configuration information includes one of: the system comprises initial value index information, value effective time delay information, first mapping relation information, current public time lead and current public time lead change rate.

In one possible example, the initial value index information is used to determine a target value in the value list information, and the value list information is configured by the network; the value effective time delay information is used for indicating the terminal to take the target value as the time delay of the current repeated transmission times; the value list information is used to indicate a list composed of a plurality of repeated transmission times in order.

In one possible example, the value list information satisfies at least one of the following: the values in the value list information are determined by the propagation distance between the terminal and the satellite in the non-ground network communication system, and the arrangement sequence of the values in the value list information has a corresponding relation with the motion position of the satellite.

In a possible example, if the first configuration information includes start value index information and value validation delay information, before acquiring the first configuration information from the network device, the processing unit 1302 is further configured to: first information from network equipment is obtained, and the first information comprises value list information.

In one possible example, the first information is indicated by system broadcast information or RRC dedicated signaling.

In one possible example, in terms of determining the current number of repeated transmissions of the data channel according to the first configuration information, the processing unit 1302 is specifically configured to: determining a target value from the value list information according to the initial value index information; and taking the target value as the current repeated transmission times after the time delay information of the effective value is overtime.

In one possible example, the first information further includes update cycle information; the update period information is used for representing a period in which the terminal updates the current repeated transmission times to a next value of the position where the target value is located in the value list information, and the period takes the time when the value effective time delay information is overtime as a starting point.

In one possible example, after determining the current number of repeated transmissions of the data channel according to the first configuration information, the processing unit 1302 is further configured to: and receiving the MAC CE from the network equipment to acquire first indication information, wherein the first indication information is used for indicating the terminal to update the current repeated transmission times to a next value of the position where the target value is located in the value list information.

In one possible example, the first mapping information is used to indicate a mapping between a propagation distance of the terminal to a satellite in the non-terrestrial network communication system and a number of repeated transmissions.

In one possible example, if the first configuration information includes the first mapping relationship information, before the first configuration information is acquired from the network device, the processing unit 1302 is further configured to: and acquiring second configuration information aiming at the PUR transmission from the network equipment, wherein the second configuration information comprises PUR transmission period information, resource configuration information of a PUR transmission opportunity and mapping relation information between a PUR transmission resource block and repeated transmission times.

In one possible example, the second configuration information is indicated by RRC dedicated signaling.

In one possible example, in terms of determining the current number of repeated transmissions of the data channel according to the first configuration information, the processing unit 1302 is specifically configured to: acquiring first propagation distance information, wherein the first propagation distance information is used for indicating the propagation distance between the current position information of the terminal and a satellite; and determining the current repeated transmission times from the first mapping relation information according to the first transmission distance information.

In one possible example, after determining the current number of repeated transmissions from the first mapping relationship information according to the first propagation distance information, the processing unit 1302 is further configured to: and determining the current PUR transmission resource block according to the second configuration information and the current repeated transmission times, and transmitting uplink data through the current PUR transmission resource block.

In one possible example, the current common time advance is used to determine a current number of repeated transmissions from second mapping information, the second mapping information being configured by the network; the current public time advance change rate is used for determining the current public time advance; the second mapping relation information is used for indicating the mapping relation between the common time advance and the repeated transmission times.

In a possible example, if the first configuration information includes a current common time advance or a current common time advance change rate, before acquiring the first configuration information from the network device, the processing unit 1302 is further configured to: and acquiring second mapping relation information from the network equipment.

In one possible example, the second mapping relationship information is indicated by system broadcast information or RRC dedicated signaling.

In one possible example, in terms of determining the current number of repeated transmissions of the data channel according to the first configuration information, the processing unit 1302 is specifically configured to: determining the current repeated transmission times from the second mapping relation information according to the current public time lead; or, determining the current public time lead according to the current public time lead change rate; and determining the current repeated transmission times from the second mapping relation information according to the current common time advance.

In the case of using an integrated unit, fig. 14 provides a block diagram of functional units of still another iterative transfer number determination apparatus. The device 1400 for determining the number of repeated transmissions is applied to a network device in a non-terrestrial network communication system, and specifically includes: a processing unit 1402 and a communication unit 1403. The processing unit 1402 is configured to control and manage actions of the network device, for example, the processing unit 1402 is configured to support the network device to execute the steps in fig. 6, fig. 7, fig. 8, fig. 10, fig. 11, or fig. 12 and other processes for the technical solutions described in this application. Communication unit 1403 is used to support communication between the network device and other devices in the non-terrestrial network communication system. The repeated transmission number determination apparatus 1400 may further include a storage unit 1401 for storing program codes and data of the network device.

Processing unit 1402 may be a processor or controller, such as a CPU, DSP, ASIC, FPGA or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. Processing unit 1402 may also be a combination of computing functions, e.g., comprising one or more microprocessors, a combination of DSPs and microprocessors, and the like. The communication unit 1403 may be a communication interface, a transceiver circuit, etc., and the storage unit 1401 may be a memory. When the processing unit 1402 is a processor, the communication unit 1403 is a communication interface, and the storage unit 1401 is a memory, the device 1400 for determining the number of repeated transmissions according to the embodiment of the present application may be a network device shown in fig. 16.

In a specific implementation, the processing unit 1402 is configured to perform any one of the steps performed by the network device in the above method embodiments, and when performing data transmission such as sending, optionally invokes the communication unit 1403 to complete the corresponding operation. The details will be described below.

The processing unit 1402 is configured to: and sending first configuration information to the terminal, wherein the first configuration information is used for determining the current repeated transmission times of the data channel.

It can be seen that, in the embodiment of the present application, the first configuration information is sent to the terminal, and the first configuration information is used to determine the current number of repeated transmissions of the data channel. Because the first configuration information is configured by the network, the number of times of retransmission of the data channel between the network device and the terminal is adaptively adjusted along with the continuous change of the propagation distance between the terminal and the satellite in the non-terrestrial network communication system, and the agreement between the network device and the terminal on the number of times of retransmission of the data channel is always ensured.

In one possible example, the first configuration information is indicated by at least one of radio resource control, RRC, dedicated signaling, medium access control, element, MAC CE, system broadcast information.

In one possible example, the data channel includes at least one of: a physical uplink shared channel PUSCH, a physical downlink shared channel PDSCH, a physical random access channel PRACH and a pre-configured uplink resource PUR.

In a possible example, if the first configuration information includes the start value index information and the value effective time delay information, before sending the first configuration information to the terminal, the processing unit 1402 is further configured to: and sending first information to the terminal, wherein the first information comprises value list information.

In one possible example, after sending the first configuration information to the terminal, the processing unit 1402 is further configured to: and sending first indication information to the terminal through the MAC CE, wherein the first indication information is used for indicating the terminal to update the current repeated transmission times to a next value of the target value at the position of the value list information.

In one possible example, if the first configuration information includes the first mapping relationship information, before sending the first configuration information to the terminal, the processing unit 1402 is further configured to: and sending second configuration information aiming at the PUR transmission to the terminal, wherein the second configuration information comprises PUR transmission period information, resource configuration information of a PUR transmission opportunity and mapping relation information between a PUR transmission resource block and repeated transmission times.

In one possible example, if the first configuration information includes the current common time advance or the current common time advance change rate, before transmitting the first configuration information to the terminal, the processing unit 1402 is further configured to: and sending the second mapping relation information to the terminal.

Referring to fig. 15, fig. 15 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure. Terminal 1500 includes, among other things, processor 1510, memory 1520, communication interface 1530, and at least one communication bus connecting processor 1510, memory 1520, and communication interface 1530.

The memory 1520 includes, but is not limited to, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (PROM), or a portable read-only memory (CD-ROM), and the memory 1520 is for storing associated instructions and data.

Communication interface 1530 is used for receiving and transmitting data.

The processor 1510 may be one or more CPUs, and in the case where the processor 1510 is one CPU, the CPU may be a single-core CPU or a multi-core CPU.

The processor 1510 in the terminal 1500 is configured to read one or more programs 1521 stored in the memory 1520 to perform the following steps: acquiring first configuration information from network equipment; and determining the current repeated transmission times of the data channel according to the first configuration information.

It should be noted that specific implementation of each operation can be described in detail in the method embodiments shown in fig. 6, fig. 7, fig. 8, fig. 10, fig. 11, or fig. 12, and is not described in detail here.

In one possible example, the first configuration information includes one of: the method comprises the steps of initial value index information, value effective time delay information, first mapping relation information, current public time lead and current public time lead change rate.

In one possible example, if the first configuration information includes start value index information and value validation latency information, before acquiring the first configuration information from the network device, the processor 1510 is configured to read one or more programs 1521 stored in the memory 1520 and further perform the following steps: first information from network equipment is obtained, and the first information comprises value list information.

In one possible example, in determining the current number of repeated transmissions of the data channel according to the first configuration information, the processor 1510 is configured to read one or more programs 1521 stored in the memory 1520 and perform the following steps: determining a target value from the value list information according to the initial value index information; and after the time delay information is overtime, taking the target value as the current repeated transmission times.

In one possible example, the first information further includes update period information; the update period information is used for representing a period in which the terminal updates the current repeated transmission times to a next value of the position where the target value is located in the value list information, and the period takes the time when the value effective time delay information is overtime as a starting point.

In one possible example, after determining the current number of repeated transmissions of the data channel according to the first configuration information, the processor 1510 is configured to read one or more programs 1521 stored in the memory 1520 to further perform the following steps: and receiving the MAC CE from the network equipment to acquire first indication information, wherein the first indication information is used for indicating the terminal to update the current repeated transmission times to a next value of the position where the target value is located in the value list information.

In one possible example, if the first configuration information includes the first mapping relationship information, before obtaining the first configuration information from the network device, the processor 1510 is configured to read one or more programs 1521 stored in the memory 1520 and further perform the following steps: and acquiring second configuration information aiming at the PUR transmission from the network equipment, wherein the second configuration information comprises PUR transmission period information, resource configuration information of a PUR transmission opportunity and mapping relation information between a PUR transmission resource block and repeated transmission times.

In one possible example, in determining the current number of repeated transmissions of the data channel according to the first configuration information, the processor 1510 is configured to read one or more programs 1521 stored in the memory 1520 and perform the following steps: acquiring first propagation distance information, wherein the first propagation distance information is used for indicating the propagation distance between the current position information of the terminal and a satellite; and determining the current repeated transmission times from the first mapping relation information according to the first transmission distance information.

In one possible example, after determining the current number of repeated transmissions from the first mapping relationship information according to the first propagation distance information, the processor 1510 is configured to read one or more programs 1521 stored in the memory 1520 and further perform the following steps: and determining the current PUR transmission resource block according to the second configuration information and the current repeated transmission times, and transmitting uplink data through the current PUR transmission resource block.

In one possible example, the current common time advance is used to determine a current number of repeated transmissions from second mapping relationship information, the second mapping relationship information being configured by the network; the current public time advance change rate is used for determining the current public time advance; the second mapping relation information is used for indicating the mapping relation between the common time advance and the repeated transmission times.

In one possible example, if the first configuration information includes a current common time advance or a current common time advance change rate, then prior to obtaining the first configuration information from the network device, the processor 1510 is configured to read one or more programs 1521 stored in the memory 1520 and further perform the following steps: and acquiring second mapping relation information from the network equipment.

In one possible example, in determining the current number of repeated transmissions of the data channel according to the first configuration information, the processor 1510 is configured to read one or more programs 1521 stored in the memory 1520 and perform the following steps: determining the current repeated transmission times from the second mapping relation information according to the current public time advance; or, determining the current public time lead according to the current public time lead change rate; and determining the current repeated transmission times from the second mapping relation information according to the current common time advance.

Referring to fig. 16, fig. 16 is a schematic structural diagram of a network device according to an embodiment of the present application. Network device 1600 includes a processor 1610, a memory 1620, a communication interface 1630, and at least one communication bus connecting processor 1610, memory 1620, and communication interface 1630.

Memory 1620, including but not limited to RAM, ROM, PROM, or CD-ROM, is used to store relevant instructions and data.

Communication interface 1630 is used to receive and transmit data.

The processor 1610 may be one or more CPUs, and in the case where the processor 1610 is one CPU, the CPU may be a single-core CPU or a multi-core CPU.

The processor 1610 in the network device 1600 is configured to read the one or more programs 1621 stored in the memory 1620 to perform the following steps: and sending first configuration information to the terminal, wherein the first configuration information is used for determining the current repeated transmission times of the data channel.

In a possible example, if the first configuration information includes the start value index information and the value effective delay information, before sending the first configuration information to the terminal, the processor 1610 is configured to read one or more programs 1621 stored in the memory 1620 to further perform the following steps: and sending first information to the terminal, wherein the first information comprises value list information.

In one possible example, the first information further includes update period information; the updating period information is used for representing a period that the terminal updates the current repeated transmission times to a next value of the position where the target value is located in the value list information, and the period takes the moment when the value effective time delay information is overtime as a starting point.

In one possible example, after sending the first configuration information to the terminal, the processor 1610 is configured to read the one or more programs 1621 stored in the memory 1620 to further perform the following steps: and sending first indication information to the terminal through the MAC CE, wherein the first indication information is used for indicating the terminal to update the current repeated transmission times to a next value of the target value at the position of the value list information.

In one possible example, if the first configuration information includes the first mapping relationship information, the processor 1610 is configured to read one or more programs 1621 stored in the memory 1620 to further perform the following steps before sending the first configuration information to the terminal: and sending second configuration information aiming at the PUR transmission to the terminal, wherein the second configuration information comprises PUR transmission period information, resource configuration information of the PUR transmission opportunity and mapping relation information between the PUR transmission resource block and the repeated transmission times.

In one possible example, if the first configuration information includes the current common time advance or the current common time advance change rate, before transmitting the first configuration information to the terminal, the processor 1610 is configured to read one or more programs 1621 stored in the memory 1620 to further perform the following steps: and sending the second mapping relation information to the terminal.

The present application further provides a chip, where the chip includes a processor, and is configured to call and run a computer program from a memory, so that a device in which the chip is installed performs some or all of the steps described in the terminal or the network device in the foregoing method embodiments.

Embodiments of the present application further provide a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform some or all of the steps described in the above method embodiments for a terminal or a network device.

Embodiments of the present application further provide a computer program product, where the computer program product includes a computer program operable to cause a computer to perform some or all of the steps described in the above method embodiments for a terminal or a network device. The computer program product may be a software installation package.

The steps of a method or algorithm described in the embodiments of the present application may be implemented in hardware or by executing software instructions by a processor. The software instructions may consist of corresponding software modules that may be stored in RAM, flash memory, ROM, erasable Programmable Read Only Memory (EPROM), electrically Erasable Programmable Read Only Memory (EEPROM), registers, a hard disk, a removable hard disk, a compact disc read only memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a terminal or network device. Of course, the processor and the storage medium may reside as discrete components in a terminal or network device.

It will be appreciated by those of skill in the art that in one or more of the examples described above, the functionality described in the embodiments of the application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

The above-mentioned embodiments, objects, technical solutions and advantages of the embodiments of the present application are further described in detail, it should be understood that the above-mentioned embodiments are only specific embodiments of the present application, and are not intended to limit the scope of the embodiments of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of the embodiments of the present application.

Claims

1. A method for determining repeated transmission times is characterized in that the method is applied to a terminal in a non-ground network communication system, and the non-ground network communication system comprises the terminal and network equipment; the method comprises the following steps:

obtaining first configuration information from the network device, the first configuration information including one of: the method comprises the steps that initial value index information, value effective time delay information, first mapping relation information, current public time lead and a current public time lead change rate are obtained, wherein the first mapping relation information is used for indicating the mapping relation between the propagation distance from a terminal to a satellite in the non-ground network communication system and the repeated transmission times;

2. The method of claim 1, wherein the first configuration information is indicated by at least one of Radio Resource Control (RRC) dedicated signaling, medium Access Control (MAC) control element (MAC CE), and system broadcast information.

3. The method of claim 1, wherein the data channel comprises at least one of: a physical uplink shared channel PUSCH, a physical downlink shared channel PDSCH, a physical random access channel PRACH and a pre-configured uplink resource PUR.

4. The method of claim 1, wherein the initial value index information is used to determine a target value in value list information, the value list information configured by a network;

the value effective time delay information is used for indicating the terminal to take the target value as the time delay of the current repeated transmission times;

the value list information is used for indicating a list composed of a plurality of repeated transmission times in sequence.

5. The method of claim 4, wherein the value list information satisfies at least one of the following: the values in the value list information are determined by the propagation distance between the terminal and the satellite in the non-ground network communication system, and the arrangement sequence of the values in the value list information has a corresponding relation with the motion position of the satellite.

6. The method according to claim 4, wherein if the first configuration information includes the start value index information and the value effective delay information, before the acquiring the first configuration information from the network device, the method further includes:

and acquiring first information from the network equipment, wherein the first information comprises the value list information.

7. The method of claim 6, wherein the first information is indicated by system broadcast information or RRC dedicated signaling.

8. The method of claim 6, wherein determining the current number of repeated transmissions of the data channel according to the first configuration information comprises:

determining the target value from the value list information according to the initial value index information;

and after the time delay information of the value taking effect is overtime, taking the target value as the current repeated transmission times.

9. The method of claim 6, wherein the first information further comprises update period information;

the update period information is used for indicating a period in which the terminal updates the current repeated transmission times to a next value of the target value at the position of the value list information, and the period takes the time when the value effective time delay information is overtime as a starting point.

10. The method of claim 6, wherein after determining the current number of repeated transmissions of the data channel according to the first configuration information, the method further comprises:

and receiving the MAC CE from the network equipment to acquire first indication information, wherein the first indication information is used for indicating the terminal to update the current repeated transmission times to a next value of the position of the target value in the value list information.

11. The method of claim 1, wherein if the first configuration information includes the first mapping relationship information, before the obtaining the first configuration information from the network device, the method further comprises:

and acquiring second configuration information aiming at the PUR transmission from the network equipment, wherein the second configuration information comprises PUR transmission period information, resource configuration information of a PUR transmission opportunity and mapping relation information between a PUR transmission resource block and repeated transmission times.

12. The method of claim 11, wherein the second configuration information is indicated by RRC dedicated signaling.

13. The method of claim 11, wherein determining the current number of repeated transmissions of the data channel according to the first configuration information comprises:

acquiring first propagation distance information, wherein the first propagation distance information is used for indicating the propagation distance between the current position information of the terminal and the satellite;

and determining the current repeated transmission times from the first mapping relation information according to the first transmission distance information.

14. The method according to claim 13, wherein after determining the current number of repeated transmissions from the first mapping relation information according to the first propagation distance information, the method further comprises:

and determining a current PUR transmission resource block according to the second configuration information and the current repeated transmission times, and transmitting uplink data through the current PUR transmission resource block.

15. A method for determining the number of repeated transmissions is applied to network equipment in a non-terrestrial network communication system, wherein the non-terrestrial network communication system comprises the network equipment and a terminal; the method comprises the following steps:

sending first configuration information to the terminal, wherein the first configuration information is used for determining the current repeated transmission times of a data channel, and the first configuration information comprises one of the following: the terminal comprises initial value index information, value effective time delay information, first mapping relation information, current public time lead and a current public time lead change rate, wherein the first mapping relation information is used for indicating a mapping relation between a propagation distance from the terminal to a satellite in the non-ground network communication system and the repeated transmission times.

16. The method of claim 15, wherein the first configuration information is indicated by at least one of Radio Resource Control (RRC) dedicated signaling, media Access Control (MAC) control element (MAC CE), and system broadcast information.

17. The method of claim 15, wherein the data channel comprises at least one of: a Physical Uplink Shared Channel (PUSCH), a Physical Downlink Shared Channel (PDSCH), a Physical Random Access Channel (PRACH), and a pre-configured uplink resource (PUR).

18. The method of claim 15, wherein the starting value index information is used to determine a target value in value list information, the value list information configured by a network;

19. The method of claim 18, wherein the value list information satisfies at least one of the following conditions: the values in the value list information are determined by the propagation distance between the terminal and the satellite in the non-ground network communication system, and the arrangement sequence of the values in the value list information has a corresponding relation with the motion position of the satellite.

20. The method of claim 18, wherein if the first configuration information includes the start value index information and the value effective delay information, before the sending of the first configuration information to the terminal, the method further comprises:

and sending first information to the terminal, wherein the first information comprises the value list information.

21. The method of claim 20, wherein the first information is indicated by system broadcast information or RRC dedicated signaling.

22. The method of claim 20, wherein the first information further comprises update cycle information;

23. The method of claim 20, wherein after the sending the first configuration information to the terminal, the method further comprises:

and sending first indication information to the terminal through the MAC CE, wherein the first indication information is used for indicating the terminal to update the current repeated transmission times to a next value of the target value at the position of the value list information.

24. The method according to claim 15, wherein if the first configuration information includes the first mapping relationship information, before the sending of the first configuration information to the terminal, the method further comprises:

and sending second configuration information aiming at the PUR transmission to the terminal, wherein the second configuration information comprises PUR transmission period information, resource configuration information of a PUR transmission opportunity and mapping relation information between a PUR transmission resource block and repeated transmission times.

25. The method of claim 24, wherein the second configuration information is indicated by RRC dedicated signaling.

26. A device for determining the number of repeated transmissions is applied to a terminal in a non-terrestrial network communication system, wherein the non-terrestrial network communication system comprises the terminal and network equipment; the apparatus comprises a processing unit and a communication unit, the processing unit being configured to:

acquiring, by the communication unit, first configuration information from the network device, the first configuration information including one of: the method comprises the steps that initial value index information, value effective time delay information, first mapping relation information, current public time lead and a current public time lead change rate are obtained, wherein the first mapping relation information is used for indicating the mapping relation between the propagation distance from a terminal to a satellite in the non-ground network communication system and the repeated transmission times;

27. The device for determining the repeated transmission times is applied to network equipment in a non-terrestrial network communication system, wherein the non-terrestrial network communication system comprises the network equipment and a terminal; the apparatus comprises a processing unit and a communication unit, the processing unit being configured to:

sending, by the communication unit, first configuration information to the terminal, where the first configuration information is used to determine a current number of repeated transmissions of a data channel, and the first configuration information includes one of: the terminal comprises initial value index information, value effective time delay information, first mapping relation information, current public time lead and a current public time lead change rate, wherein the first mapping relation information is used for indicating a mapping relation between a propagation distance from the terminal to a satellite in the non-ground network communication system and the repeated transmission times.

28. A terminal comprising a processor, memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 1-14.

29. A network device comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs including instructions for performing the steps in the method of any of claims 15-25.

30. A computer-readable storage medium, characterized in that it stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform the method according to any one of claims 1-14 or 15-25.